CA2106053C

CA2106053C - Tile having a pattern and its manufacturing method

Info

Publication number: CA2106053C
Application number: CA 2106053
Authority: CA
Inventors: Yoshinori Kakamu; Shinichi Kakamu; Shukichi Kakamu
Original assignee: Mino Ganryo Kagaku Corp
Current assignee: Mino Ganryo Kagaku Corp
Priority date: 1992-09-16
Filing date: 1993-09-13
Publication date: 1998-08-04
Anticipated expiration: 2013-09-13
Also published as: DE69325962T2; DE69325962D1; AU662837B2; AU4738793A; CN1067320C; CA2106053A1; CN1093971A

Abstract

A tile having a desired pattern is provided. The pattern goes through the tile in the thickness direction.
For manufacturing such a tile, e.g. a partition plate 84 is disposed in a pressure forming die 91 so as to divide its inside space into an outer forming space 95 and an inner forming space 96. Light black granules and light red granules are filled respectively in the outer and inner forming spaces 95, 96. Then, the partition wall 84 is taken out from the die 91, and lining granules are filled over the colored granules. Thereafter, they are pressed into one body and burned.

Description

2 ~ 5 3 SPECIFICATION

TILE HAVING A PATTERN AND ITS MANUFACTURING METHOD

BACKGROUND OF THE INVENTION
Field of the Inventlon - The present lnvention relates to a nonglazed tile provlded wlth a deslgn of many colors or a colored pattern and its manufacturing method, particularly to a tile which ls able to keep an initial distinct and vlvid pattern even against long tlme abrasion and its manufacturlng method.
Such tiles may be laid on a floor of a bathroom, a lavatory or the like, sldewalks of a park, a shopping center or the llke, etc. Such tiles may be also used for an lnterlor or exterlor wall material of a bullding or applled to tlling at stepped portions of stairs or roads, corners o~
gateposts or buildings, etc.

Descriptlon of Related Art Conventlonally, cement tlles, whlch are cheap, are generally used for tiles having a pattern that are laid on a sidewalk, a floor or the l~ke whlle serving as an ornament, slnce such tlles need to be lnexpensive. Each plece of tlle ls a plain colored tile of generally a rectangular shape fabricated by a colored body added with a kneaded pigment. Varlous colors of tiles are used ln combinatlon and ~oined to each other by a ~olntlng cement.
In case one plece o~ rectangular tlle needs to have a multicolored pattern, ln general, colored tile pieces sf different colors are separately made, thereafter the - colored tile pleces of different colors and shapes are ~ointed by a cement at the time of laying.
There 1~ a tlle havlng a pattern wlth only a surface printed by a pl~ment.
However, with the method of making a pattern by a manner of arranglng the rectangular plaln colored tiles as the conventlonal tlles having a pattern, patterns to be 2~6~3 formed are llmited in simple patterns such as a diced pattern, now that a piece of floor tile is large, l.e.
200mm or 300mm square.
With the method of ~olntlng the colored tile pleces by a cement at the time of laying, a white llne of the ~ointing cement which is exposed after ~olning is easy to become dirty and unclear particularly in a floor, a pavement or the like. Moreover, if the ~olnted part ls made into a line as narrow as possible, inadvantageously it ls peeled off with tlme. With this method, a border of the colored tile pieces is also limited ln a straight line or a curved line very simllar to the straight line due to work convenience. In addition, as the colored tile pieces are separately made, a ~ointing work by the cement ~oining them each other is multiplied, then taking much time and labor in a laying work at a ~ob site.
Furthermore, though the cement tile can be manufactured at low costs, slnce it does not experlence burnlng, it ls lnferior to a burnt tile in luster or the llke, and ls low ln strength, partlcularly a surface strength thereby being abraded wlth time, e.g. when pedestrlans pass thereon. Such a tlle needs to be thlck in order to assure a flxed strength, so that a transportation work efflclency ls lower~d.
The tile wlth the surface alone printed by an organlc plgment ls lnadvantageously decolored wi~h tlme.
By the reasons mentlor,ed above, burnt tlles are deslrously used at a sidewalk of a shop street, a park or the like an appearance of which i8 thought lmportant.
Some methods are used for glvlng a pattern to a nonglazing tile as a burnt tlle. One method ls to form flutes or lrre~ularltie~. Other method is to disperse rock powders or colored tlle powders to obtain a spotted pattern. However, these methods are not satlsfactory ln view of ornamentatlon. There is a tlle provided with a baklng pattern by printing or handwriting on a surface of a green body or a biscuit tile, too~ However, the thickness of the pattern of thls tlle ls about O.1 to O.3mm, so that the pattern i9 faded by abra~lon or the tiles are posslbly slippery thereby to need some cautlon in case of wet conditlon, wlth resultant limited applications.
In order to solve these problems, Japanese Paten~
Pu~licatlon No. 50-20962 discloses a technique of manufacturing method of a multicolor tile in whlch a powdery pattern is embedded into a surface of a tile ln a thickness of 3mm. As improved methods of the above technique, Japanese Patent Publlcatlon No 2-42323 shows a manufacturlng method of ceramics provided with an inlald ornamental surface, and Japanese Laid Open Patent Publlcation Nos. 2-239905 and 2-241703 respectively disclose techniques of manufacturlng methods of inlaid tiles. These lnlaying methods can obtain nonglazing tiles having a variety of patterns of a thickness of about 3mm, since they embed prepared patterns into bodies and sinter them.
As mentloned above, the inlald tiles excel, as nonglazed tiles used for pavements or the llke, ln view of varlety of patterns and thickness.
However, it ls lmportant for the inlaying method to control density and shrinkage degree of pattern material , pellets and powders to be embedded as well as compression density of concaves of bodies receiving the embedded materials, in order to get tiles with a precise and elaborate boundary between ~he body and the pattern.
Unless they are not controlled, gaps arise at the boundary.
Generally, the inlaying method needs two or three times of presslng work, so that it has dlsadvanteges of taking a lot of time and labor in making tlles and lncreasing production costs.
In the technique of Publication No. 2-241703t a base tile is preformed at such a pressure as malntalning its shape. Dents are formed at the same time and inlaylng pellets are put and fitted into the dents. Otherwise, separately preformed base tlle pellets and inlaylng pellets 2~0~as~

are arranged in order while the base tile pellets are kept flat, then they are pressed and formed as a whole. The inlaid tlles thus obtained have desired strength by burning, and has no gaps produced at the above mentioned boundary. Moreover, different colors of clay bodies rarely flow on presslng, so that it is posslble to make clear the boundary between inlaid patterns and other areas.
However, the technlque of Publicatoin No. 2-241703 takes a lot of time and labor in making the base tiles having dents. In case the tile is give such a pattern as has a constant width of partltion line at the boundary of the pattern, it is difficult to make the width of the partitlon line constant, so that it is unseemly in view of appearance.
As a manufacturing method of a body provided with a pattern of unfixed shapes of spots, Japanese Patent Publicatlon No. 2-8883 discloses a tile having a bordered pattern of unflxed shapes of spots which is obtalned by arranging and pressing to mold a lump of raw material dusted with color pigment powder or a lump of color raw material dusted with raw material powder in a press die.
However, the technique ls limlted in the pattern of unflxed shapes, so that it is necessary to think out how to arrange the color raw materlal lump or the llke in order to make a uniform pattern.
It is known to mix and knead two colors of clays and slice kneaded body, thereby making such a pattern as an lnk flow. Wlth tlles obtained by this technique, slnce the same color part go through the tile ln the thlckness direction, the pattern ls never va~ished even lf the surface is abraded. However, this technique is ln capable of providing patterns other than ~he above lnk flowlng pattern. Moreover, the tiles are fabrlcated by hand, so that the technique is no good in workability.
Conventionally, ln tiling a corner, angle tiles which are bent according to an angle of the corner are used. The angle tiles are manufactured generally by pressure forming 2 1 ~ 3 of powder raw material. Specl:Eically, lts making method utilizes a press dle which define an angle ~hape of a pressing space between au upper mold and a lower mold of a V-section or an inverted V-section. The powder raw material added wlth a blnder is dlspo3ed on a whole surface of both slopes of the lower mold and a top thereof. Then the materlal ls pressingly formed between the upper and lower molds, thereafter belng burned to obtain produce tiles. Such a technique ls shown in Japanese Utllity Model Publicatlon No. 4-30011 or the llke, for example.
Thus manufactured angle tiles have good appearance and sufficlent corner strength, since they are formed into one body as a whole includlng the corner and have no ~oints.
Still, a surface pattern ls limited lnto a slmple color pattern such as one color pattern or a spotted pattern.
In recent years, there arlse needs for colorful tiles.
Therefore, many kinds of tiles with varlous patterns have been proposed and used. For instance, in addition to the above Publication No. 2-42323, Japanese Patent Publication No. 2-8883 dlscloses a tile having an unfixed pattern which is obtained by arranging and pressingly forming raw material lump of clay body dusted with color pigment powder ln a press die.
~ owevex, as such varlous patterns are made by use of a plane die, the above methods are applicable to flat plate shaped tlles, but it ls hard to apply to the above mentioned angle tiles which are manufactured by use of a press die with lnclined die sur~aces. Therefore, other methods are currently adopted to make up corners uslng tlles having the above color pattern. One method ls to stlck two tiles at rlght angles via an adhesive. Other one is to ~oin two tiles at rlght angles via cement and connect them by use o~ angle members made of a metal, a synthetic resln or the like.
However~ these methods need much labor in practising.
Moreover, lt 1~ possible that a cutting plane is exposed to affect an appearance. There is a fear of abrasion in case 2 ~ 3 3 c~

of connecting through the cement. Thus, large improvement i~ to ba achleved ln m~nufacturing steps ~or tiling, durabllity, an appearance, etc. if angle tlles that has ~arlous pat~erns can be obtained. For that reason, such tlles have been desired in the industry for a long tlme.

SUMMARY OF THE INVENTION
In vlew of the above, it ls an object of the lnventlon to provlde a nonglazed tile having a pattern and a manufacturlng method thereof that ls capable of clearly maklng desired and ~arious pattern3 by slmple steps wlthout any gaps at a boundary, that ls free from fading or disappearing of the patterns and that prevents slip when it gets wet.
It ls another ob~ect of the lnventlon to provlde a tile havlng a pattern and a manufacturing method thereof that has large abrasion resistance whlle having a fixed wldth of partition llne at a boundary of the pattern and that ls excellent in an appearance of the boundary o~ the pattern.
It 1~ a still another ob~ect of the invention to provlde a tlle having a pattern and a manufacturlng method thereof that can easlly make such color patterns as are lmposslble ln a common forming dle for an angle tile and that has a sufficient ccrner strength and high quality ln an appearance.
In accordance with one preferred mode of the inventlon, there ls provlded a tile havlng a pattern that is made by. disposing a plurality of molding materials of dlfferent colors into an ln~lde space of a pre sure forming dle while dlviding them from each other ln a planar dlrectlon of the inside space and whlle having each color of the moldlng materials extend from one slde to an other slde of a thickness direction of the inslde space; presslng and forming integrally the moldlng materials into a molded body in the ln~ide space; and burnlng the molded body.
Preferably, the molding materlals are composed of 2 1 ~

different colors of colored granules fllled in a dlvlded manner ln the inside space; and the molded body is made by pressing and forming integrally the colored granules ln the inside space.
More preferably, a partition means ls disposed in the lnslde space to divide the inside space into a plurality of formlng spaces; and each color of the colored granules are filled in each of the forming spaces.
Preferably, the partition means is a par~itlon wall made of a clay body lnto a predetermlned moisture content, and the partition wall is pressed and formed integrally with the colored granules to make the molded body.
Preferably, the molding materials are blockS
respectlvely prepared before being disposed in the inside space, and the block is made by kneading a raw material ml~ed powder, a pigment and water to prepare a plurality of colored clay bodles of different colors o~ a predetermined moisture content, molding each color of the colored clay bodies lnto a colored base material of a flxed thickness, and Joinlng a plurality of colored base materials of different colors in its ~hlckness directlon lnto one body.
Preferably, the molded body ls made by gatherlng, plling and ~olnlng a plurality of base materials of dlfferent colors, cuttlng the ~oined base materials in the gathering and plling dlrection into a constant wldth thereby maklng the block, and disposing and pre~slng the blocks ln the lnslde space whlle a cutting surface of the block belng faced vertlcally.
Preferably, the base materlal has a bar shape; the block ls made by gathering, twiRtlng and Jolnlng the ba~e materials of different colors; and the molded body ls made by dlsposing the block in the inslde space ln the planar dlrection and pressingly forming the block therein.
Preferably, the molding material comprises a preformed body of a plate shape prepared before belng dlsposed in the pressure forming die; the pressure formlng die compri~es an upper mold and a lower mold definlng a forming space of 2 1 ~ 3 substantlally an angle section therebetween; and the molded body i5 made lnto an angle plate by disposing a pair of preformed bodles on opposite slopes of the lower mold, disposing a joinlng materlal between opposlng end surfaces of the preformed bodles along a corner of the lower mold, and pressing the preformed tile bodies and the ~oinlng material between the upper mold and the lower mold into one body.
In accordance with one preferred mode of the invention, there ls provided a manufacturing method of a tile having a pattern, comprising: a molding material disposing step for disposing a plurality of molding materials of different colors into an inside space of a pressure forming dle while divlding them from each other in a planar direction of the inside space and whlle having each color of the molding materials extends from one side ~ to an other side of a thickness direction of the lnside space; a pressure forming step for pressing and forming integrally the molding materials into a molded body in the inside space; and a burning step for burning the molded body.
Preferably, the molding materials are composed of different colors of colored granules; the molding material disposl~g step is a colored granule filllng step for filling the plural colored granules in a divlded manner in ~he inside space; and the molded body is made by pressing and form~ng integrally the colored granules in the inside space in the pressure formlng step.
More preferably, the method further comprises, before the colored granule filling step, a partition means disposlng step for disposing a partition means in the inside space to divide the inside space lnto a plurality of forming spaces, each color of the colored granules being filled in each of the forming spaces.
Preferably, the partition means is a partl~lon wall molded of a clay body into a predetermined moisture content in a partition wall forming step before the colored 2 ~ 5 3 granule filling step, and the partition wall is pressed and formed integrally with the colored granules in the pressure forming step to make the molded body.
Preferably, the molding materials are blocks respectively prepared before the moldlng material disposing step; and the block is made by a raw material kneading step for kneading a raw material mixed powder, a plgment and water to prepare a plurallty of colored clay bodies of different colors of a predetermined molsture content, a base material moldlng step for molding each color of the colored clay bodies into a colored base material of a fixed thickness, and a ~oining step for ~oining a plurality of colored base materials of different colors in its thickness direction into one body.
Preferably, the ~oinlng step comprises a gathering and piling step for gathering and piling a plurallty of hase materlals of dlfferent colors, and a cuttlng step for cutting the gathered and plled base materlals in the gatherlng and plling dlrection lnto a constant width thereby making the block, and the molded body is made by disposing and pressing the blocks in the inside space whlle a cuttlng surface of the block being faced vertlcally.
Preferably, the base material has a bar shape; the ~oining step is a twlsting step for gathering, twisting and joining the base materlals of different colors lnto the block; and the molded body is made by disposing the block ln the lnslde space ln the planar direction and pressingly formlng the block therein before the pressure formlng step.
Preferably, the molding material comprlses a preformed body of a plate shape prepared ln a preformed body ~ormlng step before the molding materlal dlspo~ing s~ep; the pressure formlng die comprises an upper mold and a lower mold defining a forming space of substantially an angle section therebetween; in the dlsposing step, a palr of preformed bodies are disposed on opposite slopes of the lower mold, and a ~olning material is disposed between opposlng end surfaces of the preformed bodie~ along a 21~$~

corner of the lower mold; and ln the pressure formlng step, the preformed tlle bodles and the Jolnlng materlal are pressed between the upper mold and the lower mold lnto one body, thereby making the molde~d hody of an angle plate shape.
Further ob~ects and advantzlges of the lnventlon wlll be apparent from the following d~escription, reference being had to the accompanying drawlngs, whereln preferred embodiments of the invention are clearly shown.

BRIEF DESCRIPTION OF T~ DRAWINGS
FIG. 1 is a plan view showing one example of a flrst embodiment of a tile having a pattern of the inventlon.
FIG. 2 ls a flowchart showlng manufacturing steps of the ~ir t embodlment of a tile having a pattern of the invention.
FIG. 3 ls a perspectlve view of a partltion plate used ln manufacturlng the first embodiment of a tlle having a pattern of the invention.
FIG. 4 is a ~ectional view of a pressure formlng die showlng a state ~ust after filling a color granule in a color granule filllng step ln FIG. 2.
FIG. 5 is a schematlc view of a device for maklng a color granule used in the color granule filling step of FIG. 2.
FIG. 6 ls a sectional vlew of the pressure forming die showing a state ~ust after fllllng a lining granule in a lining granule fllling step ln FIG. 2.
FIG. 7(a) is a plan vlew showlng a modlflcatlon of the flrst embodlment of a tlle havlng a pattern of the invention.
FIG. 7(b) is a plan view showing another modlfication of the first embodlment of a tile having a pattern of the lnventlon.
FIG. 7(c) is a plan view showing ~till another modiflcation of the flrst embodlment of a tile havlng a pattern of the inventlon.

2 ~

FIG. 7(d) i~ a plan view showing still ano~her modiflcation of the first embodiment of a tile havlng a pattern of the invention.
FIG. 7(e) ls a plan view showing stlll another modlflcation of the flr~t embocliment of a tile havlng 2 pattern of the lnvention.
FIG. 7(f) is a plan vlew showing still another modlfication of the firYt emboaliment of a tlle having a pattern of the lnvention.
FIG.8 is a plan view showing an example of a second embodiment of a tile having a pattern of the lnvention.
FIG. 9 is a flowchart showing manufacturing steps of the second embodiment of a tile having a pattern of the lnventlon.
FIG. 10 i~ a schematic drawing of a contlnuous moldlng machine used in a partition wall forming step of FIG. 9.
FIG. 11 is a perspective VlPw showlng an extruded product molded by the contlnuous moldlng machine of FIG.
10 .
FIG. 12 i~ a perspective view of a part~tion wall obtained by cutting the extruded product of FIG. 10.
FIG. 13 is a perspective view showing a partltion wall stlcking sheet materlal obtained in a partltlon wall sticklng stap of FIG. 9.
FIG. 14 is a sectlonal view of a pressure forming die used in a colored granule filIing step and a llnlng granule filling step of FIG. 9.
FIG. 15 is a plan vlew showlng a filled state of colored granules of FIG. 14.
FIG. 16 iY a sectlonal view showing a nonglazing tile burn~ in a burning step of FIG. 9.
FIG. 17(a) ls a plan view showing an example of a t hlrd embodiment of a tile havlng a pattern of the inventlon.
FIG. 17(b~ is a plan vlew showing a modlfication o~ a third embodlment of a tile havlng a pattern of the inventlon.

2 ~L D ~ 3 FIG. 17~c) is a plan vlew showing a modification of a third embodlment of a tile having a pattern of the invention.
F~G. 17 (d) is a plan view showlng a modiflcation o~ a third embodiment of a tile havlng a pattern of the invention.
FIG. 17te) is a plan view showlng a modificatlon of a third embodiment of a tile havlng a pattern of the lnventlon.
FIG. 17(f) ls a plan view showing a modification of a thlrd embodlment of a tlle having a pattern of the lnvention.
FIG. 18 is a schematlc drawin~ showlng dlagramatically a moldlng of a molded thin plate ln manufacturing the third embodiment of a tlle having a pattern of the lnventlon.
FIG. 19 1Q a perspective view showing the molded thln plate of FIG. 18.
FIG. 20(a) is a schematic view showlng a pressing die of a molded thln plate to be a partltlon wall of the tlle havlng the pattern of FIG. 17(a).
FIG. 20 (b) ls a ~chematlc view showing a presslng dle of a molded thin plate to be a partltion wall of the tile having the pattern of FIG. 17(c).
FIG. 20(c) 15 a schematic vlew showlng a presslng dle of a molded tbin plate to be a partltion wall of the tile havlng the pattern of FIG. 17(d).
FIG. 20(d) ls a schematlc view showing a presslng dle of a molded thin plate to be an inside partitlon wall of the tile havlng the pattern of FIG. 17(e).
FIG. 20(el is a schematic vlew showing a pressing die of a molded thln plate to be an outslde partltion wall of the ~lle havlng the pattern of FIG. 17~e).
FIG. 20(f) ls a schemat.tc vlew showing a presslng die of a molded thin plate t o be a partition wall of the tile havlng the pattern of FIG. 17(f).
FIG. 21 is a plan vlew showing a fllled state of colored granules ln manufacturlng the tile havlng the 21 ~6~S~

pattern of FIG. 17(e) among the thlrd embodiment of tiles of the lnvention.
FIG. 22 is a ~ectional vlew howlng a ~lle havlng a pattern after burnlng ln manufacturing the tlle having the pattern of FIG. 17(e) among the thlrd embodiment of tlles of the lnvention.
FI~. 23 ls a plan view showing a fourth embodiment of a tile havlng a pattern of the lnventlon.
FIG. 24 ls a flowchart showlng manufacturing step~ of the fourth embodlment of a tile having a pattern of the lnvention.
FIG. 25 is a schematlc drawing showlng a forming state in a base material formlng step of FIG. 24.
FIG. 26 is a perspective vlew showing a molded base materlal ln the base materlal forming step of FIG. 24.
FIG. 27 ls a perspectlve view showing a layered body ln a layerlng step of FIG. 24.
FIG. 28 ls a perspectlve vlew showlng a pressing state ln a press forming step of FIG. 24.
~ IG. Z9 ls a plan vlew showlng a flfth embodlment of a tile having a pattern of the lnvention.
FIG. 30 ls a flowchart showlng manufacturing steps of the flfth embodlment of a t~le having a pattern of the lnvention.
FIG. 31 ls a perspectlve vlew showlng a rolllng state ln a rolllng step of FIG. 30.
FIG. 32 ls a p~rspective vlew showing a block cut in a cuttlng step of FIG. 30.
FIG. 33 is a front view showing a cutting plane of the block of FIG. 32.
FIG. 34 is a plan vlew showlng a ~lxth embodiment of a tile having a pattern of the lnventlon.
FIG. 35 is a perspective view showlng round bars durlng manufacturing of the slxth embodiment of a tile havlng a pattern of the invention.
FIG. 36 ls a perspectlve vlew showing a state of gathered round bars durlng manufacturlng of the slxth 2 ~ f3 ~3 embodiment of a tile having a pattern of the invention.
FIG. 37 ls a plan view showing a seventh embodiment of a tile having a pattern of the invention.
FIG. 38 is a a perspective view showins a state of gathered small bars during manufacturing of the seventh embodiment of 8 tile having a pattern of ~he inven~ion.
FIG. 39 iR a plan view showing a eighth embodlment of a tile havlng a pattern of the lnvention.
FIG. 40 is a perspective vlew showing a triangle bar during manufacturing of the eighth embodlment of a tile having a pattern of the invention.
FIG. 41 is a plan view showing a ninth Pmbodiment of a tile having a pattern of the invention.
FIG. 42 ls a flowchart showing manufacturing steps of tiles havlng patterns in nlnth to eleventh embodlments of the invention.
FIG. 43 is a schematic drawlng showlng a continuous molding machine used in a bar molding step of FIG. 42.
FIG. 44 is a perspective view showing bars in the bar molding step of FIG. 42.
FIG. 45 is a schematic drawing showing a twister used ln a twistlng stPp of FIG. 42.
FIG. 46 ls a plan vlew showing twlsted bars twisted in the twlsting step of FIG. 42.
FIG. 47 ls a plan view showing twisted bars arranged ln a die ln a pressure forming step of FIG. 42.
FIG. 48 is a schematic drawing showlng a pressure forming state in the pressure forming step ln FIG. 42.
FIG. 49 ls a plan view showing a tenth embodlment of a tlle having a pattern of the invention.
FIG. SO is a plan vlew showlng twlsted bars in a manufacture of a tenth embodiment of a tile havlng a pattern of the lnventlon.
FIG. 51 is a plan view showing a double-twlsted bar ln a manufacture of a tenth embodlment o~ a tile having a pattern o~ the lnventlon.
FIG. 52 is a plan vlew showing a coiled state o~ a 2 1 ~

double-twlsted bar ln a manufacture of a tenth embodiment of a tile having a pattern of the invention.
FIG. 53 1~ a plan view showing a eleventh embodiment of a tile havlng a pattern of the ~nventlon.
FIG. 54(a~ is a perspective vlew showlng an appearance of an example of an angle tile havlng a colored pattern obtained by twelfth to slxteenth embodlments.
FIG. 54(b) ls a perspectlve view showlng an appearance of a modlficatlon of an angle tile havlng a colored pattern obtalned by the twelfth to slxteenth embodlment-~.
FIG. 54(c) is a persp~ctive view showing an appearance of a modlfication of an angle tlle having a colored pattern obtained by the twelfth to sixteenth embodiments.
FIG. 54(d) 1~ a perspectlve vlew showlng an appearance of a modlficatlon of an angle tile having a colored pattern obtained by the twelfth to sixteenth embodlments.
FIG. 55 ls a flowchart showing manufacturing steps of the twelfth embodiment of an angle tile of the inventlon.
FIGo 56 is a perspective view diagramatlcally showing a plaln tlle pressing machine used in the twelfth embodiment of the lnventlon.
FIG. 57 ls a perqpectlve vlew showing a preformed main plate body made by the plaln tile presslng machine of FIG.
56.
FIG. 58 ls a schematic drawing showlng a bar presslng machine used in the twelfth embodiment of the invention.
FIG. 59 is a perspective view showing a ~oining bar made by the bar pre~sing machine of FIG. 58.
FIG. 60 ls an explanatory drawing of a used state of a pre~sing die of an angle tile presslng machlne used in the twelfth embodiment of the lnvention.
FIG. 61 is a flowchart showing manufacturing steps of the thirteenth embodlment of an angle tlle of the lnventlon.
FIG. 62 ls a perspectlve view showing a preformed main plate body formed in a preformed tile body iormlng step of the thirteenth embodiment of the invention.

FIG. 63~a) ls an explanatory drawlng of a used state of a frame of a pressing dle of an angle tile pressing machine used ln the thirteenth embodiment of the invention.
FIG. 63(b) ls an explanatory drawing of a used state of trimming metal fittings of a pressing die of an angle tile pressing machine used in tlle thirteenth embodiment of the invention.
FIG. 64 is a schema~ic drawing showing an extruder used ln a preformed tlle body forming step and a ~oining bar forming step o~ the fourteenth embodiment of the invention.
FIG. 65 ls a perspective vlew showing a preformed main plate body formed in the preformed tile body formlng step of the fourteenth embodiment of the invention.
FIG. 66 i~ a perspective vlew showlng a ~oinlng bar molded by the extruder of FIG. 64.
FIG. 67 is an explanatory dxawing of a used state of a pressing die of an angle tile presslng machlne used in the fourteenth embodiment of the invention.
FIG. 68 ls an explanatory drawlng of a used state of a pressing die of an angle tlle presslng machine used in the fifteenth embodiment of the inventlon.
FIG. 69 ls an explanatory drawing of a used state of a pressing die of an angle tlle presslng machine used ln the sixteenth embodiment of the invention.
FIG. 70(a) is an explanatory drawlng showlng a modified mode of an arranging manner of materials ln an arranging step of a preformed tlle boy and a ~oining bar in each of the twelfth ~o slxteenth embodlments of the invention.
FIG. 70(b) ls an explanatory drawlng showlng a modlfled mode of an arranglng manner of materials ln an arranging step of a preformed tile body and a ~olnlng bar ln each of the twelfth to sixteenth embodiments of the lnvention.
FIG. 70(c) is an explanatory drawing showing a modified mode of an arranglng manner of materials in an 2 ~ 5 3 arranglng step of a preformed tile boy and joining granules ln each of the twelfth to sixteenth embodiments of the lnvention.
FIG. 70(d) i8 an explanatory drawing showing a modified mode of an arranglng manner of materials in an arranglng step of a preformed t:Lle boy and joining granules in each of the twelfth to sixteenth embodiments of the inventlon.
FIG. 70(e) is an explanatory drawing showing a modified mode of an arranging manner of materials in an arranging step of a preformed tile boy and joining granules in each of the twelfth to sixteenth embodiments of the inventlon.
FIG. 70(f) is an explanatory drawing showlng a modified mode of an arranging manner of materials ln an arranging step of a preformed tile boy and joining granules in each of the twelfth to sixteenth embodiments of the invention.
FIG. 71 is a perspectlve view of a seventeenth embodiment of an angle tile of the lnvention.
FIG. 72 is a sectlonal view of a pressure forming machlne showing a process of filling colored granules in a pressure forming die in a preformed tile body forming step.
FIG. 73 is a perspective view of a partitlon plate used in filling the colored granules in the pressure forming die in the preformed tlle body forming step.
FIG. 74(a) is a perspective view of a long preformed tile body formed in the preformed tlle body forming step.
FIG. 74(b) ls a perspective view of a short preformed tile body formed in the preformed tile body forming step.
FIG. 75 is a partlal perspective view of a ~oinlny bar formed in a joining bar forming step.
FIG. 76 is a sectional view of an angle tile pressing die showing a state in a preformed tlle body and ~olnlng bar disposing step.
FIG. 77 1s a perspective view of an eighteenth embodiment of an angle tile of the invention.

2 1 ~

~ IG. 78 is a sectional vlew of a pressure foxmlng machine showing a process of filllng colored granules ln a pressure forming dle in a preformed tlle body formlng step.
FIG. 79 is a perspective view of a partltion plate used ln fllling the colored granules in the pressure forming dle in the preformed til~e body forming step.
FIG. 80 ls a perspective view of a preformed tlle body formed in the preformed tlle body forming step.
FIG. 81 is a sectional view of an angle tile pressing die showing a state in a preformed tlle body and joining bar dlsposing step.
FIG. 82ta) is a p~rspective view showing a modification of sllp preventing lugs.
FIG. 82(b) is a perspectlve view showing another modification of sllp preventlng lugs.
FIG. 82(c) ls a perspective view showing still another modification of sllp preventlng lugs.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings, wherein like reference characters designate like or corresponding parts throughout the several vlews, several preferred modes of the lnventlon wlll be described hereafter.

[ FI RS T EM~ODIMENT]
A first embodlment of the inventlon will be descrlbed hereunder referrlng to FIGs. 1 to 6.
Referrlng to FIG. 1, a tlle having a pattern 81 ls a nonglazlng tlle of a dimenslon of 100mm square. The pattern ls composed of a light black part 82 provided at an slde part and a light red part 83 provided at an inslde clrcular part. The llght black part 82 and the llght red part 83 are made of the same raw material but mixed with dlfferent pigments. They are burnt lnto one body. A
llning layer 1~ formed on a rear part (not shown) of the tile 81.
The tlle 81 was manufactured as ~ollows. FI~. 2 show~

2 1 ~ 3 manufacturing steps.
Flrs~, ln a partition plate di~po~lng step S501, a partition plate 84 as a partitlon means ~hown ln FIG. 3 is fabrlcated of a thin steel plate of a thlckness of approxlmately lmm ln such a manner to correspond to the pattern of the tlle 81. This partition plate 84 ls composed of a center partition 85 and an outer wall 86 formed ln one body. The center partitlon 85 is a ring plate shape wlth a height of 10 to 12mm and constitutes a border of multicolors. The outer wall 86 is a rectangular frame shape wlth the same helght of 10 to 12mm and is contacted wlth an inside wall of a pres~ure forming die descrlbed later. A handle 87 is attached to an upper end of the partltlon plate 84. The outer wall 86 i9 provided for a purpose of holding the c~nter plate 85 at a flxed positlon, but lt may be omitted and only the inslde center plate 85 may be disposed in the die according to a formed pattern. The thlckness of the partition plate 84 is preferably made thln in order to make the border as distinct as possible. Still, lf it is too thln, it would be easlly deformed in works of l~s disposing and taklng-ollt or filling of granules mentioned later. Thus, it is necessary to determine the thickness in consideratlon thereof. It ls possible to chamfer a lower end of the partition plate 84 into a tapered shape.
After the partltlon plate 84 was fabricated, it was dlsposed on a bottom surface of a pressure forming die 91 shown in FIG. 4.
On the other hand, in a colored granule filling step S502, colored granules were prepared for forming a colored part. For the preparation of the colored granules, a tile ~ody con~lsting of 50% feldspar, 20% china clay and 30~
clay was added with 2% black pigment for kneading, 0.5~ CMC
and water. This tile body was then mlxed and ground in a trommel 101 ~hown in ln FIG. 5 thereby to obtain a Ylip 102. Thereafter, it was pumped up to a spray drler 104 by a pump 103, and dried and granulated by the spray drier 104 .

2 1 ~ 3 to obtain the colored granules. This llght black colored granules was s~ored ln a storage/feed tank 105. Simllarly, the above tlle body was added with 3% of a red pigment for kneadlng thereby to obtain light red colored granules by a simllar operation. The light red colored granules were stored ln another storage/feed tank 106. ~hese two klnds of granules had their molsture content regulated in about 7% by controlling drying conditlon. A raw materlal supplylng means used ln the colored granules fllling ~tep S502 may dlrectly supply the raw materlal from a measuring means or supply them evenly over a flxed wlde area by a robot or the llke.
After such preparatlon, the llght black granules and the llght red granules were filled into the pressure forming dle 91 whlch had the partition plate 84 dlsposed therein. In thls filling work, the light black granules were filled to a height of 7 to 8mm, by use of a feeder not shown, ln an outer formlng space 95 that was surrounded by the center partition 85 and the outer wall 86 of the partition plate 84, among a formlng space 10 to 12mm deep defined by a lower mold 93 and a side mold 94, while an upper mold 92 was kept raised in the pressure forming die 91 of FIG. 4. At thls time, care was taken of so that the llght black granules aia not lntrude into an inner forming space 96. When they intruded, they were sucked and elimlnated.
Next, the llght red granules were filled into the lnner formlng space 96 to a height of 7 to 8mm in the same manner as the light black granules. Here, the light red granules may reversely be fllled prior to fllling of the light black granules, or they may be filled at the same time.
After the colored granules were fillsd, in a partitlon plate removlng step S503, the partltion plate 84 were removed by taking the handle 87 which was attached to the upper end of the outer wall 86. Thereby, the light black granules and the light red granules overflowed the border 2 1 ~

to each other and were mixed ln a very ~mall amount. If the colored granules overflow to each other and are mixed, a ~olning strength is improved between the dlfferent colored granules, though the border is made slightly indlstlnct.
In a llnlng granule fllling step S50A, on the other hand, linlng granules as uncolored body grains were prepared ln the same manner as the colored granules, by use of the ~ame tile body as that of the light black and red granules, wlthout any pigment added. They were stored in a storage/feed tank 107. Then as shown in FIG. 6, the lininy granules were filled lnto a llning granule forming space 97 whlch was defined over the fllled llght black and red granules, to the same height as an upper surface of ths slde mold 94.
Next, in a pressure ~orming step S505, each klnd of the colored granules and the llning granules in the pressure forming dle 91 were pressed and molded at a pressure of lOOkg/cm2. At this time, though not shown lllustratively, lf a pressing surface of a bottom part of the l-pper mold 92 1~ given concaves and convexes of a flxed wldth, it ls posslble to form concavo-convex ribs or protrusions for heightenlng an aahering strength at the same time on the rear surface o~ the tile 81.
Thereafter, ln a burning step S506, a block which was molded ln the pressure forming step S505 was turned over, and burnt under a condition of a burniny temperature of 1250~ and a burning tlme of 30 hours. The 6 to 7mm thick nonglazing tlle 81 was obtalned, by burning, as shown ln FIG. 1 which had a pattern of the llght black part 82 and the llght red part 83 at the front side while llned by uncolored porcelain at the rear slde.
As mentloned above, thls embodiment of the tile 1~
obtalned by: d:Lsposing the partitlon plate 84 in the pressure forming die 91; then fllling the llght black granules and the llght red granules respectively in the outer formlng space 95 and the lnner forming space 96 both 2 1 ~ 3 deflned by the partition plate 84; removing the partitlon plate 84 and then filling the linlng granules over the fllled colored granules; pressing and molding them lnto one body; and burning them.
Accordlng to this embodiment, since the partl~ion plate 84 is disposed beforehand in the pressure forming dle 91 so as to fill the colored granules in the forming spaces 95, 96 and the llning granules are filled and pressed after removal of the partition plate B4, it is possible to easily form a multicolored pattern and improve a joining property between the light black granules and the light red granules, thereby preventing the border part from being peeled off and cracked, though the border line is made slightly indistinct lf a very small amount of the colored granules overflow the border at the time of pressing.
Moreover, the pattern is never faded or vanished, thus exhibitlng the same pattern as the initial one, even if the tile surface is abraded with long tlme of use.
Furthermors, the lining granules are ~oined to bo~h the colored granules so as to also enlarge the joining strength between them. The lining granules are fllled ln each forming space so as to flat a filled surface of the colored granules that is apt to become irregular, thereby making it easy to standardize the tile thlckness.
In addition, since both the colored granules and the lining granules are filled, pressed and thereafter burnt, it is posslble to improve an overall strength and a surface hardness, thereby preventing abrasion of the tile surface.
Moreover, both the colored granules dried are good in fluldlty ln filling, and easy to handle or suitable for mass production.
While the above embodlment uses the uncolored lining granules in addition to the two colored granules, one of the colored granules may be used for the liner. That is, after one of the two colored granules are fllled ln one of the formlng spaces 95, 96, the other colored granules are filled wholly up to the lining granule forming space 97.

2 ~ 3~

This make material control easy. Moreover, the linlng granules may be obtalned by granulating sewage disposal waste soll, waste tile material or the like. In this case, it is po~slble to manufacture the tile at low cost~, whlch wlll serve for waste dlsposal and contribute to recycle of resources.
The above embodiment of the manufacturlng method of the tlle having the pattern is composed of: the partition plate disposlng ~tep S501 for disposing the partitlon plate 84 ln the pressure formlng die 91; the colored granule filling step S502 for filling the llght black granules and the light red granules respectively in the outer forming space 95 and the inner forming space 96 both defined by the partltion plate 84 after disposing the partitlon plate 84;
the partition plate removlng step S503 for removlng the partitlon plate 84 out of the pressure forming die 91 after fllllng the colored granules; the lining granule fllllng step S504 for filling the llning granules over both the filled colored granule~s the pressure forming step S505 for pressing and forming the colored granules and the llnlng granules ln the pressure forminy die 91 into one body after fllllng both the colored granules and the llnlng granules in the pressure forming dle 91; and the burning step S506 for burning the block molded in the pressure forming die 91 .
According to the above method, slnce the colored granules are fllled ln the formlng spaces 95, 96 after dlsposlng the partltlon plate 84 ln the pressure formlng dle 91 and t~en the llnlng granules are fllled therein, the pattern of the tile can be made with an easy operatlon, and dlfferent colors of granules can be fllled slmultaneously.
Here, the colored granules used in manufacturlng the present embodlment of the tile are preferably obtained by:
uslng the same materials as ordinary tlles like feldspar, china clay, kaolin, clay, etc.; adding coloring pigments, organic caklng agent, water thereto; mixing and grinding them lnto sllp by a trommel or the like; and pelletizing 2 1 ~ 3 them into a flxed molsture content by a spray dxler or the llke. The particle diameter 13 preferably 20-50 meshes.
Moreover, the colored granules may be used in a powdered state without pelletlzing process. Stlll, the pelletlzed granules of a fixed moisture content are good in workablllty and suitable for mass production. This i9 because advantageously they have no lrregular color and are unsticky and spread entirely over the pressure formlng dle 91 .
The colorlng pigment may be such pigments for kneadlng as chromium oxlde, lron oxlde and Mn-Al pink, in addltion to such natural pigments as chromite and loess.
Preferably, an adding amount thereof is generally two to three percent.
Moreover, lt is best for the llnlng granules to use the same granulated gralns as the colored granules in view of a Jolnlng strength and a shrlnkage percentage, since one ob~ect of the lnventlon 1 to relnforce the joined part of the colored granules of the tile surface correspondlng to the partltlon plate 84 and prevent lts crazlng. However, since the llnlng granules do not appear on the tile in a normal US8, other materlal may be utllized as long as the ~oinlng strength and the shrlnkage percentage can be regulated. For example, it ls possible to use a material that i5 obtained by mixing re~uses, such as crashed flne powders oP tile waste and drled waste soil powder of sewage dl~po al, as a maln materlal wlth slllca or the like, and ad~ustlng a melting polnt and a shrinkage percentage. This makes recycle of resources posslble.
It ls preferable to use a cellulose ether such as MC
tmPthYl cellulose), CMC (carboxymethyl cellulose sodium~, ethyl cellulose and benzyl cellulose, or a synthetic resln.
The flrlng or burning after pressure molding may be performed correspondlngly to a manu~acturlng conditlon of general nonglazing tlles. Here, lt ls posslble to give luster to the fired tll~ by properly poll~hing its surface.
Whlle, ln the above embodlment, the lining granules 2 ~ 5 ~

are fllled together wlth the colored granules, lt ls po3~1ble ~o ellmlnate the ~llllng o~ the lining granules.
In case of elimlnating the filllng of the llning granules, materlal control ls made easy, ~nd manufacturing ~teps are simplified.
Whlle, in the above embodiment, the llning granule~
are filled over the colored granules after fllllng of the rolored ones, the order of fllllng work may be changed.
Namely, the colored granules may be filled over the llnlng granules after fllllng the linlng granules. In this case, the partitlon plate 84 ls to be dlsposed on the lining granules which were filled beforehand ln the pressure formlng dle 91. Accordingly, lt is unnecessary to closel~
contact the lower end of the partition plate 84 wlth the surface of the pressure formlng die 91 in a unlform manner, so that the partitlon plate 84 may be fabrlcated without speclal care for accuracy at the lower end.
Whlle the above embodlment of the tile 81 has the pattern that a circle ls formed ln a square frame, deslred patterns may be given to varlous shapes o~ tlles, such as a rectangular tile 81a shown ln FIG. 7(a), a rectangular tlle 81b shown ln FIG. 7~bl, a rectangular tlle 81c shown ln FIG. 7(c), a rectangular tlle 81d shown ln FIG. 7(d), a hexagonal tile shown ln FIG. 7(e), and a circular tlle 81f shown in FIG. 7(f). For example, ln the tile 81c of FIG.
7(c), a pattern ls defined by a white part and a spotted part that is made of a body wlth blue granules dispersed.
The tile 81d of FIG. 7td) has a pattern defined by three colors.
The partitlon plate may make its pattern forming lower end or all the part thinner or thlcker than the above embodlme~t. Thlnner one prevents breakage of the pattern ln removlng the partltlon plate. Thlcker one makes an outllne o~ the pattern lndlstlnct thereby exhlbitlng a unlque appearance. Moreover, it is pos~lble to use part of a pressure formlng die as a substltute for an outer wall of a partltion plate, which forms an outer part of a tlle, 50 21~ a3 as to ellminate the outer wall and simpllfy its constructlon.

[ SECOND EMBODIMENT ~
A second embodlment will be described hereunder referring to FIGs. 8 to 16.
Referring to FIG. 8, a tile havlng a pattern 111 ls a nonglazing tlle of a dimenslon of 200mm square. The pattern is formed by an outer light black part 113 and an inner llght red part 114 wlth a white rlng part 112 of a constant width of 6mm borderlng them. All of these white ring part 112, llght black part 113 and light red part 114 are made of the ~ame raw materlal and burnt lnto one body.
However, they have respectively different plgments mixPd thereln and show different colors. A llning layer ls formed on a rear side thereof (not shown).
Manufacturlng steps of the tile 111 is described hereafter referring to FIG. 9.
Flrst, in a partitlon wall forming step S511, a tile body conslsting of 50~ feldspar, 20% china clay and 30%
clay was added with 10% zirconium sillcate, namely superfine powders of zlrcon as a white pigment, 1~ CMC and 25~ water. Then, they were pu~ lnto and mixed in a mixer 122 of a contlnuous moldlng machine 121 which was composed of the mixer 122, a kneader 123 and an extruder 124, and sufficiently kneaded by the kneader 1~3 thereby preparlng a clay body for a partition wall 132. Thereafter, a cyllndrical molded body 131 shown in FIG. 11 was obtalned through a mouthpiece 125 by use of the extruder 124. Next, this cyllndrical molded body 131 was cut into a 15mm length, and drled a predetermined tlme at a temperature not more than 200~ by a drier. Thus, most of moisture of the cyllndrlcal molded body 131 was evaporated thexeby to obtaln the rlng partltion wall 1~2 shown ln FIG. 12 whlch has 7~ moisture content and an outer dlameter of 200mm and a thlckness of 6mm.
Next, ln a partltion wall sticking step S512, an organic adheslve known ln the art was coated on one cut surface of the partition wall 132 as a partition means obtalned in the step S511. Such a partition wall 132 was put on and stuck to a prede~e:rmlned position o~ a sheet material 133 of Japanese paper whlch is the same dlmension as an lnslde dimension of a bottom surface of a presqure forming die 91, which was similar to that of the first embodiment. Then, the sheet material 133 with the partltlon wall 132 stuck thereto, as shown in FIG. 13, was lald on the bottom surface of the pressure forming die.
Here, an lnner dimenslon of the pressure ~orming die 91 was 210mm square.
On the other hand, in a colored gxanule filling step S513, colored granules for forming a colored part were prepared, separately from the partition wall 132. The preparation of the colored granules was carried out in the same manner as the first embodiment, by use of the device shown in FIG. 5.
After ~uch preparation, light black granules and light red granules were filled in the pressure formlng die 91 that accommodated the sheet materlal 133 with the partltlon wall 132 ~tuck thereto. In thiR filling work, the upper mold 92 of the pressure formlng die 91 was kept raised as shown in FIG. 14. Then, the llght black granules were filled, by use of a feeder (not shown), lnto the outer formlng space 95 which was surrounded by the pressure forming dle 91, the ring partition wall 132 and the underlylng sheet material 133, among the forming space~
deflned by the lower mold 93 and the slde mold 94, up to such a height as an upper end of the partit~on wall 132 was not hidden. At thls tlme, a care was paid for so that ~he llght black granules did not o~erflow into the inner formlng space 96 formed by the partitlon wall 132 and the sheet materlal 133. Any ones whlch were erroneously overflowed thereinto were sucked and ellminated.
Next, the light red granules were filled into the inner formlng space 96 up to such a helght as the upper end 2 1 ~

of the partltion wall 132 was not hldden, a~ in the light black granules. A state after filling is shown ln FIG. 15.
Regardlng the fllllng works o~ the llght black and red granules, contrary to the above, the red ones may be filled first as in the first embodlment, or both of them may be fllled at the same tlme.
After the light black and red granules were fllled ln the formlng spaces 95, 96 of the pressure forming dle 91, ln a llning granule fllling step S514, linlng granules as uncolored body gralns were prepared ln the same manner as the flrst embodlment, and stored ln the storage/feed tank 107 for the llnlng granules shown ln FIG. 5. Then, these linlng granules were filled lnto the llning granule forming space 97 from over the already filled light black and red granules up to a height twice that of the partitlon wall 132, namely a helght of 25 to 30mm.
Next, ln a pressure forming ~tep S515, each color of granules and the llning ~ranules ln the pressure forming die 91 were pressed and formea at a pre~sure of lOOkg/cm2.
Thereafter, in a burnlng step S516, a block formed in the pressure forming step S515 was turned over, and burnt under a condition of a burnlng temperature o~ 1250~ and a burning tlme of 30 hours. A nongla~lng tile 111 of a section shown in FIG. 16 was obtained by burnlng. As to an appearance, the tile 111 has its front side design surface formed with a pattern which ls composed of an lnner light black part 113, an outer light red part 114 and a white ring part 112 bordering them, and its rear side lined by the uncolored porcelain, as shown in FIG. 8.
Here, the heet matertal 133 of Japanese paper ls burnt out by hlgh temperature heat in the above burnlng. A
plastlc sheet or the llke may be used as the sheet material 133. However, a common European paper needs some attention slnce residue is left after burning.
As mentioned above, the second embodimznt of the tile ls obtained by: forming the partition wall 132 of a fixed moisture content from a clay body and dlsposlng it in the 2~3~

pressure molding dle 91; ~hen filllng the light black granule~ and the light red granules in the outer forming space 95 and the lnner formlng space 96 both deflned by the par~ltion wall 132; thereafter i'illlng the llnlng granules over the filled colored granules to press and mold into one body; and burnlng them.
Accordlng to thls embodiment, slnce the partltlon wall 132 is disposed beforehand in the pressure formlng dle 91 so as to deflne the forming spaces 95, 96 for the colored granules, the partitlon wall 132 ~unctions as a shieldlng wall in the pres~lng step. Thus, it ls prevented that the colored granules overflow the border, thereby maklng the pattern di tlnct. Moreover, slnce th~ llnlng granules are filled over the colored granules and pressed lntegrally therewith, the border part between the partltion wall 132 and the colored granules i5 glven a sufficlent ~oining strength. As a result, the border part of the pattern can be restralned from cracking or the like. Moreover, since the colored granules and the lining granules are fllled, pressed and molded, and flred thereafter, an overall strength and a surface hardne~s are lmproved. ~hereby, the tile i~ prevented from abrasion at the surface as well as dixt or stain at thP border part.
In additlon, slnce multlcolored patterns can be provlded on one plece of tlle, many klnds of patternlngs can be reallzed, though conventional technique ls only capable of formlng such a slmple pattern as a diced pattern ln splte of a trend of these days in whlch a size of one tile piece has been becomlng larger such as 200mm square or 300mm square.
~ ere, the llning granule~ may be the same color as that of one of the colored granules as in the first embodiment. The lining granules may be obtalned by granulatlng sewage disposal waste soil, waste tlle materlal or the llke.
The above second embodlment of the manufacturlng method of the tlle havlng the pattern ls composed of: the 2 1 ~ 3 partltlon wall formlng step S511 for forming the partition wall 132 of a predetermined moisture con~ent from a clay body; the partition wall sticking step S512 for sticking the formed partltion wall 132 to the sheet material 133 of the same dlmension as that of the bottom surface ln the pressure formlng dle 91 whlle belng standed; the colored granule filling step S513 for disposing the sheet material 133, to whlch the partition wall 132 has been stuck, ln the pressure forming die 91 and fllling the light black granules and the light red granules respectlvely ln the outer formlng space 95 and the lnner forming space 96 both defined by the partition wall 132; the llnlng granule filllng step S514 for filling ths lining granules over the partitlon wall 132 and the upper surface of both the fllled colored granules; the pressure forming step S515 for pressing and forming the partltlon wall 132, the colored granules and the lining granules ln the pressure forming dle 91 lnto one body; and the burning step S516 for burning the pressea and formed block and burning out the sheet materlal 133 by the heat.
According to the above method, since the colored granules and the llnlng granules are filled ln the formlng spaces 95, 96, 97 after disposlng the partition wall 132 in the pressure forming die 91, a desired distinct pattern can be glven to the tile wlth an easy operation, and different colors of granules can be filled simultaneously. Slnce each color of the granules that has been dried into a fixed moisture content has a good fluidity at the time of filllng, so that they are ea~y to handle and sultable for mass production.
Furthermore, slnce the sheet materlal 133 that i9 as large as the ~ottom surface of the pressure forming dle 91 ls disposed in the pressure forming die 91, while havlng the molded partltion wall 132 stuck ln a standed state thereto, the colored granules are blocked by the sheet materlal 132 from going over the border part in the dle 91 at the time of presslng. Thus, the border part of the 2~ 3~

pattern can be more distinct. Inasmuch as the sheet material 133 for sticking the partition wall 132 is made of Japanese paper as a combusting material, it is burnt out at the time of burning after pressing, so that lt ne~er affects an appearance of tile surface nor material property of the tlle after burning.

[THIRD EMBODIMENTl Next, a third embodiment of the inventlon will be described referring to FIGs. 17(a) to 22.
The third embodiment shows tlles of relatively small dlmenslon such as 100mm square or 150mm square while having patterns illustrated in FIG. 17(a) to FIG. 17(f).
FIG. 17(a) to FIG. 17(f) show six kinds of tiles 141a, 141b, 141c, 141d, 141e, 141f respectively having different patterns. The tiles 141a-141f are nonglazing tiles of approximately 100mm square or an outer dimension smaller than that of the tlle 111 in the second embodlment. The tiles 141a, 141b, 141c, 141d, 141f have patterns that dark brown parts 143a, 143b, 143c, 143d, 143f and green parts 144a, 144b, 144c, 144d, 144f are disposed at opposlte sides o~ whlte border part 142a, 142b, 142c, 142d, 142f. The tlle 141e has a pattern that a dark brown part 143e, a green part 1~4e or a yellow part 145e are disposed at opposite sides of a white border part 142e. The whlte border part 142a-142f is approxlmately 3mm wide which ls narrower than the white rlng part 112 approximately 7mm wide in the second embodlment, slnce the tlle 141a-141f has a smaller outer dlmension.
Hereunder, manufacturing steps of the third embodiment of a tile will be descrlbed referring to the tlle 141e of FIG. 17(e) as an example.
Regarding the third embodiment of the tlle 141a-141f, the white border part 142a-142f that has a small wldth of about 3mm i5 preferably formed by use of a pressing dle, ln order to make its handling in the following steps easier.
The third embodiment is the same as the second 3 JI ~

embodlment in other operations such a~ preparation of colored granules and lining granules, thelr filllng into a pressure formlng dle, pressing and forming, and burntng.
First, a tlle body consl~ting of 50% feldspar, 20%
chlna clay and 30~ clay was ~dded wlth 5% tltanium oxlde, 1~ CMC and 25~ water. Then, they were mlxed and kneaded into a clay body 151, and the clay body 151 was molded by a double stage mlll 152 shown ln FIG. 18 thereby to obtaln a molded thln plate 153 250mm wide, 3mm thick and lOOOmm long as shown in FIG. 19.
Thereafter, a little amount of titanium white was sprlnkled over a surface of the molded thin plate 153 that had been laid on a base. Then, such molded thln plate 153 was cut, along longltudinally extending cuttlng llnes shown by two-dotted chaln lines in FIG. 19, into 7mm wlde strlps.
These strips were gently wound.
A whlte molded strlp cut into 7mm wldth had lts one end posltloned at one end of a lower mold 163d, 163e whlle an upper mold 162d, 162e was kept ralsed. A pressing dle 161d, 161e was used for fabricatlng the tlle 141e of lOOmm square as shown ln FIG. 20(d) and FIG. 20(e). Then, the upper mold 162d, 162e was lowered to pre~s the strlp.
~hereafter, the whlte molded ~trip had lts other end cut off, lf such end was out of the pressing die 161d, 161e.
The tile 141e of FIG. 17(e) ls manufactured by use of two smaller white strlps and two larger white strips, whlch are presslngly molded by the pressing die 161d of FIG. 20(d) and the presslng dle 161e of FIG. 20(e), re~pectlvely.
The tlle 141a of FIG. 17(a) can be fabricated by use of a whlte molded strip formed by a presslng dle 161a of FIG. 20(a). The tile 141c of FIG. 17(c) can be fabricated by use of two white molded strlps formed by a presslng die 161b of FIG. 20(b). ~he tile 141d of FIG. 17(d) can be fabrlcated by use of two whlte molded strlps formed by a presslng dle 161c of FIG. 20~c). The tlle 141f of FIG.
17(f) can be fabrlcated by use of four white molded strlps formed by a presslng die 161f of FIG. 20(f).

2~ 3 The whlte strips molded by the presslng die 161d of FIG. 20 ~d) and ~he pres31ng die 161e of FIG. 20 (e) were dried at a ~emperature of not more than 200~ into 7 molsture content. Two small strlps and two large strips were used and mutually ~olned by coatlng an organlc adheslve on a ~olnt surface, thlsreby formlng one partitlon wall 171 shown in FIG. 21.
Next, an organlc adheslve was coated on a bottom surface o~ the partition wall 171, and the partltlon wall 171 was stuck to such a sheet material as a Japanese paper or a plastlc sheet, and disposed ln a pressure formlng dle.
On the other hand, in addltlon to the above operatlon, three tlle bodles each conslstlng of 50~ feldspar, 20~
chlna clay and 30~ clay were added respectlvely and separately with kneadlng plgments of dark brown, green and yellow. CMC and water were ~urther added to each tile body. Then, each o~ them was mlxed, crashed and made into a sllp by the same operatlons as each color of granules ln the second embodiment, and dried and pelletized by the spray drier 104. Thereby, brown colored granulesj green colored granules and yellow colored granules were prepared.
Thereafter, the three colors of the granules prepared beforehand as above were fllled one by one lnto formlng spaces deflned by the pressure formlng die, the partltlon wall 171 and the sheet materlal, from the inside to the outslde. Then, uncolored llnlng granules were fllled over these three colored granule~. FIG. 21 shows their fllllng ~tate ln the pressure forming dle. In FIG. 21, the innermost ls yellow granules, the center ls green granules, and the outermost is dark brown granules.
After thls, they were pressed and formed into a block by the same operatlon as the sseond embodiment. Such a pressed block was flred to obtaln the tile 141e approximately 10mm thlck shown ln FIG. 17(e) and FIG. 22.
That is, the third embodlment i9 dlfferent from the second embodlment ln the formlng proces~ of the partitlon wall.

2 ~ 3 Here, in the second and thlrd embodlments, a partition wall may be obtained by: usinq the same raw material as that of common tiles such as feldspar, chlna clay, kaolin, clay or the llke; adding thereto a pigment, an organic caking agent and water to prepare a kneaded clay body;
forming the clay body by means of extrusion, roller moldlng or the like; cutting it into a constant wldth; and drylng it into a predetermined molsture content. The moisture content is preferably a value substantially the same~ as that of the colored granules, and more preferably 6 to 8%
from experlence. It is possible to use similar materials to those of the first embodiment, as colored granules, lining granules, pigments, and organic caking agents. The burnlng work may be done according to a manufacturl~g condit~on of general nonglazlng tiles, as in the first embodiment.
While, ln the second and thlrd embodlment, the partition wall is disposed in the pressure forming die after being stuck to the sheet materlal like a Japanese paper or a plastlc sheet, and then the colored granules are filled into the pressure forming die, other modlflcatlons are posslble For instance, the partition wall may be disposed directly ln the pressure forming die without use of the sheet material. However, it may be caused in this case that the colored granules flow into between the partition wall and the bottom surface of the die thereby to make the pattern of the border part slightly indistinct, at the time of filllng the colored granules in the die.
Therefore, it is preferable to use the sheet material in case there is a problem in a finished article due to a grain diameter and fluidity of filled colored granules, a degree of flatness of the bottom surface of the partition wall or the like.
While the above embodlments of the partition walls are made lnto a constant width of 3mm or 7mm, othex shapes may be adopted. For example, it may have a wldth change such as an expanded part provided at some position. In this - 3~ -2 ~ 5 ~

case, it iS po~sible to give a di~erent ~eellng to the pattern compared with that of each o~ the above embodlments.
Moreover, ln the above embodiments, each of the partition walls may make its surface roughness of a side wall coarse or into a concavo-convex surface or formed with an undercut. In this case, it ls possible to make the ~olnlng strength larger b~tween the partltion wall and the colored granules, thereby restralning more effectlvely cracks or crazes from belng caus~d at the Jolned surface.
In addltlon, the above second and thlrd embodlments of the partitlon walls may be the same color a~ one of the colorPd granules thereby to obtaln a pattern wlth a border line havlng no wldth.

IFOURTH EMBODIMENTI
A fourth embodiment of the lnventlon wlll be descrlbed hereunder, referring to FIGs. 23 to 28. A tlle havlng a stripe pattern is illustrated as an example.
Referrlng to FIG. 23, a tile 181 has a strlpe pattPrn.
The pattern may be formed by whltlsh parts 181a and blacklsh parts 181b, for example. The whltish part 181a and the blackish part 181b respectlvely go through the tlle 181 in a thickness dlrection with a constant sectional area, o that, if the tlle 181 ls sliced at any plane parallel to a ~ront surface, the same pattern as the front surface appears at all tlmes.
Next, manufacturlng steps of thls tlle wlll be descrlbed referring to FIG. 24.
In manufacturlng the tlle 1~1, flrst, ln a raw material kneading step S521, two klnds of raw material mixed powders were prepared: raw material mlxed powders obtalned by blendlng 50~ feldspar, 20~ chlna clay, 10%
kaolin and 20~ clay; and colored raw materlal mixed powder obtalned by addlng 2% chromlte pigment powders to a body of the same composltion as the above raw materlal mlxed powder. Each of the raw material mixed powders was added 2 1 ~

wlth 20~ water and kneaded sufflclently by a kneader.
Thereby, two kinds of clay bodies 182 were prepared. Here, the flrst raw material mlxed powders as a body havlng the above composition are made into a whitlsh color after burnlng, while the colored raw materlal mixed powderR
further added wlth the chromlte pigment powders are made lnto a blackish color.
Next, ln a base materlal moldlng step S522, each of the clay bodles 182 kneaded ln the step S521 was molded lnto a plate 184 200mm wlde, 500mm long and 8mm thick, a~
shown in FIG. 26, by use of a double stage mill 183 shown ln FIG. 25.
Then, in an adhesive coating step S523, an adheslve was coated on a ~olnt surface o~ the plate 184 by a known method llke spraying, brushlng, etc. Thereafter, ln a layering step S524, whltlsh plates 184a and blackish plate 184b were plled up one after another, such as black, whlte, black, white and black, lnto five layers and sllghtly pushed on each other as a whole to form a layered body 185.
The layered body 185 is about 40mm hlgh.
After the above preload, ln a cuttlng step S525, the layered body 185 composed of flve layers of the plates 184 had its surface provlded wlth cut lines by a plano wlre at 40mm lntervals and was cut off vertlcally. Each 40mm wlde layered body was further cut ln its length dlrectlon at 15mm lntervals, thereby obtalning blocks 186. The dimension of this block 186 1s abouf 40mmX40mmX15mm. The two-dot chain llnes ln FIG. 27 show the cut llnes on the surface of the layered body 185 and a cutting line for a unlt of block 186.
Next, in a pressure forming step S526, as shown ln FIG. 28, four cut blocks 186 were placed with lts opposite surfaceR ln the thlcknesR dlrectlon disposed at the upslde and the downslde ln a pressure forming dish 187, whlch was 85mm square and constltuted a pressure forming die, so that strlpes made by the five layered square pattern were crossed each other. Then, the pressure ~ormlng dlsh 187 2 1 ~ 3 was loaded in~o a pre3slng machine and the blocks 186 were pressed at a pressure o~ 50kg/cm2 thereby to obtaln a pressed block.
Thereafter, ln a drying and burnlng step S527, the pressed block compoqed o~ the four bloc~s 186 wlth their strlpes crossed was dried at a temperature of 200~, and then burned 30 hours at a temperature of 1200~. Thus, the nonglazlng ~lle 181 of 75mm squa:rP was obtained whlch had a pattern composed of five layers of black and whlte strlpes.
The pressed block of 85mm square contracted into 75mm square.
While, ln thi~ embodiment, the dlmension of the block 186 ls 40mm square, 1t may be set into a desired dimenslon such as 20mm square or 80mm ~uare. In this caRe, lt ls necessary to approprlately choose the number of layers or a thickness of the plate 184 or the like according to a dimenslon of a finished tlle. For example, ~he thlckness of the block 186 obtained by cutting vertically the layered body 185 needs to be approximately twlce as large as that of the flnlshed tlle. A tlle of 75mm square needs to be about 15mm thick. A tlle of 150mm square needR to be about 20mm thick. A tlle of 300mm square need to be about 30mm thlck. The thlckness of the plate 184 obtalned by the clay body can be set ln a desired value accordlng to a speciflcation of a used rolllng mlll.
As mentloned above, the above embo~l -nt of the tlle ls obtalned by: moldlng the whl~lsb plates 184a and the ~lacklsh plates 184b as dlfferent colors of molded base ma~erlals out of the colored clay body 182 of a predetermlned molsture content; layerlng the plates 184a, 184b whlle coating an adhesive on their ~olnt ~ur~aces;
cuttlng the layered body at ~lxed lntervals in their layerlng directlon to ~orm the blocks 186; disposlng and presslng the blocks 186 wlth the cuttlng surface ~aced upslde or downslde in the pres~ure formlng dlsh 187; and drylng and burnlng the pressed block.
Accordlng to the above embodiment, a dlstlnct border 21~53 llne is formed in the pattern by the ~oint surface of the whltish plate~q 184a and the blackish parts 184b which go through the tile in the thickness direction. Thus, there ls no problem ~hat the tile has its surface layer abraded and its pattern faded or vanished.
Since any glaze ls not used on the surface of the tile, the tile surface is rough and hard to sllp if it gets wet ln a bathroom , a pavement or the llke, thereby assuring safety.
Here, though the pattern at the ~ectlon of the block 186 is pressingly spread a llttle ln pre~slng work, ~ n~.~ruch aq all the blocks are made of the same body materlal and fabricated out of the clay bodies 182 of the same density, or inasmuch as an adheslve ls coatea on the ~olnt surface, there are caused no cracks or the like nor any clearance The manufacturlng method of the present embodiment comprises: the raw material kneading step S521 for kneading, on the one hand, the raw materlal mixea powders and water, and on the other hand, the raw material mixed powder~ and plgment and water, thereby to prepare the uncolored clay body 182 and the colored clay body 182; the base materlal moldlng step S522 for molding the uncolored clay body 182 and the colored clay body 182 respectlvely lnto the whltlsh plates 184a and the blackl h plates 184b as the baqe material; the adheslve coating step S523 for coating an adheslYe on the ~oint surface of the whltlsh plates 184a and t he blackish plates 184b; the layering step S524 as a gath~rlng and pillng step for layerlng the whlti~h plates 184a and the blacklsh plate 184b on whlch the adhesive ha~ been coated; the cuttlng step S525 for cutting the layered body 185 at fixed lnterval~ in the layerlng dlrection to form the blocks 186; the preRsure formlng step S526 for dlsposing and presslng the blocks 186 in the pressure forming dlsh 187 while lts cutting surface ls faced upslde; and the drylng and burning step S527 for drylng and burnlng the pressed blocks 186.

2 ~ 5 3 Accordingly, lt ls pos~lble to manufacture the tlle with ease by the simple steps from the raw material kneading s~ep S521 to the drylng and burning step S527.

[FIFTH EMBODIMENT]
Next, a fifth embodiment ~f the lnvention will be described referrlng to FIGs. 29 to 33. A tile having a ~plral pattern 19 shown as an example.
Referring to FIG. 29, a tlle 191 has a splral pattern.
For lnstance, the pattern i8 composed of a dark brownlsh part l91a and a yellow part l91b. The dark brownlsh part 191a and the yellow part l91b go through the tile 191 ln lts thlckness dlrectlon, respectively, as ln the fourth embodiment. Thus, lf the tile is sliced at any plane parallel to its front surface, the ~ame c;piral pat~ern as that of the front surface appears at all times.
Next, manufacturing steps of the tile 191 wlll be descrlbsd referrlng to FIG. 30. The flfth embodiment is prlnclpally differ~nt ~rom the ~ourth embodiment in that lt has a colling step S535 after a layerlng step S53~.
In manufacturlng the tile 191, first, ln a raw materlal kneadlng step S531, two kinds of colored raw materlal mixed powder were prepared by addlng, on one hand, 2~ lron oxlde, and on the other hand, 2~ loess, respectively to the same raw material mlxed powder~ as those of the fourth embodlment whlch consist of 50%
feldspar, 20~ china clay, 10~ kaolin and 20% clay. Each kind of colored raw materlal mlxed powders were added wlth water and kneaded, thereby obtainlng two klnds of clay bodles whlch were respectively controlled to a molsture content of 25~. The raw material mlxed powders added wlth the lron oxide become dark brownlsh color and the raw material m1xed powders added with the loess become yellowlsh color.
Next, in a base materlal molding step S532, each clay body was molded by the double s~age rolllng mlll 183 thereby obtalning a d~rk brownish plate 192a and a 2 ~ 3 yellowlsh plate 192b each of whlch ls a rectangular shape 200mm wide, 500mm long and 3mm thlck.
Then! in an adheslve coating step S533, an adhesive wa~ coated on ~olnt ~urfaces of eaah of the two plates 192a and 192b. Thereafter, ln a layerlng ~tep S53~, the dark brownlsh plate 192a was placed below and the yellowish plate 192b was plled up thereonO They were gently pushed to each other as a whole 90 as no~ to generate any clearance between the layers, thereby to obtaln a layered body 192 shown ln FIG. 31. Then, in the colling ~tep S535, the layered body 192 of two layers was ~oiled lnto a roll by a wlnding machlne, whlle maklng one lateral end an axis for wlndlng, thereby obtalnlng a cylindrlcal bar of 40mm dlameter and 500mm length.
Next, ln a cuttlng ~tep S536, thls cylindrical bar wa~
cut into round slices one after another at 20mm intervals, thereby formlng cyllndrical blocks 193 shown in FIG. 32.
Thus obtalned block 193 has a splral pattern on lt~ ~ection as hown in FIG. 33.
After this, as in the fourth embodlment, ln a pressure formlng step S537, a total of sixteen cyllndrlcal cut blocks 193 were placed, four blocks 193 ln each of four rows in a pressure formlng dlsh, whlle each hlock 193 havlng lts opposlte surfaces ln the thlckness dlrectlon dlsposed at the upside and the downslde therein. This pressure formlng dish as a pressure forming dle ls a ~ -nslon of 175mm square. Then, they were pressingly molded at a pressure of 75~g/cm2. Thereafter, ln a drying and burnlng step S53B, a pressed hlock composed of the slxteen blocks 193 was dried at a temperature of lS0~ to 200~, and then burned 30 hours at a temperature of 1200~.
Thus, the nonglazlng tlle 191 of 170mm square was o~talned whlch had a two colored ~piral pattern as shown ln FIG. 29.
The pressed block of 170mm square contracted lnto 150mm square ln a flnlshed state.
As mentioned above, the fifth embodiment of the tlle ls made by: molding two kinds of colored clay bodles of a 2 ~ 3 predetermlned molsture content into the dark brownish plate 192a and the yellowlsh plate 192b; layering the plates 192a and 192b whlle coating an adhesive on the ~olnt surfaces thereof; coiling them lnto a bar and cuttlng the bar ln the layering dlrection at flxed lntervals, thereby obtalnlng the blocks 193; disposlng and pressingly molding the blocks 193 wlth their cutting surface ;Eaced above in the pressure formlng dish; and drylng and burnlng the pressed block.
The manufacturing method of thls embodiment of the tlle comprises: the raw materlal kneading step S531 for kneadlng the raw material mixed powders, plgments and water lnto ~he colored clay bodies of a predetermined molsture content; the base materlal moldlng step S532 for moldlng the colored clay boales into the dark brownlsh plate 192a and the yellowish plate 192b as plate base materials; the adhesive coating step S533 for coating the adhesive on the joint surfaces of these plates 192a, 192b; the layering step S534 as the collecting and piling step for layering the plates 192a, 192b with the adhesive coated thereon, thereby forming the layered body 192; the coiling step S535 as a deformlng step for coiling the layered body 192; the cutting step S536 for cutting the coiled body at flxed intervals to ~orm the blocks 193; the pressure forming step S537 for disposlng and presslngly molding the blocks 193 with their cuttlng surface faced above ln the pressure formlng dish; and the drying and burning step S53~ for drying and burnlng the pressed block.
Accordingly, the fifth embodlment ls expected to have slmilar advantages to those of the fourth embodlment. In partlcular, ln the fifth embod~ment, since the plates 192a, 192b are plled up ln two layers ln the step S534 and coiled in the coillng step S535, a varlety of patterns like spiral patterns can be obtain~d.

[SIXTH EMBODIMENT]
Next, in sixth to eighth embodiments, a tile having a pattern obtained by comblnlng bars llke cylindrical bars or 2 1 ~

square bars w111 be described.
First, ln the sixth embodiment, a tile having a pattern using two colors of cylindrical bars will be descrlbed referring to FIGs. 34 t~ 36.
In FIG. 34, a tile 201 has a diced pattern. rrhe pattern is formed by whitlsh parts 201a and blackish earts 201b, for example.
In manufacturlng the tile having such pattern, to start with, two kinds of clay bodies of a moisture content of 20~ which were colored respectively into white and black were prepared ln the same manner as the fourth embodiment.
Next, they were molded from an extruder using a round nozzle, thereby obtaining' many whitish bars 202a anq blackish bars 202b each of which is 9mm diameter and 500mm long, as shown ln FIG. 35. After an ad~esive was coated on ~oint surfaces of these bars 202a, 202b, as shown in FIG.
36, the two kinds of bars 202a, 202b were gathered and piled substantlally in a square bar shape of four rows and four decks ln a holder 205 while making their end surfaces flush. The holder 205 ls composed of a channel shaped stainless frame 203~ which has front and rear openings of 40mmX50mm, both slde walls of 50mmX600mm and a bottom surface of 40mmX600mm, and a slldlng plate 204 38mm wide, 550mm long and 5mm thlck, which ls assembled on the bottom surface of the frame 203 so as to be movable back and forth. ~his step constitutes a gathering and piling step.
Then, the gathered bars 202a, 202b were fed forward together with the sllding plate 204. Then, a bundle of cylindrlcal bars 202a, 202b was sliced into a block bodies 5mm thick. Four block bodles were placed with their cutting sur~ace faced above in a pres~ure forming die and pre~singly formed thereby. In this pressing, the block had its pattern, which was originally composed of multiple clrcles, changed into a diced one that clearances between the bars 202a, 202b were filled, as shown in FIG. 34, since the bars 202a, 202b were adJusted in a moderate moisture content and easlly deformed so as to be expanded in every 2 ~

directlon and shaped into squares.
In ~his embodiment, the diameter of each bar 202a, 202b is 9mm, ~lnce four cylindrlcal bars 202a, 202b are arranged for each row or each lin0. However, the diameter of each bar may be changed according to the number which will be disposed in the holder 205 and, especially, the width thereof. For example, in case five cylindrical bars 202a, 202b are arranged in order in 40mm wide holder 205, the diameter o~ each bar ls 7.5mm.

1~V~N1~ EMBODIMEN~3 ;~ In the seventh embodiment, a tile having a mottled pattern is described referring to FIGs. 37 and 38. ~he pattern is obtained by deformlng three colors of cyllndrlcal bars.
In FIG. 37, a tile 211 has a mottled pattern. For instance, the pattern is composed of brownlsh parts 211a, whitish part 211b, inner blackish parts 211c and outer blackish parts 211d.
In manufacturing the tile of the above pattern, first, brown, white and black clay bodies of a moisture rontent of 20~ were prepared ln the same manner as the fourth embodiment.
Next, these clay bodies were respectively extruded from a round nozzle of a conventional extruder to prepare many brownish bars 212a, whitish bars 212b and blackish bars 212c each of which was 3mm diameter and 500mm long.
Then, an adhesive was coated on ~olnt surfaces of these bars, and three brownish bars 212a and three whi~ish bars 212b were disposea one by one in a circle so as ~o surround a black1sh bar 212c as a center. Thereafter, they were enclosed by a blackish rlng tube 212d, which was made by rolllng a blacklsh plate 30mm wide, 500mm long and 2mm thick, thereby preparing a unlt gathered body 212 of 13mm diameter shown in FIG. 38. This step cons~itutes a gatherlng and plling step.
Next, the unit gathered bodies 212 of a round ~ar 21~$3 shape were further gathered and piled ln three rows and three llnes by use of a holder 205 slmllar to that of the slxth embodlment shown ln FIG. 36, thereby forming a gathered and piled body. Then, it was sliced into 15mm thick blocks in the same manner as the sixth embodiment.
~hey were dlsposed in order in a pressure formlng dish, pressingly formed, dried and burned. Thus obtained ~ile has a pattern that small square mottles are circularly llned on a hlack background.

[EIGHTH EMBODIMENT]
In the eighth embodiment, a tile having a lozenge pattern uslng two colors of triangle bars will be descrlbed, re~erring to FIGs. 39 and 40.
In FIG. 39, a tile 221 has a 1O2enge pattern. Each lozenge is composed of a brownish part 221a and a whitish part 221b, for example.
In manufacturing the tile, to begin with, a brown clay body and a white clay body were prepared, each of which had a moisture content of 20~.
Next, they were molded into two colors of isosceles triangle bars 222 having a side of 40mm and an altitude of 20mm, as shown ln FIG. 40, using a known extruder. Then, an adhesiYe was coated on ~oint surfaces of the~e triangle bars 222, and thereafter they were closely ~oined with thelr apexes contacted so that the same colors were symmetrically disposed into a square shape as a whole.
Then, the gathered body was cut into 15mm thick blocks. A
plurallty of cut blocks were placed in order in a pressure formlng dish of 85mm square while thelr cut surface faced above, presslngly formed and dried and fired. Thereby, a tile of 75mm square which had two colors of lozenges arranged ln order was obtalned.
Thus obtalned tiles can be of course used as tiles for building materials in such a place as a bathroom and a lavatory, or tlles for construction material in such a place as a pavement and a park. In addition, they are - ~4 -2~$~3 applicable or widely used for an ashtray for family use, a saucer, a tea caddy, a basin, or accessories like a pendant. Specially, due to the characteristics that the pattern is never faded nor vanished lf the surface ls abraded, they have outstanding advantages when used as tlles for building use such as a bathroom or a lavatory or tiles for constructlon use such as a pavement or a park.
Moreover, each color in the pattern goes through in the thickness directlon, and a spectrum pattern is formed at slde surface or the llke, so that they can exhlbit very massive lmpression when used for furniture or fixtures.
Here, ln the fourth to elghth embodiments, the clay body may be obtalned by adding a coloring pigment and water to the same raw material as the normal tiles such as feldspar, china clay, kaolin, clay, etc., and kneading them. In this case, the moisture content of the clay body is set in such a value as, when the blocks are disposed in the die to be pressed, the block are never destroyed by their expanslon and can flow to such a degree as to be fllled up to corners. By experlments, 20+5% is the best.
As the coloring pigment, pigments for kneading may be used like methyl cellulose, lron oxlde and Mn-Al pink, in addition to na~ural pigments like chromlte and loes~. ~he added amount is preferably one to two percent in normal uses.
As the adhesive for ~oining the molded bodies to each other, cellulose ether such as methyl cellulose, CMC
(carboxymethyl cellulose sodium), ethyl cellulose or benzyl cellulose, or a synthetic resin may be used. In addltion to such cellulose ether or synthetic resin, any one whlch can prevent the molded bodies from peeling off mutually by burning may be used. Moreover, in addition to organic adhesives like a synthetic resin, an inorganlc adhesive may be used as a matter of course. The inorganlc adhesive is advantageous ln view of property, but expensive. In view of cost~, the organlc adhesive is advantageous.
The drylng and burnlng after pressing may be carrled 2 ~ 3 out in accordance wlth a manufacturlng condltlon of common tlles.
In the fourth to eighth embodiments, whlle the adheslve is coated on the ~oint surfaces of the molded bodles of different colors after the colored clay bodies are molded lnto plates or bars, modi~icatlon is possible.
For example, the adhesive may be added beforehand to the colored clay bodles. In this case, particularly, it is possible to prevent crazes or cracks from being generated in the same color body in burnlng. Moreover, lt ls possible to omlt the step for coatlng the adhesive separately on the ~oint surfaces of the differently colored clay bodies, thereby simplifying more the manufacturing.
In the fourth to eighth embodiments, while plate or bar shaped molded bodies are gathered and cut into a constant width, thereby making the blocks, other modifications are possible. For example, after the bar molded bodies are gathered, they may be twisted in a circumferentlal direction by holding their circumference.
In this case, different patterns may appear on each desired cuttlng plane parallel to the surface of the tile, thereby enabling a varlety of patterns.
In the fourth to eighth embodlments, varlous colors may be used in additlon to the above mentioned colors. The size of the tlle can be desirou~ly set. The number of tiles dlsposed in the die can be appropriately determined such as one, two, four, or sixteen.
In the fourth to eighth embodiments, while the bars llke t he round bars or square bars are molded by the extruder, the machine or means for molding is not limited thereto.

[NINTH EMBODIMENT]
A ninth embodiment of the lnventlon will be de~crlbed referrlng to FIGs. 41 to 48. A tlle has a mottled spiral pattern.
In FIG. 41, a tlle 231 has a mottled spiral pattern composed of two mottled bars. The pattern is composed, e.g. of whitlsh parts 231a, blackish parts 231b and dark brownlsh parts 231c. The mottled spiral bar is disposed parallel whlle twisted, so that, when sliced on a desired plane parallel to a surface of the tile, a dlfferent pattern f~om that of the surface appears.
Next, manufacturlng steps of thls tlle i8 descrlbed referring to FIG. 42.
In manufacturing the tile 231, to start with, in a raw materlal kneadlng step S541, three klnds of raw material mixed powders were prepared: a flrst kind of raw materlal mixed powders consisting of 50% feldspar, 20% china clay, 10% kaolin and 20% clay; a second kind of colored raw m~terial mlxed powders composed of the first raw material mlxed powders added wlth 2% chromlte pigment powaers; and a thlrd kind of colored raw material mlxed powders composed of the flrst raw materlal mixed powders added wlth 1% red iron oxide. 3~ CMC as an adhesive and 25% water were added to each kind of raw materlal mixed powders. Then, as shown in FIG. 43, each klnd of powders were put into a mixer 233 of a contlnuous moldlng machine 232. They were sufficiently kneaded by a pug mill 234 to prepare three klnds of clay bodles. The first kind of powders become a whitish color, the second klnd become a blackish ~olor and the thlrd kind become a dark brownish color.
Next, ln a bar forming step S542, each kind of clay bodies obtained by the step S541 was extruded from a mouthplece 236 having a circular opening by use of an extruder 235 of the continuous molding machlne 232, thereby obtaining a soft whitish round bar 237a, a soft blacklsh round bar 237b and a soft dark brownlsh round bar 237c each of which was 8mm diameter and lOOOmm long, as shown in FIG.
44.
In a twisting step S543, ~s shown ln FIG. 45, the whltish bar 237a and the blacklsh bar 237b were put lnto each of two supply holes of a twister 238, and twisted under such a preset conditlon as they were twisted to a 2 ~

medium degree at a low speed in accordance with an operatlon of ~wlstlng a rope. lrhus, there was produ~ed a rope llke twlsted bar 239a of approximately 15mm diameter of mottled pattexn of black and whlte as shown in FIG. 46.
Similarly, the whitish bar 237a and the dark brownish bar 237c were put lnto the supply ports of the twister 238 and twisted, thereby obtaining a rope llke twlsted bar 239b of approximately 15mm dlameter of a mottled pattern of white and dark brown.
Next, in a pressure forming step S544, as shown in FIG. 47, two dlfferent colored ropes or the twisted bar 239a and the twisted bar 239b were disposed in a pressure forming die 240 of llOmm square, while being coiled in close contact about two rounds in the clockwise direction, and had their rest cut off. As shown in FIG. 48, the pressure forming die 240 is composed of a fixed lower mold 241 having a square hole and a movable lower mold 242 which vertically moves ln the fixed lower mold 241. A pressed body can be taken out easily by raising the movable lower mold 242 after presslng. After the twisted bar 239a and the twlsted bar 239b were accommodated in the pressure ~orming die 240 while colled, the rests of the twisted bar 239a, 239b which had been cut were packed ln a space defined at corners of the die 240. The pressing was carried out at a pressure of 75kg/cm2.
~ y this pressing, top round portlons of each rope or the twistea bar 239a, 239b were spread toward their diameter direction, thereby defining a border line positioned on the same plane between the ad~acent ropes of different color~. Thus, a long splral flow of mottled pattern was defined.
Thereafter, in a drying and burning step S545, the pressed body was drled at a temperature not more than 200~, and then burned thirty hours at a temperature of 1200~, thereby providing -a nonglazing tile 231 of lOOmm square which had a mottled pattern of three dlfferent colors of white, black and dark brown, as shown in FIG. 41.

210~33 In this embodiment, whlle the size of the tile 231 is 100mm square, it may be other desired slzes. The ~hape thereof may be modified desirously such as a clrcle, triangle, hexagon or octagon.
As mentloned above, the above embodlment o~ the tlle is made by: preparlng three kinds of colored clay ~odies which is of a predetermined moi~:ture content and added with CMC as an adhesl~e; twlsting each two of the different colors of bars or the whitish round bar 237a, the blackish round bar 237b and the dark brownish round bar 237c;
disposing the twisted bar 239a and the twisted bar 239b in a coiled manner on a hori~ontal plane ln the pressure forming die 240; and pressingly forming, drying and burning them.
According to the abo~e embodiment, a clear border llne is defined in the pattern by the joint surfaces of the whltish round bar 237a, blackish round bar 237b and dark brownish round bar 237c which go through the tile in the thickness direction. Thus, there is no problem that the pattern i5 faded or vanished when the tile surface i~
abraded.
Since no glazes are used on the tlle surface, the tile surface ls rough, so that it is hard to slip when got wet ln a bathroom, a pavement or the like, and assures safety.
Since the tile is made wholly of the same raw material and the clay bodies of equal density, and since the adhesive is added to the clay bodies beforehand, there are no cracks nor crazes in burning and no clearance generated.
The manufacturing method of the tile of this embodiment compxlses: the raw material kneading step S541 for kneadlng the raw material mixed powders, plgments, water and an adhesive to the raw material mixed powders to prepare the colored clay bodies of a predetermined moi~ture content; the bar forming step S542 for forming the whitlsh round bar 237a, the blackish round bar 237b and the dark brownish round bar 237c out of the colored clay bodies; the twisting step S543 ~or twi~ting the whitish round bar 237a, -- aS9 --the blackish round bar 237b and the dark brownish bar 237c;
the pressure forming step S544 for disposing the twisted bar 239a and the twisted bar 239b in a coiled manner on the horizontal plane in the pressure formlng die 240 and pressingly forming them; and the drying and burning qtep S545 for drylng and burnlng the pressed body.
Accordingly, the tile can be manufactured by the slmple steps from the step S541 to the step S545.

[TENTH EMBODIMENT]
Next, a tenth embodlment will be described referring to FIGs. 49 to 52. A tile has a quadrant mottled pattern.
In FIG. 49, a tlle 251 has a pattern made of many quadrant bars having mottles. Each quadrant bar is composed, e.g. of whltish parts 251a, blacki~h parts 251b, plnklsh parts 251c and blueish parts 251d. The quadrant bars are arranged horizontally while twlsted, so that, when the tlle ls sliced on any plane parallel to a tlle surface, a pattern slightly different from that of the surface appears.
Manufacturing steps of this tile will be described hereunder.
In manufacturing the tile 251, in the same manner as the ninth embodlment, ln a raw material kneadlng step S541 shown ln the ~lowchart of FIG. 42, an uncolored raw materlal mixed powders and three klnds of colored raw material mixed powders were prepared: uncolored raw material mixed powders consisting of 50~ feldspar, 20%
china clay, 10~ kaolin and 20% clay; first colored raw material mlxed powders obtained by addlng 1~ Fe2O3-Cr2O3-CoO black plgment to the uncolored raw materlal mixed powders; second colored raw materlal mlxed powders obtained by addlns 2% A12O3-MnO plnk to the uncolored raw materlal mixed body; and thlrd colored raw material mlxea body obtained b~ addlng 2% zircon blue plgment. 1% CMC and 25%
water were added to each klnd of raw material mlxed powders. Moreover, 2~ rock fibers 6mm long were added 2~ 3 thereto. Then, each of them WclS thrown and mixed in the mlxer 233 of the continuous molding machine 232 of FIG. 43, and sufficlently kneaded by the pug mill 234 to prepare four ~inds of clay bodies. The uncolored raw material mlxed powders become a whlte color after burning.
Next, in a bar forming step S542, each kind of clay body obtalned in the step S5~1 was extruded from the mouthpiece 236 of 6mm diameter by use of the extruder 235 of the continuous molding machine 232, thereby obtalning a soft whitish round bar, a soft blackish round bar, a soft plnkish round bar and a soft blueish round bar each of which was lOOOmm long~
In a twistlng step S543, the whitish bar and the blackish bar were put lnto each of the supply holes of the twlster 238 and twisted thereby to obtain a twisted bar 252a of a mottled pattern of black and white as shown in FIG. 50. Slmllarly, the pinkish bar and the blueish bar were put ln the supply hole of the twister 238 and twisted thereby to obtain a rope like twisted bar 252b of a mottled pattern of pink and blue. Then, these twisted bars 252a and 252b were further twisted to obtain a thlck double-twisted bar 253 of approximately 20mm dlameter as shown in FIG. 51.
Next, ln a pressure forming step S544, the double-twlsted bar 253 having four colors was colled five tlme~
wlth lts one end as a start polnt, and cut off along one-dot chain lineq lnto four quadrants, as shown ln FIG. 52.
The rests of the bar 253 in cutting were stored for packing into spaces of corners of the die. Next, a guadrant cut piece of the bar 253 was placed in the pressure forming die 240 o~ llOmm s~uare shown in FIG. 48. Then, the rests of the bar 253 were fllled ln the spaces defined at the corners of the die 240. Thereafter, the filled body was pressed .
Then, ln a drying and burning step S545, the pressed body was dried at a temperature not more than 200~, and burned thir~y hours at a temperature of 1200~, thereby i3 ~ ~

forming a nonglazing tlle 251 of 100mm square having a mottled pattern of four colors of white, black, pink and blue.
As mentioned above, the temth embodlment of the tlle is made by: molding the coloxed clay bodles of a predetermlned moisture content each of which i6 added wlth CMC as an adheslve and rock flbers a~ reinforcing flbers to obtain different colored bars or the whitish round bar, the blackish round bar, the pinkish round bar and the blueish round bar; twisting each two of them; further twisting the twlsted bars 252a and 252b formed by twisting the above bars to prepare the double-twisted bar 253; arranging lt horizontally in the pressure forming die 240; and presslngly forming and drying and burning.
Accordingly, ths same advantages are expected as the ninth embodiment. Particularly, due to the double-twlsted bar 253, more various patterns may be obtained. Since the reinforcing flbers are added, a tensile strength in twisting is lmproved so as to prevent rupture of the round bars in double twisting.

[EL~V~Nl~ EM~ODIMENTl An eleventh embodiment o~ the invention will be descrlbed referring to FIG. 53. A tile has a mottled strlpe pattarn.
In FIG. 53, a tile 261 has a mottled stripe pattern.
The pattern is composed, e.g. of whitish part 251a, blackish parts 251b, plnklsh parts 251c and blueish parts 251d as in the tenth embodlment.
A manufacturing of this tile was carried out by use of a double twisted bar 253 similar to that of the tenth embodiment. Flrst, the double-twlsted bar 253 of four colors was cut lnto a length of 105mm. A plurality of cut pleces of the bar 253 were disposed in the same direc~lon in the pressure forming die 240 and pressed. Then, they were dried at a temperature of not more than 2~0~, and burned thirty hours at a temperature of 1200~, thereby 2~ 3 obtalning a nonglazlng tile 261 having a mottled strlpe pattern of four colors of white, black, plnk and blue.
Thus obtained tile has wlde uses as ln the tiles of the fourth to eighth embodiments. Partlcularly, lt shows outstandlng advantages when used for tiles for construction use. Moreover, it can give a masslve feeling when used in furniture or fixtures or the like.
In case the different colored barq made of the colored clay bodles have an adhesive coated on the jolnt surfaces and twlsted, a ~oinlng strength at the borders of the dlfferent colors can be heightened in special.
In the ninth to eleventh embodiments, the clay bodies may be obtalned by adding coloring pigments, water and, if desired, an adhe~ive to the same materlal as common tlles such as feldspar, chlna clay, kaolin, clay, etc., and kneadlng th~m. In this case, the molsture content of the clay body ls set so that, when the twisted bar is disposed and pre sed in the dle, lt can flow to such a degree as being filled up to the corners in the die thereby preventlng lts destroy by expansion. By experiments, 20tS~
18 the best.
As the colorlng pigments, pigments for kneading may be used such as chromlum oxide, lron oxide or Mn-Al pink, ln addltlon to natural pigments like chromite or loess. The added amount ls one to two percent usually.
As an adhesive ~oining the molded bodles mutually, e.g. a cellulose ether like CM (methyl cellulose), CMC
(carboxymethyl cellulose sodium), ethyl cellulose or benzyl cellulose, or a synthetlc resln may be used. In addition, as the adheslve of the nlnth to eleventh embodlments, any one may do as long as lt prevents cracks or the like ln burnlng as in the fourth to elghth embodlments. Of course, inorganlc adhesives may be used in addltlon to the organic adhesives like a synthetic resin.
The drylng and burnlng after pressing may be carried out in accordance with a manufacturing condition for generally known nonglazing tlles.

2 ~ 3 While, in the nlnth to eleventh embodiments, the adhesive is beforehand added to the raw material mlxed powders for preventing cracks by burning, peellng off between different colored parts or the like, other modifications are posslble. For example, the adhesive may be coated on the contact surfaces of every colors of bars after they are extruded in the bar forming step S542. In partlcular, thls is more effectlve for prevention of peellng off at the borders o~ different colored portlons.
The adhesive may be added beforehand to the raw material mixed powders, and further coated on the contact surfaces of the bars in the bar formlng step S542.
In the ninth to eleventh embodiments, whlle the twisting of the ~ars is done by the twister 238, ~ machine or means therefor ls not limited thereto, but any means for giving an even twisting to the round bars may do instead.
For example, twisting by hand is possible.
Whlle, in the nlnth to eleventh embodiments, the twisted bar ls obtalned by one tlme or two times twisting, the twlsting times are not limited thereto. Mottles of the pattern can be increased by uslng thinner round bars and multiplying the twisting tlmes. The colors or color arrangem~nt are not limlted to those of the above embodiments, but they may be chosen from various kinds of colors or color arrangements. The size of the tile may be set in desired one.
While the tenth and eleventh embodiments use the rock flbers as the reinforcing fibers, other reinforcing ~ibers like whlsker may be used. Moreover, depending on the material of the tile, any types of reinforcing materlal that can keep lts fibrou~ state at any burning temperatures can be used such as glass wool, metal fibers, etc.
Glazlng treatment of the tile surface may be freely adopted according to its use.

Twelfth to slxteenth embodiments of the invention will be described hereunder.

2 1 ~ 3 FIGs. 54(a) to 54(d) illustrate respectively examples of angle tlles having various colored patterns which are obtalned in each of the twelfth to sixteenth embodiments.
The angle tlle 260, 270, 280, 290 only as an example of these embodiments ~ 8 composed o~ long and short tiles Joined by a rectangular corner 263, 273, 283, 293. They may bP used for stepped parts of stalrs or roads or the like. In the followlng description, the long tile is called a main plate 261, 271, 281, 291. The short one ls called a bent plate 262, 272, 282, 292.
In FIG. 54(a), the main plate 261 of the tile 260 has two palrs of triangle parts of different colors while each palr shows symmetry. The bent plate 252 is the same color as that of the ad~acent trtangle. In FIG. 54(b), the main plate 271 of the tile Z70 has a pair of symmetrically arranged semicircular parts and other parts of different colors. The bent plate 272 is the same color as that of the other parts. In FIG. 54(c), both of the main plate 281 and the bent plate 282 of the tile 280 has a spread mottled pattern. In FIG. 54(d), the main plate 291 of the tile 290 has the same color arrangement as that of the tlle of FIG.
54(a). The bent plate 292 has a color arrangement correspondlng to a half of the above color arrangement.
These are the appearances of the tiles in each embodiment.

lTWELFTH EMBODIMENT]
The twelfth embodiment will be described referring to FIGs. 55 to 60, taking the angle tile 260 as an example.
In FIG. 54(a), the angle tlle 260 has the main plate 261 and the bent plate 262 formed at both sldes of the corner 263. The main plate 2~1 has one pair of triangles provlded with llght blue spots on a whlte background and the other pair provided wlth light gray spots on a black background. The bent plate 262 has light blue spots on a whlte bacXground like the one triangle pair of the main plate 261.
This angle tile 260 was manufactured according to a 2 ~ 3 process of FIG. 55 by use of the followlng devlce.
FIG. 56 shows a plate tlle press machine 410 used in a preformed ~ile body forming step S551. FIG. 57 shows a preformed tlle body 300 made by this plate tlle press machine 400. Thls preformed tlle body lncludes a preformed main plate body 301 forming the main plate 261 and a preformed bent plate body 302 forming the bent plate 262.
Each preformed tlle body 301, 302 has a trlmmed part 304.
FIG. 58 shows a bar press machine 420 used in a joining bar forming step S552 of FIG. 55. FIG. 59 shows a joining bar 303 formed hy the bar press machine 420 of FIG. 58. FIG.
60 shows a press die in an angle tlle pressing machine used in an angle tile body formlng step S554, a lower mold 431 and an upper mold 432 thereof.
To begin with, in a preformed tile body forming step, colored granules used for preparing the preformed tile ~ody 300 were prepared as follows. A crashed mix raw material consistlng of 50~ feldspar, 20% china clay, 10% kaolin and 20~ clay was used herein. Three kinds of colored crashed mix raw materials were prepared: a flrst material adding 5%
black pigment (belonging to a group of CoO, Cr2O3, Fe2O3) to the above crashed mix raw materlal; a second materlal addlng 5~ blue plgment (belonging to a group of ZrSiO4(V)~;
and a third materlal without any plgment added. Water was added to each kind of these materials. They were then mixed and ground by a trommel or the like into a slip, and granulated by a spray drier into granules of a fixed moisture content (granule diameter of about 70~m). Thus, black, blue and uncolored (white) granules were prepared.
The preformed tile body 300 was prepared using these colored granules (including white ones) as mentioned below.
First, a partition plate (not shown) was dlsposed diagonally in a forming space 412 (103mm wide, 120mm long and 13mm deep) of the lower mold 411 of the plate tile press machlne 410 shown in fig. 56. Thus, the forming space 412 was divlded lnto four isosceles right triangles.
Then, a mlxture of the uncolored or white granules and the 2 1 ~

blue granules was filled ln the facing one pair of the ~rlangle spaces. A mlxture of the whlte granules and the black granules was filled in the other pair of the triangle spaces. Thereafter, the partl~lon plate was removed, and the granules were pressed by the plate tile press machine 410 to make the preformed main plate tlle body 301 havlng a colored pattern shown in FIG. 57. ~ mixture of the white granules and the blue granules was filled in the forming space 412 (103mm long, 55mm wlde and 13mm thick) of the lower mold 411. They were similarly pressed to obtain the preformed bent plate body 302. The pressing was carried out at a pressure of 200kg/cm2.
As mentioned above, the trlmmed part 304 ls provlded in a length of about 20mm on a part unnecessary in a finished tile or outside ends of the preformed main plate body 301 and the preformed bent plate body 302. This trimmed part 304 is cut off in a following s~ep.
Therefore, uncolored or white granules were filled at a part correspondlng to the trimmea part 304. Accordlngly, ln forming the preformea main pla~e body 301, the partition plate was diagonally dlsposed only in a square part (103mm square) of the forming space 412 while excepting a part for forming the trimmed part 304 (about 20mm wide).
Next, in a ~oining bar forming step S552, a joinlng bar 303 was formed. This joining bar 303 had a cross section of 13mm square and a length of 103mm and was made by filling a mixture of the white granules and the blue granules used ln forming the pre~ormed tile body in the bar press machine 420 shown ln FIG. 58, and presslng it. FIG.
59 shows thus obtalned ~oining bar 303 which has a pattern of light blue spots scattered on a white background.
In a preformed tlle body and ~oining bar disposing step S553, two kinds of preformed tlle bodies 301 and 302 obtained in the ~tep S551 and the ~oining bar 303 obtained in the step S552 were respectlvely disposed in the lower mold 431 of the press die 430 of the angle tile presslng machlne which molded an angle product. Speclfically, the 21 0 ~

joining bar 303 was dlsposed along a lowermost rectangular corner of the V-shaped lower mold 431. At thls tlme, since the corner of the joinlng bar 303 and the corner of the lower mold 431 are rectangular, respectively, the ~oinlng bar 303 can be disposed in close contact therewlth. Next, the preformed main plate body 301 and the preformed bent plate body 302 were disposed at both sldes of the ~oining bar 303 on both slopes of the lower mold 431. Here, they were disposed so that one end or the side of the trimmed part 304 was positioned outslde and that the other end surface was touched vertically with the ~oining bar 303.
At this time, a size of one part, for the main plate, of the lower mold 431 is 105mm wide, 120mm long and 13mm deep.
A size of the other part, for the bent plate, of the lower mold 431 is 105mm long, 55mm wlde and 13mm deep. Uncolored granules were filled in contact surfaces between the preformed tile bodles 301 and 302 and the ~olning bar 303 in a small amount, and also in a gap at contact parts between the preformed tile bodies 301 and 302 and the upper mold 432 ln a thlckness of the preformed tile body. FIG.
60 shows the state of each material on the lower mold 431.
In an angle tile body forming step S554, the reversed V-shaped upper mold 432 corresponding to the shape of the lower mold 431 was pressed against the materials on the lower mold 431 at a pressure of 300kg/cm2. Thus, the materlals were lntegrally pressed and the angle tile body was obtalned. The angle tlle body wa8 taken out by pulling up the upper mold 432 and pushed up the lower mold 431 up to a take-up level.
As mentloned above, the trimmed parts 304 approximately 20mm wide were provided on both ends of the angle tlle body or unnecessary parts ~or ~inished tiles.
These trlmmed parts 304 were removed by cutting by a cutter along cutting lines shown ln FIG. 60. Since the angle tile body ls a pressed body molded by a sufficient presslng force, it has enough strength to bear any works by hand to a sufficient degree, unless it ls intended to destroy lt.

2 ~ 3 In a burnlng step S555, the angle tile bodies obtained in the step S554 were arrangecl in a chamotte sagger at appropriate intervals therebetween. They were burned four hours at a temperature o~ 1200~ and slntered.
Thus, the angle tile 260 was ob~alned. AS ~hown ln FIG. 54(a), this tlle 260 has the main plate 261 lOOmm wide, lOOmm long and lOmm thlck and the bent plate 262 lOOmm long, 50mm wide and lOmm thick at opposite sides of the rectangular corner 263. The main plate 261 ls diagonally divided into two pairs of triangles one pair of which has the light blue spotted pattern on the white background and the other pair of which has light gray spotted pattern on the black background. The bent plate 262 has the light blue spotted pattern on the white background whlah is the same as the pattern of the ad~acent part of the maln plate 261.
As mentioned above, thls embodiment of the angle tile 260 ls made by: disposing the plate shaped preformed tile bodies 301 and 302 having the spotted pattern respectively on the opposite slopes of the lower mold 431 of V-section;
disposing the ~oining bar 303 of the same materlal as the preformed tlle body 301, 302 between the facing end surfaces of the preformed tlle bodies 301 and 302 along the edge of the lower mold 431; and pressing them between the lower mold 431 and the upper mold 432 into one body, and then burning them.
According to the present embodlment, slnce the plate shaped preformed tile bodies 301 and 302 are given colored patterns on thelr surfaces beforehand, such patterns appear on the surface of the angle tile as they are, so that it ls possible to obtain the above mentioned patterns that would be difflcult to provide in conventional molds for angle tiles. Moreover, slnce the preformed tlle bodles 301, 302 are ~oined by the ~olning bar 303 of the same material into the anyle molded body without any ~olnt line, so that the finlshea tile has a good appearance and sufficient corner strength.

- 5g -5~ 3 The manufacturing method of the angle tile comprises:
the preformed tile body forming step S551 ~or forming the plate shaped preformed tile bodies 301, 302 havlng the colored spotted pattern on their surfaces; the ~oining bar forming step S552 for forming the ~oining bar 303 of the same material as the preformed tile body 301, 302; the preformed tlle body and joining bar dlsposing step S553 for disposing the preformed tile bodies 301, 302 respectively on the opposi~e slopes of the lower mold 431 of V-section and the ~oining bar 303 between the end surfaces of ~he preformed tile bodles 301, 302 along the edge of the lower mold 431; the angle tile body forming step S554 for pre~sing the preformed tlle bodie~ 301, 302 and the ~oin~ng bar 303 between the lower mold 431 and the upper mold 432 to form the angle tile body as one body; and the burning step S555 for burning the angle tile body.
According to this embodiment, the angle tile having the colored spotted pattern can be obtained by the simple steps from the step S551 to the step S555.

[THIR~L~ L~ EMBODIMENT]
The thirteenth embodiment o~ the in~entlon will be described referrlng to FIGs. 61 to 63(b), taking the angle tile 270 of FIG. 54(b) as an example.
In FIG. 54(b), the angle tile 270 has the main plate 271 and the bent plate 272 at both sides of the rectangular corner 273. The main plate 271 has a pattern composed of a pair of semiclrcles, one of which is yellow and the other of whlch is green, and the other parts which is white. The bent plate 272 has a pattern of the same white color as the ad~acent part of the main plate 271.
Thls angle tile 270 was manufactured as follows.
FIG. 62 shows a preformed tlle body 311 formed in a preformed tile body forming steps S561. FIG. 63 shows an aluminium frame 435 of the press die 430 of the angle tile pressing machine used in the angle tile body forming step S554. The frame 435 defines guide walls ln filling jolning granules at the edge of the lower mo~d 431 o~ V-section. A
pair of trlmmlng metal fittings 436, 437 are disposed at such positlon~ a~ trimmed parts are to be pro~lded on each end of the preformed tile bodies 311, 312 which are placed on the slopes of the lower molcl 431. The flttings 436 ls situated agalnst the outslde end of the preiormed maln plate body 311. The other fittlngs 437 ls sltuated against the outslde end of the preformed bent plate body 312.
Firs~, in the preformed tile body formlng step S561, three klnds of colored crashed mlx raw materials were prepared from the same uncolored crashed mix raw material as the twelith embodlment: first colored materials obtained by adding 5% yellow plgment (titan yellow) to the uncolored materlal; second colored materlal obtained by adding 5%
green plgment (chromlum oxlde) to the uncolored materlal;
and the uncolored crashed mix raw material as lt is though it ls called a colored crashed mix raw materlal herein for convenlence sake. Each of them was added with water and granulated lnto particles o~ about 70~m diameter, thereby preparing thr~e klnds of colored granules or yellow, green and uncolored ~white) granulesO
Then, in the preformed tile body forming step S56l, two partltlon plates (not shown) were disposed in the forming space 412 of the lower mold 411 of the plate tile press machlne 410. Each partitlon plate is semicircular and has a dlameter equal to a length of a side of the forming space 412. Thus, the partltion plates divided the formlng space 412 lnto three spaces (two semicircular spaces and the rest). The yellow granules and the gre2n granules were filled respectively in the two semicircula~
spaces and the whlte granules were iilled in the rest oi the space. Then, the partltion walls were removed and the colored granules were pressed by the plate tile press machine 410 to form the preformed main tile body 311. On the other hand, using another plate tile press machine whlch was substantially the same construction as the press machine 410 but different in size and had a lower die and a 2 1 ~ 3 formlng space, the preformed bent plate body 312 was prepared. For convenience sake, the press die and its elements are given the same reference numerals as those of the press dle 410. Namely, the white granules were filled in all the ~orming space 412 and pressed similarly to the above, thereby formlng the preformed bent plate body 312.
FIG. 62 shows the preformed tlle body 311 molded as above.
~ere, the size o~ the formlng space 412 for the preformed main plate body 311 was 308mm wide, 308mm long and 25mm deep. The size of the forming space 412 for the preformed bent plate body 312 wa~ 308mm long, 35mm wide and 25mm deep. The pressure was 200kg/cm2.
In the twelfth embodiment, the tri~med part 304 is formed at the end of each preformed tlle body 301, 302, and the formlng space 412 includes a space for such trimmed part. However, in this embodiment, as mentioned below, the trimming metal fittings 436, 437 of substantially a similar shape to the trimmed part 304 is placed in moldlng the angle tlle body. Thus, the forming space 412 in this embodiment includes no space for such trimmed part.
Next, in a Joining granule forming step S562, ~oining granules were prepared by adding 1% CMC to the whlte granules, whlch were used in formlng the preformed tile body 311, 312.
Then, in a preformed tile body and joining granule dlsposing step S563, each preformed tile body 311, 312 and the ~oinlng granules were dlsposed on the lower mold 431 of V-sectlon. Specifically, the alumlnium frame 435 (305mm long, 50mm high and 30mm wide) for guiding the ~oining granules as packed material was disposed ln the lower mold 431 so that its opening was contacted with t he edged area of the lower mold 431. Thereafter, the ~oining granules were put lnto the frame 435. Then, as shown ln FIG. 63(a), the preformed maln plate body 311 and the preformed bent plate body 312 were disposea in the lower mold 431 so that they were contacted to the frame 435. Then, the frame 435 was removed, and simultaneously, each preformed tlle body 2 1 ~ 3 311, 312 was pushed toward the edge of the lower mold 431 (ln a dlrection of arrow of FIG. 63 (~) ) along the slope thereo~, th~r~by maklng the preeormed tile bodies 311, 312 nearer. Next, the trimming metal fittings 436, 437 were placed so as to touch the ends of the preformed tile bodies 311, 312 in such posltlons as the trlmmed parts were placed. FIG. 63~b) shows a st.ate obtained by the above operation. At this time, as shown in FIG. 63(b), the ~olnlng granules were densely packed ln a bar shaped space of 25mm s~uare sectlon which was defined by the end surfaces of the two preformed tlle bodles 311, 312.
Moreover, the rest of the ~olnlng gran~lles burled an inside part deflned by touching edges of the two preformea tlle bodies 311, 312.
Then, in an angle tile body forming step S564, the upper mold of reversed V-section corresponding to the sectlon of the lower mold 431 is pressed agalnst the lower mold 431 at a pressure of 400kg/cm , thereby obtaining an angle tile body wlthout any cutting works needed. Since the thlckness of the trlmmlng metal fittlngs 436, 437 as an alternate of the trimmed part is set lnto 80% that of each preformed tile body 311, 312, they never hinders the presslng work of the angle tlle body into one body.
Thereafter, in a burning step S565, as in the twelfth embodiment, the angle tlle body was kurned to obtain the angle tile 270. The angle tile 270 has the main plate 271 300mm wide, 300mm long and 20mm thlck and the bent plate 272 300mm long, 50mm wlde and 20mm thick at opposlte sldes of the rectangular corner 273 shown in FIG. 54(b). The maln plate 271 has a pattern composed of a palr of symmetrically arrange~ semlcircles, one of whlch ls yellow and the other of which is green, and the rest part whlch is whlte. The be~t plate 272 has a pattern of whlte color which is the same as the ad~acent part of the main plate 271.
As mentioned above, this embodiment of the angle tile 270 is made by: disposing the plate llke preformed tile 2 1 ~ 3 bodles 311, 31Z having colored patterns thereon on both the slopes of the lower mold 431 of V-section; disposing the ~oinlng granules of the same material ~etween the end surfaces of the preformea tile bodies 311, 312 along the lowermost corner of the lower mold 431; and pressing them between the upper mold 432 and the lower mold 431 into one body, and burning it.
According to this embodiment, as in the twelfth embodiment, it ls posslble to provide an angle tile which has a colored pattern and a good apearance.
The manufacturlng method of the angle tile in this embodiment comprlses: the preformed tile body forming step S561 for forming the plate ~haped preformed tile bodles 311, 312 having the colored patterns thereon; the Joining granules forming step S562 for forming the joining granules which are the same material as those of the preformed tile body 311, 312; the preformed t~le body and ~oining granule disposing step S563 for disposing the preformed tlle bodies 311, 312 on bo~h the slopes of the lower mold 431 and the ~olning granules between the end surfaces of the preformed tile bodies 311, 312 along the corner of the lower mold 431; the angle tile body formlng step S564 for pressing the preformed tile bodies 311, 312 and the joining granules between the upper mold 432 and the lower mold 431 to form the angle tlle body; and the burning step S565 for burning the angle tile body.
According to this embodlment, it is possible to provide an angle tile having a colored pattern with simpla steps. Moreover, in thls embodiment, slnce the trimming metal fittings are used, there ls no need to provide the trlmmed part on the preformed ~ile body.

[FOUR~ l~ EMBODIMENT]
Next, the fourteenth embodiment of the invention will be described referrlng to FIGs. 64 to 67, taking the angle tile 280 of FIG. 54tc) as an example.
In FIG. 54(c~, the angle tile 280 has the main plate 2 1 ~ 3 281 and the bent plate 282 at opposite sldes of the rectangular corner 283. Each of the main plate 281 and the ben~ plate 282 i9 provlded with a spread mottled pattern continually.
This angle tile 280 was manufactured as below, according to the manufacturing steps simllar to those of the twelfth embodiment.
FIG. 64 shows an extruder 440 used ln the preformed ~ile body forming step S551 and the ~olning bar forming step S552. FIG. 65 shows a preformed tile body 320 formed ln the preformed tile body formlng step S551. FIG. 66 shows a ~oining bar 323 molded ln the ~olning bar forming step S552. FIG. 67 shows a press dle 430 in the angle tlle press machlne used in the angle tlle body formlng step S554.
First, ~n the preformed tile body forming step SS51, the preformea tlle body 320 was fabricated as follows.
Three kinds of colored granules (white, dark brown and blue) were prepared by: adding 5% white plgment (zircon), 5~ dark brown pigment (Fe2O3-ZnO) and 5% blue pigment (zirc~n blue or the like) respectlvely to three crashed mlx raw materials similar to that of the twelfth embodiment;
further adding water to each of them so that the moisture content ~ecame 20~; and kneading each of them. ~he three kinds of colored clay bodies were respectively put into the extruder 440 shown in FIG~ 64. Then, each clay body was extruded from a mouthpiece of 25mm diameter (not shown)0 thereby moldlng white, dark brown and blue bars each of which is lO~Omm long and of a circular section.
Thereafter, three kinds of colored round bars were gathered and piled in four rows and four llne~ while arranging the colors at random. Then, the gathered body was vertically cut at 25mm lntervals in the longitudinal direction. The cut pieces were half-dried by air drying at a temperature of not more than 50~. The half-dried cut pieces were disposed in the forming space 412 of the lower mold 411 of the plate tile press machine 410 while their cut surfaces 2 ~

belng faced above. Then, they were pressed at a pressure of 40kg/cm2 thereby formlng nondrled body of the preformed tile ~ody 320. At the time of pressing, the cut pieces were deformed and spread, thereby providlng the preformed tile body 320 which had a flowing mottled pattern on lts surface.
In the twelfth embodlment, two kinds of preformed tlle bodle~ 311 and 312 of dlfferent slzes were prepared ~or the maln plate and the bent plate. ~owever, ln this embodiment, two preformed tlle bodles 320 of the same slze were ~oined, and one of them was cut off ln half to make a bent plate 282. Therefore, in thls embodiment, only one size of preformed tile body 320 was prepared which had a dlmension subtracting the dimension of the trimmed part from the dimension of the preformed main plate body 301 o~
the twelfth embodiment.
Thus o~talned nondried preformed tile body 320 was further air-dried at a temperature of not more than 50~, thereby forming the preformed tlle body 320 shown in FIG.
65. ~hus dried preformed tile body 320 contracted to 105mm square due to evaporatlon of molsture in comparison with the nondried one.
A preqs die 430 for formlng an angle tile body has a lower mold of reversed V-section. So, ln a ~olning bar forming step S552, a ~oining bar 323 was formed into a sectlon that was fitted in a space of generally V-shape defined between end surfaces of the preformed t~le bodles 320, when two tile bodies 320 were disposed on opposlte slopes of the lower mold 431. A making process thereof wlll be descrlbed hereunder.
In making the ~olnlng bar 323, the three kinds of colored round bars used ln forming the preformed tile body 320 were cut respectively lnto a length of 25mm. The same number of the cut pieces of each color were mixed and kneaded until they made mottled pattern. Thereafter, they were put lnto the extruder of FIG. 64. ~he kneaded materlal was extruded from a mouthpiece ~not shown) whlch 2 1 ~ 3 had a shape composed of a semicircle of 30mm diameter and an lsosceles right triangle of 15mm side wlth its bottom connected to a chord of ~he semlclrcle. The extruded body was cut lnto a length of llOmm, then drled 24 hours at a temperature of not more than 50~. Thus, The joining bar 323 havlng a spread mottled pattern was obtained as shown ln FIG. 66.
Next, ln a preformed tile body and ~olning bar dlsposing step S553, two preformed tile bodies 320 were disposed respectively on opposlte slopes (107mm wide, 107mm long and 15mm deep~ of the lower mold 431 of reversed V-sectlon of the press die 430. A V-sectlon space was defined by the upper end surfaces of thus disposed two preformed tile bodles 320. Next, the ~oining bar 323 having the spread mottled pattern was disposed and fitted ln the space between the two preformed tile bodies 320.
Then, ln an angle tile body forming step S554, as shown ln FIG. 67, the upper mold 432 of a V-section corresponding to the section of the lower mold 431 was pressed against the materials on the lower mold 431 at a pressure of 60kg/cm2, thereby making an angle tlle body.
This angle tlle body was dried sufficiently at a temperature of not more than 100~, and cut off by a cutter at such a positlon (a position shown by a two-dot chain line of FIG. 67) as the length of the bent plate 282 was 50mm.
In the present embodlment, the bent plate 282 was obtalned by cutting the preformed tile body 320, because the pattern on the preformed tile body 320 ls a spread mottled one and lt is hard to obtaln the same pattern except the square shape. The cut parts were used for manufacturing another angle tiles.
In a burning step S555, the angle tile body was burned under the same condition as the twelfth embodiment, thereby maklng the angle tile 280 shown in FIG. 54~c). The tile 280 has the main plate 281 lOOmm wide, lOmm long and lOmm thlck and the bent plate 282 lOOmm long, 50mm wlde and lOmm 2 1 ~ 3 thick at both sides o~ the rectangular corner 283. Both the main plate 281 and the bent plate 282 have the tricolor spread mottled pattern of white, blue and dark brown continually formed on thelr surface.
As mentioned above, this embodiment of the tile 280 is made by: disposlng the plate shaped preformed tile bodies 320 havlng ~he spread mottled pattern respectively on the opposite slopes of the lower mold 431 of reversed V-section; dlsposlng the ~oining bar 323 of the same material as those of the preformed tile body 320 between the end surfaces of these preformed tile bodles 32Q along the peak of the lower mold 431; pressing them between the upper mold ~32 and the lower mold 431 lnto one body; and burning i~.
The manufacturing method of this embodlment of the tile comprlses: the preformed tlle body forming step S551 for forming the plate shaped preformed tile body 320 having the spread mottled pattern thsreon; the ~olning bar forming step S552 for forming the ~oining bar 323 of the same material as the preformed tile body 320; the preformed tile body and ~oining bar disposing step S553 for disposing the preformed tile bodies 320 respectively on the opposite slopes of the lower mold 431 of reversed V-section ana the ~oining bar 323 between the end surfaces of the preformed tile bodles 320 along the peak of the lower mold 431; the angle tile body forming step S554 for pressing the preformed tlle bodles 320 and the ~oining bar on the lower mold 431 by the upper mold 432 into one body so as to make the angle tile body; the burning step S555 for burning the angle tile body.
According to the angle tile and its manufacturing method of thls embodiment, the same advantageous effects can be obtalned as the twelfth and thlrteenth embodlment.

[FI~ ~ EMBODIMENT]
The fifteenth embodiment of the inventlon will be described referring to FIG. 68, taking the angle tlle 290 of FIG. 54(d) as an example.

21~53 In FIG. 54(d), the angle tile 290 has the main plate 291 and the bent plate 292 at both sides of the rectangular corner 293. The main plate 291 has the same pattern as that of the angle tlle 260 of FIG. 54(a). The bent tile 292 haR a pattern similar to that of the maln plate 291 ~a pattern obtained by cutting the pattern of the preformed main plate body 301 ln half). The patterns on the main plate 291 and the bent plate 292 are continuously provided.
This angle tile 290 was manufactured as below according to steps similar to those of the thlrteenth embodlment.
First, ln a preformed tlle body forming step S561, a pre~ormed maln plate body 301 was made by use of the plate tlle press machine 410 used in the twelfth embodiment. A
preformed bent tlle body 332 was made by use of a partition plate lnot shown) 50 that the pattern became a pa~tern obtained by cutting the pattern of the preformed main plate body 301 in half. The thickness of the preformed tile bodies 301, 332 was lOmm.
In a ~olning granule forming step S562, joining granules were prepared by adding 1~ CMC to the black granules used in formlng the preformed tlle body 301, 332.
Next, in a preformed tile ~ody and ~oining granule dlsposing step S563, the preformed tile bodies 301, 332 and the ~oining granules were dlsposed on the lower mold 431 of V-sectlon, as ln the thirteenth embodiment. However, in this embodiment, the black granules were filled by use of the aluminium frame 435 103mm long, ~Omm high and lOmm wide. Moreover, the black granules were disposed as a linlng materlal over the preformed tile bodies 301, 332 in a uniform thickness o~ 6mm.
Then, ln an angle tile body forming step S564, as shown ln FIG. 68, the materlals on the lower mold 431 were pressed by the upper mold 432 to form an angle tlle body.
The thlckness of the angle tile body was ~3mm.
Thereafter, vla simllar steps to those of the thirteenth embodlment, the angle tlle 290 was obtained as 2 ~

shown ln FIG. 54(d). The angle tlle 29~ has the maln plate 291 and the bent plate 292 of the same dlmension as those of the twelfth embodlment. The main plate 291 has the same pattern as that of the main plate 261 of the twelfth embodiment. The bent plate 292 has the pattern similar to that of the maln plate 291 (the pattern cuttlng the pattern of the maln plate 291 in half). ~he patterns of the main plate 291 and the bent plate 292 are continuously provided.
As mentioned above, the present embodiment of the tlle 290 ls made by: disposlng the preformed tile bodies 301, 33~ having the colored pattern respectively on the opposite slopes of the lower mold 431 of V-section; disposing the ~olning granules of the same material between the end surfaces of these preformed tile bodles 301, 332 along the corner of the lower mold 431; and pressing them by the upper mold 432 into one body and burning it.
The manufacturing method of the present embodiment of the tile comprises: the preformed tile body forming step S561 for formlng the plate shaped preformed tlle bodies 301, 332 havlng the colored pattern thereon; the jolning granules formlng step S562 for formlng the joining granules of the same material as that of the preformed tile body 301, 332; the preformed tile body and joinlng granule disposing step S563 for disposing the preformed tile bodies 301, 332 on the opposlte slopes of the lower mold 431 of V-section an~ the ~oining granules between the end suxfaces of the preformed tile bodies along the edge of the lower mold 431; the angle tile body ~orming step S564 for pressing the preformed tlle bodles 301, 332 and the ~oining granules between the lower mold 431 and the upper mold 432 lnto one body thereby obtaining the angle tile body; the burning step S565 for burning the angle tile body.
Accordingly, it is possible to provide an angle tile having a colored pattern and a good appearance as in the twelfth embodiment. It is also possible to provlde an angle tile rein~orced by lining, since the granules are used as a lining materlal.
.

1 SIX'l ~'L~ EM~ODIMENT]
The angle tile 260 of FIG. 54(a) may be manufactured as follows. Such modification will be descrlbed referring to FIG. 69.
Thls angle tile 260 was manufactured as below according to the steps of ~he thirteenth embodiment.
First, in the preformed tile body forming step S561, only a preformed main plate body 301 was formed as in the twelfth embodlment.
Then, in the ~oining granule formlng step S562, ~oining granules were prepared by adding 1% CMC to the mixture of the white granules and the blue granules whlch were used in manufacturing the preformed main plate body 301.
Next, ln the preformed tlle body and ~oining granule dlsposlng step S563, the preformed tile body 301 was dlsposed on one slope of the lower mold 431 of V-section.
On the other hand, the ~oining granules were disposed and filled on the other slope of the lower mold 431 as well as the corner of the lower mold 431, as shown in FIG. ~9.
This filled layer of the ~oining granules had a thickness twice that of tha preformed main plate body 3~1.
Particularly, the ~olning granules were filled over the corner o~ the lower mold ~31 up to a ~x1 , thlckness of lOmm.
Then, in ~he angle tile body forming step S564, the upper mold 432 of reversed V-sectlon corresponding to the sectlon of the lower mold 431 was pressed agalnst the lower mold 431 to form an angle tile body. Trimmed parts 304 were cut off as ln the twelfth embodiment.
The burning step S565 was carrled out under ~he same condltion as the twelfth embodlment, thereby obtaining the angle tlle 260 shown in FIG. 54(a) as in the twelfth embodlment.
As mentioned above, this modification of the angle tile is maae by: disposing the plate shaped preformed tlle 2 ~ 5 ~

body 301 havlng the colored pattern on ~he one slope of the lower mold 431 and the jolnlng granules o~ the same materlal a~ th~t o~ the pre~ormed tlle ~ody 3 01 on the other slope and the corner of the lower mold 431~ and presslng them by the upper mold 432 into one body and burning lt.
The manufacturlng method of this modification comprises: the preformed tile body formlng step S561 for formlng the plate shaped preformed tile body 301 having the colored pattern; the ~oining granule formlng step S562 for forming the joinlng granules of the same material as that of the preformed tlle body 301; the preformed tlle body and ~oining granule disposing step S563 for disposlng the preformed tile body 301 on one slope of the lower mold ~31 of V-sectlon and the ~oining granules on the other slope and the corner of the lower mold 431; the angle tile body forming step S564 for pressing the pre~ormed tile body 301 and the ~oining granules between the lower mold 431 and the upper mold 432 into one body, thereby forming the angle tlle body; and the burning step S565 for burning the angle tlle body.
According to this modlficatlon, the same advantages can be obtalned, too, as in the twelfth embodiment.
In the above embodlments, the dlsposlng works of the materials ln the preformed tile body and joining bar disposlng step S553 and the preformed tile body and ~olning granule disposing tep S563 may be carried out as follows.
FIGs. 70(a) and 70(b) respectively show the case in which a ~olning bar is used. Specifically, FIG. 70(a) shows the case in which linlng powders were di~posed over a contact portlon or border line of two preformed tlle bodies 340 and the ~olning bar 343. FIG. 70(b) shows the case in whlch llnlng powders were dlsposed ln a uniform thlckness over all the two preformed tile bodies 340. Such angle tile has a corner made stronger.
FIGs. 70~c), 70(d) and 70(e) respectlvely show the case in which ~olning granules are used. Speclfically, 2 ~ 3 FIG. 70tc) shows the case in whlch the jolning granules were dlsposed as a linlng mater:Lal over the facing ends of the two preformed tlle bodles 340, in addltlon to belng filled therebetween. FIGs. 70(d) and 70(e) respectlvely show the case in which an inside end of a preformed tlle body 340 is slanted so as to facilitate fllling the ~oinlng granules between end surfaces of the preformed tile bodles 340. More ln detall, FIG. 70(cl) shows the case ln whlch the ~olning granules were filled as a lining materlal over the facing lnside end surfaces thereof. FIG. 7~(e) shows the case ln which the ~oining granule~ were ~illed over all the preformed tile bodles 340 as a liner.
FIG. 70(f) show~ the case in which the preformed tile body 340 was disposed on one slope of the lower mold 431 and the lining powders were dlsposed on the other slope and the corner of the lower mold 431, over the preformed tile body 340 and the joined part of-the preformed tile body 340 and the lining powders.
In the twelfth to sixteenth embodiments, the preformed tile body may be any other fo.rms so long as it ls plate shaped. The pattern on its surface may be desirously changed, and lf desired, it may be a plain pattern of one color. This preformed tile body may be formed by presslng a powder material or a clay body, for example, as in generally known tiles. In this case, it is preferable to set a pressure in pressing ~nto a relatlvely low value.
Thereby, the preformed tile body is further compressed when finally belng pressed into an angle shape, so as to be s~rongly ~oined to the ~oining bar or granules. However, it is not pre$erable to mold it at an excessively low pressure, slnce the obtalned colored pattern change ln presslng it lnto the angle shape. Generally, lt is preferable to set the pressure in formlng the preformed tlle body lnto one half to two thlrds of a pressure in maklng finally the angle tile body. The pressure ln presslng lt into the angle shape ls equal to a pressure for presslng common tlles or angle tlles. Preferably, the 2 1 ~

preformed tile body ls formed into a ~idth a little smaller than that of the lower mold so as to facilltate its disposing on the lower mold.
The ~oinlng bar and the ~oining yranules are ~oined integrally with the preformed tile body to define the corner of the angle tile, so that they may be made of any material inasmuch as it has the same quallty as that of the preformed tile body. "The same quality" means that the material is substantlally the same in terms of composition so that there arlse no remarkable differences in slnterlng t~mpera~ure or the like. Preferably, the ~oinlng bar or granules have the same composition, lncludlng the component of the pigment, as that of the preformed tlle body so tha~
the colored pattern of the angle tlle ls made continuous including the corner. It ls preferable to add an adhesive to thase ~oining bar or granules so as to improve a ~oining property at the time of pressure forming wlth the preformed tile body as well as to prevent cracks at the time of burning. A cellulose ether like CMC or a synthetic resln or the llke may be used.
The ~oining bar of such materlal may be ~ormed by any desired method like extruding of a clay body or pressure forming of powdars or the llke. It is preferable to make its density approxlmately the same as that of the preformed tile body in view of unlformity of the angle tile when it is flnlshed. Therefore, lt ls most preferable to form lt by a method and under a condition similar to those of the preformed tile body. The ~olning bar needs to have such a section as to be filled as close as possible between the end surfaces of the preformed tile bodies on the slopes of the lower mold.
A normal powder materlal may be used as it 18 for the ~olnlng granules. However, it ls advant~geous to use a materlal ln the form of pelletized granules. These granules can be made by addlng water to a powder material, mlxlng and crushlng it by a trommel or the like lnto a slip, and then pelletizlng it lnto granules of a 21~53 predetermined molsture content by a spray drler or the like. Since the granules are nonstlcky and smooth, lt lmproves workabllity. Moreover, the granules can flow easlly to be filled over all bletween the end surfaces of the preformed tile bodies which are disposed on the opposite surfaces of the lower mold. In case the preformed tlle body is made by pressure forming of a powder materlal, the ~olning granules may be the same as the powder material. The ~oining granules can be auxiliarily used in case a filllng state of the ~oining bar is not satisfactory between the end surfaces of the preformed tile bodles.
Whlle the preformed tile body and the jolning bar or granules are dlsposed on the lower mold of the press die which defines a pressure forming space of angle shape, the lower mold may be a V-section or a reversed V-section. In case the lower mold is a reversed V-sectlon, lt is not preferable to use the ~oining granules. In case of providing an angle tlle of relatively large size, the lower' mold ls preferably a V-sectlon. A llning powder material may be further disposed on these materials on the lower mold. Thls provides an an~le tile reinforced by the liner.
While, the angle tlle and its manufacturing method of the twelfth to sixtePnth embodiments were described, mainly taking as an example the angle tile composed of short and long tiles ~oined integrally by the rectangular corner, other modifications are posslble. For example, The tiles ~oined by the corner may have the same length or other desired length3. The corner may have a desired angle other than the right angle or may be curved.
The devlce used ln the twelfth to sixteenth embodlments is not limited to the above descrlbed one. Any type of device which has been already used in a ceramlc industry or the like may be chosen for the use. Or some change to the conventlonal device ls possible.

[ .~ V~ EMBODIMENT]
A seventeenth embodiment of the inventlon will be 2 ~ 3 described referrlng to FIGs. 71 to 76. A tile of this embodlment ls also applicable to stepped parts of stairs or roads.
In FIG. 71, An angle tlle 601 has a pair of plate tlles 602a, 602b and a corner 603 ~oining them at right angle. This tile 601 is used at the stepped part while putting the long plate tile 602a horizontally and the short plate tlle 602b vertically. The corner 603 has a surface that ls gently curved. The plate tlles 602a, 602b and the corner 603 have thelr surfaces uniformly colored as a whole. In thls embodiment, the angle tlle 601 has a spotted pattern of a light tone that green granules are scattered on a white background in a spotted manner.
In thi~ embodlment of ~he angle tile 601, a colored pattern 604 for distingulshing the corner ls provlded on the surface of each plate tile 602a, 602b. As shown in FIG. 71, a long strip of colored pattern extends in a width direction of the tile near the corner 603, in the plate tile 602a. Short strips of colored pattern extend at rlght angle to the corner 603 and are dlsposed in parallel in the width direction of the tile, ln the plate tile 602b. These patterns are colored into dark brown. These colored patterns 604 go through the tile in lts thlckness directlon, so that they are never faded nor vanished if the tile ls abraded.
In case of tiling the stepped parts of the stalrs or the roads using the angle tiles 601, the colored patterns 604 are arranged along a corner of the stepped part, thereby defining a marking for distinguishing the corner from a fla~ par~ in terms of color difference. Thus, such colored patterns 604 attract atten~ion of walkers, so that the walkers can be kept away from danger such as stumbling or the llke when they go up and down the stepped parts like stairs, thereby improvlng qafety in such going up and down.
Thls embodiment of the angle tlle 601 is manufactured by a slmllar manufacturing method to tha~ of the twelfth embodlment, ln accordance wlth the process shown in FIG.

2 1 ~ 3 55.
[PREFORMED TILE BODY FORMING STEP]
In thls embodlment, a preformed tile body is presslngly formed by use of a pressure forming machlne 610 shown in FIG. 72 and a partltlon plate 620 shown in FIG.
73. The pressure forming machine 610 ls composed of a pressure formlng dle 611, a vertically movable lower mold 612, a vertically movable upper mold 613 and a fixed frame 614.
The partltion plate 620 is composed of a square outer frame 621, a partition wall 622 disposea inside thereof and ~olnts 623 ~oining the partitlon wall 622 to the outer frame 621. The outer frame 621 ~s made lnto such a shape as to be fitted ln the pressure forming die 611 without clearance. The ~oint 623 ls made by a plate. A lower end of the ~oint 623 does not reach a lower end of the outer frame 621 and the partition wall 622. Thls partition wall 622 may be modifled in various forms accordlng to a desired patternO Depending on a form of the pattern, at least one of the outer frame 621 and the partition wall 622 may be omltted, and the partltlon plate 620 may be composed o~ the partltion wall 622 and the outer frame 621 or the ~oints 623. The partltlon plate 620 may be composed of only the partitlon wall 622.
The paxtitlon plate 6~0 may be formed by molding a synthetic resln, for example.
Such partition plate 620 was disposed in the pressure forming die 611. As shown in FIG. 72, colored granules 615a, 615b of dlfferent colors were fllled respectlvely in formlng spaces up to substantlally the same helght. In thl fllling, a proper hopper was used, since openlngs of the partitlon plate 6~0 were small.
The colored granules as a tlle forming material were prepared as follows. Namely, three klnds of crushed m~x raw materlals were prepared: a first materlal obtained by addlng 5~ whlte pigment (zircon) to a base crushed mlx raw materlal consistlng of 50% feldspar, 20% china clay and 30 2 1 ~ 3 kaolln; a second materlal obtained by adding 2% green plgment (chromlum oxlde) to the basP crushed mix raw material; a thlrd materlal obtained by addlng 2% dark brown plgment (red oxide) to the base materlal. These materlals were mixed further with 0.5~ CMC and water, and mlxed ln a trommel lnto a sllp. This slip was fed to a spray drler to be granulated and drled. Thus, there were provided whlte, green and dark brown granules which had an average grain diameter of 500ym and a moisture content of about 6%.
Simllarly, uncolored granules were prepared which had no pigments.
A mixture of 70~ white granules and 30% green granules were used for the colored granules 615a which formed whole surface of the tile. The dark brown granules were used for the colored granules 615b filled into the partition wall 622.
Thereafter, the partltion wall was ralsed and removed out of the pressure forming die 611. Then, the colored granules 615a, 615b were gently pressed to make their surface flat. The uncolored granules were further filled as a linlng material over the colored granules.
The granules in the pressure forming die 611 were pressed ~nd molded into one body between the lower mold 612 and the upper mold 613 at a pressure of 200kg/cm2. Next, a preformed tlle body which was obtalned by thls pressure forming was taken out by pulllng up the upper mold 613 and pushing up the lower mold 612 up to a take-up le~el.
Thus obtained plate shaped preformed tile body 606 is composed of a surface layer 606a made of the mlxture of colored granules 615a, a colored pattern 606b made of the colored granules 615b and a llnlng layer 606c made of the uncolored granules, as shown in FIG. 74(a).
A short preformed tlle body 606 was fabriaated by use of the same material as the preformed tile body 606 of FIG.
74(a) and a similar method thereto.
The preformed tile body 606 of FIG. 74(b) has a length of one half of the length of the one 606 of FIG. 74(a), and 21 ~'3~

forms the short plate tlle 602b of the tile 601 of FIG. 71.
A partltion plate 620 used in making the short pre~ormed tlle body 606 has three partltion walls 622 corresponding to the colored patterns 606b. Whlle the short preformed tlle body 606 was fabrlcated by a pressure formlng die of a dlmension correspondlng to a dlmenslon thereof, the pressure formlng dle 611 for maklng the long preformed tile body 606 can be used as it is. In this case, the short preformed tile body 606 is obtalned by cuttlng the long preformed tlle body 606 in half.

[JOINING BAR FORMING STEP]
A ~oinlng bar 607 was fabricated by use of the mlxture of color~d granules conslstlng of 70% whlte granules and 30~ green granules which were used for making the surface layer 606a of the preformed tlle body 606.
As shown in FIG. 75, the ~oinlng bar 607 has such a section as a bottom of an lsosceles right triangle ls formed into an arc. This sectlon is substantially equal to a sectlon of a space that is deflned between end s~rfaces of a palr of pre~ormed tlle bodles when they are dlsposed respectlvely on opposlte slopes of a lower mold of an angle tile press die described later. A length of the jolnlng bar 607 is substantially equal ~o a width of the preformed tile body 606.
The ~oining bar 607 was pressed and formea at a pressure of about 100kg/cm2 by use of a pressure forming die of a shape corresponding thereto. This pressure is lower than a pressure in presslng the preformed tile body, so that the ~oinlng bar 607 has relatlvely a llttle larger dlmension.

[PREFORMED TILE BODY AND JOINING BAR DISPOSING STEP]
The short and long pair of preformed tile bodies 606 and the Joinlng bar 607 were dlsposed on the lower mold of the angle tlle press dle.
As shown in FIG. 76, an angle tlle press dle 630 is 2 ~ 5 3 composed of a lower mold 631 of reversed V~sec~lon and an upper mold 632 of V-section.
The short and long pre~ormed t lle bodies 606 were dlsposed respectively on opposite slopes of the lower mold 631 while havlng the colored patterns 606b faced upside and placed near a peak of the lower mold 631. The joinlng bar 607 was disposed between the preformed tile bodies 606 along the peak Qf the lower mold 631. Trimmlng metal flttings 640 define a formlng space over the lower mold 631 correspondingly to a shape of an angle tile to be fabricated.
In thls step, lf there ls made a gap or clearance between the ~olning bar 607 and the preformed tile bodies 606, granules used for forming the ~olning bar 607 are preferably filled in such a gap.

. .
lANGLE TILE BODY FORMI~G STEP ]
The preformed tile bodies 606 and the ~oining bar 607 were pressed lnto one body between the lower mold 631 and the upper mold 632 to form an angle tile body. A pressure in this pressing ls approximately the same level as thP
presslng of common tiles or angle tlles, but made higher than pressures in presslng the preformed tile body and the ~olnlng bar. In this pres~ing, the preformed tlle bodles 606 and the ~olnlng bar 607 were further compre~sed to be ~oined lntegrally. In this embodlment, the pre~sure forming was carried out at a pressure of 400kg/cm2 to make the angle tile body as one body without any ~oint line.

[BURNING STEP~
The angle tile bodies were put in a chamotte sagger with a distance therebetween, and burned and ~intered in a shuttle kiln under a condition of a burning temperature o~
1250~ and a burning time of 30 hours, thereby making angle tiles as finlshed products.
Thus, the angle tile 601 shown ln FIG. 71 was obtalned.

2 1 ~ 3 While, in thls embodiment, the joining bar 607 ls the same color as the ~ur~ace layer 606a of the preformed ~ile body 606, it may be a dlfferent color so as to deflne a colored pattern at the corner of the angle tile for dlstingulshlng it. While, in thls embodlment, the surface layer 606a of the preformed tile body 606 has only the spotted pattern, a variety of patterns may be provided on the surface of the tlle by use of a plurality of colors of granules and a partition plate accordlng to a color arrangement.

[EI~n~ EMBODIMENT]
An eighteenth embodiment of the invention will bq descrlbed referrlng to FIGs. 77 to 81.
As shown in FIG. 77, an angle tlle 701 of this embodlment ls composed of a long and short pair of plate tiles 702a, 702b and a corner 703 ~oining them at right angle, as in the seventeenth embodlment of the angle tile 601. Colored patterns 704 for dlstinguishlng the corner are providsd respectively on the pla~e tiles 702a, 70~b.
The colored pattern 704 of the long plate tile 702a has a relatively large width and is formed successively from one end to the other end ln the width direction of the tlle.
These plate tiles 702a, 702b and the corner 703 have their surfaces colored unlfo~mly and provided with a spotted pattern of llght whitish gray tone that llght black ~ranules are scattered to make spots on a white background.
On the other hand, the colored pattern 704 is a spotted one of a slmllar color tone to the above color tone, but is made a ~potted pattern of relatively dark tone that the li~ht black granules are mixed ln larger amount on a white background, thereby being distlnguishable by a dlfference of lightness of the colors.
In this embodiment, a protruded area 708 is further formed on the colored pattern 704 of the long plate tlle 702a ln order to prevent slip. In the illustrated example, the protruded area 708 has a plurality of ribs each of 21~53 whlch contlnuously extends in the width dlrection of the tlle and which have a cross sectlon of a saw ~hape as a whole. The corner 703 has a curved shape whlch ls bulged out of the surface of the plate tlles 702a, 702b. Thls bulged corner 703 is provided with a plurality of grooves 709a for drainage along a curved sur~ace thereof. These grooves 709a are continuous respectlvely with grooves 709b which are formed on the ribs of the protruded area 708.
Slnce the present embodiment of the angle tlle 701 has the protruded area 708 for preventing slippage, lt ls posslble to assure more safety in going up and down stepped parts. Moreover, shade by the protruded area 708 makes the colored pattern 704 more conspicuous, thereby facilitating the corner distlngulshing effects of the colored pattern 704. Slnce the corner 703 is curved and bulged from the surface of the tile plates 702a, 702b, lt enlarges the corner strength of the angle tile. Moreover, the bulged curved shape of the corner 703 itself can give distingulshlng effects of the corner. Since the grooves 709a for dralnage are formed on the bulged corner 703, they draln water on the plate tile 702a ln cooperation with the grooves 709b of the plate tlle 702a. These grooves 709a, 709b also enlarge the dlstlnguishing effects of the corner due to their concavo-convex shapes.
Next, a manufacturlng method of the angle tlle ln the elghteenth embodiment of the invention wlll be described according to the process shown ln FIG. 61. It is basically the Rame as the manufacturing steps of the seventeenth embodiment, except the ~oining bar is substituted by ~olning granules.

[PREFORMED TILE BODY FORMING STEP]
A preformed tlle body was prepared by presslngly formlng colored granules as a tlle materlal, a~ ln the preformed tlle body forming step of the seventeenth embodlment.
FIG. 78 shows a pressure forming machine 710 used ln 2 1 ~ 3 the pressing work. ~he pressure forming machine 710 is composed of a pressure forming die 711, a vertically movable lower mold 712, a vertically movable upper mold 713 and a fixed frame 714.
This pressure forming machine 710 is dlfferent from the pressure forming machine 610 of FIG. 72 in that a concavo-convex mold surface 715 is provided on an upper surface of the lower mold 712 or a bottom surface of the pressure formtng die 711. The concavo-convex mold surface 715 serves to form rlbs for preventing slippage on a tile surface. In this embodiment, the mold surface 715 has three lines of crests extending from one lateral end to the other lateral end of the pressure forming die 711. Th~
mold surface 715 iR arranged near one longitudinal snd of the pressure formlng die 711. The mold surface 715 is further provided with pro~ections (not shown) at bottoms between the crests in order to form grooves for drainage.
The mold surface 715 is structured in an exchangeable manner on a main body of the lowsr mold 712.
A partition plate 720 shown in FIG. 79 was used in fllling the colored granules as a tile material into the pressure forming die 711, as ln the seventeen~h embodiment.
The partition plate 720 is composed of an outer frame 721 and two partition walls 722, and divided into three spaces by the two partition walls 722. ~he space deflned between the two partltion walls 722 ha~ its width and position determined so as to accommodate the concavo-convex mold surface 715 thereln.
The partition plate 720 was dlsposed ln the pressure formlng die 711. Then, colored granules 705a were fllled lnto the two outslde spaces each deflned between the outer frame 722 and the partitlon walls 722, as shown in ~IG. 78.
Colored granules 705b were fllled in the center space deflned between the two partitlon walls 722. The two kinds of colored granules 705a, 705b were fllled up to substantially the same height. Next, the partltion plate 720 was taken up and removed out o~ the pressure forming ~ 3~;~

dle 711. Thereafter, the colored granules 705a, 705b were gently pressed so as to make their surfaces even. Then, llning granules were further filled over them.
The colored granules 705a, 705b were prepared as follows, ln the same manner as those of the seventeenth embodiment. Namely, a base crushed mlx raw material consisting of 50% feldspar, 20% china clay and 30% kaolln was added with 5% white plgment (zircon) as a coloring pigment. ~hey were further added wlth 0.5% CMC and water and mlxed ln a trommel into a sllp. This sllp was put lnto a spray drier and granulated and arled. Thus, white granules of an average particle diameter of about 400~m were prepared. Similarly, 2~ black pigment (chromite) was mixed in the above base material to prepare llght black granule~ of an average partlcle dlameter of about 700pm.
Moreover, linlng granules were prepared with no pigments added lnto an averaga partlcle dlameter of about 500~m.
Each kind o~ the granules has a molsture content of about 6~.
The color~d granules 705a were composed of 80~ white granules and 20% light black granules. The colored granules 705b were composed of 60~ whlte granules and 40 light black granules.
The colored granules 705a, 705b and the lining granules were pressed and molded into one body ln the preqsure forming die at a pressure of 200kg/cm2 betwean the lower mold 712 and the upper mold 713, as in the seventeenth embodiment.
Thu~ obtained preformed tile ~ody 706 has a surface layer 706a made of the mixed colored granules 705a, a colored part 706b made of the colored granules 705b and a linlng layer 706c made of the llning granules, as shown in FIG. 80. The colored part 706b has a protruded area 706d for preventing slippage formed by the mold surface 715 of the pressure formlng die 711. The colored part 706b i~
further provided with grooves 706e for dralnage.
On the other hand, there was prepared a short 2 ~ .3 3 preformed tile body constituting the short plate tile 702b ln the angle tlle 701 of FIG. 77. Here, the short preformed tile body has a structure corresponding to that of the long one 706 of FIG. 80, so the same reference numerals as the long preformed tlle body 706 will be attached to the corresponding parts for convenience sake (see FIG. 81). The short preformed tile body was fabricated in the same manner as that of the preformed tlle body 606 of FIG. 74(b). Still, a surface layer 706a was made of mixed colored granules of 80% whlte granules and 20~ llght black granules, and colored parts 706b were made of mixed colored granules of 60% whlte granules and 40 llght black granules.

[JOINING GRANULE FORMING STEP]
The mixed colored granules of 80~ white granules and 20~ light black granules which were used in fabricating the preformed tile body 706 and the surface layer 706a were used for ~olning granules as they were.

~PR~FORMED TILE BODY AND JOINING GRANULE DISPOSING STEP]
The long and short preformed tlle bodies 706 and the ~olnlng granules were alsposed on a lower mold of an angle tile press die.
In FIG. 81, an angle tile press die 730 is composed of a lower mold 731 of V-section and an upper mold 732 of reversed V-sectlon.
The lower mold 731 has a mold surface 733 that i9 the same shape as that of the concavo-convex mold surface 715 of the pressure forming die 711. Thls concavo-convex mold surface 733 has ribs whlch correspond to the 811p preventlng protruded area 706d of the long preformed tile body 706. Thus, lt prevents the protruded area 706d from deformlng at the time of pressing step. Compressed deformation of the preformed tile body 706 ls not very large ln pressing, so that such a concavo-convex mold surface 733 is not always necessary depending on a shape of 2 ~ 5 3 the protruded area 706d. Whlle, ln this embodlment, the mold surface 733 is integrally formed on a sur~ace o~ the lower mold 731, it may be ln such a form as to pack dents of the protruded pattern 706 and deflne a flat surface.
A lowermost edge part or a bottom 734 of the lower mold 731 has a cross section that is curved and bulged downward. Protruslons 735 are provlded along a curved surface of the bottom 734 so as to form the grooves 709a for drainage. Though not shown ln FIG. 81, one of the slopes of the lower mold 731 has protrusions formed continuously with the protruslons 735. These protruslons (not shown) have a shape corresponding to that of the draining grooves 706e of the long preformed tile body 70~
and fitted thereln. These protrusions (not shown) are provlded princlpally for preventing the ~oining granules from lntruding lnto the dralning grooves 706e. Therefore, these protrusions need not be formed over all the full length of the groove 706e.
As shown in FIG. 81, a pair of long and short preformed tlle bodles 706 were disposed on the opposlte surfaces of the lower mold 731 whlle their colored surface situated downward. Then, the ~oinlng granules were fllled between the end surfaces of the preformed tile bodles 706 along the bottom 734 of the lower mold 731.
In thls fllling the Joinlng granules, the short preformed tile body 706 was moved upward a little along the slope of the lower mold 731 whlle the end metal fittings 640 was removed. Then, the ~oinlng granules were thrown lnto between the pre~ormed tile bodies 706 through a hopper or a slmllar frame. Thereafter, the short preformed tlle body 7~6 was pushed downward along the slope of the lower mold 731. The Joining granules were disposed in an excesslve amount over the bottom 734 of the lower mold 731, taking compression in pressing lnto account.

lANGLE TILE BODY FORMING STEP, BURNING STEP]
An angle tlle body ~ormlng step and a burniny step are 2~ ~3~3 ~ust the same as the seventeenth embodlment.
Thus, the angle tile 70:l shown ln FIG. 77 was obtained. The angle tlle 701 has the colored pattern 704 formed up to a sufficient depth in the thickness directlon thereof and made into one body with the other part thereof.
Accordingly, lf the tile is abraded strongly, the colored pattern 704 is never vanished nor peeled off.
In this embodiment, the colored granules for the surface layer 706a of the preformed tile body 706 are used for the ~oining granules as they are so that the same color ls given to the area from the corner to the plate tiles o~
the tlle. However, the ~oinlng granules may be a different color tone from that of the colored granules, so that corner distlngui~hlng colored pattern is provided on the corner of the tlle. While, in this embodiment, the surface layer 706a of the preformed tile body 706 is g~ven a simple spotted pattern, plural colors of granules and an appropriate partition plate may be used so that varlous patterns are formed on the tile surface.
This embodlment provides an angle tile having a thick corner distlngulshing colored pattern, that is difficult to obtain ln conventlonal angle tile press dies, and slip preventlng protrusions.
While, ln thls embodiment, the sllp preventing protruded area 708 ls formed lnto a section of a saw, it may have any other shapes. Some modifications will be shown ln FIGs. 82(a) to 82(c). FIG. 82(a) lllustrates a sllp preventing protruded area 801 which has rectangular protruslons provlded in two row~, while each row belng arranged along a width direction of a tile. The protruslons of one row are posltloned diagonally to those of the other row. FIG. 82(b) lllustrates a slip preventing protruded area 802 whlch haq clrcular protruslons provlded ln two rows, while each row belng arranged along a wldth directlon of a tlle. The pro~ruslons of one row are diagonally dlsposed to those o~ the other row. FIG~ 82(c) shows a sllp preventlng protruded pattern 803 which has 210~3 ., grooves of V-section provided laterally and longitudinally o~ a tile, thereby forming concaves and convexes.
The preferred embodiments descrlbed herein are therefore illustratlve and not restrictive, the scope of the lnvention being lndlcated in the appended claims and all variatlons whlch come wlthin the meaning of the claims are intended to be embraced therein.

Claims

1. A method for manufacturing an accessory tile having a three-dimensional shape composed of a plurality of plate portions, comprising the steps of:
forming a plurality of preformed tile blanks of a plate shape corresponding to a shape of the plate portion, while providing at least one of the preformed tile blanks with a design composed of a plurality of colored portions corresponding to the design of the tile portion;
disposing the preformed tile blanks on a pressure forming die having a shape corresponding to the shape of the accessory tile while facing one end surfaces of the adjoining preformed tile blanks to each other with a gap;
disposing a joining tile material in the gap between the adjoining preformed tile blanks;
pressing the preformed tile blanks and the joining tile material by the pressure-forming die, thereby joining the preformed tile blanks via the joining tile material so that the preformed tile blanks and the joining tile material are integrally formed into one body of a shape corresponding to the shape of the accessory tile; and firing the integrally-formed preformed tiles blanks and the joining tile material, thereby making the accessory tile;

whereby at least one of the plate portions of the accessory tile is provided with a design composed of a plurality of colored portions corresponding to the design of the colored portions of the preformed tile blank.

2. A method for manufacturing an accessory tile having an angle shape composed of a first and a second plate portions, comprising the steps of:
pressing a tile material to form a first preformed tile blank of a plate shape corresponding to a shape of the first plate portion;
pressing a tile material to form a second preformed tile blank of a plate shape corresponding to a shape of the second plate portion, at least one of the first and second preformed tile blanks being provided with a design composed or a plurality of colored portions;
disposing the first and second preformed tile blanks in a forming space of a press forming die having an angle shape corresponding to the angle shape of the accessory tile while facing one end surfaces of the preformed tile blanks to each other with a gap;
disposing a joining tile material in the gap between the facing one end surfaces of the preformed tile blanks;
pressing the preformed tile blanks and the joining tile material by the press forming die, thereby joining the preformed tile blanks via the joining tile material so that the preformed tile blanks and the joining tile material are integrally formed into one body of the angle shape of the forming space of the press forming die; and firing the integrally formed preformed tile blanks and the joining tile material, thereby making the accessory tile;
whereby at least one of the plate portions is provided with a design composed of a plurality of colored portions corresponding to the design composed of the colored portions of the preformed tile blank.

3. A method for manufacturing an accessory tile according to claim 2, wherein the tile material pressing step for the preformed tile blank provided with the design composed of a plurality of colored portions includes the steps of:
disposing different colors of tile materials into an inside space of a pressure-forming die while dividing the from each other in a planar direction of the inside space and while each color of the tile materials extend from one side to an other side of a thickness direction of the inside space; and pressing and forming integrally the tile materials into the preformed tile blank in the inside space so that the colored portions go through the preformed tile body in a thickness direction thereof.

4. A method for manufacturing an accessory tile according to claim 2 or 3, wherein:
the joining tile material comprises a joining bar having a shape of the gap between the facing end surfaces of the preformed tile blanks disposed on the press forming die;
the joining bar is formed by pressing a tile material into the shape of the gap; and the joining tile material disposing step comprises the step of disposing the joining bar between the facing one end surfaces of the preformed tile blanks so as to fill the gap therebetween;
whereby the joining bar forms a corner portion of the angle shaped accessory tile after the firing step.

5. A method for manufacturing an accessory tile according to claim 4, wherein the tile material of the joining bar and the tile materials of the first and second preformed tile blanks have same composition and same quality.

6. A method for manufacturing an accessory tile according to claim 5, wherein a density of the joining bar and a density of the preformed tile bodies are substantially same.

7. A method for manufacturing an accessory tile according to claim 4, 5 or 6, further including the step of disposing joining granules made of a tile material on the joining bar filling the gap between the preformed tile blanks in the preformed tile blank disposing step.

8. A method for manufacturing an accessory tile according to any one of claims 4 to 7, wherein the tile material of the joining bar is added with an adhesive.

9. A method for manufacturing an accessory tile according to claim 2 or 3, wherein:
the joining tile material comprises joining granules made of a tile material; and the joining tile material disposing step includes the step of filling the gap between the facing one end surfaces of the preformed tile blanks with the joining granules while keeping the gap in a fixed state.

10. A method for manufacturing an accessory tile according to claim 9, wherein:
the forming space has a V-section and the press-forming die comprises an upper mold and a lower mold between which the forming space of the V-section is defined; and the joining granule filling step includes the steps of:

interposing a frame, which has an inside space for guiding and holding the joining granules, between the preformed tile blanks while keeping the gap therebetween in the fixed state by the frame;
filling the inside space of the frame with the joining granules while guiding the joining granules by the frame;
and removing the frame so as to fill the gap between the preformed tile blanks while making the preformed tile blanks approach to each other along the V-sectional slopes of the lower mold.

11. A method for manufacturing an accessory tile according to claim 9 or 10, wherein the joining granules are added with an adhesive.

12. A method for manufacturing an accessory tile according to any one of claims 2 to 11, wherein in the preformed tile blank disposing step, trimming means of a plate shape is disposed at the other end of at least one of the adjoining preformed tile blanks in contact therewith, the trimming means having a same thickness as a preformed tile blank pressed in the pressing step.

13. A method for manufacturing an accessory tile according to any one of claims 2 to 12, further including the step of disposing granules of a tile material wholly on one surface, in a thickness direction, of the preformed tile blanks joined via the joining tile material, after the preformed tile blank disposing step and before the pressing step, thereby forming a lining layer on the overall surface of the preformed tile blanks joined by the joining tile material in the pressing step.

14. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the preformed tile blank forming step includes the steps of:
preparing a different colors of bars from a tile material piling the colored bars;
cutting the piled colored bars in a thickness larger than the thickness of the preformed tile blank so as to form a group of different colors of cut pieces; and pressing the cut pieces into one body so as to define the first and second preformed tile blanks of mottled pattern.

15. A method for manufacturing an accessory tile according to claim 14, wherein the joining tile material comprises a joining bar having a shape of the gap between the facing end surfaces of the preformed tile blanks disposed on the press forming die; and the joining bar is formed by preparing a different colors of bars from a tile material, cutting the bars into pieces, kneading the cut pieces so as to form a body of mottled pattern, and extruding and cutting the kneaded body into a shape of the gap between the adjoining preformed tile blanks so as to define the joining bar.

16. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the joining tile material comprises joining granules made of a tile material; and the joining tile material disposing step comprises the steps of:
filling the gap between the facing one end surfaces of the preformed tile blanks with the joining granules while keeping the gap in a fixed state; and disposing same granules as the joining granules on an overall surface in a thickness direction of the adjoining preformed tile blanks, thereby forming a lining layer on the overall surface of the adjoining preformed tile blanks joined by the joining tile material in the pressing step.

17. A method for manufacturing an accessory tile according to claim 2 or 3, wherein one end of the preformed tile blank has substantially a rectangular shape so that the gap defined between the facing one end surface of the adjoining preformed tile blanks in the preformed tile blank disposing step is substantially a square section, and the joining bar has a square section corresponding to the square section of the gap.

18. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the forming space has a V-section and the press forming die comprises an upper mold and a lower mold between which the forming space of the V-section is defined, and one end of the preformed tile blank has a slanted shape so that the gap defined between the facing one end surface of the adjoining preformed tile blanks in the preformed tile blank disposing step is opened upward toward the upper mold.

19. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the tile material pressing step for the preformed tile blank is performed under a pressure one half to two thirds of a pressure in the preformed tile blank pressing step.

20. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the accessory tile of the angle shape is used for a stepped part, and the preformed tile blank forming step includes the step of providing one of the preformed tile bodies with a colored stripe portion along the one end of one of the preformed tile bodies.

21. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the joining tile material has a different color from the colors of the tile material of the preformed tile bodies, the joining tile material being pressed into a corner portion between the preformed tile bodies and defining a colored pattern along the one ends of the preformed tile bodies.

22. A method for manufacturing an accessory tile according to claim 2 or 3, wherein the preformed tile blank forming step comprises the step of providing one of the preformed tile bodies with a protruded area along the one end.

23. A tile obtained by the method defined in any one of claims 1 to 22.

24. A method for manufacturing a tile having a pattern, comprising:
a partition plate disposing step for disposing a partition plate in an inside space of a pressure-forming die so as to divide the inside space into a plurality of forming spaces in a planar direction of the inside space;

a colored granule filling step for wholly filling the plurality of forming spaces with different colors of colored granules while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space, each color of the colored granules being prepared by granulating a raw material into such a predetermined diameter that the colored granules wholly fill each of the plurality of forming spaces while being prevented from intruding into an adjacent forming space by the partition plate;
a partition plate removing step for taking out the partition plate from the pressure-forming die after filling the forming spaces with different colors of colored granules;
a pressure forming step for pressing and forming integrally the different colors of colored granules into a molded body in the inside space; and a firing step for firing the molded body.

25. A method for manufacturing a tile having a pattern, comprising:
a colored granule disposing step for disposing a plurality of different colors of colored granules into an inside space of a pressure-forming die while dividing them from each other in a planar direction of the inside space and while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space;
a lining granule filling step for filling lining granules over the colored granules in the inside space;
a pressure forming step for pressing and forming integrally the different colors of colored granules and the lining granules into a molded body in the inside space; and a firing step for firing the molded body.

26. A method for manufacturing a tile having a pattern, comprising:
a lining granule filling step for filling lining granules into an inside space of a pressure-forming die;
a colored granule disposing step for disposing a plurality of different colors of colored granules over the lining granules in the inside space of the pressure forming die while dividing them from each other in a planar direction of the inside space and while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space;
a pressure forming step for pressing and forming integrally the lining granules and the different colors of colored granules into a molded body in the inside space; and a firing step for firing the molded body.

27. A method for manufacturing a tile having a pattern, comprising:
a partition wall forming step for forming a partition wall by molding a clay body into a predetermined moisture content;
a partition wall disposing step for disposing the partition wall in an inside space of a pressure forming die so as to divide the inside space into a plurality of forming spaces in a planar direction of the inside space;
a colored granule filling step for filling the plurality of forming spaces with different colors of colored granules while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space;
a pressure forming step for pressing and forming integrally the partition wall and the different colors of colored granules into a molded body in the inside space;
and a firing step for firing the molded body.

28. A method according to claim 27, further including, between the colored granule filling step and the pressure forming step, a lining granule filling step for filling lining granules over the colored granules and the partition wall in the inside space, the molded body being made by pressing and forming integrally the colored granules, the partition wall and the lining granules in the pressure forming step.

29. A method according to claim 28, further including, between the partition wall forming step and the colored granule filling step, a partition wall sticking step for sticking a sheet material to the partition wall, the sheet material being disposed in the inside space together with the partition wall in the partition wall disposing step.

30. A tile having a pattern made by:
disposing a partition plate in an inside space of a pressure forming die so as to divide the inside space into a plurality of forming spaces in a planar direction of the inside space;
wholly filling the plurality of forming spaces with different colors of colored granules while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space, each color of the colored granules being prepared by granulating a raw material into such a predetermined diameter that the colored granules wholly fill each of the plurality of forming spaces while being prevented from intruding into an adjacent forming space by the partition plate;

intruding into an adjacent forming space by the partition plate;
taking out the partition plate from the pressure forming die after filling the forming spaces with different colors of colored granules;
pressing and forming integrally the different colors of colored granules into a molded body in the inside space;
and firing the molded body.

31. A tile having a pattern made by:
disposing a plurality of different colors of colored granules into an inside space of a pressure-forming die while dividing them from each other in a planar direction of the inside space and while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space;
filling lining granules over the colored granules in the inside space;
pressing and forming integrally the different colors of colored granules and the lining granules into a molded body in the inside space; and firing the molded body.

32. A tile having a pattern made by:
filling lining granules into an inside space of a pressure forming die;
disposing a plurality of different colors of colored granules over the lining granules in the inside space of the pressure forming die while dividing them from each other in a planar direction of the inside space and while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside space;
pressing and forming integrally the lining granules and the different colors of colored granules into a molded body in the inside space; and firing the molded body.

33. A tile having a pattern made by:
disposing a partition wall in an inside space of a pressure-forming die so as to divide the inside space into a plurality of forming spaces in a planar direction of the inside space, the partition wall being molded of a clay body into a predetermined moisture content;
filling the plurality of forming spaces with different colors of colored granules while having each color of the colored granules extend from one side to an other side of a thickness direction of the inside spaces;

pressing and forming integrally the partition wall and the different colors of colored granules into a molded body in the inside space; and firing the molded body.

34. A tile according to claim 33, in which the molded body is made by filling lining granules over the colored granules and the partition wall in the inside space, and pressing and forming integrally the colored granules, the partition wall and the lining granules.

35. A method for manufacturing a tile having a pattern, comprising:
a molded preform block making step for making molded preform blocks of different colors by a raw material kneading step for kneading a raw material mixed powder, a pigment and water to prepare a plurality of colored clay bodies of different colors of a predetermined moisture content, a base material molding step for molding each color of the colored clay bodies into a colored base material of a fixed thickness, and a joining step for joining a plurality of colored base materials of different colors in its thickness direction into one body;
a molded preform block disposing step for disposing the different colors of molded preform blocks into an inside space of a pressure-forming die while dividing them from each other in a planar direction of the inside space and while having each color of the molded preform block extend from one side to an other side of a thickness direction of the inside space;
a pressure forming step for pressing and forming integrally the different colors of molded preform blocks into a molded body in the inside space; and a firing step for firing the molded body.

36. A tile according to claim 35, in which:
the joining step comprises a gathering and piling step for gathering and piling a plurality of base materials of different colors, and a cutting step for cutting the gathered and piled base materials in the gathering and piling direction into a constant width thereby making the block; and the molded body is made by disposing and pressing the blocks in the inside space while a cutting surface of the block being faced vertically.

37. A tile according to claim 36, in which the base materials are joined together via an adhesive in the joining step.

38. A tile according to claim 37, in which the adhesive is coated on a joint surface of the base materials in an adhesive coating step before the gathering and piling step.

39. A tile according to claim 37, in which the adhesive is kneaded in the colored clay bodies in kneading step.

40. A tile according to any one of claims 36 to 39, in which:
the base material has a plate shape; and the base materials are piled up on each other in its thickness direction in the gathering and piling step, then coiled in a deforming step, and thereafter cut in a radial direction thereof in the cutting step, thereby making the block.

41. A tile according to claim 37, 38 or 39, in which the adhesive is selected from the group consisting of methyl cellulose, carboxymethyl cellulose sodium and a synthetic resin.

42. A tile according to claim 35, in which:
the base material has a bar shape;
the joining step is a twisting step for gathering, twisting and joining the base materials of different colors into the block; and the molded body is made by disposing the block in the inside space in the planar direction and pressingly forming the block therein before the pressure forming step.

43. A tile according to claim 42, in which the base materials are joined together via an adhesive.

44. A tile according to claim 43, in which the adhesive is coated on a joint surface of the base materials in an adhesive coating step before the twisting step.

45. A tile according to claim 43, in which the adhesive is kneaded in the colored clay bodies in the raw material kneading step.

46. A tile according to claim 43, in which the adhesive is selected from the group consisting of methyl cellulose, carboxymethyl cellulose sodium and a synthetic resin.

47. A tile according to any one of claims 42 to 46, in which the colored clay bodies have reinforcing fibers mixed therein.

48. A tile having a pattern made by:
making preformed mold blocks of different colors by kneading a raw material mixed powder, a pigment and water to prepare a plurality of colored clay bodies of different colors of a predetermined moisture content, molding each color of the colored clay bodies into a colored base material of a fixed thickness, and joining a plurality of colored base materials of different colors in its thickness direction into one body;
disposing the different colors of preformed mold blocks into an inside space of a pressure-forming die while dividing them from each other in a planar direction of the inside space and while having each color of the preformed mold block extend from one side to an other side of a thickness direction of the inside space;
pressing and forming integrally the different colors of preformed mold blocks into a molded body in the inside space; and firing the molded body.

49. A tile according to claim 48, in which the molded body is made by gathering, piling and joining a plurality of base materials of different colors, cutting the joined base materials in the gathering and piling direction into a constant width thereby making the block, and disposing and pressing the blocks in the inside space while a cutting surface of the block being faced vertically.

50. A tile according to claim 49, in which the base materials are joined together via an adhesive.

51. A tile according to claim 50, in which the adhesive is coated on a joint surface of the base materials before joining them.

52. A tile according to claim 50, in which the adhesive is added in the colored clay bodies.

53. A tile according to any one of claims 49 to 52, in which the base material has a plate shape, and the block is made by piling up the base materials on each other in its thickness direction, coiling the piled base materials, and cutting the coiled base materials in a radial direction thereof.

54. A tile according to claim 50, 51 and 52, in which the adhesive is selected from the group consisting of methyl cellulose, carboxymethyl cellulose sodium and a synthetic resin.

55. A tile according to any one of claims 48 to 52, in which the base material has a bar shape, the block is made by gathering, twisting and joining the base materials of different colors, and the molded body is made by disposing the block in the inside space in the planar direction and press forming the block therein.

56. A tile according to claim 55, in which the base materials are joined together via an adhesive.

57. A tile according to claim 56, in which the adhesive is coated on a joint surface of the base materials before twisting them.

58. A tile according to claim 56, in which the adhesive is added in the colored clay bodies.

59. A tile according to claim 56, 57 or 58, in which the adhesive is selected from the group consisting of methyl cellulose, carboxymethyl cellulose sodium and a synthetic resin.

60. A tile according to any one of claims 55 to 59, in which the colored clay bodies have reinforcing fibers mixed therein.