JP2908667B2 - Ceramic products and their manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to floors for bathrooms, toilets, etc.
Tiles installed on sidewalks, parks, or entrances,
Artificial cobblestones to be laid in passageways, garden ponds, bathroom floors, graveyards, etc. The present invention relates to an unglazed ceramic article which retains its initial clear pattern even with strong wear, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, ceramic products such as unglazed tiles are formed by adding or not adding a pigment to form a kneaded material, forming the same into a predetermined shape, drying the formed body, and firing the formed body. However, such ceramic articles are generally poor in color and unsatisfactory in decorativeness.

[0003] In particular, a speckled pattern in which colored particles are scattered in a speckled shape gives a pale coloring feeling and has a natural texture, and is one of the patterns that have been favored for a long time.
Conventionally, such a spot pattern is generally formed by mixing a rock powder or granular material into a clay. However, according to this method, the rock loses water of crystallization in a high temperature state and discolors. Therefore, even if a rock powder of a predetermined color is used, the color of the rock powder after firing of the molded body of the clay is the original color. And it was difficult to get clear and desired colors.

[0004] In this regard, according to the method of glaze which has been generally used as a coloring method for ceramic articles for a long time, bright and colorful patterns including spot patterns can be applied to ceramic articles. However, the method using this glaze has a problem that the glaze has a thickness of about 0.1 to 0.3 mm, and in the case of floor tiles or the like, the glaze is easily bald due to abrasion. In such a case, there is also a problem that it becomes slippery and dangerous.

[0005] As a method of solving the problem caused by the glaze and applying a pattern to the unglazed tile, an inlaying method is already known. This inlaying method is a method of preparing a pattern of colored kneaded clay in advance, embedding it in the surface of the substrate, and sintering it.
Japanese Patent Publication No. 50-20962, Japanese Patent Publication No. 2-42323
Gazette, JP-A-2-239905, JP-A-2-2-2
No. 41703, and the like. Then, according to this inlaying method, unglazed tiles having various patterns can be obtained. However, the variety of patterns that can be obtained is still limited, and its manufacture is relatively troublesome.

[0006]

In view of the above, as a method of forming a pattern, particularly a speckled pattern, on an unglazed ceramic article, a colored clay is granulated, and a dried colored powder or granule is used.
A method is conceivable in which this colored powder is mixed with a clay body to obtain a ceramic product. According to this method, it is possible to easily obtain a spotted ceramic article in which the colored powder particles appear in a dot shape. However, this method does not pose any problem in the case of manufacturing ceramic articles by a dry method, since it is only necessary to mix the colored powder and granules into the dry powder of the clay body and press-mold them integrally. In the case of, the dried colored powder granules are formed together with the dried powder of the kneaded clay into a kneaded clay having a predetermined moisture content.
In particular, when the time from when the kneaded clay is formed to when it is dried and fired is long, the colored powdery granules are dissolved in the kneaded clay and soak, and as a result, a spot pattern formed is unclear. And sometimes there is a problem that a pattern like a blurred stain is formed in a stripe pattern.

Therefore, the present invention solves this problem by pre-firing the colored powder, which has a clear spot pattern, and the spot pattern is weakened by long-term high-wear. It is an object of the present invention to provide a non-glazed ceramic article which does not disappear and does not slip even when wet with water, and a method for producing the same.

[0008]

A ceramic article according to the present invention is obtained by granulating a colored clay, drying the clay, and then mixing the calcined colored powder with a predetermined moisture content into a predetermined shape. , Dried and fired.

Further, the method for manufacturing a ceramic article according to the present invention comprises a step of forming a kneaded clay having a predetermined moisture content by mixing a colored kneaded clay, granulating the dried kneaded clay, and then drying the resulting mixture. ,
It comprises a compact forming step of forming the compact to form a compact having a predetermined shape, and a drying and firing step of drying and firing the compact.

[0010]

In the ceramic article of the present invention, the appearance of a speckled pattern is obtained by the appearance of the colored powdery granules as speckles. Since the colored powder is fired, it does not dissolve or permeate into the clay having a predetermined moisture content, and forms clear spots. In addition, since the colored powder particles are uniformly dispersed and mixed in the kneaded clay, even in the case of long-term strength wear, the initial clear spot pattern is retained, and does not fade or disappear. . Furthermore, since it is unglazed, it does not slip easily even when wet with water.

In the method for producing a ceramic article according to the present invention, the above-mentioned ceramic article can be obtained by a simple process including a clay forming step, a compact forming step, and a drying and firing step.

Here, the colored powder is formed from colored clay, and any pigment such as iron oxide or chromium oxide can be used as the pigment for the coloring, and the clay itself is pure. In the case of a color tone, the use of a pigment can be omitted. Note that it is preferable to add an adhesive such as CMC to the kneaded clay in order to improve the shape retention during drying and firing. The kneaded material is granulated, dried, and then fired using an appropriate device such as a spray dryer, but the firing need not be complete, and the firing is incomplete, for example, semi-fired. There can be.

[0013] Generally, such colored powders having a size of about 100 microns to 4 mm are used.
It can be used as needed. In addition, the colored powder can be mixed into the clay forming the ceramic article at an arbitrary ratio according to a desired spot pattern. The substrate may also form spots. Also, this colored powder
Two or more different colors may be used in combination.

[0014] The kneaded clay into which the colored particles are mixed as described above is
It is adjusted to a predetermined moisture content. The predetermined moisture content is based on the degree of plasticity required for the kneaded clay when the kneaded clay is formed to form a predetermined molded body.
15% to 25%. Then, such a kneaded clay is formed, and a molded body having a predetermined shape and size, that is, a tile,
Any desired shaped body can be formed, from a cobblestone to a large one like a tombstone, or a special shape like a lantern. Then, the formed body is dried and fired in a usual manner.

According to one aspect of the present invention, the kneaded clay into which the colored powdery granules are mixed is formed in a rod shape in advance, and the formed rod-shaped base material is cut into a predetermined size, and the cut mass is cut. From the above, a predetermined molded body is formed. According to one aspect, the rod-shaped base material is formed by stacking a plurality of different-color plate-like bodies and winding the same, and according to another aspect, a plurality of different-color plate-like bodies. It is formed by laminating bodies and cutting them. According to another aspect, the rod-shaped substrate is formed by accumulating a plurality of rods of different colors. Further, according to another aspect, a plurality of different-color plate-like bodies are laminated, a rod-shaped base material formed by cutting the same, and a rod-shaped base material formed by accumulating a plurality of different-color rod-like bodies, Further twisted or twisted. These aspects are described in detail with the examples below.

[0016]

EXAMPLES Examples of the present invention will be described below. Prior to that, an example of producing a colored powder used in the present invention will be described.

<Production Example of Colored Granules> FIG. 22 is a schematic view of an example of a production apparatus for producing colored particles from colored clay, and 51 is a tron mill for forming colored clay. , 52 is a supply pump, 53 is a spray dryer, 54
Is a shuttle kiln. Using such a device,
A colored powder was produced as follows.

Feldspar 50%, pottery stone 20%, kaolin 30%
100 kg of a clay body made of was charged into a tron mill 51 containing a large number of alumina balls, and 100 l of water and 2 kg of chromium oxide as a coloring pigment were further added and mixed with stirring for 2 hours. Next, the mixed solution was taken out and the CMC was weighed 0.3 kg.
And spray dryer 5 using feed pump 52.
3 was sent to the top. The mixed liquid supplied to the spray dryer 53 was dispersed by centrifugal force while falling along gravity while rotating along the inclined wall, and was indirectly heated by steam to be dried and solidified. As a result, 110 kg of a green granulated dried product was obtained. Subsequently, the dried granulation is transferred to the shuttle kiln 54.
And calcined at 1200 ° C. for 4 hours to obtain a green colored colored powdery granule 10 of about 300 μm to 1 mm.
0 kg was obtained.

As described above, the colored powdery granules are produced by granulating the colored clay, drying and baking, and as described above, the baking there involves mixing of the colored powdery granules. Since the formed body of the kneaded clay is finally fired, it is not always necessary to perform the firing completely, and for example, it may be semi-fired. The present invention is not limited to this embodiment, and can use appropriate equipment to produce powders and granules having appropriate colors and sizes.

First Embodiment First, a first embodiment of the present invention embodied in a tile having a speckled pattern and a method for manufacturing the same will be described with reference to FIGS.

FIG. 1 is an external view showing a tile according to a first embodiment of the present invention.

In FIG. 1, a tile 1 is a mixture of colored powders 2 on a white background, and has a spot-like appearance. This colored powder 2 granulates the colored clay and after drying,
It is fired and its color is arbitrary, but is green in this example. And this colored powder 2
Is kneaded in advance with the kneaded material from which the tile 1 is formed, so that it is uniformly dispersed and mixed not only on the surface of the tile 1 but also inside. Therefore, even if the tile 1 is sliced on any plane parallel to the surface or cut at any part, a spotted pattern always appears.

The tile 1 having the spotted pattern was manufactured as follows.

FIG. 2 is a process diagram showing a manufacturing process of a tile having a speckled pattern according to the present embodiment. In FIG. 2A, a fired colored powder and a kneaded material are sufficiently kneaded to obtain a kneaded material having a uniform predetermined moisture content. The clay forming step of forming the soil, B is a step of forming the rod into a rod shape, and a rod-shaped substrate forming step of forming a rod-shaped substrate. C is a step of cutting the rod-shaped substrate into a predetermined width, and the cut mass is formed. A molded body forming step of molding the piece into a predetermined shape to form a molded body, and D is a drying and firing step of drying and firing the molded body. FIG. 3 is a schematic view of a continuous manufacturing machine used in the kneaded clay forming step A and the rod-shaped base material forming step B of FIG.
11 is a mixer for mixing various materials forming the clay, 12
Is a kneading machine for kneading the mixed kneaded material more sufficiently.
Reference numeral 3 denotes an extruder for extruding the kneaded clay having a predetermined moisture content into a rod shape, and reference numeral 14 denotes a die of the extruder 13.
FIG. 4 is a perspective view showing the rod-shaped substrate formed in the rod-shaped substrate forming step B of FIG. 2, and 3 is the rod-shaped substrate. FIG. 5 is FIG.
Schematically shows a step of forming a cut piece into a predetermined shape in a formed body forming step C, wherein 4 is the cut piece, 20 is a press machine, and 21 is a forming dish. .

First, in the clay forming step A, feldspar 50
%, 20% of pottery stone and 30% of kaolin, and 25 kg of the green colored powder obtained in the above-described embodiment and 12 l of water were added to 25 kg of the kneaded clay base material mixed powder, and the continuous production shown in FIG. It was charged into the mixer 11 of the machine 10. Then, after the charged kneaded material is sufficiently mixed by the mixer 11, the kneaded material is guided to a kneader 12 connected to a lower portion thereof.
In 2, the clay material was further kneaded sufficiently. This allows
A clay having a water content of about 20% and a green colored powder body 2 uniformly dispersed in a white clay body was formed.

Next, in the rod-shaped base material forming step B, the kneaded material formed by sufficiently dispersing the green colored powder 2 in the kneader 12 is extruded by the extruder 13 provided in the lower part thereof.
And was extruded in the direction of the outlet by the forward rotation of a screw (not shown) arranged therein, and extruded from a mouthpiece 14 having a 40 mm square opening provided at the outlet of the extruder 13. Thus, as shown in FIG. 4, a 40 mm square rod-shaped base material 3 made of kneaded material in which the colored powder particles 2 are dispersed.
I got The rod-shaped substrate 3 formed in this manner can be stored as appropriate, for example, by applying a compress to prevent evaporation of water.

Next, in the molded article forming step C, the rod-shaped substrate 3 is vertically cut with a piano wire at a width of 15 mm using a two-dot chain line in FIG. Lumps 4 were formed. And this massive piece 4
As shown in FIG. 5, four pieces were placed side by side on a forming plate 21 having a size of 85 mm square, and 5
Pressing was performed at a pressure of 0 kg / cm ² to form an 85 mm square tile compact in which the four massive pieces 4 were integrated with each other. In this embodiment, one molded body of one tile is formed using four massive pieces 4. However, one massive piece is formed according to the size of the finished tile and the cross-sectional dimension of the rod-shaped base material 3. 4 to 1
It is also possible to form a molded body of individual tiles, as well as to form two or more massive pieces 4.

Then, in the drying and firing step D, the thus obtained tile molded body was dried at 200 ° C., and then fired at 1200 ° C. for 30 hours. During the drying and baking, the molded product of the tile having a size of 85 mm square shrank to about 75 mm. Then, a tile 1 shown in FIG. 1 was obtained, in which green colored powdery granules 2 were arranged in spots on a white background. The fired tile 1 can be given a gloss by appropriately polishing its surface.

As described above, in the tile 1 of the present embodiment, the colored clay is granulated, dried, and then the rod-shaped substrate 3 made of the clay having a predetermined moisture content mixed with the baked colored powder 2 is prepared. And cut the massive piece 4 into a tile shape,
It is fired after drying.

Therefore, according to the present embodiment, since the colored powdery granules 2 are baked in advance, they are not dissolved or exuded into the kneaded clay and form clear spots. And since the colored powdery granules 3 are uniformly dispersed and mixed in the kneaded clay, even with long-term strength wear,
Its initial clear spots are retained and do not fade or disappear. In addition, since no glaze is used on the tile surface, the surface is rough and hard to slip even when wet with water in a bathroom, a sidewalk, or the like, and it is safe.

Further, in this embodiment, the rod-shaped base material 3 is formed in advance from the kneaded clay into which the colored powdery granules 2 are mixed.
Is cut to form a molded body of a tile from the cut mass pieces 4, so that the rod-shaped base material 3 can be easily cut into a predetermined size, and the shape, size and pattern are uniform. It can be a tile.

In the method of manufacturing a tile according to the present embodiment, the colored clay is granulated, dried and then mixed with the fired colored powder 2 to form a clay having a predetermined moisture content. And a rod-shaped substrate forming step B of forming a rod-shaped substrate 3 from the kneaded material
Cutting the rod-shaped base material 3 into a predetermined size, forming the cut mass piece 4 into a predetermined shape to form a tile molding, and drying the molding. And drying and firing step D for firing.

Therefore, according to the present embodiment, the kneaded clay forming step A, the rod-shaped base material forming step B, and the compact forming step C
And a simple process consisting of the drying and firing step D, ceramic tiles can be easily manufactured, and mass production is possible. Particularly, a rod-shaped substrate forming step B
Is provided, it becomes easy to control the clay used for forming the molded body, and it is possible to efficiently produce a ceramic article having a uniform shape, size, and pattern.

In this embodiment, the first, second, seventh, ninth, tenth, and fifteenth aspects are described.
Corresponds to the embodiment of

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 9 by taking a case where a spot pattern is formed in a spiral pattern as an example.

FIG. 6 is an external view showing a tile according to a second embodiment of the present invention.

As shown in the figure, the tile 1 of the present embodiment
Is composed of spiral colored portions 5a and 5b.
a, yellow colored powdery granules 2 were mixed in spots on a white background,
As a whole, it is formed in a spot pattern with a pale yellow color tone, and the colored portion 5b is formed in black. For this reason, the tile 1 has an appearance in which the colored portion 5a of the speckled pattern forms a spiral pattern with the black colored portion 5b as the ground.
The colored portions 5a and 5b are continuous in the thickness direction, and the colored powder particles 2 are uniformly dispersed in the colored portions 5a as in the first embodiment. Therefore, even when the tile 1 is sliced on any surface parallel to the surface, the same appearance in which the same spotted colored portion 5a is always formed in a spiral pattern with the colored portion 5b as the ground appears.

The tile 1 was manufactured as follows.

FIG. 7 is a schematic view showing a state of forming a plate-like body.
Reference numeral 30 denotes a two-stage roll machine, and reference numeral 6 denotes a plate-like body formed from clay. FIG. 8 is an explanatory view of a state in which the laminated body of the plate-like body formed in FIG. 7 is wound, and 7 is the laminated body. FIG. 9 shows FIG.
FIG. 2 is a perspective view showing a state in which a rod-shaped substrate formed by winding in FIG. 1 is cut, and in the figure, the same reference numerals are used for the same or corresponding parts as in the first embodiment.

The tile 1 of the second embodiment is manufactured in the same manner as in the first embodiment, following the steps shown in FIG. First, in the kneaded clay forming step A, feldspar 50%, porcelain stone 20
%, Kaolin 10%, clay 20%, and 25 kg of a kneaded clay base material mixed powder and 25 kg of yellow colored powder
And 12.5 liters of water were put into a mixer and mixed, then put into a kneader and further kneaded sufficiently to obtain a water content in which yellow colored powder particles were uniformly dispersed in a white clay body. A kneaded material containing 20% of colored particles was formed. Here, the yellow colored powder 2
Is obtained by granulating a colored clay using loess as a coloring pigment, drying and firing the same as in the above-described colored powder / particle production example. Separately from the kneaded clay, 1 kg of chromite pigment and 12.5 g of water were added to 49 kg of the kneaded clay base material mixed powder.
The same operation was carried out for the case where l was added, and a plain black clay having a water content of 20% was produced.

Next, in the rod-shaped base material forming step B, the kneaded clay containing the colored powder and granules formed in the kneaded clay forming step A and the solid black kneaded clay are mixed with each other as shown in FIG. 30 to form a plate-like body 6 containing colored powdery granules.
a and a black plain plate-like body 6b were formed. Each of these plate-like bodies 6a and 6b has a thickness of 3 mm.

Next, as shown in FIG. 8, a plate-shaped body 6a made of a kneaded clay containing colored powder and granules is laminated on a plate-shaped body 6b made of a solid black clay, and a gap is formed between the layers. The whole was lightly pressed so as not to have any, and the laminate 7 was formed. And
The laminated body 7 was wound up in a roll shape around the lateral end portion to form a roll-shaped rod-shaped substrate 3 having a diameter of 40 mm.

At this time, the joint surfaces of the plate-like members 6a and 6b are formed with the purpose of preventing the occurrence of gaps at the boundary surface of the pattern and the occurrence of cracks during drying and firing.
An adhesive made of MC was applied. Here, as the adhesive, cellulose ether such as methylcellulose and ethylcellulose, a synthetic resin, and the like can be used.
Note that this adhesive may be previously mixed into the clay, instead of being applied later.

Steps after the molded body forming step C are the same as those of the first embodiment, and as shown in FIG.
Are sequentially cut into a 20 mm-width piece, and the roll-shaped mass 4
Was formed. A spiral pattern is formed on the cut surface of the roll-shaped massive piece 4 thus obtained. And
The rolled mass pieces 4 are arranged in a 170 mm square forming plate 21, which becomes a 150 mm square tile in a completed state, with the cut surface of the spiral pattern facing up, and 4 pieces per row are arranged in 4 rows, and a total of 16 pieces are arranged at 75 kg / cm. Press molding was performed at a pressure of ² to obtain a tile molded body (not shown) in which the massive pieces 4 were crushed and integrated with each other.

Then, in a drying and firing step D, the molded body of this tile is dried at 150 to 200 ° C.
It baked at 200 degreeC for 30 hours. As a result, as shown in FIG. 6, a colored portion 5a is formed from the plate-like body 6a containing the colored powder and the colored portion 5b is formed from the black plain plate-shaped body 6b. Tile 1 was obtained.

In the present embodiment, the black colored portion 5b is formed so as not to include the colored powder 2; It is also possible to appropriately have a spotted pattern. In addition, the coloring of each colored portion can be arbitrarily determined,
This can be done either by changing the color of the colored powder 2 or by changing the color of the clay body.

Further, in this embodiment, a spiral pattern is formed from two colored portions. However, a spiral pattern can be formed from three or more colored portions. In this case, the laminated body 7 is formed by laminating the planar bodies 6 of three or more colors. However, in consideration of workability at the time of winding, etc., each of the planar bodies 6 constituting the laminated body 7 is formed. Care must be taken, such as reducing the thickness. If the winding method of the laminate 7 is changed, a further changed spiral pattern can be obtained. For example, a pattern like a nori roll can be obtained by winding using a rod of a different color as a core material.

As described above, in the tile of this embodiment, similarly to the first embodiment, the colored clay is granulated, dried, and then baked with the colored powder 2 mixed with the clay having a predetermined moisture content. The rod-shaped substrate 3 is cut into a predetermined size, the cut lump 4 is formed into a tile shape, dried, and then fired. It is formed by laminating the body 6 and winding it. Therefore, in addition to the same effects as in the first embodiment, it is possible to obtain a variety of patterns in which a plurality of differently colored plate-like bodies 6 appear as spiral colored portions.

In the same manner as in the first embodiment, the method for manufacturing a tile according to the present embodiment comprises granulating a colored clay, drying it, and mixing the fired colored powder 2 with a predetermined moisture content. And a rod-shaped base material forming step B of forming a rod-shaped base material 3 from the kneaded clay, and cutting the rod-shaped base material 3 into predetermined dimensions, and cutting the cut massive piece 4 It comprises a molded body forming step C for forming a tile molded body by molding into a predetermined shape, and a drying and firing step D for drying and firing the molded body.
The rod-shaped base material forming step B includes forming a plate-shaped body 6 from the clay, stacking the formed plurality of different-colored plate-shaped bodies 6, and winding the plate-shaped body 6 into a rod shape. Therefore, the above-mentioned various tiles in which the spot pattern is formed in a spiral pattern can be easily manufactured by a simple process.

In this embodiment, claims 1 and 2
Claim 3, Claim 7, Claim 9, Claim 10, Claim 1
1 and an aspect of claim 15.

<Third Embodiment> A third embodiment of the present invention relates to a tile in which a spot pattern is formed in a striped pattern and a method for manufacturing the same. This third embodiment will be described with reference to FIGS.

FIG. 10 is an external view showing a tile according to a third embodiment of the present invention.

As shown in the figure, tile 1 of the present embodiment
The colored portions 5a and the colored portions 5b alternately change the direction to form a striped pattern. Here, the colored portion 5a is formed in a spotted pattern in which green colored powdery particles 2 are mixed on a white background, and the colored portion 5b is formed in black. The tile 1 has a spotted colored portion 5a. Has a striped pattern with the black colored portion 5b as the ground. As in the second embodiment, the colored portions 5a and 5b are continuous with the same cross-sectional area in the thickness direction of the tile. And the same pattern appears.

The tile 1 of the third embodiment was manufactured as follows.

FIG. 11 is a perspective view of the laminate 7 in this embodiment.

In the production of the tile of this embodiment, the plate-like body 6 is formed from the clay like the second embodiment described above.
The plurality of differently colored plate-like bodies 6 are laminated to form a laminate 7. As shown in FIG. 11, the laminated body 7 of the present embodiment includes a plate-shaped body 6a formed from a clay in which colored powdery particles are uniformly dispersed in a white clay body, and a black solid clay. Are formed by alternately laminating five layers, and the clay forming these plate bodies 6a and 6b has the same composition as that of the second embodiment. However, in the plate-shaped body 6a formed from the clay containing the colored powder, green colored powder is used instead of the yellow colored powder 2. And these plate-like bodies 6a, 6
The thickness of b is 8 mm, and thus the thickness of the laminate 7 is 40 mm.

The laminate 7 thus formed is then
A cut was made by making a cut with a piano wire in a width of 40 mm in the horizontal direction and vertically to form a prismatic rod-shaped base material 3. This rod-shaped substrate 3 has the same cross-sectional dimensions as in the first embodiment. Then, the rod-shaped substrate 3 was cut in a vertical direction at a width of 15 mm to form a block-shaped massive piece 4. This massive piece 4
Is 40 mm square and 15 mm thick. In addition, the two-dot chain line in FIG. 11 shows the cut of the laminated body 7 and the cutting of the block-shaped massive piece 4 of the unit. Then, four pieces of the cut mass pieces 4 were arranged on the press forming dish 21 with the cut surface facing upward, and thereafter, the tile 1 was manufactured by the same operation as in the second embodiment. A colored portion 5a is formed from the plate-like material 6a containing the colored powdery material, and a colored portion 5b is formed from the black plate-like material 6b. As shown in FIG. The tile 1 having a size of about 75 mm square was obtained in which the striped pattern was exposed on a black background.

The tile 1 of this embodiment and the method of manufacturing the same are as follows.
The second embodiment is the same as the second embodiment, except that the rod-shaped base material 3 is formed by cutting the laminate 7 of the plurality of plate members 6a and 6b of different colors. Therefore, in this embodiment, the same effects as in the second embodiment can be obtained except for the specific shape of the pattern to be formed. In the present embodiment, the number and thickness of the plate-like bodies 6 forming the laminate 7, the coloring and coloration of the clay forming the plate-like bodies 6, and the color and type of the colored powder and granular material 2 used And the like can be arbitrarily set as in the second embodiment.

The third embodiment has the following features.
Claim 4, Claim 7, Claim 9, Claim 10, Claim 1
2 and an aspect of claim 15.

<Fourth Embodiment> A fourth embodiment of the present invention relates to a tile in which a spot pattern is formed in a lattice pattern and a method for manufacturing the same. The fourth embodiment will be described with reference to FIGS.

FIG. 12 is an external view showing a tile according to the fourth embodiment.

As shown in the figure, tile 1 of the present embodiment
Is formed by alternately arranging substantially quadrangular colored portions 5a and 5b to form a lattice pattern, and the colored portions 5a and 5b may be colored in any manner. The colored portion 5a is formed in a spotted pattern in which green colored powders 2 are mixed in a spotted manner on a white background, and the colored portion 5b is formed in a plain black color. As in the second and third embodiments, these colored portions 5a and 5b are respectively continuous with the same cross-sectional area in the thickness direction.

The tile 1 of the fourth embodiment was manufactured as follows.

FIG. 13 is a perspective view of a rod-shaped substrate in this embodiment.

As shown in the figure, in the present embodiment, unlike the second and third embodiments, the rod-shaped base material 3 is formed by accumulating a plurality of different-colored rods 8a and 8b made of clay. Is done.

First, from the same kneaded material as in the second and third embodiments, a kneaded clay containing colored powdery particles in which green colored powdery particles 2 are uniformly dispersed in a white kneaded clay body, And a black clay. Then, these kneaded materials were extruded using an extruder using a round nozzle, and a plurality of rod-shaped bodies 8a containing colored powder particles and black rod-shaped bodies 8b were formed. The diameter of these rods 8a and 8b is 18 mm.

Then, after applying an adhesive to the surfaces of the rods 8a and 8b in the same manner as in the second and third embodiments, FIG.
As shown in Fig. 3, two each, a total of four,
The rod-shaped base material 3 joined integrally was formed.

The steps and operations up to obtaining a finished tile from the rod-shaped base material 3 thus formed are the same as those in the above-described embodiment. That is, the rods 8a, 8b accumulated in a bundle
The rod-shaped substrate 3 made of was cut into a circle to obtain a substantially block-shaped lump 4, and one lump 4 was placed in a forming dish 21 with its cross section facing upward and pressed. As a result, since the kneaded material is adjusted to have an appropriate water content, each of the initially round rods 8a and 8b is pushed and expanded in four directions and deformed into a substantially square shape, thereby obtaining a tile molded body. . Then, the molded body of this tile is dried at 200 ° C. and baked at 1200 ° C. for 30 hours. As shown in FIG. 12, a colored portion 5 a in which a spot pattern is formed by a green colored powder 2 and a black solid color The tiles 1 having a lattice pattern in which the portions 5b are alternately arranged are obtained.

In this embodiment, four rods 8 of two colors are used.
The rod-shaped base material 3 is formed by accumulating a and 8b. If a rod-shaped base material is formed by alternately accumulating a large number of rod-shaped bodies having smaller diameters, the rod-shaped base material 3 is similarly formed using such a rod-shaped base material 3. The manufactured tile may have a checkerboard pattern. In the present embodiment, the rods 8a and 8b have a round cross section, but may have a triangular cross section, for example. In this case, if a bar-shaped base material is formed by accumulating the different-colored bar-shaped bodies having the triangular cross-section with their sides aligned,
From such a rod-shaped substrate, more different lattice-shaped pattern tiles can be obtained. In addition, other modifications are possible, and furthermore, the number and diameter of the rods 8 constituting the rod-shaped base material,
Further, it is the same as in the above-described embodiment that the coloring and the color arrangement can be arbitrarily set.

As described above, in this embodiment, the rod-shaped substrate 3 is
It is formed by accumulating a plurality of differently colored rods 8a and 8b made of kneaded clay, and the same effects as those of the second and third embodiments can be obtained except that the obtained patterns are specifically different. it can.

In the fourth embodiment, claims 1, 2, 5, 5, 7, 9, 10,
This corresponds to the aspects of claims 13 and 15.

<Fifth Embodiment> A fifth embodiment of the present invention relates to a tile in which spots are formed in a flowing pattern and a method for manufacturing the same. The fifth embodiment will be described with reference to FIGS.

FIG. 14 is an external view showing a tile according to a fifth embodiment of the present invention.

As shown in the figure, this tile 1 has 3
The colored portions 5a, 5b, and 5c are formed in a flowing pattern. The colored portion 5a has a plain white color, and the colored portion 5b has a spotted pattern in which green colored particles 2 are mixed on a white background. The colored portions 5c are each formed in a spotted pattern in which pink colored powders 2 are mixed on a white background. Note that these colored portions 5a, 5b, 5c are different from the above-described embodiment,
It is not identical and continuous with the surface in the thickness direction perpendicular to the surface. That is, a different pattern appears for each arbitrary cross section parallel to the tile surface.

The tile 1 according to the fifth embodiment of the present invention corresponds to a modification of the fourth embodiment, and the rod-shaped base material formed by accumulating a plurality of different-colored rods in the fourth embodiment is further modified. It is manufactured using a rod-shaped substrate twisted or twisted in the length direction.

FIG. 15 is an external view showing a rod-shaped substrate in this embodiment.

As shown in the figure, the rod-shaped base material 3 in this embodiment has three different-colored rods 8a, 8b, 8c formed by the same method as in the fourth embodiment, and is further integrated. It is formed by twisting or twisting the tongue. here,
In the present embodiment, twisting or twisting is performed by gripping the outer periphery of three integrated rods 8a, 8b, and 8c, and twisting the rods. Twist can also be added by twisting the bodies.
Since the rod-shaped base material or the rod-shaped body is made of clay having a predetermined moisture content, such twisting or twisting can be easily applied.

In this embodiment, each of the rods 8a, 8b,
The clay for forming 8c is the same as that of the above-described embodiment, but in order to increase the deformation at the time of pressing, the water content thereof is particularly set at 3%.
It has been adjusted to around 5%. The kneaded clay forming the rod-shaped body 8a is made of a plain white kneaded clay, and zinc white is particularly mixed therein to increase the whiteness. Also, the rods 8b,
In the kneaded clay forming 8c, a green colored powder 2 and a pink colored powder 2 are mixed in a white clay. The pink colored particles 2 are produced from a clay colored with a manganese-alumina-based pink pigment (Potato Triumph) in the same manner as in the above-described colored particle production example. It should be noted that the kneaded material forming the rods 8a, 8b, 8c is added with an adhesive made of CMC.

Then, the rod-shaped substrate 3 thus formed
Then, as in the fourth embodiment, the block was cut into a block-shaped block 4 and one block 4 was placed in a forming dish 21 with the cut surface facing upward and pressed. Then, the obtained molded body of the tile was dried and fired. Here, since the rod-shaped substrate 3 of this embodiment is particularly strongly twisted, each of the rods 8a, 8b, 8c is deformed from the initial round shape to a strong shape. Is applied, and the obtained tile 1 has the rod-like bodies 8a, 8b, 8c
The colored portions 5a, 5b, and 5c formed respectively form the deformed flow pattern as shown in FIG.

As described above, in this embodiment, the rod-shaped base material 3 in which the plurality of different-colored rod-shaped bodies 8a, 8b, 8c are integrated is further twisted or twisted, and the spot pattern is further changed. A tile formed in a pattern can be obtained.
Such twisting or twisting can also be applied to the bar-shaped base material in the third embodiment formed by laminating a plurality of plate members of different colors and cutting the plate members.

In this embodiment, claims 1 and 2
It corresponds to the aspects of claims 5 to 7, claim 9, claim 10, and claims 13 to 15.

The pattern similar to that of the present embodiment is obtained by forming a plurality of different-colored blocks from a clay having an appropriate moisture content and kneading these blocks to a mottled pattern. It can also be obtained by using.

<Sixth Embodiment> A sixth embodiment of the present invention relates to a tile in which a spot pattern is formed in a mottled pattern like a mosquito coil and a method for manufacturing the same. The sixth embodiment will be described with reference to FIGS.

FIG. 16 is an external view showing a tile according to a sixth embodiment of the present invention.

This tile 1 has 3 tiles as shown in the figure.
A mottle pattern is formed in a mosquito coil shape by the colored portions 5a, 5b, 5c. Here, although not shown, the colored portions 5a, 5b and 5c are all placed on a white background.
The spotted pattern is formed by mixing the pink colored powder, the brown colored powder, and the green colored powder. Note that these colored portions 5a, 5b, 5c are discontinuous in the thickness direction.
A different pattern appears for each arbitrary cross section parallel to the tile surface.

The production of the tile 1 according to this embodiment will be described.

FIG. 17 is an external view showing a rod-shaped substrate used in the present embodiment. FIG. 18 shows a lump obtained by cutting the rod-shaped substrate of FIG. 17 into a predetermined length in a molding dish of a press machine. It is an external view which shows the state which arrange | positioned.

As shown in these figures, the present embodiment is different from the fifth embodiment in that a plurality of different-colored rods are integrated as a rod-shaped base material, and a material obtained by twisting or twisting in the longitudinal direction is used. Same as Example, except that relatively thin rope-shaped and two types of rod-shaped substrates 3a, 3b are used, and that these rod-shaped substrates 3a, 3b are cut relatively long, and this cut is performed. The present embodiment is different from the previous embodiments in that the piece-shaped lump pieces 4a and 4b of the rope are arranged laterally in the forming dish 21. Specifically, the rod-shaped substrate 3a is made of a relatively thin rod-shaped body 8a.
And 8b, and the rod-shaped substrate 3b
Is obtained by twisting the rod-shaped body 8a and the same rod-shaped body 8c. These rod-shaped bodies 8a, 8b, 8c are made of clay formed by mixing pink, brown, and green colored powders 2 into a white clay body. In addition, the brown colored powder 2 is manufactured from the clay which uses bengara (iron oxide) as a pigment in the same manner as in the above-described colored powder manufacturing example. Then, these rope-shaped rod-shaped base materials 3a, 3b are cut into a predetermined length, and the cut rope-shaped mass pieces 4a, 4a are cut.
As shown in FIG. 18, b was spirally wound around the forming dish 21 twice, arranged closely, and housed.
The space formed in the corner of the forming dish 21 was filled with a piece of the rod 8a.

In this way, the mass pieces 4a and 4b are
After being placed inside and stored, it was pressed in the same manner as in the previous examples. By this press, the rope-shaped lump 4
The peaks of the ropes a and 4b were pushed out on both sides to form a planar boundary with the adjacent peaks of different colors, resulting in a long flow pattern. Then, the obtained molded body of the tile is dried and fired to form the tile 1 shown in FIG. 16 in which the colored portions 5a, 5b, 5c are formed from the rod-shaped bodies 8a, 8b, 8c, respectively. Was.

In this embodiment, the mass pieces 4a and 4b are arranged in a spiral shape or a mosquito coil in the molding dish 21. However, if they are arranged in a straight line in the same direction, for example. , A striped mottle pattern can be obtained.

As described above, in the present embodiment, a plurality of types of twisted rod-like base materials 3a, 3b are formed from a plurality of different-color rod-like bodies 8a, 8b, 8c.
The pieces 4a and 4b obtained by cutting the pieces a and 3b relatively long are horizontally arranged in a mold and press-molded, so that a long mottled pattern can be obtained.

This embodiment corresponds to a modification of the above-described fifth embodiment, and corresponds to the same aspect of the fifth embodiment.

<Seventh Embodiment> Next, a seventh embodiment in which the present invention is embodied in an artificial cobblestone having a speckled pattern and a method of manufacturing the same will be described with reference to FIGS.

FIG. 19 is an external view showing an artificial cobblestone according to a seventh embodiment of the present invention.

As shown in the figure, the artificial cobblestone 9 of this embodiment is in the form of a spindle-shaped pebble, and is used by laying it on an entrance, a passage, a garden, a pond, a floor of a bathroom, a graveyard, or the like. You. The artificial cobblestone 9 has an appearance of a speckled pattern in which the colored powder 2 is mixed on a white background. The color of the colored powder 2 is arbitrary, but in this example, it is green to make it look like granite. The colored particles 2 are uniformly dispersed and mixed in the entire artificial cobblestone 9. Therefore, even if the artificial cobblestone 9 is worn or chipped, a spot pattern always appears on its surface.

The production of the artificial cobblestone 9 will be described.

FIG. 20 is a schematic diagram of an artificial cobblestone making machine used in the production of the artificial cobblestone of this embodiment, 40 is an artificial cobblestone making machine, 41 is a feeder, 42 is a stone maker,
43 is a press-extrusion part, 43a is a half mold, 44 is a rotary blade,
45 is a cylindrical rotating body, 46 is a molded body, 47 is a collection belt, and 48 is a storage box.

The artificial cobblestone 9 is manufactured in the same manner as in each of the above-described embodiments according to the process shown in FIG. 2, and in the clay-forming step A and the rod-shaped base material forming step B, Similarly, the continuous manufacturing machine 10 shown in FIG. 3 was used. First, in the kneaded clay forming step A, 25 kg of the kneaded clay base material mixed powder composed of 50% feldspar, 20% porcelain stone, and 30% kaolin, 25 kg of green colored powder, 12.5 L of water and 1 kg of CMC were added and mixed, and further kneaded with a kneader 12 to obtain a water content of about 20%.
%, A kneaded clay in which green colored powder particles were uniformly dispersed was formed in a white kneaded clay body. Here, the green colored powder used was the one manufactured in the above-described powder manufacturing example.
Next, in the rod-shaped base material forming step B, the kneaded material formed by the kneader 12 was sent to an extruder 13 provided at a lower portion thereof, and was continuously extruded from a die 14 having a diameter of 30 mm. Thereby, the rod-shaped base material 3 made of the clay containing the colored powdery granules was formed.

[0099] In the molded body forming step C, the rod-shaped base material 3 formed in the rod-shaped base material forming step B is continuously fed from the supply port provided at the top of the feeder 41 using the artificial cobblestone manufacturing machine 40. Then, the rod-shaped base material 3 was extruded and supplied to the stone crusher 42. In the stone crusher 42, first, in the pressure extrusion section 43,
The rod-shaped substrate 3 was continuously struck from the left and right by a pair of left and right elliptical half molds 43a and deformed under pressure to form a substantially elliptical cross section. Subsequently, at the cutting portion, the rod-shaped substrate 3 is cut into a fixed length of 20 mm at the contact portions of the pair of left and right rotating blades 44 facing each other,
A cut piece 4 was formed. Simultaneously with this cutting, the massive piece 4 was shaped into a roughly spherical shape at the upper and lower curved portions of the rotary blade 44. After cutting, the block 4
Since sticking may occur, lubricating oil obtained by dissolving 3 g of paraffin in 1 liter of rapeseed oil was applied to the rod-shaped substrate 3 immediately before cutting by a coating means such as a brush, a brush, a spray, or the like. And the massive piece 4 cut to a certain size is
A spindle-shaped molded body 46 having a length of 25 to 30 mm is dropped into the inside of the cylindrical rotary body 45 constituting the forming part from the opening of the upper lid, and is formed so as to be rounded while the cylindrical rotary body 45 rotates. Was formed. The spindle-shaped formed bodies 46 were generated at a rate of 20 pieces per minute, dropped on a collection belt 47 disposed below the cylindrical rotary body 44, and stored in a storage box 48.

Thereafter, in the drying and firing step D, the spindle-shaped molded bodies 46 formed in the molded body forming step C are put into five 20 cm-square fired sheaths and dried in advance in a drying chamber at a maximum of 200 ° C. for 12 hours. After that, the mixture was kept at 1200 ° C. for 4 hours in a gas shuttle furnace and gradually cooled to obtain an artificial cobblestone 9.

The artificial cobblestone 9 thus obtained has a spindle shape with an average weight of 24 g, an average length of 25 mm, and an average height of 17 mm. As shown in FIG. It is a pebble having a speckled pattern in which the powders 2 are mixed.

The artificial cobblestone 9 thus obtained was used.
It is also effective to appropriately polish using a means such as a tron mill. Thereby, gloss can be given to the surface of the artificial cobblestone 9 and an excellent aesthetic appearance can be obtained.

Further, in the present embodiment, the artificial cobblestone 9 is spherical, but it is not necessary that the artificial cobblestone 9 has a spherical shape, has no unnatural corners, and is rounded to such an extent that the appearance of the cobblestone is not impaired. Is enough. Also, regarding the overall shape,
In this embodiment, the shape is spindle-shaped, but the shape can be arbitrarily determined according to the specific mode of use of the artificial cobblestone, such as a sphere, an egg, or a flat shape thereof. Furthermore, the size and size of the artificial cobblestone, the coloration of the colored powder and granules to be used and the clay body, and the like can be arbitrarily set.

As described above, the artificial cobblestone 9 of this embodiment is
Is a method of granulating a colored kneaded clay, drying it, and sintering it.
The rod-shaped base material 3 made of kneaded clay having a predetermined moisture content into which is mixed is cut into a predetermined size, the cut massive piece 4 is shaped into a cobblestone, dried, and fired.

Therefore, according to the present embodiment, since the colored powdery granules 2 are baked in advance, they do not dissolve or exude into the kneaded clay and form clear spots. And since the colored powdery granules 3 are uniformly dispersed and mixed in the kneaded clay, even with long-term strength wear,
Its initial clear spots are retained and do not fade or disappear. In addition, since no glaze is used on the surface of the artificial cobblestone, the surface is rough, and even when used on a bathroom floor or the like, it is less slippery and safe.

Further, in this embodiment, the rod-shaped base material 3 is formed in advance from the kneaded clay into which the colored powdery granules 2 are mixed.
Is cut to form a cobblestone molded body from the cut massive piece 4, so that the rod-shaped base material 3 can be easily cut to a predetermined size, and the massive piece 4 is It can be easily formed into a shape, and an artificial cobblestone having a uniform shape, size, and pattern can be obtained.

The method for producing an artificial cobblestone according to the present embodiment is characterized in that the colored clay is granulated, dried and fired.
Forming step A for forming a kneaded clay having a predetermined moisture content mixed with
And a rod-shaped substrate forming step B of forming the rod-shaped substrate 3 from the kneaded material, cutting the rod-shaped substrate 3 into a predetermined size, and forming the cut massive piece 4 into a cobblestone shape. The method comprises a molded body forming step C for forming a molded body of cobblestone, and a drying and firing step D for drying and firing the molded body.

Therefore, according to this embodiment, the kneaded clay forming step A, the rod-shaped base material forming step B, and the compact forming step C
And a simple process including the drying and firing step D, the artificial cobblestone can be easily manufactured, and mass production can be performed. In particular, the provision of the rod-shaped base material forming step B facilitates the management of the kneaded clay used for forming the molded body, and efficiently produces an artificial cobblestone having a uniform shape, size, and pattern. it can.

In this embodiment, claims 1 and 2
It corresponds to the aspect of claim 8, claim 9, claim 10, and claim 16.

<Eighth Embodiment> By the way, the artificial cobblestone 9 as in the seventh embodiment has a variety of spotted patterns formed in a pattern as shown in FIGS. 21 (a) and 21 (b). (Eighth embodiment). This example is similar to that already described in the embodiment relating to the tile, and will be briefly described below.

The artificial cobblestone 9 in FIG. 21 (a) is placed on a white background.
The pattern is a pattern with a black curve drawn, and green colored powders 2 are mixed in spots on a white background. This is manufactured in the same manner as in the third embodiment, except that the rod-shaped substrate forming step B
, A white plate-like body 6a mixed with a green colored powder 2 and a black plate-like body 6 colored with a chromite pigment.
b) is laminated after applying an adhesive, and cut to form a rod-shaped base material 3, which is supplied to an artificial cobblestone manufacturing machine 40 to form a spindle-shaped molded product. This case corresponds to the aspects of claim 1, claim 2, claim 4, claim 8, claim 9, claim 10, claim 12, and claim 16.

FIG. 21 (b) shows a pattern in which a white background and a portion colored in reddish pink are formed in a band-like pattern, and green colored powder particles 2 are spotted on the white background. It is scattered. In the same manner as in the fifth and sixth embodiments, in the rod-shaped base material forming step B, a white background rod 8a mixed with the green colored powder 2 and a manganese-alumina-based pink pigment 8) brown rods colored with)
b and twisting these to form the bar-shaped base material 3, and then supplying it to the artificial cobblestone manufacturing machine 40 to form a spindle-shaped molded product. This case corresponds to the aspects of claim 1, claim 2, claim 5, claim 6, claim 8, claim 9, claim 10, claim 13, claim 14, and claim 16.

As mentioned above, the ceramic articles of the present invention and the method for producing the same have been mainly described by taking tiles and artificial cobblestones as examples. However, the present invention is not limited to these. The present invention can be applied to various ceramic articles such as furnishings, ornaments in gardens and the like, and molded articles such as tombstones and lanterns.

The apparatus used in the present invention is not limited to the apparatus described in each of the above embodiments, and various apparatuses already used in the ceramic industry or the like may be appropriately selected and used. .

[0115]

As described above, in the ceramic article of the present invention, the colored clay is granulated, dried and then formed into a predetermined shape with a predetermined moisture content by mixing the fired colored powder. , Dried and fired. Therefore, according to the ceramics article of the present invention, the appearance of a speckled pattern in which the colored powdery granules appear as speckles can be obtained. Since the colored powder is fired, it does not dissolve or exude into the kneaded material and forms clear spots. In addition, the colored powder particles are mixed during the formation of the kneaded clay and are uniformly dispersed, so that the spot pattern is weakened by long-term strength wear,
Also, it does not disappear. In addition, since no glaze is used on the surface, even if it gets wet with water, it does not slip easily and is safe.

Further, the method for manufacturing a ceramic article of the present invention comprises a step of forming a kneaded clay having a predetermined moisture content by mixing a dried and fired colored powder after granulating the colored kneaded clay; And a forming step of forming the formed body to form a formed body having a predetermined shape, and a drying and firing step of drying and firing the formed formed body. Therefore, the above-mentioned ceramic article can be easily manufactured by a simple process including the kneaded clay forming process, the compact forming process, and the drying and firing process.

In addition to the above effects, according to the second aspect of the ceramic article of the present invention, the rod-shaped substrate made of the clay having a predetermined moisture content is cut into a predetermined size, and the cut lump is formed. Since the piece is formed into a predetermined shape, the rod-shaped substrate can be easily cut into a predetermined size, and a ceramic article having a uniform shape, size, and pattern can be obtained. Furthermore, the same applies to claims 3 to
According to the sixth aspect, it is possible to obtain various appearances in which the spot pattern is formed in various patterns of various colors. According to the tenth to fourteenth aspects of the method for producing a ceramic article of the present invention, the corresponding ceramic article can be easily produced by a simple process.

[Brief description of the drawings]

FIG. 1 is an external view showing a tile according to a first embodiment of the present invention.

FIG. 2 is a process diagram illustrating a tile manufacturing process according to a first embodiment of the present invention.

FIG. 3 is a schematic view of a continuous manufacturing machine used in the first embodiment of the present invention.

FIG. 4 is a perspective view showing a rod-shaped substrate formed by the continuous manufacturing machine of FIG.

FIG. 5 is a schematic view of a press used in the first embodiment of the present invention.

FIG. 6 is a perspective view showing a part of a configuration of a tile according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram in a use state of a two-stage roll machine used in a second embodiment of the present invention.

FIG. 8 is an explanatory view showing a state where a plate-like body formed by the two-stage roll machine of FIG. 7 is laminated and then wound up.

FIG. 9 is a perspective view showing a state in which a rod-shaped substrate formed by winding as shown in FIG. 8 is cut.

FIG. 10 is an external view showing a tile according to a third embodiment of the present invention.

FIG. 11 is a perspective view showing a laminate formed in a third embodiment of the present invention.

FIG. 12 is an external view showing a tile according to a fourth embodiment of the present invention.

FIG. 13 is a perspective view showing a rod-like base material formed by stacking rod-like bodies in a fourth embodiment of the present invention.

FIG. 14 is an external view showing a tile according to a fifth embodiment of the present invention.

FIG. 15 is a side view showing a state in which a rod-shaped base material formed by stacking rod-shaped bodies in the fifth embodiment of the present invention is twisted in the circumferential direction.

FIG. 16 is an external view showing a tile according to a sixth embodiment of the present invention.

FIG. 17 is a side view showing a rope-shaped lump formed in the sixth embodiment of the present invention.

FIG. 18 is an explanatory view showing a state in which a rope-shaped lump is wound and disposed in a forming plate of a press machine in a sixth embodiment of the present invention.

FIG. 19 is an external view showing an artificial cobblestone according to a seventh embodiment of the present invention.

FIG. 20 is a schematic view of an artificial cobblestone making machine used in a seventh embodiment of the present invention.

FIG. 21 is an external view showing another embodiment of an artificial cobblestone according to an eighth embodiment of the present invention.

FIG. 22 is a schematic view showing an example of a colored powdery granule manufacturing apparatus used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tile 2 Colored granular material 3 Rod-shaped base material 4 Lumped piece 6 Plate-shaped body 7 Laminate 9 Artificial cobblestone A Clay forming step B Rod-shaped base material forming step C Molding body forming step D Drying and firing step

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) C04B 33/00-33/36 B28B 3/00-3/26

Claims (16)

(57) [Claims] Claims 1. A colored clay is granulated, dried and then molded into a prescribed shape with a predetermined moisture content mixed with a calcined colored powder, dried and calcined. Ceramic products. 2. A colored kneaded clay is granulated and dried, and then a rod-shaped substrate made of a kneaded clay having a predetermined moisture content mixed with a baked colored powder is cut into a predetermined size. A ceramic product characterized by being formed into a predetermined shape, dried and fired. 3. The ceramic article according to claim 2, wherein the rod-shaped substrate is formed by laminating a plurality of plate members of different colors and winding the plate members. 4. The ceramic article according to claim 2, wherein the rod-shaped substrate is formed by laminating a plurality of plate members of different colors and cutting the same. 5. The rod-shaped substrate is formed by accumulating a plurality of rods of different colors.
Ceramic products described in. 6. The rod-shaped substrate is further twisted or twisted.
Ceramic products described in. 7. The ceramic article according to claim 1, wherein the ceramic article is a tile. 8. The ceramic article according to claim 1, wherein the ceramic article is an artificial cobblestone. 9. A kneaded clay forming step of forming a kneaded clay having a predetermined moisture content into which a colored kneaded clay is granulated, dried and mixed with a baked colored powder and granules; A method for producing a ceramic product, comprising: a molded body forming step of forming a molded body; and a drying and firing step of drying and firing the molded body. 10. A kneaded clay forming step of forming a kneaded clay having a predetermined moisture content into which a colored kneaded clay is granulated, dried, and mixed with a baked colored powder, and forming a rod-shaped base material from the kneaded clay. A rod-shaped base material forming step; cutting the rod-shaped base material to a predetermined size; forming a cut lump piece to form a molded body having a predetermined shape; and drying the molded body. And a drying and firing step of firing. 11. The rod-shaped base material forming step includes forming a plate-shaped body from the clay, stacking the formed plurality of different-colored plate-shaped bodies, and winding the formed plate into a rod shape. The method for producing a ceramic article according to claim 10, wherein: 12. The rod-shaped base material forming step includes forming a plate-shaped body from the clay, stacking the formed plurality of different-colored plate-shaped bodies, and cutting the formed plate into a rod shape. The method for producing a ceramic article according to claim 10, wherein: 13. The method according to claim 10, wherein the rod-shaped base material forming step includes forming a rod-shaped body from the kneaded clay, and stacking the formed plurality of different-colored rod-shaped bodies in a rod shape. The method for producing the ceramic article described. 14. The method for producing a ceramic article according to claim 12, wherein the rod-shaped substrate is further twisted or twisted. 15. The method for manufacturing a ceramic article according to claim 9, wherein the ceramic article manufactured by the method for manufacturing a ceramic article is a tile. 16. The method for manufacturing a ceramic article according to claim 9, wherein the ceramic article manufactured by the method for manufacturing a ceramic article is a cobblestone.