EP0400704A2 - Method for forming uniformly compacted ceramic tiles and means for its implementation - Google Patents
Method for forming uniformly compacted ceramic tiles and means for its implementation Download PDFInfo
- Publication number
- EP0400704A2 EP0400704A2 EP90201228A EP90201228A EP0400704A2 EP 0400704 A2 EP0400704 A2 EP 0400704A2 EP 90201228 A EP90201228 A EP 90201228A EP 90201228 A EP90201228 A EP 90201228A EP 0400704 A2 EP0400704 A2 EP 0400704A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- punch
- tile
- forming
- inserts
- recesses
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/024—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form the pressure on the material being transmitted through flexible or resilient wall parts, e.g. flexible cushions on the ramming surface, resilient wall parts pressing as a result of deformation caused by ram pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0064—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces
Definitions
- This invention relates to a method for uniformly compacting ceramic tiles in general, and the means for its implementation.
- ceramic tiles are formed by suitable forming moulds, after which they are fired using methods or systems which it would be superfluous to describe herein.
- the regularity of the tile edges after firing is greater the greater the uniformity of the compaction to which the tiles have been subjected during their formation.
- the edges of the fired tile are regular, whereas in the second case they are irregular.
- Such non-homogeneous pressing can be due for example to a non-uniform particle size of the clay fed into the forming cavity in the mould, to different densities within the layer of clay fed into the mould, to a non-uniform thickness of said layer, and to relative settling or displacement of the parts which define the forming cavity.
- the main object of the present invention is to provide a method and the means for its implementation, by which perfectly compacted tiles can be formed, to thus comprise regular edges after firing.
- the method according to the invention comprises forming a ceramic test tile; measuring the compactness or hardness of the test tile at a plurality of points on one face of the tile; locally varying, in the sense of increasing or reducing, the thickness of the punch for forming the reverse face of the tile in those regions of the punch corresponding to those tile hardness values which most differ from the mean value of the largest number of measurements of approximately equal value; repeating said three operations until a substantially uniformly compacted tile is obtained; and continuously forming other tiles until the pressing conditions change.
- the means proposed for implementing the method of the invention consist of a punch and a forming mould provided therewith, and in particular a punch for applying the trademark, ie for forming the reverse face of the ceramic tile.
- the punch according to the invention is provided on its working surface with a plurality of small recesses of preferably identical shape, such as rectangular, with which a plurality of interchangeable inserts having different characteristics or properties are associated.
- Said inserts are arranged to be inserted practically as an exact fit into said recesses, said inserts being preferably of the same material as the working surface of the punch.
- This surface can be of metal, but in a preferred embodiment of the invention is of rubber.
- the interchangeable inserts can have different thicknesses and possess the same elastic characteristics as the working surface of the punch, or can have the same thickness and be produced from elastomers having elastic properties which differ from those of the working surface of the punch.
- said recesses are preferably provided over the entire working surface of the punch, and are preferably regularly distributed thereon.
- FIGSaid figures, and in particular Figure 1 show a reverse face punch 1, ie for forming the reverse or laying face of the tiles, and with which a ceramic mould of any known type is to be associated in known manner.
- the punch 1 can be fixed in any known manner, for example mechanically or magnetically, and be arranged at the top or the bottom of the corresponding forming cavity. This is well known to the expert of the art.
- the working surface of the punch 1 can be of metal or be of rubber or another equivalent elastomer.
- the punch 1 comprises a metal connection base 2 provided upperly with a cavity in which a rubber layer 3 is fixed in any known manner.
- the punch 1 is of rectangular shape, and more specifically square, but there is nothing to prevent the characterising elements according to the invention being used for any other format, whether of large or small dimensions, or with special shapes, including those comprising curved or arched edges.
- grooves 4 defining a plurality of raised portions or projections indicated by 5.
- some of the projections 5 are provided concentrically with respective square recesses 6 with radiused corners, and identical with each other in both shape and depth.
- millimetre dimensions can be used: - groove depth 0.4-0.6 - grove width 2-5 - projection size 28-36 - recess size 22-30 - recess depth 3.
- the recesses 6 can be provided over the entire working surface of the punch, or more precisely in all the recesses 5.
- recesses 6 are typically suitable for reverse face punches intended to cooperate with obverse face punches (ie those for forming the exposed face of the tile) with flat working faces.
- recesses 6 are provided preferably over the entire working surface of the reverse face punch 1 if this is to cooperate with an obverse face punch with its working surface relief-patterned, for example embossed.
- each recess 6 has available a set of identically shaped inserts 7 which differ in thickness by 0.1-0.2 mm from each other.
- recesses 6 of different depths can be obtained, and be suitably distributed, for example in rows parallel to the sides of the punch 1.
- the inserts 7 are of rubber construction, however if the surface of the punch 1 is of metal the inserts will also be of metal.
- Tile different-thickness rubber inserts are of the same material as the layer 3 and, according to an alternative embodiment, the inserts associated with each individual recess 6 can all have substantially the same thickness, but have different elastic characteristics.
- impressions of another shape or type can be provided between the recesses 6, which other impressions could for example be the usual cavities for forming the characteristic feet of ceramic tiles.
- Standard inserts 7 are those inserts having a thickness equal to the depth of the recesses 6. This is well illustrated to the right of Figure 2A.
- the mould forming cavity (or cavities) is filled with clay in the usual manner, and then pressed to obtain the test tile indicated by 11 in Figure 3A, and which will probably not be uniformly compacted for the reasons given heretofore.
- the reference numerals 44, 55, 77 indicate those parts or regions of the tile 11 which have been shaped or formed by the corresponding parts 4, 5 and 7 of the punch 1.
- the tile formed in this manner is placed on a test bench, where the tile hardness or compactness is measured with a suitable instrument such as a penetrometer or durometer. These measurements are preferably made in all the regions 55 and 77 of the tile.
- the thickness of the punch 1, or rather the pattern of its working face, is then modified locally on the basis of these readings or measurements.
- inserts of greater thickness are placed in those recesses 6 corresponding to tile regions of lesser hardnesses, and inserts of lesser thickness are placed in those recesses 6 corresponding to greater hardnesses.
- the punch is further modified one or more times in the aforesaid manner until a uniformly compacted tile is obtained.
- the forming press need be halted only for the time required to change the inserts 7 when changing from one type of production to another.
- the reference numerals 700, 710, 720,... indicate the regions of the tile 111 which have been compacted by said inserts 70, 71, 72.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
Description
- This invention relates to a method for uniformly compacting ceramic tiles in general, and the means for its implementation.
- In the known art, ceramic tiles are formed by suitable forming moulds, after which they are fired using methods or systems which it would be superfluous to describe herein.
- The regularity of the tile edges after firing is greater the greater the uniformity of the compaction to which the tiles have been subjected during their formation.
- In other words, if the tile has been uniformly compacted it undergoes homogeneous shrinkage during firing, whereas if the same tile has been non-homogeneously compacted it undergoes differential shrinkage during firing.
- In the first case the edges of the fired tile are regular, whereas in the second case they are irregular.
- For example, in the case of a straight-edge tile compacted non-homogeneously, as usually happens in the known art, its edges are no longer straight after firing, or mutually perpendicular.
- When such pieces are fitted together or installed, their overall appearance is relatively poor, particularly in the case of large formats.
- This also applies to tiles of special format, such as those having curved edges or straight edges inclined to each other at angles other than a right angle.
- In spite of the various attempts made up to the present time, means are still not available for compacting tiles in a substantially uniform manner.
- This is because the compaction of the clay does not only depend on the manner in which the clay is pressed or on the means used for this, but also depends on other factors which are difficult to simultaneously overcome in order to make the tile pressing homogeneous.
- Such non-homogeneous pressing can be due for example to a non-uniform particle size of the clay fed into the forming cavity in the mould, to different densities within the layer of clay fed into the mould, to a non-uniform thickness of said layer, and to relative settling or displacement of the parts which define the forming cavity.
- Again, the feeding of the clay can vary with variation in the production rate of the corresponding ceramic press, and these factors, which are difficult to control or quantify, have hindered all attempts at producing a virtually uniformly compacted tile.é
- The main object of the present invention is to provide a method and the means for its implementation, by which perfectly compacted tiles can be formed, to thus comprise regular edges after firing.
- The method according to the invention comprises forming a ceramic test tile; measuring the compactness or hardness of the test tile at a plurality of points on one face of the tile; locally varying, in the sense of increasing or reducing, the thickness of the punch for forming the reverse face of the tile in those regions of the punch corresponding to those tile hardness values which most differ from the mean value of the largest number of measurements of approximately equal value; repeating said three operations until a substantially uniformly compacted tile is obtained; and continuously forming other tiles until the pressing conditions change.
- The means proposed for implementing the method of the invention consist of a punch and a forming mould provided therewith, and in particular a punch for applying the trademark, ie for forming the reverse face of the ceramic tile.
- The punch according to the invention is provided on its working surface with a plurality of small recesses of preferably identical shape, such as rectangular, with which a plurality of interchangeable inserts having different characteristics or properties are associated.
- Said inserts are arranged to be inserted practically as an exact fit into said recesses, said inserts being preferably of the same material as the working surface of the punch. This surface can be of metal, but in a preferred embodiment of the invention is of rubber.
- If said working surface is of rubber, the interchangeable inserts can have different thicknesses and possess the same elastic characteristics as the working surface of the punch, or can have the same thickness and be produced from elastomers having elastic properties which differ from those of the working surface of the punch.
- Again, said recesses are preferably provided over the entire working surface of the punch, and are preferably regularly distributed thereon.
- The characteristics and merits of the invention will be better understood from the description given hereinafter with reference to the accompanying exemplifying figures, which illustrate a preferred embodiment of a punch for implementing the method according to the invention.
- Figure 1 is a perspective view of a punch according to the invention, with all the recesses shown free or empty for clarity.
- Figure 2A shows part of the section on the line II-II of Figure 1 to an enlarged scale, with a standard insert, ie one having a thickness equal to the recess depth, inserted into one of the recesses.
- Figure 2B is a view similar to the preceding, showing the same punch modified in order to uniformly compact the ceramic tiles.
- Figure 3A is an enlarged section through that tile part produced by the punch part shown in Figure 2A when standard inserts are inserted into the recesses.
- Figure 3B is a section similar to that of Figure 3A, but showing the same tile part when uniformly compacted by the modified punch part shown in Figure 2B.
- Said figures, and in particular Figure 1, show a
reverse face punch 1, ie for forming the reverse or laying face of the tiles, and with which a ceramic mould of any known type is to be associated in known manner. - The
punch 1 can be fixed in any known manner, for example mechanically or magnetically, and be arranged at the top or the bottom of the corresponding forming cavity. This is well known to the expert of the art. - The working surface of the
punch 1 can be of metal or be of rubber or another equivalent elastomer. - In the illustrated example (see Figures 2A, 2B) the
punch 1 comprises a metal connection base 2 provided upperly with a cavity in which arubber layer 3 is fixed in any known manner. - In the illustrated case the
punch 1 is of rectangular shape, and more specifically square, but there is nothing to prevent the characterising elements according to the invention being used for any other format, whether of large or small dimensions, or with special shapes, including those comprising curved or arched edges. - As can be seen in Figure 1, on the
rubber layer 3 there is provided a regular grid of smallidentical grooves 4, which in the illustrated case are arranged parallel to the pairs of opposing sides of thepunch 1. - The purpose of said
grooves 4 will be apparent hereinafter, they defining a plurality of raised portions or projections indicated by 5. As can be seen from Figure 1, some of theprojections 5 are provided concentrically with respectivesquare recesses 6 with radiused corners, and identical with each other in both shape and depth. - The dimensions of said
grooves 4,projections 5 andrecesses 6 are not particularly critical, and depend obviously on the format of thepunch 1 and the thickness therubber layer 3. - For example, for a 35 x 35 cm punch with a 4 mm rubber layer, the following millimetre dimensions can be used:
- groove depth 0.4-0.6
- grove width 2-5
- projection size 28-36
- recess size 22-30
-recess depth 3. - At this point it should be noted that the
recesses 6 shown in Figure 1 are arranged in marginal groups along the lateral bands of the punch, whereas the projections are grouped substantially along the diagonals of the punch. - This is in no way to be considered limitative, in that the
recesses 6 can be provided over the entire working surface of the punch, or more precisely in all therecesses 5. - It should also be noted that the particular distribution of the
recesses 6, as illustrated and described, is typically suitable for reverse face punches intended to cooperate with obverse face punches (ie those for forming the exposed face of the tile) with flat working faces. In contrast,recesses 6 are provided preferably over the entire working surface of thereverse face punch 1 if this is to cooperate with an obverse face punch with its working surface relief-patterned, for example embossed. - It should also be noted that the distribution of the
recesses 6 as shown in Figure 3 derives from the fact that the loading of the clay into the forming cavity is non-uniform both along those edges of the forming cavity parallel to the running direction of the loading carriage and along those edges perpendicular thereto. This is well known to the expert of the art. - According to the invention, with said
recesses 6 there is associated a plurality ofinterchangeable inserts 7, of which only one is shown in Figure 1, and which are intended to be inserted, practically as an exact fit, into saidrecesses 6. - Specifically, each
recess 6 has available a set of identicallyshaped inserts 7 which differ in thickness by 0.1-0.2 mm from each other. - Thus, by inserting said different-
thickness inserts 7,recesses 6 of different depths can be obtained, and be suitably distributed, for example in rows parallel to the sides of thepunch 1. - The
inserts 7 are of rubber construction, however if the surface of thepunch 1 is of metal the inserts will also be of metal. - Tile different-thickness rubber inserts are of the same material as the
layer 3 and, according to an alternative embodiment, the inserts associated with eachindividual recess 6 can all have substantially the same thickness, but have different elastic characteristics. - Again, in the case of inserts with different elastic characteristics, recesses of different depths can be obtained.
- What is important is that in all cases the working face of the
insert 7 must never lie below the base wall of thegroove 4, either when the insert is at rest or when the insert is undergoing pressing. - In this respect, with reference to Figures 3A and 3B, seeing that the
grooves 4 are provided to formcorresponding ribs 44 on the reverse face of thetile ribs 44, leading to tile transport problems. It should be noted that therecesses 6 can also hue any shape other than that shown. - Again, instead of the
grooves 4, impressions of another shape or type can be provided between therecesses 6, which other impressions could for example be the usual cavities for forming the characteristic feet of ceramic tiles. - The procedure for producing a uniformly compacted tile 111 (see Figure 3B) according to the invention is as follows.
- A usual forming mould is fitted with the described reverse face punch (or punches) 1, in the
recesses 6 of which respective standard inserts are inserted.Standard inserts 7 are those inserts having a thickness equal to the depth of therecesses 6. This is well illustrated to the right of Figure 2A. - The mould forming cavity (or cavities) is filled with clay in the usual manner, and then pressed to obtain the test tile indicated by 11 in Figure 3A, and which will probably not be uniformly compacted for the reasons given heretofore.
- In said Figure 3A, the
reference numerals tile 11 which have been shaped or formed by thecorresponding parts punch 1. - The tile formed in this manner is placed on a test bench, where the tile hardness or compactness is measured with a suitable instrument such as a penetrometer or durometer. These measurements are preferably made in all the
regions - The thickness of the
punch 1, or rather the pattern of its working face, is then modified locally on the basis of these readings or measurements. - This is done by placing inserts of thickness different from the standard in those
recesses 6 corresponding to thoseregions 77 of thetile 11 having hardness values which most differ from the mean value of the largest number of measurements of approximately equal value. - Specifically, inserts of greater thickness are placed in those
recesses 6 corresponding to tile regions of lesser hardnesses, and inserts of lesser thickness are placed in thoserecesses 6 corresponding to greater hardnesses. - This applies particularly, and in a totally general sense, to a
reverse face punch 1 associated with an obverse face punch (not shown) with a flat working face. In this respect, from the many tests carried out with apunch 1 according to the invention, it has been found that usually it is necessary to modify, in the sense of increasing, the punch thickness only locally, typically along the lateral bands, as most of the central region of the tile has substantially uniform compactness. After thepunch 1 has been modified in this manner afurther test tile 11 is formed and subjected to hardness measurements. If the measurements have remained more or less unchanged, tiles are then formed continuously and fed to the usual process cycles. Because of its uniform compacting, the tile has perfectly regular edges after firing, ie they are perfectly straight and mutually perpendicular. - However, if after said first punch modification the
tile 11 is still compacted non-homogeneously, the punch is further modified one or more times in the aforesaid manner until a uniformly compacted tile is obtained. - Said tests and modifications have to be made each time the mould production rate is changed or the clay formulation or mixture varied.
- In any event, using the aforesaid method tables can be prepared for a particular type of punch, to which reference can be made when at least one of the parameters which can influence the uniform compactness of the tiles varies.
- In other words, after said tables have been prepared, the forming press need be halted only for the time required to change the
inserts 7 when changing from one type of production to another. - The final punch, ie that modified for the purpose of uniformly compacting the
tiles 111, is partly shown in Figure 2B in which thereference numerals - Correspondingly, in Figure 3B the
reference numerals tile 111 which have been compacted by saidinserts - Finally, modifications can be made to the invention provided they fall within the following claims.
Claims (10)
- forming a ceramic test tile (11) within a forming cavity of a ceramic mould;
- measuring the hardness or compactness of said test tile at a plurality of points on its surface;
- locally varying, in the sense of increasing or reducing, the thickness of the punch (1) for forming the reverse face of the tile, in those regions of the punch corresponding to those tile hardness values which which are respectively lower and greater than the mean value of the largest number of measurements of approximately equal value;
- repeating said three operations, namely forming, measuring and varying, until a substantially uniformly compacted tile (111) is obtained;
- continuously forming other tiles (11) until the pressing conditions change.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90201228T ATE96368T1 (en) | 1989-05-30 | 1990-05-15 | PROCESS FOR THE PRODUCTION OF UNIFORMLY COMPACT CERAMIC SLABS AND DEVICE FOR PERFORMING THESE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT4684389 | 1989-05-30 | ||
IT8946843A IT1234151B (en) | 1989-05-30 | 1989-05-30 | METHOD FOR COINING UNIFORMLY COMPACTED CERAMIC TILES, MEANS TO IMPLEMENT THE SAID AND TILES SO OBTAINED |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0400704A2 true EP0400704A2 (en) | 1990-12-05 |
EP0400704A3 EP0400704A3 (en) | 1991-10-09 |
EP0400704B1 EP0400704B1 (en) | 1993-10-27 |
Family
ID=11259561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90201228A Expired - Lifetime EP0400704B1 (en) | 1989-05-30 | 1990-05-15 | Method for forming uniformly compacted ceramic tiles and means for its implementation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0400704B1 (en) |
AT (1) | ATE96368T1 (en) |
DE (1) | DE69004152T2 (en) |
IT (1) | IT1234151B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0570038A1 (en) * | 1992-05-15 | 1993-11-18 | MASS S.p.A. | Reverse-face ceramic die |
EP0605096A1 (en) * | 1992-12-28 | 1994-07-06 | Inax Corporation | Mold for tile |
EP0620089A2 (en) * | 1993-03-17 | 1994-10-19 | Maris Algeri | Isostatic die, particularly for ceramic tiles and relative method |
EP0569070B1 (en) * | 1992-05-07 | 1997-06-11 | MASS S.p.A. | Mold for forming ceramic products, tipically pressure-glazed tiles, and the relative loading means |
WO2003086722A1 (en) * | 2002-04-17 | 2003-10-23 | Molcer, S.A. | Vulcanised punch |
CN112976249A (en) * | 2021-02-04 | 2021-06-18 | 浙江大学 | Manufacturing template of laminated slab bottom plate with grooves in plate edges and production method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3097411A (en) * | 1963-07-16 | Apparatus for shaping pressure-shapable materials | ||
FR1384318A (en) * | 1964-02-12 | 1965-01-04 | Method and apparatus for the manufacture of pressed elements of a hardenable material, in particular for the production of wafers of ceramic or cement-based materials, and the like | |
DE1255554B (en) * | 1963-10-16 | 1967-11-30 | Dorst Keramikmasch | Method for pressing wall, floor or mosaic panels with top and bottom surfaces plane-parallel to one another made of powdery, in particular ceramic material, and a press for carrying out the method |
DE2155082A1 (en) * | 1971-11-05 | 1973-05-10 | Agrob Ag | TILE AND METHOD OF MANUFACTURING THE SAME |
GB1355521A (en) * | 1971-01-15 | 1974-06-05 | British Ceramic Res Ass | Die assemblies for pressing ceramic material |
GB2066147A (en) * | 1979-12-14 | 1981-07-08 | Baehre & Greten | Heated platten press |
-
1989
- 1989-05-30 IT IT8946843A patent/IT1234151B/en active
-
1990
- 1990-05-15 EP EP90201228A patent/EP0400704B1/en not_active Expired - Lifetime
- 1990-05-15 AT AT90201228T patent/ATE96368T1/en not_active IP Right Cessation
- 1990-05-15 DE DE90201228T patent/DE69004152T2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3097411A (en) * | 1963-07-16 | Apparatus for shaping pressure-shapable materials | ||
DE1255554B (en) * | 1963-10-16 | 1967-11-30 | Dorst Keramikmasch | Method for pressing wall, floor or mosaic panels with top and bottom surfaces plane-parallel to one another made of powdery, in particular ceramic material, and a press for carrying out the method |
FR1384318A (en) * | 1964-02-12 | 1965-01-04 | Method and apparatus for the manufacture of pressed elements of a hardenable material, in particular for the production of wafers of ceramic or cement-based materials, and the like | |
GB1355521A (en) * | 1971-01-15 | 1974-06-05 | British Ceramic Res Ass | Die assemblies for pressing ceramic material |
DE2155082A1 (en) * | 1971-11-05 | 1973-05-10 | Agrob Ag | TILE AND METHOD OF MANUFACTURING THE SAME |
GB2066147A (en) * | 1979-12-14 | 1981-07-08 | Baehre & Greten | Heated platten press |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0569070B1 (en) * | 1992-05-07 | 1997-06-11 | MASS S.p.A. | Mold for forming ceramic products, tipically pressure-glazed tiles, and the relative loading means |
EP0570038A1 (en) * | 1992-05-15 | 1993-11-18 | MASS S.p.A. | Reverse-face ceramic die |
EP0605096A1 (en) * | 1992-12-28 | 1994-07-06 | Inax Corporation | Mold for tile |
EP0620089A2 (en) * | 1993-03-17 | 1994-10-19 | Maris Algeri | Isostatic die, particularly for ceramic tiles and relative method |
EP0620089A3 (en) * | 1993-03-17 | 1995-03-15 | Maris Algeri | Isostatic die, particularly for ceramic tiles and relative method. |
WO2003086722A1 (en) * | 2002-04-17 | 2003-10-23 | Molcer, S.A. | Vulcanised punch |
CN112976249A (en) * | 2021-02-04 | 2021-06-18 | 浙江大学 | Manufacturing template of laminated slab bottom plate with grooves in plate edges and production method |
Also Published As
Publication number | Publication date |
---|---|
EP0400704A3 (en) | 1991-10-09 |
IT8946843A0 (en) | 1989-05-30 |
ATE96368T1 (en) | 1993-11-15 |
EP0400704B1 (en) | 1993-10-27 |
DE69004152D1 (en) | 1993-12-02 |
DE69004152T2 (en) | 1994-03-24 |
IT1234151B (en) | 1992-05-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8992814B1 (en) | Method for dry casting concrete blocks | |
EP0400704B1 (en) | Method for forming uniformly compacted ceramic tiles and means for its implementation | |
US3737276A (en) | Molding of powdered or granular material | |
US3534439A (en) | Molding apparatus | |
EP0556163B1 (en) | A die for ceramic tiles | |
US3705248A (en) | Molding of powdered or granular material | |
EP1136211B1 (en) | A device for forming ceramic products, including slabs, tiles and the like, by powder pressing | |
US3595518A (en) | Mold bed for molding cementitious products | |
US3717693A (en) | Dry pressing ceramic disk in mold having a multi-part female die | |
GB2107637A (en) | Moulding fired clay or ceramic articles | |
EP0570038B1 (en) | Reverse-face ceramic die | |
KR20070002569A (en) | Automatic machine for manufacturing yellow earth blocks with various deformations and process to manufacture yellow earth blocks with said automatic machine | |
DK180353B1 (en) | Brick punching system | |
JPH0653106U (en) | Tile mold | |
EP0569069B1 (en) | Ceramic mold for forming tiles, and the relative loading means | |
KR102645866B1 (en) | System that form design on pottery and method of forming design on pottery | |
SU923744A1 (en) | Injection mould for hot pressing of powders | |
JPH01160606A (en) | Manufacture of molded object | |
JPS609883B2 (en) | Tile pressure molding method with excellent dimensional accuracy and molds used for this method | |
JP2511745B2 (en) | Immediate demolding concrete block manufacturing method | |
US240605A (en) | Manufacture of brick | |
JPH03274439A (en) | Evaluating method of fluidity of material in power molding | |
EP1704975A2 (en) | Ceramic punch of the stamp type | |
JP2916087B2 (en) | Molding mold for curved tiles and method for manufacturing mold | |
GB2227705A (en) | Disposable plastic mould |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19911206 |
|
17Q | First examination report despatched |
Effective date: 19920925 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19931027 Ref country code: NL Effective date: 19931027 Ref country code: LI Effective date: 19931027 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19931027 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19931027 Ref country code: DK Effective date: 19931027 Ref country code: CH Effective date: 19931027 Ref country code: BE Effective date: 19931027 Ref country code: AT Effective date: 19931027 |
|
REF | Corresponds to: |
Ref document number: 96368 Country of ref document: AT Date of ref document: 19931115 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 69004152 Country of ref document: DE Date of ref document: 19931202 |
|
ITF | It: translation for a ep patent filed |
Owner name: ING. C. CORRADINI & C. S.R.L. |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
ET | Fr: translation filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19940503 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19940511 Year of fee payment: 5 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19940515 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19940531 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19940515 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19960201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19960229 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050515 |