EP1358982A2 - Unité de traitement et procédé pour décorer des objets en céramique - Google Patents
Unité de traitement et procédé pour décorer des objets en céramique Download PDFInfo
- Publication number
- EP1358982A2 EP1358982A2 EP03009956A EP03009956A EP1358982A2 EP 1358982 A2 EP1358982 A2 EP 1358982A2 EP 03009956 A EP03009956 A EP 03009956A EP 03009956 A EP03009956 A EP 03009956A EP 1358982 A2 EP1358982 A2 EP 1358982A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction
- etching
- openings
- unit
- ceramic products
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 13
- 238000005530 etching Methods 0.000 claims abstract description 26
- 238000004040 coloring Methods 0.000 claims abstract description 23
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 9
- 238000005034 decoration Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 description 18
- 239000011265 semifinished product Substances 0.000 description 14
- 239000004927 clay Substances 0.000 description 11
- 238000003825 pressing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0295—Treating the surface of the fed layer, e.g. removing material or equalization of the surface
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/022—Feeding several successive layers, optionally of different materials
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
- B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
Definitions
- the present invention relates to a processing unit for decorating ceramic products.
- products are decorated by depositing colouring substances on a flat surface of a semifinished product of fresh clay, and then pressing the semifinished product to press the colouring substances into the clay.
- the drawbacks of this method derive from the limited amount of colouring substance that can be deposited, and possible loss of definition caused by pressing.
- One solution to the above drawbacks is to etch the pattern on the semifinished product and deposit the colouring substances inside the depression, thus increasing the amount of colouring substance that can be used, and preventing the coloured pattern from being flawed when pressed.
- One etching method employs a roller having a raised outer surface defining the pattern to be reproduced on the semifinished ceramic product.
- the roller is placed idly on the semifinished product, which, as it travels beneath the roller, rotates it and at the same time is impressed with the desired pattern.
- This solution has the drawback of requiring periodic maintenance of the roller, on which a layer of soft clay is inevitably deposited during operation, thus impairing the efficiency of the roller.
- Another decorative requirement of the ceramic industry is to produce ceramic products with etched patterns on the visible surfaces.
- This type of product is normally made using dies at the pressing step, on which the pattern to be etched is formed in relief and impressed onto the semifinished ceramic product.
- This solution has the drawback of etching the pattern after the colouring step, thus altering or even impairing the existing coloured decoration.
- a unit for decorating ceramic products comprising etching means and characterized in that said etching means comprise shielding means having a number of openings; and suction means for removing non-pressed ceramic material through said openings by suction.
- a method of decorating ceramic products comprising at least one etching step of etching a semifinished ceramic product, and characterized in that said etching step comprises a suction operation to remove non-pressed ceramic material by suction through a number of openings defining as a whole a decorative pattern.
- the processing unit according to the present invention therefore produces the etched pattern prior to the colouring step, and does not require frequent maintenance, in that, as opposed to preventing continuation of the operation, the dust removed by suction is recycled, thus solving the problem of material wastage and disposal. Moreover, the above method also enables alterations to the pattern by adjusting the amount of suction or closure of certain openings.
- Number 1 in Figure 1 indicates as a whole a system for producing ceramic products.
- Figure 1 shows a cavity 2 for receiving fresh clay to form a semifinished ceramic product 3, and for supporting the semifinished product at the decorating step; and a carriage 4 located over and movable with respect to cavity 2 in a direction Z.
- Carriage 4 supports a grille 5 defining a loading station 5a for loading cavity 2; and a unit 6 for decorating the semifinished product.
- unit 6 comprises etching means 7 defining an etching station 7a; and colouring means 8 defining a colouring station 8a.
- etching means 7 comprise a container 9 having a convex bottom wall 10, in which is formed an opening 11; a vacuum pump 12 (shown schematically) for producing a vacuum inside container 9; and a flexible shielding member 13 having a number of microholes 14 formed using LASER techniques and defining as a whole a decorative pattern.
- Shielding member 13 is defined by a belt member 15 moving with respect to and sliding in contact with bottom wall 10. More specifically, belt member 15 is made of thermoplastic material, and is wound at the ends about two respective rollers 16 for moving belt member 15.
- belt member 15 is made of thermoplastic material, and is wound at the ends about two respective rollers 16 for moving belt member 15.
- etching step to produce depressions 17 carriage 4 moves with respect to cavity 2 in direction Z, and microholes 14 in belt member 15 travel past opening 11 to select the parts of semifinished product 3 from which to remove fresh clay by suction and so form the etched pattern.
- the area of semifinished product 3 from which clay has been removed by suction is brought into follow-up colouring station 8a, where colouring means 8 deposit colouring substances into depressions 17 formed in the semifinished product by etching means 7.
- System 18 indicates as a whole a system for producing ceramic products, any parts of which identical to the corresponding parts of system 1 are indicated using the same reference numbers with no further description.
- System 18 comprises a decorating unit 19, in which etching means 20, defining an etching station 20a, comprise a cylinder 21, in which a number of microholes 22 are formed using LASER techniques; and a suction inlet 23 housed inside cylinder 21, having an opening 24 facing the semifinished product, and connected to a vacuum pump indicated schematically by 25.
- Cylinder 21 rotates about an axis of rotation 26, and, as carriage 4 moves along, feeds microholes 22 past opening 24 facing the semifinished product, to select the parts of semifinished product 3 from which to remove fresh clay by suction.
- the unit according to the present invention thus provides, in an extremely straightforward manner, for producing a well defined etched pattern, while at the same time salvaging and recycling the removed soft clay for further use.
- the processing unit according to the present invention is also highly versatile by producing both ceramic products with etched patterns, and ceramic products with much more attractive coloured patterns than those obtainable by the known state of the art. As stated, in fact, by depositing the colouring substances inside preformed depressions, definition of the coloured portion is enhanced, and a larger quantity of colouring substance can be used to achieve a highly attractive effect.
- the pattern can be changed easily and cheaply by simply changing the belt member, which, being flexible, is extremely easy to carry.
- the removed fresh clay may be salvaged continuously by providing the vacuum pump with a clay dumping conduit.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2002BO000253A ITBO20020253A1 (it) | 2002-05-03 | 2002-05-03 | Gruppo di lavorazione per la realizzazione di decori su manufatti ceramici e relativo |
ITBO20020253 | 2002-05-03 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1358982A2 true EP1358982A2 (fr) | 2003-11-05 |
EP1358982A3 EP1358982A3 (fr) | 2004-05-19 |
EP1358982B1 EP1358982B1 (fr) | 2005-10-05 |
Family
ID=11440099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03009956A Expired - Fee Related EP1358982B1 (fr) | 2002-05-03 | 2003-04-30 | Unité de traitement et procédé pour décorer des objets en céramique |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1358982B1 (fr) |
DE (1) | DE60301754T2 (fr) |
ES (1) | ES2247450T3 (fr) |
IT (1) | ITBO20020253A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0659526A1 (fr) * | 1993-12-21 | 1995-06-28 | Cca Inc. | Procédé de fabrication d'un élément moulé comportant un motif |
EP0927687A2 (fr) * | 1997-12-23 | 1999-07-07 | Maris Algeri | Procédé et dispositif pour transférer un matériau granuleux |
EP1043133A2 (fr) * | 1999-04-02 | 2000-10-11 | Martinelli Ettore s.r.l. | Presse pour la fabrication de carreaux avec dispositif d'alimentation pour deux couches de matériaux |
-
2002
- 2002-05-03 IT IT2002BO000253A patent/ITBO20020253A1/it unknown
-
2003
- 2003-04-30 ES ES03009956T patent/ES2247450T3/es not_active Expired - Lifetime
- 2003-04-30 DE DE60301754T patent/DE60301754T2/de not_active Expired - Fee Related
- 2003-04-30 EP EP03009956A patent/EP1358982B1/fr not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0659526A1 (fr) * | 1993-12-21 | 1995-06-28 | Cca Inc. | Procédé de fabrication d'un élément moulé comportant un motif |
EP0927687A2 (fr) * | 1997-12-23 | 1999-07-07 | Maris Algeri | Procédé et dispositif pour transférer un matériau granuleux |
EP1043133A2 (fr) * | 1999-04-02 | 2000-10-11 | Martinelli Ettore s.r.l. | Presse pour la fabrication de carreaux avec dispositif d'alimentation pour deux couches de matériaux |
Also Published As
Publication number | Publication date |
---|---|
EP1358982A3 (fr) | 2004-05-19 |
DE60301754T2 (de) | 2006-07-06 |
ITBO20020253A1 (it) | 2003-11-03 |
EP1358982B1 (fr) | 2005-10-05 |
ITBO20020253A0 (it) | 2002-05-03 |
ES2247450T3 (es) | 2006-03-01 |
DE60301754D1 (de) | 2005-11-10 |
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