EP1136212A1 - Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre - Google Patents

Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre Download PDF

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Publication number
EP1136212A1
EP1136212A1 EP00201040A EP00201040A EP1136212A1 EP 1136212 A1 EP1136212 A1 EP 1136212A1 EP 00201040 A EP00201040 A EP 00201040A EP 00201040 A EP00201040 A EP 00201040A EP 1136212 A1 EP1136212 A1 EP 1136212A1
Authority
EP
European Patent Office
Prior art keywords
powders
continuous belt
pressing
pressed
forming
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
Application number
EP00201040A
Other languages
German (de)
English (en)
Other versions
EP1136212B1 (fr
Inventor
Franco Stefani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
System SpA
Original Assignee
Ronflette SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ronflette SA filed Critical Ronflette SA
Priority to PT00201040T priority Critical patent/PT1136212E/pt
Priority to ES00201040T priority patent/ES2212961T3/es
Priority to DE2000607958 priority patent/DE60007958T2/de
Priority to EP20000201040 priority patent/EP1136212B1/fr
Publication of EP1136212A1 publication Critical patent/EP1136212A1/fr
Application granted granted Critical
Publication of EP1136212B1 publication Critical patent/EP1136212B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping
    • B28B5/02—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
    • B28B5/021—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of definite length
    • 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
    • B28B7/0058—Moulds, cores or mandrels with provisions concerning the elimination of superfluous material; Moulds with burr-removing means provided therein or carried thereby
    • 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
    • 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
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/44—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for treating with gases or degassing, e.g. for de-aerating

Definitions

  • the prior art in the field of forming ceramic tiles is based on the use of dies inserted into presses.
  • the dies are, schematically speaking, constituted by a cavity into which powders are deposited, and by at least one punch having the task of pressing the deposited powders.
  • dies in which the cavity is not made in the bottom die; this is instead used for depositing a layer of powders which is then pressed by the top die or punch.
  • Delimitation and lateral containment of the material to be pressed to form the tile or slab is performed by a forming frame associated to the punch or top die, which is mobile and projects from the top die so that it can remain in contact with the bottom plane (bearing the powders to be pressed) during the pressing operation.
  • the forming is performed in a substantially two-stage pressing operation: a first stage, characterised by a considerable reduction in the volume of the blank tile, during which stage there is also an expulsion of air trapped in the material; a second stage, in which the by-now air-free material is further compressed, with a consequent further but smaller reduction in volume thereof.
  • the forming is thus completed.
  • the two-stage pressing operation requires specific press predisposition and management which are necessarily time-consuming and result in considerably longer production times than in those processes which require only one pressing stage.
  • the main aim of the present invention is to provide an improved device for forming ceramic products, such as slabs, tiles and the like, by powder pressing, which device enables pressing to be performed in a single stage but without those limitations and drawbacks which characterise the prior art.
  • the invention is constructionally simple and functional.
  • a further advantage of the invention is that it enables a considerable reduction in cycle times to be achieved, with an evident and immediate improvement in productivity.
  • 1 denotes in its entirety a device for forming ceramic products, such as slabs, tiles and the like, by powder pressing, which device 1 is schematically constituted by a press 11 having a central aperture crossed by a lower element 2, constituted by a lower continuous belt 12 exhibiting a lower rest plane 3 for bearing the powders to be pressed 20, and by an upper element 4, constituted by a horizontal branch of a continuous belt 15, ring-wound and stretched between two horizontal-axis drums 16 positioned externally, which belt 15 is moved in synchrony with the lower continuous belt 12 constituting the lower element 2.
  • the lower element 2 lies and slides along an upper surface of the piston 10 of the press 11 and is commanded by the piston 10 to displace upwards in order to exert the pressing action.
  • the upper element 4 is provided with a plurality of active surfaces 5, located and distributed in a predetermined order along the upper continuous belt 15. At each pressing event the active surfaces 5 are brought into contact with the rest plane 3 of the lower continuous belt 12.
  • Each active surface 5 is characterised in that it is provided with a forming frame 6 which projects inferiorly (when the active surface 5 is in contact with the rest plane 3) and is predisposed in such a way as to delimit at its perimeter a closed pressing zone.
  • the forming frame 6 exhibits an internal part 7 which carries out the pressing of the edge of the final pressed product.
  • This internal part 7 is externally delimited by an edge 8 having a depth, measuring in the pressing direction, which is not less than or is equal to that of the central body of the final pressed product.
  • the internal part 7 inferiorly projects with respect to the active surface 5 and presents a depth which gradually decreases as it distances from the edge 8.
  • the whole forming frame 6 is constituted by a material having considerable elastic deformability (rubber or another elastomer).
  • the upper branch of the lower continuous belt 12 is moved in synchrony with the lower branch of the upper continuous belt 15.
  • the lower rest plane 3 also functions as the bottom die of the forming device.
  • the piston 10 rises, raising the part of the lower element 2 on which the powder to be pressed has been deposited, thus pressing the powder against the active surface 5 delimited by the forming frame 6 of the upper continuous belt 15.
  • the whole pressing operation is completed in a single phase (i.e. in a single continuous upwards stroke by the piston 10) and in a depressed environment, as will be explained herein below.
  • Means are provided for sealingly isolating and closing off at least a part of the powders 20 comprised between the lower element 2 and the upper element 4, confining that part of the powders 20 in an isolated environment 17.
  • the means for isolating comprise lateral walls 9 which describe a closed perimeter.
  • the walls 9 are of constant depth and project in the direction of relative motion between elements 2 and 4 during the pressing cycle.
  • the walls 9 are made of a very elastically-deformable material, such as rubber or another elastomer, and are of a size such as to realise an isolated environment 17 just before the powder pressing 20 begins.
  • means for aspirating which aspirate the air from the isolated environment 17 in order to create a depression.
  • the means for aspirating comprise aspiration ducts 13 located peripherally of the lateral walls 9 and internally of the perimeter the walls 9 define.
  • the aspiration ducts 13 lead into aspiration conduits 14 afforded in the upper body (fixed punch) of the press 11, i.e. the aspiration ducts 13 are in fact through-holes made in the upper continuous belt 15, which is, as mentioned herein above, ring-wound and stretched between two parallel-axis drums 16 positioned externally of the press 11.
  • the lower branch of the upper continuous belt 15 constitutes the upper element 4 which is provided with at least one active surface 5 which faces the lower rest plane 3 and is provided with a forming frame 6 which projects inferiorly and is located such as to delimit a perimeter of a closed pressing zone.
  • the forming frame 6 is not only designed to create a closed pressing zone which will generate a final pressed product, but also generates, following the pressing operation, an edge zone of the final pressed product which is characterised by a greater density than that of the internal zones of the final pressed product, though a smaller depth.
  • the forming frame 6 exhibits an internal part 7 especially formed and designed to press the edge zone; the internal part 7 being externally delimited by an edge 8 which is of a depth (measuring in the pressing direction) that is equal or not inferior to the central body of the final pressed product.
  • the aspiration ducts 13 are afforded in the upper continuous belt 15 in the zone comprised between the walls 9 and the edge 8, and are therefore in direct communication with the annular zone comprised between the walls 9 and the edge 8.
  • the aspiration ducts 13 are positioned so as to coincide with the aspiration conduits 14.
  • the lower element 2 is constituted by an upper branch of the lower continuous belt 12, which upper branch moves in synchrony with the lower branch of the upper continuous belt 15.
  • a further advantage of the present invention is that formation operations of large-format but relatively slim slabs and tiles are completed much more quickly.
EP20000201040 2000-03-23 2000-03-23 Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre Expired - Lifetime EP1136212B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PT00201040T PT1136212E (pt) 2000-03-23 2000-03-23 Dispositivo aperfeicoado para fabricar ceramicos incluindo lajes e semelhantes por prensagem de po
ES00201040T ES2212961T3 (es) 2000-03-23 2000-03-23 Dispositivo mejorado para el moldeado de productos ceramicos, incluidos azulejos, baldosas, losas y similares, mediante prensado de polvos.
DE2000607958 DE60007958T2 (de) 2000-03-23 2000-03-23 Verbesserte Vorrichtung zum Herstellen von keramischen Gegenständen wie zum Beispiel Platten , Fliesen und ähnlichen Artikeln durch Pressen von Pulver
EP20000201040 EP1136212B1 (fr) 2000-03-23 2000-03-23 Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20000201040 EP1136212B1 (fr) 2000-03-23 2000-03-23 Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre

Publications (2)

Publication Number Publication Date
EP1136212A1 true EP1136212A1 (fr) 2001-09-26
EP1136212B1 EP1136212B1 (fr) 2004-01-28

Family

ID=8171241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000201040 Expired - Lifetime EP1136212B1 (fr) 2000-03-23 2000-03-23 Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre

Country Status (4)

Country Link
EP (1) EP1136212B1 (fr)
DE (1) DE60007958T2 (fr)
ES (1) ES2212961T3 (fr)
PT (1) PT1136212E (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004045842A1 (fr) * 2002-11-20 2004-06-03 Fernandez Vicente Rafael Dispositif d'aspiration pour presses de fabrication de ceramique
US11020875B2 (en) 2015-11-16 2021-06-01 System Ceramics S.P.A. Forming element for ceramic articles
WO2022041381A1 (fr) * 2020-08-27 2022-03-03 佛山市富域新材料有限公司 Moule de formage de carreaux en céramique, procédé de démoulage et processus de préparation d'ébauches de carreaux en céramique utilisant un moule de formage de carreaux en céramique et procédé de démoulage
EP3377284B1 (fr) * 2015-11-16 2023-01-11 System Ceramics S.p.A. Dispositif de pressage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110509401B (zh) * 2019-07-31 2020-06-26 佛山市富域新材料有限公司 一种瓷砖生产装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB647144A (en) * 1947-07-17 1950-12-06 Malkin Tiles Burslem Ltd Improvements in and relating to die boxes for moulding clay tiles
DE1142265B (de) * 1956-10-11 1963-01-10 Jurid Werke Gmbh Verfahren zum Herstellen von zu sinternden Presslingen aus Metallpulver
DE1965173A1 (de) * 1969-12-27 1971-07-22 Steinzeug Und Mosaikplattenfab Verfahren zur Herstellung von trittsicheren,mit Nocken versehenen,trockengepressten keramischen Steinzeugfliesen
GB2260318A (en) * 1991-09-17 1993-04-14 Daiken Corp An inorganic plate
WO1996015888A1 (fr) * 1994-11-22 1996-05-30 Carlo Antonio Camorani Procede de compactage de poudres et appareil associe
WO1998023424A2 (fr) * 1996-11-22 1998-06-04 Carlo Antonio Camorani Fabrication de matieres pulverulentes
US5779957A (en) * 1993-12-16 1998-07-14 Materiaux De Construction International Article, in particular a building covering plate, and process for manufacturing said article

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB647144A (en) * 1947-07-17 1950-12-06 Malkin Tiles Burslem Ltd Improvements in and relating to die boxes for moulding clay tiles
DE1142265B (de) * 1956-10-11 1963-01-10 Jurid Werke Gmbh Verfahren zum Herstellen von zu sinternden Presslingen aus Metallpulver
DE1965173A1 (de) * 1969-12-27 1971-07-22 Steinzeug Und Mosaikplattenfab Verfahren zur Herstellung von trittsicheren,mit Nocken versehenen,trockengepressten keramischen Steinzeugfliesen
GB2260318A (en) * 1991-09-17 1993-04-14 Daiken Corp An inorganic plate
US5779957A (en) * 1993-12-16 1998-07-14 Materiaux De Construction International Article, in particular a building covering plate, and process for manufacturing said article
WO1996015888A1 (fr) * 1994-11-22 1996-05-30 Carlo Antonio Camorani Procede de compactage de poudres et appareil associe
WO1998023424A2 (fr) * 1996-11-22 1998-06-04 Carlo Antonio Camorani Fabrication de matieres pulverulentes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004045842A1 (fr) * 2002-11-20 2004-06-03 Fernandez Vicente Rafael Dispositif d'aspiration pour presses de fabrication de ceramique
US11020875B2 (en) 2015-11-16 2021-06-01 System Ceramics S.P.A. Forming element for ceramic articles
EP3377284B1 (fr) * 2015-11-16 2023-01-11 System Ceramics S.p.A. Dispositif de pressage
WO2022041381A1 (fr) * 2020-08-27 2022-03-03 佛山市富域新材料有限公司 Moule de formage de carreaux en céramique, procédé de démoulage et processus de préparation d'ébauches de carreaux en céramique utilisant un moule de formage de carreaux en céramique et procédé de démoulage

Also Published As

Publication number Publication date
DE60007958T2 (de) 2004-12-16
DE60007958D1 (de) 2004-03-04
ES2212961T3 (es) 2004-08-16
EP1136212B1 (fr) 2004-01-28
PT1136212E (pt) 2004-05-31

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