EP0121128A2 - Presse pour la fabrication d'assiettes ou analogues - Google Patents

Presse pour la fabrication d'assiettes ou analogues Download PDF

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Publication number
EP0121128A2
EP0121128A2 EP84102332A EP84102332A EP0121128A2 EP 0121128 A2 EP0121128 A2 EP 0121128A2 EP 84102332 A EP84102332 A EP 84102332A EP 84102332 A EP84102332 A EP 84102332A EP 0121128 A2 EP0121128 A2 EP 0121128A2
Authority
EP
European Patent Office
Prior art keywords
membrane
press
edge
ram
press ram
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.)
Ceased
Application number
EP84102332A
Other languages
German (de)
English (en)
Other versions
EP0121128A3 (fr
Inventor
Hilmar Suffa
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.)
DORST Technologies GmbH and Co KG
Original Assignee
DORST Technologies GmbH and Co KG
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 DORST Technologies GmbH and Co KG filed Critical DORST Technologies GmbH and Co KG
Publication of EP0121128A2 publication Critical patent/EP0121128A2/fr
Publication of EP0121128A3 publication Critical patent/EP0121128A3/fr
Ceased 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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses

Definitions

  • the invention relates to a press for the production of plates or the like.
  • a press ram that can be moved up to press against a counter mold, which is shaped according to the inner shape of the plate to be pressed or the like, and with a cavity closing in the counter mold on it the dimensions of the edge of the finished plate, clamped edge, elastic membrane, which is provided with an annular groove corresponding to the foot of the plate and on the powdered porcelain mass with a ram driven at a distance from it the limits given by the clamping can be distributed, the cavity covered by the membrane being able to be filled with a pressure medium which can be pressurized after the press ram has been moved up to the powdered porcelain material distributed on the membrane.
  • Such a press is generally known from DE-PS 26 27 160.
  • the plates produced on a press according to DE-PS 26 27 160 have at the edge a pressure wedge-shaped tapered edge which must be removed in a further operation using several cleaning tools so that the desired rounding of the plate edge or rim is created.
  • Such post-processing is necessary for plates with a fixed edge, i.e. practically impossible with a curved edge.
  • edge of the plate runs out in a wedge-shaped manner is that the pressed plates open up slightly after the pressing process, i.e. that its outer diameter becomes larger, so that when the rim of the plate is held by the membrane or other parts of the press, the lifting of the plates is considerably more difficult and the plates may be damaged when lifting off. If, however, the edge of the plate runs out in a wedge shape, the clamping forces are correspondingly lower. However, such tapered edges on the finished plates are undesirable and must be rounded again with considerable material removal. If the edge is fixed, removal of material is practically impossible, especially in the recesses.
  • the object of the invention is to make the arrangement in the edge area so that a plate edge is formed which only needs to be reworked on the underside of the plate, but otherwise rests freely on the membrane after the pressing die has been moved off and can therefore be removed without difficulty.
  • the press ram has a coating which has an annular bulge bulging in the directions on the membrane at the edge.
  • This annular bead is preferably a hollow bead.
  • This ring bead sits on the membrane when the ram is placed. Since the membrane is acted upon by pressure medium on the underside, the annular bead is displaced upwards, whereby it only moves in the direction of the filling material, i.e. the ceramic material on the membrane can dodge inside. Thus, when it is pressed flat against the press ram, it shifts the edge of the pressed material somewhat inwards. If the pressure forces of the pressure medium are released, the ring bulge can reform because the membrane also deforms again. The plate can relax freely and the risk of damage to the plate when relaxing is eliminated.
  • the teaching according to DE-OS 29 33 226.1 can advantageously be combined with the teaching according to the invention according to claim 1 and / or 2, since then the ring bead on the press ram when it is placed on the membrane in the ring groove arranged opposite it. Since the part of the membrane lying under the annular groove can primarily be acted upon by pressure medium, the annular bead is specifically shifted upwards and can practically only in the direction of the filling material, i.e. the ceramic material, dodge inside. The effect that can be achieved by the basic idea of the invention is thus perfected and strengthened.
  • the effective surface of the ram after filling the membrane and placing the ram before the start of the pressing process can be reduced in diameter by applying pressure to the membrane, so that after the pressing process when relaxing, the coating on the outer circumference is enlarged if the press ram has a coating on the circumference, which is provided on the edge with a bulging ring in the direction of the membrane.
  • the fixation of the coating on the inner stamp part can take place and / or be supported in that the coating of the press ram in the area of the inclined surface has a projection that lies over this inclined surface, which is hooked at its end via a bead in a groove of the inner stamp part .
  • a retaining ring 2 is placed, which holds the membrane 3 via an attachment 4.
  • the membrane 3 is also held in place by a ring 5 in the insert 6.
  • the insert 6 has openings so that the pressure medium can be brought into effect directly below the membrane.
  • the membrane is provided on the side opposite the press ram with a circumferential annular groove 7.
  • the press ram 10 has a coating 8 with an annular bead 9 which is arranged exactly opposite the annular groove 7.
  • this annular bead 9 is a hollow bead.
  • the membrane 3 is fixed at the edge area, so that when the underside of the membrane is acted upon with the aid of a pressure medium, the plate schematically indicated at 12 from the powdery one indicated at 13 in FIG. 1 Porcelain mass is created.
  • the plate rim 14 is thus released and the plate can be removed without difficulty after opening the press.
  • Fig. 4 21 is the counter-shape, on which a retaining ring 22 is placed, which holds the membrane 23 via an extension 24.
  • the membrane 23 is held in place by a ring 25 in the insert 26.
  • the insert 26 has openings so that the pressure medium can be brought into direct contact with the membrane 23.
  • the membrane is provided with a circumferential annular groove 27 at the edge.
  • the press ram consists of an inner ram part 30 and a wedge ring 31 surrounding this inner ram part 30, which protrudes in the direction of the counter mold 21 and has an inner boundary surface 32 which runs from the inside to the outside.
  • the apex 33 is flattened.
  • the wedge ring 31 is fastened by means of screws 34 to the base body 35 of the press ram.
  • Inside the wedge ring is the inner stamp part 30, which is also on the base body 35 by means of screws 36, but with play and against Effect of compression springs 37 is attached.
  • a coating 38 extends over the inner punch part 30 and the wedge ring 31 and has an annular bead 39 above the apex 33 of the wedge ring 31.
  • the base body 35 is surrounded by a spring-mounted ring 41.
  • the coating 38 has, at the transition from the inner press part 30 to the wedge ring 31, an extension 40 pointing into the inside of the press die, which is fixed to the inner die part 30 with a bead 42 at the end of the inclined surface which is essentially parallel to the boundary surface 32.
  • the ring 41 first sits on the edge of the counter-shape 21 and the outermost edge of the membrane 23, as a result of which the membrane 23 is fixed in the edge region.
  • the coating 38 strikes the filled porcelain mass over the inner ram part 30 and is raised relative to the wedge ring 31 against the action of the springs 37, as a result of which the coating 38 is displaced inward in this area.
  • pressure medium is applied under the membrane 23 and the finished plate 42 is produced from the porcelain mass 43 (cf. FIG. 5).
  • the press according to the invention is not only suitable for producing plates with a festonized edge, but can also be used advantageously for plates with a smooth edge, because the problem of demolding also plays a role here.
  • the invention is also not limited to vertical presses. The problem described at the outset also occurs with horizontal press training and can be solved according to the invention.

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)
  • Food-Manufacturing Devices (AREA)
EP84102332A 1983-03-30 1984-03-05 Presse pour la fabrication d'assiettes ou analogues Ceased EP0121128A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3311685 1983-03-30
DE3311685 1983-03-30
DE19833332277 DE3332277A1 (de) 1983-03-30 1983-09-07 Presse zum herstellen von tellern od. dgl.
DE3332277 1983-09-07

Publications (2)

Publication Number Publication Date
EP0121128A2 true EP0121128A2 (fr) 1984-10-10
EP0121128A3 EP0121128A3 (fr) 1986-02-05

Family

ID=25809586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102332A Ceased EP0121128A3 (fr) 1983-03-30 1984-03-05 Presse pour la fabrication d'assiettes ou analogues

Country Status (3)

Country Link
US (1) US4518341A (fr)
EP (1) EP0121128A3 (fr)
DE (1) DE3332277A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250012A2 (fr) * 1986-06-18 1987-12-23 Fonderie Officine Meccaniche BONGIOANNI S.p.A. Dispositif de fixation d'une membrane en élastomère sur une matrice supérieure utilisée pour la fabrication d'articles en céramique
EP0391547A1 (fr) * 1989-03-13 1990-10-10 Ngk Insulators, Ltd. Procédé pour la fabrication des pièces céramiques
EP0637489A1 (fr) * 1993-08-03 1995-02-08 Erich Netzsch GmbH & Co. Holding KG Outillage pour le pressage isostatique d'objets creux à parois fortement inclinées en matériau céramique

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512852A1 (de) * 1985-04-10 1986-10-16 Dorst - Maschinen- und Anlagen-Bau Otto Dorst u. Dipl. Ing. Walter Schlegel GmbH & Co, 8113 Kochel Presswerkzeug zur herstellung von schalenfoermigen presskoerpern, insbesondere platten, tellern, bechern, schuesseln od.dgl. aus pulverfoermigem, vorzugsweise keramischen material
US4915890A (en) * 1987-09-17 1990-04-10 The Dow Chemical Company Casting process
US5034448A (en) * 1987-09-17 1991-07-23 The Dow Chemical Company Slip composition for whiteware articles
JPH085049B2 (ja) * 1989-04-14 1996-01-24 日本碍子株式会社 セラミックス等方加圧成形用治具及びセラミックス等方加圧成形方法
US7972129B2 (en) * 2005-09-16 2011-07-05 O'donoghue Joseph Compound tooling system for molding applications
EP1882571B1 (fr) * 2006-07-26 2012-08-08 Ta-Ro Progetti s.n.c. di Tagliati Rodolfo E C. Moule isostatique pour formation de carreau
IT1400599B1 (it) * 2010-06-18 2013-06-14 Trebax S R L Stampo per fabbricare manufatti ceramici.
CN102139509B (zh) * 2011-01-13 2012-03-07 宁波韵升股份有限公司 一种带内环陶瓷制品的制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462982A1 (fr) * 1979-08-16 1981-02-20 Dorst Keramikmasch Membrane pour une presse utilisee pour la fabrication d'assiettes ou de pieces analogues
EP0043019A1 (fr) * 1980-07-01 1982-01-06 Keramikmaschinen-Bau Dorst Outil de pressage pour la fabrication de corps pressés en forme de plat, en particulier des plaques, des assiettes, des tasses, des plats ou analogue en matière pulvérulente, de préférence en matière céramique
DE3145199A1 (de) * 1981-11-13 1983-06-01 Dorst - Maschinen- und Anlagen-Bau Otto Dorst u. Dipl.-Ing. Walter Schlegel GmbH & Co, 8113 Kochel Presswerkzeug zum herstellen keramischer formlinge, insbesondere teller, aus pulverfoermiger masse

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156958A (en) * 1964-11-17 Foundry molding machine
DE379391C (de) * 1920-04-23 1923-08-21 Leandro Cucurny Verfahren und Einrichtung zum Formen von Tellern und aehnlichen keramischen Gebrauchsgegenstaenden
US2575734A (en) * 1947-12-30 1951-11-20 Westinghouse Electric Corp Press
US2519661A (en) * 1948-02-14 1950-08-22 Onondaga Pottery Company Apparatus for fixing transfers
US3173974A (en) * 1959-10-01 1965-03-16 Shenango China Inc Method and apparatus for dry-pressing ceramic objects
DE1235787B (de) * 1961-03-13 1967-03-02 Keramische Ind Bedarfs Kom Ges Trockenpresse zum Herstellen von Geschirrteilen
US3256375A (en) * 1962-02-07 1966-06-14 Interessentskatet Thermodyn Method of preparing a coated molding from wood particles
US3520961A (en) * 1967-05-12 1970-07-21 Yuken Ind Co Ltd Method for manufacturing ceramic articles
JPS50304B1 (fr) * 1969-01-16 1975-01-08
US3594877A (en) * 1969-10-24 1971-07-27 Yuken Kogyo Co Ltd Apparatus for manufacturing ceramic articles
US3664799A (en) * 1969-11-04 1972-05-23 American Standard Inc Powder compacting press
GB1315523A (en) * 1970-04-14 1973-05-02 British Ceramic Res Ass Pressing of articles from materials in a finely divided state
US3650657A (en) * 1970-08-05 1972-03-21 Nat Forge Co Yoke type isostatic press
CH569561A5 (fr) * 1972-06-12 1975-11-28 Roessler Ag
US4043724A (en) * 1975-07-11 1977-08-23 Dorst-Keramikaschinen-Bau Otto Dorst U. Dipl. -Ing. Walter Schlegel Device for pressing articles such as plates from pulverulent porcelain composition
DE2627160C3 (de) * 1976-06-16 1984-08-30 Dorst-Keramikmaschinen-Bau Otto Dorst u. Dipl. Ing. Walter Schlegel, 8113 Kochel Verfahren zum Herstellen von Tellern o.dgl. mittels einer Presse sowie Presse zur Durchführung des Verfahrens
DE2637231C3 (de) * 1976-08-18 1982-03-04 Dorst-Keramikmaschinen-Bau Otto Dorst U. Dipl.-Ing. Walter Schlegel, 8113 Kochel Vorrichtung zum Pressen keramischen Pulvers zu topfartigen Formkörpern
DE2948643A1 (de) * 1979-12-04 1981-06-11 Laeis-Werke Ag, 5500 Trier Pressform, insbesondere fuer keramische formteile
DE3028296A1 (de) * 1980-07-25 1982-03-04 Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb Verfahren zum herstellen von tellern mit festoniertem rand sowie press- und putzwerkzeuge zum durchfuehren des verfahrens
DE3128347A1 (de) * 1981-07-17 1983-02-03 Eugen Dipl.-Ing. 8871 Burtenbach Bühler Verfahren und einrichtung zur herstellung von formlingen aus rieselfaehiger masse stichwort: "beibehaltung des fuellvakuums beim isostatischen pressen"

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462982A1 (fr) * 1979-08-16 1981-02-20 Dorst Keramikmasch Membrane pour une presse utilisee pour la fabrication d'assiettes ou de pieces analogues
EP0043019A1 (fr) * 1980-07-01 1982-01-06 Keramikmaschinen-Bau Dorst Outil de pressage pour la fabrication de corps pressés en forme de plat, en particulier des plaques, des assiettes, des tasses, des plats ou analogue en matière pulvérulente, de préférence en matière céramique
DE3145199A1 (de) * 1981-11-13 1983-06-01 Dorst - Maschinen- und Anlagen-Bau Otto Dorst u. Dipl.-Ing. Walter Schlegel GmbH & Co, 8113 Kochel Presswerkzeug zum herstellen keramischer formlinge, insbesondere teller, aus pulverfoermiger masse

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250012A2 (fr) * 1986-06-18 1987-12-23 Fonderie Officine Meccaniche BONGIOANNI S.p.A. Dispositif de fixation d'une membrane en élastomère sur une matrice supérieure utilisée pour la fabrication d'articles en céramique
EP0250012A3 (fr) * 1986-06-18 1989-09-27 Fonderie Officine Meccaniche BONGIOANNI S.p.A. Dispositif de fixation d'une membrane en élastomère sur une matrice supérieure utilisée pour la fabrication d'articles en céramique
EP0391547A1 (fr) * 1989-03-13 1990-10-10 Ngk Insulators, Ltd. Procédé pour la fabrication des pièces céramiques
US5139718A (en) * 1989-03-13 1992-08-18 Ngk Insulators, Ltd. Method of manufacturing products of ceramics
EP0637489A1 (fr) * 1993-08-03 1995-02-08 Erich Netzsch GmbH & Co. Holding KG Outillage pour le pressage isostatique d'objets creux à parois fortement inclinées en matériau céramique

Also Published As

Publication number Publication date
EP0121128A3 (fr) 1986-02-05
US4518341A (en) 1985-05-21
DE3332277A1 (de) 1984-10-04

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: SUFFA, HILMAR