EP1136214A2 - Moule pour la réalisation d'objects moulés en céramique - Google Patents

Moule pour la réalisation d'objects moulés en céramique Download PDF

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Publication number
EP1136214A2
EP1136214A2 EP01105875A EP01105875A EP1136214A2 EP 1136214 A2 EP1136214 A2 EP 1136214A2 EP 01105875 A EP01105875 A EP 01105875A EP 01105875 A EP01105875 A EP 01105875A EP 1136214 A2 EP1136214 A2 EP 1136214A2
Authority
EP
European Patent Office
Prior art keywords
sintered metal
press mold
mold according
pressing surface
porosity
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
EP01105875A
Other languages
German (de)
English (en)
Other versions
EP1136214A3 (fr
EP1136214B1 (fr
Inventor
Stephan Dr. Ing. Schmitt
Kh. G. Prof. Dr. Ing. Schmitt-Thomas
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.)
Erlus AG
Original Assignee
Erlus AG
Erlus Baustoffwerke AG
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 Erlus AG, Erlus Baustoffwerke AG filed Critical Erlus AG
Publication of EP1136214A2 publication Critical patent/EP1136214A2/fr
Publication of EP1136214A3 publication Critical patent/EP1136214A3/fr
Application granted granted Critical
Publication of EP1136214B1 publication Critical patent/EP1136214B1/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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/344—Moulds, cores, or mandrels of special material, e.g. destructible materials from absorbent or liquid- or gas-permeable materials, e.g. plaster moulds in general

Definitions

  • the invention relates to a mold for the production of Moldings made of ceramic material, especially bricks or roof tiles.
  • Molds of this type are widely known and in use. They also serve in the production of clay roof tiles for shaping and pressing out the raw material contained moisture, usually water. That in the course Water that escapes from the pressing process must pass through the parting line be removed from the mold or the shaping press surface is at least partially designed so that the water can flow through the mold.
  • plaster molds have prevailed, their press surfaces are made of plaster.
  • These plaster molds combine the ability that emerging from the ceramic material during the pressing process Take up water and pass it on with a good one Detachment behavior of the moldings from the pressing surface.
  • the main disadvantage of these plaster molds is that due to the material weakness inherent in the plaster subject to heavy wear and therefore only a small one Have standing time. To remedy this, are even molds for roof tiles made of chrome-nickel steel have been proposed where the water is above the parting line is released. This allows the service life of the Press molds increase significantly, but these are due to the more complex production much more expensive than plaster molds.
  • molds are also known, their shaping Surfaces consist of open-pored silicon carbide (SiC) (DE 197 44 862 A1) and the water through the mold can derive.
  • SiC silicon carbide
  • these molds are also expensive to manufacture and therefore expensive.
  • the object of the present invention is to provide a mold to propose the type described, which has a long service life results and in a simple process with a Predeterminable porosity can be produced.
  • the sintered metal not only has a supporting function in the mold, but is shaping and serves at the same time to remove the during the pressing process from the raw material escaping water through the shaping surface itself.
  • Sintered metal can be targeted with an open pore Porosity and permeability to liquids and Produce gases that can be precisely predetermined.
  • Binder used to shape and manufacture the above press molds made of ceramic material (DE 197 44 682 A1) are required and control of the porosity of the Impair molds are not required.
  • the Pressing surface can therefore be varied in the pressing process, e.g.
  • the areas are in the case of interlocking roof tiles which have a high flow rate of the raw material Pressing process is expected in the section of the bead or the cover fold, while in the area of the fold at Pressing process in the unit of time larger amounts of water emerge.
  • the corresponding is in an inventive Mold for the production of interlocking roof tiles the porosity of the sintered metal of the press surface.
  • the sintered metal mold is much easier and with produce less effort than the one described above Press mold made of SiC ceramic. Because the design can be done in one Sintering process at noticeably lower temperatures in the Compared to a ceramic fire and it can be done are less shrinkage than with ceramics expect.
  • Another advantage of using Sintered metal is that compared to gypsum and ceramic material has its own toughness and so there is less risk of breakage. This is especially true if sintered metals with targeted very high toughness and Breaking strength can be selected.
  • molds according to the invention achieve higher pressures and consequently in addition to a higher compression and that due to improved squeezing of the liquid achieve lower-water blanks.
  • a porosity value of at least 25% and for the permeability (flowability) in the range from 50 to 500 10 -7 m 2 can be regarded as useful.
  • the permeability of the press surface becomes essentially by the extent of one on the back of the mold applied negative pressure determined. But it can be a part also be influenced by the fact that by a corresponding Treatment the sintered metal is made hydrophilic.
  • the hydrophilic behavior should at least be beyond a certain depth starting from the pressing surface to thereby To be able to keep porosity finer and thus the surface of the ceramic body to be molded to appear smooth. Following this area can be done by increasing the Pore size, porosity and / or the permeability of the Sintered metal ensures increased portability his.
  • a lipophilic section Property of the sintered metal can be used to the permeability of the pressing surface in sections to control.
  • the hydrophilic or lipophilic character of Sintered metal surface can be organic or inorganic coatings can be achieved. Such coatings are known.
  • Bronze is preferred as the sintered metal, however is basically the production from others metallic powders, e.g. B. chrome-nickel steel conceivable.
  • the mold with facilities connect that in addition to the application by means of Compressed air or water for the purpose of detaching it appropriate medium from the back of the press surface convey through the sintered metal to the pores of the pressing surface thereby cleaning and from clogging particles of Flush ceramic material.
  • the part of the mold forming the press surface as a hollow body made of sintered metal and this Support hollow bodies with a supporting structure.
  • the sintered metal mold according to the invention can be in one piece or be made up of several individual parts. It is due to the easy workability of the sintered metal simple, even with a multi-part mold to avoid by the joints of the parts on the molding.

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)
  • Moulds, Cores, Or Mandrels (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP01105875A 2000-03-13 2001-03-09 Moule pour la réalisation d'objects moulés en céramique Expired - Lifetime EP1136214B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10012196 2000-03-13
DE10012196A DE10012196A1 (de) 2000-03-13 2000-03-13 Pressform zur Herstellung von Formlingen aus keramischem Material

Publications (3)

Publication Number Publication Date
EP1136214A2 true EP1136214A2 (fr) 2001-09-26
EP1136214A3 EP1136214A3 (fr) 2003-05-07
EP1136214B1 EP1136214B1 (fr) 2006-04-12

Family

ID=7634554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105875A Expired - Lifetime EP1136214B1 (fr) 2000-03-13 2001-03-09 Moule pour la réalisation d'objects moulés en céramique

Country Status (3)

Country Link
EP (1) EP1136214B1 (fr)
AT (1) ATE322965T1 (fr)
DE (2) DE10012196A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2901783A1 (fr) * 2006-06-06 2007-12-07 Lifco Ind Sarl Moule, en particulier moule de verrerie, et procede de fabrication d'un tel moule
EP2532633A1 (fr) 2011-06-07 2012-12-12 Redco S.A. Moule de pressage humide pour tuile en argile et procédé de fabrication d'un moule pour la fabrication de tuiles en argile par pressage humide

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007909A1 (de) * 2005-02-08 2006-08-10 Rennebeck, Klaus, Dr. Vorrichtung zur Herstellung von Formteilen aus Keramik
AT518323B1 (de) * 2016-02-29 2018-03-15 Wienerberger Ag Pressform für Dachziegel
DE102020004788A1 (de) 2020-07-24 2022-01-27 Hochschule Mittweida (Fh) Form zum Pressen von Formlingen zur Herstellung künstlicher Steine aus keramischen Material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864674C (de) * 1951-11-22 1953-01-26 Johannes Dr Knappstein Pressform
DE1808391A1 (de) * 1968-11-12 1970-05-27 Dr Guenther Will Formmassen und daraus hergestellte Press- und Druckformen zur Abformung von Ton-,Keramik- und Porzellanmassen
US4531705A (en) * 1983-04-22 1985-07-30 Sinto Kogio, Ltd. Composite and durable forming model with permeability
EP0505296A1 (fr) * 1991-03-21 1992-09-23 L'industrielle Regionale Du Batiment Procédé de réalisation d'articles obtenus à partir d'un matériau moulable sous forme de pâte humide, et moule de pressage pour la mise en oeuvre de ce procédé
DE19857187A1 (de) * 1998-12-11 2000-06-15 Willi Roth Abfallfreie oder abfallarme Herstellung von Formen zur spanlosen Herstellung von flüssigkeitshaltigen auszuformenden Teilen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864674C (de) * 1951-11-22 1953-01-26 Johannes Dr Knappstein Pressform
DE1808391A1 (de) * 1968-11-12 1970-05-27 Dr Guenther Will Formmassen und daraus hergestellte Press- und Druckformen zur Abformung von Ton-,Keramik- und Porzellanmassen
US4531705A (en) * 1983-04-22 1985-07-30 Sinto Kogio, Ltd. Composite and durable forming model with permeability
EP0505296A1 (fr) * 1991-03-21 1992-09-23 L'industrielle Regionale Du Batiment Procédé de réalisation d'articles obtenus à partir d'un matériau moulable sous forme de pâte humide, et moule de pressage pour la mise en oeuvre de ce procédé
DE19857187A1 (de) * 1998-12-11 2000-06-15 Willi Roth Abfallfreie oder abfallarme Herstellung von Formen zur spanlosen Herstellung von flüssigkeitshaltigen auszuformenden Teilen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2901783A1 (fr) * 2006-06-06 2007-12-07 Lifco Ind Sarl Moule, en particulier moule de verrerie, et procede de fabrication d'un tel moule
EP2532633A1 (fr) 2011-06-07 2012-12-12 Redco S.A. Moule de pressage humide pour tuile en argile et procédé de fabrication d'un moule pour la fabrication de tuiles en argile par pressage humide

Also Published As

Publication number Publication date
DE10012196A1 (de) 2001-09-20
ATE322965T1 (de) 2006-04-15
DE50109472D1 (de) 2006-05-24
EP1136214A3 (fr) 2003-05-07
EP1136214B1 (fr) 2006-04-12

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