EP0919345A1 - Verfahren zum Einrichten einer mit auswechselbarer Formfläche Form für die Herstellung von Gegenständen aus Ton - Google Patents

Verfahren zum Einrichten einer mit auswechselbarer Formfläche Form für die Herstellung von Gegenständen aus Ton Download PDF

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Publication number
EP0919345A1
EP0919345A1 EP97120580A EP97120580A EP0919345A1 EP 0919345 A1 EP0919345 A1 EP 0919345A1 EP 97120580 A EP97120580 A EP 97120580A EP 97120580 A EP97120580 A EP 97120580A EP 0919345 A1 EP0919345 A1 EP 0919345A1
Authority
EP
European Patent Office
Prior art keywords
mould
negative
preparing
replaceable
sheet
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.)
Withdrawn
Application number
EP97120580A
Other languages
English (en)
French (fr)
Inventor
Giorgio Bertola
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.)
FOMB Officine Meccaniche Bongioanni Srl
Original Assignee
FOMB Officine Meccaniche Bongioanni Srl
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 FOMB Officine Meccaniche Bongioanni Srl filed Critical FOMB Officine Meccaniche Bongioanni Srl
Priority to EP97120580A priority Critical patent/EP0919345A1/de
Publication of EP0919345A1 publication Critical patent/EP0919345A1/de
Withdrawn legal-status Critical Current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
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/366—Replaceable lining plates for press mould
    • 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
    • B28B7/346—Manufacture of moulds
    • 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
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article

Definitions

  • the present invention refers to a process for preparing moulds with a replaceable moulding surface for manufacturing clay articles.
  • Such moulds are made of steel, and the steel has to be subjected to a special heat treatment in order to maintain for a long time a surface hard and strong enough for the intended uses.
  • a negative of metal sheet or other material capable of being drawn is formed in the mould, such negative is secured to the mould by proper means, and is subsequentely spray coated with a mixture containing from 85% to 90% of tungsten carbide and from 15% to 10% of cobalt carbide.
  • This coating imparts to the material capable of being drawn and reproducing the shape of the article, very good properties of hardness together with very good properties of wear resistance in the moulding process.
  • the negative to be coated is formed on replaceable blocks or inserts inside the mould, secured to the mould by proper means, and such a negative is then sprayed with the above mentioned tungsten carbide and cobalt carbide mixture.
  • the mixture for coating the sheet material capable of being drawn and constituting the negative is formed by 88% of tungsten carbide and 12% of cobalt carbide.
  • numeral 1 indicates a mould, 3 a sheet of a resilient material adapted to be drawn that has been formed with the profile of the clay article to be manufactured, 5 the means for securing such sheet 3 to the upper mould 1.
  • the sheet After the sheet 3 has been fsstened to the mould 1, the sheet is sprayed to form a coating with a mixture 7 comprising from 85% to 90% of tungsten carbide and from 15% to 10% of cobalt carbide.
  • a coating imparts to the sheet 3 very good properties of hardness and wear resistance for the molding of the clay article (not shown in the drawings).
  • the sheet 3 Although protected by the coating 7, worns out and can be replaced with a new sheet in the mould 1.
  • Fig. 2 illustrates a second embodiment of the invention, that is similar to that of Fig. 1, but for the sheet 3 being applied to a support 9 that in turn can be fitted in the mould as shown in Fig. 1.
  • the replaceable portion includes the support 9 to which the sheet 3, coated with the mixture of tungsten carbide and cobalt carbide in the assigned percentages, has been applied.
  • An optimum mixture comprises 88% of tungsten carbide and 12% of cobalt carbide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
EP97120580A 1997-11-25 1997-11-25 Verfahren zum Einrichten einer mit auswechselbarer Formfläche Form für die Herstellung von Gegenständen aus Ton Withdrawn EP0919345A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97120580A EP0919345A1 (de) 1997-11-25 1997-11-25 Verfahren zum Einrichten einer mit auswechselbarer Formfläche Form für die Herstellung von Gegenständen aus Ton

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97120580A EP0919345A1 (de) 1997-11-25 1997-11-25 Verfahren zum Einrichten einer mit auswechselbarer Formfläche Form für die Herstellung von Gegenständen aus Ton

Publications (1)

Publication Number Publication Date
EP0919345A1 true EP0919345A1 (de) 1999-06-02

Family

ID=8227673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120580A Withdrawn EP0919345A1 (de) 1997-11-25 1997-11-25 Verfahren zum Einrichten einer mit auswechselbarer Formfläche Form für die Herstellung von Gegenständen aus Ton

Country Status (1)

Country Link
EP (1) EP0919345A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073025A2 (en) * 1999-05-28 2000-12-07 Richard Michael Davies Moulds for cementitious material
NL2005214C2 (nl) * 2010-08-11 2012-02-14 Beheermij De Boer Nijmegen Bv Een van een afdichtinrichting voorzien vormbakdeel, alsmede een dergelijke afdichtinrichting en werkwijze voor de toepassing daarvan.
EP3249071A1 (de) * 2016-03-21 2017-11-29 Zaklady Magnezytowe "ROPCZYCE" Formeinsatz mit erhöhter lebensdauer zum pressformen von stampfungen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB987311A (en) * 1962-01-27 1965-03-24 Wehinger Robert Mould wall or partition for a plaster moulding machine
DE2010843A1 (en) * 1967-08-10 1971-09-30 Kirner, KIaOs, 7312 Kirchheim Ceramic products mould
FR2145066A5 (en) * 1971-07-08 1973-02-16 Sfec Ceramic coated plaster mould - has longer life
EP0037803A1 (de) * 1980-04-01 1981-10-14 Zanda Ab Für die Herstellung von Dachziegeln aus Beton vorgesehene Form
SU1380963A1 (ru) * 1986-04-14 1988-03-15 Центральное Конструкторское Бюро "Строммашина" Производственного Объединения "Красный Октябрь" Пресс-форма пресса полусухого прессовани
DE9111427U1 (de) * 1991-09-13 1991-12-05 Rieter-Werke Händle KG, 7750 Konstanz Preßform für eine Dachziegelpresse
US5445514A (en) * 1993-09-22 1995-08-29 Heitz; Lance A. Refractory material coated metal surfaces adapted for continuous molding of concrete blocks

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB987311A (en) * 1962-01-27 1965-03-24 Wehinger Robert Mould wall or partition for a plaster moulding machine
DE2010843A1 (en) * 1967-08-10 1971-09-30 Kirner, KIaOs, 7312 Kirchheim Ceramic products mould
FR2145066A5 (en) * 1971-07-08 1973-02-16 Sfec Ceramic coated plaster mould - has longer life
EP0037803A1 (de) * 1980-04-01 1981-10-14 Zanda Ab Für die Herstellung von Dachziegeln aus Beton vorgesehene Form
SU1380963A1 (ru) * 1986-04-14 1988-03-15 Центральное Конструкторское Бюро "Строммашина" Производственного Объединения "Красный Октябрь" Пресс-форма пресса полусухого прессовани
DE9111427U1 (de) * 1991-09-13 1991-12-05 Rieter-Werke Händle KG, 7750 Konstanz Preßform für eine Dachziegelpresse
US5445514A (en) * 1993-09-22 1995-08-29 Heitz; Lance A. Refractory material coated metal surfaces adapted for continuous molding of concrete blocks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 8839, Derwent World Patents Index; Class P64, AN 88-276907, XP002062943 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073025A2 (en) * 1999-05-28 2000-12-07 Richard Michael Davies Moulds for cementitious material
WO2000073025A3 (en) * 1999-05-28 2001-02-01 Richard Michael Davies Moulds for cementitious material
NL2005214C2 (nl) * 2010-08-11 2012-02-14 Beheermij De Boer Nijmegen Bv Een van een afdichtinrichting voorzien vormbakdeel, alsmede een dergelijke afdichtinrichting en werkwijze voor de toepassing daarvan.
EP2418057A1 (de) * 2010-08-11 2012-02-15 Beheermaatschappij De Boer Nijmegen B.V. Formbehälterteil mit einer Dichtvorrichtung und solch eine Dichtvorrichtung sowie Anwendungsverfahren dafür
EP3249071A1 (de) * 2016-03-21 2017-11-29 Zaklady Magnezytowe "ROPCZYCE" Formeinsatz mit erhöhter lebensdauer zum pressformen von stampfungen

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