FR2004171A1 - Moulding ceramic objects using electrically - charged moulds - Google Patents

Moulding ceramic objects using electrically - charged moulds

Info

Publication number
FR2004171A1
FR2004171A1 FR6907720A FR6907720A FR2004171A1 FR 2004171 A1 FR2004171 A1 FR 2004171A1 FR 6907720 A FR6907720 A FR 6907720A FR 6907720 A FR6907720 A FR 6907720A FR 2004171 A1 FR2004171 A1 FR 2004171A1
Authority
FR
France
Prior art keywords
mould
slip
ceramic
conducting
positive electrode
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Withdrawn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
FR6907720A
Other languages
French (fr)
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.)
GLASBOCK PRODUCTS Inc
Original Assignee
GLASBOCK PRODUCTS Inc
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 GLASBOCK PRODUCTS Inc filed Critical GLASBOCK PRODUCTS Inc
Publication of FR2004171A1 publication Critical patent/FR2004171A1/en
Withdrawn legal-status Critical Current

Links

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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/269—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor by electrophoresis
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/12—Electroforming by electrophoresis
    • C25D1/14—Electroforming by electrophoresis of inorganic material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molecular Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

Ceramic objects may be moulded effectively and economically by casting into a mould formed of Al, Cu or graphite or made of some non-conductive material such as wax or synthetic resin coated with a conducting material. The ceramic slip may be constituted of 50-91% by weight of particles of 0.015-4.76mm diameter of SiO2, Al2O3, Cr2O3 and other non-metallic compounds of such sort dispersed in 50-9% weakly conducting polarised organic liquids and water. A potential of 10-800 volts is applied across the slip using the metal conducting mould as negative electrode and a conical Al rod, coated with a release agent and inserted in the centre of the mould cavity, as positive electrode. The passage of current through the slip causes the ceramic compound to flow to the mould walls concentrating the liquid agent near the positive electrode. If the mould has a simple contour consisting of straight lines and curves, it may be withdrawn readily from the mould. The moulded object has a shrinkage of about 0.5%.
FR6907720A 1968-03-18 1969-03-18 Moulding ceramic objects using electrically - charged moulds Withdrawn FR2004171A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71405068A 1968-03-18 1968-03-18

Publications (1)

Publication Number Publication Date
FR2004171A1 true FR2004171A1 (en) 1969-11-21

Family

ID=24868584

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6907720A Withdrawn FR2004171A1 (en) 1968-03-18 1969-03-18 Moulding ceramic objects using electrically - charged moulds

Country Status (2)

Country Link
JP (1) JPS4833248B1 (en)
FR (1) FR2004171A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197654A1 (en) * 1972-09-07 1974-03-29 Lazar Claire Electrophoretic draining of ceramic clay slip - deposits dense, robust articles which can be freely handled
FR2532955A1 (en) * 1982-09-10 1984-03-16 Norton Co Electrophoretic moulding process.
EP0220159A2 (en) * 1985-10-18 1987-04-29 Andromaque S.A. Process for the impression or coating of ceramics at their electroforming, resulting in decorated or technical products by singlefiring
WO2008042277A1 (en) * 2006-09-29 2008-04-10 Johnson & Johnson Vision Care, Inc. Electrostatic charge during ophthalmic lens manufacture
WO2008054596A2 (en) * 2006-09-29 2008-05-08 Johnson & Johnson Vision Care, Inc. Excess polymer ring removal during ophthalmic lens manufacture

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197654A1 (en) * 1972-09-07 1974-03-29 Lazar Claire Electrophoretic draining of ceramic clay slip - deposits dense, robust articles which can be freely handled
FR2532955A1 (en) * 1982-09-10 1984-03-16 Norton Co Electrophoretic moulding process.
EP0220159A2 (en) * 1985-10-18 1987-04-29 Andromaque S.A. Process for the impression or coating of ceramics at their electroforming, resulting in decorated or technical products by singlefiring
EP0220159A3 (en) * 1985-10-18 1988-12-14 Andromaque S.A. Process for the impression or coating of ceramics at their electroforming, resulting in decorated or technical products by singlefiring
WO2008042277A1 (en) * 2006-09-29 2008-04-10 Johnson & Johnson Vision Care, Inc. Electrostatic charge during ophthalmic lens manufacture
WO2008054596A2 (en) * 2006-09-29 2008-05-08 Johnson & Johnson Vision Care, Inc. Excess polymer ring removal during ophthalmic lens manufacture
WO2008054596A3 (en) * 2006-09-29 2008-08-14 Johnson & Johnson Vision Care Excess polymer ring removal during ophthalmic lens manufacture
US7875217B2 (en) 2006-09-29 2011-01-25 Johnson & Johnson Vision Care, Inc. Excess polymer ring removal during ophthalmic lens manufacture

Also Published As

Publication number Publication date
JPS4833248B1 (en) 1973-10-12

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Legal Events

Date Code Title Description
ST Notification of lapse