FR2004171A1 - Moulding ceramic objects using electrically - charged moulds - Google Patents
Moulding ceramic objects using electrically - charged mouldsInfo
- 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- Withdrawn
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%.
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)
| 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. |
| 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 |
| WO2008054596A3 (en) * | 2006-09-29 | 2008-08-14 | Johnson & Johnson Vision Care | Excess polymer ring removal during ophthalmic lens manufacture |
-
1969
- 1969-03-18 FR FR6907720A patent/FR2004171A1/en not_active Withdrawn
- 1969-03-18 JP JP2034969A patent/JPS4833248B1/ja active Pending
Cited By (6)
| 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. |
| 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 |
| 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 |