EP0090118A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ceramic mould and method of producing same
Assignee: Crucible Materials Corp
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Filing: 1982-11-30
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Granted: —
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Expires: 2002-11-30
Abstract
Abstract A ceramic mould (10) for use in the production of powder metallurgy articles (22); the mould (10) has a ceramic body (12) with a mould cavity (14) therein conforming substantially to the configuration of the article (22) to be produced. The mould cavity (14) is adapted to be filled with powdered metal (20) which is then compacted to form the article (22). The improvement of the invention is the mould cavity (14) having a continuous metal coating (18) covering the entire surface thereof so that the powdered metal (20) prior to and during compaction does not come into contact with and be contaminated by the ceramic of the mould body (12).
Inventors
- 👤 Vijay Kumar Chandhok
- 👤 Karl Simms Brosius
- 👤 William Lee Mccollough
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 17:24
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/1208; B22F3/1258; B22F3/1275; B22F3/1216; B22F3/1241; B22F3/1283
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A mould (10) for use in the production of a powder metallurgy article (22), comprising a ceramic mould body (12) having a mould cavity (14) therein with a surface conforming substantially to the configuration of a said article to be produced and adapted for filling with a powdered metal (20) for compaction to form said article, characterised in that said mould cavity (14) has a continuous metal coating (18) covering said surface.
Claim 2
Dependent Claim
72 words
A mould (10) for use in the production of a powder metallurgy article (22), comprising a ceramic mould body (12) having a mould cavity (14) therein with a surface conforming substantially to the configuration of a said article to be produced and adapted for filling with a powdered metal (20) for compaction to form said article, characterised in that said mould cavity (14) has a continuous metal coating (18) covering said surface.
Claim 3
Dependent Claim
15 words
A mould according to claim 1, characterised in that said metal coating (18) is nickel.
Claim 4
Dependent Claim
25 words
A mould according to claim 1 or 2, characterised in that said ceramic mould body (12) is segmented into at least two selectively separable parts.
Claim 5
Dependent Claim
34 words
A mould according to claim 1, 2 or 3, characterised in that said mould (10) has a ceramic core within said mould cavity (14) and said ceramic core has a continuous metal coating thereon.
Claim 6
Independent Claim
76 words
A method of producing a mould (10) for use in the production of a powder metallurgy article (22), said method comprising producing a ceramic mould body (12) having a mould cavity (14) therein with a surface conforming substantially to the configuration of said article (22) and adapted for filling with powdered metal (20) for compaction to form said article (22), charactersied in that the methcd further comprises applying a continuous metal coating (18) onto said surface.
Claim 7
Independent Claim
76 words
A method of producing a mould (10) for use in the production of a powder metallurgy article (22), said method comprising producing a ceramic mould body (12) having a mould cavity (14) therein with a surface conforming substantially to the configuration of said article (22) and adapted for filling with powdered metal (20) for compaction to form said article (22), charactersied in that the methcd further comprises applying a continuous metal coating (18) onto said surface.
Claim 8
Dependent Claim
35 words
A method according to claim 5, characterised in that said ceramic mould body (12) is produced by forming at least two separable segments (10) and uniting said segments to result in said mould cavity (14).
Claim 9
Dependent Claim
55 words
A method according to claim 6, characterised in that said segments (10) each have a surface portion adapted to form said mould cavity (14) when said segments (10) are united and a continuous metal coating (18) is applied to said surface portion prior to uniting said segments (10) to result in said mould cavity (14).
Claim 10
Dependent Claim
18 words
A method according to claim 5, 6 or 7, characterised in that said metal coating (18) comprises nickel.
Claim 11
Independent Claim
25 words
A method according to any one of the preceding claims 5 to 8, characterised in that said coating (18) is applied by chemical vapour deposition.
Claim 12
Independent Claim
31 words
A method according to any one of the preceding claims 5 to 9, characterised in that a ceramic core having a continuous metal coating thereon is provided within said mould cavity.
References Cited (Backward Citations)
DE1446181B1
Cited
DE1908796A1
Cited
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