EP0121929A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Permeable mold
Assignee: Sintokogio Ltd
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Filing: 1984-04-09
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Granted: —
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Expires: 2004-04-09
Abstract
Abstract A durable and permeable mold for liquid, slurry, soft, sheet or lump materials is characterized by a composite sintered body (1) comprising aggregates of ferrous or non-ferrous metallic grains and ceramic grains, to which a binder contained in evaporating or consumable substance is added. The body (1) has a close hardened surface region or layer (2) in which metallic oxides are scattered. The hardened layer (2) has fine air vents (22) in its thickness. The whole body (1) of the mold has a porosity of 5 to 60% and compression strength of more than 100 kg/cm<2>.
Inventors
- 👤 Akira Yanagisawa
- 👤 Hiroyuki Noguchi
- 👤 Takeo Nakagawa
- 👤 Takehiro Inagaki
- 👤 Yoshikazu Dai-2 Kyowa-Sou Hayashi
- 👤 Masanobu Tsuchida
- 👤 Toyoji Fuma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:24
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/26; B28B1/261; B28B1/262; B22; B22C; B22C1/00; B22C9/00; B22C9/06; B22C9/061; B22F; B22F5/00; B22F5/007; B29; B29C; B29C33/00; B29C33/38; B29C33/3814; B29C51/00; B29C51/26; B29C51/30; B29C51/36; B29C51/365; C; C03; C03B; C03B19/00; C03B19/02; C03B9/00; C03B9/30; C03B9/34; C03B9/48
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
Permeable mold having a forming surface of predetermined shape, characterized by a composite sintered part comprising aggregates of metallic grains and ceramic grains, said composite sintered part having a close or dense hardened layer (2) or region in which metallic oxides are dispersed on an outer circumference including at least said forming surface (11), and said hardened layer (2) or region having fine vents (22) generated by passing of evaporating or consumable substances contained in a binder which is mixed in the aggregates, and the entire body (1) of the mold having porosity of 5 to 60% and compression strength of more than 100 kg/ cm 2 .
Claim 2
Dependent Claim
108 words
Permeable mold having a forming surface of predetermined shape, characterized by a composite sintered part comprising aggregates of metallic grains and ceramic grains, said composite sintered part having a close or dense hardened layer (2) or region in which metallic oxides are dispersed on an outer circumference including at least said forming surface (11), and said hardened layer (2) or region having fine vents (22) generated by passing of evaporating or consumable substances contained in a binder which is mixed in the aggregates, and the entire body (1) of the mold having porosity of 5 to 60% and compression strength of more than 100 kg/ cm 2 .
Claim 3
Dependent Claim
52 words
Mold as claimed in Claim 1, characterized in that the mixing weight ratio of the metallic grains, ceramic grains and evaporating or consuming substances is (1 to 5) : (1 to 5) : 1 in a slurry for forming the predetermined shape by passing through drying and heating in an oxidizing atmosphere.
Claim 4
Dependent Claim
26 words
Mold as claimed in claim 1, characterized in that reinforcing fibers (4) are provided in the composite sintered part including said hardened layer (2) or region.
Claim 5
Dependent Claim
67 words
Mold as claimed in Claim 3, characterized in that the mixing weight ratio of the metallic grains, ceramic grains and evaporating or consuming substances is (1 to 5) : (1 to 5) : 1, to which the reinforcing fibers are added in an amount of 1 to 20 vol% in the slurry for forming the predetermined shape by passing through drying and heating a oxidizing atmosphere. in
Claim 6
Dependent Claim
15 words
Mold as claimed in any preceding Claim, characterized in that the metallic grains are ferrous.
Claim 7
Dependent Claim
18 words
Mold as claimed in any of Claims 1 - 4, characterized in that the metallic grains are non-ferrous.
Claim 8
Dependent Claim
46 words
Mold as claimed in any preceding Claim, characterized in that the hardened layer (2) does not reach to the center of the composite sintered body (1) and a backing layer (3) comprising a non-sintered mixture is formed on the inner side of the hardened layer (2).
Claim 9
Dependent Claim
39 words
Mold as claimed in any of Claim 1 - 6, characterized in that the hardened layer (2) reaches to the center of the composite sintered body (1) and the entire body (1) of the mold comprises the hardened layer(2).
Claim 10
Dependent Claim
26 words
Mold as claimed in any preceding Claim, characterized in that the composite sintered body (1) is an absorption forming mold to be used under non-pressure conditions.
Claim 11
Dependent Claim
28 words
Mold as claimed any of Claims 1 - 8, characterized in that the composite sintered body (1) is an absorption forming mold to be used under low pressure.
Claim 12
Dependent Claim
31 words
Mold as claimed in any of Claims 1 - 8, characterized in that the composite sintered body (1) is an absorption forming mold to be used under pressure accompanying plastic flowing.
Claim 13
Dependent Claim
25 words
Mold as claimed in any of Claims 1 - 8, characterized in that the composite sintered body (1) is a vaccum forming mold for plastics.
Claim 14
Dependent Claim
25 words
Mold as claimed in any of claims 1 - 8, characterized in that the composite sintered body (1) is a blow forming mold for plastic.
Claim 15
Dependent Claim
26 words
Mold as claimed in any of Claims 1 - 8, characterized in that the composite sintered body (1) is a water absorption mold for slip casting.
References Cited (Backward Citations)
No citation records indexed.
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