发明名称 |
A method of preparing a permanent air-permeable mold. |
摘要 |
<p>A method of preparing a durable air-permeable mold having dimensional accuracy and without cracks due to the segregation of the ingredients of the aggregate and without a surface irregularity, which comprises compounding 100 parts by weight of an aggregate obtained by compounding metal powders with metal oxide powders in a weight ratio of 5:95 to 30:70, the metal of said metal oxide powders being the same as that of the metal powders, 80% or more of said metal powders and said metal oxide powders having grain sizes of 300 mu m or less, with 10 to 35 by weight of an auxiliary hardening material that is softened and melted during the sintering process, and 10 to 25 by weight of a binder that contains an evaporable component, mixing them to form a slurry mixture, pouring it in a pattern mold to obtain a mold, drying the thus-obtained mold, and sintering the dried mold in an oxidative atmosphere at a temperature of 600 to 1200 DEG C. <IMAGE></p> |
申请公布号 |
EP0647491(A2) |
申请公布日期 |
1995.04.12 |
申请号 |
EP19940105611 |
申请日期 |
1994.04.12 |
申请人 |
SINTOKOGIO LTD. |
发明人 |
FUMA, TOYOJI;NISHIKAWA, KAZUYUKI;HAYASHI, YOJIRO;MAKIGUCHI, NAOSHI;INAGAKI, TAKEHIRO;NISHIOKA, KOJI;KAWAGUCHI, MITUO |
分类号 |
B22C9/02;B22C9/06;B22F3/22;B22F5/00;B28B1/26;B29C33/38;(IPC1-7):B22F5/00 |
主分类号 |
B22C9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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