发明名称 |
METHOD FOR EASY REMOVAL OF SAND CORES FROM CASTINGS |
摘要 |
Sand cores are removed from metal or plastic coatings by exposing the cores to a humid atmosphere for a sufficient time to weaken the binder of the sand cores. The sand is then shaken from the casting. Metal or plastic castings with hollow passages are produced by forming a casting around the sand core bound with a suitable binder followed by exposing the casting and sand core to a humid atmosphere and then shaking the sand from the casting.
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申请公布号 |
CA2025826(C) |
申请公布日期 |
1997.08.05 |
申请号 |
CA19902025826 |
申请日期 |
1990.09.20 |
申请人 |
BORDEN CHEMICAL, INC. |
发明人 |
JOHNSON, CALVIN K.;WISE, BRUCE E. |
分类号 |
B22D29/00;B29C33/44;B29C33/54;(IPC1-7):B22D29/00;B22D29/02 |
主分类号 |
B22D29/00 |
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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