发明名称 |
Sand core with ventilation channels |
摘要 |
The cores are formed of compressed sand. A structure of foamed material which decomposes at a temp. below the calcination temp. of the core sand is placed at the location where a channel is to be formed. The core is then calcined. Spec. the foamed structure consists of polystyrene or polyurethane. |
申请公布号 |
DE1938526(A1) |
申请公布日期 |
1971.02.18 |
申请号 |
DE19691938526 |
申请日期 |
1969.07.29 |
申请人 |
IDEAL-STANDARD GMBH |
发明人 |
MUGUET,JEAN;ROBERT JOUDIOUX,FRANCE;DREVET,JEAN-MARIE;GRATTON,JEAN-CLAUDE |
分类号 |
B22C9/10 |
主分类号 |
B22C9/10 |
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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