发明名称 |
Foundry core, especially for forming cavities in thin-walled cast products, e.g. oil channels in crankcases, comprises a glass tube with weakened wall regions |
摘要 |
Foundry core comprises glass tube with a wall having weak regions. Preferred Features: The glass tube consists of quartz glass and the weak regions are produced by local heat treatment or by fusion welding or adhesive bonding of further glass elements to the glass tube.
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申请公布号 |
DE19902442(A1) |
申请公布日期 |
2000.08.10 |
申请号 |
DE19991002442 |
申请日期 |
1999.01.22 |
申请人 |
DAIMLERCHRYSLER AG |
发明人 |
BOTSCH, SIEGFRIED |
分类号 |
B22C9/10;(IPC1-7):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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