发明授权
- 专利标题： Removing lost foam pattern coating residue from a casting
- 专利标题（中）： 从铸件中去除丢失的泡沫图案涂层残留物
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申请号： US09335851申请日： 1999-06-14
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公开(公告)号： US06901989B1公开(公告)日： 2005-06-07
- 发明人: Nicholas Edward Sargent , June-Sang Siak , Mei Cai , Thomas C. Pederson , Sheila Farrokhalaee Kia
- 申请人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai , Thomas C. Pederson , Sheila Farrokhalaee Kia
- 申请人地址： US MI Detroit
- 专利权人： General Motors Corporation
- 当前专利权人： General Motors Corporation
- 当前专利权人地址： US MI Detroit
- 代理商 Kathryn A. Marra
- 主分类号： B22C3/00
- IPC分类号： B22C3/00 ; B22C7/02 ; B22D29/00 ; B22D31/00 ; F02F7/00
摘要：
In the lost foam casting of aluminum, coating a fugitive pattern with a refractory coating containing a thermally stable, water-insoluble, acid-gasifiable (e.g. CaCO3) compound, and contacting the casting, with the coating thereon, with an acid to dissociate and gasify the compound and rupture the coating. Preferably, any thermal degradation products from the pattern residing in the coating are neutralized to promote wetting of the coating.
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