发明名称 |
METHODS FOR SAND CORE GAS EVACUATION AND RELATED SYSTEMS AND APPARATUS |
摘要 |
Methods, systems, and apparatus for reduction of gas pressure within a core, such as a sand casting core package, during a casting process in order to reduce bubble defects. Some embodiments may comprise a mold configured to receive a molten metal to create a metal casting, such as an engine block casting. The mold may comprise a mold core configured to create a cavity within the metal casting. The system may further comprise a filling device configured for delivering a molten metal into the mold for creating the metal casting. The mold core may comprise a material that is permeable to certain gases known to often result in bubble defects. The system may further comprise a vacuum configured to be coupled with the mold to reduce gas pressure within a permeable portion of the mold in order to reduce the incidence of bubble defects within the casting. |
申请公布号 |
CA2839095(A1) |
申请公布日期 |
2014.07.22 |
申请号 |
CA20142839095 |
申请日期 |
2014.01.14 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS LLC |
发明人 |
COGAN, CHRISTOPHER D.;SINGER, JAMES T.;FITCH, STEPHEN M.;MEYER, MAURICE G.;GOETTSCH, DAVID D. |
分类号 |
B22D27/15;B22D18/06 |
主分类号 |
B22D27/15 |
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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