发明名称 |
METHOD FOR MAKING INVESTMENT PATTERNS |
摘要 |
machine engineering, namely casting with use of investment patterns. SUBSTANCE: pattern is made of powered mixture of pattern composition with fraction size (0.1-1.6)mm and sodium tetraborate with fraction size (0.1-0.63)mm. Relation of components of mixture by volume: pattern composition -(75-80)%; sodium tetraborate -(20-25)%. Method comprises steps of metering pattern material to press mold in quantity providing manufacture of patterns with open porosity (3-10)%; without preliminarily heating pressing pattern material due to coinciding parting surfaces of press mold; at pressing sintering powdered pattern material practically without phase deformation processes at providing open capillary porosity which compensates thermal expansion of pattern at melting- out it from ceramic envelope. EFFECT: enhanced dimensional and geometrical accuracy of patterns and castings. 1 tbl
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申请公布号 |
RU2188738(C2) |
申请公布日期 |
2002.09.10 |
申请号 |
RU20000123708 |
申请日期 |
2000.09.14 |
申请人 |
IJA I METALLURGII DAL'NEVOSTOCHNOGO OTDELENIJA RAN;G UCHREZHDENIE I MASH |
发明人 |
SAPCHENKO I.G.;ZHILIN S.G. |
分类号 |
B22C7/02;(IPC1-7):B22C7/02 |
主分类号 |
B22C7/02 |
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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