发明名称 Process and apparatus for packing granular foundry materials
摘要 In a closed system a shock pressure wave of a burning gas is used for packing granular mold material loosely distributed around a model. Before the shock pressure is produced, the pore volume of the upper layer of the granular material exposed to the pressure is reduced. Through the pore volume reduction, the active surface of the granular material is increased, so that the gas pressure acts on an increased working surface and, consequently, greater mold hardness is achieved.
申请公布号 US4505316(A) 申请公布日期 1985.03.19
申请号 US19820399830 申请日期 1982.07.19
申请人 GEORGE FISCHER LTD. 发明人 TANNER, HANS
分类号 B22C15/24;B22C15/00;(IPC1-7):B22C15/00 主分类号 B22C15/24
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