Pattern for casting mold curable by high-frequency induction heating |
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| 申请号 | JP3310184 | 申请日 | 1984-02-23 | 公开(公告)号 | JPS60177928A | 公开(公告)日 | 1985-09-11 |
| 申请人 | Hitachi Chem Co Ltd; | 发明人 | OOWADA YOSHIROU; SAKAMOTO SHIZUO; MUTAGUCHI GANDOU; | ||||
| 摘要 | PURPOSE:To provided the titled pattern which speeds up curing of a casting mold by using foamed gypsum in the pattern part corresponding to the part of the casting mold where curing is not enough thereby providing air permeability to the pattern. CONSTITUTION:A binder such as furan is added to the sand of a casting mold and the sand is cured by heating for which evaporation of the moisture in the binder is necessary. Foamed gypsum is made into a piece and such piece is fitted into the pattern part where the venting is poor to improve air permeability and to speed up curing. Since the gypsum has the coefft. of dielectric loss approximately equal to the coefft. of dielectric loss of wood, there is no possibility of overheating by high-frequency heating. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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