Method for molding sand core section |
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| 申请号 | JP21615781 | 申请日 | 1981-12-28 | 公开(公告)号 | JPS57137138A | 公开(公告)日 | 1982-08-24 |
| 申请人 | Caterpillar Tractor Co; | 发明人 | CHIYAARUZU EDOWAADO GURAUEI; GUREN AAMUSUTORONGU BOORU; DONARUDO JIEEN ZUUKU; | ||||
| 摘要 | Apparatus includes a rigid mold body and an expandable bladder associated therewith. The bladder is inflatable and expandable to form and press sand core material between itself and the mold body while exerting uniform compressive force over the total surface area of the core material thereby forming a portion of a hollow core of precise external dimension and uniform overall strength. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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