发明名称 |
VACUUM CASTING DEVICE. |
摘要 |
<p>A vacuum casting device wherein gate mechanisms (12 and 10) are closed and the interior of cavity (6) is vacuumized by a vacuum pump in a state where the sides of the gate mechanisms (12 and 10) opposite to the cavity are filled up with molten metal. A ring-shaped groove having a V-shaped cross section on the side opposite to the cavity reaches sealed portion of the gate mechanisms (12 and 10) in a state where a molten metal path (8) is closed. With this arrangement, the molten metal is led to the sealed portion from the ring-shaped groove (10e) and intrudes into minute gaps formed in the sealed portion. Then, the molten metal is solidified in the ring-shaped groove (10e) and the gaps formed in the sealed portion. Because of this, the thus solidified metal piece has a ring shape having a predetermined thickness and can be easily peeled off from the gate mechanisms (12 and 10) during mold release. <IMAGE></p> |
申请公布号 |
EP0572677(A1) |
申请公布日期 |
1993.12.08 |
申请号 |
EP19930900349 |
申请日期 |
1992.12.16 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
OTA, ATSUSHI;UOZUMI, MINORU;ONISHI, HIROKAZU |
分类号 |
B22D18/02;B22D17/12;B22D17/22;B22D18/04;B22D18/06;(IPC1-7):B22D18/04 |
主分类号 |
B22D18/02 |
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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