发明授权
- 专利标题: Pressure casting method through pressurizing pin advancement speed control
- 专利标题(中): 压铸法通过加压销提升速度控制
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申请号: US516363申请日: 1995-08-17
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公开(公告)号: US5671797A公开(公告)日: 1997-09-30
- 发明人: Mikiya Nozaki , Mitsuhiro Karaki , Mitsuru Inui , Takehito Futamura , Akira Saitoh
- 申请人: Mikiya Nozaki , Mitsuhiro Karaki , Mitsuru Inui , Takehito Futamura , Akira Saitoh
- 申请人地址: JPX Toyota JPX Tokyo
- 专利权人: Toyota Jidosha Kabushiki Kaisha,Gifu Seiki Kogyo Kabushiki Kaisha
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha,Gifu Seiki Kogyo Kabushiki Kaisha
- 当前专利权人地址: JPX Toyota JPX Tokyo
- 优先权: JPX6-194208 19940818; JPX7-144857 19950612
- 主分类号: B22D18/02
- IPC分类号: B22D18/02 ; B22D17/20 ; B22D17/22 ; B22D17/32 ; B22D27/11 ; B29C45/56 ; B29C45/76 ; B29C45/82 ; B22D47/00
摘要:
A pressure casting method is disclosed, which permits sufficient pressurizing effect to be obtained for the entire molten metal by varying the speed of advancement of a pressurizing pin according to the state of solidification of the molten metal during pressurizing. In pressure casting using a pressure casting apparatus, while charged molten metal is solidified, it is pressurized by causing advancement of the pressurizing pin into a cavity of the die. During this time, the reaction force received by the pressurizing pin from the molten metal is measured by a pressure sensor, and the speed of advancement of the pressurizing pin is varied through control of the opening degree of a flow control valve according to the measured reaction force. While the reaction force during the progress of solidification of molten metal is high, the flow control valve is controlled to a high opening degree to provide for a high speed of advancement of the pressurizing pin so as to apply a high pressurizing force. On the other hand, while the reaction force is low so that there is a delay in the solidification of molten metal, the speed of advancement is reduced so that no pressurizing force is applied until completion of solidification of molten metal. The pressurizing pin is advanced while its advancement speed is controlled in the above way, and pressurizing over the entire stroke is completed.