发明名称 |
Casting control system of die cast machine |
摘要 |
This invention relates to a casting control system of a die cast machine, and more particularly to a system for controlling a high speed injection real stroke of an injection plunger and controlling valve closing timing for degassing gas in a mold cavity. The high speed injection real stroke is measured by an arithmetic unit from a signal output from a position detector, and the high speed injection real stroke is then compared with a certain preset value. When arithmetic unit determines that the high speed injection real stroke and the preset value do not coincide with each other, a pretest action delay time of the injection plunger is +/- incrementally or decrementally corrected until both values coincide. The arithmetic unit determines a start position of the high speed injection real stroke, outputs a signal to close a breathing valve at a position, to which is added or from which is subtracted a predetermined variable value with respect to the real start position and outputs a signal to open the breathing valve at a position where the injection plunger closes a molten metal feeding port.
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申请公布号 |
US5022457(A) |
申请公布日期 |
1991.06.11 |
申请号 |
US19890303236 |
申请日期 |
1989.01.30 |
申请人 |
TOSHIBA MACHINE CO., LTD. |
发明人 |
IWAMOTO, NORIHIRO;TSUBOI, HIROYUKI;KANEKO, TOSHIHIKO |
分类号 |
B22D17/32 |
主分类号 |
B22D17/32 |
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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