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    • 50. 发明授权
    • Casting control system of die cast machine
    • 压铸机铸造控制系统
    • US5022457A
    • 1991-06-11
    • US303236
    • 1989-01-30
    • Norihiro IwamotoHiroyuki TsuboiToshihiko Kaneko
    • Norihiro IwamotoHiroyuki TsuboiToshihiko Kaneko
    • B22D17/32
    • B22D17/32
    • 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.
    • 压铸机的铸造控制系统技术领域本发明涉及一种压铸机的铸造控制系统,更具体地说,涉及一种用于控制喷射柱塞的高速喷射实际行程的系统,并且控制关闭模具腔中的气体的关闭正时。 通过来自位置检测器的信号的运算单元测量高速喷射实际行程,然后将高速喷射实际行程与某个预设值进行比较。 当运算单元确定高速喷射实际行程和预设值不一致时,注射柱塞的预测试动作延迟时间是+/-递增或递减校正直到两个值相符。 算术单元确定高速喷射实际行程的开始位置,输出一个关闭呼吸阀的信号,该位置被添加或相对于实际开始位置减去预定变量值,并输出一个 信号以在注射柱塞关闭熔融金属进料口的位置处打开呼吸阀。