DIE CASTING MACHINE AND CONTROL METHOD OF DIE CASTING MACHINE

摘要

The damage to devices are avoided, by performing operation control of a hydraulic operating means and an electric servomotor, that are adapted as drive sources in an injection step, separately and not performing coordinate control. A die casting machine 1 includes a tubular injection sleeve 12, an injection plunger 13, an electric servomotor 17 and a hydraulic operating means 21 which are used as a drive source of an injection step, and a control means 30 which controls the electric servomotor 17 and the hydraulic operating means separately, when injecting and filling the cavity of the mold, which has been closed, with the molten metal by the advancing of the injection plunger 13, during a low-speed injection step and a high-speed injection step which is performed at a higher speed than the low-speed injection step, in the injection step.

主权项

1. A die casting machine for injecting and filling a cavity of a closed mold with a molten metal, the machine comprising:
a tubular injection sleeve configured to receive a molten metal; an injection plunger configured to advance and retract inside the injection sleeve; an injection piston configured to advance and retract together with the injection plunger; a spool provided separately from the injection piston, and configured to press the injection piston and advance the injection plunger; a hydraulic operator configured to advance and retract the injection piston; an electric servomotor configured to advance the spool; and a controller configured to control the hydraulic operator and the electric servomotor, and to:
perform low-speed injection and high-speed injection that include injecting the molten metal received inside the injection sleeve into the cavity of the mold by advancing the injection plunger;perform the high-speed injection subsequent to the low-speed injection;perform the high-speed injection at a higher speed than the low-speed injection;make the electric servomotor stand-by so that the injection piston becomes out of contact with the spool; andadvance the injection plunger by advancing the injection piston with the hydraulic operator during the high-speed injection.