Patent ID: 7316259
Filing Date: 2008-01-08
Classification: B22D

Abstract:
1. A diecasting machine provided with a mold and an injection plunger to inject and fill molten metal in said mold by an advancement of said injection plunger, comprising: an electric servomotor usable as a first drive source capable of driving said injection plunger at an advancing speed lower than 1 m/sec; a hydraulic drive source usable as a second drive source capable of driving said injection plunger at an advancing speed not lower than 1 m/sec; and an accumulator mounted on the machine as said hydraulic drive source; wherein in a low-speed injection step during an injection step, said injection plunger is driven forward by only said electric servomotor; and in a high-speed injection step during an injection step, said injection plunger is driven forward by said hydraulic drive source and said electric servomotor.