Patent ID: 7726381
Filing Date: 2010-06-01
Classification: B22D

Abstract:
1. A control method of a die-casting machine for injecting/filling molten metal into a cavity of a mold through an injection sleeve, the control method comprising the steps of: transferring a driving force of an electric servo motor to an injection member, by which a molten metal in an injection sleeve is injected into the cavity, through a fly-wheel and a crank mechanism, in which a force input terminal thereof is connected to the fly-wheel, and transferring the driving force of the servo motor to the injection member through the fly-wheel and the crank mechanism during a course between a stage where the molten metal has not vet reached a gate of the mold and a stage where the molten metal begins to pass the gate of the mold so as to accelerate the speed of the injection member in a smooth speed characteristic curve, which does not have a broken-line characteristic.