Control method for die cast machine

摘要

A control method for die cast machines, which performs multi-step injection speed control depending on a plunger position of an injection cylinder apparatus, the control method comprising the steps of; storing setting values of injection speeds of respective speed steps such as low injection speed and high injection speed and speed change-over plunger positions such as a high speed injection starting position preliminarily in memories; measuring actual values for the injection speed and speed change-over plunger position in actual casting by a speed operation unit and a high speed injection starting position detecting unit; obtaining average values of the actual values in actual castings of a predetermined frequency by an average value operation unit; and correcting control values for the injection speed and the speed change-over plunger position in next casting to be performed.