Patent ID: 8225842

Claim:
A die casting machine comprising: an electric servomotor for injection in a first stage, which is fixed to a motor mounting plate; a motion converting mechanism in the first stage, which converts rotational motion of the electric servomotor for injection in the first stage into rectilinear motion of a linear motion body; an electric servomotor for injection in a second stage, which is mounted on the linear motion body; a motion converting mechanism in the second stage, which converts rotational motion of the electric servomotor for injection in the second stage into rectilinear motion of an injection plunger; and a control unit which controls driving of the electric servomotors for injection; the die casting machine being characterized in that: the control unit drives only the electric servomotor for injection in the first stage independently in a low-speed injection step, and drives both the electric servomotor for injection in the first stage and the electric servomotor for injection in the second stage simultaneously in a high-speed injection step and a pressure intensification step.