Mold clamping method for an injection molding machine
AssigneeThe Japan Steel Works, Ltd.
InventorSouma Mitani
Life of this patent
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Abstract
A mold clamping device includes two mold platens; a ball screw mechanism connecting the mold platens to each other, the ball screw mechanism being provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism; a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism; and a control device configured to: monitor the axial force detected by the axial force detector during injection; and based on detecting an axial force increase, the axial force increase being an increase in the axial force, perform a mold clamping force increase control including driving the servo motor to increase a mold clamping force for tightening the ball screw mechanism.
Claims6
A mold clamping method executable by in a mold clamping device,
- the mold clamping device comprising:
- two mold platens;
- a ball screw mechanism connecting the mold platens to each other;
- and
- a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism, the ball screw mechanism being provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism,
- the mold clamping method comprising:
- clamping a mold provided in the mold clamping device to generate a mold clamping force;
- monitoring a change in the axial force detected by the axial force detector during injection;
- and
- based on detecting an axial force increase in the axial force monitoring step, the axial force increase being an increase in the axial force, increasing a mold clamping force for tightening the ball screw mechanism by driving the servo motor.
Dependencies are inferred from the claim text.