| 摘要 |
PURPOSE:To prevent an increase in the capacity of a motor and to reduce a cycle time, by providing a servo motor for fast mold closing operation and opening operation and an induction motor with a brake capable of outputting necessary clamping force. CONSTITUTION:When a mold is closed, an induction motor 12 is stopped and a clutch 15 is released to drive a servo motor 10. Whereupon, a ball screw 6 is rotated through a gear 11 and a belt 17 and a ball nut 7 advances and a movable platen 1 is allowed to advance. When the platen 1 reaches a position where a mold touches, the clutch 15 is thrown in and the motor 12 is driven. As a result, the torque of the motor 12 is amplified by a speed reducer 14 to drive a gear 16 and a gear 9 is rotated by the belt 17 and the screw 6 is driven by the output torque of the motor 10 and the torque of the motor 12 to clamp the mold. When set mold closing force is generated, a brake device 13 is operated to stop driving. Even when the mold is opened, mold opening operation is performed only by the motor. |
