| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding machine in which energy saving is achieved even in a mold clamping device needing pressing over a long time while using an electric motor and achieving high accuracy and energy saving in an injection device.SOLUTION: There is provided an injection molding machine 11 in which the operation of a screw 14 of an injection device 13 is performed by electric motors 15, 16 and the operation of mold clamping cylinder 18 of a mold clamping device 17 is performed by hydraulic pressure. The injection molding machine comprises: a servo motor 15 for injection; a servo motor 16 for metering; a first pump 42 in which an electric motor 45 is continuously rotated for performing the operation of the mold clamping device 17; and a second pump 56 in which an electric motor 55 is stopped or rotated at the lowest rotation frequency upon operation of any of actuator 15, 16, 24, 31, 35 or 39 other than the mold clamping cylinder 18. The electric motors 45 and 55 of the first and second pumps 42 and 56 are servo motors, respectively. |
