| 摘要 |
PURPOSE:To simplify an installation by providing a selector for a speed control circuit and torque control circuit for an electric motor, a device for indicating the point of the time for the selection, a screw bar connected to the motor for moving upward and downward a moving table installed with a moving die and a pressurizing device. CONSTITUTION:The screw bar 36, a cylinder 41 and the moving table 4 pressurize the moving die 6. A command to start a transfer 48 by connecting a clutch 44 and driving the motor 42 is emitted from a control device 61. A timer 51 is started and a selection switch 59 is connected to an amplifier 55 side so that the command for the initial speed and the speed corresponding to the set pattern is kept emitted from a speed pattern generator 53. A series of the loop consisting of the generator 53, a differential device 54, the amplifier 55, a power amplifier 60, the motor 42 and a speed power generator 42a constitutes a motor speed control system. The transfer 48 increases at the speed corresponding to the speed command. The switch 59 changes over to a pressure setter 56 side when the timer 51 operates. Then the specified current flows to the motor 42 and the motor and the transfer are controlled to the specified torque under which molding is executed.
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