| 摘要 |
PURPOSE:To simplify an installation by providing a pressure setter and pressure detector for a pressurizing device, a circuit for speed control of an electric motor which controls the speed thereof in accordance with a set speed pattern, a circuit for controlling the torque of the motor when the detected pressure coincides with the set value and a selector for both circuits. CONSTITUTION:A screw bar 36, a cylinder 41 and a moving table 4 pressurize a 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 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 52. 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 2a constitutes a motor speed control system. The speed of the transfer 48 increases at the speed corresponding to the speed command. A comparator 64 operates and the switch 59 is changed over to the pressure setter 56 side when the output from the torque detector 42b coincides with the set value of the pressure setter 56. The motor and the transfer are thus controlled to the specified torque under which molding is executed.
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