| 摘要 |
PURPOSE:To prevent the damage to male and female cutters at the time of the clogging of a nozzle by prohibiting the supply of a current to an electromagnetic direction changeover valve for the advance driving of the mile cutter when a screw position does not arive at an injection holding pressure changeover position at a time when the elapse of the set time of an injection filling time setting device is completed during injection filling. CONSTITUTION:Hydraulic oil is selectively supplied to a hydraulic piston 15 by a hydraulic pump 19 and, when an electromagnetic direction changeover valve 16 is excited, the hydraulic piston 15 moves to the right and a male cutter 10 advances and, when an electromagnetic direction changeover valve 17 is excited, the male cutter 10 retreats. A control unit 25 outputs an excitation signal to the electromagnetic direction changeover valves 16, 17 and an injection filling time setting device 26 prescribing the completion of injection filling is provided. When the clogging of a nozzle is generated, unless a screw does not arrive at the set position of an injection holding pressure changeover position setting device 27 within the set time of the injection filling time setting device 26, the circuit of the electromagnetic direction changeover valve 16 for the male cutter is turned off to prohibit the advance of the male cutter. |
