公开(公告)号：WO1988000518A1

公开(公告)日：1988-01-28

申请号：PCT/JP1987000541

申请日：1987-07-24

Applicant: FANUC LTD ,  KAMIGUCHI, Masao ,  UMEMOTO, Hiroshi

Inventor： FANUC LTD

IPC: B29C45/76

CPC classification number: G05B19/232 ,  B29C45/76 ,  G05B2219/42126 ,  G05B2219/45244

Abstract: In an injection molding machine employing a servo motor as a source for driving the injection axle to drive the screw in the axial direction, a method is provided to smoothly shift the dwelling step to the metering/kneading step, in order to prevent the error register in the servo circuit from overflowing and to prevent the injection molding machine from coming into halt. When the dwelling step is finished, the error register is followed up (steps S6 to S8) such that the error quantity stored in the error register of the servo circuit that drives the servo motor for injection axle becomes zero. Then, a torque limit value to be applied to the servo motor is switched from a setpoint value for dwelling to a setpoint value for metering and kneading (step S11). The error register is then followed up again over a predetermined period of time from when the torque limit value is switched (step S13), and the step is shifted to the metering/kneading step (step S14).

公开(公告)号：WO1989007043A1

公开(公告)日：1989-08-10

申请号：PCT/JP1989000088

申请日：1989-01-30

Applicant: FANUC LTD ,  NEKO, Noriaki ,  UMEMOTO, Hiroshi ,  KUBOTA, Kazuo

Inventor： FANUC LTD

IPC: B29C45/76

CPC classification number: G05B19/4147 ,  B29C45/561 ,  B29C45/76 ,  G05B2219/34388 ,  G05B2219/45244 ,  G05B2219/50234

Abstract: This invention provides a method and an apparatus for injection compression molding which can give products having a high quality but less variance by effecting precisely a molten resin compression operation during a dwelling operation or a metering operation. A numeric control processor, which drives and controls a servo motor of each shaft of the injection molding machine on the basis of the information which specifies a shaft for compressing the molten resin and is outputted from a programmable machine controller for the sequence control of each operation portion of the injection molding machine, the information for the control of the molten resin compression inclusive of the feed quantity, feed speed and feed direction of the shaft for compressing the molten resin and a molten resin compression operation instruction after the passage of a preset time from the start of the injection operation, executes in parallel the pulse distribution for the shaft for the molten resin compression and the pulse distribution for the injection shaft or the screw rotary shaft (S200, S205) and performs torque limit control of the output torque of the compression servo motor so that an actual compression force on the molten resin has a preset value.

公开(公告)号：WO1988000519A1

公开(公告)日：1988-01-28

申请号：PCT/JP1987000542

申请日：1987-07-24

Applicant: FANUC LTD ,  KAMIGUCHI, Masao ,  UMEMOTO, Hiroshi

Inventor： FANUC LTD

IPC: B29C45/76

CPC classification number: G05B19/232 ,  B29C45/76 ,  B29C2045/1792 ,  B29C2045/5096 ,  G05B2219/45244

Abstract: In an injection molding machine employing a servo motor as a source for driving the injection axle to drive the screw in the axial direction, a suck-back method is provided to smoothly carry out suck-back, preventing the screw from proceeding in suck-back at the final step of metering and kneading. When the screw reaches the metering completion position, the screw is no more turned, and the error register is followed up (S1, S4, S5) such that the error quantity stored in the error register becomes zero. Then, a torque limit for imparting a preset back pressure for the servo motor is released (S8). The screw is then retreated using a servo motor by a predetermined sack-back amount (S11).