Control system for controlling a motor-driven injection molding

Details Control system for controlling a motor-driven injection molding Control system for controlling a motor-driven injection molding

1997-06-06

1999-02-09

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

264 407, 425149, 425170, B29C 4577

Patent

active

058691081

ABSTRACT:
In a control system for controlling a motor-driven injection molding machine that comprises an injection unit driven by a servo-motor and a speed feedback control loop for controlling the servo-motor, an amplifier produces a command signal indicative of a torque command value for the servo motor in accordance with a difference between a sensed speed value obtained by a rotation speed sensor and a speed command value. A pressure sensor senses a pressure of resin within a mold to produce a sensed pressure signal indicative of a sensed pressure. A correction amplifier amplifies the sensed pressure signal to produce an amplified signal as a correction value for a torque command value. An adder adds the torque command value and the correction value to produce an addition result to a motor drive.

REFERENCES:
patent: 5331264 (1994-07-01), Cheng et al.
patent: 5380181 (1995-01-01), Hiraoka et al.
patent: 5421712 (1995-06-01), Laing et al.
patent: 5494427 (1996-02-01), Arai
patent: 5518390 (1996-05-01), Nakamura et al.
patent: 5723079 (1998-03-01), Fujita et al.

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