Fanuc Corporation

Yuichi Hosoya

Masao Kamiguchi

Tatsuhiro Uchiyama

Noriaki Neko

Susumu Ito

Kaoru Hiraga

Minoru Kobayashi

Masato Yamamura

Hideki Koyama

Takayuki Taira

Nobuto Takeda

Koji Senda

A controller of an injection molding machine stores used/unused information in relation to each of the maximum number of controllable servo amplifiers, outputs an interruption request signal requesting power interruption in a lump to apart of or all of these plurality of servo amplifiers, and receives a power interruption confirmation signal confirming that the motor power of the servo amplifiers is interrupted. Further, the controller determines, on the basis of the interruption request signal, the power interruption confirmation signal and the used/unused information, whether or not interruption driving the servo motor is normally operated.

Motor power interrupting device of injection molding machine

A controller and a method for an ejector mechanism in an injection molding machine for appropriately setting a terminal position of a forward motion of ejector pins of the ejector mechanism. The terminal position of the forward motion is set to a position where an elastic force of return springs does not exceed a retaining force of a brake device for retaining the ejector pins at the terminal position. The elastic force of the springs are detected during the ejector pins are moved forward. A position of the ejector pins immediately before the detected elastic force of the springs exceeds the retaining force of the brake device is determined and displayed on a display device as a criterial position. The terminal position of the forward motion of the ejector pins is set not to exceed the determined criterial position.

Controller for an ejector mechanism in an injection molding machine

Injection molding control method for an injection molding machine

A mold clamping control method capable of preventing any warp or strain on a molded product without stopping an injection pressure holding process so as to cancel the pressing force of an injection screw. In a series of injection and pressure holding processes, a movable platen is retracted from a mold clamping dwell position P2 to a mold opening dwell position P1, so that a substantial volume of a cavity of a mold is increased to temporarily lower the internal pressure of the cavity, thus making an internal stress of resin to be a product uniform to eliminate stress strains. In this method, an injection molding is performed to produce a precise product having no warp or strain even in molding a light guide plate which is subjected to molding abnormalities by the temporary stoppage of the injection pressure holding process according to the conventional method.

Mold clamping control method for injection molding machine

Method of controlling an ejector of an injection molding machine

An average is obtained between output readings of a pressure sensor obtained when forward and reverse thrusts are applied to an injection screw by positively driving a servomotor for injection. The average value is used as a correction value for a reading deviation of the pressure sensor. The injection servomotor is positively driven to apply a thrust to the screw. This known thrust and the actual reading of the sensor are compared. A deviation between these values is used as the correction value for the reading deviation of the sensor.

Zero correction method for a pressure detecting device of an injection

Injection control method in an electrically-operated injection molding

Method of automatic zero adjustment of an injection-molding machine and

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Yamanashi, Japan

Yuichi Hosoya