SUCK-BACK METHOD IN AN INJECTION MOLDING MACHINE

Title:

SUCK-BACK METHOD IN AN INJECTION MOLDING MACHINE

Document Type and Number:

WIPO Patent Application WO/1988/000519

Kind Code:

A1

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).

More Like This:

JP6543510	Injection molding screw, injection molding machine
JPH09123241	INJECTION CONTROLLING METHOD FOR SCREW PREPLASTICATING TYPE INJECTION MOLDING MACHINE

Inventors:

KAMIGUCHI MASAO (JP)
UMEMOTO HIROSHI (JP)

Application Number:

PCT/JP1987/000542

Publication Date:

January 28, 1988

Filing Date:

July 24, 1987

Export Citation:

Click for automatic bibliography generation Help

Assignee:

FANUC LTD (JP)

International Classes:

B29C45/50; B29C45/76; G05B19/23; (IPC1-7): B29C45/76; B29C45/50

Foreign References:

JPS60242027A	1985-12-02
JPS60262616A	1985-12-26

Other References: