METHOD FOR CONTROLLING BACK PRESSURE OF SCREW OF ELECTROMOTIVE INJECTION MOLDING MACHINE

Japanese Patent JP3881319

B2

PROBLEM TO BE SOLVED: To provide a method for controlling the back pressure of the screw of an electromotive injection molding machine capable of stably obtaining the same control precision as feedback control by a simpler constitution despite ON-OFF control different from feedback control.
SOLUTION: The electromotive injection molding machine is equipped with a sensor 21, servo motors 15 and 15, and a control device 30. The control device 30 is constituted so as to repeat a first process for controlling the rotation of the servo motors 15 and 15 on the basis of a first retreat speed command value 33 for letting a screw 13 retreat at a low speed when the back pressure signal in a plasticizing process for rotating the motor 23 is smaller than a back pressure set value 31 and a second process for controlling the rotation of the servo motors 15 and 15 on the basis of a second retreat speed command value 34 for letting the screw 13 retreat at a high speed when the screw back pressure signal is larger than the back pressure set value 31.

JPH01234222	MOLDING BY MEANS OF INJECTION AND COMPRESSION MOLDING MACHINE AND ITS MOLDING DEVICE
WO/2017/105980	REMOTE CONTROLLER FOR CONTROLLING APPARATUS BY DIVERTING FEEDBACK SIGNAL FROM NATIVE CONTROLLER TO THE REMOTE CONTROLLER AND METHODS FOR SAME

Keijiro Oka
Yasuhiro Yabuki

JP2003034695A

February 14, 2007

February 13, 2003

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Meiki Seisakusho Co., Ltd.

B29C45/77; B29C45/48; B29C45/50; (IPC1-7): B29C45/77; B29C45/48

JP1280523A
JP2002200656A
JP61110524A
JP9254206A
JP61031221A

Noriaki Goto

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