Title:
METHOD FOR CONTROLLING DWELLING IN MOTOR-DRIVEN INJECTION MOLDING MACHINE
Document Type and Number:
Japanese Patent JP3157780
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for controlling dwelling for preventing collision of a screw.
SOLUTION: A speed command Pc output from a differential amplifier 30 is sequentially compared with a speed command Vc from a position controller 26 with respect to amplitude relation by a comparator 31 based on a deviation of a detected injection pressure Pf from a set injection pressure Ps. A changeover switch 32 is operated by an output from the comparator 31, and the speed command of smaller value of the commands Pc and Vc is input to a speed controller 27 to drive an injection servo motor 2. When filling of resin becomes insufficient so that a resin pressure in later half of the injection does not arrive at the set value Ps, the command Vc < the command Pc is satisfied. Further, since the command Vc from the controller 26 becomes '0' at the stage of arriving the screw at a target position so that a positional deviation becomes '0', the screw is automatically stopped at the target position to prevent collision of the screw with a cylinder.
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Inventors:
Kamiguchi, Masao
Inoue, Kozo
Neko, Tetsuaki
Inoue, Kozo
Neko, Tetsuaki
Application Number:
JP18136598A
Publication Date:
April 16, 2001
Filing Date:
June 15, 1998
Export Citation:
Assignee:
FANUC LTD
International Classes:
B29C45/57; B29C45/77; (IPC1-7): B29C45/57
Attorney, Agent or Firm:
竹本 松司 （外４名）
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