Injection molding machine

Abstract

Abstract PURPOSE:To obtain a good molding without any speed surge and pressure exceeding, by giving weights on speed and pressure controllings and by changing a weight coefficient with screw positions. CONSTITUTION:A speed weight parameter and a pressure weight parameter are input in a weight operational device 31 from a program setting device 28 according to a screw position input from a displacement detecting device 10. The program setting device 28, on the other hand, inputs a speed setting value and a pressure setting value into an injection speed controlling device 13 and a pressure keeping controlling device 17 respectively according to the screw position. The injection speed controlling device 13 calculates a speed deviation between a detected value and a setting value of the screw speed and inputs it into the weight operational device 31 as a speed servo command. The pressure keeping controlling device 17 calculates a pressure deviation between a detected value and a setting value of the pressure of a cylinder chamber 4a and inputs it into the weight operational device 31 as a pressure servo command. The weight operational device 31 calculates an overall servo command, by which the degree of the opening of a servo value is controlled.

Inventors

• 👤 Yoji Kobayashi
• 👤 洋二 小林

Bibliographic Details