Controller of injection molding machine

Abstract

Abstract PURPOSE:To obtain a favorable molded product by controlling pressure and a speed accurately without generating a sudden variation in speed surge and pressure, by providing a setting device where a target value to be displayed in the form of a multidimensional pattern is set up, a calculator where a feedback quantity to an operation quanity is obtained by multiplying a measured value by a feedback coefficient and a compensator where a deviation between a target value and the feedback quantity is obtained and the operation quantity of injection equipment is put out by correcting the said deflection. CONSTITUTION:A curve (pattern f) is decided as a function of a time (t), an injection speed (v) and injection pressure (Pa). The pattern (target value) is stored in a pattern setting instrument 1a beforehand. On one hand, control quantities of a plurality of control objects 1d of an injection molding machine are applied to a feedback quantity calculator 1c and a feedback quantity is calculated for the control quantity. A deviation between the pattern and feedback quantity is obtained by an adding instrument 1e of a compensator 1b, gain and phase control is performed further by a compensating element if constituted of an integrator and applied to the control object 1d as an operation quantity.

Inventors

• 👤 Tomoyuki Akashi
• 👤 友行 明石

Bibliographic Details