Control system for an injection molding machine and a method for controlling the injection molding machine
AssigneeSumitomo Heavy Industries, Ltd.
InventorMitsuaki Amano
Life of this patent
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Abstract
A control system for an injection molding machine performs a molding cycle. The molding cycle includes a filling process for controlling an advancing motion of a screw of the injection molding machine, and a hold press process for controlling a pressure of a molten resin after the filling process. The control system includes retracting speed limit means for limiting a retracting speed of the screw to a predetermined retracting speed limit value after a pressure control in the hold press process begins.
Claims17
A control system for an injection molding machine that performs a molding cycle,
- the molding cycle including a filling process for controlling an advancing motion of a screw of the injection molding machine, and a hold press process for controlling a pressure of a molten resin after the filling process,
- the control system comprising retracting speed limit means for limiting a retracting speed of the screw to a predetermined retracting speed limit value after a pressure control in the hold press process begins.
A method for controlling an injection molding machine that performs a molding cycle,
- the molding cycle including a filling process for controlling an advancing motion of a screw of the injection molding machine, and a hold press process for controlling a pressure of a molten resin after the filling process,
- the method comprising a step for limiting a retracting speed of the screw to a predetermined retracting speed limit value after a pressure control in the hold press process begins.
A method for controlling an injection molding machine comprising the steps of:
- a) advancing a screw of the injection molding machine so that a cavity of a mold is filled with a molten resin;
- b) retracting the screw based on a difference between a detected pressure of the molten resin and a predetermined pressure of the molten resin;
- and
- c) limiting a retracting speed of the screw until the detected pressure of the molten resin reaches the predetermined pressure.
A control system for an injection molding machine,
- the injection molding machine including a screw which is advanced by a driving device so that a cavity of a mold is filled with a molten resin, and which is retracted based on a difference between a detected pressure of the molten resin and a predetermined pressure of the molten resin after the mold is filled with the molten resin,
- the control system comprising a controller for limiting a retracting speed of the screw until the detected pressure of the molten resin reaches the predetermined pressure.
Dependencies are inferred from the claim text.