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US 6,555,034 B2Granted
Method for controlling an injection molding machine capable of reducing variations in weight of molded products
AssigneeSumitomo Heavy Industries, Ltd.
InventorHiroyoshi Suumen
Life of this patent
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Abstract
A control method for an injection molding machine comprises the steps of measuring a density of a molten resin in a heating cylinder, controlling a stroke of an injection screw in an injection process by feed forward control based on the measuring step, and controlling an operating parameter of the injection molding machine based upon the measuring step.
Claims9
A method for controlling an injection molding machine, said method comprising the steps of:
- measuring a density of a molten resin in a heating cylinder;
- controlling a stroke of an injection screw in an injection process by feed forward control based on the measuring step;
- and
- controlling an operating parameter of the injection molding machine based upon the measuring step.
1 more element
A method of controlling an injection molding machine, said method comprising the steps of:
- measuring a density of molten resin in a heating cylinder;
- determining a state of a temperature of the heating cylinder based upon a predetermined algorithm;
- and
- controlling a temperature of the heating cylinder based upon the measuring step and the determined state of the temperature, thereby minimizing variations in density of the molten resin.
1 more element
Dependencies are inferred from the claim text.