Method and system of controlling injection molding machines
First Claim
1. A method of adjusting the injection condition of an injection molding machine in which molten metal in an injection cylinder is injected into a metal mold by an injection plunger operated by an oil pressure operator and in which pressurized oil supplied to said oil pressure operator is adjusted through adjustable valve means actuated by actuator means, said method comprising the steps of:
- calculating an injection time, a filling stroke, and an effective stroke;
calculating a high injection speed based on said injection time and said filling stroke;
calculating an injection speed change over position based on said filling stroke and said effective injection stroke;
forming an injection command signal based on said calculated high injection speed and said calculated injection speed change over position; and
applying said injection command signal to said actuator so as to set said adjustable valve means at an optimum injection condition.
1 Assignment
0 Petitions
Accused Products
Abstract
In a method and system of controlling an injection molding machine in which molten metal in an injection cylinder is injected into a metal mold by an injection plunger operated by an oil pressure operator and in which pressurized oil is supplied to the oil pressure operator through adjustable valve means actuated by actuator means, various factors relating to an injection condition are measured and an injection command signal is calculated based on the measured factors for providing a predetermined injection pattern. The actuator means is operated by the injection command signal so as to adjust the adjustable valve means to a degree of opening necessary to establish an optimum injection condition.
34 Citations
7 Claims
-
1. A method of adjusting the injection condition of an injection molding machine in which molten metal in an injection cylinder is injected into a metal mold by an injection plunger operated by an oil pressure operator and in which pressurized oil supplied to said oil pressure operator is adjusted through adjustable valve means actuated by actuator means, said method comprising the steps of:
-
calculating an injection time, a filling stroke, and an effective stroke; calculating a high injection speed based on said injection time and said filling stroke; calculating an injection speed change over position based on said filling stroke and said effective injection stroke; forming an injection command signal based on said calculated high injection speed and said calculated injection speed change over position; and applying said injection command signal to said actuator so as to set said adjustable valve means at an optimum injection condition. - View Dependent Claims (2)
-
-
3. A system of controlling an injection molding machine of the type wherein molten metal in an injection cylinder is injected into a metal mold by an injection plunger operated by an oil pressure operator and in which pressurized oil is supplied to the oil pressure operator through adjustable valve means actuated by actuator means, said system comprising:
-
measuring means for measuring various factors relating to an injection condition of said injection molding machine; means for calculating a high injection speed of said injection plunger based on said measured factors; means for calculating an injection speed changeover position; means for calculating an injection command signal based on said calculated injection speed and said calculated injection speed changeover position to provide a predetermined injection pattern; and means for operating said actuator means in accordance with said injection command signal so as to adjust said adjustable valve means to a degree of opening necessary to establish an optimum injection condition. - View Dependent Claims (4, 5, 6, 7)
-
Specification