Injection molding apparatus
First Claim
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1. An automatic injection conditions setting apparatus for use in an injection molding apparatus comprising:
- injection pressure detecting means for detecting an injection pressure;
injection time detecting means for detecting an injection time;
injection quantity detecting means for detecting an injection quantity;
a memory device for storing optimal values of parameters, including a cushion quantity, an injection pressure and an injection speed, for injection conditions corresponding to a time interval from a time at which injection is started to a time at which a maximum injection pressure is obtained, and an injection quantity for the corresponding time interval; and
control means, operable during trial injection, for causing said injection time detecting means and said injection quantity detecting means to detect a time and an injection quantity for which said injection pressure detecting means detects the maximum injection pressure, so long as the trial injection is being performed, and for reading out values of the parameters of the injection conditions from said memory device in accordance with the detected time and the detected injection quantity, to automatically set the readout values of the parameters of the injection conditions as optimal values of the injection conditions for production of injection molding products.
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Abstract
An injection molding apparatus for automatically presetting parameters of injection conditions by performing trial injection. A time (T0) and an injection quantity (C0) are obtained (step 124), wherein a drive current (I2) of a servo motor (M2) for performing trial injection reaches a drive current (i0, step 123) corresponding to a maximum injection pressure. Parameters (A, B, D) of the injection conditions stored in a memory, are read out in accordance with the detected time (T0) and the detected injection quantity (C0) to automatically set the injection conditions (step 131).
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11 Claims
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1. An automatic injection conditions setting apparatus for use in an injection molding apparatus comprising:
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injection pressure detecting means for detecting an injection pressure; injection time detecting means for detecting an injection time; injection quantity detecting means for detecting an injection quantity; a memory device for storing optimal values of parameters, including a cushion quantity, an injection pressure and an injection speed, for injection conditions corresponding to a time interval from a time at which injection is started to a time at which a maximum injection pressure is obtained, and an injection quantity for the corresponding time interval; and control means, operable during trial injection, for causing said injection time detecting means and said injection quantity detecting means to detect a time and an injection quantity for which said injection pressure detecting means detects the maximum injection pressure, so long as the trial injection is being performed, and for reading out values of the parameters of the injection conditions from said memory device in accordance with the detected time and the detected injection quantity, to automatically set the readout values of the parameters of the injection conditions as optimal values of the injection conditions for production of injection molding products. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification