| 摘要 |
An injection pressure waveform for use as a target value for injection pressure feedback control is set based on the actual injection pressure waveform detected when a conforming molded article is obtained. Alternatively, the target injection pressure waveform may be set by modifying a previously retained injection pressure waveform or an actual injection pressure waveform. The previously retained injection pressure waveform or actual injection pressure waveform is displayed on a screen of a display device (T 1 ). Two points on the displayed injection pressure waveform are assigned, and the pressure waveform is modified into a line connecting these two points (T 3, T 6, T 8 ). Further, two points on the injection pressure waveform and one point between these two points are assigned, and the pressure waveform is modified into a circular arc connecting these three points (T 4, T 7, T 8 ). The injection pressure waveform modified in this manner is set as the target value for the injection pressure feedback control (T 8, T 9 ).
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