| 摘要 |
PROBLEM TO BE SOLVED: To easily set the dwelling pressure of a dwelling process in injection molding and to reduce the difference of shrinkage anisotropy due to the distance from the gate of a molded product. SOLUTION: In the molding process of an injection molding machine, the dwell pressure in the dwelling process is temporarily set to a predetermined pressure lower than the resin filling pressure detected by a pressure sensor 24 at the point of time when a filling process is changed over to the dwelling process and the displacement signal outputted from a displacement sensor 19 is sampled at a predetermined frequency during the predetermined time from the point of time of changeover in a state that the dwell pressure of the dwelling process is held to the temporarily set pressure. After the sampled displacement signal is converted to graph display data, the displacement of an injection plunger accompaned by the elapse of time from the point of time of changeover is displayed on a display part as a graph on the basis of the graph display data to determine whether or not the temporarily set pressure is dwelling pressure for minimizing the anisotropy of a molding shrinkage factor, from the graph displayed on the display part. COPYRIGHT: (C)2005,JPO&NCIPI
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