| 摘要 |
PROBLEM TO BE SOLVED: To curtail an unnecessary time in a dwelling pressure application step. SOLUTION: A dwell completion switching operation SW8 is automatically set by a control unit 14 so that a dwell speed switching mode is executed (step S1). A low speed value (X) is set at a low speed value (X) setting part 9, and a molding process is initiated (step S2). It is judged whether or not a molded product is a good product (step S3). When it is judged as a good product, a molding process to complete a dwell pressure application step by turning loose a dwell pressure through setting the advancing speed of a screw 6 at the low speed value (X), is repeated 'n' times. When the molding process is repeated 'n' times, it is judged whether the dispersion of the dwell time has occurred (step S4), and when the dispersion of the dwell time falls within a tolerable range, a continuous molding process is performed in such a way that the advancing speed of the screw 6 reaches the low speed value (X), thereby turning the dwell pressure loose to complete the dwell pressure application step (step S5).
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