| 摘要 |
PURPOSE:To make it possible to reproduce speeds and pressures at the same condition in the respective injection processes by a method wherein the deviations of metered values are calculated so as to determine correction values of meterings and correction values of speed change-over positions. CONSTITUTION:In the initial state, the set values of a metering setter 5 are divided into strokes S1, S2...Sn by speed change-over position setters 7-1...7-n. When the metered value changes to S+DELTAepsilon at molding operation, the deviations of the outputs of a positional detector 1 from the set values of the metering setter 5 are calculated and the calculated deviations are added to or subtracted from the respective set values of the metering setter 5 and of the speed change- over position setters 7-1...7-n and resultant corrected values are given to a metering corrector 8 and speed change-over position correctors 9-1...9-n. As the result, the strokes S1, S2...Sn in respective stages are kept constant and a filling process is performed in accordance with the respective corrected values. When the speed signal sent from a transducer 2 and the set value of a dwell change-over speed setter 3 coincide with each other due to the lowering of the speed of a screw at the stroke Sn in the final stage, the injection process is changed-over to the dwell process so as to finish the injection process stably.
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