| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problem: in a vertical injection molding machine in which a movable platen is moved vertically in relation to a lower mold by a hydraulic cylinder, when the movable platen is elevated toward an ascending target position and stopped, when the falling of the movable platen by its own weight is detected, the operation of the molding machine is stopped, and a time loss occurs until the molding machine is operated again. SOLUTION: In the control of the vertical injection molding machine 1 in which the upper movable platen 7 is moved vertically in relation to a lower platen by the hydraulic cylinder 8, when the platen 7 is elevated toward the ascending target position LS-O by the hydraulic cylinder 8 and stopped, when the falling of the platen 7 from the target position LS-O is detected, the platen 7 is again elevated toward a re-ascending target position LS-OP which is set to be by a prescribed distance A higher than the position LS-O by the hydraulic cylinder 8. COPYRIGHT: (C)2004,JPO
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