| 摘要 |
PROBLEM TO BE SOLVED: To confine thickness of a molded product within a regulated value and effectively exhaust gas produced during molding by installing a program setting part for outputting the setting signal of a target distance between a fixed plate and a movable plate, and a drive part for moving the fixed plate and the movable plate for approaching/separating the fixed plate and the movable plate based on the signal from a computing unit for comparing the signal and the position signal of the detector. SOLUTION: When oil pressure in a rising chamber of a cylinder 2 reaches contact pressure of a molded product 20, a program setting part 18 starts outputting a given pattern setting signal for a target distance between a fixed plate 5 and a mobile plate 4. Direction switch valve 17 is switched based on the signal. A computing unit 19 compares and computes the setting signal with the signal of a position detector 10 for detecting a distance (L) between the fixed plate 5 and the mobile plate 4, and performs a closed loop control to an electromagnetic flow rate control valve 15 in a way that the distance L becomes a given pattern so as to control working oil volume with meter-in. A driving unit 21 moves the mobile plate 4 for approaching/separating from the fixed plate 5. An electromagnetic pressure control valve 16 limits maximum oil pressure.
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