| 摘要 |
PROBLEM TO BE SOLVED: To stop a mold precisely at a prescribed mold opening position irrespective of the operation of an operation door by a method in which when the door is changed over from a standard opening or closing state to an opening or closing state, the opening/closing quantity of a hydraulic oil pipe line is controlled at a flow rate command value determined on the basis of the hydraulic oil supply quantity in a standard state to open a mold. SOLUTION: The presence/absence of a mold opening command is judged by starting an apparatus (S1), completion is made by the absence, and it is judged whether a mold is at a mold opening stopping position or not by the presence (S2), and completion is made by the stopping position. In the case of 'on the way', the opening/closing state of an operation door is investigated (S3). In the case of 'opening', it is judged whether a mold opening speed setting value SV is equal to or below a threshold L1 or not (S4), In the case of 'not', it is judged whether it is equal to or below a threshold L2 or not (5). In the case of 'closing' in S3 and 'yes' in S4 and S5, a flow rate command value Y is operated on the basis of the setting value SV, the operation result is compared with 1023 to be converted into a voltage command value, the flow rate is adjusted and the mold is opened. In this way, the mold can be stopped precisely at a prescribed mold stopping position irrespective the operation of the door.
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