Injection apparatus and molding machine
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United States of America Patent
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Oct 22, 2019
Grant Date -
Oct 11, 2018
app pub date -
Apr 4, 2018
filing date -
Apr 6, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
In an injection cylinder which can be connected with a plunger, the internal portion of the cylinder part is partitioned by a piston into a rod-side chamber on the side of the piston rod and a head-side chamber on the opposite side. An accumulator can supply a hydraulic fluid to the head-side chamber. A head-use pressure sensor can detect a pressure of the head-side chamber. A flow control valve can control a flow rate of the hydraulic fluid discharged from the rod-side chamber. A control device includes an OP control part which starts open control driving the flow control valve to the opening direction after the start of supply of the hydraulic fluid from the accumulator to the head-side chamber conditional on the detection pressure of the head-use pressure sensor rising up to the predetermined set value.
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