| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vacuum suction device reducing an amount of energy consumption by vacuum means through simple control without performing pressure setting for the actuation and stop of the vacuum means for each molded article, and preventing the drop of the molded article. Ž<P>SOLUTION: This vacuum suction device includes a vacuum means making vacuum pressure act on a suction member, a pressure retaining valve making the vacuum means and the suction member communicated or cutting off the communication, a pressure detector detecting the pressure in the suction member via piping, and a control means controlling the actuation of the vacuum means and the pressure retaining valve. The control means executes control for opening the pressure retaining valve and actuating the vacuum means, and when the pressure detected by the pressure detector is constant for a prescribed time when the workpiece is sucked by the suction member, it executes control for closing the pressure retaining valve and stopping the actuation of the vacuum means. Then, when the pressure detected by the pressure detector is reduced by a certain amount of width, it executes control for opening the pressure retaining valve, and actuating the vacuum means. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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