METHOD FOR CONTROLLING A VACUUM VALVE OF A VACUUM DIECASTING DEVICE AND VACUUM DIECASTING DEVICE

摘要

The invention relates to a vacuum diecasting device that comprises a castingcavity (10) which can be evacuated via a vacuum valve (26) and into which aliquid casting material can be pressed by a piston (14) that is actuated by anactuator (17). The device further comprises a level sensor (20) for detectinga level of the casting material in the casting cavity, a control device (34),linked with the level sensor, for controlling the vacuum valve, and a positionsensor (32), linked with the control device (34), for detecting the movementof the piston (14). The control device produces a close signal for the vacuumvalve (26) when the piston, once position (s1) is reached, at which the levelsensor (20) indicates a predetermined level of the casting material in thecasting cavity (10), has been displaced in a predetermined manner.