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

摘要

A vacuum die casting apparatus includes a casting cavity ( 10 ), which is evacuatable via a vacuum valve ( 26 ). A liquid casting material is pressable into the casting cavity by a piston ( 14 ) actuated by an actuator ( 17 ). A filling level sensor ( 20 ) detects a predetermined filling level of the casting material in the casting cavity. A control device ( 34 ) is connected to the filling level sensor for controlling the vacuum valve, and a position sensor ( 32 ) is connected to the control device ( 34 ) for detecting movement of the piston ( 14 ). The control device generates a closing signal for the vacuum valve ( 26 ) when the piston, after reaching the position (sSUB1/SUB) at which the filling level sensor ( 20 ) indicates a predetermined filling level of the casting cavity ( 10 ) with casting material has been reached, is displaced in a predetermined manner.