DEVICE AND METHOD FOR CONTROLLING AND REGULATING THE MOLD FILLING SPEED AND THE CASTING PRESSURE OF A LOW PRESSURE CHILL CASTING MACHINE

DEVICE AND METHOD FOR CONTROLLING AND REGULATING THE MOLD FILLING SPEED AND THE CASTING PRESSURE OF A LOW PRESSURE CHILL CASTING MACHINE. A DEVICE AND METHOD FOR CONTROLLING AND REGULATING THE MOLD FILLING SPEED AND THE CASTING PRESSURE OF A LOW PRESSURE CHILL CASTING MACHINE, PREFERABLY FOR ALUMINIUM CASTING, WHOSE HERMETICALLY CLOSABLE FURNACE CHAMBER RECEIVING THE LIQUID CASTING MATERIAL CAN BE CONNECTED TO THE CHILL MOLD VIA A RISER TUBE LEADING TO THIS, VIA WHICH THE CASTING MATERIAL IS PRESSED INTO THE CHILL MOLD BY MEANS OF GAS PRESSURE ESTABLISHED IN THE FURNACE VIA A PRESSURE GAS FEED LINE. A CONTACT PROBE (13) IS ARRANGED AT AN ADJUSTABLE HEIGHT IN A PROBE CHAMBER (10) EXTENDING FROM ABOVE INTO THE FURNACE CHAMBER (7) AND OPEN AT ITS LOWER END (8) FOR THE ENTRY OF THE CASTING MATERIAL, WHICH PROBE ON THE OCCURRENCE OF CONTACT SUPPLIES A SIGNAL TO AN ARRANGEMENT (37) FOR CONTROL OF THE GAS PRESSURE FEED FLOW TO THE FURNACE CHAMBER (7). THIS CONTACT PROBE IS MOVABLE ON THE ONSET OF CONTACT IN THE PROBE CHAMBER (10) TO SUCH A HEIGHT THAT DURING THE CASTING PROCESS IS NOT REACHED BY THE LEVEL OF THE LIQUID CASTING MATERIAL. FURTHERMORE, A MEASURING ARRANGEMENT (36) IS PROVIDED FOR MEASURING THE GAS PRESSURE IN THE FURNACE CHAMBER (7), WHICH SUPPLIES THE MEASURED PRESSURE IN THE FORM OF A SIGNAL TO THE ARRANGEMENT (37) FOR CONTROLLING THE PRESSURE GAS FEED FLOW.(FIG 1)