Patent ID: 6379609
Filing Date: 2002-04-30
Classification: B22D

Abstract:
A process for controlling the metering of molten metal in a vacuum die-casting machine, wherein the vacuum die-casting machine includes a vacuum valve, the molten metal is held in a holding furnace and the molten metal is sucked into a casting chamber, the process comprising the steps of:measuring at least one actual value of the molten metal inside the holding furnace; comparing the measured actual value with a desired value; and determining at least one optimum control parameter based on the comparison result to achieve a high level of metering accuracy; wherein the metering is effected by a pressure reduction in the vacuum die-casting machine and by controlling the vacuum valve and wherein the at least one actual value includes a value indicating a filling level of the molten metal in the holding furnace and a value indicating a weight of the molten metal in the holding furnace.