Patent ID: 6708752
Filing Date: 2004-03-23
Classification: B21C,B22D

Abstract:
An injector for a molten metal supply system, comprising:an injector housing configured to contain molten metal; a molten metal supply source in fluid communication with the housing; a liquid chamber positioned above and in fluid communication with the housing, with the liquid chamber containing a liquid chemically resistive to the molten metal contained in the molten metal supply source; and a piston reciprocally operable within the housing, with the piston movable through a return stroke allowing molten metal to be received into the housing from the molten metal supply source and a displacement stroke for displacing the molten metal from the housing to a downstream process, and with the piston having a pistonhead for displacing the molten metal from the housing, wherein the liquid chamber is in fluid communication with the housing such that during the return and displacement strokes of the piston liquid from the liquid chamber is located about the pistonhead and between the molten metal received into the housing and the liquid chamber.