Patent ID: 8580187

Claim:
A melt supply pipe for connecting a melting furnace to a plunger sleeve of a die casting machine in aluminum die casting, said pipe comprising: a melt supply pipe body composed of an inner ceramic pipe and an outer steel pipe, said outer steel pipe having a Ni alloy layer formed over the inner circumferential surface, and TiC particles attached to the surface of the Ni alloy layer, wherein grooves are formed at both ends of the melt supply pipe body, each groove forming an annular space overlapping the boundary between the outer circumferential surface of the inner ceramic pipe and the inner circumferential surface of the outer steel pipe, and a fibrous sheet of an inorganic material inserted into each of the annular grooves, wherein the fibrous sheet has the property of thermally expanding in the thickness direction, and is inserted into the annular groove and extends over the entire circumference of the groove, so that the fibrous sheet will expand in the radial direction of the melt supply pipe.