Patent ID: 9616482
Date: 2017-04-11
CPC Classifications: B21D,B21J,C21D,F28D

Claim:
1. Hot metal forming apparatus comprising: a pair of dies, at least one of said dies movable relative to the other die between an open and a closed position, said dies dimensioned to receive a heated metal sheet therebetween when said open position, said dies having facing metal forming surfaces, configured to stamp the heated metal sheet received between the dies into a shape of the facing metal forming surfaces when the dies are in the closed position, a plurality of elongated heat pipes mounted in at least one die of the pair of dies, each said heat pipe having a first end positioned adjacent one of said metal forming surfaces and a second end spaced from said metal forming surfaces, each said heat pipe having a casing which forms a closed interior chamber extending from the first end to the second end that is fluidly separated from the closed interior chambers of the other heat pipes, and a liquid which partially fills each said chamber, wherein each heat pipe is configured to transfer heat from the metal forming surfaces to transfer heat from the stamped metal sheet.