SPRUE PIN AND DIE CASTING USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a technology that achieves stable manufacture of a sprue pin formed from steel and copper or a copper alloy.SOLUTION: In a sprue pin 40, a part including a front part (f) is formed from steel (St), and a part surrounding an entire perimeter of a refrigerant passage 41 and a part forming a through-hole 42 are at least partially formed from copper or a copper alloy (Cu). A cavity (C) is formed in a part of its bonded surface.SELECTED DRAWING: Figure 3