Patent ID: 6516867
Filing Date: 2003-02-11
Classification: B22D,F28F,H01L

Abstract:
A heat sink manufacturing method comprising the steps of:providing a die casting machine which has a cavity for a heat sink to be formed, said cavity consisting of a first cavity for a base and a second cavity for heat-radiating fins of the heat sink, and said die casting machine including a fixed mold, a movable mold that is movable in a first direction, and a slide mold that is movable in a second direction that is substantially perpendicular to said first direction; arranging molds of said die casting machine such that said first cavity for the base is formed by said fixed mold and said movable mold that is movable in the up-down direction, and said second cavity for the heat radiating fins is formed by said fixed mold, said movable mold that is movable in the up-down direction, and said slide mold; injecting molten metal into said first and second cavities and cooling said metal to a prescribed temperature whereby the base and the heat-radiating fins are formed in the first and second cavities respectively; and moving said movable mold up-down and moving said slide mold in a direction that is substantially perpendicular to the direction of movement of said movable mold, to thereby manufacture the base and heat-radiating fins and in their entirety.