Heat sink and process of manufacture

摘要

A heat sink and method of manufacture is described. In the preferred embodiment, an array of tubes are extruded from a block of conductive metal, such as aluminum. A series of plugs or pins are extruded in a first stage, and the plugs are reverse extruded by tooling pins to form tubes of considerable or varying length, integral with the base plate. The tube closed ends are punched so as to form holes through the base plate which has a groove crossing pattern aligned with the holes to provide an air convection flow path. The tubes may be assembled to a base plate as separate elements, and a channel member can also be utilized to provide flow passages extending to each tube.