Patent ID: 6189363
Filing Date: 2001-02-20
Classification: B21C,H01L,Y10T

Abstract:
A molding tool for making a cooling device, said molding tool comprising:a lower mold provided with a plurality of through holes;a lower mold housing provided with a molding hole and disposed on said lower mold such that said molding hole is corresponding in location to said through hole;a punching head fastened with the upper mold seat of a punching machine such that said punching head is corresponding in location to said molding hole of said lower mold housing whereby said punching head is provided in a bottom edge of a periphery thereof with a plurality of cavities and ribbed slots; andan urging plate provided with an opening with a shape corresponding to a cross-sectional shape of said punching head, said urging plate being disposed under the upper mold seat of the punching machine such that said opening is corresponding in location to said punching head so as to enable said punching head to move through said opening, said urging plate being further provided with at least two insertion slots located in two opposite sides of said opening;said molding hole of said lower mold housing being intended to hold therein a blank for forming the cooling device by extrusion molding by said punching head which is driven into said molding hole to extrude the blank such that a plurality of cooling fins are formed in said through holes of said lower mold, and that said cavities, said ribbed slots, and said insertion slots are filled with the blank to facilitate the releasing of the cooling fins from said molding tool.