Patent ID: 6251323
Filing Date: 2001-06-26
Classification: B29C,B29L

Abstract:
A method of completely encapsulating an insert or core in plastic material characterized by placing said insert or core in and supporting it on one side of a mold tool having a core side and a cavity side whose perimeters are greater than the perimeter of said insert or core and having means to confine plastic flow within said mold tool while permitting plastic to flow around and cover the periphery of said core or insert, introducing a first charge of plastic between said insert or core and the other side of said mold tool, distributing said plastic material under pressure with said plastic in molten state to coat the upper side and periphery of said insert or core with a plastic layer, separating said mold sides while said plastic is still hot to utilize the adhesive properties of said plastic layer to fix said insert or core to said other mold side to lift said insert or core off said one mold side, and while said plastic from said first charge is still hot introducing a second charge of plastic into said one mold side underneath said insert or core, and distributing said second plastic charge under pressure with said plastic of said second charge in a molten state to coat the underside of said insert or core with a plastic layer and to unite with the hot plastic from the first charge covering the periphery of said core or insert to provide on cooling a completely continuous plastic layer completely encapsulating said insert or core.