Patent ID: 7247012
Filing Date: 2007-07-24
Classification: B29C,Y10T

Abstract:
1. An extrusion head assembly for continuous extrusion of a primary molten polymer in a predetermined shape and a secondary molten polymer in a stripe inserted into said predetermined shape, the primary and secondary molten polymers being supplied from first and second sources, comprising: a) a fixed member for conveying said primary molten polymer in an annular stream axially of an axis of said head assembly, said fixed member including a body element; b) a manifold block disposed against said body element, said manifold block including a distribution channel for receiving and distributing said secondary polymer; c) a wear plate disposed against said manifold block; and d) a die sub-assembly rotatably disposed on said body element for receiving said annular stream of primary molten polymer from said fixed member and extruding said predetermined shape, said die sub-assembly including an extrusion die in contact with said wear plate and having an opening for extruding said predetermined shape and having means for communicating with said distribution channel to receive said secondary polymer therefrom to form said inserted stripe, said sub-assembly further including means for rotating said die about said axis, wherein said sub-assembly includes spring means for axially loading said extrusion die against said wear plate.