Patent ID: 7338271
Filing Date: 2008-03-04
Classification: B29C,Y10T

Abstract:
1. An extrusion head assembly for continuous extrusion of molten polymer in a predetermined cross-sectional shape, the molten polymer being supplied from a source, comprising: a) a fixed member for conveying said molten polymer axially of said head, said fixed member including a body element having a cylindrical well and a first axially-extending surface, said fixed member including a mandrel disposed in said body element and surrounding a tip holder, said body element including a first body section surrounding said mandrel; b) a die sub-assembly rotatably disposed in said well for receiving said molten polymer from said fixed member and extruding said cross-sectional shape, said die sub-assembly including an extrusion die and a second axially-extending surface; and c) a seal element disposed between said first and second axially-extending surfaces and defining a rotatable seal between said fixed member and said die sub-assembly.