MULTI-LAYER HEAD FOR EXTRUSION DIE ASSEMBLY
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Apr 26, 2013
filing date -
Apr 26, 2012
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Abandoned
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Abstract
A multi-layer extrusion die assembly includes a body, a main bore extending longitudinally through the assembly, a core tube, and a plurality of dies. The extrusion die assembly is configured to receive an input stream of material and divide the input stream into a plurality of material streams. Each die is configured to receive one or more of the material streams and to form a single continuous layer of material about the core tube. The layer formed by each die has one or more weld lines running longitudinally along the layer. The dies are arranged along the core tube such that a plurality of concentric layers of material is formed around the core tube. Each die is rotated axially with respect to adjacent dies such that the weld lines of the layer formed by one die.
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