Patent ID: 9102086
Filing Date: 2015-08-11
Classification: B29C,B32B,Y10T

Abstract:
1. A method of manufacturing an elongated article, the method comprising the steps of: extruding a first layer plastic resin having a periphery which forms at least a portion of a wall of an elongate member having a hollow internal cavity; dispensing a plurality of heat expandable particles into a fill region of the hollow internal cavity while the elongate member is still connected to an extruder and moving along an extrusion axis; expanding the particles with a heated expansion fluid which is introduced into an expansion region of the cavity while the elongate member moves downstream of the fill region to form an in-situ foam core which is thermally bonded to the wall of the elongate member; and supporting the moving elongate member while the in-situ foam core cools to form the elongate article.