Patent ID: 6193919
Filing Date: 2001-02-27
Classification: B29B,B29C,B29K,Y02W

Abstract:
In combination with a mixer/extruder designed to mix, heat and extrude a mixture of shredded plastic material and shredded fibrous material, the heated mixture being extruded in the form of a continuous beam from an extrusion nozzle, the improvement which comprises a first matrix spaced horizontally downstream from the nozzle for receiving the beam therein and a second matrix spaced horizontally downstream from the fist matrix for receiving the beam therein, the first matrix having moveable walls which reciprocate in a horizontal direction against the outer surface of the beam, the second matrix having moveable walls which reciprocate in a horizontal direction against the outer surface of the beam, the moveable walls of both matrices having inner surfaces which together form a shape corresponding to the outer surface of the beam, the walls of both matrices completely surrounding the beam as it passes through each matrix, the second matrix having means for conducting cooling water therethrough for cooling the beam as it passes through the second matrix, wherein the moveable walls of the first matrix move in concert with the moveable walls of the second matrix.