Patent ID: 6656594
Filing Date: 2003-12-02
Classification: B29C,B32B,E04C,E04D,Y10T

Abstract:
Method to produce shaped multi-layer plates, comprising super-imposed layers, the method comprising:individually extruding raw materials comprising powder, granules, or crystals, in liquid form, to form a plurality of separate layers, each layer being mono-component or multi-component, superimposing the separate layers, co-extruding the superimposed layers through a co-extrusion head with plane lips to form a continuous flat multi-layer plate with a plane surface, subjecting the flat multi-layer plate emerging from the co-extrusion head to a calendering pass to provide thermal, chemical and dimensional stabilization, subjecting the flat continuous multi-layer plate emerging from the calendering pass to a pass of thermal adjustment and shaping, and cooling and shearing to size the shaped multi-layer plate emerging from the pass of thermal adjustment and shaping so as to obtain shaped multi-layer plate of the desired length.