Patent ID: 6629653
Filing Date: 2003-10-07
Classification: B02C,B03B,B07B,B29B,B29K,Y02W

Abstract:
A process for the dry separation of viscoplastic materials from materials defiberizing under mechanical stress, wherein the materials to be separated are subjected to high acceleration and impact forces in radial, axial and tangential directions, and a mass flow of fibrous material and a mass flow of viscoplastic materials are withdrawn separately, and wherein said viscoplastic materials and said materials defiberizing under mechanical stress are present essentially as composite materials, and only the fibrous material will be defiberized under the action of said forces and separated from the viscoplastic material, the viscoplastic materials being withdrawn in a separate mass flow in an essentially non-shredded state, wherein said high acceleration and impact forces are imparted with a device consisting of a screen basket having borings or outlets in a jacket, allowing the defiberized material to pass through, a rotatable driving shaft being arranged coaxially in an inner zone of the screen basket, with blades being attached to said driving shaft, so that depending on the number of blades, an inclination of the blades and a length of the screen basket only the fibrous material will be defiberized and separated from the viscoplastic material, wherein the screen basket has a cross section in a plane perpendicular to the rotatable driving shaft that is polygonal, and formed by a plurality of planes.