Patent ID: 6365080
Filing Date: 2002-04-02
Classification: B05C,B29C

Abstract:
A method of making a mixing element for a static mixer, comprising:providing a split die set having a first die and a second die in axial alignment, each of said dies having an opening forming an extrusion pattern, each said extrusion pattern aligning and mating with the other; rotating said first and second dies so that said extrusion patterns are aligned and mated with each other to allow axial flow of extrusion material through aligned portions of said extrusion patterns; extruding extrusion material through the aligned portions of said extrusion patterns of said first and second dies to form extensions or paddles along the axis of an extruded shape; rotating the aligned first and second dies simultaneously while maintaining alignment during said extruding to provide an angular variation to the extensions or paddles along the axis of the extruded shape; and rotating at least one of said first and said second dies independently so that the extrusion patterns are misaligned to prevent the flow of extrusion material except through the center of the extrusion patterns.