Patent ID: 9067351
Filing Date: 2015-06-30
Classification: B29C

Abstract:
1. An extrusion die comprising a flow channel providing fluid communication from a flow channel entrance to a flow channel exit orifice, wherein said flow channel comprises a transverse flow-providing manifold, and a downstream channel portion including said exit orifice, and wherein said manifold spans a width; wherein along the manifold width, said manifold comprises opposing transition surfaces having an angular relationship to each other and forming a transition zone, wherein said opposing transition surfaces intersect surfaces of said downstream channel portion; and wherein along a portion of said manifold width, said transition zone comprises a varying included angle, and the manifold cross-section changes related to change of said varying included angle, and said manifold comprises a constant geometric parameter selected from a constant tangent length, a constant length, a constant height, a constant tangent height, and combinations thereof.