Patent ID: 9694529
Date: 2017-07-04
CPC Classifications: B28B,B29C,B29K,B29L,B44F,C11D,Y10T

Claim:
1. An extrusion die comprising: a pair of molds respectively having rectangular extrusion holes for allowing extrudates forming an inner layer to pass through the extrusion holes; and surface layer forming parts having flow paths which are oppositely formed on contact face of the molds in such a way as to keep a predetermined gap and formed in a top and bottom asymmetrical manner for injecting other extrudates supplied, the surface layer forming parts serving to form a surface layer having different wood patterns on the outer circumference of the inner layer, wherein each of the flow paths comprises: a first injection portion formed on one side of an upper part based on the vertical center of the extrusion hole, and a second injection portion formed on the other side below the extrusion hole and formed top-bottom asymmetrically with the first injection portion.