Patent ID: 7513676
Filing Date: 2009-04-07
Classification: B29C,Y10T

Abstract:
1. An extruder screw, comprising: a generally cylindrical shaft; at least one thread extending from the periphery of the shaft, the thread having a leading face, a trailing face, and a fighting crest, and the fighting crest being generally parallel to the periphery of the shaft; a plurality of rows of wear-resistant tiles, each tile having a wear surface and an opposite binding surface, and each tile having a plurality of edges, wherein the binding surface of each tile is adapted to be bonded to the thread; a first row of tiles that are secured to the leading face of the thread, wherein at least one edge of each tile in the first row is generally aligned with the fighting crest of the thread; and a second row of tiles that are secured to the fighting crest of the thread, wherein at least one edge of each tile in the second row is generally aligned with the wear surface of at least one tile in the first row.