BI -MATERIAL DIE AND METHOD FOR EXTRUDING ABRASIVE EXTRUDABLE MATERIALS

摘要

An article comprising; a) a die core (10) having plurality of flow paths adapted to flow extrudable material to a plurality of slots (12) and around a plurality of pins (11) so as to form a honeycomb structure from the extrudable material, the honeycomb structure having a skin about its outer surface in the extrusion direction, the slots (12) comprise wall slolts(12) for forming walls of the honeycomb structure and skin slots (16) disposed about an outer periphery of the die core (10) for forming the skin arond the honeycomb structure, the die having an extrusion entrance surface (24) and an extrusion exit surface (13); b) a mounting plate (20) adapted to hold the die core (10) in an extrusion system having an opening (21) adapted to allow the extrudable material passed through the die core (10) to exit the die core (10), an outer portion adapted mount and hold the die core (10) in place, and a flange (22) about the periphery of the opening (21) which seats the die core (10) and is disposed about the outer periphery of the extrusion exit surface (13) of the die core (10), wherein the inner surface (23) of the mounting plate (20) is disposed to partially form the skin slots (16) adapted to to allow extrudable material to flow from the skin slots (16) to form the skin about the outer surface of the honeycom structure; wherein the die core (10) and the mounting plate (20) are comprised of different materials having different wear properties.