Extrusion die construction and its method of manufacture.

摘要

In accordance with a preferred embodiment of the invention, a monolith extrusion die (10) is formed by a plurality of individual tube elements (12) bonded together as a tube stack (50) defining a plurality of feed holes (30) for extrudable material and reference guides (24) for a plurality of individual shaping teeth (18), each having a root segment (22) located in a reference guide (24) and each having a shaping head (20) spaced apart from adjacent shaping heads (20) to form intersecting rows of extrusion slots (32,34) having a shape corresponding to the monolith formed by extrudable material directed from the feed holes (30) being extruded between the shaping teeth (18). The method of the present invention includes stacking individual tubes (12) into a tube stack (50) with reference guides (24) therein and with feed holes (30) therethrough, and locating a plurality of individual shaping teeth (18) in the tube stack (50) for forming a transition path (28) for flow of extrudable material from the feed holes (30) whilst forming intersecting rows (32,34) of extrusion slots shaped to correspond to the monolithic honeycomb structure formed by passage of extrudable material therethrough.