Extrusion die for forming thin-walled honeycomb structures

Abstract From the Canadian patent

An extrusion die for extruding a honeycombshaped structure having rectangular channels. The die is formed of a hard rigid material, preferably metal, and includes a body plate and an abutting face plate. The outlet face of the body plate is brazed to the inlet face of the face plate. The body plate has a plurality of slightly staggered primary feed holes, the outlet ends of each communicating with an associated feed reservoir, the latter each defined by a recess or depression in the inlet surface of the face plate. Each feed reservoir communicates with the inlet ends of three associated secondary feed holes. The outlet surface of the face plate integrally carries a plurality of intersecting …