Extrusion die for protrusion and/or high cell density...

Details Extrusion die for protrusion and/or high cell density... Extrusion die for protrusion and/or high cell density...

B - Operations, Transporting

29

C

25/25

B29C 47/30 (2006.01) B28B 3/20 (2006.01)

Patent

CA 1318485

Abstract Secondary discharge slots are cut into the face of newly made or used extrusion dies such that the secondary discharge slots communicate transversely and longitudinally with primary discharge slots but do not communicate with the feed holes. The novel extrusion die arrangement is set forth for the production of ceramic honeycomb structures which produce a greater number of cells per square inch, protrusions on the cell walls, or a combination of both dependent upon the Primary Slots' Volume to Secondary Slots' Volume ratio. The secondary discharge slots can produce honeycomb substrates with much greater surface areas, using an extrusion die with a significantly reduced number of feed holes and a greater number of discharge slots.

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