Patent ID: 6299813
Filing Date: 2001-10-09
Classification: B28B,B29C,B29L

Abstract:
A honeycomb extrusion die comprising a die body incorporating an inlet face, a discharge face opposite the inlet face, a plurality of feedholes extending from the inlet face into the die body, and an intersecting array of discharge slots extending into the body from the discharge face to connect with the feed holes, the intersecting array of discharge slots being formed by the side surfaces of a plurality of pins bounded by the slots and extending into the die body from the discharge face, wherein a plurality of the pins include one or more multi-textured side surfaces, said side surfaces including at least two surface regions differing in surface finish from each other, wherein the two surface regions include a first surface region having a surface roughness below 0.5 micrometers (20 microinches) and a second surface region having a surface roughness above 0.75 micrometers (30 microinches).