Patent ID: 6193497
Filing Date: 2001-02-27
Classification: B28B,B29C,B29L

Abstract:
A honeycomb extrusion die for extruding a honeycomb structural body, comprising:a plurality of intersecting slits arranged in a front surface thereof, each of the slits being formed by cell blocks;a plurality of raw material feeding holes arranged in a back surface thereof, each of the raw material feeding holes being communicated with the slits; anda round portion formed in corners of each of the cell blocks;wherein each of the cell blocks comprises, a cell block body, a first coating layer which comprises Ni and is formed by electroless plating on the cell block body, and a second coating layer of W.sub.2 C and is formed by chemical vapor deposition on the first coating layer, andwherein a width of each of the slits is 45-120 .mu.m.