| 摘要 |
A honeycomb extrusion die 1 for extruding a honeycomb structural body, having: a plurality of intersecting slits 2 arranged in a front surface thereof, each of the slits 2 being formed by cell blocks 3; a plurality of raw material feeding holes 4 arranged in a back surface thereof, each of the raw material feeding holes 4 being communicated with the slits 2; and a round portion formed in corners 3a of each of the cell blocks 3; is disclosed. In the honeycomb extrusion die 1, each of the cell blocks 3 includes, a cell block body 11, a first coating layer 12 formed by electroless plating on the cell block body 11, and a second coating layer 13 formed by chemical vapor deposition on the first coating layer 12, and a width of each of the slits is 45-120 mum.
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