Patent ID: 7670644
Filing Date: 2010-03-02
Classification: B01J,B28B,B29C,B29L,C23C

Abstract:
1. A method for manufacturing a die for extrusion-forming a honeycomb structure, which comprises: forming a substrate layer, by a process including electroless plating, on a die base provided with ceramic puddle introducing holes and slits in communication with the ceramic puddle introducing holes; pickling surface of the formed substrate layer with dilute acid; and forming a surface layer on the substrate layer by chemical vapor deposition (CVD) so as to provide slits of a specified width, wherein the formation of the surface layer by chemical vapor deposition (CVD) is carried out while feeding a reaction gas consisting of WF the surface layer is made of tungsten carbide particles which are 5 μm or less in average particle diameter and contain W and the W/C molar ratio of the reaction gas is 0.6 to 3.