METHOD OF MANUFACTURING FERRULE FOR MOLDING HONEYCOMB STRUCTURE AND FERRULE FOR MOLDING HONEYCOMB STRUCTURE

摘要

A method of manufacturing a ferrule for molding a honeycomb structure and the ferrule for molding the honeycomb structure. The honeycomb structure comprises a ferrule base body having two faces. Honeycomb-shaped slits (5) are formed in one of these two faces, and a rear hole communicating with the slits (5) for leading a molding material therein is formed in the other. At least the slit parts of the ferrule are formed of a cemented carbide. After the slits (5) are molded by grinding or electrical discharge machining, a discharge electrode (40) of square shape in cross section is disposed near the crossing part of the slits (5), and the electrical discharge machining is performed from the upper surface part of the slits (5) in the depth direction of the slits.