Parkhurst & Oliff
Method of manufacturing a ceramic honeycomb structural body and an extrusion die therefor
 Disclosed herein is a method of manufacturing a ceramic honeycomb structural body and a die for extruding a ceramic honeycomb structural body wherein the die includes molding slits having a profile corresponding to a sectional profile of a ceramic honeycomb structural body and ceramic raw batch material supply holes through which a ceramic raw batch material is supplied to the molding slits. The pitch ratio between a short side and a long side of the molding slits is substantially 1:.sqroot.3. 
NGK Insulators, Ltd.
B Y
B28B Y10T
inventional additional
Tadaaki Kiminari
Matsuhisa Kato