Document Type and Number:
Japanese Patent JPS6140523
Kind Code:
B2
Abstract:
To provide improved overall fin efficiency and high cell density, a ceramic honeycomb structural body has cells of a rectangular section in which the pitch ratio between the short side and the long side of the cells is substantially 1:3. Such a body can be made using an extrusion die (1) having rectangularly intersecting molding slits (2) corresponding to a section of the ceramic honeycomb structural body and material supply holes (3) through which the raw material is supplied to the molding slits (2). The supply holes (3) can be in an equilateral hexagonal array. The die may have a plate 6 with holes (7) which each supply three of the supply holes (3) for the molding slits (2).
Inventors:
MATSUHISA TADAAKI
KATO KIMYA
KATO KIMYA
Application Number:
JP18688083A
Publication Date:
September 10, 1986
Filing Date:
October 07, 1983
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
F28D19/04; B28B3/20; B28B3/26; F28F5/02