Ngk Insulators, Inc.

Makoto Furutani

Toshio Yamada

Takeshi Tokunaga

Yuji Asai

Keiji Matsumoto

There is disclosed a honeycomb structure in which while sufficiently maintaining a collection efficiency and a bonding strength of a plugging portion, a thermal shock resistance is improved. A plugging portionis formed in the end of each cellof a honeycomb structure, and a gaphaving a size of 20 &#x3bc;m or more is formed between the plugging portionand each partition wall. Moreover, the length of the gapin the axial direction is 50% or more and less than 95% of the length of the plugging portionin the axial direction, the length of the gap in a face vertical to the axial direction is 20% or more and 50% or less of the length of the inner peripheral surface of the cell, and the gaps are formed in at least &#x2153; of the plugging portions

Honeycomb structure and manufacturing method of the same

A method of manufacturing a honeycomb extrusion die has the steps of: preparing a die base metal in which a plurality of intersecting slits are arranged in a front surface thereof and a plurality of raw material feeding holes communicated with the slits are arranged in a back surface thereof; forming a plating layer on the die base metal by means of electrolytic plating; (1) and forming a TiCN layer on the plating layer by means of CVD (chemical vapor deposition); or (2) forming a TiN layer on the plating layer by means of CVD (chemical vapor deposition); and forming a TiCN layer on the TiN layer by means of CVD. In this manner, the honeycomb extrusion die is obtained.

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Komaki, Japan

Makoto Furutani