Sumitomo Chemical Company, Limited

Hajime Yoshino

Teruo Komori

Kentaro Iwasaki

Kousuke Uoe

Tatsuro Kawauchi

Masayuki Narumi

Akiyoshi Nemoto

A cylindrical honeycomb structurehas a partition wallforming A channelsand B channels. The A channelsare open at a first end surfaceand closed at a second end surface. The B channelsare closed at the first end surfaceand open at the second end surface. The B channelsinclude a first B channeland a second B channelextending substantially in parallel to each other. The A channelsinclude first A channels, which surround the first B channel at the first end surface, and second A channels, which surround the second B channel at the first end surface. The partition wallhas a first group partition wall, which separates adjacent channels of the first A channelsand the second A channelsfrom each other.

Honeycomb structure

The extrusion-molding device of the invention includes a flow passage for transporting a paste raw material composition; a screw provided at an upstream side of the flow passage to knead the raw material composition and transport it to a downstream side; a die provided at a downstream side of the flow passage to extrude a molded body composed of the raw material composition therefrom; a resistive tube for connecting the flow passage and the die; and a current plate provided between the screw and the die. The current plate comprises a plurality of through-holes that penetrate from a upstream end side to a downstream end side, and an opening of the through-hole on the upstream end side has a larger open area than an opening on the downstream end side.

Extrusion-molding device and method for producing molded body using same

The columnar honeycomb structureextending along a central axis CL, including a first end surfaceand a second end surface, and a partition wallforming a plurality of first flow passages Ra and a plurality of second flow passages Rb, in which the first flow passages Ra are opened at the side of the first end surfaceand plugged at the side of the second end surface, the second flow passages Rb are plugged at the side of the first end surfaceand opened at the side of the second end surface, and the honeycomb structure includes a circular row W formed by arranging the second flow passages Rb adjoining and partitioned by the partition wallin a circular pattern.

Particulate filter

The extrusion-molding device of the invention is for producing a green honeycomb molded body with a cell structure, and the device includes a housing, a screw, a die with slits, a resistance tube and a fragmenting board having through-passages through which a raw material composition passes from the upstream end side to the downstream end side. The through-passages of the fragmenting board have upstream channels composed of a plurality of flow passages extending downstream from the upstream end side, and downstream channels extending up to the downstream end side and having flow passage cross-sectional shapes different from those of the upstream channels.

Extrusion molding apparatus and manufacturing method for green honeycomb molded body using same

The present invention aims to provide a honeycomb structure capable of preventing a plugging failure and forming cracks by heat shock which are caused by a cell having a small cross-section. The present invention is a honeycomb structure used for a filter for purifying an exhaust gas discharged from an internal combustion engine, wherein

The invention is to provide a process for producing an aluminum titanate-based ceramics body, wherein, as a regenerated starting material, a fired body recovered in a production process for an aluminum titanate-based ceramics body is used and the aluminum titanate-based ceramics body excellent in a mechanical strength and in a thermal characteristics such as low thermal expansion and heat resistance can be obtained. The invention provides a process for producing an aluminum titanate-based ceramics body using a fired ceramics body recovered in a production process for an aluminum titanate-based ceramics body, comprising the following steps: a step of preparing a pulverized product having a median particle diameter of 100 &#x3bc;m or less from the fired ceramics body; a step of preparing a regenerated clay containing the pulverized product and water; a step of shaping the regenerated clay to form a shaped body; and a step of firing the shaped body.

Growing community of inventors

Niihama, Japan

Hajime Yoshino