Hitachi Metals, Ltd.

Other

Hino Motors, Ltd.

Shinya Tokumaru

Hirohisa Suwabe

Yasuhiko Otsubo

Shunji Okazaki

Toshitaka Ishizawa

Hisaki Torisaka

Hiroshi Funabashi

Makoto Tsujita

Keiichi Nakagome

Toyohide Kumagae

A method for producing a ceramic honeycomb filter having predetermined plugs comprising immersing the end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that the plugging material slurry is introduced into the end portions of the predetermined flow paths, and removing plugging material protrusions formed in the flow paths that should not be plugged.

Production method of ceramic honeycomb filter

A method for producing a ceramic honeycomb filter by immersing an end surface of a ceramic honeycomb structure having a lot of flow paths partitioned by cell walls in a plugging material slurry in a container to introduce the plugging material slurry into the predetermined flow paths to form plugs, and taking the ceramic honeycomb structure provided with the plugs out of the container horizontally.

Method for producing ceramic honeycomb filter

A method for producing a ceramic honeycomb structure comprising applying a coating material to an outer peripheral surface of the ceramic honeycomb body to form an outer peripheral wall, the thickness of the coating material applied being determined from the outer diameter of the ceramic honeycomb body and the drying shrinkage ratio of the coating material, such that the outer diameter of the dried ceramic honeycomb structure is within a target outer size&#xb1;1.4 mm.

Method for producing ceramic honeycomb structure

A method for producing a honeycomb filter from a honeycomb structure having large numbers of flow paths partitioned by cell walls, comprising inserting a tubular member into each of the flow paths, and injecting a plugging material into each of the flow paths from the tubular member to form a plug in each of the flow paths at a position separate from the end surface of the honeycomb structure, the tubular member having an outer diameter that is 40-90% of the opening size of the flow path, the plugging material comprising at least a ceramic material having a maximum particle size that is 85% or less of the inner diameter of the tubular member, and an average particle size of 1 &#x3bc;m or more.

Production method of honeycomb filter and honeycomb filter

A ceramic honeycomb filter comprising a sintered ceramic honeycomb body having porous partition walls defining flow paths, and plugs formed in predetermined flow paths for removing particulate matter from an exhaust gas passing through the porous partition walls, the sintered ceramic honeycomb body being formed by a cordierite-based ceramic material, at least part of the plugs comprising ceramic particles and an amorphous oxide matrix formed from colloidal oxide.

Growing community of inventors

Miyako-gun, Japan

Shinya Tokumaru