Ngk Insulators, Inc.

Honda Giken Kogyo Kabushiki Kaisha

Yukihito Ichikawa

Toshio Yamada

Koichi Ikeshima

Minoru Machida

Eiji Ito

Makoto Miyazaki

Yasushi Noguchi

Yoshiyuki Kasai

Yasushi Kato

Takahiro Kondo

Toshihiko Hijikata

Takeshi Tokunaga

Sadaaki Hirai

Koichi Ito

Tatsuhiko Hatano

Tatsuyuki Kuki

Masato Ogawa

Yoshiro Ono

Koji Fushimi

Shinichi Tosa

Masahiro Shirai

Tomomi Sugiyama

Masayasu Ishikawa

Masayoshi Miwa

Masahiro Masuda

Mitsuru Miyamoto

Shinya Mori

Takeshi Naito

There is provided a ceramic honeycomb structure usable as a catalyst substrate and being improved warm-up properties and thermal insulation properties, and being excellent in exhaust gas purification performance; by employing larger heat capacity and larger thermal conductivity compared with a material of the partition walls in at least one of insides and surfaces of the respective partition walls.

Ceramic honeycomb structure

There is disclosed a manufacturing method of a plugged honeycomb structure so that the plugged honeycomb structure for use in a filter or the like having reduced deposits deposited on an end surface of the structure can easily be manufactured with low cost and so that a plugging depth of a slurry-like plugging member at an outer peripheral portion of the honeycomb structure can easily be set to be uniform. In the manufacturing method of the plugged honeycomb structure in which plugging portions are formed at opening end portions of predetermined cells on one side of a cylindrical honeycomb structure including a plurality of cells separated from one another by porous partition walls, constituting channels of a fluid and formed in a honeycomb-like shape, plugging members which are formed into a predetermined shape and which are to be inserted into cell passages to be plugged include a plastic material having viscosity and fluidity.

Manufacturing method of plugged honeycomb structure

A honeycomb structureof the present invention includes: a cylindrical cell structurehaving porous partition walls and a plurality of cells separated and formed by the partition walls and functioning as fluid passages, and an outer peripheral coat layerdisposed so as to cover the outer periphery of the cell structure, and the outer peripheral coat layerhas an outer peripheral coat portiondisposed so as to cover the outer periphery of the cell structureand a protruding portion protruding outside from an end faceof the cell structureand disposed so as to cover the outside portion on the end faceof the cell structure. In the honeycomb structureof the present invention, the outer peripheral coat layeris effectively inhibited from being damaged and peeled.

Honeycomb structure and method for manufacturing same

Using a slurry filler having a container having an opening top and storing plugging slurry and a cover attached to the opening top of the container and having a flat upper face and through-holes communicating the inside and the outside of the container and being disposed to correspond to cells to be plugged on an end face of the honeycomb structure, the honeycomb structure is set on the cover by positioning so that opening ends of cells to be plugged of the honeycomb structure match positions of through-holes of the cover, and the plugging slurry stored in the container is filled inside opening ends of cells to be plugged through the through-holes to form the plugged portions. According to this manufacturing method, a plugged honeycomb structure having no defects can be manufactured at low costs for a short time without restriction on operation circumstances with less industrial waste.

Method for manufacturing plugged honeycomb structure

Plugged honeycomb structure

The present invention provides a honeycomb structure in which a coating layer is firmly secured to an outer wall forming a cell structure so that separation of the coating layer is effectively prevented. A honeycomb structure according to the present invention includes a cell structure having a porous partition wall partitioning a plurality of cells serving as fluid channels and an outer wall integrally formed with the partition wall, and a coating layer disposed on the surface of the outer wall forming the cell structure, a depression/protrusion portion and/or a cut portion formed by partially removing the surface of the outer wall being formed on the surface of the outer wall, and the coating layer being disposed to cover the surface of the outer wall.

Honeycomb structure and method of producing the same

There is provided a honeycomb structure including: porous partition walls separating and forming a plurality of cells extending between two end faces, and an outer peripheral wall formed unitarily with the partition walls. The cells include outermost peripheral portion partial cells each locating in an outermost peripheral portion of the honeycomb structure and having an incomplete cell cross section, a part of which is brought into contact with the outer peripheral wall, and complete cells each having a complete cell cross section other than the outermost peripheral portion partial cells. The complete cells and the outermost peripheral portion partial cells having plugging portions formed on one end portion so that an entire end face of the honeycomb structure shows a checkerwise plugging pattern, and the depth of the plugging portions in the outermost peripheral partial cells is smaller than that of the plugging portions in the complete cells.

A tubular honeycomb structurecomprising partition wallswhich define and form a plurality of cellseach functioning as a fluid passage extending from one end faceof honeycomb structure to other end face, wherein the areas of the sections of the individual cells(cell sections) normal to the flow direction A of fluid are so made as to be approximately equal to each other over a given range of the center of each cell and its vicinity in the fluid flow direction A and to gradually decrease or gradually increase at each cell end of at least one end faceof honeycomb structure in the fluid flow direction A. This honeycomb structure can reduce the incoming loss and outgoing loss of a fluid such as exhaust gas or the like and can show a lower pressure loss.

Honeycomb structure and method of manufacturing the same

There are provided a honeycomb structure capable of suppressing a decrease in isostatic strength attendant on the thinning of the honeycomb structure, a honeycomb structure converter thereof, and a method of manufacturing the honeycomb structure. There is provided a honeycomb structurehaving a number of cellspartitioned by partition wallsand extending to a axial direction. There are the honeycomb structure wherein a thickness (TY) of a partition walls (Y) whose longitudinal direction is one direction (Y-direction) in a section perpendicular to the axial direction of the honeycomb structureis greater than that (TX) of a partition walls (X) whose longitudinal direction is the other direction; and a honeycomb structure converter thereof. There is provided a method of molding the above-mentioned honeycomb structure, wherein the honeycomb structure is extrusion molded such that the Y-direction is a direction of gravity.

High strength honeycomb structure, method of molding the same, and honeycomb structure converter

An assembling method for an assembly is provided: the assembly comprising a cell structure () housed and held in a metal vessel () via a compressible material having a cushioning property () by arranging it between outer periphery of the structure () and the vessel () in a compressed state with applying a mounting pressure to the structure () via the material () to hold the structure () in the vessel (). Information regarding outside dimension of the structure () and/or inside dimension of the vessel () being marked on their surfaces prior to the start of assembly, and the information is read, and a cell structure () and a metal vessel () are selected based on read information in assembly to achieve a proper holding condition therebetween. Regardless of variations in external dimension of the structure, etc. constituting the assembly, the minimization thereof, and proper holding state may be achieved easily without causing a fracture of the structure, etc.

Assembling method using marked information and assembly assembled by said assembling method

There are provided a honeycomb structure and a method of manufacturing the honeycomb structure, the honeycomb structure including a honeycomb structural part, which has partition wallsfor forming a plurality of cellspartitioned in a honeycomb shape and for forming recesseson an outer peripheral surface, and an outer wall partdisposed on the outer peripheral surface of the honeycomb structural part, wherein voids are formed in the recessesbetween the outer wall partand the honeycomb structural part. The honeycomb structure and the method of manufacturing the same can suppress the reduction of a temperature increasing speed while suppressing a decrease of mechanical strength and further can suppress the occurrence of cracks.

Honeycomb structural body and method of manufacturing the same

A honeycomb structure has a cell structure sectionan outer circumferential wall section. The cell structure sectionincludes a first partition wall group having partition wallspositioned in parallel and a second partition wall group having partition wallswhich intersect the partition walls of the first partition wall group at right angles and are positioned in parallel. In this honeycomb structure, the partition wall intervals of the partition wallsandof each partition wall group positioned in parallel are varied stepwise in at least a part of the cell structure section, and all the partition wallsandhave such a ratio of the cell side length to the partition wall thickness that the partition wall can withstand pressure during canning. The honeycomb structure has increased isostatic strength and thermal shock resistance and can be manufactured at low cost.

Honeycomb structure and die for forming honeycomb structure

An undulated-wall honeycomb structure () has multiple cell passages () with mutually parallel passage directions. With this undulated-wall honeycomb structure (), intersections () between walls () partitioning the cell passages () are formed at cross-sections perpendicular to the cell passages () and positioned systematically maintaining a predetermined pitch, and also the wall face portions () of the walls () excluding the intersections () are formed with undulated shapes in both the cell passage direction and the cross-section direction perpendicular to the cell passage direction. According to this undulated-wall honeycomb structure, advantages such as improved exhaust gas purification capabilities and catalyst capabilities, improved mechanical strength for canning, and further improved heat-resistant shock properties can be obtained.

Undulated-wall honeycomb structure and manufacturing method thereof

A honeycomb filter is provided comprising a honeycomb structure having a large number of through channels formed in an axial direction and partitioned by porous partition walls, each of the through channels having a first end at one end of the filter and a second end at an opposite end of the filter, wherein a first group of the through channels are plugged only at the first end, and a second group of the through channels are not plugged. A honeycomb structure is further provided having through channels with a relatively large frontal area and through channels with a relatively small frontal area, and wherein all the through channels with a relatively large frontal area are the first group, and all the through channels with a relatively small frontal area are in the second group. A honeycomb filter is also provided with a catalyst component carried on a surface of the partition walls and/or a surface of pores present in an inside of the partition walls.

Honeycomb filter and exhaust gas purification system

There is provided a cell structure, where the outer wall portion has high heat-insulating ability, the cell structural portion has a high temperature rise rate, and a temperature distribution is more uniform, and a method for manufacturing the cell structure. The cell structureincludes: a cell structural portionhaving partition walls forming a plurality of cells extending from one end face to the other end face, and an outer wall portiondisposed on an outer peripheral surface of the cell structural portionThe outer wall portionhas at least a porous layer having a porosity of 40% or more or a porous layer having a hollow body. The manufacturing method can easily manufacture the cell structure.

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Nagoya, Japan

Yukihito Ichikawa