Ngk Insulators, Inc.

Jun Fujita

Takahisa Kaneko

Naoshi Masukawa

Takashi Harada

Yukihisa Wada

Sho Tanosaki

Keiichi Fukuda

Shugo Tohyama

A method of manufacturing a honeycomb structure having honeycomb segments, which includes a masking step (S) of attaching masking materials () to both end surfaces () of the honeycomb segments (), a stacked body bonding step (S) of bonding the honeycomb stacked body () by bonding the plurality of honeycomb segments () together while interposing adhesive layers therebetween, an adhesive layer drying step (S) of integrally fixing the honeycomb stacked body () by heating and drying the adhesive layers, a masking material separating step (S), of separating the masking materials (), and a grinding step (S) of grinding an outer peripheral portion of the honeycomb stacked body () into a predetermined shape.

Method of manufacturing honeycomb structure

There is provided a device for bonding ceramic structural bodies. In the state in which a set of ceramic structural bodies provided with a bonding agent between bonding surfaces and provided with elastic sleeves disposed on a peripheral surface of the set of the structural bodies are placed in a tubular container with an elastic sheet disposed between the elastic sleeves and the tubular container, the device is able to charge a hydrostatic pressure medium between the tubular container and the elastic sheet to press and bond the structural bodies. By bonding the ceramic structural bodies with the device, it may provide accurate positioning of the bonding surfaces. It may also provide a uniform distance between bonded surfaces, and reduce the number of bonding operations, thereby affording an excellent working efficiency.

Device and method for joining ceramics structural body

A ceramic honeycomb structure body () including a configuration in which a plurality of porous honeycomb segments () are bound one another with an adhesive layer () interposed between each two neighboring porous honeycomb segments (), where a plurality of protrusion portions () fixed to one of the adhesion surfaces () respectively of two honeycomb segments () opposed to each other with the adhesive layer () interposed between the two honeycomb segments () are embedded into the adhesive layer ().

Ceramic honeycomb structure body and method of manufacturing the same

A honeycomb structure includes a plurality of honeycomb segments each having a polygonal cross section with an adhesive agent interposed between each two honeycomb segments, the plurality of honeycomb segments each having a plurality of channels which are partitioned from one another by porous partition walls, the plurality of channels penetrating through the honeycomb segment in a uniaxial direction. The plurality of honeycomb segments are arrayed in a way that adhesive agent-applied surfaces and adhesive agent-unapplied surfaces respectively of the plurality of honeycomb segments are arranged alternately along bonded lines each joining bonded surfaces respectively of abutting honeycomb segments. In each of the honeycomb segments, an adhesive agent is applied to at least one side surface, and the honeycomb segments and at least one honeycomb segment, in each of which the adhesive agent is applied to no side surface.

Honeycomb structure and method of manufacturing the same

A method of bonding at least a first ceramics structure () to a second ceramics structure (), which includes the steps of applying a pressure to the first ceramics structure () and the second ceramics structure () in such a direction that these structures move close to each other with a bonding material layer () interposed between the first ceramics structure () and the second ceramics structure () (FIG. A), removing a bonding material () extruded from the bonding material layer () to an end face of a stacked body including the first ceramics structure () and the second ceramics structure () by the application of the pressure thereto (FIG. B), drying a bonding material () near the end face of the stacked body () after the extruded bonding material () is removed (FIG. C), and drying the entire part of the stacked body ().

Method of bonding ceramics structures

Respective pieces of the porous honeycomb segments () are stacked while interposing the adhesive layers between respective adhered surfaces (), and are bonded together by performing main pressurization (F, F) on the whole through the porous honeycomb segments () located on an outermost layer after stacking a predetermined number of pieces. Main pressurization force at this time is simultaneously applied to all the honeycomb segments () and does not act as a separating force against any of the honeycomb segments ().

Bonding method of ceramic honeycomb structure

There is disclosed a sealing material for sealing a ceramic structure, the sealing material containing a ceramic component, an ordinary-temperature liquid component, and a suspending agent. In a method in which opening end portions of a large number of through channelsdivided by partition wallsand extending in an axial direction in a honeycomb structureincluding the through channels, the method comprises the steps of: sealing the opening end portions using the above-described sealing material. Sealed portionsare formed in the opening end portions of the through channelsby the sealing material. There are disclosed a sealing material, a sealing method for a honeycomb structure, and a sealed honeycomb structure in which less kinks are generated in the sealed portions, and a depth in each sealed portion fluctuates little.

Sealing material, method for sealing honeycomb structure and sealed honeycomb structure

There is provided a honeycomb structureproduced by bonding a plurality of honeycomb segmentsinto one piece via a bonding layer, each segmenthaving a number of through-holesdivided from each other by porous partition wallsand extending in the axial direction of the honeycomb segment. The bonding layercomprises at least one cement layerand at least one undercoat layerpresent between the honeycomb segmentand the cement layer. There is provided a process for producing a honeycomb structure, wherein bonding the honeycomb segmentscomprises applying at least one layer of an undercoat on each honeycomb segment, applying at least one layer of a cement, and bonding the honeycomb segments into one piece. The honeycomb structure has a high bonding strength and hardly gives defects such as cracks in bonded portion.

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Nagoya, Japan

Jun Fujita