Ngk Insulators, Inc.

Masanari Iwade

Seiichiro Hayashi

Tomoki Nagae

Hirofumi Hosokawa

Yasumasa Fujioka

Makoto Murai

Akifumi Nishio

Yoshihiro Sato

Hironori Takahashi

Takafumi Terahai

Masayuki Hironaga

Yuji Watanabe

Ryota Kurahashi

Yutaka Ishii

Taishi Michiwaki

Takakazu Koyama

Takaaki Kanemitsu

Kenji Ebisutani

Akinari Fukaya

An inspection method for a pillar-shaped honeycomb filter having a honeycomb-shaped first end face and a honeycomb-shaped second end face, including:

Inspection method for pillar-shaped honeycomb filter

To provide a technique related to a marking base that allows clear marking by ink and is excellent in thermal resistance and chemical resistance. A marking base composition contains inorganic particles of 27 to 50 mass %, an inorganic binder of 5 to 20 mass %, an organic binder of 3 to 16 mass %, a thermal expansion resin of 1 to 3 mass %, and an organic solvent.

Marking base composition and marking base using the same

There is disclosed a grinding method of a honeycomb structure, wherein a grind processing member having an outer peripheral surface, a first grinding wheel tapered surface and a second grinding wheel tapered surface and rotating around a central axis grinds a joined honeycomb segment assembly rotating around a central axis, and the above respective surfaces of the grind processing member form a first ground region, a second ground region, a center ground surface, a first tapered surface and a second tapered surface, to prepare the honeycomb structure including a cylindrical honeycomb base material, and a ring-like bulge portion 'which surrounds an outer periphery of the honeycomb base material, protrudes from the outer periphery of the honeycomb base material toward the outside in a flange manner, and has the first tapered surface, the second tapered surface and the center ground surface.'

Grinding method of honeycomb structure

By providing a honeycomb electrode, i.e., an electrode for a honeycomb structure forming die including a thick plate-like electrode base body made of an electricity discharging material and having two main surfaces, only one surface of two main surfaces of the electrode base body is provided with a plurality of electrode cells partitioned by electrode partition walls, and a shape of the electrode cells in the one surface is analogous to that of flow-through cells of the honeycomb structure.

Electrode for honeycomb structure forming die

By providing a manufacturing method of an electrode for a honeycomb structure forming die including: preparing a thick plate-like electrode base body made of an electricity discharging material and having two surfaces; making a plurality of holes in the electrode base body at positions corresponding to flow-through cells; inserting processing electrodes into the holes, and discharging electricity from the insides of the holes toward side surfaces of the holes of the electrode base body to process the side surfaces of the holes of the electrode base body into shapes corresponding to the porous partition walls; whereby obtaining an electrode where a plurality of electrode cells partitioned by electrode partition walls appear on at least one of the surfaces thereof.

Manufacturing method of electrode for honeycomb structure forming die

A method for manufacturing a honeycomb structure forming die including a liquid groove forming step for forming linear processing liquid grooves whose width is smaller than that of the slit, in positions for forming the slits that form the partition walls of the honeycomb structure by subjecting the kneaded clay to extrusion in one side end face as a kneaded clay forming face of a plate-shaped die substrate. An introduction hole forming step for forming introduction holes for introducing the kneaded clay is performed before or after the liquid groove forming step. Slits communicating with the introduction holes are formed by performing comb-like electro-discharge machining by a comb-like electrode where plate-shaped protrusion electrodes, each corresponding to the width of the slit, are disposed in positions including the processing liquid grooves.

Method for manufacturing honeycomb structure forming die

There is provided a method for manufacturing a honeycomb structure forming die, the method includes: an introduction hole forming step for forming, in plate-shaped die substrate having one side end face and the other side end face, a plurality of introduction holes for introducing kneaded clay on the other side end face to function as a kneaded clay introduction face, and a slit forming step for forming slits communicating with the introduction holes in order to form the partition walls of the honeycomb structure by extruding the kneaded clay by performing a comb-like electro-discharge machining by a comb-like electrodewhere a plurality of plate-shaped protrusion electrodescorresponding with width of the slits are disposed on the one side end face to function as a kneaded clay formation face of the die substrate.

A die for forming a honeycomb structure, comprising a platy die base member having a clay supply face on back surface thereof and including a plurality of introduction holes for introducing a mixed raw material for forming; and a clay forming face on upper surface including a plurality of slits for extrusion of the material being connected to the introduction holes and formed lattice-like partition regions; at least a part of lattice-like partition regions being provided in such a position that the extended line of at least part of a plurality of lattice-like regions overlap with the slits at edges thereof as top view, slits including inner peripheral slits formed in the inner peripheral region, and outer peripheral slits formed in the outer peripheral region surrounding the inner peripheral region and having a width-enlarged portion having a width larger than that of the inner peripheral slit, and production method thereof.

Die for forming honeycomb structure and manufacturing method of the same

A plate-like shape diefor forming a honeycomb structure provided with an introduction portionhaving plural back holes on one side face (an introduction side) thereof and a formation portion provided with siltscommunicating with plural back holeson other side face thereof; using for forming a honeycomb shape with passing raw materials being introduced from back holesof an introduction portionthrough siltsbeing provided on the forming portion, wherein the introduction portionis composed of two layers of a plate-like abrasion portionconstituting an introduction face, and an introduction portion main bodylocated between the abrasion portionand the forming portion, and the abrasion portionis detachably disposed on the introduction portion main body

Die for forming honeycomb structure

A process for producing a die for forming a honeycomb structure having slits having hexagonal honeycomb cell shapeat one of surfacesof a plate-like base material for die, and backside holeseach communicating with respective slitsat the other surface, which comprises the steps of forming holesfor dielectric fluid each having an opening diameter smaller than the width of the slitin a predetermined depth at the one of surfacesthereof, and holescommunicating with holesat the rest surface; and then passing a dielectric fluidfor electrical discharge machining from the surfaceto the surfacevia holesanduntil the machining proceeds to a position communicating with each hole; thereby, the slitsare formed at the surfaceof the base material

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Nagoya, Japan

Masanari Iwade