Ngk Insulators, Inc.

Jun Inoue

Takayoshi Akao

Yasumasa Fujioka

Keisuke Kimura

Takao Tani

Hiroyuki Shindo

Akifumi Nishio

Michio Suzuki

Yutaka Ishii

Yoshitaka Tabuchi

Daiki Nanya

Daisuke Miura

Keita Oikawa

Toshiharu Tsutsumi

A method for producing a honeycomb structure for fine particle collection filters, the honeycomb structure including a plurality of porous honeycomb structure segments. The method includes joining each of the porous honeycomb segments via a joining material layers by applying a joining material between joining surfaces of each of the porous honeycomb structure segments, through a nozzle portion of a joining material applicator. The nozzle portion of the joining material applicator includes: a joining material introduction port; a joining material discharge space; and a joining material flow path having a bent portion, through which the joining material passes from the joining material introduction port to the joining material discharge space. The joining material flow path of the nozzle portion includes a buffer space configured such that a flow path cross section gradually expands toward the joining material discharge space on a downstream side of the bent portion.

Method for producing honeycomb structure

A honeycomb structure including a plurality of porous honeycomb block bodies bound via joining material layers A. Each of the porous honeycomb block bodies includes a plurality of porous honeycomb segments bound via joining material layers B, each of the porous honeycomb segment includes: partition walls that defines a plurality of cells to form flow paths for a fluid, each of cells extending from an inflow end face that is an end face on a fluid inflow side to an outflow end face that is an end face on a fluid outflow side; and an outer peripheral wall located at the outermost periphery. At least a part of the joining material layers A has higher toughness than that of the joining material layers B.

Honeycomb structure and method for producing honeycomb structure

A scraping device for undried joining material protruding from a segment joint body in which side surfaces of a plurality of pillar-shaped honeycomb structure segments are joined via the undried joining material, the segment joint body having an outer peripheral side surface, a first honeycomb-shaped end surface, and a second honeycomb-shaped end surface located on an opposite side of the first honeycomb-shaped end surface, the scraping device includes a stand for placing the segment joint body; a controller; and a scraping robot comprising at least one scraping spatula configured to be movable in at least one scraping direction along at least one surface of the outer peripheral side surface, the first honeycomb-shaped end surface, and the second honeycomb-shaped end surface while being pressed against the at least one surface.

Scraping device for joining material and method for manufacturing segment joint body

An outer periphery coating method of honeycomb structure has coating steps where the honeycomb structure including a ring-like bulge portion is rotated; a coating member is brought into contact with a side surface of the honeycomb structure by pressing a side edge portion of a spatula via a rubber sheet, the coating member including the plate-like spatula in which a specific cut portion is formed in the one side edge portion and the side edge portion provided with the cut portion is an inclined surface inclined on a coating surface side, and the rubber sheet in which a cut is formed so that an end surface of the end portion is parallel to a back surface of the spatula when the end portion is bent along the side edge portion of the spatula; and a slurry coating material is supplied to the side surface of the honeycomb structure.

Outer periphery coating method of honeycomb structure

There is disclosed a method for preparing a honeycomb segment joined body in which a plurality of honeycomb segments are arranged in directions parallel to a first flat surface and a second flat surface of an installation reference jig to install the honeycomb segments in predetermined positions via a paste-like joining material on the installation reference jig by use of the installation reference jig having the first flat surface and the second flat surface forming a right angle therebetween, and then the joining material is dried and cured to join the plurality of honeycomb segments together. In the preparation method, in at least a part of a process of successively installing the plurality of honeycomb segments in the predetermined positions, when a new honeycomb segment is installed, at least a part of the installed honeycomb segments is pressurized and held in the predetermined positions so that the already installed honeycomb segments are not displaced.

Method of preparing honeycomb segment joined body

According to an apparatus for inspecting defects of a honeycomb structure that is provided with a current plate and an air current formation means (air source and a header tube), fine defects or defects taking place in the vicinity of an outer periphery of the honeycomb structure can be detected with high sensitivity.

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Nagoya, Japan

Jun Inoue