公开(公告)号：US20220404261A1

公开(公告)日：2022-12-22

申请号：US17650400

申请日：2022-02-09

Applicant: NGK INSULATORS, LTD.

Inventor： Yohei KAJIURA ,  Yuji WATANABE ,  Yoshihiro SATO ,  Yuichi TAJIMA

IPC: G01N15/14 ,  G01N1/38

Abstract: An inspection device for a pillar shaped honeycomb filter includes: a housing portion that can house a pillar shaped honeycomb filter; an introduction pipe and a discharge pipe through which a gas can flow, each of the introduction pipe and the discharge pipe being connected to the housing portion; a particle generation portion for generating particles; a particle introduction portion for introducing the particles generated by the particle generation portion into the introduction pipe; a gas stirring portion arranged in the introduction pipe on an upstream side of the particle introduction portion in a gas flow direction; and particle counters for measuring the number of particles, the particle counters being arranged in the introduction pipe and the discharge pipe on a downstream side of the particle introduction portion in the gas flow direction.

公开(公告)号：US20200255347A1

公开(公告)日：2020-08-13

申请号：US16774350

申请日：2020-01-28

Applicant: NGK INSULATORS, LTD.

Inventor： Ken ITADU ,  Nobuhiro FUJIE ,  Yuji WATANABE

IPC: C04B40/00 ,  B28B11/24 ,  B28B11/14

Abstract: A method for producing a honeycomb structure, the method including: a step of drying a pillar-shaped honeycomb formed body including partition walls that define a plurality of cells each forming a flow path penetrating from a first end face to a second end face; and after the step of drying, a step of cooling the honeycomb formed body by applying a suction force to the first end face of the honeycomb formed body to allow a coolant to flow in the honeycomb formed body from the second end face, pass through the cells, and flow out from the first end face.

公开(公告)号：US20190299487A1

公开(公告)日：2019-10-03

申请号：US16354759

申请日：2019-03-15

Applicant: NGK INSULATORS, LTD.

Inventor： Nobuhiro FUJIE ,  Yuji WATANABE ,  Ken ITADU ,  Yoshihiro SATO

IPC: B28B11/00 ,  F01N3/022

Abstract: A bottom face processing method of a pillar-shaped honeycomb structure including steps of: preparing a pillar-shaped honeycomb structure including a plurality of first cells which extend in parallel with each other from a first bottom face to a second bottom face, and each of which is opened in the first bottom face and has a protruding plugged portion in the second bottom face, and a plurality of second cells each of which is adjacent to at least one of the first cells with a partition wall interposed therebetween, which extend in parallel with each other from the first bottom face to the second bottom face, and each of which has a protruding plugged portion in the first bottom face, and is opened in the second bottom face; and removing the protruding portion from the plugged portion of each of the first cells and the second cells of the pillar-shaped honeycomb structure.

公开(公告)号：US20170284245A1

公开(公告)日：2017-10-05

申请号：US15460424

申请日：2017-03-16

Applicant: NGK INSULATORS, LTD.

Inventor： Michio SUZUKI ,  Kojiro HAYASHI ,  Yuji WATANABE

IPC: F01N3/022 ,  C04B38/00 ,  B01D46/24 ,  B28B11/00

CPC classification number: F01N3/0222 ,  B01D46/2418 ,  B28B11/006 ,  C04B38/0012 ,  C04B2111/00793 ,  C04B35/565

Abstract: The manufacturing method of the plugged honeycomb structure includes a honeycomb structure forming step of forming a pillar-shaped honeycomb structure, and a plugging step of forming plugging portions in end portions of the cells of the honeycomb structure formed in the honeycomb structure forming step, and in the plugging step, there is performed a press pouring operation of pressing one end face of the honeycomb structure into a plugging slurry stored in a bottomed tubular container to pour, under pressure, the plugging slurry into the cells of the honeycomb structure, and as the plugging slurry of the plugging step, there is used a slurry in which a yield point viscosity of a viscous fluidity is 600 Pa·s or more, a recovery viscosity is 300 Pa·s or more, and a high shearing viscosity is 200 Pa·s or less.

公开(公告)号：US20240255408A1

公开(公告)日：2024-08-01

申请号：US18396937

申请日：2023-12-27

Applicant: NGK INSULATORS, LTD.

Inventor： Takakazu KOYAMA ,  Yuji WATANABE ,  Hiroyoshi INOUE ,  Takuya YAMADA

IPC: G01N15/08

CPC classification number: G01N15/08 ,  G01N2015/084

Abstract: An inspection device for a pillar shaped honeycomb filter, wherein the inspection device includes: a housing portion; an introduction pipe and a discharge pipe, each of the introduction pipe and the discharge pipe being connected to the housing portion; a particle generation portion for generating particles; a particle introduction portion for introducing the particles generated by the particle generation portion into the introduction pipe; a gas stirring portion disposed in the introduction pipe on an upstream side of the particle introduction portion; a particle concentration adjusting portion disposed in the introduction pipe on a downstream side of the particle introduction portion; and particle counters for measuring the number of particles, the particle counters being disposed in the introduction pipe and the discharge pipe on the downstream side of the particle introduction portion.

公开(公告)号：US20210302296A1

公开(公告)日：2021-09-30

申请号：US17184936

申请日：2021-02-25

Applicant: NGK INSULATORS, LTD.

Inventor： Yoshihiro SATO ,  Takakazu KOYAMA ,  Yuji WATANABE ,  Yutaka ISHII ,  Takaaki KANEMITSU ,  Makoto MURAI ,  Masanari IWADE ,  Takafumi TERAHAI ,  Ryota KURAHASHI ,  Akinari FUKAYA ,  Kenji EBISUTANI

IPC: G01N15/06 ,  G01N15/08 ,  G01N21/95

Abstract: An inspection method for a pillar-shaped honeycomb filter having a honeycomb-shaped first end face and a honeycomb-shaped second end face, including: allowing gas containing fine particles to flow into the first end face; imaging the entire second end face covered with the sheet-like light using a camera while the gas that has flowed into the first end face flows out of the second end face through the filter, and generating an image of the entire second end face covered with the sheet-like light; selecting an inspection area of the second end face and measuring information concerning a sum of luminance of each pixel in the inspection area; and determining quality of the filter based on at least the information concerning the concentration of the fine particles in the gas before the gas flows into the first end face and the information concerning the sum of luminance.