Method for producing ceramic honeycomb structure

Patent metadata

Field	Value
Publication number	US-2020299201-A1
Application number	US-202016744538-A
Country	US
Kind code	A1
Filing date	Jan 16, 2020
Priority date	Mar 19, 2019
Publication date	Sep 24, 2020
Grant date	—

Abstract

A method for producing a ceramic honeycomb structure including: plugging ends of cells on one of a first end face side and a second end face side in each of the cells of a ceramic honeycomb formed body that includes partition walls defining the cells extending from the first end face to the second end face; placing the ceramic honeycomb formed body on a shelf board with the first end face facing downward; arranging at least one lid member on the second end face of the ceramic honeycomb formed body so as to completely cover the second end face; and placing the ceramic honeycomb formed body together with the shelf board and the lid member in a firing furnace and firing the ceramic honeycomb formed body.

First claim

1 . A method for producing at least one ceramic honeycomb structure, the method comprising:
a plugging step of plugging ends of cells on one of a first end face side and a second end face side in each of the cells of at least one ceramic honeycomb formed body, the at least one ceramic honeycomb formed body comprising partition walls that define the cells extending from the first end face to the second end face; a shelf board placing step of placing the at least one ceramic honeycomb formed body on a shelf board with the first end face facing downward; a lid arranging step of arranging at least one lid member on the second end face of the at least one ceramic honeycomb formed body so as to completely cover the second end face; and a firing step of placing the at least one ceramic honeycomb formed body together with the shelf board and the lid member in a firing furnace and firing the at least one ceramic honeycomb formed body.

2 . The method for producing at least one ceramic honeycomb structure according to claim 1 , wherein in the shelf board placing step, a firing setter is arranged between the shelf board and the first end face of the ceramic honeycomb formed body.

3 . The method for producing at least one ceramic honeycomb structure according to claim 1 , wherein the lid member is formed of an inorganic material.

4 . The method for producing at least one ceramic honeycomb structure according to claim 1 , wherein the lid member is a firing setter.

5 . The method for producing at least one ceramic honeycomb structure according to claim 1 , wherein the lid arranging step is carried out immediately after the plugging step.

6 . The method for producing at least one ceramic honeycomb structure according to claim 1 , further comprising a defect inspection step of carrying out a defect inspection by a laser smoke method after firing the ceramic honeycomb formed body.

7 . The method for producing at least one ceramic honeycomb structure according to claim 1 , wherein after firing, the partition walls are formed of at least one ceramic selected from the group consisting of cordierite, silicon carbide, silicon-silicon carbide based composite materials, silicon nitride, mullite, alumina, silicon carbide-cordierite based composite materials and aluminum titanate.

8 . The method for producing at least one ceramic honeycomb structure according to claim 1 , wherein each of the partition walls after firing has a thickness of from 0.10 to 0.45 mm.

Assignees

• Ngk Insulators Ltd

Inventors

• Komai Yukari
• Nagai Shungo

Classifications

• B28B11/006

  Making hollow articles or partly closed articles · CPC title

• Y02A50/20

  Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters · CPC title

• B28B11/248

  Supports for drying · CPC title

• B28B11/243

  Setting, e.g. drying, dehydrating or firing ceramic articles (B28B11/242 takes precedence) · CPC title

• B28B11/007

  Using a mask for plugging · CPC title