Method for manufacturing honeycomb structure

Patent metadata

Field	Value
Publication number	US-2018283784-A1
Application number	US-201815921885-A
Country	US
Kind code	A1
Filing date	Mar 15, 2018
Priority date	Mar 28, 2017
Publication date	Oct 4, 2018
Grant date	—

Abstract

A method for manufacturing a honeycomb structure, includes: a step of manufacturing a honeycomb formed body to manufacture a non-fired honeycomb formed body, the non-fired honeycomb formed body including a raw material composition containing a ceramic raw material and water; an induction drying step of drying the manufactured non-fired honeycomb formed body by induction drying to obtain a honeycomb dried body; and a firing step of firing the obtained honeycomb dried body to obtain a honeycomb structure. The induction drying step is to remove 10 to 50% of the entire water that the non-fired honeycomb formed body contained before drying by induction drying to obtain a first dried honeycomb formed body, then turn the first dried honeycomb formed body upside down and remove the residual water by further induction drying to obtain the honeycomb dried body.

First claim

What is claimed is:

1 . A method for manufacturing a honeycomb structure, comprising:
a step of manufacturing a honeycomb formed body to manufacture a non-fired honeycomb formed body including a cell wall that defines a plurality of cells extending from a first end face as one end face to a second end face as the other end face, the non-fired honeycomb formed body including a raw material composition containing a ceramic raw material and water; an induction drying step of drying the manufactured non-fired honeycomb formed body by induction drying to obtain a honeycomb dried body; and a firing step of firing the obtained honeycomb dried body to obtain a honeycomb structure, wherein the induction drying step is to remove 10 to 50% of the entire water that the non-fired honeycomb formed body contained before drying by induction drying to obtain a first dried honeycomb formed body, then turn the first dried honeycomb formed body upside down and remove the residual water by further induction drying to obtain the honeycomb dried body.

2 . The method for manufacturing a honeycomb structure according to claim 1 , wherein the non-fired honeycomb formed body to be supplied to the induction drying step has water content before drying of 20 to 50%.

3 . The method for manufacturing a honeycomb structure according to claim 1 , further comprising a hot air drying step of further drying the honeycomb dried body subjected to the induction drying step by hot air.

4 . The method for manufacturing a honeycomb structure according to claim 1 , wherein the non-fired honeycomb formed body to be supplied to the induction drying step has a thickness of the cell wall that is 50 to 350 μm.

5 . The method for manufacturing a honeycomb structure according to claim 1 , wherein, in the induction drying step, drying is performed using a first induction drying device to obtain the first dried honeycomb formed body and a second induction drying device to further induction-dry the first dried honeycomb formed body to obtain the honeycomb dried body.

Assignees

• Ngk Insulators Ltd

Inventors

• Okumura Kensuke

Classifications

• C04B2235/3217

  Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina · CPC title

• C04B38/0006

  Honeycomb structures (from one or more corrugated sheets by winding or stacking C04B38/0083) · CPC title

• C04B35/195

  Alkaline earth aluminosilicates, e.g. cordierite {or anorthite} · CPC title

• C04B2235/6021

  Extrusion moulding · CPC title

• C04B2111/0081

  as catalysts or catalyst carriers · CPC title