Method of manufacturing honeycomb structure and honeycomb structure

Patent metadata

Field	Value
Publication number	US-12415766-B2
Application number	US-202218067857-A
Country	US
Kind code	B2
Filing date	Dec 19, 2022
Priority date	Mar 8, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Provided is a method of manufacturing a honeycomb structure capable of manufacturing a honeycomb structure excellent in external dimension accuracy. A method of manufacturing a honeycomb structure includes: a preparation step of preparing a honeycomb molded body; a storage step of storing the honeycomb molded body under a state in which temperature and humidity are adjusted; and a fitting step of inserting the honeycomb molded body after the completion of the storage step into a heated metal tube and then cooling the metal tube.

First claim

What is claimed is:

1. A method of manufacturing a honeycomb structure, comprising:
a preparation step of extruding a plastic matter to produce a honeycomb molded body;
a drying step of drying the honeycomb molded body to produce a dried honeycomb molded body;
a storage step of storing the dried honeycomb molded body under a state in which temperature and humidity are adjusted; and
a fitting step of inserting dried honeycomb molded body after the completion of the storage step into a heated metal tube and then cooling the metal tube;
wherein a temperature during the storage step is set to 0° C. to 30° C.; and
wherein, in the storage step, a variation amount of temperature is 10° C. or less, a variation amount of humidity is 8 g/m 3 or less, and a storage time is 1 hour or more.

2. The method of manufacturing a honeycomb structure according to claim 1 , further comprising, after the storage step and before the fitting step, an outer surface processing step of processing an outer surface of the dried honeycomb molded body.

3. The method of manufacturing a honeycomb structure according to claim 2 , wherein the honeycomb molded body contains SiC.

4. The method of manufacturing a honeycomb structure according to claim 3 , further comprising, after the outer surface processing step and before the fitting step, an impregnation step of impregnating a molten metal containing Si into the dried honeycomb molded body by heating a supply body containing Si under a state in which the supply body containing Si is in contact with the dried honeycomb molded body.

5. The method of manufacturing a honeycomb structure according to claim 3 , further comprising, after the storage step and before the outer surface processing step, an impregnation step of impregnating a molten metal containing Si into the dried honeycomb molded body by heating a supply body containing Si under a state in which the supply body containing Si is in contact with the dried honeycomb molded body.

6. A method of manufacturing a honeycomb structure, comprising:
a preparation step of extruding a plastic matter to produce a honeycomb molded body;
a drying step of drying the honeycomb molded body to produce a dried honeycomb molded body;
a storage step of storing the dried honeycomb molded body under a state in which temperature and humidity are adjusted;
a fitting step of inserting the dried honeycomb molded body after the completion of the storage step into a heated metal tube and then cooling the metal tube; and
an outer surface processing step of processing an outer surface of the dried honeycomb molded body after the storage step and before the fitting step,
wherein the honeycomb molded body contains SiC, and
wherein, in the storage step, a temperature is set to 0° C. to 30° C., a variation amount of temperature is 10° C. or less, a variation amount of humidity is 8 g/m 3 or less, and a storage time is 1 hour or more.

7. The method of manufacturing a honeycomb structure according to claim 6 , further comprising, after the outer surface processing step and before the fitting step, an impregnation step of impregnating a molten metal containing Si into the dried honeycomb molded body by heating a supply body containing Si under a state in which the supply body containing Si is in contact with the dried honeycomb molded body.

8. The method of manufacturing a honeycomb structure according to claim 6 , further comprising, after the storage step and before the outer surface processing step, an impregnation step of impregnating a molten metal containing Si into the dried honeycomb molded body by heating a supply body containing Si under a state in which the supply body containing Si is in contact with the dried honeycomb molded body.

Assignees

• Ngk Insulators Ltd

Inventors

• Akahani Tatsuya
• Kuno Shuhei
• Akaishi Ryushiro

Classifications

• C04B41/4523

  applied from the molten state (vitreous materials C04B41/5022); Thermal spraying, e.g. plasma spraying · CPC title

• C04B38/00

  Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof (treating slag with gases or gas generating material C04B5/06 {; expanded graphite C04B35/536}) · CPC title

• C04B38/0009

  characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls · CPC title

• C04B41/5096 Primary

  Silicon (C04B35/573 takes precedence) · CPC title

• C04B2111/00793

  as filters or diaphragms · CPC title