Method for manufacturing a honeycomb structure and honeycomb structure

By controlling storage conditions and incorporating a heated metal tube fitting process, the method addresses the issue of external dimensional accuracy in honeycomb structures, resulting in improved precision and consistency.

JP7873566B2Active Publication Date: 2026-06-12NGK CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
NGK CORP
Filing Date
2022-03-08
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing methods for manufacturing honeycomb structures fail to achieve satisfactory external dimensional accuracy, which is crucial for applications such as heat exchangers and exhaust gas purification filters.

Method used

A method involving controlled temperature and humidity storage of a honeycomb molded body, followed by fitting it into a heated metal tube, with optional external surface processing and impregnation with molten metal containing Si, to stabilize moisture absorption and improve dimensional accuracy.

Benefits of technology

The method enables the production of honeycomb structures with improved external dimensional accuracy, reducing variations to tens of micrometers, enhancing their performance and consistency.

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Patent Text Reader

Abstract

To provide a production method of a honeycomb structure which can produce a honeycomb structure which is excellent in external dimensional accuracy.SOLUTION: A production method of a honeycomb structure according to an embodiment of the invention includes: a preparation step in which a honeycomb molded body is prepared; a storage step in which the honeycomb molded body is stored in a state that a temperature and humidity are adjusted; and a fitting step in which a metal pipe is cooled after the honeycomb molded body is inserted into the heated metal pipe after completion of the storage step.SELECTED DRAWING: Figure 3
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