公开(公告)号：US11660635B2

公开(公告)日：2023-05-30

申请号：US17643601

申请日：2021-12-10

Applicant: NGK INSULATORS, LTD.

Inventor： Ryo Fujimura ,  Kodai Kato ,  Akifumi Nishio

IPC: B05D3/02 ,  F01N13/14 ,  B05D1/02 ,  B05D1/00

CPC classification number: B05D3/0254 ,  B05D1/005 ,  B05D1/02 ,  F01N13/141 ,  F01N13/148

Abstract: A method of manufacturing a tubular member for an exhaust gas treatment device according to at least one embodiment of the present invention, the tubular member including a tubular main body made of a metal and an insulating layer formed on at least an inner peripheral surface of the tubular main body, the insulating layer containing glass, includes steps of: forming a coating film by spraying a coating liquid for insulating layer formation onto the inner peripheral surface of the tubular main body; and firing the coating film to obtain the insulating layer. The spraying is performed while the tubular main body is rotated with a length direction thereof being a rotation axis.