Masking member, and method for coating pipe inner circumferential surface using same

Patent metadata

Field	Value
Publication number	US-11890641-B2
Application number	US-202017429985-A
Country	US
Kind code	B2
Filing date	Mar 23, 2020
Priority date	Apr 8, 2019
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A masking member used to coat a pipe inner circumferential surface of a vent stringer, wherein the masking member comprises: a sponge for blocking a pipe internal space of the vent stringer, the sponge having an outer circumferential surface capable of contacting the pipe inner circumferential surface; and a support member for supporting the sponge.

First claim

The invention claimed is:

1. A masking member used to coat a pipe inner peripheral surface of a hollow pipe, comprising:
a sponge that closes a pipe inner space of the hollow pipe, and has an outer peripheral surface which comes into contact with the pipe inner peripheral surface; and
a support member that supports the sponge,
wherein the sponge includes a first sponge layer and a second sponge layer having meshes coarser than those of the first sponge layer sequentially from a side closer to a coating portion in a pipe axis direction of the hollow pipe.

2. The masking member according to claim 1 ,
wherein the outer peripheral surface of the sponge comes into contact with the pipe inner peripheral surface over an entire periphery.

3. The masking member according to claim 1 ,
wherein the outer peripheral surface of the sponge is parallel to the pipe inner peripheral surface.

4. The masking member according to claim 1 ,
wherein the sponge is attachable to and detachable from the support member.

5. The masking member according to claim 1 , wherein the sponge has a supported surface facing the pipe axis direction, and the support member has a support surface facing the supported surface in the pipe axis direction.

6. The masking member according to claim 5 ,
wherein the sponge has a through-hole penetrating in the pipe axis direction, and
the support member includes
a support shaft portion inserted into the through-hole of the sponge,
a first support plate portion provided on one end side of the support shaft portion in the pipe axis direction, and formed along a first supported surface of the sponge which faces a first side in the pipe axis direction, and
a second support plate portion provided on the other end side of the support shaft portion in the pipe axis direction, and formed along a second supported surface of the sponge which faces a second side in the pipe axis direction.

7. The masking member according to claim 6 ,
wherein the second support plate portion is attachable to and detachable from the support shaft portion.

8. The masking member according to claim 1 ,
wherein the support member further includes an attachable and detachable grip.

9. A method for coating the pipe inner peripheral surface by using the masking member according to claim 1 , the method comprising:
a step of providing the masking member at a position separated from an opening of the hollow pipe by a determined dimension in the pipe axis direction;
a step of coating the pipe inner peripheral surface from the opening; and
a step of removing the masking member from the opening of the hollow pipe.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Katayama Tetsuya

Classifications

• B05D1/32 Primary

  using means for protecting parts of a surface not to be coated, e.g. using stencils, resists · CPC title

• B05B12/24 Primary

  made at least partly of flexible material, e.g. sheets of paper or fabric · CPC title

• B05C21/005

  Masking devices (stencils B05C17/06; masking devices for which the means for applying liquids or other fluent material is spraying or is not important B05B12/20) · CPC title

• B05D7/225

  Coating inside the pipe · CPC title

• B05D7/222

  of pipes · CPC title