Coating apparatus and coating method

Patent metadata

Field	Value
Publication number	US-12420304-B2
Application number	US-202217819378-A
Country	US
Kind code	B2
Filing date	Aug 12, 2022
Priority date	Mar 4, 2021
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

According to one embodiment, a coating apparatus includes a coating bar configured to face a member to be coated, and a plurality of nozzles configured to supply a liquid toward the coating bar. A number of the nozzles is 3 or more. An arithmetic mean roughness Ra of at least a part of a surface of the coating bar is not less than 0.5 μm and not more than 10 μm.

First claim

What is claimed is:

1. A coating apparatus, comprising:
a coating bar configured to face a member to be coated; and
a plurality of nozzles configured to supply a liquid toward the coating bar, wherein
a number of the nozzles is 3 or more,
an arithmetic mean roughness Ra of at least a part of a surface of the coating bar is not less than 0.5 μm and not more than 10 μm,
the coating bar includes at least one selected from the group consisting of stainless steel, titanium, and aluminum,
the surface includes an oxide of the at least one selected from the group consisting of stainless steel, titanium, and aluminum, and
a contact angle of the surface with respect to water is 50 degrees or less.

2. The coating apparatus according to claim 1 , wherein
at least the part of the surface includes unevenness, and
a maximum height Rz of the unevenness is not less than 5 μm and not more than 50 μm.

3. The coating apparatus according to claim 1 , wherein a meniscus of the liquid is configured to be formed between the member to be coated and the coating bar.

4. The coating apparatus according to claim 1 , wherein the plurality of nozzles are in contact with the coating bar.

5. The coating apparatus according to claim 1 , wherein a position of at least a part of the plurality of nozzles is higher than a position of the coating bar.

6. The coating apparatus according to claim 1 , further comprising a member to be coated holding portion configured to hold the member to be coated and to move the member to be coated relative to the coating bar, and
the member to be coated holding portion is configured to convey the member to be coated in a direction including a component opposite to an orientation of a gravity.

7. The coating apparatus according to claim 6 , wherein
the member to be coated includes a roll-shaped film, and
the member to be coated holding portion includes,
a first holding mechanism configured to hold a first portion of the roll-shaped film, and
a second holding mechanism configured to hold a second portion of the roll-shaped film.

8. The coating apparatus according to claim 6 , further comprising a supply part to supply the liquid to the plurality of nozzles.

9. The coating apparatus according to claim 8 , wherein
the supply part includes a plurality of pumps, and
a number of the plurality of nozzles is an integral multiple of a number of the plurality of pumps.

10. The coating apparatus according to claim 1 , further comprising a member to be coated holding portion configured to hold the member to be coated and to move the member to be coated relative to the coating bar, and
the member to be coated holding portion is configured to convey the member to be coated along a first direction crossing an orientation of a gravity.

11. The coating apparatus according to claim 1 , wherein a number of the plurality of nozzles is 12 or more.

12. The coating apparatus according to claim 1 , wherein a cross section of at least a part of the coating bar in a plane crossing a first direction in which the plurality of nozzles are arranged is circular.

13. The coating apparatus according to claim 1 , wherein
the surface includes a first region, a second region and a third region,
in a first direction in which the plurality of nozzles are arranged, the first region is between the second region and the third region
an arithmetic mean roughness Ra in the first region is not less than 0.5 μm and not more than 10 μm, and
an arithmetic mean roughness Ra in the second region and the third region is less than 0.5 μm or more than 10 μm.

14. The coating apparatus according to claim 1 , further comprising a position control part configured to control a relative position between the plurality of nozzles and the coating bar.

15. The coating apparatus according to claim 14 , wherein
the position control part includes
a first holding portion configured to hold the coating bar, and
a second holding portion configured to hold the multiple nozzles, and
at least one of the first holding portion and the second holding portion is configured to apply a stress having at least one of an orientation from the coating bar to the plurality of nozzles and an orientation from the plurality of nozzles to the coating bar to at least one of the coating bar and the plurality of nozzles.

16. The coating apparatus according to claim 1 , wherein a spacing between the plurality of nozzles is variable.

17. A coating method comprising;
coating the liquid to the member to be coated by the coating apparatus according to claim 1 .

Assignees

• Toshiba Kk
• Toshiba Energy Systems & Solutions Corp

Inventors

• Shida Naomi
• Naito Katsuyuki
• Saita Yutaka

Classifications

• B05D1/40

  Distributing applied liquids or other fluent materials by members moving relatively to surface · CPC title

• B05D1/26 Primary

  performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface · CPC title

• B05C13/00

  Means for manipulating or holding work, e.g. for separate articles {(B05C1/0821 takes precedence)} · CPC title

• B05C5/027

  Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated (B05C5/0254 takes precedence) · CPC title

• B05C5/00

  Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work (B05C7/00 takes precedence; essentially involving spraying or electrostatic projection B05B) · CPC title