Immersion-type surface treatment tank

Patent metadata

Field	Value
Publication number	US-9738985-B2
Application number	US-201615131570-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	Apr 22, 2015
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

An immersion-type surface treatment tank includes a treatment tank body including: a single tank internal space elongated in a plan view, and a nozzle that ejects an electrodeposition paint into the tank internal space. The treatment tank body includes: a first tank inner side surface extending along a longitudinal direction of the tank internal space; a second tank inner side surface facing the first tank inner side surface and extending along the longitudinal direction; and a rectifying plate that is formed halfway in the longitudinal direction and changes a flow direction of the electrodeposition paint such that the electrodeposition paint flowing horizontally along the first tank inner side surface is directed toward the second tank inner side surface. The rectifying plate changes the flow direction of the electrodeposition paint, thereby forming, in the tank internal space, at least two horizontal swirl flows adjacent to each other in the longitudinal direction.

First claim

What is claimed is:

1. An immersion surface treatment tank comprising:
a treatment tank body including a single tank internal space having an elongated shape in a plan view; and
a first nozzle and a second nozzle that are configured to eject a treatment liquid into the tank internal space, wherein
the treatment tank body includes:
a first tank inner side surface extending along a longitudinal direction of the tank internal space;
a second tank inner side surface that faces the first tank inner side surface and extends along the longitudinal direction of the tank internal space; and
a plurality of rectifying portions that are formed at different positions in the longitudinal direction of the first tank inner side surface and the second tank inner side surface and are configured to change a direction of a flow of the treatment liquid ejected by the first nozzle and the second nozzle in such a manner that the treatment liquid flowing horizontally along the first tank inner side surface is directed toward the second tank inner side surface and the treatment liquid flowing horizontally along the second tank inner side surface is directed toward the first tank inner side surface, and

the plurality of rectifying portions are configured to change the direction of the flow of the treatment liquid, thereby forming, in the tank internal space, at least two horizontal swirl flows adjacent to each other in the longitudinal direction of the tank internal space.

2. The immersion surface treatment tank according to claim 1 , wherein
the rectifying portions that are formed on the second tank inner side surface face the rectifying portions that are formed on the first tank inner side surface, and
the rectifying portions formed on the second tank inner side surface change the direction of the flow of the treatment liquid in such a manner that the treatment liquid flowing from the first tank inner side surface to the second tank inner side surface is changed to flow along the second tank inner side surface.

3. The immersion surface treatment tank according to claim 1 , wherein
the rectifying portions formed on the first tank inner side surface have a curved rectifying surface that is curved to change the direction of the flow of the treatment liquid in such a manner that the treatment liquid flowing horizontally along the first tank inner side surface is directed toward the second tank inner side surface.

4. The immersion surface treatment tank according to claim 3 , wherein
the first nozzle is opened to the curved rectifying surface of the rectifying portion formed on the first tank inner side surface, and
the first nozzle is disposed so as to eject the treatment liquid toward the second tank inner side surface.

Assignees

• Toyota Motor Co Ltd
• Trinity Ind Corp

Inventors

• Nagasaka Kazutaka
• Fujiwara Keiichi
• Furuta Kenichi
• Nakamura Suguru
• Takada Akio
• Nozaki Issei
• Takahashi Isamu

Classifications

• C25D13/22 Primary

  Servicing or operating {apparatus or multistep processes} · CPC title