JPH05230697A - Method and apparatus for cleaning carrier bar power supply part of electrodeposition coating line transfer mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To clean the carrier bar power supply section of the electrodeposition coating device. In an electrodeposition coating line transfer mechanism, at least one of the power supply parts of an anodizing tank, an electrolytic coloring tank, and an electrodeposition tank for energizing electrical contacts attached to a carrier bar for transferring an object to be processed, A carrier bar of an electrodeposition coating line transfer mechanism, which is provided with a container for washing hot water surrounding the power supply unit, and a branch pipe from an overflow circulation pump of a hot water washing tank is connected to the container to supply hot water into the container. How to clean the power supply. [Effect] It is possible to continuously produce a homogeneous product without causing poor contact of the electrical contacts of the carrier bar for a long period of time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for efficiently performing electrodeposition coating by cleaning a carrier bar power supply portion in an electrodeposition coating line transfer mechanism for electrodeposition coating of conductive articles.

[0002]

2. Description of the Related Art Conventionally, in electro-deposition coating, conductive articles are usually subjected to a series of treatments from pre-treatment to electro-deposition coating, so that the treatment tanks are usually installed in series or in parallel. , Is being consistently processed.

At this time, the object to be processed is successively processed in each tank by suspending it on a carrier bar for transferring the same by operating the line. However, in each of these steps, an alkaline liquid, a coloring liquid, an acid, a paint, etc. are used, and metal sludge and electrodeposition resin components, which are considered to be generated by the adhesion of the treatment liquid, adhere to the electric contact surface of the carrier bar. As a result, poor contact may occur, current may not be sufficiently supplied, and product quality may vary.

As a countermeasure against such a contact failure in the power supply section or the like, the electric contact of the power supply section or the carrier bar is usually subjected to polishing treatment as one of the operating processes.

[0005]

However, the coating line must be stopped in order to polish the electrical contacts of the power supply section or the carrier bar as described above, which requires a lot of man-hours and lowers the operating efficiency. Can not escape.
Therefore, there is a demand for a more effective means to replace the polishing process for electrical contacts and the like.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems, and to provide a method and an apparatus for efficiently performing electrodeposition coating by cleaning the electrical contacts of a carrier bar of an electrodeposition coating line transfer mechanism. ..

[0007]

[Means for Solving the Problems] In order to achieve the above object, the inventors of the present invention have conducted extensive studies and, as a result, have utilized the hot water discharged from the hot water washing tank of the electrodeposition coating line to supply the power supply unit and the carrier bar. The inventors have found that it is effective to wash the metal sludge and the electrodeposited resin component attached to the electrical contact, and have completed the present invention.

That is, in the present invention, a degreasing tank, an etching tank, a neutralization tank, an anodizing tank, an electrolytic coloring tank, a water washing tank, a hot water washing tank, an electrodeposition tank, a draining tank, a drying furnace and the like are appropriately arranged. In the electrodeposition coating line transfer mechanism, the gist is a method for cleaning the carrier bar power supply part of the electrodeposition coating line transfer mechanism, which comprises supplying hot water from a hot water washing tank. In, in at least one of the anodizing tank, the electrolytic coloring tank, the water washing tank after electrodeposition, and the hot water washing tank, a washing hot water container surrounding the power supply part is installed, and the container is connected to a filtration circulation pump of the hot water washing tank. The gist is the carrier bar power supply cleaning device of the electrodeposition coating line transfer mechanism that connects the branch pipes.

[0009]

The structure and operation of the present invention will be described. In the present invention, the power supply part of the carrier bar is cleaned using the hot water discharged from the hot water washing tank placed in the electrodeposition coating line. It is possible to remove metal sludge, electrodeposited resin, alkaline liquid, acid, etc. that have just adhered to the power supply part of the carrier bar by washing with water, but this is not enough, and the effect increases as the water temperature increases. It was confirmed.

Hot water of 80 to 90 ° C. is discharged from the hot water washing tank placed in the electrodeposition coating line during operation, and hot water of overflow water is branched from a hot water washing tank filtration circulation pump. It is designed such that it is supplied to a washing hot water container for washing. A small container for receiving hot water from the hot water washing tank is provided in the water washing tank and the hot water washing tank, and the hot water is supplied to a depth at which the electrical contacts of the carrier bar can be immersed.

The tank for providing the container for receiving the hot water may be any of a rinsing tank after anodic oxidation, a rinsing tank after electrolytic coloring, a rinsing tank after hot water bathing and a rinsing tank after electrodeposition, but all the tanks are provided. If so, the decontamination effect becomes large, and continuous operation for a long period of time becomes possible.

[0012]

Embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

Example 1 Matte electrodeposition coating of aluminum profiles was carried out in the electrodeposition coating line transport mechanism 1 shown in FIG.

Hanifine (manufactured by Honey Kasei Co., Ltd.) is used as the electrodeposition coating liquid, and the above-mentioned shaped material, which has been subjected to degreasing and anodizing treatment of the material in accordance with a conventional method and then inorganic electrolytically colored bronze, is used as an anode. With a -8 stainless steel pipe as the cathode, a voltage of 180 V is applied between the electrodes, and the liquid temperature is 20
Electricity was applied for 2.5 minutes at a temperature of 0.1 ° C. and a current density of 0.1 A / dm ² .

At this time, part of the hot water of 85 ° C. overflowing from the upper portion of the hot water washing tank 5 is returned to the hot water washing tank by the filtration circulation pump so that the hot water provided in the hot water washing tank is received from the branch pipe 3. It was sent to the container 7 of.

The depth of the container 7 is 10 cm. The hot water to be fed is supplied at a rate of 7 L / min when the electrical contact 8 of the carrier bar is placed in the hot water washing container of the hot water washing tank. The water supply time is the same as the time for electrodeposition.
It was 5 minutes. When the electrodeposition coating line was operated under these conditions, continuous operation became possible with no problems compared to the conventional method.

Example 2 Under the same electrodeposition conditions as in Example 1, a vessel for receiving hot water similar to the hot water bath was attached to the water washing bath 9 after anodic oxidation and the water washing bath 10 after electrolytic coloring. Hot water was supplied and operation was performed. As a result, continuous operation became possible without further trouble than in the case of Example 1.

Comparative Example When the electrodeposition coating line was operated in a state where hot water was not supplied, a contact failure occurred in 90 days and it was necessary to polish the carrier bar power supply section. According to the present invention, it is apparent that the frequency of polishing the carrier bar power supply section is significantly reduced as compared with the conventional case.

[0019]

Since the present invention is constructed as described above, it is possible to continuously produce a homogeneous product without causing poor contact of the electrical contacts of the carrier bar for a long period of time. Yes, it is extremely effective in industry.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of the present invention.

FIG. 2 is an enlarged view of a main part of the present invention (bath bath).

[Explanation of symbols]

 1 Coating line 2 Carrier bar 3 Branch pipe 4 Material to be coated 5 Hot water washing tank 6 Water washing tank after electrodeposition coating 7 Washing hot water container 8 Carrier bar electrical contacts 9 Water washing tank after anodizing 10 Water washing tank after electrolytic coloring 11 Electrolysis Coloring tank 12 Electroplating tank

Claims (2)

[Claims] 1. An electrodeposition coating in which a degreasing tank, an etching tank, a neutralization tank, an anodizing tank, an electrolytic coloring tank, a water washing tank, a hot water washing tank, an electrodeposition tank, a draining tank, a drying furnace and the like are appropriately arranged. In the line transfer mechanism, the carrier bar power supply part of the electrodeposition coating line transfer mechanism, which consists of supplying hot water discharged from the hot water washing tank to the washing hot water container provided in the water washing tank and / or the hot water washing layer, is washed. Method. 2. A cleaning hot water container surrounding the power feeding part is installed in at least one of an anodizing tank, an electrolytic coloring tank, a water washing tank after electrodeposition, and a hot water washing tank in the electrodeposition coating line transfer mechanism, A carrier bar power supply cleaning device for an electrodeposition coating line transfer mechanism in which a branch pipe from a filtration circulation pump of a hot water washing tank is connected to the container