Electrophoresis tank system for steel wheel and electrophoretic coating method

Abstract

The invention provides an electrophoresis tank system for a steel wheel and an electrophoretic coating method. The electrophoresis tank system comprises a low-voltage tank section and a high-voltage tank section, a high-voltage power supply, a low-voltage power supply and an electrophoresis device transportation part, wherein a high-voltage anode structural part is arranged in the high-voltage tank section, and a low-voltage anode structural part is arranged in the low-voltage tank section; an anode of the high-voltage power supply is connected with the high-voltage anode structural part; an anode of the low-voltage power supply is connected with the low-voltage anode structural part; and the electrophoresis device transportation part is made of a conductive material and is connected with the negative electrode of the high-voltage power supply and the negative electrode of the low-voltage power supply. Compared with the prior art, the system has the beneficial effects that the bare anode without an anode film is arranged between anode units containing the anode film, and the plurality of anode units are arranged, so that the condition that the whole system stops running due to the fact that the anode film is broken down and damaged is avoided.

Description

technical field [0001] The invention belongs to the field of wheel manufacturing, and in particular relates to an electrophoresis tank system for steel wheels and an electrophoretic coating method. Background technique [0002] The electrophoretic coating of steel wheels refers to transporting the steel wheels to the electrophoretic tank. Under the action of the electric field, the electrophoretic paint makes the surface of the steel wheel at the cathode undergo an electronic chemical reaction, and a cationic paint film is deposited on the surface of the wheel, followed by high temperature drying. Bake to form an electrophoretic paint film with high-quality anti-corrosion properties. [0003] In the prior art, the electrophoresis starts as soon as the workpiece enters the anode area, and the voltage in the rectifier cabinet at this time is controlled at a constant value, which often causes "stripes" to appear on large-area flat parts. "Phenomenon, which affects the quality ...

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Problems solved by technology

[0003] In the prior art, the electrophoresis starts as soon as the workpiece enters the anode area, and the voltage in the rectifier cabinet at this time is controlled at a constant value, which often causes "stripes" to appear on large-area flat parts. "Phenomenon, which affects the quality of electrophoretic coating. In order to solve the problem of "horizontal stripes", the Chinese patent No. CN203212658U discloses a device for electrophoresis in different regions using low and high voltage power supplies at the same time.

[0004] Because the electrolytic reaction at the entrance of the high and low voltage tank section is the most intense, it is easy to break down the anode film when the anode enclosed in the anode cover undergoes electrode reaction, resulting in damage to the equipment

When using this system for production, part of the electrophoretic paint will be deposited on the surface of the low-voltage anode due to the above-mentioned positive and negative electrode discharge reactions, and will dissolve in the electrophoresis tank to form particles, which will adhere to the wheel surface and affect the appearance quality of the paint film.

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