Introduction to the production process of electrophoretic coating equipment

Electrophoresis coating equipment negative electrode electrophoresis production process introduction: ultrafiltration membrane has two types: roll type and tube type. The ultrafiltration device is the main auxiliary equipment for electrodeposition spraying. Using a suitable ultrafiltration device, it will provide the ultra-leachate that is reached for the post-washing of the product after spraying, and it can also selectively remove some of the bath liquid. Low-molecular structure chemical substances or electrolyte solutions, etc., reach the purpose of tank liquid purification treatment. When the oxidation-reduction potential of the super-leachate is too high, a part of the super-leachate can be discharged, double distilled water is replaced, and a part of the co-solvent and organic matter can be adjusted in many ways.

1. Filter equipment

In order to immediately remove the residue particles of the working fluid of electrodeposition architectural coatings, the management system should set up filter equipment, generally there are two types of filter cartridges and filter screens.

2. Baking machine The baking machine must take into account the high temperature resistance and thickness of the coated raw materials. In order to ensure the quality of the coating, the heat convection method can be used to achieve the actual effect of driving and heat conduction, to achieve the purpose of the uniform color of the coating.

3. DC stabilized power supply

The DC stabilized power supply is an electromechanical device that provides the electrodeposition process, and its wave index is generally less than 5%. The working voltage of the larger application is as close as possible to the working voltage of the electrophoretic paint. The current intensity required for spraying should be 20A/m2, and the power supply voltage should be adjustable. The DC power supply machinery and equipment can use thyristors or silicon tubes and transformer rectifiers. Soft start can be used to start.

4. Heat exchanger, water washing equipment, weapon equipment and equipment for electrodeposition liquid

5. Process:

(1) Clean the piping of the electrophoresis tank circulation system

A. Clean up the visible residue particles, dust and oil stains in the electrophoresis tank.

B. Then put appropriate demulsifiers, organics, and solvent funds into the electrophoresis tank, and fill it with drinking water. The circulation system is 3-5 hours to clean up the oil stains in the electrophoresis tank and the circulation system pipeline, and the alkaline residues in the neutralization tank are then discharged. Used to clean the water washing tank and anodized hood.

C. Separate and clean the residual positive ions in the electrophoresis tank, circulation system pipeline and pump with double distilled water.

(2) Preparation of electrophoresis solution: According to the standard of the electrophoresis tank, carry over the original consumption required, and use double distilled water to dilute the original car paint to the standard solid content of the paint as required. And pass the 280-350 mesh filter into the tank, let the electrophoretic paint circulation system mature for 24 hours.

(3) Electrophoresis temperature: It is generally controlled between 30-35℃, and the thickness of the paint layer increases with the increase in temperature. (2) Engineering construction working voltage: 　　 According to the different aluminum profiles and the different spacing between the pole pieces, the engineering construction working voltage is generally controlled at 80-180V. (3) Electrophoresis time: According to the thickness of the paint layer, it is generally operated in 40-90 seconds.

(4) Roasting: Roasting temperature is 180℃, and it is always controlled at up and down for 30 minutes.