Electrostatic spraying processing: the flow of the process as well as the benefits and drawbacks of electrostatic spraying from dsfsdf's blog

Flow diagram of electrostatic spraying and advantages and disadvantages of electrostatic spraying for powder coating

The electrostatic spraying process is based on the following technical principles:

Corona discharge appears on the workpiece, and this appearance is used to encourage powder coating to adhere to the workpiece. The procedure is as follows: compressed air gas is used to feed the powder coating equipment into the spray gun from the powder supply system, and the high voltage generated by the high voltage electrostatic generator is applied to the front of the spray gun to create the desired effect. A full charge occurs in the vicinity of the spray gun as a result of the corona discharge that occurs. When the nozzle ejects, it creates charged paint particles that are attracted to the workpiece by the action of electrostatic force because their polarities are diametrically opposed to one another. The greater the amount of powder sprayed, the greater the amount of charge that accumulates. When it reaches a certain thickness, static electricity begins to build up within it. Wonder Copper (https://www. wondercopper. com/)Because of the absence of overhead action, all of the workpieces acquire a uniform layer of powder coating, which is then melted, leveled, and solidified by heat, resulting in the formation of a strong coating film on the surface of the workpiece's surface.

The following are some of the advantages of electrostatic spraying:

The working environment of employees can be improved because there is no or very little paint mist floating around in the air, for example.

2. It has the ability to automate the spray painting technology, resulting in increased production efficiency.

3. It can save a significant amount of paint when compared to other spraying methods.

4. The smoothness and adhesion of the paint film, as well as the overall quality of the paint film, have significantly improved.

Disadvantages include: 1. The equipment is a sloppy mess.

2. It has a high selectivity for solvents, and the coating's quality is also affected by temperature and humidity.

3. Because the DC voltage can reach up to 100kV, greater care must be taken to ensure that the system operates safely.

4. The surface of the coated object has a different shape than the surrounding environment (for example, the corrugation of the steel barrel versus the circle of the head), which will cause changes in the strength of the electric field, which will then affect the uniformity of the paint film.

Intention: To spray the powder coating equipment evenly on the surface of the workpiece, particularly the workpiece (including the position prone to electrostatic shielding), a high-performance electrostatic spraying machine should be used to complete the spraying process on the piece of equipment.

Powder spraying processing is laser cut using a laser.

In the spray workshop, create a spray room for your products. Because powder adsorption occurs on the roof and walls of the spray room, it is necessary to use bright lighting panels on the roof and walls. A total of four powder recovery machines have been installed in the four corners of the spray room to recover any remaining powder while preventing powder floating. Spray a uniform layer of powder coating on the surface of the workpiece using the electrostatic adsorption principle; the fallen powder is recovered through the recovery system and can be reused after it has been sieved.

3. Curing at a high temperature

The goal is to:Temperature control is essential in order to melt, level, and solidify the powder coating on the workpiece's surface at a consistent temperature and maintain that temperature at the appropriate time to achieve the desired appearance.

To obtain the finished product, place the sprayed workpiece in the curing furnace (electric oven), heat it to the predetermined temperature (usually 185 degrees), and keep it warm for the corresponding amount of time (15 minutes); remove the workpiece from the curing furnace and allow it to cool to obtain the finished product.

Plastic spraying is also known as electrostatic powder spraying, which is something we hear a lot about. In order to charge the plastic powder and adsorb it on the surface of the iron plate, it makes use of an electrostatic generator. The paint film is then baked at temperatures ranging from 180 to 220 degrees Celsius, causing the powder to melt and adhere to the metal surface, giving it a flat or matte appearance. Acrylic powder, polyester powder, and other types of spray powder are among the most common.