The procedure for electrostatic spraying is discussed in detail including the flow of the process as well as the advanta

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The procedure for electrostatic spraying is discussed in detail including the flow of the process as well as the advanta

Posted By George Alice     Mar 24    

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The flow diagram for electrostatic spraying for powder coating, as well as the advantages and disadvantages of electrostatic spraying for powder coating, are shown below.

Specifically, the electrostatic spraying process is based on the technical principles outlined in the following paragraphs:

Because of the appearance of a corona discharge on the workpiece, the powder coating adheres to the workpiece more readily than it would otherwise have done. As described in the procedure, compressed air gas is used to feed powder coating equipment into the spray gun from the powder supply system, and high voltage generated by a high-voltage electrostatic generator is applied to the front of the spray gun in order to achieve the desired result. With the help of compressed air, the powder coating is loaded into the spray gun for application. A full charge develops in the vicinity of the spray gun as a result of the corona discharge that occurs in the vicinity of the spray gun. Charged paint particles are released from the nozzle and are drawn to the workpiece by electrostatic attraction as the spray is being applied to it. In this case, it's due to the diametrically opposed polarities of the charged paint particles and those of the workpiece itself. The amount of charge that accumulates increases in direct proportion to the amount of powder that is sprayed on the surface of the water. When it reaches a certain thickness, it begins to accumulate static electricity, which causes it to become conductive. Wonder Copper (https://www. wondercopper. com/) is a website dedicated to providing information on copper and its applications. Because there is no overhead action, a uniform layer of powder coating is applied to all of the workpieces. A heat source melts the powder coating, levels it out, and hardens it, resulting in the formation of a strong coating film on the surface of the workpiece.


For example, because there is no or very little paint mist floating around in the air, the working environment of employees can be improved. Electrostatic spraying also has a number of advantages, some of which are as follows:

Another advantage of the machine is its ability to automate spray painting technology, which leads to an increase in production efficiency as a result of this.

The use of this method has the potential to save a significant amount of paint when compared to other spraying methods.

4. The smoothness and adhesion of the paint film, as well as its overall quality have both seen significant improvements as a result of the enhancements made to the paint film.

The following are some of the disadvantages of using this method:1. The equipment is in a sloppy state of disarray.

In addition to temperature and humidity, it has a high selectivity for solvents and the quality of the coating is affected by these factors.

The result is that increased caution is required to ensure that the system operates safely because the DC voltage can reach up to 100 kV.

As the surface of the coated object differs in shape from the surrounding environment (for example, the corrugation of the steel barrel versus the circle of the head), changes in the strength of the electric field will occur, which will in turn have an effect on the uniformity of the paint film.

The following is the intended result of the exercise:In order to ensure that the powder coating is evenly applied to the surface of the workpiece, particularly the workpiece (including the position prone to electrostatic shielding) and the workpiece, a high-performance electrostatic spraying machine should be used to complete the spraying process on the piece of equipment.

With the assistance of a laser, the powder spraying process is laser cut to perfection.

Set up a spray room in the spray workshop for your products that will be used in the spraying process. To prevent powder adsorption on the spray room's roof and walls, it is necessary to install bright lighting panels on the roof and walls of the spray room to illuminate the roof and walls of the spray room. In order to recover any remaining powder and prevent powder floatation, four powder recovery machines have been strategically placed in each corner of the spray room. In order to spray a uniform layer of powder coating on the surface of the workpiece, the electrostatic adsorption principle is used; the fallen powder is recovered through the recovery system and can be reused after being sieved.


The third step involves curing the product at a high temperature.

A consistent temperature must be maintained on the workpiece's surface throughout the process in order to melt, level, and solidify the powder coating equipment. Temperature control is also necessary in order to achieve the desired appearance.

When the sprayed workpiece is placed in the curing furnace (electric oven), it is heated to the predetermined temperature (typically 185°F) and maintained at that temperature for the appropriate amount of time (15 minutes); after that, it is removed from the curing furnace and allowed to cool, the finished product can be obtained.

In the plastics industry, electrostatic powder spraying is also referred to as plastic spraying, and it is a term that is frequently heard. During the manufacturing process, this device makes use of an electrostatic generator to charge the plastic powder and cause it to adsorb on the surface of the iron plate. Bake temperatures range from 180 degrees Celsius to 220 degrees Celsius, which causes the powder to melt and bond with the metal surface, resulting in a flat or matte finish on the painted film. Acrylic powder, polyester powder, and a variety of other types of spray powder are among the most commonly used types of spray powder in the industry.

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