Electrostatic Liquid Spray Guns
Electrostatic liquid spray guns are the most widely used and versatile electrostatic tool. They are the most effective method of applying static discharge (SD) to metallic surfaces. A static discharge produces a powerful electrostatic charge that transfers power between two charged poles, one fixed and one movable, when the product or material passes through it. Thus, static discharge is a very important concept in industrial applications. It is essential for various industrial applications, such as in the process of material removal, sealing, etc. The electrostatic liquid spray gun acts by releasing the static charge on the movable part, thereby inducing a current that is beneficial for that part.
The electrostatic liquid spray gun consists of two parts, namely, the gun body and a fixed nozzle adapted for spraying liquid or a combination of liquid and solvent-based paint. The body contains a supply of either a low-voltage or a high voltage battery and the fixed nozzle is adapted to spray a solvent-based paint or liquid. The body also contains a mixing tank and a control unit for providing electrical power to the gun.
There are several types of electrostatic liquid spray guns. The most common type is the electrostatic gun body made of steel or aluminum and has a rubber or plastic tip. It is available in different sizes and can be easily attached to the job-site with the help of a clamp. The body is equipped with a movable portion and it is designed in such a way that the movable portion comes into contact only with the electrically charged surfaces.
An electrostatic gun body is used to spray both oil and water-based paints. The water-based paint is usually used for interior doors and windows while the oil paint is used for exterior purposes. Both the paints can be sprayed from the gun using a different nozzle depending on the kind of paint being applied. However, the efficiency of the system depends upon the purity of the spray and the distance between the nozzle and the target surface.
High-pressure air guns are another form of electrostatic spray guns. These guns create a bubble of pressurized gas within the container. As the gas bubbles reach the target, they react with the charged particles present on the surface and the end result is a charge depletion. This results in the production of a vacuum effect which forces the charged particles to the opposite direction thereby eliminating the need for water-based paint to be used.
Electrostatic air guns are basically very similar to the subsonic air guns. However, they are more powerful than the latter. Electrostatic guns discharge a stream of static charges when a charge is fired. While these guns discharge static charges by the presence of a small discharge line, the air guns do not need this discharge line. Air guns work on the principle of the same amount of pressure within a very small space to produce the required effects.
Liquid spray guns are relatively new in comparison to other types of electrostatic tools. Electrostatic guns use compressed air or nitrogen to create the necessary charge. Nitrogen is a highly efficient and safe chemical that produces the charged particles needed by the gun. The compressed air is discharged from the gun barrels through vents and nozzles and the result is a shooting of small particles of dust, dirt and debris at very high velocity.
Electrostatic guns can be either gas-operated or compressed air powered. Both types of gun barrels produce the same results but with slightly different delivery patterns. Gas guns, as the name implies, operate using compressed gas to shoot the spray. While air guns operate with the help of an air compressor to shoot the spray into the air, both types are equally effective when spraying a large area.