What Are The Types Of Powder Coating Guns?
A powder coating gun is an instrument used in powder coating, a surface finishing method. It comprises placing a dry paint polymer onto the thing to be painted and curing the substance until the paint sets completely. Two different forms of powder coat material are thermosetting and thermoplastic, and various types of wagner powder coating gun need to be utilized for each of these methods.
Thermosetting Powder Coating Guns
Thermosetting powder coating guns have distinct ways of ensuring the paint attaches to the substrate. Though these guns are relatively safe to use and don’t pose much health danger, particular precautions must be taken to assure the user’s safety. All techniques of powder coating work around a single principle; users must use dry paint on a substrate and bake it to ensure that it sets. Powdering coating methods, however, vary in what occurs after the substrate and the dry paint coat are baked.
Thermoplastic Powder Coating Guns
Thermoplastic powder coats retrieve their original chemical arrangement when reheated, whereas thermosetting powder coating is irreversibly cured. The thermoplastic powder coating method requires that the substrate be reduced into a fluidized bed of dry paint powder. The Nordson powder coating gun used in this method is complex sprays that blend the dry powder and air into a compartment.
Thermosetting powder coating is the vastly popular form of this technique mainly because the equipment and material needed are usually simple to procure and relatively inexpensive. In thermosetting powder coating, the powder coating gun, commonly hand-held, sprays the dry paint powder onto the substrate. Then, the substrate is put into a coating oven at a temperature just above the dry powder’s melting point. These guns charge the powder so that it perforates to the substrate. This electrostatic charge can be elicited by friction, a method that tribo-charged Gema powder coating gun, or by a high-voltage corona, a technique used by corona-charged guns.
Other Types Of Powder Coating Guns
Two basic powder coating techniques to consider, each with its strengths and shortcomings: Corona and Tribo. The core discrepancy is how the powder is transported from the Wagner powder coating gun to the part. The force for material transport in the Corona powder coating is an electric field installed between the charged powder cloud and the element. While in the Tribo powder coating, the material transport is from the acceleration at which the powder is extricated from the gun, that is, from the airflow delivered by compressed air.
Corona powder coating guns utilize a high-voltage generator to disassociate air and elicit a stream of positive or negative ions, giving a like charge to the powder cloud. The possibilities of the charged cloud and gun electrode blend to induce an electric field with the opposing pole. Another fundamental difference between Corona and Tribo powder coating is the technique in which the powder particles come to be electrically charged. The Corona powder chafing gun uses a high-voltage generator. In contrast, the Tribo Nordson powder coating gun gives a charge to the powder by physical connection and movement between the powder and a surface.
Conclusion
Powder coating is rising as a prevalent condition of surface finishing not only because it is cheap but also because it is deemed environmentally safe. The dry powder utilized in powder coating contains almost no volatile organic mixtures, and the temperatures needed for curing are so low that a typical household oven can create them. Using a Gema powder coating gun does, nonetheless, produce a large quantity of dust, so defensive gear must be worn throughout the process. Therefore, a fine-filtered mask is a must-have when conducting the powder application procedure.
