There are many methods of surface treatment of industrial aluminum profiles, one of which is powder coating. Aluminum profile powder spraying equipment (electrostatic spraying machine) is used to spray powder coating to the surface of the aluminum profile, under the action of electrostatic, powder will be uniformly adsorbed on the surface, forming a powdery coating, to partition the air, and prevent corrosion and oxidation.
1. Air Spraying Process
The powder coating is placed in the spray gun, and the adsorption force of compressed air will be adsorbed on the surface of the preheated aluminum profile. The powder is melted on the surface of the aluminum profile, and thermoplastic and thermosetting powder can be used but also into oven curing if it is a thermosetting powder, which is suitable for small aluminum profile surfaces.
2. Fluidised-bed Dipping Process
Firstly, the aluminum profile is preheated and then immersed in the powder coating fluidized bed so that the powder is fused to the surface of the aluminum profile, thermoplastic and thermosetting powder can be used, if it is thermosetting powder, also into the oven curing, this spraying method is suitable for small aluminum profile surface with thick film, as well as medium pipe or metal mesh, can be fully immersed coating.
3. Electrostatic Powder Spraying
It is a more widely used powder spraying method, which uses the principle of electrostatic adsorption, and the electrostatic induction powder coating respectively with the opposite charge and adsorption to the surface of the aluminum profile, hot spray and cold spray can be sprayed, but also into the baking oven drying, this spraying method is suitable for the size and shape of the aluminum profile surface, using thermoplastic and thermosetting powder can be.
4. Electrostatic Fluidized-bed Dipping Process
This spraying method is a combination of fluidized-bed immersion coating and electrostatic powder spraying, using thermoplastic and thermosetting powder, suitable for the mass production of small aluminum profiles with a film thickness of less than 150μm.
5. Electric Field Halo Coating Process
The thermoplastic or thermosetting powder is placed between two parallel electrodes so that the powder coating is charged, the coated material passes through the electrodes, so that the surface of the powder adsorption, the device to be placed under the fluidized bed, the spray from the nozzle of the jet, suitable for spraying thin coating (10-20μm) small aluminum profile.
6. Impact Coating Process
This spraying method is also called the mechanical spraying method, powder with different particle sizes and glass beads by a certain proportion of mixed, sprayed by the nozzle of the injector, powder deposited on the surface of the aluminum profile under the impact of the glass bead, which is suitable for spraying thin film layer (2-10μm) of aluminum profile.
Guangdong Zhonglian Aluminium Profiles Co., Ltd. is a large-scale comprehensive aluminum profile factory specializing in developing, designing and manufacturing aluminum extrusions. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in construction industry and other industries. We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!
