Each coating method has different characteristics and practical conditions. The following is a brief analysis of these coating methods and characteristics.
1. air spraying
Put the powder coating spray gun, contract fraud air adsorption force coating adsorbed on the surface of preheated aluminum in advance, by melting on the surface of aluminum powder, can choose thermoplastic and thermosetting powder, if the type is thermosetting powder, even inside the oven curing, the spraying method suitable for small aluminum surface.
2. fluidized bed dip coating method
Aluminum preheating first, then into powder fluidized bed, make the fused to the surface of the aluminum powder, can choose thermoplastic and thermosetting powder, if be thermosetting powder, also want to put into the oven curing, the spraying method suitable film thickness of small aluminum surface, and medium-sized pipe or metal mesh, as well as a full range of dip coating.
3. electrostatic powder spraying
It is currently in use is ordinary a powder coating, electrostatic adsorption of its fraud, make the electrostatic powder coating of feeling farewell with the opposite charge and adsorption onto the surface of the aluminum, thermal spray and cold spray might as well, spray into the baking furnace after drying, the spraying method appropriate differences in size and form of the surface of the aluminum, might as well choose thermoplastic and thermosetting powder.
4. Electrostatic fluidized bed dip coating method
This spraying method will be fluidized bed dip coating method and electrostatic powder spraying two ways of fusion, choose thermoplastic and thermosetting powder, suitable for the film thickness of 150 m under the small aluminum mass production.
5. Electric field halo coating method
The powder coating is charged by placing the thermoplastic or thermosetting powder between two parallel electrodes. The coating material is passed between the electrodes to adsorb the powder on the surface. A fluidized bed is placed under the device and the spray is ejected from the nozzle of the emitter.
6. Charge painting method
Also known as mechanical spraying, the powder is mixed with the glass bead in a certain proportion. The powder is ejected from the emitter’s nozzle and deposited on the surface of the aluminum profile under the charge of the glass bead. This method is suitable for spraying aluminum profiles with a thinner (2-10 m) film.
