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| What is the application principle of electrostatic powder coating equipment? |
| 点击：4621 发布单位：www.gdhongma.cn 发布时间： 2017-06-23 |
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What is the application principle of electrostatic powder coating equipment?:
Because the powder coating does not contain organic solvent and water, it is in the state of solid powder, which determines that it is obviously different from traditional solvent and water soluble coatings in the construction process. The spraying process can be divided into two types: thermal spraying and cold spraying. Thermal spraying is performed by heating the powder coating to melt, then coating it onto the workpiece and leveling it out to form a coating film. Cold spraying is to apply powder to the workpiece in a variety of ways at room temperature, and then use heating or radiation curing method to make the coating hot melt, leveling and forming a good coating method. Which belongs to the spraying is powder electrostatic spraying method, according to the principle, can be divided into high voltage electrostatic spraying and friction electrostatic spraying two, equipment also according to these two to distinguish.
The electrostatic powder coating equipment is used with spray nozzle (paint spray) and discharge electrodes (current) of the coating machine to paint particles, and impose charges on the particles, thereby forming an electric field between the electrode and the object to be coated, coating by electrostatic adsorption.
Main features of electrostatic powder coating equipment:
1, manual, automatic or manual plus automatic coating equipment.
2, recyclable powder, recycling rate of more than 98%.
3, suspension transportation system, a high degree of automation.
4, coating microporous small, good corrosion resistance, can be a thick film coating equipment.
Friction electrostatic spraying does not require a high voltage electrostatic generator for use in high-voltage electrostatic spraying. There is no need for a high voltage electrostatic plant between the powder gun and the workpiece. The key is that its powder spray gun is made of strong negative material, when two kinds of electrical negative materials are different
When the material is friction, the weak and negative material will bring positive electricity, while the strong negative material will bring negative electricity. When using a powder coating with an electric negative film, the friction between the powder coating particles and the friction between the powder and the gun made of the strong negative material will lead to the positive charge of the powder particles. So in the selection of suitable materials making gun, powder in the compressed air driven motion in the gun body when the friction generated with a positive charge, continued to promote the flow of air, would fly to the ground and was adsorbed on the workpiece, after curing after this film will form a layer of loose film of uniform and continuous smooth. |
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