Coating is an important part of surface manufacturing process. The quality of coating is one of the most important aspects of the overall quality of the product. Product appearance quality not only reflects product protection, decoration performance, but also constitutes an important factor of product value. The painting equipment is a crucial part of the whole painting process. Coating equipment is divided into powder coating equipment, paint coating equipment, electrophoresis coating equipment, electroplating coating coating, etc., the above 4 categories are one of the international common practices.
Today we focus on the powder coating equipment, powder coating roughly divided into spraying and dipping two processes. The following are the main components of spraying.
Introduction to powder spraying
Electrostatic powder spraying technology uses electrostatic principle to surface treatment of the workpiece, so the whole powder spraying process also needs a complete set of powder spraying equipment to implement. According to the powder spraying method and the powder material itself recyclability. Generally speaking, the powder spraying equipment includes powder electrostatic spray gun (spray gun control device), recovery device, powder room and powder feeding device. The combination of these devices makes the whole powder spraying process can form a complete cycle. The powder is sprayed to the workpiece by the spray gun, and the powder that has been sprayed or not adsorbed to the workpiece is recovered by the recovery device. This part of the powder is transported to the powder feeding device and then re-supplied to the spray gun for recycling.
Powder electrostatic spray gun
Depending on the high voltage static electricity to "transport" the powder to the workpiece to be sprayed, its electrostatic and aerodynamic properties directly affect the primary powder powder rate and film thickness control.
Recycling equipment
The usual recovery device has two main forms, such as filter cartridge or double cyclone. Filter element recovery depends on high performance filter device (filter element), such as the lower left picture, can recover more than 99% of the powder spray, its simple structure, convenient maintenance. Now the market is the vast majority of books monochrome (or color less variety) spraying users will use filter recovery. The double whirlwind recovery device is mainly used in the color changing spray room, because it can often bring faster color replacement efficiency. Most of the enterprises with more frequent color change will choose double cyclone as the recycling device of their dusting equipment
Powder room
Powder room will be the whole spraying process wrapped in a relatively closed environment, after accurate calculation and reasonable processing, powder in which will not spill, will not cause pollution to the environment, and can be recycled and used. The usual powder room wall materials are PP, PVC to special Apogee, etc. Ω spray room
Ω spray booth adopts top air supply on three sides, and the use of paint filter cotton to collect paint mist. When spraying the workpiece, the paint mist enters the ventilation system with the air. The paint particles adsorb onto the filter cotton and the treated air is discharged into the atmosphere. The spraying system of Ω spray booth is composed of vertical reciprocating mechanical elevator driven by frequency conversion motor, turbine motor (high speed, low noise), disc, built-in high voltage system, eight-section microcomputer control system, (containing safety device, alarm device, pneumatic control system) compressed air micro filtration device, insulation material, etc.
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