Mixed-air spraying is also called air-assisted spraying (AA-type spraying). As the name implies, this method is a combination of air and airless spraying. The quality of air spray is better, but the paint wave is larger and the film is thinner; while the airless spray has higher efficiency, lower coating waste, and thicker film, but the effect is slightly poorer. What kind of method can be used to retain the advantages of the two spraying methods and avoid their disadvantages? AA spray is produced on this basis. AA spray is to add a certain pressure (less than airless spray) to the paint, so that the paint itself can be atomized, while adding a small air pressure (usually not more than 2 kg) to adjust its complete atomization, The process is actually a secondary atomization process.
Several spraying methods and comparison:
Air spray
Airless spray
AA spray
Electrostatic spraying
Spray quality
it is good
better
it is good
the best
Transfer efficiency
15-30%
20-40%
30-60%
70-90%
Pollution degree
Great
Smaller
small
Very small
Work efficiency
in
Smaller
small
Very small
Coating thickness
thin
thick
Thicker
thick
Nozzle life
long
medium
Long (wear-resistant Tsui)
long
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