Common mistakes of electrostatic powder spraying machine
Myth 1: the higher the spray gun voltage, the faster the powder, the better
Problem resolution
(1) according to the basic physical principles of electrostatic spraying, when the charging voltage exceeds a certain value, it will intensify the occurrence of "Faraday effect" and "deionization effect" and even affect the powder rate.
(2) high voltage of electrostatic powder spraying machine is easy to cause the phenomenon of tip ignition, easy to leave pinholes in the appearance of the workpiece, resulting in poor apparent quality.
(3) high pressure ignition will increase the phenomenon of dust combustion in dusting room. Therefore, the actual use of the process should be based on the characteristics of the powder, the characteristics of the workpiece and so on adjust the voltage to the appropriate stage to obtain a better spraying effect.
Myth two: simple shape workpiece can be used worse performance of electrostatic powder spraying machine
(1) some operators think that the shape of the workpiece is simple, so they do not need a good performance spray gun. In fact, a good performance spray gun not only has a strong adaptability to shape, but also has a more important uniform level of powder delivery state, which can achieve better apparent coating and powder coating rate, and a higher powder coating rate can save powder and reduce production cost.
(2) good electrostatic performance will also accelerate the production speed and improve the work efficiency.
(3) even powdering will also reduce the scrap rate, making the production management easier.
(4) poor performance of electrostatic powder spraying machine due to the use of components performance is poor, the failure rate will be much higher, even if the manufacturer timely maintenance will inevitably delay production. Therefore, the shape of the workpiece is not a reason to choose a poor performance spray gun.
