Coating Attack - Electrostatic Spray method of powder coating

, the spray voltage1, in a certain range, the spray voltage increases, the powder attachment increases, but when the voltage exceeds 90KV, the powder attachment decreases with the increase of voltage2, the initial growth rate of the powder layer increases when the voltage increases, but with the increase of spraying time, the voltage has less influence on the increase rate of powder thickness3, when the spray distance (refers to the distance from the gun head to the surface of the workpiece) increases, the voltage on the thickness of the powder layer is lessGeneral distance should be between 150-300mm4, the spray voltage is too high, will make the powder layer break through, affecting the quality of the coatingThe spray voltage should be controlled between 60-90KV2, powder pressurepowder pressure refers to the air pressure of the powder tube in the powder supply, in other conditions unchanged, with 0.05MPa (1.96 kg force pressure) as the bestthree, the amount of powder spraythe amount of powder spray refers to the amount of powder in the unit timeThe initial growth rate of powder thickness is proportional to the amount of powder spray, but with the increase of spraying time, the effect of the spray amount on the thickness of the powder layer is not only smaller, but also reduces the deposition efficiency, so it is more appropriate to master the amount of powder in 100-200g/minfour, spraying distancespray distance refers to the distance from the spray gun to the surface of the workpiece, when the electrostatic voltage applied by the spray gun does not change, the spray distance changes, the intensity of the electric field will also changeTherefore, the size of the spray distance directly affects the thickness and deposition efficiency of the powder adsorption of the workpieceThe best distance is about 250mm