High-pressure airless spraying equipment has been widely used in the market, but there are many people who want to use it but do not know its precautions. So what are the precautions for high pressure airless spraying equipment? 1. Correct spraying posture. The correct spraying posture can make the high pressure airless spraying equipment spraying operators handy. When operating, pay attention to the coordination of the position between the body, the spray gun and the hose. When the operator stands spraying, the feet are slightly wider than the shoulder, holding the hose in one hand and the spray gun in the other hand.
2, the correct operation of the spray gun. When holding the gun in your hand, hold the trigger with your index and middle fingers, but not too tight. When spraying, the gun body should be perpendicular to the spraying surface, and the running track of the spray gun should be parallel to the spraying surface, so as to ensure uniform coating thickness. During operation, if only the wrist drives the spray gun movement, a large amount of flying paint will be produced, and more paint will fall in the position of the workpiece and the spray gun in the vertical direction, and less paint will fall in other positions that are not vertical. Therefore, the wrist, elbow and shoulder of the operator of the high-pressure airless spraying equipment need to be moved at the same time, but the wrist and forearm movement causes the spray gun to make an arc movement, so that the spray gun is not parallel to the coating surface. 3, the distance between the spray gun and the workpiece surface. When spraying, the entire spraying process should keep the same distance, generally 25~ 40cm. The spraying distance is too close, easy to form rebound or overspray; The distance is too far, easy to make the paint fog can not completely and evenly fall on the surface of the workpiece, resulting in a decrease in the spray rate.
4. The moving speed of the spray gun. High pressure airless spraying equipment when spraying, in order to maintain the appropriate amount of paint outflow, the spray gun needs to maintain a reasonable moving speed. The moving speed of spray gun is too slow, the outflow of paint increases, and the coating film will appear orange peel or flow hanging phenomenon; On the contrary, the moving speed of the spray gun is too fast, which will cause the spray painting rate of the coated surface to be too low, and the moving speed of the spray gun should be appropriately reduced. 5, the correct nozzle aperture and spray width. In the same spray width, the larger the aperture, the thicker the film formation; With the same nozzle aperture, the larger the spray width, the thinner the film will be.
6. Correct lap of spray pattern. In order to form a uniform coating on the workpiece, the operator of the high-pressure airless spraying equipment needs a certain overlap in the spray position of the spray gun for each spray stroke. Because the airless spraying pressure is large, and the flow rate and pressure in the spraying sector are more uniform, the thickness of the coating film in the spray pattern is more uniform, and the amount of overlap between them can also be smaller on the basis of ensuring the overlap connection to reduce the phenomenon of leakage.
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