The spray gun selection for paint viscosity and paint nozzle caliber The nozzle caliber must be selected according to the paint viscosity. Generally speaking, choose a small caliber for the low paint viscosity and a large caliber for high paint viscosity. Pressure-feeding model, small nozzle diameter can be used in a wide range of Automatic Spray Gun low viscosity to high viscosity ◎ Paint viscosity low viscosity (below 15 seconds) medium viscosity (15-25 seconds) high viscosity (25-35 seconds) low pressure model Selection of general-purpose spray guns airbrush abs touch up gun the environmental protection of the earth, spray guns with high spraying rate and low splashing have become the mainstream of the world. The inteal pressure of the air gun cap of the LPH low pressure spray gun is lower than 0.07Mpa, which can achieve high particle size and reduce the low pressure spray gun. Increased VOC emission and improved spraying environment ◎Universal spray gun: This is the model that has been used all the time.

Control step angle: always maintain a vertical 90 degree angle with the sprayed part. As shown in the figure, theit is more likely to produce undesirable effects such as silver accumulation and clouding. Note: The gun speed and distance must be proportional and average. Control steps Control: The trigger is divided into two gears. One gear: pre-spraying air, and can also be used for blowing dust. Two gears: the paint flowing through the nozzle is atomized by the pre-spraying air at the same time; When spraying construction, you must carry out the closing operation. The closing means that the trigger is not pulled at the beginning of the gun, that is to say, the amount of paint is very small at this time, and the amount of paint is gradually increased with the movement of the spray gun until When the gun is about to be moved, release the trigger again to greatly reduce the amount of paint, so as to obtain a natural transition effect. The specific operation methods are divided into two types: one is to spray from the outside to the inside, and move the spray gun steadily.

 When approaching the surface to be sprayed, pull the trigger gradually to spray, and then suddenly and steadily release the trigger, but still keep the arc of the spray gun; the other is to spray from the inside out, placing the spray gun above the spray surface. Press the machine to spray and move the spray gun outwards smoothly. Once the spray gun is close to the mouth area, slowly release the trigger and continue to move the spray gun in an arc.

 control step angle: always maintain a horizontal 90 degree angle with the sprayed part. As shown in the figure, the control step spray patte overlap: general spray guns require a spray patte overlap of 50-60% , And the environmental protection spray gun HVLP requires 70-80%. As shown in the control steps, the gun speed: the spray gun moves at a constant speed, and the spray gun speed is 30-50CM/S. Too fast will make the paint too dry, rough surface and easy to produce orange Skin; Too slow is more likely to cause sagging and falling. For example, when spraying silver powder metallic paint,