The use method and operation elements of air spray gun

1 Use method 1.1 adjust the coating pressure (generally 0.15-0.25mpa) of air pressure (generally about 0.5MPa) according to the process requirements 1.2 connect the air pipe to the compressed air supply station 1.3 connect the paint delivery hose to the paint supply station 1.4 connect the compressed air inlet pipe to the spray gun air pipe joint 1.5 connect the coating delivery hose to the coating pipe interface of the spray gun 1.6 open the valves of paint supply station and compressed air supply station, and adjust the spraying sector by adjusting the component rod 2 operation elements 2.1 spraying distance spraying distance refers to the distance from the spray nozzle of the spray gun to the coated object The standard spraying distance is 20-30cm for large spray gun, 15-25cm for small spray gun and 25-30cm for air atomized portable electrostatic spray gun At present, Chery Automobile Co., Ltd adopts air spraying distance of 15-25cm If the spraying distance is too close, the film formed in unit time is thick, which is easy to produce sagging; if the spraying distance is too far, the film is thin, and the loss of the coating increases, and if it is serious, the film will have no luster 2.2 operation mode of spray gun: the operation state of spray gun includes two aspects: the angle between spray gun and coated surface and the operation speed of spray gun Keep the spray gun running in a right angle and parallel to the surface of the coated object The movement speed of the spray gun is generally adjusted within the range of 30-60cm / s, and it is required to be constant If the spray gun is tilted and runs in the arc track or the running speed is variable, the coating with uniform thickness cannot be obtained, which is easy to cause the defects such as blooming, orange peel and sagging of the coating 2.3 the width of the spray pattern should be kept at a width of 1/4 (1/3) If the lap width is variable, the film thickness will be uneven, and the film is prone to defects