Plastic spraying reciprocating machine talks about spraying methods and skills

1 Gently disturb the gun handle with the ring finger and little finger, hook the trigger with the index finger and middle finger, and hold the gun grip in the mouth of the gun; when spraying, the eyes will move with the gun, pay attention to the condition of the coating film and the point of paint mist. The spray distance and verticality of the nozzle and the workpiece are controlled by the body. When the spray gun moves, the body should be used to match the movement of the arm. The wrist cannot be moved, but the wrist must be flexible. When the spray gun is running, keep the spray gun at a right angle to the surface to be coated, and always keep the gun in parallel. The moving speed of the spray gun is generally controlled within 0.3-0.6m/, and try to keep moving at a constant speed, otherwise it will cause uneven film thickness and other phenomena; the distance between the spray gun and the surface to be coated should be between 0.2-0.3m. Too close, the paint film is prone to uneven thickness, uniform drying speed, and sagging appearance; too far, the solvent of the paint evaporates in the paint mist, causing orange peel.

3 During the spraying operation, the edge of each spraying range should be repeated 1/3-1/2 (the width or area of the overlap between the two paint marks) and the width of the overlap Should be consistent, otherwise the thickness of the paint film is uneven, and sometimes stripes or marks may occur. When performing multiple repetitive sprays, the direction of movement of the spray gun should be perpendicular to the sprayed side of the previous paint to make the coating more uniform. When spraying, the spray gun trigger should be turned on when the spray gun moves, and the spray gun trigger should also be turned off when the spray gun moves. Otherwise, it is easy to miss or over spray on the appearance of the sprayed parts. 4 Solving common problems in air spraying In actual production, air spraying often has some spraying defects. If it is not corrected in time, it will affect spraying quality. 1 When spraying, if the paint mist is excessively atomized, the adhesion of the paint liquid on the surface of the parts will be reduced. This is mainly due to excessive air pressure and insufficient output of paint. At this time, the air pressure should be appropriately reduced to increase the amount of paint delivered. When spraying is insufficient, spray gun work is interrupted. This is mainly because the air pressure is too small, and the air pressure should be increased appropriately.

5j spray density is uneven or spraying intermittently. This is mainly because the air vent or spray hole of the nozzle is blocked, or the paint has been used up. At this time, simply spray the nozzle or add paint to resume normal spraying. 4 The main reason for the phenomenon of spraying when starting to spray is that the thimble of the spray gun does not cross the open air channel. Adjust the nut at the end of the thimble so that the thimble passes the air channel. 5 If the spray gun can only spray out a circular paint mist flow, it cannot be adjusted into a flat paint mist flow. This is mainly due to the blockage of the air outlet on the nozzle. After cleaning the air outlet, it can be adjusted into a flat paint mist flow.

6 Paint liquid (seepage) from the nozzle end. This is mainly caused by the clogged spray gun or improperly closed thimble, or the nozzle is worn or not tight. Clean the nozzle or tighten the nozzle. If it is damaged, replace it with a new one, and the paint leakage can be eliminated. In short, as long as you control the construction environment and master the methods and techniques of air spraying, you can get the ideal spraying effect. Paint the exterior of furniture products to be pleasing to the eye.

Air spraying equipment Air spraying is a spraying method that uses compressed air to atomize paint. It is widely used in automobiles, furniture and all walks of life. It can be said to be a convenient operation, easy to change colors, good atomization effect, and can be carefully modified. High-quality surface coating method