1.Master the spraying pressure. To select the correct spraying pressure, many factors need to be considered, such as the type of coating, the type of thinner, the viscosity after dilution, etc. During spraying, the liquid material shall be atomized as much as possible, and the evaporation of solvent contained in the liquid material shall be as little as possible. Generally, the regulating pressure is 0.35-0.5 MPa or test injection is conducted. In order to achieve the desired effect, it is necessary to develop a good habit of strictly following the construction parameters provided by the paint manufacturer’s product manual.
2.Master the form of fog. It is very important to measure the fog on the covering paper before spraying, which is a comprehensive measurement of the spray gun distance and air pressure. During the test, when the palm is open, the distance between the nozzle and the wall is about the width of one hand. Pull the trigger to the bottom and release it immediately. The sprayed paint will leave a fine mark on it.
3.Master the movement speed of the spray gun. The moving speed of the spray gun is related to the drying speed of the coating, ambient temperature and coating viscosity. Generally, the moving speed is about 0.3m/s. If the moving speed is too fast, the paint film will be rough and dull, and the leveling property of the paint film is poor. Moving too slowly will make the paint film too thick and hollow. The speed of the whole process must be consistent.
4.Master the spraying method and route. The spraying methods include vertical overlapping method, horizontal overlapping method and vertical and horizontal alternating spraying method. The spraying route shall be from high to low, from left to right, from top to bottom, and from inside to outside. Move the spray gun steadily according to the planned travel, release the trigger when reaching the end of the one-way travel, and then press the trigger to start spraying the original line in reverse.
Post time: Oct-27-2022