[China Glass Net] 1. Adjust the coating to a suitable spray viscosity with a clean thinner or water. The viscosity is usually 18 to 30 seconds measured by a coating-4 viscometer. If there is no viscometer at one time, visual method can be used: stir the coating with a rod (iron rod or wooden stick) and pick it up to a height of 20 cm to stop, such as the paint liquid is continuously lined in a short time (a few seconds). It is too thick; if it is off the edge of the barrel, it is too thin; when it is stopped at 20 cm, the paint liquid is in a straight line, and the instantaneous flow is turned into a downward drop. This viscosity is more suitable. Rayon Twill Fabric,Rayon Twill Spandex Fabric,Spandex Stretch Fabric,Twill Spandex Woven Fabric Shaoxing Shenwang Trading Co., Ltd , https://www.swcientex.com
2. The air pressure is preferably controlled at 0.3-0.4 MPa (3-4 kgf/cm2). If the pressure is too small, the spray liquid will be atomized, and the surface will form a pitting. If the pressure is too large, it will sag and the paint mist will be too large, which will waste materials and affect the health of the operator.
3. The distance between the nozzle and the object surface is generally 200-300 mm. It is easy to sag too close; the fog of the coating is too uneven, and the pitting is easy to occur, and the nozzle is far away from the surface of the object and the fog is scattered on the way. The specific size of the distance should be appropriately adjusted according to the type, viscosity and pressure of the glass paint. The slow-drying paint can be sprayed a little farther away, and the viscosity can be farther when the viscosity is thin. When the air pressure is high, the distance can be farther, and the pressure can be closer to the point; the so-called near-a little point refers to the adjustment between 10 mm and 50 mm. If it exceeds this range, it is difficult to obtain a desired coating film.
4, the spray gun can be moved up and down, left and right, preferably at a speed of 10-12 m / min, the nozzle should be straight to the surface of the spray, to minimize the oblique spray. When spraying on both ends of the object surface, the hand of the trigger of the spray gun should be loosened quickly to reduce the paint mist, because the two ends of the object surface often need to be sprayed twice or more, which is a place that is more likely to cause sag.
5. When spraying, press the next one to hold 1/3 or 1/4 of the previous one, so that there will be no leakage. When spraying quickly, it needs to be sprayed in sequence. The effect of refilling is not ideal.
6, the order of spraying is: first difficult and easy, first and then outside. After the height is high, the small area is small. This will not cause the spray mist of the post-spray to splash onto the sprayed coating film, destroying the sprayed coating.