Problems in the actual production and use of water curtain vortex spray paint room Although the water curtain scroll spray paint room in the paint mist treatment relatively improved a lot, but due to the domestic coating equipment manufacturers, the size of many different equipment manufacturers, excessive pursuit of profits, not much investment in research and development and their own technical standards and the use of business blindly reduce the investment cost of equipment re
Pretreatment process: phosphating and degreasing Quality phosphate film can only be formed on the surface of the workpiece where the oil is removed thoroughly. Because, oil residue on the surface of the workpiece, not only will seriously impede the growth of phosphate film, but also affect the adhesion of the coating film, drying properties, decorative properties and corrosion resistance. Table 1-5 Effect of degreasing and cathodic electrophor
Pre-treatment equipment management and maintenance Pre-treatment equipment in operation should be routine maintenance and regular maintenance, maintenance content and maintenance frequency is shown in Table 3-5 and Table 3-6. Table 3-5 Pre-treatment equipment routine maintenance Inspection items Item Standard Remarks
Detailed introduction of sandblasting rust removal technology knowledge General knowledge of sandblasting rust removal Sandblasting to remove rust is to use compressed air as the power to form a high-speed jet beam to spray material (copper ore, quartz sand, diamond sand, iron sand, Hainan sand) at high speed to the surface of the workpiece to be treated, so that the appearance or shape of the outer surface of the workpiece surface
How to choose the different types of phosphating process According to the operating temperature, can be divided into high-temperature phosphating, medium-temperature phosphating, low-temperature phosphating. 1) low-temperature phosphating, at room temperature, long processing time, in addition to medium-temperature phosphating has been added to the composition, in order to accelerate the speed of phosphating, but also add fluoride, the advantage of low-temperature wo
Things to note in the process of electrostatic coating 1.Spraying voltage 1.1 In a certain range, when the spraying voltage increases, the powder adhesion increases, but when the voltage exceeds 90KV, the powder adhesion decreases with the increase of voltage. 1.2 When the voltage increases, the initial growth rate of the powder layer increases, but with the increase of the spraying time, the effect of voltage on the increase rate of the powder layer thickness becomes smaller. 1.3 Whe
Maintenance of nozzles during the coating pre-treatment process 1 Causes of nozzle failure 1.1 Erosion. When the high flow rate of liquid passing through the nozzle hole at the metal surface, it will produce erosion of the nozzle hole, resulting in lower nozzle pressure, spray state becomes irregular. The chance of erosion of the nozzle depends on the hardness of the liquid, spray pressure, the type of chemical material used and its dosage. In addition, the particles in the
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