Views: 5 Author: Site Editor Publish Time: 2021-07-05 Origin: Site
Spraying equipment is becoming more and more common nowadays, with the improvement of automation, the application of coating production lines is becoming more and more extensive. According to the degree of automation, the current market is divided into three types: manual coating equipment, semi-automatic coating equipment and fully automatic coating equipment. So how to ensure the quality of the coating when spraying? What is the difference between spraying and electroplating?
1. Do a good job of pretreatment. The purpose of pretreatment is to clean the surface of the workpiece. For example, the phosphating film should be qualified, and acid and alkali substances should not remain in order to avoid impurities in the coating.
2. Pay attention to the adaptation of the paint. Generally speaking, the color difference is small, the particles are uniform, and the dry powder coating will be better when used. The environment should also be clean before using the spraying equipment. If it is dry, it should also be dried thoroughly.
3. According to the workpiece thickness and other parameters, set the conversion temperature time and holding time appropriately and reasonably, record the heating curve, including the correct setting of the curing parameters, etc., which can also avoid coating problems.
4. If the coating is sprayed uniformly, the thickness of the coating should be controlled within the range of 70-80μm. At the same time, it can control the parameters of the electrostatic system, the electrostatic voltage, the powder quantity of the spray gun, etc. It can also prevent low powder content and uneven coating.
Compared with electroplated parts, the appearance and process of sprayed parts have been greatly improved. Compared with electroplated parts, the appearance of sprayed parts will be more beautiful and smoother to the touch. Generally, when using aluminum alloy spraying equipment, a salt spray test is also carried out to ensure that the appearance is non-corrosive.
The appearance of electroplated parts is slightly stronger than that of sprayed parts in terms of metallic light perception. However, during the electroplating process, thread damage is easy to occur, causing problems of poor rotation, including large irregular metal parts, and the metal surface is prone to color spots or chromatic aberrations. If it has anti-corrosion properties, it is better not to use aluminum alloy spray equipment.