Electrostatic spraying equipment is a type of high-precision spraying equipment. This type of equipment is composed of electrostatic Spray Guns, high-voltage electrostatic generators, and pressure paint tanks. The characteristics of spraying with electrostatic spraying equipment are that the sprayed paint mist has high density, good atomization, less paint mist flying, less paint waste, high work efficiency, and less air pollution, which can greatly improve the construction environmental conditions of spraying. It is beneficial to form a continuous production line or an automatic spraying production line.
①Electrostatic spraying principle Electrostatic spraying is to use the effect of high-voltage electric field to refine the paint mist sprayed by the electrostatic Spray Gun and make it charged, and deposit the paint mist on the surface of the workpiece with different charges under the action of electrostatic gravity. Painting method. Due to the good atomization of the paint mist, the formed paint film is fine and smooth, with strong adhesion and good decoration. At the same time, due to the gravitational effect of static electricity (attraction of positive and negative charges), the paint mist after spraying can be almost completely absorbed on the surface of the object to be coated, unlike other spraying constructions that have a large amount of residual paint mist ( #+ , around) Flying into the air and being wasted, the paint is saved, the construction environment is purified, the working conditions are improved, and the spraying efficiency and quality are improved.
②Types of electrostatic spraying equipment At present, there are many types of electrostatic spraying equipment used in automobile painting and painting, such as large-scale gantry electrostatic automatic spraying equipment, small robotic electrostatic automatic spraying equipment, portable electrostatic spraying equipment, mobile electrostatic spraying equipment , Disc electrostatic spraying equipment and so on.
Large-scale gantry electrostatic automatic spraying equipment is mainly used for automatic spraying of large and medium-sized bus bodies (such as the external large roof of the body and the large panels on both sides), and is mainly suitable for the spraying of the painting production line of large and medium-sized bus manufacturers, such as For a 9-11 meter long bus, it takes 18-20 minutes for each vehicle to continuously spray two coats, and for a 7-8 meter long medium-sized bus, it takes about 15-16 minutes for each vehicle to spray two coats continuously, which greatly improves production efficiency. At present, the larger domestic bus manufacturers, such as Zhengzhou Yutong Bus Manufacturing Plant and Jiangsu Yangzhou Yaxing Bus Manufacturing Plant, all use large-scale gantry machine electrostatic automatic spraying equipment to spray the body topcoat, which has achieved better quality and economical efficiency. benefit.
Small manipulator electrostatic automatic spraying equipment is mainly suitable for automatic spraying of parts, such as the top coat of various parts of cars.
Other electrostatic spraying equipment needs to be mastered manually when spraying.
③Application of electrostatic spraying equipment The scope of application of electrostatic spraying equipment is very wide. However, since the sprayed coating is mainly topcoat, and the paint used for spraying needs to be electrostatic paint and electrostatic thinner, the paint needs to be baking varnish. It is used for spraying self-drying paint or quick-drying paint. It is not suitable for electrostatic spraying equipment for primers containing more pigments, otherwise it is easy to block the air hole of the Spray Gun and damage the Spray Gun. In addition, the investment of electrostatic spraying equipment is large. Therefore, it is limited in the industry of automobile repair painting, color changing painting and refurbishment painting. However, for large-scale automobile rework and painting, the use of electrostatic equipment still has great practical significance.
