An electrostatic spray gun is a type of device used for applying a coating, such as paint or powder, to a surface. It operates by charging the particles of the coating material with a negative or positive electric charge, which then attract to the opposite charge of the surface being coated. In this article, we will explore what electrostatic spray guns are, how they work, and why they are important.
What is an electrostatic spray gun?
An electrostatic spray gun is a tool used to apply a charged coating to a surface by utilizing the principles of electrostatics. By imparting a charge to the coating material as it is sprayed, the particles of the coating become attracted to the surface of the object being sprayed, creating an even, uniform coating.
How do electrostatic spray guns work?
Electrostatic spray guns operate based on the principles of electrostatics, which states that particles that have the same charge will repel each other, while particles with opposite charges will attract. The electrostatic spray gun charges the paint, powder or other coating material with a negative or positive charge as it exits the nozzle, creating a fine spray of charged particles. When these charged particles reach the surface being coated, they are naturally attracted to the opposite charge of the surface, creating an even and uniform coating.
Why are electrostatic spray guns important?
Electrostatic spray guns play a significant role in the coating industry, primarily due to the following reasons:
Increased efficiency: Electrostatic spray guns deliver a more efficient transfer of the coating material to the surface being applied, resulting in a reduction of overspray and waste.
Improved quality: The charged particles delivered by an electrostatic spray gun create an even and uniform coating, resulting in a higher quality and more professional finish.
Environmentally friendly: Electrostatic spray guns reduce the amount of coating material necessary for a project, resulting in reduced waste and environmental impact.
In summary, electrostatic spray guns are essential tools in the coating industry. They offer increased efficiency, improved quality, and environmental benefits compared to traditional spray methods. When used correctly and maintained regularly, electrostatic spray guns can provide a valuable tool for a range of coating applications.
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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Application of plastic in rolling bearings (4) Application of plastic in rolling bearings (4)
The same; the use of plastic bearings when the radial cooperation gap is larger than the metal bearing. For example, for carbon fiber filled PTFE; usually take the bearing inner diameter gap (0. 006-0. 015) D; D is the shaft diameter (mm) Under normal circumstances; the total radial clearance shall not be less than 0.1 mm (when D < 10 mm; its void value may be less than 0.1 mm); this will prevent the bearing from being locked due to data expansion. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
The size of the thermal expansion coefficient is closely related to the precision of the product. Generally, the decrease of the coefficient of thermal expansion will reduce the shortening rate of the data and improve the precision of the product; therefore, the value of the clearance of the plastic bearing is reduced; the precision of cooperation is improved; The coefficient of thermal expansion decreases. Others need to pay attention to fiber reinforced plastics; because of the orientation of the fibers in the active direction; the coefficient of thermal expansion in the direction of motion is greater than the straight direction; the anisotropy of the attack; Qu; scale stability is worse.
Relatively moving parts must have high rigidity and a certain hardness difference. The inner and outer rings and the rolling body of the metal bearing; there is a certain hardness difference between the rolling element and the material of the cage. This is for plastic bearings; The same needs.
The hardness of plastics is closely related to the rigidity. Any method that can improve the rigidity of the data has the effect of improving the hardness.
When plastics cooperate with different materials, different types of wear will occur. When the meshing material is metal; when it cooperates with harder metals (such as steel), the wear is better. When 虢 æ–«é¹— (such as brass, aluminum alloy, etc.) Wear is large. If the metal surface is not flat, it will cause “erosion wearâ€. If the metal surface is very lubricated, it will have “adhesive wearâ€. When the meshing material is dissimilar resin, the adhesive wear will usually be larger; the degree depends on the type. If PBT, PA and POM have poor affinity; it is not easy to attack and wear; while ABS, PP and POM are prone to adhesive wear. When the meshing data is the same resin; its conflict wear characteristics are better than those with metal or dissimilar resin. The time is much worse; the adhesive wear is much larger; this aspect is due to the difference in hardness; on the other hand, the heat resistance of the resin is poor; the thermal conductivity is lower than that of the metal; especially under high pressure; the sliding surface The attack is abnormally high temperature and creeps; the hardness decreases; the adhesion is greatly promoted; together, it is very simple to declare sharp noise and even lock.
There is no difference in hardness between the same type of data; it is easy to incur a large conflict in relative motion; many conflicts of heat are stored on the conflict surface; the resin is softened or even melted; the conflict resistance is further expanded, and the resin and metal There is a difference in hardness between them; the coefficient of conflict is better than that of the scorpion 诘 诘 诘 龋 钤谀Σ撩嫔 钤谀Σ撩嫔 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 Hey.
In metal bearings; the hardness of the rolling body is usually higher than the inner and outer rings; this is about reducing the conflict wear; improving the service life and bearing capacity of the bearing is beneficial. Currently in plastic bearings; the rolling body is rarely plastic; the rigidity or hardness is not good. Maybe it is an important reason.
The problem of falling conflict wear is usually evaluated by conflicting wear characteristics of polymer data using collision coefficient, specific wear rate, critical PV value and noise.
In plastics, POM, PA66, UHMWPE, PTFE, PEEK and other materials generally have good wear resistance; however, they are used as conflict shipments; their conflict coefficient is still high; the specific wear rate is large; the critical PV value is also low; Will have sharp noise.
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Application of plastic in rolling bearings (4)
Source: China Bearing Network Time: 2018-01-14