pvd coating machines are becoming more and more common, and people's understanding of it has also made great progress, but as a technician in the company, the understanding and operation of pvd coating machines must be quite proficient. Let me explain the uniformity of the pvd coating machine, then what factors will affect the uniformity of the vacuum coating? For experienced technicians, the principle of the coating machine is actually very simple. It is to bombard the target with argon ions formed by electron bombardment of argon gas through an orthogonal magnetic field in a vacuum state, and the target ions are deposited on the surface of the workpiece to form a film. In this way, the manufacturer of the lamp coating machine should consider the three aspects related to the uniformity of the film thickness: the vacuum state, the magnetic field, and the argon gas. The vacuum state needs to be controlled by the pumping system. Each pumping port must be activated at the same time with the same force, so that the uniformity of the pumping can be controlled. If the pumping is not uniform, the pressure in the vacuum chamber will not be uniform. Pressure has a certain effect on the motion of ions. In addition, the pumping time should also be controlled. If it is too short, the vacuum will be insufficient, but if it is too long, it will waste resources.

So what are the environmental requirements of the pvd coating machine?
      First of all, the surface cleaning treatment of the pvd coating machine is necessary, and the surface of the substrate (substrate) in the vacuum coating process needs to be cleaned. Before the substrate enters the coating chamber, it should be carefully cleaned before plating to achieve the purpose of degreasing, decontamination and dehydration of the workpiece. Substrate surface contamination comes from various dust, lubricating oil, engine oil, polishing paste, grease, perspiration, etc. adhered to the parts during processing, transmission and packaging; the oxide film generated on the surface of the part in humid air; the surface of the part absorbs and adsorbed gas. These contaminants can basically be removed by degreasing or chemical cleaning methods.
 
      Clearing the dust in the coating room, setting up a clean workshop, and keeping the room highly clean are the basic requirements of the coating process for the environment. In areas with high air humidity, in addition to carefully cleaning the substrate and various components in the vacuum chamber before plating, baking and degassing are also required. To prevent oil from being brought into the vacuum chamber, pay attention to the oil diffusion pump returning oil, and oil blocking measures must be taken for the diffusion pump with high heating power.
 
What is the basic principle of coating and coating
       First of all, let's introduce the coating separately: good penetration function (depending on the particle size of the raw material), better surface smoothness, more "capillary pores, roughness, heavy spray paint, and hard paint surface need to increase the brightness of the paint surface." European and American car paint surfaces are more suitable. Coating products are added with film-forming aids and curing agents, and pvd coating manufacturers make them form films instantly, and the properties have changed accordingly. For example, the hardness is higher than that of sealing glazes, and it is necessary to improve the paint surface. Hard paint surfaces (such as Japanese and Korean cars) are more suitable.
 
       Special note: In terms of the function of filtering and reflecting ultraviolet rays, the grid-resistant coating is better than the coating. Because it does not need to add film-forming aids and curing agents and other ingredients, a purer quartz glass molecular covering layer + fusion layer, it has stronger dual filtering and UV reflection capabilities. What is worth worrying about is that inferior coating products use non-environmentally friendly film-forming additives, which may even cause secondary chemical damage to the paint surface.
Then the main performance of the protective layer: First, prevent the oxidation and fading of the original car paint: block ultraviolet rays and minimize the transmission damage of ultraviolet rays. Secondly, increase the brightness of the paint surface: the crystal clear glass molecules make the car paint surface bright and dazzling. Improve paint surface hardness: Improve anti-wear and anti-scratch performance. Prevent chemical damage and prolong paint life: such as alkaline car wash, acid rain salt spray, insect sap gum, high temperature and cold damage to car paint. Increase the smoothness of the car watch: it feels silky and smooth, reduces static electricity, dust adhesion and wind resistance coefficient, making daily maintenance more convenient.
 
       The above are some of the problems that the pvd coating machine will encounter on a daily basis. After reading it, you should have a general understanding of the daily maintenance of the machine. When you really come into contact with the pvd coating machine and encounter these problems, you may be concerned about these daily problems later. The solution will be more solid.