Many people are familiar with the pvd coating machine, but when asked about the basic principles of coating and coating and the environmental requirements for coating, they can't say anything about it. For an engineer, basic coating principles and coating requirements of pvd coating machine are the basic knowledge that must be mastered. The following is a summary of the requirements of vacuum coating on the environment and the basic principles of coating.

Anyone who knows a little about vacuum coating knows it. It is very important to clean the surface of the substrate (substrate) in the vacuum coating process. Before the substrate enters the coating room, it shall be carefully cleaned before plating to achieve the purpose of degreasing, decontamination and dehydration of the workpiece. The substrate surface pollution comes from various dust, lubricating oil, engine oil, polishing paste, grease, sweat and other substances adhered to the parts during processing, transmission and packaging; The oxide film formed on the part surface in humid air; Gas absorbed and adsorbed on the part surface. Basically, vacuum coating manufacturers can remove these contaminants by degreasing or chemical cleaning.
The cleaned surface shall not be stored in the atmospheric environment, but shall be stored in closed containers or cleaning cabinets to reduce dust contamination. The adsorption of hydrocarbon vapor can be minimized by storing the glass substrate in a freshly oxidized aluminum container. Because these containers preferentially adsorb hydrocarbons. The highly unstable and sensitive surface to water vapor shall be generally stored in a vacuum drying oven.
The basic requirements of the coating process for the environment are to remove the dust in the coating room, set up a clean workshop and keep the room highly clean. In areas with high air humidity, the substrate and all parts in the vacuum chamber shall be carefully cleaned before plating, and baking and degassing shall also be carried out. To prevent oil from entering the vacuum chamber, pay attention to the return of oil from the oil diffusion pump, and take oil retaining measures for the diffusion pump with high heating power.
What is the basic principle of coating and coating of pvd coating machine?
The raw materials of the coating are resin, polymer, Teflon, silicone, acrylic acid, silicate, etc. The auxiliary materials, formula and measurement are different. For example, if the added emulsifier is mixed in different amounts, the emulsified state will be different. Water, emulsion and paste can be realized. After emulsification and demulsification, some of these substances permeate or form a film. The coating has good penetration function (depending on the particle size of the raw material), better surface smoothness, and is applicable to European and American car paint with more "pores", roughness, repainted paint, and hard paint that needs to increase brightness.
The coating products are added with film forming aids and curing agents, and the vacuum coating manufacturers make them form films instantly, and their properties have changed accordingly. For example, the hardness is higher than the sealing glaze, which is more applicable to the paint surface that needs to improve the hardness (such as Japanese and Korean car series). In terms of the function of filtering and reflecting ultraviolet rays, the coating of Granite is better than the coating. Because it does not need to add components such as film forming aids and curing agents, the more pure quartz glass molecular covering layer+fusion layer has stronger dual filtering and UV reflection capabilities. It is worth worrying that the use of non environmental film forming additives in low-quality coating products may even cause secondary chemical damage to the paint.
The main performance of the protective layer is to prevent the oxidation and fading of the original car paint, block the ultraviolet ray, and minimize the transmission damage of the ultraviolet ray. Increase the brightness of the paint surface: The crystal clear glass molecules make the car paint shine. Improve the hardness of paint surface: improve the wear resistance and scratch resistance. Prevent chemical damage and prolong the service life of the paint: such as alkaline car washing, acid rain and salt spray, insect sap gum, high temperature and cold. Increase the smoothness of the watch: it feels silky, reduces static electricity, dust adhesion and wind resistance coefficient, and makes daily maintenance more convenient.