All kinds of articles in daily life can not be separated from a thin coating on the surface. Some are coated with various colors, and some are to change the surface functionality. As long as you watch carefully, many products that have been plated with a layer of surface film can occur, such as tableware, hardware, parts, cameras, mobile phone shells, etc. The following is a brief introduction to the principle of vacuum coating machine and its environmental requirements. I hope it can help you:

The vacuum coating machine is to bombard the target material with argon ions formed by electron bombarding argon through the orthogonal magnetic field under the vacuum state, and the target ions are deposited on the surface of the workpiece to form a film. In this way, the lamp coating machine manufacturer should consider the vacuum state, magnetic field and argon related to the uniformity of film thickness. The vacuum state needs to be controlled by the air extraction system. Each air extraction port should be started at the same time with consistent strength, so that the uniformity of air extraction can be controlled. If the air extraction is uneven, the pressure in the vacuum chamber cannot be uniform, and the pressure has a certain impact on the movement of ions.
(1) Environmental requirements of vacuum coating.
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.
(2) Basic principles of coating and coating
A. Raw materials and basic principles:
The raw materials are all resins, polymers, Teflon, silicone, acrylic acid, silicate, etc. The excipients, formulas and measurements 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.
B. Their characteristics and differences:
Plating: It has good penetration function (depending on the particle size of raw materials), better surface smoothness, and is applicable to European and American car paint with many "pores", roughness, repainted paint, and hard paint that needs to increase brightness.
Coating: the coating products are added with film forming aids and curing agents, and the vacuum coating manufacturers make them form films instantly, and the properties have changed accordingly.
There are many types of vacuum coating equipment on the market. Some vacuum coating machine are named according to the technology used, and some vacuum coating machine is named according to the field of application. The application field, name and model are different, but the basic principles of coating and coating are similar.