Detailed Structure of Vacuum Coating Machine


High-vacuumcoating machine, coating machine is currently a wide range of equipment for producing vacuum conditions. Its related components and components: mechanical pump, booster pump, oil diffusion pump, condensate pump, vacuum measurement system.
1. Vacuum main body-vacuum chamber
Depending on the requirements of the processed products, the size of the vacuum chamber is different. Currently, the diameters of the vacuum chamber are 1.3M, 0.9M, 1.5M, 1.8M, etc. The chamber is made of stainless steel, which requires no rust, solidity, etc., vacuum Each part of the cavity is provided with a connecting valve for connecting each pump.
2. Auxiliary air extraction system
This exhaust system is composed of "diffusion pump + mechanical pump + roots pump + cryogenic cold trap + polycold"
The exhaust process is: the mechanical pump first pumps the vacuum chamber to a low vacuum state less than 2.0*10-2PA, which provides a prerequisite for the subsequent vacuuming of the diffusion pump, and then when the diffusion pump pumps the vacuum chamber, the mechanical pump cooperates with oil diffusion The pumps are connected in series to complete the pumping action in this way.
The exhaust system is an important part of the vacuum system of the coating machine, which mainly consists of three parts: mechanical pump, booster pump (mainly introduces Roots pump), and oil diffusion pump.
Mechanical pump: also called backing pump. Mechanical pump is a kind of low vacuum pump that is widely used. It uses oil to maintain the sealing effect and relies on mechanical methods to continuously change the volume of the suction cavity in the pump to make the pumped container The volume of the gas continuously expands to obtain a vacuum.
There are many types of mechanical pumps. Commonly used are slide valve type (this is mainly used in large equipment), piston reciprocating type, fixed vane type and rotary vane type (this is currently widely used, this article mainly introduces) four types.

评论

发表评论

此博客中的热门博文

Common Faults and Solutions of Nichwell Glove Box (2)

图片
1. Turn off the cycle and analyzer at the same time Causes: ① the pressure in the tank is too high in an instant, exceeding + 12mbar, the system will automatically protect; ② the voltage is unstable, causing system protection. Methods: ① check whether the pressure setting is correct, whether the pressure sensor is abnormal, whether the box vacuum valve or air supply valve is damaged, and then open the analyzer and cycle after the pressure returns to normal. ② Check whether the vacuum pump is broken and cannot operate. 2. Main antechamber and min antechamber can't replenish air Causes: ① the air hole leading to the large and small bins in the glove box may be blocked by plastic film; ② whether the solenoid valve is not opened. Methods: ① determine the position of air hole and dredge the pipeline according to the pipeline direction; ② check the pipeline and solenoid valve. 3. Main antechamber and min antechamber are unable to pump air Causes: ① the suctio
阅读全文

Application of Leybold Vacuum Pump in Refrigeration Equipment

The structure and working principle of Leybold vacuum pump The commonly used vacuum pump is the Leybold vacuum pump, which relies on the rotary vane to periodically change the working volume of the pump chamber (cylinder) to pump air. The structure of the Leybold vacuum pump is similar to that of a reciprocating piston compressor. When working, the suction pipe is connected to the vacuum container, and the exhaust pipe is directly connected to the atmosphere. Leybold vacuum pumps have a large pumping capacity, with a pumping rate ranging from 45 to 20000 cubic meters per hour. The ultimate pressure of a single-stage pump is about 103 Pa, and a two-stage pump can reach 1 Pa. Leybold vacuum pumps can be used for vacuum distillation, vacuum concentration, vacuum crystallization, vacuum filtration, vacuum drying and concrete vacuum operations. If a condenser is installed at the suction port of the pump, the gas containing steam can be removed; if a filter is installed, the dust-containin
阅读全文

Dazzling under the Light, use the Lighting to Create a Perfect Family Atmosphere

图片
The lighting design of a family is indispensable. Lighting is the soul of space. Different types of lighting can also create different light and shadow effects. In the design of home decoration, there are many points to pay attention to in the design of home lighting. The living room should be very rich and layered, the restaurant should be romantic and stylish, the study and kitchen should be bright and practical, the bedroom should be warm and comfortable, and the bathroom must be round and refreshing. Classification of Home Lighting : Indoor home lamps can be divided into chandeliers, ceiling lamps, wall lamps, spot lamps, table lamps, floor lamps according to the installation method. Chandeliers: Today's chandelier can basically be adjusted in height, which can be limited to space market needs with different heights. But it is best not to fall too short, so as not to block your sight or feel really glare. Chandeliers are commonly used in homes as living rooms, be
阅读全文