1, When the vacuum components, such as valves, traps, dust collectors and vacuum pumps, are connected to each other, they should try to make the pumping pipeline short, the pipeline flow guide is large, and the diameter of the conduit is generally not smaller than the diameter of the pump port, which is an important principle of the system design. But at the same time to consider the installation and maintenance conveniently. Sometimes, in order to prevent vibration and reduce noise, the mechanical pump is allowed to be set in the pump room near the vacuum chamber.
2, mechanical pumps (including Roots pumps) have vibration, to prevent the vibration of the whole system, usually reduce vibration with a hose. The hose has two kinds, metal and non-metal, regardless of the kind of hose, we need to ensure that the atmospheric pressure is not deflated.
3, After the vacuum system is built, it should be easy to measure and leak detection. The production practice tells us that the vacuum system is often easy to leak and affect the production in the working process. In order to find the leakage hole quickly, it is necessary to carry out sectional leak testing, so there should be at least one measuring point in each interval closed by valve for measuring and leak testing.
4, The valves and pipelines configured in the vacuum system should make the system pumping time short, easy to use, safe and reliable. Generally, on the system with a vapor flow pump as the main pump (diffusion pump or oil booster pump), and a mechanical pump as the pre-stage pump, in addition a pre-vacuum pipeline (pipelines of steam flow pump in series with mechanical pump) there should be a pre-stage pipeline (pipeline of vacuum chamber to mechanical pump). Next, there is a high vacuum valve (also called main valve) between vacuum chamber and main pump, and a pre-stage pipeline valve (also called low vacuum valve) on the pre-stage pipeline; there is a pre-vacuum pipeline valve (called low vacuum valve) on the pre-vacuum pipeline. The high vacuum valve on the main pump usually cannot be opened under the valve cover in vacuum state and on the valve cover in atmospheric pressure state, which should be ensured by electrical interlock for safety. The pre-stage pipeline valve and pre-vacuum pipeline valve should be considered that the valve itself can be opened under atmospheric pressure. For vacuum system with vapor flow pump as main pump, the main valve should be covered to the main pump, the pre-stage piping valve should also be covered to the main pump and the pre-vacuum pipe valve should be covered to the vacuum chamber. On the inlet pipe of mechanical pump, there should be a deflation valve. When the mechanical pump stops working, this valve can be opened immediately to make the mechanical pump entrance to the atmosphere and prevent the mechanical pump oil from flowing back to the pipeline, so the valve should be electrically interlocked with the mechanical pump. The vacuum chamber should also be set up a deflation valve, for loading and taking material. The position of the valve should take into account the large impulse of the gas when deflating, to prevent the weak components in the vacuum chamber from being damaged by the excessive impulse. The size of the deflation valve is related to the volume of the vacuum chamber, and it should be considered that the deflation time should not be too long and affect the work.
5, The design of vacuum system should ensure stable and reliable exhaust, easy installation, disassembly and maintenance, convenient operation, and interchangeability of the connection between components. In order to achieve stable exhaust gas, the main pump should be stable, the valves should be flexible and reliable, the connectors of each component in the system should not leak, the vacuum chamber should have good sealing performance, and the connections of vacuum components should be of standard size to ensure interchangeability. In principle, in the design of vacuum system, each closed pipe size should have an adjustable size. In the past, this adjustable size was solved by using hose, but nowadays, most of the systems are designed without hoses. Instead, the installation errors are solved by improving the precision of vacuum component processing size and using the sealing rubber ring on the connecting flange, which can improve the strength and rigidity of the system, reduce the bracket used on the system and make it more beautiful.
6, New technology should be adopted in the design of vacuum system to achieve automatic control and interlock protection. With the development of vacuum technology, it is required to be able to operate automatically in the whole pumping process, such as using vacuum relay to control the Roots pump to start working at 1333Pa pressure. The water pressure relay is used to control the water pressure of the vapor flow pump at a certain pressure, and when the water pressure is insufficient or cut off, it can immediately cut off the power and issue an alarm. Prevent the pump from being burned out. For the complex vacuum system and process, parameters of strict requirements of the equipment should be controlled by microcomputer program, more safe and reliable.
7, The design of vacuum system is required to save energy, reduce cost, easy to use and reliable. Doing this has great economic significance, which can make the designed vacuum equipment have wide market sales.
Magnetron coating equipment adopts medium frequency magnetron sputtering and multi-arc ion combination technology, which is suitable for plastic, glass, ceramic, hardware and other products, such as glasses, watches, cell phone accessories, electronic products, crystal glass, etc. The adhesion, repeatability, density and uniformity of the film layer are good, and it has the characteristics of large output and high product yield.
Mainly used in cell phones with metal keys, card holders, center frame coated gold, rose gold, black, gunmetal black and blue.
Post time: Nov-07-2022