Vacuum coating products have spread to all aspects of life, and the requirements of pvd coating machines are getting higher and higher. A long time ago, the coating of items was only for durability and anti-aging. With the passage of time, coating is not only durable, but also in appearance. beautiful. Therefore, now the film layers are full of patterns, with different colors, and even in different industries, the models and functions of the coating equipment are also different, and the technical requirements of natural coating engineers are higher. Then during the operation of the coating equipment, the coating engineer will always encounter the problem of degassing the workpiece. The following is a vacuum editor to explain the operation method of the pvd coating machine and how to remove the gas from the workpiece.

For the operation of pvd coating machine, when you first start contacting, it is best to remember the steps first, and then practice slowly. When we are preparing to operate the coating equipment, we must first check whether the operation control switches of the pvd coating machine are in the "off" position. , then turn on the main power switch, power on the pvd coating machine, then pull out the low-pressure valve, open the inflation valve, and when the sound of airflow is not heard, start the bell valve and the bell rises. At this time, install the fixed tungsten spiral heater. Fix the PVDF film and aluminum cover on the rotating disc. Thread the aluminum wire into the helical heater. Clean all parts of the bell jar to ensure that there are no impurities and dirt, then drop the bell jar, start the pvd coating machine vacuum pump, and then turn on the power supply of the composite vacuum gauge (composite vacuum gauge model: Fzh-1A). When the pointer in the low vacuum gauge "2" moves clockwise to 6.7Pa again, the low pressure valve is pushed in. Continue to open the cooling water, start the diffusion pump, and heat for 40min. When the low-pressure valve is pulled out, the vertical single-door coating machine repeats the action procedure ⑦: the lower left knob "1" is turned to point to the measurement position of section 2.
       How to remove gas from the workpiece of pvd coating machine? The following is an analysis for everyone. Generally, many workpieces have a lot of air and moisture inside themselves. These things will be discharged into the vacuum chamber when the equipment is heated, which cannot achieve the expected vacuum effect. What's more, some gases With toxic components, it directly damages the internal mechanical structure of the vacuum chamber, causing the equipment to fail to operate normally. In addition, during the coating process, due to the heating and expansion of the gas in the workpiece, it is easy to crack the coated film layer. Of course, the probability of this situation depends on the physical properties of the workpiece itself, such as plastics that are easy to expand, the probability is relatively high. For hard materials such as metal, the probability is relatively low, but it cannot be ignored, so the degassing of the workpiece is very necessary.
       Generally, the workpiece degassing method used by people is baking, which relies on heating to effectively discharge the gas and moisture in the workpiece. Before coating, the workpiece is heated at the same time as the gas is pumped. When the moisture and gas in the workpiece are released due to heating, Along with the gas in the vacuum chamber, it is pumped out by the vacuum pump. Different degassing measures are taken for different workpieces to effectively control the emission of gas and moisture inside the workpiece, and improve the stability and uniformity of the coating.
     The above are the operation steps of the real open pvd coating machine and the method of degassing the workpiece. I hope it can help you. If you want to know more about this, you should read more related content and articles, so as to improve faster.