Who is to blame for the vacuum-type plasma cleaner that cannot be pumped down

• Categories:Technical Support
• Author:Plasma cleaning machine-CRF plasma plasma equipment-plasma surface treatment machine manufacturer-chengfeng intelligent manufacturing
• Origin:
• Time of issue:2021-09-14
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(Summary description)Who is to blame for the vacuum-type plasma cleaner that cannot be pumped down: During the use of the vacuum plasma cleaner, there may be such a phenomenon: the equipment is operating normally, and after replacing the new product, the vacuum increases and cannot be pumped down. Why? Have you discovered the mystery? I will share with you now for reference only. To determine whether the vacuum plasma cleaner vacuum chamber can be pumped backward, such as 30Pa, within 50S when the vacuum chamber is empty, and when processing other products, the equipment does not give an alarm, indicating that there is no problem with the pumping capacity of the vacuum pump. And there is no air leakage in the entire vacuum generating system. Judging from the operating conditions of the vacuum plasma cleaner equipment, the operation of the equipment is stable. If the background vacuum cannot be pumped to the alarm within a set time, such as 200S, it is mainly related to the material of the product being processed. We usually call it "material leakage". If the substance contains volatile substances, such as moisture, solvents, plasticizers, etc., and the vacuum escapes, the vacuum will decrease, which is called outgassing. Material leakage is the leakage rate of the material. Each material is different, and it is mainly determined by the density of the substance. The higher the density, the higher the leakage rate of the substance, and the lower the leakage rate of the substance; the higher the density of the substance molecule. The smaller the gap between, the smaller the density, the larger the gap between the material molecules, and the gaps between the molecules contain gas. In a vacuum state, the smaller the molecular gap inside the substance, the gas slowly flows from the inside of the substance to the outside. Exhaust until the pressure balances, this process is relatively slow, so after the vacuum plasma cleaner is evacuated to a certain degree, the vacuum degree is reduced. The speed of the vacuum degree reduction is related to the quantity of discharge, and the discharge speed also has Relationship, the more the number of times of feeding, the slower the speed of feeding will decrease. If there are volatile substances in the cavity, it can also cause the vacuum to be slow. Such as permeable material-sponge permeable material-copper wire skeleton. Moreover, the vacuum plasma cleaning machine is limited by the overall structure, and generally cannot be modified. The ideological analysis can be solved by increasing the pumping capacity. However, if the product is reduced after the pumping is increased, the vacuum will be reduced, and the power supply will be reduced. The load will increase, and it will be unstable, it is easy to burn out the power supply and matching device, causing unnecessary losses. Generally, the method of extending the vacuum time (changing the system parameters) and reducing the number of venting is used to ensure the normal operation of the equipment; other similar products can also be used, such as cleaning with the equipment. Therefore, before purchasing a vacuum plasma cleaner, you should conduct tests based on samples, and fully consider the impact of material infiltration on the vacuum of the equipment, otherwise it will be difficult to meet the processing requirements of the required products. If the ordered equipment cannot be upgraded or modified, it can only be solved by reducing the amplifier and increasing the pumping time. The explanation of the above-mentioned material leakage affecting the vacuuming of the vacuum plasma cleaner is helpful to you, what other experiences and experiences do you have, please leave a message to communicate and share with us! If you are interested in plasma cleaners or want to know more details, please click Chengfeng Zhizao online customer service consultation, Chengfeng Zhizao is waiting for your call!