At present, with the continuous development of microelectronics technology, pneumatic technology is also constantly innovating and has achieved unprecedented development. Also in the area of ​​pad printing and silk screen printing, pneumatic technology has gained absolute application status in order to improve production conditions and improve labor productivity and print quality.
As we all know, pneumatic technology is based on air as the working medium, so the clean conditions of compressed air and the primary conditions for the normal operation of pneumatic systems. However, at present, there are quite a few users in the country who do not have the quality of compressed air, and they just start to work when they buy a pair of air compressors to connect the trachea, without any effective drying. The service life of the equipment is often shortened and the accuracy is reduced. In some cases, the function of pneumatic components is lost even in a short time. Therefore, the author raises this issue here. Discussed in order to extend the life of the equipment and reduce maintenance costs.
First, the impact of compressed air on the equipment Because the air contains a lot of water, dust, and some solid particles (such as embroidered), so if it can effectively precipitate. It will directly enter the control element (such as solenoid valve, air control valve, regulator valve) or the inside of the cylinder and damage the inside of the element. Take the solenoid valve as an example; due to the solenoid valve. At present, most brands use O-ring seals (the other is a diaphragm seal). Solid particles enter the working chamber. In constant air exchange (usually 2000-5000 times), O-rings will constantly rub against solid particles. In this case, the first damage is the O-ring. Lead to air leakage directly, resulting in insufficiency of ventilation or no ventilation at all. By the same token, the air cylinder of the actuator also leaks, causing insufficient pressure and working abnormally. If the valve is a hole with a relatively small size (such as a mechanical valve, a regulating valve, etc.), there will be excessive accumulation of solid particles, resulting in failure of regulation or inability of compressed air to circulate. As a result, compressed air cannot be circulated. It can be seen that the impact of compressed air on pneumatic components and even the entire machinery and equipment is considerable. Therefore, effective methods must be taken to improve the quality of compressed air.
Second, the quality of compressed air obtained Because the compressed air is directly obtained by the air compressor, so choose a good air compressor is the key. At present, there are many types of compressors on the market, and several brands and several types can be selected when purchasing. Among them, multi-stage compressors are used more often, and multi-stage compressors are generally equipped with an intercooler. In order to make water vapor condensation in each compression station, compressed in the air. During this period, the intercooler can remove most of the water vapor in the air, and the air tank can also cool the compressed air. Therefore, the compressed air output from the air compression station is relatively clean.
Another work to be done is to pay attention to the main gas line and the inlet pipe, that is to say, attention should be paid to the leakage of the pipe system hose, the control valve and the joint, and the condensation water condensation. When installing the air pipe system, Instead of using traditional seamless tubes, choose new materials (plastic tubes). Because the steel pipe is easy to be embroidered, the pipe embroidering will enter the interior of the pneumatic component with the compressed air. Water separators should normally also be installed and they should be regularly discharged (ie the cooling water should be drained).
In fact, as long as some basic work is done well, high quality compressed air is very easy to get. There are also several methods, such as: freeze-drying, absorption drying, adsorption drying. If one of these methods is added, the compressed air and the clean, freeze-dried method will be obtained using a lyophilizing agent, and the absorption and adsorption drying methods will be obtained by a chemical desiccant. These are sold in the market, and the product manuals are printed in detail on the use of methods and effects. This will not be introduced one by one here.
Compressed air quality
December 31 18:08:04, 2023
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