Ultrasonic cleaning is a form of physical cleaning. The cleaning solution is placed in a tank and ultrasonic waves are applied within it. Since ultrasonic waves, like sound waves, are a type of vibration wave with varying densities, the pressure of the medium alternates during their propagation. In the negative pressure zone, tearing forces are generated in the liquid and vacuum bubbles are formed. When the sound pressure reaches a certain value, the bubbles grow rapidly. In the positive pressure area, the bubbles burst and close due to the pressure. At this moment, the liquids collide with each other, generating powerful shock waves. Although the displacement and velocity are very small, the acceleration is extremely large, and the local pressure can reach several thousand atmospheres. This is what is called the cavitation effect. I. Five Factors Affecting Cleaning Effect: 1. Frequency: Generally, the lower the frequency, the more obvious the cavitation effect, but the noise is relatively higher. It is suitable for objects with relatively flat surfaces. The higher the frequency, the worse the cavitation effect, but the noise is relatively low. It is suitable for objects with many micro-holes and blind holes, as well as electronic crystals, etc. 2. Temperature: Generally 30℃. The best cleaning effect is achieved at a medium temperature of 50℃. 3. Sound intensity: Depending on the frequency, the sound intensity is generally selected within 1 -; About 2w/cm ². 4. Cleaning solution: Generally speaking, the lower the viscosity of the cleaning solution and the higher the air content, the better the cleaning effect. 5. It is related to the depth of the cleaning solution and the position of the object to be cleaned. Ii. Applications of Ultrasonic Cleaning in Various Fields Due to the unparalleled superiority of ultrasonic cleaning over other physical or chemical cleaning methods, Therefore, it is widely applied in many fields such as the service industry, electronics industry, pharmaceutical industry, laboratories, machinery industry, hard alloy industry, and chemical industry. The following is a brief introduction to some individual industries. (1) Ultrasonic cleaning of Metals It is well known that after metal bars are extruded into wires, there is often a layer of carbonized film and oil on the outside of the metal wires. It is very difficult to remove the dirt by acid cleaning or other cleaning methods (especially for the entire coil of wires). The ultrasonic wire washing machine is a continuous wire feeding and high-efficiency cleaning equipment designed according to actual production needs. The rough cleaning part is composed of a cleaning liquid storage tank, a transducer, a circulating pump, a filter and a supporting pipeline system. After the metal wire is roughly and finely cleaned by ultrasonic waves, it is dried by blowing, thus completing the entire cleaning process. The entire set of equipment is integrated and controlled, featuring simplicity, convenience and excellent performance. It is widely used for tantalum wire, tungsten wire, molybdenum wire, niobium wire, copper wire (before insulating varnish coating) and other metal wires. (2) Application of Ultrasonic Cleaning Technology in Phosphating Treatment < p>

The pretreatment process before product spraying is very important. Generally, traditional processes use acid solutions to treat workpieces, which causes serious environmental pollution, has a poor working environment, and at the same time, The biggest drawback is that the residual acid left after acid washing and rust removal of complex-structured parts is very difficult to rinse clean. After the workpiece was sprayed, rust appeared along the crevices in a short time, damaging the surface of the coating and seriously affecting the appearance and internal quality of the product. After ultrasonic cleaning technology is applied to the pretreatment before coating, not only can the dirt on the surface and in the crevices of the object be quickly peeled off, but also the spray coating of the coated parts will be firm and will not rust again. (3) Application in the service industry. In daily production, ultrasonic waves can be used to clean glasses and jewelry, which is fast and non-damaging. Large hotels and restaurants use it to clean tableware, which not only has a good cleaning effect but also has the function of killing viruses. (4) Application of Ultrasonic Waves in Micro-powder Industry It is well known that to obtain particles of different sizes, the crushed materials are ground in a ball mill and then sieved layer by layer through screens of different specifications. After long-term use, the sieve holes (such as diamond sieves) will be clogged. Scrubbing with other methods will damage the sieve and the effect is not ideal. After numerous tests by many manufacturers, ultrasonic cleaning not only does not damage the sieve but also completely recovers the clogged particles on the sieve. (5) Ultrasonic cleaning of Filter Elements We know that regardless of the material or purpose of the filter, after being used for a period of time, its permeability will decrease due to impurities and it will be scrapped. Ordinary filter elements are relatively inexpensive and still acceptable. However, for the chemical fiber industry, an imported filter element costs nearly ten thousand yuan, and it would be a pity to discard it. The ultrasonic filter element cleaning machine we have developed in collaboration with other research institutions adopts a focused ultrasonic cleaning machine, which can concentrate more than 1KW of energy within 200 ° C. On a 20mm ² radiation surface, the ultrasonic intensity is high, which can quickly remove blockages. Meanwhile, the equipment adopts a reverse filtration device. As long as you provide the wave core, we can offer you a complete set of cleaning equipment. The time it takes for this device to clean one filter element is 10 to 15 minutes. It is applicable to PP cotton filter elements, activated carbon filter elements, hollow fiber filter elements and ceramic membrane filter elements. (6) Application of Ultrasonic Waves in the Pharmaceutical Industry Ultrasonic cleaning technology has been widely used by numerous pharmaceutical enterprises. Especially for the cleaning of vials, oral liquid bottles, ampoules, large infusion bottles, as well as butyl rubber stoppers and natural rubber stoppers, it has been approved. For the cleaning of bottles, ultrasonic cleaning technology is used to replace the original brush machine. It is achieved through processes such as flipping and filling water, ultrasonic cleaning, internal and external rinsing, air drying, and flipping. In conclusion, the application and cleaning effect of ultrasonic cleaning machines are quite obvious. Due to the different quotations of ultrasonic cleaning machines in the current market, the cleaning effects are also different. This is mainly caused by the production process and principle of the machines, etc. Therefore, it is suggested here that users should not only seek low prices when purchasing, but more importantly, pay attention to whether the cleaning effect can meet their own needs.