Analysis of common problems of ultrasonic cleaner
Common problems and analysis of ultrasonic cleaner are as follows:
1. What is "cavitation"? "Cavitation" is a phenomenon in which millions of tiny bubbles (or cavities) quickly form and burst in a liquid. "Cavitation" is the result of the interaction of high and low pressure waves formed by high-frequency sound waves (ultrasound). In the low-pressure stage, the bubble becomes larger, while in the high-pressure stage, it is compressed and implodes.
2. How can I achieve the best ultrasonic cleaning effect? ​​There are many conditions that can determine the final cleaning effect, the most important of which is to choose the right cleaning solution, clean the right time at the right temperature, choose the right size and type of ultrasound washing machine.
3. Will ultrasonic cleaning damage my workpieces? Ultrasonic cleaning is safe for most workpieces. The energy generated by the implosion of thousands of bubbles per second is huge, but because the energy is concentrated in an extremely small area, the entire cleaning process is safe. The most careful consideration for safety should be the choice of cleaning fluid. The potential damage of the cleaning fluid to the surface of some workpieces may increase due to the use of ultrasound. Ultrasonic cleaning is not recommended for the following gemstones: opal, pearl, jade, tanzanite, malachite, emerald, lapis lazuli and coral.
4. What is "direct" and "indirect" cleaning? Direct cleaning usually means that the workpiece is cleaned in a cleaning tank filled with cleaning fluid. The workpiece is usually installed in a tray or tooling basket with holes. The limitation of direct cleaning is the need to select those cleaning fluids that will not damage the ultrasonic cleaning tank. Indirect cleaning is to place the workpiece to be cleaned in a beaker or a tray without holes. The beaker or tray is filled with a solution instead of being directly installed in the cleaning tank. When selecting indirect cleaning, make sure that the water level in the tank is maintained at the standard position.
5. Why do you need a special cleaning solution for cleaning? The purpose of using the cleaning solution is to break the connection between the dirt and the workpiece, but the use of water alone will not achieve the cleaning effect. The main purpose of ultrasonic cavitation is also the auxiliary cleaning fluid for cleaning. A cleaning solution contains various ingredients to achieve the best cleaning effect. For example, reducing the surface tension of the liquid can increase the cavitation strength, and an ultrasonic cleaning liquid may contain a wetting agent or a surfactant component.
6. What cleaning fluid should I use? The ultrasonic cleaning fluid that is often used is a mixture of various cleaning ingredients, wetting agents and other reactive ingredients. Choosing the right cleaning fluid is essential to effectively clean the workpiece and eliminate unwanted reactions. Branson can provide you with the best cleaning solution.
7. What cleaning solution should I not use? Do not use flammable or low flash point solutions. The energy released by cavitation is converted into heat energy and kinetic energy and generates high temperature in the solution, which is very dangerous for flammable liquids. Acidic cleaning fluids and bleaches should generally be avoided because they can damage stainless steel tanks or cause harm; but they can be used when they are used in indirect cleaning processes, such as using large-mouth beakers as indirect cleaning containers.
8. When should I change the cleaning fluid? When cleaning, you can see the obvious reduction of cleaning fluid and you should replace it; or when the cleaning fluid is obviously dirty or invalid, you should also replace the cleaning fluid.
9. Why do I have to keep the cleaning fluid within the height allowed by the liquid level indicator? The ultrasonic cleaning system is a "tuned" system. Improper liquid level will change the cleaning environment, thus affecting the system frequency, reducing cleaning efficiency and damaging the equipment . Maintaining the proper liquid level can keep the workpiece in the optimal liquid flow, and protect the heater and the vibration box from damage due to overheating.
10. What is the length of cleaning time? Changes in cleaning time depend on factors such as dirt, cleaning fluid, temperature, and cleanliness requirements. When the ultrasonic cleaning is started, almost simultaneously, you can see the obvious dirt removed. Adjusting the cleaning time is the easiest (and often misused) method to compensate for changes in the process. Although experienced operators can try to guarantee the time required for a new cleaning process, they usually need to be verified by selecting cleaning fluids and contaminated workpieces in actual applications.
11. What is the heating device used for? The huge energy generated by cavitation will generate heat. The main purpose of the heating device is to maintain the temperature in the cleaning liquid during the cleaning process.
12. What is the best cleaning temperature? Heating can usually provide the speed of cleaning. At the same time, most of the chemical components in the cleaning solution will achieve the best cleaning effect at a certain temperature. The best way to find the best temperature is to experiment. Generally, the optimal cleaning temperature is between 50 ° C and 65 ° C.
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