As we know, in the production and life, need to clean a lot of things, also takes a lot of cleaning and the kinds of links, manual cleaning methods have been unable to meet demand and the common even steam cleaning and high pressure water jet cleaning cannot satisfy the demand for high cleanliness, so this is also the ultrasonic cleaning technology has been increasingly widely used in all walks of life. In the field of industrial cleaning, especially in the precision and cleanliness requirements of the cleaning process, ultrasonic cleaning to meet the automotive manufacturing, aviation, instrumentation, hardware machinery, electronics, vacuum coating, optical equipment, medical equipment and other precision and personalized cleaning requirements. This internationally recognized industrial cleaning method with the highest cleaning efficiency and the best cleaning effect, the cleaning efficiency reaches more than 98%, and is favored by all walks of life.
Ultrasonic cleaning technology high cleaning quality, fast cleaning speed, short cleaning time, simple operation. High cleanliness, for all kinds of stains removal cleaning effect more thorough. The groove, the deep hole, the narrow slit and the concealed place of the instrument, the small parts inside can also be cleaned; At the same time in the removal of oil, rust and removal of oxides and other aspects also have a good effect. Can also be used in combination with automatic cleaning sterilizer, easy to achieve mechanization and automation.
Ultrasonic wave is a mechanical wave, a kind of sound wave. The frequency range of sound wave that can be heard by human ear is about 16 ~ 20,000 hz, so the sound wave with frequency higher than 20kHz is called ultrasonic wave. When higher than that of ultrasound (28 ~ 40 KHZ) after high frequency vibration to the cleaning medium, ultrasonic wave with high frequency of stress and tension interactive mapping mode to the water transmission, when the tension, "vacuum" nuclear group of bubble water, when the pressure, "vacuum" nuclear group of strong shock produced by bubble due to breakdown the dirt on the surface of the object hit down, The surface is stripped of dirt to achieve precision cleaning, a process known as "cavitation effect".
Ultrasonic propagation principle: cavitation is divided into four stages.
One stage: as the pressure decreases, a large number of bubbles are produced;
The second stage: the bubble continues to increase, according to the different frequency bubble increases to different sizes;
Three stages: the pressure increases and the bubble is compressed;
Four stages: the temperature rises until the bubble bursts, producing the micro-brush effect.
Direct inflow: the phenomenon that ultrasonic wave flows along the direction of sound propagation in liquid is called direct inflow. When the acoustic intensity is 0.5W/cm2, the naked eye can see the direct inflow, which is perpendicular to the vibration surface, and the flow rate is about 10cm/s. Through the direct flow to make the cleaning surface of the micro oil dirt is stirred, dirt surface cleaning fluid also generates convection, dissolved dirt dissolved liquid mixed with new liquid, so that the dissolution speed is accelerated, the handling of dirt plays a great role. Photo source: Kunshan Ultrasound Instrument Co., LTD
Ultrasonic wave in the liquid transmission, so that the liquid and cleaning tank in ultrasonic frequency vibration, liquid and cleaning tank vibration when their own natural frequency, the vibration frequency is the frequency of sound wave, so people hear the buzz. When the ultrasonic system reaches 20-30khz, it is suitable for cleaning heavy dirt. It is suitable for removing hard dirt, crusts and carbon deposits. It is used for cleaning mechanical parts, injection moulds and various parts that are heavily polluted or require high power treatment. When reaching 30-60khz, it can solve some minor pollution cleaning problems, such as some medical, surgical, pharmaceutical, watch jewelry and other parts that need gentle treatment.
High-frequency ultrasonic cleaning is also suitable for the fine cleaning of computer and microelectronics components, such as disk, drive, read and write head, liquid crystal glass and flat display, micro components and polishing metal parts, etc. These cleaning objects must not be corroded by cavitation during the cleaning process. Megahertz ultrasonic cleaning is suitable for integrated circuit chips, silicon chips and film cleaning, can remove micron, sub-micron level of dirt without any damage to the cleaning parts, without cavitation, because of the cleaning direction is strong, the cleaning parts are generally placed in the direction parallel to the sound beam.
Using a 20-30khz ultrasonic system, a smaller number of larger bubbles are produced, and each large bubble is compressed to produce a larger burst
When using 30-60khz ultrasonic systems, a large number of small bubbles are generated during cleaning, and the blasting intensity is low. It is a gentle cleaning process.