Ultrasonic Cleaner in Kolkata India | East India Chemical

Ultrasonic and megasonic cleaners are used in varied applications to clean substrate surfaces. In a typical assembly, a cleaning system includes a tank that holds a fluid medium such as an aqueous solution, which generally includes additives such as surfactants and detergents that enhance the cleaning performance of the system. Lately, more distinctive means of delivery have been utilized, particularly for single wafer applications. In one example, megasonics is diverted into a stream of fluid that impacts the substrate surface. In another, megasonics imparts directly on a film of fluid no more than a few millimeters thick on the wafer surface. Ultrasonics can also be delivered via an ultrasonic horn, which is a popular methodnot for cleaning but for cell disruption, emulsification, and homogenizing of biological matter. In both cleaning and cell disruption applications, it is the phenomenon of cavitation that drives the actions.

Ultrasonic cleaning is a process that uses ultrasound (usually from 20–400 kHz) to agitate a fluid. The ultrasound can be used with just water, but use of a solvent appropriate for the item to be cleaned and the type of soiling present enhances the effect. Cleaning normally lasts between three and six minutes, but can also exceed 20 minutes, depending on the object to be cleaned.

Ultrasonic cleaners are used to clean many different types of objects, including jewelry, lenses and other optical parts, watches, dental and surgical instruments, tools, coins, fountain pens, golf clubs, fishing reels, window blinds, firearms, car fuel injectors, musical instruments, gramophone records, industrial parts and electronic equipment. They are used in many jewelry workshops, watchmakers' establishments, and electronic repair workshops.

Water-based solutions are more limited in their ability to remove contaminants by chemical action alone than solvent solutions; e.g. for delicate parts covered with thick grease. The effort required to design an effective aqueous-cleaning system for a particular purpose is much greater than for a solvent system.

Some machines (which are not unduly large) are integrated with vapour degreasing machines using hydrocarbon cleaning fluids: Three tanks are used in a cascade. The lower tank containing dirty fluid is heated causing the fluid to evaporate. At the top of the machine there is a refrigeration coil. Fluid condenses on the coil and falls into the upper tank. The upper tank eventually overflows and clean fluid runs into the work tank where the cleaning takes place. Purchase price is higher than simpler machines, but such machines are economical in the long run. The same fluid can be reused many times, minimising wastage and pollution.

Uses

Most hard, non-absorbent materials (metals, plastics, etc.) not chemically attacked by the cleaning fluid are suitable for ultrasonic cleaning. Ideal materials for ultrasonic cleaning include small electronic parts, cables, rods, wires and detailed items, as well as objects made of glass, plastic, aluminium or ceramic.

Ultrasonic cleaning does not sterilize the objects being cleaned, because spores and viruses will remain on the objects after cleaning. In medical applications, sterilization normally follows ultrasonic cleaning as a separate step.

Industrial ultrasonic cleaners are used in the automotive, sporting, printing, marine, medical, pharmaceutical, electroplating, disk drive components, engineering and weapons industries.

Ultrasonic cleaning is used to remove contamination from industrial process equipment such as pipes and heat exchangers.