Knowledge Related to Ultrasonic Cleaning Machines
Release time:
2021-10-16
Ultrasonic cleaning machines include single-tank ultrasonic cleaning machines, non-standard ultrasonic cleaning machines, standard ultrasonic cleaning machines, circulating filter ultrasonic cleaning machines, and spray nozzle plate ultrasonic cleaning machines, among others.
Ultrasonic cleaning machines include single-tank ultrasonic cleaning machines, non-standard ultrasonic cleaning machines, standard ultrasonic cleaning machines, circulating filter ultrasonic cleaning machines, and spray nozzle ultrasonic cleaning machines.
Main parameters of ultrasonic cleaning machines
Ultrasonic cleaning is based on the cavitation effect, which means countless bubbles rapidly form and implode in the cleaning solution. The resulting shock will strip away dirt from the surfaces of the workpieces submerged in the cleaning solution. As the ultrasonic frequency increases, the number of bubbles increases while the explosive impact decreases; therefore, high-frequency ultrasound is particularly suitable for cleaning small particle dirt without damaging the surface of the workpiece. Bubbles are generated by applying high-frequency (ultrasonic frequency) and high-intensity sound waves in the liquid. Therefore, any ultrasonic cleaning system must have three basic components: a tank for holding the cleaning solution, a transducer that converts electrical energy into mechanical energy, and an ultrasonic generator that produces high-frequency electrical signals.
Ultrasonic cleaning machine
(1) Frequency: ≥20KHz, which can be divided into three segments: low frequency, medium frequency, and high frequency.
(2) Cleaning medium: Ultrasonic cleaning generally uses two types of cleaning agents: chemical solvents and water-based cleaning agents. The chemical action of the cleaning medium can accelerate the ultrasonic cleaning effect; ultrasonic cleaning is a physical action, and the combination of the two actions allows for thorough and complete cleaning of the items.
(3) Power density: Power density = emission power (W) / emission area (cm2), usually ≥0.3W/cm2. The higher the power density of the ultrasound, the stronger the cavitation effect, the faster the speed, and the better the cleaning effect. However, for precision items with very high surface finish, prolonged high power density cleaning can cause "cavitation" corrosion on the surface of the items.
(4) Ultrasonic frequency: The lower the ultrasonic frequency, the easier it is to generate cavitation in the liquid, and the greater the force produced, making it suitable for initial cleaning of rough and dirty workpieces. Higher frequencies have stronger directionality, making them suitable for cleaning fine items.
(5) Cleaning temperature: Generally, the cavitation effect of ultrasound is best at 30℃-40℃. The higher the temperature of the cleaning agent, the more significant the effect. Typically, when applying ultrasound, a working temperature of 50℃-70℃ is used.
Precautions for using ultrasonic cleaning machines:
(1) The power supply and electric heater power supply of the ultrasonic cleaning machine must have a good grounding device.
(2) It is strictly prohibited to operate the ultrasonic cleaning machine without cleaning liquid, meaning that the cleaning tank must have a certain amount of cleaning liquid before the ultrasonic switch can be turned on.
(3) For cleaning equipment with heating devices, it is strictly prohibited to turn on the heating switch when there is no liquid.
(4) It is forbidden to strike the bottom of the cleaning tank with heavy objects (iron pieces) to avoid damaging the energy converter chip.
(5) The power supply for the ultrasonic generator should use a separate 220V/50Hz power supply and be equipped with a voltage stabilizer of over 2000W.
(6) The bottom of the cleaning tank should be regularly rinsed and should not have excessive debris or dirt.
(7) After replacing the cleaning liquid, wait for the ultrasonic to start before washing the items.
Other applications of ultrasonic cleaning machines
Cleaning of silicon materials, silicon wafers, electronic appliances, medical devices, metal stamping parts, oil pump nozzles, compressor parts, and spray plates and filter cores in the chemical fiber industry, as well as various metal components.
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