Ultrasonic cleaning technology works by sending high-frequency sound waves through a liquid, causing both the liquid and the cleaning tank to vibrate at the same ultrasonic frequency. Each material has its own natural resonance frequency, which matches the sound wave frequency, resulting in the humming noise that people can hear. As the cleaning industry continues to evolve, more industries are adopting ultrasonic cleaning machines due to their efficiency and effectiveness.
These machines generate high-frequency electrical signals that are converted into mechanical vibrations by a transducer. These vibrations travel through the cleaning solution, creating thousands of tiny bubbles with diameters ranging from 50 to 500 micrometers. Under the influence of the sound field, these bubbles grow in the negative pressure regions and collapse rapidly under positive pressure. When they collapse, they release powerful shock waves and create intense pressure—up to thousands of atmospheres—helping to break down and remove dirt, oil, and other contaminants from the surface of the object being cleaned.
This phenomenon is known as cavitation. The collapse of bubbles also generates high temperatures and strong pressure, which assist in breaking down stubborn residues. For instance, when oil or particles are trapped on a surface, the ultrasonic process helps emulsify the oil and dislodge solid particles, ensuring thorough cleaning.
In applications where high power is needed without damaging the workpiece, low frequencies (20–30 kHz) are often used for heavy-duty or large objects. However, lower frequencies can produce significant noise, sometimes exceeding safety limits. In contrast, higher frequencies are preferred for delicate parts or situations where minimal surface damage is critical.
Before coating processes, it's essential to clean components thoroughly to remove core oils, fingerprints, dust, and other contaminants. The choice of cleaning agent must balance effectiveness with safety, avoiding corrosion or damage to the materials. Proper preparation ensures optimal results during the coating stage.
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