20KHz Ultrasonic Tin Dipping Machine Flux-Free Tin Coating Equipment

Ultrasonic tinning equipment is a highly efficient, automated industrial device specifically developed for tinning precision metal workpieces. Utilizing high-frequency ultrasonic vibration technology, it overcomes the pain points of traditional tinning processes, such as reliance on flux, poor plating quality, and low efficiency. It is primarily used for surface tinning of copper, aluminum, and copper-aluminum composite wires; pins of electronic components such as micro-sensors and connectors; PCB pads on high-density circuit boards; and the tabs of power batteries and energy storage batteries. The equipment directly removes the oxide layer from the metal surface through high-frequency ultrasonic vibration, achieving efficient and uniform tinning with little or no flux. It is widely applicable to precision manufacturing fields such as electronics, new energy, automotive, photovoltaics, aerospace, and medical devices.

The core working principle of the equipment is as follows: During the tinning process, the ultrasonic transducer on the equipment converts high-frequency electrical signals (common frequency range 20KHz-40KHz) into high-intensity mechanical vibrations. This vibrational energy is precisely transmitted to the interface between the molten solder and the workpiece through a specially designed transducer, triggering a strong ultrasonic cavitation effect. A large number of tiny bubbles are instantly generated in the molten solder. These bubbles rapidly expand and burst under pressure, releasing localized high-pressure impact. This not only thoroughly breaks down the oxide film and attached impurities on the workpiece surface but also refines the tin liquid crystal particles and reduces the surface tension of the molten solder. Simultaneously, the molten solder fully wets the workpiece surface under vibration, quickly and tightly adhering to form a uniform and dense tin layer, ultimately achieving a high-quality tinning effect free of pores, burrs, and cold solder joints.

Compared to traditional manual tinning and hot air tinning processes, this equipment, with its core advantage of "flux-free tinning," effectively avoids problems such as workpiece corrosion and decreased conductivity caused by flux residue, fully complying with international environmental standards such as RoHS and REACH. At the same time, the adhesion, conductivity, and corrosion resistance of the coating are significantly improved, meeting the stringent quality requirements of high-end precision manufacturing. In addition, the equipment can be flexibly adapted to desktop stand-alone operation, vertical semi-automatic production lines, and fully automatic production lines, greatly improving batch processing efficiency and reducing labor costs, making it an ideal solution for achieving high-quality tinning in the precision manufacturing field.