Ultrasonic plastic welding principle is generated by the generator 20KHz (or 15KHz) high-pressure, high-frequency signal through the transducer system, the signal is converted to high-frequency mechanical vibration, added to the plastic workpiece, the workpiece surface and the intermolecular Friction and make the temperature transmitted to the interface, when the temperature reaches the melting point of the workpiece itself, the rapid melting of the workpiece interface, and then fill in the gap between the interface, when the vibration stops, the workpiece at a certain pressure cooling set, To achieve a perfect welding. A new type of ultrasonic plastic welding machine, the welding of soft PE, PP material, as well as large diameter, long length of plastic welding parts, has a unique effect, to meet the needs of a variety of products,