The ultrasonic plastic welding machine is a machine that uses ultrasonic waves to weld. It is commonly used for plastic welding and it completely replaces the traditional industry of glue bonding. The process of ultrasonic welding is not combined with materials such as bolts, nails, clips, welding materials or adhesives. There are various methods of welding with ultrasonic plastic welding machines, such as fusion welding, riveting and spot welding.

　　When the ultrasonic wave acts on the contact surface of the thermoplastic plastic, it produces high frequency vibrations of several tens of thousands of times per second, which reach a certain amplitude. Because of the poor thermal conductivity of the plastic, a moment can not be timely distribution, gathered in the welding area, resulting in the rapid melting of the two plastic contact surface, coupled with a certain pressure, so that it is fused into one. When the ultrasonic waves stop working, the pressure is allowed to continue for a few seconds to solidify and form a solid molecular chain, thus achieving the purpose of welding, and the welding strength can be close to the strength of the raw material.

　　Ultrasonic plastic welding depends on three factors: the amplitude of the transducer head, the pressure applied and the welding time, etc. The welding time and head pressure can be adjusted, and the amplitude is determined by the transducer and the variable amplitude rod. These three quantities interact with a suitable value, the energy exceeds the appropriate value, the amount of plastic melting is large, the weld is easy to deform; if the energy is small, it is not easy to weld firmly, the added pressure can not be too large. This optimal pressure is the best pressure per 1mm of the edge of the welded part and the edge.

　　Ultrasonic welding is commonly used for plastic welding, it completely replaces the traditional industry of gluing, there are no bolts, nails, clips, welding materials or adhesives to bind the materials together in the ultrasonic welding process, it is faster than traditional adhesives or glues and the drying time is also very fast, the welding process can be easily automated and can be easily customised to suit the specific specifications of each type products are welded.