Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded, and the two surfaces rub against each other through pressure to form the fusion between molecular layers.

Its working principle is to convert 50/60Hz current into 15~40KHz electric energy through ultrasonic generator, and the converted high-frequency electric energy is converted into mechanical motion of the same frequency again through transducer, and then the mechanical motion is transmitted to the welding head through a set of amplitude transformer device that can change the amplitude. The welding head transmits the received vibration energy to the joint of the workpiece to be welded, and the vibration energy in this area is converted into heat energy through friction, melting the area of the parts to be welded, and then welding is completed.

On the mask, we can see some indentations everywhere, such as edge sealing, ear band, exhalation valve, etc. If you want to efficiently produce high-quality masks with competitive advantages in the market, using ultrasonic welding technology can achieve twice the result with half the effort. In the production process of the mask, the welding of the all-plastic nose bar on the mask, the welding after flanging, the welding of the breather valve, the multi-layer roll welding, and the ear band welding are all completed by the ultrasonic welding process.