What is the function of the film used in ultrasonic welding?

After ultrasonic welding, it is often seen that dents or scalds appear in the local position of the product surface, which affects the appearance. Generally speaking, for internal components, a slight squeeze is acceptable; But for the appearance part, it is unacceptable. Protective film, also known as buffer layer, is usually placed between the welding head and the product. It plays a buffering role and protects the surface of parts from damage.

Ultrasonic welding protective film is a special protective film for ultrasonic compression protection. Actually, it was very good. It can prevent ultrasonic from crushing the embossed carcass and effectively enhance the ultrasonic pressing process. The use times are more than 10 times that of ordinary film, and it can be reused. High performance, the protective film is also adjusted according to the pressure, frequency and pressing time of ultrasonic wave, and the use times will be different. It can effectively solve the problems of ultrasonic pressure welding protection and appearance of electronic appliances, toys, auto parts, plastics and other products such as oil-filled plastic shell, ABS plastic shell, PC plastic shell and ABS+PC plastic shell.

Protective film is helpful to reduce the possible adverse effects of defects and changes (warping and deformation) of injection molded parts, fill the gap between product contour and part surface, and effectively reduce local contact pressure. The problem of squeezing or scalding is greatly reduced.