Traditional plastic welding uses ultrasonic welding, but ultrasonic welding has certain limitations. For example, contact welding is not conducive to mass automated production. Contact welding causes the product to have a certain probability of mechanical wear. The machinery will cause residual stress inside the product and reduce the mechanical strength of the product itself. performance. With the development and popularization of laser and laser welding technology, laser has also developed and promoted plastic stress welding. Compared with ultrasonic welding, the advantages of laser welding in plastic parts welding include: welding accuracy, firmness, sealing, airtightness, watertightness, and less resin degradation during the welding process.

In the plastic welding process, what are the advantages of ultrasonic and laser welding (Figure 1)


(Principle of ultrasonic welding)
                  

Easy to control, welding workpieces with small size or complex shape and structure. Because the laser is easy to control with computer software, the laser output can flexibly reach every detail of the part. Laser welding can weld areas that are difficult to reach with ultrasonic welding methods, and weld products with complex shapes or even three-dimensional geometric shapes;

In the plastic welding process, what are the advantages of ultrasonic and laser welding (Figure 2)

(Laser welding principle)
                  

Compared with ultrasonic welding methods, laser welding greatly reduces the vibration stress and thermal stress of the product. This means that the internal components of the product or device will age more slowly and can be used on products that are easily damaged. A variety of different materials can be welded. For example, polycarbonate and fiberglass-reinforced black polybutylene phthalate can be joined together using near-infrared lasers in a way that ultrasonic welding methods cannot.

Among many plastic parts or products, there is a coaxial small plastic product that is difficult to achieve, whether it is traditional ultrasonic welding or laser plastic welding, or the output and efficiency are very low.