PRINCIPLE OF LASER PLASTIC WELDING
safe – flexible – fast – precise
Laser plastic welding has established itself as a particularly precise and hygienic process among other joining methods and offers a variety of methods for online-process-monitoring to ensure the quality.
The most popular variant of the laser plastic welding combines an upper part which is transparent for the laser wavelength with an absorbent base. The laser beam passes through the laser-transparent part and is focused onto the absorbing part, whereby this surface melts. By applying a joining pressure on the welded component halves, a cohesive connection is created.
The main applications for the laser welding of plastics can be found in the automotive, medical technology, pharmaceuticals and consumer products.
Due to the trend towards lightweight construction, the amount of plastic used in modern automobiles is continuously growing. Laser plastic welding has a good reputation in the automotive industry for a long time. The laser welds plastic components without mechanical stress, reduces the cost of the workpiece fixtures dramatically and represents a particularly reliable process.
Due to its excellent properties, the laser is a production tool of choice for welding of plastics in the medical and pharmaceutical industry. The requirements for medical devices are very strict. The welds have to be technically faultless and also have to show a visually excellent quality.
Due to the highly achievable throughput rates and the excellent quality, the laser welding of plastics has become indispensable in the production of modern electronics and consumer goods. When filigree assemblies or even different materials such as plastics with glass or metal have to be joined, the laser is the treatment of choice.
Applications for this process can currently be found in smartphones, printers and many other everyday devices. Some examples of laser-welded assemblies in electronics or consumer products: