The LIS (laser induced welding) process allows laser transmission welding of components which may exhibit localised joint gaps. In the joint gap region the melting mass of the absorbent joint part undergoes additional volume expansion as a result of foaming and comes into contact with the transparent joining partner fusing its surface and forming the weld joint, even if larger clearances (up to about 0.35 mm) exist. The additives for the LIS process are a new development and round out the range ofFabulase agents for laser welding and marking. The LIS process was originally developed by Chemische Fabrik Budenheim KG for laser marking to generate embossed structures (e. g. Braille or decors) on plastic surfaces. The cooperation with TechnoScriptum and Fraunhofer ILT finally made it possible to extend and optimise this technique for laser transmission welding applications.
展开▼
