In the quasi-simultaneous welding method, the whole joint line is plasticized at the same time. The laser supplies energy continuously until the specified welding depth has been reached.
A galvanometer-scanner guides the laser beam along the joint line. The beam can be controlled in the X and Y directions. Because of the fast scanning speed, the material melts along the whole joint line so that the welding partners join quasi-simultaneously along this seam. Measuring the melt collapse (melt travel monitoring) allows the qualitative evaluation of the welding process results. Pyrometer control reliably identifies any anomalies in the joint line.
Quasi-simultaneous Welding - Animation
Very flexible because of the programmability of the scanning units,
corrects the welding contour or new products without requiring different optics and masks
ideal for components up to 400 mm x 400 mm max,
much lower tool costs compared to competing methods.
One of the main areas of application of quasi-simultaneous welding is to reliably seal sensor or electronics housings. The plus points for laser plastic welding here are the clean and reliable joins, as well as the very good economics.
