Laser Welding of Glass
Quick and Sterile
Laser welding of glass requires low thermal conductivity of the material which creates high temperature gradients when heated up locally and hence may involve a breakage. After pre-heating the material the laser process can be optimized in order to control the risk of breakage. Using a defocused laser beam reduces the temperature gradient within the welding zone. Scanner heads or rotary axes for cylindrical workpieces allow fast multiple passes over the entire weld contour ensuring a consistent temperature level throughout the complete welding seam. For laser welding of glass, CO2, Nd:YAG or diode lasers are the lasers of first choice. Compared to other joining techniques it benefits essentially from the sterile surface quality.