Guangzhou supply the best glass laser marking machine

Ordinary glass laser marking is now basically used laser marking machine CO2 laser marking, and laser on the glass is prone to cracking when marking, to tell you the following Lasse laser laser marking control method for a first crack The method is the use of multiple laser radiation; The second method is the use of discrete points to form a cyclic crack; third method is to produce crack-like surface cracks. Using a laser irradiation can produce a clean-cut visible mark on the glass, but the direction of the crack and stress patterns will be perpendicular to the moving direction of the laser extension. A short time even after a few days, these vertical cracks in the moving direction of the laser beam will be formed after the mark to print a new crack, extending to the vicinity of the area outside the original mark fragmented, thus affecting the mark clarity. Use multiple laser radiation, so that the marked area adjacent to the area to be heated by heat conduction, so that these regions are formed stress gradient, reducing the possibility of secondary rupture. In this way marking on soda lime glass and borosilicate glass is very effective. A laser radiation in the melt into the marking on silica glass and quartz glass is more effective, because a low coefficient of expansion of these two materials. The second method is to use a series of cyclic crack formation text, bar codes, square or rectangular shape code and other code patterns. Glass produce cyclic crack density by heating and cooling cycles. When glass is heated squeezed produce expansion of the surrounding material, when the temperature rises to a glass softening temperature, the glass dome of the rapid expansion of the formation of a convex glass surface density of the material. After heating the glass surface shrink to the initial position, but this time it is the entire low-density form of relaxation time, making it impossible to return to the starting position prior to the softening temperature. Since the spot with a Gaussian distribution, so the higher the temperature at the center spot. Back when the high temperature zone close to the initial position, in the center of the annular region formed cracks. Forming the junction area and standard density area between the formation of a stable ring crack density. This method is suitable for ordinary optical materials and tempered glass, chemically reinforced glass or soda-lime float glass marking. The third method is using the same heating and cooling process, the glass surface is a particular volume changes. But the third method used by the spot size is relatively large, in both density region junction boundary crack method that does not ring clear. Marking produced in this way can not immediately visible, requires a little pressure before starting to generate the trellis crack along the laser tag area. Form of text, graphics and a variety of code with no debris filling cracks stripe pattern generated. Because this method requires pure surface, use high-quality automotive glass can print out a clear mark. In fact, glass laser marking laser device is best UV laser marking machine, but the price is more expensive, but a lot of good marking effect than CO2 laser marking machine to play the effect, because ultraviolet laser is a cold light source, in the glass Marking will not crack phenomenon