Question: I want to engraving logo on glasses, which laser machine should be used?

Answer:  UV Laser Marking Machine

Glass products are widely used in construction, daily use, medical, chemical, household, electronics, instrumentation, nuclear engineering and other fields. Glass products play a very important role in our lives, such as glass cups, glass coffee tables, glass decorations, glass tableware and so on. They are closely related to our lives. With the continuous development of technology, all kinds of glass decorate our colorful life world. Carving, printing, laser patterns, and patterns on glass are already a very common technology, and technology continues to innovate and refresh our perception of products.

For a laser marking machine to be able to engrave glass, its energy density must be greater than a certain threshold value, or threshold value, which causes the glass to be destroyed, and the energy density of the laser somewhere is related to the size of its spot at that point. The same laser, The smaller the spot, the greater the energy density. In this way, through proper focusing, the energy density of the laser can be lower than the damage threshold of the glass before entering the glass and reaching the processing area, and exceeding the critical value in the area to be processed, generating a pulse in a very short time. The energy can instantly break the crystal by heating, resulting in extremely small white spots, carving a predetermined shape inside the glass, while the rest of the glass or crystal remains intact.

Multiple laser irradiation

The glass laser marking machine uses a laser radiation to generate a marked contour mark on the glass surface. After a few days, the laser extends to the area near the original mark to form fragments, and then uses more radiation to heat the area adjacent to the marked area through heat conduction In order to reduce the possibility of secondary rupture, it is very effective to use laser marking machine multiple laser radiation method to mark on soda lime glass and borosilicate glass. A single laser irradiation is more effective for marking on fused silica glass and quartz glass because the expansion coefficient of these two materials is very low.

Discrete point formation ring crack method

Glass laser marking machines use a series of annular cracks to form text, bar codes, square or rectangular codes, and other shape code patterns. There are many CO2 laser marking machines that use this method. CO2 laser marking machines set a parameter for marking and marking on glass, which results in less cracks. Discrete points appear to form annular cracks. The glass undergoes low-density ring cracks through heating and cooling cycles. When the glass is heated, it expands and squeezes the surrounding materials. When the temperature rises to the softening point of the glass, the glass expands rapidly to form a dome of the low-density material protruding from the glass surface.

Crack-like surface crack method

The glass laser marking machine produces a crack-like surface crack method. The process of heating and cooling is used to change the affected glass surface. This method is not immediately visible. It is started after the laser is pressed slightly. Cabinet-shaped cracks occurred in the marked area. This method can print clear marks on high-quality automotive glass, which requires purity to the surface.

If you still don’t understand, please contact Focuslaser .