Glass products are widely used in construction, daily use, medical, chemical, household, electronics, exterior, nuclear engineering and other fields. Glass has the characteristics of brittleness. Therefore, when carving and marking the surface of glass products, the process requirements are very high. Laser marking machine processing time is short, and the marking lines are fine. It is very suitable for drawing or text information symbols on the surface of the glass material.
What are the methods of laser marking on glass?
1. Using multiple laser radiation
A single laser shot is selected to produce a well-defined visible symbol on the glass, but the direction of the crack and stress pattern will propagate perpendicular to the direction of laser travel.
In a short time or even a few days after the mark is printed, these cracks perpendicular to the direction of the laser movement will form new cracks, which will expand to the vicinity of the original mark and form fragments, thus affecting the clarity of the mark. Using multiple laser irradiations, the areas adjacent to the marked area are heated by thermal conduction, thereby forming a stress gradient in these areas and reducing the possibility of secondary cracking.
2. Discrete points constitute annular crack method
Use a series of annular cracks to form text, barcodes, square or rectangular codes, and other shape code images. Glass undergoes heating and cooling cycles occur low density annular cracks. When the glass is heated, it expands and squeezes the surrounding material. When the temperature rises to the softening point of the glass, the glass rapidly expands to form a dome of low-density material protruding from the glass surface.
3. The occurrence of crack-like surface crack method
The same heating and cooling process is used to change the surface of a particular volume of glass. The cracked exterior glass is not only environmentally friendly, but also has the effect of ice cracking and non-fully transparency, so it is widely used in interior decoration, such as partitions, background walls, and glass furniture, deeply loved by consumers.