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Methods Of Glass Laser Marking

Jan 31.2018

Glass products have been widely used in the fields of architecture, medicine, chemistry, home, electronics, instrument, nuclear engineering and so on. Glass has a fragile property, so it is engraved on the surface of glass products, and it is high demanding for the processing.

Ordinary glass processing technology

1 etching method
The chemical agent hydrofluoric acid is used to corrode glass. First use paraffin to melt and cover glass, engraved on the surface of paraffin, then smear hydrofluoric acid and then wash away paraffin. Because the hydrofluoric acid is volatile and the pollution is serious, it needs the protective layer and the operation is more complicated.

2  Heat processing
Thermal processing is used to improve the appearance quality of the processed materials, including flame cutting, fire polishing, drilling and so on. But the brittleness of the glass is high, and it is easily cracked by the influence of high temperature, which destroys the material.

Screen printing
The principle of silk printing is to print the ink to the surface of the flat glass, and then use the curing measures of the ink to make the pattern strong.

4 laser marking
Laser marking is a light motor integrated device controlled by a software system. It is produced by software control graphics, using non - contact machining, so that the glass will not be damaged by external force, and the effect of glass perfection and precision is good.

There are also several process methods for laser marking on glass. The process is as follows:
1 multiple laser radiation methods
Using a laser radiation generated in the glass surface marker profile obviously, a few days after the laser is extended to the original tag area near the outside into fragments, then the number of radiation, so that adjacent regions with marked regional is heated by heat conduction, so that these areas form a stress gradient, thereby reducing the two rupture possibility is very effective with this method of marking in sodium calcium glass and borosilicate glass. This method can be used in small glass bottles filled with liquid drugs and in life glasses.

2 discrete point forming ring crack method
A series of circular cracks are used to form text, bar code, square or rectangular code, and other shape code patterns. In this way, there are more commonly used CO2 laser marking machines. The CO2 laser marking machine has fewer cracks produced by setting up a marking code on glass. A circular crack is formed by the emergence of a discrete point. Low density annular cracks are produced by heating and cooling the glass. When heated, the glass expands and extrudes the surrounding materials. When the temperature rises to the point of softening point of glass, the glass expands rapidly to form a low density material protruding the dome of the glass surface. Using the CO2 laser marking machine, the merchant can mark the fine pattern on the surface of the glass and form the grade of the glass.

3 crack shaped surface crack method
The process of heating and cooling can change the surface of the treated glass. This method is not immediately seen. It begins to produce turtle cracks along the laser marking area after a slight pressure. The crazing surface glass not only has the property of safety glass, but also has the effect of non transparent ice cracking, so it is widely used in interior decoration, such as partition, background wall, and it can also be used for glass furniture and is loved by consumers.

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