The general working effect of the laser marking machine is that it can mark the surface of different substances for a long time. Its principle can be considered that the deep substances are covered by the cooling of the surface substances (ultraviolet laser marking machine), or the surface substances are changed into "engraving" (light / CO2) by the chemical and physical reaction of light energy, However, people who have not been in contact with the material will think that light energy causes light contact processing on the surface of the material to display and engrave patterns and characters by burning the surface.
The UV laser marking machine to be mentioned here can be known from its laser head that the UV laser is a cold processing with high load, which can break the chemical bond in the material or the surrounding medium to cause the material to be destroyed by non thermal process again. This kind of cold processing has a similar meaning in laser marking processing, because it is not a thermal laser, but a cold extrusion that does not produce the side effect of "thermal damage" and stops the chemical bond, so it does not produce cooling or thermal deformation on the inner layer and the surrounding area of the processed surface. We can call this processing process "photo etching" effect.
In the field of modern precision machining, because the traditional laser marking machine uses laser thermal processing technology, the precision has limited development. Under such a background, the ultraviolet laser marking machine has become the darling of the new era. With the rapid development of laser equipment and the improvement of the power of UV laser marking machine, UV laser marking machine has been applied to the ultra-fine processing high-end market, and the surface marking of packaging bottles of iPhone, cosmetics, drugs, food and other polymer materials; Marking and dicing of flexible PCB; Micro hole and blind hole processing of silicon wafer; LCD liquid crystal glass, glassware surface, metal surface coating, plastic keys, electronic components, gifts, communication equipment, building materials and other fields. Many signs that are common in our daily life, such as marks, words and patterns on metal or non-metal, BMW logo, mobile phone buttons, etc., are marked by ultraviolet laser marking machine. The principle is that the laser light energy of the ultraviolet laser marking machine evaporates the surface layer of the target material to expose the deep layer of the material, so as to "carve" the required pattern characters. In short, it is to use the laser beam to print long-term marks on the surface of various materials.
After understanding the working effect and working principle of the UV laser marking machine, it is not difficult to see that the cold processing indeed has a great improvement in processing compared with the hot processing, but it is not absolute. It provides enterprises with multiple choices. In the future, it is not certain that other laser heads will be developed. At this stage, the UV laser marking machine can be considered as the right-hand assistant of enterprises.