Laser marking is one of the most widely used technologies in the field of laser processing. Laser marking technology is the crystallization of contemporary high-tech laser technology and computer technology. Laser marking technology, also known as laser marking and laser marking, has been used more and more in the printing field in recent years. Laser marking can be applied to a variety of materials including plastics and rubber, metal, silicon wafers. Compared with traditional mechanical engraving, chemical etching, screen printing, and ink printing, laser marking has low cost, high flexibility, and can be controlled by a computer system. The strong permanentness of the mark generated by the laser on the surface of the workpiece is Its outstanding features. The laser marking system can implement a single identification number for the mass-produced workpieces, and then mark them on the product in a row or two-dimensional code array, which can effectively help the production process control, quality control and prevent counterfeit products. At the same time, various metal materials and some non-metal materials can be written or made permanent imprinting marks that are difficult to copy. Through computer input and output, galvanometer scanning mode is adopted, and the speed is fast; the fully enclosed light guiding system has strong adaptability to the environment; the combined internal structure is convenient for maintenance and maintenance; especially suitable for online operation. The application range is very wide, such as various hardware products, metal utensils, precision instruments, auto parts, electronic components, knives, gifts, watches, plumbing equipment, glasses frames, luggage buckles, zippers, buttons, shoe buckles, computer keyboards, etc. Product trademark, batch number, date, barcode, marking and so on.
The basic principle of laser marking
The basic principle of laser marking is that a high-energy continuous laser beam is generated by a laser generator. When the laser acts on the substrate, the atom in the ground state transitions to a higher energy state; the atom in the higher energy state is unstable. It will quickly return to the ground state. When the atom returns to the ground state, it will release extra energy in the form of photons or quantum, and convert the light energy into heat energy, so that the surface material is instantly melted and even vaporized, thus forming a graphic mark.
Laser marking features:
1. Wide range of applications: Marking on almost all materials
2. High marking efficiency: the laser beam under computer control can move at high speed (line speed of 5-10 meters per second). The normal marking process can be completed in a few seconds, enabling online marking
3. High marking accuracy: The laser can form a very thin beam. The thinnest line width on the surface of the material can reach the order of micrometers. It can print various graphics, trademarks, barcodes and two-dimensional codes. Laser marking can also improve the appearance of the product and the brand name effect, and enhance the market competitiveness of the product.
4. Low cost of use: laser marking is non-contact marking