Application of 355nm Ultraviolet Nanosecond Laser for Cable Laser Marking

With the gradual expansion of my country's wind energy, solar energy and other clean energy construction scale, and the vigorous development of smart grid, new energy vehicle charging piles, rail transit and other industries, the market demand for cables is increasing day by day.

In order to better distinguish and identify products, cables need to be marked with product specifications, standard certification, brand and other information on the surface before leaving the factory, and there is no doubt that these marks must be exposed to harsh environments such as water, soil, sand, and air for a long time. After that, it can still remain clear, not falling, and easy to read.

Laser marking technology is one of the key technologies in cable manufacturing. It has the advantages of good focusing performance, energy concentration, small heat-affected area, high processing accuracy, and fast speed. The marking is permanent, not easy to wear, and cannot be changed. The marking process There are no other consumables, no harmful gas, and a high degree of automation. Any marking can be programmed through a computer and can be repeated. It makes up for the shortcomings of traditional ink jet codes that are easy to fall off, easy to blur, and not environmentally friendly. The marking is also anti-counterfeiting. and traceability.

The 355nm ultraviolet nanosecond laser is a "cold" laser with a narrow pulse width (about 25ns), the output 355nm ultraviolet light has a short wavelength, and the material has a high absorption rate. This process is different from the evaporation of the surface material produced by the long-wave laser to expose the deep material, which does not damage the surface of the cable. The entire marking process generates negligible heat, which can be described as "cold" processing and is commonly used in the field of cable manufacturing.

Moreover, the 355nm wavelength ultraviolet light is very easy to focus. Under the blessing of excellent beam quality (M2<1.2), the focusing spot is extremely small, which is in the micron level. It is often used for ultra-fine, high-resolution, high-contrast marking and engraving. It can meet the marking requirements of small information, and can mark various complex graphics, logos and standard certifications. It has strong anti-counterfeiting properties and is not easily copied and changed. In addition, laser marking is very flexible, and can mark circular, curved, bar-shaped specifications, dates, pictures and texts, applications and other information at different angles on the surface of the circular cable at any time, which is also unmatched by traditional marking methods.