In the wide application of laser technology, laser marking has become an indispensable part of modern industrial manufacturing with its efficient, accurate and contactless processing characteristics. In particular, the ultraviolet laser marking device, with its unique three-order intracavity frequency doubling technology and 355nm wavelength ultraviolet laser, realizes the "cold processing" of the surface of the material, greatly reducing the problem of thermal deformation of the material, while showing excellent performance in the field of ultra-fine processing. However, behind all these achievements, there is a key supporter - laser heat sinks.

The importance of laser heat sinks

During the laser marking process, a large amount of heat is generated inside the laser. If the heat is not distributed in a timely and effective manner, it will not only affect the stability and life of the laser, but also adversely affect the processing quality. Therefore, the laser heat sink is an important part of the laser, and its performance is directly related to the efficiency and effect of laser marking.

The choice of cooling technology

In view of the heat dissipation requirements of UV laser markers, there are mainly two heat dissipation methods: air cooling and water cooling.

Air-cooled heat dissipation: This method mainly relies on the flow of air generated by the fan to take away the heat. It has the advantages of simple structure and low cost, and is suitable for low power pulsed laser and continuous laser. However, with the increase of ultraviolet laser power, the efficiency of air-cooled heat dissipation gradually appears insufficient. Especially in high temperature environments, the temperature difference between the air and the heat sink is reduced, and the heat dissipation effect will be greatly reduced.

Water-cooled heat dissipation: In contrast, water-cooled heat dissipation technology has higher heat dissipation efficiency. It uses the high heat transfer coefficient of water (1000-15000 W /㎡▪k) to carry away the heat generated inside the laser by circulating water. This method can not only effectively deal with the heat dissipation requirements of high-power lasers, but also maintain a stable heat dissipation effect when the ambient temperature is high. Therefore, most of the middle and high power ultraviolet lasers use water cooling as the main heat dissipation measure.

Conclusion

Ultraviolet laser marking device occupies an important position in modern industrial manufacturing with its unique advantages. As a key component to ensure its stable and efficient operation, the laser heat sink's performance directly affects the quality and efficiency of laser marking processing. Therefore, when selecting and using a laser heat sink, we need to make comprehensive considerations according to the specific needs of the ultraviolet laser and the working environment to ensure the smooth progress of the laser marking process and the steady improvement of processing quality.