355nm UV nanosecond laser marking air switch

Nowadays, all kinds of electronic and electrical products have been moved into indoor buildings such as homes, offices and factories. At the same time, with the standardization of decoration and decoration, air switches have become a necessity for circuit safety. Once a trip occurs, people only need to open the switch box, accurately find the circuit "in charge" of each part of the switch according to the marks on the air switch, and conduct a simple investigation.

Therefore, whether the marking on the surface of the air switch is clear or not is very critical.

The air switch is a plastic product. In the past, the trademarks, barcodes and numbers on its surface were mainly completed by label sticking, mold imprinting or inkjet printing. The advantages of these traditional marking methods are low input cost and obvious disadvantages: lack of Flexibility, non-permanent marking, insufficient clarity, many consumables and possible environmental pollution, etc.

In recent years, laser marking of plastics has become the mainstream of industrial applications, improving production efficiency and reducing equipment production costs. Compared with traditional marking processes, it has great advantages and has a tendency to replace them. It is a popular marking technology. The type of laser used in the laser marking plastic process is also known as the 355nm ultraviolet nanosecond laser. With the characteristics of short wavelength, high single photon capability, high peak power, and narrow pulse width, it can bring high contrast and narrow pulse width on the surface of plastic products. Line width, low-carbon marking is one of the current mainstream industrial-grade lasers for laser marking, and has been widely used in 3C consumer electronics, electrical, medical and health, automotive industry and other industries.

The single photon of the 355nm ultraviolet laser reaches 3.49eV, the C-C bond energy in plastic products is 3.44eV, the C-O bond energy is 3.37eV, and the C-N bond energy is 3.16eV, the single photon energy of visible ultraviolet light is higher, suitable for plastics such as The materials with high thermal radiation reaction are finely marked, and most materials have high absorption rate of ultraviolet light, which makes it easy to break the chemical bonds when the high-energy density 355nm ultraviolet light acts on the plastic surface, without causing thermal damage to the material. , The narrow pulse width of about 25ns also makes the heat of the laser fade away before it can gather, and the heat-affected zone is very small. This marking process is also called "cold processing".

355nm 자외선 나노초 레이저의 빔 품질은 높고(M2<1.2), 자외선은 집속하기 쉽기 때문에 검류계에서 출력되는 스폿의 직경은 미크론 수준에 도달할 수 있습니다. 이러한 작은 스폿 직경은 마킹 효과를 고대비, 선명한 가장자리 및 표시합니다. 표면이 매끄럽고 자연스럽고 주변 재료를 손상시키지 않으며 미세하고 영구적입니다. 기존 기호 및 생산 날짜를 표시하는 것 외에도 복잡한 QR 코드 마킹을 수행할 수 있으므로 제품의 위조 방지 및 추적 가능성을 더 높은 수준으로 향상시킬 수 있습니다.

레이저 가공에는 소모품이 없고 유연성이 높으며 통합이 쉽다는 점을 언급할 가치가 있습니다. 자동 처리를 실현하고 처리 효율성을 향상시키는 것은 쉽습니다. 이는 에어 스위치 처리에도 큰 의미가 있습니다.