A laser marking machine is a machine that uses a laser beam to permanently mark the surface of various substances. The working mechanism of the marking machine is to engrave exquisite patterns, trademarks and characters by evaporating the surface material to expose the deep material.
Common laser marking machines include fiber laser marking machine, ultraviolet laser marking machine and carbon dioxide laser marking machine. This article will mainly introduce the difference between fiber laser marking machine and UV laser marking machine.
1. Different processing methods:
The fiber laser marking machine uses fiber grating as the resonant cavity of the fiber laser, and uses a tree-branch-type cladding fiber made of a special process to introduce multi-mode pump light from the fiber fork, so that the pump traverses a line in the tree-branch fiber. Fine rare-earth doped single-mode fiber core. When the pump light traverses the single-mode fiber core each time, the atomic pumping of rare earth elements will reach the upper energy level, and then the spontaneous emission light will be generated through the transition. The spontaneous emission light is amplified by oscillation and finally produces the laser output.
The UV laser marking machine focuses the high-energy laser beam on the surface of the material, interacts with the material on the surface of the marker, and displays the desired marking pattern and text. Ultraviolet laser marking machines usually have two methods of thermal processing and cold processing. The thermal processing laser marking method is that the laser outputs a high-energy laser beam. When the laser beam contacts the marking material, it interacts with the surface of the material to convert the light energy into heat energy, so that the surface temperature of the marking material rises and rapidly melts and burns. Erosion, evaporation and other phenomena, and then the formation of graphic marks.
2. Different application fields
Fiber laser marking machine is suitable for most metal materials and some non-metal materials. It can process a variety of non-metals, especially high hardness, high brittleness and high melting point materials. At the same time, because it has the advantages of high production efficiency, stable and reliable processing quality, and good economic and social benefits, it has a very wide range of applications in business, communication, military, medicine, etc.
UV laser marking machine is suitable for laser flying marking of most materials, especially for plastic materials. Unlike the optical fiber and carbon dioxide laser marking machine, the UV laser marking machine adopts the method of heating the surface of the material. It belongs to cold light engraving, so it is especially suitable for marking food and pharmaceutical packaging materials.
Post time: Mar-23-2022