Laser marking machine is a laser beam that permanently marks the surface of various materials. The effect of marking is to expose the deep material through the evaporation of the surface material, or through the chemical and physical changes of the surface material caused by light energy."Engraving traces, or burning away part of the material through light energy, showing the desired etched pattern, text, etc. There are two principles of laser marking machines, namely cold processing and thermal processing.
“Thermal processing”It refers to the laser with high heat (concentrated energy flow), which is irradiated on the surface of the material to be processed. Because the surface of the material absorbs the energy of the laser, a thermal excitation process occurs in the irradiated area, and finally the surface of the material (or coating) ) The temperature rises, resulting in metamorphosis, melting, evaporation, ablation and other phenomena. Such as Correct Pack fiber laser marking machine“cold working“Refers to (ultraviolet) photons with a very high load energy, which can break chemical bonds in materials (especially organic materials) or surrounding substances, resulting in non-thermal process damage to materials. This kind of cold processing has special significance in laser marking processing, because it is not thermal ablation, but does not produce"heat damage"Side effect, cold peeling that breaks chemical bonds, so it does not produce heating or thermal deformation on the inner layer and nearby areas of the processed surface.
Such as Correct Pack UV laser marking machine For example, in the electronics industry, it is used to deposit chemical thin films on substrate materials, and to open narrow grooves on semiconductor substrates. Comparison of different marking methods Compared with the inkjet marking method, the advantage of laser marking (grooving) is that it has a wide range of applications, and a variety of materials (metal, glass, ceramics, plastics, leather, etc.) can be marked with permanent high marks. quality marks. There is no force on the surface of the workpiece, no mechanical deformation, and no corrosion on the surface of the material.