With the development of science and technology, laser technology is also developing. At the same time, laser marking machines
have been used for various industries to mark products. Laser marking
is the use of a laser beam to mark permanent surfaces on a variety of different materials. The effect of marking is to expose deep substances by evaporation of surface substances, or "engraving" traces by chemical or physical changes of surface substances caused by laser, or burn off some substances by laer to show the desired etching,pattern and text.
What is the laser marking working principle?
Currently,laser marking working principles are "hot processing" and "cold processing."
"Hot processing" is a higher laser beam (which is a concentrated energy flow) that illuminates the surface of the material, and the surface of the material absorbs laser energy, creating a thermal excitation process in the illuminated area, causing the temperature of material surface rises, generating metamorphosis, melting, ablation and evaporation.
"Cold processing" is photons with very high load energy can break chemical bonds in materials (especially organic materials) or surrounding material to cause non-thermal process damage. This cold working has special significance in laser marking processing because it is the cold peeling of the chemical bond, no "thermal damage" side effects, so that the inner layer and the vicinity of the surface are not produces heat or thermal deformation.
The laser marking and engraving machine
can engrave metal and a variety of non-metallic materials. It is more suitable for higher precision application,such as electronic components, integrated circuits, electrical appliances, mobile communications, hardware, tool accessories, precision equipment, glasses and clocks, jewelry, auto parts, plastic buttons, building materials nad PVC pipe.