CO2 laser marking machines adopt a 10.64μm infrared gas laser. CO2 gas is injected into a high-voltage discharge tube to generate a glow discharge, causing the gas molecules to emit laser light. This amplifies the laser energy and forms a laser beam to process the materials, creating a clear, permanent, and indelible mark on the surface of the object being processed.
CO2 flying laser marking machines, also known as CO2 online laser marking machines, are primarily used for continuous laser marking of various product surfaces or packaging. Compared to traditional static laser marking machines, flying laser marking machines allow products to flow continuously on the production line during the engraving process, significantly improving production efficiency and making laser marking machines suitable for industrial assembly line production.
Principle of CO2 Laser Marking Machines:
CO2 laser marking machines adopt CO2 gas as the working medium. CO2 and other auxiliary gases are filled into a discharge tube. High voltage is applied to the electrodes, generating a glow discharge in the discharge tube, causing the gas to emit laser light with a wavelength of 10.64 μm. This laser light is amplified, scanned by a galvanometer, reflected by a reflector, and focused by a field lens. Under the control of a computer, both logos, images, text, numbers, and lines can be marked on workpieces according to users' requirement.
CO2 laser are molecular laser, primarily composed of CO2 molecules, which can exhibit various energy states depending on their vibrational and rotational patterns. The gas mixture (CO2, helium, and nitrogen) in CO2 is a low-pressure plasma formed by electron release. As described by the Maxwell-Boltzmann distribution law, molecules in a plasma exhibit various excited states, some of which exhibit high energy states, manifesting as asymmetric oscillations. These molecules can also occasionally lose energy when colliding with hollow walls or through natural emission. Through natural emission, this high-energy state descends into a symmetrical, oscillating form and emits photons (a beam with a wavelength of 10.6μm) that can travel in any direction. One of these photons propagates along the optical path and oscillates within the galvanometer. Subsequently, after reflection by the reflection mirror, the laser light within the resonant cavity forms a laser beam.
Features of CO2 Flying Laser Marking Machines:
1. Non-contact processing: Creates exquisite marks on any regular or irregular surface.
2. Wide range of applications: Marks on most non-metallic materials and some metals.
3. Low operating costs: Marking is fast, and the mark is completed in one go, requiring minimal consumables, resulting in low operating costs.
4. Assembly line marking: Can be integrated with other equipment on the production line to increase automation.
5. Clear, indelible, and aesthetic marks, effectively preventing counterfeiting, with a long service life and zero pollution.