What is the difference between UV laser marking machine and optical fiber marking machine and co2 marking machine

The principle of marking is similar, all of which use laser beams to make permanent marks on the surface of various substances. The effect of marking is to expose the deep material through the evaporation of the surface material, or to "engrave" traces through the chemical and physical changes of the surface material caused by light energy, or to burn off part of the material through light energy, showing the required etching. The pattern, text, and content to be marked on the product.

The light source of the laser generator is different

The ultraviolet laser marking machine uses a 355nm ultraviolet laser, which is an ultraviolet light source, also known as a blue laser beam. Generally, frequency doubling technology is used to convert the infrared light (1064nm) emitted by the solid-state laser into 355nm (three times the frequency). frequency), 266nm (frequency quadruple) ultraviolet light. Its photon energy is very large, which can match the energy levels of some chemical bonds (ionic bonds, covalent bonds, metal bonds) of almost all substances in nature, directly breaking the chemical bonds, causing the material to undergo a photochemical reaction without obvious thermal effect. called cold working. Not only the beam quality is good (fundamental mode output), but the focusing spot is smaller (the diameter is less than 3um, the divergence angle is 1/4 of that of the fiber pumped laser), the mechanical deformation of the material can be greatly reduced, and the thermal influence of processing is extremely small. , will not produce thermal effects, and will not cause material burning problems. The fiber laser marking machine uses a 1064nm fiber laser, which refers to a kind of laser produced by using glass fiber doped with rare earth elements (such as ytterbium) as the gain medium. It has a very rich luminous energy level, and the pulsed fiber laser wavelength is 1064nm (same as YAG, except that the working substance of YAG is neodymium) (the typical wavelength of QCW, continuous fiber laser is 1060-1080nm, although QCW is also a pulsed laser. , but the pulse generation mechanism is completely different and the wavelength is different), it is a near-infrared laser with high electro-optical conversion efficiency, and the output beam is cooled by air cooling with good quality and high reliability. It belongs to thermal processing. The carbon dioxide laser marking machine uses a gas laser with an infrared light band of 10.64 μm. The CO2 gas is charged into the high-voltage discharge tube to generate a glow discharge, so that the gas molecules release laser light, and the laser energy is amplified to form a laser beam for material processing. The laser beam vaporizes the surface of the processed object to achieve the purpose of engraving.

different processing methods

Generally, for fiber laser marking machine and CO2 laser marking machine, it is realized by the thermal effect of laser on the material, or by heating and gasifying the surface material to expose the deep layer of different colors, or heating the material by light energy Microscopic physical changes on the surface (for example, some nano-scale and ten-nanometer-scale micro-holes will produce a black body effect, light can rarely be reflected, making the material appear dark black) and its reflective properties will change significantly, or by light energy Certain chemical reactions occur during heating, and the required graphics, characters, two-dimensional codes and other information are displayed, and the UV laser marking machine can directly break a chemical bond of the material, which is the separation of molecules from the object and the use of chemical processing. The difference between these two different processing methods is that the laser physical processing method is mainly processed on the surface of the product and material, while the laser chemical processing method can use the laser to penetrate deep into the product material. processing inside.

Application areas vary

Fiber laser marking machine is the most commonly used laser marking machine at present, which can meet the permanent marking of most metal or non-metal substrates, and can make depth on hard materials, such as bearing marking, engine number marking, Metal nameplate marking, etc. Ultraviolet laser marking machine can realize ultra-fine marking and engraving, which is the preferred product for customers who have higher requirements for marking effect. Mainly aimed at plastic materials, such as: flexible PCB board, LCD, TFT marking, suitable for surface marking of glass, polymer materials and other objects, silicon wafer micro-hole, blind-hole processing, UV wavelength is only 355, hard material The depth above is basically impossible to hit. Although UV lasers can mark both metals and non-metals, due to cost factors, fiber lasers are generally used to mark metal materials, while UV lasers are used to mark products with high surface quality requirements that are difficult to achieve with CO2 laser marking machines, and the formation of high and low CO2 match. Among them, 80% of the data lines and adapters on the market are marked by UV laser marking.

Cooling method is different

There is a big difference between the application and observation of the UV laser marking machine, and we can also feel a certain difference in use. The UV laser marking machine generally requires water cooling, and air cooling has a certain limit in terms of cooling. In terms of weight and size, we can clearly see that the size of the UV laser marking machine is larger than other marking machines.

At present, the most widely used laser marking machine models on the market are divided into fiber laser marking machine, ultraviolet laser marking machine and CO2 laser marking machine according to the light source. These three types of models can cover almost all kinds of product marking applications. . Zhongdiao Laser provides customers with a complete set of system solutions for laser marking, laser welding, and laser anti-collision goods, and can provide you with a full range of laser marking machines of all types. Free proofing, product selection, technical guidance, installation training and other full life cycle, full process services, whether it is a high-end customer who has high requirements for processing quality, or a small and medium-sized customer with ordinary needs, you can find a suitable for you in Zhongdiao Laser laser marking machine. Zhongdiao Laser reminds you: Before purchasing a laser marking machine, you must first determine the material, material, type, type of the product to be marked, and whether it needs to meet the production method of the assembly line. Through these points to judge the kind of marking machine that the enterprise needs, this analysis and selection can reduce unnecessary costs and improve the efficiency of production work.

Shenzhen RFH Laser Technology Co.,Ltd was founded in 2007 with headquarters in Shenzhen High-Tech Industrial Park, branch offices in Wuhan and Suzhou and production base in Huiyang. 

As the leading industrial solid-state laser manufacturer, RFH laser company offer 355nm ultraviolet laser, 532nm green laser and customized laser for a broad range of commercial, industrial, and scientific applications.

UV lasers: https://www.rfhtech.com/uv-laser_c1 

green lasers: https://www.rfhtech.com/green-laser_c