Laser marking technology is one of the largest applications for laser processing. Laser marking is a marking method that uses a high-energy-density laser to locally illuminate a workpiece, causing a chemical reaction of the surface material to vaporize or undergo a color change, thereby leaving a permanent mark. Laser marking can produce a variety of text, symbols and patterns, and the size of the characters can range from millimeters to micrometers, which has special significance for the fine processing of the product. As a modern precision machining method, laser marking technology has obvious advantages compared with traditional processing methods such as corrosion, EDM, mechanical scribing and printing. The following focuses on the new application and new technology of several laser fine laser engraving on the surface treatment of 3C products.
New application 1: laptop computer shell laser drawing
The current market growth of notebook computers is very fast, the competition is fierce, and new processing technologies are constantly emerging. Among them, laser drawing of notebook casing is the representative of its latest processing technology.
New application 1: laptop computer shell laser drawing
Through the laser wire drawing process, it not only ensures the firmness of the notebook case, but also discharges the heat in time. The processing is fine, beautiful and fashionable, and the humanization and business entertainment theme are well combined, adding a sense of texture and a noble.
The Huagong laser LSD12E large-format laser marking machine is used to draw the notebook computer casing, the speed can reach 1600mm/s, and the maximum speed can reach 10000mm/s. The 14-inch notebook panel is intricately carved and filled with graphics to complete the engraving for about 7 minutes. Directly on the aluminum shell, magnesium alloy surface, stainless steel shell carved pattern: beautiful graphics, neat edges, is the best process to replace silk screen, knife engraving. After the engraving, the silver is electroplated, and the texture is oily.
New application two: CO2 galvanometer engraving machine alloy surface oxygen breaking
The dynamic agglomeration CO2 galvanometer engraving machine breaks oxygen on the surface of the magnesium alloy, and the notebook heat sink breaks oxygen, and the efficiency is high and does not ignite. The laser engraving precision is high, the filling method is reasonable, and the speed is fast.
New application 2: CO2 galvanometer engraving machine alloy surface oxygen breaking
New application three: keyboard light marking and plastic parts marking
The large-format full-page marking of the notebook keyboard eliminates multiple clamping and ensures the marking efficiency. The full-page marking time can be completed in about 15 seconds.
New application three: keyboard light marking and plastic parts marking
New application four: mobile phone button marking
New application four: mobile phone button marking
New application five: mobile phone insulation pad cutting
New application six: UV laser marking
Unlike infrared processing, UV microprocessing is not inherently heat treatment, and most materials absorb UV light more easily than infrared light. High-energy UV photons directly destroy the molecular bonds on the surface of many non-metallic materials. Parts processed with this "cold" photo-etching process have smooth edges and minimal carbonization. Moreover, the characteristics of the ultraviolet short wavelength itself are superior to the mechanical microprocessing of metals and polymers. It can be focused on points of sub-micron order, so that the processing of fine parts can be performed, even at low pulse energy levels, high energy density can be obtained, and material processing can be performed efficiently.
Ultraviolet lasers have three advantages over the engraving of materials by infrared and green lasers:
1. More types of materials have more absorption of UV lasers;
2. The ultraviolet photon energy is stronger, for example, the 1W ultraviolet laser is equivalent to 3W infrared laser energy;
3. Can focus on a smaller spot.
The 355nm UV laser has a short wavelength and a smaller focusing spot, which is cold-processed and has a small thermal influence. It is especially suitable for surface marking of objects such as glass and polymer materials, micro-hole processing (aperture d≤10μm), flexible PCB board, LCD, TFT marking, dicing and cutting.
New application seven: laser color marking
The laser color marking machine uses the latest optical technology and a unique water temperature control system to make the laser power stronger and the beam more stable. It has advantages in color and light-transfer buttons. Color marking is suitable for surface marking of various metals, molds, plastics, PVC ceramics and other objects.
New application eight: laser depth marking
Laser depth marking is still relatively rare, mainly used for blackening and deepening of bearings and crafts. Compared with traditional mechanical engraving, the laser depth marking effect is more refined, the stereoscopic effect is stronger and the speed is faster, which is a new surface treatment process with great market potential.
New application nine: narrow pulse width laser marking
Narrow pulse width lasers have their unique advantages in laser laser engraving: first, the pulse width is narrow, the pulse width is generally within 10 ns; second, the peak power is high, and the narrow pulse width makes it very easy to obtain a higher peak laser. power. Third, the volume is small. Compared with the traditional laser marking machine, the narrow pulse width laser can greatly reduce the volume of the laser, which greatly reduces the equipment integration and reduces the occupation of the production site. Fourth, the repetition frequency is adjustable, and the repetition frequency can be adjusted within a wider range of 10-100 KHz, which improves the application range of the product processing. Narrow pulse width lasers allow for finer beam quality for better fine marking.
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