Laser marking machine is becoming more and more common in life, such as beverage bottles, animal ear tags, two-dimensional code marking of auto parts, 3C electronic marking and so on. The most common marking is black, but what many people don’t know is that lasers can also mark color patterns.
As far as the current laser marking technology is concerned, only some fiber lasers can be used to achieve color marking on stainless steel. To mark such a visual effect, in addition to inkjet and color paint, you can also use the technology of MOPA pulsed fiber laser source, a laser whose pulse width and frequency are independently adjustable.
Under the action of the laser heat source, the stainless steel material generates colored oxides on the surface, or a colorless and transparent oxide film, which exhibits various colors due to the light film interference effect. This is the basic principle of stainless steel color marking, simple In other words, under the action of the laser, the surface of the stainless steel produces a laser thermal effect. The laser energy is different, and the surface of the stainless steel also shows different colors.
Its advantage is that its pulse width and frequency are independently adjustable, and adjusting one of them will not affect other laser parameters, which is not available in Q-switched laser source. And this feature brings unlimited possibilities for stainless steel color marking. In the actual marking operation, the pulse width, frequency, power, speed, filling method, filling interval, delay parameters and other factors will affect the color effect.
Traditional stainless steel color preparation methods such as chemical coloring and electrochemical coloring used in the past have high energy consumption, high pollution and difficult to achieve fine coloring. In contrast, stainless steel laser color marking has unique advantages.
1. Laser marking is environmentally friendly and pollution-free;
2. The marking speed is fast, and the marking pattern can be kept permanently;
3. Laser marking machine can edit various text patterns at will, which is convenient and easy to operate.
Laser color marking makes the presentation effect of the pattern more diversified. The marked object bids farewell to the monochromatic color, the color hierarchy is enhanced, the image is lifelike, and the product quality is improved. It is an innovation to the traditional craftsmanship. Since then, the scope of application of laser color marking has continued to expand, and it has also become a new technological means to enhance the added value of products.
Post time: Sep-15-2021
