Laser marking technology has led domestic companies to enter the laser processing industry. Especially after the widespread use of fiber lasers in laser equipment , the laser marking industry has also reached the " peak " of the market, but laser marking applications have seen common lasers for many years. The marking patterns are all black and white.
In the current laser marking process, only a part of the fiber laser can be used to achieve color marking on the stainless steel.
Koi side laser - stainless steel color marking
In order to mark such visual effects, in addition to inkjet and lacquer, it is also possible to use a laser that is independently adjustable in pulse width and frequency, the technology of MOPA pulsed fiber laser.
When the laser marks the stainless steel material, the laser beam can be adjusted to change the color change of the surface layer of the material, thereby obtaining a decorative effect with different colors.
The advantage is that its pulse width and frequency are independently adjustable, and adjusting one of them does not affect other laser parameters, which is not available in Q-switched lasers. This feature gives the stainless steel color marking an infinite variety of possibilities. In the actual marking operation, the pulse width, frequency, power, speed, filling mode, filling pitch, delay parameters and other factors will affect the color effect.
However, because the technology is not very mature or has suffered a lot of limitations, the price is also unacceptable to most manufacturers. Because a color Laser Marking Machine can buy several laser marking machines.
Laser color marking new technology
Recently, a certain laminate group has been developed in Germany, the laminate group comprising an outer laminate and an inner laminate, wherein the outer laminate comprises a transparent polymer carrier, which is contained on one side of the carrier in the infrared The region's absorption of the maximum color of the infrared dye color laser markable layer, this laminate can be used for almost all common marking materials, this technical advantage is different from the ordinary laser paper on the market.
A composition which can be used for laser color marking and a preparation method therefor also appear in Japan. The composition components include: 100 parts by weight of the polymer; the content of the laser marking powder is 0.05622 parts by weight; and the content of the temperature sensitive substance is 0.16210 parts by weight. The preparation method comprises: melt blending the components including the polymer, the laser marking powder, and the temperature sensitive substance according to the group distribution ratio. The invention adds a temperature sensitive substance and uses the heat generated in the laser marking process to cause the temperature sensitive substance to undergo thermal decomposition, oxidation and the like at a certain temperature, and these reactions destroy the original material structure or generate a new substance. At the same time, a new color is produced. This color change is unidirectional, irreversible, and the primary color cannot be restored after cooling, so that a stable permanent mark can be formed on the product.
Shenzhen Jinyifang Laser Company is working on laser color marking process. It is believed that the future laser color marking pattern will be more complicated and diverse. The exquisite decorative effect will give laser marking a wider application space and become a major trend in laser processing applications. .
