Laser marking machine mask anti-counterfeiting mark

Since the outbreak of the epidemic, masks have become a daily necessity at this stage. However, the huge demand gap has caused some illegal vendors to take advantage of it, and a large number of low-quality masks have flowed into the market, and entries related to fake mask fraud have repeatedly appeared in hot searches. Fake masks not only have no protective effect, but also have the risk of contamination due to substandard production environmental hygiene, which is extremely harmful to personal health. The most direct way to identify genuine and fake masks is to check the laser anti-counterfeiting marks. The mask laser marking machine solves this problem very well

3M mask text is marked by a mask laser marking machine

For boxed 3M N95/KN95 series masks, it can be identified by the anti-counterfeiting label on the mask box. The label of the real mask will change color from different angles, while the label of the fake mask will not change color. For bulk 3M N95/KN95 series masks, the authenticity can be distinguished by observing the font on the mask. The real 3M mask text is printed by a mask laser marking machine, and the font has diagonal lines, while the fake is printed by ink with dots (marks of uneven ink).

Anti-counterfeiting technology of laser marking machine

In fact, the anti-counterfeiting technology of mask laser marking machine can not only be used to identify the authenticity of masks. The technology also plays a huge role in anti-counterfeiting and traceability of packaging in the fields of food, medicine, tobacco, beauty, and electronic products. It can be said that laser Marking anti-counterfeiting has been integrated into all aspects of our lives. So why can laser marking play such a huge role in the packaging anti-counterfeiting market? What advantages does it have compared to traditional methods?

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Why laser: Features and application advantages of laser marking anti-counterfeiting:

The basic principle of laser marking is to use high-energy-density laser beams to act on the surface of the material. By focusing, the surface material is instantly vaporized or changed in color, and the path of the laser on the surface of the material can be controlled to form the required permanent image. Text mark. Because laser marking can produce various characters, symbols and patterns, and the size of characters can range from millimeters to micrometers, this has special significance for the anti-counterfeiting of products, so it has a wide range of applications in the anti-counterfeiting market.

No pollution in UV laser marking

Before the large-scale application of laser marking, the marking on the package was usually printed with ink. The marks printed by this traditional method are easy to fall off and blur over time, are easy to be tampered with, and cannot perform high-precision operations. Although it has advantages in equipment cost, the continuous cost of consumables (ink) is high, and it will cause certain pollution to the environment. Take the most common food packaging as an example. Because the marks printed by traditional methods are easy to erase and fall off, some criminals print some expired or even fake products with brand trademarks, or modify the production date to make these unqualified products Circulate in the city. This kind of phenomenon is widespread in grain and oil, beverages, snacks, sauces and other fields. In addition, for some paper food packaging, harmful substances in ink may also permeate the packaging and contaminate the food, posing a threat to the health of consumers.

Nanosecond UV laser marking beverage bottle caps, food:

The emergence of laser technology has solved a series of problems caused by traditional ink printing. For food packaging, the use of laser marking has the advantages of non-toxic, non-polluting, high efficiency, high definition, exquisite patterns, and never falling off. In addition, laser marking can also be combined with computer technology, and by linking to the database system, we can track and inquire detailed information of food delivery and circulation in time to ensure that we can eat with confidence. The medical industry is inseparable from the escort of laser marking. Since medical products are in direct contact with the human body and are related to the lives and health of the people, the anti-counterfeiting and anti-counterfeiting of medical products has become the top priority of protecting the health and safety of consumers.

UV laser source for marking pharmaceuticals and metal surfaces:

In addition to the features mentioned above, the marking of medical devices and drugs also has some special requirements. For example, for common pills and soft capsules, lithographic printing will produce pressure on the product, while non-contact laser marking will not deform the capsule, and can mark even more minute information on tiny pills. On the medical equipment represented by stainless steel surgery and dental equipment, the laser can mark on an absolutely smooth surface, which can prevent bacteria from adhering to the surface, and the marked surface will not damage the corrosion-resistant chemical passivation treatment , Can make the anti-corrosion coating exist even after years of use and countless times of cleaning and disinfection. Another example is the 3M mask mentioned at the beginning. Whether there is a laser mark is an important sign to distinguish between authenticity and fake.

Laser marking is also different: the unique advantages of UV lasers in food and medical applications

As we all know, there are many types of lasers, and their applicable materials are also different. For example, fiber lasers are suitable for all kinds of metal materials, CO2 lasers are suitable for most polymer materials, and ultraviolet lasers are suitable for more precise and demanding application scenarios.

In this context, the advantages of UV lasers have emerged. Most materials absorb ultraviolet light stronger than infrared light, and the photon energy of ultraviolet lasers is higher. When the ultraviolet laser acts on high molecular polymers such as PI, it can directly break the chemical bond of the material, so that the material fragments are discharged in the form of small particles or gas, so as to achieve the purpose of stripping and removing the material. Since most of the energy is used to break chemical bonds, very little energy is converted into heat energy, which basically eliminates the changes in the heat affected zone (HAZ) and surrounding materials. For most white plastics (the pigment is TiO2), TiO2 will strongly absorb ultraviolet rays and change the crystal structure. This change makes the substance in the corresponding area appear darker, resulting in a smooth, clear and legible mark inside the material.

2. Characteristics of UV laser Fully water-cooled constant temperature design, high-precision water chiller, can work stably for a long time at room temperature within 35°;

Built-in collimation and beam expansion outer optical path, convenient for customer integration; Innovative laser frequency doubling design, good laser output stability, small fluctuations (<2%), and good beam quality (M2<1.3);

Modular control system, simple to use, convenient to maintain, and low cost in later use;

Excellent product stability design can ensure long-term stable operation of the laser in harsh environments;

The optical components are made of international manufacturers' accessories, and the quality is guaranteed.

1. Introduction to the performance of the whole machine The UV laser marking machine is composed of a software control system, a computer control system, an optical system, and a workbench.    ①Control system: The control system controls the operation of the entire equipment, including the power supply and control of the optical system components, the cooling system, and the control and instructions of the alarm system. ②Computer control system: The computer control system includes a computer and a digital galvanometer card, which drives the optical system components to act according to the parameters set by the marking control software, and emits pulsed lasers, so that the content to be marked can be accurately etched on the surface of the processed object . The control system has a full Chinese interface, compatible with files output by various software such as AUTOCAD, CORELDRAW, PHOTOSHOP, etc. It can be used for marking barcodes, QR codes, graphic texts, etc., and supports PLT, PCX, DXF, BMP, AI and other file formats, directly Use SHX, TTF font library, can automatically encode, print serial number, batch number, date, etc. ③ Optical system: The optical system includes parts such as laser, galvanometer scanning system and focusing lens. The laser beam output by the laser irradiates a set of reflective mirrors of the galvanometer scanning system. The two deflectable mirrors are clamped on two precision galvanometer motors (high-speed galvanometers). When the galvanometer is affected by the computer voltage signal When the driving action occurs, the two reflecting mirrors are driven to rotate, thereby realizing the deflection of the laser beam. The deflected laser beam irradiates different positions on the object to be processed, forming a preset pattern or text on the surface of the object. The key components of the optical system are imported high-quality brand products, with high precision, fast speed and stable performance, which can meet the requirements of long-term continuous work. ④ Cooling system: The cooling system of the laser marking machine adopts a high-precision water cooling method, and the cooling system guarantees the long-term and stable operation of the optical system. ⑤ Features of the whole machine: compact appearance and small size.
2.  Working environment requirements The ambient temperature is required to be between 10-35℃, and other requirements are to be equipped with air conditioners. The humidity requirement is 40%-80%. No condensation, a dehumidifier should be installed. Power supply grid requirements: 220V; 50Hz Fluctuation of the power supply grid: ±5%, and the ground wire of the grid meets international requirements. In areas where the voltage amplitude is more than 5%, electronic automatic voltage stabilizing and current stabilizing devices should be installed. There should be no strong electromagnetic signal interference near the installation equipment. Avoid radio transmitting stations (or relay stations) around the installation site. Foundation amplitude: less than 50um; vibration acceleration: less than 0.05g. Avoid a large number of punching and other machine tools nearby. The equipment space requirements must be smoke-free and dust-free, and avoid working environments with serious dust such as metal polishing and grinding. Air pressure: 86-106kpa. In some environments, anti-static floor should be installed and shielding should be strengthened.
3.  Industry application Laser marking of masks, LOGO marking on the appearance of high-end electronic products, marking of food, PVC pipes, medical packaging materials (HDPE, PO, PP, etc.), micro-holes, diameter d≤10μm, marking of flexible PCB boards, dicing, etc.