Since the outbreak of the epidemic, masks have become a necessity of life at this stage. However, the huge demand gap has made some unscrupulous traders take advantage of it, a large number of inferior masks have entered the market, and entries related to fake mask fraud have repeatedly appeared on the hot search. Fake masks not only have no protective effect, but also have the risk of contamination due to substandard production environment hygiene, which is extremely harmful to personal health. To identify real and fake masks, the most direct way is to check the laser anti-counterfeiting marks. Mask laser marking machine solves this problem very well

      For boxed 3M N95/KN95 series masks, it can be identified by the anti-counterfeiting label on the mask box. The labels of real masks will change color from different angles, while the labels of fake masks will not change color. For bulk 3M N95/KN95 series masks, the authenticity can be identified by observing the fonts on the masks. The real 3M mask characters are all marked by the mask laser marking machine, and the fonts have diagonal lines, while the fake ones are printed with ink and have dots (traces of uneven ink).

      In fact, the anti-counterfeiting technology of mask laser marking machine can not only be used to identify the authenticity of masks, but also plays a huge role in packaging anti-counterfeiting and traceability in the fields of food, medicine, tobacco, beauty, and electronic products. It can be said that laser Anti-counterfeiting marking 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 over traditional methods?

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

      The basic principle of laser marking is to use a laser beam with high energy density to act on the surface of the material, to instantly vaporize or change the color of the surface material by focusing, and to form the required permanent image by controlling the path of the laser on the surface of the material. Text mark. Since laser marking can print various characters, symbols and patterns, the size of the characters can be from millimeters to micrometers, which has special significance for the anti-counterfeiting of products, so it is widely used in the anti-counterfeiting market.

      Before the large-scale application of laser marking, the marking on packaging was usually printed with ink. The marks printed by this traditional method tend to peel off over time, become blurred, easily tampered with, and cannot be used with high precision. Although it has advantages in equipment cost, the continuous cost of consumables (ink) is high, and it will cause some pollution to the environment.

      Taking the most common food packaging as an example, because the marks printed by traditional methods are easy to erase and fall off, some criminals will print some expired or even counterfeit products with brand trademarks, or modify the production date to make these substandard products. circulated in the city. Such phenomena are common in the fields of grain and oil, beverages, snacks, sauces and so on. In addition, for some paper food packaging, the harmful substances of ink may penetrate the packaging and contaminate the food, posing a threat to the health of consumers.

      Beverage bottle caps, food packaging marking:

      The emergence of laser technology has solved a series of problems brought 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 query the detailed information of the factory and circulation of food 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, it is related to the life and health of the people, so the prevention of counterfeiting and anti-counterfeiting of medical products has become the top priority of protecting the health and safety of consumers.

      Medicine, metal surface marking:

      In addition to some of the characteristics mentioned above, the marking of medical devices and drugs also has some special requirements. For example, for common pills and soft capsules, if lithographic printing is used, the product will be stressed, while non-contact laser marking will not deform the capsule, and can mark smaller information on tiny pills. On medical devices such as stainless steel surgical and dental equipment, the laser can mark absolutely smooth surfaces, which prevents bacteria from adhering to the surface, and the marked surface does not damage the corrosion-resistant chemical passivation treatment , allowing the anti-corrosion coating to persist even after years of use and countless cleanings and sterilizations. Another example is the 3M mask mentioned at the beginning, whether there is a laser mark is an important sign to distinguish the authenticity.

High clarity and anti-counterfeiting of laser marking machine

      Laser marking is also different: unique advantages of UV lasers for food, medical applications

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

      In fact, CO2 and fiber lasers have long been developed for marking applications. The light emitted by these lasers is in the infrared range, and the essence of the marking process is to heat the material to bleach, carbonize, or ablate through thermal interaction to create color contrast, but this heating changes the heat affected zone (HAZ) of the material. Chemical structure, carbonization occurs or the surface is not smooth. For plastics commonly used in food packaging, due to its low absorption rate of infrared light, the heat generated by infrared lasers can damage the surface of some packaging materials, so it cannot be used in the food packaging industry on a large scale.

      In this context, the advantages of UV lasers emerge. Most materials absorb UV light more strongly than infrared light, and UV lasers have higher photon energies. When the ultraviolet laser acts on high molecular polymers such as PI, it can directly break the chemical bonds 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 is converted to heat, essentially eliminating changes in the heat-affected zone (HAZ) and surrounding materials. For most white plastics (the pigment is TiO2), TiO2 strongly absorbs UV light and undergoes a change in crystal structure. This change darkens the material in the corresponding area, resulting in smooth, legible marks inside the material.

      2. Characteristics of UV Lasers

      Full water-cooled constant temperature design, high-precision chiller, can work stably for a long time within 35° of room temperature;

      Built-in collimation and beam expansion optical path, convenient for customer integration;

      Innovative laser frequency doubling design, good laser output stability, small fluctuation (<2%), good beam quality (M2<1.3);

      Modular control system, easy to use, easy to maintain, and low cost for later use;

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

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

      1. Introduction to the performance of the whole machine

      UV laser marking machine consists of software control system, computer control system, optical system, workbench, etc.

      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 instruction 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 laser light, so as to precisely etch the content to be marked on the surface of the processed object . The control system has a full Chinese interface, compatible with files output by AUTOCAD, CORELDRAW, PHOTOSHOP and other software, and can be used for barcode, QR code, graphic text and other marking, and supports PLT, PCX, DXF, BMP, AI and other file formats, directly Using SHX and TTF fonts, it can automatically encode and print serial numbers, batch numbers, dates, etc.

      ③ Optical system: The optical system includes components such as laser, galvanometer scanning system and focusing lens. The laser beam output by the laser is irradiated on a group of reflective mirrors of the galvanometer scanning system, and the two deflectable mirrors are respectively clamped on two precision galvanometer motors (high-speed galvanometers). When the driving action occurs, the two reflective mirrors are driven to rotate, so as to realize the deflection of the laser beam. The deflected laser beam irradiates different positions on the object to be processed, and forms a preset figure 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 ensures the long-term and stable operation of the optical system.

      ⑤ Features of the whole machine: compact appearance and small volume.

      3. Working environment requirements

      The ambient temperature is required to be between 10-35°C, and other requirements are to install air conditioners.

      The humidity requirement is 40%-80%. No condensation, a dehumidifier should be installed.

      Power supply grid requirements: 220V; 50Hz

      Power supply grid fluctuation: ±5%, grid ground wire meets international requirements. In areas where the voltage amplitude is more than 5%, electronic automatic voltage stabilization and current stabilization devices should be installed.

      There should be no strong electromagnetic signal interference near the installation equipment. Avoid radio transmitting stations (or repeater 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 is required to be smoke-free and dust-free, and avoid a working environment with serious dust such as metal polishing and grinding.

      Air pressure: 86-106kpa.

      In some environments, anti-static floors should be installed, and shielding should be strengthened.

      4. Industry application

      Mask laser marking, high-end electronic product appearance LOGO marking, food, PVC pipe, pharmaceutical packaging materials (HDPE, PO, PP, etc.) marking, micro-hole drilling, aperture d≤10μm, flexible PCB board marking, scribing, etc.