Satellite flexo printing machine, also known as Central Impression or Central Impression Roller Flexo Printing Machine, is the most important type of flexo printing machine. According to information, in Europe and the United States, satellite flexo printing machines account for 70 to 80% of all flexo printing machines. In China, flexo printing technology is getting more and more widely used. Satellite flexo printing machine will become a major model in the application field of flexo printing machine in China. In addition, some printing machine manufacturers in China have begun to develop such equipment. therefore. Understanding the current status of its latest technology development is of great significance for the introduction of equipment and research and development. Satellite flexo printing machine has many advantages: its control system is relatively simple, the investment is low; the overprinting precision is high, the production efficiency is high; the production line runs stably and reliably, and the adaptable range is wide. Satellite flexo printing machine is mainly used in the fields of flexible packaging, carton, label and corrugated box pre-printing. Generally speaking, the components of a satellite flexo printing machine include: unwinding and input section, printing section, drying section (inter-color drying and final drying), cooling section, output and rewinding section or in-line processing section and main drive And control parts. The technical level of the satellite flexo printing machine can be more accurately expressed by the following performance systems: maximum printing color number and printing arrangement, printing materials and printing width, printing image and text repeat length range, drying method, printing speed, suitable printing materials, The type of ink, but it is the control and automation system that reflects the technical level of the flexo printing machine. Although the flexo printing machine uses a variety of control and automation systems. But it can be roughly divided into semi-automatic type and fully automatic type. The following is a brief introduction to the new structure and advanced technology of satellite flexo printing machine: Sleeve type plate cylinder and anilox roller. Both the plate cylinder and the anilox roller are of integral type and sleeve type. The overall structure is simple, good rigidity, wide range of adaptation, but replacement is complicated. The sleeve type is easy to replace, but the structure is complicated, and each component is equipped with a pneumatic quick clamping and releasing device. Due to the low cost of sleeve-type plate cylinders, easy loading and unloading, high flexibility, long service life, convenient storage, high system accuracy, and rapid plate change function, it is now widely used in flexo and gravure printing, and will be gradually replaced Traditional printing plate. The sleeve-type plate cylinder (or sleeve-type anilox roller) is composed of a mandrel, an air support roller (empty cylinder) and a sleeve. When replacing the plate cylinder (or anilox roller), as long as the air pressure switch on the printing unit is turned on, compressed air is input to the inflation roller, and it is evenly discharged from the small hole of the inflation roller to form an air cushion to expand the sleeve inner diameter. Expansion, the original plate cylinder (or anilox roller) sleeve used will automatically pop up, replace the new plate cylinder (or anilox roller) sleeve, the new sleeve can easily and conveniently slide on the inflation roller To the requested location. Turn off the air pressure switch, the plate cylinder and anilox roller will be fixed. When the compressed air is cut off, the sleeve will shrink immediately and be tightly integrated with the inflation roller. The inner diameter of the sleeve is generally smaller than the outer diameter of the air support roller to ensure its meshing. Two or more sleeves can also be installed on the same inflation roller. If you need to replace or remove the sleeve, just inflate the inflation roller again. The sleeve circumference and diameter of the plate cylinder (or anilox roller) of the new satellite flexo printing machine can be changed, while the size of the mandrel is unchanged. The biggest advantage of the sleeve-type printing plate cylinder is that it can be reused, and it can stick a photosensitive resin plate on the sleeve at any time. In addition, the sleeve can also be used for laser engraving, using seamless flexo, printing continuous patterns or the same background color pattern. If the permissible range of the printing circumference of the sleeve system is 150mm, it means that the inner diameter of the sleeve with the printing circumference of 350-500mm is the same, and only one inflation roller is needed. By changing the sleeve wall thickness, the purpose of changing the sleeve circumference can be achieved. Gearless direct drive technology The rotation of the plate cylinder and anilox roller of the old-fashioned flexo printing machine drives the plate cylinder gear through the impression cylinder gear, and the plate cylinder gear drives the anilox roller gear to form a synchronous rotation. The repeat length of the printed matter depends on the plate cylinder and the gear of the plate cylinder, and the gear is limited by the pitch and modulus. Therefore, the repeat circumference of the printed matter is the same as the pitch of the gear. The rotation of the anilox roller of the new flexo printing machine is directly driven by the plate cylinder, which solves the problem that the repeated length of the printed products of the flexo printing machine is limited by the gear pitch. Each printing unit of the satellite gearless flexo printing machine is driven by 7 motors, of which 4 motors drive the front and back movement of the plate cylinder and anilox roller, and 1 motor controls the longitudinal registration and rotation of the plate cylinder, 1 One motor controls the horizontal registration of the plate cylinder and the horizontal movement of the plate cylinder, and one motor drives the rotation of the anilox roller. After the plate is installed, enter the circumference of the plate cylinder of the plate cylinder, which is controlled by PLC, so that the plate cylinder and the anilox roller reach the pre-printing and pre-registration position, which greatly reduces the printing pressure and printing registration time, and also saves Raw materials. At the same time, due to the use of gearless transmission, there is no need to replace gears when replacing printed products of different circumferences. The gearless satellite flexo printing machine takes only 1 minute to replace the flexographic cylinder and anilox roller on a unit, greatly reducing the time it takes to change the plate cylinder and anilox roller when replacing the product. The German EROMAC company's satellite flexographic printing machine automatic registration system uses a registration probe to control the registration of all printing units of the flexo printing machine, unlike the gravure printing machine that requires 6 sets of registration probes and auxiliary motors for seven-color printing. When the misregistration of printed products occurs, the registration probe directly drives the motor through the PLC to adjust the longitudinal and lateral registration positions of the plate cylinder. Unlike the longitudinal registration of the intaglio plate, the plate cylinder is adjusted by an auxiliary motor. The EROMAC automatic registration system is used to adjust the plate cylinder, which takes a short time to adjust and consumes less printing material. The system can automatically register according to the registration crosshairs, and can also perform registration according to the manual settings, so as to solve the error between the printing pattern and the overprinting crosshairs generated during plate making and paste-up. Closed double-scraper chamber type inking system Although the flexo printing machine adopts a two-roller type, a forward scraper type and a reverse scraper type structure can achieve quantitative ink supply, but because these types are all open ink supply, all are stored by the ink tank, and the ink roller Part of the ink is used for printing, and the excess part is returned to the ink tank. This open structure exposes the ink to a large area directly. If solvent-based ink is used, the solvent evaporates into the air, which will cause changes in ink characteristics and the environment. Pollution; If you use water-based ink, it is easy to produce bubbles, affecting the printing quality. Most of the satellite wide-format flexo printing machines use a fully enclosed double-squeegee inking system. The inking system consists of a blade holder, two blades, a side sealing plate made of wear-resistant soft material and an anilox roller. The flexographic ink is sprayed onto the surface of the anilox roller through the ink port and stored in the ink chamber. The ink is scraped by the reverse scraper, and the positive scraper plays a sealing role. According to the principle of fluid mechanics, the ink or cleaning agent is in a flowing state in the ink fountain. Therefore, even if a small amount of ink is injected, it can be recycled, and it can be quickly cleaned with a small amount of cleaning agent. Because of its good sealing, it has great benefits for hygiene and environmental protection. The closed double-scraper-cavity ink delivery system is composed of ceramic anilox roller, two scrapers, sealing strip, ink storage container, ink pump, ink delivery hose and other components. In the fully enclosed system, the scraper, seal, pad, and pressure plate are all mounted on a cavity bracket, and they are mechanically (or pneumatically or hydraulically) pushed to the ceramic anilox roller, and a certain pressure is applied. The ink delivery tube and the return tube are respectively connected to the ink pump and the ink storage container. The system has the following characteristics: the reverse scraper structure is used in the quantitative ink supply system, which is suitable for high-speed operation, avoids the problem of solvent evaporation and environmental pollution in solvent-based inks, and solves the foam problem that occurs during the use of water-based inks. The system can also be quickly docked with an automatic cleaning system to facilitate rapid cleaning to reduce ink replacement time and downtime. Quick roll changing device without stopping The pressure roller device and the belt breaking device work in a pneumatic manner, and adopt a pneumatic tension measuring and adjusting device to ensure a constant tension. The automatic paper receiving mechanism can still work normally even at the maximum paper roll diameter, thus ensuring the tension control at the highest printing speed. In order to ensure that the edge position of the printing material entering the printing part is always correct. For opaque materials such as paper, a correction device composed of a photoelectric scanning head or an ultrasonic sensor is also used. When printing paper or paper jams, sometimes temperature and humidity adjustments are required. When printing plastic film or aluminum foil. A corona treatment device should also be prepared to improve the inking ability of the film surface. Temperature-controlled impression cylinder and high-power drying / cooling system The impression cylinder of the satellite flexo printing machine adopts a double-wall structure. Conducive to the temperature control of the impression cylinder. The surface of the impression cylinder has a nickel-plated protective layer. The thickness of the nickel layer is about 0.3 mm. The impression cylinder is installed on the roller bearing to control the eccentricity error of the impression cylinder within 0.008 ～ 0.012mm. The impression cylinder is subject to dynamic balancing and static balancing. The impression cylinder is equipped with a water circulation system. In order to keep the temperature of the outer surface of the impression cylinder constant, to prevent the impression cylinder from thermal expansion. Some flexo printing machines also have an over-temperature protection function. When the temperature exceeds a certain maximum value, the power of the entire printing machine will be automatically cut off. Both the inter-color drying device and the bridge drying device between the printing color groups use double-loop circulating air to reduce the demand for fresh air, thereby reducing the consumption of heating energy. Modularized intelligent control management system There are roughly three types of control and management systems for satellite flexo printing machines: a rapid control system based on manual adjustment, an electronic information system based on automatic adjustment, and a digital control system based on fully automatic adjustment. The digital control system is driven by 7 stepping motors, and uses PC / PLC technology to manage and monitor the printing area, to achieve automatic registration in the axial and circumferential directions and to rotate the anilox roller at a low speed during shutdown. The printing press provides fault diagnosis. Modern satellite flexo printing machine mainly has the following control and management functions: ■Modular automatic operating system, which can pre-select menu, centralized operation unwinding / rewinding unit, printing unit, drying unit, and can also choose camera observation module to view the entire printing process on the display screen. ■Intelligent transmission system and positioning system ensure the accurate movement and horizontal registration of the printing plate cylinder and anilox roller of each color group. ■Electronic synchronous adjustment and computer-controlled fast-forward system, through stepper motor speed measurement, to ensure that the parameters such as printing pressure, printing length, printing plate and printing material thickness are set with high precision. Ensure that the equipment will not produce waste products when registering in the stop state, and realize the coordination between the printing unit and the anilox roller. ■Roller changing system of manipulator is used to automatically replace printing plate cylinder and anilox roller system. ■Ink supply and cleaning system, used to quantitatively supply ink to printing parts and automatically clean the anilox roller, cavity scraping system, ink pump and ink tube. The cleaning sequence is controlled by the computer, which greatly reduces labor intensity and significantly improves efficiency , Reducing downtime for renewal. ■Remote control system. Long-distance adjustment and control of printing pressure, tension control, horizontal and vertical automatic registration. Wooden Spatula,Oak Wood Kitchen Utensil,Oak Wooden Utensils,Kitchen Utensils With Oak Handle YangDong Q-Bamboo Houseware Co.,Limited , https://www.q-bamboo.com