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Flexo Multi-process Connection And Digital Flexo
- May 28, 2018 -

At present, the label market is increasingly demanding for printing technology. Customers often require the label to be eye-catching, have a strong visual impact, and have a subtle representation of the color in the local details of the image. The pattern must have a three-dimensional effect. At the same time, it can produce higher added value and better anti-counterfeiting effect.

Traditional label printing equipment generally can only install one or two other printing units or finishing processing units. When additional printing and finishing processes need to be added, the printing factory can only transfer to other printing equipment. Some even take the factory to help other families do, which will undoubtedly increase the printing cost of the label, and cause a waste of time and bring a lot of inconvenience.

Obviously, a label printing device that only has a single printing method cannot meet the high-value-added printing and processing requirements of label products at present, nor can it meet the needs of printing companies for cost reduction and efficiency increase, and multi-process flexo printing technology and The development of digital flexo printing has solved the above problems.

Flexo Printing Technology Development Overview

As a type of embossing method, flexo printing has seriously hindered the promotion of the printing method due to factors such as the adverse effect on human health caused by the use of aniline ink in the early days of its birth. However, with the advancement of science and technology, the ink process has been improved, and this printing method has first achieved considerable development in the United States. At the end of the 20th century, flexographic technology entered China. Since then, flexographic technology has developed rapidly from small to large in China.

In recent years, as the country's emphasis on environmental protection has become higher and higher, flexo printing has met the national green printing requirements due to the use of water-based inks and UV inks, and its market share in the field of label printing continues to increase. In particular, after brands such as Unilever, Procter & Gamble and other well-known Japanese brands and some pharmaceutical companies have asked for the need to use flexographic printing to print labels, more and more label printers have embarked on a "concave flex" and "convex rotation". "Soft" "rubbing soft" road.

According to the arrangement of printing units, flexible printing equipment can be divided into three types: satellite type, stacked type and unit type. According to the printing format, it can be divided into wide width machine, medium width machine and narrow width machine. The flexo printing equipment normally used for label printing is mainly a narrow-width unit type flexo printing machine.

The difference between flexo printing and other printing methods is that it uses a relatively soft polymer resin plate. Currently, the number of screens for flexo printing can easily reach 175 lines/inch, which is sufficient for general packaging and label printing; The anilox roller is used. The anilox roller is both the ink transfer roller and the ink metering roller. It can realize the same short ink path as the gravure printing and can accurately supply the ink according to the process requirements. The third is zero pressure printing, which can reduce The mechanical vibration and damage reduce the wear of the printing plate, and at the same time it expands the range of printing media, especially for the printing of flexible materials; Fourth, it is a powerful connection function, narrow-width unit type flexographic printing equipment In addition to the printing function, it can also be used to complete hot stamping, embossing, embossing, die cutting (rewinding), etc. Printing and postpress processing can be completed once, which can not only improve the production efficiency, but also significantly reduce the cost of printing. The convenient, flexible assembly function of the narrow-width unit type flexo printing equipment is unmatched by other printing methods.

Flexible printing equipment and process connections are different

With the rapid development of flexographic technology and finishing and molding technology, multi-process line narrow-width unit flexo printing equipment is also constantly updated. At present, there are many types of label flexographic printing equipment on the market, and there are various advantages in the connection of multiple processes. In addition to flexographic presses from imported brands such as Gallas, Ma Andy, Omet, and Kidu, a variety of process units and devices can be flexibly selected according to customer needs. The domestically produced narrow-width unit flexo printing equipment has also been rising in recent years. Can be flexible to achieve a variety of connection printing processing needs.

Suntech Machinery Co., Ltd. STF-340 flexographic printing machine can be online cold foil and screen printing and other functional modules, and each unit can be arbitrarily moved through the device guide, according to the actual needs of customers to increase or decrease the number of units or adjust the position before and after. For example, it is possible to mix offset printing color groups between flexo printing groups to solve special processes such as microfabrics, and to print anti-counterfeiting labels and other products; to add punching technology to the post-doping unit for printing boarding passes, Chips, signs, etc.; can be added after the printing unit to print mechanical numbers, etc., for printing all kinds of tickets; digital printing system can be grafted on the upper slide platform, so that the traditional flexible and common rail printing and digital printing common rail , no longer troubled by the color sequence, used to print all types of security labels and variable information labels.

Zhejiang Weigang Machinery Co., Ltd. ZJR-330 flexographic printing press not only uses the gas-expanding sleeve version of the roller, the change operation is quick, convenient and simple; the printing roller is equipped with a water-cooled device, and the printed film labels are not cured by UV. The resulting high temperature impact; and the design of a movable cold press unit, mobile flip frame and three die cutting stations, to meet the different product needs, the flexibility greatly improved.

Digital flexo development can be expected

With the trend of personalized development in the consumer market becoming more and more obvious (such as the application of two-dimensional codes) and the continuous advancement of digital printing technology itself, the market for digital printing has been continuously expanding, especially with traditional printing, especially flexo printing. Combinations are becoming more and more common. The flexo printing line equipped with inkjet digital printing system is widely used in the fields of color box, high-speed rail tickets, tickets, medical labels, food labels, lubricant labels, and anti-counterfeiting labels. Combining increasingly sophisticated digital printing technology with flexo printing technology is becoming a new trend in the label printing industry.

However, the “digital flexo printing” we talked about here does not refer to the installation of digital printing units on flexographic printing presses. Instead, it refers to the “digital” control of the operation flow of flexographic printing presses through the improvement of the functions of flexographic printing presses. The flexographic press can achieve the effectiveness of digital presses in terms of operability and market response, especially in the "short-run" business where the two intersect, demonstrating the competitive advantages of flexographic presses in terms of cost and efficiency. .

The Kidu M3 flexo press released by the Kidu company is a good example of the advantages of digital flexo printing. Each unit of the device is equipped with a high-definition digital camera, plus seven servo motors, which can continuously monitor the printing pressure and overprint of each printing unit. At the same time, by checking the size and position of the outlets to determine the size of the printing pressure and overprinting conditions. Once any detected value is different from the standard PDF file, the digital camera will immediately “notify” the servo motor to immediately adjust the printing pressure and overprint to ensure the most Good "digital" quality.

In short, compared to other printing methods now facing increasingly stringent environmental protection policies, flexographic equipment is developing well whether it is a wide-width machine or a narrow-width machine. In the future, multi-process flexo and digital flexo will develop at a more significant pace.

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