Briefly introduce three commonly used stickers equipment
Self-adhesive label printing equipment is generally divided into three categories: flexo-based methods, more common in North American countries; flexo-based, embossed secondary methods, favored by European users; embossed as The primary and secondary methods are the first choice in the Asia-Pacific region. China's self-adhesive label printing industry: there are many small and medium-sized printing plants, and there are few specialized large-scale printing plants; there are many primary equipment and few high-end equipment in printing plants. The development of the sticker label printing market is uneven: coastal areas are developed, central regions are second, and inland regions are relatively backward. Regarding self-adhesive label printing, relief printing is the mainstay, continuous paper feeding is the most advanced printing form, reciprocating is next, and intermittent paper feeding is the first and lowest precision paper feeding method. Sheet-fed sticker printing is a unique processing method in China. It is rare in foreign countries. The level of domestic sticker printing is only at the preliminary stage, which is far from the advanced level in the world. Not only in printing equipment, but also in the printing process, printing materials and label design.
1. Topographic sticker printing equipment
There are two main equipment manufacturers producing letterpress round and round self-adhesive label printing equipment-Ko-Pack in Japan and Shanghai Xinmin Taiyang, a wholly-owned Japanese company in China. The products are all satellite-type continuous paper-feeding presses, which are configured for 6-color UV relief printing and a set of UV glazing; optional round die cutting, flat die cutting, corona treatment, sheet cutting and sheet receiving devices. In order to ensure the accuracy of UV coating, Ko-Pack and Xinmin Sun both changed the traditional roller coating to flexographic coating. The amount of varnish coating is determined by the number of lines of the anilox roller, and is not affected by the pressure and printing speed, ensuring the consistency of the gloss of the printed product.
Flat press intermittent feeding label printing equipment is also a common equipment for label printing. The main manufacturers are Taiwan Wanji and Ruian Zhongtian. The main transmission mechanism of the equipment is changed from the traditional mechanical transmission to the electromechanical integrated shaftless transmission. The paper feeding length can be preset by the computer, and the roller automatically pulls the material to convey the paper, completely eliminating mechanical errors. Another significant change is the installation of UV drying devices, the use of UV inks, which expands the range of label printing, increases the printing speed, and eliminates the laminating process.
2. Flexographic label printing equipment
All such devices are narrow-width flexo printing machines, mainly domestic products, such as Shanghai Ziguang, Xi'an Black Bull, Wuxi Baonan, etc. The device has two characteristics:
â‘ Using UV ink instead of water-based ink, UV ink has good stability, avoid frequent cleaning of printing plate and ink transfer system. More importantly, the color density of UV ink is greater than that of water-based ink, which can improve the printing quality of labels.
â‘¡Using film-free direct laser plate-making technology is generally used, which avoids the loss of small dots and the gradation of large dots, improves the image hierarchy, and sharply improves the clarity of graphics and printing quality.
Flexographic printing stickers are the future development direction. At present, domestic companies using domestic resources and foreign technology to produce flexographic printing equipment are gradually accepted by domestic printing companies in terms of printing quality and price. The market share of dry label is growing rapidly.
3. Die cutting equipment
There are two printing methods for self-adhesive labels: one-step printing and die cutting are completed at one time, the machine inputs raw materials at one end and the finished labels at the other end, which is suitable for simple label production. Step-by-step, that is, label printing and die-cutting are performed on two devices, suitable for label production with complex graphics, multiple processes, and large batches; step-by-step processing can reduce costs, reduce waste, and improve efficiency. [next]
â‘ Roll paper round die cutting machine
The off-line die-cutting machine can not only process the printed label roll material, but also directly die-cut blank labels and folds or cut sheets, with high efficiency and precision.
â‘¡Single paper flat die cutting machine
Self-adhesive labels printed on a single sheet of paper currently account for 10% of all label production in China. All of these products are die-cut on a flat die-cutting manual die-cutting machine. They are not suitable for self-adhesive materials. They have high labor intensity, low production efficiency, and poor die-cutting quality.
As a large label production country, China is also the country with the greatest potential for sticker label printing. In the future, self-adhesive label printing will develop in many ways. Label printing plants with various business scopes and processing types have their own development space. The future market for self-adhesive label printing equipment will be very prosperous. New equipment will gradually replace old equipment, and printing technologies and processes will coexist in various forms.
1. Flexographic printing equipment
In particular, the number of UV flexographic printing equipment in the field of self-adhesive label printing will increase rapidly, and the market share and quality level of domestic equipment will also be greatly improved. The main reason is the rapid development of plate-making technology, more complete supporting services in the flexo market, and more standardized label printing market.
2. Circular pressure and rotary embossing equipment
At present, all rotary presses are occupied by imported equipment, including Ko-Pack in Japan, Labelman in Taiwan, China, and the mainland is basically blank (a few prototypes have been produced by Taihang Press). As long as the quality of domestic equipment is stable, such equipment will quickly occupy the domestic market.
3. Semi-rotary embossing equipment for round and round reciprocating paper feeding
As the most popular equipment in the sticker label printing industry, it will develop rapidly. The price is moderate and the printing quality is stable, suitable for different types of orders (large batch, small batch and temporary proofing). But the disadvantage is that the speed is slow, there are certain requirements for the quality of raw materials, and there are overprint defects.
4. Circular flattening relief printing equipment
It used to be the main equipment for self-adhesive label printing, but such equipment has two major defects: inaccurate overprint, reciprocating impression cylinder, which is easy to cause label overprint errors; low efficiency, the machine vibrates violently during high-speed operation, and it cannot be produced normally , Will be phased out.
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