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In recent years, the superiority of flexographic printing is being paid more and more attention. It is very popular in the field of packaging and printing. It adopts direct printing method, graphic color is bright, plate making speed is quick, printing cycle is short, mechanical structure is simple, Good adaptability to the material, film, paper, plastic, PE film and other materials are suitable for and high resistance to printing, printing more color, the use of ink for non-polluting water or alcohol ink, in line with environmental requirements, these Features for the commodity, especially food and medicine packaging printing has opened up a broad application prospects. One of the most prominent advantages of flexible printing is to form a linkage with other processes production line, the traditional printing process is printed on the offset printing machine after printing and then by other processes for a variety of post-processing, and flexographic printing machine can be in the The printing unit is equipped with a finishing machine for online operation, which can improve the production efficiency, reduce the cost and shorten the preparation time compared with the traditional process.
According to the relevant departments to calculate, because the flexographic printing presses running fast, simple operation, saving energy, and can make many processes completed once, the use of flexographic printing production costs than offset press, gravure machine much lower. Although the flexographic presses are particularly well suited to the packaging and printing industry with their advantages, these are all desirable from their overall concept, requiring a flexible printing press that is neither possible nor economical. Therefore, the economic and rational purchase of flexographic printing press is very important. In general, the purchase should pay attention to the following questions.
First, the model selection
The current flexographic printing press has been clearly divided into narrow and wide two categories, narrow and wide to 600mm around the sector. Narrow flexographic printing presses to print paper, cardboard-based, mostly for the unit type of printing presses; wide flexographic printing presses to print film, aluminum foil and other materials, mostly multi-satellite or stacked structure. The former main printing trademarks, folding cartons and other products, AlliedGear, Kang Ke, Mai Andy, Stevens and Webtron brands such as narrow-range flexographic printing presses are printed with post-processing function; the latter main printing all kinds of composite flexible packaging materials, Packaging bags, paper cups, etc., because in the field of composite flexible packaging printing, wide flexographic printing press has gradually replaced the gravure printing machine, flexographic printing machine printing color version has been difficult to distinguish with the gravure, and flexographic printing Of the cost (plate, production efficiency, equipment investment) is lower than the gravure, and environmental requirements are also better than gravure, the manufacturer mainly Seruudi, Bironi, W & H, F & K, Stevens, Wait. W & H company in the United States exhibited the new Soloflex satellite flexographic printing press, printing width of 620mm, can be printed 6 or 8 colors, very suitable for small quantities of print.
Second, the machine configuration options
In general, according to the need to select the model, there is a choice of machine configuration problems. In particular, the unit type flexo machine because of its follow-up processing unit configuration program a lot, should be selected according to actual needs, no need to all configuration. Such as hot stamping unit, polishing unit, punching punching unit, die-cutting unit and die-cutting drum, etc., if not need to be configured, so as not to cause unnecessary waste, unit-type flexo machine can be a variety of components Add configuration when needed.
Third, the textured Kun configuration
Flexographic printing press is a major feature of the use of anilox roller ink, ceramic anilox roller wear, corrosion resistance, long life, but the price is higher; metal anilox roll performance is slightly worse, but the price is low, middle and low Times the printed material can be used metal anilox roller; anilox roller mesh shape different also have different printing effect, this situation can be based on specific products to set; choose another basis of the anilox roller is the number of lines, different network cable print With a different anilox roller, the general number of print lines and the number of anilox roller network ratio of 1: 4 or so. In addition, the purchase of the machine should be noted that a machine can not have several units with a few anilox roller, the general number of units can be configured 2 times, such as a six unit flexo machine can be equipped with 10-15 mesh Roller, the number of these anilox roller to be different, so that when printed with different printed use.
Fourth, die-cutting drum configuration
Different prints to be equipped with different die-cutting drum, but different die-cutting drum die cutting quality and life is different. Die-cutting drum is mainly wrapped and the overall two, the overall die-cutting drum long life, die-cutting quality is good but the price is high, while the package is the opposite; die-cutting methods are shear and press-cut two , The former die-cutting high precision, long life but the price is high, the latter is the opposite. Therefore, according to different print, different requirements and the number of printing to determine what kind of die-cutting drum.
Fifth, the choice of drying system
Flexible printing system can be divided into hot air drying system, far infrared drying system and UV curing system, the use should be based on printing materials, the use of ink and work environment may be.
In addition, if you want to print a good print in addition to models and a variety of configuration options are correct, but also to study the situation of supporting equipment such as plate quality, ink is good or bad, not only to choose the right equipment and a variety of materials to have very Good match. As the printing plate is flexible, the printing process inappropriate pressure will make the network deformation, printing pressure is difficult to grasp, so the plate to consider the scaling ratio.