subject: Analysis: How To Flexo Printing Press With Roller [print this page] Most of the printed product both on the ground, the line, but also a continuous tone image. To meet the needs of a variety of printed materials, the user can never take Flexo machine There are several Print Crossing a cell on the distribution Anilox roller Approach. To narrow unit Flexographic Printing Machine, for example, the introduction of more domestic type of 6 +1, or 6-color set specifically for multi-color printing, the last printing unit can carry out both UV coating.
We recommend no more than 150 lines for printed materials, this machine should be optional 6 +1 flexo roller 9. Of which 4 700 line, ink thickness 2.3BCM (10 billion cubic microns / inch), 60 of the roller used to level printing; 3 360 Line 400 Line, BCM6.0 left and right, 60 of the network printing rollers for the field pattern; 2 200 lines, BCM15 around, 60 of the anilox roller for printing gold coating. If you use water-based light oil, 360-line roller should be used, so that more oil is slightly thin, light oil will not affect the printing speed of drying problems. Light oil is not water-based UV light oil that special smell. V-home printing roller can test comparing established operator in the testing process can be observed in the ink layer thickness depends on the number line roller and BCM values.
Roller in the course of which issues should be noted
Roller here is that what we call laser engraving ceramic roller, it is to use aviation and space in the high temperature, wear-resistant coating material, according to a certain density, depth and a certain angle, the shape , formed by laser engraving. This roller is characterized by high costs and wear, if used properly, its life of up to several years; if used improperly, not only will shorten the life span, and the roller will scrap.
During use, a roller in the press depending on the location of the printed pieces, different printed pieces, roller position is different, so printing often swap cable roller. Narrow machine currently mostly used solid steel roller, very heavy, loaded when Royal roller roller surface to avoid that hit other metal items covered above. Because the ceramic coating is thin and, upon collision can easily cause permanent damage. And washing machines in the printing process, should avoid dry ink on the roller end, to use water-based ink manufacturer recommends special detergent, brush with stainless steel wash, to ensure that cleaning is removed completely. And develop a high power magnifying glass, often with the habit of observation point roller network, once found the bottom of ink deposited on the mesh points and a gradually increasing trend, should be promptly cleaned. If the above methods work, can be used such as ultrasonic or sandblasting treatment methods, but in roller under the guidance of the manufacturer.
In normal use and maintenance conditions, without fear of roller wear and tear issues, transfer ink system, easy to wear doctor blade main components, compared with ceramic coating roller wear can be said negligible. Roller slightly worn, ink will be thinner.
Reduced version of how the matter
We all know, a flexography printing paper feed direction along the way produced the phenomenon of elongation, elongation ratio and the two factors, one plate cylinder (including double-sided adhesive) in diameter, Second, the thickness of the plate itself. Version of the larger diameter cylinder, Plate Thickness of the smaller, the smaller elongation. A concept needs to be clarified here is that the phenomenon is not as printed in the elongation of the pressure only when, in fact, flexible printing plate by double-sided adhesive to the plate cylinder when the already produced elongation. Therefore, Design Mexico plans to be reduced when the version, according to the proportion of actual use of plate thickness and length of look-up table derived from the actual printing. The use of a computer to plate, simply complete the design before the ink color separation plan, to a one-way instruction can be reduced version. The use of a hand-made film, you need to use a texturing machine, and can be proportionately reduced version of the film.
Roller printing network lines and net lines have anything to do
Many introduced flexography technology article, the number will be printed cable roller cable and set the ratio of the number of 1:3.5 or 1:4. According to the American experience and Flexographic Technical Association (FTA) in recent years, the Top of award-winning products, I believe that this value should be higher again, at about 1:4.5 or 1:5, for the individual fine print products, this percentage may be even higher. The reason is that printing with flexo version level of the most difficult problems is dot gain, the higher the number of selected cable roller, ink is thinner, easier to be dot gain control of deformation. If it is found when printing ink is not strong enough, they can choose a color with higher concentration of water-based inks, to ensure the quality of printed products.
How to design easy to overlay the flexographic ink plan
In the printing process, it is often a key indicator of concern is the overlay, because the overlay caused by the waste are not allowed on all accounts for a significant proportion of waste. While flexographic printing press manufacturers in the design and processing has provided a good precision based overlay, automatic control system is also provided a guarantee for the accurate overlay, but the operator's skill level and proficiency of the overprint is also greatly affected the accuracy . If the ink in the design plan, can make some adjustments to facilitate the overlay, can greatly reduce the difficulty of the work of printing, reduce scrap.
Easiest way is to design draft to make full use of the original Mexican anti-white, or hollowed out between the two colors to form the outline of an anti-white, two color overlay can also be covered on the edge of the third thicker dark contour lines printed products for more fine print, can be used trapping (Trapping) technology, trapping capacity depends on the accuracy of press, printing on paper quality and operator level. Trapping processing on the computer is easy, if not the computer, only the ready-made color separations, trapping can use specialized processors (TrappingModifier), enter the trapping volume value, the machine will automatically produce a deal by the trapping the film. If there is no trapping processor, you can copy in color separation film and a transparent film placed between the spacers, copier with a single point of light exposure, the same effect can be similar to the film.
