The unique patented technology of a Dutch company, ULTRACELL laser engraving method, adopts variable pulse technology, which makes the shape of the engraved mesh appear U-shaped, and the average amount of ink carried by the anilox roller with the same number of lines and the depth of the mesh hole. CO2 engraving is 10-15% higher and the surface is smoother, with greater tension and better ink transfer. In this way, we have reason to increase the number of lines of the printing roller without worrying about the color density of the printed matter that cannot meet the customer's requirements. Only a few lines to improve the corrugated rolls, in order to increase the number of plate lines, refine or "minimum network", without more uniform adjustment of an ink layer of these parameters, provide higher cable also make your printing quality on more One floor. The second step to improve printing accuracy is to choose a more reasonable way to scrape ink
At present, the main method of scraping ink is two kinds: rubber roller scraping and ink scraping. The former's "uniform ink" function exceeds its "squeegee" function and is suitable for printing full-size and less demanding outlets. If you want to improve the accuracy of your network as much as possible, you must use a scraper. This is why the middle and high-end equipment on the market is almost always equipped with scrapers. But I also heard that the equipment of some companies originally used a scraper and later changed to a rubber roller. The reason is that the scraper can not only cleanly scrape the excess ink on the anilox roller surface, but also bring us a beautiful printing effect. The "function" of quickly wearing the anilox roller is faster. This is a big test for the wear resistance of ceramic anilox rolls.
ULTRAMELT mesh trimming technology, this time will reflect its value. The basic principle of ULTRAMELT technology is to allow some of the ceramic melt to resolidify on the surface of the mesh under the premise of maintaining a higher ink volume, and to form a smooth protective layer on the mesh and the mesh wall, so as to improve the abrasion resistance of the roller. the goal of. Against scratching, the effect is obvious. At the same time, the transfer performance of the ink, the easy cleaning performance of the roller, and the reduction of the blade wear are also improved.
Of course, the main reasons for the gravure roll are the design of the machine, the type of scraper, the pressure of the scraper, the ink, the impurity content of the carton, the environment of the factory, etc. ULTRALMELT technology can only reduce scraping and extend the service life of the grind roller. Inability to cure scratches.
It seems that in order to improve the quality of carton printing, it is necessary to increase the number of plate lines and reduce the "minimal dot" before that the number of lines of the roller must be increased and the ink squeegee system must be improved. If you do not increase the number of lines and use a doctor blade to scrape ink, otherwise you will encounter technical problems that cannot be solved everywhere.
Some misconceptions about the application of roller
The higher ink loading of the roller results in stencil printing and waste of ink. First of all, as long as the principle of selection of the number of lines in the above table is satisfied, the paste version must be caused by other reasons. Secondly, the amount of ink delivered is influenced by the viscosity, PH value, squeegee method, squeegee pressure, etc. The new roller has a high amount of ink and can be adjusted through these aspects. If the newly-acquired roller load is only "sufficiently enough," the short-term wear or slight blockage will immediately cause the ink-carrying capacity to be insufficient, resulting in irreversible.
The steel blade scrapes the anilox roller. In fact, whether it is a plastic scraper or a steel scraper, their wear on the rollers is insignificant. The actual ceramic roller can be scraped from the ink, cardboard, or air into the hard particles in the scraping system. The anilox roller rubs against the doctor blade and the anilox roller. It has been proved that the scraping of the roller with a steel blade scraper is much smaller than that with a plastic scraper, because the steel blade scraper is hard and thin, and foreign particles are harder to stay at the blade position.
Long Chen Printing Technology Network