How to maintain anilox roll and scraper

How to maintain anilox roll and scraper If the anilox roller is used for a long time, the bearings at both ends will be worn and the printing ink will be incomplete. At this time, the bearings at both ends should be replaced in time www.chinacartonmachine.com In carton mechanical equipment, the long-term use of the anilox roller of the printing machine will cause the bearing wear at both ends, resulting in the printing ink defect. At this time, the bearings at both ends should be replaced in time. Before problems are found in the printed matter, the operator can also check it. A dial indicator can be used to test the circumferential runout of the anilox roll, or it is normal to feel stable when placing hands on the scraper holder during operation. In case of shaking, replace the bearing in time. In order to ensure the printing accuracy and products, the run out value of anilox roller, plate roller and printing roller shall not exceed ≤ 0.02mm. 2. After the doctor blade is worn, it shall be replaced in time. At ordinary times, take apart the tool holder for cleaning, and clean the ink in the scraper and press blade. The ink in the tool holder hasn't been cleaned for a long time. After installing the scraper, the blade will be curved and uneven. The amount of ink scratched on the anilox roll will form a circumferential ink mark, which is difficult to adjust during printing. Scraper material is divided into stainless steel scraper and polyester plastic scraper. Plastic scraper is generally used for full page printing, which is better. Due to the high-speed operation of the flexographic press and the rapid wear of the blade, polyester plastic scraps will often fall into the ink or be sandwiched between the scraper and the screen pattern, and then transferred to the plate, affecting the printed matter. Due to small wear, steel scraper is generally installed in reverse direction for scraper, with an angle of 300 ~ 400. The angle and pressure of scraper depend on the adjustment of scraper spring (cylinder). The flexo printing machine runs for a long time, and the abrasion of the scraper is faster, so the correct installation of the scraper is particularly important for printing. Pay attention to cleaning the ink in the tool holder and pressure bar when replacing the worn blade. If there is dry ink in the tool holder and press blade, the blade will be bent and uneven after the scraper is installed, and the anilox roll will also produce circumferential ink mark, which is difficult to adjust during printing, affecting the printed matter. Clean the blade after each printing, use alcohol to wipe the blade, and evaporate the water on the blade, so as to prevent the blade from rusting and affecting the uneven scraping of the printing machine.