The anilox roller is the heart part of the flexographic printing machine, which is very important for the effect of printing. When purchasing printing equipment, the selection and configuration of the anilox roller is certainly important, but if the maintenance measures are improper, the Service life. The daily maintenance of the anilox roller should do the following:
It is strictly forbidden to scrape, bump or bump the anilox roller
(1) Keep the equipment clean. In addition to keeping the environment sanitary around the equipment, it is also important to keep the equipment clean, especially to keep the protective cover clean. It is very important to prevent the ink residue inside the protective cover from falling between the anilox roller and the rubber roller;
(2) Use clean ink. After being used for a period of time, the ink may contain impurities or sand particles for various reasons, or some ink inks may contain impurities or sand particles. Therefore, before the ink is put on the machine, it is best to filter it with a filter mesh of more than 100 mesh, and add a magnet to the ink inlet tube of the ink supply system;
(3) Ensure that the wipe cloth is clean. This is a problem that is easy to be neglected. Many operators of printing machines in packaging factories throw the wiping cloth on the floor after wiping the printing plate, so that the sand on the floor is easy to adhere to the wiping cloth, and Brought by the printing plate to the anilox roller, causing scratching of the anilox roller;
(4) Pay attention to the quality of the base paper. There are many impurities on the surface of the base paper, and the ink is sticky. When the printing plate comes into contact with the paperboard with the ink, it may also take away the impurities on the surface of the base paper and then transfer it to the anilox roller. Cause damage, especially some large particles of impurities;
(5) When replacing or cleaning the anilox roller, it is forbidden to impact the anilox roller, and care should be taken. If the anilox roller is hit, it will damage the mesh hole and affect the printing effect; if it is heavy, the entire anilox roller will be scrapped.
Do a good job of cleaning the anilox roller
(1) Do the daily cleaning work of the anilox roller. After working for a whole day, there is still a lot of ink on the bottom of the anilox roller. If you do not clean the ink in the mesh in time, it will be very difficult to clean the ink after the ink dries on the bottom of the mesh. To thoroughly clean the ink in the net hole, we need enough time to clean with copper brush or steel brush and washing machine water.
(2) Regularly thoroughly clean the anilox roller. Even if the daily cleaning work of the anilox roller is done well, it is inevitable that ink and ink will remain on the bottom of the mesh hole and dry up. This phenomenon can be clearly seen under a high magnification magnifier. Therefore, the anilox roller must be thoroughly cleaned regularly, such as using a special cleaning solution, ultrasonic cleaning method, low-pressure jet cleaning method, dry ice cleaning method, chemical solvent immersion method, etc.
There are several aspects to note
(1) For the chamber scraper system, the following aspects should also be noted:
â‘ Use clean water to clean the anilox roller. The chamber scraper system generally has an automatic cleaning function. At this time, where does the cleaning water come from? Tap water or ground water? In fact, the tap water is not clean, and the sand contained in it becomes the killer of the anilox roller.
â‘¡ Regularly clean the metal plate holding the scraper. Open the metal plate holding the scraper, you will see shocking things: ink residue, rust, impurities, etc. If these are not cleaned in time, they are also the killers of the anilox roller;
â‘¢ Ensure the sealing of the ink supply system, and it is best to install a filter device (120 mesh or 140 mesh) at the ink inlet, which is very necessary.
(2) For ceramic anilox rollers, care should also be taken not to be close to the heat source. Too high temperature will cause the ceramic layer of the ceramic anilox roller to fall off.
How well the anilox roller is maintained can be judged by observing its appearance and inspecting it with a magnifying glass. The well-maintained anilox roller has a clear surface, consistent color and gloss, no obvious stains, and no obvious scratches or damages when viewed under backlight; while the anilox roller with improper maintenance has a fuzzy, dull surface with obvious stains , If there are scratches or damage, you can see it in the backlight. Observe under a high magnifying glass, whether the net hole is cleaned or not, at a glance. Qualified manufacturers can also use the density meter to detect and evaluate the density of the printed field, which can determine whether the anilox roller is clean.
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