Anilox flexo printing machine is part of the heart, the impact of printing effect is essential, in the purchase of printing equipment, anilox select the configuration is important, but if improper maintenance measures will greatly reduce the anilox roll Service life. The daily maintenance of the anilox roller should do the following:
It is strictly forbidden to scrape, touch and hit the anilox roller
(1) Keep the equipment clean and clean. In addition to maintaining the environmental sanitation around the equipment, it is also important to keep the equipment clean, especially to keep the protective cover clean, to prevent the ink residue inside the protective cover from falling between the anilox roller and the rubber roller;
(2) Use clean ink. After a period of use, the ink may contain impurities or sand for various reasons, or some of the ink itself may contain impurities or sand. Therefore, before the ink is applied to the machine, it is better to filter it with a filter of 100 mesh or more, and a magnet is added to the ink inlet tube of the ink supply system;
(3) Ensure that the wipes are clean. This is an easy negligence problem. Many printers in the printing machine press the cloth on the floor after rubbing the plate, so that it is easy to adhere the sand on the floor to the wipe. Brought to the anilox roller by the printing plate, causing scratches on the anilox roller;
(4) Pay attention to the quality of the base paper. The surface of the base paper has a lot of impurities, and the ink has a certain viscosity. When the printing plate is in contact with the paperboard, the impurities on the surface of the base paper may be taken away and transferred to the anilox roll to the anilox roll. Causing damage, especially some coarse particles;
(5) When replacing or cleaning the anilox roller, it is forbidden to impact the anilox roller and should be carefully taken care of. If the anilox roller is hit, the mesh is damaged by light, which affects the printing effect; if the entire anilox roller is scrapped.
Do the cleaning work of the anilox roller
(1) Do the daily cleaning of the anilox roller. After working for a whole day, there is still a lot of ink on the bottom of the mesh roller. If the ink in the mesh is not cleaned in time, it is very difficult to clean the ink at the bottom of the cell. Thoroughly clean the ink in the cell, we need enough cleaning time to clean with a copper brush or steel brush and washing machine water.
(2) Thoroughly clean the anilox roller regularly. Even if the daily cleaning work of the anilox roller is done well, it is inevitable that ink remains in the bottom of the cell and dried up. Under the high magnification magnifying glass, this phenomenon can be clearly seen. Therefore, the anilox roller must be thoroughly cleaned regularly, such as a special cleaning solution, an ultrasonic cleaning method, a low pressure jet cleaning method, a dry ice cleaning method, a chemical solvent immersion method, and the like.
There are still several aspects to pay attention to.
(1) For the chamber scraper system, the following aspects should also be noted:
1 Clean the anilox roller with clean water. The chamber scraper system generally has an automatic cleaning function. At this time, where is the water used for cleaning? Is tap water or groundwater? In fact, the tap water is not clean, and the sand contained in it becomes the killer of the anilox roll.
2 Regularly clean the metal plate holding the scraper. Open the metal plate holding the scraper, you will see something shocking: ink residue, rust, impurities, etc., if not cleaned up in time, it is also the killer of the anilox roller;
3 to ensure the sealing of the ink supply system, and it is best to add a filter device (120 mesh or 140 mesh) at the ink inlet, which is very necessary.
(2) For ceramic anilox rolls, care should be taken not to be close to the heat source. Excessive temperatures can cause the ceramic layer of the ceramic anilox roll to fall off.
How the anilox roll is maintained can be judged by observing its appearance and examining it with a magnifying glass. Well-maintained anilox roller with clear surface, consistent color and gloss, no obvious pigmentation, back-light observation, no obvious scratches or damage; and improperly maintained anilox roller, the surface is blurred, dull, with obvious pigmentation If there are scratches or damage, you can see it by backlighting. Observed under a high magnification magnifying glass, the cells are clean or not, at a glance. Conditional manufacturers can also use the density meter to detect and evaluate the density of the printed field, so that it can be judged whether the anilox roller is clean.
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