Problems in Laser Engraving Ceramic Anilox Rollers

What is the relationship between the number of printing screens and the number of anilox roller screens?

In many articles introducing flexographic printing technology, the ratio of the number of printing screen lines to the number of anilox roller screen lines is set to 1:3.5 or 1:4. Based on practical experience and analysis of award-winning products evaluated by the American Flexographic Printing Technology Association (FTA) in recent years, the author believes that this value should be higher, about 1:4.5 or 1:5, for individual fine prints. The product may be even higher. The reason is that the most difficult problem to solve when printing a gradation plate with a flexographic printing press is to enlarge the dot, and use an anilox roller with a higher number of screen lines, the ink layer is thinner, and the dot enlargement and deformation is relatively easy to be controlled. If it is found that the ink color is not strong enough during printing, a water-based ink with a higher color concentration may be used to ensure the quality of the printed product.

Which problems should be paid attention to during the use of the anilox roller

Here, we refer to the anilox rollers which refer to laser-engraved ceramic anilox rollers. They are used in aerospace and aerospace high-temperature, abrasion-resistant coating materials, and are used at a certain density, depth, and certain angles and shapes. Laser engraving. This anilox roller is characterized by its high cost and wear resistance. If it is used properly, its life can be as long as several years; if it is used improperly, not only the service life will be shortened, but also the anilox roller will be scrapped.

In the process of use, the position of an anilox roll on the printing press depends on the specific print, different prints, and the position of the anilox roll is different. Therefore, the wire roll is often replaced during printing. At present, narrow-width machines use mostly solid steel anilox rollers, which are very heavy. When mounting the anilox roller, care must be taken to avoid touching the surface of the anilox roller against other metal objects. Because the ceramic coating is very thin, permanent damage can be easily caused by a collision. During the printing and cleaning process, the ink should be prevented from drying on the anilox roller. The special detergent recommended by the water-based ink manufacturer should be used. The steel brush should be used for brushing, and the cleaning should be clean and thorough. And develop a habit of using high-power magnifying glass to observe the anilox roller nets. Once ink is deposited on the bottom of the net and gradually increase, it should be promptly cleaned. If the above method does not work, ultrasonic or sandblasting treatment can be used, but it must be done under the guidance of the anilox roller manufacturer.

Under normal use and maintenance conditions, there is no need to worry about the problem of anilox roller wear. The main component of the ink-transfer system that is subject to wear is a squeegee. Compared to this, the wear of the anilox roller ceramic coating can be described as negligible. When the anilox roller slightly wears, the ink layer becomes thinner.