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The squeegee mechanism is mainly composed of a susceptor, a squeegee holder, a scraper and a pressing device. In operation, under the push of the cylinder piston, the scraper abuts against the surface of the plate cylinder, and the pressure valve adjusts the pressure exerted by the scraper on the printing plate. Work as much as possible to reduce the pressure of the scraper to the minimum required to reduce the wear between the scraper and the plate. This article will introduce you to the flexo squeegee offer.
Such periodic fluctuations not only have a certain influence on the plate roller base, but also the effect on the doctor blade is very obvious. The long time vibration will make the doctor blade scrape dirty, resulting in dirty version. A phenomenon occurs. By increasing the pressure on the doctor blade pressure, the problem can be solved in a short period of time, but the problem cannot be solved fundamentally, and it also has a significant impact on the service life of the doctor blade.
The polishing quality of the surface of the plate roller is mainly manifested by the number of burrs around the cell. The good quality plate has a clean, no burr, and the cells are clear and there are no impurities inside. This ensures that the plate roller does not damage the doctor blade during the printing process. After the squeegee is frequently replaced, if there is still a ruled line on the printed product, it can be generally determined that there is a problem of polishing quality of the plate roll.
When the squeegee blade is damaged and there is a gap, there will be a regular knife line moving left and right on the printing, which is easier to identify. If the gap on the squeegee is small, it can be polished to smooth and smooth with oil stone or fine sandpaper. If the gap is large, a replacement squeegee is required. When replacing the knife, the ink accumulated in the pressure blade and the sipe must be completely removed first, so as not to affect the flatness of the squeegee installation, and the length of the squeegee exposed to the pressure blade portion should be consistent, about 5 mm. In the printing process, some squeegees need to be combined with the printing plate for a long time to achieve a good squeegee effect. At this time, the edge of the squeegee can be smoothed with metallographic sandpaper to make the squeegee reach Better ink scraping effect and is beneficial to the improvement of raw efficiency.
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