The application of brush rollers in the deduster of printing machinery_FAQ

The application of LCDA powder remover can be used with varnish glazing, so that the printed matter after glazing maintains high brightness and flatness. At the same time, it can be used with various types of laminating film to eliminate the snow spots caused by powder spraying and dust and increase the adhesion when the packaging printed matter is laminating after powder removal. In the packaging and printing process, many packaging printing factories have adopted the method of spraying powder on the packaging printed matter to solve the smearing problem caused by the wet ink, but the remaining powder spraying has brought trouble to the post-printing process; The film is not sticky firmly, there are many snowflakes, the effect after glazing is not good, there are pitting on the surface, especially large-scale high-end packaging printed matter, the powder spraying treatment is not clean, the effect of filming or glazing is particularly poor. Therefore, powder cleaning measures must be taken before surface treatment of printed matter. Methods include manual dusting with feather duster or other manual methods, mechanical powder removal and so on. The manual method has poor powder removal effect, low efficiency, and is prone to secondary pollution; the machine has good powder removal effect and high efficiency, and more and more manufacturers use this method. However, due to the differences in the powder removal structure designed by the manufacturers of powder removal equipment, the powder removal effect is not ideal. According to the powder removal effect test of the relevant machines by our factory, it is found that the powder removal is not clean, and some can be removed at the beginning. Very good, but after working for a period of time, it is not clean and so on. The powder remover itself has differences in design principles and quality, and the performance of the machine is different. Because there are basically 3 layers of spray powder remaining on the surface of the printed packaging product after printing, the first layer is the spray powder floating on the surface of the packaging printed product, the second layer is the spray powder that has adhered to the surface of the ink, and the third layer is A small amount of spray powder that has been dissolved in the ink. Therefore, in order to achieve a true powder removal effect, it is necessary to remove the **** layer and the second layer of powder spraying. Under normal circumstances, the machine uses a rotating brush roller to sweep the powder or a rubber roller with water to remove the powder from the **** layer, and a pressurized steel roller to press the second layer of spray powder that sticks to the surface of the ink. The bristles used by the brush roller will generate static electricity due to friction during the powder sweeping process, the bristles themselves will stick to dust, and the powder particles will be entrained in the middle of each tuft, that is, between the bristles. If there is no self-cleaning device, the bristles The powder sticking to the brush roller itself will cause secondary pollution to the packaging products, especially the paper packaging. If the efficiency of the matching powder pumping system is low, and the powder sweeping direction and speed are unreasonable, the powder removing effect will certainly not be good. However, most powder removers have poor self-cleaning structures or mechanisms for their brushless rollers. This is the cause The key reason why many powder removers can’t clean the powder and clean the powder: the main purpose of the pressure steel roller at room temperature is to flatten the dust particles sticking to the surface of the ink, avoid filming, and appear dots after glazing. Things. However, the pressure steel roller and rubber roller will stick to the dust in the process of pressing the packaging paper. If there is no self-cleaning function, a small amount of residual powder will accumulate on the steel roller and rubber roller, and it will be repeated again. Contaminate paper. In order to solve the above problems, the coating structure and coating water are used to carry out the powder removal test. The effect of cleaning the floating powder on the surface of the paper packaging is good, but it is not suitable for thin paper. It increases the water content of the paper and cannot remove the powder sticking to the ink surface. , Can not effectively improve the surface coating performance of paper. Welcome to www.mxbrushmachinery.com