The water and ink parts of the printing press are composed of many rubber rollers with different diameters. These rubber rollers will be worn down after a period of normal use. What impact will they bring after grinding? What precautions should be taken? Here the author puts forward some of my own views.
The reason why the rubber roller is small
As we all know, the arrangement of rubber rollers is soft and hard. If the hard roller and the hard roller touch, there is almost no compression between them, the ink can not transfer the font, and the vibration is relatively large; if the soft roller and the soft roller touch, the compression between them is too large, so Increased friction between rubber rollers, greatly reducing the service life of rubber rollers. Therefore, the rubber roller can only use soft and hard arrangement to complete the transfer of ink, which can reduce vibration and friction.
Due to the existence of hard rollers, rubber rollers will deform under long-term pressure. Network publishing will inevitably wear down over time. The most powerful one should be the soft roller that directly contacts the ink roller. Because the inking roller moves back and forth, when it moves to the other side of the soft roller, the place where the soft roller does not contact the inking roller will inevitably return to the compression and deformation and return to its original state. Machine, it will be squeezed, so that the wear of the soft roller is more severe.
After the ink roller has been working for a long time, ink will remain at both ends. After a long time, the ink will dry and become hard. Ink rollers dry grinding e-commerce on these dried ink residues will also become smaller and smaller. In addition, the ink roller becomes dirty after long-term work, and the surface is in a mirror state. Originally, the rollers are rolling friction, and when they are in the mirror state, they become sliding friction HP. Got smaller and smaller.
Small impact of rubber roller grinding
The first impact of rubber roller grinding is the ink capacity. The ink volume refers to the ratio of the total ink amount on the surface of the ink roller to the ink amount on the plate surface. Once the ink volume changes, when printing large areas of solid patches, the problem of insufficient ink supply will appear. The phenomenon of dark and light before and after printing is more serious in offset presses, and the ink color of the entire printed product is very uneven. Therefore, once the diameter of the rubber roller is smaller than 2mm, it must be replaced in time.
Measures to control small rubber roller grinding
Small rubber roller grinding is inevitable, but we can control it through some measures. First of all, the pressure between the ink rollers should be correctly adjusted in strict accordance with the instructions of the machine, and it should be checked regularly. Secondly, it is necessary to perform deep cleaning on the ink roller regularly, and clean up the accumulated ink on both ends of the ink roller in time. Do not let the surface of the ink roller be coated with a mirror state.
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