The rubber rollers (including water rollers and ink rollers) of the printing machine play an important role in the printing process, but in actual production, many printing companies will soon replace the original rubber rollers. Most manufacturers have insufficient cleaning and maintenance work on the rubber rollers, resulting in premature aging of the original rubber rollers, causing printing failures and cost losses.
In this regard, we will make a large inventory of the reasons for the wear of printing rollers, and share 10 tips for rubber roller maintenance.
Reasons The improper use or operation of the rubber roller of the inventory printer will shorten or damage the life of the rubber roller. The senior experts of Printing Jun summarized as follows:
â‘ Improper adjustment of the pressure of the ink roller will cause the abrasion of the ink roller, especially if the pressure is heavier and lighter, it is easy to damage the rubber roller.
â‘¡ Forgetting to close the handles at both ends of the water bucket roller will cause the colloid of the metering roller to tear and damage. If one end is not closed or one end is not in place, it will cause the metering roller and the plate water roller to wear.
â‘¢ In the process of installing the plate, the PS version is not in place and the bite of the PS version and the pull screw at the end of the version are not tightened. The PS version will wear out the rubber roller due to the unstrained part. If it is too tight or the top plate is too strong, the plate will be deformed or broken and the ink roller will be damaged. Especially the plate water roller has the most obvious damage due to the low rubber hardness.
â‘£During the printing process, when printing a long order, the running conditions at both ends and the middle are different, which will cause the ink rollers to wear at both ends.
⑤ Poorly printed paper, the paper powder and sand particles on the paper will cause the ink roller and copper roller to wear.
â‘¥Screw the gauge line or make other marks on the printing plate, causing damage to the ink roller.
⑦During the printing process, due to poor local water quality and high hardness, and the printing plant did not install an appropriate water treatment device, resulting in the accumulation of calcification on the surface of the ink roller, which increased the rubber hardness and increased friction. The problem will not only cause the ink roller to wear, but also cause serious print quality problems.
⑧ The ink roller is not regularly maintained and recycled.
⑨ Ink washing without a long time and the surface area of ​​the metering roller will also cause abrasion.
â‘©Special processes, such as printing gold and silver cardboard, stickers or films, require special inks and special additives, which will accelerate the cracking and aging of the rubber roller.
⑪The roughness of the ink particles, especially the roughness of the UV ink, has a direct effect on the wear of the rubber roller.
⑫The rubber rollers in different parts wear out at different speeds. For example, the ink transfer roller, due to the continuous reciprocating motion of stationary → high speed → stationary, its degree of wear is faster than the general one.
⑬Relying on the water roller and the ink roller, due to the axial movement with the string (water) ink roller, the abrasion at both ends of the rubber roller is larger than the middle.
â‘When the machine is shut down for a long time (such as the Spring Festival holiday), the rubber roller is squeezed for a long time, causing the rubber roller to have an uneven diameter, and the rubber roller is rotated and deformed differently, which aggravates the wear of the rubber roller.
â‘® The working environment has poor temperature control (too cold or too hot), which exceeds the physical property range of the rubber roller colloid, which aggravates the rubber roller wear.
The top 10 tips to extend the life of ink rollers, printing experts suggest that the following matters should be kept in mind during actual operation:
â‘ The pressure adjustment of the ink roller should meet the requirements. Check the pressure of the plate roller every week.
â‘¡When the operator just starts work, he should check the parameters of the water tank, and then wait for the water in the water tank to reach the water level, then jog the bucket roller, and finally close the handles at both ends of the bucket roller, jog the bucket roller to make the measurement There is a uniform water film on the roller surface.
â‘¢Because the ink roller is a wearing part, the customer should use the random ink roller and water roller for rotation according to the maintenance specifications of the printing press, remove the ink roller for maintenance every month, and recycle the two sets of water and ink rollers.
â‘£Be careful when loading, pulling and topping, do not deform or damage the plate too much. If the deformation is too strong or damaged, you should replace it immediately.
⑤ Do not scratch the gauge line or other marks on the plate.
â‘¥ Car wash once every shift and keep the metering roller clean.
⑦ Pay attention to the cleaning and maintenance of the water roller.
⑧Periodically clean and decalcify the ink roller regularly with ink roller cleaner.
⑨ After the maintenance of the removed ink roller with staining cream, please keep it away from light; pay attention to check the bearings on both ends of the disassembled ink roller.
â‘© Pay attention to the temperature requirements of the operation and improve the working environment.
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