Dry goods: Top 10 maintenance tips for printing rollers
One year's plan lies in the spring. In 2016, the printing companies have been working hard to produce. While grabbing production, do n’t forget to control and save costs ~~
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.
Reason inventory
During the use of the rubber roller of the printing machine, due to improper use or operation, it will cause the life of the rubber roller to be shortened or damaged. The senior experts of Printing Jun summarized as follows:
â‘ Improper adjustment of the pressure of the ink roller will cause the ink roller to wear, 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, the colloid of the metering roller will be torn and damaged. 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 plate is not installed properly, and the bite of the PS plate and the plate screw at the end of the plate are not tightened. The PS plate will wear out the rubber roller due to the emptying of the untensioned portion; 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‘£ In 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‘¥ Use a sharp tool to draw gauge lines or make other marks on the printing plate, causing damage to the ink roller.
⑦ During 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 Long-term non-washing of the car and metering roller surface ink can 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.
⑪ The roughness of the ink particles, especially the roughness of the UV ink, has a direct impact on the rubber roller wear.
⑫ Different speeds of rubber rollers in different parts. 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.
⑬ Relying on the water roller and ink roller, due to the effect of the axial movement with the string (water) ink roller, the wear on both ends of the rubber roller is larger than that in the middle.
â‘ In the long-time shutdown (such as the Spring Festival holiday), the rubber roller is statically squeezed for a long time, resulting in uneven rubber diameter of the rubber roller, variable rotation and deformation of the rubber roller, and increased rubber roller wear.
â‘® Poor temperature control in the working environment (too cold or too hot), beyond the physical properties of the rubber roller colloids, aggravating the rubber roller wear.
Top 10 tips
To extend the service life of the ink roller, printing experts recommend 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. 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 loading the top plate. 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.
⑧ Regularly perform deep cleaning and decalcification of the ink roller 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 operating temperature requirements and improve the working environment.
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