Maintenance Of Rubber Roller

Lubrication of rubber roller

The head and bearing of the rubber roller should be regularly and effectively lubricated. If the lubrication is not good, it will cause the rubber roller shaft head and bearings to wear and increase the gap, which will cause uneven printing. At the same time, printing bumps may be caused by bad conditions such as rubber roller jumping and sliding. If there is no effective lubrication in continuous operation for a long time, it will also cause heating of the bearing and shaft core, causing the rubber surface of the rubber roller to expand and wear due to heat, so that the rubber surface of the rubber surface will be pitted, peeled, and cracked.

Points to note when using rubber rollers

Before printing, check whether there is any foreign matter between the roller and the roller, whether the rubber roller is intact, whether the pressure between the rollers is uniform, and the radial contact pressure of the rubber roller must be uniform. Otherwise, running for a long time will cause the rubber roller on the side with higher pressure to produce pitted surface, glue falling, cracking, cracking, etc. Printing can only be performed after confirming that it is normal and clean and smooth.

The rubber roller should always maintain a good contact state during operation. Regardless of the width of the printed product, the entire rubber surface of the rubber roller must be lubricated with ink; depending on the amount of ink accumulated between the rubber rollers, the ink volume should be adjusted in time to ensure printing quality. Under the premise of ensuring the printing speed, in order to prevent the ink from drying too fast, the rubber roller’s viscosity is reduced, and the surface is skinned, the amount of drying oil should be controlled for the ink that needs to be added to prevent the running of the rubber roller. Uneven ink application and transmission.

Rubber roller cleaning

The rubber roller must be cleaned with a special cleaning agent before and after printing to remove ink skin, ink residue and other impurities to keep the surface of the rubber roller smooth and clean. If it is not cleaned in time, the ink will stick to the micropores through the fluffy micropores on the surface of the rubber roller, and paper wool and dirt will adhere to the surface of the rubber roller. If the parking time is too long, the ink film will cause the contact surface of the two rollers to stick, and dry to form a hard ink block. When the hard ink block is driven again, it will tear the rubber surface, produce pitted surface and slag, and make the rubber roller scrap. If the cleaning is not in place, glaze will occur, which will result in reduced ink affinity and transfer, and even deinking. Glazing increases the surface hardness of the rubber roller and decreases its elasticity. At the same time, it speeds up the abrasion of the rubber roller, causing pitting and cracking on the rubber surface, causing slag drop and affecting printing quality.

The rubber rollers should be cleaned carefully every day after the production operation is completed, and washed twice. It is worth noting that the cleaning of the printing rubber roller must use designated chemical agents, such as industrial alcohol, etc., and must not use corrosive solvents; UV ink rubber rollers use special cleaning agents for UV inks, and alcohol dampening rollers use alcohol dampening rollers. Special cleaning agent. The rubber roller can be taken off during holidays to prevent deformation under pressure. For the protection of the surface of the printing rubber roller, it should be wrapped in newsprint and placed in a ventilated and dark place.