Printing roller maintenance
How should the maintenance of printing roller
1, loading and unloading rollers installed in shaft and bearing with to ensure accuracy and cleanliness, should handle with care should not be collision spindle noses and adhesive layer, so as to avoid the damage of the roller body, bending and layer damage.
2, lubricating roller shaft, bearing should keep the effective lubrication. Such as poor lubrication, will cause rubber roller shaft, bearing wear, increase the gap, and even result in printing ink. At the same time also print staves caused due to adverse rollers jump and slide. Such as a long time continuous operation without effective lubrication, also can cause bearing, shaft core heat, causing rollers at both ends of the rubber surface thermal expansion and wear to make the both ends of the rubber surface pits, glue drop off and cracking.
3, debugging the pressure between the rollers and rubber roller and a printing plate to according to elastic rubber, hardness and its role in the printing process adjustment, general use O.15~O.20mm of a feeler gauge (feeler to lubrication, so as not to damage the surface glue) test, the radial contact pressure rollers must be uniform. Otherwise a long time operation may cause the partial pressure side of rollers have pits, glue drop off, cracking and debonding phenomenon.
Use and maintenance
1, printing before the check between roll and roll is free of foreign matter and rollers are intact, and pressure is uniform. To confirm the normal, bright and clean cleaning rear can be printed.
2, printing rollers in operation should always maintain good contact state, uniform stress. Whether printing format width, the rollers of the rubber surface ink oil lubrication; cots product between the ink amount how much should be timely adjust the amount of ink, to ensure the quality of printing. In ensuring the premise of printing speed, in order to prevent the ink drying too fast, cots viscosity decreased, surface crust phenomenon, the need to join the dryness of the oil ink should be used to control the amount of good dryness of the oil to prevent running rollers not ink and ink uneven phenomenon.
3. After printing to timely roll and roll and roll and a printing plate disengagement, load pressure is unloaded to prevent glue surface by static pressure and deformation. To timely cleaning cots surface residual ink, prevent dried to produce a piece of ink, ink film, ink excrement and dirt floating on the rubber surface, especially the two ends of the nylon and ink block) and operation will be crushed damage the rubber surface finishes, will produce serious pits dregs phenomenon.
Increase to reduce scrap, 4 roller cleaning rollers in printing before and after you should make special cleaning agent for cleaning rubber rollers clean, to keep the roller surface is bright and clean, stand-by. Cleaning is not timely, the ink through the roller surface villous microporous adhesion in within the pores of the paper hair, dirt attached to the roller surface. Such as parking time is too long, ink conjunctival will cause two roller contact surface adhesion, and driving will tear the rubber surface, the rollers. Cleaning is not in place, will produce glaze phenomenon, lead to a pro ink, ink, and even cause deinking. Glaze roller surface hardness, elasticity decline, at the same time to speed up the roller wear, resulting in the rubber surface pitting and cracking, resulting in dregs phenomenon, affect the printing quality.