First, install and debug
1, loading and unloading
When the rubber roller is installed, the shaft head and the bearing must be fitted with a certain degree of precision and cleanliness. They should be gently lifted, and should not collide with the shaft head and the adhesive layer, so as to avoid damage, bending and damage of the adhesive layer.
2, lubrication
The rubber roller head and bearing should always maintain effective lubrication. If the lubrication is poor, it will cause the rubber roller head, bearing wear, gap increases, resulting in uneven printing ink. At the same time, the print marks can also be caused due to defects such as bouncing and sliding of the rubber roller. If there is no effective lubrication for a long period of continuous operation, it will cause the bearing and the shaft core to generate heat, causing the rubber surfaces of the two rubber rollers to expand and wear due to thermal expansion, so as to make the two rubber surfaces produce pockmarks, glue drop and cracks.
3, debugging
The pressure between rubber roller and rubber roller and printing plate should be adjusted properly according to the elasticity and hardness of rubber and its role in the printing process. Generally, the feeler gauge of O.15～O.20mm is used (the feeler gauge should be lubricated to avoid damage The rubber surface) is tested and the radial contact pressure of the rubber roller must be uniform. Otherwise, long-term operation will cause the pressure of the rubber roller at one end to produce numbness, glue drop, cracking, and open glue.
Second, use and maintenance
1, before printing
Check whether there is foreign matter between the roller and the roller, whether the roller is intact, and whether the roller pressure is even and consistent, confirm the normal, and clean it before printing.
2, in printing
The roller should always maintain a good contact state during operation, and the force is uniform. Regardless of the width of the printed product, the entire rubber surface of the rubber roller should be lubricated with ink. The amount of ink accumulated between the rubber rollers should be adjusted in time to ensure the printing quality.
Under the premise of guaranteeing the printing speed, in order to prevent the ink from drying too quickly, the cohesiveness of the rubber roll will be reduced, and the surface will have a skinning phenomenon. The amount of dry oil should be controlled for the ink that needs to be added with dry oil to prevent the running roller from being produced. Do not ink and spread ink inequality phenomenon.
3, after printing
It is necessary to disengage the rollers, rollers and rollers from the printing plate in time to remove the load pressure and prevent the plastic surface from being deformed due to static pressure. It is necessary to clean the residual ink on the surface of the rubber roller in time to prevent it from drying and producing ink sticks, ink film, ink stains and dirt floating on the plastic surface. (Especially the ink sticks on both ends of the nylon roller) will grind and damage the rubber surface finish when it is running again. Seriously, it will produce pockmarked dregs.
4, rubber roller cleaning
Before and after printing, the rubber roller must be cleaned with a special cleaning agent to keep the surface of the roller clean and ready for use.
If the cleaning is not timely, the ink will adhere to the micropores through the villous micropores on the surface of the rubber roller, and the paper wool and the dirt will adhere to the surface of the roller. If the parking time is too long, the ink conjunctiva will cause the contact surface of the two rollers to stick together. When the car is driven, it will tear the rubber surface and cause the rubber roller to be scrapped.
If the cleaning is not in place, glazed phenomenon will occur, which will lead to the decrease of ink-receptivity and ink-transferability and even cause deinking. The glaze makes the surface hardness of the rubber roller increase and the elasticity decreases. At the same time, the abrasion of the rubber roller is accelerated, resulting in the occurrence of pitting and cracking of the rubber surface, resulting in drossing and affecting the printing quality.
Note: Glazing refers to the hardening of the surface of the rubber roller as a mirror-like phenomenon.
5, the requirements of the cleaning agent
1 Non-flammable, safe and reliable, no pollution to the environment.