Rubber roller performance and maintenance essentials

2018-11-18 10:02:43

　　First, to maintain the surface of the rubber roller to improve the viscosity, to achieve good ink transfer, ink effect.

　　In the printing process, to achieve uniform ink transfer and ink distribution, the surface of the gel must maintain a certain viscosity. However, since the rubber roller is used for a long time, the surface thereof is lost with moisture, and the adhesive property is lowered. In addition, due to paper dust, paper wool and other properties, which affect the transmission of ink, it is also easy to cause unevenness of the ink. In order to maintain a certain viscosity of the rubber roller, the ink should be prevented from drying too fast to make the rubber roller crust, and the amount of dry oil should be controlled for the ink to be added with dry oil. In general, the amount of resin ink plus white dry oil does not exceed 5%; oil type ink plus white dry oil does not exceed 10%; red dry oil plus amount is about 2%, so as to avoid the impact of the rubber roller to affect the printing quality. In order to keep the rubber roller clean, the rubber roller should be cleaned as appropriate, except for the impurities on the colloid and paper dust to improve the ink transfer performance.

　　Second, to accurately and high-speed the rubber roller in the appropriate position on the printing machine, to avoid damage caused by improper use of the method and poor ink.

　　The proper position of the rubber roller is directly related to the uniformity of ink transfer and ink brushing, and also relates to the durability of the rubber roller. Therefore, the contact pressure between the ink rollers should be kept uniform and moderate. The contact pressure between the bitter ink roller and the tandem iron roller is too large. On the one hand, the rubber roller is deformed under pressure, and the colloid is easy to disperse heat and expand. It is easily thinned by heat and affects the quality of printing ink. On the other hand, it is easy to damage the roller head (bearing) or shaft hole. If the level of the inking roller is uncomfortable, if it is too high, it will cause uneven ink and ink. If it is too low, it will easily scratch the gel and increase the wear of the plate. Therefore, the inking roller should be adjusted to maintain a balance with the printing plate to ensure uniformity of the entire printing surface. When the height of the ink roller is in contact with the printing plate, a 40g toughness paper strip can generally be placed on the printing plate. When the ink roller is rolled up, the paper strip can be pulled with a pressure resistance feeling.

　　Third, the essentials of the correct use and maintenance of the rubber roller

　　1. The newly cast rubber roller should not be put into use immediately.

　　Since the internal structure of the newly cast rubber roller is not stable enough, it is easy to reduce the service life if it is put into use immediately. Therefore, the new rubber roller that has just been released should be placed for a period of time, so that the rubber roller maintains a relatively stable state after being exposed to the ambient temperature and humidity, which can increase the toughness of the colloid and thereby improve the durability.

　　2, the correct storage of idle rubber roller

　　After the rubber roller to be used should be cleaned, the plastic film is used to seal the gel and placed on the rubber roller frame. Do not stack a few pieces or place it on the wall to avoid the undue loss of the gel. . During the transportation process of the used rubber roller to the processing and casting, it is forbidden to throw the chaotic pressure or heavy pressure, keep the roller core unbiased and not bent, to ensure the normal use of the roller core.

　　3, rubber roller shaft head, bearings should maintain good lubrication

　　We know that the precision of the rubber roller shaft head and bearing directly affects the effect of ink transfer and ink discharge. If the lubrication is poor, the shaft head of the rubber roller and the wear and clearance of the bearing will inevitably lead to the disadvantage of uneven printing ink color. At the same time, it will also cause printing bar marks due to bad conditions such as jumping rubber and slip rubber. Therefore, the rubber roller shaft and the bearing should be filled with lubricating oil to prevent the normal use of the rubber roller and ensure the printing quality.

　　In summary, the scientific and rational use and maintenance of the brush roller plays an important role in improving production efficiency and ensuring product printing quality.