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Rubber Coated Roller is a roll-shaped product made of metal or other materials and vulcanized. According to the use, it can be divided into paper-making rubber roller, printing and dyeing rubber roller, printing rubber roller, silicon rubber roller, metallurgical rubber roller and oil-printing rubber roller; etc.; according to the surface shape, it can be divided into the flat roller and pattern rubber roller; Butyl rubber roller, nitrile rubber roller, polyurethane rubber roller and silicone rubber roller.
First, to maintain the surface of the rubber roller to improve the viscosity, to achieve good ink transfer, ink effect.
Rubber Coated Roller
In the printing process, to achieve ink transfer, uniform ink, 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 transfer of ink, it is easy to cause unevenness of 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 ink transfer performance. In the offset printing operation, ink emulsification is necessary, but the emulsification of the ink due to "large water and large ink" will form a hydrophilic foundation on the smooth rubber roller, deinking the rubber roller, and the fountain solution corrodes the rubber surface. Therefore, under the premise of not sticky, the dampening solution should be as small as possible.
Second, it is necessary to accurately and high-speed the rubber roller in the proper 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, and 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 easily spread and distributed heat, and the ink is inflated. It is easy to be thinned by heat, which affects the quality of printing ink color; on the other hand, it is easy to damage the rubber roller shaft head (bearing) or shaft hole. If the level of the inking roller is uncomfortable, if it is too high, it will cause unevenness in 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.
We also have Electrostatic spraying Roller. The application range of electrostatic spraying is expanding. From large-scale railway passenger cars, automobiles, and tractors, to small workpieces, toys, household appliances, conveyor belts, etc., electrostatic spraying technology can be used.
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