How rubber rollers print high-quality products

As a rubber roller, the factory rubber roller has a great influence on the printing quality of the product. It can be said that only a good rubber roller can print high-quality products. Therefore, how to scientifically, correctly and reasonably use and maintain the printing rubber roller is a production skill that printing operators should master. It is of great significance to improve production efficiency and ensure printing quality.

During the printing process, in order to achieve uniform ink transfer, the colloid surface must maintain a certain viscosity. But since the rubber roller has been used for a long time, the surface of the rubber roller will lose its adhesion to moisture. In addition paper dust and other characteristics (eg paper dust and other characteristics) can affect ink transfer and can easily cause uneven ink distribution.

In order to maintain a certain viscosity of the rubber roller, it is necessary to prevent the ink from drying too fast and cause the rubber roller to skin, and to control the dry oil amount of the ink that needs to be added together with the dry oil. Generally speaking, the amount of resin dry ink plus white dry oil does not exceed 5%; oily ink plus white dry oil does not exceed 10%; red dry oil plus about 2% grease is appropriate to avoid the rubber roller affecting the printing quality. In order to keep the rubber roller clean, the rubber roller should be properly cleaned at the right time, but the impurities and paper dust on the colloid should be removed to improve the ink transfer performance.

The correct position of the rubber roller is directly related to the uniformity of ink transfer and brushing as well as 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 roll and the iron roll is too high. On the one hand, the rubber roller is deformed under pressure, and the gel is easily expanded by heat. It thins easily when heated, which affects the quality of the printing ink. On the other hand, tungsten carbide rollers can easily damage the rubber roller shaft head (bearing) or shaft hole. If the inker roller is not properly adjusted in height, raising it may cause uneven ink distribution. If it is adjusted too low, it is easy to scratch the gel and increase plate wear. The inking roller should therefore be adjusted to balance with the layout of the printing plate to ensure even brushing across the printing plate.