Six Problems Should Be Paid Attention To In The Use Of The Rubber Roller Of The Offset Printing Machine

Six problems should be paid attention to in the use of the rubber roller of the offset printing machine

The printing rubber roller mainly transfers ink on the offset press. Therefore, the rubber roller must be cleaned carefully during daily cleaning, otherwise the surface layer of the rubber roller and the pigment and resin will oxidize to form a smooth and hard film, which will cause the surface to vitrify and affect ink transfer. If it is often cleaned, the surface of the rubber roller will be uneven and not easy to use. Therefore, the rubber rollers should be cleaned and stored for later use during shutdown.

In the offset printing operation, the ink is emulsified due to "large water and large ink", forming a hydrophilic foundation on the smooth rubber roller, making it deinking. The solution is to shovel the emulsified ink, wash the deinking rubber roller with gasoline, mix and polish with 5% sodium hydroxide aqueous solution and pumice powder, and also deal with the metal roller (or hard roller) accordingly. The hard roller can also be polished with fine water sand under the water-sprinkled state. Be careful not to stay in the same place, otherwise it will damage the rubber roller. The fundamental method is to control the pH value of the hopper liquid to improve the ink balance.

The rubber roller has been used for a long time and is aging, coupled with the erosion of chemicals, causing the rotten glue to lose "slag". Do not use such rubber rollers, otherwise it will seriously affect the quality of printing.

In order to ensure that the production and printing quality are not affected, spare ink rollers must be provided, but do not store too much to avoid aging. The storage environment of the rubber roller is the same as the blanket. In addition, the rubber rollers should be set up straight at the journal, and the surfaces should not touch each other