Categories Cots
Use can be divided into: paper roller, printing rollers, printing rollers, hulling roller, rubber roller and metallurgy mimeographed Cots;
Press the surface morphology can be divided into: flat pattern roll and rubber roll;
Press material can be divided into: Butyl rubber roller, nitrile rubber roller, polyurethane rubber roller and silicone rubber roll.
Cots generally consists of an outer layer of plastic, hard layer, a metal core, roll neck and vent, whose processing including roll core sandblasting, bonding processing, plastic molding paste, cloth, wire winding, autoclave curing and surface processing and other processes. Cots mainly used in paper making, printing and dyeing, printing, food processing, metallurgy, plastics processing.
Precautions
* Offset printing rollers on the main transfer ink. Therefore, daily cleaning rubber roller must be carefully cleaned, otherwise the roller surface layer and pigments, resins easily oxidized layer of smooth, hard film, resulting in the surface of the glass affect the ink transfer. If regular cleaning is not the net, falling uneven roller surface will affect the use. Therefore, downtime should put away the rubber roller wash stand.
* In offset printing operations due to "big water Melbourne" produce ink emulsion, on a smooth rubber roller to form a hydrophilic base, it deinking. The solution is to shovel out the emulsion ink, the inking rubber roller wash with gasoline, hybrid grinding with a 5% aqueous solution of sodium hydroxide and pumice, while metal roll (or hard roll) has to be done accordingly. Hard roll may also be in the state sprinkled water washout, water, sand with fine sanding, careful not to stay fixed in the same foreign site, otherwise it will damage the rollers. The fundamental solution is to control the fountain solution pH value, improve ink-water balance.
* Cots used for a long aging, coupled with chemical erosion, resulting in bad glue out "slag", such Cots best not to use, or seriously affect the printing quality.
* To ensure that does not affect the production and printing quality, you must have a spare ink roller, but do not store excess avoid aging. Storage environment Cots and blankets same. In addition, the journal of the cot should be straight good frame, and the surface do not touch each other or in contact with other items in order to avoid plastic deformation of the roller.
* Cots and should not be stored in the vicinity of large motors, generators place. Because a lot of ozone causes the roller surface of these devices produce aging crack.
* In cold weather hit uneven ink, it may be appropriate to add supplementary material in the ink, prohibit the use of infrared heaters and other equipment baking ink roller, rubber roller to prevent oxidation.
maintenance
* New casting Cots not immediately put into use.
Because the new casting rolls of plastic internal structure is not stable enough, if used immediately, easy to reduce service life. They just left the barrel of the new rubber roller should be placed for some time, so that the rubber roller after contact with ambient temperature and humidity, to maintain a relatively stable state, which can increase the resilience of the colloid, thereby enhancing the durability effect.
* Cots idle properly stored.
Cots inactive should be cleaned after the colloid packets with plastic film and placed rolls of plastic shelves, must not casually stacked in one or a few handy against the vertical side wall, in order to avoid undue loss of the colloidal . Waste rubber roller during transport sent to the casting process, avoid indiscriminate abandonment pressure or stress, not to keep the roll core eccentricity, bend, in order to ensure the normal use of the roll core.
* Rubber roller head bearings should maintain good lubrication.
We know that precision rubber roller head, how direct bearing, direct impact on ink transfer, cloth ink effect. If poor lubrication caused rubber roller head, bearing wear, the gap will inevitably lead to uneven printing ink ills. But also due to jump plastic, rubber and other adverse conditions caused by slip printing bar marks. So, usually it should be ground to a rubber roller head, bearing filling oil to prevent engine wear rubber roller normal use, to ensure print quality.