In the offset printing process, especially the monochromatic offset printing machine, whether y, m, C, BK four-color printing, or trademarks, packaging and decoration often need to wash the ink color change, the offset printing machine inking system for cleaning and to replace the new ink. The ink cleaning device is composed of a rubber blade, an ink collecting groove and a tight loose adjusting screw.

Wash ink: roller doused in gasoline and car wash water, scraping ink device is installed in the wash ink groove position, tighten adjustment screw, so that the rubber knife is corresponding to the 40 degree angle and offset printing machine on the roller surface contact, on roller of longitudinal and lateral motion, will lose ink system on the old ink and gasoline continuously through the rubber knife scraping and washing to ink inside the slot.

Wash ink change color cleaning to clean thoroughly, for accurate grasp of printing color plays a key role, through the wash ink prints to hue is, the mose bright accurate, in actual wash ink change color in the process of operation should pay attention to the following points:

1. Wash ink scraping device, you must wash ink color change, or due to other factors need cleaning rollers can be mounted to an offset printing press, installation will ink at both ends of the groove of the eccentric pin shaft shelved in fixed on the wallboard of the offset printing machine supporting shaft opening groove and the adjusting nut is fixed on the wallboard of iron of the opening. And then start offset printing machine and screwed adjusting nut, the rubber knife blade slowly to on roller surface contact, around both ends of the regulating screw contact pressure evenly, rubber knife and string of ink roll every parts of uniform contact requirements, can completely scraping ink.

. in ink cleaning, in order to completely and cleanly removed all rollers on the accumulation of ink and ink traces, the best from the inking upper member, in close proximity to the ink fountain roller pouring spreading gasoline, so that waste ink cleaning Yan will from the upper part of the rubber blade into receiving the ink trough, after a period of time cleaning, will be able to ink roller wash clean.

3. Inking unit roller and the cleaning of monlchamus tuhung clean, wipe clean, with a clean, soft, clean and free of fiber fluffy and absorbent cloth to clean up.

4 clean wash ink mechanism of scraping the installation location must be accurate, between the rubber blade and string of ink roll surface to maintain equal distance and the same contact pressure.

5. Clean up after, take the cloth to steady wipe speed faster, offset printing machine in the operation of the refrain from let wipe involved in roller.

6 wash ink color change requires the operator from the upper roller and poured gasoline, keep evenly cut, do not make the splash of gasoline.

7 workshop is strictly prohibited smoking and open flame, to prevent the occurrence of fire when ink change.

The operation state of 8 offset press, the roller must Caution! Scrub.

Beware the cuffs of the coat, hands and clothes, roller or roller is involved, causing harm.

II the operator working jacket suit pocket ban carry a ruler box, keys, coins, pencils, pens, and other hard objects and ink shovel and repair machine tools, to prevent them from falling into the roller caused the accident.

9 wash ink change color under normal circumstances there are two cases, one is the light color ink for dark ink, the other is a dark ink for light color ink.

Method for changing light color ink to dark ink

Light colored ink in dark ink is relatively easy for cleaning roller corresponding also saves time and labor. First to use shovel black ink, light ink shovel out, as long as ink scraper for cleaning clean rollers on light colored ink, while cleaning up the legacy on the rollers on the cushioned, lint and other debris.

Color ink for light color ink

Offset printing ink color change and dark ink for light colored ink. At this time for roller cleaning requirements higher, cleaning more difficult, the roller clean a higher degree. It requires light coloured ink cannot be dark ink stained dirty, if cleaning rollers on the old ink is not completely clean will affect the color and hue is not accurate, light coloured ink will ink dark shadow, therefore, must be on the ink fountain and ink roller and an ink scraper, such as washed clean, then the ink shovel will be on color ink coating roller, start offset printing machine, let rollers are uniformly stuck on the color of ink, and then poured gasoline to wash off. If you do not clean enough, can also be repeated until the roller clean.