MAINTENANCE OF FLEXO PRINTERS - MAINTENANCE OF THE ALUMINUM ROLLER
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The printing market is developing day by day, the printing technology is improved and advanced, and the roughing batch is increasingly improved. The cavities on the roller become smoother and shallower so that the bowl dries faster. The introduction of an increasingly high ink quality and ink metering system ensures better dispersion print quality for clear print intensity and quality from the shallower coarse sinuses. Caution should be exercised if the incorrect ink formulation is used, the possibility that large color molecules will clog the sinuses.
1.The purpose of cleaning flexo printer roughness regularly
Laser-etched or chromium-plated abrasives need to be cleaned regularly. The regular cleaning will help prolong the life of melasma. Sanding rollers are brushed with a specific brush with specified detergent solution. Use soft bristle brushes to clean the chrome-plated abrasives, while with laser-etched ceramic-coated abrasives, a fine stainless steel brush should be used.
2. Choose the right type of cleaner and how to clean the abrasive
Carefully choose different types of bleaching solutions. It is necessary to consult the ink supplier, roller supplier to choose the type of cleaning solution. Use of bleach with a high pH is not warranted by the roller supplier.
The abrasive roller should be cleaned as often as possible at least once in a while, not less than once a day or once per shift.
Roller cleaning must be followed every time the machine is stopped waiting. If the roller is clogged with ink, a cleaning method such as pressure washing or ultrasonic cleaning must be performed.
Must be cleaned while the ink is still wet and in liquid state. This will reduce cleaning time and make it easier to perform. The ink that dries out will be harder to remove, and the amount of ink left behind can be difficult to clean completely.
Must be cleaned while the ink is still wet and in liquid state. This will reduce cleaning time and make the job easier. Dried ink will be difficult to remove from the base of the sinuses and cured ink will be difficult to pop out.
Maintenance program needs to be implemented and discussed with the Roller supplier to ensure maximum efficiency and lifetime of the roller. Many roller suppliers even sell cleaning solutions.
3.The cleaning method of the rough batch
If the pressure cleaning method is used, an operator training program should be developed.
Some pressure washers have vacuum systems and automatic cross-stroke scanners where detergents such as soda bicarbonate are applied to the surface of the roller and are immediately purged. This system is calibrated for horizontal travel speed and pressure. Other systems have hand-calibrated scanners and the manufacturer of those handheld scanners indicated that it is necessary to move the traverse traverse around the roller at 12 inches per second. Slower movement may damage the rough roller surface.
There are also ultrasonic cleaning machines for soaking trays and other cleaning systems for floating printers.The ultrasonic cleaning devices are great for cleaning high-sugar, but already-covered, abrasive rollers. there is evidence that they can damage the sinus structure. So when using ultrasonic cleaning equipment, be very careful.
Since the cleaning of the rough rollers is essential to the longevity of the rollers, thorough discussion and confirmation of the roller supplier should be made regarding the cleaning method and system. Regardless of the roller, the ink should not dry out in the sinuses. The ink flow through the rollers must be maintained when the trough stops or roller cleaning should be performed immediately. Sanitation supplies must be specified by the ink supplier.
In the cleaning phase, solvent-based inks are easier to remove than water-based inks. Solvent-based inks not only can wait longer before being rinsed, but also have the ability to dissolve in a wider solution of solvents mixed with less crankshaft grease.
Water-based inks should be rinsed immediately
Can use the following mixture
10% - 20% Soft Alkali (no ammonia)
60% - 70% water
20% solvent (need propyl or other propyl derivative)
Excessive alkali and amine can pitting the chrome-plated cylinders and should therefore not be used. After cleaning, let the water be exhausted or it will cause problems in the next refills in the cylinder.
Many inks are not identical, so when converting inks for printing to another product, cleaning must be done.
