DIFFERENT KINDS OF FLEXOGRAPHIC PRINTING UNITS APPLICATED TO NAPKINS MACHINERY
Standard flexographic printing units. Interchangeable
sleeve. Racla and closed environment. Central drum... What to chose? How to do
to get the best productivity?
Who produces printed napkins needs a good printing
quality (neatness, steady tonality, steady register) goes at the same speed with
the searching of max flexibility: you often have to produce such a small
quantity that it takes more to arrange the machine than to make the napkins.
In order of general quality printing and particularly a
good register or printing, the "central drum" system (paper to print
pass between each cliché-cylinder and the main central cylinder) is
definitely the best.Also the "racla"
system (wich also permits you to save some ink) gives to you high results,
specially if it works with a stroboscopic process control.
Versatility matters were solved in different ways:
- to use flexo printing groups with "sleeve" clichés: clichés
are pipes made in polymeric material, which you have to to put around suitable
hollow cylinders (you often open them from the structure as they were a door).
- to use flexo printing groups with -at less - 3-4
ink-stations: one ofthem will always host (for instance) blue ink, another one
red ink, anothe the red ink, and so on. Like this, you will spend time anyway to
place clichés, but you will neve have to clean printing equipments from old ink
that you cannot use anymore.
come back to the "technical matters" list
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