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Flexographic
Gravure Flexographic Lamination Converting Engineering

 

[In allestimento]

                 

Conventional flexo                                                      Close chamber inking system

 

Flexography (often abbreviated to flexo) is a form of printing process which utilizes a flexible relief plate. It is essentially a modern version of letterpress which can be used for printing on almost any type of substrate, including plastic, metallic films, cellophane, paper and cardboard. 

It is widely used for printing on the non-porous substrates required for various types of food packaging and shoppers (source wikipedia)

There are three different flexographic machine configurations.

In line
Stack 
Common Central Impression or central drum

In line configuration the print unit follolow one after each other in the horizontal way, widely used in the self adhesive labels, shrink sleeves etc. thanks to the possibility to have "in line" different options like other printing methods as:

Offset
Screen 
Rotogravure

or finishing processes as:

Peal  seal
Hot or cold foil stamping
Embossing
Creasing
Die cutting
Slitting

Stack configuration the print units are one in top of each others normaly 2, 3 or 4 on each side of a tower , each printing unit has an individual counter cylinder (impression) mostly used for PE shoppers printing, paper bags

Central Impression or Central Drum same as Stack which instead of individual impression cylinder has a high diameter drum as  common impression cylinder surely the most used system used in the food packiging printing of thin and extensible films like thin PE .

The wrapping of the material around the drum avoid its alongation during the process and guarantee perfect color registation.

All the configurations can be gear driven or eletronic shaft driven (Gear less) thus enalble the infinitesimal print repeat without  gear pitch limitation.

TYPICAL MACHINES LAY-OUT

In line 

 

Stack

 

Central Impression or Central Drum 

Like in gravure also also in the  flexographic printing process it is possible to use different kind of inks like:

Solvent base
Water base
U.V. 
E.B. 
LED 
 

 

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Aggiornato il: 30 marzo 2014