Anilox roll

Anilox roll—an engraved cylinder which transfers from inking rollers to the printing plate on a flexographic unit. 

The coating sol is deposited on a doctor roll by a sol dispenser and is transferred from there to an anilox roll with small cavities. From this roll, the sol is transported to the printing... 

The trial runs were performed on a bare roll corona treatment system as well as on an atmospheric plasma treatment system, resident at the same pilot line. For all runs, two PVdC-coated polyester films were post-treated, one in the APT system with a helium/oxygen plasma, the other by means of a corona treater. Another sample constituted the control reference and was not treated. The samples were then printed at 90 mpm on a PCMC press with aqueous ink (Flint Ink) using a laser-engraved anilox roll to 300 lines per inch (Ipi) and a cell volume of 4.8 billion cubic microns (bcm)/sq.in. The printed image provided solid (100%) ink coverage. The calculated ink transfer (thickness) to the film, based upon this cell volume, was approximately 1.9 microns. The printed web drying temperature occurred at 121 °C, with a web temperature of 77 °C. 

Because water-borne inks involve specihc color densihes relative to the flexographic printing process, so too must UV hexo inks. Hence, to obtain the same color density as water-borne inks, the anilox roll must deliver approximately 35% less in the form of UV flexo inks to the substrate at a specihc viscosity for efficient ink transfer to the substrate. Generally, UV hexo inks have viscosihes in the range... 

Coating thickness limitations are inherently defined by the flexographic process. When engraved anilox rolls transfer coatings to printing plates and in turn to substrates, the process rarely delivers less than 19% or more than 24% of the cell s wet coating content to the substrate surface [3]. There are therefore clear boundaries as to the amount of coating that can be delivered to a substrate surface. These boundaries are defined in Table 9.2. 

A flexo ink is a low viscosity (fluid ink) suitable for transfer from an ink fountain via anilox roll to the plate cyhnder and substrate. It dries by evaporation of the solvent (water). Most presses are equipped with air circulating dryers. A flexo ink is comprised of low boiling point solvents for low temperature evaporation and fast drying. 

Gravure Reverse roll Slot die Rotary screen Flexographic/anilox Silk screen Nanocoating... 

An ink fountain roll (rubber). The fountain roll rotates in a reservoir of ink and transfers a large volume of ink to the anilox roU. 

---