Digital Label Press

Overview

A digital label press prints pressure-sensitive label stock roll-to-roll with no printing plates or cylinders, so every job, including variable data and short runs, images directly from the digital file. This machine is a UV inkjet press: five fixed piezo printbars jet CMYK plus opaque white onto the moving web, UV LEDs cure the ink instantly, and an inline finishing module laminates, die-cuts, and rewinds the result in one pass.

The whole line sits on a Machine Frame & Guarding that locates each module on a common datum, and is coordinated by the Control & Electronics electronics, where a DFE/RIP server rasterises jobs and streams pixel data to the heads while a machine controller sequences the axes.

How it works

The Unwind Module pays off the substrate reel under closed-loop tension, smooths it through a dancer, and corona-treats the surface so ink wets and adheres. The Web Transport then pulls the web through the press at a constant, registered speed on servo-driven nip rollers, held straight by an edge guide.

At the heart of the press, the Inkjet Print Engine carries five page-wide printbars of stitched piezo heads, each fed by a recirculating ink supply that degasses and pressure-controls its color and kept healthy by a capping and purge maintenance station. Immediately after each color, the UV LED Cure Module module pins the ink with UV LED arrays and gives a final full cure, while the Primer & Varnish Coater can prime the stock ahead of printing or lay a protective varnish over the image.

The Vision Inspection station line-scans every label against the reference image to catch defects, missing nozzles, and registration drift. Finally the Finishing Module module laminates, semi-rotary die-cuts the label shapes, strips the matrix, and winds the finished roll under tension.