What Happens After Digital Printing? Slotting, Die-Cutting and Lamination on the Box Line

Many converters evaluating a digital corrugated press focus on the printing itself: print width, speed, resolution in dpi. But the press is only one link in the line. Printed sheets still have to be slotted, die-cut or cut, and some finished boxes need laminating. How smoothly these downstream steps connect determines whether digital throughput actually shows up in finished boxes. This article walks through the converting logic, based on the actual configurations of the Ruisheng press range.

Can Sheets Go Straight to the Stack? It Starts with Drying

The first question in any downstream plan is what state the printed board is in. Scanning presses run water-based ink that dries during transport, so the ink film is stable before stacking: the RS2500-E8 process sequence is print, dry, stack, and stacked sheets move straight to the next operation. The paperboard-oriented RS1900-E16 adds front and bottom drying — ink dries at speed, which reduces set-off when stacking and stabilises the ink layer before lamination. A delivery stacker keeps boards neatly stacked, cutting manual handling and double moves.

Slotting and Die-Cutting: Straight from the Delivery

For corrugated boxes, the two core converting steps after printing are slotting and die-cutting. RS2500-E8 sheets can go directly into slotting or die-cutting after stacking, with no extra waiting or treatment in between. Web stability is the precondition for registration: the series uses an in-house feed belt with fully automatic correction, so 2,500 mm (98.4 in) board runs straight and long-image seams stay aligned — the same foundation die-cutting registration relies on.

On thickness, both the RS1800-HPA3 and the RS2500 series handle 3–40 mm (0.12–1.57 in) corrugated board, covering common single-wall through double-wall grades. Heavy board close to the thickness limit should be confirmed with a sample run before you schedule production.

When Do You Need Lamination? Match Ink to the Supply Chain

Water-based ink is less water- and abrasion-resistant than UV ink on board. If finished boxes will circulate in humid conditions or take repeated surface rubbing, there are two routes: choose a UV-ink model such as the RS2500-E20UV (90 m²/min, about 968 sq ft/min) or the RS2500-R16UV with UV spot colour; or add a lamination step downstream. On the RS1900-E16, the laminating module engages on demand to add rub and moisture resistance, and you can print and output directly when it is not needed.

One more ink detail: the RS2500 series offers both water-based dye and water-based pigment ink. Dye gives vivid colour at lower cost; pigment holds up better against water and light. Choose by the environment your boxes will travel through, not by colour alone.

If You Want to Remove the Handling Too: Print, Laminate and Cut in One Line

In a conventional workflow, printing, laminating and die-cutting are three separate machines, and work in progress travels between them. The RS1900-E16 combines the three on one line: board in, finished piece out. It prints 1.9 m (74.8 in) wide, with laminating and cutting units at 1.6 m (63 in), so printed sheets feed straight into the finishing units. Note that it is designed for grey-back board, white card, coated paper and art paper — for corrugated board, the RS1800 and RS2500 series with separate converting steps remain the right answer.

A Checklist for Line Planning

• Format matching: confirm the flat size of your main box styles, then check that print width (900 mm / 1,200 mm / 2,500 mm, i.e. 35.4 / 47.2 / 98.4 in) lines up with the working width of your converting equipment; on the all-in-one line, laminating and cutting cap finished width at 1.6 m (63 in).
• Ink and logistics: for humid or high-rub supply chains, lean towards UV models or add lamination.
• Heavy and unusual board: near the 40 mm (1.57 in) thickness limit, or for special stocks, send samples before fixing the configuration.
• Site requirements: wide-format presses are heavy — the RS2500-E8 weighs about 5,000 kg (11,023 lb) and needs roughly 4.9 × 3.0 m (16.1 × 9.8 ft) of floor. Confirm floor loading and three-phase power before installation.

There is no universal answer for downstream integration — it depends on your box styles, ink system and existing layout. Send your regular stocks, including the thinnest and thickest grammages, for a sample run, and fix the configuration against the actual print. For machine configurations and quotations, contact a Ruisheng consultant.