O que é uma coladora dobradora flexográfica e como ela funciona nas embalagens?

2026-07-08 15:39:43

A flexo folder gluer, often abbreviated as FFG, is a central piece of converting equipment in the corrugated packaging industry. It is an inline machine that transforms flat corrugated boards into finished shipping boxes by combining printing, slotting, creasing, folding, and gluing within a single continuous production line. This integrated approach replaces several standalone processes and is widely used to manufacture regular slotted cases and other box styles for e‑commerce, food, pharmaceutical, and retail packaging.

Definition and Role in Packaging

The basic purpose of a flexo folder gluer is to produce boxes from sheets of corrugated board in one pass. It feeds and flexo prints the board in several colors, then die‑cuts or slots, folds, and glues it to create a completed container ready for stacking. For packaging factories, this equipment improves production speed and reduces manual handling between separate processes, while maintaining print position, slotting accuracy, glue line strength, and final box squareness. A high‑speed flexo folder gluer can produce 250–400 boxes per minute depending on box size and board quality.

Main Working Process

The operation of a flexo folder gluer follows a linked sequence of stations:

Feeding: The feeder stacks and squares incoming board, then introduces it at required speed using lead‑edge or vacuum systems to avoid misalignment.

Flexo printing: One or more print units apply water‑based ink through anilox rollers, doctor blades, plate cylinders, and impression cylinders; driers may be installed between colors.

Creasing and slotting: Rotary tools cut slots for flaps and score folding lines, allowing formation of panels and glue tabs, with accuracy around ±1–2 mm.

Folding: Folding rails or swords fold the board along creases so panels meet centrally; synchronization prevents defects like fishtailing.

Gluing: Adhesive is applied to the joining edge via wheel or extrusion system, typically using 1–3 grams of cold glue per box.

Counting and output: A counter‑ejector stacks finished boxes in set quantities for strapping or palletizing.

By carrying out these steps inline, users gain a simplified supply chain, less waste and energy use, and faster time‑to‑market.

Key Components

A typical FFG includes a feeder, several flexographic print units (each with anilox roller, chambered doctor blade, plate cylinder, and impression cylinder), creasing/slotting or die‑cut units, a folder‑gluer section with adhesive application, and an optional counter‑ejector. Modern print units use independent servo motors for real‑time registration control even at 300 sheets per minute. Quick‑change folding rails and automated knife positioning reduce order changeover to under five minutes.

Advantages in Packaging

The flexo folder gluer offers high‑speed production, precision, reduced labor cost, and versatility across straight‑line, crash‑lock, and multi‑corner designs. Its eco‑friendly water‑based inks and optimized material usage lower waste. By merging printing, slotting, and gluing, it cuts touch points where errors and damage occur.

Conclusion

In packaging, a flexo folder gluer is the engine that converts corrugated sheets into printed, folded, and glued cartons through one connected line. Its working principle—feed, print, slot, fold, glue, count—delivers the efficiency and consistency required by modern box manufacturers worldwide.