Cartoning Machines

Cartons are available in a variety of styles, shapes and sizes. They will generally be of board stock but may sometimes be made from plastic sheet or corrugated.

The basic carton is made at the converter by folding a die-cut piece of board into a four-sided tube glued together at the manufacturer's joint. Some packagers running large format, high-speed or high-volume lines may dispense with pre-folded cartons and have their cartons supplied in unglued, die-cut and scored blanks. These flat blanks are much more efficient from a shipping and handling standpoint. On the packaging line, a carton former erects the cartons and delivers them to the cartoning machine (for product loading) as if they had come folded from the converter.

There are also cartoning machines available that wrap the carton blank around the product forming the carton in the machine at the point of packaging.

Some carton design have flaps on only one end, leaving the other end open, but cartons are usually closed at both ends. Flaps may be either tucked or glued. If tucked, there are three flaps, two minors and a major. The minor Flaps  are folded over the carton end. The major flap has a tab that is tucked into the carton as it is folded in. In some instances, a locking tab is die-cut into the body of the carton.

This tab is designed to fold over and into a slot on the tucked major flap, this locking tab helps the major flap remain closed  on cartons where the flap is long or where the product may try to force the end flap open.

Glue cartons are similar except there are two major flaps. After folding the minors, the inner major flap is folded, glue is applied and the outer major flap folded down on top.

Another important variation is the automatic bottom carton. These cartons have one end folded and glued closed in a special folded in a format. As the carton is erected, the blank unfolds, forming the carton with finished base automatically. No additional tucking or gluing is required. Automatic bottoms are usually used as an aid to manual erection and packaging but, may occasionally be used with automated cartoners. Automatic bottom cartons may be erected automatically on many standard cartoning machines by moving the gluing and folding guides out of the way or removing them.

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  • Vijay Kumar
    Vijay Kumar

    Cartoner or Case Packer, sometimes the terminology is confusing and not used correctly, just sharing this article, it should be of some help... http://www.triplemexpo.com/news/cartoner/

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