Finishing Waste
Mechanical waste generated during the high-speed folding and gluing phase of carton manufacturing represents a primary efficiency metric for finishing departments. This loss, known as folder-gluer scrappage, occurs when cartons fail to align, glue, or fold correctly as they pass through the finishing line and must be discarded. It directly impacts the net yield of a production run and increases the total volume of board that must be recycled as broke.
Minimizing this waste requires precise machine setups and consistent board properties.
Machine Adjustment
Speed fluctuations and feeder errors during the startup of the finishing line account for the majority of folded board rejects. To establish correct folder-gluer scrappage baselines, operators must run initial test blanks through the multi-stage folding sections to align the belt speeds and glue nozzles. Inadequate control of the adhesive application rate or incorrect pressure on the compression belts results in misaligned or unglued cartons.
These rejected blanks are automatically ejected from the stream, preventing them from reaching the packing station.
Material Property
Sheet flatness and creasing quality play a decisive role in preventing machine jams. Board that exhibits warp or inconsistent stiffness will not feed reliably, leading to double-feeds or multi-carton blockages in the folding hooks. These incidents force line stoppages and necessitate manual clearing of the system.
