Keqi SJ-600S3 triangle labeling platform is a dedicated automatic machine exclusively developed for folding carton triangular corner labeling, with complete five-section mechanical structure bringing prominent structural, precision and efficiency advantages for packaging factories. The feeding section adopts mature friction feeding design fitted with 8 thickened high-strength belts, professional paper cutting knife and electric stacking vibration device. All mechanical adjustment knobs are simplified and user-friendly, greatly shortening calibration and mold change time during order switching, and ensuring stable, smooth delivery of small-size thin cartons as tiny as 25×8mm without jamming or double feeding.

Equipped with multi-roller independent correction unit, the machine eliminates feeding deviation of slightly warped paper blanks and maintains fixed labeling accuracy of ±2mm, which guarantees neat and aligned triangular labels on box corners. Its core labeling station uses professional air-pressure labeling technology customized for triangular label tapes; it supports both rotary and direct labeling modes, and runs without scratching or denting printed carton surfaces even at full production speed. Customers can install 1–2 labeling heads flexibly, compatible with triangular tapes ranging from 45mm to 90mm, and supports dual-sided tape labeling as an extra function to expand production capacity.

The human-machine touch control system stores multiple groups of product parameter data, enabling one-click recall for different box sizes and label specifications to cut repeated debugging work. The receiving section provides two collection modes: stacking or continuous inline conveying, matched with high-precision photoelectric counters for automatic electronic counting to simplify production statistics. With three adjustable speed grades up to 100m/min for different labeling processes, the whole machine runs stably with total weight 800kg and compact floor space of 1600×5400mm. One unit replaces 2–3 manual labeling workers, cutting long-term labor cost, and all size specifications can be customized to meet unique customer packaging demands.

SJ-600S3 triangle labeling equipment is a professional automatic labeling solution specially designed for folding cartons requiring triangular corner labels, covering small, medium-sized printed packaging products with clear size adaptability ranging from mini 25×8mm blanks to maximum 550×600mm folding boxes. Its core target application is all folding cartons that need triangular anti-counterfeit labels, sealing corner tapes and decorative triangle stickers, which are widely adopted in cosmetic packaging, small daily commodity boxes, medicine folding cartons and lightweight gift packaging.

It perfectly matches thin laminated paper, coated art paper and lightweight corrugated folding boxes under 2mm thickness, with air-pressure labeling technology protecting delicate printed surfaces from scratches or indentations during high-speed production. The machine supports three working speed modes for different processes: rotary triangular labeling runs at 25m/min, direct triangle labeling reaches 40m/min, and double-sided tape labeling hits 100m/min, adapting to both low-speed high-precision small-batch custom orders and fast mass standardized packaging lines.

The equipment can work as an independent offline unit or connect inline after folder gluers, die-cutting machines and window patching machines to finish corner labeling in one continuous workflow. It accepts triangular label sizes from 45mm to 90mm, with customizable tape width from 5mm to 100mm to match various brand packaging design standards. Besides standard folding boxes, it fits small paper envelopes, mini craft packaging and thin retail outer cartons that require corner triangle labeling. It serves small custom packaging workshops and medium-scale printing factories alike, covering all post-printing procedures with triangular corner labeling demands, and oversized box frames can be customized for special large-format packaging production.