A technical programme for an automatic 9-head rotary OPP hot melt labeling machine has been released, targeting high-speed wrap-around labeling for plastic bottles, glass bottles and metal cans in the beverage, medical and food industries.
The machine is designed for cylindrical containers such as round, square and flat bottles, with square and flat bottles requiring customization. It is suitable for wrap-around labeling with OPP film, pearlized film, paper-plastic composite film and paper labels. Because non-shrinkable materials are used, printed label patterns are not deformed, helping maintain packaging appearance while reducing packaging material costs.
The system adopts PLC control for simple operation and stable, reliable running. It is equipped with a high-precision intelligent deviation correction system to ensure a precise overlap fit. A synchronous gear transmission system, together with a feed screw and star wheels for bottle infeed and outfeed, supports smooth and stable high-speed operation. Spindle lifting is fully electrically controlled by a motor, improving changeover efficiency when switching bottle types. Both infeed and outfeed are monitored; the machine can automatically adjust main unit speed according to the number of bottles on the conveyor, and a bottle-falling detection function can automatically cut off bottle-type input if a bottle falls.
The labeling process runs as follows: bottle feeding, positioning, label cutting, label suction, gluing, labeling, label holding and bottle outfeed. The advanced label feeding system uses high-speed servo motors and drivers to ensure accuracy and stability in high-speed label feeding and cutting, and is equipped with color mark sensors for continuous and stable labeling.
The gluing protection design includes an automatic glue identification device. When the sensor cannot detect a label, the gluing device automatically exits the working state to prevent problems caused by the label not being on the drum station. A baffle is also set to prevent labels from rolling into the rubber roller when a label is detected entering the roller. The glue storage box and return section are fitted with quickly removable filter devices to prevent impurities from entering the glue pump and causing blockages. A missing-label protection sensor is added at the label drum position to reduce downtime and improve stability.
Key specifications include a label height range of 30–120 mm; labeling height compatible with 70 mm from 5 mm above the bottle bottom; bottle diameter in the labeling area of 45–100 mm in double-blade mode; compatible bottle height difference within 150 mm; power supply of three-phase 380V/50Hz/16kW; main unit dimensions of 1,600 × 2,180 × 2,000 mm; weight of 2,200 kg; working platform height of 1,000 ± 50 mm, customizable; labeling speed of 9,000–14,000 bottles per hour depending on bottle size; labeling accuracy of ±1 mm; and label materials including pearlized film and OPP labels with inner diameters of 76/152 mm. Adjustment parts are motor-driven and can be operated via touch screen, and hardware change parts adopt quick-release structures for short bottle-type changeover times.
Safety and testing functions include protective doors during operation, lack-of-label alarm, lack-of-bottle alarm with automatic restart once bottles are restored, labeling leak alarm, and pressure, vacuum and temperature testing that stops the machine when requirements are not met to prevent defective products.
The technical programme also outlines after-sales support, including installation and commissioning, operator training, periodic service inspections, emergency response within 48 hours after receiving a maintenance report, excluding force majeure, and sufficient spare-parts inventory for rapid replacement supply.
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Parc industriel A2 Dongjiu, 30 East Jintang Road, Tangshi, Zhangjiagang, Jiangsu 215600, Chine
