Six-Axis Servo Synchronous Wrapping Machine Solves Position Offset Defects of Chocolate Bar High-Speed Production

Tablet chocolate and long chocolate bars have fixed rectangular outlines, requiring precise feeding, foil conveying and folding alignment during foil wrapping. Traditional single-motor linkage wrapping machines adopt rigid cam transmission, with no independent speed adjustment for each conveying unit. After continuous operation over 8 hours, mechanical clearance superposes cumulative positioning errors, leading to offset wrapping, uneven foil folding and misaligned sealing edges. For export chocolate batches with unified packaging appearance standards, positioning deviation will directly trigger inspection rejection at customs and third-party food testing institutions. This article analyzes parameterized servo synchronous solutions targeting positioning deviation pain points of chocolate bar wrapping production lines.

Ordinary wrapping machines rely on one main motor to drive feeding, foil pulling and folding mechanisms simultaneously. The transmission gap of gears and chains accumulates with the increase of wrapping batches. When the production speed exceeds 180pcs/min, tiny displacement errors of chocolate bars will be amplified, resulting in irregular foil folding and asymmetric packaging outlines. The mechanical synchronization error of single-motor equipment can reach 0.8–1.2mm after long-term operation.

Standard low-cost wrapping machines only set fixed mechanical positioning blocks, without photoelectric sensing feedback units. Once chocolate bar dimensional tolerance fluctuates within ±0.5mm, the equipment cannot adjust the feeding position dynamically, and batch wrapping positioning consistency cannot be maintained.

Standardized chocolate bar wrapping machines adopt six independent servo motors to separately control feeding conveyor, foil unwinding, folding jaw, sealing and cutting units. The system locks the synchronization error within ≤0.1mm via PLC program linkage, eliminating cumulative mechanical clearance errors under continuous 250pcs/min high-speed operation. The equipment supports independent speed parameter adjustment for each unit to match chocolate bars of different lengths (10–80mm).

Two sets of German SICK photoelectric sensors are installed at the foil feeding and product feeding stations. The sensors capture chocolate bar position and foil color mark signals in real time, and the servo system completes dynamic position compensation within 0.02s. The structure adapts to regular rectangular chocolate bars without manual repeated calibration during batch switching.

Enterprises undertaking long-term cross-border chocolate bar orders shall prioritize wrapping machines with multi-servo synchronous control and dual photoelectric correction functions. Before equipment procurement, verify core parameters including servo synchronization error, effective wrapping size range and maximum stable operating speed to avoid batch packaging appearance defects caused by mechanical positioning deviation.

Position offset during chocolate bar high-speed wrapping mainly originates from single-motor rigid transmission and missing real-time correction mechanisms. Six-axis distributed servo synchronous wrapping machines rely on quantifiable synchronization error indexes and photoelectric dynamic calibration technology to stabilize wrapping positioning accuracy, meet unified packaging appearance standards for export food, and support long-term continuous standardized production of chocolate bar products.