Industrial Double-Sided Round Bottle Labeling Machine

The DBL-Series Double-Sided Round Bottle Labeling Machine applies pressure-sensitive self-adhesive labels to the front and back (or continuous wrap-around) of cylindrical containers in a single pass. Managed via a PLC control architecture paired with closed-loop servo motors, this system maintains a dispensing accuracy of +/- 1 mm at continuous line speeds up to 200 bottles/minute.

Technical Specifications

Parameter	Specification Details
Container Diameter Range	Dia 30 mm - Dia 120 mm (Quick-adjust star wheels available)
Label Roll Dimensions	Inner core: Dia 76 mm, Outer diameter: Max Dia 350 mm
Labeling Accuracy	+/- 1 mm (Dependent on container and label stock tolerance)
Labeling Speed	40 - 200 BPM (Bottles Per Minute)
Control Architecture	Siemens S7-1200 / Allen-Bradley Micro850 PLC + HMI Touch Screen
Dispensing Actuation	Panasonic / Schneider Servo Motor System
Utility Requirements	AC 220V, 50/60Hz, 1.5 kW / 0.4 - 0.6 MPa clean dry air
Footprint Dimensions	2400 mm (L) x 1300 mm (W) x 1450 mm (H)

Core Engineering & Mechanical Build

Structural Frame: Fabricated from 4 mm thick SUS304 stainless steel plates and anodized structural aluminum extrusion, engineered to eliminate harmonic vibration during high-speed indexing.

Synchronous Three-Roller Alignment Mechanism: Employs a mechanical correction assembly that forces cylindrical containers to rotate precisely against a high-friction polyurethane wrap belt, preventing label skew and air entrapment.

Servo-Driven Peeling Heads: Features independent stepper or servo drives for the pealing edges, delivering instantaneous torque response to eliminate web breakage during aggressive start-stop cycles.

Sensor Suite: Integrated Keyence/Sick fiber optic sensors for container edge detection and ultrasonic gap sensors for transparent clear-on-clear label detection without manual calibration offset.

Compliance & Safety Standards

Built to meet global facility compliance mandates and clear rigorous vendor list (AVL) audits:

CE Compliance: Engineered to conform with the European Machinery Directive (MD), Electromagnetic Compatibility (EMC), and Low Voltage Directive (LVD).

UL 508A Electrical Panels: Control enclosures wired to UL 508A industrial control panel standards, utilizing UL-listed breakers, contactors, and terminal blocks for North American installations.

Safety Interlocking: Polycarbonate guarding equipped with Category 3 safety interlock switches, instantly cutting power to servo drives and pneumatic actuators upon door opening.

Manufacturing, Inspection & QA Workflow

Material Prep: Raw aluminum stock undergoes CNC milling and CMM dimensional verification prior to anodizing. Stainless steel sheets are laser-cut and passivated.

Sub-Assembly Burn-In: PLC motherboards, HMI units, and servo drives undergo a 72-hour continuous thermal burn-in test before final cabinet integration.

Factory Acceptance Testing (FAT): Every assembled machine runs a 4-hour continuous test loop utilizing client-supplied sample containers and actual label stock to verify tension stability and placement repeatability.

Documentation & Traceability: Electrical schematics, PLC program backups, and Material Mill Test Certificates (MTC) for structural stainless steel are archived and shipped with the machine manual.

Line Integration & Custom Options

Coding Integration: Provisions for Thermal Transfer Overprinters (TTO) or Continuous Inkjet (CIJ) printers to print lot codes and expiration dates directly onto the web prior to dispensing.

Vision Inspection Systems: Optional missing-label, missing-print, or OCR verification cameras paired with an automated pneumatic rejection pusher.

Line Handshake: Modbus TCP/IP or Ethernet/IP communication protocols for upstream/downstream buffer tracking and Emergency Stop (E-Stop) circuit integration.

Frequently Asked Questions

Q: How does the machine handle transparent clear-on-clear labels?

A: The system utilizes an ultrasonic label gap sensor instead of standard optical eyes. This sensor detects the density differential between the liner backing and the adhesive label material, ensuring accurate dispensing for clear BOPP or PET stock.

Q: What is the average time required for a complete format changeover?

A: A tool-less size changeover (adjusting guide rails, top hold-down belt height, and peal plate angle) takes 15 - 20 minutes for an experienced operator. Swapping out custom-pitch star wheels or worm screws (if specified for unique container geometry) requires an additional 10 minutes.

Q: Can this machine integrate with an existing filling and capping line?

A: Yes. The machine operates on an inline pass-through basis with adjustable conveyor speeds. Dry-contact signal inputs and outputs allow connection to upstream accumulation tables and downstream checkweighers.

Q: What utilities are required on-site?

A: The unit requires a single-phase AC 220V power supply (15A circuit) and a compressed air line delivering clean, dry air at 0.4 - 0.6 MPa for pneumatic components and rejection modules.

Q: What is your standard warranty and spare parts policy?

A: We provide a 12-month limited warranty covering all non-consumable mechanical and electrical parts (PLC, servo motors, drives). Critical wear components (drive belts, rubber rollers) are stocked locally for dispatch within 48 hours.