A unified eye-through coil packing machine wraps wire, slit steel, and plastic pipe coils by positioning the coil upright on motorized support rollers while an orbital shuttle ring passes wrapping media through the coil’s center eye. This radial-through-eye wrapping method delivers 360° sealed encapsulation against atmospheric corrosion, edge impact, and layer shifting during transit. Operating parameters—including ring rotation speed, roller drive ratios, tension levels, and total wrap counts—are tailored to specific coil dimensions and material characteristics.
Visão geral
The eye-through orbital wrapping system automates protective packaging for open-eye cylindrical loads across metallurgical and polymer manufacturing operations. By synchronizing the rotation of the workpiece on twin polyurethane-coated drive rollers with the continuous rotation of an orbital ring through the inner aperture, the machine applies a uniform helical layer of stretch film, woven plastic tape, or VCI paper.
This mechanical layout eliminates the labor hazards of manual eye-through threading while establishing continuous structural containment across the entire annular core.
Como funciona a máquina de embalagem de bobinas
The eye-through orbital packaging process secures loose outer wraps and shields internal and external circumferences through coordinated dual-axis kinematics:
- Upright Coil Placement: The coil is transferred in a vertical (eye-horizontal) orientation onto dual floor-level support rollers. These rollers feature heavy-duty polyurethane (PU) wear sleeves to prevent scuffing on delicate outer surfaces while maintaining frictional traction without slippage.
- Ring Alignment and Penetration: The C-type or closed orbital shuttle ring—mounted on an adjustable structural frame—aligns its operational trajectory through the central core (eye) of the coil.
- Dual-Axis Synchronized Wrapping: As the rotating ring carries the material shuttle through the coil’s inner diameter, the base drive rollers rotate the coil around its horizontal centerline. The coordinated velocity ratio between ring rotation (RPM) and roller turning speed (m/min) determines the precise helical pitch and surface overlap.
- Tensioned Film Application: Wrapping material feeds through a mechanical friction brake or pneumatic pre-stretch tensioning mast, generating steady radial containment force without crushing hollow cores or tearing over sharp metallic edges.
- Cut and Discharge Cycle: Upon reaching the pre-set rotational wrap count, the motion halts automatically for film cutting and trailing-edge clamping, allowing the fully encapsulated coil to exit via hoist, crane, or automated roller conveyor.
[ Orbital Ring Rotation (公转) ]
╭───────╮
▼ │ ▲ │ ▼
┌────────────┼───┼───┼────────────┐
│ Film Spool │ │ │ Material │
└────────────┼───┼───┼────────────┘
│ │ │
Coil │ ┌─┴─┐ │ Coil
Wall │ │Eye│ │ Wall
│ └─┬─┘ │
┌────────────┴───┼───┴────────────┐
│ [ Polyurethane Roller ] │
│ (Coil Rotation 自转) │
└─────────────────────────────────┘Wire, Steel, and Pipe Coils: Protection Matrix
A single orbital wrapping station accommodates distinct industrial coils by adjusting packaging tension, carrier media, and overlap percentages to address material-specific failure modes:
| Coil Category | Material Vulnerabilities | Função protetora primária | Recommended Packaging Media |
|---|---|---|---|
| Bobina de fio (Rod, Spring, Cable) | Loose outer wraps, spring-back hazards, surface oxidation | Radial retention to prevent turn unraveling; full environmental barrier | Crepe paper, high-tension stretch film, or woven PP tape |
| Bobina de tira de aço (Slit Coils, Cold Rolled) | Shearing damage on outer/inner corners, moisture condensation, rust | High edge-tear resistance; dynamic vapor corrosion inhibition (VCI) | VCI anti-corrosion film, composite barrier paper, heavy woven wrap |
| Bobina de tubo de plástico (HDPE, PEX, Corrugated) | UV photo-degradation, particulate entry, ovality collapse | UV barrier shielding; soft-surface binding without crushing annular walls | UV-stabilized LLDPE stretch film, co-extruded white barrier film |
A single machine accommodates all three products provided that the orbital ring’s internal clearance, roller spacing, and motor capacities cover the minimum and maximum product boundaries. Equipment selection requires matching your operational mix to ensure adequate clearance for the material dispenser throughout the entire cycle.
Envoltórios para cobertura total
Achieving continuous, weather-tight encapsulation depends on controlling the material pitch across the largest surface area: the coil Outside Diameter (OD). Because linear surface speed is greatest at the OD, film overlap is lowest at the perimeter and highest along the inner core ID.
The minimum wrap count is determined by the material strip width, the selected overlap ratio, and the coil outer perimeter:
Outside Circumference = π × OD
Advance Pitch per Turn = Film Width × (1 - Overlap Percentage)
Total Wraps Required = Outside Circumference / Advance PitchEngineering Benchmark Example
For a heavy coil measuring 600 mm de diâmetro interno × 1,000 mm de diâmetro externo, utilizando 100 mm de largura packaging media with a specified 50% de sobreposição on the exterior face:
| Métrica do parâmetro | Base de cálculo | Resultant Value |
|---|---|---|
| Circunferência externa | π × 1,000 mm | 3,142 mm |
| Per-Turn Advance Pitch (OD) | 100 mm × (1 – 0.50) | 50 mm |
| Wraps for Full OD Coverage | 3,142 mm / 50 mm | 63 envoltórios (rounded up) |
| Circunferência interna | π × 600 mm | 1,885 mm |
| Resultant Advance Pitch (ID) | 1,885 mm / 63 wraps | 30 mm |
| Resultant Overlap (ID) | [1 – (30 mm / 100 mm)] × 100% | 70% de sobreposição |
In this configuration, setting the PLC dual-drive frequency inverters to execute 63 ring cycles per single coil revolution guarantees a minimum 50% overlap across the exterior diameter, automatically yielding a reinforced 70% protective barrier through the inner eye.
Controls and Safety Integration
Industrial orbital wrapping machinery contains substantial rotating mass operating at peripheral velocities exceeding 2.5 m/s. Integrated machine safeguards prevent operator contact during operational sequences:
- Perimeter Mesh Guarding: High-visibility yellow safety enclosure prevents access to the rotating ring assembly, guide track wheels, and dispenser carriage.
- Acesso Intertravado: Service access gates are equipped with safety interlock switches (Performance Level d / Category 3 according to ISO 13849-1), enforcing complete operational shutdown upon entry.
- Zero-Speed Infeed Inhibit: System logic restricts crane or hoist loading until zero-motion feedback confirms the ring is locked at home position.
- Harmonização Regulatória: Structural architecture and safety interlocks align with ISO 12100 for basic risk assessment and EN-415 10 for industrial packaging equipment safety. Compliance documentation and CE markings are validated against specific contract configurations.
Lista de verificação de seleção técnica
To determine the frame geometry, roller configuration, and drive ratings for your facility, confirm the following application parameters:
- Envelope Dimensional da Bobina: Minimum and maximum ID, OD, axial width, and gross piece weight across every coil type.
- Cross-Sectional Clearance: Verification that
(OD - ID) / 2plus the dispenser clearance fits inside the ring opening:Ring Clearance Diameter ≥ √((Coil Width)² + (Coil Wall Thickness)²) + Dispenser Offset - Meta de rendimento: Target capacity expressed in coils per hour.
- Substratos de embalagem: Material type (LLDPE stretch film, reinforced VCI paper, woven PE/PP tape), roll width, and core diameter.
- Material Handling Interface: Coil placement method (overhead C-hook crane, jib crane with internal tong, or integrated floor conveyor).
- Pegada linear: Floor dimensions, overhead crane hooks clearance, and adjacent staging buffers.
Perguntas frequentes sobre engenharia
Can one machine wrap wire, steel strip, and plastic pipe coils interchangeably?
Yes. The machine handles mixed production runs provided that your smallest inside diameter provides sufficient passage for the orbital dispenser carriage, and your heaviest coil does not exceed the mechanical weight rating of the drive rollers.
Why is through-the-eye wrapping superior to external sleeve wrapping?
Eye-through orbital wrapping creates a unified, hoop-stress package. It physically anchors the loose outer and inner tail ends to the core structure, preventing axial layer shifting and telescoping during intermodal shipping.
How does the control system maintain uniform overlap?
Variable Frequency Drives (VFDs) regulate both the orbital ring motor and the base roller drive motor. By governing the drive speed ratio through an industrial PLC, the surface advance pitch remains constant regardless of line speed fluctuations.
How are light or flexible coils prevented from shifting during wrapping?
For light steel coils or flexible plastic pipe coils prone to jumping under film tension, top and side-stabilizing rollers (pneumatically actuated with adjustable holding force) secure the coil firmly down against the drive rollers.
Próximos Passos
We engineer coil packaging stations to your exact factory dimensions through a standard three-stage implementation:
- Revisão de Parâmetros: Submit your coil size matrix (ID/OD/Width/Weight) and desired production capacity to info@fhopepack.com. Our engineering group returns an initial system proposal and clearance drawing.
- Kinematic & Layout Approval: Review the calculated wrap cycle times, film yield rates, and equipment integration layout.
- Site & Safety Verification: Confirm floor loading capacities, electrical configurations, and factory infeed methods before manufacturing release.
Soluções Relacionadas
- Linha Automática de Embalagem de Bobina — Integrated industrial coil wrapping, transport, and stacking automation.
- Steel & Copper Coil Eye-Through Wrapping System — High-speed orbital eye-through wrapping machines for metals.
- Heavy-Duty Steel Coil Strapping Machinery — Automated radial and circumferential strapping systems for slit coils.
