Cable Wire Coil Re-winding and Strapping Machine

Executive summary

Primary cable and wire manufacturing delivers products on heavy continuous pay-off reels, yet industrial distribution and electrical installation require standardized, field-ready coils defined by specific cut-lengths or targeted gross weights. Manual re-coiling introduces inconsistent winding tension, irregular coil geometry, and core loosening prior to packaging. An automated cable rewinding, coiling, and strapping line integrates continuous tension-controlled dereeling, precision length measurement, dual-flange servo coiling, and through-the-eye radial strapping into a single continuous process. This engineering guide details the operating stations, OEM technical specifications (FCL-800 / FCL-600), coil sizing calculations, and equipment selection criteria.

Table of Contents

What a Re-Winding Line Does

Master manufacturing drums typically store continuous runs spanning several thousand meters of building wire, power cable, or specialized conduit. Electrical contractors, wholesalers, and retail distributors require compact, consistent coils—typically 50 m, 100 m, or predetermined unit weights (such as 10 kg to 30 kg packages)—that pack efficiently into corrugated cartons or stack securely on EU/US standard pallets.

In field distribution projects, bulk wire coils of 1,000 kg must be reliably converted into uniform, commercial-ready coils of 9 kg, 25 kg, or 30 kg without surface friction damage or coil collapse. An automated rewinding line draws bulk cable from a dynamic pay-off stand, tracks length under encoder closed-loop feedback, actuates a high-speed cut-off blade, winds the product into a tight cylindrical coil, and applies multiple radial straps through the coil eye before structural coil relaxation can occur.

Line Stations and Mechanical Flow

[ Bulk Pay-Off Stand ]
          │ (Active Dancer Arm Tension Feedback)
          ▼
[ Dual-Wheel Meter Counter & Cut-off Shear ]
          │ (Closed-Loop Length & High-Speed Trigger)
          ▼
[ Ball-Screw Servo Traverse & Coiling Head ]
          │ (Dynamic Pitch Distribution)
          ▼
[ Pneumatic Coil Transfer & Outfeed Table ]
          │ (Ejection onto Powered Roller Conveyor)
          ▼
[ Through-the-Eye Radial Strapping Station ]
          │ (90° / 120° Indexing Rotational Head)
          ▼
[ Outfeed Conveyor to Packaging Station ]
  1. Active Tension Pay-Off Stand: Houses the bulk supply reel (cantilever or portal type) driven by an AC motor. A pneumatic dancer arm provides continuous tension regulation, preventing cable stretching, jacket scuffing, or inertia overrun during high-speed deceleration.
  2. Measurement and Cutting Station: A dual-wheel digital encoder tracking unit contacts the cable under constant pneumatic load to prevent slip. Once the target length is registered, the line decelerates, and a heavy-duty pneumatic/hydraulic guillotine shear executes a clean transverse cut.
  3. Servo Traverse and Coiling Head: An electronic traverse guide driven by a precision ball screw tracks cable diameter, laying adjacent turns smoothly across the coil width without overlapping or cross-winding. The expanding coiling mandrel, powered by an AC servo drive, forms the defined inside diameter (ID).
  4. Pneumatic Coil Push-Out: Upon winding completion, the outer coiling flange retracts, the central mandrel collapses pneumatically, and an integrated pusher arm shifts the intact coil onto an infeed roller table.
  5. Radial Strapping Arch: The strapping unit indexes the coil horizontally. A specialized strapping arch traverses through the open coil eye, applying tensioned PP (polypropylene) or PET straps radially around the winding cross-section at 2, 3, or 4 indexing points.
  6. Outfeed and Downstream Integration: Fully secured coils transfer automatically downstream for automated horizontal orbital stretch wrapping, heat-shrink bagging, robotized case packing, or palletizing.

The central PLC system stores discrete product recipes containing cut lengths, traverse pitch offsets, coiling acceleration curves, and strapping configurations.

Technical Specifications

The automatic coiling and strapping platform accommodates diverse wire diameters, coil packages, and line speeds. The table below outlines standard machine parameters for the heavy-duty FCL-800 series alongside the compact FCL-600 configuration:

Machine Parameter FHOPE FCL-800 Coiling & Strapping Line FHOPE FCL-600 Compact Line
Finished Coil Outer Diameter (OD) 500–800 mm 300–600 mm
Coil Inner Diameter (ID, Expandable) 200–300 mm / 250–500 mm / 300–600 mm 150–250 mm / 200–350 mm
Finished Coil Height (Width) 80–200 mm or 100–300 mm 50–150 mm or 80–200 mm
Applicable Cable Outer Diameter (OD) 5–16 mm, 10–20 mm, or 15–30 mm 2–10 mm or 4–15 mm
Linear Coiling Speed Up to 80 m/min (variable frequency) Up to 120 m/min (servo-driven)
Coiling Spindle Drive AC Servo / Closed-loop Vector Inverter High-speed AC Servo
Traverse Drive System Precision Ball Screw with Servo Indexing Ball Screw / Stepper Tracking
Strapping Material & Positions Polypropylene (PP) / PET; 2 to 4 radial straps Polypropylene (PP); 2 or 3 radial straps
Strapping Cycle Time Approx. 12–18 seconds (depending on strap count) Approx. 10–14 seconds
Pneumatic Supply Requirement 0.5–0.7 MPa (Dry, filtered air) 0.5–0.7 MPa

Note: Cable physical flexibility, sheath friction coefficient, and pay-off drum dimensional limits are verified during technical quotation.

Coil Dimension and Weight Calculations

To accurately configure the coiling mandrel width, expansion diameter, and traverse parameters, the relationship between cut length, cable diameter, and finished coil geometry must be evaluated.

Fundamental Geometric Relationships

  • Turns per Layer (N_turns): N_turns = floor(Coil Height / Cable OD)

  • Radial Layers (N_layers): N_layers = floor((Coil OD - Coil ID) / (2 × Cable OD))

  • Mean Coil Diameter (D_mean): D_mean = (Coil ID + Coil OD) / 2 = Coil ID + (N_layers × Cable OD)

  • Theoretical Coil Length (L): Length ≈ π × D_mean × N_turns × N_layers

  • Gross Package Weight (W_gross): Weight = Length × Cable Linear Mass (kg/m) + Strapping Tare Weight

 ┌───────────────────────────────────────────────┐
 │               Coil Height (H)                 │
 │       ◄──────────────────────────────►        │
┌┴───────────────────────────────────────────────┴┐ ▲
│  ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )  Layer 5│ │
│  ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )  Layer 4│ │
│  ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )  Layer 3│ │ Radial Build
│  ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )  Layer 2│ │ (Coil OD - Coil ID) / 2
│  ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )  Layer 1│ │
└┬───────────────────────────────────────────────┬┘ ▼
 │       ◄──────────────────────────────►        │
 │              Coil Core (ID)                   │
 └───────────────────────────────────────────────┘

Practical Calculation Example

For a continuous power cable with an outer diameter (Cable OD) of 10 mm, target package parameters are:

  • Coil ID = 300 mm
  • Coil Height = 100 mm
  • Total Radial Layers = 5
  1. Turns per layer: 100 mm / 10 mm = 10 turns
  2. Finished Coil OD: 300 mm + (2 × 5 layers × 10 mm) = 400 mm
  3. Mean Coil Diameter: (300 mm + 400 mm) / 2 = 350 mm = 0.35 m
  4. Calculated Length: Length ≈ 3.1416 × 0.35 m × 10 turns × 5 layers ≈ 55.0 m

The high-precision encoder meter counter controls actual cut length independently of minor winding tension variations; these geometric equations ensure that the finished coil matches the clearance specifications of subsequent boxing or orbital wrapping stations.

Engineering Selection Checklist

To determine the correct machine layout and component sizing, confirm the following production variables:

  1. Cable Specification Matrix: Cable outer diameter range (minimum/maximum OD), bend radius limits, jacket material type (PVC, PE, XLPE, LSZH, or rubber), and linear weight (kg/m).
  2. Finished Coil Parameters: Target cut lengths (m), target batch weights (kg), required internal core diameter (ID), maximum allowable outer diameter (OD), and coil package height.
  3. Bulk Pay-Off Configuration: Bulk drum outer diameter, drum width, arbor hole size, total gross weight, and whether dereeling is shafted, cantilever, or driven by walk-in portal carriages.
  4. Binding and Strapping Needs: Number of radial strap positions per coil (2, 3, or 4 straps), strapping material preference (polypropylene or polyester), and heat-seal versus friction-weld requirements.
  5. Downstream Finishing Operations: Requirements for automated online inline labeling, coil shrink-wrapping, horizontal orbital film wrapping, or transfer to automated case-packing lines.
  6. Required Throughput Capacity: Target operational output expressed in finished coils per hour or running line speed per shift.

Safety Standards and Risk Reduction

FHOPE cable rewinding and packaging machinery complies with internationally harmonized industrial safety directives:

  • EN ISO 12100:2010: Fundamental machinery safety, iterative risk assessment, and hazard mitigation.
  • EN 415-10: Specific safety requirements for packaging machines, winding stations, and automated strapping mechanisms.
  • EN 60204-1: Electrical safety, low-voltage control architecture, servo drive bonding, and motor thermal overload monitoring.
  • Operator Protective Boundary: Interlocked perimeter light curtains or polycarbonate enclosures protecting the high-speed rotating coiling head and pneumatic transverse shear. Opening any service access door trips a Category 3, Performance Level d (PL d) safety circuit, venting pneumatic accumulators and halting high-speed servo rotation within 1.2 seconds.
  • Emergency Systems: Emergency-stop (E-stop) pushbuttons placed at the operator HMI, pay-off base, coiling head frame, and strapping arch perimeter, with broken-wire tension-loss auto-trips.

Engineering FAQ

Can the line execute coil cut-off by weight rather than length?

Yes. While closed-loop dual-wheel length measuring is standard, an inline static platform scale can be integrated at the coiling outfeed roller. The PLC dynamically calculates total linear mass and modulates the cut trigger when reaching pre-set weight thresholds, suitable for uniform scrap or bare conductor packaging.

How does the system eliminate cable overlapping and tangling during high-speed coiling?

The system couples a digital servo motor directly to a precision ground ball-screw traverse mechanism. By programming the cable outer diameter into the touchscreen recipe, the traverse moves exactly one cable diameter per coiling spindle revolution, reversing cleanly at the flanges without pinch points.

What determines whether a coil requires 2, 3, or 4 radial straps?

Coil stability depends on cable bend stiffness and outer diameter. Supple flexible cables (e.g., multiconductor PVC) retain mechanical shape with 2 opposing radial straps (at 180°). Rigid cables with high spring-back memory (e.g., cross-linked polyethylene XLPE or armored lines) require 3 straps (at 120°) or 4 straps (at 90°) through the eye to prevent unwinding.

Can a single coiling and strapping line accommodate multiple product lines?

Yes. The machine handles various products within the rated physical envelop (e.g., 5–30 mm OD). Operators select pre-configured recipes from the PLC interface, setting motorized positioning of guide rollers, traverse stroke limits, and coiler core expansion dimensions with minimal mechanical tooling changes.

Next Step and Application Sizing

  1. Transmit Operating Parameters: Send your cable diameter ranges, target coil ID/OD dimensions, cut lengths, and bulk pay-off drum drawings to info@fhopepack.com.
  2. System Sizing and Simulation: Our mechanical engineering team verifies dereeling tension kinematics, traverse synchronization, and strapping cycle rates against your shift output requirements.
  3. Engineering Proposal Delivery: Receive a comprehensive technical specification proposal, line layout drawing (CAD/DWG format), and commercial quotation within 24 business hours.

Sources

  • FHOPE Technical Documentation: FCL-800 & FCL-600 Automatic Coiling & Strapping Systems.
  • Industrial Machinery Safety Directives: EN ISO 12100:2010, EN 415-10, EN 60204-1.
  • Practical factory commissioning data for wire & cable secondary packaging lines.

Last reviewed: 2026-10-20

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