The automatic tyre packing machine is an orbital wrapping system for tire plants, retreading facilities, and automotive distribution hubs, where finished passenger, truck, and OTR tires need continuous surface protection against moisture, dust, and UV during warehousing and transit. Unlike pallet stretch wrappers that secure block loads, inline systems process unpalletized tires delivered on roller conveyors, applying high-tension film through the tire eye (radial wrapping) or across the tread.
Executive Summary
An automatic tyre packing machine processes tires delivered flat on powered roller lines, achieving end-to-end automation without manual handling. The system registers, centers, lifts, and wraps single or stacked tires in 20–35 seconds per unit. Key engineering benchmarks are cycle-time stability, consistent film overlap across shifting tire outer diameters (OD) and section widths, and tension control that safeguards tire bead geometry from distortion.
How Automatic Tyre Wrapping Works
The wrapping cycle is driven by two synchronized axes: the circumferential rotation of the tire and the orbital rotation of the wrapping ring.
[Infeed Roller Conveyor]
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[Pneumatic Indexing Stop & Photoelectric Detection]
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[Bilateral Self-Centering Clamps Align Tire to Ring Axis]
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[Internal Lifting Cradle Disengages Tire from Conveyor Bed]
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[Driven Cradle Rollers Rotate Tire (C-Axis)] ◄── synchronized ──► [Orbital Ring Rotates Film Carriage (A-Axis)]
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[Pneumatic Clamp & Hot-Knife / Mechanical Cut Unit]
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[Cradle Lowers Wrapped Tire Back to Outfeed Roller Line]- Infeed & Positioning: Tires travel along a motorized roller conveyor; a photoelectric sensor triggers a pneumatic index stop that halts the tire at the wrapping datum.
- Bilateral Centering: Dual-opposed pneumatic guides with non-marking polyurethane rollers clamp the sidewalls, aligning the tire bore with the orbital ring axis.
- Cradle Lift & Rotation: A driven cradle with polyurethane-coated support rollers lifts the tire 30–50 mm above the conveyor and rotates it around its axis.
- Orbital Film Application: The ring spins the film carriage through the tire bore; the ratio of ring speed to cradle drive speed sets the radial film overlap: Overlap Rate (%) = (1 − Linear Advance per Ring Rev ÷ Effective Film Width) × 100%.
- Cut, Wipe & Discharge: A gripper captures the film, a hot-wire or serrated blade cuts the tail, a wiping brush seals the end, and the cradle lowers the wrapped tire to the outfeed line.
Key sub-assemblies include a heavy-duty roller conveyor with 3–5 mm rubber-coated rollers, a pneumatic centering station with rack-and-pinion or dual-cylinder linkage, an orbital ring with polyurethane friction drive wheels, a motorized pre-stretch carriage delivering 150%–300% elongation, and a Siemens S7-1200 or Allen-Bradley Micro800 PLC/HMI managing motion, recipes, and diagnostics.
Technical Specifications
The machine supports passenger car radials (PCR), light truck radials (LTR), and commercial truck/bus radials (TBR):
| Parameter | Specification (PCR / LTR) | Specification (TBR / Heavy Commercial) |
|---|---|---|
| Tire Outer Diameter (OD) | 450–850 mm | 750–1,400 mm |
| Tire Section Width | 120–350 mm | 200–500 mm |
| Maximum Workpiece Weight | 45 kg (single) / 80 kg (stack) | 150 kg (single) / 250 kg (stack) |
| Wrapping Cycle Time | 20–30 seconds per tire | 30–45 seconds per tire |
| Ring Rotation Speed | Up to 120 RPM (inverter controlled) | Up to 80 RPM (inverter controlled) |
| Tire Rotation Speed | 5–25 RPM (infinitely variable) | 3–15 RPM (infinitely variable) |
| Film Material | LLDPE Cast / Blown / VCI Film | LLDPE Cast / Blown / HDPE woven tape |
| Film Thickness | 17–25 µm (68–100 gauge) | 23–35 µm (92–140 gauge) |
| Pre-Stretch Ratio | 150%–300% (geared power pre-stretch) | 200%–320% (dual-motor electronic control) |
| Radial Overlap Rate | 30%–70% (PLC programmable) | 40%–80% (PLC programmable) |
| Air Consumption & Pressure | 0.5–0.7 MPa; 120 NL/min | 0.6–0.8 MPa; 180 NL/min |
| Installed Power | 3.5–5.5 kW, 380/480 V 3P 50/60 Hz | 5.5–9.2 kW, 380/480 V 3P 50/60 Hz |
| Rated Production Capacity | 100–160 tires/hour | 70–110 tires/hour |
Conveyor Alignment and Centering
Consistent wrapping requires the tire bore to align concentrically with the ring’s rotating centerline; off-center tires cause uneven tension, erratic overlap, and risk of collision.
- Bilateral Mechanical Equalization: Centering arms are linked by rack-and-pinion equalizers or closed-loop proportional pneumatic valves, so off-center tires shift to the machine midline without operator input.
- Sidewall Protection: Guide contact plates use free-spinning roller bearings sleeved in HDPE or soft polyurethane (70–80 Shore A); clamping pressure regulated at 0.2–0.4 MPa prevents bead deformation and scuffing on polished tires.
- Dynamic Recipe Adaptation: On mixed-batch lines, an optical array measures tire OD and width upstream so the PLC adjusts centering stroke, cradle spacing, and drive speeds on the fly.
Film and Wrap Pattern
Selecting the right film and wrap kinematics directly controls packaging cost and storage shelf life:
- Film Types: Standard LLDPE cast stretch film offers clarity, puncture resistance, and one-side cling; VCI (vapor corrosion inhibitor) film protects exposed steel beads and winter studs in ocean transit; HDPE/PP woven tape suits heavy mining and truck tires.
- Pre-Stretch Dynamics: Motorized pre-stretch rollers elongate the film 200%–300% before application, work-hardening the polymer and cutting consumable cost by 45%–55% versus friction-brake wrapping.
- Tension Control: A spring-loaded dancer arm or load-cell loop keeps tension at 15–40 N, preventing thin treads from necking down while containing multi-tire bundles.
- Configurable Plies: Rather than fixed top/bottom wraps, operators select total radial layers — single-layer 50% overlap for dust protection, double-layer 67% overlap for outdoor UV and maritime export.
Inline Integration Benefits
Integrating the machine into finishing or sorting lines removes pallet handling and manual packing bottlenecks:
- Continuous Inline Operation: Direct integration with power roller lines, modular belt conveyors, or overhead lifters needs zero manual loading or crane intervention.
- Predictable Takt Time: Standard 20–35 s cycles sustain 100–160 units/hour, matching high-speed curing and uniformity testing cells.
- Elimination of Secondary Packaging: Tight wraps remove the need for cardboard interleaves, shrink hoods, or steel strapping on small (2–4 tire) bundles.
- Comprehensive Process Data: PLC architecture supports SCADA/MES connectivity via Ethernet/IP or Profinet, tracking film consumption, cycles per shift, runtime hours, and diagnostics.
Safety Systems
The machine complies with EN 415-6 (packaging machines), ISO 12100, and ISO 13849-1:
- Perimeter Guarding: Interlocked 2.0 m steel wire mesh fencing encloses the ring and cradle envelope.
- Access Door Interlocks: ISO 14119-compliant switches with solenoid guard locking (Cat 4, PL e) prevent door opening during rotation.
- Optical Presence Detection: Type 4 safety light curtains mute during tire transit and halt motion if an operator reaches into the active envelope.
- Fail-Safe Braking: Spring-applied friction disc brakes arrest full-speed ring inertia within 0.8 s on E-stop.
- Pneumatic Dump Valves & Lockout: Dual-channel dump valves exhaust trapped pressure on E-stop; energy isolation points carry OSHA-compliant LOTO provisions.
Maintenance Requirements
- Daily (Shift Check): Inspect the cutter blade and clear film residue; verify light curtains and E-stops; drain the filter/regulator bowl.
- Weekly: Clean the ring track and guide wheels; lubricate centering rails, bearings, and chains; check pre-stretch roller condition.
- Monthly: Inspect ring drive belt/chain tension, torque-check ring carriage fasteners, and check cylinders and proportional valves for leakage.
- Semi-Annually / Annually: Test safety circuits, interlocks, and braking distances; megger-test motors and inspect cabinets; recalibrate tension load cells and sensors.
Selection Guide
- Workpiece Size Envelope: Document the OD, inner diameter, section width, and weight of all SKUs, including stacked bundles.
- Line Speed & Integration Geometry: Confirm pass-line height (standard 650–850 mm), roller center distances, and the available takt time budget.
- Packaging Objectives: Choose single-layer radial wrap for indoor dust defense or multi-layer with VCI/UV-inhibited film for long-term shipping.
- Automation Level: Select standalone push-button units or fully integrated cells communicating with facility PLC/MES.
- Footprint & Service Access: Allow at least 1,200 mm clearance around the carriage swing radius for film reel changeover and maintenance.
Next Step
To configure an optimized inline tire wrapping system: detail your tire dimensional range (OD, width, weight), target throughput, and conveyor specifications; send layout drawings and parameters to info@fhopepack.com; receive a customized proposal with 3D layout, single-line drawings, and cycle simulation; then review and approve the bill of materials, safety architecture, and PLC interface before manufacturing release.
