Executive summary In a mobile bridge horizontal orbital wrapper, a long bundle of boards remains stationary on a heavy-duty fixed support frame while the motorized orbital ring travels continuously along the bundle’s longitudinal axis. Combining ring rotation with bridge translation applies an end-to-end helical protective film wrapping. Because the product does not translate or accelerate through an infeed station, this kinematic layout eliminates friction scratching, conveyor-induced vibration, and structural sagging across long, heavy, or surface-critical loads.
Table of Contents
- What the machine does
- Why move the ring, not the load
- Turns per bundle
- What we set per bundle
- Selection checklist
- Safety
- Engineering FAQ
- Next step
- Related reading
- Sources
What the machine does
| Step | What happens |
|---|---|
| Loading | A long bundle of boards is loaded and positioned securely on the stationary bed frame. |
| Start | The operator initiates the wrapping cycle from the primary HMI control console. |
| Wrapping | The orbital ring rotates around the load while the mobile bridge traverses the length of the bundle. |
| Film | Continuous stretch wrapping covers the package from end to end with consistent overlap tension. |
| Finish | The fully wrapped bundle remains stationary on the frame, ready for crane or forklift discharge. |
Why move the ring, not the load
- Long loads. Eliminates the footprint requirement for extended powered roller infeed and outfeed conveyors.
- Heavy loads. Structural packages rest directly on rigid supports instead of being pushed across active roller beds.
- Fragile loads. Prevents bundle layer shifting, scuffing, and bottom-surface abrasion because the workpiece does not slide or vibrate during transit.
- Short floor. Total line length is reduced roughly to the bundle length plus the bridge carriage envelope, maximizing plant space utilization.
Turns per bundle
Worked example (illustrative).
| Item | Value |
|---|---|
| Bundle length (illustrative) | 6,000 mm |
| Film width (illustrative) | 250 mm |
| Overlap (illustrative) | 50% |
| Advance per turn, 250 × 0.5 | 125 mm |
| Turns for one pass, 6,000 ÷ 125 | 48 turns |
Engineering note on drive parameters: In production systems, turn calculations interface directly with inverter-driven ring and gantry motors. On standard baseline orbital equipment, ring rotational speeds are typically adjustable from 10–120 r/min (with ring linear speeds of 5–15 m/min) and overlap ratios can be parameterized between 10% and 90% [manufacturer rating]. On mobile bridge architectures, the bridge travel speed is synchronized to maintain the programmed pitch and film overlap.
What we set per bundle
| Setting | Depends on |
|---|---|
| Ring size | Bundle cross-section (diagonal profile plus rotating dispenser clearance) |
| Bridge travel | Bundle total length and designated end-overwrap limits |
| Film | Stretch film or polyethylene (PE) roll specifications; roll OD 100–200 mm, width 100–200 mm, core ID 50 mm [manufacturer rating]; opaque UV-barrier, clear, or printed film |
| Overlap | Required moisture protection, transport rigidity, and dust barrier specifications |
Selection checklist
- Bundle length, width, height, and maximum cross-sectional diagonal.
- Bundle gross weight and deflection characteristics.
- Packaging film type, thickness, color, and roll core dimensions.
- Required overlap percentage (e.g., 50% for standard dust wrap; higher for outdoor weather protection).
- Throughput target in bundles per hour.
- Total available shop floor length and overhead crane clearance.
Safety
- Maintain established safety clearance zones around the rotating ring and the linear travel path of the bridge.
- Lock out or ensure verified machine standstill before manual loading, strapping adjustment, or bundle discharge.
- Ensure all personnel remain outside perimeter safety guarding and light curtains while automatic cycles run.
- For CE-regulated installations, machine safety layouts are engineered in accordance with ISO 12100 risk assessment methodologies and EN 415-10 specific packaging machine safety standards.
Engineering FAQ
Q: What is a mobile bridge orbital wrapper? A: It is a horizontal stretch wrapping machine where the orbital rotating ring assembly is mounted to a motorized gantry bridge. The bridge traverses along stationary support fixtures, applying wrapping material around a workpiece that stays completely still.
Q: Why choose a mobile bridge over a conventional conveyor-fed orbital wrapper? A: It is ideal for long, heavy, or bend-sensitive products. Because the workpiece never moves during wrapping, plant floor length is conserved and packages are protected from conveyor scuffing, misalignments, or inter-layer displacement.
Q: How do you determine the required turns per bundle? A: Divide the total wrapping stroke by the effective linear advance per ring rotation (calculated as film width multiplied by 1 minus the overlap ratio). In our 6,000 mm example with 250 mm film and 50% overlap, the advance is 125 mm, requiring 48 turns.
Q: What types of film can be deployed? A: The system handles standard LLDPE stretch film, opaque or UV-inhibited black films, corrosion-inhibiting VCI film, or pre-printed corporate wrap.
Q: What load profiles are most suitable for this machine? A: Bundled timber boards, architectural panels, extruded aluminum profiles, steel conduit, and other long products whose cross-section fits within the inner ring clearance envelope. Special hold-down units can be fitted to secure top surfaces during cycle start.
Q: What industrial safety standards apply to this equipment? A: Machinery design conforms to ISO 12100 (Safety of machinery — General principles for design) and EN 415-10 (Safety of packaging machines — Part 10: General requirements), alongside regional electrical code requirements.
Next step
We configure each orbital wrapping installation in three engineering stages:
- Submit your layout drawing including bundle length ranges, maximum cross-sections, and weight distributions to info@fhopepack.com.
- Receive a formal proposal within 48 hours, including kinematic calculations, equipment dimensions, and electrical layouts.
- Book an on-site or digital plant survey to verify physical bay dimensions, loading access, and cycle integration requirements.
Related reading
- Horizontal Orbital Wrapping Machine for Pipes
- Online Paper Roll Wrapping Machine
- Long Shape Bag Packing and Shrinking Machine
- Orbital stretch wrapper
Sources
- Machine engineering data: FHOPE engineering team, technical parameters confirmed 2026-10-29
- Machine in action: FHOPE mobile bridge horizontal orbital wrapper technical trials
- Turns per bundle: Worked engineering example, illustrative kinematic parameters
- Standards scope: ISO 12100:2010 (General principles for design — Risk assessment and risk reduction); EN 415-10:2014 (Safety of packaging machines)
- Standard technical specifications: FHOPE E-series horizontal orbital wrapping platform documentation [manufacturer rating]
- Proposal turnaround: Approved factory engineering standard (formal technical proposal within 48 hours)
Last reviewed: 2026-10-29
