Executive summary A steel slit coil packing line takes narrow coils from the slitter, turns them eye-up, wraps them through the eye and moves them on toward stacking, with few manual lifts. The line is rated for 25 to 40 coils per hour, 100 to 4,000 kg and 15 to 500 mm coil width.
Table of Contents
- What the machine does
- Stations of a slit coil packing line
- Line specifications
- Takt check
- Selection checklist for a slit coil packing line
- Controls and safety
- Engineering FAQ
- Next step
- Related reading
- Sources
What the machine does
The packaging line integrates welded structural steel frames, powered roller conveyors, heavy-duty hydraulic actuation cylinders, and flexible energy drag chains. Line automation is managed via floor-mounted control enclosures equipped with industrial touch panels, with multi-tier signal tower lamps mounted on overhead structural gantries for real-time operational status display.
- Slitter Exit Interface and Coil Transfer. Individual slit coils discharge from the slitter recoiler shaft and transfer onto the receiving station via a dedicated coil car or handling trolley with integral support rollers and hydraulic positioning cylinders.
- Hydraulic Down-Ending (Orientation Reversal). A heavy-duty mechanical tilting unit tilts the slit coil smoothly through 90°, transitioning the orientation between eye-horizontal (as slit) and eye-vertical (eye-to-sky, ready for packaging and stacking).
- Orbital Eye-Through Ring Wrapping. At the orbital wrapping station, the coil rests on driven support rollers while an automated ring shuttle feeds packaging stretch film continuously through the coil eye, applying a consistent, tension-regulated protective barrier.
- Buffered In-Line Conveyance. Powered roller sections transport the coil downstream beneath safety monitoring gantries, maintaining defined line spacing between sequential process steps.
- Central Indexing and Rotation. An integrated powered rotating platform indexes and reorients coils within the line layout, aligning them precisely for downstream strapping, weighing, or transfer sequences.
- High-Overlap Protective Wrapping. The wrapping carriage dispenses industrial stretch film or protective composite media from an orbital ring head, rotating circumferentially through the coil centre to establish water-resistant and edge-protective outer packaging.
- Discharge Conveying and Buffer Staging. Fully wrapped slit coils transfer across flat roller sections into staging buffer conveyors or storage racks, preparing them for final strap application and palletisation.
- Automated Continuous Cycle Execution. As wrapped coils advance toward the final stacking cell, the wrapping station resets to receive the next incoming slit coil, sustaining continuous cyclic throughput.
Stations of a slit coil packing line
A slit coil leaves the slitter with its eye horizontal. The line has to wrap it, strap it, and turn it eye-up for stacking on a pallet. Strapping and stacking are stations on the line; the machine shown here covers the turning, wrapping and conveying part of that path.
| Station | What it does |
|---|---|
| Coil car or turnstile pick-up | Takes coils off the slitter exit |
| Tilting unit (down-ender) | Turns the coil between eye-horizontal and eye-up |
| Ring wrapping station | Wraps film through the eye, with overlap set per coil |
| Strapping station | PET or steel straps through the eye |
| Roller conveyors and rotating platform | Move and orient coils between stations |
| Stacking station | Stacks wrapped coils on a pallet |
We build the line in three levels. The economic line uses a coiler trolley, a 90° tilting down-ender and a manual jog crane. The standard line adds an exit turnstile pick-up, in-line weighing and automatic or semi-automatic bundling. The advanced line runs automatic strapping, eye-through orbital wrapping and automatic gantry stacking.
For mechanical handling and surface preservation, lifting and tilting mechanisms are powered by an industrial hydraulic power unit, with a down-ending cycle time of approximately 60 s [manufacturer rating]. Roller conveyors are fitted with 100 mm diameter polyurethane (PU) coated rollers to prevent coil surface scratching, while final stacking capacities support up to 6,000 kg total pallet load at a maximum stacking height of 1,000 mm including pallet [manufacturer rating].
Line specifications
| Slitting coil packaging line | Specification |
|---|---|
| Packaging capacity | 25 to 40 coils per hour |
| Coil weight | 100 to 4,000 kg |
| Coil width | 15 to 500 mm |
| Coil outer diameter | 600 to 1,500 mm, up to 2,100 mm on request |
| Coil inner diameter | 508 or 610 mm |
| Strapping cycle | 15 to 35 s per strap |
| Strapping tension | 2,000 to 22,000 N |
| Wrapping overlap | 10% to 90%, orbital eye-through film |
| Stacking accuracy | ±2 mm |
| Utilities | 380 to 480 V, 50 or 60 Hz, 3 phase; air 5 to 8 bar |
| Lead time | 110 to 140 days for fabrication, assembly and FAT |
Across operating configurations, system automation runs via an integrated PLC platform with an industrial HMI touchscreen; strapping media transitions from standard PP or steel band up to high-tension PET strapping, and wrapping media expands from standard stretch film or paper up to VCI anti-corrosion film or woven composite fabrics on advanced installations [manufacturer rating].
Takt check
At 40 coils per hour the takt is 3,600 ÷ 40 = 90 s per coil. At 25 coils per hour it is 3,600 ÷ 25 = 144 s.
Each station has to finish inside that window. With strapping at 15 to 35 s per strap, a coil with two straps uses 30 to 70 s of pure strapping time. That leaves 20 to 60 s for indexing and conveying within a 90 s takt. Wrapping time depends on the coil width and the overlap, so we check it per coil range in the proposal. Where one station runs close to the takt, we add a buffer conveyor ahead of it.
Selection checklist for a slit coil packing line
- Coil width, OD, ID and weight range from the slitter.
- Output per hour, matched to the slitter cycle.
- Wrapping material and overlap, and the strap type and count.
- Line level: economic, standard or advanced.
- Stacking pattern, pallet size and labelling.
- Floor space, crane access and the operator positions.
Controls and safety
The layout keeps operators outside the fence line while the line runs. A person inside the reach of a tilting unit, a wrapping ring or a moving conveyor is the move to design out. Our lines carry complete perimeter fencing, light curtains and fail-safe interlocks, so the operator works from outside the fence.
Stop, isolate and lock out the station before anyone enters the fence to clear a film or strap break, change a roll or work on a tilter or ring. Restart only after the fence is closed and the interlock is reset.
The standards that apply depend on the destination market. For CE markets, ISO 12100 sets the risk-assessment method and EN 415-10 covers general requirements for packaging machines, which fixes guarding and the stop arrangement.
Engineering FAQ
Q: What output does a slit coil packing line reach? A: Our line is rated for 25 to 40 coils per hour, for coils of 100 to 4,000 kg and 15 to 500 mm width.
Q: Which coil sizes does the line take? A: Coils of 600 to 1,500 mm OD, up to 2,100 mm on request, with 508 or 610 mm ID.
Q: How long does a line take to build? A: Fabrication, assembly and FAT take 110 to 140 days for a standard line.
Next step
We size a slit coil packing line in three steps:
- Submit your layout drawing with the slitter exit, coil range, output target and stacking pattern, to info@fhopepack.com.
- Receive a proposal within 48 hours, with the station list, the line level and the takt check per station.
- Book a site survey so we confirm the floor space, the crane access and the fence layout.
Related reading
- Slitting coil packaging line
- Steel coil packing machine FPS-400
- Coil packing machines
- Steel strip coil packing machine
Sources
- Line specifications and configurations: slitting coil packaging line product page
- Line in action: our video on YouTube
- Standards scope: ISO 12100:2010, EN 415-10:2014
Last reviewed: 2026-10-29
