Sintesi
Coil packaging by stretch film, eye-through, seals a coil lying flat: a ring carries the film through the eye and round the section while rollers turn the coil once. Our FPCA-1000 horizontal wrapper takes coils of 700–1,600 mm OD, 20–400 mm width and 100–2,000 kg, with overlap set from 20% to 90%. A worked example shows why overlap must be set from the OD: 50% at the ID leaves only about 3% at the OD.
Sommario
- Why eye-through film packaging for coils
- Our horizontal eye-through wrapper on roller conveyors
- Il ciclo di avvolgimento
- Dati FPCA-1000
- Worked example: setting overlap from the OD
- Materiali da imballaggio
- Lista di controllo per la selezione
- Sicurezza: EN 415-10 e ISO 12100
- FAQ di ingegneria
- Passo successivo
- Lettura correlata
- fonti
Why eye-through film packaging for coils
A coil wrapped only round the OD is still open at the eye and the two faces. Dust, moisture and handling damage get in from the sides. Eye-through wrapping carries the film through the eye and round the whole section, so the coil is sealed on every face.
On a horizontal machine the coil lies flat, which suits narrow coils and slit strip that would topple if stood on edge.
Our horizontal eye-through wrapper on roller conveyors
The coil lies flat on a yellow powered roller conveyor and runs into the machine. Here the vertical wrapping ring passes through the eye. Above the coil, an arm with white rollers comes down and holds the coil while it turns. A yellow mesh guard closes the wrapping area, and the out-feed conveyor takes the coil away. In-feed conveyor, ring wrapper and out-feed conveyor form one automatic cell.
Il ciclo di avvolgimento
- In alimentazione. The coil runs in on the roller conveyor and stops in position.
- Ring through the eye. The ring opens, passes through the eye and closes.
- Aspetta. The top roller arm comes down onto the coil.
- Avvolgere. The ring carries the film round the section while the rollers turn the coil through 360°.
- Cut and out. The film is cut and held, the ring opens and the coil runs out.
Dati FPCA-1000
From our horizontal coil wrapper page:
| Articolo | FPCA-1000 |
|---|---|
| coil ID | 508 / 610 mm |
| coil OD | 700–1,600 mm |
| Larghezza della bobina | 20–400 mm |
| peso della bobina | 100-2,000 kg |
| sovrapposizione | 20-90% |
| Potenza | ca. 4.5 kW |
| Tensione | 380 V 50 Hz 3-phase 5-wire, can be customized |
| Rifornimento d'aria | 5–7 kgf/cm² (circa 0.5–0.7 MPa) |
| Materiali Necessari | PVC, LLDPE, PE, HDPE, paper; roll size set by coil size |
Safety: interlocked steel mesh guarding wired to the PLC, solenoid gate locks and an E-stop response under 500 ms. Other coil sizes are built to order.
Worked example: setting overlap from the OD
Illustrative coil: ID 508 mm, OD 1,000 mm, width 200 mm, 120 mm film. The section the film goes round is 246 mm deep and 200 mm wide, so each wrap uses 2 × (246 + 200) ≈ 0.89 m of film.
| Configurazione | Wraps | Overlap at ID | Sovrapposizione al diametro esterno | Film on coil |
|---|---|---|---|---|
| 50% at the ID (60 mm advance) | π × 508 ÷ 60 ≈ 27 | 50% | 3,142 ÷ 27 ≈ 116 mm spacing, ≈ 3% | 27 × 0.89 ≈ 24 m |
| 30% at the OD (84 mm spacing) | π × 1,000 ÷ 84 ≈ 38 | ≈ 65% | 30% | 38 × 0.89 ≈ 34 m |
Risultato. The film fans out from the eye to the OD. With 50% at the ID, the OD is covered with only about 3% overlap and can open in handling. For a sealed coil we set the wrap count from the OD and accept the heavier overlap at the eye, here about 10 m more film per coil.
Check against a real coil. On a coil of 1,400 mm OD, 508 mm ID and 300 mm width with 120 mm film and a 30 mm advance at the ID, our figure was about 80 m per coil. The same formula gives π × 508 ÷ 30 ≈ 53 wraps × 1.49 m ≈ 80 m.
Materiali da imballaggio
- Stretch film (LLDPE/PE): sealed, see-through; the usual choice.
- PVC or HDPE film: stiffer, for sharp edges.
- Carta di stampa: breathable, for coils that must not sweat.
- Due strati: paper first and film over it, where the coil needs both.
Lista di controllo per la selezione
- Intervallo di diametro interno, diametro esterno, larghezza e peso della bobina.
- Coil type: slit strip, strap, wire or tube.
- Packing material and overlap at the OD.
- Bobine all'ora.
- In-feed and out-feed: conveyor, crane or forklift.
- Voltage and country of installation.
Sicurezza: EN 415-10 e ISO 12100
This wrapper is designed to EN 415-10 and assessed to ISO 12100. The ring passing through the eye, the top roller arm and the conveyors are the hazards. The yellow mesh guard is interlocked through the PLC, so opening a gate stops the ring, the rollers and the conveyors together. Film change and threading are done with the cell stopped.
FAQ di ingegneria
Q: Why set overlap at the OD and not the ID? A: The film spreads out towards the OD. A setting that looks generous at the eye can leave the outside barely covered.
Q: What does the top roller arm do? A: It holds the coil down so it turns with the rollers without slip, axial walk or tipping, which matters on light and narrow slit coils.
Q: Can the machine wrap paper? A: Yes, paper and film are both used, alone or one over the other.
Q: Which standard applies? A: EN 415-10, with an ISO 12100 risk assessment for CE.
Passo successivo
- Inviare il diametro interno, il diametro esterno, la larghezza e il peso della bobina. a info@fhopepack.com.
- We work out the wrap count and film use per coil.
- Rispondiamo entro 24 ore con un layout e un preventivo.
Lettura correlata
- Horizontal coil wrapper FPCA-1000 (product)
- Linea di confezionamento di bobine tagliate (prodotto)
- A production manager’s guide to slit coil upending, transport and eye-through wrapping
- Il modo di imballare il pacco di bobine tramite macchina
fonti
- FHOPE FPCA-1000 horizontal coil wrapper product page
- FHOPE project notes on film use per coil
- Our horizontal wrapping cell shown above
- Esempio pratico: figure illustrative
- Norme: EN 415-10; ISO12100:2010
Ultimo aggiornamento: 18/10/2026
