Hydraulic Decoiler
The first machine in every roll forming line — 3 T, 5 T and 10 T hydraulic decoilers with expanding mandrel and pneumatic brake.
Technical Specifications
| Capacity | 3 T · 5 T · 10 T |
| Configuration | Single head or double head |
| Coil ID | 480 – 520 mm, expandable mandrel |
| Coil OD | Max 1500 mm |
| Coil width | Up to 1300 mm |
| Expansion | Hydraulic motor, 4-segment mandrel |
| Brake | Pneumatic or hydraulic band brake, tension controlled |
| Rotation | Electric motor drive, variable speed |
| Control | Integrated with line PLC, or stand-alone panel |
| Certification | CE Declaration of Conformity |
| Lead time | 25 – 35 days |
Need a quote or a custom specification?
Recommended Configuration
A complete working line, not just the forming machine. Each item below is quoted as one package.
- 01
Capacity matched to your coil supply
most roofing and framing lines use a 3 T or 5 T decoiler, because standard coil is supplied in 3–5 tonne weights. Guardrail and heavy purlin lines normally need 5–10 T, because the material is thicker and the coils are heavier. Getting this wrong is expensive in one direction only: an oversized decoiler wastes money, an undersized one cannot run the coil you buy.
- 02
Double-head configuration where the line runs continuously
a double-head decoiler carries two coil positions, so you load the next coil while the first is still running and change over without stopping. That saves 10–20 minutes per coil change, which across a shift is the difference between one and two coil changes.
- 03
Band brake with tension control
this is the component that decides finished profile length consistency. Without controlled back-tension the coil over-runs, the strip goes slack, the loop jumps or kinks, and the length of the formed piece varies. A band brake keeps constant tension as the coil diameter reduces from full to empty.
- 04
Expanding mandrel
a 4-segment hydraulic mandrel grips the coil bore (480–520 mm) from the inside, so the coil cannot slip on the mandrel under tension. A slipping coil damages both the bore and the first wraps of strip.
- 05
Coil car above 5 T
loading a heavy coil onto the mandrel with a forklift alone risks damaging the mandrel and crushing the coil edge. A coil car is optional, but above 5 T it is worth having.
- 06
Line integration
either a stand-alone control panel or signals matched to your existing line PLC. Tell us the line make and control voltage and we configure accordingly rather than quoting a generic cabinet.
Production Workflow
- 01
Coil loading
The coil is brought to the mandrel by forklift or coil car, positioned on the bore, and the 4-segment hydraulic mandrel is expanded to grip it. Coil bore is 480–520 mm and maximum coil outside diameter is 1500 mm.
- 02
Mandrel expansion
The hydraulic motor expands the mandrel segments against the coil bore. Correct expansion pressure matters: too little and the coil slips under tension, too much and the bore is deformed.
- 03
Threading
The leading wraps are released and the strip is threaded into the leveling unit or the first forming station, depending on the line. This is the point where damaged outer wraps are usually discovered.
- 04
Rotation and brake setting
The electric motor drive runs at variable speed and the band brake holds back-tension. Both are set against the line speed, so the coil feeds as fast as the line consumes it rather than running free.
- 05
Running
As the coil diameter reduces, the brake has to increase its hold to keep the same strip tension. That is the whole reason a band brake with tension control is specified rather than a simple mechanical brake.
- 06
Coil change
On a single-head decoiler the line stops, the mandrel contracts, the empty sleeve is removed and the next coil loaded. On a double-head machine the second position is prepared in advance and the change is a rotation and a re-thread.
Key Components
- Capacity
- 3 T · 5 T · 10 T, single head or double head
- Mandrel
- 4-segment, hydraulically expanded, for coil bore 480–520 mm
- Brake
- Pneumatic or hydraulic band brake with tension control
- Rotation
- Electric motor drive, variable speed
- Coil limits
- outside diameter max 1500 mm · width up to 1300 mm
- Control
- Stand-alone panel, or integrated with the line PLC
Customization Options
Every line is built to order. These are the points buyers most often change.
| Item | What can be changed |
|---|---|
| Capacity | 3 T / 5 T / 10 T. Choose 3–5 T for roofing and framing, 5–10 T for guardrail and heavy purlin work |
| Heads | Single head, or double head where the line runs continuously and you want to pre-load the next coil |
| Coil bore | 480–520 mm standard expandable mandrel; other bores to your coil supply |
| Brake type | Pneumatic for lower tension, hydraulic where higher back-tension is needed |
| Coil car | Optional; recommended above 5 T to protect the mandrel and the coil edge |
| Integration | Stand-alone control panel, or match signals to your existing line PLC — give us the line make and control voltage |
| A note on damaged coil | A decoiler will uncoil crushed or damaged coil, but the damage carries through into the profile unless the line has a leveling unit. Crushed outer wraps are common after sea freight, so we recommend a straightener on any line running export coil |
Applications
FAQ — Hydraulic Decoiler
What decoiler capacity do I need?
What is the difference between a single-head and double-head decoiler?
Why is the brake important?
Can it handle coils with damaged or crushed edges?
Does the decoiler come with a coil car?
Can the decoiler be integrated with an existing line?
Can the machine be built for our own profile?
How do we get a price for this line?
How is the line controlled?
What working width does the line run?
What is the lead time?
What certification and documentation is provided?
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Send us your profile and output target
Tell us the profile and the numbers that matter to you. We confirm the configuration against the specification table above and quote FOB Tianjin within 24 hours.
- Capacity3 T · 5 T · 10 T
- ConfigurationSingle head or double head
- Coil ID480 – 520 mm, expandable mandrel
- Coil ODMax 1500 mm