Hydraulic Uncoilers for Roof Panel Lines: Short Reference Notes

1. Definition

A hydraulic uncoiler (液压开卷机 / 放料架 / decoiler) is the coil-handling unit at the head of a roof or wall roll forming line. It supports the coil, expands to grip the inner diameter, and pays strip into the forming mill under controlled tension.

It is supporting equipment — not the profile-forming host. Manual passive decoilers still appear on lighter packages; hydraulic expansion and motorized unwind are preferred as coil mass and line speed rise.

2. Role on a roof line

1. Load the coil onto the mandrel (often with a coil car on heavier classes)
2. Hydraulically expand the mandrel to lock the coil ID
3. Motorized unwind / reverse for threading and run
4. Feed strip at a speed coordinated with the roll former (sensor / loop control on many designs)

Wrong tonnage or width causes unsafe loading, coil ovality damage, or tracking problems into the first stands.

3. Common market classes

Public catalogs for roof-panel lines most often list 5 t and 10 t hydraulic uncoilers, typically with max coil width about 1250 mm and ID windows near 470–620 mm or 508 / 610 mm. Coil cars are frequently recommended once mass makes forklift loading risky.

Those market classes are orientation only. Do not treat a 5 t sheet as equivalent to a 25 t heavy decoiler.

4. 25 t heavy-duty baseline

One documented fully automatic hydraulic uncoiler baseline for heavier coil duty:

Other tonnages exist in the same equipment family. Quote the tier that matches project coil mass and width.

5. Options and dual-station layouts

• Hydraulic hold-down / press arm — helps control outer wraps on large OD coils
• Coil car — safer loading for mid and heavy classes
• Dual-station uncoilers — allow one coil running while the next is prepared; treat as a separate configuration when evidenced

6. Inquiry checklist

• Max coil mass and outer diameter
• Coil ID range and max strip width
• Manual vs hydraulic expansion; with/without coil car
• Single vs dual station
• Voltage / frequency and drive-brand preferences

7. Buyer FAQ

Is every roof line a 5 t uncoiler?

No. Many light packages use about 5 t; heavier plants may need 10 t or a 25 t class unit. Match coil mass.

Is the uncoiler part of the roll former?

It is line head equipment. It does not form the roof profile — the host does.

Can I copy 25 t power onto a 5 t unit?

No. Power, mandrel, and frame scale with tonnage class.