1. Overview

1.2 Profile
The profile is formed from galvanized or color-coated steel coils, thickness ranging 0.3 to 0.8 mm. The two-layer design produces trapezoidal panels on top and corrugated panels below. The profiles feature high rigidity, corrosion resistance, and easy installation, widely used in roofing, wall cladding, and industrial building applications.
Material: Galvanized Steel / PPGI / Aluminum
Yield strength: 200 - 350 Mpa
Thickness: 0.3-0.8mm
Tensil stress: 200 -350 Mpa

1.3 Production Process

Flow Chart: Hydraulic Decoiler → Entry Guide → Roll Former → Hydraulic Cutter → Run-out Table

Process: The double-layer roll former shapes two roof panel profiles simultaneously, increasing productivity and versatility. Chain-driven transmission ensures smooth, stable forming with safety guards protecting operators and equipment. Hydraulic cutter provides precise cutting for high-quality panels, meeting demanding roofing industry standards.

2. Technical Parameters

2.1 Decoiler
Structure	Double-support
Working Form	Manual, motorized, or hydraulic
Loading Capacity	5T/7T/10T, customizable
Coil Width	1250mm, customizable
Inner Diameter	Φ450 – Φ550 mm
Out Diameter	1500 mm
Model	DC-MU1

2.2 Optional Upgrade: Decoiler
Motorized Decoiler	Stand structure decoiler, motorized or hydraulic	Hydraulic decoiler with loading car

2.3 Guiding Device With Pre-Cut Broaching Shear
Guiding Roller	Adujust the coil feeding width
Pre-cut Broaching Shear	Cut the steel coil before roll forming
Digital Display	See the feeding width directly

2.4 Roll Forming Machine
Working Speed	Around 20 m/min
Structure	Wall panel type. Optional: Cast-iron stands or guide pillar
Driving System	Chain system. Optional: Gearbox
No. of Forming Stations	18 stands
Shaft Diameter	70mm solid shaft
Motor Power	5.5 Kw
Roller Material	45# steel polished and chromed HRC58-62°
Shaft Material	High grade 45# steel polished(CNC lathe)
Steel Coil Material	PPGI or GI
Steel Coil Thickness	0.25-0.8mm

2.5 Optional Upgrade: Cover
Mounted On The Inside: No Cover Required	Solid Cover For Chain	Mesh Safety Cover

2.6 Cutter
Common Power Type	Hydraulic. Optional: motor type.
Hydraulic Power	4-5.5Kw, customizable
Blade Material	Cr12 Mov
Hardness	With quenched treatment HRC 58 – 62°

2.7 Product Collection
Solution 1	Run-out table	Solution 2	Auto stacker
Power Type	Non-powered, mainly manual handling	Power Type	Motorized, 3Kw
Dimension	Length 4m, customizable	Dimension	Length 4m-6m, customizable

2.9 Hydraulic Power Unit (HPU)
Motor Power	5.5Kw
Oil Required	N32 or N46 hydraulic oil is available
Design	The hydraulic station has a fan cooling system
Optional	It can be installed on or inside the roll former to save space

3. Production Line Components

4. Customization Options

We offer customizable configurations tailored for this double-layer roof panel roll forming machine, including adjustable roll former tooling to switch between trapezoidal and corrugated profiles, variable hydraulic cutter lengths, coil width adaptability, and optional automation upgrades for loading/unloading. Customized safety guards and control systems ensure compliance with client-specific production demands.

Metalign is a trusted manufacturer specializing in cold roll forming machine production and custom roll forming solutions. Located in Botou City, the heart of China’s roll forming industry, we bring over 30 years of combined technical and engineering experience to every project.

Our team is dedicated to designing and building precision roll forming lines tailored to your profile needs — from roofing and purlin lines to shelving, door frames, highway guardrails, and more. We are known for our practical designs, robust structures, and responsive after-sales support.

With a strong reputation in global markets including North America, Europe, Southeast Asia, and the Middle East, Metalign is committed to helping customers improve efficiency, reduce costs, and gain a competitive edge.