LN400 automatic C/Z purlin roll forming machine, which is a high-speed interchangeable C & Z purlin roll former with patented stepless size change structure. It is equipped with 12 sets of C/Z conversion modules.
You only need to rotate the module by 180° to switch between C purlin and Z purlin without removing any rollers. One machine covers all common sizes of purlins for steel structure workshops and solar bracket projects.
Main Components
- Hydraulicde-coiler ——————————————————- 1 set
- Leveling Device ———————————————————– 1 set
- Pre-PunchingDevice —————————————————– 1 set
- Roll Forming System—————————————————— 1set
- Post-PunchingDevice —————————————————- 1 set
- Cutting Device————————————————————-1 set
- Online Printer————————————————————– 1 set
- PLC Control System—————————————————— 1 set
- Hydraulic Station———————————————————- 1 set
- Out-let Table—————————————————————1 set
Key Features
- Fast Size Change: No roller replacement is required. Web width can be adjusted steplessly by computer with one-click control.
- Web Width Range: C purlin 100–400 mm, Z purlin 120–400 mm. Flange and lip dimensions are adjusted automatically at the same time, helping reduce downtime during profile changeovers.
- Stable High-Speed Operation: A high-power servo motor drives the main system. Maximum line speed reaches 36 m/min, while working speed with punching remains at 15–22 m/min. The machine is equipped with 24 forming stands to help maintain straight, stable profiles with minimal distortion.
- Precision Heavy-Duty Configuration: Main Shaft: Made of 40Cr quenched and tempered alloy steel, with shaft diameters of φ90/φ75 for high rigidity and bending resistance. Rollers: Made of Cr12 die steel with quenching and polishing treatment for improved wear resistance and smooth contact with galvanized steel strips. Control System: Uses a Windows-based industrial computer. Supports USB order import, remote parameter transmission, and connection with production management software. Length and hole-position tolerance can be controlled within ±1 mm.
- Integrated Punching & Cutting: The full line automatically completes uncoiling, punching, forming, and fixed-length cutting in one continuous process, reducing manual operation.
Technical Specifications
| Item | Specification |
| Model | LN400 CZ Purlin Roll Forming Machine |
| Finished Product | C Purlin: 100–400mm; Z Purlin: 120–400mm |
| Raw Material | Galvanized steel coil, black steel coil, Q235 / Q345 |
| Material Thickness | 1.5mm～4.0mm |
| Forming Stands | 24 sets |
| Line Speed | Max 36 m/min; practical speed 15–22 m/min |
| Drive System | AC servo main drive |
| Control Mode | Windows industrial PC, fully automatic stepless adjustment |
| Cutting Mode | Hydraulic universal cutting |
| Total Weight | About 16 tons |
| Optional Decoiler | 6‑ton hydraulic uncoiler or customized |
FAQ
What is the LN400 C/Z purlin roll forming machine?
The LN400 is a heavy-duty automatic C/Z purlin roll forming machine designed to manufacture structural steel purlins from 1.5–4.0 mm steel coils. It integrates decoiling, leveling, punching, roll forming, cutting, and PLC control into one automated production line.
What profile sizes can the LN400 produce?
The LN400 produces multiple C and Z purlin sizes with automatic width adjustment. Operators can change profile dimensions directly through the PLC control system without replacing forming rollers, making the machine ideal for flexible production.
What materials can the LN400 process?
The machine is suitable for galvanized steel, cold-rolled steel, hot-rolled steel, and other structural steel coils with thicknesses from 1.5 mm to 4.0 mm, depending on the required profile specifications.
Does the LN400 automatically switch between C and Z purlins?
Yes. The LN400 features an automatic C/Z interchange system that allows quick profile conversion without changing the forming rollers. This significantly reduces changeover time and improves production efficiency.
Does the machine include punching and cutting?
Yes. The production line integrates hydraulic punching and hydraulic cutting with PLC control. Hole patterns, cutting length, and production parameters can be programmed according to customer requirements for continuous automated manufacturing.
Machine Video
Applications
Steel Structure Manufacturing
Produce heavy-duty C and Z purlins for industrial buildings, warehouses, factories, and commercial structures. The LN400 automatically changes profile sizes and switches between C and Z sections, helping manufacturers increase productivity while reducing setup time.
Industrial & Agricultural Buildings
Designed for large-span steel structures such as logistics centers, production facilities, agricultural buildings, and storage warehouses. High-strength purlins up to 4.0 mm provide reliable structural support and consistent dimensional accuracy for demanding construction projects.
Solar PV Mounting Structures
Manufacture precision C and Z profiles for solar mounting systems with integrated punching and automatic length control. Continuous production, accurate hole positioning, and flexible profile adjustment improve installation efficiency for utility-scale and commercial solar projects.
