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 needed. The web width can be adjusted steplessly via computer with one click.
Web width range: C purlin 100–400mm, Z purlin 120–400mm.
Flange and lip sizes will be adjusted synchronously automatically, which greatly reduces downtime for specification change.
Stable High-speed Operation
It adopts high-power servo motor for main drive. The maximum line speed reaches 36 m/min, and the comprehensive working speed with punching keeps 15–22 m/min.
There are 24 forming stands in total, ensuring the finished profile keeps straight without distortion.
Precision Heavy-duty Configuration
Main shaft: 40Cr quenched and tempered alloy steel, shaft diameter φ90/φ75, high rigidity and anti-bending.
Rollers: Made of Cr12 die steel with quenching and polishing treatment, wear-resistant and no scratches on galvanized strips.
Control system: Windows industrial computer. It supports importing orders via USB and remote parameter transmission, and can connect with production management software. The tolerance of length and hole position is controlled within ±1mm.
Integrated Punching & Cutting
The whole line automatically completes uncoiling, punching, forming and fixed-length cutting continuously with unattended 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.
