The LN300 3.0mm automatic C/Z purlin machine is a heavy-duty, fully automated CZ purlin manufacturing solution engineered for modern PEB (Pre-Engineered Building) infrastructure and high-load steel structures. Capable of processing galvanized steel up to 3.0mm in thickness, this versatile machine effortlessly delivers a wide range of custom-sized C and Z profiles through a fully automated production line.
Flow chart: Decoiler → Feeding & Leveling Guide → Pre-Punching & Pre-Cutting → Roll Forming System → Hydraulic Post-Cutting → Run-out Table
Product Spec
Main Components
| Mechanical De-coiler | De-coiler Type: by manual Weight capacity: 5T |
| Feeding and Leveling Device | It used for making the material flat before feeding into the roll forming machine |
| Pre-punching device | Punching type: by hydraulic Punching quantity: total 3 sets cylinders 6holes. (Can be increased by customize) |
| Pre-shearing | It used to cut raw materials before roll forming |
| Main roll former | Driven type: By Chains( double chains, 24A) Speed of forming: 0-30m/min Working Speed: 12-18m/min Roller: About 21 groups rollers Roller Material is Cr12 mould steel; Shaft: Shafts of rollers are tooled by grinding machine for two times to ensure the precision of final product. Material of main shaft is 40Cr. Changing sizes: Full-automatic (change sizes automatically by PLC control, pressing button is compatible) Adopt fast C/Z interchanging system Quick C/Z interchanging only with 3 steps,around 5mins |
| Hydraulic Post- cutting | No need to replace the cutting blades when purlin sizes are changed |
| Product support frame | |
| Control System |
Key Features
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3.0mm Heavy-Duty Capacity Engineered to process galvanized steel up to 3.0mm, delivering high-strength purlins built for extreme structural stress in large-span PEB infrastructure.
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Seamless C/Z Interchange Switch production between C and Z profiles seamlessly without re-adjusting roller structures, slashing downtime and maximizing factory throughput.
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Stepless Size Changeover Features fully automated, millimetric stepless size adjustments via PLC touch screen, eliminating manual roller changes for custom-sized purlins.
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Precision Inline Punching Integrated multi-station hydraulic inline punching ensures perfectly aligned bolt holes for rapid, error-free on-site assembly.
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Enterprise-Grade Durability Built with premium alloy steel rollers (Cr12/GCr15) and an ultra-rigid welded frame to guarantee stable, vibration-free operation for decades.
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Smart Siemens/Mitsubishi PLC An intuitive, multi-language automated control system allows a single operator to safely manage production from decoiling to stacking.
Technical Specifications
| Machine Specifications | |
| Weight | About 13 tons |
| Size | About 11.5m x1.65m x 1.7m
(length x width x height) |
| Color | Main color: blue |
| Warning color: yellow | |
| Suitable Raw Material | |
| Material | cold rolled coil , hot rolled coil, galvanized coil |
| Thickness | 1.0-3.0mm |
| Coil width | According to products size |
| Yield strength | Q195,Q235,Q345 |
| Main Technical Parameters | |
| Quantity of forming rollers stations | 21 Stations |
| Diameter of rollers | ø320MM |
| Diameter of shafts | ø75/ø90mm |
| Roll Forming Speed | 0-30m/min |
| Production Speed | 12-18m/min(depends on quantity of punching) |
| Forming rollers material | CR12 mould steel, with quenched treatment |
| Cutter material | CR12 mould steel, with quenched treatment |
| Controlling system | PLC and Converter |
| Electric power requirement*** | Main motor power: 22KW |
| Hydraulic unit motor power: 7.5KW | |
| Electric voltage | According to customers requirement |
NOTE: Upgradeable SERVO MOTOR+ laptop control
Machine Video
Applications
Multi-Span PEB Infrastructure
Production of high-strength 3.0mm C/Z purlins for primary secondary framing in wide-span industrial workshops and pre-engineered buildings requiring high load-bearing capacity under structural stress.
Aviation Hangars & Logistics Hubs
Fabrication of heavy-gauge profiles for industrial structures with wide clear spans. The 3.0mm thickness ensures the required strength-to-weight ratio to meet structural wind and snow load specifications.
Crane Bays & Heavy Machinery Plants
Rolling of thick-walled steel components engineered for structural framing in manufacturing facilities equipped with overhead cranes, providing resistance to continuous operational vibrations and structural fatigue.
Bolt-Interlocked Steel Frameworks
Manufacturing of structural purlins for fast-track steel construction with pre-engineered bolt connections. The integrated inline punching system delivers precise hole alignment on 3.0mm steel to ensure direct on-site installation without manual drilling.
