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
FAQ
What is the LN300 designed for?
It is built for modern PEB (pre-engineered building) infrastructure and high-load steel structures. The heavy-duty line produces custom-sized C and Z profiles for large-span buildings where the purlins carry serious structural stress.
How many forming stations does the LN300 have?
About 21 groups of forming rollers, driven by double chains (24A). The rollers are Cr12 mould steel, and the 40Cr shafts are ground twice for precision. This heavier build is what gives the LN300 its 3.0 mm capacity.
What is the punching capacity of the LN300?
The hydraulic pre-punching device comes with 3 sets of cylinders for 6 holes as standard, and the hole count can be increased by customization. Multi-station inline punching keeps bolt holes perfectly aligned for fast on-site assembly.
Which PLC system does the LN300 use?
A smart Siemens or Mitsubishi PLC with a multi-language interface. A single operator can manage the whole line, from decoiling to stacking, through one control system.
What is the weight of the LN300?
About 13 tons. The ultra-rigid welded frame and premium alloy steel rollers keep the machine stable and vibration-free during high-speed runs, which is what the PEB workload demands.
What steel thickness can the LN300 process?
Galvanized steel up to 3.0 mm, along with cold rolled and hot rolled coil. The machine is engineered for the high-strength purlins used in extreme structural applications.
How many operators does the LN300 need?
One. Between the Siemens/Mitsubishi PLC, the automatic size change, and the stepless adjustment via touchscreen, the LN300 is designed so a single operator safely runs the full production flow.
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.
