The LS300 automatic C/U purlin machine is an industry-leading, heavy-duty C-section steel production line engineered for maximum efficiency and precision. Serving as a fully automatic solution, it seamlessly processes high-tensile steel into premium C-beams with a web size continuously adjustable from 75mm to 300mm.
Products manufactured by the LS300 deliver exceptional straightness and superior bending resistance, ensuring they meet the most rigorous structural standards. With integrated automatic length cutting and inline punching, this machine guarantees high-speed throughput and labor-saving operation.
Flow chart: Heavy-Duty Decoiler ➔ Precision Feeding & Leveling ➔ High-Speed Pre-Punching System ➔ Pre-Shearing Unit ➔ Continuous Roll Forming ➔ Post-Cutting System ➔ Product Run-out Table
Product Spec
Main Components
| Mechanical De-coiler | De-coiler Type: by manual Weight capacity: 4T |
| Feeding and Leveling Device | It used for making the material flat before feeding into the roll forming machine |
| Pre-shearing | It used to cut raw materials before roll forming |
| Main roll forming machine | Driven type: By Chains Speed of forming: 0-25m/min Working Speed: 12-16m/min Roller: About 15 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: Change sizes automatically by pressing button |
| Post punching device | Punching type: by hydraulic Punching quantity: total 2sets cylinders 3 or 4holes. (Can be increased by customize) |
| 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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Millimetric Stepless Adjustment: Easily switch to any web size between 75mm and 300mm via the PLC touchscreen, eliminating manual roller changes and downtime.
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Fully Automated Processing: Achieve high-precision automatic inline punching and exact-length cutting in one continuous operation.
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Heavy-Duty Profile Output: Produces industrial-grade C-beams with unparalleled flatness, perfect straightness, and excellent load-bearing capacity.
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Plug-and-Play Installation: The structural design of the machine allows for rapid factory setup and easy everyday maintenance.
Technical Specifications
| Machine Specifications | |
| Weight | About 8500 KG |
| Main Machine Size | About 11.5m x1.65m x 1.7m
(length x width x height) |
| Color | Main color: blue |
| Warning color: yellow and orange | |
| 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 | 15-16 Stations |
| Diameter of rollers | ø160MM |
| Diameter of shafts | ø75/ø80mm |
| Roll Forming Speed | 0-25m/min |
| Production Speed | 12-16m/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: 18.5KW |
| Hydraulic unit motor power: 7.5KW | |
| Electric voltage | According to customers requirement |
FAQ
What web sizes can the LS300 produce?
The web size is continuously adjustable from 75 mm to 300 mm. The LS300 is a heavy-duty C-section line, so it forms industrial-grade C-beams across that full range without manual roller changes.
How do I change the size on the LS300?
Through the PLC touchscreen. The millimetric stepless adjustment switches to any web size between 75 mm and 300 mm electronically, so there is no downtime for manual roller changes.
What is the difference between a C-beam and a purlin?
A purlin is a light structural section used as roof and wall support in steel buildings. A C-beam, as produced by the LS300, is a heavier C-section engineered for higher load-bearing duty with greater bending resistance, while sharing the same C-shaped profile family.
What steel thickness can the LS300 process?
Cold rolled, hot rolled, and galvanized coil from 1.0 mm to 3.0 mm, with yield strengths Q195, Q235, and Q345.
What is the production speed of the LS300?
Working speed is 12 to 16 m/min, with a maximum forming speed of 25 m/min, depending on the number of holes being punched.
Does the LS300 punch holes inline?
Yes. The post-punching device works by hydraulic power with 2 sets of cylinders for 3 or 4 holes as standard, and the hole count can be increased by customization.
What are the LS300 dimensions and weight?
The main machine measures about 11.5 m x 1.65 m x 1.7 m and weighs about 8,500 kg. The plug-and-play structural design allows rapid factory setup and easy routine maintenance.
Machine Video
Applications
Heavy-Gauge Structural Framing
The LS300 specializes in processing high-tensile steel up to 3.0mm thick into high-load C-beams. Its superior bending resistance makes it perfect for primary structural columns and multi-story framing grids.
Variable-Span PEB Engineering
With a 75-300mm millimetric stepless changeover, the machine continuously adapts profiles without roller changes. It effortlessly delivers diverse, custom-sized purlins tailored for varying architectural spans and load requirements.
High-Load Logistics Hubs & Hangars
Engineered for industrial infrastructure like airplane hangars, the LS300 outputs C-sections that withstand extreme structural stress. Integrated automatic inline punching ensures precision-aligned bolt holes for rapid, error-free on-site assembly.
