The SX20 automatic C/Z purlin roll forming machine solutionis the advanced evolutionary model of our classic SX10. Specially engineered for high-efficiency steel structure production, the SX20 introduces Pre-Punching (replacing post-punching) and an integrated Pre-Shearing function. This smart upgrade significantly reduces material waste, ensures high-precision hole alignment, and delivers ultimate cost-effectiveness for factory owners.
De-coiler ➔ Feeding & Leveling ➔ Pre-Punching & Pre-Shearing ➔ Roll Forming System ➔ Run-out Table (Product Support)
(Power & Control Support: Central Hydraulic Station & Intelligence PLC Control System)
Product Spec
Main Components
| Mechanical De-coiler | By manual, 5T |
| Feeding and Leveling Device | Used for making the material flat before feeding into the roll forming machine |
| Pre-punching Device | By hydraulic, total 2 sets cylinders 3-4holes. (Can be increased by customize) |
| Pre-shearing | Used to cut raw materials before roll forming |
| Main Roll Former | Driven type: By chains Speed of forming: 0-30m/min Working Speed: 12-18m/min Roller: About 18 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 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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High Strength & Light Weight: Ideal for large-span, super-high, and heavy-duty buildings.
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Superior Reliability: Excellent plasticity and toughness to withstand dynamic loads and seismic activity.
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Rapid Construction: Highly industrialized components mean faster on-site installation and lower labor costs.
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Flexibility in Design: Easily customizable shapes to fit complex engineering blueprints.
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Unmatched Economy: Maximum structural stability at a highly reasonable investment.
Technical Specifications
| Machine Specifications | |
| Weight | About 9800 kgs |
| Size | About 10.5m 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 | 18 Stations |
| Diameter of rollers | ø260MM |
| Diameter of shafts | ø75/ø90mm |
| Roll Forming Speed | 0-25m/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:18.5KW |
| Hydraulic unit motor power: 7.5KW | |
| Electric voltage | According to customers requirement |
FAQ
What is the difference between C and Z purlins?
A C purlin has a C-shaped section with both flanges on the same side, while a Z purlin has flanges on opposite sides so sections can nest and lap for better load transfer on long spans. C purlins suit shorter spans and simple framing; Z purlins suit longer, continuous roofs. The SX20 produces both on one machine.
How long does it take to switch from C to Z profile?
About 5 minutes. The SX20 uses a fast C/Z interchanging system that needs only 3 steps to change profiles, and the cutting blades do not need to be replaced.
What steel thickness can the SX20 process?
1.0 mm to 3.0 mm, in cold rolled, hot rolled, or galvanized coil, with steel grades Q195, Q235, and Q345.
What is the production speed of the SX20?
Working speed is 12 to 18 m/min, with a maximum forming speed of 25 m/min, depending on the number of holes being punched.
What is pre-punching on a purlin machine?
Pre-punching punches holes into the flat steel strip before roll forming, instead of after. It improves hole alignment accuracy and reduces material waste. The SX20 comes with pre-punching and pre-shearing as standard.
How much does a purlin roll forming machine cost?
The price depends on configuration: material thickness, punching system, de-coiler, and controls. The SX20 is a 3.0 mm automatic C/Z machine with pre-punching and PLC control. Contact sales@metoform.com with your purlin sizes and output target for a quotation.
Can the SX20 make custom purlin sizes?
Yes. The forming rollers and PLC control are configured for your target purlin sizes, and the punching system can be customized for more holes per section.
Machine Video
Applications
Industrial Warehouses & Manufacturing Plants
Used as robust horizontal roof purlins and vertical wall girts to support heavy cladding and withstand extreme wind loads.
Pre-Engineered Buildings (PEB)
Seamlessly integrates into PEB engineering workflows, providing standardized, pre-punched C/Z channels for rapid on-site bolted assembly.
Commercial Steel Structures
Ideal for airplane hangars, logistical distribution centers, shopping malls, and large-span sports arenas.
Agricultural Buildings
Extensively applied in the construction of prefabricated poultry farms, grain storage facilities, and livestock sheds.
Solar Ground Mounting Systems
Heavy-duty 3.0mm C-channels produced by the SX20 are widely utilized as structural posts and racking supports for large-scale solar PV arrays.
