Sigma Purlin Roll Forming Machine

A: The standard model processes galvanized steel coil from 1.5 mm to 3.0 mm thickness. Specialized heavy-gauge configurations are available to handle material up to 6.0 mm thick—suitable for high-load structural sigma purlins in industrial and warehouse applications.

The 3-in-1 system integrates three typically separate machines—uncoiler, leveler, and servo feeder—into one continuous automated line. This eliminates manual material handling between stations, reduces coil changeover time with tool-free loading, and synchronizes feed speed with the roll forming mill. Combined with the flying hydraulic cutting system (which cuts without stopping production), the line achieves 50% higher daily output compared to conventional stop-cut purlin machines operating at similar speeds.

Yes. The machine produces sigma purlins with heights ranging from 80 mm to 300 mm, with custom heights up to 400 mm available on request. Flange height is adjustable from 50 mm to 100 mm. The servo-driven control system allows operators to switch between purlin profiles with minimal mechanical adjustment, making the machine suitable for manufacturers serving multiple construction specifications.

The flying hydraulic cutting system synchronizes the cutting blade with the moving material, allowing clean and precise cuts at speeds up to 15 m/min without pausing the production line. This is the key feature that enables continuous operation and is directly responsible for the machine’s high-output capability. In contrast, standard stop-shear cutting requires the line to pause at each cut cycle, reducing effective throughput by 30–40%.

The forming rollers are precision-machined from D2 steel (GCr15 bearing steel as standard, D2 tool steel as upgrade option). With proper lubrication and scheduled maintenance, D2 steel rollers have a service life exceeding 10 years under continuous industrial operation. The gear box transmission drive—rather than chain drive—ensures even torque distribution across all 18–24 forming stands, further reducing roller wear.

No. The machine features a touchscreen PLC controller (Siemens or Mitsubishi, operator-selectable) with real-time monitoring, fault logging, and production data export. Operators can be trained to standard proficiency within 1–2 days. Routine maintenance tasks—including lubrication and roller inspection—are accessible without disassembly of major components. Believe Industry provides full operation manuals, video tutorials, and remote technical support.

 Yes. The machine is optimized for galvanized steel coil (GI), which is the most common material for construction-grade sigma purlins. It is also compatible with stainless steel coil and aluminum coil with appropriate roller and punch tooling. Customers should specify the target material during order to ensure correct roller hardness and punch configuration.

The standard configuration is 380V / 50Hz / 3-phase (China/Europe standard). Believe Industry offers alternative voltage configurations including 415V/50Hz/3Ph (UK/Australia) and 220V/60Hz/3Ph (Americas). Customers are requested to confirm local power supply specifications at the time of order. Believe Industry’s engineering team configures the control panel, motors, and hydraulic system to match the specified voltage during manufacturing.

Standard production lead time is 90–120 working days from receipt of deposit payment and confirmed technical drawings. The complete machine is disassembled into shipping sections, packed in fumigation-free wooden crates, and exported by sea freight (FCL). Believe Industry provides full export documentation including commercial invoice, packing list, bill of lading, and CE certificate. Typical sea transit time is 15–35 days depending on destination port. Customers in the Middle East, Southeast Asia, and Africa typically receive machines within 75–90 days from order placement.

The Sigma Purlin Roll Forming Machine is a custom-engineered product; pricing depends on configuration, forming stand count, automation level, and optional accessories (automatic stacker, online measuring system, additional tooling sets). Entry-level configurations start at approximately USD 35,000–50,000 FOB China. Full automatic lines with heavy-gauge capability and auto stacker typically range from USD 200,000–300,000. Contact Believe Industry at enquiry@belirollforming.com for a formal quotation based on your specific production requirements.

Sigma purlins produced by this machine are used as primary load-bearing structural members across a broad range of construction sectors:

• Industrial warehouses and logistics centers—sigma purlins span roof and wall framing for large clear-span structures;
• Pre-engineered steel buildings—sigma is the preferred purlin profile for high-load roof systems requiring spans above 10 meters;
• Agricultural buildings—grain storage, equipment sheds, and livestock facilities;
• Commercial buildings—retail parks, car showrooms, and distribution hubs; 
• Solar and photovoltaic structures—sigma profiles are increasingly used in ground-mounted solar panel support frameworks due to their high strength-to-weight ratio.

es. Believe Industry’s Sigma Purlin Roll Forming Machine is CE certified, meeting EU Machinery Directive 2006/42/EC requirements for mechanical safety, electrical safety (EN 60204-1), and noise levels. A CE Declaration of Conformity is provided with each machine. For customers in markets requiring additional certifications, Believe Industry can arrange third-party pre-shipment inspection (SGS, BV, or TÜV) at the factory in Wuxi.

Believe Industry provides comprehensive installation and commissioning support. Upon arrival at the customer’s facility, the machine is assembled according to the detailed installation manual and video guide provided (available in English and Chinese). Believe Industry’s engineers can travel on-site to supervise installation and provide hands-on commissioning training—typically 5–7 days on-site. For customers who prefer remote support, Believe Industry offers live video-guided commissioning via WhatsApp or WeChat, supported by pre-wired modular electrical connections that simplify on-site assembly. Installation typically takes 3–5 days for an experienced local team.

The complete 3-in-1 line (uncoiler + leveler + punch + roll forming mill + flying cut + auto stacker) requires a minimum floor space of approximately 55 meters (length) × 8 meters (width) with a ceiling height of at least 4.5 meters. A reinforced concrete floor rated at minimum 15 kN/m² is recommended. Additional space of 10–15 meters at the output end is recommended for stacking finished sigma purlin bundles and operating a forklift. Total factory floor area typically needed: 500–700 m².

ROI depends on local purlin pricing, production volume, and operating costs. As a reference: a machine producing 6 m/min × 8 hours/day × 22 working days/month yields approximately 6,336 meters of sigma purlin per month. At a conservative finished purlin sale price of USD 0.80–1.20 per meter (market-dependent), monthly revenue from one machine is approximately USD 5,000–7,600. Based on a machine cost of USD 60,000–80,000, typical payback period is 12–24 months for single-shift operation, or 8–15 months for double-shift operation. These figures are indicative; Believe Industry can provide a customized ROI model on request.

The machine is designed for continuous industrial operation and can run two shifts (16 hours/day) or three shifts (24 hours/day) with appropriate crew rotation. Scheduled preventive maintenance—including lubrication, roller gap inspection, and hydraulic oil check—is recommended every 500 operating hours (approximately 3 months on double-shift). The PLC system logs operating hours and can be configured to display maintenance alerts. There are no consumable dies or cutting blades that wear rapidly; the D2 steel rollers and hydraulic cutting blade have service lives measured in years, not weeks.

Believe Industry recommends stocking the following spare parts for uninterrupted production:

1. Hydraulic seals and O-rings for the cutting cylinder (typically replaced every 6–12 months under heavy use); 
2. Proximity sensors and position switches (2–3 spare units); 
3. One complete set of punch tooling (upper and lower dies for each hole pattern); 
4. One spare servo encoder for the feeder drive. A standard spare parts package is available from Believe Industry and is recommended to be shipped with the machine to minimize downtime risk.

• Purchasing a Sigma Purlin Roll Forming Machine enables in-house sigma purlin production, which is economically advantageous when monthly consumption exceeds approximately 15–20 tons. Key advantages of in-house production over buying from service centers include: Raw material (steel coil) costs 30–45% less per ton than finished purlin from a service center; 
• Custom lengths on demand—no minimum order quantity, no off-cut waste; 
• Faster delivery to job site—produce to order within hours, not days; 
• Ability to produce non-standard profiles and thicknesses not readily available from stock. For steel fabricators and construction companies with consistent monthly purlin demand, in-house production typically achieves full ROI within 12–18 months.

Beli RollForming is a direct manufacturer—not a trading company—with a 10,000 m² factory in Wuxi. Key differentiators: 3-in-1 integrated design (reducing installation time by 50%), D2 tool steel rollers with 10+ year service life, flying hydraulic cutting (not stop-shear), CE certification, 5+ hours of video training included, spare parts package shipped with every order, and 18-month warranty with 24-hour technical support response.

 Beli machines offer the same core specifications as US/European manufacturers—3-in-1 integrated design, flying hydraulic cutting, D2 steel rollers—at approximately 25–40% of the price ($5,000–30$0,000 vs $180,000–$500,000+). Lead time is 90–120 working days versus 6–12 months. Beli provides full CE certification, optional pre-shipment inspection (SGS/BV/TÜV), and remote PLC diagnostics via TeamViewer.