Automatic C-Z Purlin Roll Forming Machine Complete Guide
Here at ZHENG LIMING MACHINERY, we are a seasoned Chinese manufacturer that specializes in full set cold roll forming equipment for metal sheets. Our premium grade purlin roll forming machines serve global steel construction clients with reliable, fully automated production lines, ideal for warehouse, metal building and photovoltaic support purlin production.
What Is a Purlin Roll - Forming Machine
In steel structure buildings, purlins act as critical roof framing members running parallel to roof eaves for supporting metal roof panels.
A purlin roll forming machine fabricates steel purlins with varied cross section profiles. During the roll forming workflow, raw metal strips go through multiple groups of forming rollers and get shaped into continuous finished profiles.
Our ZHENG LIMING multi functional purlin equipment manufactures C shaped, Z shaped, U shaped and Sigma steel sections. Multiple configurable sizes and high accuracy punching units are supported, meeting diversified requirements from modern structural steel construction projects.
The standing seam lock bite between the panels, with no exposed screws on the roof, eliminating the potential leakage hazard caused by screws at the source.
Types of Purlin Profiles: C, Z, U, and Sigma
In the steel industry, specific nomenclature is assigned to structural shapes to simplify drawings and engineering documentation:
| Profile Type | Cross Section | Primary Application | Key Feature |
| C Purlin | Channel shape with stiffened flanges | Wall framing, floor joists, light structural framing | Flange stiffeners increase load capacity |
| Z Purlin | Z shape with overlapping ends | Roof framing, continuous span applications | Overlapping design enables continuous load transfer |
| U Purlin | Simple channel without stiffeners | Light structural support, bracing members | Economical for lighter loads |
| Sigma Purlin | Custom engineered profile | Specialized structural requirements | Tailored to specific project needs |
Core Benefits of Our Purlin Forming Machine
Efficiency–Maximize Your Production Output
- Full automatic operation and fast profile switch design cut down manual adjustment downtime. Lower manufacturing costs help you stay competitive within your local market.
- Non stop continuous production: The roll forming line supports endless length profile fabrication, enabling non stop production and on time project delivery.
Quality – Precision Engineering for Consistent Results
- Stable and consistent profile quality: Precision machining and steady running forming assemblies guarantee uniform finished section dimensions and reliable long term product quality.
- High precision machining and custom made punching: Every finished steel purlin keeps tight dimensional tolerance. Multiple hole patterns are available for customization, including flange holes, bottom holes and plum blossom holes.
Cost Savings–Reduce Labor and Material Waste
- Reduced labour expense and human made errors: Automated workflows minimize manual participation. Human caused mistakes are greatly reduced while overall throughput gets improved.
- Less raw material waste: Equipped with hydraulic front shears and guillotine type cutting heads, the equipment trims sheet metal ends neatly and reduces leftover scrap material. Rear cutting units deliver clean, burr free finished profiles.
Flexibility–Adapt to Any Project Requirement
- Stepless automatic size adjustment for C Z profiles: Our intelligent control system enables seamless switching between C type and Z type purlins without manual disassembly and roller replacement. Fast parameter adjustment adapts the machine for varied production orders.
- Customization service: We provide tailored roll forming solutions for varied profile widths, punching layouts and cutting configurations.
Automatic Change Over VS Manual Adjust Purlin Machine
Both machine versions process C section, Z section and U section purlins within the size range 100–300 mm.
| Comparison | Manual Type Change | Automatic Type Change | Advantage |
| Changeover Method | Workers manually replace bushings when switching profiles | PLC controlled one touch profile change, no manual bushing replacement | ✅ Automatic |
| Changeover Time | 20-40 minutes | 3-5 minutes | ✅ Automatic |
| Applicable Sizes | C100-C300, Z100-300, U100-300 | C100-C300, Z100-300, U100-300 | -- |
| Best For | Fixed specifications, high-volume mass production | Multi profile, small-batch, frequent changeover production | ✅ Automatic |
| Equipment Cost | Lower (economical option) | Higher (better ROI for flexible production) | ✅ Manual |
| Labor Dependency | Requires skilled operators for changeover | Minimal human intervention — PLC controls everything | ✅ Automatic |
| Precision Consistency | Dependent on operator skill level | PLC controlled, consistent precision every time | ✅ Automatic |
| Punching Capability | Flange holes, plum blossom holes, and various patterns | Flange holes, plum blossom holes, and various patterns | -- |
| Tooling Equipment | Can be equipped with follow on shears, universal shears | Can be equipped with follow-on shears, universal shears | -- |
| Recommended For | Customers with large volume, fixed specification production | Customers with diverse orders and high flexibility requirements | ✅ Automatic |
Key Insight: While manual type change machines are more economical upfront, the automatic type change machine pays for itself within 12 18 months through reduced downtime, lower labor costs, and the ability to accept more diverse customer orders.
Key Technical Specifications
| Parameter | Specification |
| Material Thickness | 1.5–3.0 mm |
| C Purlin Web Width | C80–300 mm |
| C Purlin Flange Height | 40–100 mm |
| Z Purlin Web Width | 120–300 mm |
| Z Purlin Flange Height | 50–100 mm |
| Production Speed | 8–25 m/min |
| Roller Material | GCr15 bearing steel, hard chrome plated |
| Roller Hardness | HRC 58-62 |
| Control System | Siemens PLC with touch screen |
| Profile Types | C, Z, U, Sigma (interchangeable) |
| Changeover Type | Automatic / Manual optional |
| Punching Capacity | Bottom holes, flange holes, plum blossom holes, custom patterns |
| Cutting System | Hydraulic shear (flying shear optional) |
| Optional Equipment | Follow on shears, universal shears, stacker |
Key Machine Features
- Full auto workflow from metal coil feeding up to finished purlin output, cutting down manual operations and boosting running stability.
- PLC powered stepless profile switching between C type and Z type sections.
- One touch fast parameter adjustment to accommodate custom sized profiles.
- High precision forming units for stable, uniform finished steel dimensions.
Frequently Asked Questions About Purlin Machine
Q1: What is the difference between C purlin and Z purlin?
A1: C purlins feature a simple C shaped cross section with stiffened flanges — commonly used for wall framing, floor joists, and light structural applications. Z purlins have a Z shaped cross section with overlapping ends — ideal for roof framing as the overlapping design enables continuous load transfer across multiple spans. Quick guide: Choose C purlin for wall framing and single span applications; choose Z purlin for roof framing and multi span continuous structures.
Q2: Can your purlin machine switch between C and Z profiles automatically?
A2: Yes. Our automatic size changing purlin machine switches between C, Z, U, and sigma profiles via PLC one click parameter setup — no manual bushing replacement or roller changes required. Changeover takes only 3 5 minutes.
Q3: What materials can your purlin machine process?
A3: Our purlin roll forming machine processes galvanized steel, cold rolled steel, hot rolled steel, and high strength low alloy steel (HSLA). The standard thickness range is 1.5 3.0mm, with customized configurations available for thicker materials upon request. Send us your drawings or technical specifications for a free feasibility assessment.
Q4: What after sales support does Zheng Liming provide for overseas customers?
A4: We provide overseas engineer on site installation guidance, operator training at your facility, 12 month warranty on core components, remote video call technical support, and lifelong technical consultation — ensuring your production runs smoothly from day one.
Q5: What is the price of a purlin roll forming machine?
A5: Pricing depends on configuration (manual vs automatic changeover, punching options, material thickness capacity, and optional equipment like stackers or flying shears). Contact us with your specific requirements and production volume — we will provide a factory direct quotation tailored to your project.
Q6: What is your typical lead time for purlin roll forming machine?
A6: Standard models take 45 60 working days. Custom built lines require 60 90 working days. Contact us to get an exact schedule for your order.
Get Your Free Purlin Machine Quotation
If you are looking for a durable, high speed purlin roll forming machine with automatic size change capability, contact Zheng Liming Machinery today.
Get free technical drawings and factory price quotation
Global service coverage: 96 countries | 500+ projects | 140+ patents | Since 1989
Zheng Liming Machinery has been a trusted purlin roll forming machine manufacturer since 1989. Our C/Z/U profile roll forming equipment is used by steel structure manufacturers worldwide for automated, high precision purlin production.
