What Is an Automatic C/Z Purlin Roll Forming Machine?

An automatic C/Z purlin roll forming machine is a cold-roll-forming production line that converts steel coil into structural C-shaped and Z-shaped purlins in a single continuous process. The line typically integrates a decoiler, a leveling or straightening device, a punching station, a main multi-stage roll forming section, a hydraulic cutting system, and an output table—all governed by a PLC control system.

Purlins produced on these machines are used extensively in roofing, wall framing, and pre-engineered building systems. Because a single machine must handle two distinct cross-sections (C and Z), the switching mechanism and the range of achievable dimensions are among the most important selection factors for any buyer.

Key Selection Criteria

1. Profile Size Range and Switching Mechanism

Different projects call for different web depths and flange widths. Confirmed specifications show the following capability across SHIJIAZHUANG YINGYEE MACHINERY CO.,LTD models:

• C purlin: web 80–300 mm, flange 35–80 mm
• Z purlin: web 120–300 mm, flange 35–80 mm

Two switching approaches appear in the confirmed product range. In the PLC-controlled automatic adjustment variant, all profile dimensions are repositioned by servo-driven rollers at the touch of a screen, with no manual tooling changes required. In the manual side-roll change variant, the movable panel stand allows C-to-Z changeover by repositioning only the side roll forming tooling; the PLC still manages all length and punching parameters. Both approaches use a universal cutter that handles all sizes without a blade swap.

Buyers whose orders include frequent small-batch profile switches will benefit most from full servo-driven repositioning. Buyers running longer continuous runs of a single profile may find the manual changeover model sufficient.

2. Material Compatibility and Thickness Range

Confirmed materials across the product range include steel coil, galvanized steel, PPGI (pre-painted galvanized iron), and aluminum. Thickness coverage varies by model:

• Standard models: 0.8–3.0 mm
• Higher-capacity models: 1.2–3.0 mm (with forming speed up to 18–20 m/min)
• Broader-range model: 0.8–4.0 mm

Always match the confirmed thickness range of the chosen model to your coil specification before ordering. Running material outside the stated range can compromise profile accuracy and accelerate tooling wear.

3. Forming Speed and Production Volume

Forming speed directly determines how many linear metres of purlin a shift can produce. Two speed tiers are confirmed:

Note that the 6–8 m/min figure includes the stop-time for hydraulic punching and cutting. Actual net output depends on average purlin length and punch-hole density per piece.

4. Drive System: Chain vs. Gear

Chain transmission is the standard drive across most confirmed models and suits load profiles typical of purlin forming. A gear-drive variant is also available in the SHIJIAZHUANG YINGYEE MACHINERY CO.,LTD range for applications where higher torque consistency or reduced maintenance intervals are preferred. Both variants use the same PLC control platform.

5. Decoiler Capacity and Coil Handling

The coil feed system determines how frequently operators must reload and whether coil weight limits your run length:

• 5-tonne manual decoiler (inner dia. 440–560 mm, max coil OD 1,500 mm, max feed width 600 mm) — confirmed on the high-speed model
• 5-tonne hydraulic decoiler — confirmed on the standard-speed model

Facilities with overhead crane access for coil loading often find either configuration manageable. Facilities with limited lifting equipment should confirm the decoiler loading method at the time of ordering.

6. PLC Control System and Automation Level

All confirmed automatic models use a PLC control system (Panasonic or Mitsubishi platform noted). The confirmed control interface provides:

• Automatic length measurement and quantity counting
• Batch programming for multiple profile lengths with no material waste between batches
• Profile memory retention after a power cycle
• English-language HMI display (confirmed on the servo/high-speed model)
• Machine auto-stop during punching and cutting cycles to protect tooling accuracy

Buyers integrating the machine into a wider production workflow should confirm any data-export or fieldbus options directly with SHIJIAZHUANG YINGYEE MACHINERY CO.,LTD at the quotation stage.

7. Roll Material, Shaft Dimensions, and Tooling Life

Roll and shaft specifications affect long-term tooling durability and maintenance cost:

• Standard models: rollers from 45# steel with chrome surface; shaft diameter 70 mm, material 40Cr steel; approximately 18 roller stations
• High-speed model: rolls from GCr15 bearing steel; shaft diameters 85 mm + 65 mm; 15 forming steps
• Universal cutter blade: Cr12 or Gcr12MoV material confirmed across models; handles all C and Z profile sizes without changeover

8. Machine Footprint and Weight

Installation planning requires knowing the floor envelope and load-bearing requirement:

• Confirmed standard footprint: 10 m x 1.2 m x 1.6 m (L x W x H)
• Confirmed weight: approximately 10 tonnes (standard models) / 12 tonnes (heavier-duty model)

Verify your floor slab load rating and available linear floor space before committing to a model.

Applicable Product

SHIJIAZHUANG YINGYEE MACHINERY CO.,LTD offers the Automatic C/Z purlin roll forming machine as the primary recommended product for buyers seeking a fully automatic, PLC-driven line with servo profile-size adjustment, a universal cutter, and an integrated decoiling-leveling-punching-forming-cutting workflow. This model covers C web 80–300 mm and Z web 120–300 mm across material thicknesses from 0.8 to 4.0 mm and is designed for 24/7 continuous operation.

Additional variants in the confirmed product range address specific buyer conditions:

• High-speed model (18–20 m/min) — suited to high-volume, longer-run operations where maximising linear output per shift is the priority.
• Gear-drive model — suited to applications requiring consistent torque delivery or where chain maintenance intervals are a concern.
• Standard chain-drive model (6–8 m/min) — suited to mixed-profile fabricators with moderate batch sizes and tighter floor-space budgets.

All variants share the same working flow: Decoiler - Feeding Guide - Main Roll Forming Machine - PLC Control System - Hydraulic Punching - Hydraulic Cutting - Output Table.

Integration Fit: Questions to Answer Before Buying

Before finalising a model, buyers should be able to answer the following:

1. What is my thinnest and thickest coil? Confirm the machine's stated thickness range covers your full material spec.
2. How many profile changeovers do I perform per shift? If changeovers are frequent, servo-driven automatic adjustment eliminates downtime more effectively than manual side-roll repositioning.
3. What is my target output in metres per shift? Match this to the confirmed forming speed tier.
4. What is my coil weight and diameter? Confirm the decoiler capacity and inner/outer diameter range.
5. What voltage supply is available? All confirmed models state voltage at customer's request; your local supply must be specified at order placement.
6. What floor space and slab load capacity is available? Use the confirmed footprint and weight figures to cross-check your facility.
7. Do I need overseas installation support? SHIJIAZHUANG YINGYEE MACHINERY CO.,LTD confirms availability of overseas installation service teams; terms and costs should be confirmed at the quotation stage.

Summary

The automatic C/Z purlin roll forming machine is the right equipment class when your production requires both C and Z profile output from a single line, with PLC-managed length, punching, and cutting automation. The choice between models within the SHIJIAZHUANG YINGYEE MACHINERY CO.,LTD range comes down to confirmed criteria: profile size envelope, material thickness, required forming speed, drive preference, and decoiler capacity. No price or delivery commitment is made here; request a formal quotation with your specific coil and profile requirements.