Two Deck Roll Forming for Micro Calamina: A Field Note from the Shop Floor

If you’re sizing up a Corrugated Iron Roofing Sheet Making Machine, here’s what I’ve seen lately: demand is shifting to compact, two-deck lines that can switch profiles without stopping production. It sounds simple; in practice, it’s a small revolution for roofing mills chasing throughput and flexibility.

What This Machine Actually Is

Product name: Two deck roll forming machine for micro calamina ondulada. Origin: SHIBAWUXING VILLAGE BO TOWN, CANGZHOU CITY, HEBEI PROVINCE. It’s a compact line with customized profile design, geared for PPGI/GI coils and the “micro calamina” corrugation commonly requested across LATAM and, increasingly, parts of Africa and Southeast Asia.

Real-World Specs (condensed)

Raw material	GI/PPGI/Alu-Zn; ASTM A653; EN 10169
Thickness range	≈0.2–0.8 mm (real-world use may vary with yield strength)
Yield strength	235–550 MPa
Line speed	≈12–18 m/min (profile-dependent)
Forming stations	Upper & lower decks; 12–18 stations each (customizable)
Cutting	Hydraulic flying cut; length accuracy ≈±0.5 mm
Controls	PLC + HMI (Siemens/Delta), IEC 60204-1 compliant
Decoiler	Manual or hydraulic; 5–7 t
Service life	10–15 years with routine maintenance; rollers 5–8 years (≈)
Certifications	ISO 9001; CE

Process Flow (how it runs day to day)

Decoiling → pinch/level → servo feeding → guiding → two-deck roll forming → hydraulic flying cut → run-out table/stack → QC. For coatings, adhesion checked per ASTM D3359; zinc per ASTM A653 G90 or local equivalent; occasional salt spray to ASTM B117 for comparative benchmarking. I’ve seen shops also do T-bend per EN 13523-7 when clients insist.

Typical industries: roofing manufacturers, prefab housing, rural building supply, disaster-relief shelters. Many customers say the dual deck saves floor space and operator time—honestly, that’s the daily win.

Why a two-deck Corrugated Iron Roofing Sheet Making Machine right now?

• Faster changeovers: two profiles on one frame.
• Lower scrap: guided feeding and matched roll geometry; I’ve seen scrap drop below ≈1.5% on steady runs.
• Energy efficiency: fewer stops/starts, smoother hydraulics.
• Compact layout: easier fit in urban sheds.

Vendor snapshot (quick comparison)

Vendor	LW Roll Forming (Cangzhou)	Trader A	Workshop B
Customization	Profile-by-profile tooling; quick-change	Limited	Basic
Certifications	ISO 9001, CE	Varies	Rare
Lead time	≈45–60 days	≈60–90 days	Uncertain
After-sales	Remote + on-site commissioning	Remote only (usually)	Ad hoc

Case notes (yes, the good stuff)

Lima, Peru: Miguel’s team switched to a two-deck Corrugated Iron Roofing Sheet Making Machine for micro-calamina plus trapezoid. Throughput up ≈30%, changeover time dropped from 40 minutes to under 10. In Nairobi, one customer reported length accuracy holding at ±0.6 mm over a 5 m sheet across a week-long run—no drama, just consistent output.

Quality and testing (what buyers quietly check)

Electrical safety aligned with IEC 60204-1; profile dimensions checked to ISO 2768-m; coating adhesion per ASTM D3359. For zinc, buyers typically request ASTM A653 G90 or regional equivalents; coil coatings reference EN 10169. Honestly, ask for test sheets and a video of the cut-to-length sequence—real-world footage tells you more than a brochure.

Final word: if space is tight and SKUs are growing, a two-deck setup from Cangzhou’s cluster is hard to beat. The blend of customization and straightforward maintenance is, well, exactly what most roofers told me they wanted.

References

1. ASTM A653/A653M – Standard Specification for Steel Sheet, Zinc-Coated (Galvanized). https://www.astm.org/a0653_a0653m.html
2. ISO 9001 – Quality management systems. https://www.iso.org/iso-9001-quality-management.html
3. IEC 60204-1 – Safety of machinery — Electrical equipment of machines. https://webstore.iec.ch/preview/info_iec60204-1%7Bed6.0%7Db.pdf
4. EN 10169 – Continuously organic coated (coil coated) steel flat products. https://standards.iteh.ai/catalog/standards/cen/b3e1c0a2-0b5d-49b4-a8ab-49a739e6c87b/en-10169