Roof Sheet Roll Forming Machine Manufacturers
TR4 / TR5 trapezoidal, IBR, C20 / C35 and wave-effect roof sheet lines in 0.3 – 0.8 mm pre-painted or galvanised coil — 18 – 24 stations, interchangeable cassettes, 15 – 25 m/min.
A roof sheet roll forming machine turns colour-coated or galvanised coil into the trapezoidal, box-rib or narrow-rib sheet that covers industrial and residential roofs. It is the line most roofing businesses are built around, and it is also the one where the cheapest-looking quote is most often missing something: the cassette that adds the second product, the decoiler sized to your coil, or the grade of steel the rolls were cut for.
ZTRFM builds the line around 0.3 – 0.8 mm pre-painted or galvanised coil at 18 – 24 forming stations, with interchangeable roll cassettes on a single base frame so one machine covers several profile families. Everything below is the specification we quote from.
What a roof sheet roll forming line produces
A single frame carries whichever roll sets you order, and customers rarely stop at one: pairing IBR with corrugated, or TR4 with TR5, or C20 with C35, is the usual pattern. Which is the reason to decide your cassette list before you decide anything about the machine.
| Profile | Where it is specified |
|---|---|
| TR4 / TR5 trapezoidal | The section you will see on most industrial roofs in Europe and the Middle East. |
| IBR (inverted box rib) | A box-shaped rib, and the standard across large parts of Africa, the British Isles and Australia. |
| C20 / C35 / C44 narrow-rib | Specified in markets that build to a tighter rib pitch. |
| Wave-effect and stepped | Chosen where the market wants a metal roof to read as tiles instead. |
Machine specifications
| Material | PPGI, GI, colour-coated steel coil |
|---|---|
| Thickness | 0.3 – 0.8 mm |
| Yield strength | ≤ 550 MPa |
| Forming speed | 15 – 25 m/min |
| Forming stations | 18 – 24 |
| Drive | Gearbox / chain, 7.5 – 15 kW |
| Shaft diameter | Ø 70 – 95 mm, 45# steel, hard chrome |
| Roller material | GCr15 bearing steel, HRC 58–62 |
| Cutting | Hydraulic post-cut or flying cut |
| Control | PLC + 7″ touch-screen HMI, auto length + batch |
| Tooling change | 4 – 6 hours (servo-assist option: under 2 h) |
| Certification | CE Declaration of Conformity |
| Lead time | 45 – 60 days |
| Coil width | 914 / 1000 mm (trapezoidal) · 800 mm (762 mm corrugated) |
Coil width is listed per profile family rather than as a range, because the decoiler and the feeding width follow the coil you actually buy. The line is quoted against one of these configurations — there is no single list price.
How to choose a roof sheet machine manufacturer
Has the proposal sized the decoiler to the coil you actually buy?
Coil width is the quietest way two quotes for the "same" machine can differ. Trapezoidal sections take 914 mm or 1000 mm coil; if you run 762 mm corrugated instead, the strip is 800 mm wide. Feeding 1000 mm coil into a machine dimensioned for 914 mm leaves you trimming both edges and throwing the offcut away. A supplier who never asked what coil you buy has quoted a roll former, not a line.
How many cassettes are included, and what does a changeover really cost you?
One base frame with interchangeable roll cassettes is what turns a single machine into a multi-profile business — the common combinations are IBR plus corrugated, TR4 plus TR5, and C20 plus C35. A cassette change takes 4 – 6 hours by hand, or under 2 hours with the servo-assist option. If you quote many small orders across several profiles, that changeover time is the cost that matters, not the sticker price.
Are the rolls specified for the steel you actually buy?
The standard build is GCr15 bearing steel at HRC 58–62, which covers coil up to 550 MPa yield. If your market supplies G550 at 0.8 mm — common in some countries — the line needs hardened rolls at HRC 60–62 and more drive power. A supplier quoting one roll specification for every market has not asked what you buy, and the difference only shows up after the rolls are cut.
Is the leveling unit being treated as part of the coating quality?
Pre-painted coil at 0.3 – 0.8 mm marks and distorts easily, and the coating is the product — a badly set leveler scuffs the surface before the strip reaches the first station. Leveling is also where cross-bow is removed, and after the section is formed there is nowhere left to take it out. It is a specification point, not peripheral equipment.
Does the cut match your order pattern?
A flying cut keeps the line running and suits long production runs of one length. A post-cut is chosen where the sheet length changes constantly. Both are available on the same line, so the question is which one your order book looks like — and a supplier who recommends one without asking about your order pattern has recommended whatever was on the floor.
Will the control panel be built for the destination country?
380 V 50 Hz is the standard build, with 415 V 50 Hz, 440 V 60 Hz and 220 V 60 Hz available. Stating the destination country at order stage costs nothing; discovering the mismatch after the machine has shipped costs a control panel and a delay. It is a small question that tells you how much export experience the supplier has.
What has to be settled before the rolls are cut
- Which sections you will sell
- IBR, TR4/TR5, the C20/C35/C44 narrow-rib family, corrugated and wave-effect are all available; how many of them you take determines how many roll sets the frame carries.
- Coil width you buy
- 914 mm or 1000 mm where the profile is trapezoidal; a 762 mm corrugated section is fed from 800 mm strip instead.
- Steel grade behind the thickness
- The working band is 0.3 – 0.8 mm, but grade matters as much as gauge: 550 MPa is the ceiling for the standard rolls, and if your mill supplies something harder — G550 at 0.8 mm, say — the line needs rolls at HRC 60–62 and a bigger drive behind them.
- Panel voltage
- 380 V 50 Hz is the default build. Alternatives of 415 V 50 Hz, 440 V 60 Hz and 220 V 60 Hz exist because the destination decides, so name the country before the cabinet is made.
- How profiles get swapped
- Either by hand, which takes 4 – 6 hours, or with the servo-assist arrangement, which brings it in under 2.
- Where the sheets are cut
- A flying cut suits long runs of one length; a post-cut suits a shop whose lengths change from order to order.
These are the points buyers most often change, and each one is settled before the rolls are cut rather than adjusted afterwards. The profile set and the coil width in particular decide the cassettes and the decoiler, which are the two items that cannot be added cheaply later.
Line configuration and options
| Decoiler matched to the coil | Dimensioned for 914 mm or 1000 mm strip on trapezoidal work, or 800 mm where the product is 762 mm corrugated. |
|---|---|
| Leveling unit | Takes the cross-bow out of the strip ahead of the first station — after forming there is no way back to it. |
| Forming frame | A frame of 18–24 stations driven through a gearbox chain at 7.5–15 kW, at a line speed of 15–25 m/min. |
| Interchangeable roll cassettes | The sets that let one frame produce several sections. A swap costs 4–6 hours by hand, or under 2 with servo assist. |
| Hydraulic cut | Choose a flying cut when runs are long, or a post-cut when the sheet length moves with every order. |
| PLC with 7-inch HMI and batch counter | Sheet length and batch size are typed in rather than measured off a running line. |
| Runout table | Coil-fed roofing sheet is long and light, and the table is what keeps it from buckling as it clears the cut. |
This is the list to check line by line when you compare proposals. On a roof sheet line the two items most often missing from a low number are the spare roll cassette and a decoiler sized to the coil width you actually buy.
Roof sheet machine price — what drives it
- How many profiles the line has to make
- Each profile family — IBR, TR4/TR5, C20/C35/C44, corrugated, wave-effect — needs its own roll cassette on the common base frame, so the combination you sell is the first thing that moves the price.
- Stations and drive power
- 18–24 stations on a 7.5–15 kW gearbox chain drive. Station count follows the section, and it is the part of the price that decides whether the profile comes out repeatable.
- Roll and shaft specification
- GCr15 bearing steel at HRC 58–62 on Ø 70 – 95 mm shafts in 45# steel with hard chrome. Running steel above 550 MPa adds hardened rolls at HRC 60–62 and more drive power.
- Coil width and decoiler
- Coil width of 914 / 1000 mm for trapezoidal or 800 mm for 762 mm corrugated sizes the decoiler and the feeding width, so it is a line-level decision rather than an accessory.
- Cut type
- A flying cut and a post-cut are different units chosen against your order pattern — long runs of one length, or constantly changing lengths.
- Control and tooling change
- PLC with a 7-inch touch-screen HMI and batch counter, and the choice between manual tooling change at 4–6 hours or the servo-assist option at under 2 hours.
We quote the configuration rather than publish a number, because a line built for one trapezoidal profile and a line carrying four cassettes across two coil widths are not the same machine.
Factory, certification and lead time
ZTRFM builds cold roll forming lines for the roofing, cladding, framing, floor deck, cable containment and highway barrier markets, and every line is assembled, wired and run on our own shop floor before it is packed. The roof sheet line carries a CE Declaration of Conformity with full technical documentation, runs on 380 V 50 Hz as standard with other voltages to your destination, and lead time is 45 – 60 days. Machines ship FOB Tianjin and enquiries are answered within 24 hours.