Máquina de perfilagem de rolos para estufas

Resposta curta: A greenhouse profile roll forming machine turns galvanized steel coil into the frame sections of a greenhouse: gutters, glazing bars, crop rails, clip rails and arches. Most lines run 1.2 to 3.0 mm coil at 8 to 20 m/min, with 12 to 24 forming stations, inline punching and a cut-off that follows the strip.

Which sections hold a greenhouse together?

A greenhouse is not one profile repeated four hundred times. Four to eight sections lock together into a frame that carries glazing, wind, snow and the weight of a crop. Each section has its own coil width, its own steel thickness and its own set of bends, and one greenhouse profile roll forming machine has to cover all of them.

That is why buyers should read the profile drawing before the machine tonnage. The drawing below is a set we built for a grower: four sections, four coil widths, one line.

Read the coil widths first. The 78 x 40 gutter takes 156 mm strip. The 32 x 25 hat section that clips into the gutter mouth takes 124 mm. The wavy rail takes 117 mm, and the small clip rail only 62 mm. One decoiler has to cover 62 to 156 mm without a rebuild.

On any greenhouse profile roll forming machine the gutter decides the frame. It carries roof water and truss reaction at the same time, which is why the same drawing usually runs 2.0 to 2.5 mm rather than 1.5 mm. A thin gutter dents at the bracket hole long before the frame itself fails.

What runs on the line?

A greenhouse profile roll forming machine is short compared with a cable tray or racking line. Most installations measure 18 to 25 m from decoiler to run-out table, and they run one shift a day rather than three.

• Desbobinador: 3 to 5 t single arm, manual or hydraulic expansion, 508 mm coil ID.
• Nivelador: seven or nine rolls, removes coil set before the first pass.
• Servo feeder and press: 60 to 100 t, SKD 11 tooling, feeds to ±0.5 mm.
• Trem de conformação: 12 to 24 stands on a welded frame, chain and gearbox drive.
• Corte: hydraulic flying shear for thin sections, stop-and-cut for heavy gutters.
• Run-out table: 6 m or 12 m, with a stacker for high volume work.
• Comando: PLC and HMI, batch counter, fault log.

Stations are where the money sits on a greenhouse profile roll forming machine. Every extra stand adds a pair of shafts, four bearing blocks, a gear pair and a slice of motor load. It also removes one springback problem that operators would otherwise fight with shims.

Thin clip rails run fast on few stands of the same greenhouse profile roll forming machine. Structural gutters run slower on more stands, because the lip, the stiffening rib and the two return flanges each need their own pass.

Which specifications decide the price?

Two greenhouse profile roll forming machine lines can share a 15 kW motor and a 60 t press and still differ by 30 percent in price. Shaft diameter, frame rigidity, bearing class and the way the cut-off travels are the difference.

The tolerance rows are the ones buyers skip on a greenhouse profile roll forming machine. A 0.5 mm error on a 32 mm hat section is 1.5 percent of the section, enough to make a glazing bar tight on one side of the house and loose on the other.

Galvanized coil: the part buyers underestimate

Greenhouse interiors are wet. Condensation runs down the glazing every morning, and irrigation water carries fertilizer. Zinc is the only thing standing between the frame and red rust, so coating weight matters more than steel grade on a greenhouse profile roll forming machine.

Z275 gives 275 g/m² of zinc across both surfaces, roughly 20 µm per side. Z350 gives about 25 µm. In a ventilated greenhouse both last, but coastal sites and heavy fertigation move the spec to Z350 without much argument. The Associação Americana de Galvanizadores publica os valores de espessura de revestimento face à vida útil que sustentam essa escolha.

Cut edges and punched holes carry no coating at all. That is why bracket holes should be punched with a clean die and why the cut-off should not drag the strip. A torn edge rusts first, and it rusts inside the section where nobody looks until the gutter leaks. SteelConstruction.info aborda o mesmo modo de falha em estruturas de aço.

If the coil arrives with an unknown coating weight, read Como escolher bobina de aço para perfilagem antes de cortar os rolos. As passagens são construídas para uma espessura e um limite de elasticidade, não para o que houver em armazém.

One mill, more than one section

Most growers do not buy a greenhouse profile roll forming machine per section. They buy one line and a set of cassettes, then change over when the order book changes.

A cassette change is a roll pack swap, not a rebuild. Four sections on one greenhouse profile roll forming machine, changed in 2 to 3 hours each by two people, is normal. That is the difference between quoting a 400 m greenhouse in a week and turning it down.

The trade-off sits in the frame. A cassette mill is heavier and more expensive than a fixed mill built for one section. If you will only ever make one gutter, buy the fixed mill. If you sell frames to more than one grower, buy the máquina de conformação por rolos de troca rápida and keep the cassettes on a rack.

Rolling on site instead of shipping air

A 6 m gutter off a greenhouse profile roll forming machine is mostly air. Shipping it in a 40 ft container costs more than the steel inside it, and it arrives with dents at every handling point.

Portable units solve that for projects far from a factory. The greenhouse profile roll forming machine below travels on crawler tracks, carries its own decoiler and control cabinet, and rolls at the greenhouse pad. Sections come off the line and go straight onto the columns.

A portable greenhouse profile roll forming machine costs more than a fixed line and runs slower. For one greenhouse it is a luxury. For a 20 hectare project on another continent it is often the cheapest option on the table.

Como especificar sua máquina

Five answers close most of the specification for a greenhouse profile roll forming machine. Send them together and the quote stops being a guess:

1. The section drawing, with coil width and thickness. A photo of an existing gutter is second best.
2. The steel grade: Q235B, Q345B, S280GD or S350GD. Yield strength drives springback and roll design.
3. The coating: Z275 or Z350, and whether the profile is powder coated after forming.
4. The hole pattern: bracket holes, drainage slots, bolt holes. Inline punching beats drilling later.
5. How many sections you expect to run in five years. That single answer decides fixed or cassette.

A Believe Industry constrói linhas de máquinas de roll forming para perfis de estufas desde 2005, com mais de 80 engenheiros e técnicos e mais de 500 máquinas operando em mais de 50 países sob ISO 9001 e CE. Além das secções para estufas, produzimos Máquinas perfiladeiras de perfis personalizados for racking, door frames, solar and cable tray work, and the wider range is listed under perfis personalizados.

For growers who run gutters as a crop system rather than a roof part, the cultivation gutter system e a forma de rolo para calha suspensa hidropônica cover the same line in more detail. If the greenhouse sits on a farm that also forms cladding or purlins, start from agricultural roll forming machines and compare line layouts.

Frequently Asked Questions of greenhouse profile roll forming machine

Q: What steel thickness do greenhouse profiles use?
A: Gutter sections usually run 2.0 to 2.5 mm, glazing bars and crop rails 1.5 to 2.0 mm, and clip rails 1.2 to 1.5 mm. Arches go to 3.0 mm when the snow load is high.

Q: How fast does the machine run?
A: 8 to 20 m/min depending on the section. A clip rail runs at the top of that range, a 78 x 40 gutter at the bottom, so one 6 m gutter takes roughly 30 to 45 seconds.

Q: Can one greenhouse profile roll forming machine make several sections?
A: Yes, with cassettes. A roll pack swap takes 2 to 3 hours with two people, and the same line can then run a gutter, a hat section or a crop rail.

Q: Which zinc coating should I order?
A: Z275 is the default for inland greenhouses. Move to Z350 for coastal sites, heavy fertigation or a frame that will never be repainted.

Q: What tolerance can the line hold?
R: ±0,5 mm na secção, 1 mm por metro na retidão e ±2 mm no comprimento de corte. Mais apertado exige outro desenho de rolos, não outro operador.

P: Preciso de punção em linha?
A: For gutters, yes. Bracket holes, drainage slots and bolt holes punched on the line remove a second operation and keep hole spacing tied to the cut length.

Send a section drawing to nossa equipe de engenharia and we will size a greenhouse profile roll forming machine around it, with the station count, the coil width and a line layout instead of a catalogue page.

Última atualização: 2026-11-05
Histórico de alterações do artigo
2026-11-05: Rebuilt the page from 262 to 1,800 words, added the profile, station and specification tables, six FAQs and eight internal links.
Gatilhos para a próxima revisão
A new greenhouse section drawing is added to the range
Zinc coating or steel grade recommendations change
The cassette or portable line is replaced by a new model