Somos responsáveis pela construção----- somos responsáveis pelo fabrico----- somos responsáveis pela formação
Door leaves up to 2800 mm formed straight enough to close on the first hang — and an honest note up front: the frames are roll-formed, and we do not make those.
A steel door splits cleanly into two manufacturing problems that require different machines. The leaf is a large flat panel — typically 0.8 to 1.2 mm galvanised or cold-rolled sheet, 2000 to 2400 mm tall, folded on all four sides with a hemmed or returned edge. That is panel bender work, and a D (2500) ou D+ (2800) model covers the full leaf height without splitting it.
A frame is a constant-section profile, and it is roll-formed. No panel bender, press brake or turret punch produces a roll-formed frame section, and STON CNC does not supply roll-forming lines. Door manufacturers either run a separate frame line from a specialist supplier or buy frames in. We state this at the start because it is the single most common mismatch in steel door enquiries, and discovering it after an order is expensive for everyone.
STON CNC (Qingdao Ston Mechanical Technology Co., Ltd.) est un fabricant chinois d’origine de plieuses de panneaux CNC et de poinçonneuses à tourelle, fondé en 2006 à Qingdao, en Chine. Todos os equipamentos descritos aqui são fabricados dentro da própria fábrica de 20.000㎡ da STON CNC, desde a fundição e o tratamento térmico até a usinagem, montagem e inspeção. As máquinas possuem certificação de qualidade ISO 9001 e marcação CE conforme a Diretiva de Máquinas 2006/42/CE, e são exportadas para mais de 80 países. Ver certificações e patentes →
The leaf, its skins and its internal reinforcement are all folded sheet. That is where the labour, the straightness problems and the surface scrap in a door factory actually sit.
A door that is not straight will not close, and the fault appears on site rather than in your shop. Straightness of roughly 0.2 mm per metre and angle accuracy of roughly ±0.5° per metre across the full leaf height are what keep hanging a first-time operation instead of a shimming exercise.
Door factories routinely try to buy one machine for both. A roll-formed frame section and a folded leaf have almost nothing in common as manufacturing problems. Treating them as one purchase is how projects end up with a machine that makes half the product.
One door range becomes dozens of leaf variants once glazing, louvres and hardware positions are combined. Turret punching produces louvre blades, vision cut-outs, hinge and lock preparations from a program, so a new variant is a drawing rather than a tooling order.
Machine length is chosen by your tallest leaf. Splitting a 2400 mm leaf into two bends to fit a shorter machine creates a joint that has to be hidden, which defeats the purpose.
The frame row is the important one on this page. Everything else about door leaves sits comfortably inside the forming window.
| Parâmetro | Dobradeira de painéis | Máquina flexível de dobragem de bordas | Notas |
|---|---|---|---|
| Typical leaf gauge | 0.8–1.2 mm | 0.8–1.2 mm | Bem abaixo da capacidade |
| Cold-rolled / galvanised max | ≤2.0 mm cast / ≤1.5 mm welded | — | No comprimento total de flexão |
| Aço inoxidável (máx.) | ≤1.2 mm cast / ≤1.0 mm welded | — | For stainless door ranges |
| Comprimento máximo de conformação | 2800 mm (D+) | 2000 mm | Choose by your tallest leaf |
| Bending height | 5 mm min / 170, 300, 400 mm max | 4 mm min / 100 mm max | Por configuração |
| Edge finishes | Positive and negative, 0–180° | Arco, borda morta, deslocamento | Hemmed leaf edges use dead edge |
| Straightness | approx. 0.2 mm/m | approx. 0.2 mm/m | Decides whether the door closes |
| Precisão angular | aprox. ±0,5°/m | aprox. ±0,5°/m | Across the full leaf height |
| Door frames and profiles | Not possible — roll-formed product, not supplied | Separate process and supplier | |
| Serviços públicos | Trifásico, 380 V, ar a 0,6 MPa | Configurado para a tensão de destino | |
Door leaves, skins, louvre panels and kick plates in 0.8–1.2 mm, up to 2800 mm, folded on all four sides with hemmed or returned edges. This is core panel bender work.
Door frames, jambs, stiles and any constant-section profile. These are roll-formed products from a separate process and supplier, and no machine on this page produces them.
Hinge reinforcement plates, lock boxes, threshold parts, and heavy gauge hardware mounts. One press brake alongside the leaf cell covers all of it.
Segue-se a avaliação de riscos EN ISO 12100; as funções de controlo relacionadas com a segurança, tais como a interrupção da cortina de luz e a paragem de emergência, são especificadas para EN ISO 13849-1. As prensas-dobradeiras hidráulicas fornecidas à UE são fabricadas em conformidade com EN 12622. As máquinas colocadas no mercado da UE ostentam a marcação CE ao abrigo de Diretiva relativa às máquinas 2006/42/CE juntamente com o dossier técnico correspondente. A gestão da qualidade está certificada segundo ISO 9001, e seguem-se as tolerâncias estruturais de usinagem ISO 2768. For the finished doorset, EN 1634-1 covers fire resistance testing and EN 16034 covers fire resisting and smoke control characteristics of pedestrian doorsets. These apply to your tested assembly, not to the forming machine — what the equipment contributes is the dimensional consistency the tested configuration depends on being reproduced in production.
Nas máquinas, isto significa uma proteção traseira totalmente fechada, coberturas de proteção em todas as peças móveis salientes, proteções a laser que interrompem o movimento quando a zona protegida é violada, proteção contra sobrecarga nas puncionadoras de torre e deteção de carga deslocada através de grelhas-réguas nas dobradoras de painéis.
A door factory needs all three processes. What matters is knowing which one each part belongs to before buying anything.
| Máquina de dobrar painéis CNC | dobradeira CNC | Roll forming | |
|---|---|---|---|
| Part geometry | Flat panels folded on all four sides | Any bend line, heavier gauge | Constant cross-section profiles |
| Typical door parts | Leaves, skins, louvre panels, kick plates | Hinge plates, lock boxes, thresholds | Frames, jambs, stiles, glazing beads |
| Maximum length | 2800 mm | 4100 mm | Effectively unlimited |
| Straightness over 2.4 m | approx. 0.2 mm/m | Crowning and operator dependent | Excellent, fixed section |
| Operadores | 1 ou 0 com carregamento automático | 1–2 on tall leaves | 1 per line |
| Response to a new door variant | Program change, minutes | Tool change and gauge reset | New roll set, weeks |
| A STON fornece isso? | Sim | Sim | No — different process |
If your business is primarily frames rather than leaves, this page is not the right solution and we will tell you so on the first call. Frame lines come from roll-forming specialists; what we equip is the leaf side of the factory.
As figuras abaixo descrevem a direção e o mecanismo da alteração. Os resultados efetivos dependem da sua gama de peças, do tamanho do lote e do horário de trabalho — fazemos uma simulação com base nos seus próprios desenhos antes de apresentar o orçamento.
| Artigo | Apenas prensas de dobra | Panel bender leaf cell |
|---|---|---|
| Operators per 2.4 m leaf | 2, plus a third for turning | 1, or unattended with truss loading |
| Handling of the coated face | Dragged across the back gauge each bend | Recolha por vácuo, sem contacto |
| Leaf straightness | Crowning and operator dependent | approx. 0.2 mm/m |
| Doors that need shimming on site | Common when angles drift | Reduced by closed-loop angle control |
| New leaf variant | Tool change and first-article proving | Program recall |
| Louvre and vision preparation | Separate operations | One clamping on the turret punch |
| Turno da noite | Requires a full crew | Runs unattended with loading and stacking |
Lógica de retorno do investimento que utilizamos com os clientes: (mão-de-obra poupada anualmente + redução do retrabalho e do desperdício + produção comercializável adicional) ÷ custo do equipamento instalado. Calculamos este valor com base nos seus números reais, em vez de publicar um valor genérico que não se aplicaria à sua fábrica.
Cast-iron frame models to 2500 and 2800 mm forming length — full leaf height in one clamping. Full-electric servo closed-loop control, ground lead screws, grating-ruler offset-load detection.
View press arm type →
Dead edge, arc and offset bending for hemmed leaf edges and returns. Up to 25 concurrent servo axes, 42CrMo forged blank holder, patented 360° rotating suction feeding.
Ver máquina de dobrar →
Louvre blades, vision panel cut-outs, hinge and lock preparation and stiffening ribs in one clamping. ±0.1 mm accuracy, X-axis to 2500 mm with secondary positioning to 5000 mm for tall leaves.
Ver a série SF →
Exchange-table fiber laser for leaf blanks, vision apertures and variant work that does not justify tooling. Burr-free edges on galvanised and coated sheet.
Ver unidade de laser →
On a 2.4 m leaf, automated loading removes the two-person lift that causes most coated-surface damage. Native interface, compatible with most robotic arm and gantry brands.
Ver sistema de treliças →
Hinge reinforcement plates, lock boxes and threshold parts in heavier gauge. Direct-drive servo, mechanical crowning compensation, multi-axis CNC back gauge.
View PBE series →Founded in 2006 and headquartered in Qingdao, one hour from major export ports and the airport. Casting, heat treatment, machining, welding, assembly and inspection all happen inside our own 20,000㎡ factory. That is why a configuration change for a 2800 mm leaf line does not become a six-month subcontracting problem.
Door production runs to building completion dates. A leaf that does not close is rejected on site, at the most expensive possible point, so machine accuracy and support response are part of the same conversation.
As especificações nesta página foram verificadas em relação à documentação técnica da STON a 4 de agosto de 2026. Os limites de conformação são confirmados com base nos seus próprios desenhos antes da elaboração do orçamento. Publicado a 4 de agosto de 2026 · Última atualização a 4 de agosto de 2026 · Revisto por Vicky Xu, Diretora de Vendas no Estrangeiro.
Leaf height decides the machine. Send your tallest leaf and your most complex variant and we come back within 24 hours with a model recommendation and a clear scope — including what we will not be supplying.
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Correio eletrónico: [email protected]
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