Somos responsáveis pela construção----- somos responsáveis pelo fabrico----- somos responsáveis pela formação
Casing panels, access doors and filter frames formed flat enough to seal — and a note up front on the one thing we do not supply: rectangular duct lines.
An air handling unit is a sealed box assembled from folded panels, and its performance is measured by how well that box holds air. Casing panels, access doors, blank-off plates and filter frames are typically 0.6 to 1.2 mm galvanised or stainless sheet, and their flatness and edge geometry determine the casing air leakage class far more than the gasket specification does.
The equipment set follows from that. A máquina de dobragem de borda flexível produces the dead edges, offsets and returns that give a panel its rigidity and its sealing face. A Prensa de punção de torre CNC produces filter fixing patterns, fan and coil access cut-outs, acoustic perforation for inner skins and stiffening ribs in one clamping. A dobrador de painéis handles deeper four-sided panels and access doors. What none of these produce is rectangular ductwork — duct lines with integral TDF flange forming are a separate machine category that STON CNC does not supply, and we say so before quoting rather than after.
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 →
AHU and purification equipment concentrate their sheet metal in flat panels whose edges have to seal against each other. Edge geometry, not panel size, is the manufacturing problem.
A casing panel that bows will not seal against its neighbour, and the leakage test fails whatever gasket is specified. Straightness of roughly 0.2 mm per metre and angle accuracy of roughly ±0.5° per metre across the panel are what make even gasket compression possible along the whole joint.
Casing panels commonly require a hemmed dead edge, an offset for the inner skin, or a return that closes onto the insulation. These are the three special processes a flexible edge folding machine performs directly, with a minimum folded height of 4 mm, and which a press brake produces only with multiple setups.
An attenuator inner skin can carry thousands of holes. A laser pierces each one, so cycle time scales with hole count and the acoustic panel becomes the constraint. A turret punch multi-hits and nibbles the pattern with standard tooling and adds rib forming in the same clamping.
Size the folding capacity against your largest casing panel and the punching capacity against your acoustic products. Those two parts set the machine list.
The duct row is the important one on this page. Everything else about AHU casing panels sits comfortably inside the forming window.
| Parâmetro | Máquina flexível de dobragem de bordas | Dobradeira de painéis | Notas |
|---|---|---|---|
| Typical casing gauge | 0.6–1.2 mm | 0.6–1.2 mm | Bem abaixo da capacidade |
| Galvanised / cold-rolled max | 0.5–2.0 mm | ≤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 pharmaceutical and food AHUs |
| Dimensão máxima de conformação | 1200 × 1200 a 2000 × 1500 mm | up to 2800 × 1500 mm | Por modelo |
| Altura mínima de dobra | 4 mm | 5 mm | Casing returns live here |
| Altura máxima de dobra | 100 mm | 170 / 300 / 400 mm | Panel depth check |
| Processos especiais | Arco, borda morta, deslocamento | Positive and negative, 0–180° | Double-skin edges use dead edge |
| Straightness | approx. 0.2 mm/m — decides casing leakage performance | — | |
| Rectangular duct with TDF flange | Not possible — separate machine category, not supplied | Different supplier | |
| Serviços públicos | Trifásico, 380 V, ar a 0,6 MPa | Configurado para a tensão de destino | |
Flat casing panels, access doors, filter frames and cleanroom panels in 0.6–1.2 mm with hemmed, offset or returned edges, plus acoustic perforation. This is the core of AHU and purification sheet metal.
Rectangular duct production lines with integral flange forming, spiral round duct machines, circular flange rolling, and extruded or roll-formed casing frame profiles. All separate machine categories that STON does not supply.
Structural base frames, heavy lifting brackets, damper shafts and thicker mounting plates. One press brake alongside the panel 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 unit, EN 1886 defines casing strength, air leakage, filter bypass leakage and thermal performance classes, and ISO 14644-1 applies to cleanroom classification. These test your assembled unit rather than the machine — what the equipment contributes is the panel flatness and edge consistency those classes depend on.
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.
Most AHU factories need the folding machine first. The choice between the three is decided by edge geometry and panel depth, not by panel size.
| Máquina flexível de dobragem de bordas | Máquina de dobrar painéis CNC | dobradeira CNC | |
|---|---|---|---|
| Dead edge and offset returns | Direct process | Limited | Multiple setups |
| Four-sided access doors | Good | Single clamping | 4 rotations |
| Maximum folded height | 100 mm | 170 / 300 / 400 mm | Tool dependent |
| Minimum folded height | 4 mm | 5 mm | Tool dependent |
| Maximum panel length | 2000 mm | 2800 mm | 4100 mm |
| Base frames and heavy brackets | No | No | Sim |
| Operadores | 1 ou 0 com carregamento automático | 1 ou 0 com carregamento automático | 1–2 |
| A STON fornece isso? | Sim | Sim | Sim |
If your business is primarily ductwork rather than unit casings, this page is not the right solution. Duct lines with integral flange forming come from specialist duct machinery suppliers, and we will tell you that on the first call rather than after an order.
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 | Folding machine and punch cell |
|---|---|---|
| Double-skin edge return | Multiple setups per panel | Single dead-edge operation |
| Casing panel straightness | Crowning and operator dependent | approx. 0.2 mm/m |
| Leakage test failures | Common at panel joints | Reduced by consistent edge geometry |
| Perfuração acústica | Laser, scales with hole count | Punch, largely independent of hole count |
| Stiffening ribs | Separate operation | Same clamping as the holes |
| Operators per large panel | 2 | 1, or unattended with loading |
| Changeover between unit sizes | Tool change and gauge reset | Program recall |
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.
Dead edge, arc and offset bending with a 4 mm minimum folded height — the processes that produce double-skin casing returns. Up to 25 concurrent servo axes, 42CrMo forged blank holder, fully enclosed rear fencing.
Ver máquina de dobrar →
Filter fixing patterns, fan and coil access cut-outs, acoustic perforation and stiffening ribs in one clamping. ±0.1 mm accuracy, turret speed to 40 rpm, brush and steel-ball composite table for galvanised sheet.
Ver a série SF →
Access doors and deeper four-sided panels beyond the folding machine's 100 mm height. Full-electric servo closed-loop control, rapid compensation adjustment, cast or welded frames to 2800 mm.
View press arm type →
Exchange-table fiber laser for casing blanks, coil access apertures and unit-specific specials. Burr-free edges on galvanised and stainless sheet, with the next sheet loading while the current one cuts.
Ver unidade de laser →
Acoustic perforation and access cut-outs on the same panel in one clamping, in roughly 40% less floor space than two machines, with no secondary alignment between the pattern and the aperture.
View SFL series →
Base frames, lifting brackets, damper components and thicker mounting plates outside the panel window. 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 an AHU casing line does not become a six-month subcontracting problem.
AHU projects run to building services programmes with fixed commissioning dates. A unit that fails a leakage test on site is remade, not adjusted, so panel consistency and support response belong in 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.
The edge detail decides the machine. Send a section through your double-skin casing edge plus an acoustic panel with its real perforation pattern, and we return a configuration within 24 hours.
Prefere falar primeiro?
WhatsApp: +86 18153226091
Correio eletrónico: [email protected]
Envie os seus requisitos através do nosso formulário de contacto seguro. A nossa equipa responderá no prazo de 24 horas.
Quer esteja a atualizar uma linha existente ou a iniciar um novo projeto, a STON personalizará uma solução CNC para a sua produção.
