One-stop precision sheet metal manufacturing
One-stop OEM partner for structural parts: MetlTek runs precision sheet metal, mechanical assembly and complete unit delivery from a single plant in Kunshan, China. Founded in 2001, the factory runs three laser cutting machines (a Trumpf 3030 plus two Hongshan machines, the largest 6000 x 2540 mm), a 6.5 m CNC gantry machining center, a Salvagnini P2Lean bending center, Panasonic and Fronius welding robots and an 8 m rail-mounted welding cell. Finished goods ship to industrial customers across Europe and North America.
Three commitments we are judged on by every customer, on every order.
Round-the-clock response
Send drawings at any hour — an engineer replies within one working day, not an automated ticket.
Factory-direct pricing
No trading layer in between. You buy from the plant in Kunshan that actually cuts, bends and welds the parts.
Delivery you can plan around
Committed lead times, serialised inspection records and export packing that survives ocean freight.
| Material | Stainless steel 304, 316L, 1.4301 / 1.4404, brushed or 2B finish |
|---|---|
| Sheet thickness | 0.8 – 6.0 mm |
| Tolerance | ± 0.05 mm (laser cut, all machines), ± 0.25° (Salvagnini / TRUMPF bending), ± 0.3 – 0.5° (conventional brakes) |
| Surface finish | Brushed, polished, passivated, weld seams ground flush |
| Minimum order | 1 piece for prototypes, series from 20 pieces |
| Lead time | Sample 8–12 working days · series 4–6 weeks |
Structural sheet metal carries load, so "will it hold" is only half the question. The other half is deflection and load path: a part can pass a strength check and still sag past what the machine it supports will tolerate. Section, joint design and the decision about what gets machined after welding all follow from those two numbers, and where a part exceeds our envelope the split line has to be chosen so the splice carries load rather than interrupting it.
| One-piece cutting | Gantry laser to 6,500 × 4,700 mm, mild steel to T25 mm |
|---|---|
| Weld strength | Robot cells qualified to ≥ 90% of base metal strength |
| Machining | Vertical milling and surface grinding for mounting faces and true holes |
| Materials | Carbon steel, stainless 304 / 316, aluminium |
| Squareness | Checked on the diagonals after cooling, with a correction pass where required |
| Inspection | Dimensional record, plus a corrected squareness record on welded structures |
Four things that decide whether a metal enclosure project lands on time and on budget.
Tolerances we can hold
±0.1 mm on laser-cut features and ±0.3 mm on formed parts, verified before dispatch.
Quality you can audit
ISO 9001 processes, first-article inspection and a measurement report with every series batch.
One supplier, five processes
Cutting, bending, welding, coating and mechanical assembly under one roof — no hand-offs between vendors.
Built for export
Export-grade packing, customs documentation and container loading planned for Europe and North America.
Optical sorter cabinets, infeed frames and buffer hoppers for Tomra (Norway). Anti-stray light precision is achieved through bending tolerance, robot seam welding and matte black interior coating. Highlights: precision light sealing, 6.5 m gantry machining in one setup, matte black interior.
Deep-drawn fan scrolls, guide rings and impeller shrouds for Ziehl-Abegg (Germany). One-piece forming means fewer seams and smoother inner walls, so pressure loss and noise stay low. Highlights: one-piece deep drawing, robot circumferential sealing weld, accurate balance datum.
Vertical collector housings with conical dust hoppers and support frames for Camfil (Sweden). Fully welded gas-tight construction with machined sealing flanges. Highlights: gas-tight welding, anti-bridging hopper forming, machined flange faces, outdoor-grade coating.
Laser machine control cabinet and sealed top housing (sheet metal structure only) for Trumpf (Germany). Sealing is continuous across the top joint so the IP66 rating carries across the whole cabinet. Highlights: IP66 sealing, sealed top transition, oil-resistant industrial coating.
Split upper and lower equipment frames with a machined mounting plate between them for AP TECH (Korea). The 6.5 m gantry mills the mounting face in one setup and assembly gaps are held uniformly. Highlights: gantry-machined mounting face, granite plate fitting, assembly gap control, rigid vibration-damped frame.
Sectioned conveyor frames, support structures, side guarding and drive housings (sheet metal structure only) for Vanderlande (Netherlands). 8 m rail-mounted robot welding keeps long sections straight and interfaces interchangeable. Highlights: long-section robot welding, interchangeable section interfaces, outdoor salt-spray coating.
Deflection, not just strength
A part can be strong enough and still move too much. The allowable deflection, not the yield figure, is what selects the section and the bracing.
Joint design and weld access
A weld that cannot be reached to full size is a weak point whatever the drawing says. Joint geometry is planned around access, because a joint you cannot weld is a joint you do not have.
Machining after welding, not before
Welding moves metal. Where a face has to be flat or a hole has to be true it is machined after the weld has cooled, which is the only order that holds the tolerance.
Choosing the split line on an oversized part
Above the gantry envelope the part has to be split. Where the split lands decides whether the assembly behaves as one piece or as two bolted halves.
Quality is measured, not claimed. A precision inspection system compares 40 million measurement points against your CAD in 0.1 seconds per part, and every batch is documented under our ISO 9001 system. Reference customers include TOMRA, TRUMPF, RITTAL, ZIEHL-ABEGG, CAMFIL, VANDERLANDE, MAHLE and WEISS TECHNIK.
There is no fixed MOQ. Prototypes and small batches from one piece are accepted, and unit prices fall as volume grows. One-off tooling cost is quoted separately.
Yes. We regularly work under NDA and produce strictly to customer drawings. Files stay on an internal server and are never shared with third parties.
A first-article sample is typically ready in 7–10 working days, and series production runs in 3–5 weeks depending on quantity and surface finish.
Yes — the part is split and welded, and the split line is chosen so the splice detail carries load rather than sitting across the middle of it.
Where a face has to be flat or a hole true, yes. Welding moves metal, so critical faces are machined once the weld has cooled.
T25 mm in mild steel and T20 mm in stainless on the 5030 and gantry lasers, in one piece up to 6,500 × 4,700 mm.
Send your drawings and quantity — you will get a quotation with lead time, not a sales script.
Tell us what you need — our engineer replies within 1 working day.