Sealing ToolingHeated seal plate and seal tool, matched to your tray flange — full-area, flange and knurled seals, dialled in on temperature, pressure and dwell.
Heat, pressure and time — held by the tool
In contact heat sealing a heated tool presses the lidding film onto the tray flange. Heat fuses the sealant layers, pressure and dwell time set the bond — and the tool holds all three constant, seal after seal.
A complete seal tool is two parts: a seal plate — the heated, temperature-controlled platen — and the seal tool itself, the profiled face that decides exactly where the film seals. Both are cut from your tray CAD so the seal lands precisely on the flange.
Anatomy of a seal tool
Four elements decide seal quality — and every one lives in the tool, which is why the tool matters more than any machine setting.
Three seal profiles, one tool programme
Which seal face you need depends on the pack — how strong, how hermetic, and whether it has to peel. Pick one to see where it fits.
Full-area seal
The seal face contacts the whole lid area, fusing the entire surface. It gives the strongest, most hermetic bond — the choice when the pack must not open by hand.
Rigid trays, hermetic and MAP packs where strength is everything.
Rules of thumb for seal tooling
Prove the seal, then harden it
We prove the seal geometry and parameters on a simple heated tool, then build the production seal tool from the same CAD — zoned heating, coatings and quick-change mounting for the line.
Tool, tray and lidding are matched
The seal window depends on the lidding film and the tray’s sealant layer. Tell us the pairing and we set the tool — and the forming tool for the tray follows the same programme.
Breathable sterile-barrier lids — peelable seals for medical devices.
Aluminium and multilayer lidding — push-through or peel for pharma.
Clear rigid or flexible PET lids to match PETG and APET trays.
See the tray materials in our packaging materials hub.
What we deliver
Thermoforming, cutting and combined tooling follow the same programme — a seal tool can be built to combine with them.
Send your tray drawing and lidding film — we return the seal type, tooling route and quote.
PDF, STEP or DXF — attach it in the form
Seal land, knurl, parameters and tolerances on one page — plus what we need to quote.
What happens next
From your first message to a quote in three steps — no account, no sales call required.
Tray drawing, lidding film and the seal you need. PDF, STEP or DXF — attach it to the request.
Seal type, land width and a starting seal recipe (temperature, pressure, dwell) for your film pairing.
A fixed price and lead time — prototype seal tool for trials, production tool from proven CAD.
Typical first response within two business days.
Built for your sealing station
Every seal tool is made to the machine it runs on — ours or a third-party tray sealer. Send the seal-station spec and we handle the fit.
Drop-in fit, tested on our own machines before dispatch.
Built to your seal-station size, heat plate and clamp spec.
Standardised base for fast changeover and repeatable registration.
Matched to your web width and index for maximum output.
Made for regulated production
Seal integrity is the sterile barrier — our tooling is built and documented for ISO 11607 packaging and validated seals.
Every tool ID-engraved and matched to your part REF and batch records.
Starting seal recipe and documentation to support your IQ / OQ / PQ.
Tooling for sterile-barrier packaging; seals verifiable by peel and integrity tests.
Sealing tooling FAQ
Full-area, flange or knurled — which seal do I need?+
Full-area seals the whole contact surface for maximum bond and hermetic packs; flange sealing seals only the defined perimeter for a clean line and controlled width; knurled uses a textured face to concentrate pressure — strong but peelable, which is why it suits pharma pill blisters and paper/Tyvek lids.
What are the seal parameters?+
Three: temperature, pressure and dwell time. They depend on the lidding film and the tray’s sealant layer — we supply a documented starting recipe with the tool, which you confirm and lock during validation.
Why is seal-face flatness so important?+
Pressure has to be even across the whole seal. If the face isn’t flat and parallel to the sealing bed, some of the flange gets too little pressure and leaves weak spots or channels — the classic cause of failed seal-integrity tests.
Can one tool make a peelable and a push-through seal?+
Peel vs. weld is mostly set by the film pairing and parameters, but the seal face helps: a knurled face and a defined seal land give a repeatable peel, while a smooth full-area face maximises weld strength. We match the face to the opening behaviour you need.
Do you make combined seal-and-cut tools?+
Yes — a seal tool can integrate a cutting edge to seal and trim in one stroke, and can be built to combine with forming and cutting into a single combined tool. It’s the same tooling programme.
Explore the tooling family
One programme, four tool types — each available on its own, and designed to build together into a single combined tool.
Cavity tools that form trays and blisters.
View page →Seal dies for tray and lidding-film seals.
You are hereCutting and punching tools for finished-pack contours.
View page →Form, seal and cut in one integrated tool.
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