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Irregular parts are the reason generic packaging fails. A gearbox casting with bosses on three faces, a machined manifold with a fragile sensor port, a welded assembly that must not shift more than a few millimetres - none of these sit still in a flat-bottomed box. Thermoformed trays solve the problem at the design stage: each cavity is drawn from the part's actual geometry, so the plastic, not a filler material, does the locating.
Cavity development starts with your data. A STEP file is ideal; a physical sample works just as well, since we digitise it and build the tray model around measured surfaces. We mark the datums that matter - sealing faces, bearing bores, finished threads - and keep the formed plastic clear of them while supporting everything else. Locating ribs and side walls are added only where the part history shows movement risk.
Material follows duty. ABS gives a stiff, economical tray for internal handling; HDPE adds washdown and chemical resistance for production environments; and conductive or dissipative compounds bring ESD protection for electronics work-in-process. Gauges typically run from 1.5 to 6 mm, tuned so the tray flexes under grip without letting a cavity wall deform.
Depth is where thermoforming beats injection for this job. A formed tray can carry deep, narrow pockets at tooling cost far below a moulded equivalent, which makes single-part-per-cavity layouts practical even for mid-volume programs. Deep cavities also let trays serve as process racks - parts go from casting deburr to machining to final inspection in the same dunnage, never touching each other or an operator's gloves.
Stacking and logistics details are engineered, not assumed. Trays nest when empty and stack under load when filled, with interlocks that keep a tall column from racking in transit. Edge features accept strapping or lid options, and footprint dimensions are matched to your pallet or returnable container program so a full tray column swaps into existing flows without repacking.
Quality checks cover the things that actually fail in service. First articles are verified for cavity location against part datums, wall thickness in the corners where thinning concentrates, and stack load behaviour. Batch trays are checked for flash and vacuum marks, and ESD materials are validated for surface resistance on a defined cycle, not just on the day the tool was cut.
Typical applications include gearbox and pump component trays, sensor and electronics kitting trays, medical instrument sets, machined-part racking, and after-market service kits. Program sizes run from a few hundred trays for a pilot line to recurring monthly orders feeding assembly plants in Europe and North America.
Lead times stay short because tooling does. A single-cavity prototype tool is typically cut and first articles formed within two to three weeks of drawing approval; multi-cavity production tools follow in the same rhythm. Changes after launch - a revised boss, an added sensor - are pattern edits, not new moulds.
If loose packing, line-side rework or transit damage keeps showing up around your irregular parts, a cavity-matched tray is usually the fastest fix. Send the STEP file or sample and we will propose a layout, material and per-tray price you can drop straight into your packaging BOM.
