Packaging for automotive parts and assemblies
Automotive packaging carries weight, tolerates grease, feeds a line on time and survives a long export lane - often all at once. The constraint that decides the design is usually the rack or the line, not the part.
Weight is the first constraint
Once a pack exceeds what one person can lift, the design question shifts. Handling becomes mechanical, drop heights fall but crush and clamp forces rise, and the stack load on the bottom case becomes the dominant number. That pushes designs toward double-wall BC or triple-wall construction, and pushes the grading conversation firmly toward ECT - edge crush relates to stacking, and stacking is what is loading your bottom case.
Specify the load honestly. The static weight above is only the starting point: board loses strength as it takes on moisture, and it creeps under sustained load, so a rack that holds for a shift may not hold for a month in a humid plant.
Oil, grease and swarf
Machined parts arrive with oil on them, and oil migrates into fiber. That matters for two reasons: a saturated board loses strength in exactly the area that carries load, and the pack may no longer be cleanly recyclable. The answers are barrier at the interface - VCI or coated liners where corrosion protection is also needed - or a fitment design that keeps the wetted face off the structural wall. Decide which face is allowed to get dirty at design time.
Line-side is a packaging requirement
A pack that protects the part perfectly and then takes an operator forty seconds to open is a bad pack. Where cartons are presented at the line, the format has to support the takt: tear strips, hinged lids, front-open designs, kanban labelling on the face the operator actually sees. This is where returnable and one-way strategies diverge, and the decision is an operations decision with a packaging consequence rather than the reverse.
Batteries and dangerous goods
Lithium cells and battery packs are regulated freight. Transport requires compliance with the applicable dangerous-goods rules, including UN 38.3 testing for the cells themselves and the packing instructions that govern how they may be shipped, along with the correct marking and documentation. This is not an area for improvisation or for a supplier's rule of thumb: the specification follows the regulation, and the regulation depends on cell chemistry, watt-hour rating, state of charge and whether the battery ships alone, with equipment or in equipment. Tell us early if batteries are in scope.
Export lanes and the wood question
Where parts are crated for export, solid-wood packaging falls under ISPM-15 and must be treated and marked accordingly. Corrugated and other processed fiber materials are not subject to ISPM-15, which is a genuine practical advantage on international lanes - no heat treatment, no fumigation certificate, no stamp to chase. For heavy export loads, triple-wall construction and moisture-resistant liners are the usual route, with the design derated for a long, damp dwell rather than a short lab test.
The test profile
Match the profile to the lane: an ASTM D4169 distribution cycle for mixed freight, ASTM D642 for compression, and an ISTA profile where parts move parcel. Acceptance on the incoming side runs on ISO 2859 sampling with defect classes agreed in advance - which for automotive quality teams is usually the least contentious part of the whole conversation.
What we need from you
- Part weight and geometry, and how many per case.
- Stack height and dwell time - in the plant and in transit.
- Whether parts arrive oiled, and whether corrosion protection is needed.
- Line-side presentation requirements and any labelling standard your customer mandates.
- Whether batteries or other regulated goods are involved.