Automotive parts move in a closed loop: rack to line, line to rack, rack back to the supplier. The packaging inside that loop has to survive repeated handling, keep a painted or machined surface intact, and be replaceable without re-engineering the rack. Honeycomb board fits that role as a liner, a divider and a replaceable wear part.
Where a rack damages a part
The part rests on rails or dunnage, and the contact is a line. On a stamped panel or a painted cover, that line becomes a mark that fails inspection. A honeycomb liner over the rail turns the line into an area.
The second point is the rack wall. A part that can slide sideways will touch the wall, and a painted wall contact is the same defect in a different place. Dividers fix position so the part cannot reach the wall.
Specification at a glance
Rack liners are usually 10-20 mm; dividers 10-15 mm with a dense cell so the slot walls hold. Both are consumable and should be specified as such.
| Position | Thickness | Cell | Note |
|---|
| Rail liner | 10-15 mm | 4-6 mm | Turns line contact into area |
| Side wall liner | 10 mm | 6 mm | Stops part-to-wall contact |
| Divider between parts | 10-15 mm | 4 mm | Dense slot walls |
| Base pad | 20 mm | 4 mm | Takes the part weight |
| Long loop, multi-trip | 15-20 mm, coated | 4 mm | Survives several cycles |
Consumable by design, not by accident
A returnable rack that uses paper liners replaces them each cycle. That is fine if it is planned, because the liner is cheap relative to a paint repair, but it has to be in the packaging cost per part rather than treated as a surprise.
Where the loop is long and the liner has to last several cycles, a thicker board with a coated facing survives better, and the honest alternative is a plastic or foam insert, which we do not make.
Cleanliness and the specification clause
Automotive packaging specifications often include a cleanliness clause covering dust and fibre. Kraft board can shed fibre at a cut end, so where a clause applies, the cut edges should be sealed or the board coated. Ask for the clause in writing before the first order rather than discovering it at receiving inspection.
Printing the part number on the liner is common and useful, because a rack with three variants is a rack that will eventually be loaded wrong.
Questions buyers ask before ordering
Is honeycomb suitable for a returnable rack?
As a replaceable liner or divider, yes. For a permanent insert, plastic or foam lasts longer and we will say so.
Will the board shed fibre onto a part?
A cut kraft edge can. Where a cleanliness clause applies, specify a coated board or sealed edges.
Can liners be die-cut to the rack profile?
Yes, including slots and notches that locate on the rack rails.
How many cycles will a liner last?
It depends on the part weight and handling. We do not publish a cycle count; a trial on your rack is the only reliable answer.
Can the part number be printed?
Yes, on the facing, which reduces misloading on a rack that carries several variants.
Share the drawing or the four key numbers with mona@hengnicepacking.com and we will confirm feasibility before quoting.
