How to Spot Shipping Damage on Custom Silicone Mold Deliveries

A 12-cavity gummy tray arrives with a 2 mm crease across the center web - every pour from that row sticks until you scrap the mold or fight flash for 200 cycles. RUUIPON ships custom silicone molds at MOQ 50 with prototypes in 3-7 days. This guide shows what shipping damage looks like on platinum silicone so you inspect before production use, not after scrap piles up.

Quick answer: Inspect within 48 hours of delivery - photograph outer carton, inner nest, and each tray under flat light. Reject trays with permanent cavity crush >0.5 mm, web tears, or Shore A shift from sample. Good export packing uses nested trays, corner protectors, and no point-load stacking above 3 kg per carton layer.

Shipping Damage Signs in One Table

Damage type	Visual sign	Production impact
Cavity crush	Dimple or flat spot in cavity floor	Uneven cast thickness; resin pools
Web tear	White stress line between cavities	Leak path; tear propagates on demold
Edge crease	Permanent fold on tray flange	Warp; poor registration on depositor
Corner nick	Missing silicone at outer radius	Flash at split; handling snag
Surface scuff	Matte patch on glossy cavity	Cast finish change - cosmetic only
Hardness shift	Shore A ±5 vs sample	Demold behavior change - rare in transit

Damage Types You See on Mold Deliveries

Silicone is flexible - that helps demold but hides crush until you pour. Damage categories:

• Compression damage - weight stacked on thin webs; common when cartons nest poorly. Tray nesting.
• Impact damage - corner drop deforms registration keys. Registration keys.
• Fold damage - tray bent past elastic limit; crease stays white.
• Heat damage - rare; silicone stable to 200°C short exposure. Heat limits.
• Contamination - oil or tape residue on food molds. Food-grade standards.

Compare to how we pack for export: export packing guide.

Unboxing Inspection Checklist

Step	Action	Pass criteria
1	Photo outer carton - all six faces	No crush >10 mm depth on corners
2	Count trays vs packing list	Qty matches PO - MOQ 50 or agreed count
3	Lay tray on flat granite/marble	All four corners touch; no rock >0.3 mm
4	Backlight each cavity	No crush dimple; uniform wall 2.5-5 mm
5	Flex test - gentle peel simulation	No white stress at webs; no tear start
6	Compare to approved sample	Shore A, color, cavity dimensions ±0.2 mm
7	Test pour 1 cavity (optional)	Clean release matches sample demold

Cavity Crush & Web Tear Assessment

Crush depth measurement separates cosmetic scuff from production reject.

Crush depth	Verdict	Action
<0.2 mm	Accept	Cosmetic; no cast impact on food/resin
0.2-0.5 mm	Conditional	OK for wax/soap; reject for chocolate logos
0.5-1.0 mm	Reject	Document + replacement request
>1.0 mm or web tear	Reject full tray	Do not run production - tear propagates

Thin walls crush first - spec 2.5-5 mm on quote. Wall thickness. Layout density matters: cavity spacing 8-20 mm.

Warp & Crease Recovery Tests

Some transit warp recovers in 24-48 hours at room temperature; permanent crease does not.

1. Rest flat 24 h - store tray flat, not rolled; check rock again.
2. Warm recovery (food molds only) - 40°C oven 30 min, cool flat; do not exceed food-grade limits.
3. Crease white line - if visible after rest, silicone fibers broke - reject.
4. Registration check - mate keys on two-part molds; gap >0.3 mm = reject.

Storage after receipt: warping prevention.

Documenting Claims Before MOQ 50 Production

Document	Why supplier needs it
Carton photos (6 faces)	Proves carrier vs factory packing fault
Tray serial / PO line	Trace vacuum-degassed batch
Caliper crush depth	Objective reject threshold
Sample side-by-side photo	Proves deviation from approved prototype
Test pour result (if run)	Shows demold failure linked to damage

Email claim package to [email protected] within 5 business days of delivery. Import context: importing from China. Sample approval baseline: sample checklist.

Frequently Asked Questions

Should I inspect every tray in a MOQ 50 shipment?
Yes - spot-check 100% for flatness and crush; full cavity inspect on 10% random sample minimum.

Can crushed cavities be repaired?
No reliable field repair - silicone patch delaminates on demold. Replace the tray.

Does vacuum degassing prevent shipping crush?
Degassing improves internal quality - it does not add crush resistance. Packing design does.

Who pays if carrier crushed the carton?
Document at receipt; we support replacement PO for factory-attributable packing failures.

Will a warped tray flatten under depositor clamp?
Light warp may; permanent crease transfers to cast - reject before line setup.

Prototype sample vs bulk - same packing?
Sample ships in rigid mailer; bulk MOQ 50 uses nested cartons - inspect both on arrival.

Lead time on replacement trays?
Typically 2-3 weeks production after claim approval - prototype path is 3-7 days for revised geometry only.