Launch delays often trace to unrealistic injection molding lead time China assumptions — especially when marketing commits SOP before tooling exists. Buyers who map mold build, sample loops, and freight avoid air-freight panic spend.
Typical timeline bands (indicative)
| Phase | Simple tool | Complex tool |
|---|---|---|
| DFM + quote | 3–7 days | 1–2 weeks |
| Mold build to T0 | 3–5 weeks | 6–10 weeks |
| T1 review + tweaks | 1–2 weeks | 2–4 weeks |
| Production ramp | 1–2 weeks | 2–3 weeks |
| Sea freight to EU/US | 4–6 weeks | 4–6 weeks |
Side actions, hot runners, tight cosmetics, and multi-cavity steel extend the mold band. Chinese New Year adds 2–3 weeks if PO lands wrong month.
What compresses lead time
- 80% frozen CAD with signed DFM before PO
- Single named PM and revision-controlled files
- Pre-approved material grade and color chip
- Parallel path: prototype mold while production steel designs
What blows lead time
- Weekly design changes after steel order
- Missing insert or hardware specs until T1
- Cosmetic approval without physical texture sample
- Lowest-price supplier with hidden subcontract
Plan bridge volume with low-volume contract molding if marketing date is fixed.
FAQ
Can T1 samples ship by air while mold finishes?
Yes — budget express freight separately from production sea schedule.
How do I hold supplier accountable to dates?
Milestone PO with tooling payment tied to T0/T1 acceptance — document in tooling agreement.
Next step: Share SOP date — get a lead-time plan with your RFQ.