Low volume injection molding contract programs — NPI builds, regional pilots, bridge production before high-cavity steel — need different tooling and pricing logic than million-piece SKUs. The wrong partner pushes full production mold economics on a 2,000-piece need.
When low-volume contract molding fits
- Design validation before capital tooling approval
- Market test with real molded material properties
- Bridge supply during transfer from prototype to production tool
- Legacy SKU with declining but still required output
- Spare parts program with intermittent demand
Tooling options by volume band
| Annual volume (indicative) | Common tooling approach |
|---|---|
| < 500 | 3D print / CNC / soft prototype mold |
| 500 – 5,000 | Aluminum or single-cavity prototype mold |
| 5,000 – 50,000 | Single-cavity steel or family mold |
| 50,000+ | Multi-cavity production steel |
Volumes are indicative — part size, material, and CTQs shift the breakpoint.
Bridge production pitfalls
- Process mismatch — bridge tool on different shrink than production steel
- Material change — “similar” resin invalidates validation
- No transfer plan — second qualification delay at cutover
Deuchi ties prototyping recommendations to planned production gate strategy when possible.
Pricing expectations
Low-volume contract runs carry higher piece price — setup amortization and manual handling. Compare TCO including tooling write-off if bridge mold is discarded vs reusable aluminum. Sometimes a modular production mold with insert change is cheaper over 18 months than two full tools.
Contract terms for short runs
- Minimum order quantity and setup fee
- Lead time for repeat releases
- Storage of mold between pulls
- Path to scale pricing when volume crosses threshold
FAQ
Is aluminum mold enough for production?
For some programs yes — limited shots and non-abrasive resins. Glass-filled or high-volume needs steel.
Can we move from low-volume partner to Deuchi for scale?
Yes — bring drawings, samples, and learnings; expect DFM and possibly new steel for cavitation.
How fast can T0 samples arrive?
Prototype mold timelines often 2–4 weeks depending on complexity — confirm in RFQ.
Next step: Share volume band and timeline for a contract manufacturing plan.