Why this matters
Compare family molds, multi-cavity single-part molds and single-cavity tools on cost, balance risk, maintenance and how each fits different production volumes. The tooling strategy question is rarely just "how many cavities" — a family mold, a multi-cavity single-part mold and a single-cavity tool solve different production and risk problems, and picking the wrong one either overspends on tooling or under-delivers on volume.
Buyer checks
Quote variables
| Quote variable | Why it changes the mold route |
|---|---|
| Part compatibility | Family-mold parts should be similar in wall thickness and material behavior, or fill balance and cycle time both suffer. |
| Cavity balance | Uneven filling across cavities shows up as dimensional or cosmetic variation between “identical” parts. |
| Downtime exposure | A single-cavity fault on a family or multi-cavity tool can stop production of every part it makes, not just the one at fault. |
| Volume fit | More cavities lower per-part cost only if the order volume can actually use the extra output; otherwise it just raises upfront tooling cost. |
Common mistakes
How to apply it
Share your real annual volume range and whether parts genuinely share material and wall thickness before agreeing to a family, multi-cavity or single-cavity tooling strategy. If the project is early, the guide can show whether the next move is CAD cleanup, DFM review, prototype tooling, production mold planning, export mold handoff or repair review.