SERVICES
Family Molding Service
One mold, one cycle, the whole product set. Family molding and multi-cavity tooling cut tooling spend and per-part cost by molding several part numbers — or several cavities of one part — in a single shot. We take the mold from design to production on our automated injection presses, with mold-flow-verified balance and ±0.01 mm tolerance, from pilot runs to full production.
THE REAL DECISION
Small-Batch Sourcing, Done Right vs. Done Wrong
Low-volume buyers usually hit one of two paths. The wrong one costs months and doubles the budget; the right one gets real production parts in your hand in weeks. Here is what separates them.
The wrong path: an unbalanced mold that rejects itself
Cavity imbalance is the #1 failure mode in multi-cavity and family molds. One cavity fills faster and flashes while a slower cavity short-shots — every cycle yields rejects, per-cavity dimensions drift apart, and the whole batch gets quarantined. The losses grow with every cavity you add, quietly doubling your real per-part cost.
The wrong path: the wrong cavity count for your volume
Over-cavitating a low-volume part ties up machine hours and tooling spend that never pays back; under-cavitating a high-volume part caps output and keeps per-part price high. Cavity count is an economic decision — one mold per part number, several cavities of the same part, or one family mold for the whole set — and choosing wrong shows up in every quote after the first.
WHAT WE OFFER
The Route That Fits Your Order
What Is a Family Mold?
A family mold (or multi-part mold) combines cavities for different part numbers in one tool, sharing one injection cycle and one resin.
One mold, several parts
Cavities for two or more different parts — a cap, a collar and a gasket, for example — are built into a single mold base and filled in one cycle. The cavities are cut into a shared cavity plate or separate inserts, so the whole product family runs on one press with one set of utilities.
- Same resin family
- One cycle per set
- One machine per program
- Shared cooling & utilities
How the cavities share the cycle
Runners and gates are sized so every cavity fills at the same pressure and speed; fill balance is verified on the first trial.
- Balanced runner layout
- Matched fill times
- Cavity-by-cavity trial data
When it pays off
Matched sets sold together, low-volume families that cannot justify one tool per part number, and pilot runs that need a full set of parts fast.
- Matched product sets
- Low-volume families
- One NRE instead of N
When it does not
Parts with different resins, very different volumes, or different cooling needs belong in separate tools — a family mold forces one material and one process window.
- Resin conflicts
- Volume mismatch
- Cycle conflict
Multi-Cavity (Thermoplastic) Injection Molding Capabilities
Process options selected to match your part geometry, material and annual volume.
On-site Multi-Cavity process engineering — material selection reviewed against your mechanical and thermal requirements.
Tight-tolerance multi-cavity molding with automated cells for repeatable quality run after run.
Custom tooling & rapid DFM feedback — shorten lead time from design to first article.
One-stop production: molding, secondary operations and inspection under one quality system.
Family Mold vs Single-Cavity vs Dedicated Multi-Cavity
Applications That Suit Family Molding
Consumer products
Cap + collar + gasket bottle sets and cosmetic-closure families molded in one shot.
Electronics
Housing + button + lens-frame sets for remotes, controllers and small appliances.
Automotive
Interior clips, fasteners and grommet families under IATF 16949 control.
Medical
Kit components — syringe cap, plunger and seal — molded from the same resin family under IATF 16949-level process control.
Industrial
Gear + spacer + bushing sets for gearboxes and mechanisms.
Logistics
One cycle produces one matched set — no sorting or kit-assembly step downstream, fewer SKUs to manage.
Family Mold Economics at a Glance
The real comparison at production volumes — one tool vs N tools, one cycle vs N cycles, with per-cavity traceability on every run.
| Factor | Single-cavity per part | Family mold per set |
|---|---|---|
| Tooling NRE | N separate tools | 1 tool |
| First-article lead time | Sum of N tooling cycles | One tooling cycle — 7–12 days typical |
| Cycles per set | N cycles | 1 cycle |
| Volume ceiling | No limit | ≈100k sets per year per part before dedicated tools win |
| Part-level cost at 1M+ | Lowest | Runner share and imbalance add cost |
| Per-cavity traceability | By part number only | By cavity ID — every cavity measured and logged |
FAQ
Family Molding Service — FAQ
Can you help with product development?
Yes. From design review and material selection to prototyping, tooling and mass production — our engineers support you through the entire product lifecycle.
Do you ship internationally?
Yes. We ship worldwide via air and sea freight, with export packing, documentation and delivery tracking handled by our team.
What quality inspections do you perform?
First article inspection, dimensional measurement, material verification and surface checks — with inspection reports provided per batch. Full details are agreed before production.
What is the difference between rapid and production tooling?
Rapid tooling uses softer materials and simplified construction for fast, low-cost validation runs (hundreds to low thousands of parts). Production tooling uses hardened steel for high-volume, long-life programs.
How long does injection mold making take?
Rapid tooling prototypes can be ready in days; production tooling typically takes several weeks depending on complexity, cavity count and steel grade. We confirm a detailed schedule with your quotation.
Do you provide DFM feedback?
Yes. Every quotation includes a design-for-manufacturing review: draft angles, wall thickness, gate and weld-line locations, tolerance recommendations and cost-saving suggestions — before any tooling is cut.
What file formats do you accept?
We accept STEP, IGES, STL, X_T and 2D drawings (PDF or DWG). A 3D model lets us quote most accurately; 2D drawings are used to confirm critical tolerances and specifications.
How do I get a quote?
Upload your 3D file (STEP, IGES, STL or X_T) through the quote page, or email it directly. Our engineers review the design, run a DFM check and send you a detailed quotation — usually within one business day.
Ready to Start Your Family Molding Service?
Factory-direct pricing, ISO-certified quality and rapid lead times. Send your spec and volume, get a quote within 24 hours — DFM review included.