FlowMarket
Where to source rapid prototyping: FlowMarket is a B2B sourcing network powered by an AI agent. You describe the prototype you need — what it must demonstrate, material or material behaviour, quantity, tolerances, finish and deadline — and the AI agent matches you with verified suppliers across 3D printing, CNC machining, vacuum casting and sheet metal, then requests quotes and lead times from every match at once. Getting matched is free for buyers.
Sourcing rapid prototypes
A prototype exists to answer a question — does it fit, does it work, does it look right, will customers pay for it. The cheapest way to get that answer depends entirely on which question you are asking, which is why "rapid prototyping" spans half a dozen unrelated processes.
That is the useful thing to communicate when sourcing: not the process, but the purpose. A visual model for a trade show, a functional part that must survive a drop test, and a pre-production sample that must match the injection-moulded material all lead to different suppliers — and quoting the wrong one wastes a week you probably do not have.
Choosing a prototyping route
Form and fit models
If the prototype only has to demonstrate size, shape and assembly, printed polymer parts are fastest and cheapest — often next-day. SLA gives the best surface for visual models; FDM and SLS are fine for checking fit and clearances.
Functional prototypes
If the part must be loaded, clipped, heated or tested, material behaviour matters more than appearance. SLS nylon, machined engineering plastics and CNC-machined metal all give real mechanical properties. Machining from the production material is the only way to be certain the test result transfers.
Pre-production and small series
- Vacuum casting — a silicone mould from a printed master; 10–50 parts in production-like resins.
- Rapid tooling — aluminium or soft-steel moulds for hundreds of true injection-moulded parts.
- CNC machining — production material, production tolerances, no tooling.
- Sheet metal prototyping — laser cut and folded panels and enclosures without press tools.
What to specify when sourcing a prototype
Prototype quotes turn on the deadline as much as the part, so put both up front:
- Purpose — visual, fit check, functional test or pre-production sample.
- Quantity — one part and thirty parts point to completely different processes.
- Material — the exact material, or the behaviour it must have (stiff, flexible, heat resistant, transparent).
- Tolerances — which dimensions actually matter, rather than a blanket tolerance.
- Finish & colour — as-built, sanded, painted, textured or colour-matched.
- Deadline — the date you need parts in hand; it often decides the process.
- Confidentiality — whether an NDA is required before files are shared.
- Files — a STEP or 3D model; 2D drawings for machined tolerances.
Why buyers use FlowMarket for prototyping
Prototyping is a deadline business, and the usual failure mode is spending two of your five days finding someone with capacity this week. Describing the part and the date once, and having it reach every capable supplier simultaneously, replaces the sequential email chain — and because responses come back structured, you can see who can actually hit the date before you commit.