What does a first production run need?

A first production run needs a finished mold. Order size is not what gates the start. The mold is. Once it exists and its samples are approved, the part can run in whatever quantity makes sense for your business.

Many buyers open with “what is your minimum order quantity?” For a new part, that is the wrong first question. Nothing can run until the tool is built. So the useful questions are what the tooling will cost and whether you can fund it. We cover the cost side in full on our Tooling & Minimums page, so we won’t repeat it here. In one line: you pay for the mold, and you own it.

This page is about everything else a first run needs, and in what order.

What you bring to the start

We need enough information to quote the tool and to judge whether the part can be made as drawn. Bring these:

• A drawing or a CAD file of the part.
• The material you want to use, or the job the part has to do so we can suggest one.
• Any tolerance or surface-finish requirements.
• Your expected yearly volume and your target timeline.

You don’t need everything on day one. But the more we have, the closer the first number will be to the final one. If your part uses more than one material, tell us that early. It changes the tool.

A design review before any steel is cut

Before we quote a mold, we review the design for manufacturing. This is the DFM review, and it is the cheapest place to fix a problem. A change on paper costs nothing. A change to cut steel costs weeks and money.

On every project, the review checks shrink and bond. Plastics shrink by different amounts as they cool, and two materials in one part have to hold together. For a single-material part, the review still looks at wall thickness, draft, gate position and anything that could trap or warp the part. You can read more about DFM engineering and about why multi-material parts fail.

Funding and building the mold

Once the design is settled, you get a tooling quote. When the mold is funded, the build starts. A typical production mold takes about 4 to 6 weeks from approved design to first samples. That covers machining the steel and running the first trial shots.

Tooling is paid 100% up front, when the mold is ordered.

Your part’s own numbers can shift the build. A tool for a large part, a tight tolerance or a multi-material part usually takes more care than a simple clip. We tell you where your part lands once we’ve seen the drawing.

Samples and approval

The first samples are not the product. They are the proof that the mold and the design work together. You check fit, look, feel and function against your drawing. If something is off, we adjust the tool or the process and run again.

Before parts ship, bonds and paint are checked by visual inspection and by our full-time QC staff. Every part is different, so we confirm your sample rounds at approval. Issues are fixed on the tool, and you sign off on the final approved sample.

Approval matters because it sets the standard. The approved sample becomes the reference that production is judged against.

Why do first samples fail, and how many rounds should I expect?

The most common reason a first sample fails is fit and dimensions: parts that do not fit together, or that are out of tolerance. In our experience, an overmolded or two-shot part typically goes through 2 to 3 sample rounds before the customer signs off. That is an estimate drawn from projects at our Shenzhen plant since 1996, and your own rounds are confirmed at approval.

Bonding and material problems are the other half of the picture. Our estimate is that more than 1 in 4 new projects arrive with a bonding or material problem already showing. Yet fewer than 1 in 4 need a design change after our DFM review. Both are true because most of these problems are fixed by changing the material or the process, not by redesigning the part. A change of material grade, a mechanical lock at the bond line or an adjusted process setting can solve what looked like a design problem.

So a failed first sample is usually a sign to adjust and run again, not to start over. The best way to cut the number of rounds is to send the critical dimensions and tolerances at the start. Our page on what to include in a quote request lists what to send. For the causes behind bonding failures, see why multi-material parts fail.

Then production starts

With the mold built and the sample approved, production can begin. The size of the first order is your call, based on your sales plan and cash, not on a rule about the tool. Once the mold exists, there is no set minimum. The part runs in whatever quantity makes sense, from a modest first order up. See Tooling & Minimums.

Two things help the first run go smoothly. First, decide the finish and packaging early, since paint, assembly and packing all follow molding. We run molding, painting and assembly under one roof, so those steps don’t get handed to a separate vendor. Second, keep the approved sample. It is your reference if a question ever comes up.

If your yearly volume is high, mention it at the start. For a part that combines two materials, we recommend two-shot molding over overmolding at roughly 10,000 parts a year and up. That choice changes the tool, so it is best made before the mold is designed. Our comparison of overmolding, two-shot and insert molding explains the trade.

The path from files to first run

Stage	What happens	What decides when it starts
Files and quote request	You send the drawing, material, tolerances and volume	You sending enough detail
Design review (DFM)	We check shrink, bond and buildability before any steel is cut	Design questions being settled
Tooling funded	You approve the tooling quote and fund the mold	Funding the mold
Mold build	Steel is machined and the tool is assembled	About 4 to 6 weeks from approved design to first samples
Samples and approval	First shots are checked and you approve the standard	Your sign-off on the samples
Production	Parts run in the quantity that suits your business	An approved sample and a finished mold

The mold sits in the middle of that table, and it is the stage most buyers underestimate. Order size appears nowhere in it. If you’re planning a launch date, count back from the mold, not from the order.

What to do next

Send us the part and we will tell you what the tool would cost and how long it would take. Get a quote and include your volume and timeline. We’ll review the design first, so the number you get reflects the real part.