Can plastic injection moulding and tooling be manufactured in China?

Confidence 4/5 Established practice

Injection moulding is the default process for plastic parts at volume, and the moment a buyer commits to a mould it becomes the most expensive decision in the project. The tool is a one-off capital cost that only makes sense against a realistic total volume, so the honest question is never "can it be moulded" but "at how many units does moulding beat machining". In practice the answer is almost always yes for a lawful physical product, and the useful question is which process and at what volume. For this category: Generally 1,000 pieces for a simple single-cavity part, 3,000+ where the part is large or has multiple cavities, because the tool cost has to be spread. USD 1,500–5,000 for a small simple single-cavity mould; USD 5,000–20,000 for medium complexity with slides or multiple cavities; above USD 20,000 for large parts, hot runners or family tools. Steel grade, cavity count and finish drive it more than part size alone.

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What goes wrong with plastic injection moulding and tooling

  • Cutting a mould for a product with unproven demand. Validate the market with machined or printed units first.
  • Not naming the steel grade. A 718H or a P20 mould behaves very differently to a soft prototype tool at 100,000 shots.
  • Skipping the DFM review. A part designed without draft angles, uniform wall thickness or adequate radii will mould badly or not at all.
  • Assuming one cavity. Multi-cavity tools multiply output and cost together, and the right answer depends on annual volume, not on the first order.
  • Forgetting that the tool has a finite shot life and needs maintenance.

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