Why are overmolding and two-shot parts made in Shenzhen, not Thailand?

Overmolding and two-shot parts are made in Shenzhen because the equipment they need is all there: the 2K presses, the tool room, the paint line and the CMM lab. A part moves from mold to paint to inspection without a handoff to another company. Thailand runs injection molding, warehousing and assembly only.

Where does each step of a multi-material part happen?

Step	Where	Why it matters
Mold design and cutting	Shenzhen tool room	The team that built the mold re-cuts it if the design changes
Overmolding and two-shot molding	Shenzhen, on dedicated 2K presses	Two-shot runs on a press built for it
Painting	Shenzhen paint line	Paint is checked on the same floor as the molding
Measuring	Shenzhen CMM lab	Parts are measured against the CAD model
Assembly	Shenzhen, and also Thailand for parts that need only assembly	Finished components arrive from the Shenzhen floor

Why does keeping it in one place help?

A bond, shrink or paint problem on a multi-material part usually shows up at the handoff between steps. When molding, painting and measuring are on one floor, the people involved can look at the part together. A part sent to a separate paint or assembly company does not get that look. See why multi-material parts fail for the problems the review checks for.

What does Thailand run?

Fudakin’s Bangkok factory runs injection molding, warehousing and storage, and assembly. It does not run overmolding, two-shot molding, CNC machining or painting. Those stay in Shenzhen. More on the split is on our Thailand manufacturing page.

What about the China plus one question?

If you want some production outside China, plain injection-molded and assembled parts can run in Thailand. Multi-material parts stay in Shenzhen. Where a finished product counts as made depends on the job, so your customs broker confirms origin. For the tariff side, see China vs Thailand US tariffs.

Where can I learn more?

Our multi-material molding page covers overmolding, two-shot and insert molding. The Shenzhen manufacturing page shows the rest of the floor.