Lost Foam Casting — Complex Hollow Parts Without a Parting Line

Lost foam casting uses a foam pattern that vaporises as the metal is poured, so there is no parting line and no core to assemble. It unlocks complex internal cavities and near-net shapes that are difficult or impossible with other casting methods.

Why Choose Lost Foam Casting

Because the pattern is made of expanded foam that disappears during pouring, lost foam casting removes the constraints of a two-part mould. That means no draft, no cores, no parting line flash — and the freedom to design internal passages and complex geometry directly into the part.

Parameter	Typical capability
Materials	Grey iron, ductile iron, carbon steel, aluminium
Part weight	0.5 kg – 200 kg
Dimensional tolerance	CT8 – CT9
Key advantage	Complex internal cavities, no cores, no draft
Tooling	Foam mould tooling, lower cost than die casting

Applications That Suit It

Manifolds and housings with internal channels
Pump and valve bodies with complex passages
Counterweights with integrated features
Parts currently made by welding multiple pieces together

Inspection & Documents

Spectrometry material certificate
X-ray / ultrasonic / magnetic particle on request
Dimensional inspection against drawing

Lead Time & MOQ

Tooling: 15–25 天
Sample: 20–30 天
Production: 25–40 天
MOQ: 50 pcs

FAQ

When should I use lost foam instead of sand casting?

When the part has complex internal cavities or would need multiple cores in sand casting. Lost foam eliminates cores entirely, which often lowers cost and improves consistency on such parts.

Can you machine the lost foam casting?

Yes — machining, heat treatment and finishing are done in-house, delivering a cast-to-print part.

What materials can you cast?

Grey iron, ductile iron, carbon steel and aluminium. We confirm the best material for your application against the drawing.

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