Vacuum Casting

What is Vacuum Casting?

Vacuum casting (also called polyurethane casting) uses a 3D printed master to create a silicone mould. Resin is cast under vacuum to produce detailed, bubble-free parts that closely mimic final production plastic parts. Ideal for producing small to medium quantities of high-quality parts on-demand. Vacuum casting is ideal for parts that require overmoulding.

How does the vacuum casting process work?

• A 3D printed SLA master is finished and used to create a tool into which silicone is poured to create the mould.

• The mould is placed in a vacuum chamber to remove air.

• Polyurethane resin is poured and drawn into the mould under vacuum for a high-quality finish.

Key Benefits of Vacuum Casting

Smooth surface finish with minimal post-processing.
Fast project turnarounds.
Captures undercuts, fine textures, and detailed features with ease.
Fills the gap between prototyping and full-scale production.
Wide range of polyurethane materials (ABS-like, rubber-like, etc.)
Perfect for producing 10–100 units without the high cost of injection mold tooling.