Vacuum Casting Services

What is Vacuum Casting?

Vacuum Casting uses two-component polyurethanes (PU) and silicone moulds to produce high quality prototypes and end-use products effectively. 

This technique works by first producing a master model. The master model is typically created using Stereolithography (SLA) or Selective Laser Sintering (SLS) to achieve a high quality and smooth surface finish. Subsequently, a silicone mould is produced by casting silicone around the master model, then placed in a vacuum. The resin will harden while simultaneously removing all of the air bubbles from the material. Finally, this leaves you with a cavity of the perfect representation of the master model to make more copies from.

In comparison to injection moulding, the process offers a lower front end cost with a higher unit price, while the latter demands a higher front end cost, but a significantly lower unit price. On the other hand, the quality of parts produced by silicone moulding and injection-moulding is comparable.

As a result, the method is suitable for low volume manufacturing of 20 parts or less when injection moulding is not cost effective. 

Materials

We use polyurethanes that are similar to rubber (Shore hardness 35 to 90A), PP, ABS, and PC.