Rapid Manufacturing

Low Volume Manufacturing through Vacuum Casting / RTV Moulding

Low volume Manufacturing implies production of functional components in small series, using Silicone Moulds, either for pre-production or for final manufacturing. Through Vacuum Casting process, a RTV (Room Temperature Vulcanisation) mould typically yields 20-25 outputs in common engineering plastic materials. The output is comparable to Injection Moulded components in physical properties and finish, but at a fraction of the cost and lead-time, typically within 1-2 weeks.

The process begins with a master model, typically a SLA prototype which is prepared and finished to ensure a high quality finish. After determining optimal moulding setup, molten Silicone is cast around this, partially under vacuum. After curing, the mould is cut along the parting planes and the master is removed from the newly formed mould cavity. The flexibility of the silicone allows limited undercuts, eliminating sliders and further parting planes.

The key advantages of the technology are


Functional plastic parts

Cost effective for low-volumes

Fast process, compared to conventional tooling

Allows limited undercuts and complicated geometries

Wide range of textures, materials and colours

Supports very small to large sizes