Vacuum casting rapid plastic parts

Vacuum casting
rapid plastic parts

Rapid models to replicate fine detail and textures

With our comprehensive vacuum casting facilities, we can provide you with high quality plastic parts in a very short time.

Vacuum casting is an extremely versatile process with many advantages to designers. From start to finish, our sophisticated product technology, workflow and highly skilled staff keep your project flowing smoothly to deliver exceptional moulded parts and assemblies in a wide range of materials, colours and finishes.

Our service includes a range of polyurethane resins to match injection moulding materials including:

  • ABS
  • Nylon
  • Polypropylene
  • Polyethylene
  • Glass filled Nylon
  • Transparent Polycarbonate and acrylic
  • Rubber and Elastomers.

The high quality prototype produced, allows engineers and designers to present their designs three dimensionally in short series runs for testing and assessment or low volume production.

The vacuum casting process

Vacuum casting components can be used in applications from automotive under-bonnet, high quality mouldings for trim and consumer products, through to high performance structural parts in vacuum cast glass filled nylon. All possible without the need for hard steel tooling.

The vacuum casting process involves encapsulating a master model in liquid silicon rubber; a vacuum is then applied to the mould. The mould is then cured in an oven at around 70ºC.

Once cured, the mould can be cut open, at which point the master mould is removed leaving a mould cavity perfectly replicating the master model. Master models are typically made from Stereolithgraphy models, which are painted and textured to give the desired finishes.

The quality of the master model dictates part quality, and complexity can be accommodated through multi-segmented moulds. The polyurethane resin materials are mixed and poured into the silicon mould under a vacuum to avoid voids and bubbles before being cured in an oven. For higher production rates, multiple parts can be moulded simultaneously in one silicon rubber mould.