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Vacuum casting

Vacuum casting

Vacuum casting of parts in PUR takes place in silicon dies and is used for the functional testing of prototypes or low-volume series production.
Because the parts are cast under a vacuum, they are pore-free and therefore extremely strong.

When you want to perform functional testing of your prototype

In development projects, there is often a need to undertake functional testing of the final design early on, using materials that simulate the plastic of the final construction. By producing casting moulds from silicon, parts can be cast in polyurethane (PUR) with the required properties.

Small series production

Vacuum casting is advantageous where small series production of plastic parts is required. The time required to produce a die is normally very short. The die is usually cast in silicon from a 3D printer master. The method does not require much post-processing, and the parts are like ordinary thermoplastics in their properties, e.g. hard, soft, rigid, flexible, heat-resistant and transparent.

Post-processing? We take care of it.

Do you need post-processing before delivery? It might be to add print, fit thread inserts or assemble complete parts. We take care of it on our premises.

To bear in mind

  • Parts cast in PUR that simulate various thermoplastics, from rubber grades in Shore 30 to 95A to glass-reinforced rigid materials.
  • V0 fire-rated material is also available.
  • The parts can be dyed the required colour; specify e.g. NCS or RAL colours.
  • Glass fibre can be added for greater torsional stiffness.
  • Around 20 to 25 parts can be cast in each mould cavity. More mould cavities can be created for larger quantities.
  • There is no problem adding metal parts or electronics to the cast.
  • Allowance should be made for release angles.
  • If you want stronger threads, we can include thread inserts in the cast or fit them afterwards.

Customer case - Metronor

Metronor is a customer for whom we have produced many plastic caps over the years. Their advanced measuring instruments are used in everything from industrial solutions to military and medical orthopaedic applications.
Our possibilities for rapid small series production with high precision and finish via vacuum casting in PUR give our customers the advantage of getting their products to market quickly at low cost.

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