Vacuum casting

Vacuum casting is a common technique to duplicate polymer parts by casting liquid polymer under vacuum into a tempered silicon tool. The necessary master forms for creating those silicon tools can be fabricated straight from 3D-CAD data by various rapid prototyping technologies like e.g. stereolithography.

A major advantage of the vacuum casting process is the fast and cost-effective fabrication of low and medium quantities with near-series material properties. Complicated shapes and geometries, undercuts, stiff/flexible components, transparent parts or the integration of standard parts can be realised without difficulty and with high reproduction accuracy.

Our services:

  • Consultation on material selection and the feasibility of your product or prototype
  • Creation or processing of 3D design data
  • Fabrication of necessary silicon tools by stereolithography
  • Manufacturing of your prototypes or small batch series using vacuum casting technologies

Form + Technik engineering GmbH typically uses polyurethane (PUR) cast resins and polyamide (PA) for the vacuum casting process.


Vacuum casting PUR

Due to low material prices and a comparatively high durability of the utilised silicon tools the vacuum casting of PUR resins is the most cost-efficient option for the fabrication of vacuum cast parts.


  • Evaluation models and fitting examples
  • Test series
  • Small batch series


Vacuum casting PA

This variation of the vacuum casting technique allows to realise very high, near-series component properties, which can be additionally improved by additives. The fabricated parts are gas- and waterproof, chemically resistant and offer a high abrasive and wear resistance.


  • Evaluation models and fitting examples
  • Test series
  • Small batch series
  • Crash test

Examples of application


Dipl.-Ing. Erich Herden

Form + Technik engineering GmbH
Chemnitzer Straße 83
09224 Chemnitz / OT Grüna

Tel.: +49 (0)371 262482-0
Fax: +49 (0)371 262482-19
Mobil: +49 (0)175 1415756


Data sheets

PUR cast resin

PA cast resin


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