Vacuum forming is a moulding technique used to make small batches of plastic parts that must have a perfect surface. To create the silicon moulds, stereolithography models or milled parts are used as the master form. Using a vacuum chamber, a variety of 2-component casting resins with a wide range of material properties can be cast, including hard-solid, soft-rubbery, transparent, crystal clear and RAL colours.

Copies are made using silicon moulds. They have the advantage that complex shapes with undercuts can be released easily and cast without air inclusions. The choice of PU casting material is made in accordance with the material specifications for subsequent series production. The geometry of the part and the PU resin used for casting affect the durability of the moulds. Usually up to 25 parts can be cast from one silicon mould.
Advantages of the vacuum forming process:
• Ideal for small batches
• Close-to-production quality
• High surface quality
• Parts consisting of several components, inserts such as screw sockets and other mechanical components are possible
• Elastomers, silicon parts
• Parts with high transparency (optical properties, UV resistance)
• Technical functions (snap-in hooks, integral hinges)