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Mould Making for Vacuum Casting

Prototype parts for fitment and functional testing of appliances, vehicles, electronics and other plastic parts
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Vacuum Casting is the process of production of plastic resin parts under vacuum using silicone moulds. It is usually used in the pre-production phase for testing or when production volumes are low. It is critical that the prototype be as close as possible to the final product. This requires the right materials to accurately replicate the engineering design. Some of the advantages of Fortisil materials for this application are:

  • Rubbers having good resistance to resins
    Resins undergo strong chemical reactions, releasing high heat when mixed and poured inside the silicone mould, which leaves the surface dry and etched after a few castings. Our rubbers have added fillers thus resulting in a much larger number of castings from the silicone rubber mould.

  • High Transparency
    In order to ensure that the casting material has reached all crevices of the complex mould geometry, one must be able to see through the rubber. High transparency grades leave no doubt.

  • High tear strength
    Demoulding complex parts might involve stretching and twisting the rubber mould but excellent tear strength ensures there is no deformation in it.

  • Supporting products
    We provide additives such as Delayer for a longer working time as well as castable PU Resins for better compatibility with our Silicones.

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