CNC Turning Aluminum vacuum Casting Impeller Pump Parts

What’s the advantages for vacuum casting?

The main advantages of this process are a much lower tooling costs and a quicker turn-around than traditional steel mould making. The lead-time to create casted models is around 7-10 days. The products have an exceptional detail and accuracy which comes close to the final injected plastic parts. Flexible silicone moulds allow significant undercuts, simplifying mould-making and containing costs.

THE PROCESS

The first step of vacuum casting-injection process involves encapsulating/enclosing a master model in a liquid Silicone rubber. This model is usually made by 3d printing, SLA stereo lithography or CNC machining. Then a vacuum is applied to the mould. The mould is then cured in an oven at around 70°C. Once cured the mould can be split up in 2 or more parts, at which point the master model is removed leaving a mould cavity perfectly replicating the master model.

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