PU or polyurethane casting
PU resin casting is a prototyping technology used when you need a small series or short run of your 3d cad model made out of a PolyUrethane with properties close to real injected plastics such as ABS, POM ,PA or TPE's. Usually series of 5-100 pieces will be run.
The process:
The first step of PU Casting process involves encapsulating/enclosing a master model in a liquid Silicone rubber. Than a vacuum is applied to the mould. The mould is then cured in an oven at around 70°C
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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.
what is possible with vacuum casting?;
We can make double or triple shot products, we can cast rubber or TPE or TPR like materials. (with 20-80 shore A hardness)
We can vacuum cast optical clear plastics ( same like PMMA)
WHAT ARE THE main ADVANTAGES OF PolyUrethane casting?
The main advantages of this process are lower tooling costs then tradional injection molds manufacturing by injectionmoldschina.com and a quicker turn-around than traditional mould making (e.g. moldings within days of receipt of masters) The products have an exceptional detail and accuracy.
Minimal shrinkage permits use of duplicates or sub-masters for multiple impressions, useful if originals are delicate. Flexible moulds and inserts allow significant undercuts, simplifying mould-making and containing costs.
We offer low volume production by Polyurethane casting or vacuum casting (RTV)
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