Progress in polyurethane!

The biggest limitation I've faced with moulding polyurethane components has been bubbles of gas trapped in the finished components. This has meant quite a high reject rate, itself a big issue with a labour intensive process using expensive materials, while other products which couldn't be successfully moulded at all.

Once the polymers are mixed, they need to be placed under a high vacuum to extract gas from the mix, before it starts to cure. A recent upgrades to a larger vacuum pump has allowed me to cast parts which I had previously considered impossible.

The seat block moulds were made last year, but initial testing was unsuccessful and they were put aside. Looks like they're now a viable product......