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This image shows the blades of a pattern to produce a radiator fan blade for a vintage car, with the original wood pattern and the mould to produce them. The blade sections and thier mould were produced using a fast cast polyurethene casting resin for speed and accuracy.

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This image shows the blade sections assembled and the addition of a wood piece to build up the size of the center boss. Also shown is the added boss underneath the fan blades which was used to hold the finished casting in the lathe so the hub section could be machined.

 

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Here we see the 'oddside' used to produce the mould joint line. This avoids the foundry having to cut the sand back manually to the joint line and makes for a much cleaner casting.