By Charlie118118 - 5/23/2019 12:51:56 PM
Hi
Im currently making a large foam mould for uses as a nose cone for a small single seat racing car.
We have used Easy Composites Low Density polyurethane foam to fill in gaps between our MDF skeletal frame.
I would like to make sure that I have the process correct for creating the mould as I only have one shot at this.
For the Plug once sanded body filled and completely finished i'll paint on a layer of EG60 Epoxy tooling gelcoat and allow this to fully cure, then apply at least 6 layers of the Easy-Lease Chemical release agent, followed by at least 2 layers of mirror glaze mould release wax.
Then im using 4 layers of 100gsm CSM fibre glass to create the mould from which I can infuse upon.
Is this process correct or is there anywhere I should make alterations please let me know.
Thanks
Charlie
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By Hanaldo - 5/24/2019 12:55:50 AM
Better, but you need a minimum of 3 layers of 450g CSM with the tooling resin otherwise it won't cure properly. It needs to 'self-bake' during it's initial cure by reaching a temperature of 60C, and to do that it needs to be sufficiently thick.
3 layers absolute minimum, 4 layers is ideal for a small mould. Everything else is bang on.
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