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Wood mould making

http://www.talkcomposites.com/Topic34777.aspx

By kosak95 - 2/6/2020 8:54:43 AM

Hi all, 
I have a question about mould making for vacuum infusion.
I have model of a helmet I want to make and I would like to make mould of wood.
I would mill the wood and get the shape of mould like the helmet. 
Do you think this is good idea, if not, what is better solution?
If this is possible what kind of coating do you recommend on top of the wood so i get the best possible surface quality?

Thanks
By Buchado - 2/6/2020 11:31:01 AM

kosak95 - 2/6/2020 8:54:43 AM
Hi all, 
I have a question about mould making for vacuum infusion.
I have model of a helmet I want to make and I would like to make mould of wood.
I would mill the wood and get the shape of mould like the helmet. 
Do you think this is good idea, if not, what is better solution?
If this is possible what kind of coating do you recommend on top of the wood so i get the best possible surface quality?

Thanks

Hi kosak.
In general, wood isn't the best mould material for vaccum bag/infusion due to it begin porous, so you can get air leaks through the mold, to avoid that you'd have do seal the wood pretty nicely, probably with a wood specific product or somethin (don't know much about wood), so you would have to work on sealing it and on the surface finish, it doesn't seem a good option for me.
In my opinion, it would be a lot of work which would not pay off, since there would be a big chance of failure.

Try a gel coat or a mold making specific product, followed by some fiberglass and resin, I know there are some nice mold making supplies to sell on the easycomposites website.