Organic form sofa in CF


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jawaswag
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Hi all!

I am intending to create an organic form sofa in CF. It's somewhat similar to the picture I've included below but a much smaller 2-seater version. My limitations are that I do not have space for a curing oven. Here are my concerns:

1) If I cannot cure an item in an oven, it means I will have to use room temperature cure resins and the means a hand layup method?

2) What can I make the mould out of? Is it a frame of wood with PU foam block for the the shape? If I do, how do I vacuum bag such a large mould?

3) Since the mould is likely to be a 'pool'-shaped form, can place a sheet over it and fill it up with water as a replacement over vacuum bagging? Would the high specific heat capacity of water affect the curing of the resin as it pulls heat away?


.

Cheers and thanks in advance,
Kai
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oekmont
oekmont
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Room temperature cure doesn't mean wet layup. You could infuse the part as well. Using water isn't a good idea, as the water adds huge loads onto your mould, wich will likely deform it. A full vacuum bag, if done right, will not deform your mould.
For such large pieces with large tolerances for the final shape, I would use styrofoam , than cover it with an glass cloth and epoxy and than smooth everything up with body filler.

Steve Broad
Steve Broad
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oekmont - 10/1/2018 7:14:07 AM
Room temperature cure doesn't mean wet layup. You could infuse the part as well. Using water isn't a good idea, as the water adds huge loads onto your mould, wich will likely deform it. A full vacuum bag, if done right, will not deform your mould.
For such large pieces with large tolerances for the final shape, I would use styrofoam , than cover it with an glass cloth and epoxy and than smooth everything up with body filler.

I have always assumed that wet layup also covered standard vacuum bagging and infusion as well as basic layup without vacuum, as they both are wet processes :-) 

The water idea was always a non starter IMO due to the pressures involved, but an interesting one nonetheless. However, I can't see how 10m of water adds any more load to the mould than a 14.7psi vacuum.

GO

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jawaswag - 7 Years Ago
Steve Broad - 7 Years Ago
oekmont - 7 Years Ago
Steve Broad - 7 Years Ago
jawaswag - 7 Years Ago
             This needed a large bag.
Steve Broad - 7 Years Ago
oekmont - 7 Years Ago
oekmont - 7 Years Ago
Steve Broad - 7 Years Ago
oekmont - 7 Years Ago
oekmont - 7 Years Ago
Steve Broad - 7 Years Ago

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