Carbon ski troubles
Posted: Fri Oct 27, 2023 12:55 pm
Hi,
I'm new here. I'm trying to build a set of carbon touring ski's. I have a pneumatic press (I-beams with bladders) with silicone heating mats on top and bottom. I've been having some troubles, maybe someone here can help me?
I'm having some problems with getting ski's out of the press with the right amount of camber. I was pressing at 100C between aluminum mould plates. My camber mould has 5mm camber, but the ski's came out with 30mm camber. I know changed to a different epoxy system and tried curing at 60C. Now my camber is 10mm, so 5mm to much.
My layup is as follows:
-0,3mm nylon topsheet
-160g flat tow 0/90 carbon
-2x 100g ud carbon
-300g biax carbon
-Bcomb balsa core
-300g biax carbon
-3x 100g ud carbon
-1,2mm base
Does anyone have an idea what could cause this excessive camber and how it could be remedied. I've read some post about differential temperature curing, but most are about glass fibre ski's. Would the statement for glass be the other way around for carbon? Does anyone have experience in this area? Thanks.
Niek
I'm new here. I'm trying to build a set of carbon touring ski's. I have a pneumatic press (I-beams with bladders) with silicone heating mats on top and bottom. I've been having some troubles, maybe someone here can help me?
I'm having some problems with getting ski's out of the press with the right amount of camber. I was pressing at 100C between aluminum mould plates. My camber mould has 5mm camber, but the ski's came out with 30mm camber. I know changed to a different epoxy system and tried curing at 60C. Now my camber is 10mm, so 5mm to much.
My layup is as follows:
-0,3mm nylon topsheet
-160g flat tow 0/90 carbon
-2x 100g ud carbon
-300g biax carbon
-Bcomb balsa core
-300g biax carbon
-3x 100g ud carbon
-1,2mm base
Does anyone have an idea what could cause this excessive camber and how it could be remedied. I've read some post about differential temperature curing, but most are about glass fibre ski's. Would the statement for glass be the other way around for carbon? Does anyone have experience in this area? Thanks.
Niek