Asymmetrical layup in Snowboards
Posted: Fri Nov 10, 2017 3:56 pm
It is pretty common to find asymmetrical glasfiber layups in Snowboards, e.g. Triax on top and Biax on bottom. If you just do it like that you normally end up with concave base in a heat cure. I wanted bounce some ideas and possible tricks with you guys to prevent that. Two possibilites came to my mind so far.
1. Make a convex mold so that the final Board cools down to a flat one.
Possible disadvantage is of course that your cattrack does not adapt to it and you end up with uneven Pressure. As most people and companies seem to use catracks this is probably not the way to go.
2. Lower the wheight of the +45/-45 fibers until their is no warp anymore(in a biax/triax Setting). But this also lowers the torsional effect of the triax weave which is the reason to use it in first place. And although i havnt carried out the computations i would suggest that the resulting torsional stiffness is not better than in the biax/biax setting.
Anymore suggestions or insights on this topic? How do the big guys do it?
Cheers,
Hannes
1. Make a convex mold so that the final Board cools down to a flat one.
Possible disadvantage is of course that your cattrack does not adapt to it and you end up with uneven Pressure. As most people and companies seem to use catracks this is probably not the way to go.
2. Lower the wheight of the +45/-45 fibers until their is no warp anymore(in a biax/triax Setting). But this also lowers the torsional effect of the triax weave which is the reason to use it in first place. And although i havnt carried out the computations i would suggest that the resulting torsional stiffness is not better than in the biax/biax setting.
Anymore suggestions or insights on this topic? How do the big guys do it?
Cheers,
Hannes