downunder wrote:
huh, this might produce epoxy wrinkles on every wrinkled bag spot, unfortunately (I think).
See, the vac bag wrinkles are not a problem at all, in fact, we need to use heaps of excess vac bag for the bridging (ie step down in a board, like rails, etc). BUT, for that you need to use ble+bre+peel ply and the board will end up perfect. A bag with no wrinkles is not a good vac baging technique, btw.
The epoxy wrinkels, casued by wrinkled vacuumbag, are removed when pulling of the peel ply.
Good news:
- I ended up with a rocker of 6.2 cm.
Bad News:
- It seems as if the glass fabric buckled locally in the regions around the inserts (hard to see on photo's). Probably because I first applied vacuum and then applied a pre-rocker of 13.0 cm putting the fiber yarns under compression
.
- I have some dry spots. (did not used bleeder+breather)
- The edges look a little bit messy at some spots.
I do my best finishing the board and get the best result as possible. Because there is no way that I am not gonna ride this board at least once
downunder wrote:
Than 'hot coat' the board with thinned epoxy using a PX ( xylene). Mix PX 10% with hardener only, not with a resin. I use a disposable foam brush.
Great tip on hot coating the top using PX. I also have a nylon topsheet laying around, but this might be a bit excessive for this build.
PS. I did not see any elegant way of using bleeder+breather for this build because I would have needed to add a huge amount of resin. A resin infusion approach would have been a possible solution.
PPS. A press would have been a good choise as well I think. However, I do not understand how air pockets in the layup would have had the chance to escape when using a press.