Just wondering if anyone wants to sell some polyurethane foam scraps. They could be pieces cut off to make a board, perhaps where the board was considerably thinner than the original blank and they were sawed or hotwired off. I may have to simply buy a block of foam and hotwire my own - if I can't find anyone who already has them hotwired or who can do this in a pinch, I will simply have to buy and hotwire them myself, but I thought I'd ask first what might be out there, and how much you would want for it. I'm not in any emergency situation so no hurry.
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I am looking for thin polyurethane foam sheets
Jun 18, 2012, 11:06 AM #2
What is it you're trying to do?
PU blanks are generally thinned by planing, not hotwire. EPS is sometimes hotwired, but usually planed as well.
What am I doing?
I need the scraps to fix and alter old boards. But in this case, rather than fixing a small delamination, I am fixing a major portion of a board, and I would like to do it without putties or cabosil/resin mixtures to get the best strength/weight ratio. I could just cabosil but this method could be better in the long run. It just takes more patience.
Jun 18, 2012, 10:43 PM #4
- Join Date
- Jan 2009
- milton delaware
I might give foam a try
When I first thought about this issue, I looked into pour foam. At first, I felt that it might be too expensive compared to just using shavings. And I wanted something higher than 2lb. density - I wanted like 8lb. But when I priced it out, it's like at least 40 or 50 bucks and I was worried that I might ruin my board. But I'll still look into this. Thanks for the link - it looked pretty easy there but it's not as easy to pour foam onto a board. But I can put a piece of 24" plywood over the board and weight it down. It might work since it's a concave I'm filling in. Who knows?
True, hotwiring is normally done to EPS foam. I would perhaps need a saw. I just want some thin sheets of polyurethane foam - about a 1/2" or even less in thickness. In a sawmill, they would just run a block of wood through a saw and cut it. One could probably do the same with polyurethane foam. However, I really would like sheets that are the same size as typical foams - say 24" x 6 - 8'. I would take stuff only 3' long if that's all there is. I'm really just challenging myself to think how I would cut such a piece of foam if this type of thing isn't around handy. I don't think that it would be easy to do with a planer without making a mess. I'm sure that I could use a handsaw on a polyurethane blank though, and come up with usable (thin) sheets of foam. It just takes some patience. I've decided that I'll just use a handsaw on some block foam. Done deal.
A thought occurred to me that I might try some strips of wood. I have shaped wood fins and they are perfectly fine - I've done cedar all the way up to Brazilian Walnut. I just have to decide what strength wood I want to use for the purpose at hand. It might work to use wood. Easier to find wood than strips of foam. Hah-hah.
Jun 18, 2012, 11:08 PM #8
Yes... pour foam would be best. In order to get a good bond with the thin sheet and the blank, you need a smooth, uniform surface, which could be hard to get.
So... I guess this is some really valuable board worthy of restoration???
It's a valuable board in the sense that it has no major flaws and I caught 30 waves on it yesterday, but it doesn't plane properly hence my altering the bottom's shape. It's just an ok board - but boards are like animals - they are all cool in their own way, irregardless of how ugly they might be to a girl.
Correct me if I'm wrong, 2lb. density might be enough, but 3lb. would be better for heavier surfers or tow-boards or guns. I think I need at least 3lb. density or I'll wind up with too many pressure dings.