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 Post subject: foam core + Qs
PostPosted: Mon Apr 14, 2008 6:14 am 
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Joined: Wed Apr 09, 2008 12:49 pm
Posts: 8
Hey guys,

Getting started on my first proper board (built heaps of plyboards over the years).

I'm thinking about using a PVC foam for the core, simply because it's easier to get hold of and cheaper than corecell. The site says the product is suitable for marine use and is water resistant. I'm thinking of ordering some 10mm sheets.

As for vacuum bagging, I'm currently working on finding the peel ply (although I have heard that you can find materials with similar properties for a fraction of the price - coat lining etc...) and also tracking down suitable plastic. What stuff should I be using? I'm thinking the most important property of the outer plastic is just airtightness, right?

I found this site: http://www.roarockit.com/rc_wood.php

Has anyone had any experience with these? I would have to order a custom size, but they still look pretty effective.

I'll be using a silk sheet in the board layup for graphics, although still considering buying some PBT for the next one...

epoxy siderails, 18oz of fibreglass cloth...

I've read through most of the stuff on this forum... any final words of wisdom before I take the plunge and start killing my braincells with resin 8) ?

Cheers, Will


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 Post subject: Re: foam core + Qs
PostPosted: Mon Apr 14, 2008 5:07 pm 
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Joined: Thu Nov 02, 2006 5:12 pm
Posts: 76
I use a modified fridge pump, cheap and works like a dream


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 Post subject: Re: foam core + Qs
PostPosted: Tue Apr 15, 2008 1:44 am 
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How hard is it to run the pump from AC power? Is it simple enough to wire it up, so it runs directly out of the wall?

I haven't been able to find a detail "step by step" method for running a fridge compressor as a vacuum bag pump.... how easy is it?

I think I may have found a better source for Divincell foam. I'm guessing its far more suitable than PVC right?

Cheers, Will


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 Post subject: Re: foam core + Qs
PostPosted: Tue Apr 15, 2008 7:38 am 
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Joined: Thu Nov 02, 2006 5:12 pm
Posts: 76
A fridge pump runs from AC so a Google search for "cheap little sucker"

This will return all you need to know.


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 Post subject: Re: foam core + Qs
PostPosted: Tue Apr 15, 2008 12:45 pm 
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Joined: Wed Apr 09, 2008 12:49 pm
Posts: 8
sweet article, thanks man.

Also found these two over on the yahoo boardbuilders forum.
http://www.dream-models.com/eco/vacuumpump.html
http://www.joewoodworker.com/veneering/welcome.htm

Right, who has a fridge that I can borrow? :D


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 Post subject: Re: foam core + Qs
PostPosted: Tue Apr 15, 2008 3:23 pm 
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Joined: Wed Nov 20, 2002 1:00 am
Posts: 908
Location: rhode island
divinylcell is one flavor of pvc foam

this explanation may help with shopping for core stock
http://boatdesign.net/articles/foam-core-properties/

joe woodworker tutorial is a good one.

fiberglast has laminating supplies and some good tutorials
http://www.fiberglast.com/



regards
-bill


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 Post subject: Re: foam core + Qs
PostPosted: Tue Apr 22, 2008 12:57 pm 
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Joined: Wed Jan 16, 2008 1:57 pm
Posts: 187
Location: Canada
There is lots of information here, good work boys, thanks a lot , it has helped me to understand better the process of building a board. this post is the best one i have read, and i have read lots.
thanks again.

Ch


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 Post subject: Re: foam core + Qs
PostPosted: Wed Apr 23, 2008 1:19 am 
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Joined: Wed Apr 09, 2008 12:49 pm
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Time for an update:

I have the fridge compressor all set up and ready.

I'll be buying the glass/resin/vacuum material/release film later this week.

As for the core, I'm thinking of switching to paulownia, simply based on cost and strength.

Now I'm searching for any info related to making fins. I think it should be a relatively simple process, once a mold is produced. Anyone know of any relevant sites describing the process? Perhaps there are some alternative suggestions....

Cheers, Will


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 Post subject: Re: foam core + Qs
PostPosted: Tue Jul 15, 2008 3:41 pm 
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Joined: Sat Jan 03, 2004 4:57 pm
Posts: 24
Location: Riga, Latvia
Is Dcell h45 enough as a core? 10mm


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