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RE: Foam-core Toroids

Hi Brian:

If this guy is in the boat molding business and has access to the foam in
bulk, perhaps he could just inject it into a truck tire inner tube.  While
it clearly wouldn't have a rigid sidewall, so what if it expands while it
cures?  As long as it expands uniformly, the inner tube would guarantee a
perfect shape!

Don't worry about the conductive coating.  Aluminum tape is cheap (at least
in the US), goes on easily, looks nice, and works well.

Regards, Gary Lau
Waltham, MA USA

>Original poster: "brian foley" <ka1bbg1-at-mcttelecom-dot-com> 
>Hi Gary, I'm just up the road and hour or so from you in nh. I had been
>talking to a guy who ran a plastic molding shop(vacum formed) and tried to
>get an idea of how to mold foam as well. He says to get density control you
>must be able to cap off the container your filling and having just the
>amount of foam helps. As it needs to be capped off this means the mold has
>to have a lot of sidewall strength. I am still trying to come up with a
>I wunder if there is a conductive coating that could be aplied inside the
>mold first so the end result would be a smooth outer conductive
>how all these fancy bass boats are made.) gel first then decals then color
>then fibre layer. hmmm  cul brian