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Re: Foam toroid?

Original poster: "Neal Namowicz" <mr_neal@xxxxxxxxxxxx>
That foam sounds like the same stuff that's sold in aerosol cans for insulating, especially when installing new doors and windows. The problem is, it sticks very well to whatever it's sprayed on, so getting it out of a mold in one piece might be a problem. Maybe a little WD-40 on the mold would work. 

Neal.

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, June 16, 2006 11:12 AM
Subject: Re: Foam toroid?



Original poster: Ben McMillen <spoonman534@xxxxxxxxx>
My uncle is a taxidermist and he uses a 2 part foam to make forms for his mounts. The foam is mixed from two chemicals which react and expand rather quickly. The density of the foam is determined by how well it is contained in the mold. If one were to create a torroid type mold, you could probably mold one pretty easily. Any surface defects could be remedied using a slow turning lathe setup and some sandpaper or home made turning tool.. 

Then you've got your foam torroid ready for coating..

Just my 2 cents..

;)

Coiling In Pittsburgh
- Ben McMillen


Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: "James Zimmerschied"

Doug,
I made a small toroid from a foam wreath, it was about 12" x 1.5"
cross section. I used aluminum foil glued to it for a conductive
surface. It worked well and looked ok. I never could find the foam in
a larger cross section - otherwise I would have made more of them.
Jim Zimmerschied
----- Original Message -----
From: Tesla list
To: tesla@xxxxxxxxxx
Sent: Thursday, June 01, 2006 10:41 AM
Subject: Foam toroid?

Original poster: Tesla Coil list
<tesla@xxxxxxxxxxxxxx>

So I'm sitting here playing with JavaTC and thinking about differnt
top loads I could use for my first coil, and something came to mind.

Has anyone used a "styrofoam" craft ring/wreath? they're not really
the puffed polystyrene like real styrofoam, it's that hard crumbly
white foam.... it's sold at craft stores in various shapes... eggs,
cones, spheres, flats, etc.... but I have seen various sizes of rings
made of the same stuff....

So has anyone used this, wrapped in foil and Al tape? How does it
work compared to the dryer duct?

Thanks,

-Doug