Rick,
Thanks that sounds like a good idea. When I made this foundry I placed a plastic trash bag between the body & lid to keep it from sticking together, & they matched up great. But over the years I have had to repair the lid once or twice, and the center of the base at least once, but never went through that same process when making repairs.
Brian
--- In gingery_machines@yahoogroups.com, "RG Sparber" <rgsparber@...> wrote:
>
> Brian,
>
> You should be able to run your hands a few inches away from the furnace and
> feel the heat coming from any gap.
>
> I fixed my gap by buttering down some black furnace cement. While wet, cover
> with some cardboard and fit the parts together. Then bring up the furnace
> slowly. The cardboard burns up and puts down a layer of ash which prevents
> sticking. The cement conforms to the surface. Worked great for me.
>
> Rick
>
> -----Original Message-----
> From: gingery_machines@yahoogroups.com
> [mailto:gingery_machines@yahoogroups.com] On Behalf Of confed2001
> Sent: Monday, September 12, 2011 7:21 PM
> To: gingery_machines@yahoogroups.com
> Subject: [gingery_machines] Re: Electric furnace parts update
>
> Ron,
> The Elements you use are the same thing I had. (I say had `cause my pot had
> a blowout on my last melt, and shorted out the element!) Anyway, the
> controller is homemade and uses 2 SCRs that are rated at 600V / 70amp. This
> is tied into a Lutron dimmer switch. The switch comes with a very low rated
> triac so that was replaced with one rated for 400v.
>
> After thinking it over I really don't think it's the controller so much as I
> am just losing heat from the seams between the base, body, & lid. Most
> likely it is between the body & lid. I've ordered a new heating element &
> should have it in by the end of the week. I plan on installing it this
> weekend, and running it at night. Kill the lights out side the shop & see
> what I can see.
>
> As for the refractory we once had a foundry here in Louisiana (that was
> knocked out by Katrina). I got two 5 gal tubs of high temp cement from them
> for nothing, and used that for the base & lid. The body has an inner wall of
> fire bricks that have been notched for the heating element, and between that
> & the outer metal shell it was packed with more refractory. Short of making
> another lid I was considering using that ceramic blanket you showed in your
> post to help seal the gap between the lid & body like a gasket. I've also
> been considering building the Gingery charcoal foundry with the remaining
> refractory I have..but than again..
>
> Anyway, thanks for all the help
> Brian
>
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