Fabienne Micheline Cassman on tue 31 jul 01
At 10:18 PM 07/31/2001 +1200, you wrote:
>Adding extra insulation to the outside of a lid or wall can bring the
>manufacturers materials to a temp. above their normal range..hence a
>cracking of firebricks and a redhot lid.
Thank you for the illuminating reply! The obvious solution would be to add
insulation under the lid since I am not ready to rebuilt the
lid. *Guh* That should keep the lid cooler rather than hotter and avoid
the cracking. I'm willing to loose an inch or so of clearance if I can
keep my elements longer and fire more efficiently.
The material would have to stay in one piece and and not fly around the
kiln during firing ruining every glazed pot in there. Some contraption
must be made to hook the insulation in place without it falling. And the
whole thing would have to withstand cone 10. What comes to mind is on the
line of how a steamer pot is made with the nested colander etc.
Unfortunately, I'm not familiar with what is available that's rigid enough
to last and be relatively safe to handle that fits those
requirements. Does anyone have half an idea? :) There has to be a way to
do this. Grrrrrrr :)
Cheers,
Fabienne
--
Milky Way Ceramics http://www.milkywayceramics.com/
Yes, I have learned from my mistakes...
I can reproduce them exactly.
Richard Jeffery on tue 31 jul 01
how about a circle (or whatever) of insulating board (sorry - forgotten what
it's called in UK) wired through the fibre through the lid to ceramic
buttons or buckles on the outside? I'm not going to draw it, but from the
inside of the kiln up, the layer would read board, fibre, kiln lid. If it's
a tight enough fit, allowing for any expansion if any, it should hold fibre
in place and prevent any dropping down. If you thought there was a danger
of compressing the fibre too much, you could make some small ceramic
cylinders as spacers, and run the wire though that.
or spray it with rigidiser (again, I've forgotten the name)- that works fine
on my fibre raku kilns.
Richard
Bournemouth UK
www.TheEleventhHour.co.uk
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Fabienne Micheline Cassman
Sent: 31 July 2001 19:09
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Kiln Lids (Was: insulating kiln lids - caution!)
At 10:18 PM 07/31/2001 +1200, you wrote:
>Adding extra insulation to the outside of a lid or wall can bring the
>manufacturers materials to a temp. above their normal range..hence a
>cracking of firebricks and a redhot lid.
Thank you for the illuminating reply! The obvious solution would be to add
insulation under the lid since I am not ready to rebuilt the
lid. *Guh* That should keep the lid cooler rather than hotter and avoid
the cracking. I'm willing to loose an inch or so of clearance if I can
keep my elements longer and fire more efficiently.
The material would have to stay in one piece and and not fly around the
kiln during firing ruining every glazed pot in there. Some contraption
must be made to hook the insulation in place without it falling. And the
whole thing would have to withstand cone 10. What comes to mind is on the
line of how a steamer pot is made with the nested colander etc.
Unfortunately, I'm not familiar with what is available that's rigid enough
to last and be relatively safe to handle that fits those
requirements. Does anyone have half an idea? :) There has to be a way to
do this. Grrrrrrr :)
Cheers,
Fabienne
--
Milky Way Ceramics http://www.milkywayceramics.com/
Yes, I have learned from my mistakes...
I can reproduce them exactly.
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