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High temperature molds and materials
Posted: Fri Mar 14, 2003 5:47 pm
by winship
Does anybody out there know anything about high temp. refractory molds.
When I say high temp I mean in the 1800 - 1900 F. range. I know this is well beyond the range of soft glass but I have another purpose in mind.
If anybody can help it would be greatly appreciated.
Thanx.
I would also be interested in any moldable material that could be used at the same temps.
Posted: Fri Mar 14, 2003 5:51 pm
by Amy Schleif-Mohr
Are you looking to use the mold many times?
How intricate are you looking to get?
Amy
Posted: Fri Mar 14, 2003 8:24 pm
by Clifford Ross
Winship- make your own molds from clay.
Posted: Fri Mar 14, 2003 9:20 pm
by Marty
graphite will work.
Posted: Sat Mar 15, 2003 6:49 pm
by winship
for the time being I just want to use simple bowl molds and drop rings'
I would at least like to get ten to fifteen cycles out of each mold.
What kind of clay?
Posted: Sat Mar 15, 2003 7:54 pm
by Colin & Helen
Bisque fired Stoneware.....or Raku ..I have used some of my moulds several hundred times.. I have only had one mould fall apart......that one was made form Terracotta clay that been over bisqued........Colin
Posted: Sun Mar 16, 2003 3:29 pm
by winship
Thank you all for your responses, I look forward to trying some of your ideas. I will check back and let you all know how the project is going in the next couple of days. Once again thanx.
Brent.
Posted: Mon Mar 17, 2003 2:14 am
by watershed
You could always go for, castable refractories, Cast-o-lite X etc. But you start losing details.
Greg
Posted: Mon Mar 17, 2003 10:53 pm
by lohman
I've used castolite. Plan on test firing before you fire a full kiln. I fired a load in which I had castolite molds, steel molds, ceramic molds and ceramic fiber molds and the glass on castolite over-fired. the other pieces were fine. My thinking is that the castolite retained the heat much longer than the other materials. Also the castolite molds were much thicker that the other molds. Good luck.