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Post by cletus on Apr 6, 2020 7:27:53 GMT -8
I'm thinking about putting together the molds for the castable portions of the DSR2 core but have never done this sort of thing. I've watched some videos and think I understand how it goes, but just wanted to get second opinions. It seems to me that a plywood base, wooden perimeter, with a wooden block to create the top port could be screwed down for the pour and removed afterwards. Similarly, after that pour had been made, another wooden assembly could be screwed to the perimeter mold as shown in this link (.skp file). Is okay to pour the stumbling block portion at the same time or should I let the first pour cure a bit and then pour the stumbling block...or am I going about this all wrong? drive.google.com/open?id=18-Brnnpolcs09hkQrT--9jIcTNzhSLR8Thanks in advance! |
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Post by scottiniowa on Sept 19, 2020 11:58:44 GMT -8
did you do as described? if so, in which way and how did it turn out?
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Post by Orange on Sept 20, 2020 5:26:15 GMT -8
sounds like a lot of work, whats wrong with CFB or firebricks?
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Post by Vortex on Sept 21, 2020 0:48:13 GMT -8
CFB is very expensive and easily damaged from abrasion. Firebrick fireboxes have a lot of mass which isn't always desirable. Small splits are hard to hold in place, too strong a mortar will crack and a too weak one will allow the splits to move, both of which can lead to the firebox lining falling apart. A good cast doesn't have any of those issues.
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Post by scottiniowa on Oct 15, 2020 5:49:41 GMT -8
I'm thinking about putting together the molds for the castable portions of the DSR2 core but have never done this sort of thing. Thanks in advance! Cletus, perhaps you answered elsewhere, but did things work out for you? on the casting? It has been about 6 months and I am curious |
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Post by Deleted on Oct 15, 2020 7:24:29 GMT -8
CFB is very expensive and easily damaged from abrasion. Just choose the kind of CFB, intended for the application. Or arm cheaper fiber boards with something suitable. It is no problem to arm basalt fiber boards for use at high temperatures.
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Post by hallinen on Oct 15, 2020 20:43:31 GMT -8
I checked out the basalt fiber board, it is rated to 1800 F and is described as being flexible. Kari, when you say “arm” it, what exactly do you mean and how do you do it? Thank you.
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Post by Deleted on Oct 16, 2020 6:17:43 GMT -8
I checked out the basalt fiber board, it is rated to 1800 F and is described as being flexible. Kari, when you say “arm” it, what exactly do you mean and how do you do it? Thank you. Without adhesives CFB boards would have a low strength too.
"arm" in the textile industry used in the sense of equip, fit out, fit up, kit out, kit up, power, prepare, tool up.
Just soak it with something suitable.
In general all slurries of refractory materials are suitable as refractory coating, but some may require additional adhesives respective hardeners.
Clay or grog slurries, Rigidizers for CFB, Refractory cement,
Geopolymer........................
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