Great, hope to hear from you about the design, I am looking forward to constructing one of them soon.

George

KeystoneArt.org

I was wondering the same thing. I am new to the site, but have found a lot of information thus far. The size I am looking to build is a small scale around 12"x12".

Klantz,

That is much smaller that what I need.  I would think a small squirrel cage blower piped into a wooden box or small bucket would work.  Try using a layer or two of an old shirt as the plenum - that should support that small amount of sand needed in a bed of that size.  My issue is that I am in need of constructing a commercial sized unit. Sized to my investment slurry tank which is 48 inches in diameter.  Right now the slurry tank is much larger than the works that I can cast, for two main reasons...one is stucco application ( a bed would solve that) and my burnout kiln.  It is going to be rebuilt too.

Here is a link to see some of what I have been doing, you can see the slurry tank in the 7 min video.  I built the the mixer too.

http://www.facebook.com/profile.php?id=1648339910&ref=name#/video/video.php?v=60333657533&oid=58266467968

KeystoneArt.org

I had thought of old tshirt, but what I think I'm going to use is some ceramics sifters, I think anything above about 200 mesh should be good and it will be much more durable. For yours, Could you make the plenum out of say re enforced peg board with the holes covered with the same kind of mesh? The holes would be evenly spaced and as long as you had access to the underside, you could block as many holes as it would be necessary to get the right amount of pressure throughout the bed.