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  #51  
Old 09-01-2017, 07:43 PM
Dan Vanantwerp Dan Vanantwerp is offline
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I was thinking of garden hose also and was visualizing trying to get the form out. Attach the screws to the backer tube from the inside of the sonotube and the release should be as easy as removing the screws.
Love it!
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Old 09-01-2017, 09:56 PM
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It came out without too much cursing. The castable actually filled in a little too well. I had to take a masonry grinder to a couple of spots to open it up. Not a big deal, it ends up being a super thin section. Even with that work I still considered it super easy.
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  #53  
Old 09-02-2017, 07:17 AM
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can you post a picture of that jordan?
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  #54  
Old 09-02-2017, 12:07 PM
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Reminds me of the pool noodles used in Hugh's recuperation workshop.

Styrofoam is also nice for these kinds of applications 'cause you can also just dissolve it with acetone in tricky spots.
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Old 09-02-2017, 09:56 PM
Allan Gott Allan Gott is offline
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I can see where this thread is headed if/when Jordan can post a pic....great/definitive idea....well done

Shaving a section of the backer rod off prior to connecting it to the sonotube -"C" (connect the letter tips) - would provide a controlled gap to allow easy element installation/change.

Last edited by Allan Gott; 09-02-2017 at 10:08 PM.
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  #56  
Old 09-06-2017, 03:31 PM
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Quote:
Originally Posted by Pete VanderLaan View Post
can you post a picture of that jordan?
I can. These are the molds before they get poured. Side wall and base.
Attached Images
File Type: jpg 40 furnace mold resize.jpg (77.2 KB, 39 views)
File Type: jpg 40 pound furnace mold base resize.jpg (86.8 KB, 42 views)
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  #57  
Old 09-06-2017, 04:10 PM
Dan Vanantwerp Dan Vanantwerp is offline
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Dan liked Jordan's pics

How thick is the final casting...2"?
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Old 09-06-2017, 08:05 PM
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The base is 5" tall total with a 2" thick dish, leaving 3" on the bottom. Anything less won't hold up to a hammer. The side walls are 4" thick and have the 2" element cavities. I wanted to make them 3" think but had a hard time finding the exact sonotube size locally. I think it was 20" that I needed. I'm really itching to finish this. The panel is part way wired, the rest is hooking it up to the furnace and plugging it in.
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  #59  
Old 09-06-2017, 09:29 PM
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Jordan, there are holes in the bottom.
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  #60  
Old 09-06-2017, 10:06 PM
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Pretty sure those are just screws fastening the smaller round piece of foam to the rest of the foam mold form.
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  #61  
Old 09-07-2017, 02:49 PM
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Quote:
Originally Posted by Rick Kellner View Post
Pretty sure those are just screws fastening the smaller round piece of foam to the rest of the foam mold form.
There's a monthly sarcasm quota that must be met around here.
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  #62  
Old 09-08-2017, 11:09 AM
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Did you spiral the hose up the side or did you make individual rings so each element fits a ring Vs one element spiral. Does it matter?
Franklin
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  #63  
Old 09-08-2017, 11:59 AM
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They are individual rings. One set of elements on each side of the pot. The Denver elements have a bend in them that makes this possible. I mortared a piece of firebrick into the middle so they can't accidentally touch each other.
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  #64  
Old 09-08-2017, 12:12 PM
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Thanks. I would never have guessed that one.
Franklin
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