Large ceramic shell burnout kiln for lost wax - Zapins

Discussion in 'Furnaces and their construction' started by Zapins, Jan 3, 2019.

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  1. Zapins

    Zapins Gold

    First pour went well. Did 3 molds including the screw. Nothing crazy happened so I hope it went ok. Small shrinkage hole in the pouring cone so we will see how it turns out in a couple mins when it's cool enough to crack open.

    15486391873484383022666056948264.jpg 20190127_203345.jpg
     
    Zapins, Jan 27, 2019
    #101
  2. Zapins

    Zapins Gold

    Ok ok I got too impatient. Cracked it open. Looks good. No defects that I can see. Will cool it more and blast it for final inspection. The eagle is next.

    20190127_204130.jpg
     
    Zapins, Jan 27, 2019
    #102
    Mark's castings likes this.
  3. oldironfarmer

    oldironfarmer Gold

    The cracks in the panels looked to me like the panels were restrained and bowed inward into the furnace. The warpage Kelly showed would have caused them to bow outward. It looks to me like the panels grew from the heat and expanded into the box to relieve their stress against the cooler metal frame. Was that possible?
     
    oldironfarmer, Jan 27, 2019
    #103
  4. Al2O3

    Al2O3 Administrator Staff Member Banner Member

    The Satanite coating shrank when cured. A very thin coating with a lot of water will shrink more than a drier mixture. That made the surface area on face of the coated face of the board smaller. That would make the board concave or like looking into a dish. I think that's what the pictures and fractures show. Seen it occur in many materials....composites too.

    Best,
    Kelly
     
    Al2O3, Jan 27, 2019
    #104
  5. Zapins

    Zapins Gold

    I did use a very watery mix.

    The eagle finally cast bros! And it looks like a good copy from what I can see.

    Still 1 to 2 more pours left to do tonight. 2nd bird and other stuff. It's like Christmas of my own doing.
     
    Last edited: Jan 27, 2019
    Zapins, Jan 27, 2019
    #105
  6. Zapins

    Zapins Gold

    Here are some sneak peeks. I'll clean them up and sort the photos into their respective threads for completeness later.

    20190127_224021.jpg 20190127_224036.jpg 20190127_224057.jpg 20190127_224112.jpg
     
    Zapins, Jan 27, 2019
    #106
    Tobho Mott, Jason and Mark's castings like this.
  7. Al2O3

    Al2O3 Administrator Staff Member Banner Member

    Congrats Zap. That will be a very nice piece.

    Best,
    Kelly
     
    Al2O3, Jan 27, 2019
    #107
    Zapins likes this.
  8. dtsh

    dtsh Silver

    Looking good! I can't wait to see the updates.
     
    dtsh, Jan 27, 2019
    #108
    Zapins likes this.
  9. DavidF

    DavidF Administrator Staff Member Banner Member

    The Eagle has landed!!
     
    DavidF, Jan 27, 2019
    #109
    Zapins likes this.
  10. Jason

    Jason Gold

    YAY.. the sweet taste of success! Way to go zapola!
     
    Jason, Jan 28, 2019
    #110
  11. Tobho Mott

    Tobho Mott Administrator Staff Member Banner Member

    Awesome, can't wait to see them all finished up!

    Jeff
     
    Tobho Mott, Jan 29, 2019
    #111
  12. Petee716

    Petee716 Gold Banner Member

    Great work Zap!

    Pete
     
    Petee716, Jan 29, 2019
    #112
  13. Zapins

    Zapins Gold

    Here's an interesting design for getting shells out.
     
    Zapins, Feb 12, 2019
    #113
  14. Jason

    Jason Gold

    Yeah I saw that the other day. Square pouring cups?? I don't think so.
     
    Jason, Feb 12, 2019
    #114
  15. Zapins

    Zapins Gold

    Yeah I wonder if it would work better? Seems a bit weird to me but then again so did square sprues initially.
     
    Zapins, Feb 12, 2019
    #115
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