small part in cast iron

Discussion in 'Lost PLA casting' started by dtsh, Feb 5, 2019.

  1. DavidF

    DavidF Administrator Staff Member Banner Member

    In shell... yes...in block I've done it 15 or so times, but that was under vacuum assist..
     
  2. DavidF

    DavidF Administrator Staff Member Banner Member

    Clear coating them to get rid of the print lines.
    Will be shelling them up this weekend.
    20190213_125421.jpg
     
  3. Mister ED

    Mister ED Silver

    David, what are you using to coat with? I used a primer on a PLA a gear I sent to Pat, but sanding was a major PITA.
     
  4. DavidF

    DavidF Administrator Staff Member Banner Member

    It wet sands well with 320 grit...
    20190213_131926.jpg
     
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  5. Mister ED

    Mister ED Silver

    Who woulda thunk? Thanks, I even have a can of that.
     
  6. DavidF

    DavidF Administrator Staff Member Banner Member

    Ok, so the foundry is back up and running. Poured 16 parts and had the kiln trip the breaker letting the flasks cool off too much and having the investment fracture a bit on 4 of the castings. Good thing I only needed 12 :D
    So now back to this project....
    Treed up the parts tonight with a couple different gating strategies and ran into another problem.... I cant get the friggin lid off the suspenda slurry :mad::mad: I'll take a hammer to it in the morning, wife sleeping right now...
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  7. DavidF

    DavidF Administrator Staff Member Banner Member

    First coat of suspend a slurry going on.
    Hope to pour in a few days..
    Glad I havent redone the fireplace room yet or my wife probably would not let me do this inside.
    20190302_192528.jpg
     
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  8. PatJ

    PatJ Silver

    The outcome of this method is going to be interesting.

    .
     
  9. DavidF

    DavidF Administrator Staff Member Banner Member

    Putting on some weight now...God I hope the shell doesnt crack when fired.
    20190304_132427.jpg
     
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  10. Jason

    Jason Gold

    "Ceramic shell casting, by an open fire" "Wife bitching up a storm....." okay, not a songwriter.:rolleyes:
    Yeah! Me too! How many layers of stucco you going with? A DOZEN?
     
  11. DavidF

    DavidF Administrator Staff Member Banner Member

    Ten has worked well so far....
     
  12. DavidF

    DavidF Administrator Staff Member Banner Member

    Ok. I think it has enough layers now..
    20190307_001801.jpg
     
    Last edited: Mar 6, 2019
  13. Jason

    Jason Gold

    Fingers crossed.
     
  14. DavidF

    DavidF Administrator Staff Member Banner Member

    Cross your toes too...;)
     
    Jason likes this.
  15. PatJ

    PatJ Silver

    I need to think of something to tell you so I can tell you I told you so, but nothing is coming to mind.
    Drumroll........
     
  16. DavidF

    DavidF Administrator Staff Member Banner Member

    There is no written rules or books on lost pla casting. Sometimes you just have to try it and see what happens... If the shell holds up, I am certain I'll be just fine. But I am pushing the limits of the shell material....
     
  17. This is interesting.

    I do have a question. Is this all to replace one missing chair hinge, or is there a market for these?

    Good exercise anyway.
     
  18. dtsh

    dtsh Silver

    One hinge, the market for them evaporated somewhere in the nineteenth century I believe.
    I don't have a picture of it or I'd share, but it is an interesting chair at least; which reminds me I need to hassle her for some pictures.
     
  19. DavidF

    DavidF Administrator Staff Member Banner Member

    It's an experiment.... have you seen anybody do a lost pla ceramic shell cast iron pour before?? ;)
     
  20. crazybillybob

    crazybillybob Silver Banner Member

    All I can say is get on with it the suspense is killing me :rolleyes:
     

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