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Thread: what did you do in your foundry today?

  1. #4841
    yea, I know it was you, you actually went into alot of detail that you dont see on alot of other videos on lost wax and why I defenitely recommend it as a watch for anyone doing shell investment casting. It's also why I made sure to brush the PoP/sand into the threads and part using a thinner first coat, and brushed it on because of what you did in your video and how it would pick up the details and not get the air bubbles trapped. It was defenitely a good series to watch and I for one learned quite a bit from it, and is also probably the reason why my half nuts turned out as well as they did tbh.
    Last edited by cae2100; 10-05-2017 at 12:51 AM.

  2. #4842
    Moderator DavidF's Avatar
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    You need about 9 layers of it. It takes several days to complete the shell. Burn out can be completed in about 2 hours which is nice.
    A calm sea does not make a skilled sailor...
    http://thehomefoundry.org

  3. #4843
    Good Day Dears
    any body here work on WERTLI copper alloys horizontal continuous casting ???

  4. #4844
    Senior Member evlwht-guy's Avatar
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    Made a front end alignment jig for my car....see it at http://www.alloyavenue.com/vb/showth...526#post207526

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  7. #4847
    Senior Member Tobho Mott's Avatar
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    Looks good evl!

    For those who only check 'new posts'...
    I edited in a link to a video of the melt/pour/shakeout for my sister's house number plaque over in the thread where I've been documenting that project: http://www.alloyavenue.com/vb/showth...l=1#post208363

    Jeff
    Tobho had learned to work Valyrian steel at the forges of Qohor as a boy. Only a man who knew the spells could take old weapons and forge them anew.

    How I built my oil furnace | My Photo Album | My Videos | TheHomeFoundry Forums

  8. #4848
    Foundry Destruction!

    I've been saving this post till I had the pictures of the aftermath. Long story short, I finally had a reasonably successful two part mould Iron casting. I was casting my 1/2 scale civil war mortar (unfortunately not a fireable one). In the process of firing the furnace, I melted my lid, which fluxed the furnace insulation badly. The lid caved in and the the hotface delaminated from the furnace interior and began to crumble. My friends who were helping managed to save the day by cutting an 18 inch diameter 4 inch thick round slab from a tree. We literally used this wet piece of wood as a lid for the last hour of firing.

    Here are pictures of the furnace afterwards.

    The second picture, through the tuyeer, you can see that, slag, metal and refractory has accumulated to the point where it is half obscured. The third and forth pictures show cracks in the castable refractory hotface. The insulation layer is ceramic kiln brick, which has badly glazed over from the direct heat and fluxing action of 2,000 F cement which melted in. The last picture shows an interesting carbon deposit directly opposite of the burner.

    What happened is I cemented the firebrick lid together with cement only rated for 2000F. This melted, causing the lid to crumble. The melted cement got into cracks in the lining which had been present for years. This destroyed the bond between my hotface and insulation, causing the hotface which had cracks to crumble in. The insulation began to melt from now direct flame contact and fluxing.

    I plan to rebuild the furnace with the same method I previously used. This furnace lasted six years and was heated to iron temps probably a dozen times, but was only destroyed after the fluxing problem. So now I'm hunting around for an old ceramics kiln to reuse the brick out of.
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    Use those coffee makers with the spout out the bottom to preheat you oil!

    My foundry: http://www.alloyavenue.com/vb/album.php?albumid=1

    My waste oil burner:http://www.youtube.com/watch?v=NwpKCsiWKls
    Metal casting video:http://www.youtube.com/watch?v=8ui24..._order&list=UL

    My website : maniacmechanics.blogspot.com

  9. #4849
    Senior Member TRYPHON974's Avatar
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    Actually it was yesterday, I cast with a friend the occitan cross and some fishing weight molds.
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    Jack of all trades, master of none.
    http://fournaisedupiton.blogspot.com/

  10. #4850
    Senior Member Tobho Mott's Avatar
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    Nice work Tryphon974, I saw the cross casting over in its thread too, looks good!

    Bill, omg that sucks... Great pictures though. Did you at least get a good pour in the end?

    Jeff
    Tobho had learned to work Valyrian steel at the forges of Qohor as a boy. Only a man who knew the spells could take old weapons and forge them anew.

    How I built my oil furnace | My Photo Album | My Videos | TheHomeFoundry Forums

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