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Thread: The Bucket Foundry

  1. #4966
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    12th March 2010 - 16:56
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    The red patterns are Glenn's, they should have been used years ago but now I have to cast some cylinders might as well have a hack at one and see what happens.

    The other is the 175cc uniflow cylinder, another failure so it got cut in half to look what went wrong. A core slipped.

    Now I have another stacked up ready to pour.

    And here, some pictures of last weeks castings. Two more 360 cylinders and two Subaru EA81 four port cylinder heads
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  2. #4967
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    13th June 2010 - 17:47
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    I think I was the delivery system for those patterns of Glenn's. It has been a while. Weren't they warped ?
    Can you work around that ?

  3. #4968
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    12th March 2010 - 16:56
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    Yes they were but sitting in my dry (ish) shed all this time they seem to have straighted out again. Im not entirely sure how it all fits together but I guess Im finding out now. Just make some sand parts and see.

  4. #4969
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    12th March 2010 - 16:56
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    Now I see why I havent done these before, the centre core is so intricate that its almost impossible to fill. Asking a foundry freind this evening it seems the patterns were designed to run in a cold sand blowing machine. There is only one such machine in NZ and they dont do out work.

    Looks like I might have to modify the die to get access to the intricate exhaust. Then have a plug fit in to seal it off afterwards. Or make a cold core blower, will need to consult the patterns owner I guess.
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  5. #4970
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    12th March 2010 - 16:56
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    The transfer cores come out well.
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  6. #4971
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    I can see the pattern's owner now searching the internet for a tutorial on making a cold core blower from old truck parts.....

    OTOH, it wouldn't surprise me if there's one in his dad's collection of "useful shit"

  7. #4972
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    12th March 2010 - 16:56
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    Unfortunately it requires some nasty chemicals, I doubt Its avaialble to general public. Triethalamine gas, aparently not so good for people.

  8. #4973
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    20th January 2010 - 14:41
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    DEA would not share how they done it.
    plus i have been up Blenheim and back today so no googling Greg.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  9. #4974
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    12th March 2010 - 16:56
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    Quote Originally Posted by husaberg View Post
    DEA would not share how they done it.
    plus i have been up Blenheim and back today so no googling Greg.
    Sooo, do I modify the core box?

  10. #4975
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    20th January 2010 - 14:41
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    Quote Originally Posted by Flettner View Post
    Sooo, do I modify the core box?
    i say Do what you need to make it work.
    That other stuff smells like a smelly cooter.
    i think there is a video of someone using the original process.
    it might have been in this thread with the Italian giani.
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  11. #4976
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    12th March 2010 - 16:56
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    This is how my core box works, sand can be loaded from the top, bottom and through the exhaust port. Easy access.
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  12. #4977
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  13. #4978
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    thanks Frits i did have all the letters though, i think this was the video sequence i was looking for






    Aws you have said before the photos are in english.

    4.37 in the second video i believe he says its a Amine catalyst.
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    then i think it says
    he puts sponge on top to defuse it as its applied at about 58 PSI
    or it could be a recipe for some fine food
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  14. #4979
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    12th March 2010 - 16:56
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    Lowering the exhaust port timing, simple as a bit of bondifill. These next cylinders will be for another Autogyro engine, lower rpm, lower exhaust.
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  15. #4980
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    12th March 2010 - 16:56
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    360 sand cores in place.
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