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Thread: The Bucket Foundry

  1. #4261
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    25th March 2004 - 17:22
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    Quote Originally Posted by lodgernz View Post
    The Chinese version is made by Maikuni (NOT Mikuni) and although having "YD24" or "YD30" etc stamped on the side, they are not Yoshimura copies.
    Internally they are just another Keihin copy, though well executed.
    I bought one for its ability to operate at 45º. Made a nice alloy elliptical bellmouth to replace the plastic foul-stroke strumpet, and added a power jet to it.
    Haven't put it on a bike yet.
    Soon....
    Sweet we'll chuck on the . . . Oh, that's right. Never mind.
    I've been told. Dreaming`s free.
    Think I'll go, back to sleep.
    Everybody listen, voices in my head
    Everybody listen, do yours say, what mine says?

  2. #4262
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    22nd November 2013 - 16:32
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    Other than pistons, not too much metal splashing going on at present. In the hope of change, I made up a simple 3D printed mould to allow me to make pouring cups. The idea that I will stick these on top of a larger mould of sand or plaster ceramic mix. Smoothed up the inside of the mould with spray putty and sanding, didn’t come out too bad really.

    Click image for larger version. 

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    Prior to that I went to a mineral sand supply company and bought some foundry sand in various grades.

    Then using Coolset binder, a Foseco / Vesuvius product which is basically sodium silicate, I made a sample of each grade. Quite a difference in the surface, as is understandable.
    Years ago we tried Coolset and I was a bit disappointed, but in hindsight we used too little of the Coolset, resulting in a very weak bond of very limited shelf life. So, simply went from the original 2% up to around 4%. As Fletto pointed out, the issues might be gas generation and, as one goes finer in the sand, less passage for the gases to escape.

    Still, it’s bloody convenient: simple plastic or wood moulds/pattern/coreboxes and quick setting afer the CO2, half a minute or so.
    “The only reason for time is so that everything doesn’t happen at once”

  3. #4263
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    20th January 2010 - 14:41
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    Quote Originally Posted by ken seeber View Post
    Other than pistons, not too much metal splashing going on at present. In the hope of change, I made up a simple 3D printed mould to allow me to make pouring cups. The idea that I will stick these on top of a larger mould of sand or plaster ceramic mix. Smoothed up the inside of the mould with spray putty and sanding, didn’t come out too bad really.

    Click image for larger version. 

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ID:	343171Click image for larger version. 

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ID:	343172

    Prior to that I went to a mineral sand supply company and bought some foundry sand in various grades.

    Then using Coolset binder, a Foseco / Vesuvius product which is basically sodium silicate, I made a sample of each grade. Quite a difference in the surface, as is understandable.
    Years ago we tried Coolset and I was a bit disappointed, but in hindsight we used too little of the Coolset, resulting in a very weak bond of very limited shelf life. So, simply went from the original 2% up to around 4%. As Fletto pointed out, the issues might be gas generation and, as one goes finer in the sand, less passage for the gases to escape.

    Still, it’s bloody convenient: simple plastic or wood moulds/pattern/coreboxes and quick setting afer the CO2, half a minute or so.
    limestone is about $30 a tonne here.
    Gravel about $22.

    Looks nce.



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

  4. #4264
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    19th October 2014 - 17:49
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    Ken, you might instead consider a pouring basin that gives a smooth flow from a reservoir into the sprue to reduce oxide entrainment

    http://answer2questn.blogspot.com/20...rue-metal.html

    Campbell and others discuss those and their benefits, for example page 17 of this:

    http://user.engineering.uiowa.edu/~b...ntrainment.pdf

    cheers,
    Michael

  5. #4265
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    here's the pouring basin I made for the manifolds. Just rammed them up with green sand, happy to share the stl if anyone wants it.

    Click image for larger version. 

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  6. #4266
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    10th February 2005 - 20:25
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    Interesting stuff from all you guys,- never actually noticed that basin idea before, (would you believe?).
    but it does look good!

    ( OPT? ) -
    I would be interested in your Stl if its available!

    KEN,
    Spray putty? where do you get that? sounds interesting!
    (Guess it probably wouldn't be Bunnings this time!)
    Freedom of speech is important but if what we say is considered incorrect by our peers, they will quickly put us right.
    P.C. will eventually destroy our right to tell the truth.

  7. #4267
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    12th October 2016 - 01:24
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    zipped the stl of the pouring basin, think this should work...
    Attached Files Attached Files
    Patrick Owens
    www.OopsClunkThud.com

  8. #4268
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    Quote Originally Posted by OopsClunkThud View Post
    zipped the stl of the pouring basin, think this should work...
    Thanks OCT ........ Dunno your name, but thanks anyway - I'll scale it to suit my purposes ......... my printer is badly clogged at the moment, but when I get it unclogged .....
    Freedom of speech is important but if what we say is considered incorrect by our peers, they will quickly put us right.
    P.C. will eventually destroy our right to tell the truth.

  9. #4269
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    Quote Originally Posted by WilDun View Post
    Thanks OCT ........ Dunno your name, but thanks anyway - I'll scale it to suit my purposes ......... my printer is badly clogged at the moment, but when I get it unclogged .....
    Patrick Owens
    its on the bottom of his post



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

  10. #4270
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    Quote Originally Posted by husaberg View Post
    Patrick Owens
    its on the bottom of his post
    it is now, I had neglected to add any information up till it was pointed out... oops
    Patrick Owens
    www.OopsClunkThud.com

  11. #4271
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    Quote Originally Posted by OopsClunkThud View Post
    it is now, I had neglected to add any information up till it was pointed out... oops
    It was on your profile as well.



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

  12. #4272
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    12th March 2010 - 16:56
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    one step forward, many back.
    Seems the new foundry is a dud so far, pouring trolley is hard to operate precisely, often spilling lots of alloy on the foor, completely missing the in gate. Temp measuring tool is slow and ineffective ( perhaps it needs pre heating?) many disasters so far. Who would have thought Heath and Roberson knew what they were doing with the old one.

  13. #4273
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    Quote Originally Posted by Flettner View Post
    one step forward, many back.
    Seems the new foundry is a dud so far, pouring trolley is hard to operate precisely, often spilling lots of alloy on the foor, completely missing the in gate. Temp measuring tool is slow and ineffective ( perhaps it needs pre heating?) many disasters so far. Who would have thought Heath and Roberson knew what they were doing with the old one.
    Do you any some 4mm (16swg) LT wire?



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

  14. #4274
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    12th February 2004 - 10:29
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    Quote Originally Posted by husaberg View Post
    Do you any some 4mm (16swg) LT wire?
    This is Neil we're talking about

  15. #4275
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    Quote Originally Posted by speedpro View Post
    This is Neil we're talking about
    I got that. i am pretty sure Flet will get it also.
    Although i doubt the Aussies poms or the yanks will be familar with the 4mm 16swg LT galvanized mythical properties.
    Flet will figure it out plowing his own path

    In real life I am actually down to my last 20 meters or so.
    2.5 HT 12 SWG is pratically useless for anything other than fencing or emergency welding wire after the galv is burnt off.



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

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