The Bucket Foundry

[F5 Dave]

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.

[ken seeber]

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.



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.

[husaberg]

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.



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.

[Michael Moore]

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

[OopsClunkThud]

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.

[WilDun]

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!)

[OopsClunkThud]

zipped the stl of the pouring basin, think this should work...

[WilDun]

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 .....

[husaberg]

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

[OopsClunkThud]

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

[husaberg]

it is now, I had neglected to add any information up till it was pointed out... oops

It was on your profile as well.

[Flettner]

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.

[husaberg]

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?

[speedpro]

Do you any some 4mm (16swg) LT wire?

This is Neil we're talking about

[husaberg]

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.