The Shop > Metal Stuff

A bit of casting

<< < (4/12) > >>

Rob.Wilson:
Don't  tell anyone cos its a secret ,Wes  :lol: :lol: :lol: :lol:

 a flammable liquid , i use brake/carb cleaner ,,, something light that burn easy ,, graphite powder ,, you have to keep giving it a shake as the graphite settles out and a  bit treacle/molasses .   the brake cleaner carries the graphite powder so it can be spayed and when set a fire the molasses is baked on  sticking the graphite to the surface . Also the burning off of the brake cleaner skin dries the mould .

Just something i came up with a bit trial and error  :smart: works well for me ,,,, Great on cast iron ,, gives the casting a nice black finish

Rob    

Edit ,, forgot to say i use one of those pump up sprayer to apply it with .

Powder Keg:
Thanks Rob :wave: I'll have to give it a try. do you bake your Cores with Molasses also? I have some Sodium Silicate to try out. Just need more time :smart:

Rob.Wilson:
I do Wes  :thumbup:

This is the mix i use


10 parts silica sand  ,,,,,DRY

5 parts  moulding sand ,,,,,DRY

1 part  core binder ,,,, which is a type of corn starch i think

Mix above dry

Temper with molasses water  or core oil (linseed oil ) 

Core oil dose give a better core , but stinks when baking .

Rob

Artie:
his sound about right?

..... mixture 50/50% zircon flour and graphite stirred into either alcohol.......

 :smart:

Dean W:
It sure is gonna be pretty on the next pour, Rob.   :beer:
Your posts are a real pleasure, always!  It's good for me to see a persistent fellow at work, too.   :clap:
Inspirational, and all that, seeing how much work goes into each of these pours, and you just seem
to make light of it when you have a little (or big) catastrophe.  You just keep at it like you're killin' snakes! 

Now, is that "B" for Bogs, or for Bandit?   :scratch: 

 :)

Dean

Navigation

[0] Message Index

[#] Next page

[*] Previous page