Todays Project - What did you do today?

[awemawson]

(03-22-2014, 11:04 AM)dallen Wrote:

(03-22-2014, 05:14 AM)awemawson Wrote:

(03-21-2014, 08:06 AM)dallen Wrote: home mixed oil bonded sand, and a two part mold. Oil bonded sand is hard to work with when its cold so the first one that I poured was a little rough around the edges, the second was a lot better pour but I lost the bearing in the back of the vac motor I use for a burner blower so melt was really fun with a half a crucible full of half melted aluminum when the blower gave up the blue smoke.

Is it your own recipe and can you share it ?

same recipe that everyone else uses far as I know , petrobond powder and used motor oil with a splash of Methanol throwed in to catalyze the oil, all mixed up with some silica sand.
Stuff is a bear to work with when its cold, but when its a hundred degrees here I don't have to worry about molds drying out faster then I can ram em up.

DA

Thanks Dave.

I think Petrobond is much more common your side of the pond than here. I can buy petrobond bonded sands relatively easily but at a huge price of about £1 per kg plus about the same for carriage, but the petrobond powder doesn't seem to be available here to make your own. Unfortunately this makes petrobond a very expensive option.