I’ve been having a problem with my castings, in that little flakes
seem to be coming off the mold, and causing pits in the castings.
I think I figured out what was happening.
Because I’m working by myself, and have never actually seen anyone
else cast, I’ve had to figure most stuff out on my own. I’ve been
taking the mold out of the oven, and putting it in my casting machine,
then melting the metal.
Previously, my poor propane torch was barely able to bring any metal
up to casting temperature.
What I figure is happening is that heat from the torch is hitting the
mold, causing some differential heating, flaking, and blowing the
pieces into the mold.
After the two or so minutes it takes to melt the metal, a fair number
of flakes have gotten into the mold.
I’ve read that you’re supposed to get the metal ready for casting,
then put the mold into the machine. I’m not sure how I can do this
well without four arms, two keeping the torch on the metal, and two
loading the mold.
Anyone have any advice about how I should approach this?