Thursday, February 4, 2010
Introspective Thoughts and Self Flagellation
I've thought about all of the failures that I've experienced while trying to cast the pump housing. Each one was different....sand too wet, melt too cool, core shift, sprue too close to edge causing fall out, etc. I feel that I've educated myself and the next pour will be a good one. Part of the problem was that my flask was too small and I couldn't ram the sand properly or keep the sprue holes far enough from the outside of the sand. Today I built a larger flask, re tempered my sand and, generally, got ready for tomorrow. It's supposed to rain, so it will be a good day too fire up the furnace and pour some metal.