I made a graphite mold with 1/32" em slots but getting the metal into the pockets has turned out problematic. I'm considering milling a cover plate with journals to transmit the aluminum to one end of a word while venting at the other end. The pockets are script words, so there will be multiple paths for the metal to follow.
How much height of pressure from my crucible would be enough to force the aluminum through to the vents or should I consider some other form of pressure?
At present, am considering a stainless enclosure that reroutes the flame from around the sides of the graphite plate, back inward above it to a center graphite "drilled" crucible mounted to the top plate.
I'm using discarded EDM graphite and I have one that's about 8 inches long that I could drill out for a crucible but if that's not enough height for this situation, it'd be a lot of time wasted.
Any thoughts or alternate ideas?