15.3.13

Aluminum Light Bulb

Taking the concrete light bulb Instructable to the next level, we decided to sand cast one in Aluminum.  The metal came from old car parts and leftovers from previous casting all chopped to fit on the band saw.

We hollowed out the light bulb just like for the concrete version, but then placed the bulb in the sand casting mix.  We poured the molten goo in and the glass broke off nicely.

Our crucible wasn't big enough to melt enough Al to cast it in one go, so we ended up with a a few lines and one break.  We're looking for something larger like a 4" pipe or we might give in and buy a proper crucible.