Wednesday, July 28, 2021

BULB CASTING

We were finally given the go-ahead to cast our lead bulbs. I scrapped out an old boat for our lead. We had our “mock bulb” pressed into a sand mixture, making a proper mold. We then borrowed an old furnace, and within several hours, had poured molten lead into 4 bulb molds. I had been worried for sometime about this job, but it went so easily, I was speechless. The next day we broke open the molds, cut off the risers (pour holes), and started cleaning up the bulbs. Currently they are 77kg, BUT they need to be drilled, bolt heads counter sunk, trimmed, and faired. THEN, I will bring the weight down to 72kg (the max allowed).

Bulb mold

Glueing the top on

Cold furnace

Preparing to pour

Almost finished lead bulb


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