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Back in '98 at the old Midland Steel foundry, we had a core break in the mold just before the pour.
The shift lead, a guy named Frank, saw it and yelled to hold the ladle while we scrambled to patch the cavity with backup sand and a prayer. We got it sealed up, but I still wonder if anyone has a better fix for a last-minute core failure like that.
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the_holly5mo ago
Heard some guys swear by a quick-setting ceramic patch for that exact problem.
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richard2265mo ago
My buddy at the machine shop uses that stuff on worn lathe ways. It sets up in twenty minutes and holds a crazy tight tolerance. Saved him a ton on a full remanufacture.
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laura_allen5mo ago
We had a core shift on a big gear mold once. Grabbed some of that high-temp furnace cement from maintenance, the stuff in a caulk tube. Packed it in fast and let it cure for ten minutes with a tiger torch on it. Pour went fine and the casting cleaned up okay. It's messy but it buys you time when the sand fails.
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