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I finally saw a pour go wrong at the old Johnson Foundry in Toledo
We were casting a big engine block order, about 2 tons of iron. The ladle operator didn't preheat the new transfer ladle enough, and the thermal shock caused a massive breakout halfway across the floor. The foreman, Pete, yelled 'Shut it down!' and we lost the whole heat. Now some guys say we should mandate a full 30-minute preheat for ANY new ladle, no exceptions. Others think that's overkill for smaller jobs and just slows production. What's your shop's rule on this?
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paige_martin5mo ago
Our insurance guy said one breakout claim can double your rates for three years. That math changes things.
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terryr465mo ago
Forget the 30 minute rule, that's just killing time. We do a quick 5 minute torch check on new ladles for anything under a ton and it's fine. Lost heats cost way more than a little extra caution.
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