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Vent: I've been eyeballing my riser height for years and it finally bit me
Honestly, I was pouring a big gear blank last Tuesday and the cope shifted just enough to cause a nasty flash. Tbh, I always just guessed the riser height based on the pattern size. The foreman came over, pointed at the casting, and said 'That's a feeding problem, not a mold problem.' He showed me his old pocket notebook with a simple chart he's used for 30 years. Has anyone else moved from guessing to actually calculating riser size and seen a real drop in scrap?
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susan_wright347d ago
Wait, he carried that same notebook for thirty years? That's wild. I'm just picturing the pages all greasy and worn out. My guesswork has been okay, but a simple chart sounds like a game changer. I might have to ask our old timer if he's got one of those books hiding around here.
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young.nora6d ago
Ever wonder how much metal we waste just from eyeballing it? That chart probably has the right mix of height and diameter for different shapes, stuff you'd never guess right. I bet if you tracked scrap for a month after switching, the drop would be huge.
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