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The way we handle green sand molding is stuck in the past
For a decade, I was taught to ram molds by feel and sound, a method passed down from my old foreman in Toledo. We'd pack it until it 'rang right' when tapped. About two years back, a new guy from a bigger shop showed me his digital rammer with a pressure gauge. I thought it was overkill, but after trying it on a tricky gear housing pattern, the difference was clear. My old method left soft spots that caused fins and scrap. Now, I aim for 80 psi on the gauge every single time, and my scrap rate on those jobs dropped by half. It's not about replacing skill, it's about giving it a real number to work with. Who else has moved from the 'tap test' to something more exact?
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eva_garcia565mo ago
That drop in scrap is huge. @fiona332, when you do the quick tap check, how often does it actually match up with what a gauge would tell you? I'm curious if the old way is still reliable or just a habit.
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