Just realized my old method for checking sand moisture was way off

A guy at the regional conference in Toledo told me I was basically guessing by just squeezing a handful. He said to always use a proper moisture teller and aim for 3.5% for our green sand. I bought one the next week and my scrap rate dropped a ton. Anyone else have a tool they resisted that ended up being a game changer?

3 comments

3 Comments

ruby_murphy3mo agoMost Upvoted

Oh man, this reminds me of my buddy's shop. He was the same way, swore by the hand test for YEARS. Then his new hire, a kid fresh out of trade school, basically staged a mutiny and demanded a digital pyrometer. My friend fought it hard, called it a toy. But the kid was right, @amyr57, it's exactly like your moisture teller story. They were running everything way too hot and couldn't figure out why their finish was so bad. That one tool showed them the truth instantly. Sometimes the old way is just the stubborn way.

amyr573mo ago

Wait, you were just squeezing it by hand before? That's wild... I can't imagine running a whole line like that. The moisture teller feels like cheating, it's so much easier. My boss fought getting one for years, said it was a waste. Finally caved and we cut our rework in half, just like you said.

jenniferwells1mo ago

...and honestly, I'm still not totally convinced it's that serious. Don't get me wrong, I'm glad it worked for you and @ruby_murphy's buddy, but I've seen plenty of old timers run great castings with nothing but their hands and years of experience. The hand test is a skill, you have to develop the feel for it, just like knowing when soup is done by looking at it instead of using a thermometer. I think sometimes we rush to buy a tool because someone at a conference told us to, when really the problem might be something else entirely, like a bad binder ratio or inconsistent mulling time.