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Warning: My old method for checking core sand moisture was way off
An inspector from the Cleveland plant told me my 'hand squeeze' test was letting through sand that was still at 4% moisture, which explains the gas holes we kept seeing. I switched to using a proper Speedy moisture tester for every batch now. Anyone else have a simple tool that saved them from a recurring defect?
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hollym122mo ago
That Speedy tester is a lifesaver for sure. I remember we had a similar issue with green sand, not core sand, but the idea is the same. Our old shop used the "ball test" where you squeeze it in your hand. We thought a good ball that held its shape was around 3% moisture. Brought in a proper tester and found out we were off by over a full percent sometimes. It's crazy how much your hand can miss, especially with different sand mixes. Switching to a real tool for every batch was the only thing that fixed our consistency problems.
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oliver2422mo ago
A buddy of mine ran into that exact hand-test problem, @hollym12. His crew was getting bad shakes until they finally bought a proper moisture meter. The difference in their castings was night and day once they had real numbers to work with.
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