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I finally got a stubborn sand mold to release clean every time
We kept getting broken castings on a small gear pattern, and the sand was sticking in the teeth. My foreman in Toledo said to try a 50/50 mix of talc and isopropyl alcohol as a parting dust, sprayed lightly. I brushed it on with an old paintbrush last Tuesday, let it dry for a minute, and rammed up. The mold came apart perfect, no tearing. Has anyone found a better mix for really fine detail work?
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nora_webb512d ago
Know that struggle all too well.
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emma_jones2d ago
Nice trick! We had a similar fight with some resin patterns. Ended up using just straight graphite powder shaken in a sock, which worked okay but was messy. Your mix sounds way cleaner for small stuff.
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