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Warning: My old trick for cleaning out a clogged riser tube actually saved the day yesterday.
We were pouring a big batch of aluminum brackets and the riser on mold #7 just wouldn't fill right. I figured the tube was clogged with old sand, which usually means a full stop to chip it out. Instead of grabbing a rod, I took the oxy-acetylene torch and gave the outside of the tube a real quick, light heat pass for maybe 10 seconds. The expansion broke the sand plug loose instantly and we finished the pour with zero defects. Has anyone else tried a thermal shock trick like this on stubborn sand clogs, or is there a better way you use?
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dylanh8114h ago
Man, that feeling when a weird old trick actually works is the best. Saved you a ton of time.
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sandra_black12h ago
Totally get that feeling, @dylanh81... my grandpa's fix for a squeaky door still works better than anything from the hardware store.
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