How to get it off? Tried brass brush, no joy, tried scraping w/pocket knife, no joy, tried heating with torch and hitting w/brass brush, no joy. How do it?
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How to get it off? Tried brass brush, no joy, tried scraping w/pocket knife, no joy, tried heating with torch and hitting w/brass brush, no joy. How do it?
Attachment 220744
Id try heating the blocks by putting them in the melt for a maybe 5 minutes. Handles attached of course, and not submerged, but just rest the blocks on the top of the pot so the bottom of the blocks are in the melt so they'll become "over heated". Whenever I do that, I always like to rubber band the handles so they dont open and make it worse or fall in or something. Then I do whatever and come back, Open the blocks, keep them spread with my thumb and you can do some serious scrubbing with a cloth, OR, lots of times I use a stick (similar to a popcycle stick).
Soak with Hoppies number 9 bore cleaning solvent. At least 8 hours, 24 is better.
Then try this razor blade to lift it. Dont damage the mold.
Wow thats a big spot. Is it possible the mold is warped a bit?
I like to heat on hot plate then use a bamboo skewer with a sharp point to see if I can lift one edge somewhere on a vent line. Did this happen when you were casting or did you get the mold in this shape ?
Not a lead smear,but a repair to a blowhole in the iron with nickle rod.....I can see typical bubbles/slag pockets in the weld.
Good eye there john.k Saw the bubbles or slag pockets but it didn't register. Kudos my friend! That explains why the pocket knife didn't release the offender. Now does it affect casting or not ?
Best thing I do is heat up the mold to casting temp on a hot plate.
Rub with the edge of a cold ingot and it will come off.
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When the mold is hot, I spray Ballistol on it and scrub with a bronze brush. Works for me. it also is lubes the mold.
Interesting. New to me. I did notice the bubbles.Quote:
a repair to a blowhole in the iron with nickle rod.
I use a 3/4" wood chisel. Has never failed.
If it is a lead smear, I heat up the mold to temp and then scrape the spot with the sharp edge of a boolit base. Comes right off.
Wow. I'm kinda shocked how many people suggested taking a metal implement to the mold. I would never do that for fear of ruining it. Guess I'm just a chicken.
Kraken Fan #69
Never seen anything like that. What would cause the need for a repair like that?