View Full Version : Questionable mold
soldierbilly1
05-26-2011, 01:28 AM
I just bought a used mold, and upon closing it and holding it with strong back lighting, I can see a little bit of daylight between the two halves. It's a Lyman 356402 double cavity. It seems to throw OK ... I do see a little seam on the boolits, but it does not appear to be too objectionable.
I do not see any significant stuff between the halves, yes, a little lead and organic - y looking garbage but no show stoppers that I feel would be doing this.
What gives? is the mold warped?
again, it throws nice boolits.
any suggestions from the hive? What say you?
thanks
Billy boy
NoZombies
05-26-2011, 01:41 AM
Try removing the little bit of lead and see if that helps
dragonrider
05-26-2011, 09:15 AM
Check the area around the holes for the locating pins, if you see a raised rim around the hole, carefully file it smooth. Repeated openings and closings will raise this area.
Kraschenbirn
05-26-2011, 04:14 PM
+1 on cleaning up the faces, but before you start filing or stoning on the blocks, carefully weigh and measure a few boolits from both cavities. If the weights are consistent and the boolits reasonably round, I wouldn't be too concerned about a slight gap between the halves. A goodly number of my moulds show a little daylight...mostly from "beagling"...but so long as the boolits don't show a really pronounced parting line, it doesn't seem to affect accuracy.
Bill
ilcop22
05-26-2011, 06:44 PM
I had that happen once - It was the handles causing the issue. I reseated the mould in a different pair of handles and voila - No more gap.
Buckshot
05-27-2011, 01:58 AM
.............You can scrub the block faces clean with some WD40, paint thinner, naptha, lamp oil, etc and steel wool. Or you can use a bit of 1/4" copper tubeing mashed flat on one end. That also works well to clean vent lines. If the alignment pin holes appear to be a bit peened, use a 90º chamfer reamer or centerdrill to clean up around the perimeter. Otherwise if the blocks are dropping good useable boolits, that should be all you need to do.
................Buckshot
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.