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Looking at the mold pictures online, I would guarantee your issue is a poorly designed mold. Looks like the hole on top of the jig head is MICRO tiny, like 1/10th the size of the sprue hole. This is going to be one of those molds where everything in your pouring has to be perfect for it to pour good most of the time. Coat the mold in frankford arsenal drop-out mold release, make sure the lead is nice and hot, and pour with the stream of lead going directly down that little tiny hole and you will have your best chance of it working.
I've had similar molds that I have purchased off of guys making their own or having a mold custom made by a shop that knows nothing about lead pouring and they have had the same exact issue. You would have to use an end mill and carefully widen that secondary sprue (the one coming out of the jig head to the main sprue) in an oblong manner to fix the issue completely, if you just used a round drill bit it would make the connection point too big and would make it so you had to sand each jig head to make the sprue connection not noticeable.
It also has the collar on only one side of the mold (to reduce production cost most likely), which is a terrible design as it doesn't let air out evenly down the middle, you'll get an incomplete pour on the jig collar because of that. And no vent from the barb on the collar, with the barb being an upward angle... so traps air and will not fill out completely. WOW
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Update:
As I said earlier I went out this afternoon and cleaned some lead in regular pot and put in the small bottom pour that I got last week.
I poured several empty pours probably 12-15 to heat up mold. Poured a few with the bottom pour and was kinda hit and miss. But once mold heated up good I started pouring the center hole with hook and swivel and bard started working out. Then just on a whim when I set up hooks and swivel I closed mold and waited extra time to heat the hook as well before pouring.
So, I don’t really know if it was the bottom pour pot or waiting for hook to heat as well. But I came out with 5 hole mold pouring 5 barbs at one time 👍.
I want to thank all that has helped me on this with their input and ideas and I’m sure there will be many more questions along the way....I’d almost bet on it. 😂😂😂
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Originally Posted by
CRAPPIE HUNTER 2008
I pour everything starting with a cold mold and force pour by pushing the mold up on the bottom pour spout. This forces the lead into the small cavities of detailed molds. Never had a problem. Cold molds are much easier to put hooks into especially when dealing with small hooks.
Nothing wrong with the ones you poured. They look good.
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Kevin could you fix the mold. I have one too and it pours crappy
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Hit the nail on the head.
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