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Old 09-07-2010, 08:03 AM   #1 (permalink)
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Default Lead pouring issues

I purchased a new mold the other day and am having issues with the finished product coming out with holes, lead not forming all around the hook. It's a mold you cannot inject, have to hand pour. With out spending 1000's for a expensive lead spinner type lead mold, any ideas what is wrong ? Lead to hot, to cold, mold to cold. The only way I seem to get perfect mold out of it sometimes is heat the product in the mold before pouring the lead. I have poured lead for over 30 years and this mold baffles me. Any expert advise would be appriecated.
thanks in advance if you have advise
Jigs
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Old 09-07-2010, 12:58 PM   #2 (permalink)
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Default Re: Lead pouring issues

Trapped air is a venting issue or gassing issue. I know yoy know how to pour lead, maybe it's something simple; have you degassed the lead? adding a small amount of wax to the melted lead will degass it and while it's burning off you can smoke the mold cavity to aid in releasing. Pre heating the mold helps. set it on top of the lead pot for a few minutes.
Those are the basics. Venting is a little harder without getting flash on the finished jig. Try placing a penny size dot of aluminum foil opposite side of the mold hinge, this will keep the mold open about .005. If that solves the problem, machine a .005 deep vent at the hook sut off area.
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Old 09-07-2010, 02:43 PM   #3 (permalink)
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Default Re: Lead pouring issues

Jigs;
I had these same problems when i started using larger hooks in molds that require much smaller hooks.

First off, your lead should be heated to it`s highest setting.

# 1, After lead has melted, heat for 20 minutes longer before pouring.

# 2, Lay your mold on top of pot to heat evenly on both sides.

# 3, Make sure that the Spur hole is big enough, sometimes you need to enlarge hole, Do this as the last thing done. You can always just use a knife to smooth up any bigger spur after you pour.

# 4, When you use lead, it is best to use the highest quality you can find.
Especially for very small items. like (Darter Jigs & Shakey Jigs)

# 5, Now you are ready to pour, everything is set up and ready to pour.
Lay all your parts out, so you can pour in a timely manner.

# 6, This could be the most important message in all that I have said.
Heat your hook eye up.

This is how i do it, if I am using really large heavy hooks?
I use a heat source, (Torch) same as used when powder painting.
I use the heated lead just as much, Just dip hook eye in hot lead for 5 seconds, then tap hook on side of lead pot, this will clean hook eye of any slag.

Sorry for the winded history. But I can promise you this will solve all your problems with pouring lead.

Also if you are having problems with getting those lead products out of your molds.

Just light a candle, use it to blacken the inside of mold before starting your pouring. Sometimes you will have to do this a few times. Your pouring will only improve after just a few times doing this.
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Old 09-07-2010, 07:32 PM   #4 (permalink)
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Default Re: Lead pouring issues

Thanks guys,
The torch heating did the trick, because I only use smallest 5/0 mustad hooks. The was was a good idea melting in the lead pot also, just don't take a deep breath ! Holy smokes !
Thanks again
back to the bait pouring, new Spinnerbait head coming out soon.........Myself and Limit Lures are using the same head, so I thought it best to change again. Hopefully Jigs Snakebite Baits head?
Jigs
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Old 09-07-2010, 09:46 PM   #5 (permalink)
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Default Re: Lead pouring issues

[b]I thought "lead" was banned in California


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Old 09-07-2010, 10:52 PM   #6 (permalink)
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Default Re: Lead pouring issues

Leads only banned in ca. if your a democrat
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Old 09-07-2010, 11:10 PM   #7 (permalink)
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Default Re: Lead pouring issues

Quote:
Originally Posted by jiggin4bass
Leads only banned in ca. if your a democrat
No, only if your a plumber ?
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Old 09-07-2010, 11:27 PM   #8 (permalink)
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Default Re: Lead pouring issues

If you want a real easy way to cast lead heat the mold up with a torch or laying mold on top of your rcbs pro melting pot. There is two products you can use to make pouring lead very easy.The first is CLEAN CAST LEAD FLUXING COMPOUND when added to melting lead it will aid in removal of sand dirt sludge,oxidation it will result in better casting. Second method is CASTING RELEASE SPRAY GRAPHITE COATING it help and even pour and easy release of lead from your molds. But what do i know ive only been pouring lead for 33 years now.

P.S. I use both products
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Old 09-08-2010, 12:40 AM   #9 (permalink)
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Default Re: Lead pouring issues

Both products are from www.midwayusa.com
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Old 09-08-2010, 03:29 AM   #10 (permalink)
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Default Re: Lead pouring issues

Another good thing to do it light a candle and hold the mold close so that you get the black soot to build in and around the cavities ....this helps the lead flow smoothly ..
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