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Mold won't clear up (Read 2318 times)

gnoahhh Oldtimer Offline Posts: 829 Location: Gaithersburg, MD Joined: Mar 31^st, 2010	Re: Mold won't clear up Reply #15 - May 14^th, 2024 at 12:34pm	Print Post
	To keep the thread on track, when in VN how did you pre-heat your mold and melt lead to make bullets for the M1 Carbines you swapped for? In a canteen cup over a fire of old ration containers?


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frnkeore Frequent Elocutionist Offline Posts: 7323 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Mold won't clear up Reply #16 - May 14^th, 2024 at 2:21pm	Print Post
	bpjack wrote on May 14^th, 2024 at 11:14am: We could actually buy cartons of cigarettes the PX or the small commissary my second year most of the time. The only time we had to smoke the ones from C Rations is when they did a money swap. Those rations were so old the crackers were totally stale. Cartons were $1.70 (compared to over $9 stateside) and you could trade a carton of menthols for an M1 carbine. Jack, they were over charging you!! When I was there a carton was $1.10 Maybe inflation? I was there in '66/'67.

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bpjack Frequent Elocutionist Offline Posts: 2839 Location: East Olympia, WA Joined: May 18^th, 2008	Re: Mold won't clear up Reply #17 - May 14^th, 2024 at 2:28pm	Print Post
	C4 makes a great heat source. Just cut a claymore mine apart and you will have plenty. Fall 69-to fall 71, Frank. I guess inflation was rampant.

	ASSRA # 11318 just a bit of a hoot.
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jfeldman ASSRA Board Member Offline Posts: 1083 Location: Imperial Beach, Ca Joined: Nov 5^th, 2005	Re: Mold won't clear up Reply #18 - May 14^th, 2024 at 8:28pm	Print Post
	What I think I know about my Aluminum NOE mold: The sprue plate, being steel basically regulates the mold temp. My alloy needs to be at about 850 and as one of our oldtimers on here recommends, it should take 4 to 5 seconds for the sprue to harden when you leave a good sized puddle on the sprue plate. Anyway, it seems to work for me. Regards, Joe


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11512 Location: Why, out West of course Joined: May 29^th, 2006	Re: Mold won't clear up Reply #19 - May 14^th, 2024 at 10:33pm	Print Post
	Just about every new mold I buy I have to vent. Modern machinery is so good and the tolerances are so tight air will not escape as the lead is poured into the mold. I cast at 775-800 Vent your mold.
	« Last Edit: May 14^th, 2024 at 10:43pm by westerner »
	A blind squirrel runs into a tree every once in a while.
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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Mold won't clear up Reply #20 - May 15^th, 2024 at 12:48am	Print Post
	marlinguy wrote on May 12^th, 2024 at 7:51pm: I just use acetone to clean inside molds. Brakleen, in the big spray can. Close the sprue plate, crack the mold open 1/16" inch or so. Stick the straw in the hole and blast! Wear safety glasses. I've never needed to vent any NOE or Accurate molds. But with aluminum you have to keep your rhythm going and the sprue plate hot. Charlie Dell once wrote about spilling some hot lead over the plate as you detach the spout, and I've been doing it ever since.

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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11512 Location: Why, out West of course Joined: May 29^th, 2006	Re: Mold won't clear up Reply #21 - May 15^th, 2024 at 4:31am	Print Post
	Here is the best way to vent a mold. Use a fine mill file. I vent all NOE and Accurate molds this way as they have needed it the most. I vented a Barnett mold a couple months ago and what a huge difference it made. Ron Long taught me this in the 1980s.

	A blind squirrel runs into a tree every once in a while.
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nuclearcricket Oldtimer Offline Posts: 758 Joined: Oct 15^th, 2008	Re: Mold won't clear up Reply #22 - May 18^th, 2024 at 8:14am	Print Post
	When coating the inside of an aluminum or any mold for that matter you DO NOT want to use a candle, that will leave an oily/waxy film in your mold and you don't want that. The best thing I have found to coat the inside of a mold with smoke is a grill lighter, it keeps the heat away from your fingers and you can more easily manipulate the flame around the inside of the cavity. What that carbon coating does is slightly slow down the cooling process. Thus it helps to get rid of the wrinkles and such. If you are casting good looking bullets other than the wrinkles, up your heat a bit till you get things looking the way you want them to. Sam


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gnoahhh Oldtimer Offline Posts: 829 Location: Gaithersburg, MD Joined: Mar 31^st, 2010	Re: Mold won't clear up Reply #23 - May 18^th, 2024 at 10:13am	Print Post
	nuclearcricket wrote on May 18^th, 2024 at 8:14am: When coating the inside of an aluminum or any mold for that matter you DO NOT want to use a candle, that will leave an oily/waxy film in your mold and you don't want that. The best thing I have found to coat the inside of a mold with smoke is a grill lighter, it keeps the heat away from your fingers and you can more easily manipulate the flame around the inside of the cavity. What that carbon coating does is slightly slow down the cooling process. Thus it helps to get rid of the wrinkles and such. If you are casting good looking bullets other than the wrinkles, up your heat a bit till you get things looking the way you want them to. Sam That's been my gut feeling, and is why I utilize a Bic lighter.


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