Skimpy Posted November 10, 2015 Report Share Posted November 10, 2015 I am going to attempt to make a jig mold using the Durams putty. Any helpful pointers? Also, what do you suggest I coat the mold with? Thanks guys. Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 10, 2015 Report Share Posted November 10, 2015 For lead? Or plastic?? Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 Making a mold for lead. I heard it can be done Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 10, 2015 Report Share Posted November 10, 2015 i havnt tried it, so i cant say yay or nay... but silicone is a sure shot however, im interested to find out......! first issue is weather or not plaster can take the heat... id make a simple slab with a small hole in it, fill the hole with hot lead and see how it reacts... warping wont be an issue, but cracking might if all is well there, then youre on a hunt for a sealer that can take the heat.... there was talk a while back about high temp floor wax for sealing plaster.. that might be worth a shot..... also worth trying, high temp spray paint, like the kind for bbq grills Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 Ok so silicone works best ? How long does it last ? Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 10, 2015 Report Share Posted November 10, 2015 ive only poured plastic in my silicone molds.. some are a year n a half old and still in good shape Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 i want to pour lead. just trying to get an idea on whats best to use to make a mold for lead Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 10, 2015 Report Share Posted November 10, 2015 (edited) Silicone would be best.. Ive heard of guys doing it with bondo, but since bondo is a resin, warping is an issue.... And since plaster is held together with water, evaporation from the heat could lead to cracking over time.......... I was just hoping you would try it for me Edited November 10, 2015 by JRammit Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 Lol oh I'm still gonna try it !!!!!!!!! 1 Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 10, 2015 Report Share Posted November 10, 2015 Lol oh I'm still gonna try it !!!!!!!!! Awesome! Keep me posted!... Ive made quite a few DWP molds and prefer it over pop any day! (except for the price).... But im new to pouring lead... If yours works, ill have to try it too... I have a new bait in mind that i havnt had the courage to try making yet, cause its lead Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 Will do. Quote Link to comment Share on other sites More sharing options...
rustedhook Posted November 10, 2015 Report Share Posted November 10, 2015 I have made molds with water putty and it works pretty well. One word of advice though. Make sure it is 100% cured(dry) before you pour or it will spew lead like mine did. Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 Rustedhook, what did you use to seal it ??? Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted November 10, 2015 Report Share Posted November 10, 2015 There is a high temperature RTV that suits the purpose I believe. I have only used a bondo type material. It worked well, but it does soften after a few pours. This is not necessarily a huge disadvantage. If the mold halves are backed with plywood, you could carry on pouring. Alternatively, make lots of molds and cycle to allow cooling time. I haven't tried plaster, but the temperature will have a reaction with the contact surface and cause it to crumble, so the life of the mold will be relatively short. Which ever method or material you use, if you plan on thousands of pours, then you need to have a way of making more molds. Aluminium is the only mold material that is going to give long life. Dave Quote Link to comment Share on other sites More sharing options...
rustedhook Posted November 10, 2015 Report Share Posted November 10, 2015 Believe it or not, I sealed with Elmer's carpenter glue. 50/50 mix of water and glue. Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 Believe it or not, I sealed with Elmer's carpenter glue. 50/50 mix of water and glue. wow really !!!!! Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 10, 2015 Author Report Share Posted November 10, 2015 There is a high temperature RTV that suits the purpose I believe. I have only used a bondo type material. It worked well, but it does soften after a few pours. This is not necessarily a huge disadvantage. If the mold halves are backed with plywood, you could carry on pouring. Alternatively, make lots of molds and cycle to allow cooling time. I haven't tried plaster, but the temperature will have a reaction with the contact surface and cause it to crumble, so the life of the mold will be relatively short. Which ever method or material you use, if you plan on thousands of pours, then you need to have a way of making more molds. Aluminium is the only mold material that is going to give long life. Dave I Dont plan on making 1000's but will def make a few of the molds to cycle. Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 10, 2015 Report Share Posted November 10, 2015 Believe it or not, I sealed with Elmer's carpenter glue. 50/50 mix of water and glue. guess that could work.. since most of it soaks in the plaster...... did you add any glue to the plaster mixture itself??...... just a thought, since the glue would not evaporate like the water Quote Link to comment Share on other sites More sharing options...
rustedhook Posted November 10, 2015 Report Share Posted November 10, 2015 No, didn't add it to the plaster mix. Didn't know if that would have interfered with the cure. Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted November 11, 2015 Report Share Posted November 11, 2015 I add about 10% wood glue to the water, it does not affect the cure. I'm not sure if it strengthens the plaster any, the mold still breaks when you drop it. I just think the plaster feels a little less dusty. You still need to seal as the plaster is still porous. Dave Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 11, 2015 Author Report Share Posted November 11, 2015 Ok prob a stupid question, but you said plaster. That's POP right ? Or are you still talking about Durams wood putty ? Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted November 11, 2015 Report Share Posted November 11, 2015 Yes, any reference made to plaster is about plaster of Paris. Regular plaster is no good (I just tried it). Dave Quote Link to comment Share on other sites More sharing options...
JRammit Posted November 11, 2015 Report Share Posted November 11, 2015 Ive refered to DWP (durhams water puddy) as plaster many times before... Not to cause confusion, but they are both quite similar Main differences are: DWP mixes thicker and has more working time in its "thick state" before hardening.. And is a bit stronger once cured Pop is cheaper, easier to find and less prone to bubbles.... But for me, it mixes too thin, then turns from "milk" to "rock" in seconds 1 Quote Link to comment Share on other sites More sharing options...
Skimpy Posted November 11, 2015 Author Report Share Posted November 11, 2015 Lol ok thanks !!! I planned on using DWP Quote Link to comment Share on other sites More sharing options...
wootonc Posted November 11, 2015 Report Share Posted November 11, 2015 I ve had Lurecraft.com make me a bunch of molds they seem to work pretty well with the high temp silicone cost around 70 each most of the time. I am going to try to start making them myself though. Quote Link to comment Share on other sites More sharing options...
