plasticpaul Posted July 17, 2009 Report Share Posted July 17, 2009 i think i made a booboo when re-heating plastic, it was a clear plastic with glitter(black glitter and super sparkle), both from bears baits and it worked the first time (only time this has happened). But when i reheated it, probably for too long 1 min ( it wasn't in a liquid form) and opened the microwave it had a slight yellow tinge to it, all the glitter seemed to clump and expand in one big black mess? i still had slightly yellow plastic in the pyrex pourer but the black stuff was a bit raised..... to help me from doing this again, what have i done wrong? is it as simple as just burning it? or are there other rules i should be applying to reheating plastic? while im putting a post up one here, why do you guys put salt in them? also any tips on pouring bigger baits? i'm pouring into a one peice mold ( both POP and resin) and mine all seem to shrink on the top and sink into the mold cavity abit, any pointers there? thanks in advance.... Quote Link to comment Share on other sites More sharing options...
tylerd1994 Posted July 17, 2009 Report Share Posted July 17, 2009 hey paul i think you way over heated your plastic...a really bad burn make sure you do not inhale that...i heard its realy bad and you question about the plastic shrinking on top....you need to over pour it a little bit becuz when plastic cures it shrinks...so just top it off a little:) Quote Link to comment Share on other sites More sharing options...
Ed Brabant Posted July 17, 2009 Report Share Posted July 17, 2009 When you reheat you need to do it in short spurts 30 seconds and stir stir stir. You also want to cut it up into small pieces when you go from a non molten state. I call them pucks. Silver flake gives me the most problem. You may also be a tad hot when you pour. The hotter the plastic the more it shrinks. Get one of the IR thermoters. Quote Link to comment Share on other sites More sharing options...
nova Posted July 17, 2009 Report Share Posted July 17, 2009 Also add a little liquid plastic to the pot before you reheat. This will help dispurse the heat. www.novalures.com Quote Link to comment Share on other sites More sharing options...
Romeo D Posted July 17, 2009 Report Share Posted July 17, 2009 As others had mentioned, it got too hot. Does not matter what plastic you use. I reheat 20-30 seconds in the microwave while it is still melted. I use a temp gun to measure the temp of my plastic and try to keep i under 350. I like to pour at 325-350. You will get the hang of it after a while and will know how much time you need to zap it for. If it has cooled and set, you need to cut it up in small pieces and melt it with some new plastic to keep it from turning yellow. I think the Presto is the best and easiest at keeping a consistent temperature, then a modified Lee pot. Micro is ok, just have to be aware of what you are doing. Quote Link to comment Share on other sites More sharing options...
plasticpaul Posted July 18, 2009 Author Report Share Posted July 18, 2009 i thought that was the problem but just wanted to double check... as for the shrinkage i have been over filling them, so much that i need heaps of trimming around the edges but it still sinks in the middle, i'll try a little cooler and try and get a thermometer and see how that goes, when you say to "top up" do you mean top it up as the plastic cures or when its still liquid? or just when i notice it drop, i trieed a laminate the other day and left it a bit long and got seams, wont it just do that? oh one other thing ive noticed is that the baits ive made still have a slight stickyness about them? as in sticky to touch, even after worm oil... any ideas? and thanks to all for your input, a great help. ill by you a beer when i see ya's Quote Link to comment Share on other sites More sharing options...
Romeo D Posted July 18, 2009 Report Share Posted July 18, 2009 Topping off, is usually meant on 2 piece molds where you fill the sprue and when the plastic shrinks, you top it off so that your bait will not have any air in them. On one piece open face molds, Usually you just fill them with a slight bulge on top without getting over the edge of you mold so that you dont have any flash and that 'bulge will shrink into the mold. If your plastic is shrinking a lot, you are working at a high temperature. The lower the temp, the less shrinkage. As for the tacky bait, are you mixing the liquid in the bottle/jug well before heating? Quote Link to comment Share on other sites More sharing options...
gone2long Posted July 18, 2009 Report Share Posted July 18, 2009 oh one other thing ive noticed is that the baits ive made still have a slight stickyness about them? as in sticky to touch, even after worm oil... any ideas? and thanks to all for your input, a great help. ill by you a beer when i see ya's You need to mix your plastic more, mix, shake and stir and when you think you got it right do it again plastisol settles to the bottom and requires aggressive mixing to re-incorporate put a few loose nuts in your bottle to help agitate. Chris Quote Link to comment Share on other sites More sharing options...
plasticpaul Posted July 19, 2009 Author Report Share Posted July 19, 2009 good idea with the bolts, will try that today.... thanks all Quote Link to comment Share on other sites More sharing options...
Lops Posted July 22, 2009 Report Share Posted July 22, 2009 I had the same problem.... I thought plastic was supposed to run between 350 and 400 I kept mine a under 400, and it came out fine the first time. then when i reheated, bpth batches I had got all clumpy.. I didnt let it get over 400 though... but they all got ruined and clumpy, and turned yellowish.. it doesnt seem like the plastic completely breaks down into a smooth pouring liquid though around 330.... am i not wiating long enough??? Id liek the help, this temperature and burning situation is a pain in the ass right now Quote Link to comment Share on other sites More sharing options...
wildtail97 Posted July 22, 2009 Report Share Posted July 22, 2009 I never get above 350, after it has been heated I keep my warming pot at 315-320 and it takes care of the problem. It takes about an hour for 6 cups of plastic to break down in a warming pot. If you use a mic, just cut it up and stir every 30 seconds. If your getting up to 400 your getting way too hot, be careful not burn! Quote Link to comment Share on other sites More sharing options...
