Saugerman Posted September 26, 2010 Report Share Posted September 26, 2010 I made a divided cup using flashing and jb weld, and it worked fine for about 4 heat ups, before it sparked just as the timer was going off on the microwave. I have looked it over for a more shinny spot,and can not find where it sparked. Should there be a black place on the metal? Is there something more I should look for? I really worked the metal over with still wool and vinegar and thought I had a good job.Any help will be greatly appreciated. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
toadfrog Posted September 26, 2010 Report Share Posted September 26, 2010 I made a divided cup using flashing and jb weld, and it worked fine for about 4 heat ups, before it sparked just as the timer was going off on the microwave. I have looked it over for a more shinny spot,and can not find where it sparked. Should there be a black place on the metal? Is there something more I should look for? I really worked the metal over with still wool and vinegar and thought I had a good job.Any help will be greatly appreciated. Thanks in advance. Pard never use anything impregnated with any metals of any kind to nuke your plastics in . The spark that is created can result in a flash fire. And if you ever get burning plastic on you its not easy to put out. High temp silicone will adhere to glass. It will withstand heat up to 500 degrees and a little more. Nuff said I guess. Quote Link to comment Share on other sites More sharing options...
Saugerman Posted September 27, 2010 Author Report Share Posted September 27, 2010 Pard never use anything impregnated with any metals of any kind to nuke your plastics in . The spark that is created can result in a flash fire. And if you ever get burning plastic on you its not easy to put out. High temp silicone will adhere to glass. It will withstand heat up to 500 degrees and a little more. Nuff said I guess. I have heard from several of you that you mostly just do reheats, in the microwave,and for only 20 to 30 seconds at a time.I was under the impression that once you dulled the metal that you could use the divided cup safely for original heat ups. Thanks for the personal messages,they have helped me alot. Quote Link to comment Share on other sites More sharing options...
Jig Man Posted September 28, 2010 Report Share Posted September 28, 2010 My first divided cup didn't last very long in the micro. It broke on a reheat. The one I have now, I warm up on a hot plate and only use for pouring. I heat the plastisol in 2 cups in the micro. Quote Link to comment Share on other sites More sharing options...
nova Posted September 28, 2010 Report Share Posted September 28, 2010 My first divided cup didn't last very long in the micro. It broke on a reheat. The one I have now, I warm up on a hot plate and only use for pouring. I heat the plastisol in 2 cups in the micro. I've had one for a couple of years. Used it thousands of times with no problems at all. www.novalures.com Quote Link to comment Share on other sites More sharing options...
GB GONE Posted September 28, 2010 Report Share Posted September 28, 2010 Many times they spark on the edge of the metal. Look for a spot between the metal and the JB Weld. Could be on the side or even the bottom of the piece of metal. The shiny part of metal and also sharp points of metal can act as antennaes for the "microwaves" bouncing around inside and will arc possibly. Eliminate shiny and pointy, and you have no worries. I have had a couple that lasted a good long time but eventually they seemed to spark off of pointed areas. Last one I had sparked on the edge of my metal so I sprayed the outside of my cup with high heat spray paint omly where the metal and the JB Weld join on the cup. Blocked any/all shiny parts. That cup has lasted over 6 months now and I use it 20+ times a night, almost every night of the week. Jim Quote Link to comment Share on other sites More sharing options...
GB GONE Posted September 28, 2010 Report Share Posted September 28, 2010 High temp silicone will adhere to glass. It will withstand heat up to 500 degrees and a little more. RTV (silicone) is really the answer here. You can either make your divider from rtv or dip your metal divider in the rtv for protection. Foolproof.... Jim Quote Link to comment Share on other sites More sharing options...
Saugerman Posted September 29, 2010 Author Report Share Posted September 29, 2010 RTV (silicone) is really the answer here. You can either make your divider from rtv or dip your metal divider in the rtv for protection. Foolproof.... Jim Since my first post on this subject,I made 2 more cups,I made one with flashing material, that I soaked in vinegar and rubbed with still wool to dull. And the second with lexan and glued it in with high temperature rtv. I no that the one with lexan will probably warp eventually.Even if it does it will be very easy to remove,and I should be able to reuse the cup. So far so good. Thanks for the advice on this,I value all of your advice,as most of you have been doing this for some time. Quote Link to comment Share on other sites More sharing options...
