rsinyard Posted December 20, 2008 Report Share Posted December 20, 2008 I got a 2 piece diamond tail worm mold from del and when I pour the mold I think I am getting air pockets in the rings. When I take the worm out, the rings will not be completely round. 3/4 of the ring will be round then the other 1/4 will be flat. Some of these indentions are even lined up across several rings. Any ideas of how to solve this? I am also having this issue on the 2 piece paddletail mold I have. I am pouring my plastic at 350 degrees. Quote Link to comment Share on other sites More sharing options...
Delw Posted December 20, 2008 Report Share Posted December 20, 2008 2 things will cause this, if your plastic is not hot enough( yeah yeah I know 350 Quote Link to comment Share on other sites More sharing options...
rsinyard Posted December 20, 2008 Author Report Share Posted December 20, 2008 I am using M-F plastic without any softner or hardner. When I pour, it is thinner than pancake syrup almost like water. I don't think it is pouring to fast either because I barely pour because of the small hole. I am trying to pour down the center of the mold. I haven't tried tilting it to one side. The molds are cold when I start pouring and are warm to the tough by the time I am done. Should they be hot to the touch? Tomorrow I will take my heat gun and heat the molds and try pouring. The only things I am adding to the plastic is color, glitter and scent. I guess another question would be on the presto pot. If I turn it up to 400 will it burn the plastic? Quote Link to comment Share on other sites More sharing options...
Basseducer Posted December 20, 2008 Report Share Posted December 20, 2008 rsinyard, If you are going by the temp dial on the presto pot your plastic is somewhat coller than the setting on the dial. I got a lazer thermometer from harbour freight and adjust the dial to the readings on the thermometer.Hope this helps. Quote Link to comment Share on other sites More sharing options...
bear21211 Posted December 20, 2008 Report Share Posted December 20, 2008 Rsyniard I had the same problem with the 2 piece 6' Diamond Tail and the 4" Diamond Tail. I pour with a pot and I was getting exactly what you described. I was not getting my stream right down the center of the mold. I thought that I was but I was not. Now when I pour them I make sure I am exactly centered over the hole with a small stream and now I am getting a great product.I know you probably think you are down the center just as I was but next time you pour double check to make sure you are over center. I think this will correct your problem for the most part. Quote Link to comment Share on other sites More sharing options...
rsinyard Posted December 21, 2008 Author Report Share Posted December 21, 2008 Thanks guys for all the replies. Here is what I tried today. I heated the mold with my heat gun until I had to handle it with gloves. I tilted it to one side and poured very slow. The rings filled completely but not I have a straight line from top to bottom. I could call this the hook line and market it as a feature. Quote Link to comment Share on other sites More sharing options...
ekimtu Posted December 21, 2008 Report Share Posted December 21, 2008 delw is right heat the mold , make sure the plastic is hot and thin , and pour on the side . i have a diamond and a 6" v-tail mold from del-mart and they work great!! Quote Link to comment Share on other sites More sharing options...
rsinyard Posted December 21, 2008 Author Report Share Posted December 21, 2008 delw is right heat the mold , make sure the plastic is hot and thin , and pour on the side . i have a diamond and a 6" v-tail mold from del-mart and they work great!! Do you tilt your molds and let the plastic run in the opening or are you trying to pour it down the center? I tried letting the plastic run down the sprue and into the hole and it works fine except for a line that runs all the way down the worm where the plastic runs in. Quote Link to comment Share on other sites More sharing options...
Delw Posted December 21, 2008 Report Share Posted December 21, 2008 Do you tilt your molds and let the plastic run in the opening or are you trying to pour it down the center? I tried letting the plastic run down the sprue and into the hole and it works fine except for a line that runs all the way down the worm where the plastic runs in. can you post a pic of that line? Something tells me your mold is very cold when your pouring, and that line is plastic just cooling off fast. where are you pouring and how cold is it. Molds should be at room temp when you pour so should your supplies when you get ready too cook them. Quote Link to comment Share on other sites More sharing options...
rsinyard Posted December 22, 2008 Author Report Share Posted December 22, 2008 I will try to take a pic of them if I can. Heating the molds cured the problem with the rings not filling in. Now the only problem I am having is the line running along the worm. Quote Link to comment Share on other sites More sharing options...
HJS Posted December 22, 2008 Report Share Posted December 22, 2008 I'm a great fan of pre-heating my PoP molds, especially so when pouring during the winter months. We heat entirely with a woodstove... which translates to a COOOOLD house... and coooold molds. (It was 7F this morning... outside I mean). I like my PoP molds to be almost too hot to hold with bare hands, otherwise my molds will plug at narrow spots. And I use 3-4 heavy, plastic, spring-loaded shop clamps to hold the two halves together tightly while pouring. The long lateral line might not be a pouring problem, maybe it is a mold problem. Sounds like the mold seam between the 2 sides is not quite flush with each other and therefore leaves a detectable mold line. Guess I shoulda ask first if the long line is right where the seam is between the two mold halves... is it??? Quote Link to comment Share on other sites More sharing options...
Delw Posted December 22, 2008 Report Share Posted December 22, 2008 The long lateral line might not be a pouring problem, maybe it is a mold problem. Sounds like the mold seam between the 2 sides is not quite flush with each other and therefore leaves a detectable mold line. Guess I shoulda ask first if the long line is right where the seam is between the two mold halves... is it??? I been thinking the same thing thats why I was wanting a picture. The mold could have some junk on the faces keeping it from closing, or it could have been dropped and has a kicked edge. Quote Link to comment Share on other sites More sharing options...
