Salmonking Posted June 19, 2016 Report Share Posted June 19, 2016 (edited) Curios i have been trying to do clears transparent colors .The plastic is clear no bubbles in the pot and when I shoot it there is small bubbles in the bait I have tried all heat ranges also slow inject fast still no luck any help would be great Thanks Edited June 19, 2016 by Salmonking Quote Link to comment Share on other sites More sharing options...
majic man Posted June 19, 2016 Report Share Posted June 19, 2016 Your inducing air in the injector, what are you using to inject with? Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 Your inducing air in the injector, what are you using to inject with? Majic man I have the shooting star system. Quote Link to comment Share on other sites More sharing options...
majic man Posted June 19, 2016 Report Share Posted June 19, 2016 Sounds like your not getting a good seal on the oring. Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 Sounds like your not getting a good seal on the oring. I will try again..I am holding it tight against it. Quote Link to comment Share on other sites More sharing options...
majic man Posted June 19, 2016 Report Share Posted June 19, 2016 How does the oring look. There not real robust. Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 How does the oring look. There not real robust. I think its ok Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 You have to remember that there is air in the mold when you start. The air has to push out of the mold when you push in plastic. For feature points that trap air it can be that they aren't or can't be vented properly. In your case it is more likely turbulence causing the plastic to swirl a little when you inject. Usually you can reduce those bubbles by injecting pretty hot plastic at slow steady rate, but I see you have already tried that. I am always curious about the solutions to a problem like this. I've got a couple personal molds that seem to exhibit this problem. They are simple molds that have no other problem. They just seem to have bubles suspended in the plastic. I found holding pressure on the mold at the end of the shot for several seconds seemed to reduce the number and and size of the bubbles. This lead me to believe that it could be minute amounts of moisture air expanding in the warm plastic as it cooled. I don't have anyway to prove that, but I also noticed that sometimes these molds don't seem to have the problem at all. I'm sorry I could not give you more specific answers to your problem but I will be curious to know how you eventually solve it. Thanks Bob I have tried up to 350 .I get a few good baits but at that temp range it starts to ruin the colors Is it possible to modify the mold? Quote Link to comment Share on other sites More sharing options...
majic man Posted June 19, 2016 Report Share Posted June 19, 2016 I would shoot a different mold and see if you have the same problem. Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 I am guessing you have shot the mold itself from cold to pretty hot as well. Yes I have tried that.the colder the plastic gets the more bubbles form. Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 I didn't mean the plastic. I read that. I meant the mold. I will have to try that one..I always shoot into a warm mold. Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 Ok. I don't think a cold mold will fix the problem, but when you have tried all the obvious solutions that leaves the less obvious ideas. I was also thinking maybe a pretty hot mold. Warm enough that you have to wait a while to demold. Ok Bob I will do a hot mold ..I will heat them up on my skillet that I have to use gloves to handle it! Quote Link to comment Share on other sites More sharing options...
DaveMc1 Posted June 19, 2016 Report Share Posted June 19, 2016 (edited) I would have to ask which version of the shooting star do you have, there are more than a couple, I have had 2 of them, the original one Bear was selling (with the rotating manifold) and now the newest version from UltraMolds. Do you have the base plate with locking brackets? The only time I get bubbles in any baits is when the plastic is too cool in the pots and when the o-ring on the nozzle is about to fall apart. Edited June 19, 2016 by DaveMc1 Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 (edited) I would have to ask which version of the shooting star do you have, there are more than a couple, I have had 2 of them, the original one Bear was selling (with the rotating manifold) and now the newest version from UltraMolds. Do you have the base plate with locking brackets? The only time I get bubbles in any baits is when the plastic is too cool in the pots and when the o-ring on the nozzle is about to fall apart. Hi Dave I have the new Minnie version .works awesome Edited June 19, 2016 by Salmonking Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 19, 2016 Author Report Share Posted June 19, 2016 That makes sense. If it's drawing air right at the manifold like that it would be a stream of small bubbles. I have a Shooting Star, but since I only make baits for my own use I almost never fire it up. Hi Bob do you have any suggestions for me on how to fix this? Quote Link to comment Share on other sites More sharing options...
mark poulson Posted June 20, 2016 Report Share Posted June 20, 2016 O rings are cheap. I would change them and see if it helps, before doing anything really complicated. Quote Link to comment Share on other sites More sharing options...
rayhorse Posted June 22, 2016 Report Share Posted June 22, 2016 Hi every one. Does this happened with all your molds? How much plastic is in the pots when you shoot? 2 cups? Half or full? You can reach for the bubbles in your inyector, load you inyectors with half plastic and let them cool, tacke out the cooled plastic and look for the bubbles. The hand inyection proces is a never acurate proces, I mean, plastic temperature, inyection presure, cycle time, inyector position, mold temperature never is the same , etc, etc there are a lot of things to control. 1 Quote Link to comment Share on other sites More sharing options...
hpssports Posted June 22, 2016 Report Share Posted June 22, 2016 (edited) Also make sure to clamp the molds well. I had some molds that would suck in air if I didn't clamp both ends & middle of the mold. Edited June 22, 2016 by hpssports Quote Link to comment Share on other sites More sharing options...
majic man Posted June 23, 2016 Report Share Posted June 23, 2016 Hes also shooting salmon egg mold. Tricky by itself to begin with. 1 Quote Link to comment Share on other sites More sharing options...
Salmonking Posted June 23, 2016 Author Report Share Posted June 23, 2016 Thanks to everyone that has helped me on this thread! Quote Link to comment Share on other sites More sharing options...
