2marshall8 Posted November 10, 2020 Report Share Posted November 10, 2020 Anyone know why I had some of my dual injection blends right on and others bled over? I've tried 350, 330, 320 degrees and tried to match the 2 blends of plastic as close as possible within 5-10 degrees when shooting at those temps, but haven't found a super consistent dual laminate. I think the bass won't care since nature has all kinds of imperfections in how baitfish look but people will. thanks. Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 10, 2020 Report Share Posted November 10, 2020 Multi cavity mold? If so, can you show it to us or provide a link to it? Quote Link to comment Share on other sites More sharing options...
toadfrog Posted November 10, 2020 Report Share Posted November 10, 2020 Try this, take the tips out of your injector. Place the ends on a flat surface and push down until you gently make contact. Then loosen the set screws that control the plunger depth. push down hold pressure while you tighten the screws back. Put tips back in. This will help to insure the injector is putting out equal amounts on both sides. Providing your hand pressure is steady and equal. Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 10, 2020 Author Report Share Posted November 10, 2020 12 hours ago, Apdriver said: Multi cavity mold? If so, can you show it to us or provide a link to it? https://baitmold.com/plastic-bait-mold/soft-plastic-bait/aluminum-mold-v23-5-cavity-2-8-inch-70-mm-separate/ 11 hours ago, toadfrog said: Try this, take the tips out of your injector. Place the ends on a flat surface and push down until you gently make contact. Then loosen the set screws that control the plunger depth. push down hold pressure while you tighten the screws back. Put tips back in. This will help to insure the injector is putting out equal amounts on both sides. Providing your hand pressure is steady and equal. good idea. I'll try this later today. I own the bass tackle dual injector, and when I do shoot I have one hand stabilizing the blending block and one hand applying pressure to the dual injector. do you normally use 2 hands to push down on the injector handles? that might be another idea I'll try. Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 10, 2020 Report Share Posted November 10, 2020 (edited) This mold should laminate. Very critical to get the viscosity of the two colors close. Usually we do this by having the temps close but depending on additives they can affect viscosity. You can eyeball it by pulling out your stirrer and letting some plastic drizzle back in cup. Not very scientific but works. The other thing I can suggest is slow your injection speed down. With the ribs, a really fast injection speed may tend to swirl those colors. If I’m having trouble with this, I’ll take my temps down too. 320 is as hot as I ever shoot and sometimes I’ll go below 300 if I’m having trouble with a laminate. 280 I start having other difficulties like freezing. Edited November 10, 2020 by Apdriver Added content 1 Quote Link to comment Share on other sites More sharing options...
hpssports Posted November 11, 2020 Report Share Posted November 11, 2020 Also try to inject slow & steady. 1 Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 11, 2020 Author Report Share Posted November 11, 2020 k lots of good advice on this one. I will say I inject fast and hard, so I'll change the speed, this is another important variable I forgot to test. The other injector alignment suggestion is something I can check. Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 11, 2020 Report Share Posted November 11, 2020 Let us know if you get this ironed out. After looking at the mold closely, there may be something else if these suggestions don’t straighten out your issue. 1 Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 12, 2020 Author Report Share Posted November 12, 2020 So lowering the temps to 320 made a difference and I also slowed how fast I push down on the injectors. I also verified that the plungers were aligned. All these suggestions helped. thanks 1 Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 26, 2020 Author Report Share Posted November 26, 2020 On 11/11/2020 at 6:36 AM, Apdriver said: Let us know if you get this ironed out. After looking at the mold closely, there may be something else if these suggestions don’t straighten out your issue. what was that "something" else? I'm still not getting perfect double laminates to the standard I want to see them. Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 26, 2020 Report Share Posted November 26, 2020 After looking at the mold, I believe the way the runner is cut is probably causing you some issues. In fluid dynamics, if you want laminar flow you shouldn’t put obstacles in the way of the fluid. That’s exactly what the designer did when he cut the runner on this mold. 1 Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 26, 2020 Report Share Posted November 26, 2020 Right where the red circle is he put a large obstruction to the flow of the plastisol coming out of your nozzle and then this cavity down stream that has to be filled before the plastic flows through the gate. If it was mine, I would grind that out, polish it as best as I could and see if that helps. I don’t think you will have any issues if you could successfully remove that......whatever that is....... Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 26, 2020 Report Share Posted November 26, 2020 You may be able to remove it by clamping the two halves together and drilling it in a drill press. I have enlarged a runner successfully using this method. 1 Quote Link to comment Share on other sites More sharing options...
mark poulson Posted November 26, 2020 Report Share Posted November 26, 2020 4 minutes ago, Apdriver said: You may be able to remove it by clamping the two halves together and drilling it in a drill press. I have enlarged a runner successfully using this method. Me, too. Quote Link to comment Share on other sites More sharing options...
Les Young Posted November 26, 2020 Report Share Posted November 26, 2020 What mold is this? Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 26, 2020 Report Share Posted November 26, 2020 Linked above, Les. 4th post from top. Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 27, 2020 Author Report Share Posted November 27, 2020 (edited) First off thanks everyone for just your awesome support and help in helping me find the root cause for this issue, this is amazing advice that y’all gave me. Take a look at the attached picture and you’ll see this recent shoot I did actually was very well distributed between the top and the bottom colors where the runners are located, it’s not until you get towards the last inch of the bait near the tail section that you see the colors blend. I shot these around 326°. Do you still feel that all you said applies or should I be shooting at a lower temp? Edited November 27, 2020 by 2marshall8 Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 27, 2020 Report Share Posted November 27, 2020 It looks like you have good separation except with one cavity. The other four look good. Before you move any metal, exhaust all other possibilities of solution. Yes, reduce your temps. You may have shot the one cavity faster than the others. Only you with the mold and hot plastic knows your process. Sometimes to work out a problematic mold, it takes a lot of trial and error. Explore them all and just looking at your runners, just lower your temps and shoot slow. Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 27, 2020 Author Report Share Posted November 27, 2020 (edited) Something makes me think that I do need to lower the temp to thicken the viscosity, that way when the two plastics hit they can’t meld as much together. I’ll keep trying things . So since I been shooting at 325-335 should I get down into the 310’s ? When u are troubleshooting how wide do u usually jump in temperature tests ? Edited November 27, 2020 by 2marshall8 Quote Link to comment Share on other sites More sharing options...
Apdriver Posted November 27, 2020 Report Share Posted November 27, 2020 Ten degrees at a time. Like I said before, 290 and below you start to run into other issues. Quote Link to comment Share on other sites More sharing options...
Les Young Posted November 27, 2020 Report Share Posted November 27, 2020 12 hours ago, Apdriver said: Linked above, Les. 4th post from top. I can't believe i didn't see this. Thanks buddy. Quote Link to comment Share on other sites More sharing options...
2marshall8 Posted November 29, 2020 Author Report Share Posted November 29, 2020 I found that around 310-320 is the ideal temp for when I've been shooting these dual laminates to avoid bleeding. thanks for all the advice on here. 1 Quote Link to comment Share on other sites More sharing options...
