Tiderunner Posted December 3, 2023 Report Share Posted December 3, 2023 As I stated in an earlier post, I had ordered a FGF 6oz dual injector. Came yesterday, and like any little kid would do I couldn't wait to rip the box open. Went down to the workbench. Chose two different color plugs, and remelted them. Used the FGF 3.75 rip shad mold, had a few old tails already made, so tossed them into the mold , then shot the first run. It was a disaster! None shot! OK so the injector was cold from being outside ( told you I was in a hurry to play ), so I let hot plastic stay in the injector, and watmed it nicely. The main issue with not shooting was when the plastic hit the cold nozzle, it formed a sort of condom over the nozzles, and nothing could get out. Second run, reheated plastic, still had the condom thing going on, but shot the molds without problems, but used a lot of pressure to shoot the mold. I pretty much put all of my 230 lbs into injecting. After opening the tubes, some plastic, a good amount actually was still liquid, so I know temps weren't an issue. How do I keep the condom from from forming? What temps are y'all shooting plastic with using a dual injector. I was just under 320. As an aside I love the quality of the dual injector. Even my son the engineer was impressed. Especially, With the autographed cylinders! I thought that was pretty cool too. Help me out here guys. I can't be sitting on the handles just to get the plastic to inject through the condom. Quote Link to comment Share on other sites More sharing options...
Dink Master Posted December 3, 2023 Report Share Posted December 3, 2023 320* is good. I live in Southern California, I always warm up my Injector & Blending Block before shooting. The Blending Block needs to be hot. Also lube the Injector/O-rings with worm oil or Pam spray. 1 Quote Link to comment Share on other sites More sharing options...
Apdriver Posted December 3, 2023 Report Share Posted December 3, 2023 Heating the blending block is essential. I also warm my injectors. 1 Quote Link to comment Share on other sites More sharing options...
Tiderunner Posted December 4, 2023 Author Report Share Posted December 4, 2023 Yeah. I guess I was just a little impatient. With winter setting in here in New England, I actually throw my molds and injector into the oven for a few minutes. I think the major culprit might be the blending block. It's thick and heavy so it probably takes a little longer to heat it up. I always lube my Orings before I start. I use either worm oil or WD 40. Reminds me...I'm running low on worm oil. I've got an entire winter ahead of me to figure out the learning curve of the dual injector. Thanks gang for the comebacks. 1 Quote Link to comment Share on other sites More sharing options...
Apdriver Posted December 4, 2023 Report Share Posted December 4, 2023 I’m impatient too. I heat my injectors and block up with a propane torch. Just keep it moving and while your plastic heats you can warm these up. Some times I use a griddle on HI. 1 Quote Link to comment Share on other sites More sharing options...
