Twinjector Disaster

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Originally Posted by snake River

pretty fancy clamps but they sure look good.

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:hesaidCF

I have not done a twin injection. However, I did run across this a similar problem with a bass worm mold that I was injecting, The problem I actually figured out was over clamping. I was actually closing down the small vents which were designed to let the air escape so the plastic was finding a lesser path of resistance. I actually had to file the vent grooves slightly. The problem went away.

Did you get your twinjector sorted?

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Originally Posted by gmintimidator

Did you get your twinjector sorted?

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Have not tried it yet. I have been making a lot of 2" twister tails as of late and have not had to have the twinjector. Will post an upsate when I do use it again. Snake River give me a couple tips on that and I will try them out.CF

Cool. Post if you have any issues. I've done a bunch of reading on the forum and there's a lot of good information, so its nice to return the favor and help out others.

I'm new at this twin injector and soft plastic injection.

Two clamps to use a set of welding clamps the ones with pads looks like vise grips with c clamp on the end. The other is a carpenters vise lowe and Harbor Freight has them for 20.00 mount it on bench. i have bought all kind of clamps and these are the best and don't rough your molds up. I don't heat my molds but i heat my injector and blending block after u get plastic to 350F let it drop to 300f then inject i would melt some scrap and use it till i got it down pat. I have a pancake grill i set my injector on to heat it the hot plate maybe getting it too hot in spots and melting your orings i set my grill on about 200f to warm my injector. Draw into injector slow and push into molds slow and steady. Cub48

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Originally Posted by snake River

I noticed that you are using plastic clamps throw them in the garbage put your molds in a regular vice or clamped them with the steel vice or put them back together with the screws that come with it and give it a shot plastic clamps do not hold your molds tight is they should be I know because I've got about four pairs of them that I don't use also for people starting out I do not recommend the clamps of made out of plastic that they are selling on most of the mold sites is I've had the same problem time after time though I know were going to hear about it here probably some a guy say they never had a problem but I do not recommend using plastic clamps and I bet you $1 million what I told you it will work.

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I agree with Bob. I am a vise user also. I stopped using plastic clamps and screws on my molds just because I do better with the screw type vise. This is what I use.

Attachment 273716

Ship the carpenters vice i use is tall enough that it clamps more in the middle. i have 2 of them yesterday i clamped 4 molds and may of been able to do 5. My vise has two 1/2"rods on the bottom the molds stack up don't have to hold them. Also u can bolt a wood board on it if u want i don't but that is something if u liked. Like i said i have tried almost everything as for as clamps i have c clamps they scar my molds works good clamping. I have the vise grip bar type in all size started with the small ones then bought the larger ones the bar is in the way and if u don't squeeze it hard it would blow out. I have even saw some use the spring clamps these were out of the question. I have tried regular vise getting the molds lined up was a problem The vise grip welding pliers the ones with the pads on them work great i used them before i bought the carpenters
vise they are about 6 bucks at HF. If i find a picture of the vise i will post it. Cub48

Ok here is a picture if i can get it to post!!!