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Posted: 8/13/2012 10:43:12 PM EDT
| I know this might have been covered but how are they pulled with air? Ive googled and searched couldnt find anything definative |
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I believe that the term "air pulled bullets" are bullets demilled with equipment that uses air pressure to operate a mechanism similiar to our hand impact bullet pullers. The bullets are removed without anything touching or gripping the bullets which can leave marks on the bullets. Air pulled just means they use air pressure to operate the device which is similiar to a jackhammer or impact chisel and not air pressure to blow the bullet from the case. Haven't seen any such equipment in operation. Check out this post. Scroll down to Sticks post:
http://www.m4carbine.net/archive/index.php/t-106488.html You can still have crimp marks in the bullet or swipe marks from the bullet sliding out of the case neck but no marks from collets or fingers that grip and pull on the bullets and possibly making them out of round. |
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I asked the same question in a post a few weeks ago. I can't find the post now so I can't quote the answer.
Dryflash3 explained it simply as a rubber suction cup fits over the tip of the bullet, suction is applied, like a vacuum, and the machine pulls the bullet out. no marks. |
| That makes more sense I found a guy who said it was putting ammo in a sealed container applying presssure to the whole thing the pressure who leak into the case and then you decompress the outside and everything flies apart. I actually rigged this up at work I got everything to come apart with 250lbs of nitrogen could easily set this up to do say 250 500 bullets at a time with reasonably little cost. |
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Quoted:
That makes more sense I found a guy who said it was putting ammo in a sealed container applying presssure to the whole thing the pressure who leak into the case and then you decompress the outside and everything flies apart. I actually rigged this up at work I got everything to come apart with 250lbs of nitrogen could easily set this up to do say 250 500 bullets at a time with reasonably little cost. 250 PSI? Yikes - that's a lot of pressure to be messing with large tanks. I was thinking the other direction - pull a vacuum on the case and the existing pressure inside would pop out the bullet. Posted Via AR15.Com Mobile |
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Quoted: That makes more sense I found a guy who said it was putting ammo in a sealed container applying presssure to the whole thing the pressure who leak into the case and then you decompress the outside and everything flies apart. I actually rigged this up at work I got everything to come apart with 250lbs of nitrogen could easily set this up to do say 250 500 bullets at a time with reasonably little cost. that does sounds cool, How long did you pressure the load? |
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Quoted: I asked the same question in a post a few weeks ago. I can't find the post now so I can't quote the answer. Dryflash3 explained it simply as a rubber suction cup fits over the tip of the bullet, suction is applied, like a vacuum, and the machine pulls the bullet out. no marks. That had to be someone else, wasn't me. |
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I'm pretty sure it was you.
It was in my thread about the SS 109 pulls and how they looked so good, just a line of dots as pull marks. Someone asked about that part being in the case, how could the machine grab it. I made a feeble attempt to explain and you cleared that up. Remember the baseball pitching machine analogy ? I asked if you knew how air pulled works cuz I sure didn't. |
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I would love to get to the bottom of this one halfway through my box of air pulled ss109 just ordered some air pulled m193...
I tried to look in to it some but all i came up with was more threads with basically just guesses ranging from an air actuated kinetic puller to a suction device that pulls them out to a pressurizing a chamber and or then pulling a vacuum on it. |
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Quoted:
Quoted:
That makes more sense I found a guy who said it was putting ammo in a sealed container applying presssure to the whole thing the pressure who leak into the case and then you decompress the outside and everything flies apart. I actually rigged this up at work I got everything to come apart with 250lbs of nitrogen could easily set this up to do say 250 500 bullets at a time with reasonably little cost. 250 PSI? Yikes - that's a lot of pressure to be messing with large tanks. I was thinking the other direction - pull a vacuum on the case and the existing pressure inside would pop out the bullet. Posted Via AR15.Com Mobile I rigged this up with big steel fittings and a butterfly valve with a catch trap on the end just to prove a concept. I left the pressure on for about 30 to 40 minutes it leaked into the case and when I opened the valve the bullets popped out. I saw some damage to the bullets but made no attempt and softening the blow in the trap but I dont think it would take much effort. |
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Quoted:
Quoted:
I asked the same question in a post a few weeks ago. I can't find the post now so I can't quote the answer. Dryflash3 explained it simply as a rubber suction cup fits over the tip of the bullet, suction is applied, like a vacuum, and the machine pulls the bullet out. no marks. That had to be someone else, wasn't me. It was me and I said it was a guess. |
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Quoted:
I put the loaded bullets in a chamber of just fitting laying around the shop and then I used a nitrogen tank with a regulator Don't get me wrong - for small scale experimentation those pressures are no big deal. But on a larger scale - like enough to do a lot of cartridges at once - those are actually pretty high pressures. Well into ASME unfired pressure vessel territory. Still has a lot of potential; just don't want to give people the idea that just welding up a big box is a good idea. Posted Via AR15.Com Mobile |
There's no trusting you now.
| You can rule out vacuum. It is not possible to draw more than about 24 pounds per square inch of vacuum and a bullet tip don't have many square inches to hold on to. I agree with ThorCW. If there is money to be made one such device could do a lot of "pull down" in a shift. |
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