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hot glue piston

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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hot glue piston

Unread postAuthor: super spuder » Fri May 04, 2007 7:55 pm

I am still working on my piston gun. I have tried everything wood to hockey pucks, but i just cant get a seal. So i am going to make a hot glue piston. It is going to be 3 by 3. So i went and got some 3 inch pipe tonight, but before i start putting hot glue in the pipe, i was wondering if there is anything that you can spray/put on the pipe to make the piston slide out when i am done with out making the hot glue all holly?
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trying to decide on a new project, probably something small.
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Unread postAuthor: integral » Fri May 04, 2007 8:00 pm

Silicone spray works a treat. But any fine lubricant that does not degrade polymers (ie solvents) will do.
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Unread postAuthor: super spuder » Fri May 04, 2007 8:05 pm

Is WD40 a solevent?
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Unread postAuthor: Fnord » Fri May 04, 2007 8:39 pm

Well, I think wd40 has kerosene and oil in it, but it shouldnt dissolve pvc. If you are paranoid use pam.
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Unread postAuthor: super spuder » Fri May 04, 2007 8:51 pm

ok. i think i will use pam
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Unread postAuthor: Pyro Ninja » Fri May 04, 2007 10:37 pm

you can just use spray cooking oil....worked for me :D
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Unread postAuthor: super spuder » Fri May 04, 2007 11:07 pm

i already used pam :D
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Unread postAuthor: Boomer_ » Sat May 05, 2007 2:08 am

If you feel like it, and your piston is serviceable, find the nearest hobby shop that sells R/C car parts. Ask them for some 50 to 80 weight shock oil. That is your best bet. I think it should be around 3-4 dollars a bottle.
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