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lube on piston molds

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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lube on piston molds

Unread postAuthor: Sticky_Tape » Thu Jul 17, 2008 2:08 pm

I need to know what typr of lube you can use on piston molds for a plunger on my pump I tried to use wd40 on a small piece of 1/2 copper and poured in the epoxy the epoxy will not come out it seemed like it wouldn't work.
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Unread postAuthor: blind909 » Thu Jul 17, 2008 2:15 pm

try petroleum jelly.
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Unread postAuthor: Sticky_Tape » Thu Jul 17, 2008 2:33 pm

Ok I have vasaline which is white patrroleum jelly but the olny question is will it desolve with epoxy?
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Last edited by Sticky_Tape on Thu Jul 17, 2008 2:43 pm, edited 1 time in total.
You can tell how awesome a cannon is by the pressure used.
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Unread postAuthor: blind909 » Thu Jul 17, 2008 2:40 pm

Nope, ive done it before, theres that, or cooking spray
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Unread postAuthor: Sticky_Tape » Thu Jul 17, 2008 2:44 pm

k thanks
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Unread postAuthor: kablooie » Thu Jul 17, 2008 2:53 pm

I've had the same thing happen to me, and I've found that if you use some vice grips or pliers and squeeze the copper (assuming it is pretty short) so it deforms slightly into an oval-ish shape, after a few squeezes the piston should loosen up. Also I use vaseline for my molds.
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Unread postAuthor: Sticky_Tape » Thu Jul 17, 2008 5:27 pm

That's more assuring thanks!
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 18, 2008 12:56 am

Last piston I cast I used ordinary butter :)
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Unread postAuthor: Killjoy » Fri Jul 18, 2008 1:02 am

I've been working at a kid's camp this week teaching and making carbon fiber Ipod cases with the kid's and I've been using olive oil as a lube and it worked perfectly.
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Unread postAuthor: psycix » Fri Jul 18, 2008 2:03 pm

Carbon fiber? You can do better things with that then just ipod cases!
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Unread postAuthor: Killjoy » Sat Jul 19, 2008 2:56 am

Very, Very true; but the camp was all about Ipod Mods, so my boss and I chose to make cases out of carbon fiber cause it seemed cool.
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Unread postAuthor: daxspudder » Sat Jul 19, 2008 4:15 am

Killjoy wrote:Very, Very true; but the camp was all about Ipod Mods, so my boss and I chose to make cases out of carbon fiber cause it seemed cool.


A camp just for Ipod mods???? The fourth question mark says it all, I thought camp was for outdoor type of stuff, or band, or cheerleading, or football, Ipod modding? wtf, almost as dumb as buying water IMO.
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Unread postAuthor: Killjoy » Sat Jul 19, 2008 4:25 pm

^^It's a kid's science and building camp, so chill.

And last time I checked this is the same camp where I'm teaching a class of thirty kid's on building piston valve pneumatic cannons, so remember that before you call anything we do here dumb.

And considering the kids' also built amps and solar powered Ipod chargers from scratch during this camp (and I'm talking about 11 year olds doing this kind of stuff), I think they got a little more out of it then outdoor or cheerleading camp.
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Unread postAuthor: VH_man » Sat Jul 19, 2008 4:45 pm

yea, BTW sillicone lube does not work for moulding pistons.

it dissolves into the epoxy, weakening it and making kind of hard to remove.

stick with cooking spray or vaseline.
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