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Big block of pvc

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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Unread postAuthor: spudtyrrant » Thu Nov 05, 2009 5:23 pm

metalmeltr wrote:I never have been much for simple and even if it does cost a lot of money it will be unique
and more cumbersome, and less efficient , and slower to operate ,and uglier than a hat full of a$$holes (imo)....the list goes on lol
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Unread postAuthor: metalmeltr » Fri Nov 06, 2009 1:19 pm

even if you guys don't like it i will build it if i can
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Unread postAuthor: john bunsenburner » Fri Nov 06, 2009 1:37 pm

Haha, for that last comment I like you...hehe, and for your name.

Anyway i agree, if you got a piece of plastic sheeting 1/2" thick you could use a hack saw(or better) and a heat gun to make your block. Or use a thermoplastic and a mold.

Alternatively, if this is possible, use metal instead i would think you may be able to get a block for less than if made of PVC or do as your name says and fire up your foundry :D.


Check dumpsters and ask for left over plastic sheeting, you may just be able to make it for free... :D

Good luck any way. My current design involves a block too, just is like 2 by 2"(its actual 40x40mm) and solid alli. I think i may have to re make parts of it though...

Ok happy spudding!
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Unread postAuthor: metalmeltr » Fri Nov 06, 2009 2:58 pm

Thanks for the positivity. Actually I called myself metalmeltr because when i first started joining internet mesage boards i was first learning to weld.
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Unread postAuthor: metalmeltr » Sat Nov 07, 2009 5:26 am

I where to laminate thin pieces of pvc to create a large block would it be better to solvent weld or epoxy the pieces together?
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Unread postAuthor: jmadden91 » Sat Nov 07, 2009 5:42 am

Why not just use wood?
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Unread postAuthor: rikukiakuchiki777 » Sat Nov 07, 2009 5:54 am

Do you necessarily need a block of PVC to do this? You could set up something similar to this that is simpler and more aesthetically pleasing. Get some pipe that can sleeve your barrel nicely, cut two 10cm long sections of this pipe, glue each one on to the corresponding end of the split barrel and then glue a gasket onto one end and attach a hinge/latch. Its the exact same thing, but using pipe instead of a block. You wont have to machine it or do any work to it. Simple as that :)
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Unread postAuthor: metalmeltr » Sat Nov 07, 2009 6:01 am

I plan to use a rather wide hinge and latch for strength so it would't work so well on a round pipe. I don;t want to use wook because I know that solvent welding PVC to PVC will make a strong joint. Since wood is a disimilar material I would have to use epoxy of some sort.
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Unread postAuthor: rikukiakuchiki777 » Sat Nov 07, 2009 6:05 am

Whats wrong with epoxy?

Edit: Also you don't really need a wide hinge. The barrel will only experience a force exerted by the pressure for a fraction of a second. Any hinge will do I think.
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Unread postAuthor: metalmeltr » Sat Nov 07, 2009 7:20 am

Nothing that I know of I just feel better with the proper glue bonding what it is designed to.
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Unread postAuthor: john bunsenburner » Sat Nov 07, 2009 8:16 am

I agree, solvent weld, but perhaps avoid purple primer, find the see through stuff.
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Unread postAuthor: metalmeltr » Sat Nov 07, 2009 8:41 am

john bunsenburner wrote:I agree, solvent weld, but perhaps avoid purple primer, find the see through stuff.

Any idea where I can find this stuff? This is not the stuff labled cleaner is it?
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Unread postAuthor: john bunsenburner » Sat Nov 07, 2009 12:39 pm

Google clear pvc primer. Also you can use a heat gun and some other kind of plastic instead of PVC
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