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Pouring stocks

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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Pouring stocks

Unread postAuthor: john bunsenburner » Mon Nov 24, 2008 4:08 pm

I would like to make a new stock i will get my self an old gun from a flee market to mold it from. I was wondering what i could make my stock from i have a few ideas and i would like to know if people have anything to add or any more advice. My ideas are as follow:

1. making my stock from aluminium
2.epoxy
3.plastic made from startch, glycerin and water(search making patato plastic on google)
4. A plastic made from graphite and sulphur
5. styrofoam dissolved in aceton and pour into the mold to dry

which of the above is the cheepest, sturdiest, lightest and easyest to make? Any ideas to add of advice would be appriciated. Oh and the starch plastic will be covered in a water proof film, i will see what works best incase i decide to use it. And another thing, any ideas of how to make a mold? i was thinking of green sand or clay, any more ideas?
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Unread postAuthor: jackssmirkingrevenge » Mon Nov 24, 2008 4:39 pm

I could go for resin/glassfibre (or carbon if you can afford it ;) ) over a foam core - strong, lightweight and damn sexy to boot.
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Unread postAuthor: Sticky_Tape » Mon Nov 24, 2008 6:12 pm

Wow jsr I think that is going to be the new thing. I would like more info on the ''5. styrofoam dissolved in aceton and pour into the mold to dry'' department it could be good for spudguns.
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You can tell how awesome a cannon is by the pressure used.
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xnt rnm ne z ahtbg
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Unread postAuthor: potatoflinger » Mon Nov 24, 2008 6:21 pm

I would say do the styrofoam dissolved in acetone, but then coat the styrofoam with some epoxy.
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Unread postAuthor: starman » Mon Nov 24, 2008 6:51 pm

Could always fashion it from wood...it's cheap, strong, easy to work with, saw, sand down and finish...and looks great.
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Unread postAuthor: SEAKING9006 » Mon Nov 24, 2008 7:02 pm

Mold it out of bondo. But use high-strength bondo, or if using something else, try anything that doesn't say '5 minutes' on the bottle.
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Unread postAuthor: jitup » Mon Nov 24, 2008 7:04 pm

I would do some what what Jsr said, first I would by a big chunk of foam, carve it to the shape you want, take fiber glass sheets and resign (like what they use for car repairs) cover it with a couple of layers, sand smooth briefly, paint and BAM!!! you have a 100% home made stock.

note if you choose this method I would cut the fiber glass sheet into strips about 1 inch wide, this will make it a lot easier to work with. :D 8) :idea:
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Unread postAuthor: john bunsenburner » Tue Nov 25, 2008 2:08 am

how expensive are all you methods? Here i one saw epoxy glue for 100$ for like 10ml!!!!
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 25, 2008 2:19 am

john bunsenburner wrote:how expensive are all you methods? Here i one saw epoxy glue for 100$ for like 10ml!!!!


Have a look around

There are online tutorialstoo.
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Unread postAuthor: i-will » Tue Nov 25, 2008 2:37 am

i'm a pretty frugal guy so i'd go a different route. i'd cut the shape outta Styrofoam. then instead of using fibers and resins for layering i'd use paper and watered down Elmer's glue. it sounds kinda stupid but it works so good that i've made a lot off crap this way. the best paper to use is computer paper. it's clean and white and looks great when it drys. and no matter what type u use u can always sand it smooth and paint it (drill, saw, hammer, etc just like wood). also the thicker u layer it the longer it takes to dry. i recommend that u go 10 layers at a time and give them 24hours to dry. 10 is probably all u need for a stock anyways. but if u wanted to pistol whip random people then go with a minimum of 20 to make it a lot stronger (and make it really hurt). the result is a stock that feels like wood but lighter. and even when u tap or smack it, it sounds like wood. don't knock it till u try it.
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WHY PAY FOR IT WHEN U CAN MAKE IT?
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Unread postAuthor: john bunsenburner » Tue Nov 25, 2008 10:50 am

No offence, but i prefer cooler stuff than paper machè but i like the idea of the foam core, i heard it was very dangrous to work with glass/carbon fiber though...Oh and what mold could i use? Oh what about my ideas are they all bad or is there any useable ones included, and how much should i pay for 1 liter of resin, about...
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Unread postAuthor: i-will » Tue Nov 25, 2008 3:36 pm

if i had money i would go with the fiber and resin wrap. it can be polished. i like a good shine.
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WHY PAY FOR IT WHEN U CAN MAKE IT?
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 25, 2008 4:13 pm

You can mix techniques and use paper and epoxy resin ;) don't be put off by seemingly high prices for resin, you pay a lot because you're getting a large quantity, and that will last you a long time and lots of projects ;)
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Unread postAuthor: john bunsenburner » Tue Nov 25, 2008 4:14 pm

Ok please supply more details...
if i had money i would go with the fiber and resin wrap
Now what the hell is resin wrap, what does money mean and fiber could be atkeast 500different things(thst is if i take fly fishing rods as one thing and not divide it into brands), so PLEASE give more detail. There is carbon fiber that costs over 1k per two meters(about 6feet) and i doubt that is right. Answer my question about the mold please and maybe give me some supplyers in my continent(europe, I can get stuff from all the contries here especially poland and switzerland). Thank you and im waiting for lots of comments and advice!
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 25, 2008 4:20 pm

The important thing is the epoxy resin, what you use as a layering material isn't too critical. If you're coating a foam blank, you won't need a mould either.

One technique used in model aircraft is to "dress" a nylon stocking over the foam and then paint the resin over it. You'd have to do this with several layers to get a strong enough shell, but it works well. The only problem is having to enter a female undergarments establishment and purchase the requisite tights :roll: :D
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