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Need to create a form to mold a gun body

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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Need to create a form to mold a gun body

Unread postAuthor: JDP12 » Sat Dec 24, 2011 11:21 pm

Hey all- I'm planning on using some of this stuff- www.mcmaster.com part #8644K18 to create a gun body as then I can just cast it and don't worry about having to router areas out for the gun itself..

However in order to create this gun body i need a frame consisting of a big base piece of wood, and then an outline of some sort of material about 2 inches high that the urethane will go in.. (I'm assuming this all makes sense).

However, I don't wanna use some sort of stiff plastic for the outline as cutting little pieces and creating angles will be annoying as crap. Does anyone know of a flexible plastic I can get, around 2" wide that can bend, and stay in the shape you bend it to?
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Unread postAuthor: jakethebeast » Sun Dec 25, 2011 5:18 am

Kydex, heat it first, then you can just mold it as you want, and when it cools, its stiffens again
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Unread postAuthor: jhalek90 » Sun Dec 25, 2011 2:51 pm

I would take a good look at using cardboard.

might sound hard to work with.... but if this is a one time mold, you should be able to use a combo of cardboard and a good strong tape to make it easily.

another option, is foam board, from a craft store, it is about 1/4'' thick and has a VERY slick surface on both sides made from some sort of plastic.

With a little patience, the foam board can be bent easily.

With either material, draw your outline on the wood, and place some 4'' nails outside of the outline every 2 or 3 inches, and at every bend.

Then simply tape your material to the nails, and the wood.

Hope this makes sense.
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