December 31, 2012

Homemade Progress

Last post, I showed a preview of the homemade blaster I was creating. I thought I'd post some 3D pictures here to more clearly show what will be going on.
I've omitted the spring, catch, etc. There are just the basic parts - enough to show how it's going to work.
  • PVC sheath that fits perfectly around 1 1/4" PVC
  • 1 1/4" PVC plunger tube
  • PVC bushing cut/made to mate with the plunger tube. A wye shoved into the bushing should help alleviate any dead space concerns.
  • Plunger made mostly of thinwall PVC, with a skirt seal at the front. The spring goes inside the plunger.

At rest, the spring will push all parts to the front of the blaster. The blaster will be primed by physically pulling the plunger tube back, and the rear of the plunger will catch the trigger.

 The PT is then pushed forward again to finish the priming motion; it will mate with the front bushing to provide an air seal.
In case anyone is interested, I'm using Tinkercad, a free online 3D drawing tool. It's certainly not the same as AutoCAD or other software that can be printed out/fed into a machine for making parts, but it's good for showing what you're doing!


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