Party Popper Gun

by ssaggers, published

Party Popper Gun by ssaggers Jun 29, 2013


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Before anyone asks "Why?", my answer is this: "Just because, okay, get off my back"

Party poppers are fun, but making a firing mechanism just makes them more fun. I may make a six-shooter version next.

To load this device:

  1. take a standard party popper (http://en.wikipedia.org/wiki/Party_popper), and insert it into the barrel, thin end first. Push the Hammer all the way forward (while pulling the trigger slightly), then release the trigger so that the latch catches the hammer.

  2. push the party popper all the way into the barrel, so that the thin end protrudes, then push it back about 1cm (the gun needs a little wind up to get momentum to pull the string).

  3. loosen the string, then wrap it around the hammer, pulling it snugly through the notch to secure.

  4. pull the trigger to fire.


  1. Print all parts ( "platedgun_fixed.stl" contains all parts):
    -6 x dowels
    -4 x spacers
    -1 x fat spring retainer
    -1 x gun body
    -1 x trigger
    -1 x hammer
    -1 x handle OR 1 x handle-RIGHT & 1 x handle-LEFT

  2. sand/grind the parts as required to make the printed dowels fit into the holes provided

  3. insert the dowels into one side of the handle (as shown in the pictures).

  4. install the spacer rings, hammer, trigger, barrel, and spring retainer.

  5. Insert a spring (8mm OD * 20mm long) between the spring retainer and the hammer.

  6. it helps if you use some glue to stick the end of the spring into the spring retainer.

  7. press fit the other side of the handle. ready for fun!

EDIT: I have uploaded a slightly stronger design for the HAMMER component, as mine failed. I suggest printing this part at 80% infil with 4 perimeters and solid infil every 4 layers, to get a slightly stronger part.

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What i really think you should do is make a fully working *(except some springs and such) cap gun that works with standard cap gun caps.

This is up next on my printing list. Where do you get the spring? Would Lowes or Home Depot have them?

I'm not sure, sorry, we don't have Lowes or Home Depot here. I got it from a Champion Assortment box of assorted Compression Springs (CA 102: http://championpartsonline.com.au/index.php?route=product/product&product_id=16767http://championpartsonline.com... ), which I had laying around. since I started designing mechanical parts I've been hording springs whenever I find them. I've posted the solidworks files for the spring retainer and hammer, in case anyone feels like playing with the spring arragement (I'm tempted to make an axial spring from softened filament, so that the whole thing is 100% printed)

the spring is 8mm OD, 6.5mm ID, 40mm uncompressed length, 3.5mm pitch. unfortunately I don't have a spare to measure the stiffness on.

Thanks. I will print it out and then find something that will work

I actually found that the spring was a little too soft to work if the string on the party popper is tight when you load it, so it helps to leave some slack on the string while loading, so the hammer has some momentum when it pulls the string.

can you upload a separate file for each side of the gun? its a little large for my print bed

I've uploaded individual STLs for each side of the handle. let me know how it goes together. Mine needed only minimal post-processing (dremmel some of the edges of the dowels to get them to fit)