3D Printed Water Shooter - TinkerCAD/3D Printing

It's been hot.. Like really hot.. Like oof.

So I thought I'd make something fun to help cool things down!

I'll be showing you how to make a 3D printed water shooter - I won't be going into detail on design (here's the TinkerCAD project in case anyone does want to know how it was put together though) - it works similarly to those pool noodle water sprayer thingies only this is obviously printed - it's almost like a huge syringe!

I'd suggest it's best for childish adults like myself or for not too tiny kids to use under supervision as it's hard plastic and I'd hate for anyone to get hurt!

• 3D Printer
• Filament - PETG holds water best and is less likely to warp in the sub too!
  • I used Filamentive clear PETG

• Glue
  • I used hard plastic glue because I happened to have some but find superglue is usually fine for these projects
• TinkerCAD - If you want to change the design

I've popped the 3 stls you'll need below - you'll want 1 each of parts A and B, 1 cap and 2 handles :)

When slicing

I don't give out gcode or settings - this is because it can actually be dangerous and damage your machine due to materials and printers varying so much but here's some general guidance for printing these models:

• I recommend using PETG and at least 4 walls/perimeters and top/bottom layers to ensure it's watertight.
• I'd stick to 20% or more infill but bear in mind it'll be stronger but also heavier the higher the infill percentage is so if you're printing for kids, don't push this too high
• You will need supports for Part A only
  • I tried to minimise the amount of supports needed for ease of printing so all other pieces should print fine without supports/rafts/brims etc.
  • As you can see from the timelapse, (because I was a bit too excited to print my new toy) I forgot my supports - it still came out very much useable however I wouldn't suggest repeating my mistake there!
• We're not doing anything too taxing for the machine here so your usual settings should be fine

Once you've got everything sliced, go ahead and print!

You may notice in the timelapse that one of my handles failed and came away from the bed - this was just because I hadn't cleaned the bed thoroughly enough so do make sure your print bed is clean and level before printing, just in case :)

Before assembling, I strongly recommend a little clean up!

The tolerances are quite tight to ensure all the water doesn't just come spilling back out when you fill it so any blobs or strings want removing where possible.

Mine came out pretty smooth so I just quickly ran a file around the inside of Part A and briefly sandpapered everything else just to be sure it would all work smoothly once assembled.

Assembly - There are pictures of each step above because this stuff always sounds a little more complex than it is so check those out if the written instructions aren't making a whole lot of sense :)

1. Take parts A and B and slot B into A, passing the protruding part of Part B through the cylinder shaped attachment on Part A
2. Once you're happy that Parts A and B are fitting together well and that they can move smoothly take the cap and glue it in place on the end of the protruding piece of Part B - this will hold everything together and stop Parts A and B from coming apart when refilling
3. When everything is fitting together nicely, you just need to take the handles and glue them in place - there's an oval indent in both Part A and Part B that they should slot into quite nicely

That's everything assembled and ready!

You're all set - have fun with your new toy!!

This is designed to be used as a bath or pool toy so doesn't have a reservoir or anything, you'll need to hold the front of it underwater and refill by pulling the rear part back (it works like a massive syringe!) then you can spray by pushing it forward again!

I hope you had fun reading and/or making this - let me know if you do have a go at it, I'd love to see!