Ever see those one time use rapid water balloon fillers like below?
I hate them. Gone are the days of meticulous hand loading a water balloon. There was always a bit of uncertainty. Will the balloon explode on me? How much do I fill it? And if I did manage to fill it beyond a massive capacity-could I tie it off?
Alas, when I saw this throw away monstrosity of plastic, I immediately thought I could do something with this. How about making a cool vacuum attachment with it.
And so it began. I knew the most complex part would be the threads to screw into the filler. Fortunately, Fusion 360 has its own thread maker function. Score! Of course, it wasn’t that easy. There are over 15 thread standards. . .
|Yikes! So many!|
Unfortunately the standard 3/4 garden hose thread with 11.5 threads per inch wasn’t explicitly listed. So I had to measure, hack and figure it out. And then I printed my first thread.
|Look at that beautiful transition to hold the threads. The threads were hanging on by . . . threads.|
|I also used the multi variable layer. .2 mm height on the cylinder body and finer resolution for the threads.|