Three part respirator venturi valve for casting

thingiverse

I cut it in such a way that the nozzle can slide in, and that the two cones of the venturi can be screwed together. I am currently printing it, I use ABS as it has more give The intent is to have this printed and then used to make a silicone mold. The mold can then be used with acrylic resin. The nozzle is the only one then needed to be printed. There could be also nozzles made with different diameter