3D printing a prototype and Injection molding likely would be the easiest route for a production run. However, I have zero interest in producing any for commercial sale. Plus, I'm cheap. In fact, I will be very happy to make one or two for myself and maybe a couple of more for a few friends. Plus, I'm a dinosaur. I still shoot black and white film with (gasp) chemical developing. I did look into the possibility of 3D printing a exhaust diaphragm but the material used for printing just didn't seem right for this application. No worries, all good. Keep the ideas comming!Fibonacci wrote: ↑Sun Oct 07, 2018 9:17 pmLooks like you are having a lot of fun... but I can't help but think you are taking the hard path if you want to do limited production runs of these diaphragms.
If you can get a NOS diaphragm (making sure it hasn't shrunk over the years!) and either measure it carefully or get it 3D scanned to generate a 3D CAD model you can use relatively low cost soft tooling and get them produced by injection moulding via a rapid prototyping (RP) company.
Xometry is an example of the type of company I mean... I have no connection to them but their website illustrates the range of RP services available.
They have just added Injection Moulding:
https://www.xometry.com/injection-moldi ... f1EALw_wcB
That looks really interesting. Thanks for the info. I've already invested in the "analog" version of this project but I'll definitely keep it in mind for the future. Mark
Interesting. The third "rubber band" valve some Scubas had was added to allow exhaust to escape from extra drillings in the event the exhaust diaphragm stuck to the horn and prevented or restricted exhaust from escaping the end of the horn. They must have experienced this sticking (or had nightmares about it) for them to go to the extra trouble of adding this feature.
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