3D moderator internals possible?

been following with interest but did you know your design is over 100 years old?!

LINK

patent has expired now though - can't find any other info so I wonder if major fiala ever producd a prototype
 
been following with interest but did you know your design is over 100 years old?!

LINK

patent has expired now though - can't find any other info so I wonder if major fiala ever producd a prototype
So must have proved to be no better? I wonder if they progressed to texture for directional flow control?
I have found in 3D it needed lots of supports during construction. having said that I have already incorporated extra supports in the form of felt\ foam supports to the exterior.
Have already created a third idea, in which as one of the components includes a standard support frame for the foam sleeve, to easly add to future designs.
Having said all that I have been using this as a means to pick up on my previous experience of Autocad.
I just cant bring myself to splurge on a decent 3D printer (that would be suitable for (hopefully) more items down the line)), to actually print off a few bits for testing, to find the failures, week spots. 😂

Preview on Bambu-

bam mod spiral.webp
 
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One silencer design I've tried, with some success, is a tube with discs made up by 3D printing a gyroid infill with no perimeters.
Silencer discs.webp

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Ian
 
Also tried an outer gyroid tube with standard pipe foam inner, sized in chambers.
Foam-2.webp


Foam-1.webp


--
Ian
 
I have found in 3D it needed lots of supports during construction. having said that I have already incorporated extra supports in the form of felt\ foam supports to the exterior.

Preview on Bambu-

View attachment 875939
I haven't experimented with spirals, but if the angle of the spiral is decent (45% or better?) you might be able to print it vertically without supports.
Also, perhaps arrange for each part to be completed before moving on to the next part.
Unless you have an ultra fast printer, I think you'll find the print times in the preview are a tad on the optimistic side (depending on your nozzle size and layer hight).
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Ian
 
I haven't experimented with spirals, but if the angle of the spiral is decent (45% or better?) you might be able to print it vertically without supports.
Also, perhaps arrange for each part to be completed before moving on to the next part.
Unless you have an ultra fast printer, I think you'll find the print times in the preview are a tad on the optimistic side (depending on your nozzle size and layer hight).
--
Ian
Hi I haven't adjusted anything on the printer side of things, it was just what loaded on the app when the object was imported.
Thank you for providing information on speed and angle, also like the tip of gyroid and no walls.
The good news is I have taken a leap and bought a printer, well Ive paid for it at this point in time. Dancing banana
Got a lot to learn which will keep me busy over these dark days. So all tips appreciated. 👍
 
The good news is I have taken a leap and bought a printer, well Ive paid for it at this point in time. Dancing banana
Got a lot to learn which will keep me busy over these dark days.
Although a lot of people print with PLA, I'd suggest using PETG. PETG is slightly more flexible than PLA, better at surviving changes in temperature and easier to sand down and then bring back the colour.
Also, on the design front, strength of a part is more down to the number of perimeters than the density of infill (I use gyroid - it's one of the infills where the nozzle doesn't cross over itself) and, sometimes, print a part upside down, maybe to avoid having to use supports.
--
Ian
 
Thanks, I was thinking of something along the lines of this;


but with more radial "discs" and a smaller bore, for the inside of my Stealth mod. It's late now, but tomorrow I'll pop it open and get some dimensions.
 
I've got the main baffle drawn on Tinkercad and looking how to add the surface texture which isn't easy on the app.
Not used actual true dimensions yet, just working on the theory.
Tinkercad is OK, but if you can get your head around Autodesk Fusion it's got a lot more features and for home use you can get a free to use version.
 
I designed and printed from scratch.
There's a picture up in this section somewhere in another thread about moderators.
 
Yes quickly moved to Fusion, much like the Autocad I used in the past.
First picture is earlier working on individual bits, the second is a picture of the Hexagon baffle printed with the Archimedes screw in one for better strength.
I have a working moderator with 2 wraps of felt around the baffle. Size wise it is the same size as the XLK, and only a single decibel lower in noise. Not been to the range with it yet to try in the open. Upto 15m it's as accurate at the XLK.
It's been a great project, but I have found little time for it as so many other ideas are in line for being printed 🤣.
Also thank to the suggestion about fuzzy skin, a lot easier than trying to achieve a pattern on the screw faces.
.
PXL_20260228_143937706~2.jpgPXL_20260301_122440597.jpg
 
All my silenced shrouds and mods use my own design 3D printed baffle system, they work very well.
 
I have printed this on, available on Bambulabs and it works well. I suspect the 3D printed thread will become mis-aligned over time. We measured the dB levels and surprisingly internals made from ASA were quieter than ones made of PLA or even TPU.

View attachment 864494

View attachment 864495

Worth trying different materials too. I might have to try one made from PPA-CF for max ‘toughness’. The more rigid ASA printed internals were quieter than TPU; I thought that TPU (Bambulab’s TPU for AMS which is harder than normal TPU) would be a great material, it seems not.
 
I've made modular shroud baffles that incorporate tesla valves and it's very quiet for it's size, for sub 6ftlbs a mod is not necessary. Not tested the baffles on sub 12ftlbs though.
 
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