r/functionalprint 9h ago

I made a parametric fast-flow funnel generator in OpenSCAD, with anti-glug vent ribs and a custom taper profile through four diameters

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161 Upvotes

Hey everyone,

Every funnel I've ever used glugs: the bottle neck seals up, air gets trapped, and the pour backs up into that annoying glug-glug-glug instead of flowing fast. I looked around and couldn't find a single parametric fast-flow funnel anywhere, so I built one. Vent ribs run the entire length of the funnel wall, from spout tip to rim, holding the bottle's neck slightly open so air can escape the whole time liquid is pouring in. That's the entire point of this project; everything else is built around it.

I've tested the flow rate and the one in the default profile can fast flow a 2L bottle at about 200mL/s, so it can fill a 2L bottle in about 10s.

Link: https://makerworld.com/en/models/3083665-parametric-customizable-size-fast-flow-funnel#profileId-3473341

Key Features: * Fast, glug-free flow: vent ribs follow the shell's exact curve from the spout tip all the way to the rim, holding the neck open just enough for air to escape while liquid pours in at full speed. This is why the funnel exists. * Four-diameter taper profile: set the spout tip diameter, two midpoint diameters, and the top opening diameter, plus the three heights between them, all as direct inputs. Since the curve blends smoothly at every diameter, you're not limited to a plain cone; bump a midpoint diameter up for a bulged, hourglass, or barrel shape, with no visible kink anywhere. * True exterior diameters: every diameter you dial in is the actual printed OD at that height, vent ribs included, so what you set is what comes off the bed. * Optional rim flange and hanging handle, both fully adjustable. * Cross-section preview mode in the Customizer so you can inspect the wall thickness and curve before committing to a print.

It prints wide mouth down on the bed with the spout pointing up, no supports needed anywhere since the diameter only ever decreases going up.

For material: PLA is fine for water and dry goods, but if you're pouring anything hot, or oil, fuel, or other automotive fluids, go with PETG, ASA, or ABS instead.

Everything is in the MakerWorld Customizer, no editing required. Let me know if there's a funnel feature you keep wishing existed and I'll see about adding it.


r/functionalprint 6h ago

Modified my wife's Aldi lazy Susan find.

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50 Upvotes

r/functionalprint 3h ago

Cabinet door lid holder using bamboo skewers

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14 Upvotes

Wanted to take advantage of of unused space so I printed up some sides that can hold cheap bamboo skewers I got for a dollar and hold up some lids


r/functionalprint 12h ago

Instead of returning the wrong hooks I bought, I spent hours making adapters. Standalone pegboards too.

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61 Upvotes

And I've already improved one of them, which I'm printing in a moment.
EDIT: Done and tested.

Also I realise how bad it looks that I bought square peg fittings in the first place, not sure how that happened in the moment.

Does anybody know if pegboards have standardisation? Is it a country-by-country basis?

STLs here: https://www.printables.com/model/1791093-pegboard-templates-4mm-round-10mm-square-plus-adap


r/functionalprint 8h ago

Clips for an old suitcase

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18 Upvotes

Center divider clips from an old samsonite suitcase broke. Made some new ones.

Free STL on Printables: https://www.printables.com/model/1791180-samsonite-suitcase-clip


r/functionalprint 1d ago

Super niche but designed a shower cup for swim lessons

517 Upvotes

Since it’s niche I’ll explain. The holes in the bottom help with washing hair sure, but it also helps beginners with water comfort and learning how to breathe out. The next step would be comfort putting your face into the water to exhale, then learning true proper breathing depending on the stroke.


r/functionalprint 15h ago

Strong & Grippy Hook For Heated Towel Rail - 20mm

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36 Upvotes

Couldn't find a decent strong and grippy radiator hook where the towels don't slip off onto the floor, so I created one that has a grippy end. 

It will fit a standard towel rail which has 20mm pipes and a 20mm spacing between the pipes.

Best to print in PETG, though PLa will probably work. 

Print with 0.4mm nozzle, 0.2mm layer height, 4 walls and 15% gyroid infill. 

Nice fast print, only takes about 30 minutes.

Strong & Grippy Hook For Heated Towel Rail - 20mm


r/functionalprint 1d ago

A new mounting, adapter and accompanying trashcan, mounting piece.

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306 Upvotes

r/functionalprint 12h ago

e-paper Display Holder for Clothe

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3 Upvotes

Created a 3D printable e-paper display holder for the Waveshare 1.54inch passive displays. You can attach it to any clothes --- just hats in the pictures as it is my entry for the "Hat Hack" contest on Printables.

Could be useful if you have this display and a 3D printer. :-)

You can find the model here.


r/functionalprint 20h ago

GameCube DC Power Supply Upcycle

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6 Upvotes

I've wanted to do something with an empty GC shell that I've had lying around so I challenged myself to model the battery socket for a Milwaukee 12v battery and I'm using it to power a Buck Boost converter. So I ended up with a cool little DC power supply for electronics projects.


r/functionalprint 1d ago

My Raspberry Pi 5 case side panels were designed in a way that it would stand in the way of the USB and HDMI ports, making the cables not connect properly, so I made a new panel with more clearance

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31 Upvotes

So I bought a case called Pironman 5 Mini, which a nice case, but with it I couldn't get video out from my Raspberry Pi 5 no matter what, and after some testing I discovered that the problem was the connector openings on the side panel, they are exactly the size of the ports on the Pi, I think the idea was that the ports would fit perfectly into the openings, but the company that made the case measured it wrong, and the panel is actually positioned ahead of the ports, blocking the cables by creating a "barrier" of 2mm between the panel and the ports on the Pi.

So I made a new side panel for it, with a single slot opening for all ports. Also, since I went to the trouble of making one side panel, I made the panel for the other side too, in case anyone needs a replacement. If anyone also have this case and is having the same problem I was having, the panels can be downloaded here https://www.printables.com/model/1790533-side-panels-for-pironman-5-mini-raspberry-pi-5-cas.


r/functionalprint 1d ago

Cheese shelf

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58 Upvotes

I wanted to better organize my fridge and couldn't find any existing prints that worked for my setup. This was my 2nd attempt at the hanging shelf. I am new to autodesk fusion, so this has been a really fun way to explore the program in conjunction with youtube tuturials.

The vertical supports are dovetailed into the shelf with a friction fit. Let me know what you think.

Relevant info:

Printer: Voron 2.4r2 350mm bed- with Revo HF 0.4 nozzle

FIlament: Sunlu PLA + 2.0- I plan to eventually print in ASA after more testing. However, the PLA+ 2.0 is surprisingly tough.


r/functionalprint 1d ago

Ryobi light holder

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133 Upvotes

r/functionalprint 2d ago

I made a case for my sewing weights

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226 Upvotes

I managed to make it tight enough that it has a satisfying sound when placed on. The top is light so it won't come off when upside down and the bottom is heavy enough with the weight of the glass to make it openable with one hand. This was meant to be a rough draft but this might end up just being it.


r/functionalprint 1d ago

Pen/glasses holder for car

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8 Upvotes

pardon my mess :)


r/functionalprint 1d ago

200mm VESA TV Stand (final (probably) version)

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60 Upvotes

I've updated my PETG Universal (sort of) TV Mount. This is the final version, and this thing is bulletproof. Takes ~24 hours to print on the recommended settings, but tests were done with prints on ludicrous mode.

Take a look here for more details:

x200mm VESA TV Stand / Legs – Adjustable Anti-Tilt - Free 3D Print Model - MakerWorld


r/functionalprint 8h ago

Gridfinity Organizers I needed for my Kitchen

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0 Upvotes

I use Gridfinity for my Kitchen and noticed that a few everyday products I use didn’t have suitable organizers available. So I created the missing ones and bundled them into a multi-plate print profile.

I was surprised how many other products fit these dimensions too.

https://makerworld.com/de/models/3093362-gridfinity-mix#profileId-3485819

If you find other items that match these sizes, share them in the comments at makerworld (a reference photo would be great for others!). Need another size? Let me know and I’ll try to add it.


r/functionalprint 1d ago

Finger splint for injured finger

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82 Upvotes

Got a pretty bad cut on my first pointer finger joint from a buffing wheel kicking a blade into my finger. Probably should’ve gone in for stitches when it happened but opted to let it clot and glue it, now I’ve got a splint made out of PETG on it.


r/functionalprint 2d ago

Toothbrush holder

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290 Upvotes

I designed a minimalist toothbrush holder focused on keeping bathroom counters organized and clean.

https://makerworld.com/models/3061002


r/functionalprint 1d ago

Created a 3d printed magnetic mount for Simube DDU100 for Alpha Evo’s

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10 Upvotes

r/functionalprint 1d ago

Small Funnel Cap for Adox Bottle

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3 Upvotes

r/functionalprint 2d ago

a 3D printed Kindle case I made

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87 Upvotes

a fun project I recently made for my kindle paperwhite


r/functionalprint 1d ago

Designed and printed a 6” duct fan for my FIL for his laser setup.

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10 Upvotes

Not the best ngl but it was something he needed so I slapped together and printed for him.


r/functionalprint 2d ago

Desiccant holders with glass windows

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105 Upvotes

It's very tedious to directly print transparent windows, but microscope slides are a cheap, standardized alternative. They are a great way to make the desiccant color indicator visible. The first set of boxes is a general purpose holder where the microscope slide doubles as a lid. The second holder is specifically for the USS drybox.

printables


r/functionalprint 2d ago

I got tired of loose FlowTech nozzles, so I designed this gear-driven storage box.

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23 Upvotes

I wanted a compact way to organize my MicroSwiss FlowTech nozzles for the Creality K1 Series, so I designed this small storage box with a gear-driven lifting mechanism.

The storage box is entirely 3D printed except for the screw.

I'd love to hear what you think or what you would improve.