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pretty basic but I made myself a less mess espresso basket prep ring thing. (lemmy.dbzer0.com)
submitted 9 months ago* (last edited 9 months ago) by naevaTheRat@lemmy.dbzer0.com to c/3dprinting@lemmy.world
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It'a detained by magnets so it doesn't get in the basket and interfere with spreading out the grounds. Needs a clean up with a lick of sandpaper, pretty stupid but these things cost like 50 bucks /shrug

EDIT: appreciate all the concern for my health, it touches dry coffee grounds. I agree that if it got wet there'd be health problems but unless it gets real humid there's just no opportunity for decay. As for random leaching same diff, without heat and wet it's not really a concern.

That said I probably will seal an improved design, this is just a test piece.

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[-] Wxfisch@lemmy.world 40 points 9 months ago

Please keep in mind that you need to seal that print before you use it with food. Because of the layers, there’s are a ton of places for dirt and bacteria to hide that are impossible to clean. Additionally, depending on what kind of nozzle you used, heavy metals can end up in your print which you don’t want to then leech into your coffee. General advice is to just not use 3d prints first good, but if you really want to you should coat them in a food safe epoxy before using.

[-] dual_sport_dork@lemmy.world 12 points 9 months ago

This is good advice.

On the bright side for OP, his part should (hopefully) only come into contact with dry coffee grounds so some of those concerns are lessened.

In other applications -- sealant or not -- I can only imagine pouring hot coffee over a PLA part would not be a recipe for success...

[-] BeardedGingerWonder@feddit.uk 1 points 9 months ago

I don't imagine the microplastics are great either tbh.

[-] A_Random_Idiot@lemmy.world 4 points 9 months ago

Honestly, instead of all that, the general rule should be don't use 3d printed stuff with food, period. Cause everyones focused on what can leech into the plastic and cause nastiness, but no one focuses about what could leech out of the plastic. Especially in this era where every month theres some new recall of some product that has something terrible in it that shouldnt be there.

and even if you do manage to find and buy a filament that claims its food safe/food grade, your printer is not. The materials used in 3d printers are not food safe, the lubricants and greases are not food safe, the previous filaments that you've printed with and have left buildup isnt food safe, and theres probably a lot in the average printers hot end that is not food safe.. Not to mention the bed, and any adhesives you might use.

Its just not worth the risk to yourself or potential loved ones, So don't even try it in all honesty.

3d printers are great, fantastic even. Mines saved a lot of money by letting me design and build replacement parts and tools to do obscure jobs specific to the situation, and even some pretty nice gifts and other stuff. Its great at a lot of things.

but it will never be good for anything to do with human consumption. Don't let 3d printed materials touch your food, drinks, or be involved in prep areas.

[-] Gutless2615@ttrpg.network 22 points 9 months ago

Microplastic speed run

[-] pigup@lemmy.world 3 points 9 months ago

He could just run a flame on it to melt whispy plastic strands down

[-] naevaTheRat@lemmy.dbzer0.com 2 points 9 months ago

Do you really thing that coffee grounds brushing up on something sheds significant amounts compared to like all the plastic you touch and then eat after not washing your hands? Or the Teflon in the rain on our crops? or storing food in plastic containers particularly during heating or freezing?

I'd be more concerned about takeway coming in shitty plastic containers that stain (indicating mixing on a molecular level) than coffee grounds touching a piece of PLA.

[-] Gutless2615@ttrpg.network 7 points 9 months ago

Yes, absolutely. Coffee grounds rubbing up against rough 3d printed plastic is going to act like little grinders pulling off bits of of plastic directly into the grounds.

Not to say that we all haven’t already lost the microplastics speed run. I am concerned about the things you listed, but yeah, I wouldn’t want anything 3d prone to be so close to so many small hard moving pieces of food.

[-] naevaTheRat@lemmy.dbzer0.com 2 points 9 months ago

3d printed plastic isn't much worse than other plastic. The grinds aren't under any force.

Have a look at a printed part under SEM and you'll see it's quite smooth and cohesive. Coffee grounds are light and fluffy, they don't grind plastic.

I think you're not basing this on any scientific investigation.

[-] Gutless2615@ttrpg.network 3 points 9 months ago

To each their own I suppose

[-] yokonzo@lemmy.world 11 points 9 months ago

So usually id agree that 3d prints shouldn't be used for food, but this is a coffee hopper, they're made from plastic already and I guarantee you the ones we used at Starbucks didn't get that clean either, it's fine, just sand it and get rid of those hairs

[-] Maalus@lemmy.world 18 points 9 months ago

3d printing vs injection molding is a huge difference, so it's not fair to say "they are both made of plastic".

[-] yokonzo@lemmy.world 6 points 9 months ago

It's also not taking a huge amount of friction either, it's literally just a hopper, walls to gravity feed the shelled beans into the grinder, sometimes it's okay to step away from the rules a bit and just go, that'll be fine

[-] Maalus@lemmy.world 6 points 9 months ago

"rules" are there for a reason. But hey, it's your health and safety, do whatever you want.

[-] yokonzo@lemmy.world 13 points 9 months ago

Yes but common sense is also there for a reason, I would absolutely trust this material to handle very light duty tasks like this. There is a difference between following rules within the boundaries of common sense and spouting them off in any tangentially related scenario without having done any testing yourself or even seeing the product in action. There is simply no way to definitively say "this is a bad idea" without doing microbe tests and comparing it to baseline levels after a period. I think people tend to jump on the not food safe bandwagon a little too readily in this community and I'd rather not see this place become like an average reddit hobby ground

[-] anguo@lemmy.ca 4 points 9 months ago

I'd quadruple upvote this if I could.

[-] Maalus@lemmy.world 4 points 9 months ago

Yeah there is a way to say "this is a bad idea" without microbes tests. This is a bad idea, plain and simple. Just because you want to say otherwise, doesn't mean you are right. It's simply not food safe.

[-] naevaTheRat@lemmy.dbzer0.com 7 points 9 months ago

Oh you're being a wowser.

So food safe is a phrase averaging a series of concepts. I agree it is tremendously unwise to say eat soup repeatedly out of a 3d printed bowl because of inability to clean it properly and leaching of contaminates.

It's probably not very dangerous to eat peanuts once out of a 3d printed bowl because there's no liquid to leech shit through and you're not relying on washing it.

you need to think about the underlying mechanisms of things. If you don't know anything then abundant caution is wise, but you should probably couple it with humility.

Leeching through solids is the only real concern here and I probably get orders of magnitude more heavy metals from my tap water (which are still safe limits) or VOCs from the plastic decaying slowly in the soil that grows my veggies (all soil on earth is contaminated at this point, but I grow next to farmers and lemme tell ya nobody hates the environment like farmers).

[-] Maalus@lemmy.world 3 points 9 months ago

I know way more than you realize. As I said before - you do you. It won't be me who ends up drinking plastic.

[-] HewlettHackard@lemmy.ca 4 points 9 months ago

It’s interesting that previously you said bacteria and now you say plastic. You know a lot, so enlighten the rest of us. What’s the concern here? As others have pointed out, coffee hoppers are rarely cleaned by most people, and this never gets wet and mostly handles dry whole beans with a little bit of dry bean dust. PLA is theoretically food safe as a material itself (and used in plastic utensils and containers). What are we missing? Please explain thoroughly in a single long post, not a quip because too many of us aren’t understanding from short quips.

[-] Maalus@lemmy.world 3 points 9 months ago

Why should I? So I get even more combative comments from people that don't know anything and go "nu uuuh I have done this and I'm fine"?

First of all, I didn't say "bacteria" only. I said that there is a difference between injection molding food safe plastics, and 3d printing them. The difference is huge in the terms of surface quality, with a 3d prints' layerlines being a great place for bacteria to form. And you don't need to put wet stuff into it, to make it form bacteria. Simply put, injection molding makes a uniform surface - by the design of the process, during injection the plastic gets squished to the walls of the mold, with incredible pressure (700kgf on some "hobby" machines, like the Buster Beagle, imagine what a real, few tonne press can do). The process of 3d printing naturally lacks that, leading to a porous end result.

The process of 3d printing introduces contaminates into the plastic. The hotend is basically a huge chemical hazard. Especially if you don't just print PLA. No amount of cleaning it can change that - burnt bits of plastic, especially on brass, are impossible to remove.

The process of printing also coats the model with tiny particles of plastic that are simply harmful to you when ingested.

Add in the fact, that PLA has other additives that are not food safe, and that you need an actual, certified roll to be "food safe". Most colorings aren't that. Most strength additives aren't that.

Overall there are countless reasons to keep 3d printing away from your kitchen. It's not "going to be fine", it's a health hazard.

I'll repeat myself for a third time, and stop replying to angry people here - you do you. I wanted to warn people who might not know the risk, who are not in the plastics business. I'm not here to engage in discussions on how to bend health and safety for a project that is not worth it.

[-] PiousAgnostic@lemmy.world 5 points 9 months ago

I've got an education in Chem E, and biomolecular engineering. And Im an engineer in the hyrdo-carbon polymer (plastic/rubber) business. He'll be no worse then all of us really.

I personally wouldn't recommend using printed pla for anything food related. But if you want to be realistic , if you 3d print, you have this stuff in your body through cross-contamination consumption and your lungs from mass transfer. (If you can smell a chemical, it's in your blood stream)

In the grand scheme of things, the dude will be fine.

[-] naevaTheRat@lemmy.dbzer0.com 2 points 8 months ago

Gosh the internet is exhausting when people think they're saving someone's life. My house is literally made of asbestos, radioactive isotopes are in our teeth now from nuclear testing, every single thing in the world if you live anywhere near a road is coated in a layer of motor oil (cleaning that stuff to stop darkening during electron microscopy required pirhana solution and a 3 day bake and pump), the dust in your house is not insignificantly vulcanised rubber from car tyres, lead glass wine glasses leech lead....

we live in a world of poisons, it's all about dose. Eating soup from a 3d printed bowl (or any plastic, I refuse to store food in it these days) is pretty unwise but it's not like my 3d printer is made or arsenic and demons. I bet most of these chucklefucks touch 3d printed items and or wrench on their printers and don't wash their hands before eating.

Fuck man, your talcum powder is scraping plastic from the inside of the bottle and then you shake that shit in the air and apply it to children. A 3d printed funnel for try soft powder isn't a bomb haha.

[-] callcc@lemmy.world 2 points 9 months ago

Chill out about your microbes already. The world is full of them and other micro-organisms that don't harm you.

[-] Gutless2615@ttrpg.network 3 points 9 months ago

Or - and this seems to have escaped your analysis - in this case we’re talking about health and safety rules and rules dealing with food preparation. Not exactly the kind of rules you want to be gambling with. But sure. It’s a feee world, do what you want. But I still wouldn’t want to be using this with my coffee.

[-] naevaTheRat@lemmy.dbzer0.com 8 points 9 months ago

Yeah you need moisture for decay. Tiny fines might eventually go rancid in tiny pores and taste or smell a little bad but idk. She'll be right.

Like it's not like I clean the burrs that grind the beans much so if rotting was a problem I'd be dead already.

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[-] anguo@lemmy.ca 8 points 9 months ago

I've been meaning to make one that molds to my grinder to prevent grinds flying all over the counter.

Just FYI, you can find metal dosing rings with magnets for as low as $3 on AliExpress. I'm sure yours fits better though!

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[-] GreatBlueHeron@lemmy.ca 5 points 9 months ago* (last edited 9 months ago)

I know it's probably sacrilege, but I avoid the need for one of these by grinding half a dose, tamping a bit then grinding the rest and finishing the tamp. I'm using a Breville Barista Express so couldn't (easily) use one of these even if I wanted to.

I'm curious how you retain the magnets in it? Are they printed in, or mechanically added later? (I know very little about 3d printing, this just came up in my top-6-hour feed)

[-] maniacal_gaff@lemmy.world 6 points 9 months ago* (last edited 9 months ago)

I haven't done much with magnets, but I saw one model where you pause the print halfway through, drop magnets into the holes, then continue the print and they get sealed in Amontillado-style.

[-] PlasticExistence@lemmy.world 4 points 9 months ago

Pop the magnets into the paused print.

The magnets: "Hahaha. This is a fine joke, good sir!'

Resume print

Magnets: "Yes, a very funny joke indeed. Wait, sir, where are you going! Sir! SIR!!"

Walk away knowing that neither you nor anyone else will see those magnets again

[-] yokonzo@lemmy.world 2 points 9 months ago

Oh God imagine being 3d printed alive into your casket

[-] DreadPotato@sopuli.xyz 2 points 9 months ago

Worst part is it taking forever for it to print the casket around you, and you're just lying there unable to do shit and just watch the casket close around you in ultra slow-mo. Like being buried alive with a tea-spoon for a shovel.

[-] naevaTheRat@lemmy.dbzer0.com 2 points 9 months ago

I'm not really a coffee wanker so I don't know one way or the other what tamping halfway would do. I just want to be able to dump the grounds in, shake, and tamp.

The magnets are just push fit into little holes in the bottom. I just tap them in with blunt nail and a hammer.

[-] iamnotdunningkruger@lemmy.world 1 points 9 months ago

coffee wanker

Lol wut

[-] naevaTheRat@lemmy.dbzer0.com 1 points 9 months ago

Oh you know how coffee people are.

[-] iamnotdunningkruger@lemmy.world 3 points 9 months ago* (last edited 9 months ago)

You 3D printed a dosing funnel.

You 3D printed a dosing funnel.

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[-] Anticorp@lemmy.ml 4 points 9 months ago

Super cool! Great job. You can eliminate that seam by changing the position to random in Cura.

[-] tcrpz@programming.dev 4 points 9 months ago

You can find dosing funnels for ~$12 on Amazon. Still overpriced but eclipsed by the investment you made in the espresso machine.

[-] naevaTheRat@lemmy.dbzer0.com 2 points 9 months ago

I have a non standard old timey portafilter.

Pet peeve, a coffee machine isn't an investment. Not in the literal sense and the creepy corporatisation of language is weird. It's just an expensive toy that makes me like life a little more :) I actually got an old europiccola because no electronics (bimetal strip and heating coil aside) means I can keep this thing working indefinitely.

[-] 01189998819991197253@infosec.pub 3 points 9 months ago

Hey, that's neat! I use a scrap piece from a previous employer. It's a 2inch tall stainless steel combiner ring. Definitely not as cool as yours and definitely not light enough for magnetic holds. You win lol

[-] naevaTheRat@lemmy.dbzer0.com 4 points 9 months ago

Yeah but yours isn't made of plastic so I think we can both find things to be pleased about.

Thanks for the kind words!

[-] 01189998819991197253@infosec.pub 4 points 9 months ago

Oh, for sure! It is annoying having to hold it as I work with it. But, I don't have a 3D printer, so I did what I could with the tools at my disposal. I am happy with it :)

[-] naevaTheRat@lemmy.dbzer0.com 4 points 9 months ago

If it's at all magnetic (I know some stainless isn't) then you could probably just slap a neodidlium magnet on either side to hold it. Or you could make something to locate the phlangey things on the portafilter and attach them to the outside of the ring? Could even be as simple as 4 nails with the tips ground off?

[-] 01189998819991197253@infosec.pub 2 points 9 months ago

I have neodymium magnets from another project. I should do that. They're about 2cm in diameter, but I can probably cut them to size.

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[-] NuXCOM_90Percent@lemmy.zip 3 points 9 months ago

Heads up, make sure you use food safe filament for this. And I would still be rather wary of excessive micro plastics in my morning brew

[-] tonyn@lemmy.ml 3 points 9 months ago

A lighter will tidy up the stringing without making the mess that sandpaper will. Just don't linger too long or the part will warp. It should take less than a second to make the strings disappear with a lighter.

[-] IMALlama@lemmy.world 3 points 9 months ago

Hot a air station, if you have one, will also do wonders here. I suspect an adjustable hot air gun would also probably work, but those things can put out some serious heat so be careful.

[-] tonyn@lemmy.ml 1 points 9 months ago

I actually use a Lexivon torch, and move quickly. Lots of heat in a precise location for a short amount of time.

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this post was submitted on 24 Dec 2023
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