this post was submitted on 24 Dec 2023

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pretty basic but I made myself a less mess espresso basket prep ring thing. (lemmy.dbzer0.com)

submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/[email protected]

12 comments fedilink hide all child comments

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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[–] [email protected] 0 points 10 months ago (2 children)

Microplastic speed run

[–] [email protected] -2 points 10 months ago (1 children)

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.

[–] [email protected] 1 points 10 months ago (1 children)

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.

[–] [email protected] -1 points 10 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.

[–] [email protected] 1 points 10 months ago

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

[–] [email protected] 1 points 10 months ago (1 children)

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.

[–] [email protected] 1 points 10 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...

[–] [email protected] 0 points 10 months ago* (last edited 10 months ago) (1 children)

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)

[–] [email protected] 0 points 10 months ago* (last edited 10 months ago) (1 children)

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.

[–] [email protected] 0 points 10 months ago (1 children)

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

[–] [email protected] 0 points 10 months ago (1 children)

Oh God imagine being 3d printed alive into your casket

[–] [email protected] 1 points 10 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.