this post was submitted on 16 Oct 2024
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I saw a 3d printer using plastic pellets instead of filament.

Is this a good idea? Because I never saw anyone doing this.

Seller says "in this way it won't run out of filament" but I have the impression of imprecise extrusions (machine was fitted with a big 0.8mm nozzle)

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[–] tonyn@lemmy.ml 5 points 1 day ago (4 children)

Like chocolate? I would love a food safe 3d printer to print chocolate. Just sayin'

[–] evidences@lemmy.world 5 points 1 day ago (1 children)
[–] rikudou@lemmings.world 2 points 18 hours ago

Very expensive for what's basically a gimmick. Though I'd probably buy one if I owned a confectionery.

[–] Grass@sh.itjust.works 4 points 1 day ago (1 children)

he does say you can do chocolate. apart from the hot end, auger, and mechanical parts it's all 3d printed though. I guess you could go through the cursed endeavour of setting up an all stainless printer to print all the parts in one of those so called food grade filaments but I don't trust that much. Or you can just operate off the understanding that we are all saturated in plastic already.

[–] FuglyDuck@lemmy.world 2 points 1 day ago (1 children)

Imagine, if you will, hot glue sticks, only in chocolate.

You won’t need to have the entire printer be stainless, just the hot end/heatblock and heat break.

Then a feed system that drop more sticks in as the next gos down.

The stick can be driven by a food safe silicone rubber wheel. Maybe some sort of squashy tread so you get better contact/traction.

Wouldn’t be able to have super-high retraction, since it’s not a continuous length… but details.

[–] Grass@sh.itjust.works 1 points 1 day ago

I think one of the existing chocolate printers actually used that design. I was concerned about chocolate pellets in a printed hopper though.

[–] FuglyDuck@lemmy.world 2 points 1 day ago

Chocolate sticks can be printed easily, though.

12-25mm diameter filament.

Use an all metal hot end (stainless steel, preferably,). And slow its feed rate down with a gear reduction.

You wouldn’t even need them to be round if you milled out your own heat block. Just of a consistent cross section.