this post was submitted on 07 Mar 2024
139 points (96.6% liked)

3DPrinting

18979 readers
156 users here now

3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

The r/functionalprint community is now located at: or !functionalprint@fedia.io

There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml

Rules

If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is ![](URL)

Moderation policy: Light, mostly invisible

founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
[–] RobotToaster@mander.xyz 8 points 1 year ago (7 children)

3D printer extruded a recyclable cement-like mixture out of a nozzle in layers,

Anyone know exactly how this works?

[–] unexposedhazard@discuss.tchncs.de 10 points 1 year ago (5 children)

The whole print process video is embedded in the article... https://www.youtube.com/watch?v=cfWryED7Zrk It really is just a big 3D printer. At first i thought the walls were like 90% air with no infill but it looks like they fill them up with rebar and cement. So really its just a thing that prints unique molds to pour concrete into so not really "a 3D printed building"

[–] RobotToaster@mander.xyz 3 points 1 year ago (3 children)

Thanks, but I more meant specifics, like what is the "cement-like mixture", what extruder they are using. If it would be possible to DIY this basically.

[–] Fermion@mander.xyz 2 points 1 year ago* (last edited 1 year ago)

https://m.startribune.com/minnesota-man-builds-castle-with-3-d-concrete-printer/273410261/

This guy DIY'd it way back in the early days of concrete extrusion. He actually let a college class I was in see it. It was definitely an involved project and the result was pretty rough around the edges. His system was pretty slow and took a substantial number of batches to complete. Getting the machine and mix balanced for extruding all in one go would be pretty difficult and you'd probably need to have it mix continuously rather than in batches.

Unfortunately I don't remember much about the type of mix he used or the pumping system. So I can't guide you in the right direction.

load more comments (2 replies)
load more comments (3 replies)
load more comments (4 replies)