Concrete Printer (Need Help)

[ralphzoontjens]

These guys have built a good concrete printer, including a CNC mixing pump.
You can ask them for advice since I am sure they researched the market.

https://www.tue.nl/en/university/dep...ut/scientific/

https://3dprint.com/139988/tue-concr...nter-pavilion/

[Marm]

Like I said, Plywood, hammer, and nails, and you can "print" all the concrete you want.

[neuo]

thanks all for the reply and for what im trying to achieve this is example chair and for the future some furniture keep in mind i would like if the chair is not heavy and it can support a human weight so i figured the only option is 3d printing since i want the inside partially filled
aa chair.jpg

thanks

[ralphzoontjens]

Neuo, unless you're doing custom pieces why not go for the casting route?
You can create a rubber mold for far less initial investment costs than 3D printing, plus a faster cycle time and much smoother detail fit for your design.
Use a wooden master model that you can even make by hand.
You will need a positive mold piece as well. And for hollowing out I am thinking CNC'd foam inserts that you suspend in the mold.

[awerby]

If light and strong is what you're looking for in a chair, concrete is the last material you'd want to use. It seems like those designs would work well in some kind of foam, which can be cast in a mold. If you want to use 3D printing in this project, use it to print the mold in sections that can be bolted together. Here's an example of a chair made that way: http://www.jorislaarman.com/work/arm-chair/