Jump to content
Cura Connect | Survey Read more... ×
Ultimaker Community of 3D Printing Experts

box hollowed out in model vs. not

Recommended Posts

so i've been playing with a small building - basically the shape of a box with some ins & outs where windows would be, but nothing really detailed as i'm doing this for comparisons.


1. i modeled the building with the 4 wallls, but ZERO thickness to the walls. (i'll call this "solid walls")

  • in cura i turned off top/bottom - set top/bottom thickness to 0.0mm
  • i turned off infill
  • i set my wall thickness to a multiple of my nozzle dia, 4.0mm
  • i think this is more or less vase mode?


2. i modeled the building with 5mm thick walls. (i'll call this "hollow walls")

  • in cura i turned off top/bottom - set top/bottom thickness to 0.0mm
  • i turned infil on and set to 10%
  • i set my wall thickness to 0.8mm - so this gives me two lines for outer wall and two lines for inner wall with void in-between which is filled with infill


i never thought about it to this point, but wow what a difference in estimated print time & material usage


the infilled walls (hollow) model is showing 18.25hrs vs. 14.3hrs for "solid" walls and 22.53m of material vs. 44.85m!


overall both models are roughly 91mm (w) x 91mm (d) x 78mm (h)


you really have to think these things through!


one concern might be how thick would walls have to be for some amount of structural integrity. in the case of #1 above, would 4mm thickness be enough for something up to 12inches or 15inches tall? etc etc...

solid walls.jpg

hollow walls.jpg

Share this post

Link to post
Share on other sites

Thicker walls with the infill and lots of air in there is much stronger than thinner walls that are solid.  Having said that the model in the upper photo is probably plenty strong but you'll just have to test it and find out for yourself.  In fact you could probably cut the infill in half roughly.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
      • 9 replies
    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!