Jump to content
Ultimaker Community of 3D Printing Experts
grue

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

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 93 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 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!