Infill Pattern With Closed Cells

Bambu Lab A1 Series General Discussions
1

Hello -

Is there an infill pattern which has completely closed off “cells”, or do I need to build that in to the actual CAD model?

I’d like to make a gasket, and it would be ideal if the infill structure couldn’t completely fill with water if the wall got punctured.

Thanks
-Jordan

2

Sounds like you are looking for 100% infill?

If that’s what you are looking for you can do 100% rectilinear infill to make it into a “solid” object.

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3

or an infill like cubic where only one section will be penetrated

4

0.1) Avoid “infill combination”, you actually want your infill well fused no matter what pattern you select.

  1. Avoid gyroid and cross-hatch, those are designed specifically to be open cell
  2. 3d-honeycomb, cubic, will give you small cells throughout the print of roughly equal size, distributed in X Y and Z. Cubic’s divisions look like big overhang walls, so you may need to do some non-obvious dialing in of infill params to ensure each cell is very well fused. (crank up infill line width?)
  3. grid, triangles, non-3d-honeycomb will give you small cells that run the entire Z height. These will also probably be the most well fused due to them printing non-overhung. (your cells will have the best chance to not bleed to the next cell)

Depending on your object, you should be able to select the right one. good luck!

edit: I just derped around with honeycomb, it will also give you 2-walls on each subdivision of the infill. I think if you are able to live with the wide-open-Z, it’s probably your best chance of making those cells watertight against one another

5

I should have specified: I’m using TPU, and I can’t do solid because its too firm, so I’m looking for something kind of elastic but closed.

I’ll try honeycomb… I can work around contiguous channels in Z.

thank you!!