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Filling 3D prints with filler material (discuss.tchncs.de)
submitted 1 week ago by to c/3dprinting@lemmy.world
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Do you have any experience doing so?

I have a project coming up where I would like to print a large object and fill it with sand and resin.

Sand, as we all know is coarse, rough and irritating and it gets everywhere. So it's good filler material.

Afterwards I want to solidify it by adding resin, hoping that it gets everywhere as well.

What other materials are usable? Perhaps concrete but it can't really dry inside a printed object right?

The infill should be Gyroid with 10% with at least 3 perimeters IMO. Would something like tree infill work as well? Or removable infill? I'm not sure how to get a slicer to do that though.

I intend to build parts for a CNC machine so I value weight and rigidity in this project.

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[–] 13 points 1 week ago (1 child)

Perhaps concrete but it can't really dry inside a printed object right?

Concrete doesn't dry; it hydrates and cures. It can harden underwater, let alone inside a container.

If anything, the potential problem with concrete is that curing is exothermic, so it might heat up and distort your part. It'd have to be a pretty big print for that to happen, though.

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