I had a cable with two large ends that I needed to route through a box wall. Because the ends were large I was left with large holes to fill in the wall to support a rather small cable.
In the past I've solved this problem with a stepped grommet, but I wanted to try something with a custom fit. https://www.thingiverse.com/thing:2641325
This is an experiment I did to create a moldover grommet right on the cable. The files were created using openscad so everything is parametric.
To make a custom grommet you could directly 3d print one using flexible material. Though it is hard to print overhangs in flex and flex isn't cheap. Here is how to mold one:
- First you make a grommet positive (stl) using the file "cable grommet - Parametric".
- Second you open the mold generator file which cuts the positive grommet stl file out of a two part mold. This is what you print.
- Fill with putty and close mold & let dry.
I've made high quality molded objects using silicone putty before, though your only color option is purple: http://amzn.to/2HglFyb
Shown in the picture above I tried using black hot glue because color was important. It can be done though you HAVE to use a mold release, I used chapstick. Surprisingly it works better with your hot glue gun set on low power/temp mode.