This model is for the tool changer Model Competition.
Most phone cases are made from flexible material, but by using Polycarbonate on the outer shell, the amount of force absorbed by the phone is highly reduced.
This design combines a high impact plastic (PC) and flexible plastic (TPU or Ninjaflex) to increase the chances of survival of your smartphone.
By taking advantage of the tool exchanger from E3D, this phone case can be printed with 3 material.
- Use Polycarbonate to print "DC2 PC case"
- Use Ninjaflex or TPU to print "DC1 Flexible case".
- Use PVA to print supports. You must enable "supports everywhere"
Preferably print at 0.1mm.
Use 3 shells to have a 1.2mm perimeter. (0.4mm nozzle). This will also make the PC shell 100% solid.
Infill 10%-25% for TPU
Infill 40%-60% for Ninjaflex
Printing speed:25-40mm/s depending on your printer.
Brim optional for PC layer adhesion
I did a simple simulation to visualize the amount of force received on the phone.
So the simple phone case with flexible material would deform around 15mm, this means that the force is still getting to the phone in a softer way.
By using a PC outer shell, the deformation is less than 1mm. then the force would get into the TPU case to absorb the few remaining forces.
This simulation could probably be done in a more realistic way, but I did it just to have the concept validated.
This phone case if for Huawei Mate 10 Pro.