This is the process of my final project 3d modelling.


As first I made the pipe structure, and the position of the walls on the inside.
Than I extruted the solids of them.

I cutted the external parts, and jointed them. Than I made a flat surface tu cut the tube in two parts.

To make a cone structure I made two circles on the top to the bottom, and made an offset on the external surface.
At this point I made an extruted small tube, to make a base for the screws.

Than I copied the half pipes parts and pasted on the composites 3D model, to joynt with the mask.

To joint the parts I made a cavity around the two pieces to host rubber bands or similars.