The sides and the top+handle should be connected/glued together, and the bottom should be connected to the sides only when not in use.
I don't know the name of this type of case, therefore I cannot easily search online.
My question is: how can I design the bottom and how can I easily connect/disconnect it from the walls?
The 3D printer would be fixed/screwed to the bottom and I would like to place screws vertically, because they would require tilting of the device for closing/opening the box.
My first idea would be to glue around the base a soft wood frame that includes nuts (not hexagonal, better something with wings). The external walls would include holes through which screws with wings (as shown) would be placed when the box is to be closed.
To be clear, see other image.
However, I'm not sure how to fix the nut to the wood and I would like to keep the construction as simple as possible, since I do it for friends and I don't want to invest too much time in this.
I have available, at least: glue, MDF or plywood (I think 6 mm are enough), various screws, a drill, a circular saw. I don't have a router or a jigsaw yet (I can ask around if really needed).