Thread: Question about hinges for Plywood Box

Hello,

Just a small preface, i haven't worked with wooden construction for a few years now, so i may not know the correct technical terms for what i am trying to discuss.

I am undertaking a small DIY hobby case, and would like some advice on the types of hinges to duplicate what i have created through a CAD design.

The CAD drawings are as follows.

Imgur: The most awesome images on the Internet
Imgur: The most awesome images on the Internet


The main question that i am trying to find an answer for is how to correctly hinge the middle 272x900 section to the outer two box sections.
The way i want it to work for the second image is that the smaller middle piece will eventually turn out to be the bottom section of the case, with the outer sections rotating around the join to fold up
together to meet, which will form the sides.

The materials that i am planning on using for the construction is 9mm marine plywood (The CAD is a bit out of date since it is measured as 6mm)
I am leaning towards using a piano hinge, but am worried about the screws going through the bottom of the plywood.

I would like the surfaces when in the open state (first image) to fit close together as possible (if its possible).

I can supply any more information if its requred.

Thanks in advance.