Square Mesh Sieves

This project originated as a proof of concept for building a (non-professional) tool for investigating the physical characteristics of soils and clays for raw earth constructions/plasters.
It consists of a set of 5 sieves with square mesh sizes of 1.5 - 1.0 - 0.75 - 0.50 - 0.30 mm (mesh thickness 0.40 mm, equal to the nozzle) useful for roughly evaluating the particle size distribution of clays, powders, and granules. The sieves can be arranged in a cascade to estimate the particle size distribution (assuming no chemical/electrostatic interactions with the plastic of the sieve).
The design of the sieves and screws was studied to avoid supports.
The components of this project were designed to be used with a "vibrating sieves" device, but that's another story…

Technical note: to quickly create the mesh of the net, I used a "modifier" (slicer Bambu Studio) on the bottom of the sieve and set the "sparse infill pattern" to "Grid" with different values of "sparse infill density" depending o