Cartridge for a stereolithographic machine

Cartridge (10) for a stereolithography machine, comprising:

• a box-like body (11) comprising in turn:
• a container (12), delimited by containment walls (13), having a bottom (14), at least a part of which is transparent, and an opposite access opening (15) adapted to allow access inside said container (12), an inlet mouth (16), for the introduction of a photopolymerisable material, and an outlet mouth (17) for the release of said photopolymerisable material from said container (12);
• at least one tank (18) for a photopolymerisable material, comprising a transit opening (19) for said photopolymerisable material and an air passage opening (20) communicating with the environment;
• and comprising:
• circulation means (21), for the circulation of a photopolymerisable material between said outlet mouth (17) and said inlet mouth (16) of said container (12),
• wherein between said circulation means (21) and said inlet (16) and outlet (17) mouths, and between said circulation means (21) and said transit (19) and air passage (20) openings, valve means (22, 23) are interposed and configured to alternatively allow the following use configurations of said cartridge (10):
• a first configuration, preventing the passage of photopolymerisable material between said container (12) and said tank (18);
• a second configuration, allowing the passage of photopolymerisable material between said tank (18) and said container (12);
• a third configuration, of circulation for said photopolymerisable material, allowing the passage of photopolymerisable material between said outlet mouth (17) of said container (12) and said inlet mouth (16) of the same said container (12).