Process for the manufacture of dual-chamber containers for fluid products of the medical, pharmaceutical, cosmetic type or the like, and related strip

Process for the manufacture of dual-chamber containers (1) for fluid products of the medical, pharmaceutical, cosmetic type or the like, comprising steps of:

• shaping through a die (F) at least one layer of a plastic material to form at least one substantially tubular semi-finished product (2) provided with a first extremity (2a) and with a second extremity (2b);
• closing said semi-finished product (2) inside a forming mould (3) which comprises at least two half-shells (4, 5), said half-shells (4, 5) being shaped in such a way that, when said semi-finished product (2) is closed in the forming mould, the first extremity (2a) of the semi-finished product (2) is closed while the second extremity remains in fluidic connection with a pneumatic nozzle (P);
• blowing an expansion gas through said second extremity (2b) to make said semi-finished product (2) adhere to said forming mould (3) to form at least one strip (6) comprising at least one pair of vials (7a, 7b), wherein each of said vials (7a, 7b) is provided with:
• at least one hollow body (9), defining at least one containment chamber (10) of a fluid product and comprising a substantially flat first wall (8a) and a substantially curved second wall (8b);
• at least one closed delivery neck (12);
• and
• at least one open bottom tang (14);
• and wherein said hollow bodies (9) are joined together through a folding attachment portion (11);
• introducing said fluid product into said containment chambers (10) through said bottom tangs (14);
• sealing said bottom tangs (14);
• folding said pair of vials (7a, 7b) around said folding attachment portion (11) between an extended configuration, wherein said first walls (8a) are substantially coplanar, and a configuration of use, wherein said first walls (8a) are facing each other and brought close to each other to obtain at least one dual-chamber container (1).