Patent ID: 8465274

Claim:
A moulding unit for a plant for blow-moulding plastic containers ( 2 ), particularly bottles, from respective parisons ( 3 ), the moulding unit being movable along an annular path (P) and comprising two half-moulds ( 17 a , 17 b ) positioned one on the inside and the other on the outside of the path (P), the half-mould ( 17 b ) on the outside being movable about a substantially vertical pivot axis ( 18 ) relative to the half-mould ( 17 a ) on the inside between a position of opening and a position of closing at least two cavities ( 19 ) for blow-moulding respective containers ( 2 ); the two half-moulds ( 17 a , 17 b ) defining a closing plane ( 20 ) that is substantially tangent to the path (P), wherein both half-moulds ( 17 a , 17 b ) are movable away from each other through different angles between respective open and closed positions, the angle of movement of the half-mould ( 17 b ) on the outside towards the outside of the path (P) being greater than the angle of movement of the half-mould ( 17 a ) on the inside towards the inside of the path (P), wherein the half-mould ( 17 a ) on the inside of the path (P), in the respective open position, is rotated a predetermined angle apart from a position of finished blow moulded articles, inwardly with respect to said closing plane ( 20 ) that is substantially tangent to the path (P).