Patent ID: 8192656

Claim:
A method of controlling an installation ( 10 ) for manufacturing containers ( 12 ) or bottles, by blow-molding or by stretch-blow-molding, comprising: a normal operating mode in a presence of a perform ( 14 ) in a mold ( 46 ), the normal operating mode including at least one first step of, the mold ( 46 ) being in a closed position, vertical lowering of at least one blow-molding or stretch-blow-molding nozzle ( 56 ) toward a bottom position; and a special operating mode in an absence of the preform ( 14 ) in the mold ( 46 ), with the mold ( 46 ) being in a closed position, vertical lowering of the at least one nozzle ( 56 ) toward the bottom position so that, whether the installation ( 10 ) is operating or stopped, communication between an interior volume ( 96 ) of the mold ( 46 ) and an exterior environment is interrupted and the interior volume ( 96 ) of the mold ( 46 ) is isolated from the exterior environment to prevent the risk of airborne particle contamination, wherein the installation ( 10 ) includes at least one molding unit ( 42 ) equipped with a control device ( 55 ) adapted to control movement of the at least one nozzle ( 56 ) which is associated with the mold ( 46 ), in which the at least one nozzle ( 56 ) is mounted to be mobile vertically between a top position and a bottom position in which, the mold ( 46 ) being in a closed position, the at least one nozzle ( 56 ) caps at least one orifice ( 88 ) for the neck of the preform ( 14 ) that includes a top horizontal wall ( 90 ) of the mold ( 46 ).