Installation for producing sterile bottles by blow molding sterilized preforms

An installation (10, 10′) producing sterile bottles (14) by blow molding starting from plastic preforms (12), where the preforms (12) are conveyed to the interior of the installation (10, 10′) in a continuous stream which flows from upstream to downstream, including:

• a sterilizing treatment unit (26) including an atomizing device (36) provided with at least one nozzle (38) which sprays a stream (F) of sterilizing product in the form of a jet towards the neck (16) of each preform (12) during treatment, with the aim of sterilizing at least the internal walls (50) of the preform (12),
• a thermal conditioning unit (28), including at least one oven (40) which heats the preforms (12),
• a molding unit (30) including at least one mold (42) and at least one blow-molding device (44) which subjects each preform (12) to internal overpressure in such a way that it assumes the shape of the mold cavity (42), producing a bottle (14),
• characterized in that the mean axis (A2) of spraying of the nozzle (38) is generally parallel to the axis (A1) of the preform (12) during treatment and is radially off-center with regard to the axis (A1) of the preform (12), and in that the form in which the stream (F) of sterilizing product is sprayed at the interior of the preform (12) is that of laminar flow.