Patent ID: 10315350

Abstract:
The invention relates to a stretch rod for the form-and-fill head of a machine for forming and filling of containers produced from preforms. The object of the invention is to devise a stretch rod of this type which can be cleaned and/or disinfected without being disassembled and without any other intervention. According to the invention, the object is achieved by a stretch rod (5) for the form-and-fill head (3) of a machine for forming and filling (molding and filling) of containers produced from preforms (2), which rod comprises a drive unit for axially moving said stretch rod (5). At least the part (6) of the drive unit which is connected to the stretch rod (5) is arranged in a drive chamber (11) which is sealed off from the regions of the form-and-fill head (3) which come into contact with the filling material (the material with which the container is being filled). The inventive stretch rod is characterized in that the sealing action is achieved by a seal (12) which surrounds the stretch rod (5).