Oxygen impermeable spout for a flexible pouch

A method of production of a spout for a flexible pouch, wherein the spout comprises:

• a mouth portion having a mouth for taking liquid;
• a connecting portion for a sealed connection with the pouch;
• an end portion comprising a tube having extension along a longitudinal axis, provided with an opening in connection with the mouth through an internal duct;
• wherein the end portion includes a tubular barrier at least partially embedded in the tube, made of a first plastic material having a permeability to atmospheric oxygen lower than permeability of the remaining part of the spout;
• and
• wherein the method is executable by a molding equipment comprising:
• two half-molds which, coupled, define a cavity corresponding to an outer shape of the spout;
• a counter-mold, comprising a fixed insert and a movable skirt, wherein the movable skirt is removably slidable on the fixed insert and radially outward of the fixed insert;
• wherein the fixed insert has a shape corresponding to the duct of the spout and the movable skirt has a shape corresponding to an inner tubular layer which delimits the duct and is radially within the tubular barrier;
• the method comprising:
• inserting the counter-mold, comprising the fixed insert and the movable skirt into an imprint and fitting the tubular barrier on the skirt to position the tubular barrier in a position corresponding to a tubular barrier position of a finished spout;
• after positioning the tubular barrier, injecting the first plastic material into the two half-molds,
• while slidably translating the skirt outwardly from the imprint, and translating out of the tubular barrier, the tubular barrier remains in a fixed initial position, and the first plastic material engages the skirt and forces the skirt to exit the imprint and fills space between the tubular barrier and the fixed insert.