Tank for a pressurised fluid and associated manufacturing method

A method for fixing a base with at least one element of a liner of a tank or a pressurised fluid comprising said liner forming a cavity intended to contain the pressurised fluid and at least one base, the base comprising a first portion forming a longitudinal passage from the inside of the liner towards the outside of the liner, and a second portion of transverse dimensions greater than the transverse dimensions of the first portion, the second portion of the base being positioned integrally in the cavity formed by the liner, the liner comprising at least one opening of dimensions corresponding substantially to the transverse dimensions of the first portion of the base, the first portion of the base passing through said opening and being intended to accommodate a regulator, characterised in that it comprises the following steps:

• Fixing the base on an axis driven longitudinally by a cylinder;
• Introducing the base into a mould, the dimensions of the mould being adapted to the manufacture of at least one element of the liner comprising the opening;
• Closing the mould, the axis being positioned through a slot in the mould intended to form the opening of the liner;
• Forming at least one element of the liner by rotational moulding or by extrusion blow moulding of a polymer onto the walls of the mould, the polymer being heated so as to be malleable;
• Longitudinally moving the base by the cylinder so as to compress the polymer of the liner element between the mould and the second portion of the base, this step of moving the axis being carried out when the polymer is still slightly malleable or sticky;
• Cooling the polymer so as to secure the second portion of the base to the polymer.