Process for manufacturing a fuel tank

A process for manufacturing a plastic fuel tank equipped with at least one communication component intended to communicate with an outside of the tank and which has a side wall, by molding a parison using a mold comprising two impressions and a core, said process comprising the following steps:

• introduction of a parison into the mold impressions;
• introduction of a core inside the parison, said core having first been fitted with the at least one communication component;
• closure of the mold so that the impressions come into leaktight contact with the core;
• pressing of the parison against the impressions by blowing through the core and/or applying a vacuum behind the impressions;
• installation of the at least one communication component on an inner wall of the parison;
• opening of the mold in order to withdraw the core;
• final molding of the parison by blow molding and/or thermoforming;
• and
• cutting the skin of the tank so as to allow access to the communication component, wherein:
• the mold impressions are provided with a hollow which, when pressing the parison against said impressions, gives rise, at least partly, to the formation of a pocket having a shape complementary to that of the hollow and comprising a bottom and a side wall;
• and
• the installation of the communication component comprises its fastening, in this pocket, by welding of at least one portion of its side wall to at least one portion of the side wall of the pocket.