Method for Producing a Fuel Tank Provided With Internal Accessories

Method according to the preceding claim, wherein at least one accessory is chosen from a ventilation line, a line supplying fuel or electricity, one or more anti-wave baffles, a reserve tank and a fuel gauge.

Method according to either of the preceding claims, wherein a camera and/or at least one sensor for measuring values such as force, travel, pressure and temperature is incorporated in the core.

Method according to any one of the preceding claims, wherein at least one accessory comprises a component provided with a pipe and/or an orifice for the passage of fluid and according to which during step b), there is introduced inside the parison at least part of the component and, during step d), this component part is fastened to the parison, this method additionally comprising a step during which an opening is made in the wall of the tank, this opening being localized at the place where the component part is fastened to the parison so as to free the opening or pipe therefrom and to permit fluid communication between the inside and outside of the tank.

Method according to the preceding claim, characterized in that the component consists of a single piece (2) comprising a pipe and that the pipe is fastened so that it passes through the opening in the wall (1) of the tank.

Method according to the preceding claim, characterized in that the part (3) is fastened to the wall (1) of the tank by welding onto the outer face thereof, on the periphery of said opening.

Method according to any one of the preceding claims, characterized in that the tank comprises a multilayer structure comprising at least one thermoplastic layer and at least one barrier layer (4).

Method according to the preceding claim, characterized in that at least one accessory comprises a component provided with a pipe and/or an orifice for the passage of fluid, in that this component is provided with an o-ring (5) and in that this component is positioned so that said o-ring (5) is in contact with the barrier layer (4) of the tank.

Method according to the preceding claim, characterized in that the component is based on polyethylene and has been subjected to a surface treatment or is based on a material having low permeability to fuels.

Method according to any one of the preceding claims, characterized in that the accessories comprise an internal ventilation circuit provided with at least one valve and a small pipe, in that the tank is moulded by blow moulding and in that the small pipe has an orifice that is closed after the tank is blow moulded.

Method according to the preceding claim, characterized in that the connection between the reserve tank and the filling pipe is made with the aid of a flexible connection incorporating a non-return valve.

Method according to any one of the preceding claims, wherein the core is provided with at least one form having an adjustable temperature and being actuated by a jack so as to accompany the forming and stretching of the plastic.