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Method for producing a fuel tank provided with internal accessories and having a wall made of plastic made in a single piece by moulding a split parison or a parison in at least two parts, said method comprising the following steps: a) the parison is introduced in the heat-softened state into a moul

Method for producing a fuel tank provided with internal accessories and having a wall made of plastic made in a single piece by moulding a split parison or a parison in at least two parts, said method comprising the following steps: a) the parison is introduced in the heat-softened state into a mould comprising dies; b) a core on which the accessories are placed is introduced inside the parison; c) the parison is pressed onto the dies of the mould; d) the accessories are fastened to the parison with the aid of the core in an ideal layout; e) the core is withdrawn and the mould is closed; f) the tank is moulded from the parison; and g) the tank is removed from the mould.

대표청구항 ▼

1. A method for producing a fuel tank; the fuel tank comprising:an internal component; anda plastic wall obtained by moulding a parison;the method comprising:a) introducing the parison in a heat-softened state into a mould comprising dies;b) introducing a core on which the internal component is plac

1. A method for producing a fuel tank; the fuel tank comprising:an internal component; anda plastic wall obtained by moulding a parison;the method comprising:a) introducing the parison in a heat-softened state into a mould comprising dies;b) introducing a core on which the internal component is placed inside the parison in the mould;c) closing the mould and pressing the heat-softened parison onto the dies of the closed mould;d) fastening the internal component to the parison with the aid of the core;e) opening the mould and withdrawing the core from the opened mould;f) closing the mould with the core withdrawn;g) moulding the tank from the parison in the closed mould wherein an equilibrium of pressure is provided between the pressure inside the component and the pressure inside the tank; andh) opening the mould and removing the tank from the opened mould. 2. The method according to claim 1, further comprising making an orifice in the component for providing the equilibrium of pressure. 3. The method according to claim 2, wherein the component is an internal ventilation circuit comprising at least one valve and a small pipe,the small pipe is fastened to the parison, andthe orifice is made in the small pipe fastened to the parison. 4. The method according to claim 2, further comprising closing the orifice. 5. The method according to claim 4, wherein closing the orifice is performed after the blow moulding phases. 6. The method according to claim 1, wherein the tank comprises a multilayer structure, and the multilayer structure comprises at least one thermoplastic layer and at least one barrier layer.