Process For Manufacturing A Fuel Tank Equipped With An Internal Accessory

A process for manufacturing a fuel tank equipped with a plurality of internal accessories and having a plastic wall produced from a parison, said process comprising the steps of:

• a) providing a mold comprising a cavity and a plurality of moving parts, wherein when the mold is open, the plurality of moving parts project into the cavity and when the mold is closed, the plurality of moving parts do not move so that they are retracted inside the mold in order that their ends are able to conform to the internal surface of the cavity on which each is found when the mold is closed;
• b) applying heat to at least a portion of at least one of the plurality of accessories;
• c) introducing the accessories in the mold;
• d) introducing the molten parison into the mold such that the accessories are surrounded by the parison;
• e) pressing the parison against the accessories using the moving part such that the accessories and parison become attached without piercing the parison;
• f) closing the mold;
• g) flattening the parison against the internal surface of the mold cavity using pressurized gas;
• and
• h) removing the tank from the mould.

A process for manufacturing a fuel tank equipped with a set of internal components and having a plastic wall produced from a parison, said process comprising, in order, the following steps:

• a) the components and the molten parison are introduced into a mold so that the components are surrounded by the parison, said mold comprising cavities equipped with a plurality of moving parts;
• b) a pressurized gas is introduced inside the parison to carry out a pre-blow molding of said parison;
• c) the pre-blow-molded parison is pressed locally against the components using the plurality of moving parts in order to firmly attach them without piercing the parison;
• d) the mold is closed and the final blow molding of the parison is carried out by flattening it against the mold cavities using the pressurized gas;
• and
• e) the tank is removed from the mold.