PROCESS FOR MANUFACTURING A FUEL TANK EQUIPPED WITH AN INTERNAL ACCESSORY

摘要

Process for manufacturing a fuel tank equipped with an internal accessory (2) and having a plastic wall produced from a parison (5), said process comprising, in order, the following steps:
a) the accessory (2) and the molten parison (5) are introduced into a mould (1) so that the accessory is surrounded by the parison (5), said mould (1) comprising cavities equipped with at least one moving part (4);
b) a pressurized gas is introduced inside the parison (5) to carry out a pre-blow moulding of said parison (5);
c) the pre-blow-moulded parison (5) is pressed locally against the accessory (2) using the moving part (4) in order to firmly attach the two without piercing the parison (5), the attachment being carried out by welding, or by mechanical anchoring, or by snap riveting;
d) the mould (1) is closed and the final blow moulding of the parison (5) is carried out by flattening it against the mould cavities using the pressurized gas; and
e) the tank is removed from the mould (1).