PROCESS FOR MANUFACTURING A PLASTIC FUEL TANK EQUIPPED WITH A PUMP

摘要

Process for manufacturing a plastic fuel tank equipped with a pump, by moulding a tubular parison cut into two sheets with the aid of a mould comprising two cavities and a core, said process comprising the following steps:
1. the parison is introduced into the mould cavities;
2. the core is introduced inside the parison, said core having first been fitted with a swirl pot comprising a housing for the pump;
3. the mould is closed so that the cavities come into leaktight contact with the core;
4. the parison is pressed against the cavities by blowing through the core and/or applying a vacuum behind the cavities;
5. using a device firmly attached to the core, the swirl pot is fastened to the parison;
6. the mould is opened to withdraw the core;
7. the final moulding of the parison is carried out by blow moulding (by injecting a pressurized fluid inside the parison) and/or thermoforming (by applying a vacuum behind the cavities); and
8. the tank is demoulded and through an opening in the latter the pump is mounted in the housing of the swirl pot.
According to the invention, the mounting of the pump is achieved by way of an intermediate part, the external shape of which is standard and complementary to that of the housing, and the internal shape of which is adapted to the pump.