Method for fastening an accessory in a plastic fuel tank

摘要

Method for stake-fastening an accessory (4) into a plastic fuel tank, whereby:
the accessory (4) is equipped with at least one orifice (5) which passes right through the accessory (4);at least some of the plastic of which the wall of the tank (1) is made is melted; andsome of the molten plastic is forced through the orifice (5) of the accessory without becoming detached from the remainder of the molten plastic;the protruding molten plastic is given an appropriate shape (8) to obtain a self-formed plastic rivet, and is left to solidify;

the size and shape of the orifice (5) and/or of the solidified plastic (8) being such that the accessory (4) is mechanically fastened to the tank by at least some of the solidified plastic (8), the stake-fastening of the accessory (4) occurring at the time of manufacture of the tank (1) through the molding of a split or at least two-part parison.

主权项

1. A method for stake-fastening an accessory into a plastic fuel tank, wherein the accessory is equipped with at least one orifice which passes right through the accessory, said method comprising:
melting at least some of the plastic of which the wall of the tank is made to form molten plastic; forcing some of the molten plastic through the orifice of the accessory without becoming detached from the remainder of the molten plastic, thereby forming protruding molten plastic; shaping the protruding molten plastic to provide a self-formed plastic rivet, and allowing the molten plastic to solidify; whereby the size and shape of the orifice and/or of the solidified plastic are such that the accessory is mechanically fastened to the tank by at least some of the solidified plastic, and wherein stake-fastening the accessory into the tank occurs at the time of manufacture of the tank when moulding a split or at least two-part parison and wherein the accessory comprises a material selected from the group consisting of metal, polyacetal, polyoxymethylene, polyamide, glass-fibre-reinforced polyamide, and polybutylene terephthalate.