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Method for fastening an accessory in a plastic fuel tank

DC CAFC
  • US 9,399,327 B2
  • Filed: 11/04/2013
  • Issued: 07/26/2016
  • Est. Priority Date: 07/23/2004
  • Status: Active Grant
First Claim
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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, andwherein 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.

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