Method for fastening an accessory to a plastic fuel tank
AssigneeInergy Automotive Systems Research (Societe Anonyme)
InventorsHervé Lemoine, Frédéric Jannot
Life of this patent
Estimating the term…
Abstract
Method for fastening an accessory to a wall of a plastic fuel tank, this fastening taking place by snap-riveting using a tool at the same time as the tank is manufactured by molding, the accessory being, for this purpose, provided at at least one of its fastening points with an orifice through which the snap-riveting is carried out. According to the invention, a concave relief at least partially surrounds this orifice, the relief having a size and shape suitable for being able to cooperate with an excrescence of the tool during the snap-riveting.
Claims14
A method for fastening an accessory to a wall of a plastic fuel tank, comprising:
- fastening by snap-riveting using a tool, at the same time as said tank is manufactured by moulding with a mould, the accessory including at least one orifice through which the snap-riveting is carried out by material of the tank protruding from the orifice and being deformed to mould the rivet,
- wherein the snap-riveting orifice is at least partially surrounded by a concave relief that protrudes towards an inside of the tank into which a convex relief of the tool presses in order to force the material through the orifice, the convex relief of the tool comprising a counterform to mould an upper part of the rivet.
A method for fastening an accessory to a wall of a plastic fuel tank, comprising:
- fastening by snap-riveting using a tool, at the same time as said tank is manufactured by moulding with a mould, the accessory including at least one orifice through which the snap-riveting is carried out by material of the tank protruding from the orifice and being deformed to mould the rivet,
- wherein the snap-riveting orifice extends through a base portion of a concave relief formed in the accessory,
- wherein the concave relief is formed by the base portion and a wall portion that protrudes away from the base portion towards an inside of the tank,
- wherein an area of the base portion surrounds the orifice and faces towards the inside of the tank,
- wherein the wall portion at least partially surrounds the area of the base portion that surrounds the orifice such that the wall portion is spaced apart from the orifice by the area of the base portion that surrounds the orifice, and
- wherein a convex relief of the tool presses into the concave relief in order to force the material through the orifice, the convex relief of the tool comprising a counterform to mould an upper part of the rivet, which upper part contacts the area of the base portion that surrounds the orifice.
Dependencies are inferred from the claim text.