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AssigneeKautex Textron GmbH & Co. KG
InventorsMarkus Hutzen, Ulrich Karsch, Christoph Mehren
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The invention relates to an extrusion-blow-molded fuel tank (1) of thermoplastic material comprising a tank wall of a composite of various layers obtained in various production operations, at least one first layer comprising at least one shell-shaped supporting shell (8) and a second layer of a thermoplastic material forming an adhesive bond with the supporting shell (8), and the supporting shell (8) having a greater strength than the second layer. The supporting shell (8) forms an inner layer of the tank and the second layer forms an outer skin of the tank, two supporting shells within the tank forming a supporting cage or a supporting housing.
An extrusion-blow-molded fuel tank of thermoplastic material comprising a tank wall of a composite of various layers obtained in various production operations, at least one first layer comprising at least one shell-shaped supporting shell and a second layer of a thermoplastic material forming an adhesive bond with the supporting shell, and the supporting shell having a greater strength than the second layer, characterized in that the supporting shell forms an inner layer of the tank and the second layer forms an outer skin of the tank.
A method for producing a fuel tank, comprising the molding of two shell-shaped semifinished products of thermoplastic material in a multi-part tool forming a mold impression, and the joining of the shells to form an essentially closed hollow body, the method comprising first introducing at least one molten, plastic preform into the mold impression and at least partially molding the preform against the mold and then introducing at least one self-supportingly stiff supporting shell into the mold impression, the supporting shell being connected to the already at least partially molded preform to form an inner layer and the shells of the tank thus obtained being joined together in a further method step.
Dependencies are inferred from the claim text.