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US 6,367,503 B1Granted
Plastic container and method for using the same
AssigneeMannesmann VDO AG
InventorsDieter Keller, Martin Maasz, Karl Eck, Christian Kochsmeier
Life of this patent
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AssigneeMannesmann VDO AG
InventorsDieter Keller, Martin Maasz, Karl Eck, Christian Kochsmeier
Estimating the term…
A plastic tank comprises a line which is connected at least in certain sections to its wall and is formed in one piece with the plastic tank. For its production, the plastic tank is injection-moulded between a hollow mould and an inner mould inserted into the latter, the mould having a recess, in which a sprue body is formed as the starting material for the line. Before this sprue body can solidify completely, material is blown out from it by means of the internal gas pressure or pressure blowing technique via channels provided in the mould, so that the required line is created there. The lines may be arranged on the outside and/or inside and parallel and/or at an angle to the tank walls.
Plastic tank, in particular a fuel tank of a motor vehicle for holding fuel, having a media-carrying line connected at least in certain sections to its wall, characterized in that at least one section of the media-carrying line is moulded directly onto a wall of the plastic tank by injection moulding.
Plastic tank, in particular a fuel tank of a motor vehicle, having a media-carrying line connected at least in certain sections to its wall, characterized in that at least one section of the media-carrying line is moulded directly onto a wall of the plastic tank by injection moulding and a connecting element is moulded on the media-carrying line, the connecting element further having a plug to be positively connected to a coupling.
Process for the production of a plastic tank, in particular a fuel tank for a motor vehicle, which tank comprises at least one media-carrying line, characterized in that the plastic tank is made from at least two shells respectively produced by the injection-moulding process by means of a hollow mould and an inner mould engaging in the latter and designed as a core, a shaping of the mould having the effect that on an inside and/or outside wall of at least one of the shells at least one sprue body is moulded on, and in that subsequently a hollow space, forming the line, is formed in the sprue body by means of the internal gas pressure technique, in that a pressurized gas is fed into the mould via at least one channel, core material of the sprue body is blown out and is carried away with the gas, and subsequently the shells are connected to each other in a sealed manner.
Dependencies are inferred from the claim text.