The invention relates to a closure system on a fuel tank (2) of thermoplastics with barrier properties for hydrocarbons. The closure system comprises at least one orifice (4), with a closure cap (5) which closes the orifice (4) in a sealing manner and which cooperates in a form-fitting manner with closure means provided at the circumference of the orifice (4) and encloses at least one first sealing means between it and a tank wall (3). The closure system (1) according to the invention is distinguished in that the tank wall is sealed in the region of the orifice (4) with at least one second sealing means, which covers and/or shields a part of the tank wall surfaces exposed to hydrocarbons.

A process for manufacturing a hollow body including a thermoplastic wall and a fibrous reinforcement welded on at least one portion of the surface of the wall, or its outer surface, the fibrous reinforcement including a thermoplastic similar to or compatible with that of the wall of the hollow body, having a thickness of at least 1 mm and from 30 to 60% in weight of fibers, the method including heating a portion of the outer surface of the hollow body where the reinforcement will be welded; heating the fibrous reinforcement to soften or melt the thermoplastic of the reinforcement; and moving the reinforcement and applying the reinforcement to the portion of the outer surface of the hollow body. The applying the reinforcement includes: applying an initial pressure on at least one portion of the reinforcement; and applying pressure for a final welding using robotized pressure applying mechanism.

A combined fluid tank used in diesel engine vehicles using AdBlue is provided, wherein the AdBlue is a urea-based chemical and the combined fluid tank is manufactured using a rotation technology from a polymer-based material. The combined fluid tank includes a first chamber for diesel and a second chamber for AdBlue positioned next to the first chamber, a double-walled impermeable chamber constructed between the first chamber and the second chamber, and a baffle located in at least one of the first chamber and the second chamber and the baffle provides sound and vibration damping, and to a production method of the combined fluid tank.

A pressure vessel for the storage of pressurized fluids for a fuel cell system, a liner for the pressurized vessel and a method of making. The method of manufacturing a pressure vessel includes forming a lost core assembly, a reinforcement structure around the assembly and removing the core from said assembly to define an internal compartment. The lost core assembly includes a first sacrificial material used to define the shape of the pressure vessel's internal compartment, boss attachable to the first material for the introduction and removal of the fluid into the pressure vessel, and a second material for placement around the first material and at least a portion of the boss such that upon removal of the first material, the second material defines the liner. The reinforcement structure is wound around the liner to give the pressure vessel a unitary, composite structure.

A filler neck assembly including a main channel for supplying a liquid into a tank and an auxiliary channel for evacuating gas from the tank. The main channel includes a tubular main body including a first end receiving a filler spout and a second end discharging the liquid into the tank. The auxiliary channel includes a first section and a second section, the first section being a channel integrally molded with the tubular main body, and the second section being formed by a feature on an exterior of the main body cooperating with a separately formed part.

A method for manufacturing an internal reinforcement for a motor vehicle tank, the internal reinforcement being designed to connect an upper wall and a lower wall of the tank, is provided. The method includes extruding material forming a so-called extruded portion of the internal reinforcement. An internal reinforcement for a motor vehicle tank obtained by this method is also provided.

A method for producing a plastic tank includes preparing a tank wall as a hot extrudate. A reinforcing sheet is then attached to at least one region of the outer layer of the hot extrudate. After introducing the attached reinforcing sheet and the hot extrudate into a shaping tool, the shaping tool performs shaping of the hot extrudate and the attached reinforcing sheet to form the tank wall, while simultaneously enhancing the attachment of the reinforcing sheet to the tank wall.

A method for manufacturing a fuel tank is described herein. The method includes subsequent to molding of a housing of a fuel tank, positioning a strut inside the housing. The method additionally includes snap-fitting a flexible projection of the strut with a corresponding flange section in a first wall of the housing, the flange section surrounding an opening in the first wall of the housing and the flexible projection including a surface overlapping an interior surface of the flange section subsequent to the snap-fitting.

A method for manufacturing a thermoplastic component for fuel systems or SCR systems includes the following steps: (1) molding and/or forming of a thermoplastic substrate from a first thermoplastic material, and (2) three-dimensional printing of a second thermoplastic material onto a first area of the thermoplastic substrate obtained after step (1). The first thermoplastic material of the thermoplastic substrate and the second thermoplastic material have a chemical compatibility.

The present invention relates to a curve-combined square pressure tank with which curves are combined so as to maintain internal high pressure, improve space efficiency, and reduce the weight thereof, and to a pressure tank, in which planes and curves are combined, formed by connecting flat plate members and curved members, having a plurality of aligned tension members for connecting the flat plate members facing each other, and having stress buffer parts formed at connection parts of the flat plate members and the curved members so as to enable internal pressure to be maintained.