The present disclosure provides a filament winding device, which includes a helical winding device, a circumferential winding device, and a fixing device, a workpiece is clamped through the fixing device that drives the workpiece to rotate radially and move axially, the workpiece is performed helical winding through the helical winding device, and the workpiece is performed circumferential winding through the circumferential winding device.

A tool for forming a composite structure may include two or more segments formed from a polymer material. The tool may further include a crush insert disposed between the two or more segments. The tool may also include a support shaft coupled between the two or more segments. A method of forming a mandrel may include forming segments of the mandrel through an additive manufacturing process. The method may further include assembling the segments relative to one another. The method may also include positioning a crush insert between each of the segments. A method of fabricating a composite structure is also disclosed.

The invention relates to a method for manufacturing a fibre-reinforced pressure vessel having fibre-reinforced polar caps as well as a corresponding pressure vessel having these polar caps. Therein, the method comprises the steps of applying fibre composite material onto a provided winding body having the shape of the polar caps at at least one of the ends, using a winding process; of intermediately curing the fibre composite material for dimensional stabilisation, said fibre composite material, however, subsequently still remaining chemically active for later cross-linking; of severing the fibre composite material for producing a polar cap reinforcing layer which is detached from the winding body and placed onto a liner underlay of the pressure vessel. Subsequently, the polar cap reinforcing layer is cross-linked with the fibre composite material of the pressure vessel for producing the pressure vessel reinforcing layer.

Provided is a position detecting method for detecting a winding position of a reinforced fiber impregnated with resin when a plurality of hoop layers is formed in a cylindrical portion of a liner. The position detecting method includes: an imaging step of taking, by an imaging portion, a captured image of the reinforced fiber just after the reinforced fiber is wound around a hoop layer illuminated with oblique light by a lighting assembly, the imaging portion having an optical axis set at the same angle as an optical axis of the lighting assembly around a central axis of the liner; and a detecting step of detecting the winding position of the reinforced fiber based on the number of high intensity pixels or the number of low intensity pixels in each pixel column arranged in an axial direction of the liner in the binarized captured image.

A manufacturing method and a jig for a high-pressure tank includes a filament winding step in which a reinforcing shaft is inserted from a cap toward the other end of a liner, the axial length of the liner is fixed by the reinforcing shaft, and a fiber-reinforced resin is wound; and a thermal curing step in which the fixing of the reinforcing shaft to the other end of the liner is released so that the liner can change in the axial direction, and the fiber-reinforced resin is heated.

A cylindrical winding body is formed by winding continuous fibers impregnated with a first thermosetting resin in a circumferential direction, and the first thermosetting resin in the winding body is thermally cured. A pair of dome members is joined to both end portions of the cylinder member. A fiber bundle impregnated with a second thermosetting resin is helically wound around the joined member over the dome members, and the second thermosetting resin in the wound fiber bundle is thermally cured. A thermosetting resin containing a main agent and a granular solid curing agent is used as the first thermosetting resin, the main agent including a resin precursor and the solid curing agent chemically bonding molecules of the resin precursor together.

The present invention describes a method for producing a leak-tight vessel for holding a gas and/or liquid, comprising the steps of winding a heat-sealable thermoplastic barrier strip around a removable mandrel in such a way that each strip fragment overlaps with a substantially parallel strip fragment over at least a lateral overlapping distance, consolidating the overlapping strip fragments so as to form a gas and/or liquid tight layer, winding a fibrous material around the gas and/or liquid tight layer, thereby leaving an opening large enough for removing the mandrel. The invention also describes a leak-tight vessel produced in this way.

A filament winding device includes a fiber bundle retainer that temporarily retains fiber bundles. The fiber bundle retainer includes: a reel member including an outer peripheral portion having pins movable in the axial direction relative to the fiber bundles supplied through fiber bundle guides and rotatable about the axis of the liner, the reel member capable of winding the fiber bundles onto the outer peripheral portion; a first cutting unit configured to cut a part of each of the fiber bundles in the circumferential direction, the part being between a part of the fiber bundle wound on the outer peripheral portion and a part of the fiber bundle wound on the liner; and a second cutting unit different from the first cutting unit and configured to cut a part of each of the fiber bundles in the axial direction, the part being wound on the outer peripheral portion.

A filament winding device includes a supporter configured to support a liner in a rotatable manner; a yarn supplying unit configured to support bobbins; a helical winding head configured to helical-wind a fiber bundles onto the liner; and a standard thread guiding mechanism configured to form a standard thread guide channel that guides a standard thread from the bobbins to the liner, the standard thread being different from the fiber bundles and being connected to leading ends of the fiber bundles, the standard thread guiding mechanism including nozzles configured to blow the standard thread with a compressed gas, and guide tubes configured to guide the standard thread blown by the nozzles, and the nozzles and the guide tubes being disposed along a fiber bundle guide channel, and capable of taking up the standard thread from the standard thread guide channel to the fiber bundle guide channel.

A high-pressure tank, a manufacturing method for a high-pressure tank, and a manufacturing device for a high-pressure tank capable of simplifying a shape of a metal fitting and performing high-speed FW molding without causing an idle rotation of the metal fitting or a deformation of a liner, for example, when performing the high-speed FW molding are provided.

A high-pressure tank includes a liner, a reinforcing fiber layer, and a metal fitting. The reinforcing fiber layer is formed on an outer peripheral surface of the liner. The metal fitting is attached to the liner. The liner includes a liner main body and a protrusion part is provided in a part (cylindrical part) of the liner main body. The protrusion part is formed to protrude in a direction moving radially inward from the cylindrical part and to be fittable to a rotating shaft.