A filament winding device includes: a supporting unit that supports a mandrel on which a plurality of fiber bundles impregnated with a resin are wound, the supporting unit movable in the axial direction of the mandrel; and a helical unit having a plurality of fiber bundle guide units arranged radially in the circumferential direction of the mandrel and guide the corresponding plurality of fiber bundles to the mandrel, the helical unit supplying the plurality of fiber bundles to the mandrel through the fiber bundle guide units. Each of the fiber bundle guide units has a pressing roller for pressing a fiber bundle supplied to the mandrel, against the circumferential surface moving in the axial direction. The pressing roller can come into the contact with the circumferential surface of the mandrel and be rotationally driven about a roller axis extending in a roller axis direction perpendicular to the axial direction.

A method for manufacturing a waterproof felt duct may include (a) laminating a waterproof film on one side of a first nonwoven fabric and laminating a second nonwoven fabric on the waterproof film laminated on the first nonwoven fabric to form a laminated body; (b) forming a waterproof felt base material by thermally adhering the laminated body; (c) cutting the waterproof felt base material into a desired shape; (d) molding a duct while surrounding the waterproof felt base material cut into the desired shape around the external surface of a molding jig having a worm gear shape; (e) heat-treating the molded duct; (f) cooling the heat-treated duct; and (g) ejecting the cooled duct from the molding jig.

The disclosure relates to assemblies of thin-walled tubes and mandrels for use in thin wall catheter liners. For example, an assembly is provided that includes a thin-walled PTFE tube comprising walls with a thickness of less than 0.004 inches, positioned over a filled mandrel comprising PTFE with one or more fillers incorporated therein. The disclosure further provides, independently, thin-walled tubes and filled mandrels, as well as methods of making and using such components.

The disclosure relates to assemblies of thin-walled tubes and mandrels for use in thin wall catheter liners. For example, an assembly is provided that includes a thin-walled PTFE tube comprising walls with a thickness of less than 0.004 inches, positioned over a filled mandrel comprising PTFE with one or more fillers incorporated therein. The disclosure further provides, independently, thin-walled tubes and filled mandrels, as well as methods of making and using such components.

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 manufacturing method for a high pressure tank, includes preparing a liner, and forming a helical layer by helical-winding fiber bundles around the liner, wherein a plurality of layers included in the helical layer include: base turnback layers formed by winding the fiber bundles while a base section of each of caps projecting outward of the liner is used as a winding turnback position where the fiber bundles are turned back in the axial direction; and distant turnback layers formed by winding the fiber bundles while a distant position distant from each base section is used as the winding turnback position, and in the distant turnback layers, the helical-winding is performed such that gaps are generated between adjacent fiber bundles of the fiber bundles.

A manufacturing method for a high pressure tank, includes preparing a liner, and forming a helical layer by helical-winding fiber bundles around the liner, wherein a plurality of layers included in the helical layer include: base turnback layers formed by winding the fiber bundles while a base section of each of caps projecting outward of the liner is used as a winding turnback position where the fiber bundles are turned back in the axial direction; and distant turnback layers formed by winding the fiber bundles while a distant position distant from each base section is used as the winding turnback position, and in the distant turnback layers, the helical-winding is performed such that gaps are generated between adjacent fiber bundles of the fiber bundles.

A method of manufacturing a tank includes: a winding step of winding a fiber impregnated with thermosetting resin before curing on a liner; a shape changing step of making the shape of the liner larger than the shape thereof at the time of the winding step, the shape changing step being performed after the winding step; and a curing step of heating and curing the thermosetting resin while the shape of the liner is increased by the shape changing step.

A method of manufacturing a coupler for an air suspension includes: preparing a topping cord sheet and a rubber band; connecting the topping cord sheet and the rubber band to each other by attaching the rubber band to an outer circumferential surface of the topping cord sheet; and vulcanizing an intermediately formed body made by the connecting of the topping cord sheet and the rubber band to each other.

A manufacturing method for manufacturing a reinforced layer constituting a high-pressure tank includes: a first forming step of forming a cylindrical pipe portion and extending in an axial direction of the high-pressure tank, the pipe portion including a first end portion including a first end and a second end portion including a second end, the pipe portion being formed to have a first stepped portion such that the first stepped portion projects outwardly at a position distanced from the first end in the axial direction by a first distance; a first placing step of placing the first end inside a first dome portion by moving at least either of the first dome portion and the pipe portion until a first bottom end portion of the first dome portion abuts with the first stepped portion; and a first joining step of joining the pipe portion to the first dome portion.