A process for post curing a composite product made from a filament winding process comprises the steps of: surrounding the composite product, that is disposed about a rotatable mandrel, with an outer jacket; and simultaneously rotating and heating the mandrel resulting in post curing of the composite product according to a process that can be referred to as being a combo-semi-centrifugal post curing process.

Provided are a method for manufacturing a structural body and a structural body, the structural body formed of FRP and having a high degree of freedom in cross-sectional shape even at a low cost. The method for manufacturing a structural body includes a winding step of forming a cylindrical laminate body LM by winding a plurality of composite materials including reinforcing fibers and an uncured thermosetting resin around a hollow cylindrical core member CY; a compressing step of winding a tape or film around an outer circumference of the laminate body LM and compressing the same; a preheating step of heating the laminate body LM until a state prior to complete curing of the thermosetting resin; and a main heating step of arranging the laminate body LM around which the tape or film is wound and the cylindrical core member in a molding die and pressing the same to thereby heat the laminate body LM until the thermosetting resin is completely cured while deforming the cylindrical core member CY to a non-circular cross-sectional shape. Thereby, a structural body in which the cylindrical core member CY and the laminate body LM are integrated can be formed.

Multi-ply, hybrid composite materials useful in the formation of thin walled, hollow, tubular articles having improved resistance to hoop stress. Two different, single-ply pre-pregs are impregnated with binders and laminated together with the fibers of the layers oriented at a bias relative to each other. The hybrid composite is rolled into a tubular article having excellent strength uniformity along the full length of the tubular article.

A manufacturing method for a tank is a method of manufacturing the tank by winding fibers impregnated with an epoxy resin in a plurality of layers around an outer circumference of a liner having a body part and dome parts provided at both ends of the body part. The manufacturing method includes sequentially laminating a plurality of hoop layers by hoop-winding the fibers from a side closer to an outer circumference of the body part toward a side farther from the outer circumference of the body part. When laminating the hoop layers, a temperature of end portions of the body part adjacent to the dome parts is set lower than a temperature of a remaining portion of the body part, the remaining portion being a portion of the body part other than the end portions.

The invention relates to a method and a device for manufacturing a pipe shell from an insulating material by means of which the cycle times can be further reduced while the quality of the pipe shell is simultaneously improved, by at least one web (29) of the insulating material which is provided with a binding agent being wound around a core (19) by means of at least two opposing belts (12, 13) which wrap around the core (19) partially. The method steps are characterized in that the at least one wound-up web (32) of insulating material is removed in a radial direction of the core (19) which is, however, not opposite to the direction in which the at least one web (29) of insulating material was fed by the one belt (12), especially by the wound-up web (32) being discharged through the same belt (12).

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 process for post curing a composite product made from a filament winding process comprises the steps of: surrounding the composite product, that is disposed about a rotatable mandrel, with an outer jacket; and simultaneously rotating and heating the mandrel resulting in post curing of the composite product according to a process that can be referred to as being a combo-semi-centrifugal post curing process.

A manufacturing method for a high-pressure tank is a manufacturing method for a high-pressure tank including a reinforced layer formed such that an electrically conductive fiber bundle impregnated with thermosetting resin is wound around a liner. The manufacturing method includes: a step of preparing the tank in which the uncured reinforced layer is formed on the liner; a first heating step of heating the uncured reinforced layer by low-frequency induction heating so the thermosetting resin is softened; and a second heating step of, after the first heating step, heating the softened reinforced layer by high-frequency induction heating so that the softened reinforced layer is hardened.

There is provided a flexible, helically wound conduit for a breathing circuit comprising an inlet 1, an outlet 3, and an enclosing wall 2 defining a flow passage between said inlet and said outlet, wherein at least a region of said enclosing wall is permeable to water vapor and one or more of O.sub.2 and CO.sub.2, and wherein the axial tensile strength of the enclosing wall is greater than 40N. Further provided are limbs comprising the conduit, a method of manufacturing the conduit and the use of the conduit to remove water vapor and/or CO.sub.2 from gas exhaled by a patient.