Patent ID: 7641834

Claim:
A method for manufacturing a hollow fiber-composite component, the method comprising: a) cutting a two-dimensional reinforcing fiber material so as to form two planar blanks foldable to correspond to a shape and dimensions of the hollow fiber-composite component, each planar blank including a plurality of sections; b) stitching a section of each of the two planar blanks to each other in two dimensions so as to join the two planar blanks and to compact the fiber material in the stitched sections; c) folding the two blanks into a three-dimensional reinforcing fiber structure so as to form at least two hollow chambers disposed adjacent to each other and separated from each other by the stitched sections forming a divider between the two hollow chambers; d) disposing at least one expansion device in each of the at least two hollow chambers; e) stitching at least one closing seam in each of the two blanks so as to close each of the two hollow chambers and to create a preform; f) inserting the preform in an injection mould and closing the injection mould; g) expanding the expansion devices so as to apply the expansion devices to an inner circumference of the hollow chambers so as to press the preform against an inner contour of the injection mould; and h) injecting a resin into the injection mould between the inner contour of the mould and an outer circumference of the expansion devices and hardening the resin.