Winding system for winding up concatenated hollow fibers onto a winding core

A winding system for winding concatenated hollow fibers onto a winding core, the system comprising:

• a. a winding core of a transfer device for the mass transfer and/or heat exchange between two media, the winding core being configured to have concatenated hollow fibers wound thereon and the winding core being configured to be inserted, together with the hollow fibers wound thereon, into a housing of the device and to remain therein, and
• b. at least one coupling element, wherein each of the at least one coupling element has first and second axially opposing connecting regions and is configured to be temporarily connectable, by means of the first connecting region, with the winding core for conjoint rotation therewith and is configured to be temporarily connectable by means of the second connecting region, with a drive for conjoint rotation therewith, the drive being configured to rotate the winding core about a winding axis, wherein
• the first connecting region of the coupling element comprises an expansion element configured so that the outer cross section thereof can be increased by expansion, and the winding core has in at least one axial end face a recess around the winding axis configured for insertion therein of the first connecting region of the coupling element of one of the at least one coupling element thereby to connect the winding core to the coupling element by means of expansion of the expansion element for conjoint rotation therewith, and
• the first connecting region of each of the at least one coupling element comprises a shank having a shank section around which a sleeve made of an elastic material is arranged as the expansion element, wherein the sleeve is configured to be changed in its size in radial direction as a result of axial movement of annular end faces of the sleeve towards each other through application of an axial force on the annular end faces of the sleeve.