Winding system for winding connected hollow fibers onto a winding core - Patents.com

Abstract

The present invention relates to a winding system for winding connected hollow fibers, in particular material- and / or energy-transparent hollow fibers, onto a winding core (1), comprising a winding core (1) of an exchange device for material and / or heat exchange between two media, in particular an oxygenator and / or a heat exchanger, on which the connected hollow fibers can be wound, the winding core being adapted and particularly designed to be inserted into the housing of the device together with the hollow fibers wound thereon and to remain therein, the winding core comprising at least one connecting element (2), preferably two connecting elements (2), each of which has two axially opposite connecting regions (2a, 2b), the first connecting region (2a) temporarily connecting the first hollow fibers to the winding core. the winding core (1) is non-rotatably connectable with the connecting element (2) by means of a second connecting region (2b), and is non-rotatably connectable with a drive unit by means of which the winding core (1) can be rotated around the winding axis (A); the first connecting region (2a) of the connecting element (2) has an expansion element (2d), in particular the outer cross section of which can be expanded by expansion; the winding core (1) has, on at least one axial end face, preferably both axial end faces, a recess (1a) arranged around the winding axis (A), into which the first connecting region (2a) of the connecting element (2) can be inserted; and the winding core (1) can be non-rotatably connected with the connecting element (2) by expansion of the expansion element (2d).

Description

[Technical field]

[0001] The present invention relates to a winding system for carrying out the winding of connected hollow fibres, in particular material- and / or energy-transparent hollow fibres, onto a winding core. [Background technology]

[0002] In the prior art it is known to wind material- or energy-permeable hollow fibres, in particular fibres combined with warp threads to form a mat, on a core in order to use the wound hollow fibre packets in exchange devices for the material and / or energy exchange between two media, in particular oxygenators and / or heat exchangers, as shown, for example, in EP-A-0 089 122 and EP-A-0 285 812.

[0003] For this purpose, the wound hollow fiber packet is inserted into the housing of the exchange device and then the hollow fiber ends are glued to each other and to the housing, which is also called potting. After opening of the hollow fiber ends in the housing, i.e. after removing the adhesive on the end side, the two media can then be guided separately by the hollow fiber walls, i.e. one medium, e.g. blood, is guided on the outside of the hollow fiber and the other medium, e.g. gas or gas mixture or temperature-conditioned fluid, can be guided through the hollow fiber.

[0004] Through the hollow fibers, in particular through the semi-permeable hollow fibers, exchange can then take place, for example between oxygen and carbon dioxide in an artificial lung. Such wound hollow fiber packets can also be used in mass exchange devices for dialysis purposes or for carbon monoxide removal. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] European Patent Application Publication No. 0089122 [Patent Document 2] European Patent Application Publication No. 0285812 Summary of the Invention [Problem to be solved by the invention]

[0006] The winding of hollow fibers onto a core and the integration of the produced windings into a changer are complex processes that should be simplified by the present invention. In particular, another object of the present invention is to simplify and form the winding such that the winding core utilized for the winding can, on the one hand, be easily adapted to a drive that allows winding by a motor and, on the other hand, can be used directly in the changer. In particular, the object is to form an adaptation of the winding core to the drive such that a rapid adaptation and non-residue removal of the adaptation are possible. [Means for solving the problem]

[0007] The object of the present invention is to provide a winding system for carrying out the winding of connected hollow fibers, in particular substance- and / or energy-transparent hollow fibers, onto a winding core, which comprises a winding core of an exchange device for substance and / or heat exchange between two media, in particular an oxygenator and / or a heat exchanger, onto which the connected hollow fibers can be wound, which winding core is provided and in particular designed to be inserted into a housing of the device together with the hollow fibers wound onto it and to remain in the housing, and furthermore has at least one connecting element, preferably two connecting elements, which at least one connecting element has two axially opposed connecting regions, a first connecting element having a first connecting element and a second connecting element having a second connecting element and a second connecting element having a second connecting element and a second connecting element having a second connecting element and a second connecting element having a second connecting element and a second connecting element having a second connecting element and a second connecting element having a second connecting element and a second connecting element and a third connecting element having a second connecting element and a second connecting element and a third connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fourth connecting element and a fifth ... The problem is solved by a winding system characterized in that the winding core can be temporarily connected to the winding axis by a first connecting region and can be non-rotatably connected to a drive device by a second connecting region, by which the winding core can be rotated around the winding axis by means of the drive device, the first connecting region of the connecting element has an expansion element, in particular an outer cross section of the expansion element can be expanded by expansion, the winding core has on at least one axial end face, preferably both axial end faces, a recess arranged around the winding axis, into which the first connecting region of the connecting element can be inserted, and by expanding the expansion element the winding core can be non-rotatably connected to the connecting element.

[0008] The core idea of ​​the winding system is therefore based on the fact that the winding core utilized by the winding system can be used as a carrier for the hollow fibers directly in the housing of an exchange apparatus, e.g. a mass exchange apparatus, after winding of the hollow fibers or hollow fiber mat, and for winding, in particular winding on a motor, the winding core can be simply and quickly coupled to a drive.

[0009] For this purpose, the winding system according to the invention utilizes a connecting element or preferably two connecting elements facing each other on a common axis of rotation around the winding core, by means of which the adaptation to the drive is effected, the rotationally non-fixing between the winding core and the connecting elements being effected by the spreading of the respective connecting element at a first coupling region facing towards or cooperating with the winding core.

[0010] Such spreading can take place, for example, between two spreading positions, in one of which the connection between the connecting element and the winding core is released and in the other spreading position a non-rotatable connection is achieved, so that a drive device connected to the second connection region of the connecting element can rotate the winding core and wind the guided hollow fiber mat around it.

[0011] It should be noted that, insofar as the winding core and the connecting elements are described further below, the explanations are also valid if one connecting element each can be fixed to the winding core at both opposing axial end faces, which is in any case the preferred embodiment, in which case the explanations given for the winding core apply in particular with respect to both end faces and each of the available connecting elements, which can be formed identically.

[0012] An expansion connection between the winding core and the connecting element has the advantage that the connection takes place without the two elements to be connected being moved axially, i.e. translationally or rotationally relative to one another when the connection is formed.

[0013] Rather, during expansion coupling, the cooperating contact surfaces preferably approach one another and come into contact with one another due to the expansion of the expansion elements, so that a frictional and / or force coupling is achieved.

[0014] In that respect, it is advantageous over other types of connection, since it prevents wear of the material between the two connection partners, which can occur between them, for example, when screwing a connecting element onto a winding core. Such potential wear is introduced into the mass exchange apparatus by the use of a winding core in the mass exchange apparatus, and can have negative effects if it is allowed to reach the patient's blood circuit. Furthermore, the expansion connection according to the invention offers the advantage that it can be manufactured by injection molding techniques.

[0015] A winding core used in a winding system, which is inserted into the housing of the exchange device after winding and which remains in the housing for operation, can be configured for this use, for example, by being perfectly adapted to the housing in terms of shape and / or dimensions, in order to be inserted into the housing without any modification other than the removal of a connecting element or elements. Furthermore, the winding core can preferably also be provided for this purpose with at least one passage in the winding core, via which the medium can be guided later during operation.

[0016] The setting or suitability of the winding core for this purpose may also consist in a configuration that is considered to be further advantageous in that the recesses (in particular both recesses) in the winding core for receiving the connecting element are constituted by a passage that passes at least regionally through the winding core and through which the medium, in particular blood, can flow after insertion of the winding core into the housing of the mass exchange apparatus. Such a passage thus has a double function, i.e. both in the winding system for fixing the connecting element and in the subsequent mass exchange apparatus for transporting the medium.

[0017] The passage can pass completely through the winding core, for example in the axial direction, so that in particular two connecting elements can be attached on both sides of the winding core. In the case of two recesses for accommodating connecting elements, one can only be constituted by a passage used for media transport, which in particular is not guided completely axially through the winding core.

[0018] The passage can lead, on one side, to a recess for fixing the connecting element and, on the other end, to one or more openings in the side of the winding core, especially if the passage does not pass completely axially through the winding core.

[0019] The continuous passageway may also include a branch leading to the outer surface of the winding core.

[0020] By means of the lateral openings of the winding core it can be achieved that in subsequent operation a medium, for example blood, can penetrate through these openings into the wound hollow fiber packet, preferably with a radial inflow component.

[0021] It may furthermore be provided that the (respective) recess in the winding core for accommodating the connecting element is surrounded by a passageway which extends at least in an area coaxially to the recess and through which the medium, in particular blood, can flow after insertion of the winding core into the housing of the mass exchange apparatus. For such coaxial passageways, the above-mentioned configurations may be applied in the same way, i.e. in particular the passageway may open into the side of the winding core or may have a branch opening into the side.

[0022] Without relying on these possibilities of obtaining the suitability of the winding core for the mass exchange apparatus, the invention may provide that at least one connecting element comprises in the first connecting region a shaft part which is axially divided into at least two axially parallel, side-by-side situated shaft parts, between which a wedge element is arranged as a spreading element, which is axially movable between the shaft parts, so that when an axial movement of the wedge element takes place between the shaft parts, the shaft parts are moved radially outwards.

[0023] Preferably, the shaft member comprises at least three shaft portions. The wedge elements can preferably be formed conically or cone-shaped. During axial movement, for spreading, the wedge elements can preferably be displaceable from the first connecting region in the direction of the second connecting region. To apply a moving force to the wedge elements, the wedge elements can be guided, for example, into or out of the second connecting region via a hollow region of the shaft member.

[0024] In another configuration, it can be provided that at least one connecting element comprises, in the first connecting region, an axial member having a shaft, around which a sleeve made of elastic material, in particular an elastomer, preferably a vulcanizate of silicone rubber or natural rubber, is arranged as an expansion element, the sleeve being radially variable in size by axially moving its end faces relative to one another, in particular by applying an axial force to the ring-shaped end faces of the sleeve, in particular when the sleeve is in a relaxed or unforced state in the non-connected state between the connecting element and the winding core, and an axial force is applied for the connection, which axial force moves the axial end faces of the sleeve towards one another, whereby the sleeve radially thickens.

[0025] In a possible configuration, it can be provided that the sleeve rests with a first end of both axial ends against a first force application surface that is stationary relative to the axial region of the connecting element, and with a second axial end against a second force application surface of the connecting element, the second force application surface being movable in the axial direction of the sleeve relative to the first force application surface, preferably by means of an operating element provided on the connecting element, in particular on the axial member. The stationary first force application surface can be arranged at the free end of the first coupling region that is inserted into a recess of the winding core. The outer cross section / outer diameter of the force application surface is preferably equal to or larger than the diameter of the relaxed sleeve at the axial end and equal to or smaller than the inner cross section / inner diameter of the recess in the winding core.

[0026] Regardless of the type of expansion, the present invention may preferably contemplate that in the expanded state, the position of the connecting element is axially fixable relative to the winding core and preferably also axially fixable relative to an auxiliary element separate from the core, which can be attached to one axial end face of the winding core beyond the connecting element after inserting the first connecting region of the connecting element into the recess of the winding core.

[0027] The use of an auxiliary element for fixing the connecting element in the recess of the winding core can have several advantages.

[0028] For example, the auxiliary elements can be formed by disks which, in terms of cross section / diameter, protrude radially from the winding core, and such disks can preferably be used to position, in particular center, the hollow fiber mat relative to the winding core during winding, in particular if connecting elements are fixed on both sides of the winding core by respective disks, so that the hollow fiber mat to be wound is located between the disks during winding.

[0029] Furthermore, the auxiliary element constitutes a second force application surface for the sleeve, which is capable of contacting a second axial end of the sleeve, in particular with the end of the sleeve facing towards the second connecting region of the connecting element, which second end of the sleeve facing towards the second connecting region of the connecting element protrudes from the axial end face of the winding core when inserted into the winding core of the connecting element, and force application to the sleeve is realizable by mounting the auxiliary element, in particular such that the second end of the sleeve is movable in the direction of the first end of the sleeve.

[0030] Similarly, it can be provided that the second end of the sleeve, facing the second connecting region of the connecting element, when inserted into the winding core of the connecting element, is located below or in the plane of the axial end face of the winding core, and that application of force after attachment of the auxiliary element can be achieved by axial movement of the connecting element, in particular by movement outward from the winding core, in particular such that the first end of the sleeve can be moved in the direction of the second end of the sleeve.

[0031] In both cases, the cooperation of the axial end faces of the sleeve with the auxiliary elements or disks results in a movement of the two end faces of the sleeve towards each other, which in turn results in a radial thickening of the sleeve.

[0032] Regardless of the type of configuration of the expansion element, the present invention may contemplate that the position of the connecting element can be fixed axially, for example, by a fixing ring which can be inserted into an annular groove of the connecting element, and by means of which the connecting element can be supported on the surface of the auxiliary element.

[0033] This annular groove can preferably be located between the two connecting regions of the connecting element, in particular within a partial piece of the connecting element, which partial piece transitions into a region which has or constitutes the expansion element, i.e. preferably into an axial region which supports the sleeve or transitions into a wedge element.

[0034] Furthermore, in all possible configurations, the connecting element is provided with an operating element, by means of which the opening of the first connection region and / or the axial fixing of the connecting element can be realized, in particular the operating element being supported on an auxiliary element or on an element with a second force application surface or on a support element arranged on the connecting element.

[0035] In this case, the operating element can be formed, for example, as a nut on a thread of the connecting element, which is connected to the spreading element, and the thread can, for example, transition into a shaft region which supports a sleeve or transitions into a wedge element.

[0036] The operating element can be configured as an eccentric body movable by a lever, rotatable about an axis and supported on the connecting element or auxiliary element, the part with the axis transitioning into an axis region supporting the sleeve or transitioning into the wedge element, such that by eccentric movement the axis can be moved in the connecting region and the spreading element can be operated, in particular the sleeve can be compressed or the wedge element can be moved axially.

[0037] An embodiment of the invention will now be explained in more detail with reference to the drawings. [Brief description of the drawings]

[0038] [Figure 1] Overview of the winding system components [Diagram 2] Cross-section of the assembled winding system in two states [Diagram 3] FIG. 2 corresponds to FIG. 1, showing a winding system of another configuration. [Figure 4] Alternative configurations for fastening the connecting element 2 [Diagram 5] Possible forms that can be selected independently of the possible forms of expansion DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] FIG. 1 shows an overview of the components of the winding system.

[0040] The winding system comprises a winding core 1, on which hollow fibres or a hollow fibre mat (not shown) can be wound. The winding core 1 has a central recess 1a, preferably on its opposite end faces, arranged about the winding axis A and preferably extending from each end face into the winding core. The recess is constituted by a passage in the winding core. The recess 1a is further coaxially surrounded by a passage 1b, in particular having a radial brace between the walls of both passages 1a, 1b. Such an arrangement is not essential.

[0041] A connecting element 2 can be inserted into the recess 1a, which is here formed with a circular cross section. This connecting element has a first connecting area 2a, which fits into the recess 1a, and a second connecting area 2b, which is provided for connecting with a drive, not shown in detail here, and which is thus designed for a rotationally non-reversible connection with the drive, for example with a coupling of the drive.

[0042] The connecting element 2 further comprises an axial region 2c around which a sleeve 2d made of elastomer, for example silicone, is arranged as an expansion element. At the free end of the first connecting region 2a, the sleeve abuts with a first axial end 2d1 against a force application surface 2e of the connecting element. A second axial end 2d2 of the sleeve 2d is free. By axial compression of the sleeve 2d, i.e. by applying a force which moves the axial ends 2d1, 2d2 towards each other, the sleeve 2d can be radially enlarged.

[0043] The winding system may furthermore comprise a holding element 3 which may be formed as a disk 3. This disk has an inner opening 3a which can be guided over the second connecting region 2b of the connecting element 2. The outer shape of the disk 3 is larger than the outer shape of the winding core 1.

[0044] The winding system comprises, in a possible configuration, a fixing ring 4 which can be inserted into an annular groove 2f between the coupling areas 2a and 2b of the connecting element 2.

[0045] On the right of Figure 1 the assembled winding system is shown after the connecting element 2 has been inserted into the recess 1a of the winding core 1 and the disk 3 has been guided over the connecting element 2 and resting on the end face of the winding core 1.

[0046] FIG. 2 shows, in cross section, the assembled winding system in two states.

[0047] On the left of Fig. 2, it can be seen that the connecting element 2 is inserted into the recess 1a of the winding core 1 without the expansion element 2d, i.e. without the sleeve 2d being expanded or enlarged. The disk 3 rests on the end face of the winding core 1 and can preferably already come into contact with the second axial end face 2d2 of the sleeve 2d in the untensioned state. The second axial end 2d2 of the sleeve is therefore located in the plane of the end face of the winding core. The second axial end 2d2 of the sleeve can alternatively also be located below the plane of the end face of the winding core and is initially not in contact with the auxiliary element.

[0048] The annular groove 2 f of the connecting element 2 is located below the surface of the disk 3 and is not accessible to the fixing ring 4 .

[0049] The bonding area 2a is located completely, but unbonded, within the winding core 1. The bonding area 2b is located outside the winding core 1 and is accessible for connection to a drive device, not shown.

[0050] To fix the connecting element 2 in the winding core 1, the sleeve is expanded, which is done by pulling the connecting element out of the recess area-wise, at least until the annular groove on the disk 3 becomes accessible. This causes the force application surface 2e to move towards the disk 3. As the sleeve 2d is trapped between the force application surface 2e and the disk 3, the movement of the force application surface 2e causes the sleeve 2d to be compressed in the axial direction and thus to thicken. The lateral surface of the sleeve 2d is thereby pressed against the inner surface of the recess 1a, which generates a frictional engagement with a radially acting force F1 according to the right diagram of FIG. 2.

[0051] 2, the connecting element 2 cannot move back into the recess 1a again, since the fixing ring 4 has been inserted, so that the force F1 continues to act statically and the connecting element is fixed in the recess 1a of the winding core 1.

[0052] Furthermore, a force F2 acts, which is caused by the sleeve 2d pulling the connecting element 2 back into the recess 1a due to its axial compression, which is not possible due to the support of the fixing ring 4 on the disk 3. The force F2 therefore acts via the fixing ring 4 on the disk 3 and presses this disk additionally against the end face of the winding core 1.

[0053] In the expanded state in the right part of FIG. 2, the winding core 1 can be coupled on both sides with a drive device for winding at least one hollow fiber mat onto the winding core.

[0054] After that has been done, the winding core can be separated from the drive, the fixing rings 4 can be pulled out of the respective connecting elements, and the connecting elements together with the disks 3 can be removed from the winding core 1 .

[0055] The winding core with the supported hollow fibers can then be inserted into the housing of the exchange device, thereby potting the hollow fibers. Passages 1a and / or 1b in the winding core are preferably available for transporting a medium, such as blood, through the winding core.

[0056] Figure 3 shows on the right hand side an arrangement in which, in the non-expanded state, the sleeve 2d projects with its axial end 2d2 from the end face of the winding core 1 after insertion of the connecting element 2 on the winding core 1, and thus the sleeve is compressed in the axial direction by the attachment of the disk 3 as an auxiliary element, which causes it to thicken and thus to produce a frictionally engaging connection. On the left hand side of Figure 3, the axial fixing by the fixing ring 4 in the position thus obtained is shown, as on the right hand side of Figure 2. Figure 3 otherwise corresponds to the arrangement of Figure 2.

[0057] FIG. 4 shows an alternative configuration for effecting the fastening of the connecting element 2.

[0058] Between the connection area 2b for connection with the drive and the axial end 2d2 of the sleeve 2d, the connecting element 2 has an external thread onto which a ring 5 or nut 5 with a corresponding internal thread can be screwed after the disk 3 has been placed on the end face of the winding core 1 beyond the connection area 2b. After the ring 5 comes into contact with the disk 3 during screwing, it regionally pulls the connecting element 2 axially out of the winding core, so that the sleeve 2d, which rests on the disk 3 with its axial end 2d2 thereon, is compressed axially and expanded / thickened radially. This results in a frictionally engaging connection. On the right of FIG. 4, the unexpanded state is shown, and on the left, the expanded state.

[0059] Fig. 5 shows possible configurations that can be selected regardless of the possible type of expansion. Exemplarily, an expansion as in Fig. 2 is shown. With reference to Fig. 5, the upper recess in the winding core 1 is formed as a channel 6, which starts from the upper end face of the winding core 1 and extends into the winding core and branches into a channel part 6a which leads to the side of the winding core 1. In this way, the medium guided through this channel from the radial inside can flow to the hollow fibres. On the left of Fig. 5, the connecting element 2 is expanded, on the right it is not expanded. In addition, the present application relates to the invention described in the claims, but may also include the following as other aspects. 1. A winding system for carrying out the winding of connected hollow fibres, in particular material- and / or energy-transparent hollow fibres, onto a winding core (1), comprising: a. an exchange device for the exchange of substances and / or heat between two media, in particular an oxygenator and / or a heat exchanger, having a winding core (1) on which the connected hollow fibers can be wound, the winding core being provided and especially designed to be inserted into the housing of the device together with the hollow fibers wound on the winding core and to remain in the housing, b. at least one connecting element (2), preferably two connecting elements (2), each of which has two axially opposed connecting regions (2a, 2b) and can be temporarily connected to the winding core (1) in a non-rotatable manner by the first connecting region (2a) and can be connected to a drive device in a non-rotatable manner by the second connecting region (2b), by means of which the winding core (1) can be rotated around the winding axis (A); c. the first connecting region (2a) of the connecting element (2) has an expansion element (2d), in particular the outer cross section of the expansion element can be expanded by expansion, the winding core (1) has at least one axial end face, preferably both axial end faces, a recess (1a) arranged around the winding axis (A), into which the first connecting region (2a) of the connecting element (2) can be inserted, and the winding core (1) can be non-rotatably connected to the connecting element (2) by expansion of the expansion element (2d); A wrapping system comprising: 2. 2. The winding system according to claim 1, characterized in that at least one connecting element (2) comprises in the first connecting region (2a) an axial member which is divided in the axial direction into at least two axially parallel axial portions which are positioned next to each other and between which a wedge element which is axially movable between the axial portions is arranged as an expansion element. 3. 11. The winding system according to claim 1, characterized in that at least one connecting element (2) comprises, in the first connecting region, an axial member having an axial portion (2c), around which a sleeve (2d) made of an elastic material, in particular an elastomer, preferably a vulcanizate of silicone rubber or natural rubber, is arranged as an expansion element, the sleeve (2d) being radially changeable in size by axially moving its end faces (2d1, 2d2) relative to one another, in particular by applying an axial force to the ring-shaped end faces (2d1, 2d2) of the sleeve (2d). 4. 5. The winding system according to claim 3, characterized in that the sleeve (2d) bears with a first end (2d1) of its two axial ends (2d1, 2d2) against a first force application surface (2e) which is stationary relative to the axial region (2c) of the connecting element (2), and the sleeve (2d) bears with a second axial end (2d2) against a second force application surface of the connecting element (2), the second force application surface being movable in the axial direction of the sleeve (2d) relative to the first force application surface (2e), preferably by means of an operating element provided on the connecting element (2), in particular on the axial member. 5. 5. The winding system according to any one of claims 1 to 4, characterized in that in the expanded state, the position of the connecting element (2) can be axially fixed relative to the winding core (1) and to an auxiliary element (3) separate from the winding core (1) and which can be attached to one axial end face of the winding core (1) beyond the connecting element (2) after the first bonding region (2a) of the connecting element (2) is inserted into the recess (1a) of the winding core (1). 6. 6. The winding system according to claim 5, characterized in that the auxiliary element (3) is formed by a disk (3) which, in terms of cross section / diameter, protrudes radially from the winding core (1), in particular by means of which the hollow fiber mat can be positioned relative to the winding core (1) during winding. 7. the auxiliary element (3) constitutes a second force application surface for the sleeve (2d), which is capable of coming into contact with a second axial end (2d2) of the sleeve (2d), in particular with an end of the sleeve (2d) facing towards the second connecting region (2b) of the connecting element (2); a. the second end (2d2) of the sleeve (2d) facing the second connection region (2b) of the connecting element (2) protrudes from the axial end face of the winding core (1) when inserted into the winding core (1) of the connecting element (2), and a force can be applied to the sleeve (2d) by attaching an auxiliary element (3), in particular such that the second end (2d2) of the sleeve (2d) can be moved in the direction of the first end (2d1) of the sleeve (2d); b. the second end (2d2) of the sleeve (2d), facing the second connection region (2b) of the connecting element (2), when inserted into the winding core (1) of the connecting element (2), is located below or in the plane of the axial end face of the winding core (1), and the application / expansion after mounting of the auxiliary element (3) can be achieved by axial movement of the connecting element (2), in particular by a movement outward from the winding core (1), in particular whereby the first end (2d1) of the sleeve (2d) can be moved in the direction of the second end (2d2) of the sleeve (2d); 7. The winding system according to claim 5 or 6, 8. 8. The winding system according to any one of claims 5 to 7, characterized in that the position of the connecting element (2) can be fixed in the axial direction by a fixing ring (4) that can be inserted into the annular groove (2f) of the connecting element (2), and the connecting element (2) can be supported on the surface of the auxiliary element (3) by this fixing ring. 9. 9. A winding system according to any one of claims 1 to 8, characterized in that the connecting element (2) is provided with an operating element (5) by means of which the spreading of the expansion element (2d) in the first connecting region (2a) and / or the axial fixing of the connecting element (2) can be realized, in particular the operating element is supported on the auxiliary element (3) or on an element with a second force application surface or on a support element arranged on the connecting element (2), in particular the operating element (5) is formed as a nut on a threaded part of the connecting element (2) connected to the spreading element (2d) or as an eccentric body movable by a lever, rotatable about an axis. 10. 10. A winding system according to any one of claims 1 to 9, characterized in that the recess (1a) in the winding core (1) for accommodating the connecting element (2) is constituted by a passage which penetrates the winding core (1) at least in a region thereof and through which a medium, in particular blood, can flow after insertion of the winding core (1) into the housing of the mass exchange apparatus. 11. 11. The winding system according to any one of claims 1 to 10, characterized in that the recess (1a) in the winding core (1) for accommodating the connecting element (2) is surrounded by a passage extending at least in an area coaxially to the recess (1a) and through which a medium, in particular blood, can flow after insertion of the winding core (1) into the housing of the mass exchange apparatus.

Claims

1. A winding system for carrying out winding of connected hollow fibers onto a winding core (1), comprising: a. an exchange device for the exchange of substances and / or heat between two media, comprising a winding core (1) on which connected hollow fibers can be wound, the winding core being adapted to be inserted into a housing of the device together with the hollow fibers wound thereon and to remain therein; b. at least one connecting element (2) with two axially opposed connecting regions (2a, 2b) that can be temporarily connected to the winding core (1) in a non-rotatable manner by the first connecting region (2a) and can be connected to a drive device in a non-rotatable manner by the second connecting region (2b), by means of which the winding core (1) can be rotated about the winding axis (A); c) the first connecting region (2a) of the connecting element (2) has an expansion element (2d), the outer cross section of which can be expanded by expansion, the winding core (1) has at least one axial end face with a recess (1a) arranged around the winding axis (A), into which the first connecting region (2a) of the connecting element (2) can be inserted, and the winding core (1) can be non-rotatably connected to the connecting element (2) by expansion of the expansion element (2d); A wrapping system comprising:

2. 2. A winding system according to claim 1, characterized in that at least one connecting element (2) comprises in the first connecting region (2a) a shaft member which is axially divided into at least two axially parallel shaft sections which are located next to each other and between which a wedge element which is axially movable between the shaft sections is arranged as an expansion element.

3. 2. The winding system according to claim 1, characterized in that at least one connecting element (2) comprises, in the first connecting region, an axial member having an axial portion (2c), around which a sleeve (2d) made of elastic material is arranged as an expansion element, the sleeve (2d) being radially changeable in size by applying an axial force to ring-shaped end faces (2d1, 2d2) of the sleeve (2d) and axially displacing the end faces (2d1, 2d2) of the sleeve relative to one another.

4. 4. The winding system according to claim 3, characterized in that the sleeve (2d) bears with a first end (2d1) of its two axial ends (2d1, 2d2) against a first force application surface (2e) that is stationary relative to the axial region (2c) of the connecting element (2) and the sleeve (2d) bears with a second axial end (2d2) against a second force application surface of the connecting element (2), the second force application surface being movable on the axial member in the axial direction of the sleeve (2d) relative to the first force application surface (2e).

5. 5. The winding system according to claim 1, characterized in that in the unfolded state, the position of the connecting element (2) is axially fixable relative to the winding core (1) and relative to an auxiliary element (3) separate from the winding core (1) and which can be attached to one axial end face of the winding core (1) beyond the connecting element (2) after inserting a first connecting region (2a) of the connecting element (2) into a recess (1a) of the winding core (1).

6. 6. The winding system according to claim 5, characterized in that the auxiliary element (3) is formed by a disk (3) which, in terms of cross section / diameter, protrudes radially from the winding core (1) and by means of which the hollow fiber mat can be positioned relative to the winding core (1) during winding.

7. the auxiliary element (3) constitutes a second force application surface for the sleeve (2d), which second force application surface is contactable with an end of the sleeve (2d) facing towards the second connecting region (2b) of the connecting element (2); a. the second end (2d2) of the sleeve (2d), facing the second connection region (2b) of the connecting element (2), protrudes from the axial end face of the winding core (1) when inserted into the winding core (1) of the connecting element (2), and a force can be applied to the sleeve (2d) by means of the attachment of the auxiliary element (3), so that the second end (2d2) of the sleeve (2d) can be moved in the direction of the first end (2d1) of the sleeve (2d); b. the second end (2d2) of the sleeve (2d), facing the second connection region (2b) of the connecting element (2), is located below or in the plane of the axial end face of the winding core (1) when inserted into the winding core (1) of the connecting element (2), and the application / expansion after attachment of the auxiliary element (3) can be realized by axial movement of the connecting element (2) outward from the winding core (1), whereby the first end (2d1) of the sleeve (2d) can be moved in the direction of the second end (2d2) of the sleeve (2d); 7. A winding system according to claim 5 or 6, characterized in that

8. 8. A winding system according to any one of claims 5 to 7, characterized in that the position of the connecting element (2) can be axially fixed by a fixing ring (4) which can be inserted into an annular groove (2f) of the connecting element (2) and by means of which the connecting element (2) can be supported on the surface of the auxiliary element (3).

9. 9. A winding system according to claim 1, characterized in that the connecting element (2) is provided with an operating element (5) by means of which the spreading of the expansion element (2d) in the first connection area (2a) and / or the axial fixing of the connecting element (2) can be realized, the operating element being supported on the auxiliary element (3) or on an element with a second force application surface or on a support element arranged on the connecting element (2), the operating element (5) being configured as a nut on a threaded part of the connecting element (2) connected to the spreading element (2d) or as an eccentric body which can be moved by a lever and can rotate about an axis.

10. 10. The winding system according to claim 1, wherein the recess (1a) in the winding core (1) for receiving the connecting element (2) is constituted by a passage which passes at least regionally through the winding core (1) and which can be traversed by a medium after insertion of the winding core (1) into the housing of the mass exchange apparatus.

11. 11. The winding system according to claim 1, wherein the recess (1a) in the winding core (1) for receiving the connecting element (2) is surrounded by a passage extending at least in an area coaxially to the recess (1a) and through which a medium can flow after insertion of the winding core (1) into the housing of the mass exchange apparatus.

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