DE102021116083B4 - Method for producing a sealing device for an electrical machine and device for carrying it out - Google Patents

Abstract

Method for producing a sealing device (1) for an electrical machine for sealing a stator space to a rotor space, wherein the sealing device (1) is at least partially made of a fiber composite material, comprising the following steps: Providing and positioning a flat semi-finished product (2) made of uncured Fiber composite material with a unidirectional fiber orientation;Cutting the semi-finished product (2) to produce a parallelogram-like blank (12) with two longitudinal sides (22) running parallel to each other and two transverse sides (32) running parallel to each other and at an angle to the long sides (22);Applying a flexible manufacturing aid (3) on a receiving mandrel (4); aligning the blank (12) and the receiving mandrel (4) relative to one another so that the long sides (22) of the blank (12) are positioned at right angles to a rotation axis (14) of the receiving mandrel (4). ;Rolling up the blank (12) onto the rotatable mandrel (4) equipped with the production aid (3) so that the transverse sides (32) abut each other without a gap and an uncured cylindrical preform (10) is created; the blank (12) being placed on the mandrel (4) is rolled up so that the fibers of the blank (12) run at least partially parallel over the circumference of the receiving mandrel (4) and the receiving mandrel (4) is set in a rotational movement for rolling up the blank (12) in that the receiving mandrel ( 4) is rolled over the blank (12) and wherein the semi-finished product (2) is fixed on a processing table (6) by means of negative pressure at least during cutting and / or rolling onto the mandrel (4) and wherein the negative pressure is locally adjusted in a targeted manner during rolling in order to fix at least those areas of the semi-finished product (2) to a lesser extent or no longer at all, which have to leave the processing table (6) in order to be rolled up.

Description

The present invention relates to a method for producing a sealing device for an electrical machine and a device for carrying out the method. The sealing device serves to seal a stator space from a rotor space and is at least partially made of a fiber composite material.

Such a sealing device is, for example, from DE 10 2017 102 141 A1 known. There, the uncured fiber composite material is applied to a stator from the inside and then cured in order to create a cohesive connection between the stator and the sealing device. During curing, the sealing device is pressed against the stator. For example, a bellows or a metal core is used, which expands more when heated than the stator or the fiber composite material.

The DE 10 2018 125 863 A1 shows a method for producing a fiber composite cardan shaft tube. A stack of several reinforcing fiber layers is placed around a mandrel in accordance with the unwinding of the cardan shaft tube. The stack has corresponding, busy edge areas on its long sides. The edge regions are placed one on top of the other on the mandrel so that a first and second long side of each fiber layer are positioned adjacent to one another. A matrix material is introduced into the stack. Both are hardened together in a pressing tool.

The DE 10 2018 100 941 A1 shows the production of a rotor blade of a wind turbine made of fiber composite material. A rotatable winding core with a vacuum film is wrapped with a scrim and brought into an outer shape. Resin is introduced and cured using a vacuum infusion process. The vacuum is created between the vacuum film and the inside of the outer mold.

From the US 6,524,195 B1 is a process for producing a tubular body e.g. B. a golf club or a fishing rod or a bicycle frame made of fiber composite material. Several layers of prepregs are arranged one on top of the other. The layers each have an axial or oblique fiber orientation and a certain weight proportion of synthetic resin in order to specifically influence the mechanical stability of the tubular body.

In contrast, the object of the present invention is to provide an improved and preferably automated possibility for producing such a sealing device. In particular, economical production with high quality standards for the sealing device should be possible.

This object is achieved by a method with the features of claim 1 and by a device with the features of claim 13. Preferred developments of the invention are the subject of the subclaims. Further advantages of the present invention emerge from the general description and the description of the exemplary embodiment.

The method according to the invention is used to produce a sealing device for an electrical machine. The sealing device is intended for sealing a stator space from a rotor space. The sealing device is at least partially made of at least one fiber composite material. The method includes the following steps in this or another order suitable for production: providing and positioning a flat semi-finished product (so-called prepreg) made of uncured fiber composite material with a unidirectional fiber orientation; Cutting the semi-finished product to produce a particularly parallelogram-like blank with two longitudinal sides running parallel to one another and two transverse sides running parallel to one another and at an angle to the long sides; Applying a flexible manufacturing aid to a mandrel (in particular by pushing it on and/or rolling it up); Aligning the blank and the mandrel relative to one another so that the longitudinal sides of the blank are positioned perpendicular to a rotation axis of the mandrel; Rolling up the blank onto the rotatable mandrel equipped with the production aid so that the transverse sides abut each other without a gap (especially touching) and an uncured cylindrical preform is created; in particular providing the preform for positioning and curing in the stator; in particular before or after removing the preform from the receiving mandrel in the axial direction of the receiving mandrel. The blank is rolled onto the mandrel in such a way that the fibers of the blank run at least partially parallel over the circumference of the mandrel. To roll up the blank, the mandrel is set into a rotational movement by rolling the mandrel over the blank. The semi-finished product is fixed on a processing table using negative pressure at least during cutting and/or rolling onto the mandrel. The negative pressure is locally adjusted during rolling up in order to fix at least those areas of the semi-finished product to a lesser extent or no longer at all, which have to leave the processing table to be rolled up.

The method according to the invention offers many advantages. A significant advantage is that a very precise preform adapted to the stator can be produced in automated process steps. This offers significant qualitative and economic advantages over a procedure in which uncured pieces of the fiber composite material are individually laminated to the stator from the inside. Overall, the invention enables particularly reliable and at the same time reproducible production. The cutting of the semi-finished product according to the invention in combination with rolling it up is particularly advantageous. This enables precise and gap-free shaping of the semi-finished products into a cylindrical preform, which therefore offers a robust and highly mechanically effective seal.

The sealing device produced according to the invention can be referred to in particular as a liner. The semi-finished product can in particular also be referred to as a prepreg. The preform can in particular also be referred to as a preform. In particular, the liner is formed (cured) from the preform.

The semi-finished product is preferably fed automatically from at least one roll. In particular, at least one feed device is provided for this purpose. This is particularly advantageous at a high production rate. It is also possible for the semi-finished product to be fed in piece by piece. For example, partially assembled sections or mats are supplied for this purpose.

Before cutting, the semi-finished product is preferably fed into a positively determined processing position and preferably in the direction of a 0° fiber direction of a particularly unidirectional fiber orientation of the semi-finished product by means of at least one manipulator device.

In particular, at least one processing table with at least one stop is provided for the positively determined processing position. In particular, the semi-finished product is automatically applied to the at least one stop and preferably to at least two stops by means of the feed device. In particular, at least one stop is provided for at least one long side of the semi-finished product. In particular, at least one stop is provided for at least one transverse side of the semi-finished product. In particular, the stop can be aligned and preferably folded down. In all configurations, it is preferred that the stop can be extended at least in the z direction.

The semi-finished product is fixed on a processing table by means of negative pressure at least during cutting and/or at least during rolling onto the mandrel. In particular, the processing table has a plurality of suction points for this purpose.

The negative pressure is locally adjusted during rolling up. In particular, at least those areas of the semi-finished product or blank that have to leave or should leave the processing table in order to be rolled up are less firmly fixed or no longer fixed at all.

In all embodiments it is preferred that the semi-finished product is cut at an angle at least on the transverse sides by means of at least one manipulator device with at least one cutting unit. Preferably, the semi-finished product is cut at an angle to a 0° fiber direction of a unidirectional fiber orientation of the semi-finished product. In particular, the semi-finished product is cut at an angle of greater than 0°. In particular, the semi-finished product is cut at an angle smaller than a right angle to the 0° fiber direction. For example, the semi-finished product is cut at an angle of 45° to the 0° fiber alignment. Other angles are also possible, for example between 15° and 75° to the 0° fiber alignment. Both transverse sides of the semi-finished product are preferably cut at an equal angle to the 0° fiber direction. In particular, the transverse sides are cut at an angle in such a way that they run parallel to one another.

It is also possible for the long sides to be cut. In particular, the long sides are then cut parallel to a 0° grain direction. The long sides are cut so that they run parallel to each other.

The cut has the geometry of a parallelogram. It is possible for the long sides and transverse sides to be of the same length, so that the blank has the geometry of a rhombus.

The receiving mandrel preferably comprises a plurality of suction openings. In particular, the production aid is sucked into the suction openings of the mandrel using negative pressure. In particular, the negative pressure can be regulated in order to adjust friction between the production aid and the mandrel. In particular, the production aid is made of a material that is pressure-resistant under the expected pressure conditions.

The production aid is preferably subjected to excess pressure by means of the suction openings, so that the production aid together with the preform (without undesirable Changes in shape of the preform) can be removed from the mandrel in the axial direction. The preform can be separated from the mandrel inside or outside the stator. In particular, the production aid is removed from the preform. It is also possible for the production aid to remain on the preform.

A film tube is preferably used as a production aid. It is also possible and preferred for a shrink tube to be used as a production aid. In all configurations, it is preferred that the production aid serves as a carrier material for the preform that has not yet hardened. In particular, the production aid serves to be able to remove the preform from the mandrel. It is possible that the preform is pressed radially outward against the stator when positioned in the stator. For this purpose, it can be provided that pressure is exerted on the production aid. The preform can harden at least partially resting on the stator and in particular pressed against the stator.

The production aid is preferably applied by pushing the production aid onto the mandrel. In particular, the production aid is pushed axially onto the (stationary or non-rotatable) receiving mandrel. For example, the production aid is designed as a shrink tube and/or as a (closed) film tube. It is also possible for the production aid to be applied by (automatically) rotating the mandrel.

It is possible and advantageous for the semi-finished product to be equipped with at least one protective film on both sides. In particular, at least one upper protective film is removed before rolling onto the receiving mandrel and/or at least one lower protective film is removed after rolling onto the receiving mandrel by means of at least one manipulator device with a suction cup unit and/or a gripping unit. The semi-finished product can also only have a protective film on one side. It is also possible that the semi-finished product does not have a protective film.

In particular, the semi-finished product is cooled at least in sections to locally reduce the adhesion of the protective film. For example, an agent with a lower temperature than the ambient temperature or the temperature of the protective film is used. This is done in particular by means of the manipulator device, which is equipped with a suitable tool unit.

In an advantageous development of the method, the sealing device is made from a two-layer or multi-layer fiber composite material. In particular, the preform comprises at least two coaxially arranged semi-finished products. In particular, the semi-finished products each provide one layer of the preform or the sealing device. In particular, the semi-finished products are each positioned and cut to size so that a blank is available for each semi-finished product, as described above. Preferably, the blanks are rolled one after the other onto the mandrel, so that an uncured cylindrical preform with at least two layers is created. It is also possible for three or more blanks to be rolled up to create a three-layer or multi-layer preform. The preform can also be designed in one layer.

The semi-finished products for the at least two-layer preform each have, in particular, a unidirectional fiber orientation. In particular, the semi-finished products are cut at an angle to the 0° fiber direction at least on their transverse sides using at least one manipulator device. In particular, the transverse sides of the at least one semi-finished product are cut at a different angle to the 0° fiber direction than the transverse sides of the at least one other semi-finished product. The angles particularly preferably differ in terms of their signs. For example, one semi-finished product is cut at an angle of +45° and the other semi-finished product is cut at an angle of -45° on the transverse sides. In particular, the transverse sides belonging to a semi-finished product are cut at the same angle. In this way, parallel or even overlapping joints can be avoided. The coaxial outer blank is in particular rolled up in such a way that its joint is at least partially or even completely spaced from the joint of the coaxial inner blank. In particular, the semi-finished products are aligned parallel to one another with respect to their 0° fiber direction. However, angular arrangements of the semi-finished products in relation to their 0° fiber directions are also possible.

In all embodiments it is preferred that the receiving mandrel is arranged on a guide device. In particular, the receiving mandrel can be automatically aligned relative to the semi-finished product or blank by the guide device. Such a guide device usually offers a significantly more precise alignment of the mandrel than, for example. B. a manipulator in the manner of an industrial robot. For this purpose, the management device can z. B. have single-axis or two-axis or multi-axis mobility. For example, the receiving mandrel can be moved along one or along two or three axes of the guide device. But the mandrel can can also be arranged on a manipulator device and, for example, on an industrial robot.

To roll up the blank, the mandrel is set into a rotational movement by rolling the mandrel over the blank (lying on the processing table). This has the advantage that there is no disturbing relative speed between the mandrel and the blank and thus a particularly high level of process reliability is achieved. In particular, a drive of the receiving mandrel can be disconnected or switched off for this purpose.

In particular, the diameter of the receiving mandrel is adapted to a diameter of the preform to be produced. In particular, the receiving mandrel is cylindrical. In particular, the receiving mandrel is adapted to the contour of the preform and/or to the contour of a radial inside of the stator.

The device according to the invention is used to carry out the method for producing a sealing device, as described above. The object according to the invention can also be achieved particularly advantageously with such a device.

The device is designed in particular as a processing center. In particular, the device comprises the previously described means for carrying out the method. In particular, the device is suitable and designed to carry out the method steps described above. In particular, the device comprises at least one receiving mandrel. In particular, the device comprises at least one manipulator device and in particular at least one guide device and in particular at least one processing table and in particular at least one feed device. The receiving mandrel is coupled in particular to the guide device. However, it is also possible for the receiving mandrel to be coupled to the manipulator device.

In particular, the manipulator device comprises at least one suction cup unit and/or gripping unit. The manipulator device is designed, for example, as an industrial robot or as another device which offers an arm with one or two or more axes of movement. In particular, the processing table comprises at least one and preferably at least two alignable stops.

In particular, the device comprises at least one cutting unit. Preferably, the cutting unit is coupled to a guide device and particularly preferably to the guide device of the receiving mandrel. The cutting unit is attached in particular where the mandrel is also attached. This offers particularly precise guidance of the cutting unit. It is also possible to use the cutting unit e.g. B. mounted on a robot arm, but this is not recommended for maximum precise results. The cutting unit can be arranged movably or stationary on the guide device. The cutting unit can be arranged on the receiving mandrel.

An uncured fiber composite mat is preferably provided as a semi-finished product. In particular, the semi-finished product consists of at least one fiber composite material. In particular, the semi-finished product comprises at least one matrix material and at least one type of reinforcing fibers, which are embedded in the matrix material. An endless fiber-reinforced plastic is preferably provided. In all embodiments it is provided that the semi-finished product has a unidirectional fiber orientation. The semi-finished product can also be referred to as a so-called UD fabric (unidirectional fabric). A bi- or multi-directional fiber alignment or a fabric, braid and/or a similar suitable semi-finished product is also possible.

In particular, the blank is rolled onto the mandrel in such a way that the fibers of the blank run at least partially parallel over the circumference of the mandrel and meet one another in a ring-like manner, in particular at the ends. In particular, the fiber ends of the individual fibers meet at least approximately and preferably touching one another. However, it is also possible that the fibers meet one another in an offset manner. In particular, the fibers run concentrically around a longitudinal axis of the receiving mandrel or concentrically around a longitudinal axis of the preform. However, the fibers can also run transversely or helically around the longitudinal axis of the receiving mandrel or the preform.

Further advantages of the present invention result from the exemplary embodiments, which are explained below with reference to the accompanying figures.

• 1 eine stark schematisierte Darstellung einer erfindungsgemäßen Vorrichtung während der Herstellung einer Abdichteinrichtung nach dem erfindungsgemäßen Verfahren;
• 2 die Vorrichtung der 1 bei einem anderen Schritt des Verfahrens;
• 3 die Vorrichtung der 1 bei einem weiteren Schritt des Verfahrens; und
• 4 die Vorrichtung der 1 bei noch einem weiteren Schritt des Verfahrens.

Show in the figures:

• 1 a highly schematic representation of a device according to the invention during the production of a sealing device according to the method according to the invention;
• 2 the device of 1 at another step in the process;
• 3 the device of 1 at a further step in the process; and
• 4 the device of 1 in yet another step of the process.

The 1 shows a device 7 for carrying out a method according to the invention for producing a sealing device 1 for an electrical machine, which has not yet been completed here. The device 7 is designed here, for example, as a machining center and includes at least one manipulator device 5 with a plurality of interchangeable machining tools. The manipulator device 5 is equipped, for example, as an industrial robot with one or more arms.

The operation of the device 7 when carrying out the manufacturing method according to the invention will now be described below with reference to 1 until 4 presented in more detail.

A semi-finished product 2 or prepreg, for example made of glass fiber reinforced plastic, is applied to a processing table 6 via a feed device 8. In this case, assembly can be provided directly from a prepreg roll or assembly from prepregs introduced in pieces. The semi-finished product 2 here has a unidirectional fiber orientation (UD fabric). The feed device 8 enables the semi-finished products 2 to be fed at the later storage angle.

The semi-finished product 2 is then positioned/pulled out by means of the manipulator device 5 with a suction cup unit 25 and/or a gripping unit 35. The semi-finished product 2 is aligned at two or more stops 26 (extendable in the z direction, foldable). The angular position and the feed of the semi-finished product 2 can be adjusted using the feed device 8 and by selecting the positioning angle and the arrangement of the stops 26. The 0° fiber direction corresponds to the direction of the feed.

The semi-finished product 2 is then fixed in a secure position via suction points 16 integrated in the processing table 6. The semi-finished product 2 is then cut to size using, for example, a mechanically designed cutting unit 15.

In the example shown here, the production of a 2-layer sealing device 1 is intended. Therefore, two semi-finished products 2 are arranged here on the processing table 6. That in the 1 The semi-finished product 2 shown on the right is already available as a finished blank 12. The other semi-finished product 2 is still being processed with the cutting unit 15.

The semi-finished products 2 are cut here in such a way that blanks 12 each have two longitudinal sides 22 that run parallel to one another and two transverse sides 32 that run parallel to one another and at an angle to the long sides 22. For example, for the blank 12, which forms the first layer, a cutting line with an angle of +45° to the 0° fiber alignment is provided. For the second blank 12, which forms the second layer, for example, a cutting line of -45° to the 0° fiber alignment is provided. With the device 7 presented here, both semi-finished products 2 can be cut to size under a defined angular orientation.

An upper protective film 42 of the blank 12 for the first layer is then automatically removed (see 2 ). A refrigerant, for example CO2, is used to locally reduce the adhesive effect or adhesion. The refrigerant is z. B. delivered from the arm of the manipulator device 5. The manipulator device 5 then removes the protective film 42 by means of a suction cup unit 25 and/or a gripping unit 35.

To produce a cylindrical sealing device 1, the manipulator device 5 is here equipped with a receiving mandrel 4 or winding mandrel that can be rotated about an axis of rotation 14 for winding up the semi-finished products 2 (see 3 ). For precise alignment relative to the blank 12, the mandrel 4 can be moved here by means of a guide device (not shown in detail). In particular, the cutting unit 15 is also attached to the guide device.

Before rolling up the semi-finished products 2, a production aid 3 in the form of a (plastic) film tube 23 is applied to the receiving mandrel 4 (e.g. by axially pushing it on or by rolling it up). Alternatively or additionally, a shrink tube 33 can also be provided.

The mandrel 4 is made here, for example, from steel, aluminum or a fiber composite plastic. The mandrel 4 here has several and, for example, more than 25 holes, which are distributed over its circumference and length. The bores provide suction openings 24, which are used to suck in the production aid 3. By creating a negative pressure area between the receiving mandrel 4 and the film tube 23, the friction can be increased and the film tube 23 can be reliably fixed together with the rolled-up semi-finished product 2.

Like in the 3 shown, after the film tube 23 has been applied, the blank 12 for the first layer is rolled up. For this purpose, the mandrel 4 is aligned so that the long sides 22 of the blank 12 are perpendicular to a rotation Axis 14 of the mandrel 4 are positioned. By turning the mandrel 4, the blank 12 is then rolled up. Then the mandrel 4 is rolled over the blank 12 and thereby set in a rotational movement so that the blank 12 can be rolled up precisely. A drive of the receiving mandrel 4 is decoupled.

By rolling up in this way, the blank 12 is transferred into a cylindrical tube without any noticeable impact. The fibers and the matrix material are arranged parallel in the joint area. This results in a shock-free and gap-free arrangement for the rolled-up blank 12. During the rolling-up process, the suction pressure at the suction points 16 of the processing table 6 is regulated in a zone-appropriate or zone-by-zone manner, so that optimal rolling-up can take place.

The lower protective film 42 is then removed from the rolled-up semi-finished product 2, as shown in FIG 4 is shown. The lower protective film 42 is removed here, for example, as previously described for the upper protective film 42.

The receiving mandrel 4 is then aligned relative to the blank 12 for the second layer. The blank 12 is then rolled up in the manner described previously for the first layer. If further layers are provided for the sealing device 1, these are rolled up in the same way.

There is now an unhardened cylindrical preform 10 on the receiving mandrel 4. A liner can now be produced from the preform 10 by targeted hardening, for example in the stator, which provides the sealing device 1.

After all the intended semi-finished products 2 have been rolled up onto the mandrel 4, pressure is applied through the suction openings 24, so that overpressure areas arise between the mandrel 4 and the film tube 23. This leads to a reduction in the contact area and to less friction between the film tube 23 and the receiving mandrel 4. This allows a particularly smooth movement in the axial direction, for example to remove the preform 10 from the receiving mandrel 4. The manipulator device 5 can have a tool to remove the preform 10 from the mandrel 4 under excess pressure, e.g. B. the gripping unit 35 and/or the suction cup unit 25.

The removal can preferably take place before the preform 10 is introduced into the stator. However, it is also possible for the receiving mandrel 4 to be inserted into the stator for positioning the preform 10 and for the receiving mandrel 4 to be separated from the preform 10 only after positioning in the stator.

The invention offers industrial production of a preform 10 with one or more fiber layers without disruptive fiber separation over the entire circumference. In addition, precise rolling up for gap-free contact of the delimiting fibers of the blanks 12 is made possible, so that fiber layers are possible without gaps between the fibers. Such freedom from gaps is particularly relevant for a robust and mechanically highly effective seal through a liner. In addition, the invention enables rolling up within a narrow tolerance range in terms of diameter and length. Another advantage is that the blanks 12 can be rolled up directly onto the production aid 3 and in particular the film tube 23 or onto a shrink tube 33. The invention also offers full automation including removing the protective film 42.

List of reference symbols:

1

Sealing device

2

Workpiece

3

Manufacturing aids

4

mandrel

5

Manipulator device

6

Processing table

7

contraption

8th

Feeding device

10

preform

12

Cutting

14

Axis of rotation

15

cutting unit

16

Suction point

22

Long side

23

Foil tube

24

Intake openings

25

Suction cup unit

26

attack

32

Cross side

33

Heat shrink tubing

35

Gripping unit

42

Protective film

Claims (13)

Method for producing a sealing device (1) for an electrical machine for sealing a stator space to a rotor space, the sealing device (1) being at least partially made of a fiber composite material, comprising the following steps: Providing and positioning a flat semi-finished product (2) made of uncured fiber composite material with a unidirectional fiber orientation; Cutting the semi-finished product (2) to produce a parallelogram-like blank (12) with two longitudinal sides (22) running parallel to one another and two transverse sides (32) running parallel to one another and at an angle to the long sides (22); Applying a flexible manufacturing aid (3) to a mandrel (4); Aligning the blank (12) and the mandrel (4) relative to one another so that the longitudinal sides (22) of the blank (12) are positioned at right angles to a rotation axis (14) of the mandrel (4); Rolling up the blank (12) onto the rotatable mandrel (4) equipped with the production aid (3) so that the transverse sides (32) abut each other without a gap and an uncured cylindrical preform (10) is created; wherein the blank (12) is rolled onto the mandrel (4) in such a way that the fibers of the blank (12) run at least partially parallel over the circumference of the mandrel (4). and wherein the receiving mandrel (4) is set into a rotational movement for rolling up the blank (12) by rolling the receiving mandrel (4) over the blank (12). and wherein the semi-finished product (2) is fixed on a processing table (6) by means of negative pressure at least during cutting and/or rolling up onto the mandrel (4), and wherein the negative pressure is adjusted locally in a targeted manner during rolling up in order to at least those areas of the semi-finished product ( 2) to be fixed less strongly or not at all, which have to leave the processing table (6) to be rolled up. Method according to the preceding claim, wherein the semi-finished product (2) is automatically fed from at least one roll or piecewise. Method according to one of the preceding claims, wherein the semi-finished product (2) is fed into a positively determined processing position in the direction of a 0° fiber direction of a unidirectional fiber orientation of the semi-finished product before cutting by means of at least one manipulator device (5). Method according to one of the preceding claims, wherein the semi-finished product (2) is cut at an angle to a 0° fiber direction of a unidirectional fiber orientation of the semi-finished product at least on the transverse sides (32) by means of at least one manipulator device (5) with a cutting unit (15). Method according to one of the preceding claims, wherein the receiving mandrel (4) has a plurality of suction openings and wherein the production aid (3) is sucked into the suction openings (24) of the receiving mandrel (4) by means of negative pressure. Method according to the preceding claim, wherein the production aid (3) is subjected to excess pressure at the suction openings (24), so that the preform (10) can be removed together with the production aid (3) in the axial direction from the receiving mandrel (4). Method according to one of the preceding claims, wherein a film tube (23) or a shrink tube (33) is used as the production aid (3). Method according to one of the preceding claims, wherein the semi-finished product (2) is equipped on both sides with at least one protective film (42) and at least one upper protective film (42) before rolling onto the receiving mandrel (4) and at least one lower protective film (42) after rolling onto the receiving mandrel (4) is removed by means of at least one manipulator device (5) with a suction cup unit (25) and/or a gripping unit (35). Method according to the preceding claim, wherein the semi-finished product (2) is cooled at least in sections to locally reduce the adhesion of the protective film (42). Method according to one of the preceding claims, wherein the preform (10) comprises at least two coaxially arranged semi-finished products (2) and wherein the semi-finished products (2) are each positioned and cut to size, so that a blank (12) is available for each semi-finished product (2) and wherein the blanks (12) are rolled one after the other onto the mandrel (4), so that an at least two-layer, uncured cylindrical preform (10) is created. Method according to the preceding claim, wherein the semi-finished products (12) each have a unidirectional fiber orientation and wherein the semi-finished products (12) are at least on their transverse sides (32) by means of at least one manipula gate device (5) are cut at an angle to the 0° fiber direction and the transverse sides (32) of the at least one semi-finished product (2) are cut at a different angle to the 0° fiber direction than the transverse sides (32) of the at least one other semi-finished product (2 ). Method according to one of the preceding claims, wherein the receiving mandrel (4) is arranged on a manipulator device (5) and is rolled over the blank (12) for rolling up. Device (7) for carrying out the method according to one of the preceding claims.

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