Textile machine with core thread supply

Abstract

The invention relates to a textile machine, in particular a rotor spinning machine, comprising a disentangling roller housing for enclosing a disentangling roller for disentangling a fiber sliver into largely separated fibers and a fiber guide channel, wherein the fiber guide channel is arranged on the disentangling roller housing in such a way as to discharge the largely separated fibers from the disentangling roller housing and feed them to a spinning rotor. To improve textile machines and increase yarn quality, it is provided that a core yarn feeder is arranged and configured at a transition area between the fiber guide channel and the disentangling roller housing at the inlet of the fiber guide channel, in such a way as to introduce a core yarn into the fiber guide channel in order to feed the core yarn through the fiber guide channel to the spinning rotor.

Description

[0001] The invention relates to the production of core yarn on textile machines, in particular rotor spinning machines. The invention relates to a textile machine, in particular a rotor spinning machine. The invention relates to a method.

[0002] In the prior art, blended yarns can be produced by feeding a core yarn into a yarn production process, where fibers attach themselves around the core yarn to wrap around it. In this way, the core yarn can define one property of the core, such as elasticity, while the wrapping fibers can define another property, such as the feel of the fibers, in order to transfer this to the textile to be produced later. A method of feeding a core yarn to a spinning turbine is known from DE 26 25 620 A1, which describes that the core yarn feed comprises a feed tube that is led through the open end face of the spinning turbine to the spinning groove. The quality of the resulting yarn is considered to be in need of improvement.

[0003] The purpose of the invention is therefore to improve textile machines in order to increase yarn quality.

[0004] The problem is solved by a textile machine with the features of claim 1. The problem is solved by a method with the features of claim 8. The textile machine can be described by the features, properties, and advantages of the method. This applies regardless of the respective category and across category boundaries—device, system, method, and use. Conversely, the method can also be described by the features, properties, and advantages of the textile machine. Advantageous embodiments of the invention are the subject of the dependent claims.

[0005] According to one aspect, the problem is solved in particular by a textile machine with the features of claim 1.

[0006] A textile machine, in particular a rotor spinning machine, can have a disentangling roller housing for enclosing a disentangling roller for disentangling a fiber sliver into largely separated fibers and a fiber guide channel. The fiber guide channel can be arranged on the disentangling roller housing to discharge the largely separated fibers from the housing and feed them to a spinning rotor. A core yarn feeder can be arranged and configured at the inlet of the fiber guide channel, at a transition area between the fiber guide channel and the disentangling roller housing, to introduce a core yarn into the fiber guide channel and feed the core yarn through the fiber guide channel to the spinning rotor.

[0007] A textile machine is, in particular, a system for manufacturing textile products such as yarns or fabrics. It comprises various components and devices that can be used to transform natural and / or synthetic fibers into a product. These can be machines for producing natural fiber yarns as well as machines for producing synthetic fiber yarns. A rotor spinning machine is a prime example of a textile machine.

[0008] The disentanglement roller housing is, in particular, a part of the textile machine, specifically a rotor spinning machine, which can be used to hold or enclose a disentanglement roller. This roller serves to disentangle fibers from a fiber sliver fed to it. The disentanglement roller has, in particular, a roller surface designed to release the fibers from the fiber sliver, separate them, and guide them in a predetermined direction.

[0009] The fiber guide channel is, in particular, a channel system that can be used to guide the separated fibers released by the disentanglement roller into the spinning rotor. The fiber guide channel can consist of one or more tube shapes and is arranged, in particular, so that the fibers can be guided into a specific area of ​​the spinning rotor to be spun into a yarn.

[0010] The largely separated fibers are primarily those that can be separated from other fibers in the fiber web by dissolving them with the dissolving roller. It is particularly important that the separated fibers do not clump or bind together when they transition from the dissolving roller housing into the fiber guide channel. This can be achieved, for example, by applying a vacuum or, alternatively, a vacuum and the resulting fluid flow within the fiber guide channel. The fibers can then be further stretched to allow them to be transferred as individual fibers into the spinning rotor. There, they are joined into a yarn by the rotation of the spinning rotor in a rotor groove, and the yarn can be drawn off the spinning rotor via a yarn channel.

[0011] The fiber guide channel is designed and arranged in such a way that the largely separated fibers can be conveyed from the dissolving roller housing and fed to a spinning rotor to enable the spinning of the yarn (the resulting thread).

[0012] A core yarn feeder can be arranged and configured at the transition area between the fiber guide channel and the dissipation roller housing at the inlet of the fiber guide channel to introduce the core yarn into the fiber guide channel and feed it to the spinning rotor. This can improve the efficiency and quality of the resulting yarn from the textile machine.

[0013] The core yarn (e.g., an elastane yarn) can be fed into the fiber guide channel (also referred to as the fiber channel), which transports the separated fibers released by the disentanglement roller (also known as the spool) into the rotor cup. The core yarn, such as the elastane yarn, can be fed at the beginning of the fiber transport (directly behind the disentanglement roller housing). In other embodiments not according to the invention, this can occur within the fiber transport system, i.e., in the fiber guide channel. In other embodiments not according to the invention, this can occur at the end of the fiber transport system (in the area of ​​a channel plate adapter). The channel plate adapter can serve as a cover for the spinning rotor. The core yarn can be fed by means of a vacuum and / or a compressed air flow.

[0014] The described embodiments allow the fibers and core yarn, particularly the elastane yarn, to simultaneously and jointly impact a rotor cup slip surface. This enables improved winding of the core yarn, especially the elastane yarn. The core yarn, particularly the elastane yarn, can be drawn in by the negative pressure already present in the rotor housing in corresponding embodiments. Additionally, a compressed air injector can be used, or a spool containing the core yarn, particularly the elastane yarn, can be driven to move the core yarn. Feeding the core yarn, particularly the elastane yarn, at the beginning of the fiber transport (directly behind the dissipation roller housing) can, compared to other variants, allow for a longer joint transport of the core yarn and fibers, which can lead to even better winding.In one embodiment, the core filament can be fed in at the inlet of the fiber guide channel. A transition zone can be formed between the dissolving roller housing and the fiber guide channel. This transition zone can be located, in particular, between 10 mm (i.e., located in or starting within the dissolving roller housing) and up to 20 mm within the fiber guide channel. In other embodiments, it can be located between 5 mm and 18 mm, more specifically between 0 mm and 15 mm, more specifically between 2 mm and 10 mm, and more specifically between 4 mm and 6 mm. It can be provided, in particular, that the transition zone is located in an area of ​​highest wear within the fiber guide channel. The transition zone between the fiber guide channel and the dissolving roller housing can extend to the first third, preferably to the first quarter, of the fiber guide channel, measured from the inlet of the fiber guide channel.

[0015] According to one aspect, a bulge shape can be arranged at the transition area between the fiber guide channel and the dissolving roller housing at the entrance of the fiber guide channel.

[0016] According to one aspect, the bulge shape can be designed as a flow contour. The flow contour can be positioned and designed at the transition between the fiber guide channel and the dissipation roller housing to optimize, and in particular to simulate, airflow in the transition area. Turbulent flow can impair fiber transport by causing impurities and defects in the yarn, for example, because certain fibers are not stretched. Alternatively or additionally, cleaning efforts can also increase because the turbulence can concentrate fibers in an area that can lead to a gradual accumulation of fibers in the fiber channel, the dissipation roller housing, and / or the transition area. A flow contour is, in particular, a structure designed to fill an area where turbulent flow would otherwise occur.

[0017] The flow contour in the fiber guide channel, in the dissolving roller housing, and / or in a transition area between the fiber guide channel and the dissolving roller housing is specifically arranged and designed to create an optimized airflow in the fiber guide channel, in the dissolving roller housing, and / or in the transition area between the fiber guide channel and the dissolving roller housing. An airflow, in particular, comprises a fluid flow, such as ambient air, dry air, nitrogen gas, and / or other gases, for example, from the atmosphere. A flow contour, in particular, has a surface that is arranged and designed to confine a largely laminar fluid flow in order to direct or control the fluid flow without allowing turbulence, since the surface delineates the area in which such turbulence would occur.

[0018] By designing and shaping a flow contour in the fiber guide channel, the dissolving roller housing, and / or in a transition area between the fiber guide channel and the dissolving roller housing, an optimized airflow can be created. Turbulent flow is characterized by irregular and chaotic flow, which can be deterministically chaotic, making prediction difficult and hindering fiber guidance. Applying a flow contour minimizes these guidance difficulties and results in improved yarn quality. It also reduces the resource expenditure for subsequent cleaning of deposits.

[0019] The bulge shape is specifically a protrusion or elevation in the flow contour, which is used to optimize airflow in the transition region and minimize turbulent flows.

[0020] The bulge shape can be designed in various sizes and forms to optimize airflow within the fiber guide channel, the dissolving roller housing, and / or the transition zone between the fiber guide channel and the dissolving roller housing. The bulge shape can also be adapted to delineate areas where turbulent flow might otherwise occur. In particular, the dissolving roller housing can have a cylindrical shape. This allows for a region at the transition to a fiber guide channel where the airflow can bend, creating a region with lower flow density in one direction within the fiber guide channel that exhibits turbulent flow. The bulge shape can specifically replicate this bending of the laminar flow to shield an area that could otherwise lead to turbulent flow.

[0021] In particular, the application of a flow contour with a bulge shape improves the efficiency and quality of the yarn manufacturing process by minimizing turbulent flows and optimizing the airflow in the fiber guide channel, in the dissolving roller housing and / or in the transition area between the fiber guide channel and the dissolving roller housing.

[0022] An exemplary embodiment of a flow contour features, in particular, a bulge at the inlet of the fiber guide channel. The bulge can include a channel for feeding the core filament, allowing the core filament to be fed in the axial direction of the fiber guide channel. Fiber flow separation can occur within the fiber guide channel. The resulting turbulence reduces the effectiveness of fiber separation and fiber transport. By using a flow contour, such as the bulge, this turbulence can be reduced more effectively, resulting in improved fiber separation. The flow contour can be integrated into both the dissolving roller housing and the fiber guide channel. In other embodiments, the flow contour can be located only in the fiber guide channel or only in the dissolving roller housing. Furthermore, the flow contour can be designed as a separate component.An insert, which can increase the effectiveness of fiber release, can be provided, as described elsewhere herein. Adapting this geometry to respond to changes in spinning pressure and / or disentanglement roll speeds can thus be simplified and made possible without additional design effort. Easy interchangeability of the insert is also possible. The insert can be shaped, among other things, as a partial circular segment of the disentanglement roll housing and incorporate both the geometry of the housing and, in part, the fiber guide channel and the bulge. The insert can be inserted laterally. Its alignment and positioning are achieved primarily through a positive fit between the insert and the disentanglement roll housing and / or the fiber guide channel. For tolerance reasons, one of these two components serves as the basis for this fit.To keep the insert within its position, a force-fit connection can be achieved using an externally arranged leaf spring or an internal ball-spring element.

[0023] According to one aspect, the flow contour or bulge shape can provide a guide for the core fiber. This allows the core fiber to be inserted into the fiber guide channel according to the guide, thereby stabilizing movement in one fiber direction.

[0024] According to one aspect, the flow contour or bulge shape can be provided at the transition area between the fiber guide channel and the dissipation roller housing, designed to encompass the core yarn along its length in the yarn guidance direction. The core yarn is guided by the flow contour and drawn / inserted into the fiber guide channel, where it can be brought together with the largely separated fibers to be fed to a spinning rotor.

[0025] The flow contour or bulge shape is specifically designed and configured to encompass the core yarn along its length in the yarn guidance direction. This allows the core yarn to be introduced into the fiber guide channel uniformly and streamlined, and to be brought together with the largely separated fibers, resulting in improved winding of the core yarn, particularly the elastane yarn. The core yarn guide within the flow contour or bulge shape is specifically designed to generate optimal airflow in the transition area between the fiber guide channel and the dissolving roller housing. This reduces fiber flow separation and increases the effectiveness of fiber separation, while ensuring the core yarn is introduced into the fiber guide channel with minimal disruption.

[0026] Overall, the application of a flow contour with core yarn guidance improves the efficiency and quality of the yarn manufacturing process by introducing the core yarn evenly and streamlined into the fiber guide channel and reducing fiber flow separation, while also improving the winding of the core yarn.

[0027] According to one aspect, the guide for the core yarn, here referred to as the core yarn feeder, can be designed and arranged to feed the core yarn into the fiber guide channel at its entrance in the axial direction of the fiber guide channel. The fiber guide channel is, in particular, a channel, as described in detail elsewhere herein, which can guide the fibers released from the fiber tape by the disentanglement roller towards the spinning rotor. The axial direction of the fiber guide channel refers in particular to the direction in which the fibers move within the fiber guide channel.

[0028] The core yarn feeder is a component used to feed the core yarn, particularly the elastane yarn, into the fiber guide channel. It is designed and positioned to feed the elastane yarn into the fiber guide channel along its axis. This allows the elastane yarn and released fibers to simultaneously strike the rotor cup slip surface, resulting in improved winding of the elastane yarn. The core yarn can be moved within the core yarn feeder using a vacuum or compressed air flow. The core yarn, especially the elastane yarn, is drawn from the fiber guide channel into the spinning rotor, particularly by a (channel plate) adapter. Overall, using a core yarn feeder aligned with the axis of the fiber guide channel improves the movement of the core yarn within the channel. The core yarn also travels the entire length of the fiber guide channel, starting from its inlet.This allows for improved winding of the core strand. Feeding the core strand axially is particularly easy when combined with a bulge shape that incorporates the core strand guide. For this purpose, the bulge shape can have a guide channel for the core strand, which terminates at the entrance of the fiber guide channel such that the guide channel points axially in the direction of the fiber guide channel.

[0029] According to one aspect, a separate component can be designed that can be guided laterally as an insert. This separate component is specifically arranged and designed to serve as a flow contour in the fiber guide channel, the dissolving roller housing, and / or the transition area between the fiber guide channel and the dissolving roller housing. The separate component can form the flow contour. It is guided laterally, meaning it can be arranged with corresponding structures in the area of ​​the dissolving roller housing, and serves in particular to optimize the airflow in the transition area between the fiber guide channel and the dissolving roller housing. By using a separate component as an insert, turbulence can be reduced and improved winding of the core yarn, especially the elastane yarn, can be achieved.In particular, the use of a separate component as an insert, especially guided laterally, allows the system to be adapted to changed flow conditions and / or operating states.

[0030] According to one aspect, an insert can be designed with a bulge shape and positioned so that the bulge is located in a transition area between the fiber guide channel and the disentanglement roller housing of a textile machine, as described elsewhere herein. The insert, which can also be referred to as an insert component, can be guided laterally to allow for quick replacement, even on a textile machine. By shaping the bulge as a flow contour, the airflow in the transition area between the fiber guide channel and the disentanglement roller housing can be optimized. Using an insert with a flow contour reduces turbulence and improves the winding of the core yarn, especially elastane yarn, particularly when the core yarn is introduced in a transition area between the disentanglement roller housing and the fiber guide channel.

[0031] The application can be described by the features, advantages, and properties of the textile machine and / or the process. Conversely, the textile machine and / or the process can also be described by the features, advantages, and properties of its application. This applies particularly across category boundaries—device, system, process, and use. For the sake of brevity and readability, a repetition of all these points is omitted.

[0032] According to one aspect, the insert can have a guide for the core thread – a core thread guide – in the bulge shape or flow contour. This can be designed to be arranged such that it at least partially encompasses the core thread over a length of the core thread in the thread guidance direction.

[0033] The guide for the core strand within the flow contour or bulge shape is specifically designed and positioned to guide the core strand smoothly and streamlined into the fiber channel. This ensures that the airflow remains largely laminar, even during core strand insertion. This facilitates better wrapping of the elastane strand and reduces flow separation that can lead to turbulence. The flow contour or bulge shape can be designed and positioned as a separate component or integrated into the insert. This allows the insert itself to be modular, adapting it to the specific requirements of different operating conditions.

[0034] According to an independent aspect, a process may include the step of feeding a core yarn into a fiber guide channel of a textile machine, particularly as described elsewhere herein. The core yarn may, for example, be made of elastane or another material. The fiber guide channel serves, in particular, to guide the fibers separated and separated from a fiber spool by the unwinding roller to a spinning rotor.

[0035] The core yarn is fed in, in particular, directly behind the dissolving roller housing. Feeding can be achieved using a vacuum or compressed air flow.

[0036] The process can include the step of feeding a fiber ribbon to a disentangling roller housing. The process can also include the step of disentangling and singulating fibers from the fiber ribbon. This can be accomplished, in particular, by the disentangling roller, which is rotatably mounted within the disentangling roller housing. During singulation, the singulated fibers are drawn into the fiber guide channel, making it possible to combine them with a core yarn and feed them to a spinning rotor. A spinning step can be performed in the spinning rotor, in which the fibers are spun into a yarn within a rotor groove, forming wrap fibers that can wind around the core yarn.

[0037] Overall, the application of a method for feeding the core yarn into the fiber guide channel improves the efficiency and quality of the yarn manufacturing process by enabling the simultaneous and combined impact of the elastane yarn and dissolved fibers on the rotor cup slip surface. This results in better wrapping of the elastane yarn and reduces fiber flow separation, which can lead to turbulence.

[0038] Exemplary embodiments of the invention are described in more detail below with reference to the figures, which show schematically and by way of example: Fig. 1 a schematic representation of an exemplary embodiment of a textile machine; Fig. 2A a sectional view of an exemplary embodiment of a dissolving roller housing with a coupled fiber guide channel and flow contour; Fig. 2B a schematic representation of a flow profile in an exemplary embodiment of a dissolving roller housing with a coupled fiber guide channel without a flow contour; Fig. 3 a sectional view of an exemplary embodiment of a dissolving roller housing with a coupled fiber channel, flow contour and core yarn feed; and Fig. 4 a schematic representation of an exemplary embodiment of a method.

[0039] The same reference symbols are used for elements and structures that have the same effect and / or are of the same type.

[0040] Fig. 1Figure 1 shows a schematic representation of an exemplary embodiment of a textile machine 100, which can be configured as a rotor spinning machine 200. Rotor spinning machines 200 have a spinning rotor 10, which can be formed from a rotor cup 30 into which individual fibers 11 can be fed via a fiber guide channel 7. The spinning rotor 10 is driven rotaryally, for example by a separate motor (not shown) or via a drive belt, perhaps together with other components of the rotor spinning machine 200.

[0041] The individual fibers 11 can be introduced into the rotor cup 30, for example via a channel plate adapter 12, which can be connected to an adapter channel 8 through which the individual fibers 11 can move. The fibers 11 are stretched further, particularly along the inclined walls 32 of the rotor cup 30, until they reach a rotor groove 13, where they can aggregate into a filament that can be pulled out of the rotor cup 30 via a filament take-up mechanism, which is not shown here for clarity.

[0042] The fibers 11 are first fed to a dissolving roller (not shown) by means of a fiber belt (not shown), by which they can be separated from the fiber belt and thus singulated. These singulated fibers 11 can then be transported in a dissolving roller housing 6 in a laminar flow 52, ​​as shown in Fig. 2Bshown. The fibers 11 are to be fed in particular via a fiber guide channel 7 (and possibly via an adapter channel 8) to a rotor cup 30, as described elsewhere herein.

[0043] There may be embodiments in which a core thread 4 is provided, which could be, for example, an elastane thread, to impart a certain degree of elasticity to the resulting yarn. Pure elastane, however, might be considered insufficiently durable, which is why the elastane thread is wrapped with wrapping fibers. Other properties can also be combined using appropriate blended yarns. The combination shown here serves as an example.

[0044] The core yarn 4 can be fed into the fiber guide channel 7, particularly immediately after the dissolving roller housing 6, in a transition area 31, by means of a core yarn feeder 29. By guiding the core yarn 4 through a transition area 31, the path along which the core yarn 4 and the individual fibers 11 are guided together can be lengthened, which improves the wrapping of the core yarn 4 with fibers 11 and thus the yarn quality at the end of the process 300, as described in Fig. 4 The example shown and described in this regard can be improved.

[0045] The core thread 4 can be driven by means of a compressed air supply 3, alternatively or additionally by means of a core thread roller 5, which rotates in a direction of rotation 28, in particular actively driven, in order to initiate and maintain a core thread movement direction 9 which aligns itself with the airflow for the transport of the individual fibers 11 at least in the area of ​​the fiber guide channel 7.

[0046] Fig. 2A Figure 1 shows a sectional view of an exemplary embodiment of a housing 2 of a dissolving roller housing 6 with a coupled fiber guide channel 7 and flow contour 40. The flow contour 40 is specifically designed as a bulge shape 41 to ensure a laminar airflow 52, ​​as is the case in Fig. 2BIn connection with a schematic representation of a flow profile in an exemplary embodiment of a dissolving roller housing 6 with a coupled fiber guide channel 7, but without a flow contour 40, a boundary flow 51 may exist, from which a turbulent flow 50 can develop in an outward direction, particularly along a flow velocity gradient. This turbulent flow can occur in a transition region 31 if no flow contour 40 is provided. Therefore, the insertion of the flow contour 40, which is formed with a surface particularly along the shape of the laminar flow, can limit, if not completely prevent, the occurrence of turbulent flows 50. The flow 52 in the dissolving roller housing 6 can also encounter a counterflow 54 from the dissolving roller housing 6, which can result in flow deceleration 53.

[0047] Fig. 3Figure 1 shows a sectional view of an exemplary embodiment of a dissolving roller housing 6 with an attached fiber channel 7, which can in particular be designed in multiple sections, wherein a flow contour 40 is formed and arranged to form part of the core filament feed 29 within it. This allows the core filament 4 to be introduced into the fiber guide channel 7 through an insert 55, which can in particular be laterally guided by a lateral guide 56, in particular coaxially, thereby making it possible to generate minimal turbulence in the fiber guide channel 7.

[0048] Fig. 4Figure 3 shows a schematic representation of an exemplary embodiment of a method 300. The method 300 can include the step 310 of feeding a fiber strip to a dissolving roller housing 6. The method 300 can include the step 320 of dissolving and singulating fibers 11 from the fiber strip. This can be done, in particular, by the dissolving roller, which can be rotatably mounted in the dissolving roller housing 6. During singulation, the singulated fibers 11 are drawn into the fiber guide channel 7, making it possible to combine them with a core yarn 4 and feed them to a spinning rotor 10 330. In the spinning rotor 10, a spinning step 340 can be carried out in which the fibers 11 are spun into a yarn in a rotor groove 13, whereby the fibers 11 can form wrapping fibers that can wrap around the core yarn 4.

[0049] The term "may" refers in particular to optional features of the invention. Accordingly, there are also further developments and / or embodiments of the invention that additionally or alternatively include the respective feature(s).

[0050] From the combinations of features disclosed herein, isolated features can also be selected as needed and, by dissolving any structural and / or functional relationship that may exist between the features, used in combination with other features to define the subject matter of the claim. Reference symbol list

[0051] 2 Housing 41 Bulge shape 3 Compressed air supply 50 turbulent flow 4 core thread 51 boundary current 5 Core thread roller 52 laminar flow 6 Dissolving roller housing 53 Flow slowdown 7 Fiber optic channel 54 counter-current 8 Adapter channel 55 Mission 9 Core filament movement direction 56 lateral guidance 10 Spin rotor 100 textile machine 11 isolated fibers 200 Rotor spinning machine 12 Channel plate adapter 300 Proceedings 13 Rotor groove 310 Feeding a core thread 28 Direction of rotation 320 Singling of fibers 29 Core thread feed 330 Feeding a core thread to bring fibers and core thread together 30 Rotor cup 31 Transition area 32 sloping walls of the spinneret 340 Spiders 40 Flow contour

Claims

1. Textile machine (100), in particular rotor spinning machine (200), comprising a dissolving roller housing (6) for enclosing a dissolving roller for dissolving a fiber sliver into largely separated fibers (11) and a fiber guide channel (7), wherein the fiber guide channel (7) is arranged on the dissolving roller housing (6) in such a way as to discharge the largely separated fibers (11) from the dissolving roller housing (6) and to supply them to a spinning rotor (10), characterized by the fact that a core yarn feeder (29) is arranged and designed to introduce a core yarn (4) at a transition area (31) between the dissolving roller housing (6) and the fiber guide channel (7) into the fiber guide channel (7) at the inlet of the fiber guide channel (7) in order to feed the core yarn (4) through the fiber guide channel (7) to the spinning rotor (10).

2. Textile machine (100) according to claim 1, characterized by the fact that a bulge shape (41) is arranged at the transition area (31) between fiber guide channel (7) and dissolving roller housing (6).

3. Textile machine (100) according to claim 2, characterized by the fact that the bulge shape (41) is designed and arranged as a flow contour (40) to contain a laminar airflow in the transition area (31).

4. Textile machine (100) according to one of claims 2 or 3, characterized by the fact that the bulge shape (41) has a guide for the core thread (4).

5. Textile machine (100) according to one of claims 2 to 4, in particular according to claim 4, characterized by the fact that the guide for the core thread (4) in the bulge shape (41) encompasses the core thread (4) over a length of the core thread (4) in the thread guidance direction.

6. Textile machine (100) according to one of the preceding claims, characterized by the fact that the core thread feeder (29) is designed and arranged to feed the core thread (4) at the entrance of the fiber guide channel (7) in the axial direction of the fiber guide channel (7) to the fiber guide channel (7).

7. Textile machine (100) according to one of the preceding claims, characterized by the fact thatat least one separate component is designed to be guided as an insert (55), in particular laterally, in order to arrange at least one of the flow contour (40), the core thread feed (29) or the transition area (31).

8. Method (300) comprising the step of: - feeding (310) a core yarn (4) to a fiber guide channel (7) in a transition area (31) between dissolving roller housing (6) and fiber guide channel (7) at the inlet of the fiber guide channel (7) of a textile machine (100) according to one of claims 1 to 7.

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