Open-end spinning device

Abstract

The invention relates to an open-end spinning device for the selective production of a Z- and S-yarn, with a spinning rotor rotatably mounted in a vacuum-loaded spinning rotor housing and a drive unit that drives the spinning rotor selectively in a left- and right-hand rotation.In order to provide an open-end spinning device for the optional production of a Z-yarn and S-yarn, which enables a consistently high yarn quality of both yarn types, an opening roller which can be driven to rotate left and right in accordance with the direction of rotation of the spinning rotor, as well as a Z-yarn fiber guide channel and an S-yarn fiber guide channel, which optionally connect the opening roller to the spinning rotor in a fiber-guiding manner and which each have a fiber outlet opening assigned to the spinning rotor and a fiber inlet opening assigned to the opening roller, wherein the fiber inlet opening and fiber outlet opening of the Z-yarn fiber guide channel are adjacent to the spinning rotor and the opening roller on the left and of the S-yarn fiber guide channel on the right.

Description

[0001] The invention relates to an open-end spinning device for selectively producing a Z- and S-yarn, with a spinning rotor rotatably mounted in a vacuum-loaded spinning rotor housing and a drive unit that drives the spinning rotor either left- or right-handed.

[0002] Open-end spinning devices with rotatably mounted spinning rotors are known in a variety of designs from the prior art. These spinning rotors typically feature a rotatably mounted rotor shaft with a rotor cup arranged at one end of the rotor shaft. The spinning rotor can be driven in either a left- or right-hand rotation at high speed by means of a drive unit that drives the rotor. The drive unit is coupled to the spinning rotor for this purpose.

[0003] To produce an S-twisted or Z-twisted yarn, hereinafter referred to as Z-yarn and S-yarn, the spinning rotor of the open-end spinning device can be driven via the drive unit to rotate either left- or right-handed, wherein in the context of the present application, left-handed rotation is understood to mean a counterclockwise rotation of the spinning rotor and an opening roller of the open-end spinning device and right-handed rotation is understood to mean a clockwise rotation of the spinning rotor and the opening roller - in each case based on a frontal plan view of the end of the spinning rotor of the open-end spinning device carrying the rotor cup.

[0004] A key aspect of producing Z- and S-yarns is that the fiber material released by an opening roller is fed into the spinning rotor or its rotor cup via a fiber guide channel in the direction of rotation. To produce a Z-yarn, the individual fibers released by the opening roller must be introduced clockwise into the rotor cup via the fiber guide channel, whereas to produce an S-yarn, the fiber material is fed counterclockwise into the rotor cup. Based on the typically intended installation position of the opening roller below the spinning rotor in the operating position of the open-end spinning device, when producing a Z-yarn, the fiber guide channel with a fiber outlet opening is connected to the spinning rotor on the left side - relative to the rotor axis - in the frontal plan view of the end carrying the rotor cup, and when producing an S-yarn, it is connected to the spinning rotor on the right side.

[0005] In order to ensure that the fiber material is fed into the spinning rotor in a direction corresponding to the direction of rotation of the spinning rotor when the opening rollers can only be driven in one direction of rotation, it is known from DE 198 41 406 A1 to provide the fiber guide channel with a fiber guide channel adapter which, depending on the yarn to be produced, enables left-hand or right-hand feeding into the spinning rotor, depending on the direction of rotation of the spinning rotor. If a straight fiber guide channel is used to produce a Z-yarn, a fiber guide channel adapter is required to use it to produce an S-yarn, but this changes the course of the fiber guide channel so that it no longer has a straight course. If a fiber guide channel adapter is used to produce an S-yarn, the non-straight course results in a deterioration in the yarn quality.

[0006] Based on this, the invention is based on the object of providing an open-end spinning device for the selective production of a Z- and S-yarn, which enables a consistently high yarn quality of both yarn types.

[0007] The invention solves the problem by an open-end spinning device having the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

[0008] Characteristic of the spinning device according to the invention is an opening roller which can be driven in a left-hand and right-hand direction according to the direction of rotation of the spinning rotor, as well as a Z-yarn fibre guide channel and an S-yarn fibre guide channel which optionally connect the opening roller to the spinning rotor in a fibre-guiding manner and which each have a fibre outlet opening assigned to the spinning rotor and a fibre inlet opening assigned to the opening roller, wherein the fibre inlet and fibre outlet opening of the Z-yarn fibre guide channel are adjacent to the spinning rotor and the opening roller on the left-hand side and of the S-yarn fibre guide channel are adjacent to the right-hand side.

[0009] The direction of rotation of the opening roller determines the transport direction of the fibers released by the opening roller. These fibers enter the fiber inlet opening of the fiber guide channel and are introduced into the spinning rotor via the fiber outlet opening. The fiber inlet opening of the fiber guide channel is therefore arranged on the opening roller in such a way that the released fibers enter the fiber guide channel via the fiber inlet opening due to the direction of rotation of the opening roller.

[0010] The opening roller's rotation direction can be selected to correspond to the rotation direction of the spinning rotor, either left or right. This makes it possible to drive the spinning rotor and the opening roller with the same rotation direction. For a clockwise spinning rotor used to produce a Z-yarn, the opening roller rotates correspondingly right. The Z-yarn fiber guide channel then transports the fibers from the opening roller to the spinning rotor. Its fiber inlet opening is located on the opening roller in the direction of rotation of the opening roller, and its fiber outlet opening feeds the fibers into the spinning rotor in the direction of rotation of the spinning rotor.

[0011] In relation to a position of use in which the opening roller is arranged below the spinning rotor, the Z-yarn fiber guide channel with its fiber inlet and fiber outlet opening is arranged on the left side of the spinning rotor and the opening roller, wherein in the context of the present application the terms "left side" and "right side" refer to a plan view of the open-end spinning device directed towards the end of the spinning rotor having the rotor cup.

[0012] When producing an S-yarn, a left-rotating drive of the spinning rotor is required. To feed the fiber material into the spinning rotor in the direction of rotation, an S-yarn fiber guide channel is used. This channel, with its fiber inlet and fiber outlet openings, is located on the right side of the opening roller and the spinning rotor. This allows the fibers released by a left-rotating opening roller to be introduced from the fiber inlet opening arranged in the direction of rotation via the fiber guide channel and into the left-rotating spinning rotor via the fiber outlet opening.

[0013] The open-end spinning device according to the invention enables the selective production of a Z-yarn and an S-yarn. Depending on the yarn to be produced, in addition to the necessary adjustment of the spinning rotor's rotational direction, the opening roller also rotates in a manner corresponding to the spinning rotor. To ensure reliable and consistent introduction of the fiber material into the spinning rotor, depending on the yarn to be produced, it is possible to use either a Z-yarn fiber guide channel or an S-yarn fiber guide channel for the fiber-conducting connection of the opening roller to the spinning rotor, depending on the direction of rotation of the spinning rotor and the opening roller.

[0014] The orientation of the fiber outlet opening allows for optimal introduction of the fiber material into the spinning rotor, so that high-quality Z- and S-yarn can be produced with the open-end spinning device according to the invention. The optional use of a Z-yarn fiber guide channel and an S-yarn fiber guide channel makes it possible to align them in a straight line, thereby ensuring a particularly consistent and continuous fiber flow for high yarn quality. When changing the open-end spinning device from S-yarn production to Z-yarn production, it is only necessary to change the direction of rotation of the spinning rotor, change the direction of rotation of the opening roller, and replace the fiber guide channel. Overall, the open-end spinning device according to the invention thus has a high degree of variability and offers the possibility of producing Z-yarn and S-yarn with consistently high quality.

[0015] In principle, it is possible to design the open-end spinning devices in such a way that either an S-yarn fiber guide channel or a Z-yarn fiber guide channel can be used for the fiber-conducting connection of the opening roller to the spinning rotor. However, according to a particularly advantageous embodiment of the invention, the fiber guide channels are each arranged on a cover element that can be detachably attached to the spinning rotor housing.

[0016] The cover element is designed both to cover the spinning rotor housing containing the spinning rotor and preferably also to accommodate the opening roller. Depending on the yarn to be produced, it has an S-yarn fiber guide channel or a Z-yarn fiber guide channel. The use of an exchangeable cover element ensures that the open-end spinning device is specifically tailored to the respective direction of rotation of the spinning rotor and the opening roller. The cover elements can be optimally adapted to the geometric conditions of the open-end spinning device, thus ensuring the particularly reliable production of high-quality Z- or S-yarn with consistent quality. Extensive conversion measures and equipment can be omitted if necessary.

[0017] According to a further embodiment of the invention, opening rollers adapted to the fiber guide channels are each rotatably mounted on the cover elements. According to this embodiment of the invention, the opening roller required for opening the fibers from the fiber sliver and for transporting the released fibers into the fiber inlet opening of the fiber guide channel is also rotatably mounted on the two optionally usable cover elements, each having an S-yarn fiber guide channel or a Z-yarn fiber guide channel. This embodiment of the invention makes it possible to optimally coordinate the fiber guide channel and the opening roller, which is coupled to an opening roller drive in the assembled position of the cover elements on the open-end spinning device, and to combine them on the replaceable cover element.The opening roller drive can also be designed as a separate drive and arranged on the replaceable flat elements. Converting the open-end spinning device from S-yarn production to Z-yarn production is facilitated in a complementary manner by the flat elements, which are advantageously equipped with the opening rollers.

[0018] According to a further embodiment of the invention, it is further provided that the cover elements each have a fiber sliver feed device assigned to the opening roller, which is adjacent to the opening roller on the right side of the cover element having the Z-yarn fiber guide channel and on the left side of the cover element having the S-yarn fiber guide channel.

[0019] According to this embodiment of the invention, the elements of the fiber sliver feed device, such as a fiber sliver feed cylinder, a feed trough, and a fiber sliver compressor, by means of which the fiber sliver is fed to the opening roller, are arranged opposite the fiber inlet opening of the fiber guide channel on the opening roller. The fiber sliver is conveyed into a feed opening of the opening roller housing via the fiber sliver feed cylinder, which is driven in the same direction of rotation as the opening roller, and there engages the opening roller, which releases the fibers from the fiber sliver. Contaminants from the fiber sliver resulting from the spinning process can be reliably removed via the fiber sliver conveying path, which runs through a lower apex of the opening roller between the feed opening for the fiber sliver and the fiber inlet opening of the fiber guide channel—relative to the installation position of the cover element on the open-end spinning device.

[0020] The design of the advantageously provided cover elements is fundamentally freely selectable. For example, they can be formed integrally with the fiber guide channel or in multiple pieces. According to a particularly advantageous embodiment of the invention, the fiber outlet opening of the Z-yarn fiber guide channel and / or the S-yarn fiber guide channel is formed on a fiber guide channel adapter that can be detachably connected to the cover element. According to this embodiment of the invention, the fiber guide channel is formed integrally or in multiple pieces with the cover element. The fibers are introduced into the spinning rotor via a fiber guide channel adapter that is connected to the fiber guide channel and has the fiber outlet opening. This embodiment of the invention therefore makes it possible, when using advantageously provided cover elements, to optimally adapt them to the spinning operation using replaceable fiber guide channel adapters. For example,Depending on the fiber material used, it can be ensured in a particularly reliable manner that the individual fibers enter the spinning rotor at a defined angle.

[0021] It is particularly advantageous that the fiber guide channel adapter is arranged in an exchangeable manner in a receiving opening of the cover element, so that the fiber outlet opening can be adapted to the spinning rotor in order to ensure in a particularly reliable manner that the spinning process is carried out in an optimal manner.

[0022] In addition to the advantageously provided use of two cover elements, one of which is designed with a Z-yarn fiber guide channel and the other with an S-yarn fiber guide channel, and which can be arranged interchangeably on the open-end spinning device depending on the yarn to be produced, a further development of the invention provides that one cover element has receiving openings for optionally receiving a Z-yarn fiber guide channel and an S-yarn fiber guide channel. This embodiment of the invention enables the use of a cover element which is designed to optionally receive a Z-yarn fiber guide channel and an S-yarn fiber guide channel. To change the open-end spinning device between S-yarn production and Z-yarn production, according to this embodiment of the invention it is then only necessary to replace the fiber guide channel on the cover element, which has suitable openings for this purpose.The unused opening can then be closed, with suitable closure means being provided for this purpose. Compared to completely replacing the cover elements, replacing the fiber guide channels offers the advantage that the storage space for the unused components, in this case fiber guide channels, is reduced compared to the storage space for complete cover elements. Particularly preferably, the cover element has both a fiber sliver feed device arranged on the left and right side adjacent to the opening roller for optionally accommodating the S-yarn and Z-yarn fiber guide channels, so that appropriate fiber sliver feeding can be ensured depending on the fiber guide channel used.

[0023] According to a further embodiment of the invention, the cover element for producing an S-yarn has a mirror-symmetrical structure to the cover element for producing a Z-yarn. According to this embodiment of the invention, the cover element not only has a mirror-symmetrical shape, but also the components possibly present on the cover element for producing an S-yarn are arranged in a mirror-symmetrical manner on the cover element for producing a Z-yarn. In addition to the fiber guide channels, the components of the fiber sliver feed device and - if present - the fiber guide channel adapters and receiving openings on the cover element.

[0024] By this embodiment of the invention, according to which the cover elements have a mirror-symmetrical structure preferably with respect to a vertical plane preferably through the vertical center of the open-end spinning device, so that the fiber sliver feed device and the fiber inlet opening of the fiber guide channels of the two cover elements are mirror-symmetrically adjacent to the opening roller and the fiber outlet openings of the fiber guide channels of the two cover elements are mirror-symmetrically adjacent to the spinning rotor, it is particularly ensured that the Z-yarn and the S-yarn can be produced with a matching quality on the convertible open-end spinning device.

[0025] To open the fiber sliver fed to the opening roller, the latter preferably has a clothing carrier which engages with the fed fiber sliver and releases the fibers. According to a further embodiment of the invention, the opening roller can be selectively detachably connected to a Z-yarn clothing carrier and an S-yarn clothing carrier. This embodiment of the invention makes it possible to optimally design the opening roller according to the yarn to be produced, so that the clothing carrier ensures the desired release of the fibers from the fed fiber sliver according to the direction of rotation of the opening roller. In addition to changing the clothing carrier depending on the yarn to be produced with the open-end spinning device, the detachable connection of the clothing carrier to the opening roller also allows optimal adaptation to the fed fiber material and, for example,In case of wear and tear, the fitting carrier can be easily replaced.

[0026] According to a particularly advantageous embodiment of the invention, the clothing carrier can be connected to the opening roller by means of a quick-clamping mechanism. This design particularly facilitates conversion of the opening roller. After changing the clothing carrier, which can be carried out easily and time-savingly thanks to the advantageously provided quick-clamping mechanism, it can be used directly for the production of a Z-yarn or S-yarn.

[0027] Embodiments of the invention are explained below with reference to the drawings. In the drawings: Fig. 1a is a schematic representation of a perspective view of an open-end spinning device prepared for the production of an S-yarn; Fig. 1b is a schematic representation of a perspective view of the open-end spinning device of Fig. 1a for producing a Z-yarn; Fig. 2a in a schematic representation a perspective view of a section of the open-end spinning device of Fig. 1a ; Fig. 2b shows a schematic representation of a perspective view of a section of the open-end spinning device of Fig. 1b ; Fig. 3a in a schematic representation a plan view of the open-end spinning device of Fig. 1a and Fig. 3b shows a schematic representation of a plan view of the open-end spinning device of Fig. 1b .

[0028] Figure 1a and Figure 1bshow in a schematic representation, representing the basic structure, a perspective view of an open-end spinning device 1, in two setup states, each with a different cover element 10a, 10b for producing an S-yarn ( Figure 1a ) and a Z-yarn ( Figure 1b ).

[0029] The open-end spinning device 1, which can be used optionally for the production of either yarn type, has a spinning rotor housing 2 in which a rotor cup 4 of a spinning rotor 3 rotates at high speed, driven by a drive unit (not shown here). The spinning rotor 3 is driven by an electric motor (not shown here). Depending on the direction of rotation of the electric motor, the spinning rotor 3 can thus be driven either anticlockwise or clockwise, with anticlockwise rotation meaning counterclockwise rotation of the spinning rotor 3 and clockwise rotation meaning clockwise rotation of the spinning rotor 3 - each with reference to the diagrammatically illustrated frontal view of the end of the spinning rotor 3 of the open-end spinning device 1 carrying the rotor cup 4.During spinning operation, the spinning rotor housing 2 is closed by a cover 22a, 22b connected to a cover element 10a, 10b via a fiber guide channel 6a, 6b, so that a spinning vacuum necessary for spinning operation can be generated therein.

[0030] Below the spinning rotor 3—referring to the graphic representation of the operating position of the open-end spinning device 1—the cover element 10a for producing an S-yarn or the cover element 10b for producing a Z-yarn is arranged on the open-end spinning device 1. The cover elements 10a, 10b each have a fiber sliver opening device 12. This device has an opening roller housing 11, an opening roller 5 rotatably mounted within the opening roller housing 11, and a fiber sliver feed device. The fiber sliver feed device consists of a fiber sliver intake cylinder 13, on which a feed trough 14, which is rotatably mounted about a pivot axis 15, can be adjusted. A fiber sliver compactor 16 is also arranged on the feed trough 14.In the cover element 10a for producing an S-yarn, the fiber sliver feed is arranged on the left side of the opening roller 5 on the cover element 10a, whereas in the cover element 10b for producing a Z-yarn, the fiber sliver feed is arranged on the right side of the opening roller 5. The fiber sliver is transported into the opening roller housing 11 via the fiber sliver feed cylinder 13, which rotates in the same direction as the opening roller 5.

[0031] To release the fibers 21 from the supplied fiber sliver, the opening roller 5 has a replaceable clothing carrier 9a, 9b, which is designed according to the yarn to be produced and the direction of rotation of the opening roller 5. Depending on the yarn to be produced, the transport of the released fibers 21 from the opening roller 5 to the spinning rotor 3 takes place optionally via an S-yarn fiber guide channel 6a or a Z-yarn fiber guide channel 6b, which are each connected to the cover elements 10a, 10b.

[0032] The spinning rotor housing 2 and the opening roller housing 11 can be connected to one another in a fiber-conducting manner via the fiber guide channels 6a, 6b, wherein the released fibers, after entering the fiber inlet opening 8a, 8b, are guided through the through openings 19a, 19b that channel the fiber guide channels 6a, 6b longitudinally and are introduced into the rotor cup 4 from the fiber outlet openings 7a, 7b in the area of the spinning rotor 3.

[0033] During yarn production, the direction of rotation of the opening roller 5 about its axis of rotation 17 corresponds to the direction of rotation 20a, 20b of the spinning rotor 3 about its axis of rotation 18. Figures 1a , 2a and 3aIn the open-end spinning device 1 shown, which is equipped with the cover element 10a for producing an S-yarn, the spinning rotor 3 is connected to the opening roller 5 via an S-yarn fiber guide channel 6a, wherein the S-yarn fiber guide channel 6a is arranged on the cover element 10a, which can be exchangeably arranged on the open-end spinning device 1. In the mounted position of the cover element 10a, the S-yarn fiber guide channel 6a borders on the right-hand side - based on the illustration in Figures 1a , 2a and 3a - to the spinning rotor 3 and the opening roller 5. By means of the opening roller 5, which rotates counterclockwise in accordance with the direction of rotation 20a of the opening roller 5 and is connected to a clothing carrier 9a, the fibers 21 released by the opening roller 5 are fed through the S-yarn fiber guide channel 6a in the direction of rotation into the spinning rotor 3.

[0034] To convert the open-end spinning device 1 to produce a Z-yarn, the cover element 10a is replaced by the cover element 10b, which has a mirror-symmetrical structure to the cover element 10a with respect to the fiber sliver feed device and the fiber guide channels 6a, 6b (cf. Figures 1b , 2b and 3b ). The direction of rotation of the spinning rotor 3 and the opening roller 5 is reversed, so that their direction of rotation 20b—relative to the graphic representation—is clockwise. The fibers 21 then released by the opening roller 5 are fed into the spinning rotor 3 through the Z-yarn fiber guide channel 6b. List of reference symbols

[0035] 1Open-end spinning device 2Spinning rotor housing 3Spinning rotor 4Rotor cup 5Opening roller 6aS-yarn fiber guide channel 6bZ-yarn fiber guide channel 7aFiber outlet opening (S-yarn fiber guide channel) 7bFiber outlet opening (Z-yarn fiber guide channel) 8aFiber inlet opening (S-yarn fiber guide channel) 8bFiber inlet opening (Z-yarn fiber guide channel) 9aClothing carrier (S-yarn) 9bClothing carrier (Z-yarn) 10aCover element (S-yarn) 10bCover element (Z-yarn) 11Opening roller housing 12Sliver opening device 13Sliver feed cylinder 14Feed trough 15Swivel axis 16Sliver compactor 17Rotational axis (opening roller) 18Rotational axis (spinning rotor) 19aThrough opening (S-yarn fiber guide channel) 19bThrough opening (Z-yarn fiber guide channel) 20aDirection of rotation (S-yarn) 20bDirection of rotation (Z-yarn) 21Fibers 22aCover (S-yarn) 22bCover (Z-yarn)

Claims

1. Open-end spinning device (1) for the selective production of a Z- and S-yarn, with - a spinning rotor (3) rotatably mounted in a vacuum-loaded spinning rotor housing (2) and - a drive unit driving the spinning rotor (3) selectively in a left-hand and right-hand rotation, characterized by - an opening roller (5) which can be driven to rotate left and right in accordance with the direction of rotation of the spinning rotor (3), and - a Z-yarn fibre guide channel (6b) and an S-yarn fibre guide channel (6a), which optionally connect the opening roller (5) to the spinning rotor (3) in a fibre-guiding manner and which each have a fibre outlet opening (7a, 7b) assigned to the spinning rotor (3) and a fibre inlet opening (8a, 8b) assigned to the opening roller (5), the fibre inlet opening (8a, 8b) and the fibre outlet opening (7a, 7b) of the Z-yarn fibre guide channel (6b) being adjacent to the left-hand side and of the S-yarn fibre guide channel (6a) being adjacent to the right-hand side of the spinning rotor (3) and the opening roller (5).

2. Open-end spinning device (1) according to claim 1, characterized in that the fiber guide channels (6a, 6b) are each arranged on a cover element (10a, 10b) which can be detachably arranged on the spinning rotor housing (2).

3. Open-end spinning device (1) according to claim 1 or 2, characterized in that opening rollers (5) adapted to the fiber guide channels (6a, 6b) are each rotatably mounted on the cover elements (10a, 10b).

4. Open-end spinning device (1) according to one or more of the preceding claims, characterized in that the cover elements (10a, 10b) each have a fiber sliver feed device assigned to the opening roller (5), which is adjacent to the opening roller (5) on the right side of the cover element (10b) having the Z-yarn fiber guide channel (6b) and on the left side of the cover element (10a) having the S-yarn fiber guide channel (6a).

5. Open-end spinning device (1) according to one or more of the preceding claims, characterized in thatthe fiber outlet opening (7a, 7b) of the Z-yarn fiber guide channel (6b) and / or the S-yarn fiber guide channel (6a) is formed on a fiber guide channel adapter that can be detachably connected to the cover element (10a, 10b).

6. Open-end spinning device according to claim 5, characterized in that the fiber guide channel adapter for adapting the fiber outlet opening (7a, 7b) relative to the spinning rotor (3) is arranged in a receiving opening of the cover element (10a, 10b) in an exchangeable manner.

7. Open-end spinning device according to one or more of the preceding claims, characterized in that the cover element (10a, 10b) has receiving openings for selectively receiving the Z-yarn fiber guide channel (6b) and the S-yarn fiber guide channel (6a).

8. Open-end spinning device (1) according to one or more of the preceding claims, characterized in that the cover element (10a) for producing an S-yarn has a mirror-symmetrical structure to the cover element (10b) for producing a Z-yarn.

9. Open-end spinning device (1) according to one or more of the preceding claims, characterized by a Z-yarn clothing carrier (9b) and an S-yarn clothing carrier (9a), which can be optionally detachably connected to the opening roller (5).

10. Open-end spinning device (1) according to claim 9, characterized in that the clothing carriers (9a, 9b) can be connected to the opening roller (5) by means of a quick-release mechanism.

Images