CN115676511A

CN115676511A - Wire tensioner, operating point and method

Info

Publication number: CN115676511A
Application number: CN202210859482.0A
Authority: CN
Inventors: A·斯蒂芬; 克里斯汀·凯特纳; 杰拉尔德·屈斯特斯
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2021-07-21
Filing date: 2022-07-21
Publication date: 2023-02-03
Also published as: EP4122859A1; DE102021118857A1

Abstract

The invention relates to a thread tensioner (10) for a working point (1) of a textile machine, preferably a winding machine, for rewinding a thread (2) from a first sleeve (3), preferably a spinning sleeve, onto a second sleeve (4), preferably a winding sleeve, wherein the thread tensioner (10) has a tensioning device (11) for adjusting a thread tension of the moving thread (2), wherein the thread tensioner (10) comprises a first drive (16) by means of which the thread tension generated by the tensioning device (11) can be adjusted, wherein the thread tensioner (10) comprises a pre-cleaner (19) for eliminating, restraining or unwinding certain thread defects, and wherein the pre-cleaner (19) has a passage opening (20) for the thread (2). The thread tensioner (10) also comprises a second drive (21), by means of which the shape and/or size of the passage opening (20) can be changed if necessary. The invention further relates to a working point (1) of a textile machine having such a thread tensioner (10) and to a corresponding method for influencing a moving thread (2) at a working point (1) of a textile machine.

Description

Wire tensioner, operating point and method

Technical Field

The invention relates to a thread tensioner for an operating point of a textile machine, preferably a winding machine, for rewinding a thread from a first sleeve (in particular a spinning sleeve) onto a second sleeve (in particular a winding sleeve), wherein the thread tensioner has a tensioning device for adjusting a thread tension of the moving thread, wherein the thread tensioner comprises a first drive by means of which the thread tension generated by the tensioning device can be adjusted, wherein the thread tensioner comprises a precleaner for eliminating, restraining or unraveling a defined thread defect, and wherein the precleaner has a passage opening for the thread. The invention further relates to an operating point of a textile machine, preferably a winding machine, for rewinding a yarn from a first sleeve (in particular a spinning sleeve) onto a second sleeve (in particular a winding sleeve), wherein the operating point has a yarn tensioner. The invention further relates to a method for influencing a running yarn at an operating point of a textile machine, preferably a winding machine, by means of which the yarn is rewound from a first sleeve, preferably a spinning sleeve, onto a second sleeve, preferably a winding sleeve. The yarn passes through a precleaner with a passage opening for the yarn, by means of which a defined yarn defect is to be eliminated, bound or unraveled. Furthermore, after passing through the precleaner, the thread passes through a tensioning device having a first drive, by means of which the thread tension of the thread is adjusted.

Background

Such thread tensioners, operating points with thread tensioners and methods for adjusting a running thread have been known for a long time. The thread tensioner is used to adjust the tension of the thread during the rewinding process, in particular on winding machines which wind the thread onto a bobbin or a winding sleeve from a spinning sleeve, for example supplied by a spinning machine. In the case of a yarn tension that is too low, winding errors can occur on the spool, knots can form or the yarn can break.

The following may also occur: when the yarn is drawn off from the first sleeve at high speed, individual knots or a pile of knots are formed, which are transported as a package in the direction of the yarn tensioner. Without proper measures to untwist these knots, a number of problems arise in the winding machine. By having a precleaner defining a passage opening, such yarn defects can be unraveled before they enter the yarn tensioner. However, the precleaner of the known thread tensioner has the disadvantage that the passage opening cannot be changed only by hand and/or only together with the tensioning device. Therefore, such precleaners cannot be adapted or are difficult to adapt to changing conditions on the textile machine.

Disclosure of Invention

The object of the present invention is to overcome the above-mentioned disadvantages of the known yarn tensioners.

The object is solved by a thread tensioner, an operating point and a method having the features of the independent patent claims.

The thread tensioner according to the invention for a working point of a textile machine, preferably a winding machine, for rewinding a thread from a first sleeve, in particular a spinning sleeve, onto a second sleeve, in particular a winding sleeve, has a tensioning device for adjusting the thread tension of the moving thread. The thread tensioner also comprises a first drive, by means of which the thread tension generated by the tensioning device can be adjusted, and a precleaner for removing, restraining or unraveling certain thread defects, wherein the precleaner has a passage opening for the thread. Furthermore, the thread tensioner can comprise a second drive, by means of which the shape and/or the size of the passage opening can be changed if necessary.

By means of the second drive, the precleaner can be adapted to changing conditions on the textile machine. Furthermore, the precleaner can be replaced independently of the tensioning device. This means that the yarn tension and the cleaning properties of the precleaner can be controlled independently of one another and, for example, the properties of the rewound yarn can be adapted. The shape and/or size of the passage opening of the precleaner determine, for example, which yarn defects are to be detected by the precleaner or which loads are to be applied to the yarn by the precleaner. The separate arrangement of the precleaner can thus have a positive effect on the yarn quality of the rewound yarn.

Advantageously, the tensioning device comprises a first tensioner element and a second tensioner element, wherein the first tensioner element and the second tensioner element are movable relative to each other by means of a first drive in order to thereby adjust the thread tension of the thread moving between the first tensioner element and the second tensioner element. The thread tension can be set very precisely by means of the first and second tensioner elements.

Preferably, the first and second tensioner elements have elements that engage each other like a comb. These elements are designed, for example, as rods or bars. Comb-like engagement with one another means, for example, that the elements engage one another in a form-locking manner, but still leave intermediate spaces for the passage of the yarns. The friction force and thus the thread tension on the thread tensioner is controlled in particular by controlling the mutual pressure of the elements on the thread as a function of an increase or decrease in the position of the first and second tensioner elements relative to one another, or by changing the wrap angle by the relative position of the elements relative to one another. For example, the elements may have rounded edges to avoid damaging the yarn.

For example, the first drive can be designed to move both the first tensioner element and the second tensioner element. Preferably, however, only one of the tensioner elements can be moved by the first drive. The relative position of the tensioner elements is then determined by the movement of only one of the tensioner elements. The drive is designed in particular to move the tensioner elements linearly relative to one another. It is conceivable to provide the first tensioner element with a first drive and to provide the second tensioner element with a further first drive.

It is particularly advantageous if the first tensioner element and the second tensioner element each have a plurality of tensioner segments which are preferably arranged alternately with one another and together define a yarn path for the yarn. Thus, for example, the tensioner segments can be serviced independently of one another or replaced as wear parts. For example, the tensioner section can also be formed as a separate elastic unit. As already described, the elements of the tensioner sections preferably interlock with each other in a comb-like manner. The pressure applied to the yarn on both sides or the wrap angle of the yarn will here control the friction on the tensioner section and thus the yarn tension.

The tensioner sections of the first and second tensioner elements are preferably arranged parallel to each other. As a result, the yarn path or the width of the yarn path can be changed linearly when the tensioner elements are moved relative to one another. For example, the first and second tensioner elements each have two tensioner sections. Each tensioner section has, for example, a plurality of elements already described. In particular, each tensioner section has three elements.

Advantageously, the precleaner has a first restriction element and a second restriction element, wherein the first restriction element and the second restriction element are movable relative to each other by means of a second drive. The passage opening may be precisely defined by the first restriction element and the second restriction element. The size of the passage opening is defined here, for example, by the edge of the constraining element. The constraining elements may, for example, at least partially overlap. Here, the constraining elements are arranged, for example, offset and overlapping each other.

The channel opening may for example consist of a first recess in the first restriction element and a second recess in the second restriction element. On the other hand, the passage opening may also be provided by a recess in only one of the restriction elements. The size of the passage opening can be varied by relative movement of the restraining elements. The shape of the passage opening can also be varied, for example by the described asymmetric design of the two recesses, and/or the passage opening is designed with differently shaped sections which are blocked or released due to the relative movement of the constraining elements.

For example, the second driver may be designed to move both the first restriction element and the second restriction element. Preferably, however, only one of the restriction elements is movable by the second driver. The relative position of the constraining elements is then determined by the movement of only one of the constraining elements. The drive is designed in particular to move the constraining elements linearly with respect to one another. It is conceivable to provide a second driver for the first restriction element and another second driver for the second restriction element.

Advantageously, the first drive and/or the second drive are designed as electric motors, preferably as stepping motors, electromagnetic drives or pneumatic drives. Usually, these drives can be controlled very precisely, which means that the tensioning device or the precleaner can be set precisely by means of these drives. Advantageously, the travel path of these drives is regulated by a controller and possibly a corresponding sensor system. The first and second drivers are preferably adjusted independently of each other. It is also conceivable for the first drive and/or the second drive to be designed as a hydraulic drive. For example, the electromagnetic drive may include a magnetic coil system. The first drive and/or the second drive are preferably designed to perform a linear movement.

Advantageously, the first and second drivers are designed to be of the same type. Most importantly, this facilitates control or adjustment of both actuators. In this context, the same type means, for example, that the driver types are the same at least with respect to the first driver and the second driver. However, the drivers may differ, for example, in maximum travel path, delta, and/or power consumption. In particular, the first driver and the second driver may be identical.

Advantageously, the first drive and the second drive are jointly fastened to a support of the thread tensioner. This reduces the number of components of the thread tensioner compared to independent fastening of the drive, thereby reducing the manufacturing costs. Also, for example, the common zero point of the travel paths may be determined therefrom to control the drive. For example, the driver may be arranged so as to at least partially pierce the support to fasten on the support.

It is also advantageous if the first tensioner element is connected to the support directly or by means of at least one holding element, and the second tensioner element is connected to the first drive and can be moved relative to the support by means of the first drive. This creates a stable tensioning device which can easily withstand greater loads. The forces acting on the first tensioner element are transferred to the support. In this case, the relative movement between the tensioner elements is, for example, only caused by the movement of the second tensioner element. The use of a retaining element allows greater flexibility in the placement and possible subsequent replacement of the first tensioner element.

Advantageously, the first constraint element is connected to the support directly or by means of at least one fixing element, and the second constraint element is connected to the second drive and is movable relative to the support by means of the second drive. Similar to the advantages of the tensioner element described above, a stable precleaner is thereby created which can also withstand greater loads. In this case, too, the relative movement between the constraining elements is produced in this case, for example, by the movement of the second constraining element only. As with the previous retaining elements, the fixing element allows greater flexibility in the placement and possible subsequent replacement of the first constraint element.

The operating point of a textile machine, preferably a winding machine, according to the invention for rewinding a yarn from a first sleeve, in particular a spinning sleeve, onto a second sleeve, in particular a winding sleeve, is distinguished by a yarn tensioner according to the preamble. As already mentioned, the use of the thread tensioner according to the invention can have a positive effect on the quality of the thread rewound at the working point. Above all, independent adjustment of the tensioning device and the precleaner has proven to be advantageous. As already described, the precleaner can be easily adapted individually to the possibly expected yarn defect or the properties of the yarn to be rewound by means of the second drive.

In addition to the thread tensioner, the working point also has, for example, a ball delimiter (ballonbergrenzer), at least one thread guide element, a splicer for combining the thread ends, at least one means for positioning and clamping the thread ends, preferably in the form of a pivotable suction tube and a pivoting device (changier vorticichtung), in particular in the form of a grooved roller.

On textile machines, in particular winding machines, a large number of such working points are usually arranged side by side. The textile machine has, for example, a superordinate control which controls the operation of the entire textile machine. Furthermore, the respective operating point can also have a controller which is either subordinate to the superordinate controller or is partially or completely independent of the superordinate controller. At least one of the mentioned controllers may also be operatively connected with the first and/or second driver and control it/them.

In the method according to the invention for influencing a moving yarn at an operating point of a textile machine, preferably a winding machine, by means of which the yarn is rewound from a first sleeve, in particular a spinning sleeve, onto a second sleeve, in particular a winding sleeve, the yarn is passed through a precleaner with a passage opening for the yarn, by means of which a defined yarn defect is to be eliminated, bound or unraveled. After passing through the precleaner, the yarn passes through a tensioning device having a first drive, by means of which the yarn tension of the yarn is adjusted. The method provides that the shape and/or the size of the passage opening can be changed, if necessary, by means of a second drive. Above all, the operating point according to the invention is suitable for performing the method. The advantages already described have a similar effectiveness for this method. The separate arrangement of the pre-cleaner and the tensioning device enables rewinding of the rewound yarn with minimal load before the yarn tensioner passes through and maximum cleaning of yarn faults or knots.

Advantageously, the adjustment of the yarn tension and the change of the shape and/or size of the passage opening can be carried out independently of each other. Since the thread tension set by the tensioning device is not necessarily dependent on the thread defect occurring before the thread tensioner, it is possible on the one hand to set the thread tension separately and on the other hand to adapt the precleaner to a thread defect possibly coming from the first sleeve separately.

Advantageously, the change in the shape and/or size of the passage opening is carried out in such a way that the first restraint element of the precleaner is moved relative to the second restraint element of the precleaner by means of the second drive. Thereby, the precleaner can be designed in a particularly simple and efficient manner. This change in the passage opening is also energetically efficient and wear is small. As already described, the change in shape of the passage opening is effected, for example, by differently shaped sections which are successively blocked or released. For example, only one of the restriction elements may be moved by the second driver, or both restriction elements may be moved by the second driver.

It is also advantageous if the thread tension is set in that the first tensioner element of the tensioning device and the second tensioner element of the tensioning device are moved relative to each other by means of a first drive, wherein the thread is moved between the first tensioner element and the second tensioner element. The tensioning device can thereby be designed in a particularly simple and effective manner. Energy efficiency and low-wear operation are also involved here. For example, only one of the tensioner elements may be moved by the first drive, or both tensioner elements may be moved by the first drive.

Drawings

Other advantages of the present invention are described in the following examples. In the drawings:

FIG. 1 shows a schematic diagram of an operating point according to the present invention;

fig. 2 shows a schematic front view of a first embodiment of a thread tensioner according to the invention; and

fig. 3 shows a schematic top view of the precleaner of a second embodiment of the thread tensioner according to the invention.

In the following description of the figures, the same reference numerals are used for the same and/or at least comparable features in the different figures, respectively. The individual features, their design and/or mode of action are usually only explained in detail at the time of first mentioned. If individual features are not explained in detail, their design and/or mode of action correspond to the design and mode of action of features that have been described as having the same function or having the same name.

Detailed Description

Fig. 1 shows a working point 1 of a textile machine (not shown), in particular a winding machine, according to the invention. The working point 1 is used to rewind the yarn 2 from the first sleeve 3 onto the second sleeve 4. The first sleeve 3 is designed as a spinning sleeve. The second sleeve 4 is designed as a winding sleeve. The first sleeve 3 is wound up, for example, by a spinning machine through the yarn 2 spun by the spinning machine. Since the spinning sleeves can only accommodate a comparatively small amount of yarn 2, the yarn 2 is wound from a plurality of spinning sleeves onto the winding sleeve. The working point 1 has, for example, a splicer 5 for combining yarns 2 from a plurality of spinning sleeves.

The work point 1 also has, for example, a ball-type delimiters 6 and a first pivotable suction pipe 7 and a second pivotable suction pipe 8. The

pivotable suction pipes

7, 8 are used to position and grip the ends of the yarn on the first sleeve 3 and the second sleeve 4. The working point 1 furthermore has a grooved roll 9, which serves, on the one hand, for driving the second sleeve 4, for example, and, on the other hand, for winding the thread 2 into a cross-wound loop.

In order to maintain a uniform thread tension, the working point 1 has a thread tensioner 10 according to the invention. The thread tensioner 10 is shown enlarged in fig. 2 in the same view as in fig. 1. The thread tensioner 10 comprises a tensioning device 11. In particular, it has a first tensioner element 12 and a second tensioner element 13. The

tensioner elements

12, 13 in particular have a plurality of tensioner segments 14 which are preferably arranged alternately with one another and together define a yarn path 15 for the yarn 2. The tensioner sections 14 of the

tensioner elements

12, 13 engage with each other, for example like a comb. The pressure exerted on both sides of the thread 2 or the friction of the thread 2 on the tensioner section 14 determines the thread tension.

The thread tensioner 10 has a first drive 16 which is designed to move the first tensioner element 12 and the second tensioner element 13 relative to one another. In this embodiment, the first drive 16 is connected only to the second tensioner element 13. The driver 16 can therefore only actuate the second tensioner element 13. The position of the

tensioner elements

12, 13 relative to each other is determined solely by the second tensioner element 13. The first drive 16 is designed as an electric motor, for example. The first tensioner element 12 is fixedly connected to the support 17 of the thread tensioner 10. In this embodiment, the first tensioner element 12 is connected to the support 17 via two retaining elements 18.

The thread tensioner 10 also comprises a pre-cleaner 19 arranged in front of the tensioning device 11 in the running direction of the thread 2. The precleaner 19 has a passage opening 20 for the yarn 2. The shape and/or size of the passage opening 20 of the precleaner 19 can be changed by means of the second driver 21. In this particular example, the precleaner 19 has a first restraining element 22 and a second restraining element 23. The first restriction element 22 and the second restriction element 23 are movable relative to each other by means of the second driver 21.

The first restraint element 22 is fixedly connected to the support 17. In particular, the first constraint element 22 is connected to the support 17 via a fixing element 24. The second restriction element 23 is connected to a second drive 21 by means of which it can be moved relative to the carrier 17. By means of which the passage opening 20 can be changed. The first driver 16 and the second driver 21 are fastened to the support 17. The first driver 16 causes a linear movement of the second tensioner element 13 and the second driver 21 causes a linear movement of the second constraint element 23. In particular, the two

drives

16, 21 are designed to be of the same type.

The structure of the precleaner 19 is shown in more detail in FIG. 3 in another embodiment. Fig. 3 shows a top view of the precleaner 19, with the remaining parts of the thread tensioner 10 concealed. The combined effect of the first 22 and second 23 restriction elements can be clearly seen, in particular showing how the relative movement of the two

restriction elements

22, 23 affects the size of the passage opening 20. As already described, the first constraint element 22 is fixedly connected to the support 17. In this example, the relative movement between the constraining

elements

22, 23 is caused only by the movement of the second constraining element 23. The second constraint element 23 is connected to a second driver 21, which is also fastened to the support 17.

In this example, the passage opening 20 is formed by a recess in the second restriction element 23. The size of the passage opening 20 is determined on the one hand by the recess and on the other hand by the edge of the first restriction element 22 and correspondingly by the relative movement of the two

restriction elements

22, 23.

The invention is not limited to the embodiments shown and described. Even though it may be shown and described in different embodiments, modifications which are within the scope of the patent claims are equally possible as a combination of features.

List of reference numerals

1. Working point

2. Yarn

3. First sleeve

4. Second sleeve

5. Splicing device

6. Ball type definiting device

7. First pivotable straw

8. Second pivotable straw

9. Grooved roll

10. Yarn strainer

11. Tension device

12. First tensioner element

13. Second tensioner element

14. Tensioner segment

15. Yarn path

16. First driver

17. Supporting member

18. Holding element

19. Pre-cleaner

20. Passage opening

21. Second driver

22. First constraint element

23. Second restraining element

24. Fixing element

Claims

1. A thread tensioner (10) for a working point (1) of a textile machine, preferably a winding machine, for rewinding a thread (2) from a first sleeve (3), in particular a spinning sleeve, onto a second sleeve (4), in particular a winding sleeve,

-wherein the yarn tensioner (10) has a tensioning device (11) for adjusting the yarn tension of the moving yarn (2);

-wherein the thread tensioner (10) comprises a first drive (16) by means of which the thread tension generated by the tensioning device (11) is adjusted;

-wherein the yarn tensioner (10) comprises a pre-cleaner (19) for eliminating, restraining or un-restraining a determined yarn defect; and is

-wherein the pre-cleaner (19) has a passage opening (20) for the yarn (2);

it is characterized in that the preparation method is characterized in that,

the thread tensioner (10) comprises a second drive (21), by means of which the shape and/or size of the passage opening (20) can be changed if necessary.

2. Yarn tensioner (10) according to the preceding claim, characterized in that the tensioning device (11) comprises a first tensioner element (12) and a second tensioner element (13), wherein the first tensioner element (12) and the second tensioner element (13) are moved relative to each other by means of the first drive (16) in order to thereby adjust the yarn tension of the yarn (2) moving between the first tensioner element (12) and the second tensioner element (13).

3. Yarn tensioner (10) according to one of the preceding claims, characterized in that the first tensioner element (12) and the second tensioner element (13) each have a plurality of tensioner segments (14), which are preferably arranged alternately with one another and together define a yarn path (15) for the yarn (2).

4. Yarn tensioner (10) according to one of the preceding claims, characterized in that the precleaner (19) has a first restraining element (22) and a second restraining element (23), wherein the first restraining element (22) and the second restraining element (23) are moved relative to each other by means of a second drive (21).

5. The thread tensioner (10) as claimed in one of the preceding claims, characterized in that the first drive (16) and/or the second drive (21) are designed as an electric motor, preferably as a stepping motor, an electromagnetic drive or a pneumatic drive.

6. Yarn tensioner (10) according to one of the preceding claims, characterized in that the first drive (16) and the second drive (21) are designed to be of the same type.

7. Thread tensioner (10) according to one of the preceding claims, characterized in that the first drive (16) and the second drive (21) are jointly fastened on a support (17) of the thread tensioner (10).

8. Yarn tensioner (10) according to one of the preceding claims, characterized in that the first tensioner element (12) is connected to the support (17) directly or by means of at least one retaining element (18) and the second tensioner element (13) is connected to the first drive (16) and is moved relative to the support (17) by means of the first drive.

9. Yarn tensioner (10) according to one of the preceding claims, characterized in that the first restraint element (22) is connected to the support (17) directly or by means of at least one fixing element (24) and the second restraint element (23) is connected to the second drive (21) and is moved relative to the support (17) by means of the second drive.

10. Working point (1) of a textile machine, preferably a winding machine, for rewinding a yarn (2) from a first sleeve (3), in particular a spinning sleeve, onto a second sleeve (4), in particular a winding sleeve,

characterized in that the working point (1) has a thread tensioner (10) according to one or more of the preceding claims.

11. Method for influencing a moving yarn (2) at a working point (1) of a textile machine, preferably a winding machine, comprising:

the yarn (2) is rewound from a first sleeve (3), in particular a spinning sleeve, onto a second sleeve (4), in particular a winding sleeve;

-wherein the yarn (2) passes through a pre-cleaner (19) having a passage opening (20) for the yarn (2), by means of which a determined yarn defect is eliminated, bound or unraveled; and

-wherein the yarn (2) after passing through the pre-clearer (19) is passed through a tensioning device (11) with a first drive (16) by means of which the yarn tension (2) of the yarn is adjusted;

it is characterized in that the preparation method is characterized in that,

the shape and/or size of the passage opening (20) is changed by means of a second drive (21) if necessary.

12. Method according to the preceding claim, characterized in that the adjustment of the yarn tension and the change of the shape and/or size of the passage opening (20) are carried out independently of each other.

13. Method according to claim 11 or 12, characterized in that the change of the shape and/or size of the passage opening (20) is carried out in such a way that a first restraining element (22) of the precleaner (19) is moved relative to a second restraining element (23) of the precleaner (19) by means of the second drive (21).

14. Method according to one of claims 11 to 13, characterized in that the thread tension is adjusted in such a way that a first tensioner element (12) of the tensioning device (11) and a second tensioner element (13) of the tensioning device (11) are moved relative to one another by means of the first drive (16), wherein the thread (2) is moved between the first tensioner element (12) and the second tensioner element (13).