Winding machine

Abstract

The present invention relates to a winding machine having a plurality of winding units (1.1 to 1.5) for winding a plurality of yarns (2) to form a package (21), the winding units (1.1 to 1.5) being held side by side on the circumferential surface of driven winding spindles (19.1, 19.2), a contact roller (26) pressed against the circumferential surface of the package (21), and a plurality of traverse units (4.1 to 4.5) for guiding the yarn back and forth, distributed among the winding units (1.1 to 1.5), each of the traverse units (4.1 to 4.5) having at least one yarn guide (7.1 to 7.3, 8.1, 8.2) guided in a guide rail (5.1 to 5.3, 6.1, 6.2), and the guide rails (5.1 to 5.3, 6.1, 6.2) of adjacent traverse units (4.1 to 4.5) being arranged so as to overlap. In order to maintain identical guidance of the yarn in the winding units (1.1 to 1.5), the yarn guides (7.1 to 7.3, 8.1, 8.2) of adjacent traverse units (4.1 to 4.5) are formed with guide elements (9) in contact with the yarn, which can be guided in one common guide plane (27).

Description

[Technical field]

[0001] The present invention relates to a winding machine of the type according to the preamble of claim 1, comprising a number of winding units for winding a number of yarns to form a package.

[0002] During melt spinning of synthetic yarns, it is generally known that the yarns are wound up individually at the end of the process to form a package. In order to wind up the yarns formed in the spinning station in parallel to form a package, such a winding machine with a number of winding units is used. The packages are held side by side on the circumference of a driven winding spindle. The winding units thus extend along the winding spindle and each winding unit has a traverse unit for guiding one of the yarns back and forth in one traverse stroke. Basically two variations of winding machines are known in the prior art.

[0003] For example, in a first variant disclosed in EP 2 208 699 A1, the yarn is guided by a respective yarn guide driven in a reciprocating manner in the traverse unit of the winding unit. The yarn guide is driven by an endless belt and guided along the traverse path by a guide rail. However, such a belt drive has a width that is greater than the package width of the package to be wound. To this extent, the traverse units in the known winding machine are arranged one next to the other in an overlapping manner. However, such an overlapping of the traverse units leads to an uneven guidance of the yarn in the winding units for laying it down on the package surface. In particular, the guide lengths formed between the package surface and the yarn guide are different from one another, which has a clearly unfavorable effect on the mass distribution of the yarn, in particular at the end of the traverse path.

[0004] A second variant of the winding machine mentioned at the outset is known, for example, from EP 0 965 554 A1. In this configuration of the winding machine, the traverse unit has a number of guide elements driven in opposite directions for guiding each of the yarns of the yarns in the winding unit. These guide elements are configured as rotating vanes, which guide the yarn with their vane tips. In this case, however, the yarn must be transferred between the vane pair at the end of the traverse stroke. In this respect, the yarn is not guided in a defined manner that influences the mass distribution of the yarn at the winding edge, especially at the end of the traverse stroke.

[0005] The object of the present invention is therefore to improve a winding machine of the type mentioned at the beginning, so that in each winding unit the yarn can be wound to form identical packages with a uniform mass distribution of the deposited yarn.

[0006] This problem is solved according to the invention in that the yarn guides of adjacent traverse units are designed with guide elements which come into contact with the yarn in such a way that they can be guided in a common guide plane.

[0007] Advantageous refinements of the invention are defined by the features and feature combinations recited in the dependent claims.

[0008] The invention departs from the requirement that the same thread guide must be used for traversing the thread in each traverse unit, in order to ensure identical mass inertia, especially when driven back and forth. The invention therefore recognises that different inertia masses in the driven back and forth thread guides can be compensated for in a simple manner by the respective drives. The thread guides of adjacent traverse units can therefore be designed independently of a drive connection with the guide elements, which moves the guide elements to guide the thread in a common guide plane. The thread is therefore traversed under identical conditions in one traverse stroke in adjacent winding units. The traverse triangle stretched between the guide elements and the preceding head thread guide is formed with the same dimensions in the winding units.

[0009] However, the so-called drag length formed between the guide element of the yarn guide and the contact roller is also important for the placement of the yarn on the package surface. Therefore, a refinement of the invention in which a constant distance is formed between the guide plane of the guide element and the contact roller in a number of winding units is particularly advantageous for uniform winding of the package ends of the packages and uniform weight distribution of the yarn in each package.

[0010] Since the yarn bundle formed at the winding station of the melt spinning device is wound up to form a package under identical conditions, it is further provided that all guide elements of the yarn guide of the traverse unit can be guided in one guide plane, which in particular makes it possible to arrange the traverse units next to each other in a particularly compact manner in the machine frame.

[0011] In order to be able to compensate for the difference in height of the guide elements relative to the guide plane in the case of a superimposed arrangement of traverse units, different refinement variants are possible. In a first variant, the thread guide guided in the upper guide rail has a holder that projects towards the lower guide rail, at the end of which a guide element of the thread guide is arranged. In this case, the thread guide guided in the lower guide rail is guided in the lower guide rail by the guide element, which determines the position of the guide plane.

[0012] Alternatively, however, it is also possible that the thread guide guided in the lower guide rail has a holder protruding in the direction of the upper guide rail, at the end of which the guide element of the thread guide is held. The thread guide guided in the upper guide rail is thus guided in the upper guide rail by the guide element. The position of the upper guide rail forms the guide plane of the guide elements of all winding units.

[0013] For the case where a relatively large height distance is required for the arrangement of overlapping traverse units, a refinement of the invention is preferably constructed in which the thread guide guided in the upper guide rail has a holder protruding in the direction of the lower guide rail, at the end of which a guide element of the thread guide is held, and the thread guide guided in the lower guide rail has a holder protruding in the direction of the upper guide rail, at the end of which a guide element of the thread guide is held, in which case the guide plane extends between the upper and lower guide rails.

[0014] The drive of the yarn guide is preferably effected by an endless belt driven back and forth in the traverse unit, this type of drive being distinguished by high positional accuracy and controllability of the yarn guide during one traverse stroke.

[0015] The endless belt is preferably guided by a number of deflection rollers and a drive wheel which is directly driven by an electric motor, so that, for example, the length of the traverse stroke can be controlled by a predefined step sequence of a stepping motor.

[0016] In order to influence the mass distribution of the yarn when winding the package, so that a package density as uniform as possible over the entire width of the package can be obtained, a particularly advantageous refinement of the invention is provided in which the electric motor is assigned a control unit for drive control, the control unit having a number of control programs for guiding the yarn guide for traversing the yarn. Any traverse stroke shortening can thus be carried out independently of the respective winding mode. In this case, the possibility arises of adapting the traverse speed in relation to the length of the traverse stroke so that the same time for the execution of one traverse stroke results. As a result, a constant traverse frequency can be maintained, which can be used in particular for winding the package in step precision winding. Step precision winding is a variation of random winding and precision winding. In this case, each winding mode can be advantageously carried out.

[0017] In order to achieve a rapid reversal of the yarn guide at the end of the traverse stroke, especially when the inertial mass of the yarn guide is increased, a refinement of the invention is particularly advantageous in which the traverse unit has separate reversal assistants at each end of the guide rail at the winding unit, which act on the yarn guide for the reversal movement. Such reversal assistants can be formed, for example, by mechanical or magnetic spring elements. Such spring elements can be continuously engaged to assist the movement of the yarn guide.

[0018] The winding machine according to the invention will now be described in more detail with reference to several exemplary embodiments and with reference to the accompanying drawings, in which: FIG. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram showing a first embodiment of a winding machine according to the present invention. [Diagram 2] 2 is a plan view showing a schematic top view of a traverse unit in the winding unit of the embodiment shown in FIG. 1. FIG. [Diagram 3] FIG. 2 is a schematic partial view of adjacent winding units of the embodiment shown in FIG. 1; [Figure 4] FIG. 4 is a schematic partial view of two adjacent winding units of another embodiment of a winding machine according to the present invention; [Diagram 5] FIG. 4 is a schematic partial view of adjacent winding units of another embodiment of a winding machine according to the present invention;

[0020] A first embodiment of a winding machine according to the present invention is shown from multiple viewpoints in Figures 1, 2 and 3. Figure 1 shows an overall view, Figure 2 shows a plan view of a traverse unit as seen from above, and Figure 3 shows a partial view of an adjacent winding unit. The embodiment of the winding machine according to the present invention will first be described with reference to Figure 1.

[0021] The winding machine has a total of five winding units 1.1-1.5 in this embodiment, which are arranged along one protruding winding spindle 19.1. The number of winding units is exemplary. Thus, as a rule, 10, 12 or more threads are wound in parallel side by side on one driven winding spindle to form a package.

[0022] The winding spindle 19.1 is held in this exemplary embodiment on a rotatably mounted winding revolver 20, which supports a second winding spindle 19.2 offset by 180°. Two spindle drives 23.1, 23.2 are assigned to the winding spindles 19.1, 19.2, respectively. The rotational movement of the winding revolver 20, which is rotatably mounted on the machine frame 18, is performed by a revolver drive 24, which causes the winding revolver 20 with the winding spindles 19.1, 19.2 to move. The winding spindles 19.1, 19.2 are thus alternately pivoted into a change area and into a running area. In the running area of ​​the winding spindles 19.1, 19.2, one thread is wound in each of the winding units 1.1-1.5 to form one package 21. To accommodate the package 21, a number of winding tubes 22 are clamped one behind the other on the circumference of the winding spindles 19.1, 19.2.

[0023] The winding units 1.1-1.5 formed in the winding machine each have a deflection roller 3.1-3.5 in the entry area for separating and guiding the yarns. These deflection rollers 3.1-3.5 form so-called head yarn guides in the respective winding units 1.1-1.5 and cooperate with traverse units 4.1-4.5. The deflection rollers 3.1-3.5 and the correspondingly arranged traverse units 4.1-4.5 form a so-called traverse triangle, in which the yarn 2 is guided back and forth, so that a traverse winding occurs on the circumferential surface of the package 21.

[0024] The supply of the yarn 2 is effected in this example by means of two godets 25.1, 25.2, which are held at the end faces of the winding machine on a godet support 28. The godets 25.1, 25.2 are designed to be driven so that, for example, the yarn bundle can be drawn directly from the spinning device.

[0025] It should be emphasized here that the configuration of the head yarn guide and the feeding of the yarn via the laterally arranged godets are exemplary: in principle, there is also the possibility of feeding several yarns in a centrally spreading manner via godets held in the central area of ​​the winding unit.

[0026] The traverse units 4.1 to 4.5 arranged in the winding units 1.1 to 1.5 each have a width greater than the width of the package 21. The traverse units 4.1 to 4.5 are therefore arranged on the machine frame 18 in a mutually offset and overlapping relationship. The traverse units 4.1, 4.3, 4.5 are arranged in an upper position on the machine frame 18, and the traverse units 4.2 and 4.4 are arranged in a lower position. Each of the traverse units 4.1 to 4.5 has a guide rail and a yarn guide guided in the guide rail. The traverse units 4.1, 4.3, 4.5 therefore have upper guide rails 5.1 to 5.3 and upper yarn guides 7.1 to 7.3. The traverse units 4.2 and 4.4 held in the lower position have respective lower guide rails 6.1 and 6.2 and respective lower yarn guides 8.1 and 8.2.

[0027] The yarn guides 7.1 to 7.3 and 8.1 and 8.2 guided in the guide rails 5.1 to 5.3 and 6.1 and 6.2 are attached to an endless belt 13, respectively.

[0028] To explain the drive of the yarn guides, reference is additionally made to the plan view of the traverse units 4.1 to 4.5 shown in FIG. 2. Each traverse unit 4.1 to 4.5 has an identical drive for driving the yarn guides, which will be explained in detail in that respect on the example of the traverse unit 4.1.

[0029] The traverse unit 4.1 has an endless belt 13. The endless belt 13 is guided by two guide rollers 14 arranged at a distance from one another and a drive wheel 15. The drive wheel 15 is connected to an electric motor 11 as shown in FIG. 1. The guide rollers 14 are arranged in the end regions of the guide rail 5.1, so that the endless belt 13 is guided parallel to the guide rail 5.1. In the region between the guide rollers 14, a yarn guide 7.1 is fixedly connected to the endless belt 13. The yarn guide 7.1 is guided back and forth in the guide rail 5.1 by the endless belt 13.

[0030] It should be noted here that the endless belt may extend over several winding units and support a separate thread guide for each winding unit between the guide rollers, whereby the several thread guides are guided synchronously by the traverse unit.

[0031] In the reversing region of the yarn guide 7.1, a separate reversing aid 16 is arranged, which can assist the reversing movement of the yarn guide 7.1 by means of a mechanical or elastic spring. The reversing aid 16 is arranged correspondingly to or adjacent to the guide roller 14.

[0032] 1, the guide rollers 14 of adjacent traverse units 4.1, 4.2 are arranged one above the other and may be mounted, for example, for free rotation on one axis. Guide rollers are thus arranged between traverse unit 4.2 and traverse unit 4.3, between traverse unit 4.3 and traverse unit 4.4 and between traverse unit 4.4 and traverse unit 4.5.

[0033] Each electric motor 11 arranged to drive a drive wheel 15 has one control unit 12. A plurality of control programs for controlling the traverse units 4.1 to 4.5 are stored in the control unit 12. The control unit 12 is connected to a machine control device 17 as shown in FIG.

[0034] For the explanation of the traverse units 4.1 to 4.5, reference is additionally made below to Fig. 3, in which adjacent traverse units 4.1, 4.2 are shown in an enlarged view of Fig. 1.

[0035] The traverse unit 4.1 guides an upper thread guide 7.1 in an upper guide rail 5.1. The upper thread guide 7.1 has a holder 10 which projects in the direction of the lower guide rail 6.1. At the end of the holder 10 a guide element 9 is arranged. The guide element 9 has a guide groove 9.1 by means of which the thread 2 is guided.

[0036] The lower guide rail 6.1 of the adjacent traverse unit 4.2 has a guide element 9 with a guide groove 9.1 in the lower thread guide 8.1. The guide element 9 of the lower thread guide 8.1 is guided directly in the guide rail 6.1. The guide elements 9 of the upper thread guide 7.1 and the guide elements 9 of the lower thread guide 8.1 of the adjacent traverse units 4.1, 4.2 are guided in a common guide plane 27. On the one hand, the traverse triangle formed between the provided deflection rollers 3.1, 3.2 and the guide elements 9 has the same shape in both winding units 1.1, 1.2. The thread is therefore traversed under the same conditions in the winding units 1.1 and 1.2 to wind the package.

[0037] As is clear from the drawing in FIG. 1, the traverse units 4.1 to 4.5 arranged in the winding units 1.1 to 1.5 are configured in such a way that all guide elements 9 of the upper thread guides 7.1 to 7.3 and the lower thread guides 8.1, 8.2 are guided in one common guide plane 27.

[0038] The traverse units 4.1-4.5 are followed by a contact roller 26 in the winding units 1.1-1.5. The contact roller 26 rests in contact with the surface of the package 21 to be wound so that the yarn 2 can be guided onto the package surface of the package 21. The contact roller 26 extends across all the packages 21 of the winding units 1.1-1.5 and is rotatably supported in the machine frame 18. In this case, the contact roller 26 is preferably held on a movable roller support 28.

[0039] As is clear from the diagram in FIG. 1, a distance A is formed between the guide plane 27, through which the guide elements 9 of the upper yarn guides 7.1-7.3 and the lower yarn guides 8.1, 8.2 move, and the contact roller 26. The distance between the guide plane 27 and the contact roller 26 is indicated with the reference A in FIG. 1. This distance A forms a so-called trailing length, which occurs between the guide elements 9 and the contact roller 26 when guiding the yarn in the winding unit. In this case, the trailing length is the same for all winding units 1.1-1.5, which is particularly advantageous when performing so-called breathing in order to optimize the yarn mass distribution at the package end of the package 21.

[0040] During operation, each of the numerous traverse units 4.1-4.5 is driven and controlled by a respective separate control unit 12 and electric motor 11. By connection of the control unit 12 to the machine control device 17, a synchronization of all control and winding programs in the winding units 1.1-1.5 is possible. Taking into account, in particular, the different inertial masses of the upper thread guides 7.1-7.3 compared to the lower thread guides 8.1, 8.2, the individual electric motors 11 can be controlled differently and individually from one another. Identical guidance of the yarn in the winding units 1.1-1.5 ensures that winding is carried out with very good quality in all winding units.

[0041] Depending on the type of construction and the space requirements in the machine frame, the traverse units 4.1 to 4.5 can be arranged in the machine frame in different configurations. In this respect, in Fig. 4 another possible embodiment of the winding machine according to the invention is illustrated in the example of two adjacent winding units 1.1 and 1.2.

[0042] The traverse units 4.1, 4.2 of the winding units 1.1, 1.2 are shown. The traverse unit 4.1 has an upper guide rail 5.1 with an upper thread guide 7.1. The adjacent traverse unit 4.2 has a lower guide rail 6.1 and a lower thread guide 8.1. The lower thread guide 8.1 has a holder 10, which in the present example is directed upwards towards the upper guide rail 5.1, at the end of which a guide element 9 is arranged. The guide element 9 of the lower thread guide 8.1 extends substantially into the guide plane 27 defined by the upper guide rail 5.1. The upper thread guide 7.1 therefore has a guide element 9 guided in the upper guide rail 5.1. This therefore makes it possible to achieve a larger drag length in the winding machine.

[0043] If a larger distance is required between the traverse unit held in the upper position and the traverse unit held in the lower position, a guide plane can also be formed between the upper and lower guide rails. In this respect, one possible embodiment is shown diagrammatically in FIG. 5 by a partial view of adjacent winding units 1.1, 1.2.

[0044] In the embodiment shown in Fig. 5, the traverse unit 4.1 has an upper guide rail 5.1 with an upper thread guide 7.1, and the traverse unit 4.2 has a lower guide rail 6.1 with a lower thread guide 8.1. Each thread guide 7.1, 8.1 is provided with a holder 10, which protrudes into the intermediate space between the upper guide rail 5.1 and the lower guide rail 6.1. At the end of the holder 10, a guide element 9 is arranged, which thus moves in a guide plane 27.

[0045] The embodiment shown in Figures 1 to 5 is exemplary in particular with regard to the structural shape of the traverse units 4.1 to 4.5 and the yarn guides of the traverse units 4.1 to 4.5. It is important that the guide elements 9 guided by the traverse units 4.1, 4.5 and contacting the yarn are guided in one common guide plane 27. This guide plane 27 is aligned so that it is essentially parallel to the winding spindle 19.1 on which the package 21 is held. Several guide elements 9 per traverse unit may also be guided in one endless belt 13.

Claims

1. A winding machine comprising a plurality of winding units (1.1-1.5) for winding a plurality of yarns (2) to form a package (21), the winding units (1.1-1.5) being held side by side around a driven winding spindle (19.1, 19.2), a contact roller (26) pressed against the circumferential surface of the package (21) and a winding roller (27) arranged in a distributed manner among the winding units (1.1-1.5) for winding the yarns to form a package (21), a plurality of traverse units (4.1 to 4.5) for winding a yarn in a yarn direction, each of the traverse units (4.1 to 4.5) having at least one yarn guide (7.1 to 7.3, 8.1, 8.2) guided in a guide rail (5.1 to 5.3, 6.1, 6.2), the guide rails (5.1 to 5.3, 6.1, 6.2) of adjacent traverse units (4.1 to 4.5) being arranged overlapping each other, 1. A winding machine, characterized in that the yarn guides (7.1-7.3, 8.1, 8.2) of adjacent traverse units (4.1-4.5) are configured with guide elements (9) in contact with the yarn, which are guideable in a common guide plane (27).

2. 2. The winding machine according to claim 1, wherein in the winding units (1.1-1.5), a constant distance is formed between the guide plane (27) of the guide element (9) and the contact roller (26).

3. 2. The winding machine according to claim 1, wherein all guide elements (9) of the yarn guides (7.1-7.3, 8.1, 8.2) of the traverse units (4.1-4.5) are guideable in the guide plane (27).

4. 4. Winding machine according to claim 1, characterized in that the thread guides (7.1-7.3) guided in an upper guide rail (5.1-5.3) have holders (10) protruding in the direction of a lower guide rail (6.1, 6.2), at the ends of which the guide elements (9) of the thread guides (7.1-7.3) are held, and the thread guides (8.1, 8.2) guided in the lower guide rail (6.1, 6.2) are guided in the lower guide rail (6.1, 6.2) by the guide elements (9).

5. 5. Winding machine according to claim 4, characterized in that the thread guides (8.1, 8.2) guided in the lower guide rail (6.1, 6.2) have holders (10) protruding in the direction of the upper guide rail (5.1-5.3), at the ends of which the guide elements (9) of the thread guides (8.1, 8.2) are held, and the thread guides (7.1-7.3) guided in the upper guide rail (5.1-5.3) are guided in the upper guide rail (5.1-5.3) by the guide elements (9).

6. 5. Winding machine according to claim 4, characterized in that the thread guides (7.1-7.3) guided in the upper guide rail (5.1-5.3) have holders (10) projecting in the direction of the lower guide rail (6.1, 6.2), at the ends of which the guide elements (9) of the thread guides (7.1-7.3) are held, and the thread guides (8.1, 8.2) guided in the lower guide rail (6.1, 6.2) have holders (10) projecting in the direction of the upper guide rail (5.1-5.3), at the ends of which the guide elements (9) of the thread guides (8.1, 8.2) are held.

7. 4. The winding machine according to claim 1, wherein the traverse units (4.1 to 4.5) each have an endless belt (13) driven in a reciprocating manner, and the yarn guides (7.1 to 7.3, 8.1, 8.2) are attached to the endless belt (13).

8. 8. The winding machine according to claim 7, wherein the endless belt (13) is guided by a plurality of guide rollers (14) and a drive wheel (15) for each winding unit (1.1 to 1.5), and an electric motor (11) is connected to the drive wheel (15).

9. 9. The winding machine according to claim 8, wherein a control unit (12) for driving control is arranged corresponding to the electric motor (11), the control unit (12) having a plurality of control programs for guiding the yarn guide to traverse the yarn.

10. 4. The winding machine according to claim 1, wherein in the winding unit (1.1-1.5), the traverse units (4.1-4.5) have respective reversing aids (16) at each end of the guide rails (5.1-5.3, 6.1, 6.2), which act on the yarn guides (7.1-7.3, 8.1, 8.2) to reverse their movement.

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