CN112638802A

CN112638802A - Method and device for removing at least one bobbin

Info

Publication number: CN112638802A
Application number: CN201980058524.7A
Authority: CN
Inventors: R·沃斯; D·岑岑; A·索尔; J·科瓦尔斯基
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2018-09-15
Filing date: 2019-09-05
Publication date: 2021-04-09
Also published as: JP7397068B2; DE102018007334A1; JP2022500331A; WO2020053064A1; DE112019004587A5

Abstract

The invention relates to a method and a device for pushing off at least one bobbin, which is held on a projecting winding spindle (3.1,3.2) of a winding machine. The pushing device comprises a pushing mechanism (13) and a pushing actuator (14) for pushing the pushing mechanism (13) along the winding spindles (3.1, 3.2). In order to be able to remove possible yarn residues on the circumferential surface of the winding spindles (3.1,3.2), a movable cleaning mechanism (15) is provided, by means of which the yarn residues are cleaned off the circumferential surface of the winding spindles (3.1,3.2) during or after the pushing off of the yarn drum (7).

Description

Method and device for removing at least one bobbin

The invention relates to a method for pushing off at least one package according to the preamble of claim 1 and to a device for pushing off at least one package according to the preamble of claim 6.

In the production of synthetic threads, it is known to wind the threads separately after melt spinning to form bobbins. In order to achieve a continuous material flow, a winding machine with two winding spindles which are held projecting is preferably used for winding, which winding spindles are arranged on a movable carrier and are guided in an alternating manner to a winding region and a changing region. The melt spun filaments can thus be continuously wound to form bobbins without interrupting the process. A winding bobbin for receiving the thread is pushed onto the circumference of the winding spindle and clamped thereon at each winding position, the thread being wound to form a package on the circumference of the winding bobbin. The winding spindle held in the replacement region interacts with the ejection device in order to be able to eject the wound bobbin on the circumferential surface.

WO98/28218a1 discloses a method of this type and a device of this type for pushing off at least one bobbin. In the known method and the known device for pushing off at least one bobbin, the push mechanism is guided along the winding spindle by the push actuator. The pusher mechanism is here engaged on the end of the winding tube or directly on one end of the bobbin. In this case, a plurality of bobbins can be simultaneously pushed off the winding spindle. The push mechanism can be guided by the push actuator up to the free end of the winding spindle.

However, when the package is moved, a loose end supported on the peripheral surface of the package is released and falls off the package. The thread ends falling off in this way can catch on the circumference of the winding spindle and lead to undesired thread residues. Depending on the design of the displacement mechanism, which can be realized in the form of a displacement ring or a displacement fork, in the case of repeated pushing-off movements, bead-like yarn residues or yarn balls can form, which can lead to jamming, even at the bearing end of the winding spindle.

The object of the invention is therefore to improve a method of this type for pushing off at least one bobbin and a device of this type for pushing off at least one bobbin in order to avoid yarn residues adhering to the circumference of the winding spindle.

According to the invention, the object is achieved in that, during or after the movement of the yarn package, yarn residues are removed from the circumference of the winding spindle.

With the device according to the invention, the solution is achieved in that a movable cleaning device is provided, by means of which yarn residues can be cleaned off the circumference of the winding spindle during or after the pushing off of the yarn package.

Advantageous developments of the invention are defined by the features and combinations of features of the respective dependent claims.

The invention has the particular advantage that, after the bobbin or bobbins have been pushed off the winding spindle, the winding spindle is cleaned of any adhering yarn residues directly. Thus, after pushing off each bobbin, the loose ends can be cleaned directly of potential deposits. In particular with regard to automation, a high level of operational reliability is thus achieved for the re-picking up of the winding tubes and the rewinding of the bobbins on the winding spindles.

However, a method variant has proven particularly successful in which the circumferential surface of the winding spindle is cleaned by contacting the stripping device, which is moved along the winding spindle. The yarn residues can thus be received and removed directly by mechanical contact between the stripping device and the peripheral surface of the winding spindle.

For this purpose, the stripping device preferably has a stripping member, by means of which the stripping member can be held in contact with the circumferential surface of the winding spindle. The entire circumference of the winding spindle can thus be cleaned in a powerful manner by a translational movement of the cleaning mechanism.

The receiving and removal of the yarn residues on the circumference of the winding spindle is preferably achieved by brushing the circumference of the winding spindle.

In this connection, the stripping member is preferably formed by an annular brush, which can be guided along the winding spindle.

In the case of holding the winding spindles in a manner that is as shielded as possible, a method variant can preferably be carried out in which the circumferential surface of the winding spindle is impinged by an air flow of a nozzle device, wherein the nozzle device is moved along the winding spindle.

To this end, in a first variant of embodiment, the cleaning mechanism of the push-off device is realized by an annular nozzle device by means of which an air flow can be generated on the circumferential surface of the winding spindle. The yarn residues on the circumference of the winding spindle can thus be blown away.

According to an advantageous development of the push-off device, the guide of the cleaning means can be combined with the displacement means in such a way that the cleaning means and the displacement means can be guided by the displacement actuator.

Alternatively, however, a separate actuator can also be assigned to the cleaning mechanism, which actuator can be moved along the winding spindle independently of the pusher mechanism.

In order to be able to receive the yarn residues that have already been caught on the winding spindles after cleaning, it is also provided that the yarn residues that have fallen off at the free ends of the winding spindles are collected and suctioned. For this purpose, the suction device is assigned to the cleaning device at the free end of the winding spindle.

The winding machine with the push-off device according to the invention has the particular advantage that doffing of the bobbins and loading of the empty bobbins can be carried out in a fully automatic manner without any further inspection by the operator. In this regard, the winder of the present invention is suitable for full automation of the melt spinning process.

The invention will be explained in more detail below with reference to several embodiments of the push-off device according to the invention, in which:

fig. 1 schematically shows a side view of a winding machine according to the invention with a first embodiment of a push-off device according to the invention.

Figure 2 schematically shows a cross-sectional view of an embodiment of the push-off device according to the invention in figure 1,

fig. 3 schematically shows a cross-sectional view of another embodiment of a push-off device according to the invention, an

Figure 4 schematically shows a cross-sectional view of another embodiment of a push-off device according to the invention.

Fig. 1 is a side view of a winding machine according to the invention with a first exemplary embodiment of a push-off device according to the invention. The winder is exemplary in its structure and is used in a melt spinning process for continuously winding a synthetic thread without interruption. A winding machine of this type is preferably embodied such that it has a plurality of winding positions for winding a plurality of threads parallel to one another to form a package. In the embodiment of the winding machine shown here, only one winding position is arranged in the machine frame 1. However, according to the invention, it is irrelevant whether one bobbin or a plurality of bobbins are wound simultaneously. The invention extends to both versions. Regardless of the number of winding positions, protruding winding spindles 3.1 driven by spindle drives 5.1 are provided for this purpose.

In the winding machine, the winding spindle 3.1 is held projecting on the winding turret 2. The winding turret 2 is rotatably mounted in the frame 1 and is coupled to a rotary drive mechanism 4. The winding turret 2 may be rotated by a rotary drive mechanism 4.

The winding turret 2 supports a second winding spindle 3.2, which is offset by 180 ° with respect to the winding spindle 3.1 and likewise projects, is held and is coupled at its longitudinal end to a second spindle drive 5.2. By rotating the winding turret 2, the winding spindles 3.1,3.2 can be guided alternately to the winding area and to the change area. In fig. 1, the winding spindles 3.1 are located in the winding area, while the winding spindles 3.2 are located in the replacement area.

To wind the thread 12 to form the yarn package 7, a winding bobbin 6 is pushed onto and clamped against the circumferential surface of the winding spindle 3.1 and the circumferential surface of the winding spindle 3.2, respectively. For this purpose, the winding bobbin 6 is first pushed onto the free ends of the winding spindles 3.1 and 3.2.

The winding spindle 3.1 in the winding region is assigned a pressure roller 9 and a traversing device 11 for winding the thread 12. The traversing device 11, the pressure roller 9 and the winding spindle 3.1 are held one after the other in the thread running direction on the machine frame 1 in order to place the input thread 12 onto the cylinder surface of the bobbin 7 in a cross-winding manner, by guiding the thread in a reciprocating manner in the traversing device 11 by means of the pressure roller 9. The pressure roller 9 is held on a roller block 10 which is preferably designed to be movable and serves as a sensor for controlling the avoiding movement of the bobbin to be wound. For this purpose, the lifting of the pressure roller 9 can be detected, for example, by a sensor which is connected to the rotary drive 4 of the winding turret 2 via a control circuit.

In the operating state shown in fig. 1, the winding spindle 3.2 with the wound package 7 is located in the exchange region. In the exchange region, a push-off device 8 is assigned to each winding spindle, in this case the winding spindle 3.2. The ejection device 8 has a pusher mechanism 13 which is movable in the axial direction of the winding spindle 3.2, said pusher mechanism 13 being able to be guided in a reciprocating manner along the winding spindle 3.2 by means of an ejection actuator 14.

The cleaning means 15 is associated with the thrust means 13 and is held axially displaceable on the circumference of the winding spindle 3.2.

For further explanation of the push-off device 8, reference is also made to the illustration in fig. 2 in fig. 1.

In the cross-sectional view of fig. 2, a pusher mechanism 13 and a cleaning mechanism 15 are shown. The cleaning means 15 is realized in the form of an annular stripping device 21 and is connected to a pusher ring 20 serving as a pusher shoe 13. The push ring 20 and the stripping means 21 are pushed onto the projecting winding spindle 3.2 as far as the bearing end and form a stop for the winding bobbin 6.

As can be seen from the illustration in fig. 1, the push ring 20 and the stripping device 21, which form the stop for the pushed-on winding bobbin 6, are likewise pushed onto the winding spindle 3.1.

As can be seen from the illustration in fig. 2, the stripping device 21 has a stripping member 24 which is supported in a contacting manner on the circumferential surface of the winding spindle 3.2. The stripping member 24 may use a soft plastic material here.

In the exchange region, the ejection device 8 serves to eject the wound bobbin 7 on the winding spindle 3.2 so that the winding spindle 3.2 can be loaded with a new winding bobbin. For this purpose, the pusher arm 19 is engaged in a recess 18 formed between the pusher ring 20 and the stripping means 21. The push arm 19 is fixedly coupled to the push actuator 14 and is moved parallel to the winding spindle 3.2. The pusher ring 20 and the stripping means 21 slide along the winding spindle, wherein the stripping member 24 surrounds the circumference of the winding spindle 3.2 in a contacting manner, which results in the surface of the winding spindle 3.2 being cleaned. The pusher ring 20 and the stripping means 21 move up to the free end of the winding spindle 3.2 until the stripping member 24 reaches the free end of the winding spindle 3.2.

As can be seen from the illustration in fig. 1, a suction device 22 with a collection funnel 23 is assigned below the free end of the winding spindle 3.2. The yarn residue, such as fluff, which is pushed out of the circumferential surface of the winding spindle 3.2 by the stripping device 21 can then be collected by the collection funnel 23 and discharged into the waste material by the suction device 22. After the bobbin 7 has been pushed out and the winding spindle 3.2 has been cleaned, the push ring 20 and the stripping means 21 are guided back to the bearing end of the winding spindle 3.2.

The embodiment of the push-off device shown in fig. 1 and 2 is particularly suitable for use in the case of winding spindles 3.1 or 3.2 having a perfectly smooth surface on their circumferential surface. Such winding spindles usually have a clamping device on the circumference in order to fix the winding bobbin 6 for receiving a thread package. In this connection, it is preferred to use brush-like stripping members for cleaning the circumferential surfaces of the winding spindles. To this end, a further embodiment of a potential push-off device 8 is schematically shown in the cross-sectional view of fig. 3.

The pusher mechanism 13 and the cleaning mechanism 15 are likewise held here in order to form an annular unit on the circumference of the winding spindle 3.2. The push ring 20 and the stripping means 21 can be moved in the axial direction of the winding spindle by means of a push arm 19, wherein the push arm 19 is fixedly coupled to a push actuator, not shown here.

The stripping device 21 as stripping means 24 has a brush 25 which is configured in an annular manner and contacts the circumferential surface of the winding spindle 3.2 by means of its bristles. While the package is being pushed out, the entire circumference of the winding spindle can be treated with a brush 25 to remove potential yarn residues. The function of the push-off device shown in fig. 3 is the same as the function of the embodiment according to fig. 1 and 2, and no further explanation is provided here.

In the exemplary embodiment according to fig. 1, 2 and 3, the ejection device 8 uses an ejection actuator in order to jointly guide the pusher mechanism 13 and the cleaning mechanism 15 along the winding spindles 3.1 and 3.2. In principle, however, it is also possible to guide pusher mechanism 13 and clearing mechanism 15 along the winding spindle in a mutually independent manner. For example, in the embodiment shown, the push ring 20 and the stripping means 32 can be separated in order to perform cleaning of the winding spindle after the package has been pushed away. In addition to the translational movement of the cleaning mechanism 14, the stripping device 21 can also perform a rotational movement along the winding spindle, in particular in the case of brush-like stripping members. Thus, by the superposition of the translational and rotational movements of the stripping device 21, a high degree of cleaning of the winding spindles can be achieved. In addition, when the pushing mechanism and the cleaning mechanism are separated, the cleaning operation can be performed in reverse cycle to the pushing operation. For example, after every five pushing-off actions of the yarn package, cleaning can be carried out on one of the winding spindles.

Fig. 4 shows another embodiment of a potential push-off device. Fig. 4 shows a cross-sectional view of the pushing mechanism 13 and the cleaning mechanism 15 on the circumferential surface of the winding spindle 3.2.

In this embodiment, the pusher shoe 13 is formed by a push fork 26, which is fixedly coupled to a push actuator, not shown here. The thrust fork 26 offers the advantage that no separate thrust mechanism has to be retained on the circumferential surfaces of the winding spindles 3.1 and 3.2 according to the exemplary embodiment of fig. 1.

The winding spindles 3.1 and 3.2 can be alternately introduced into the thrust forks 26 by a rotary movement of the winding turret 2. For this purpose, the pusher fork 26 is configured to be rotatable so as to be able to alternately receive the winding spindles 3.1 and 3.2. The push fork 26 for displacing the package is moved translationally along the winding spindle by the push actuator, so that the package is fed to the free end of the winding spindle.

The cleaning device 15 is realized separately on the circumference of the winding spindle and is designed as an annular nozzle device 27. The nozzle device 27 is connected to an actuator 16 which moves the nozzle device 27 axially along the winding spindle. The nozzle arrangement 27 has a plurality of air nozzles 28 which are directed at the circumferential surface of the winding spindle 3.2. The air nozzle 28 is connected via a compressed air line 29 to a compressed air source, not shown here, which can be activated during the pushing movement of the nozzle device 27. In this regard, the winding spindle surface may be impinged by air streams to blow away potential yarn remnants and fuzz. However, such a push-off device is preferably used only in winding machines of the type in which shielding of the winding spindles is provided in the replacement region. By means of the actuator 16, the nozzle device 27 can be guided independently of the pusher fork 26. The nozzle device 27 can thus perform cleaning of the winding spindle after, for example, every second push-out operation of the bobbin.

In the exemplary embodiment of the push-off device 8 according to fig. 4, the pusher mechanism 13 and the cleaning mechanism 15 are guided independently of one another along the winding spindle, as shown in fig. 4. This method variant can also be used in combination with a stripping device. It is then also possible to arrange the stripping means on the machine frame such that the winding spindles 3.1 and 3.2 come into contact with the stripping members of the stripping means only in the replacement region. The stripping means can thus be formed, for example, by brushes which are placed in contact with the respective winding spindle in the replacement region in the form of half shells or forks. To clean the winding spindles, the winding spindles are driven at a low rotational speed while the stripping member is moved along the winding spindles. The combination of the translational movement of the stripping member and the rotational movement of the winding spindle likewise results in a powerful cleaning.

Claims

1. Method for pushing off at least one bobbin, wherein the bobbin is held on a projecting winding spindle and a pusher mechanism can be guided along the winding spindle, characterized in that during or after the movement of the bobbin, yarn residues are removed from the circumference of the winding spindle.

2. Method according to claim 1, characterized in that the peripheral surface of the winding spindles is cleaned by contacting a stripping member, wherein the stripping member is moved along the winding spindles.

3. The method according to claim 2, characterized in that the circumferential surface of the winding spindle is brushed.

4. Method according to claim 1, characterized in that the circumferential surface of the winding spindle is impinged by an air flow of a nozzle device, wherein the nozzle device is moved along the winding spindle.

5. Method according to any one of claims 1 to 4, characterized in that loose yarn residues falling at the free end of the winding spindle are collected and sucked.

6. A device for pushing off at least one bobbin, which is held on a projecting winding spindle (3.1,3.2) of a winding machine, having a pusher mechanism (13) and a push actuator (14) for moving the pusher mechanism (13) along the winding spindle (3.1,3.2), characterized in that a movable cleaning mechanism (15) is provided, by means of which cleaning mechanism (15) yarn residues are cleaned off the circumference of the winding spindle (3.1,3.2) during or after pushing off the bobbin (7).

7. Push-off device according to claim 6, characterised in that the cleaning mechanism (15) has a stripping device (21), by means of which stripping device (21) a stripping member (24) can be held in contact on the circumferential surface of the winding spindles (3.1, 3.2).

8. Push-off device according to claim 7, characterised in that the stripping member (21) is formed by an annular brush (25).

9. Push-off device according to claim 6, characterised in that the cleaning means (15) have an annular nozzle device (27), by means of which annular nozzle device (27) an air flow can be generated over the circumferential surface of the winding spindles (3.1, 3.2).

10. Push-off device according to one of claims 6 to 9, characterised in that the clearing means (15) is connected to the push-moving means (13) and can be moved jointly with the push-moving means (13).

11. Push-off device according to one of claims 6 to 9, characterized in that a separate actuator (16) is assigned to the clearing means (15) and in that the push-on means (13) and the clearing means (15) are individually movable along the winding spindles (3.1, 3.2).

12. Push-off device according to one of claims 6 to 11, characterized in that the cleaning means (15) are assigned a suction device (22) at the free end of the winding spindles (3.1, 3.2).

13. Winding machine for winding a yarn with at least one protruding holding winding spindle (3.1,3.2) for receiving a package (7) and a push-off device (8) according to one of claims 6 to 12.