CN108657869B

CN108657869B - False twist texturing machine with winding equipment

Info

Publication number: CN108657869B
Application number: CN201710197108.8A
Authority: CN
Inventors: 王小兵; 姜华
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2017-03-29
Filing date: 2017-03-29
Publication date: 2022-03-15
Anticipated expiration: 2037-03-29
Also published as: WO2018177793A1; CN108657869A

Abstract

The invention discloses a false twist texturing machine with a winding device, which comprises a plurality of winding devices which are arranged in a manner of longitudinally distributed in multiple layers and transversely distributed in sequence side by side, wherein the winding devices comprise a cradle which is used for clamping a winding tube and can rotate, a friction roller which can be driven to rotate and is contacted with the winding tube during winding, and a traverse yarn guiding device which is provided with a yarn guide capable of guiding the transverse movement of yarn, each winding device is provided with an inlet side used for receiving the yarn, wherein, along the advancing direction of the yarn, each winding device is provided with a conveying device arranged on the upstream side of the yarn guide to control the speed of the yarn, and the conveying devices are arranged in a multiple-layer manner. This arrangement has the advantage of improving the consistency of the softness of the wound bobbin.

Description

False twist texturing machine with winding equipment

Technical Field

The invention relates to a false twist texturing machine with a winding device, which can improve the consistency of wound bobbins.

Background

A generic textile machine is known from EP1926674a1, in which a false twist texturing machine is described as an example. The false twist texturing machine of this embodiment has a first supplying device, a first heating device, a cooling device, a false twist device, a second supplying device, a second heating device, a third supplying device, and a winding device in this order in order to draw, false twist, and deform a yarn. The winding plant is constituted by a certain number of winding devices. The winding devices are arranged in a mode of longitudinal multilayer lamination and transverse parallel arrangement. In the example of EP1926674, the winding devices are arranged in three layers on top of one another. The third feeding device is arranged in a row along the direction of the plurality of machine sections of the false twist texturing machine in a transverse superposed arrangement and extends, and is positioned at the upstream side of the winding device relative to the advancing direction of the yarn. According to the path of the yarn, the yarn enters the second heating device, then enters the third feeding device, is intensively conveyed to the winding device of the winding device, and is finally wound and formed in the winding device. Thus, the yarns have different "pre-wind lengths" before entering the respective winding devices. "pre-wind length" refers to the length of yarn from the third supply to the yarn guide. For example, the "pre-winding length" of the yarn reaching the winding device of the second layer is longer than the "pre-winding length" of the yarn reaching the winding device of the lowermost layer.

This situation therefore makes it very easy to create differences in the tension values of the yarns with different "length before winding" on the different layers. Especially for tension sensitive yarns such as nylon, the final formed cakes of the different layers have different degrees of softness, which is contrary to what is desired by the use of false twist texturing machines.

Disclosure of Invention

Based on the aforementioned disadvantages of the prior art, the problem addressed by the present invention is to provide a false twist texturing machine with a winding device which avoids the aforementioned disadvantages. To achieve this object:

according to a first aspect of the invention, a false twist texturing machine has a winding device with several winding devices, which are arranged in a longitudinally multi-layer arrangement and laterally side by side one after the other, wherein the winding devices comprise a cradle which is rotatable for holding a winding tube, a friction roller which can be driven in rotation and which is in contact with the winding tube during winding, and a traversing thread guide device with a thread guide which guides the transverse movement of the thread, wherein each winding device has an inlet side for receiving the thread, wherein, in the thread advance direction, each winding device is assigned a transport device which is arranged upstream of the thread guide for controlling the speed of the thread, wherein the transport devices are arranged in layers.

In this way, each yarn is fed at a specific speed into the winding device after entering said feeding device, which is arranged in multiple layers, arranged in correspondence of the multiple layers of the winding device. This solution therefore has the advantage of reducing the difference in the "length before winding" of the yarn between the different layers. This advantage provides consistency in the formed cake softness at all winding positions.

In order to achieve a yarn feed to the winding device at a constant speed, it is necessary for the drive to actively drive the feed device, so according to a second aspect of the invention, the feed device is driven by the drive to actively feed the yarn to the winding device, preferably the feed device associated with each winding device is arranged on the inlet side of the winding device.

According to a third aspect of the invention, the shortest yarn distance between the delivery device associated with each winding device and the yarn guide of its corresponding winding device is the same. In this way, by minimizing the inconsistency in the "length before winding" of the yarn, the tension difference before the yarn enters the winding device is minimized.

According to a fourth aspect of the present invention, the transport device is configured as a nip type structure having a driven roller mechanism and a nip mechanism. The clamping structure enables the yarn to be actively output out of the conveying device under the clamping action of the clamping mechanism and the rotating action of the driven roller mechanism.

According to a fifth aspect of the invention, the delivery device is designed as a winding arrangement with a driven godet and auxiliary roller. As a further possible configuration of the delivery device, the winding configuration allows the yarn to be wound in several windings around the driven godet and auxiliary roller, the yarn being actively delivered out of the delivery device under the influence of the winding friction. The yarn is less damaged than in the former conveyor configuration.

The conveying device can be subdivided into two configurations, in particular, on the basis of the operating principle of the clamping configuration.

A sixth aspect of the invention describes a first possibility of a clamp-type structure. The driven roller mechanism of the conveying device is arranged to comprise a driven shaft connected with the driving device, the clamping mechanism is arranged to comprise a pressing roller which can abut against the circumference of the driven shaft, and a yarn gripping point is formed between the driven shaft and the pressing roller. Rotation of the driven shaft causes the yarn to be fed in one direction.

A seventh aspect of the invention describes a second possibility of a clamp-type structure. The driven roller mechanism of the conveying device is arranged to comprise a driven shaft connected with the driving device, the clamping mechanism is arranged to comprise two follower rollers and an endless belt arranged around the two follower rollers, and the driven shaft is tightly attached to the surface of the endless belt to form a yarn holding surface.

According to an eighth aspect of the present invention, the godets of the adjacent delivery units are respectively driven to rotate by motors of the plurality of driving units, wherein the motors are respectively controlled by lower controllers of the plurality of driving units. The godets are driven individually so that even if the godets have a need to stop running due to yarn problems, the other godets can be unaffected by them.

According to a ninth aspect of the invention, the difference in speed between the speed at which the yarn is fed by all the transport devices and the speed at which the corresponding yarn is wound by the winding tube is the same. The speed at which the transport device feeds the yarn to the winding device and the speed at which the yarn is wound typically have a speed difference to achieve further stretching or further relaxation of the yarn. By keeping the speed difference uniform for each winding station, the yarn is subjected to the same stretching or relaxation for each winding station.

In order to obtain as uniform an operating parameter as possible for the machine as a whole, according to a tenth aspect of the invention, each of the transport devices is driven by a separate one of the drive devices, all of which are connected to the same superordinate control.

In order to obtain a uniform operating parameter of the transport devices of the winding plant of one part of the false twist texturing machine and to be different from the parameters of the transport devices of the winding plant of the other part of the false twist texturing machine, the drive devices are likewise arranged in drive groups according to an eleventh aspect of the invention, wherein the motors of all the drive devices of one of the drive groups are connected to one of several lower controllers.

Drawings

FIG. 1 is a schematic cross-sectional view of a false twist texturing machine having a winding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a false twist texturing machine having a winding apparatus according to another embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a false twist texturing machine having a winding apparatus according to a third embodiment of the present invention;

FIG. 4 is a partial front view of the lower winding apparatus of the embodiment of FIG. 1;

FIG. 5 is a partial front view of the lower winding apparatus of the embodiment of FIG. 2;

FIG. 6.1 is a control block diagram of the conveying apparatus of the present invention;

FIG. 6.2 is another control block diagram of the conveying apparatus of the present invention;

fig. 6.3 is a control block diagram of another conveying device of the invention.

Detailed Description

False twist texturing machines are used to process thermoplastic fibers such as polyester, nylon, etc. to obtain fibers of higher elasticity. FIG. 1 shows a schematic cross-sectional view of a false twist texturing machine having a winding device according to the present invention as a first embodiment of the present invention. Although the different types of yarn require slightly different machine configurations, the basic configuration is substantially the same, since the yarns of the different machine types generally need to be drawn off, heated, cooled, false twisted, drawn and wound. It should be noted that the "upstream side" or "downstream side" mentioned in the following description is referred to the advancing direction of the yarn.

The structure of the false twist texturing machine will be described in the order in which the yarns are processed. The purpose of the false twist texturing machine is to process low elasticity pre-oriented yarn, so the device at the beginning is the creel 1 for supplying the raw material. The creel is divided by 1 into several layers, each layer having a substantially horizontally arranged bobbin shaft 1.1 for placing a bobbin 1.2. Usually, the end of one of the two bobbins 1.2 juxtaposed in a layer is combined with the tail of the other bobbin 1.2 to ensure the continuity of the supply of one yarn. The first supply device 3 provided on the main frame 8 is located on the downstream side of the creel 1. The known first supply device 3 can be constructed in a winding-type configuration or in a clamping-type configuration, known from CN 101272975. In this embodiment it is in the form of a godet structure consisting of a motor 3.3, a godet 3.2 and an auxiliary roller 3.1. The motor 3.3 directly drives the godet 3.2 to rotate, and the auxiliary roller 3.1 is parallel to and spaced from the godet 3.2. The yarn 2 is simultaneously wound several turns on the godet 3.2 and the auxiliary roll 3.1 while passing through the winding-type first feed 3, the winding angle on the godet 3.2 and the auxiliary roll 3.1, respectively, each time being less than 360 °. The yarn 2 is delivered from the first supply device 3 by the action of friction, so that the first supply device 3 draws the yarn 2 out of the creel 1. The yarn 2 is further subjected to a heat treatment in a heating device 4, and a cooling device 5 is provided next to the heating device 4 and applies a cooling treatment to the yarn 2. The false twisting device 6 is disposed downstream of the cooling device 5. Next to the false twisting device 6, a second supply device 7 is provided. Likewise, the second supply device 7 may alternatively be of a wound or clamped configuration. The second supply device 7 in this exemplary embodiment consists of a motor 7.3, a godet 7.2 and an auxiliary roller 7.1. The second feeding device 7 has a faster speed than the first feeding device 3, and therefore the yarn 2 is drafted between the second feeding device 7 and the first feeding device 3. Further, the false twisting device 6 twists the yarn 2 while the yarn 2 is heated and cooled, and thus a texturing and drawing zone is formed between the second supplying device 7 and the first supplying device 3.

The last step of the false twist texturing machine is a winding step performed by the winding device 10. The winding plant 10 in fig. 1 comprises a three-layer winding device 18. The winding device 18 in this embodiment is a so-called "same-side type" fully automatic winding device. By "same side type" is meant that the inlet side 23 into which the yarn enters is the same side as the side used to remove the full-lap cake. For example, referring to fig. 1, yarn 2 of the winding apparatus 10 in fig. 1 enters from the right side, and a full-package cake is taken out from the right side. Each winding device 18 is composed essentially of a winding table 29, a traversing thread guide 16, a driven friction roller 15, a winding tube 12, a cradle 11, a full cake path 14, an empty tube magazine 13 and a doffing device, not shown. The cradle 11 has one end capable of holding the winding tube 12 and the other end rotatably connected to the winding table 29. During normal winding, the winding tube 12 is kept in contact with the driven friction roller 15. The traverse yarn guide 16 located on the upstream side of the winding tube 12 and the friction roller 15 has a yarn guide 17 that is axially reciprocated along the winding tube. The means for driving the reciprocating motion of the wire guide 17 may be a belt type or a grooved cylinder type as known. The thread guide 17 ensures that the thread 2 is laid uniformly in the axial direction of the winding tube 12 when being wound onto the winding tube 12, so as to finally form a cake of a specific shape. After the cake reaches a predetermined size, the cradle 11 rotates until the cake reaches the full wrap track 14 above the traversing yarn guide 16. The cradle 11 releases the cake which rolls onto the full-lap track 14. After that, the empty tube of the empty tube magazine 13 is supplied to the cradle 11. The cradle 11 is then rotated to bring the empty tube into contact with the friction roller 15, and a new winding cycle is started.

On the entry side 23 of each winding device 18 for receiving the thread, each winding device 18 is assigned a transport device 19 of wound construction, which is arranged upstream of the thread guide 17. The thread 2, after exiting from the second supply device 7, passes through the rear side, opposite the inlet side 23, and enters the transport device 19 through the space below the corresponding winding table 29 at a certain angle by means of the godets 9 associated with each winding layer, the path of the thread being such that the total distance travelled by each thread 2 is short. The transport devices 19 are arranged in a multi-layer stack in three layers of the winding plant 10. Since the false twist texturing machine comprises a plurality of work stations for processing several threads, a plurality of winding devices 18 and a plurality of transport devices 19 are arranged laterally next to one another. The above arrangement will be further explained with reference to fig. 4. Fig. 4 shows a partial front view of the winding device 10 in the embodiment of fig. 1 and only schematically shows the cake, the thread guide 17 and the delivery device 19. The delivery device 19 in this embodiment is mainly composed of a godet 24, a base 30, a motor 26 and an auxiliary roller 25. The godet 24 and the auxiliary roller 25 are rotatably mounted on a base 30. The godet 24 is directly driven to rotate by a motor 26. An auxiliary roller 25, which is not driven by a driving source, is disposed in parallel with the godet 24 at a certain distance, and the auxiliary roller 25 and the godet 24 are disposed in parallel with the cake. The yarn 2 is fed in such a way that it is wound several turns simultaneously on the auxiliary roller 25 and the godet 24. All the transport devices 19 in this embodiment are designed to be identical in construction and the number of transport devices 19 is identical to the number of winding devices 18.

Fig. 2 and 5 show another embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the lower false twist texturing machine of this embodiment, and FIG. 5 is a partial front view of the lower winding apparatus 10 of this embodiment. Two figures are described below. For simplicity of description, only the differences from the embodiment of fig. 1 will be described. The difference in this embodiment is the construction of the transport device 19. The transport device 19 is a nip type structure mainly composed of a driven roller mechanism and a nip mechanism. In particular, all the winding devices 18 of a layer are provided with a driven roller 20 extending along the length of the winding apparatus 10, in short, the driven roller 20 can cover all the winding devices 18 of a layer. The driven rollers 20 are directly connected to a motor 26 to be driven in rotation, so that the three-layer winding device 18 of the winding apparatus 10 is provided with three driven rollers 20. Each winding device 18 is in turn provided individually with a clamping mechanism consisting of two follower rollers 21 and an endless belt 31 arranged around the two follower rollers 21. Under the action of a spring mechanism, not shown, the clamping mechanism is arranged in cooperation with the driven roller 20 in such a way that the endless belt 31 thereof abuts against the driven roller 20, so that the contact surface between the endless belt 31 and the driven roller 20 serves as a clamping surface for the yarn. The yarn 2 passes through this clamping surface.

Fig. 3 discloses another embodiment of the transport device as a clamp structure. FIG. 3 is a schematic cross-sectional view of another embodiment of the false twist texturing machine. Only the differences from the foregoing embodiments will be described below. The conveyor 19 in fig. 3 shows a different clamp-type configuration than the conveyor 19 in fig. 2. In principle, both are identical, and a grip between the two parts is used to form a nip or gripping surface for the yarn. In this embodiment, the transport device 19 comprises a driven shaft 20 connected to said motor, and likewise the driven shaft 20 is arranged extending in such a way as to cover all the winding devices 18 in a layer. Furthermore, the transport device 19 comprises a pressure roller 22 which can be placed against the circumference of the driven shaft 20. The pinch roller 22 is pressed against the driven roller 20 by a spring mechanism, not shown. The yarn 2 is gripped between the pinch roller 22 and the driven roller 20 to form a nip point for yarn delivery.

In principle, the structure of the feeding device 19 is not limited to the structure described in the three embodiments, and any device capable of actively feeding the yarn to the winding device 18 is included in the feeding device 19 of the present invention.

As further shown in the embodiments of fig. 4 and 5, the shortest yarn distance D of each delivery device 19 to its corresponding thread guide 17 of the winding device 18 is the same. Since the yarn guides 17 reciprocate left and right in operation, the "shortest yarn distance D is the same" means that the shortest yarn distance from each yarn guide to its corresponding delivery device is the same when the yarn guide 17 is facing the delivery device 19, and this distance can be defined as "length before winding". In this way, the "pre-wrap length" of the yarn is the same between the different layers. It should be noted that the tension of the yarn 2 before entering the winding device 18 is determined by two main factors, namely the speed difference between the winding device 18 and the delivery device 19, and the shortest yarn distance between the yarn guide 17 and the delivery device 19. Typically, the speed difference between each winding device 18 and its corresponding transport device 19 is controlled to the same value. Thus ensuring that the shortest yarn distance from each yarn guide to its respective delivery device is the same plays an important role in ensuring yarn tension consistency.

Fig. 6.1 is a control block diagram of the conveying device in the embodiment of fig. 1, 2 or 3. The conveyors 19.1 to 19.4 are each driven by a separate motor 26.1 to 26.4, each motor 26.1 to 26.4 being connected to a separate lower control 27.1 to 27.4 via a communication line. The lower controllers 27.1 to 27.4 for controlling the motors 26.1 to 26.4 are therefore frequency converters. All lower controllers 27.1 to 27.4 are connected to upper controller 28 via communication lines. The upper controller 28 can control the lower controllers 27.1 to 27.4 by setting the operating parameters. Fig. 6.2 shows another control mode of the conveying device in the embodiment of fig. 1, 2 or 3. The conveyors 19.1 to 19.4 are each driven by a separate motor 26.1 to 26.4, all motors 26.1 to 26.4 being controlled jointly by a lower control 27. The lower controller 27 is connected to the upper controller 28. This control of the drive of the conveyor 19 is advantageous, since all the controlled conveyors 19.1 to 19.4 can be operated at the same speed.

In general, a false twist texturing machine is formed by connecting twelve machine segments in a direction perpendicular to the paper surface. One machine section can generally carry out drawing deformation treatment on 12 yarns. The drives of the twelve conveyors in a machine section can therefore be regarded as a drive group, so that the drives of the conveyors of a false twist texturing machine can be divided into twelve drive groups. Fig. 6.3 shows by way of example the drives of a four-section conveyor, i.e. four drive groups 32.1 to 32.4. Wherein the drive groups 32.1 and 32.2 are controlled by respective lower controllers 27.1 and 27.2, respectively, and the drive groups 32.3 and 32.4 are controlled by the same lower controller 27.3. In this way, the machine user can control different machine sections respectively.

In the embodiments described above, the structure of the conveying device is exemplified. The basic principle is that the characteristics of the yarn after winding and forming are adjusted by arranging a device which can actively feed the yarn and is arranged in a plurality of layers near each winding device. Similarly, the structure of the false twist texturing machine in the above embodiment is also illustrative and not limiting to the present invention. For example, another feeding device may be provided immediately after the second feeding device for further stretching, or a setting heating device may be provided in a space below the second feeding device to satisfy a higher requirement for heat treatment of yarns such as polyester.

Claims

1. A false twist texturing machine having a winding apparatus with several winding devices which are arranged in a longitudinally multi-layer arrangement and laterally side by side one after the other, wherein the winding devices comprise a rotatable cradle for holding a winding tube, a friction roller which can be driven in rotation and which is in contact with the winding tube during winding, and a traversing thread guide with a thread guide which guides the transverse movement of the thread, wherein each winding device has an inlet side for receiving the thread, characterized in that,

each winding device is provided with a conveying device arranged on the upstream side of the yarn guide along the yarn advancing direction so as to control the speed of the yarn, wherein the conveying device is driven by a driving device and is arranged in a multi-layer mode; wherein, the shortest yarn distance between the conveying device matched with each winding device and the yarn guide of the corresponding winding device is the same.

2. A false twist texturing machine as claimed in claim 1, characterized in that the transport device is arranged to actively feed the yarn to the winding device, wherein the transport device associated with each winding device is arranged on the inlet side of the winding device.

3. A false twist texturing machine according to claim 2, characterized in that the transport device is constructed as a nip structure with a driven roller mechanism and a nip mechanism.

4. A false twist texturing machine as claimed in claim 2, characterized in that the transport device is constructed as a winding with a driven godet and auxiliary roller.

5. A false twist texturing machine according to claim 3, characterized in that the driven roller mechanism of the transport device is arranged to comprise a driven shaft connected to the drive device, the gripping mechanism being arranged to comprise a pressure roller which can bear against the circumference of the driven shaft, wherein a yarn gripping point is formed between the driven shaft and the pressure roller.

6. A false twist texturing machine according to claim 3, characterized in that the driven roller mechanism of the transport device is arranged to comprise a driven shaft connected with the drive device, the gripping mechanism is arranged to comprise two follower rollers and an endless belt arranged around the two follower rollers, wherein the driven shaft abuts against the surface of the endless belt to form a yarn gripping surface.

7. The false twist texturing machine of claim 4, wherein the godets adjacent to the delivery device are respectively driven to rotate by motors of the plurality of driving devices, wherein the motors are respectively controlled by lower controllers of the plurality of driving devices.

8. A false twist texturing machine according to any one of claims 1 to 7, characterized in that the speed difference between the speed at which the yarn is fed by all the transport devices and the speed at which the corresponding yarn is wound by the winding tube is the same.

9. A false twist texturing machine as claimed in claim 8, characterized in that each of the transport devices is driven by a separate drive device, all drive devices being connected to the same superordinate control.

10. A false twist texturing machine as claimed in claim 9, characterized in that the drives are arranged in several drive groups, wherein the motors of all the drives of one of the drive groups are connected to one of several lower controllers.