EP1397541B2 - Compressive crimping device for a synthetic multi-threaded yarn - Google Patents

Abstract

The invention relates to a compressive crimping device for a synthetic multi-threaded yarn. The thread is compressed by a texturing device to form a tangle of thread. Said tangle of thread is subsequently cooled by means of a cooling device and unraveled to form a crimped thread.The tangle of thread runs through a heating area in the transition area between the texturing device and the cooling device, said heating area being essentially defined by the distance between the tangle outlet of the texturing device and a tangle receiving element of the cooling device. According to the invention, a means of adjustment is provided in order to adjust the distance between the tangle outlet and the element receiving said tangle.

Description

The invention relates to a device for compression crimping of a synthetic multifilament yarn according to the preamble of claim 1.

A generic device is from the DE 42 24 454 A1 known

The known device has a texturing device for producing a yarn plug. In this case, a multifilament yarn is conveyed in the texturing device by means of a fluid flow and upset within a stuffer box to form a yarn plug. The filaments of the thread lay down in the form of loops and bows. The thread is heated to obtain a high embossing of the loops and sheets within the filaments. At a fixed distance below the texturing a cooling device is provided, through which the yarn plug is cooled. As a result, the loops and bows of the filaments are fixed within the yarn plug, resulting in a crimp resistance. The transition of the yarn plug from the texturing device to the cooling device thus represents a phase in which the heat contained in the yarn plug acts on the polymer of the yarn. The transition from the texturing device to the cooling device thus forms a warm section in which heat is neither added nor removed from the outside. In the known device, the length of the hot stretch is fixed.

It is an object of the invention to develop the device of the type mentioned in such a way that a flexible heat treatment of the yarn plug within the hot stretch is possible.

This object is achieved by devices with the features of claim 1 or 2.

Advantageous developments of the invention are defined in the subclaims.

The invention is characterized in that the length of the hot stretch, which is formed between a stopper outlet of the texturing device and a plug receptacle of the cooling device, is variable. Thus, depending on the polymer of the yarn and depending on the crimped yarn to be produced, optimum lengths of the hot stretch can be set in each case. For this purpose, an adjusting means is provided by which the distance between the plug outlet of the texturing device and the plug receptacle of the cooling device is adjustable. Thus, regardless of the speed of the yarn plug a very short hot section or a long hot section for thermal treatment of the yarn plug can be specified.

The adjusting means for varying the distance between the Texturiereimichtung and the cooling device cooperates with a height-adjustable texturing device or with a height-adjustable cooling device. In the event that the texturing device is designed to be height-adjustable, the position of the stopper outlet of the texturing device is changed relative to the stopper receptacle of the cooling device by the adjusting means.

In a height-adjustable cooling device, the actuating means acts such that the position of the plug receptacle of the cooling device is variable relative to the position of the stopper outlet of the texturing device. In principle, electrical, electromechanical or electrohydraulic devices are suitable as adjusting means.

In a particularly preferred embodiment, the cooling device is formed by a cooling drum, which has at least one plug groove forming the plug receptacle, which is arranged circumferentially around the cooling drum. The cooling drum is driven at a peripheral speed that is substantially matched to the speed of the yarn plug to ensure uniform plug formation within the texturing device. However, it is also possible to change the peripheral speed of the cooling device to influence the plug formation within the texturing device.

In order to enable a safe guiding of the thread stopper from the texturing device, the stopper outlet is preferably formed by a discharge tube. In this case, a minimum distance is preferably maintained between the end of the discharge tube and the Stopfennut the cooling drum, so that a trouble-free transition of the yarn plug from the texturing device is possible in the cooling device.

The discharge tube of the texturing device is preferably aligned substantially perpendicular to the plug groove of the cooling drum. Thus, a strong deflection of the yarn plug is effected, which allows a break-up and thus a better cooling of the plug on the cooling drum. However, it is possible that the dispensing tube is oriented substantially tangentially to the plug groove. There is no significant deflection of the yarn plug instead.

The particularly advantageous development of the invention according to claim 6 is characterized in that not only the distance between the plug outlet and the plug receptacle but at the same time the degree of deflection of the yarn plug is adjustable. For this purpose, the impact position of the yarn plug is changed relative to the circumference of the cooling drum by the interaction of the actuating means with a displaceable relative to the cooling drum texturing device or with a relatively displaceable relative to the texturizing cooling drum. Thus, a short distance between the plug outlet and the plug receptacle is associated with a strong deflection of the yarn plug and vice versa a large distance with a small deflection.

The impact position of the yarn plug is advantageously determined by the degree of deflection, so that at the same time by the selection of a deflection angle meeting position of the yarn plug can be determined. The deflection angle can be set in a range between 0 ° and 90 °.

Since the degree of deflection of the yarn plug essentially influences the subsequent cooling, in which the composite of the yarn plug is loosened more or less, a combination between a height-adjustable texturing device and a displaceable cooling drum or vice versa is a particularly preferred embodiment of the invention. Thus, a small deflection of the yarn plug with a short distance so a short warm distance can be combined. It is achieved a very slow-acting cooling of the yarn plug. Likewise, a long warm stretch can be combined with a strong deflection of the yarn plug.

For texturing the thread, the texturing device preferably has a nozzle-shaped conveying channel and a. Stuffer box, wherein the thread is guided within the conveying channel of the texturing through a conveying fluid and opens into the stuffer box. However, it is also possible to use Texturiereinrichtungen in which the thread conveyed by means of conveyor rollers and are guided in a Stauchkamimer.

When using closed texturing with adjacent stuffer box, it is necessary that at the beginning of the process, the plug outlet is first closed briefly to obtain a Fadenstopfenautbau. In this phase, it is advantageous if the height-adjustable cooling device can be guided into an abutment position. Thus, the texturing device is freely accessible for applying a thread and for starting the process. After the yarn plug is formed and conveyed, then the cooling device is returned to an operating position in which a predetermined for the respective process hot stretch is set.

The device according to the invention is particularly suitable for curling freshly spun synthetic multifilament yarns of polyamide, polyester or polypropylene. The individually adjustable warm stretch allows optimum texturing with very high crimp resistance for every type of polymer and every yarn that can be produced. However, it is also possible to immediately curl a drawn from a supply bobbin thread by means of the device according to the invention.

In the following the invention will be explained in more detail with reference to some embodiments according to the accompanying figures.

Fig. 1

schematisch ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung,

Fig. 2 und Fig.3

schematisch weitere Ausführungsbeispiele der erfindungsgemäßen Vorrichtung.

They show:

Fig. 1

schematically a first embodiment of the device according to the invention,

Fig. 2 and Fig.3

schematically further embodiments of the device according to the invention.

In Fig. 1 The device consists of a texturing device 1 and a downstream of the texturing device 1 cooling device 2. The texturing device 1 has a nozzle-shaped conveying channel 6. The conveying channel 6 here consists essentially of two sections, which are separated by a narrowest cross-section. In a first section, just before the narrowest cross section, nozzle bores of an injector 5 open into the delivery channel 6. The injector 5 is connected to a fluid source (not shown here). In the second section below the narrowest cross-section of the delivery channel 6 expands and opens into an immediately adjacent stuffer box 19th

In the inlet region of the stuffer box 19, the stuffer box wall is formed permeable to air and disposed within a discharge chamber 7. Below the discharge chamber 7, the stuffer box 19 is continued by a discharge tube 8 with a substantially unchanged cross-section. At the end of the discharge pipe 8, a plug outlet 9 is formed.

The Texturiereinrichtung 1 is designed to be height adjustable and connected to a control means 3. For this purpose, the texturing device 1 is connected via a carrier 14 with a movable carriage 17, which carriage 17 is guided in a guide 15. To position the texturing device 1 or the carriage 17, a positioning cylinder 16 engages the carrier 14. The adjusting cylinder 16 is controllable via control means, not shown here, that any position of the texturing device 1 is substantially adjustable in the vertical direction. Thus, the distance A between the stopper outlet 9 of the texturing device 1 and a stopper receptacle 11 of the cooling device 2 can be adjusted. The distance A forms after leaving the compression chamber 19 a hot stretch, in which the yarn plug 10 is added or removed substantially no additional heat.

The cooling device 2 is designed as a rotatable cooling drum 12. The cooling drum 12 is driven via a shaft 13 at a peripheral speed which is substantially equal to the emergence speed of the yarn plug 10. The cooling drum 12 has a plug groove 11 surrounding the circumference for plug accommodation. The circumference of the cooling drum 12 is formed permeable to air, so that from the inside to the outside or from outside to inside generated cooling air flow penetrates the guided in the Stopfennut 11 yarn plug 10 and cools. After cooling of the yarn plug 10, the yarn plug is peeled off to a crimped yarn.

At the in Fig. 1 illustrated embodiment, the texturing device 1 is held by the adjusting means 3 in a position in which the distance A between the plug outlet 9 and the plug receptacle 11 sets. The position remains during the Texturing unchanged. In the texturing device 1, a delivery fluid is fed into the delivery channel 6 via the injector 5. This creates at the upper end of the conveying channel 6, a suction, which sucks the thread 4 in the Texturiereinrichtung 1. The thread 4 is guided via the conveying fluid through the conveying channel 6 into the stuffer box 19. In the stuffer box 19, the thread 4 accumulates to form a thread stopper 10. The filament bundle of the thread 4 opens and the individual filaments of the thread 4 lie in loops and bows on each other. The formation of the yarn plug 10 is determined here essentially by the nature of the conveying fluid and the pressure of the conveying fluid. Hot air is preferably used as conveying fluid. To reduce the fluid pressure of the conveying fluid, the upper region of the compression chamber 19 is designed to be air-permeable in the form of louvers or louvers so that the delivery fluid can escape into a discharge chamber 7 and from there to the outside. The yarn plug 10 is passed through the plug chamber 19 to the plug outlet 9 at a defined speed. After passing through the warm section of the yarn plug 10 is taken over by the Stopfennut 11 of the cooling drum 12. At the periphery of the cooling drum 12, the yarn plug is cooled by a cooling air flow. In this case, the cooling drum 12 preferably rotates in the direction of the arrow at a peripheral speed which is equal to the speed of the yarn plug 10. After cooling, the yarn plug 10 is withdrawn from the periphery of the cooling drum 12 as a crimped yarn.

To cool the yarn plug 10 immediately after leaving the texturing device 1 is in Fig. 1 a position shown in dashed lines, in which a minimum distance between the plug outlet 9 and the plug receptacle 11 is formed. The distance A _min thus forms a minimum warm distance in order to obtain as short a transition time as possible between the texturing in the texturing device 1 and the crimp fixing on the cooling drum 12.

Another advantage is given by the fact that a strong deflection of the yarn plug from the transition of the texturing device 1 is effected to the cooling device 2. This causes a breakage of the yarn plug 10, which leads to intensive cooling of the yarn plug 10 on the cooling drum 12.

Furthermore, it can thus influence the resistance in the movement of the yarn plug 10 in the stuffer box 19 of the texturing device 1. For example, a higher resistance in the course of the yarn plug 10 results in a more compact yarn plug having a greater density of the deposited filaments within the yarn plug 10.

In Fig. 2 schematically another embodiment of the device according to the invention is shown. The texturizer 1 and the cooling device 2 are identical to the embodiment of Fig. 1 educated. In that regard, the description goes to Fig. 1 Reference is made, and only the differences are described here.

At the in Fig. 2 the apparatus shown, the cooling device 2 is designed to be height adjustable and cooperates with the actuating means 3. The adjusting means 3 has a controllable actuating cylinder 16 and a control means not shown in detail for controlling the actuating cylinder 16. The adjusting cylinder 16 is connected to the carrier 18, at one end of the cooling drum 12 is held. At the opposite end of the carrier 18 is coupled to a height-adjustable carriage 17, which is guided in the guide 15

To set the warm distance, which is formed by the distance A between the plug outlet 9 of the texturing device and the plug receptacle 11 of the cooling device, the cooling drum 12 is adjusted by the adjusting means 3 in its position. By activating the adjusting cylinder 16, the cooling drum 12 can be guided on the carriage 17 down or up. Upon reaching the desired length of the warm section, the position of the cooling drum 12 is held. By fixing means, not shown here, a safe operation of the cooling drum 12 is ensured.

In Fig. 3 schematically another embodiment of the device according to the invention is shown The texturing device 1 and the cooling device 2 are identical to the embodiment of Fig. 1 educated. In that regard, the description goes to Fig. 1 Referenced.

The embodiment is shown in two different operating positions. This shows Fig. 3.1 the embodiment in an operating position with minimum warm distance and Fig. 3.2 with a maximum warm distance between the texturing device 1 and the cooling device 2. Unless expressly made reference to one of the figures, the following description applies to both figures.

At the in Fig. 3.1 and 3.2 the apparatus shown, the cooling device 2 is designed to be displaceable and cooperates with the actuating means 3. The adjusting means 3 has a controllable actuating cylinder 16 and a control means not shown in more detail for controlling the actuating cylinder 16 on the actuating cylinder 16 is connected to a carrier 18. The carrier 18 is L-shaped, at one end of the cooling drum 12 is held. At the opposite end, the carrier 18 is coupled to a sliding carriage 17. The carriage 17 is guided for this purpose in a horizontal guide 15.

The Texturiereinrichtung 1 is mounted in the yarn path above the cooling device 2 stationary.

To set the warm distance, which is formed by the distance A between the stopper outlet 9 of the texturing device 1 and the stopper receptacle 11 of the cooling device 2, the cooling drum 12 is adjusted by the adjusting means 3 in its position transverse to the thread running direction. By activating the Stellzylinzylinders 16, the cooling drum 12 can be on the carriage 17 in the illustrated arrangement to the left or right drove. Upon reaching the desired length of the warm stretch, the position of the cooling drum 12 is held.

In Fig. 3.1 the embodiment is shown in an operating position in which the hot section has a minimum length. In this case, the minimum distance A _{min is} set between the stopper outlet 9 of the texturing device 1 and the stopper receptacle 11 of the cooling device 2. In this position, the yarn plug 10 is deflected when hitting the plug receptacle 11. In the impact position of the yarn plug of the yarn plug 10 is deflected approximately at right angles. The deflection can thus be by a in the Fig. 3.1 Characterized deflection angle α characterize. The minimum distance A _min is thus associated with a deflection angle α = 90 °. Due to the strong deflection of the yarn plug 10, a break-up of the yarn plug 10 is caused when it hits the stopper 11 by the strong deflection, which leads to a more intense cooling at the periphery of the cooling drum 12.

In Fig. 3.2 the embodiment is shown in an operating position with maximum warm distance. Here, the yarn plug 10 is substantially tangential to the plug receptacle 11 of the cooling drum 2 on the yarn plug 10 is thus not deflected in the impact position on the circumference of the cooling drum 12. The deflection angle has the value 0. Thus, a maximum warm distance between the texturing device 1 and the cooling device 2 is achieved, which is characterized by the distance A _max .

By moving the cooling drum 12, any position in the area between the in Fig. 3.1 and 3.2 shown positions are realized. Here, each impact position of the yarn plug in the plug receptacle 11 on the circumference of the cooling drum 12, a certain deflection angle in the range between 0 and 90 ° can be assigned.

This in Fig. 3 illustrated embodiment of the device according to the invention can also be advantageous with a height-adjustable texturing device 1, as shown for example in the Fig. 1 is shown, combine. Thus, short warming distances could be realized, in which there is very little or no deflection of the yarn plug when hitting the plug receptacle.

Likewise, the embodiment of the device according to the invention could Fig. 3 Be formed to the effect that the texturing device 1 is designed to be displaceable relative to a stationary cooling device 2 Regardless of whether the texturing device 1 or the cooling device 2 are displaced, there is the additional advantage that an application of the thread can be executed even with a very short warm distance without any problem ,

In the Fig. 1 to 3 In principle, the invention is not limited to such constructive embodiments The inventive concept also covers such devices in which, for example, a promotion in the texturing device is performed by mechanical means. Likewise, cooling devices, which are designed as a cooling tube or as a horizontally running screen belt, detected. It is essential here in the transition region between the texturing device and the cooling device passed through warm stretch of the yarn plug. By the invention, the hot stretch can be flexible, so that depending on the underlying polymer of the thread or depending on the selected crimp optimal settings are possible.

Likewise, the design of the adjusting means in the illustrated embodiments by way of example as adjusting means and electrical or electronic devices are suitable. In this case, the texturing device and / or the cooling device can be designed to be movable. The height adjustment can also be performed by a swivel texturizer or a pivoting Kuhleinhchtung.

LIST OF REFERENCE NUMBERS

1. 1 texturing device
2. 2 cooling device
3. 3 actuating means
4. 4 threads
5. 5 injector
6. 6 conveyor channel
7. 7 discharge chamber
8. 8 discharge pipe
9. 9 stopper outlet
10. 10 thread plugs
11. 11 stopper receiving, Stopfennut
12. 12 cooling drum
13. 13 wave
14. 14 carriers
15. 15 leadership
16. 16 actuating cylinders
17. 17 sleds
18. 18 carriers
19. 19 stuffer box

Claims (10)

1. Device for compressive crimping of a synthetic multifilament thread (4), comprising a texturizing device (1) for creating a thread stuffing (10) and a cooling device (2) for cooling the thread stuffing (10), wherein a stuffing outlet (9) of the texturizing device (1) is arranged at a distance (A) to a stuffing holder (11) of the cooling device (2), characterized in that there is provided an adjusting means (3) by which the distance (A) between the stuffing outlet (9) of the texturizing device (1) and the stuffing holder (11) of the cooling device (2) is adjustable, wherein the texturizing device (1) is formed to be height-adjustable and cooperates in such a way with the adjusting means (3) that the position of the stuffing outlet (9) of the texturizing device (1) can be changed by the adjusting means (3).
2. Device for compressive crimping of a synthetic multifilament thread (4), comprising a texturizing device (1) for creating a thread stuffing (10) and a cooling device (2) for cooling the thread stuffing (10), wherein a stuffing outlet (9) of the texturizing device (1) is arranged at a distance (A) to a stuffing holder (11) of the cooling device (2), characterized in that there is provided an adjusting means (3) by which the distance (A) between the stuffing outlet (9) of the texturizing device (1) and the stuffing holder (11) of the cooling device (2) is adjustable, wherein the cooling device (2) is formed to be height-adjustable and cooperates in such a way with the adjusting means (3) that the position of the stuffing holder (11) of the cooling device (2) can be changed by the adjusting means (3).
3. Device according to one of the preceding claims, characterized in that the cooling device (2) is formed by a cooling drum (12) that has at least one stuffing groove (11) forming the stuffing holder, which is mounted so that the stuffing groove surrounds the circumference of the cooling drum (12).
4. Device according to one of claims 1 to 3, characterized in that the stuffing outlet (9) of the texturizing device (1) is formed by an ejection tube (8); and that the distance (A) between the end of the ejection tube (8) and the stuffing groove (11) of the cooling drum (12) has a minimum size.
5. Device according to claim 4, characterized in that the ejection tube (8) of the texturizing device (1) is aligned essentially perpendicularly or tangentially to the stuffing groove (11) of the cooling drum (12).
6. Device according to claim 1 or 2, characterized in that the cooling device (2) is a cooling drum (12) with the stuffing holder (11) formed on the circumference of the cooling drum and that the texturizing device (1) or the cooling drum (12) are realized to be slidable and cooperate with the adjusting means (3) in such a way that the arrival position of the thread stuffing (10) in the stuffing holder (12) can be changed.
7. Device according to claim 6, characterized in that the arrival position of the thread stuffing can be determined by the degree of deflection (deflection angle) of the thread stuffing, wherein a deflection angle in the range between 0° and 90° can be adjusted by the adjusting means (3).
8. Device according to one of the preceding claims, characterized in that the texturizing device (1) and/or the cooling device (2) are height-adjustable and/or can be displaced.
9. Device according to one of the preceding claims, characterized in that the texturizing device (1) has a nozzle shaped conveying duct (6) and a compressing chamber (19), wherein the conveying duct (6) is connected to an injector (5) and opens into the compressing chamber (19), wherein the compression chamber (19) is partially formed of an injection tube (8).
10. Device according to one of claims 2 to 9, characterized in that the cooling device (2) can be moved into a placement position, in which the texturizing device (1) is freely accessible for placing a thread.

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