WO2016096405A1

WO2016096405A1 - Device for texturing synthetic yarn

Info

Publication number: WO2016096405A1
Application number: PCT/EP2015/078203
Authority: WO
Inventors: Klaus Schäfer
Original assignee: Oerlikon Textile Gmbh & Co. Kg
Priority date: 2014-12-18
Filing date: 2015-12-01
Publication date: 2016-06-23

Abstract

The invention relates to a device for texturing synthetic yarn. The device comprises a first delivery device, a heating device, a cooling device, a texturing assembly and a second delivery device. In order to allow an energy-efficient thermal treatment of the yarn, the heating device is constituted by a heating drum having a heated heating jacket, said heating jacket being fixedly or rotatably mounted on a drum axis, and the yarn is guided on the circumference of the heating jacket and in contact therewith.

Description

Device for texturing a synthetic thread

The invention relates to a device for texturing a synthetic thread according to the preamble of claim 1.

In the manufacture of synthetic yarns, it is known that the smooth yarns produced in a melt spinning process are textured in a downstream second process. Such texturing processes are usually carried out with texturing machines which can treat a multiplicity of threads in adjoining processing stations. In this case, each of the treatment stations has a device for texturing, which contains at least a first delivery mechanism, a heating device, a cooling device, a texturing unit and a second delivery mechanism. As texturing aggregates, swirlers are preferably used which produce a false twist on the multifilament yarn. The so-called false twist propagates counter to the thread running direction on the thread and is fixed in the heating device and in the cooling device by thermal treatment in the filaments, so that at the end of the texturing process the filaments have a crimped structure. Such a device is known, for example, from EP 0 406 673 A2.

In the known device, in each case a curved heating rail and a curved cooling rail are used for the thermal treatment of the yarn. The thread is slidably guided with contact along the heating rail. Care should be taken to ensure that a false twist in the thread continues unhindered until the inlet of the heating rail. can plant. In that regard, the radius of curvature of the heating rail can not be arbitrarily reduced. In addition, such systems have a high heat loss, so that a considerable amount of insulation on the heating rail is necessary.

It is an object of the invention to develop a device for texturing a synthetic thread of the generic type such that in particular the thermal treatment of the thread with a significantly reduced energy consumption is possible.

Another object of the invention is to be able to carry out the thermal treatment of the thread within the texturing zone with high flexibility depending on the thread type and thread material. This object is achieved in that the heater is formed by a heating drum with a heated preferably heated heating mantle, wherein the heating mantle is held fixed or rotatable on a drum axis and wherein the thread on the periphery of the heating mantle with contact is feasible.

Advantageous developments of the invention are defined by the features and feature combinations of the subclaims.

The invention is characterized in that, depending on a relative movement between the thread and the heating jacket, a significantly better heat transfer can be achieved. Furthermore, variable heating sections can be provided on the circumference of the heating jacket by setting a fan realize the wrap. For this purpose, the heating jacket can be used both stationary and rotatable.

To improve the heat transfer is further provided that on the circumference of the heating jacket, one or more circumferential heating grooves are formed, in which one or more threads are feasible. In that regard, the heating drum is particularly suitable to heat several threads at the same time. The heating of the heating jacket is preferably carried out according to the embodiment of the invention, in which it is formed heating jacket of an electrically conductive material and in which the heating jacket is associated with an induction heater. Thus, the thermal energy needed to heat the thread can be directly generated even in the heating jacket. This can be very energy-efficient thread treatments perform. In principle, however, other heating systems can be used, which temper the heating jacket from the outside or inside. Even cooling is possible if a cold Vertsreckung the thread is to be realized. So that no premature spin stop occurs even with a rotating heating jacket, it has been found that the heating jacket has an outer diameter in the range of 100 mm to max. 2000 mm, preferably from 400 mm to max. Should have 1,500 mm. The heating jackets with larger outer diameter are particularly suitable for very sensitive threads.

In order to be able to set the relative movement between the heating jacket and the thread in the texturing zone, the development of the invention is preferably carried out in which the heating drum has an electrical connection. in which the heating jacket at a speed in the range of 0 to 2000 m / min, preferably up to 1000 m / min. drives. Thus, circumferential speeds can be set on the heating jacket, which are smaller, equal to or greater than the thread speed. At peripheral velocities of the heating jacket in the area of the thread speed, maximum dwell times for the thermal treatment of the thread can be realized.

To reduce the heat radiation losses, the development of the invention is provided, in which the heating jacket is arranged within an insulating housing and wherein the insulating housing has at least one thread inlet and a thread outlet. Thus, an increased ambient temperature can be realized in the immediate vicinity of the heating jacket, so that only very small heat losses can occur during operation.

The length extension of the texturing zone can be further minimized in the device according to the invention in that the cooling device is formed by a tempered cooling drum having a fixed or rotating cooling jacket. Thus, the cooling distance is determined by the circumference of the cooling jacket and the wrap-around degree of the thread. The cooling jacket is preferably tempered to a surface temperature of below 80 ° C. In principle, however, it is also possible in the production of certain yarns to temper the cooling jacket to a higher temperature.

Here, too, the cooling jacket can be used preferably for the treatment of a plurality of threads, one or more guide grooves being provided for the thread guide. The residence time of the thread at the circumference of the Cooling jacket can still be influenced by the cooling drum has an electric drive, which drives the cooling jacket in the opposite direction of rotation to the heating jacket of the heating drum. Thus, the heating drum and the cooling drum can be arranged side by side directly without additional thread guide elements in a machine frame.

In the event that several threads are thermally treated simultaneously on the heating drum and the cooling drum, it is further provided that on a drain side of the cooling drum several texturing units are kept in a spatial arrangement next to each other. Thus, treatment groups can be formed within a texturing machine, each of which textures a group of threads. In particular, in the texturing of synthetic threads of polyamide, a thermal aftertreatment is required. For this purpose, the development of the invention is provided, in which the second delivery mechanism, a second heating drum is arranged downstream, which lead the one or more threads on a heated heating jacket.

The device according to the invention for texturing a synthetic thread is suitable for obtaining a compact design of the treatment stations within a texturing machine. The improved heat transfer in the thermal treatment of the threads a significant energy savings compared to conventional systems is achieved. In addition, high production speeds can be achieved because the friction on the thread can be minimized. The invention will be explained in more detail below with reference to some embodiments of the device according to the invention for texturing a synthetic thread with reference to the accompanying figures. They show:

Fig. 1 shows schematically a first embodiment of the invention

Device for texturing a synthetic thread

2 schematically shows a further embodiment of the device according to the invention for texturing a synthetic thread. FIG. 3 shows schematically an embodiment of a heating drum for multifilament yarn treatment

4 schematically shows an exemplary embodiment of a cooling drum for multi-filament yarn treatment

1 shows schematically a first exemplary embodiment of the device according to the invention for texturing a synthetic thread. The device has a first delivery mechanism 4, which is formed from a driven godet 4.1 and an overflow roller 4.2. As in the first delivery mechanism 4, a supply spool 1 is arranged upstream, wherein a yarn 3 is drawn off via a yarn guide 2 from the supply spool 1 by the delivery mechanism 4.

The delivery mechanism 4 is followed by a texturing zone, in which a heating drum 5, a cooling drum 9 and a texturing unit 11 are arranged one behind the other to form a yarn path. The heating drum 5 has a rotatably mounted heating jacket 5.1, which is rotatably mounted on a drum axis 24. The heating jacket 5.1 has an outer diameter in the range of 100 mm to 2000 mm, preferably from 400 mm to 1500 mm and can be driven by a drive, not shown here. The heating jacket 5.1 is tempered by a heating means not shown here. The heating jacket 5.1 is shielded from the environment by an insulating housing 6. The insulating housing 6 has a thread inlet 7 and a thread outlet 8. The position of the thread inlet 7 and the thread outlet 8 is dependent on the looping degree of the thread on the circumference of the heating jacket 5.1. In the illustrated embodiment, the heating jacket 5.1 is wrapped with a wrap swinkel of about 180 ° of the thread 3. Usually, in the area of the thread inlet 7, a swirl-stop-agent still proceeds in order to limit a swirl generated in the thread.

The thread outlet 8 is assigned to the cooling drum 9 directly. The cooling drum 9 has a rotatably mounted cooling jacket 10 which is drivable by a drive, not shown here with an opposite direction of rotation to the heating jacket 5.1 of the heating drum 5. In this embodiment, the heating drum 5 has a larger outer diameter than the cooling drum 9. Basically, however, there is also the possibility that the cooling drum 9 in the outer diameter is equal to or greater than the heating drum 5 executed.

On a discharge side of the cooling drum 9, the texturing unit 11 is arranged. The texturing unit 11 is preferably designed as a false twisting device which generates a false twist on the thread 3. The texturing zone is delimited by a second delivery mechanism 12. The second delivery mechanism 12 also consists of a driven godet 12.1 and a rotatably mounted overflow roller 12.2. The second delivery mechanism 12 is followed by a take-up device 13, which is characterized in this case only schematically by a coil 14, a drive roller 15 and a coil holder 16. Usually, the thread before winding to a coil by means of a traversing device and forth. This is not shown in this embodiment.

In the exemplary embodiment illustrated in FIG. 1, a differential speed is set between the first delivery mechanism 4 and the second delivery mechanism 21, so that the thread 3 is fed within the texturing zone. For thermal treatment, the heating jacket 5.1 of the heating drum 5 is heated to a surface temperature in the range from 160 ° C to 280 ° C. In this case, the peripheral speed of the heating jacket in a range from a standstill to a peripheral speed of 2000 m / min, preferably 1,000 m / min. be set. Thus, the thread 3 on the surface of the heating jacket 5.1, depending on the process with high relative speed or without relative speed lead. Thus, the peripheral speed of the heating mantle 5.1, the surface temperature of the heating mantle 5.1 and the degree of wrapping of the thread around the circumference of the heating mantle 5.1 can be used to make individual settings for thermal treatment of the thread within the texturing zone. The thread 3 is preferably guided in the periphery of the heating jacket 5.1 in a heating groove. The fixation of the crimping initiated by the false twist into the filaments of the thread is then tempered by the cooling drum 9 at the circumference of the cooling jacket 10. The cooling jacket 10 is preferably cooled by the ambient air or by additional air conditioning air to a temperature below 80 ° C. The cooling jacket 10 can peripheral speeds in the range of 0 to max. 2,000 m / min, preferably 1,000 m / min. drive.

About the delivery mechanism 12, the textured yarn 3 is removed from the texturing and fed to the winding device 13, and wound into a coil.

Depending on the thread material, it is necessary that before winding the thread receives a thermal aftertreatment. For this purpose, an embodiment of the device according to the invention is shown in FIG. The embodiment of FIG. 2 is substantially identical to the embodiment of FIG. 1, so that at this point only the differences will be explained and otherwise referred to the above description.

In the embodiment shown in FIG. 2, the second delivery mechanism 12 is followed by a second heating drum 17, which has a rotatably mounted heating jacket 17.1. The heating jacket 17.1 is coupled to a drive (not shown here) and can be operated at a circumferential speed in the range from 0 to 2,000 m / min, preferably up to 1,000 m / min. drive. The heating jacket 17.1 is held encapsulated in an insulating housing 18, wherein the insulating housing 18 has a thread inlet 19 and a thread outlet 20 for thread guide. The thread outlet 20 is a third delivery mechanism 21 associated with a driven godet 21.1 and a rotatably mounted overflow roller 21.2. In the exemplary embodiment illustrated in FIG. 2, the thread textured from the texturing zone is guided on the periphery of the heating jacket 17. 1 of the second heating drum 17 for thermal aftertreatment. The heating jacket 17.1 is heated to a temperature in the range of 160 ° C to 280 ° C. In this case, the heating jacket 17.1 can be driven at a predetermined circumferential speed, so that a relative speed between the thread and the heating jacket 17.1 can be set.

The thread 3 is drawn off from the heating jacket 17.1 via the third delivery mechanism 21 and fed to the take-up device 13. The exemplary embodiment illustrated in FIG. 2 is thus particularly suitable for texturing synthetic threads made of polyamide.

In the embodiments of the device according to the invention shown in FIGS. 1 and 2, only one thread is shown in each case. In principle, the device is suitable in particular for texturing a plurality of threads. The structure of the device is identical to the embodiments shown in FIGS. 1 and 2, wherein the threads are preferably guided parallel to each other on the aggregates. In Fig. 3, an embodiment of a heating drum is shown for this purpose. The heating drum shown in Fig. 3 is indicated by the reference numeral 22. The heating drum 22 has a rotatable heating jacket 23, which is held on a drum axis 24. The drum axis 24 is mounted in a carrier 25 and connected to an electric motor 26. The carrier 25 protrudes in the cup-shaped heating jacket 23. At the periphery of the carrier 25, an induction heater 28 is arranged. The induction heater 28 has a plurality of electric coils, not shown here, in order to heat the heating jacket 23 via induced currents. The heating jacket 23 is for this purpose made of an electrically conductive material.

At the periphery of the heating jacket 23 has a plurality of parallel juxtaposed heating grooves 27. The heating grooves 27 have a circular cross-section, wherein the slot opening is formed eccentrically to the cross-section and thus forms an undercut. On the circumference of the heating jacket 23 in this embodiment, four heating grooves 27 shown side by side in parallel. The number of threads guided per heating drum is exemplary. In principle, a plurality of heating grooves 27 may be formed on the circumference of the heating jacket 23.

The structural design of the heating drum shown in Fig. 3 is also only exemplary. In principle, other heating means for heating the heating jacket 23 can be used. Thus, the heating jacket could also be heated by electrical resistors. Furthermore, the illustrated electric motor 26 is capable of driving the heating drum 22 at a low peripheral speed, for example, two revolutions per minute or at a high peripheral speed, for example, 1,000 m / min. drive. However, it is also possible to brake the electric motor, so that the heating jacket 23 is stationary with the drum axis 24.

In order to obtain the most compact possible arrangement of all processing units in a multi-filament texturing, a detail of the further exemplary embodiment of the inventive apparatus is shown in FIGS. 4.1 and 4.2. represented. FIG. 4.1 schematically shows a plurality of texturing units 29.1 to 29.4 on an outlet side of a cooling drum 9. The texturing units 29.1 to 29.4 are held next to one another in a spatial arrangement, the threads being spread after the cooling drum 9 has expired. The texturing units 29.1 and 29.4 are designed in this exemplary embodiment as a friction twist transmitter, in which the thread is guided between a plurality of friction disks which are held on three spindles. The texturing units 29.1 to 29.4 are followed by a second delivery mechanism 12, wherein the threads are guided together by a godet 12.1 and an overflow roller 12.2. The godet 12.1 is driven by a godet motor 30. The exemplary embodiment of the device according to the invention shown in FIGS. 4.1 and 4.2 is therefore also particularly suitable for simultaneously texturing a group of threads. The number of texturizing units held in a spatial arrangement is exemplary.

The invention is not limited only to the embodiments shown in Figures 1 and 2. Thus, winding devices can be used in which a plurality of coils are wound simultaneously on the circumference of a driven winding spindle.

The invention also makes possible completely new texturing processes in which the cooling drum is heated to a higher temperature above 80 ° C. in order simultaneously to initiate a relaxation treatment. Also, the drawing of the thread in the texturing zone could be carried out with a cold heating drum. The device according to the invention for texturing one or more synthetic threads is particularly suitable for achieving higher production speeds. Thus, the residence time required for the thermal treatment of the threads can be influenced by corresponding relative speed settings. Thus, an intensive thermal treatment can be carried out with relatively short heater lengths.

Claims

claims

Apparatus for texturing a synthetic thread with a first delivery mechanism (4), with a heating device (5), with a cooling device (9), with a texturing unit (11) and with a second delivery mechanism (12),

characterized in that the heating device by a heating drum (22) with a tempered, preferably heated heating jacket (5.1, 23) is formed, wherein the heating jacket (5.1, 23) is fixed or rotatably supported on a drum axis (24) and wherein the thread at the periphery of the heating jacket (5.1, 23) can be guided with contact.

Apparatus according to claim 1, characterized in that the heating jacket (5.1, 23) for thread guidance of the thread or a plurality of threads has a circumferential heating groove (27) or a plurality of parallel heating grooves (27).

Apparatus according to claim 1 or 2, characterized in that the heating jacket (23) is formed of an electrically conductive material and that the heating jacket (23) is associated with an induction heater (28).

Device according to one of claims 1 to 3, characterized in that the heating jacket (5.1, 23) has an outer diameter in the range of 100 mm to 2000 mm, preferably from 400 mm to 1500 mm.

5. Device according to one of the preceding claims, characterized in that the heating drum (22) has an electric drive (26) which the heating jacket (23) at a selectable speed in the range of 0 to 2000 m / min, preferably 0 to 1000th m / min drives.

6. Device according to one of claims 1 to 5, characterized in that the heating jacket (5.1) within an insulating housing (6) is arranged, wherein the insulating housing (6) at least one thread inlet (7) and a thread outlet (8) ,

7. Device according to one of the preceding claims, characterized in that the cooling device is formed by a tempered cooling drum (9) having a fixed or rotating cooling jacket (10) to which the thread can be guided with contact.

8. The device according to claim 7, characterized in that the cooling jacket (10) has one or more guide grooves on the circumference.

9. Device according to one of claims 1 to 8, characterized in that the cooling drum (9) has an electric drive and that the cooling jacket (10) with opposite direction of rotation to the heating jacket (5.1) of the heating drum (5) can be driven.

10. Device according to one of claims 1 to 9, characterized in that on a drain side of the cooling drum (9) a plurality Texturieraggregate (11) are held in a spatial arrangement next to each other.

Device according to one of claims 1 to 10, characterized in that the second delivery mechanism (12) is followed by a second heating drum (17) with a heating jacket (17.1) downstream, on which the thread is guided with contact.