EP1501968B1 - Texturing machine - Google Patents

Abstract

A texturing apparatus for draw texturing a synthetic yarn. To this end, the texturing machine comprises a first feed system, a heating device, a cooling device, a texturing unit, a second feed system, and a takeup device for winding the textured yarn. Between the heating device and the cooling device, a wetting device is provided for wetting the heated yarn with a cooling fluid for purposes of precooling. The wetting device consists of a rotatable cooling cylinder which includes on its circumference a yarn track that contains a cooling fluid. The yarn can be wetted by contacting the yarn track. At the point of contact, the yarn friction is advantageously dependent on the relative speed between the yarn and the yarn track on the circumference of the cooling cylinder.

Description

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

A generic texturing machine is known for example from EP 0 879 907 A1.

Such texturing machines are used to texturize one or more yarns to make a bulked and crimped yarn from a melt spun plain yarn, which is suitable for further processing into a knit or woven work. For this purpose, the spun smooth yarn is withdrawn from a supply spool within a texturing zone, which includes a heater, a cooling device and a texturing unit, textured, stretched and wound after the texturing into a coil. To improve the cooling effect, a wetting device is arranged between the heating device and the cooling device within the texturing zone, through which a cooling fluid is applied to the thread. For this purpose, the thread is guided over a wetted surface with contact, which causes additional yarn friction within the texturing zone. Thus, the return of a introduced by the texturing unit in the thread false twist in the thread is affected. Depending on the yarn type, this effect can have a positive effect beforehand, for example to prevent so-called searching. However, for yarn types characterized by a fine denier, this effect is so negative that the yarn within the heater is inadequately twisted during the thermal treatment.

The invention is therefore the object of developing a generic texturing machine of the type mentioned in such a way that the Thread between the heater and the cooling device is possible friction with a cooling fluid wetted.

Another object of the invention is to form the wetting of the yarn between the heater and the cooling device such that depending on the yarn speeds and the yarn types each desired yarn friction conditions are adjustable.

This object is achieved by a texturing machine with the features of claim 1.

Advantageous developments of the invention are mentioned by the features and the feature combinations of the subclaims 2 to 12.

The invention is characterized in that upon contact of the thread on the wetting surface, a yarn friction sets, which depends on the relative speed between the thread and the surface. For this purpose, the wetting surface is formed as a thread running track on the circumference of a rotatable cooling roller. In the thread running track on the circumference of the cooling roller a cooling fluid is kept, which is transferable in contact with the thread. Due to the rotational movement of the cooling roller, on the one hand, only a thread friction determined by the relative movement between the thread and the thread running track and, on the other hand, a continuous, uniform metered wetting of the thread is achieved. The running thread is constantly contacted with a metered wetted surface of the thread running track. The positive effects of the wetting of the thread, such as washing out of preparation residues and pre-cooling of the thread, are retained. The metering of the cooling fluid through the rotatable cooling roller is preferably dimensioned such that upon contact between the thread and the cooling fluid complete vaporization of the Kühlfuids occurs. This ensures that the thread runs absolutely dry into the downstream cooling device, so that, for example, cooling rails or cooling tubes, on the surface of the thread is guided, do not pollute. It However, it is also possible to choose the wetting of the thread such that a certain residual moisture in the thread is maintained. This variant is particularly applicable to cooling devices that cool the thread without contact by means of a free cooling zone. It can thus set any degree of dryness on the thread.

The particularly advantageous developments of the invention according to claim 2 and 3 have the advantage that the thread friction during wetting of the thread is adjustable. For this purpose, the cooling roller is driven by a cooling roller drive, which is preferably designed as an electric motor. The chill roll can thereby be driven both with the direction of rotation in the threadline and with the direction of rotation against threadline. In order to obtain the lowest possible yarn friction, the cooling roller is driven in the direction of rotation in yarn path. Thus, the thread friction can be minimized in a state in which the thread and the thread running track of the cooling roller have the same speeds. In order to produce, for example, a higher thread friction in other types of yarn, the cooling roller can also drive with the direction of rotation against the yarn path. Thus, the thread and the thread running track move in the opposite direction, resulting in a high thread friction in the wetting of the thread. By using a controllable electric motor can be independent of the wound direction of rotation to achieve an adjustment of the peripheral speed of the cooling roller to each set yarn running speed within the texturing.

At high yarn speeds over 1,000 m / min. to maintain a sufficiently large amount of cooling fluid in the thread running track, the thread running track is preferably designed according to an advantageous development as a groove on the circumference of the cooling roller. The thread is thus guided for wetting within the groove on the circumference of the cooling roller. The cross section of the groove is formed such that even with larger peripheral speeds of the cooling roller, an adhesion of the cooling fluid in the groove bottom remains ensured.

The cooling fluid is preferably supplied through a metering device of the yarn guide track on the circumference of the cooling roller. The metering device can be designed as a dip bath, which contains a supply of cooling fluid and in which the circumference of the cooling roller partially dips.

However, it is also possible to form the metering device through a nozzle which is arranged in the interior of the cooling roller or outside the cooling roller in order to supply the cooling fluid to the thread running track.

In a particularly advantageous embodiment of the invention, it is provided to arrange the heating device, the cooling roller and the cooling device to a substantially straight yarn path. This can form a texturing zone, in which additional thread guides and thus yarn friction can be avoided.

However, such low-friction texturing zones can also be achieved advantageously in the event of a kinked yarn path between the heating device and the cooling device in that the yarn deflection takes place through the cooling roller. Such a development of the invention is thus particularly suitable for achieving a compact machine structure. For this purpose, the heating device and the cooling device are preferably held in a V-shaped manner in a machine frame, wherein the cooling roller for deflecting the thread is arranged in the tip of the V-shaped arrangement.

In order to simultaneously wet several parallel threads at least, is provided according to an advantageous embodiment of the invention to perform the cooling roller on the circumference with several parallel running yarn tracks. In this case, each thread running track can be assigned a separate metering device or a common metering device.

Since the intensive cooling of the thread is accompanied by a cooling fluid immediately at the outlet of the heater with a vaporizing cooling fluid, which is Chill roller arranged according to an advantageous development within a collection chamber, so that the vapors generated by a connected to the collection chamber suction device can be discharged.

Further advantages and positive effects of the invention are described in more detail below with reference to some embodiments of the texturing machine according to the invention with reference to the accompanying drawings.

Fig. 1

schematisch eine Bearbeitungsstelle eines Ausführungsbeispieles der erfindungsgemäßen Texturiermaschine

Fig. 2

schematisch eine Querschnittsansicht der Benetzungseinrichtung der erfindungsgemäßen Texturiermaschine aus Fig. 1

Fig. 3

schematisch eine Querschnittsansicht eines weiteren Ausführungsbeispieles einer Benetzungseinrichtung

Fig. 4

schematisch ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Texturiermaschine mit einer Kühlwalze nach Fig. 3

They show:

Fig. 1

schematically a processing point of an embodiment of the texturing machine according to the invention

Fig. 2

schematically a cross-sectional view of the wetting device of the texturing machine according to the invention from FIG. 1

Fig. 3

schematically a cross-sectional view of another embodiment of a wetting device

Fig. 4

schematically another embodiment of a texturing machine according to the invention with a cooling roller of Fig. 3rd

In Fig. 1, a processing point of a first embodiment of a texturing machine according to the invention is shown schematically. On the presentation of the frame parts of a machine frame for fixing the individual processing units was omitted here

In a gate frame 3, a supply spool 1 is held. The feed bobbin 1 contains a thread 2, which is pulled off by a first delivery mechanism 4 from the supply spool 1. The first delivery mechanism 4 is followed by a heating device 5, a wetting device 6, a cooling device 9, a texturing unit 10 and a second delivery mechanism 11 in the yarn path. From the second Delivery mechanism 11, the thread 2 is guided to a winding device 12. In the winding device 12, the thread 2 is wound into a coil 15. The winding device 12 consists of a drive roller 13, a traversing device 14 and a bobbin holder 16. In this case, the coil 15 is driven by the drive roller 13 at a substantially constant speed.

Within the texturing zone formed between the first delivery mechanism 4 and the texturing unit 10, the wetting device 6 is arranged between the heating device 5 and the cooling device 9. The wetting device 6 has a rotatably mounted cooling roller 7, which will be described in more detail below. The cooling roller 7 is arranged in a collecting chamber 8. The collecting chamber 8 is connected in a suction device, not shown here.

In the texturing machine according to the invention shown in Fig. 1, the yarn 2 is drawn after deduction of the supply spool 1 within a texturing and simultaneously textured. For texturing, a false twist is generated on the thread 2 by the texturing unit 10, which is preferably formed by a friction encoder. The false twist propagates in the yarn 2 counter to the thread running direction within the texturing zone, so that a crimping of the mulitfilen thread 2 takes place by the arranged in the texturing zone heater 6 and downstream cooling device 9. The heating device 6 is preferably designed as a high-temperature heater whose heating surfaces is heated at a temperature above the melting temperature of the thread. The thread 2 is guided for this purpose substantially without contact by the heater 6. However, it is also possible to form the heater 5 through a contact heater. After the heat treatment, the thread is guided into the wetting device 6. For this purpose, the thread 2 enters via a thread inlet into the collection chamber 8 and strikes the driven with a peripheral speed cooling roller 7. At the periphery of the cooling roller 7, a cooling fluid is held in a thread running track, through which the heated yarn. 2 is wetted. The amount of the cooling fluid, which is applied to the yarn 2, is dimensioned such that the yarn after leaving the Sammelkamnier 8 no longer has any cooling fluid residues, since they are vaporized within the collection chamber 8. The resulting steam is removed by the suction device, not shown here.

After the pre-cooling of the thread 2, a residual cooling of the thread 2 takes place within the cooling device 9. For this purpose, the cooling device 9 could be designed as a cooling rail or as a cooling tube, on the surface of which the thread is brought into contact. However, it is also possible to form the cooling device through a free cooling zone, in which the thread is cooled without contact by an external air or ambient air.

After cooling, the thread 2 passes through the texturing unit 10 and is guided by the second delivery mechanism 11 to the winding device 12. The first delivery mechanism 4 and the second delivery mechanism 11 are driven at a differential speed, so that the yarn 2 is stretched simultaneously.

In the exemplary embodiment of the texturing machine shown in FIG. 1, the first delivery mechanism 4, the heating device 5, the wetting device 6, the cooling device 9 and the texturing unit 10 are arranged in a thread running plane. This achieves a straight thread run within the texturing zone, which does not require additional thread guide elements. In order to adjust the thread friction when wetting the thread to the required values, the cooling roller 7 is driven by a roller drive. 2, an example of the cooling roller 7 is shown schematically in a cross-sectional view. The cooling roll 7 has a roll shell 18 which is connected by a hub 19 to a free end of a motor shaft 20. The motor shaft 20 is rotatably driven via an electric motor 21 such that the cooling roller 7 is rotationally driven in the thread running direction (as shown in Fig. 1). On the circumference of the cooling roller 7 is a thread running track 24 in the form of a circumferential Groove 17 formed. The groove 17 has a V-shaped cross-section, wherein the groove flanks of the groove 17 form an angle of preferably <90 °. The cooling roller 7 is associated with a metering device 25. In this embodiment, the metering device 25 is formed by an immersion bath 22, which stores a cooling fluid 23. The cooling roller 7 and the immersion bath 22 are arranged relative to one another in such a way that the cooling roller dips segment-shaped into the cooling fluid 23 within the immersion bath 22. The immersion depth of the cooling roller 7 is dimensioned such that the groove cross section of the groove 17 is completely filled on the circumference of the cooling roller 7 within the dip bath 22 with the cooling fluid 23. On the opposite side of the cooling roller 7 to the immersion bath 22, the yarn 2 is guided in the groove 17 on the circumference of the cooling roller 7.

Due to the rotation of the cooling roller 7, a quantity of cooling fluid 23 held constantly in the groove 17 is conveyed out of the dipping bath 22 and conveyed to the point of contact between the running thread 2 and the cooling roller 7. The cooling fluid 23 received by the thread 2 for wetting from the groove 17 is thus constantly renewed by rotation of the cooling roller 7, whereby a thread friction arising between the groove 17 and the thread 2 is dependent on the relative speed between the thread 2 and the groove 17. Here, the cooling roller 7 can be driven by the electric motor 21 at such a peripheral speed, that the lowest possible yarn friction acts on the yarn 2. On the other hand, this also ensures that upon contact with the heated thread no mechanical damage such as filament breaks can occur on the thread.

In Fig. 3, a further embodiment of a wetting device with a rotatable cooling roller 7 is shown schematically. The cooling roller 7 are formed on the circumference a plurality of parallel yarn running tracks 24. Shown are - in this embodiment, three side by side running thread tracks 24. Each of the thread running tracks 24 is formed by a widening ring 27 attached to the circumference of the cooling roller 7. The wetting ring 27 is formed of a porous material which is liquid-permeable. in the Inside the cooling roller 7, a metering device 25 is arranged, which has a plurality of nozzles 26. The nozzles 26 are assigned to the wetting rings 27 in the roll shell 18 of the cooling roller 7 inside. To wetting the wetting rings 27 openings could be formed in the roll shell 18, so that a direct contact between the emerging from the nozzles 26 cooling fluid takes place with the wetting rings 25. In the yarn tracks 24 on the circumference of the wetting rings 27, a respective thread is guided with contact, so that a simultaneous wetting of a plurality of threads through the cooling roller is executable.

In the embodiment of the wetting device shown in Fig. 3, however, there is also the possibility that the metering device is arranged outside the cooling roller, so that the nozzles spray the cooling fluid from the outside onto the wetting rings.

FIG. 4 schematically shows a further embodiment of the texturing machine according to the invention, in which a wetting device shown in FIG. 3 is provided.

In the longitudinal direction-in FIG. 4, the plane of the drawing is equal to the transverse plane-the texturing machine has a multiplicity of processing points, where in each processing point one thread is guided, textured, stretched and wound up. The take-up devices 12 occupy a width of three processing points, thus each three take-up devices 12 are arranged one above the other.

The texturing machine has a machine frame 28 for receiving the processing units. The description of the processing units held on the machine frame 28 is based on the thread run of a thread 2 withdrawn from a document spool 1. As shown in FIG. 4, several feed spools 1 are arranged in a gate frame 3 and assigned to the respective processing stations. In the processing point, the thread 2 through a first delivery mechanism 4 via a first guide roller 29.1 and a second guide roller 29.2 deducted from the supply spool 1. In the thread running direction behind the first delivery mechanism 4 is an elongate heater 5, through which the thread 2 is running, wherein the thread is heated to a certain temperature. In the thread running direction behind the heater 5, a cooling device 9 is provided. The heating device 5 and the cooling device 9 are arranged in a kinked thread course V-shaped to each other and are held on the machine frame 28 above an operating gear 5. The thread 2 thus crosses the operating gear 5 in a V-shaped threadline.

The wetting device 6 is arranged between the heating device 5 and the cooling device 9. The wetting device 6 is constructed in accordance with the embodiment of FIG. 3, so that reference is made here to the preceding description. The cooling roller 7 is arranged at the uppermost point between the heater 5 and the cooling device 9, so that the yarn is additionally deflected when looping the cooling roller 7. Contrary to the previous embodiment of the texturing machine according to FIG. 1, in this case the cooling roller 7 is driven by the cooling roller drive 21 with a direction of rotation counter to the thread run. The cooling roll 7 is disposed within the collection chamber 8, which is coupled to a suction device, so that the incurred in the wetting of the threads of steam can be dissipated directly.

Despite the kinked yarn path within the texturing zone, no additional thread guide elements are needed in this embodiment substantially. The thread tension within the texturing zone can thus be influenced advantageously by the roller drive 21 of the cooling roller 7. Thus, for example, the roller drive of the cooling roller 7 could be connected to a control device which is coupled to a thread tension sensor. Thus, in addition to the wetting of the yarn, a predetermined yarn tension within the texturing zone could be simultaneously controlled by the roll drive 21 of the cooling roll 7.

In the thread running direction below the cooling device 9, the texturing unit 10, a second delivery mechanism 11 and a third delivery mechanism 30 are held on the machine frame 28. In this case, the yarn 2 is guided from the outlet of the cooling device 9, which is preferably formed by a cooling tube, to the texturing unit 10. The texturing unit 10, which may be formed for example by a plurality of overlapping friction disks, is preferably driven by a texturing drive 36, an electric motor.

Below the second delivery mechanism 11, a third delivery mechanism 30 is arranged, which leads in the thread 2 directly in a set heating device 31. The set heater 31 is held on the underside of the machine frame 28 for this purpose. The thread 2 is guided over another fourth delivery mechanism 32 from the set heater 31 and conveyed to the take-up device 12. The third delivery mechanism 30 and the fourth delivery mechanism 32 are driven at a differential speed such that a shrinkage treatment of the thread 2 within the set heater 31 is possible.

The delivery mechanisms 4, 11, 30 and 32 are selected identical in construction in this embodiment, so that the example of the first delivery mechanism 5, these are explained below. Each delivery mechanism is formed by a godet 34 and an overflow roller 35. The godet 34 is driven by a godet drive 33. The overflow roller 35 is freely rotatably mounted, so that the yarn 2 is guided with several wraps on the godet 34 and the overflow roller 35.

The winding device 12 is also characterized schematically in this embodiment by a traversing device 14, a drive roller 13 and a coil 15. The coil 15 is held by means of a coil holder on the circumference of the drive roller 13 for this purpose.

In the preceding embodiments, the cooling roller 7 is driven by a single drive. Since such texturing usually have a plurality of processing stations side by side, it is also possible to drive a cooling roller with a plurality of yarn tracks by a drive, or drive a plurality of processing stations associated cooling rollers by group drives. Likewise, the structures of the illustrated embodiments of the texturing machine according to the invention are exemplary. The number and design of process units before the wetting device and after the wetting device are arbitrary and can be replaced by similar assemblies. Essential here is the intensive precooling by a contact wetting of the thread in the manner according to the invention.

LIST OF REFERENCE NUMBERS

1

supply bobbin

2

thread

3

creel frame

4

First delivery plant

5

heater

6

Wetting device

7

chill roll

8th

plenum

9

cooling device

10

texturing

11

Second delivery mechanism

12

takeup

13

drive roll

14

Traversing device

15

Kitchen sink

16

spool holder

17

groove

18

roll shell

19

hub

20

motor shaft

21

electric motor

22

dip

23

cooling fluid

24

Thread running sensor

25

metering

26

jet

27

Wetting ring

28

machine frame

29.1, 29.2

guide rollers

30

third delivery plant

31

Set heater

32

Fourth delivery plant

33

godet

34

Galette

35

Guide roll

36

Texturierantrieb

Claims (12)

1. Texturing machine for draw texturing at least one yam, with at least one first feed system (4), a heating device (5), a cooling device (9), a texturing unit (10), and a second feed system (11), with a wetting device (6) for wetting the advancing yam (2) being arranged between the heating device (5) and the cooling device (9), characterized in that the wetting device (6) comprises a rotatable cooling cylinder (7), which contains a cooling fluid in a yam track (24) on its circumference, and that the yam (2) can be guided in contact with the yarn track (24) on the circumference of the cooling cylinder (7).
2. Texturing machine of claim 1, characterized in that a drive unit (21) is provided for driving the cooling cylinder (7), with the cooling cylinder (7) being drivable with a direction of rotation in the path of the advancing yarn or with a direction of rotation opposite to the path of the advancing yam.
3. Texturing machine of claim 2, characterized in that the cooling cylinder drive unit is formed by an electric motor (21) which is controllable at a variable rotational speed as a function of the speed of the advancing yarn.
4. Texturing machine of one of claims 1-3, characterized in that the yam track (24) is formed by a groove (17) on the circumference of the cooling cylinder (7), with the groove (17) containing the cooling fluid in the groove bottom.
5. Texturing machine of one of claims 1-4, characterized in that the cooling fluid can be supplied to the yam track on the circumference of the cooling cylinder (7) by a metering device (25).
6. Texturing machine of claim 5, characterized in that the metering device (25) is formed by a dip bath (22) which contains a supply of cooling fluid (23) and into which the circumference of the cooling cylinder (7) immerses in part.
7. Texturing machine of claim 5, characterized in that the metering device (25) is formed by at least one nozzle (26) which is arranged in the interior of the cooling cylinder (7) or outside of the cooling cylinder (7) for supplying the cooling fluid to the yarn track.
8. Texturing machine of one of the foregoing claims, characterized in that the heating device (5), the cooling cylinder (7), and the cooling device (9) are arranged to form a substantially straight yam path.
9. Texturing machine of one of the foregoing claims, characterized in that the heating device (5), the cooling cylinder (7), and the cooling device (9) are arranged to form a bent yarn path, with the yam (2) being deflected by the cooling cylinder (7) between the heating device (5) and the cooling device (9).
10. Texturing machine of claim 8 or 9, characterized in that the first feed system (4) and the heating device (5) are arranged to form a straight yarn path, and/or that the cooling device (9) and the texturing unit (10) are arranged to form a straight yam path.
11. Texturing machine of one of the foregoing claims, characterized in that the cooling cylinder (7) comprises on its circumference a plurality of parallel extending yam tracks (24), with one yam being associated to each yarn track (24).
12. Texturing machine of one of claims 1-11, characterized in that the cooling cylinder (7) is arranged inside a collection chamber (8) which connects to a suction device.

Images