EP1114212B1 - Texturing machine - Google Patents

Description

The invention relates to a texturing machine according to the preamble of claim 1.

The texturing machine is out of the DE 31 21 959 known.

When texturing is a substantially smooth thread a more textile appearance and the associated properties are abandoned. The plain yarn supplied to the texturing machine is twisted for this purpose in the texturing machine by a texturing unit. This false twist is then fixed within a false twist zone in the thread, in which the twisted thread is heated in a heating device. Following the heat treatment, the thread must be cooled by a cooling device again. In the known texturing machine for this purpose, the thread is guided helically on the outer surface of a cooling tube. The cooling tube is internally cooled by a cooling medium. Due to the helical course of the thread, on the one hand, a stable yarn path in the texturing zone and, on the other hand, an improved heat transfer between yarn and cooler can be achieved.

With texturing machines of this type, heating devices are usually used today which have a heating temperature which is above the melting temperature of the thread material. These so-called high-temperature heaters make it possible to keep the texturing zone relatively short despite high yarn speeds of up to 1,200 m / min. In addition to the intensive heating of the thread, it is thus necessary that a coordinated on the heating of the thread intensive cooling is carried out by the cooling device.

In the known texturing machine from the EP 0 744 481 It is therefore proposed to subdivide the cooling device into two zones. In a first Zone are introduced a plurality of openings in the jacket of a cooling tube. This ensures that the guided on the outer circumference of the cooling tube thread comes into direct contact with a cooling medium. However, this arrangement has the disadvantage that thereby an increased proportion of volatile components is released from the thread, which can be absorbed and removed only by an additional suction device. Furthermore, such a direct loading of the thread with the cooling medium on the cooling tube leads to a troubled threadline even in the second zone, in which the thread is guided on the outer surface of the cooling tube.

FR-A-2 380 363 discloses a device for heat treating a thread with a countercurrent cooling.

Accordingly, it is an object of the invention to develop a Texuriermaschine of the type mentioned in such a way that a thread even at high yarn speeds and high temperature load in the heater as far as possible in a short way is intensively coolable.

A further object of the invention is to provide a texturing machine with a cooling device in which a plurality of cooling tubes arranged parallel to one another can be supplied in a simple manner by a coolant source.

This object is achieved by the features of claim 1.

The particular advantage of the invention is that the cooling effect of the cooling tube is intensified towards the end of the out. This avoids shock-like cooling of the thread when the thread creeps onto the cooling tube. Since the cooling medium flowing from the outlet end to the outlet end is already heated by the continuous heat exchange between the outer surface and the cooling medium, the leading end of the cooling tube is cooled less by the cooling medium than the outflow end of the cooling tube. Another advantage is that the thread leaving the cooling device a having uniform temperature, since the outer surface of the cooling tube has a certain temperature determined by the supplied cooling medium in the outlet end. By flowing against the thread running direction cooling medium is achieved that the guided on the outer surface of the thread encounters a constantly cooler surface and thus is cooled more effectively, which is particularly advantageous for fixing the crimp in the thread.

It is also advantageous that the cooling tube is connected at only one end to the cooling medium source. The opposite end of the cooling tube has no connections, so that the length of the texturing are essentially dependent on the functional lengths of the heater and the cooling tube. The outer tube forms the outer surface for guiding the thread. By arranged in the interior of the outer tube inner tube, a cooling medium is introduced into the outer tube. The cooling medium enters through a passage in the region of the outlet end in the cooling chamber and flows through the cooling chamber to the end of the cooling tube. In this case, the outer surface of the outer tube is cooled.

In order to obtain a uniform cooling of the outer surface of the outer tube, the texturing machine according to the invention is preferably designed according to claim 3. At this time, the outer surface is uniformly cooled on the entire circumference by the cooling medium in the cooling chamber.

The development of the texturing machine according to claim 4 is particularly characterized by the fact that the heat is dissipated by the outer tube quickly and also takes place an intensive cooling of the outer surface.

The free flow cross section of the inner tube is preferably at least twice as large as the free flow cross section of the cooling chamber.

Due to the particularly advantageous development of the texturing machine according to claim 6, a closed cooling medium circuit can be produced, wherein all connections are attached to one end of the cooling tube.

In a particularly preferred embodiment of the texturing machine, a cooling air is used as the cooling medium. The cooling medium source is formed by a fan. Since the cooling medium has a temperature in the range of 10 to 40 ° C, in such an embodiment of the invention preferably the ambient air is to be used directly as a cooling medium. The cooling device is characterized in this case by its simple yet very effective structure.

In the cases in which the Texutiermaschine is operated in an environment having higher air temperatures, the invention according Texutiermaschine according to claim 7 run. In this case, an air conditioner is used directly as a cooling medium source and connected to the cooling tube.

When using a cooling air, the cooling device of the texturing machine is preferably guided in an open cooling circuit. For this purpose, the texturing machine according to the invention is designed according to claim 9. The heated cooling air is discharged in this case via the outlet opening of the outer tube directly into the environment.

In order to change the contact length and thus the intensity of the heat transfer between the thread and the outer surface of the cooling tube, the texturing machine according to the invention is preferably designed with the features of claim 10. By adjusting the Einlauffadenführers or the Auslauffadenführers an increase or decrease of the wraps can be generated on the cooling tube. To intensify the cooling, the looping of the thread on the cooling tube is increased. This is the contact pressure of the thread increases, so that a more intense cooling of the thread occurs. As a result of this development, it is possible to achieve a fine adjustment of the thread temperature at the outlet end.

To achieve a uniform good crimping quality, the cooling tube with the heating device and with the first delivery mechanism is arranged in a plane in front of the texturing unit. Thus, no additional deflection of the thread is made in the swirl zone, which hinder a return of the false twist in the thread to the heater avoided.

When using several cooling tubes in parallel side by side, the development of the invention according to claim 12 is particularly advantageous. In this case, a plurality of juxtaposed cooling tubes can be supplied simultaneously by a cooling medium source. For this purpose, a collecting container is arranged between the cooling tube and the cooling medium source. From the collecting the cooling medium passes with the same pressure in the cooling pipes connected to the reservoir. This system is therefore particularly preferably used in an open cooling circuit.

In the following figures, some embodiments of the invention are shown with reference to the accompanying drawings.

Fig. 1

eine schematische Ansicht einer erfindungsgemäßen Texturiermaschine;

Fig. 2

schematisch einen Querschnitt einer Kühleinrichtung der Texturiermaschine aus Fig. 1;

Fig. 3

ein weiteres Ausführungsbeispiel einer Kühleinrichtung.

They show:

Fig. 1

a schematic view of a texturing machine according to the invention;

Fig. 2

schematically a cross section of a cooling device of the texturing machine of Fig. 1;

Fig. 3

another embodiment of a cooling device.

In Fig. 1 is a schematic view of a texturing machine according to the invention is shown. The texturing machine consists of a gate frame 2, a process frame 3 and a winding frame. 1

Between the process frame 3 and the winding frame 1 an operating gear 5 is formed. On the opposite side to the operating gear of the winding frame 1, the gate frame 2 is arranged at a distance from the winding frame 1. Between the winding frame 1 and the gate frame 2 thus a Doffgang 6 is formed.

The texturing machine has in the longitudinal direction - in FIG. 1, the plane of the drawing is equal to the transverse plane - a plurality of processing points for one thread per processing point. The take-up devices occupy a width of three processing points. Therefore, three rewinders 9 - will be discussed later - arranged in a column one above the other in the winding frame 1. Each processing point has a feed bobbin 7, on which a thermoplastic thread 4 is wound. The thread 4 is withdrawn via a head thread guide 12 and a guide roller 11 under a certain tension by the first delivery mechanism 13. In the embodiment of FIG. 1, the thread between the gate frame 2 and the delivery mechanism 13 is guided without pipe guide. However, in this case, pipe guides can be used.

In the thread running direction behind the first delivery mechanism 13 is a heating device 18, through which the thread 4 runs, wherein the thread is heated to a certain temperature. The heater is designed as a high temperature heater in which the heating surface temperature is above 300 ° C. Such a heater is for example from the EP 0 412 429 (Bag 1720) known. In that regard, reference is made to this document. Behind the heater 18 is a cooling device 19. The delivery mechanism 13, the heater 18 and the cooling device 19 are in one Layer arranged one behind the other in such a way that sets a substantially straight threadline.

The cooling device 19 has a cooling tube 16, on the outer surface of the thread 4 is guided helically. This cooling pipe 16, whose description will be discussed later, is connected via a line 15 to a cooling medium source 14. The cooling medium source 14 conveys a cooling medium into the interior of the cooling tube 16, so that the outer surface of the cooling tube 16 is cooled continuously.

In the yarn path in front of the cooling device 19 is an inlet yarn guide 37 and in the direction of yarn travel behind the cooling device a discharge yarn guide 38 is provided. The inlet yarn guide or the outlet yarn guide are preferably adjustable transversely to the yarn running direction to change the feed point of the yarn on the outer surface of the cooling tube 16 or the drain point of the yarn on the cooling tube 16, so that the yarn is guided with more or less looping on the cooling pipe 16 ,

Behind the cooling device 19 is a texturing unit 20. This texturing unit 20 can be designed, for example, as a friction unit with rotating friction disks arranged on three shafts. Here, the thread is guided and twisted by the gusset formed by the friction discs.

Subsequent to the texturing unit 20, a second delivery mechanism 21 serves to pull the yarn 4 both via the heating device 18 and via the cooling device 19.

In the event that an aftertreatment of the textured thread is required, the texturing machine has a set heater 22 in the thread running direction behind the second delivery mechanism 21. This set heater 22 can be used as a curved heating tube be formed, which is surrounded by a heating jacket, wherein the heating tube is heated from the outside with steam to a certain temperature. The set heater 22, like the first heater, could also be designed as a high-temperature heater.

The second heater 22, a further third delivery mechanism 23 is arranged downstream. Before or behind is a preparation device (not shown here), which prepares the thread 4 before entering a reel 9. In the winding device 9, the thread is wound onto a spool 25, which is driven by a friction roller 24 on the circumference. Before the friction roller 24 is a traversing device 26, by means of which the thread 4 back and forth on the coil 25 and wound on this as a cross winding.

An operation 5 is formed between the process frame 3 and the winding frame 1. The thread 4 is guided below a platform 27 through the operating passage 5. Above the operating passage 5, the cooling device 19 is arranged, which is supported substantially on the process frame 3. In the process rack according to the yarn path, the Textrieraggregat 20, the second delivery mechanism 21 and the set heater 22 are arranged.

On the winding frame 1, the first delivery mechanism 13 is arranged directly in front of the entrance of the heating device 18 in the upper region on the side remote from the operating passage. The heating device 18 in turn is supported on the winding frame 1. According to the yarn path, the third delivery mechanism 23 is fixed in the winding frame 1 at the lower end of the winding frame 1. Moreover, the winding devices 9 are arranged in the winding frame 1.

The winding device 9 has a bobbin 8, which serves to accommodate the full bobbin when a full take-up reel 25 has been generated on the winding device. To remove the full bobbin 25, the spindle carrier is pivoted and the full bobbin is deposited on a rolling track. The Rolling conveyor is part of the coil storage 8. On the rolling conveyor the full coil 25 waits until it is transported away. Therefore, the rolling track of the bobbin 8 is disposed on the side of the winding frame 1, which is adjacent to the Doffgang 6 and 6 away from the operation gear. Furthermore, each winding device 9 is associated with a sleeve feeding device 10, which is no longer described in detail.

In this case, the thread 4 is drawn off from a supply spool 7 by means of the first delivery mechanism 13 and guided into a swirl zone. The swirl zone here consists of the heating device 18, the cooling device 19 and the texturing unit 20. Within the swirl zone, a stretching and fixing of the thread 4 takes place. The thread 4 is withdrawn from the swirl zone by the second delivery mechanism 21 and subsequently with the aid of a third delivery mechanism 23 promoted under shrink condition by a set heater 22. After the third delivery mechanism 23, the thread 4 is guided to the take-up device 9 and wound into a coil 25.

FIG. 2 schematically shows a cross section of the cooling device 19, as used in the texturing machine in FIG. The cooling device 19 has a cooling tube 16. The cooling tube 16 has a run-up end 29 and an outflow end 30. The thread 4 runs at the outlet end 29 on the cooling tube 16 and wraps around the cooling tube 16 helically. At the end of the drain 30, the thread 4 leaves the surface of the cooling tube 16 and continues to the texturing unit. Before the outflow end 29, an inlet yarn guide 37 is arranged. The Einlauffadenführer 37 is formed transversely to the yarn running direction in the circumferential direction of the cooling tube pivotable. On the opposite side of the cooling tube 16, an outlet yarn guide 38 is provided, which is also pivotable transversely to the yarn running direction. By adjusting the Einlauffadenführers and / or the outlet yarn guide 38, the Fadenumschlingung can be changed to the cooling tube, for example, to obtain a more intense cooling.

The cooling tube 16 is formed of an outer tube 31 and an inner tube 32. On the outer surface of the outer tube 31, the thread 4 is guided. Inside the outer tube 31, the inner tube 32 is arranged substantially concentrically with the outer tube. Between the inner tube 32 and the outer tube 31, an annular cooling chamber 33 is formed. The cooling chamber 33 extends from the discharge end 30 to the leading end 29 of the outer tube. The outer tube 31 is closed at the outlet end 30 frontally. At the closed end side of the outer tube 31, the inner tube 32 is attached with one end. At the opposite end of the inner tube 32, an inlet port 35 is provided on the end face of the inner tube 32. At this inlet opening 35, a cooling medium source 14 is connected to the inner tube 31 via a line 15. The inner tube has in the region of the outlet end 30 has a passage 34, which is formed for example by a plurality of openings in the jacket of the inner tube 32. Via the passage 34, the interior of the inner tube 32 is connected to the cooling chamber 33.

The outer tube 31 is open at the end face of the run-up end 29 and forms an outlet opening 36.

In the embodiment of the cooling device shown in Fig. 2, the cooling medium source 14 is formed as a fan. In this case, a cooling air is conveyed through the conduit 15 into the interior of the inner tube 32 by the blower 14. The cooling air passes from the inner tube 32 through the passage 34 in the cooling chamber 33. In the cooling chamber 33, the cooling air flows counter to the thread running direction from the discharge end 30 of the cooling tube to the leading end 29 of the cooling tube. At the outlet end 29, the cooling air is discharged through the outlet opening 36 of the outer tube 31 into the environment. In order to obtain the highest possible flow velocity in the cooling chamber 33 counter to the thread running direction, the free flow cross section of the cooling chamber 33 is smaller than the free flow cross section of the inner tube 32.

The embodiment of the cooling device 19 shown in FIG. 2 is designed with an open cooling circuit. However, it is also possible to collect the warm exhaust air and to conduct to the outside or to perform the cooling device with a closed cooling circuit. For this purpose, the outlet opening 36 is connected by way of example to a cooling medium preparation. From the cooling medium preparation, the regenerated cooling medium can be conveyed again directly from the cooling medium source 14 into the inner tube 32. In such an arrangement, liquid cooling media can be used without problems. In the event that the warm air is removed, the outlet opening 36 would be connected, for example, to a manifold. Through the manifold the exhaust air is then led outside the air-conditioned room.

FIG. 3 shows a further exemplary embodiment of a cooling device, as could be used, for example, in a texturing machine according to FIG. Here, in one view, the threadline is shown in three adjacent processing points of a texturing machine. The threads 4.1, 4.2 and 4.3 are guided in parallel over the cooling pipes 16.1, 16.2 and 16.3. The cooling tubes 16.1, 16.2 and 16.3 are connected via the lines 15.1, 15.2 and 15.3 each to a collecting container 39. The collecting container 39 is connected to an air conditioning system 40.

In this arrangement, cooling air introduced into the sump 39 from the air conditioner 40 is passed through the conduits 15 to the individual cooling tubes 16. For this purpose, for example, the cooling tubes 16 can also be formed from an outer tube and an inner tube, as described above with reference to FIG. 2, so that the heated cooling air can subsequently be released into the environment.

In the texturing machine according to the invention is thus ensured that the yarn is cooled intensively after leaving the heater, in particular a high-temperature heater without a strong shock-like cooling occurs upon entering the cooling device.

Another advantage lies in the particularly compact swirl zone, since the cooling tube has only one-sided connections for connection to a cooling medium source.

LIST OF REFERENCE NUMBERS

1

winding frame

2

creel frame

3

process frame

4

thread

5

service aisle

6

doffing aisle

7

supply bobbin

8th

coil storage

9

takeup

10

Sleeve feeder

11

idler pulley

12

Yarn guide

13

First delivery plant

14

Source of coolant

15

management

16

cooling pipe

18

heater

19

cooling device

20

texturing

21

Second delivery mechanism

22

Set heater

23

Third delivery plant

24

friction roller

25

Kitchen sink

26

Traversing device

27

platform

28

thread guides

29

accrual of

30

expiring

31

outer tube

32

inner tube

33

cooling chamber

34

Passage

35

inlet port

36

outlet

37

Inlet yarn guide

38

Outlet yarn guide

39

Clippings

40

air conditioning

Claims (11)

1. Texturing machine for texturing a plurality of thermoplastic yarns (4), each in a processing station, which comprises a feed yarn package (7), a first feed system (13), a heating device (18), a cooling device (19), a texturing unit (20), a second feed system (21), as well as a takeup device (9), the cooling device (19) comprising a cooling tube (16), which connects to a source of coolant (14) and is cooled from the inside by a coolant, and on the outer surface of which at least one of the yarns (4) spirally advances from a contact end (29) of the cooling tube to a takeoff end (30) of the cooling tube (16), whereby the cooling tube (16) connects to the source of coolant (14) in such a manner that the outer surface of the cooling tube (16) is cooled by a coolant flowing from the takeoff end (30) of the cooling tube (16) in direction toward the contact end (29) of the cooling tube (16), characterized in that the cooling tube (16) comprises an outer tube (31) contacted by the yarn and an inner tube (32) arranged inside the outer tube (31), that the outer tube (31) is closed on its front side at the takeoff end (30), that a cooling chamber (33) is formed between the inner tube (32) and the outer tube (31), that the inner tube (32) comprises a passageway (34) to the cooling chamber (33) in the region of the takeoff end (30), and that the inner tube (32) connects to the source of coolant (14) in the region of the contact end (29).
2. Texturing machine of claim 1, characterized in that the cooling chamber (33) extends in the interior of the outer tube (31) substantially over the length and the circumference of the outer tube (31).
3. Texturing machine of claim 1 or 2, characterized in that the inner tube (32) has a free flow cross section, which is greater than the free flow cross section of the cooling chamber (33).
4. Texturing machine of claim 3, characterized in that the flow cross section of the inner tube (32) is at least twice as large as the flow cross section of the cooling chamber (33).
5. Texturing machine of one of claims 1-4, characterized in that the outer tube (31) comprises at the contact end (29) an outlet opening (36), which connects to the cooling chamber (33), and through which the coolant is removed from the cooling chamber (33).
6. Texturing machine of one of claims 1-5, characterized in that the coolant is a cooling air, and that the source of coolant (14) is designed and constructed as a blower.
7. Texturing machine of one of claims 1-5, characterized in that the coolant is a cooling air, and that the source of coolant (14) is formed by an air-conditioning system.
8. Texturing machine of claim 6 or 7, characterized in that the outlet opening (36) of the outer tube (31) connects to the surroundings, so that the heated cooling air is able to flow off into the surroundings.
9. Texturing machine of one of claims 1-8, characterized in that in the region of the contact end (29) of the cooling tube (16) an inlet yarn guide (37) is arranged and an outlet yarn guide (38) in the region of the takeoff end (30) of the cooling tube (16), and that the inlet yarn guide (37) and/or the outlet yarn guide (38) are/is adjustable in the circumferential direction of the cooling tube (16).
10. Texturing machine of one of claims 1-9, characterized in that the cooling tube (16) with the heater (18) and with the first feed system (13) are arranged in one plane upstream of the texturing unit (20).
11. Texturing machine of one of the foregoing claims, characterized in that a collection tank (39) is arranged between the cooling tube (16) and the source of coolant (14), and that the collection tank (39) connects to a plurality of cooling tubes (16.1, 16.2, 16.3) of a plurality of processing stations.

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