EP2753737B1 - Device for treating a thread - Google Patents

Description

The invention relates to a device for treating a yarn with compressed air according to the preamble of claim 1.

A generic device for treating a yarn with compressed air is from the DE 41 13 962 A1 known.

In the production and further processing of synthetic threads, which are formed from a variety of finest filament strands, it is common to impinge the filament strands within the thread with a stream of compressed air, so that sets a mixing of the filaments to the formation of interlacing nodes in the filaments , The treatment takes place in a swirling device, which has a treatment channel for guiding the thread, in which opening a nozzle opening for introducing the compressed air flow. Depending on the generation of the compressed air flow, the pressure level and the thread guide occur more or less high noise, which lead to a burden on the operating personnel acting in the environment.

For noise reduction, the known device has a housing in which the swirling device is kept encapsulated with respect to the environment. The thread can be fed through a thread inlet and an opposite thread outlet in the housing of the swirling device.

In the known device has now been found that the openings of the thread inlet and the thread outlet caused a respect to the environment considerable noise transmission. So are the thread inlet and the yarn outlet usually in a yarn running plane in which the treatment channel of the swirling device extends. The forwarding of the noise caused by the compressed air and the thread guide occur as airborne sound unhindered out of the housing openings of the thread inlet and the thread outlet.

It is therefore an object of the invention to provide a device for treating a thread in such a way that, if possible, no direct sound transmission through the housing openings of the thread inlet and the thread outlet is made possible without obstructing the threadline.

This object is achieved in that the thread inlet and / or the thread outlet are each formed by two consecutive separate opening slots and a Fadenleitorgan between the opening slots.

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

The invention has the particular advantage that the airborne sound waves caused in the interior by the turbulizer are broken and partly reflected at the yarn inlet and / or the yarn outlet. A direct passage of the airborne sound waves is avoided by a arranged between the separate opening slots Fadenleitorgan.

The opening slots are preferably formed directly in the housing wall, wherein between the opening slots, a recess is provided, in which the Fadenleitorgan is fixed. Thus, the opening slots can be formed independently of the respective Fadenleitorgan with small opening cross-sections, which allows a contactless guidance of the yarn solely by the Fadenleitorgan.

The opening slots may be formed symmetrically or asymmetrically to the Fadenleitorgan.

The development of the invention is particularly advantageous, in which the opening slots and the Fadenleitorgan are offset from one another in such a way that a thread is guided with a Teilumschlingung on the Fadenleitorgan. This allows additional impurities to break and reflect the airborne sound waves within the yarn inlet and / or the Fadenauslasses realize.

In order to obtain the most compact possible arrangement, the development of the invention has proved successful, in which the thread inlet and the yarn outlet associated Fadenleitorgane are assigned directly to the swirling device as a Einlauffadenführer and as an outlet yarn guide. This allows several functions directly through the thread inlet and the thread outlet of the housing realized. The integrated in the housing Fadenleitorgane thus simultaneously form the clamped thread length during the swirling of the thread.

For the handling of the swirling device, the development of the invention has been proven in which the swirling device is cantilevered on a support and in which the housing is open on one side and the swirler hood-shaped surrounds the carrier. This makes it possible to use one-piece housing for encapsulation of the swirling device.

Due to the development of the invention, in which the housing is displaceably guided on the carrier and in which the opening slots and the recess in the housing wall to a wearer facing the front end are open, wherein the carrier arranged on the thread guide member can be inserted into the recess of the housing wall, offers the particular advantage that no complicated threading and docking operations thread at the start of the process. Thus, the Fadenleitorgane can be used already outside of the housing to allow the application of the thread in the swirling device. By opening towards the front opening slots and recesses in the housing wall, the thread can be introduced during the leadership of a Fadenleitorgan automatically by displacement of the housing in the opening slots.

This variant of the invention is particularly combined with the further development, in which two thread guide elements assigned to the thread inlet and the thread outlet of the housing are held on the support.

In order to prevent leakage of compressed air and leakage of the airborne sound waves at the front end of the housing, it is further provided that the end face of the housing on the carrier is assigned a sealing groove for sealing the housing.

The sealing groove advantageously has an inflatable seal, which can be filled with compressed air in an operating position of the housing and can be clamped between the support and the housing. Thus, in addition to the seal at the same time a clamping of the housing is realized on the carrier. A caused by compressed air losses inside the housing unwanted opening is avoided.

To ensure that the swirling device can only be operated when the housing is closed, it is further provided that a contact sensor is arranged on the carrier, which interacts with the housing in the operating position and which is connected to a control device. Thus, for example, the release of compressed air via the control unit can be specified.

To realize a particularly gentle thread guide at the thread inlet and the thread outlet, the development of the invention is preferably used, in which the thread guide member is formed by a deflection roller or a deflection pin. Thus, low-friction thread deflections can be made possible both at the thread inlet and at the thread outlet.

In the treatment of the yarn with a compressed air, it is well known that the swirling device releases a continuous amount of air into the environment via the treatment channel. Thus, the development of the invention is particularly advantageous, in which a suction opening of the swirling device is assigned within the housing, which is connectable to a suction device. This allows a substantially uniform environmental condition to be realized, so that excess air can be continuously removed from the interior of the housing.

In order to improve the sound-insulating effect of the housing, it is provided that the housing has a lining with an insulating material inside.

The inventive device can be advantageously used in particular in the variant in which the swirling device has a driven nozzle ring which has at least one nozzle bore in a circumferential guide groove, which is periodically connectable to a compressed air supply and which cooperates with a stationary cover to form a treatment channel. Such rotationally driven nozzle rings are particularly suitable for producing a high number of entangling knots at relatively high yarn speeds. The occurring noise emissions can be advantageously isolated by the housing relative to the environment.

The device according to the invention will now be explained in more detail below with reference to some embodiments with reference to the accompanying figures.

Fig. 1

schematisch eine Querschnittansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 2

schematisch eine Seitenansicht des Ausführungsbeispiels aus Fig. 1

Fig. 3

schematisch eine Querschnittansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 4

schematisch eine Längsschnittansicht des Ausführungsbeispiels aus Fig. 3

Fig. 5

schematisch eine Seitenansicht des Ausführungsbeispiels in Fig. 3 in Betriebsstellung

Fig. 6

schematisch eine Seitenansicht des Ausführungsbeispiels aus Fig. 3 in einer Anlegestellung

They show:

Fig. 1

schematically a cross-sectional view of a first embodiment of the device according to the invention

Fig. 2

schematically a side view of the embodiment of Fig. 1

Fig. 3

schematically a cross-sectional view of another embodiment of the device according to the invention

Fig. 4

schematically a longitudinal sectional view of the embodiment of Fig. 3

Fig. 5

schematically a side view of the embodiment in Fig. 3 in operating position

Fig. 6

schematically a side view of the embodiment of Fig. 3 in a landing position

In the Fig. 1 and 2 a first embodiment of the device according to the invention for treating a yarn with compressed air is shown. In Fig. 1 is a cross-sectional view and in Fig. 2 a side view of the embodiment shown. The following description, insofar as there is no explicit reference to one of the figures, applies to both figures.

The embodiment consists of a housing 2, which has a turbulizer 1 inside. The housing 2 is formed from two housing halves 10.1 and 10.2 which are held sealingly on one another and which, in their parting line, form a thread inlet 3 and a thread outlet 4 opposite one another.

Within the housing 2, the swirling device 1 is arranged, which is formed in this embodiment by a nozzle plate 6 and a baffle plate 7, which form a treatment channel 11 between them. The treatment channel 11 is open at the ends of the baffle plate 7 and the nozzle plate 6 and lies with the thread inlet 3 and the thread outlet 4 in a thread running plane. For better understanding, this is in Fig. 1 the yarn path of a thread 12 located.

As from the illustration in Fig. 1 shows a nozzle channel 8 opens into the treatment channel 11. The nozzle channel 8 is coupled at the bottom of the nozzle plate 6 with a compressed air connection 9, which is formed on the lower half of the housing 10.1. The nozzle plate 6 is fixedly connected to the housing half 10.1 and the baffle plate 7 fixed to the upper half of the housing 10.2.

As from the illustration in Fig. 1 it can be seen, the thread inlet 3 and the thread outlet 4 is identical in this embodiment. Thus, the thread inlet 3 is formed by two in the housing wall 2.1 successive opening slots 3.1 and 3.2. The opening slots 3.1 and 3.2 include a recess 3.3 between them. The opening slot 3.1 forms the connection to the external environment. The opening slot 3.2 opens into the interior of the housing 2 and represents the connection between the recess 3.3 and the housing interior.

Within the recess 3.3 a Fadenleitorgan 5.1 is arranged and extends with a free end in such a way in the recess 3.3 that an imaginary between the opening slots 3.1 and 3.2 connecting line is interrupted by the Fadenleitorgan 5.1. In that regard, no view through the housing wall 2.1 from outside to inside is possible.

On the opposite side of the turbulizer 1 is in the housing 2 of the thread outlet 4 through the opening slots 4.1 and 4.2 formed, which open within the Gehäusewand 2.1 in a central recess 4.3. Within the recess 4.3, a further thread guide 5.2 is arranged, which projects with such a free end in the recess 4.3 that no straight thread guide between the opening slots 4.1 and 4.2 is possible. The opening slots 4.1 and 4.2 are formed symmetrically to the recess 4.3.

At the in Fig. 1 and 2 illustrated embodiment, the thread inlet 3 and the thread outlet 4 is formed in the parting line between the housing halves 10.1 and 10.2. Thus, the recesses are 3.3 and 4.3 by groove-shaped cuts in the housing walls of the housing halves 10.1 and 10.2 executable, wherein the Fadenleitorgane 5.1 and 5.2 are attached to the upper half of the housing 10.2 within the recesses 3.3 and 4.3 and in the closed state of the housing 2 in the opposite half protrude the recesses 3.3 and 4.3. Thus, in the open state of the housing 2, a thread 12 can be applied directly to the swirling device. By closing the housing 2, the thread 12 is automatically guided via the thread guide elements 5.1 and 5.2 into a desired guide position for the treatment of the thread. This situation is in Fig. 1 shown.

In operation, compressed air is supplied to the nozzle channel 8 via the compressed air connection 9, which is directed as a stream of compressed air via the nozzle channel 8 into the treatment channel 11 onto the thread 12. The Fadenleitorgane 5.1 and 5.2 thereby form a required for the swirling clamped thread length and thus act as Einlauffadenführer and Auslassfadenführer the swirling. 1

The noise generated during operation of the yarn during the treatment of the yarn by the swirling device in the interior of the housing 2 spreads in the interior of the housing by sound waves, which are transmitted as structure-borne noise and airborne noise in the environment. Of the Structure-borne sound of the plates 6 and 7 in the interior of the housing 2 is usually attenuated by appropriate insulating materials to the inner region of the housing 2. The direct airborne sound transmission from the housing interior to the environment is significantly attenuated by the inventive design of the thread inlet 3 and the thread outlet 4. Thus, the sound waves are reflected and broken by the respectively held between the opening slots 3.1 and 3.2 and 4.1 and 4.2 Fadenleitorgane 5.1 and 5.2. Thus, the airborne sound transmission to the external environment is significantly reduced. The Fadenleitorgane 5.1 and 5.2 may be formed in this embodiment by plates having a ceramic guide on a yarn guide edge and having their side edges insulating materials. Thus, the sound waves can be advantageously damped by the Fadenleitorgane 5.1 and 5.2.

In the Fig. 3 to 6 a further embodiment of the device according to the invention for treating a yarn with compressed air is shown. The Fig. 3 represents the embodiment in a cross-sectional view and the Fig. 4 in a longitudinal sectional view. In the Fig. 5 and 6 the embodiment is shown in a side view with closed and open housing.

Unless expressly made to any of the figures, the following description applies to all figures.

The exemplary embodiment has a swirling device 1 which cantilevers on a chain-shaped support 13 and is cup-shapedly enveloped by a cylindrical housing 2. The housing 2 is for this purpose guided over two guide rods 25.1 and 25.2 by two guide openings 38.1 and 38.2 to the carrier 13 slidably. The guide rods 25.1 and 25.2 are attached to the housing 2 and penetrate with their free end the guide openings 38.1 and 38.2. For manual guidance of the housing 2 is on the outside of the housing 2 a Handle 26 is arranged so that the housing 2 by an operator between a landing position and an operating position on the carrier 13 is reciprocatable. In Fig. 5 is the housing 1 in the operating position and in Fig. 6 shown in the landing position.

As in particular from the representations in Fig. 3 and 4 shows, the swirling device 1 is formed in this embodiment by a rotationally driven nozzle ring 15 which is guided on a stator 14. The stator 14 is fixed to the carrier 13 and has a central bearing bore 20 in which a drive shaft 17 is mounted. The drive shaft 17 is coupled with a free end to the nozzle ring 15, which is guided cup-shaped on the stator 14. The opposite end of the drive shaft 17 is coupled to a drive 18.

The nozzle ring 15 has a circumferential guide groove 16 in which open several radially aligned nozzle channels 8. The nozzle channels 8 penetrate the nozzle ring 15 and are alternately connected upon rotation of the nozzle ring 15 with a chamber opening 22 formed on the stator 14. The chamber opening 22 opens into a pressure chamber 21 within the stator 14. The pressure chamber 21 is coupled via a compressed air connection 23 with a compressed air source 33.

The chamber opening 22 on the stator 14 is assigned to the carrier 13, a cover 19 which covers the guide groove 16 of the nozzle ring 15 and together with the nozzle ring 15 form a treatment channel 11.

As in particular from the Fig. 3 As can be seen, the swirling device 1 for thread guidance is associated with two deflecting pins 35.1 and 35.2, which are held cantilevered on the carrier 13. In this case, the deflecting pins 35.1 and 35.2 protrude into two recesses 39.1 and 39.2 of the housing wall 2.1. The cuts 39.1 and 39.2 are open Front end 24 of the housing 2 opposite in the housing wall 2.1 introduced.

The notches 39.1 and 39.2 are designed like a profile in the housing wall 2.1 and form a thread inlet 3 and an opposite thread outlet 4 in the housing wall 2.1. The thread inlet 3 is determined by the cross section of the notch 39.1 and has a central recess 3.3 and two in the recess 3.3 opening slots 3.1 and 3.2 opening. Likewise, the yarn outlet 4 is formed by the cross section of the notch 39.2 with a recess 4.3 and two laterally opening into the recess 4.3 opening slots 4.1 and 4.2. The recesses 3.3 and 4.3 form the receptacles for the deflecting pins 35.1 and 35.2. In this case, the deflecting pins 35.1 and 35.2 project into the recesses 3.3 and 4.3 in such a way that the connection between the opening slots 3.1 and 3.2 and the opening slots 4.1 and 4.2 is interrupted.

As in particular from the illustration in Fig. 4 shows, the carrier 13 for receiving the housing 2, a circumferential sealing groove 27, in which the stepped front end 24 of the housing 2 protrudes. The sealing groove 27 is associated with a circumferential seal 28 which is connectable via a compressed air channel 29 with a compressed air source 33. The seal 28 is inflatable during operation, so that the seal 28 braced between an inner edge of the housing wall 2.1 and the carrier 13.

The open front end 24 of the housing 2 is assigned to the carrier 13, a contact sensor 32 which is coupled to a control unit 31. The control unit 31 is coupled via control lines to a control valve 30 and the drive 18. The contact sensor 32, which could be, for example, a contact switch, senses the position of the housing 2, see FIG that only in the operating position of the housing 2, an activation of the compressed air source 33 and the drive 18 is possible.

Furthermore, a suction opening 36 is formed on the support 13, which opens into the interior of the housing 2 and is connected to a suction device. In this case, the suction device is formed by a suction fan 37, which generates a continuous suction flow for the removal of superfluous air during operation of the device.

At the in Fig. 3 to 6 illustrated embodiment of the device according to the invention, the swirling device 1 is first led to the application of a thread, the housing 2 in a landing position, as in Fig. 6 is shown. The thread is threaded into the treatment channel 11 of the swirling device 1 and deflected over the laterally guided deflection pins 35.1 and 35.2. The deflecting pins 35.1 and 35.2 thus form the inlet yarn guide and the outlet yarn guide in order to obtain a defined looping of the yarn on the circumference of the guide groove 16 of the nozzle ring 15. This situation is particular in the Fig. 3 shown.

Once the application process is completed, the housing 2 is moved to the operating position. This situation is in Fig. 5 shown. Upon reaching the operating position of the housing 2, the control unit 31 is signaled via the contact sensor 32 that the device is ready for operation. The controller 31 generates control signals to connect the compressed air source 33 via the control valve 30 with the seal 28 and the pressure chamber 21. At the same time, the drive 18 could be controlled via the control unit 31 in order, for example, to convert the rotation of the nozzle ring 15 from an application speed into an operating speed.

When moving the housing 2 from the landing position in the operating position of the thread with the deflecting pins 35.1 and 35.2 in the incisions 39.1 and 39.2 of the housing wall 1 out. Thus, the yarn path at the yarn inlet 3 and at the yarn outlet 4 of the housing 2 automatically turns on.

As in particular from the illustration in Fig. 3 shows that the transmission of airborne sound from the interior of the housing 2 in the environment through the respective offset opening slots 3.1 and 3.2 and 4.1 and 4.2 in the housing wall 2.1 is not possible. The sound waves can be deflected by the deflection pins 35.1 and 35.2 in the respective free space of the recesses 3.3 and 4.3 out.

This in Fig. 3 to 6 illustrated embodiment can be advantageously extended such that the housing 2 has a sheath inside, which consists of an insulating material to absorb the airborne sound within the housing. Thus, both the bottom of the housing 2 and the encircling housing wall in the interior can be lined by one or more layers of insulating material.

A further alternative to the thread guide can be carried out in particular by the deflection pins 35.1 and 35.2 are replaced by pulleys. Such deflection rollers have the advantage that a thread-gentle low-friction guidance of the thread 12 during the Verwirbelungsbehandlung is possible.

This in Fig. 3 to 6 illustrated embodiment is thus particularly suitable to treat a thread with pulsed compressed air streams. the production by means of a nozzle ring, which can be operated at yarn running speed, also allows the treatment of yarns in processes in which the yarn is guided at high yarn speeds.

LIST OF REFERENCE NUMBERS

1

swirling

2

casing

2.1

housing wall

3

inlet thread

3.1, 3.2

opening slot

3.3

recess

4

thread outlet

4.1, 4.2

opening slot

4.3

recess

5.1, 5.2

thread guide

6

nozzle plate

7

flapper

8th

nozzle channel

9

Compressed air connection

10.1, 10.2

housing halves

11

treatment channel

12

thread

13

carrier

14

stator

15

nozzle ring

16

guide

17

drive shaft

18

drive

19

cover

20

bearing bore

21

pressure chamber

22

chamber opening

23

Compressed air connection

24

open front end

25.1, 25.2

guide rods

26

handle

27

seal groove

28

poetry

29

Compressed air duct

30

control valve

31

control unit

32

Contact sensor

33

Compressed air source

35.1, 35.2

deflection pin

36

suction opening

37

aspirator

38.1, 38.2

guide opening

39.1, 39.2

incision

Claims (14)

1. Apparatus for treatment of a thread with compressed air, having a turbulence device (1) and having a housing (2) that encapsulates the turbulence device (1) with regard to the surroundings and that has a thread inlet (3) and an opposite thread outlet (4),
   characterized in that
   the thread inlet (3) and/or the thread outlet (4) are formed, in each instance, by means of two consecutive, separate opening slots (3.1, 3.2, 4.1, 4.2) and a thread guide element (5.1, 5.2) between the opening slots (3.1, 3.2, 4.1, 4.2).
2. Apparatus according to claim 1,
   characterized in that
   the opening slots (3.1, 3.2) are configured in a housing wall (2.1) that has a recess (3.3) between the opening slots (3.1, 3.2), into which recess the thread guide element (5.1) projects.
3. Apparatus according to claim 1 or 2,
   characterized in that
   the opening slots (3.1, 3.2) and the thread guide element (5.1) are disposed offset from one another, in such a manner that a thread (12) is guided on the thread guide element (5.1) with a partial loop.
4. Apparatus according to one of claims 1 to 3,
   characterized in that
   the thread guide elements (5.1, 5.2) assigned to the thread inlet (3) and/or the thread outlet (4) are directly assigned to the turbulence device (1), as an incoming thread guide and/or as an outgoing thread guide.
5. Apparatus according to one of claims 1 to 4,
   characterized in that
   the turbulence device (1) is disposed on a support (13), projecting from it, and that the housing (2) is open on one side and encloses the turbulence device (1) on the support (13), in the manner of a hood.
6. Apparatus according to claim 5,
   characterized in that
   the housing (2) is guided on the support (13) in displaceable manner, and that the opening slots (3.1, 3.2) and the recess (3.3) in the housing wall (2.1) are open toward a face end (24) that faces the support (13), where the thread guide element (35.1) disposed on the support (13) can be inserted into the recess (33) of the housing wall.
7. Apparatus according to claim 6,
   characterized in that
   two thread guide elements (35.1, 35.2) assigned to the thread inlet (3) and the thread outlet (4) of the housing (2) are held on the support (13).
8. Apparatus according to one of claims 5 to 7,
   characterized in that
   a sealing groove (27) for sealing the housing (2) is assigned to the face end (24) of the housing (2), on the support (13).
9. Apparatus according to claim 8,
   characterized in that
   the sealing groove (27) has an inflatable seal (28) that can be filled with compressed air in an operating position of the housing (2) and can be braced between the support (13) and the housing (2).
10. Apparatus according to one of claims 5 to 9,
    characterized in that
    a contact sensor (32) is disposed on the support (13), which sensor interacts with the housing (2) in the operating position and is connected with the control device (31).
11. Apparatus according to one of claims 1 to 10,
    characterized in that
    the thread guide element (5.1) is formed by a deflection roller or a deflection pin (35.1).
12. Apparatus according to one of claims 1 to 11,
    characterized in that
    a suction opening (36) is assigned to the turbulence device (1) within the housing (2), which opening can be connected with a suction device (37).
13. Apparatus according to one of claims 1 to 12,
    characterized in that
    the housing (2) has a lining of an insulation material on the inside.
14. Apparatus according to one of claims 1 to 13,
    characterized in that
    the turbulence device (1) has a driven nozzle ring (15) that has at least one nozzle channel (8) in a circumferential guide groove (16), which channel can be periodically connected with a compressed air feed (21, 22) and interacts with a stationary cover (19) to form a treatment channel (11).

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