EP1144295B1 - Method for continuously unwinding a thread - Google Patents

Abstract

A thread (1) is unwound from a supply bobbin (2). The end (6) of the thread of the supply bobbin (2) is joined to the start (7) of the thread of a reserve bobbin (3) by a knot-type joint (5), in order to ensure that the line is continuous for working or processing. A sensor (4) is provided and detects the passing over of the thread from the supply bobbin (2) to the reserve bobbin (3) after the supply bobbin (2) has run out and indicates this accordingly.

Description

The invention relates to a method and a device for continuous Removing a thread from a supply spool and a method and a Texturing machine for texturing a synthetic multifilament yarn.

The method and the device for removing a thread are known and are used in textile machines in which a supplied thread or is processed. Here, the thread of a feed bobbin is continuous withdrawn and fed to the subsequent process. To a continuous To ensure process flow, the thread end of the supply spool with the Thread beginning of a second feed spool, here referred to as reserve spool is knotted. After expiration of the supply spool is thus an automatic Overflow on the spare spool, the thread end in turn at a thread beginning another coil is knotted so that the process runs continuously. Here are the node-shaped bonds in the following loading or Processing the thread problem areas that lead to defects in the finished product being able to lead. In extreme cases, the bond may break, so that a thread break arises.

When texturing a thread, the thread becomes intense in the machining process treated. In this method, a plain yarn becomes a crimped yarn produced. For this purpose - as known for example from EP 0 641 877 - the Thread twisted and thermally treated for fixation in the twisted state. The bond between a thread end of a supply spool and affects a thread beginning a second feed bobbin (reserve coil) the Twist distribution, which results in an uneven ripple. Such imperfections can in the further processing of the crimped yarn e.g. lead to Anfärbefehlern.

EP 0 656 437 describes a method of feeding weft threads and depositing them in a fabric of a weaving machine, wherein the weft threads in the area monitored for quality defects between the yarn supply and the fabric, to prevent a weft with a quality defect, for example a knot into which tissue is woven.

Accordingly, it is an object of the invention to provide a method and an apparatus of of the type mentioned above for the continuous removal of a thread, which ensure that the subsequent process a thread with uniform quality is supplied.

Another object of the invention is to provide a method and a texturing machine for texturing a synthetic thread to provide from predetermined Feed bobbins with a smooth yarn specific to the feed bobbin assignable Making wraps with curled yarn.

This object is achieved by a method with the features according to claim 1 as well as by a Texturing machine according to claim 15 solved.

The invention is characterized in that after deduction of the complete Feed bobbin a signal appears. This is for example an operator indicated that in the processing or processing a change of the submitted Garnes is imminent. This is an assignment between the finished or End product and the feed bobbin given. The operator can take action initiate to detect possible erroneous events due to the nodular bond in the To avoid thread. To the transition from the original bobbin to the To detect reserve coil, a sensor is used, which by signaling the Filament transition from the supply spool to the reserve spool (yarn change) indicates.

In principle, three different inventive Method variants are used.

Advantageously, the thread is continuously passed through the sensor. Of the Sensor is in this case designed such that when passing the node-shaped Binding, the thread end of the feed bobbin and the thread beginning the Reserve coil represents a signal is generated by the sensor. These Process variant has the advantage that the thread is independent of location on a can be sensed anywhere in the machine. It is also possible to use a device of the follow-up process that has a process parameter, For example, a thread tension detected. Here is the discontinuity of the Signal of the device evaluated to indicate the passing of the binding.

In a further advantageous variant of the method is only a portion of the thread, which consists of a piece of thread at Thread end of the supply bobbin and a thread piece at the beginning of thread Reserve coil passes through the sensor. For this the sensor is between arranged the supply spool and the reserve coil. Since deduction of Feed bobbin the thread end of the supply bobbin and the thread beginning the Reserve spool loosely in a loop between the two coils is through this variant of the method given a possibility, the thread only immediately to be sensed before changing the yarn. Thus the influence of the sensation becomes minimizes the thread.

Since the thread end of Feed bobbin and the thread beginning of the reserve spool during the withdrawal of Resting supply bobbin, Advantageously, already the movement of a piece of thread in the Area used to signal the yarn change. These Process variant is characterized in particular by the fact that simple Device parts are required to carry out. The thread piece can For this purpose, for example, be inserted in a sensor that generates a signal, as soon as the piece of thread no longer rests.

It should be noted at this point that the method is independent of the execution of the sensor is executable. For example, mechanical, optical or Capacitive sensors are used, which are an electrical, mechanical or generate pneumatic signal.

The perception of the signal by an operator continues proposed that the signal activates a signal generator to optically or to be displayed acoustically.

In a particularly advantageous embodiment of the invention according to claim 2 the signal is given to a controller of the process to intervene in to prepare or initiate the process. This process variant is especially for automatic processes of advantage. That's how it works achieve that, for example, replaced the empty original bobbin by a new coil is, whose yarn beginning is knotted to the yarn end of the reserve spool. Likewise, it is thus possible to document the yarn overflow, wherein For example, the position and the time is detected and stored. These Data can be the basis for further evaluation in quality management represent.

In processes where binding leads to failures or where an association between the original yarn and the finished or final product must be complied with, the process variant according to claim 9 is particularly advantageous. When the signal is pending, the process goes on for a period of time interrupted. For example, in a texturing process, a submitted Plain yarn in the process textured and then as a crimped yarn on one Coil wound up. In such machines are from a supply spool several end coils wound with crimped yarn. For this it is necessary that a bobbin change in the winding is completed. During the Spulwechsels the processed thread is in a suction device as waste dissipated. By the method variant according to the invention it is now possible, in such machines specifically a bobbin change in the To initiate winding up. The particular advantage here is that thus the Part of the thread that contains the bond can be removed as waste.

A further advantageous embodiment of the invention provides that in the Following process a monitoring mechanism is initiated, which certain Quality parameters recorded to maintain a consistent quality. In order to can in case of impermissible deviation of the quality parameter, for example the Thread tension, a process change or a process interruption initiated become. As quality parameters, process parameters such as e.g. Thread speed, thread tension or product parameters such as e.g. Thread temperature are detected.

To an association between the yarn of the supply spool and the respective To ensure product is the process variant according to claim 12 and 13 especially advantageous. In this case, by the control device pending Signal a change of the supply spool and a registration of the new one Feed bobbin causes. For this purpose, for example, a changing device be activated, which selects a feed bobbin with a specific yarn and changes to the empty position of the withdrawn supply bobbin. Thus, there is the Possibility, in addition to the assignment between submitted yarn and end product also the material-specific events in the process to the respective intermediate product zurückzubeziehen. However, the registration of the new supply spool can also via manual input of markings of the respective feed bobbin respectively. The registration remains advantageous within the control device stored until by thread transfer the substitute feed bobbin is deducted.

The invention is preferably used in processes in which a thread is processed, which subsequently in a further processing process a final product is performed. This is a method of texturing a possible with multifilament synthetic thread, in which the produced winding exactly specified in terms of its starting material based on the feed bobbin can be. The inventive method is thus characterized in particular characterized in that winding can be produced with crimped yarn, the one Have thread from beginning to end with consistently high quality. Defects by nodular bonds can be treated individually. In the event that the monitoring of a quality parameter is not performed by the Bond caused impermissible deviation of the quality parameter, The winding is generated without interruption. If the limit value is exceeded Quality parameter or generally pending thread overflow signal can Winding the crimped thread, for example by an automatic Change of the winding to be interrupted.

When texturing synthetic threads, machines are used which numerous processing points are arranged in floors next to each other. When using such machines, the method variant according to claim 3 can be used particularly advantageously to continuously texturize the thread. In this case, each take-up device are associated with two feeders, in which the supply spool and the reserve spool are arranged. The Registrations of the supply spool and the reserve spute are with the respective Templates linked and stored in the control system, so that the generated Winding due to the currently active original position with regard to the starting material can be specified exactly.

The process variant according to claim 4 is particularly advantageous to a Sorting the winding to make. So can the bond in the thread indicate by a winding time and a thread length, which for example as Data print can be attached to the winding.

In the event that several reels are generated from a supply spool is the method variant according to claim 5 is preferably used. It receives every reel, which originated from a supply reel, a marking. The Marking will be on signaling the yarn change for the following Wickel changed, since these made from another submitted yarn become. Thus, the crimped thread can be up to the spinning process, in the the plain yarn was made, trace back.

A further sorting of the generated winding can thereby be achieved that of the yarn change and thus the bond in the thread containing Wickel receives an additional marking. Such sorting is particularly advantageous to, for example, when weaving between warp and To distinguish shot coils.

The labeling can be done easily by a numbering, which is restarted after each thread overflow.

For carrying out the method according to the invention is a texturing machine with the Characteristics used according to claim 15.

To arrange the sensor for sensing the thread in the device, are basically two different sensor types Embodiments of the device according to the invention possible.

Another solution to the underlying problem is also by a Texturing machine given with the features of claim 15. Because the Refinement of the thread in the texturing process only by a considerable intervention in the structure of the thread is possible, in particular irregularities in the Thread, as caused by a knot-shaped bond, separately to to treat. The texturing machine according to the invention is the possibility given a thread continuous with uniform quality regardless of a thread transition when deducted from the supply spool to a reserve spool to texture, wrap and spool.

The formation of the texturing machine according to the invention according to claim 16 is preferably used here, since the design and the arrangement of Sensor is possible in a simple manner. This is a continuous sensation the thread is not required. Only in the case of the thread transition is the between The thread piece located with the binding is removed from the two bobbins. The Movement of the thread piece is detected and signaled by the sensor.

Such sensors are preferably designed as thread monitor, in which in a rest position the thread piece is held and in which by Movement of the thread piece of the thread monitor is guided in a signal position and generates a signal. This signaling can be in a simple way with generate a contact switch.

When using sensors that optically or mechanically the thread continuously Sensing, the formation of the texturing according to the invention is after Claim 18 or 19 advantageously applicable.

It is proposed, inter alia, that the sensor as a Fadenzugkraftmesser is formed, which the yarn tension from the current Thread detected and which when exceeding a limit of the yarn tension generates a signal. Here it is assumed that the thread transition of the Feed bobbin for reserve spool the deduction behavior of the thread for a short time changes and thus leads to a thread tension fluctuation. These Development of the texturing machine is preferably used in processes where the actual binding no significant influence in the Further processing of the crimped yarn has. In that regard, only at Deviation of a specified limit value of the thread tension a signal generated.

For the optical or acoustic perception of the signal by 21 a Operator is the sensor according to the embodiment of claim 21 with connected to a signal generator. The signal generator can be as a lamp or Train siren.

In order to perform the interventions in the process automatically, the Texturing machine according to the invention preferably designed according to claim 22.

In this case, the control means comprises means for detection, evaluation and output quality parameters and means for linking the quality parameters with on the thread transition dependent signals. The inventive Texturing machine is thus suitable, a continuous quality control From the original bobbin to the winding to perform so a high quality To provide thread for further processing.

In the following, the methods and devices based on some Embodiments of a textile machine described in more detail.

Fig. 1

schematisch ein Ausführungsbeispiel einer Falschdralltexturiermaschine mit der erfindungsgemäßen Vorrichtung;

Fig. 2

schematisch einen Querschnitt einer erfindungsgemäßen Texturiermaschine;

Fig. 3

schematisch eine Draufsicht auf ein Gattergestell mit Vorlagespulen;

Fig. 4

schematisch ein Ausführungsbeispiel eines Fadenwächters.

They show:

Fig. 1

schematically an embodiment of a false twist texturing machine with the device according to the invention;

Fig. 2

schematically a cross section of a texturing machine according to the invention;

Fig. 3

schematically a plan view of a gate frame with feed bobbins;

Fig. 4

schematically an embodiment of a thread monitor.

In Fig. 1, a false twist texturing machine is shown. Here is one Original bobbin 2 plugged into a trained as a mandrel submission 8. From the supply spool 2, a thread 1 is subtracted from a first delivery mechanism 11. For this purpose, the thread 1 from the supply spool 2 overhead through the Thread guide 10 out. The delivery mechanism 11 promotes the thread in one Falschdralltexturierzone. The false twist texturing zone has a heating device 12, a following in the yarn path cooling device 13 and a false twist unit 15 on. The thread 1 is by a second delivery mechanism 16 from the Falzdralltexturierzone deducted and for post-treatment in a second Heating device 17 out. At the output of the second heater 17 is a further delivery mechanism provided, the thread from the heater 17th withdraws and leads to a subsequent take-up device. The Winding device has a winding spindle 21, on which a winding 20th is formed. The winding 20 is via an adjacent drive roller 22nd driven. In the yarn path is before the winding 20 a traversing device 23rd arranged. The traversing device 23 has an oscillating yarn guide, which moves the yarn back and forth transversely to the direction of rotation, so that a Cheese is wound.

Laterally next to the supply spool 2 is in a second Vorlegestelle 9 a second Origination coil, which is referred to as a reserve coil 3, on attached a thorn. The feed spool 2 and the reserve spool 3 can Here, for example, be arranged in a template gate, in which a Variety of feed bobbins for a variety of processing stations in the Texturing machine are provided. The yarn end 6 of the supply spool 2 is with the thread beginning 7 of the reserve coil 3 knotted together so that a bond 5 arises in the thread. The section of the thread with the binding 5 between the Feed bobbin 2 and the reserve coil 3 is stirred in a sensor 4. The sensor 4 has a signal line 26 through which the sensor 4 with a Control device 24 is connected. The control device 24 has several Exits 25 to control the process of the texturing machine.

In the textile machine shown in Fig. 1, the thread 1 is continuously from deducted from the supply spool 2 and textured in the false twist texturing zone. The thread 1 is replaced by the false twist unit 15 a false twist, the is fixed in the heater 12 and the cooling device 13. The Delivery mechanisms 11 and 16 are operated with a speed difference, so that at the same time a stretching takes place in the false twist texturing zone. Of the Thread 1 is after a shrinkage treatment in the heater 17th then wound up in the winding device to the winding 20. at Such a process becomes from the yarn of the supply spool 2 in succession several coils 20 wound. This is done after reaching the Enddurchmessers the winding on the controller 24 a bobbin change in the take-up device initiated. While the wraps 20 against a new one Empty tube is replaced, passes the continuously delivered thread 1 over a suction device in a waste container until the winding process will continue.

The thread 1 is continuously conveyed by the delivery mechanism 11. Therefore, done after deduction of the yarn from the supply spool 1 a change to the yarn of Reserve spool 3. For this purpose, the thread end 6 of the supply spool 2 and the Fadenanfang 7 of the reserve coil 3 knotted together in a binding 5. At the Change from the original bobbin 2 to the reserve coil 3 will now be the section of the thread from the delivery 11 also deducted. As the section of the thread is sensed in the sensor 4, the sensor 4 detects the thread transition of the Feed bobbin 2 on the reserve coil 3. For this purpose, the sensor 4 such be formed so that the thread end 6 and the thread beginning 7 by the sensor. 4 be guided so that the passage of the bond 5 registered by the sensor 4 and is converted into a signal. However, it is also possible, the sensor such form, that only the movement of a thread piece at the thread end 6 or at the beginning of the thread 7 is sensed. The signal generated by the sensor 4 is indicated via the signal line 26 of the controller 24 to over the Control device 24 to initiate a change of the winding. This can be advantageously avoided that the portion of the thread with the binding. 5 is wound up on a winding. Furthermore, this allows the assignment between the supply spool 2 and from the yarn of the supply spool 2 Derive completed winding. For this purpose, for example, a label on the last wrap by labeling, a binding bead or a simple visible marking.

However, it is also possible, the portion of the thread with the binding 5 on the Winding up wraps. The winding containing the binding can then be also indicate, so that a sorting of the coils for the Finishing, e.g. in warp and weft material is possible.

By the control device 24 can also be advantageous Activate surveillance system to target malfunction due to Binding 5 caused in the process to pay attention. Likewise, the Quality parameters, such as thread tension, thread break, in the Period of time have occurred in which the yarn of the pre-winding 2 processed was, evaluate. This can be targeted to the quality of the yarn Feed bobbin closed.

Furthermore, can be on the controller 24, the placement of the Master submission gates. For this purpose, a new feed bobbin on the mandrel 8 stuck to the thread beginning of the new supply bobbin with the thread end of the Tie reserve spool.

The method according to the invention is shown in FIG. 1 by means of a texturing machine exemplified. However, the method according to the invention can be applied to all apply known textile machines, in which a thread of a Feed bobbin continuously fed to a loading or processing process. In Fig. 2 is an embodiment of a texturing machine according to the invention shown. Here, one half of a machine cross section is a False twist texturing machine shown in Fig. 2. At the following Description, the components with the same function by identical Reference number marked.

The texturing machine comprises a gate frame 28, a process frame 29 and a Winding frame 27. Between the winding frame 27 and the process frame 29 is a service 30 is provided. On the opposite to the service 30 Side of the winding frame 27, the gate frame 28 at a distance from Winding frame 27 is arranged. Between the winding frame 27 and the Gate frame 28 is a Doffgang 31 for a doffer, not shown intended. The texturing machine has a plurality of processing stations on, in each of which a thread 1 is processed. The processing stations are formed parallel to each other. The take-up devices 32 take one Width of three processing stations. Thus, three Winder 32.1, 32.2 and 32.3 stacked one above the other in the Winding frame 27 is arranged.

Each take-up device 32 are in the gate frame 28 two presentation sites associated, which are formed by the mandrels 8 and 9. On the thorns 8 and 9 are the feed bobbins 2 and 3 attached. The coils 2.1 and 3.1 are the Winder 32.1, the coils 2.2 and 3.2 are the take-up 32.2 and the coils 2.3 and 3.3 are assigned to the take-up device 32.3. The threadline will be described below with reference to a processing station. The thread end of the feed bobbin 2, from which the thread 1 is being pulled off, is with the thread beginning 7 of the reserve coil 9 by a node-shaped bond 5 connected.

In each processing station, the thread 1 by a first delivery mechanism 11 of the supply bobbin 2 via a head thread guide 10 and a yarn guide 14.1 deducted. In front of the delivery mechanism 11 is a sensor 4 for continuous Sensation of the thread 1 arranged. The sensor 4 is via the signal line 26th connected to the control device 24. When viewed in the direction of yarn travel, is behind the first delivery mechanism 11, a first heating device 12, a Cooling device 13, a false twist unit 15 and a second delivery mechanism 16 arranged. In the threadline between the false twist unit 15 and the second Delivery mechanism 16 is a yarn tension sensor 35 is provided, wherein the thread in the Inlet and outlet are each guided over a yarn guide 36.1 and 36.2. The yarn tensile force meter 35 is connected to a control device 24.

Between the take-up device 32 and the second delivery mechanism 16 are a second heating device 17, a yarn guide 14.3 and a third delivery mechanism 18th arranged. The thread 1 is between the supply spool 2 and the Winding device 32 guided by a plurality of yarn guides 14.1, 14.2 and 14.3. These yarn guides are preferably designed as deflection rollers.

In the winding device 32, the thread is wound into a winding 20. The winding 20 is driven by a drive roller 22. Before the drive roller 22 a traversing device 23 is arranged. By the traversing device 23 the yarn 1 is guided back and forth on the winding 20 and in this way as Cross winding wound up.

The winding device 32 has a winding storage 34, the Recording the full roll 20 is used. To decrease the full winding 20 is the winding spindle pivoted by means of a bobbin and the full winding on filed a rolling track. The rolling track is part of the winding storage 34. Auf the roller conveyor waits for the full roll 20 until it is transported away. to To simplify the removal, the rolling track is inclined towards the Doffgang 31. Furthermore, each winding device 32 has a sleeve feeding device 33 on

Each take-up device 32 is controllable via a take-up control 37. The Aufwickelsteuerungen 37.1, 37.2 and 37.3 are with the controller 24th connected.

At the gate rack 28 is an input unit 38 to each processing station provided, which is coupled to the control device 24.

In the situation of the texturing machine shown in Fig. 2 is in the individual processing stations each of the thread 1 of the supply spool. 2 subtracted, textured in the false twist zone, in the second heater relaxed and then wound into a roll 20. This is done for Quality control continuously a thread tension measurement by the Fadenzugkraftsensor 35. The measured values are respectively the control device 24th abandoned for evaluation and process control.

After the feed bobbin 2 has been pulled off to the end, a yarn transfer takes place to the second supply spool 3. Once the bond 5 in the thread 1 the sensor. 4 happens, a signal via the signal line 26 of the controller 24th given up. The control device 24 can now different Initiate control measures.

One possibility is to use the take-up control 37 in the respective Winding device 32 of the respective processing stations such to act, that a roll change takes place. In this case, the Winding process interrupted. About a not shown here Auxiliary device, the thread is cut and a suction device dissipated. The winding is then in the winding device 32 by a replaced new sleeve. During the winding change thus runs the thread piece the bond 5 in the suction to a waste container (not here ) Shown. With new incipient winding thus the first winding is off the yarn of the supply spool 3 is generated. This can be done simultaneously by the Aufwickelsteuerung 37 a continuous marking of the generated winding, which are created from the yarn of the supply spool 3 done. The Labeling can be the processing station, a continuous Numbering and the characteristics of the feed bobbin included. The characteristics or the registration of the supply spool 2 or the supply spool 3 takes place here manually via the input unit 38. In this case, when changing the Feed bobbin the characteristics of the feed bobbin by an operator by means of registered the input unit 38 and the control device 24 abandoned. In order to For each processing station is the information which feed bobbin or which yarn is submitted and processed.

Another possibility to intervene in the process is that the Control device 24 via the take-up control 37 on the Processing station acts that the winding containing the bond separately is marked. Since several bobbins are formed from a supply spool, Thus, a targeted sorting can be made.

Furthermore, the control means may include means for signaling by the sensor 4 monitoring and evaluation of the continuous supplied quality parameters - such as the thread tension - make. That only if a predetermined limit is exceeded a winding change initiated. Likewise, it is possible at the Quality control the deviations caused by the bond 5 to eliminate, especially in a long-term yarn breakage monitoring is beneficial.

In the arrangement shown in Fig. 2, the sensor 4 is exemplary of the first delivery 11 arranged. The sensor 4, the optical or mechanical Means to capture the bond 5 can also be found elsewhere in the Be arranged threadline.

The Texturiereinrichtung the machine of FIG. 2, the false twist unit, includes the heater and the cooling device is exemplified. A Texturing of the thread may also be accomplished by other means, e.g. Verwirbelungsdüsen, done. The invention also covers such machines.

In Fig. 3, another embodiment of a gate frame is shown as it For example, in a machine according to Fig. 1 or Fig. 2 would be used. The Gate frame consists of a rotatable shaft 42, at the periphery evenly distributed three T-shaped carrier 41.1, 41.2 and 41.3 are arranged. At the free ends of the T-beam are the mandrels 8 and 9 for receiving each arranged a supply coil. The mandrels 8 and 9 can be advantageous here pivotally connected to the carrier 41. Each carrier 41 contains for one Workstation a feed coil 2 and a reserve coil 3, wherein the adjacent supply bobbins of the adjacent T-carrier to one Include processing station. The threads 1 are hereby of the respective Feed bobbins 2.1, 2.2 and 2.3 above an in-axis Head thread guide 10 deducted. Between the supply spool 2 and the Reserve coil 3 is arranged as a sensor acting thread monitor 39. By doing Thread monitor 39 is a thread piece, resulting from the beginning of the thread Reserve coil and the thread end of the feed bobbin, inserted. Of the Thread monitor 39 is connected to a signal generator 40. The signal generator 40 is in this case designed as a lamp. The thread monitor 39 is also with a Control device 24 coupled.

The arrangement shown in Fig. 3 causes after deduction of the supply spool. 2 the thread monitor 39 is activated, as described in more detail below becomes. Thus, the signal generator 40 is activated. For the operator is now immediate recognizable at which processing station a yarn change is pending or at which processing station a new supply coil in the gate changed must become. By the connection to the control device 24 can automatically executing actions immediately implemented in the subsequent process become.

4, an embodiment of a thread monitor is shown as he For example, in the gate of FIG. 3 would be used.

In Fig. 4.1 is a side view and in Fig. 4.2 is a plan view of Threadguard shown. The following description thus applies to both Characters. The thread monitor consists of a holder 52 and a movable Thread guide 43. The holder has a groove 47. In the groove 47 is the Thread guide 43 pivotally mounted on a pivot axis 44. The thread guide can be between a rest position 49 and a signal position 50th move. In the rest position 49 of trained as a rod thread guide 43 is in upright position against a stop 51 placed. In this rest position 49 the thread guide 43 penetrates a holder 52 on both sides of the groove 47 introduced guide notch 48. In the guide notch 48, the thread is the first guided and simultaneously deflected and fixed by the yarn guide 4. By Pivoting the thread guide 43 from the rest position 49 in a Signal position 50 arrive. In the signal position 50 is a contact switch 45th arranged, which can be activated by conditioning the yarn guide 43. Of the Contact switch 45 is not on a signal line 46 with a here connected signalers connected.

In the position of the thread monitor shown in Fig. 4.1 and 4.2, the thread is the first trapped. The piece of thread between the supply spool and the spare spool is at rest. Now the thread transition from the supply spool to the Reserve spool, the thread 1 is withdrawn from the thread monitor. Thereby the yarn guide 43 is moved away from the stop 51 and falls into the Signal position. Thus, the contact switch 45 is activated, so that a signal is produced. The thread monitor described here is to be regarded as an example. The invention is not limited to individual versions of sensors but basically covers all embodiments known to the person skilled in the art, which make it possible to recognize a nodular bond in the thread and then generate a signal.

LIST OF REFERENCE NUMBERS

1

thread

2

supply bobbin

3

reserve package

4

sensor

5

binding

6

thread end

7

thread start

8th

Thorn, submission

9

Thorn, submission

10

Yarn guide

11

delivery mechanism

12

heater

13

cooler

14

thread guides

15

False twist unit

16

delivery mechanism

17

heater

18

delivery mechanism

19

thread guides

20

reel

21

spindle

22

drive roll

23

Traversing device

24

control device

25

outputs

26

signal line

27

winding frame

28

gate

29

process frame

30

service transition

31

doffing aisle

32

takeup

33

Sleeve feeder

34

winding storage

35

Yarn tension sensor

36

thread guides

37

take-up

38

input unit

39

thread monitor

40

signaler

41

carrier

42

axis

43

thread guides

44

swivel axis

45

contact switch

46

signal line

47

groove

48

guide notch

49

rest position

50

signal position

51

attack

52

holder

Claims (25)

1. Method for texturing a synthetic multifilament yarn, wherein the yarn is withdrawn from a feed yam package as a smooth yam, textured and wound as a crimped yam into a package, the yarn being withdrawn from the feed yarn package by a conveying means and supplied to the treatment process for texturing and the loose trailing end of the yarn feed package being knotted to a loose leading end of a yarn reserve package, characterised in that the yarn transfer from the yarn feed package to the yarn reserve package is detected by a sensor and signalled by a signal.
2. Method according to claim 1, characterised in that the signal is supplied to a controller of the treatment process to cause a change in the treatment process and/or a change of the feed yarn package.
3. Method according to either claim 1 or claim 2, characterised in that the package is produced in a take-up device which is associated with a feed position accommodating the feed yarn package and with a feed position accommodating the reserve package, and in that registration of the feed yam package and the reserve package is linked to and stored with the respective feed position.
4. Method according to claim 3, characterised in that when the yarn change from the feed yarn package to the reserve package is signalled, the package being produced during the yam change receives an identification.
5. Method according to any one of claims 1 to 4, characterised in that the feed yarn package includes a yarn length which is adequate for winding a plurality of produced packages, the produced packages being identified as related to the feed yarn package.
6. Method according to claim 5, characterised in that when the yarn change from the feed yarn package to a reserve package is signalled, the identification is changed for the subsequently produced packages.
7. Method according to either claim 5 or claim 6, characterised in that the package being produced during the yarn change from the feed yarn package to the reserve package receives an additional identification.
8. Method according to any one of claims 5 to 7, characterised in that the identification is effected by a numbering related to the feed yam package.
9. Method according to claim 2, characterised in that the controller interrupts the treatment process for a period of time, when a signal is received.
10. Method according to claim 9, characterised in that the controller causes temporary monitoring of at least one quality parameter, and that in the event of unacceptable deviations of the quality parameter the treatment process is changed or interrupted.
11. Method according to claim 10, characterised in that the quality parameter is a product parameter characterising the produced yarn and/or a treatment process parameter characterising the progress of the treatment process.
12. Method according to any one of claims 2 to 11, characterised in that the controller causes a change of the feed yarn package and registration of the new feed yarn package.
13. Method according to claim 12, characterised in that the registration of the new feed yam package is stored by the controller and associated with the treatment process, when a signal indicates the yarn change to the feed yam package.
14. Method according to any one of the preceding claims, characterised in that the signal activates an optical or acoustic signalling device to cause a change in the treatment process and/or a change in the feed yarn package.
15. Texturing machine for texturing and winding a yarn (1) comprising at least two feed positions (8, 9) for mounting two feed yarn packages (2, 3), comprising a plurality of feeder rolls (11, 16, 18) arranged in succession in the direction of the advancing yarn, comprising a texturing device (12, 13, 15) and a winding device (32), the yarn (1) being withdrawn alternately from the feed positions (8, 9) by first feeder rolls (11) and a yarn end (6) of one of the yarn feed packages (12) being knotted to a leading end (8) of the other yarn feed package (3), which is called the yarn reserve package, characterised in that a sensor (4) is provided which detects and signals the yarn change from the yam feed package (2) to the yarn reserve package (3).
16. Texturing machine according to claim 15, characterised in that the sensor (4) is arranged between the two feed positions (8, 9), so that the yarn length from the trailing yarn end (6) of the feed yam package and the leading yarn end (7) of the reserve package (3) can be scanned.
17. Texturing machine according to claim 16, characterised in that the sensor (4) is constructed as a yam detector (39), which holds a yarn length in an idle position (49), and which reaches a signalling position (50) by the movement of the yarn length and generates a signal in the signalling position (50).
18. Texturing machine according to claim 17, characterised in that the yarn detector (39) comprises a movable yam guide (43) and a contact switch (45), the contact switch (45) being activated for generating a signal by the movement of yarn guide (43) from its idle position (49) to its signalling position (50).
19. Texturing machine according to claim 15, characterised in that the sensor (4) is arranged, in the direction of the advancing yarn, downstream of the feed positions (8, 9) and upstream or downstream of the first feeder rolls (11), so that the advancing yarn (1) can be continuously scanned by the sensor.
20. Texturing machine according to claim 19, characterised in that the sensor (4) is constructed as a yarn tensiometer (35), which measures the tension of the advancing yarn (1) and generates a signal when a limit value of the yarn tension is exceeded.
21. Texturing machine according to any one of claims 15 to 20, characterised in that the sensor (4) is connected to a signalling device (40).
22. Texturing machine according to any one of claims 15 to 21, characterised in that the sensor (4) is connected to a controller (24) which controls the devices of the texturing machine.
23. Texturing machine according to claim 22, characterised in that the controller comprises means for detecting, evaluating and outputting quality parameters and means for linking the quality parameters to the signals dependent on the yam change.
24. Texturing machine according to either claim 22 or claim 23, characterised in that the controller (24) is connected to an input unit (38) associated with the feed positions (8, 9), which unit (38) can be used to register the feed yarn packages.
25. Texturing machine according to claim 24, characterised in that the controller (24) is connected to a winding controller (37) which controls the winding device (32) associated with the feed positions (8, 9).

Images