EP0852216B1 - Textile machine for making cross-wound bobbins - Google Patents

Description

The invention relates to a cheese making Textile machine according to the preamble of claim 1.

Such textile machines producing cross-wound bobbins are in known various embodiments.

DE 39 04 065 C2 describes, for example, an automatic winder, the winding stations of which each have a device for regulating the thread tension during the winding process.
These known devices have a device for detecting the rotational speed of the cheese, a device for calculating the current diameter of the cheese and a storage device with a predetermined thread tension program.
In devices equipped in this way, the thread tensioner is controlled during the bobbin travel so that the thread tension gradually decreases as the diameter of the package increases.

A device is also known from EP 0 350 081 A1, at which the winding speed of the winding units in Controlled depending on the remaining thread length of the supply spools becomes. The facilities also each have one Thread tensioner on during the winding process if necessary can be controlled in a defined manner by the winding unit computer.

In connection with automatic winder, thread tensioners are have a rotatable brake actuator arrangement, wherein one of the brake actuators axially by means of a moving coil has been known for a long time. DE 41 30 301 A1 for example, describes one of these, in practice in many cases proven thread tensioner.

From DE 39 02 182 A1 is an automatic winder with a A variety of winding units are known, each separate Have winding station computer, which to a central Control unit of the textile machine are connected. With this central control unit of the textile machine is also a the service unit supplying the winding units. The service unit can via the central control unit and the winding unit computer the winding drive of each winding unit like this control that during the change process Cheese / empty tube the thread guide drum with a compared to the 'normal' winding process, i.e. reduced peripheral speed rotates.

DE 42 21 504 A1 describes an automatic winder, the workstations of which are connected to a service vehicle via a bus line.
If there is a need for operation at one of the workplaces, the workstation in question sets an optical signal which is recognized by the service vehicle patrolling in front of the workplaces and which is confirmed at the workstation by a light signal to the workstation. This light signal activates the relevant work station, so that work commands, for example, turning the drive roller backwards, blowing off work stations or the like, can then be set down from the service vehicle via the bus line.

Based on the aforementioned prior art, the Invention based on the object in connection with Automatic winding machine usual automatic change process To improve the package / empty tube.

This object is achieved by a device solved, as described in claim 1.

Advantageous embodiments of the invention are the subject of Dependent claims.

The design according to the invention has the particular advantage that the setting of the thread tensioner of the winding unit controlled via the winding unit computer can be specifically adapted to the present requirements both during the winding process and during the cross-wound / empty tube changing process.
That is to say, in particular in the case of the bobbin handling measures to be carried out in connection with the bobbin / empty tube change process, the thread tension required in each case can be optimally adapted by means of the thread tensioner arranged at the winding point in accordance with parameters specified by the control computer of the service unit. It is possible to choose smaller settings during the changing process than those that are common during the winding process.

As the control computer of the service unit the thread tensioner can precisely control the winding unit via the machine bus it is not necessary for the service unit to operate during of the change process to maintain an exact thread tension can have their own thread tensioning device.

In an advantageous embodiment of the invention it is provided (Claim 2) that the control computer of the Service units can be specified via the thread tensioner on the Thread attachable thread tension values according to the respective coil handling measures of the service unit are individually adaptable. The thread tension will consequently also automatically set optimally during the change process and depends, for example, on whether the package is a Head reserve in the form of a head reserve Tendon or a head reserve winding in the form of one on the So-called top-cone winding applied to the sleeve tip should receive. Also when creating the foot reserve winding a special, optimal one is automatically placed on the empty tube Thread tension set.

The parameters required to set the thread tensioner can from the control computer of the service unit either, as described in claim 4, in absolute values be specified or, as set out in claim 5, as Percentage deviation from adjustable setpoints.

A specification of the setting parameters as a percentage deviation of setpoints is particularly advantageous because of these Way also during the winding process Setting the thread tensioner to the currently processed Yarn, for example in terms of tear strength, is possible.

Further details of the invention are as follows exemplary embodiment explained with reference to the drawings removable.

Fig. 1

eine Vorderansicht einer Kreuzspulen herstellenden Textilmaschine mit einem Serviceaggregat, das über einen Maschinenbus mit den Spulstellenrechnern der Spulstellen verbunden ist,

Fig. 2

eine Seitenansicht auf eine Spulstelle eines Kreuzspulautomaten, mit einem über einen Maschinenbus vom Steuerungsrechner des Serviceaggregates ansteuerbaren Fadenspanner,

Fig. 3

schematisch eine Spulstelle mit einem vom Steuerungsrechner des Serviceaggregates ansteuerbaren Fadenspanner.

It shows:

Fig. 1

2 shows a front view of a textile machine producing cross-wound bobbins with a service unit which is connected to the winding station computers of the winding stations via a machine bus,

Fig. 2

2 shows a side view of a winding unit of an automatic winder, with a thread tensioner that can be controlled by a machine bus from the control computer of the service unit,

Fig. 3

schematically a winding unit with a thread tensioner that can be controlled by the control computer of the service unit.

In Fig. 1 is a front view schematically with a total producing the number 1 marked cross-wound bobbins Textile machine, in the exemplary embodiment an automatic winder, shown. Such automatic winder machines usually have between their end frames 35, 36 a variety of similar Jobs, in this case winding units 2, on. On these winding units 2, as is known and therefore not closer explained on a (not shown) Ring spinning machine produced spinning reels 9 too large Cross-wound bobbins 11.

The finished packages 11 are by means of a automatically working service unit, for example by means of a package changer 23, on one Cross-wound bobbin transport device 21 rolled out and then to a machine end (not shown) Coil loading station or the like transported.

Such automatic winder 1 also often have one Logistics facility in the form of a coil and Sleeve transport system 3. In this coil and Sleeve transport system 3 run, on transport plates 8, Spinning cops 9 or uncoiled empty tubes 34 um.

Furthermore, such cross winding machines 1 have one Central control unit 37, both via a machine bus 40 with the separate winding unit computers 39 of the individual Spooling stations 2 as well as with the control computer 38 Service units 23 serving winding stations 2 is connected.

As can be seen in particular from FIG. 2, the service unit 23 is movably mounted with carriages 24, 25 on machine-long tracks 26, 27 which are arranged above the winding units 2.
The service unit 23 not only ensures that the cross-wound bobbins 11 finished on the winding units are rolled out onto the cross-wound bobbin transport device 21, but it also independently changes an empty tube 28 into the bobbin frame of the winding unit 2 in question. The service unit 23 preferably takes the empty tube 28 from an empty tube magazine 22 that is provided in the winding unit.

Of the relatively extensive and generally known bobbin and tube transport system 3, only the machine-long bobbin feed path 4, the reversing path 5 running behind the bobbin units 2, one of the transverse transport lines 6 leading to the bobbin units 2 and the tube return path 7 are shown in FIG. 2.
The spinning heads 9, which are supplied via the feed section 4 and distributed over the reversing section 5 to the transverse sections 6, are rewound into large-volume cross-wound bobbins 11 in the unwinding positions 10, which are located in the region of the transverse transport sections 6 at the winding stations 2.

The individual winding units 2 have, as is known and therefore only hinted at, various devices which ensure proper operation of these work stations.
In Fig. 2, 30 is the thread running from the spinning cop 9 to the cheese 11, 12 is a suction nozzle and 42 is a gripper tube. A splicing device has the reference number 13, a thread tensioning device has the reference number 14. In addition, such winding units have a thread cleaner 15 with a thread cutting device and a paraffinizing device 16.

The drive drum that the cheese 11 during the Drives winding process over friction, carries the Reference number 17. During the winding process, the cheese is 11 held in a coil frame 18 which is about an axis 19 is pivotally mounted. Below the coil frame 18 is also rotatable to a limited extent about the pivot axis 19 Swivel plate 20 arranged over which the finished cheese to the one behind the winding units 2 Cross-wound bobbin transport device 21 can be transferred.

As already indicated above, the winding units 2 via a service unit, a so-called cross-coil changer 23, supplied. That is, the package changer 23 provides ensure that cross-wound bobbins 11 which have a predetermined diameter have reached, on the bobbin transport device 21st be carried out and that subsequently from the Empty sleeve magazine 22 each have an empty sleeve 28 in the Coil frame 18 is replaced.

2 shows some of the handling elements of the service unit 23 required in the course of the cross-wound / empty tube change process, which are: frame opener 29, frame lifter 32, coil guide device 33 and sleeve feeder 31.
For the sake of clarity, the illustration of further handling elements of such cross-wound bobbin changers has been omitted in this figure. The devices for creating a head reserve winding and the foot reserve winding are not shown, for example.

As indicated in Figures 1 to 3, are about the Machine bus 40 the central control unit 37 of the Textile machine 1, the winding unit computer 39 of the individual Winding units 2 and the control computer 38 of the Service units 23 connected to each other.

3 shows that the winding unit computer 39 has a plurality of so-called drivers 43, which are each connected to downstream functional elements via command lines. The output stage 44 of the thread tensioner 14 is connected, for example, via a command line 41 to one of the drivers 43 of the winding station computer 39.
The known and proven thread tensioner 14 has, as usual, a turntable arrangement 47, 48. The turntable 47 can be acted upon in rotation by a drive 49, while the turntable 48 can be axially displaced by a moving coil 45, 46.
Between the turntables 47, 48, the thread 30 drawn off from a spinning cop 9, which is subsequently wound up into a cross-wound bobbin 11, is clamped in a defined manner. The thread tension effective on the thread 30 can be adjusted via the degree of clamping of the brake adjuster of the thread tensioner.
This means that the thread tension in these known thread tensioners is adjusted by energizing the moving coil 45, 46 accordingly.

Function of the facility:

During the 'normal' winding process the thread tension on the Thread 30 regulated by the thread tensioner 14 to this Time from the winding unit computer 39 of the winding unit concerned 2 is controlled accordingly.

If at one of the winding units 2 of the automatic winder 1 a Cheese 11 their predetermined diameter or their has reached the specified thread length, is via the Thread cutting device 16 first separated the thread 30 and the cheese through a (not shown) Coil lifting device lifted from the drive drum. The Cross-wound bobbin 11 then runs in the braked or unbraked Standstill off.

Since the service unit 23 can only take one running thread 30, the package 11 is then lowered again onto the drive drum 17, which has meanwhile also become stationary, and the thread 30 is newly spliced in the splicing device 13 of the winding unit 2.
At the same time, the package changer 39 requests the bobbin changer 23. The request for the cross-wound bobbin changer can also be carried out preventively, that is to say the request signal can be issued before the cross-wound bobbin has reached its final diameter.

The requested service unit 23 positions itself at the winding station in question and initially picks up the thread 30 with a so-called thread lifter in order to keep it ready for the subsequent changing process. In addition, for the time of the change process, the control computer 38 of the service unit 23 takes over the control of the winding station computer 39 of the winding unit 2 in question via the machine bus 40. That is, during the changing process, the thread tensioner 14 is also controlled via the control computer 38 of the service unit 23 ,
The thread tension values, which are maintained by the thread tensioner 14 during the change process, are dependent on the respective bobbin handling measures or on the selected configuration of the bobbin 11.
If the package 11 is provided with a top-cone winding, for example, the thread 30 held in the thread lifter has to be wound onto the sleeve tip with a different thread tension than if the package has a thread end reserve in the form of a tendon.
To form a top-cone winding, the thread 30 held in the thread lifter is, for example, laid in the direction of the sleeve tip by means of a corresponding working element (not shown) and the cheese is slowly rotated in the winding direction. The thread tension is preferably slightly higher than the thread tension on the last section of the bobbin travel.
If the end of a cross-wound bobbin 11 is to be in the form of a string, the thread is briefly brought down from the outer surface of the cross-wound bobbin after the bobbin travel and immediately returned to the outer surface. In this case, it is advantageous to work with a significantly reduced thread tension.
The method for producing such a string is known in principle and is described, for example, in DE 40 40 532 C2.

After the desired reserve winding has been applied, the thread 30 is cut, the lower thread remaining fixed in a clamping device of the thread lifter.
Then the bobbin frame 18 is acted upon via the frame opener 29 of the service unit 23, so that the cheese 11 comes to rest on the swivel plate 20. The swivel plate 20 is then lifted by the frame lifter 32, so that the cheese rolls onto the cheese transport device 21. The cheese is guided by a bobbin guide device 33.

In the next step, through the sleeve feeder 31 Empty tube 28 from the winding unit's own empty tube magazine 22 taken and between the open arms of the coil frame 18th positioned. At the same time, the one held in the thread lifter So bobbin thread between the front of the empty tube and the Positioned sleeve receptacle of the coil frame 18 that he at Closing the frame is jammed. The service unit 23 then provides with a facility (not shown) for the empty sleeve 28, as usual, a Foot reserve winding receives. Even while creating this The control computer 38 of the foot reserve winding takes over Service units 23 control of the thread tensioner 14 and in this case ensures that the thread 30 with a slightly higher than the normal winding tension Thread tension is wound on the empty tube 28.

The winding unit computer 39 of the winding unit 2 takes over Activation of the thread tensioner 14 only when the regular winding operation resumes, that is, if that Service unit 23 leaves the winding unit.

Claims (5)

1. Textile machine producing cross-wound bobbins with a plurality of winding heads which each have a thread tensioner (14) which can be driven by a winding head computer (39), and a service unit (23), the control computer (38) of which can be coupled to the winding head computers (39) to transmit control commands, characterised in that the control computer (38) of the service unit (23) is equipped to output control commands to the winding head computer (39) to drive the thread tensioner (14) of the winding head (2) on which the service unit (23) is positioned.
2. Textile machine producing cross-wound bobbins according to claim 1, characterised in that the control computer (38) of the service unit (23) is connected to the winding head computers (39) of the winding heads (2) via a machine bus (40).
3. Textile machine producing cross-wound bobbins according to claim 1, characterised in that the thread tensioner (14) is driven by the control computer (38) of the service unit (23) during the various bobbin handling measures to be carried out by the service unit (23) in the course of the exchange of cross-wound bobbin/empty bobbin and can be optimally adjusted to the required thread tension value respectively.
4. Textile machine producing cross-wound bobbins according to any one of the preceding claims, characterised in that the parameters for adjusting the thread tensioner (14) can be predetermined in absolute values.
5. Textile machine producing cross-wound bobbins according to claims 1 to 3, characterised in that the parameters for adjusting the thread tensioner (14) can be predetermined as a percentage deviation from desired values.

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