EP2388222A2 - Method for manufacturing spinning cops - Google Patents

Abstract

The method involves arranging a coil on cops sleeve, producing spinning cops (3) on work station (2) of ring spinning machine and determining location and size of the coil or the spinning cops. The unwinding behavior of the spinning cops is evaluated during rewinding of the spinning cops on work station of a coil machine. The evaluated result is transmitted to the ring spinning machine. The evaluated result is processed from the controlling of the ring spinning machine for optimization of the location and size of the coil. An independent claim is also included for a ring spinning machine for the execution of a manufacturing method.

Description

Method for producing spinning cops

The invention relates to a method for producing spinning cops according to the preamble of claim 1 and to a ring spinning machine for carrying out the method.

Ring spinning machines for producing spinning heads have long been known and described in detail in numerous patents. Such textile machines each have a multiplicity of identical workstations on their longitudinal machine sides, which in turn each have different, stationary or vertically displaceably mounted working elements.
On each of the machine long sides, for example, a gate for receiving supply bobbins, a drafting device for warping the provided by the supply bobbins original material and a stationary spindle bank for receiving rotatably mounted spinning spindles are provided.
In addition, each mounted vertically displaceable, a ring rail for receiving spinning rings and ring travelers, a bank for balloon constriction rings and a bank for thread guide available.

The vertically displaceably mounted, usually designed as a machine-length benches components of the ring spinning machine are controlled by a corresponding drive mechanism 'according to a predetermined spinning program and ensure in conjunction with the rotatably mounted in the spindle spindle spindles that are made of the template material spinning cops.

The spin cops made on the workstations of such ring spinning machines, which contain relatively little yarn volume, are wound in a subsequent operation on the jobs of winding machines to large-volume cheeses.

The work stations of the winding machines are also equipped for this purpose with various bobbin handling or thread processing facilities.
The workstations of such winding machines have, for example, a winding device for the production of cheeses and a receiving device in which the spinning cop can be positioned to rewind functionally.
In addition, the workstations include, among other things, a yarn tension sensor, a yarn tensioner and an electronic yarn cleaner, all of which are connected to a bobbin control computer which also communicates with a central control unit of the winder via a machine bus or the like.

Fadenzugkraftsensoren, as for example by the DE 41 29 803 A1 are known, in conjunction with thread tensioners ensure that the thread is wound during Umspulvorganges with a predetermined, constant as possible thread tension on the cheese.

Electronic yarn cleaners, for example, in the EP 1 143 236 B1 ensure that during the winding process only perfect yarn is wound up on the cross-wound bobbin.
That is, the withdrawn from the spinning cop thread runs on its way to a large volume cheese by the electronic

Yarn cleaner, which continuously monitors the running thread for thread defects during the rewinding process and ensures that thread defects are immediately cleaned and replaced by almost yarn-like thread splices.
By means of such electronic yarn cleaners, however, not only yarn defects can be detected, but also the hairiness of a running yarn can be determined.

The winding speeds with which the work stations of winding machines work are limited to about 2000 m / min due to various physical conditions, in particular due to the thread tension forces occurring during the rewinding process.
During a rewinding operation in which the thread is preferably pulled off the spinning head by means of a rotating thread balloon overhead, the yarn tension, starting from a relatively low value at the beginning of Kopsreise, increases sharply in the course of Kopsreise, wherein in the last third of the Kopsreise the yarn tensile forces if no effective countermeasures are taken, they increase to a multiple of the initial yarn tension, which greatly increases the risk of yarn breakage.
Since both yarn breakage and strongly fluctuating yarn tension forces adversely affect the quality of a cross-wound bobbin, various methods and devices have been developed in the past, which enable spinning cops to be unwound during the entire unwinding process with a nearly constant yarn tension.
Through the use of thread tensioners, for example, it has been possible to compensate for the thread tension that increases in the course of the cop trip in the case of spinning cops.

For this purpose, the thread tensioners are initially relatively strongly loaded for this purpose at the beginning of the cop travel of the spinning cop, and the contact pressure of the thread tensioners is successively reduced in the course of the cop trip according to the thread tension measured by the yarn tension sensors.
However, since the thread tensioners are fully opened at a certain point of the cop trip and then no influence on the thread tension by the thread tensioner is given, methods have been developed to ensure that occurring during Umspulvorganges yarn tension even after the complete Opening the thread tensioner can be kept below a critical range.

Such a method or a device is for example in the CH-PS 669 177 described.

In this known device, a control of the winding speed and thus also the thread withdrawal speed in dependence on the amount of residual thread on the spinning cop.
That is, in this device is initially wrapped at the beginning of Kopsreise with a relatively high winding speed, the winding speed at the end of Kopsreise but lowered significantly to a non-critical level.

With this known method, although it was possible to achieve a limitation of the yarn tension continuously increasing without corresponding measures during a cop travel and thus a significant reduction of the yarn breaks, the reduction of the winding speed during the last third of the cop travel leads to a relatively low average winding speed, which is with respect to the efficiency of such winder negative effect.

It is also known in this connection to monitor the hairiness of the yarn to be repulped during the winding process by means of a yarn cleaner and to reduce the winding speed when reaching or exceeding a limit of the hairiness.

Based on the aforementioned prior art, the present invention seeks to develop a method that makes it possible to produce on the jobs of ring spinning spinning frames, which are designed so that they have an optimal flow behavior during subsequent rewinding on the jobs of winding machines.

This object is achieved by a method as described in claim 1.

A ring spinning machine for carrying out the method according to the invention is the subject of claim 7.

Advantageous embodiments of the method and the ring spinning machine are described in the subclaims 2-6 and 8, respectively.

The inventive method in which the position and size of the winding to be produced on the jobs of a ring spinning machine spinning cops is determined by the fact that when rewinding at least one Spinnkopses on a job of a winder evaluates the Abspulverhalten the spinning cop, the result of the Transmitted ring spinning machine and processed by the control of the ring spinning machine to optimize the position of the winding, in particular has the advantage that it is ensured in spinning cops made such that it is not a significant during the entire coil travel, even if constantly wound at high winding speed Increase in the thread tension comes.
In other words, spinning cops produced in this way can be continuously rewound on the work stations of the winding machines at a very high winding speed, without the risk of an increased occurrence of yarn breakages.

As described in claim 2, it is provided in an advantageous embodiment that in the production of new spinning cops on the jobs of ring spinning machines, the emergence of problem areas in the winding, which make themselves negatively noticeable during the winding process, is prevented by the fact that in the production of this new spin cops on the work stations of the ring spinning machine, the starting height of the winding is raised depending on the determined when unwinding at least one Spinnkopses values so far that the new spinning cops no longer have recognized as problematic winding area.

As set forth in claims 3 and 4, it is provided in a preferred embodiment that is taken into account as a parameter for determining the optimum position of the winding on the work stations of ring spinning machines effective when unwinding a Spinnkopses thread tension.
After a game change on a ring spinning machine, for example, first with at least one of the new on the ring spinning machine fabricated spinning cops performed on one of the work stations of a winder rewinding while detecting the yarn tension of the current thread with the present at the workstation yarn tension sensor.
The yarn tension force sensor thereby establishes a constant increase in the yarn tension to be compensated by the yarn tensioner, whereby a limit value is exceeded for the end of the yarn despite a completely open yarn tensioner, which is evaluated by the control device of the winding machine as the beginning of a problem zone of the winding of the spinning cop ,
This means that in the control device of the winding machine, the yarn tension values determined during the rewinding process are processed such that the optimal position and size of the winding of the spinning cop is calculated by the control device, whereby the optimum position of the winding from yarn section to yarn section may vary and depends, for example, on the yarn material and / or yarn size.
In order to avoid the occurrence of such a problem zone in the subsequent spinning spinning on the spinning machine, the values determined by the controller of the winder are transmitted to the control device of the ring spinning machine and the spinning program of the ring spinning machine corrected so that the position of the windings of the newly produced spinning cops is optimized.

Instead of the yarn tension can, however, as a parameter for determining the optimum position of the winding of the newly produced on the work stations of ring spinning machines spinning cops, as described in claims 5 and 6, during the unwinding Considering the spinnopops adjusting hairiness of the yarn.
Since the hairiness of the yarn when unwinding a Spinnkopses towards Kopsende towards clearly increases, can be detected by the control device of the winder as the beginning of a problem zone of the winding of the spinning cop in a relatively simple manner, the exceeding of a limit of Garnhaarigkeit Formation can be avoided in subsequent to the ring spinning machine to be produced spinning cops by correcting the position of the winding of the spinning cops in their production on the ring spinning machine.

According to claim 7, the ring spinning machine for carrying out the method according to the invention in an advantageous embodiment, an interface over which the control device of the ring spinning machine, which controls the position of the winding of the spinning cops, can be supplied with data from a controller of a winder during unwinding at least of a spinning cop were determined.
The data supplied via this interface, provided by the control device of the winder data are processed in the control device of the ring spinning machine and implemented to correct the spinning program.
That is, the data introduced via the interface are used by the control device of the ring spinning machine for optimizing the position and size of the winding of newly produced spinning cops.

As set forth in claim 8, it can further be provided in an advantageous embodiment that the ring spinning machine is directly connected to the winding machine via the interface.

In such an advantageous embodiment, in particular in so-called compound systems, the control device of the ring spinning machine is connected directly to the control device of the winding machine, so that the values determined during the winding process are transmitted immediately to the control device of the ring spinning machine and directly from this during the production of the new spinning cops can be implemented so that they no longer have the identified during the unwinding problem zone.

The method according to the invention or the textile machines required for carrying out the method will be explained below with reference to the exemplary embodiments illustrated in the drawings.

Fig.1

eine Seitenansicht einer Arbeitsstelle einer Spulmaschine,

Fig.2

eine Vorderansicht auf zwei Arbeitstellen einer Ringspinnmaschine,

Fig.3A

einen nach konventionellem Verfahren gefertigten Spinnkops mit Problemzone,

Fig.3B

einen nach erfindungsgemäßem Verfahren gefertigten Spinnkops ohne Problemzone.

It shows:

Fig.1

a side view of a workstation of a winder,

Fig.2

a front view of two work stations of a ring spinning machine,

3A

a conventionally manufactured spinning cop with problem zone,

3B

a spinning cop manufactured according to the inventive method without problem zone.

In FIG. 1 is schematically shown in side view, the job 2 a winder 1.

As is known, the spinning heads 3 produced on a ring spinning machine are rewound to large-volume cheeses 5 on the work stations 2 of such winding machines 1.

The cheeses 5 are after their completion by means of a (not shown) automatically operating service unit, preferably a cheese changer, handed over to a machine-length cheese package conveyor 7 and transported to a machine end side Spulenverladestation or the like.
Such winding machines 1 generally also have a logistics device in the form of a bobbin and tube transport system 6, in which, on transport plates 11, the spinning cops 3 or empty tubes circulate.
Of the sleeve transport system 6 are in Fig.1 only the Kopszuführstrecke 24, the reversibly driven
Storage section 25, one of the leading to the jobs 2 transverse transport sections 26 and the sleeve return path 27 shown.

The individual jobs 2 also have various facilities that ensure the proper operation of these jobs 2.
One of these devices is, for example, the winding device 4, which, as usual, has a coil frame 8 movably mounted about a pivot axis 12, in which the cross-wound bobbin 5 is held rotatably. In the in Fig.1 illustrated embodiment, the cross-wound bobbin 5 during the winding operation also with its surface on a driven by an electric motor support and pressure roller 9, which carries the cheese 5 via frictional engagement.

For traversing the thread 16 during the winding process a Fadenchangiereinrichtung 10 is provided.

In the exemplary embodiment, the thread traversing device 10 has a finger thread guide 13, which, acted upon by an electromechanical drive 14, traverses the thread 16 between the end faces of the cross-wound bobbin 5.
The drive 14 of the thread-changing device 10, like the electric motor of the drive support and pressure roller 9, is connected via control lines to the workstation computer 28, which in turn is connected via a bus connection 29 to the central control unit 30 of the winding machine 1.
The central control unit 30 may also, as in Fig.1 indicated to be connected via a connection 60 to an interface 61 of a ring spinning machine 40.

The individual jobs 2 also have, as known and therefore only hinted at, various devices which are also connected via appropriate control lines to the workstation computer and ensure proper winding operation of the jobs 2. Such jobs 2 have, for example, a splicing device 19, a thread tensioner 20, a yarn cleaner 21, a paraffining device 22, a thread cutting device 23, a yarn tension sensor 31 and a lower thread sensor 32. In addition, such work stations 2 are equipped with a suction nozzle 17 and a gripper tube 18.

In Fig.2 are shown schematically in front view two jobs of a ring spinning machine 40.

The jobs are identified by reference numerals 41A and 41B.
As is known, such ring spinning machines 40 have, on each of their longitudinal machine sides, a stationary spindle bank 42 in which spinning spindles 43 are arranged at a pitch t, which are driven in the exemplary embodiment by means of a tangential belt 44.
Above the stationary spindle rail 42 a vertically adjustable mounted ring rail 45 is arranged, which, as indicated by the arrow 36A, by means of a (not shown) drive mechanism 'according to a predetermined spinning program is displaced.
In the ring rail 45 spinning rings 46 are installed, in which, during the spinning operation, acted upon by the running thread 50, ring rotors 47 rotate.

Furthermore, above the ring rail 45, as indicated by the arrows 36B and 36C, also defined in a vertically displaceably mounted manner, a bank 48 for the balloon constriction rings 49 and a bank 51 for the thread guides 52 are arranged.

The work stations 41A and 41B of the ring spinning machine 40 are also provided with a drafting system 53, between the lower rollers 54 and support rollers 55, the fiber sliver 56 to be spun is drawn, preferably from a flyer spool (not shown) suspended in an associated gate.

As in Fig.2 schematically illustrated, the ring spinning machine 40 further has an interface 61 which communicates with the control device 62 of the ring spinning machine 40, which controls the position of the winding of the spinning cops, is in communication.
Via the interface 61, for example via suitable data carriers, a wide variety of information, for example concerning the optimum position of the winding of the newly produced spinning cops, can be transmitted to the control device 62. Of course, via the interface 61, a direct connection of the control device 62 of the ring spinning machine 40 to the control device 30 of the winding machine 1 can be realized.
The connection line is in the FIGS. 1 and 2 designated by the reference numeral 60.

The FIGS. 3A and 3B show spinning cops 3, as they are manufactured, for example, at the work stations 41A and 41B of ring spinning machines 40 and rewound on the work stations 2 of winding machines 1 to cheeses 5.

The 3A shows a conventional spinning cop 3, that is a spinning cop, as it is known by the prior art. On a sleeve 33, a thread body 34 is fixed in the winding type "Kopswicklung" whose starting height, as indicated by the line 35, is very close to the sleeve foot.
In such spinning cops, approximately the lower third of the thread body 34 designated as a winding forms a so-called problem zone, that is to say a region in which, if no special measures are taken, the yarn tension increases greatly during the winding process.

The 3B shows a spinning cop 3 according to the invention, in which the starting height 35 for creating the winding 34 is significantly spaced from the sleeve foot.

Such trained spinning cops 3 have not only when unwinding on a job of a winder the advantage that they have no problem zone in which to avoid thread breaks during Umspulprozesses must be worked with a significantly reduced Umspulgeschwindigkeit, but also offer advantages in their production on the job of a ring spinning machine.
That is, for spinning heads with a relatively high winding does not need, as for example in the 3A Spinning jacks 3 are commonly used, after the start and in a large part of the lower Spinnkopsbereichs initially worked with reduced spinning speed, because due to the Spinnkopsbereich in this large thread balloon otherwise there is a risk of yarn breakage, but such spinning cops can be spun immediately at full working speed.

The relatively high start height 35 and the overall relatively high arrangement of the winding 34 on the spinning head sleeve 33 has the consequence that the starting at the start of the spinning thread balloon is relatively short, which makes it possible to operate the ring spinning machine immediately with full spinning speed ,

Claims (8)

Method for producing spinning cops, whose winding arranged on a coping sleeve has a position and size predetermined by the spinning program of a ring spinning machine,
characterized,
in that the position and size of the winding of the spinning cops to be produced on work stations of ring spinning machines is determined by evaluating the unwinding behavior of the spinning cop when rewinding at least one spinning cop on a work station of a winder, transmitting the result to the ring spinning machine and controlling the ring spinning machine to optimize the spinning frame Location of the winding is processed. A method according to claim 1, characterized in that in spinning cops the emergence of problem areas in the winding is prevented by the fact that depending on the unwinding of at least one spinning cop on a workstation of a winder determined values in the production of spinning cops on work stations of ring spinning machines, the starting height the winding of the spinning cops is raised. A method according to claim 1 or 2, characterized in that as a parameter for determining the optimum position of the winding to be produced on the jobs of ring spinning machines spinning cops, the effective when drawing a Spinnkopses on a job of a winder Fadenzugkraft is taken into account. A method according to claim 3, characterized in that detected during the Abspulvorganges of Spinnkopses the yarn tension by means of a yarn tension sensor and the exceeding of a limit value is evaluated by a control device of the winder as the beginning of a problem zone of the winding of the spinning cop. A method according to claim 1 or 2, characterized in that as parameters for determining the optimum position of the winding to be produced on jobs of ring spinning machines spinning cops taking into account when unwinding a spinning cop on a workstation of a winder hairiness of the yarn. A method according to claim 5, characterized in that during the Abspulvorganges the Spinnkopses the hairiness of the yarn is detected by means of a yarn cleaner and the exceeding of a limit value is evaluated by a control device of the winder as the beginning of a problem zone of the winding of the spinning cop. Ring spinning machine for carrying out the method according to one of the preceding claims, characterized in that the ring spinning machine (40) has an interface (61) via which a control device (62) of the ring spinning machine (40) which controls the position of the winding of the spinning cops, can be supplied with data, which were determined by a control device (30) of a winder (1) during the unwinding of at least one spinning cop. Ring spinning machine according to claim 7, characterized in that the control device (62) of the ring spinning machine (40) via the interface (61) with the control device (30) of the winder (1) is connected.

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