EP3802389B1 - Automatic ring spinning system and method for automatically operating same - Google Patents

Description

AREA OF EXPERTISE

The present invention is in the field of ring spinning. It relates to an automatic ring spinning installation and a method for its automatic operation, according to the independent patent claims.

STATE OF THE ART

A ring spinning installation usually includes a ring spinning machine and a winding machine.

The ring spinning machine has a large number of spinning positions. At each spinning position, roving is pulled off a roving spool, stretched, twisted (spun) and wound onto a cop (yarn spool) as yarn. Systems for monitoring the operation of the spinning positions, e.g. B. for detecting thread breaks or "creeping spindles" (ie spindles that work at a speed below the set machine speed) are known. Such spinning monitoring systems typically measure the rotational speed of the respective ring traveler (e.g. US-4,222,657 A ) or the yarn (e.g. WO-2014/022189 A1 ). The USTER ^® SENTINEL ring spinning optimization system , which is described in the brochure "USTER ^® SENTINEL - The ring spinning optimization system", Uster Technologies AG, 2016, belongs to the first category. The USTER ^® SENTINEL ring spinning optimization system creates a bobbin build-up report in which, among other things, the average number of yarn breaks and the average rotational speed are graphically displayed as a function of the position along a longitudinal axis of a bobbin. The cop build report is output to an operator on a screen.

After production, the bobbins are transported from the ring spinning machine to a winding machine. Cop tracking systems are known which make it possible to assign a cop in the winding machine to the spinning position on which it was produced. The assignment can be made, for example, by means of an identification carrier on the cop tube (e.g. US-4,660,370 A ) or on a bobbin plate (caddy) that transports the bobbin (e.g. DE-42'09'203 A1 ), take place.

The winding machine has a large number of winding positions. At each winding position, several bobbins are rewound onto a cross-wound bobbin one after the other. The purpose of rewinding is to produce large spools of yarn that can be transported and used efficiently. During rewinding, the properties of the yarn are monitored and compared with specified quality criteria. If the quality criteria are not met, the faulty area can be removed from the yarn. So-called yarn clearing systems are known for this purpose, e.g. B. from the WO-2012/051730 A1 .

DE-43'06'095 A1 discloses a method and a device for controlling a networked spinning plant. The spinning plant comprises a ring spinning machine, an automatic operating system assigned to the ring spinning machine and a winding machine linked to the ring spinning machine with a yarn clearer. It is equipped with a cop tracking system. Information is exchanged to optimize the spinning plant. The operating machine not only carries out operating operations, but also collects information on the status of the spinning positions and yarn breakages in the individual bobbins. The winding machine or its yarn clearer can determine via the bobbin tracking system that a specific spindle of the ring spinning machine is always producing bad yarn.

EP-3'305'953 A1 discloses a yarn winding system with a spinning machine and an automatic winding machine. The spinning machine is provided with a monitoring device for generating spinning information and a transmission unit for sending the spinning information to the winding machine. The winder is provided with a receiving unit for receiving the spinning information and a controller for controlling the operation of the winder based on the spinning information received by the receiving unit.

DE-10'2015'004'305 A1 relates to a method for operating an interconnected system comprising at least one ring spinning machine and at least one winding machine. The total thread length wound onto the cops is determined, and the cops are fed to the winding units as a function of the total thread length determined. Yarn breaks on the bobbins can be taken into account when distributing the bobbins to the winding positions in order to distribute splices evenly on the cheeses.

the DE-199'18'780 A1 suggests connecting the ring spinning machine to a test station. In this, the yarns are automatically checked for hairiness and the bobbins are automatically sorted depending on the test result. For one and the same end product, only bobbins with yarns without differences in hairiness are used.

According to the EP-0'392'278 A1 pass the bobbins on bobbin carriers a converter that connects at least one ring spinning machine and at least one winding machine. In the transfer area, the bobbin carriers equipped with bobbins are assigned data relating to different yarn qualities. Mixed bobbins with different qualities are coded and passed to the appropriate areas of the winding machine after the transfer unit.

PRESENTATION OF THE INVENTION

It is an object of the present invention to increase the productivity and/or the profitability of an automatic ring spinning installation. Another task is to increase the quality of the yarn bobbins produced by a ring spinning plant. Another task is to reduce quality costs in the textile manufacturing process downstream of the ring spinning plant.

These and other objects are achieved by the method and the automatic ring spinning installation as defined in the independent patent claims. Advantageous embodiments are specified in the dependent patent claims.

The invention is based on the idea of determining values of a parameter characteristic of the operation of the spinning position during spinning, in particular during the winding of the cop, automatically assigning them to the cop and taking them into account in an automatic decision about feeding the cop to one of the winding positions . The automatic assignment takes place on the basis of an identification of a point in time when the cop was wound up and an identification of the spinning station at which the cop was wound up. Bobbins that encountered problems during manufacture or winding can thus be discarded before rewinding. They can be discarded as scrap or rewound into inferior quality yarn spools.

The method according to the invention is used for the automatic operation of a ring spinning installation which contains a ring spinning machine with a large number of spinning positions for spinning yarn and a winding machine with a large number of winding positions for rewinding the yarn. Yarn is spun at one of the spinning positions and wound up into a cop. For the spinning position, values of a parameter characteristic of the operation of the spinning position are determined during the winding of the cop and stored as spinning data. The spinning data are assigned to the cop. The bobbin is set down from the spinning position. The spinning data assigned to the cop are taken into account in an automatic decision about feeding the cop to one of the winding stations after it has been set down. The parameter included in the spinning data that is characteristic of the operation of the spinning position includes a ring traveler speed. An identification of the point in time at which the cop was wound up and an identification of the spinning position are automatically assigned to the cop. The spinning data are automatically assigned to the bobbin based on the identification of the time at which the bobbin was wound up and the identification of the spinning position.

In one embodiment, the spinning data, the identification of the time at which the cop was wound up and the identification of the spinning position are stored in a relational database. The identification of the point in time at which the bobbin was wound up and the identification of the spinning position are used in the relational database as a key for identifying the spinning data to be assigned to the bobbin. An identification carrier can be assigned to the cop, identification data of the identification carrier can be stored in the relational database and the identification of the time of the Winding of the cop and the identification of the spinning position in the relational database can be used as a key for identifying both the spinning data to be assigned to the cop and the identification data of the identification carrier. Preferably, the decision about feeding a first cop is adopted for several subsequent cops, which after the first cop were wound up at the same spinning position as the first cop, without taking their spinning data into account.

• Wird der Kops einer der Spulstellen zugeführt?
• Welcher der Spulstellen wird der Kops zugeführt?
• Wann wird der Kops einer der Spulstellen zugeführt?

In one embodiment, the decision is made on at least one of the following questions:

• Is the bobbin fed to one of the winding units?
• Which of the winding units is the bobbin fed to?
• When is the bobbin fed to one of the winding units?

In one embodiment, the cop is sorted out after it has been set down and is not fed to any of the winding units, at least during a waiting period.

In one embodiment, at least two classes of spinning data that are similar to one another are formed. The decision is made for each of the at least two classes and a result of the decision is assigned to the respective class. The bobbin is classified into one of at least two classes according to the stored spinning data. After it has been set down, the cop is dealt with according to the result assigned to the relevant class. Preferably, at each of the winding stations, the yarn is rewound from the cop onto a yarn package, and cops classified in the same class are sequentially fed to one of the winding stations so that the yarn wound on these cops is rewound onto a single yarn package. The cops classified in the same class can be temporarily stored after being set down before they are fed to the winding unit.

In one embodiment, the parameter which is characteristic of the operation of the spinning position and which is comprised by the spinning data is additionally selected from the following set: number of thread breaks per unit of time, air temperature, air humidity.

The automatic ring spinning installation according to the invention includes a ring spinning machine with a large number of spinning stations for spinning yarn and for winding the yarn onto a cop in each case. It also includes a spinning monitoring system for monitoring the operation of the spinning positions, with a spinning sensor at each of the spinning positions for measuring a spinning variable and a spinning monitoring control unit connected to the spinning sensor, which is set up to receive values of the spinning variable from the spinning sensor of a spinning position during the winding of a cop , from which values of a parameter characteristic of the operation of the spinning position are determined and stored as spinning data. The ring spinning plant includes a depositing device for depositing the bobbins from the spinning positions. It also includes a winding machine with a plurality of winding stations for rewinding the yarn from a respective cop onto a yarn bobbin. In addition, the ring spinning installation contains a feed system, controlled by a feed control unit, for feeding the cops deposited by the depositing device to the winding stations and an allocation system for allocating the spinning data to the associated cop. The feed control unit is connected to the spinning monitoring control unit and set up to make a decision about feeding a respective cop to one of the winding positions, taking into account the spinning data assigned to the cop by the allocation system. The spinning monitoring control unit is set up to determine values of a ring traveler speed as a parameter that is characteristic of the operation of the spinning position and to store it as spinning data. The assignment system is set up to assign an identification of a point in time at which the cop was wound up and an identification of the spinning position on which the cop was wound up to the cop and to assign the spinning data to the cop on the basis of the identification of the point in time at which the cop was wound up and the identification of the spinning position .

In one embodiment, the mapping system includes a relational database. The relational database is set up to store the spinning data, the identification of the time at which the cop is wound up and the identification of the spinning position, and to use the identification of the time at which the cop is wound up and the identification of the spinning position as a key for identifying the spinning data to be assigned to the cop . The assignment system can be set up to assign an identification carrier to the cop, identification data of the identification carrier in to store the relational database and to use the identification of the time of winding the bobbin and the identification of the spinning position in the relational database as a key for identifying both the spinning data to be assigned to the bobbin and the identification data of the identification carrier. The assignment system is preferably set up to take over the decision about feeding a first cop for a plurality of subsequent cops which, after the first cop, were wound up at the same spinning position as the first cop, without taking their spinning data into account.

In one embodiment, the ring spinning installation additionally includes a sorting station for accommodating those cops that are sorted out by the feed control unit and are not fed to any of the winding stations, at least during a waiting period.

In one embodiment, the spinning monitoring control unit is set up to additionally determine values of the parameter characteristic of the operation of the spinning position from the following set and store them as spinning data: number of thread breaks per unit of time, air temperature, humidity.

Thanks to the invention, cops which have encountered problems during manufacture or winding can be discarded. This saves cuts by yarn clearers on the winding machine, which increases the efficiency of the winding machine and ultimately the overall productivity of the automatic ring spinning system. The invention also reduces the risk of yarn defects getting onto the yarn package. It thus increases the quality of the yarn bobbins produced by the automatic ring spinning system. The invention also offers the possibility of specifically producing bobbins of several different quality classes, with the bobbins having a homogeneous quality level within a quality class. Depending on the quality class, the yarn bobbins can be sold at different prices for different further uses, which increases the profitability of the ring spinning plant. In the textile manufacturing process downstream of the ring spinning plant, quality costs are reduced through the use of yarn bobbins with a homogeneous quality, because less during further processing of the yarn bobbins (e.g. in weaving or knitting). Problems arise and the textile end product has fewer defects and irregularities.

LISTING OF DRAWINGS

Figur 1

zeigt schematisch eine erfindungsgemässe Ringspinnanlage.

Figur 2

illustriert anhand eines Flussdiagramms einen Teil einer Ausführungsform des erfindungsgemässen Verfahrens.

Figuren 3-5

illustrieren anhand von schematischen Diagrammen Teile von Ausführungsformen des erfindungsgemässen Verfahrens.

Figur 6

illustriert anhand eines Flussdiagramms einen Teil einer Ausführungsform des erfindungsgemässen Verfahrens.

Figur 7

stellt schematisch eine relationale Datenbank zur Verwendung im erfindungsgemässen Verfahren als Tabelle dar.

The invention is explained in detail below with reference to the drawings.

figure 1

shows schematically a ring spinning installation according to the invention.

figure 2

1 illustrates part of an embodiment of the method according to the invention using a flowchart.

Figures 3-5

use schematic diagrams to illustrate parts of embodiments of the method according to the invention.

figure 6

1 illustrates part of an embodiment of the method according to the invention using a flowchart.

figure 7

schematically represents a relational database for use in the method according to the invention as a table.

CARRYING OUT THE INVENTION

figure 1 shows schematically an automatic ring spinning installation 1 according to the invention. The ring spinning installation includes a ring spinning machine 2 and a winding machine 3.

The ring spinning machine 2 has a large number of spinning stations 21 . Yarn is spun from roving at each spinning position 21 by means of the known ring spinning process and wound up to form what is known as a cop 91 . The ring spinning machine 2 is equipped with a spinning monitoring system 4 for monitoring the operation of the spinning positions 21, e.g. B. for detecting thread breaks or "creeping spindles". The spinning monitoring system 4 contains a spinning sensor 41 at each of the spinning stations 21. The spinning sensor 41 measures a spinning variable. Each spinning sensor 41 is connected to a spinning monitoring control unit 43 via a wired or wireless first data line 42 . The spinning sensor 41 sends values of the spinning measurement variable to the spinning monitoring control unit 43 via the first data line 42. The spinning monitoring control unit 43 receives the values. She determines from this for at least two different times during the winding of the cop 91 values of a parameter characteristic of the operation of the spinning position 21 and stores the determined values as spinning data. The parameter characteristic of the operation of the spinning station 21 includes a ring traveler speed. Examples of other parameters that are characteristic of the operation of the spinning position 21 are a number of thread breaks per unit of time, an air temperature and an air humidity.

The full cops 91 produced at the same time are simultaneously deposited ("doffed") by the ring spinning machine 2; For this purpose, the ring spinning installation 1 is equipped with a settling device, which, however, is not shown in the drawings for the sake of simplicity. After being set down, the cops 91 are transported to the winding machine 3, which in figure 1 with dashed arrows 22 is indicated.

The winding machine 3 has a large number of winding stations 31 . At each winding unit 31, yarn 92 is successively wound from a plurality of cops 91 onto a yarn package 93, e.g. B. a cheese, rewound. The winding machine 3 can be equipped with a yarn monitoring system 5 for monitoring properties of the yarn 92. The yarn monitoring system 5 contains a yarn sensor 51 at each of the winding positions, which is connected to a yarn monitoring control unit 53 via a wired or wireless second data line 52 . The yarn monitoring system 5 can e.g. B. be designed as a yarn cleaner system, wherein each yarn sensor 51 can be assigned a yarn cutting unit that removes impermissible yarn defects from the yarn 92.

Normally, a cop 91 is automatically fed to one of the winding units 31 after it has been set down by the ring spinning machine 2, which in figure 1 with dashed arrows 34 is indicated. The cops 91 are fed to the winding units 31 by an automatic feed system which is controlled by a feed control unit 33 . The feed control unit 33 can be an independent unit or can be combined with a control unit of the winding machine 3 .

The feeding control unit 33 is connected to the spinning monitor control unit 43 . The connection can be made via a wired or wireless third data line 62 .

In the embodiment of figure 1 along the third data line 62 are three further devices 45, 6, 55, which receive data transmitted via the third data line 62, process them if necessary and send them on. These are not necessary for the present invention and are only briefly described below.

In one embodiment, the ring spinning installation 1 contains a central control and evaluation device 6. The central control and evaluation device 6 is connected to the spinning monitoring control unit 43 and to the yarn monitoring control unit 53 via the third data line 62. The central control and evaluation device 6 receives data from the spinning monitoring control unit 43 and/or processes it from the yarn monitoring control unit 53, controls the ring spinning installation 1 or parts thereof and/or outputs information to an operator. For this purpose, it is preferably connected to an input unit and/or an output unit, via which the operator can make inputs or receive outputs. In the embodiment of figure 1 is a mobile device 61, e.g. B. a mobile phone that communicates wirelessly with the central control and evaluation device 6, drawn as an input and output unit. Alternatively or additionally, other input units known per se, such as e.g. B. a computer keyboard and output devices such. B. a computer screen can be used.

In one embodiment, the ring spinning installation 1 contains a plurality of spinning monitoring systems 4 on one or more ring spinning machines 2 whose spinning monitoring control units 43 are connected to a spinning expert system 45 . The spinning expert system 45 is set up to receive data from the spinning monitoring control units 43 , to process them and to output them in a suitable form, and to control the spinning monitoring control units 43 . It is in turn connected to the central control and evaluation device 6 .

In one embodiment, the ring spinning installation 1 contains a plurality of yarn monitoring systems 5 on one or more winding machines 3 whose yarn monitoring control units 53 are connected to a yarn expert system 55 . The yarn expert system 55 is set up to receive data from the yarn monitoring control units 53 , to process them and to output them in a suitable form, as well as to control the yarn monitoring control units 53 . It is in turn connected to the central control and evaluation device 6 .

The ring spinning installation 1 according to the invention contains an allocation system (not shown as an independent unit) for allocating the spinning data to the associated cop 91. Based on the figure 7 one possibility of assignment will now be described. The mapping system may include a relational database stored in figure 7 is shown schematically as table 700. The assignment system assigns the cop 91 an identification of a point in time when the cop 91 was wound up and an identification of that spinning position 21 on which it was produced. An identification of a point in time when the cop 91 is unwound can e.g. B. be a so-called Doff number, ie a natural number that uniquely identifies a setting ("Doff") of cops 91 produced at the same time from the ring spinning machine 2 and is increased by one for each subsequent Doff. The Doff numbers are in a first column 701 of the table. 700 listed. The spinning position 21 on which the cop 91 was produced can be identified by means of a spinning position number. The spinning position numbers are listed in a second column 702 of table 700. A Doff number and the associated spinning position number together uniquely identify a line in the table 700 so that they can be used as a so-called key in the database. this is in figure 7 indicated by a frame 705 around the two key columns 701, 702.

Furthermore, the assignment system assigns an identification carrier to the cop 91 and also stores identification data of the identification carrier in the relational database. For this purpose, the allocation system can include a cop tracking system, which is known per se and does not need to be discussed in detail here. such as B. in the EP-3'305'953 A1 described, each cop 91 can be transported from the ring spinning machine 2 to the winding machine 3 on a bobbin plate that is provided with an RFID label. When leaving the ring spinning machine 2, the RFID label is written with identification data that uniquely identify the Doff number and the spinning position number. The identification data is listed in a third column 703 of the table 700, e.g. B. as natural numbers, each of which uniquely identifies a cop 91, at least during its feeding to the winding units 31.

Finally, the associated spinning data are listed in a fourth column 704 of the table 700, for example the number of yarn breaks per hour.

Table 700 should therefore be read as follows: During doffing 0001, there were 0.67 thread breaks per hour at spinning position 001L; the cop so produced is identified as "14377".

Let us now return to figure 1 return. The functions of the assignment system can be fulfilled by the spinning monitoring control unit 43, the spinning expert system 45, the central control and evaluation device 6, the yarn expert system 55, the yarn monitoring control unit 53, the feed control unit 33 and/or by other units.

• Wird der Kops 91 einer der Spulstellen 31 zugeführt?
  Ein Kops 91, dessen Spinndaten darauf hindeuten, dass er an einer schlecht funktionierenden Spinnstelle 21 aufgewickelt wurde, kann als Ausschuss ausgesondert werden, ohne jemals einer Spulstelle 31 zugeführt zu werden. Zu diesem Zweck kann die Ringspinnanlage 1 eine Aussonderstation 35 beinhalten, welcher die "schlechten" Kopse zugeführt werden.
• Welcher der Spulstellen 31 wird der Kops 91 zugeführt?
  Klassen von Kopsen 91 mit unterschiedlichen Spinndaten werden örtlich voneinander getrennt. Die Spulstellen 31 werden in mehrere, bspw. zwei, Gruppen unterteilt. Kopse 91 mit "besseren" Spinndaten werden einer ersten Gruppe von Spulstellen 31 zugeführt, während Kopse 91 mit "schlechteren" Spinndaten einer zweiten Gruppe von Spulstellen 31 zugeführt werden.
• Wann wird der Kops 91 einer der Spulstellen 31 zugeführt?
  Klassen von Kopsen 91 mit unterschiedlichen Spinndaten werden zeitlich voneinander getrennt. Kopse 91 mit "besseren" Spinndaten werden zu einer anderen Zeit umgespult als Kopse 91 mit "schlechteren" Spinndaten. Eine oder mehrere Aussonderstationen 35 können zur Zwischenlagerung von solchen Klassen von Kopsen 91 dienen, die erst später zum Umspulen vorgesehen sind. Die so zwischengelagerten Kopse 91 werden zum gegebenen Zeitpunkt der Spulmaschine 3 zugeführt, was mit einem gestrichelten Pfeil 36 angedeutet ist.

According to the invention, the feed control unit 33 is set up to make a decision about feeding a respective cop 91 to one of the winding units 31, taking into account the spinning data assigned to the cop 91 by the assignment system. The decision is preferably made on at least one of the following questions:

• Is the cop 91 fed to one of the winding units 31?
  A cop 91 whose spinning data indicate that it was wound on a malfunctioning spinning unit 21 can be rejected as rejects without ever being fed to a winding unit 31. For this purpose, the ring spinning installation 1 can contain a separation station 35 to which the "bad" cops are fed.
• Which of the winding units 31 is the cop 91 fed to?
  Classes of cops 91 with different spinning data are spatially separated from one another. The winding units 31 are divided into several groups, for example two. Cops 91 with "better" spinning data are fed to a first group of winding units 31, while cops 91 with "worse" spinning data are fed to a second group of winding units 31.
• When is the cop 91 fed to one of the winding units 31?
  Classes of cops 91 with different spinning data are separated in time. Bobbins 91 with "better" spinning data are rewound at a different time than bobbins 91 with "worse" spinning data. One or more sorting stations 35 can be used for the intermediate storage of those classes of cops 91 that are intended for rewinding later. the like that intermediately stored cops 91 are fed to the winding machine 3 at the given point in time, which is indicated by a dashed arrow 36 .

These and other aspects of the invention are discussed below with reference to FIG Figures 2-5 explained in more detail.

In one embodiment, the spinning monitoring control unit 43 determines the spinning data for the individual cops 91. For each cop 91, the spinning data, the Doff number and the spinning position number are stored in a relational database (cf. figure 7 ) saved. The database can be located in the spinning monitoring unit 43, in the spinning expert system 45, in the evaluation device 6, in the yarn expert system 55, in the yarn monitoring control unit 53, in the feed control unit 33, in another computing unit or distributed over several of the units mentioned. Two classes of similar spinning data are specified, namely permissible spinning data for properly functioning spinning positions 21 and impermissible spinning data for insufficiently functioning spinning positions 21. Each cop 91 is classified into one of the two classes according to the spinning data assigned to it. In the example of figure 7 cops 91 with two or fewer thread breaks per hour can be classified as permissible, so that z. B. the cop 91 with the Doff number 0001 from the spinning position 003L is not permitted. Each cop 91 is transported from the ring spinning machine 2 to the winding machine 3 on a bobbin plate which is provided with an RFID label. When leaving the ring spinning machine 2, the RFID label is written with identification data, which can be clearly identified by means of the Doff number and the spinning position number. The identification data are also stored in the relational database (cf. figure 7 ) saved. When the cop 91 arrives in the winding machine 3, the identification data are read from the RFID label. The corresponding spinning data are read from the database, with the doff number and the spinning position number being used as keys for identifying the spinning data. If the respective spinning data turns out to be impermissible, the feed control unit 33 feeds the relevant cop 91 classified as impermissible to the sorting station 35, otherwise to one of the winding units 31. All cops 91 classified as permissible are thus rewound on the winding machine 3, while all of them are classified as impermissible classified cops 91 are sorted out in the sorting station 35. This ensures that the yarn 92 wound onto the yarn spools 93 is of consistently good quality.

The empty cop tubes are removed from the winding machine 3 and fed back to the ring spinning machine 2, which in figure 1 with dashed arrows 32 is indicated.

figure 2 FIG. 12 uses a flowchart to illustrate how decisions about feeding cops 91 are made in one embodiment of the method according to the invention. In this embodiment, three classes of spinning data similar to each other are specified. Cops 91 belonging to a first class are to be rewound first. According to this, cops 91 belonging to a second or a third class are to be rewound at the same time, but in different groups of winding units 31.

The spinning data of a cop 91 removed 201 from the ring spinning machine 2 are first examined 202 to determine whether they belong to the first class of spinning data. If so, the bobbin 91 is fed 211 to any of the winding units 31 at which there is a need for bobbins 91 at that moment. There the cop 91 is rewound 212 onto a yarn spool 93. When several first-class cops 91 have been rewound onto the yarn spool 93, so that the yarn spool 93 contains the prescribed quantity of yarn 92, then the yarn spool 93 is completed 213 and is removed from the Winding unit 31 removed 214. It contains only first-class yarn 92. If the yarn package 93 is not yet completed 213, another first-class cop 91 is fed 21I to the winding unit 31 in question.

If the spinning data of a deposited cop 91 does not belong to the first class 202, then the cop 91 is initially fed 203 to the selection station 35. There it is temporarily stored until all first-class cops 91 have been rewound. After all first-class cops 91 have been rewound, a class change 204 takes place on the winding machine 3. The cops 91 temporarily stored in the selection station 35 are now transported again to the winding machine 3 (arrow 36). The spinning data of a cop 91 transported 205 in this way to the winding machine 3 are then examined 206 to determine whether they belong to the second class of spinning data. If so, the cop 91 is fed 221 to a winding unit 31 which belongs to a first group of winding units 31 . There the cop 91 is rewound 222 onto a yarn spool 93. When several second-rate cops 91 have been rewound onto the yarn spool 93, so that the yarn spool 93 contains the prescribed amount of yarn 92, the yarn spool 93 is completed 223 and is taken from the winding station 31 removed 224.

It contains second-class yarn 92. If the yarn package 93 is not yet completed 223, another second-class cop 91 is fed 221 to the relevant winding station 31.

If the spinning data of a cop 91 transported 205 from the selection station 35 to the winding machine 3 do not belong 206 to the second class of spinning data, they belong to the third class. In this case, the cop 91 is fed to a winding unit 31 231 which belongs to a second group of winding units 31 . There the cop 91 is rewound 232 onto a yarn spool 93, which after its completion 233 contains third-class yarn 234.

The rewinding 222, 232 in the first and the second group of winding units 31 can take place simultaneously on the same winding machine 3 (cf. figure 5 ). Alternatively, depending on their respective spinning data, the cops 91 can either be fed to a first winding machine, which only winds around second-class yarn 222, or to a second winding machine, which only winds around third-class yarn 232.

In the figure 2 illustrated embodiment is just an example. Two, three or more classes can be specified. All classes can be rewound simultaneously or sequentially. One of the classes can definitely be discarded without being rewound later. the Figures 3-5 illustrate such variants. Using schematic diagrams, they show how cops 91 (not shown) can be fed to the winding units 31 in three different embodiments of the method according to the invention. The diagrams of Figures 3-5 correspond to the lower right part of the figure 1 . Reference numerals 22, 34, 35 and 36 are used in FIGS Figures 3-5 with the same meaning as in figure 1 used; they were in the description of figure 1 explained so that they are not repeated here.

The embodiment of figure 3 largely corresponds to that of figures 1 and 2 . A cop 91 is transported from the spinning station 21 to the winding machine 3 after it has been set down, which is indicated by the arrow 22 . Depending on the spinning data assigned to the cop 91, the cop 91 is either fed to one of the winding stations 31 or to the sorting station 35. In this embodiment, initially only first-class cops 91 are fed to the winding units 31 (arrows 34; figure 2 : reference numeral 211), while all others Cops 91 are temporarily stored in the selection station 35 ( figure 2 : reference numeral 203). When all first-class cops 91 have been rewound, a class change takes place ( figure 2 : reference numeral 204). The cops 91 temporarily stored in the selection station 35 are transported again to the winding machine 3, which is indicated by the arrow 36. Thereafter, the second-class cops 91 are fed to the winding units 31, etc. (in contrast to the embodiment of FIG figure 2 , in which the second-class and third-class cops 91 are rewound simultaneously).

It can happen in practice that even a first-class cop 91 is not supplied to any of the winding units 31, e.g. B. because the end of the yarn 92 on this cop 91 was not found. In this case, the first-class cop 91 is again transported to the winding machine 3, which is indicated by an arrow 37; possibly the end of the yarn will be found in a second or further attempt. The same can be done with the second and higher class cops 91 after they have been transported to the winding machine 3 again. are (arrow 36).

In the embodiment of figure 4 the non-first-class cops 91, which have not been fed to any of the winding units 31, are fed either to the first separating station 35.1, to a second separating station 35.2 or to a reject station 38. Second-class cops 91 are stored in the first sorting station 35.1, which, after the first-class cops 91 have been rewound, are again transported to the winding machine 3 (arrow 36.1) and rewound there. In the second, optional sorting station 35.2, third-class cops 91 are stored, which, after the second-class cops 91 have been rewound, are transported to the winding machine 3 (arrow 36.2) and rewound there. Further (optional, not shown) sorting stations for third-class and higher-class cops can be provided. In the reject station 38 cops 91 are collected whose spinning data are so bad that they are not rewound. The scrap station 38 can be viewed as a special case of a reject station. In this embodiment, too, a return 37 of the first-class cops 91 that have not been rewound can be provided.

In the embodiments of Figures 3 and 4 the different classes of cops 91 are separated in time: the different classes of cops 91 are on the same winding units 31, but rewound one after the other. figure 5 shows, however, an embodiment with a local separation: the different classes of cops 91 are rewound at the same time, but on different groups of winding units 31. In doing so, e.g. B. a first-class cop 91 is fed to a winding unit from a first group 31.1 of winding units, while a second-class cop 91 is fed to a winding unit from a second group 31.2 of winding units. This corresponds to the procedure described in the lower right part of figure 2 is shown, but there for second-class or third-class cops 91. Cops 91 that are worse than second-class are collected in the reject station 38. As in the embodiments described above, in the embodiment of FIG figure 5 more than two classes of spinning data similar to each other are formed. The groups 31.1, 31.2 of winding positions, which bobbins 91 each wind around one of the classes, can be locally connected and separated from one another on a winding machine 3, can be distributed over several winding machines 3 or can be formed virtually on one or more winding machines 3, without being locally related.

The flowchart of figure 6 illustrates part of an embodiment of the method according to the invention. The assumption here is that a spinning station 21, at which a cop 91 with impermissible spinning data has been wound up, is defective or faulty and will continue to produce cops 91 with impermissible spinning data in the future. An identification of such a defective spinning station 21, for example its spinning station number, is stored separately.

For each 601 cop 91 removed from the ring spinning machine 2, the first question asked 602 is whether at least one spinning position 21 is already known and stored as a defective spinning position 21. If not, the spinning data of the cop 91 are checked 603 for their admissibility. If the spinning data are admissible, the cop 91 is fed 604 to one of the winding stations 31 and rewound there. Otherwise, the spinning position 21 at which the cop 91 was wound up is stored 606 as a defective spinning position 21 and the cop 91 is separated out as rejects 607.

On the other hand, if at least one spinning position 21 is already known and stored 602 as a defective spinning position 21, the question 605 is whether the cop 91 has been wound up at one of the known defective spinning positions 21. If so, the cop 91 can be discarded 607 as rejects without further examination of its spin data. This saves time and computational effort for an examination of the spin data. Only if the cop 91 has been wound up on a spinning position 21 that has previously functioned perfectly does its spinning data have to be checked for admissibility 603. If the spinning data prove to be impermissible, the spinning position 21 in question is saved as a defective spinning position 21 606 and the cop 91 set aside as a committee 607.

In the embodiment of figure 6 is for the sake of simplicity of a segregation 307 of the cop 91 speech. In addition or as an alternative to sorting out 307, a classification can take place, as was explained on the basis of the embodiments described above. It can be assumed that a spinning station 21, at which a cop 21 with second-rate spinning data has been wound up, will continue to produce cops 21 with second-rate spinning data in the future. Analogous assumptions can be made for third-class and higher-class spinning data and spinning positions 21 . With second-class and higher-class cops 91 from such spinning stations 21, one of the embodiments described above can be used. It is essential that a further examination of the spinning data of such bobbins 91 is not necessary here.

It is desirable to repair a defective spinning position 21 as quickly as possible in order to achieve the desired quality of the yarn produced and high productivity of the ring spinning installation 1. For this purpose, on the input and output unit 61 (see figure 1 ) a corresponding instruction can be issued to the operator. Alternatively, the central control and evaluation device can trigger an automatic repair of the defective spinning position 21.

Of course, the present invention is not limited to the embodiments discussed above. With knowledge of the invention, the person skilled in the art will be able to derive further variants which also belong to the subject matter of the present invention.

REFERENCE LIST

1

ring spinning plant

2

ring spinning machine

21

spinning position

22

Transport of bobbins from the ring spinning machine to the winding machine

3

Dishwasher

31

spool station

31.1,31.2

Groups of winding units

32

Feeding of empty cop tubes from the winding machine to the ring spinning machine

33

feed control unit

34

Feeding a bobbin to one of the winding units

35, 35.1, 35.2

rejection stations

36, 36.1, 36.2

Feeding of intermediately stored bobbins to the winding machine

37

return of cops

38

scrap station

4

spinning monitoring system

41

spinning sensor

42

first data line

43

Spinning Monitoring Control Unit

45

Spinning Expert System

5

yarn monitoring system

51

yarn sensor

52

second data line

53

yarn monitoring control unit

55

Yarn Expert System

6

central control and evaluation device

61

mobile device

62

third data line

9I

cop

92

yarn

93

thread spool

700

Table representing a relational database

701

Table column with Dof numbers

702

Table column with spinning position numbers

703

Table column with identification data

704

Table column with spinning data

705

Frames around key columns

Claims (16)

1. Method for automatically operating a ring spinning system (1) which comprises a ring spinning machine (2) having a plurality of spinning positions (21) for spinning yarn (92) and a winding machine (3) having a plurality of winding positions (31) for rewinding the yarn (92), wherein

   yarn (92) is spun at one of the spinning positions (21) and wound into a cop (91), for the spinning position (21), values of a parameter characteristic for the operation of the spinning position (21) are determined during the winding of the cop (91) and stored as spinning data,

   the spinning data are assigned to the cop (91),

   the cop (91) is doffed from the spinning position (21) and

   the spinning data assigned to the cop (91) are taken into account in an automatic decision on feeding the cop (91) after it has been doffed to one of the winding positions (31),

   characterized in that

   the parameter characteristic of the operation of the spinning site (21) comprised by the spinning data comprises a ring traveler speed,

   an identification of a point in time of the winding of the cop (91) and an identification of the spinning position (21) are automatically assigned to the cop (91) and

   the spinning data are automatically assigned to the cop (91) based on the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21).
2. The method according to claim 1, wherein

   the spinning data, the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21) are stored in a relational database and

   the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21) in the relational database are used as a key to identify the spinning data to be assigned to the cop (91).
3. The method according to claim2, wherein

   an identification carrier is assigned to the cop (91),

   identification data of the identification carrier are stored in the relational database and

   the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21) in the relational database are used as keys for the identification of both the spinning data to be assigned to the cop (91) and the identification data of the identification carrier.
4. The method according to one of the preceding claims, wherein the decision on feeding a first cop (91) is adopted for a plurality of subsequent cops (91) wound after the first cop (91) at the same spinning position (21) as the first cop (91) without taking into account their spinning data.
5. The method according to one of the preceding claims, wherein the decision is made on at least one of the following questions:

   • Is the cop (91) fed to one of the winding positions (31)?

   • The cop (91) is fed to which of the winding positions (31)?

   • When is the cop (91) fed to one of the winding positions (31)?
6. The method according to one of the preceding claims, wherein the cop (91) is sorted out after being doffed and is not fed to any of the winding positions (31) at least during a waiting period.
7. The method according to one of the preceding claims, wherein

   at least two classes of mutually similar spinning data are formed,

   for each of the at least two classes the decision is made and a result of the decision is assigned to the respective class,

   the cop (91) is classified into one of at least two classes according to the stored spinning data and

   the cop (91) is processed after doffing according to the result assigned to the respective class.
8. The method according to claim7, wherein at each of the winding positions (31) the yarn (92) is rewound from the cop (91) onto a yarn bobbin (93) and cops (91) classified in the same class are fed one after the other in time to one of the winding positions (31) in such a way that the yarn (92) wound on these cops (91) is rewound onto a single yarn bobbin (93).
9. The method according to claim8, wherein the cops (91) classified in the same class are temporarily stored after being set down before they are fed to the winding position (31).
10. The method according to one of the preceding claims, wherein the parameter characteristic of the operation of the spinning site (21) comprised by the spinning data is additionally selected from the following set: number of yarn breaks per unit of time, air temperature, air humidity.
11. Automatic ring spinning system (1), comprising

    a ring spinning machine (2) having a plurality of spinning positions (21) for spinning yarn (92) and for winding the yarn (92) onto a cop (91) each,

    a spinning monitoring system (4) for monitoring the operation of the spinning positions (21), having

    a spinning sensor (41) at each of the spinning positions (21) for measuring a spinning measured quantity, and

    a spinning monitoring control unit (43) connected to the spinning sensor (41), which is adapted to receive values of the spinning measured quantity from the spinning sensor (41) of a spinning position (21) during the winding of a cop (91), to determine therefrom values of a parameter characteristic for the operation of the spinning position (21) and to store them as spinning data,

    a set-down device for setting down the cops (91) from the spinning positions (21),

    a winding machine (3) having a plurality of winding positions (31) for rewinding the yarn (92) from a respective cop (91) onto a yarn bobbin (93),

    a feeding system controlled by a feed control unit (33) for feeding the cops (91) set down by the set-down device to the winding positions (31), and

    an assignment system for assigning the spinning data to the corresponding cop (91),

    wherein the feed control unit (33) is connected to the spinning monitoring control unit (43) and is adapted to make a decision on feeding a respective cop (91) to one of the winding positions (31) taking into account the spinning data assigned to the cop (91) by the assignment system,

    characterized in that

    the spinning monitoring control unit (43) is adapted to determine values of a ring traveler speed as the parameter characteristic for the operation of the spinning position (21) and to store them as spinning data, and

    the assignment system is adapted for the purpose

    of assigning an identification of a point in time of winding of the cop (91) and an identification of the spinning position (21) on which the cop (21) was wound to the cop (21) and

    of assigning the spinning data to the cop (91) on the basis of the identification of the time of winding of the cop (91) and the identification of the spinning position (21).
12. The automatic ring spinning system (1) according to claim 11, wherein the assignment system contains a relational database which is adapted for the purpose of storing the spinning data, the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21), and
    using the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21) as a key to identify the spinning data to be assigned to the cop (91).
13. The automatic ring spinning system (1) according to claim12, wherein the assignment system is adapted for the purpose of
    assigning an identification carrier to the cop (91),
    storing identification data of the identification carrier in the relational database and using the identification of the point in time of winding of the cop (91) and the identification of the spinning position (21) in the relational database as a key for the identification of both the spinning data to be assigned to the cop (91) and the identification data of the identification carrier.
14. The automatic ring spinning system (1) according to one of claims 11, wherein the assignment system is adapted to adopt the decision on feeding a first cop (91) for a plurality of subsequent cops (91), which have been wound after the first cop (91) at the same spinning position (21) as the first cop (91), without taking into account their spinning data.
15. The automatic ring spinning system (1) according to one of claims11, additionally comprising a separating station (35, 35.1, 35.2, 38) for receiving such cops (91) which are sorted out by the feed control unit (33) and are not fed to any of the winding positions (31) at least during a waiting period.
16. The automatic ring spinning system (1) according to one of claims11, wherein the spinning monitoring control unit (43) is adapted to additionally determine values of the parameter characteristic for the operation of the spinning position (21) from the following set and to store them as spinning data: number of yarn breaks per unit time, air temperature, air humidity.

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