EP2420466B1 - Method of operating a workstation of a spooling station - Google Patents

Description

The invention relates to a method for operating a workstation according to the preamble of claim 1.

In connection with the operation of work stations of automatic packages, the use of yarn splicing devices for the pneumatic joining of yarns has long been known and described in detail in various patents.

With such yarn splicing devices, two yarn ends produced after a winding interruption, for example after a yarn breakage or a controlled cleansing cut, can again be pneumatically reconnected so that an almost yarn-like joint results.

For this purpose, the so-called upper thread that has accumulated after a Spulunterbrechung on the surface of a held in the creel of a job cross-cheese, picked up by means of a workstation's own suction nozzle and inserted into the splice channel of the splicing prism of Fadensleißvorrichtung.

Almost at the same time, the so-called bobbin thread is also picked up by a discharge bobbin positioned in an unwinding position and also inserted into the splicing channel of the splicing prism, where upper and bobbin threads are finally connected pneumatically by a gripper tube.

In order for the resulting yarn compound has a nearly yarn-like appearance and also approximately the same yarn strength, the two thread ends must be exactly cut to length, properly prepared and neatly spliced pneumatically. That is, such Fadensleiißvorrichtungen not only need to be equipped with thread clamping and cutting devices, but also have a splicing head, which is equipped with pneumatically actuated holding and Auflöseröhrchen and a pneumatically acted splicing prism.

Since different yarn materials can be processed on the workstations of such automatic packages that often make quite different demands both in terms of their preparation and with respect to the splicing process, in the known thread splicing devices, the holding and Auflöseröhrchen and the splice channel containing splice prism are interchangeable set in / on the splicing head ,

That is, the holding and Auflöseröhrchen are, such as in the DE 100 58 211 A1 represented secured by a cover plate, interchangeably mounted in receiving bores of a manifold body and thereby connected via the mounting holes to a compressed air line.

On the cover sheet, in turn, by a, in the DE 100 58 211 A1 unspecified bolt is fixed to the manifold body, the splicing prism is attached by means of another bolt, the splice channel is also connected to a compressed air line.

When in practice in use Fadensleiißvorrichtungen the distributor body, which is surrounded by a Fadenleitbügel, attached via two screwed on its back bolt to a receiving device which is also connected by bolts to the splicer of the Fadensleiißvorrichtung.

Such trained Fadensleiißvorrichtungen have proven in practice many times, however, have the disadvantage that the costs necessary in a batch change effort, a proper conversion of Fadensleiißvorrichtungen concerning relatively expensive and thus time-consuming designed.

In order to always be able to ensure proper thread connections even with a new yarn section, it is often necessary to tune the Fadenspleißvorrichtungen the workstations of the textile machine to the now present yarn material.

For this purpose, the thread splicing devices usually have to be equipped with new thread treatment elements (holding and dissolving tubes and splicing prism) that meet the requirements of the new yarn material.

Since in particular the holding and Auflöseröhrchen are not replaceable with built-in splice head and the mounting screws with which the splice head is attached to a receiving device, accessible only from the back, so far, the splicer housing is first screwed from the winding unit housing, then the splice head supporting receiving device remove associated with compressed air lines from the splicer housing. After loosening the cover plate then the old holding and Auflöseröhrchen could be taken out of the manifold housing and replaced by holding and Auflöseröhrchen that better fit the new yarn material.

In this context, the splicing prism was usually replaced by a more suitable splicing prism and the compressed air lines were re-connected to the holding and dissolution tubes and to the splicing prism.

Subsequent to this conversion, the splice head, which was then adapted to the new yarn material, could then be re-attached to the splicer housing by means of the receiving device and the spit housing could again be fixed to the winding head housing.

The above-described work is not only relatively cumbersome and time consuming, but also involve the risk that it comes to the installation of incorrect components or improper installation of components during the conversion, which in both cases has a very negative effect on subsequent thread connections ,

In addition, during the reconstruction of the yarn splicing devices always at least a part of the jobs of the cheese winder are out of service, which usually leads to not insignificant production losses.

Furthermore, by the DE 32 39 848 A1 a thread splicer known in which in a one-piece, that is complex, block-shaped body in X-shaped arrangement, a yarn splice channel and associated holding and Auflöserinnen are incorporated.

At the centrally arranged, in cross-section Fadensleiißkanal in which opens a Einblasdüse, on both sides in each case a holding channel and a Auflöserinne connected, wherein the Aufladerinnen also Einblasdüsen have, which are positioned depending on the direction of rotation of the threads to be processed. That is, the one-piece block-shaped bodies are each designed either for the processing of threads with S-twist, or for the processing of threads with Z-twist.

A disadvantage of these known Fadensleiißvorrichtungen is that in the provision of two alternatively usable block-shaped bodies only the direction of rotation of the yarns to be spliced can be considered. However, material changes, Garnfeinheitsunterschiede etc. also require the use in particular of different splice channels and different resolving devices. In order to take this into account, in each case different block-shaped bodies, that is to say a total of a large number of such, would have to be relatively expensive to manufacture and thus costly block-shaped bodies are provided.

The thread splicing devices according to DE 32 39 848 A1 therefore could not convince and found no entrance into the practice.

The DE 35 18 315 A1 discloses a yarn splicing apparatus having a splice head having a splicing prism and holding and dissolution tubules. The splice head is equipped with a fastening device embodied as a screw bolt and is designed such that it corresponds with permanently installed compressed air lines and a receiving device fixed on the splicer housing. According to the DE 35 18 315 A1 should be an exchange of pneumatic holding and Auflöseröhrchen to adapt to the respective Garndrehungsrichtung be avoided. For this purpose, openings of the tubes can be connected to flow channels which can be alternately flowed through by compressed air and point in two different directions. How to make necessary when changing the yarn material replacement of the splicing prism and the holding and Auflöseröhrchen is not disclosed.

Starting from yarn splicing devices of the type described above, the invention has for its object to develop a method which makes it possible to simplify the necessary in the case of a lot change at the Fadenspleißvorrichtungen conversion measures.

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

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

The method according to the invention for operating a working station of a cheese winder has the advantage that, in the case of a batch change, the splicing head, which is designed as a preassembled structural unit, can be quickly and easily removed from a receiving device arranged on the splicer housing and the compressed air lines installed there by means of a fastening device accessible from the front can be removed and replaced by a new splice head, whose pre-mounted thread treatment elements, such as splicing prism and holding and Auflöseröhrchen are tuned to the present Garnpartie. In this way, the necessary conversion work can be simplified so that this work can be performed by less qualified operators, which also significantly reduces the amount of time required and thus the machine downtime of the cheese winder is minimized.

In addition, can be largely ensured with the method according to the invention that when rebuilding the Fadensleißvorrichtung not accidentally combined thread treatment elements or thread processing elements are incorrectly installed, which would later affect the creation of thread connections very negative.

To carry out the method according to the invention, it is advantageously provided that the splicing head constructed as a preassembled, yarn-specific configured unit is equipped with a fastening device and designed so that the installed splicing head fits exactly with permanently installed compressed air lines and one at the splicer housing

Receiving device corresponds, so that a quick and easy replacement of the splice head is possible.

This means that it represents for the operator no major effort, after a batch change splicing heads that no longer meet the requirements of a new yarn section to replace splice heads, the thread treatment elements, such as splicing prism and holding and Auflöseröhrchen are optimally matched to the now present Garnpartie ,

Consequently, with the yarn splicing device according to the invention, optimum working results can always be ensured in a simple manner, without the need for replacement work, which has been hitherto customary, requiring relatively extensive and time-consuming conversion work.

The fastening devices for fixing the splice heads can have different embodiments.

For example, the fastening devices may be formed by bolts as is preferred in practice.

That is, the splice head is fixed by bolts, each pass through a arranged in the cover plate and the manifold body bore and correspond with a threaded hole in the receiving device. Such a screw connection is a proven in mechanical fastener.

As a further advantageous embodiment, however, a positive clip connection can also be used.

Such a clip connection has the advantage that it can be released or fixed very quickly, which further reduces the time required for the conversion. Very short conversion times can also be realized if a magnetic coupling is used. In such a magnetic coupling, for example, in the distributor body of the splicing head, which is made of plastic, permanent magnets are embedded, which correspond to the ferromagnetic recording device.

On the one hand a magnetic coupling ensures a secure fixing of the splicing head to the receiving device, on the other hand, if necessary, a removal of the splicing head is relatively easy.

The two fastening devices last described also have the advantage that they can be handled without tools.

Further details of the invention are explained below with reference to an embodiment shown in the drawings.

Fig. 1

in Seitenansicht eine Arbeitsstelle eines Kreuzspul-automaten mit einer erfindungsgemäß ausgebildeten Fadenspleißvorrichtung zur Durchführung des erfindungs-gemäßen Verfahrens,

Fig. 2

eine perspektivische Ansicht der erfindungsgemäßen Fadenspleißvorrichtung mit einem demontierten Spleißkopf, der als vormontierte Baueinheit ausgebildet ist,

Fig. 3

den Spleißkopf gemäß Fig.2 als Explosivzeichnung.

It shows:

Fig. 1

a side view of a workstation of a cheese winding with a yarn splicing device according to the invention for carrying out the inventive method,

Fig. 2

a perspective view of the yarn splicing device according to the invention with a disassembled splice head, which is designed as a preassembled unit,

Fig. 3

the splice head according to Fig.2 as an explosive drawing.

In FIG. 1 schematically is a side view of a generally designated by the reference numeral 1 cheesemakers fabricating textile machine, in the embodiment, a cross-winding machine, shown.

As is known, have such automatic packages 1 between their (not shown) Endgestellen a plurality of similar jobs 2, in this case winding units, on. On these jobs 2 spinning cops 9, which were produced for example on a (not shown) ring spinning machine, rewound to large-volume cheeses 15, which are handed over after completion by means of an automatically operating (also not shown) service unit on a machine-length cheese package transport 21.

In the exemplary embodiment, the cross-winding machine 1 has a machine-own logistics facility in the form of a cop- and Sleeve transport system 3, of which in FIG. 1 only the Kopszuführstrecke 4, the reversibly driven storage section 5, one of the leading to the winding units 2 transverse transport sections 6 and the sleeve return path 7 are shown.

In this cop and tube transport system 3 run, positioned on transport plates 8 in a vertical orientation, spin cops 9 or empty tubes to.

The delivered spinning cops 9 are rewound in the unwinding position AS, which is located in each case in the area of the transverse transport lines 6 at the jobs 2, to large-volume cheeses 15.

For this purpose, the individual jobs 2 have, as is known and therefore only indicated, various facilities which ensure the proper functioning of these jobs.

These devices known per se are, for example, a winding station computer 29, a suction nozzle 12 which is movable about a pivot axis 16, a vacuumable gripper tube 11 which is movable about a pivot axis 13 and a pneumatic thread splicer 10.

The pneumatic thread splicer 10 is set back slightly with respect to the regular yarn path and fixed with its splicer housing 31 on the winding head housing 33.

Such thread splicing devices 10 have, as known per se and subsequently with reference to FIG Figures 2 and 3 explained in more detail, in addition to a splicing prism 19 with pneumatically actable splice channel 20 via an upper and a lower thread clamping and cutting device 23A and 23B, a pivotally mounted yarn feeder and a likewise pivotally mounted Lid member closing the splice channel 20 during the splicing process.

The splicing prism 19 is in turn arranged on a distributor body 17, in the pneumatically actuated holding and Auflöseröhrchen 26 A and 26 B are embedded.

The cross-wound bobbin 15 is freely rotatably held in the bobbin frame 28 of a winding device 24 during the winding process and lies, for example, with its surface on a grooved drum 14, which carries the cross-wound bobbin 15 via frictional engagement and also for proper traversing of the bobbin 15 during the winding operation running thread.

The FIG. 2 shows a perspective view of a splicer housing 31 to which by means of bolts 43, a receiving device 30 is fixed, the threaded holes 38 for fixing a splice head 18 has.

In the receiving device 30 compressed air lines 27 are fixed, the end pieces correspond in the assembled state with corresponding holes in the manifold body 17 of the splicing head 18.

That is, in the installed state of the splice head 18 are the compressed air lines 27 on the one hand with opening into the splice channel 20 of the splicing prism 19 injection openings and on the other hand with the receiving holes 42 for the holding and Auflöseröhrchen 26A, 26B and are connected via corresponding lines, in the example Solenoid valves are switched on, connected to a compressed air source.

As in Fig.2 illustrated, the splice head 18 is formed as a preassembled unit, which can be fixed by means of bolts 36 as a whole to the receiving device 30.

The bolts 36 engage in the assembled state each one of the holes 45 in the cover plate 22, one of the holes 37 in the manifold body 17 and are screwed into one of the threaded holes 38 of the receiving device 30.

As in Figure 3 illustrated, the splice head 18 has a distributor body 17, the receiving bores 42 for holding and Auflöseröhrchen 26 A, 26 B, a compressed air bore 46 for supplying the splicing prism 19 and holes 37 for the screw-36 formed in the present embodiment fastening means 44 has.

On the distributor body 17 also separating plates 34 are attached, which support the thread guide when inserting the thread ends in Fadensleiißvorrichtung.

The holding and Auflöseröhrchen 26 A, 26 B, which are specially adapted to a particular yarn material, are secured in the mounting holes 42 by a cover plate 22, which also fixes the resting on the holding and Auflöseröhrchen 26 A, 26 B O-rings 41.

The cover plate 22 is in turn connected by means of a bolt 39 to the manifold body 17.

On the cover plate 22, with the interposition of an O-ring 40, a splicing prism 19 is fastened, whose druckluftbeaufschlagbarer splice 19 is also each yarn-specific, that is, it is, for example, the shape of the splice and / or the arrangement and training opening in the splice Splice air nozzles matched to a specific yarn material.

At the splicing prism 19 Fadenleitbleche 35A, 35B are further arranged, which ensure that the yarn ends to be connected properly slide into the splice channel 20 of the splicing prism 19.

• Wie bekannt, wird während des Spulbetriebes der laufende
  Faden durch einen in Figur 1 lediglich schematisch dargestellten Fadenreiniger überwacht, der jede Fadenunregelmäßigkeit detektiert und an den Spulstellenrechner 29 meldet. Der Spulstellenrechner 29 initiiert daraufhin sofort einen definierten Fadenschnitt. Das heißt, durch eine Fadenschneideinrichtung wird der laufende Faden in einen Oberfaden und einen Unterfaden getrennt. Der Oberfaden läuft auf die Oberfläche der mit einem Bremsmoment beaufschlagten Kreuzspule 15 auf, während der Unterfaden in der Regel in einem Fadenspanner gehalten bleibt.

Function of the thread splicing device according to the invention:

• As is known, during the winding operation of the current
  Thread through one in FIG. 1 monitors only shown thread cleaner, which detects each Fadenunregelmäßigkeit and reports to the winding station computer 29. The winding station computer 29 then immediately initiates a defined thread cut. That is, by a thread cutting device of the current thread is separated into an upper thread and a lower thread. The upper thread runs on the surface of the applied with a braking torque cheese 15, while the lower thread is usually kept in a thread tensioner.

To clean the defective thread piece and to create a new thread connection of the accrued to the cheese 15 upper thread is then resumed. That is, the suction nozzle 12 is pivoted upwardly and positioned with its mouth druckdruckbeaufschlagbaren in the region of the surface of the cheese 15.
At the same time, the cross-wound bobbin 15 is slowly rotated in the unwinding direction.

As soon as the suction nozzle 12 has picked up the upper thread, the defective piece of thread is separated out and disposed of by means of a thread cutting device (not shown) arranged in the region of the suction nozzle 12.

Subsequently, the now faultless upper thread is threaded through the suction nozzle 12 in the splice channel 20 of the splicing prism 19 of the yarn splicing device 10, wherein the thread is also guided by the separating plates 34 and the Fadenleitbleche 35 A and 35 B. The suction nozzle 12 also positions the upper thread 31 in the upper thread clamping device 23A and between the tools of the lower thread cutting device 23B. At the same time or a little later to take up the upper thread, the lower thread is also picked up.

That is, the gripper tube 11 fetches the lower thread, which is usually determined by a controlled thread cut in a thread tensioner on the thread tensioner and also puts him in the splice 20 of the splicing prism 19 of the yarn splicing device 10 a.

Like the upper thread, the lower thread is also threaded into an associated lower thread clamping device 23B and an upper thread cutting device 23A.
As soon as the two threads are inserted into the splice channel 20 and mechanically fixed in the thread clamping devices 23A, 23B, compressed air is applied to the holding and dissolving tubes 26A, 26B by appropriate actuation of a valve and the threads are cut to length by the thread cutting devices 23A, 23B.

The free yarn ends of upper and lower thread are sucked into the holding and Auflöseröhrchen 26 A, 26 B and prepared by the via tangential holes in the holding and Auflöseröhrchen 26 A, 26 B incoming compressed air in accordance with regulations pneumatically. That is, the thread ends of upper and lower thread sucked into the holding and Auflöseröhrchen 26A, 26B are largely freed from their Garndrehung and short fibers.

The prepared yarn ends are then, as known and therefore neither illustrated nor explained in more detail, pulled by a so-called loop puller in the splice 20 of the splicing prism 19 of the yarn splicing device 10 and pneumatically connected there. In other words, the winding station computer 29 controls a solenoid valve via a signal line in such a way that splicing air is blown into the splicing channel 20 via one of the compressed air lines, which swirls the fibers of the two thread ends initially arranged largely parallel to one another and thereby produces a nearly yarn-like thread connection ,

Claims (1)

1. Method for operating a workstation (2) of an automatic cross-winding machine (1), which has a thread splicing device (10) with a splicing head (18), which has a distributor body (17) with connection holes for compressed air lines (27) and receiving holes (42) for exchangeable holding and opening tubes (26A, 26B) as well as an exchangeable splicing prism (19), the holding and opening tubes (26A, 26B), which are fixed in the distributor body (17) by means of a cover plate (22), and the splicing prism (19), which has a splicing channel (20), which can be loaded with compressed air, in each case being configured yarn-specifically, characterised in that during a batch change, the splicing head (18), which is configured as a preassembled assembly with a fastening mechanism (44), which is accessible from the front, for fastening to a receiving mechanism (30) of the workstation, is removed as whole from a receiving mechanism (30), which is arranged on the splicer housing (31), and the compressed air lines (27) and is replaced by a new splicing head (18), the thread handling elements of which, such as the splicing prism (19) and holding and opening tubes (26A, 26B), are each individually matched to the present yarn batch.

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