EP1331192B1 - Apparatus for pneumatically connecting the ends of yarns - Google Patents

Apparatus for pneumatically connecting the ends of yarns Download PDF

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Publication number
EP1331192B1
EP1331192B1 EP02025978A EP02025978A EP1331192B1 EP 1331192 B1 EP1331192 B1 EP 1331192B1 EP 02025978 A EP02025978 A EP 02025978A EP 02025978 A EP02025978 A EP 02025978A EP 1331192 B1 EP1331192 B1 EP 1331192B1
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EP
European Patent Office
Prior art keywords
splicing
holding
thread
opening
channel
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EP02025978A
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German (de)
French (fr)
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EP1331192A2 (en
EP1331192A3 (en
Inventor
Siegfried Schatton
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Oerlikon Textile GmbH and Co KG
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Saurer GmbH and Co KG
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Publication of EP1331192A3 publication Critical patent/EP1331192A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
    • B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
    • B65H69/063—Preparation of the yarn ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/319—Elastic threads

Definitions

  • the invention relates to a device for pneumatically connecting yarns, in particular elastane yarns, according to the preamble of claim 1.
  • Yarn splicing devices for the pneumatic joining of yarns have long been known in connection with winding machines and are described in detail in numerous patents, for example in DE 40 05 752 A1 or DE 44 20 979 A1.
  • the known yarn splicing devices have for this purpose corresponding thread clamping devices, thread cutting devices and so-called holding and Auflöserschreibchen. That is, the two thread ends are, while being threaded through the aforementioned handling elements in the splice, also positioned between the holding jaws of a thread clamping device and the cutting tool one of the thread cutting devices, the belonging to a thread end yarn handling devices are respectively arranged on opposite sides of the splice ,
  • both upper thread and lower thread are securely fixed in the associated thread clamping devices, the threads are cut to length by the corresponding thread cutting devices.
  • the cut thread ends are then sucked into the adjacent holding and Auflöserschreibchen and pneumatically prepared there. That is, the thread ends are first largely freed from their Garnwindung and short fibers removed.
  • the prepared thread ends are pulled by a so-called loop puller into the splice channel of the splicing prism so that they lie parallel to one another approximately at the same height in the splice channel, but have an opposite orientation.
  • An introduced via corresponding inlet holes in the splice air pressure then ensures a vortex of the initially substantially parallel fibers of the two yarn ends, with the result that a nearly yarn-like splice is formed.
  • elastane yarns which usually have a highly elastic core thread, which is surrounded for example by cotton fibers. Due to the highly elastic core thread, such elastane yarns tend to pull together strongly after a thread cut, that is, to curl strongly.
  • EP 1 118 570 A2 shows and describes a yarn splicing device which has an additional thread locking means in the form of a serrated sheet, in each case at the level of the holding and dissolving drums. These sheets, each fixing one of the thread ends are arranged approximately halfway between the actual thread clamping device and the associated holding and Auflöserschreibchen. This means that after the cutting of the thread ends by the thread cutting device resulting, free, tendency to curl thread length is approximately halved by the known locking means. With such a trained yarn splicing device, the number of successful splices in Elastangarnen could be somewhat increased, but the fundamental problem could not be eliminated.
  • DE 101 24 832 A1 also an embodiment is shown and described, in which the locking means are each positioned in the immediate vicinity of the associated holding and Auflöserschreibchen. With such an embodiment, it has been possible to significantly increase the number of successful splices in elastane yarns.
  • DE 34 05 304 A1 discloses a yarn splicing apparatus in which the splicing channel arranged in the splicing prism has, in addition to the customary compressed air injection openings, so-called flow channels.
  • the flow channels branch off laterally from the splice channel between the compressed air injection openings and the splice channel exits and are each connected to an injector device.
  • an injector device By means of this injector device, an air flow directed away from the splicing channel can be generated in the flow channels, which if necessary should ensure that the cut thread ends are sucked into the flow channels and for pneumatic preparation of the thread ends.
  • a disadvantage of these known Fadenspl dievorairesen is also that the flow channels are incorporated directly into the splicing prism, so that an individual adjustment of the flow channels to changing yarn parameters is very difficult and usually requires an exchange of the entire splicing prism.
  • replacement of the entire splicing prism is always necessary when, for example, the yarn count changes or when the yarn twist of the yarns to be processed changes, that is, when changing from Z-twist yarns to S-twist yarns.
  • the hollow body is rotatably mounted in a preparation unit.
  • the hollow body in this case has a connected to an annular channel Lucaseinströmbohrung that can be positioned by means of a tool so that the air flow can selectively, that is, depending on the rotation of the present yarn, either left or right-handed to flow.
  • the annular channel is sealed at the top by a seal, which in turn is defined by a rounded lid.
  • Fadensleiißvorraumen known in which the central axes of the Auflöserschreibchen are each arranged laterally offset with respect to the central longitudinal plane of the splice channel.
  • Fadensleiißvorraumen there is, especially in difficult yarns, such as elastane yarns that tend to curl, always the risk that the cut thread ends immediately after cutting, laterally past the Auflöserschreibchen be drawn unprepared in the splice.
  • holding tubes, as described in DE 33 26 966 A1 are not suitable due to their arrangement and design difficult to suck in yarns and to fix pneumatically.
  • the present invention seeks to provide a device for the pneumatic joining of yarns, which allows splicing of problematic yarns, such as elastane yarns, if necessary, and the holding and Auflöserschreibchen easily adaptable to changing yarn parameters are.
  • the device according to the invention has the particular advantage that the yarn ends of upper and lower thread, which are set in thread clamping devices, which are spaced apart from the splicing prism above and below the yarn splicing device, after their cutting by appropriate thread cutting devices, immediately in the immediate vicinity the holding and dissolving tube arranged in the splice channel are sucked in and additionally pneumatically fixed there. Due to the additional pneumatic fixation of the thread ends, for example, the typical curling of the thread ends is largely avoided in Elastangarnen and thus ensures a simple and secure way to create proper splices.
  • the funnel-like contour of the inlet opening of the holding and Auflöserschreibchen thereby ensures that even such difficult yarns are reliably sucked. Since the holding and Auflöserschreibchen are interchangeable set in holes of the splicing prism, anytime an adjustment of the holding and Auflöserschreibchen to the respective yarn parameters is possible, so that optimal preparation of the sucked yarn ends for the subsequent splicing process can be achieved without much effort. The necessary storage is limited to the holding and Auflöserschreibchen.
  • the funnel-like contour is part of a locking means, for example, secured by a readily accessible bolt, the associated holding and Auflöserschreibchen easily replaceable fixed in a bore of the splicing prism.
  • a locking means is relatively easy and inexpensive to produce, for example, as a deep-drawn sheet metal part
  • the holding and Auflöserschreibchen are installed so that the central axis of the holding and Auflöserschreibchens each extending at the level of Spllechkanalgroundes.
  • the yarn ends fixed in the thread clamping devices are clamped centrally over the holding and Auflöserschreibchen, so that the thread ends are immediately applied to the full suction of the holding and Auflöserschreibchen, which is very beneficial to the reliability of the holding and dissolution tube.
  • both the injection ports arranged in the splice channel and the holding and Auflöserschreibchen are connected via pneumatic lines in the controllable valves are connected to a compressed air source in a preferred embodiment.
  • the valves for example, 2/2-way valves are connected via appropriate control lines to the winding station of the respective winding unit and can in this way be controlled defined without a large additional control effort is necessary. That is, if necessary, the opening times of the valve for the holding and Auflöserschreibchen and the opening times of the valve for the arranged in the splice channel injection openings can be precisely adjusted and optimally adapted if necessary.
  • FIG. 1 shows schematically in side view a work station 1 of a textile machine producing cross-wound bobbins, in the exemplary embodiment of a cheese winder.
  • Such textile machines usually have a plurality of such in series juxtaposed jobs.
  • spinning cops 2 which were prepared for example on (not shown) ring spinning machines, rewound to large-volume cheeses 13.
  • the workstations 1 are equipped for this purpose with various, schematically shown Fadenhandhabungs- and Fadenprüf sexualen and its own control device, a so-called winding station computer 5.
  • the withdrawn from Spinnkops 2 thread 3 runs on its way to the cheese 13, which is rotatably mounted in a coil frame 14 and during the winding operation frictionally via a so-called grooved drum 12 is driven, preferably by a take-off accelerator 4, a thread tensioner 6, a thread cleaner 8 with an associated Thread cutting device 9 and an optional paraffining device 10.
  • a suction nozzle 15 and a gripper tube 19 are also provided.
  • the suction nozzle 15, which handles the upper thread 31, in this case has a mouth druckdruckeaufschlagbare 16 and is limited to a pivot axis 17 rotatably mounted.
  • the rotatably mounted about a pivot axis 21 rotatably mounted gripper tube 19, which brings the lower thread 32 to the yarn splicing device 7, has a vacuum-pressurized suction port 20th
  • the thread splicing device 7 consists essentially of an air distributor block 24 arranged on the winding unit housing, on which a so-called splicing prism 25 is fixed by means of bolts 23.
  • the splicing prism 25 has, as usual, a splice channel 26, open into the compressed air injection openings 29.
  • the compressed air injection openings 29 are connected via a connected to the air distribution block 24 pneumatic line 18, in which a valve, for example, a 2/2-way valve 22, is connected to a compressed air source 11.
  • the directional control valve 22 is in turn also connected via a control line 27 to the winding station computer 5 of the relevant workstation 1.
  • each a holding and Auflöserschreibchen 33 and 34 are interchangeably fixed by a respective Arret istsstoff 53 having a funnel-like contour 52 and positioned so that the central axes 37 and 38 of the holding and Auflöserschreibchen 33 and 34 respectively at the level of Grundes 55 of the splice channel 26 are arranged and lie orthogonal to a median plane 45 of the splice 26.
  • the locking means 53 can be fixed for example by means of bolts 54 on the splicing prism 25.
  • the holding and Auflöserschreibchen 33 and 34 which, as usual at least one tangential bore 56 and 57 have, via a pneumatic line 35, in which a valve 36 is turned on, connected to the compressed air source 11, wherein the 2/2-way valve 36 is controlled via a control line 28 from the winding station 5 from.
  • thread guiding devices 39 and 40, thread clamping devices 43 and 44 and thread cutting devices 41 and 42 are also arranged on both sides of the splicing prism 25.
  • the running thread 3 is monitored by the thread cleaner 8 shown schematically in FIG. 1, which detects each thread irregularity and reports it to the spindle computer 5.
  • the Spultellenrechner 5 then initiates immediately a defined thread section. That is, by the thread cutting device 9, the traveling thread 3 is separated into an upper thread 31 and a lower thread 32. While the upper thread 31 runs onto the surface of the cross-wound bobbin 13 subjected to a braking torque, the bobbin thread 32 is usually held in the thread tensioner 6.
  • the lower thread 32 is also picked up. That is, the gripper tube 19 picks up the lower thread 32, which is usually fixed in the thread tensioner 6 after a controlled thread cut, on the thread tensioner 6 and places it as well into the splice channel 26 of the splicing prism 25 of the thread splicer 7. As the upper thread 31 and the lower thread 32 is thereby threaded into an associated lower thread clamping device 43 and an upper thread cutting device 42. Once the two threads 31 and 32 are inserted into the splice 26 and mechanically fixed in the thread clamping devices 43 and 44, respectively, by appropriate driving a valve 22, the holding and Auflöseraffchen 33, 34 acted upon with compressed air. Subsequently, the threads 31 and 32 are cut to length by the thread cutting devices 41 and 42, respectively.
  • the winding station computer 5 controls via the signal line 28 first the directional control valve 36 in the sense "open", so that in the region of the inlet openings 48 and 49 of the holding and Auflöserschreibchen 33 and 34 is present a relatively strong suction flow.
  • the thread cutting devices 41 and 42 are on the suction nozzle 15 and the gripper tube 19, first the disposed of cut yarn ends and at the same time the free yarn ends of upper thread 31 and lower thread 32 through the funnel-like contour 52 of the locking means 53 in the holding and Auflöserschreibchen 33 and 34, respectively.
  • the yarn ends of upper and lower thread 31, 32 are thereby pneumatically fixed and thus prevented from curling too much.
  • the yarn ends of upper and lower thread are also prepared in accordance with the regulations pneumatically. That is, the sucked into the holding and Auflöserschreibchen 33 and 34 thread ends of upper and lower thread are largely freed from their yarn twist and short fibers.
  • the prepared thread ends are then, as known and therefore neither illustrated nor explained in more detail, pulled by a so-called loop puller in the splice 26 of the yarn splicing device 7 and pneumatically connected there. That is, the Spulstellenrechner 5 controls via a signal line 27, the 2/2-way valve 22 so that over the pneumatic line 18 and the compressed air injection openings 29 splicing air is injected into the splice 26, which initially largely parallel arranged fibers of the two thread ends swirled together and thereby produces a thread connection.
  • the Injektorströmung in the holding and Auflöserschreibchen 33, 34 remains at least until the initiation of the first splice air burst is maintained in the splice 26.
  • the compressed air pulse 58 is connected to fix the thread ends in the holding and Auflöserschreibchen 33, 34, as indicated in Figure 4, at a time t 1 and remains until the later time t 3 stand.
  • the compressed air pulse 59 for almost yarn-like splicing of the two yarn ends is between times t 2 and t 4 at. That is, the compressed air pulse 58 for splicing the yarn ends and the compressed air pulse 59 for fixing the yarn ends in the holding and Auflöserschreibchen 33, 34 overlap in time.

Abstract

The pneumatic splicer to join together two yarn ends, and particularly elastane stretch yarns, has a splicing prism (25) with a splicing channel carrying compressed air. The exchangeable yarn holding and opening tubes (33,34), to prepare the yarn ends for splicing, are inserted into drillings (46,47) in the splicing prism, with their center axes intersecting the center longitudinal plane of the splicing channel. The entry openings (48,49) into the tubes, in a funnel-shaped contour (52), are each in the immediate vicinity of the two outlets (50,51) of the splicing channel (26), to give a trouble-free swing movement of the cut ends of the upper and lower yarns (31,32) into the tubes.

Description

Die Erfindung betrifft eine Vorrichtung zum pneumatischen Verbinden von Garnen, insbesondere von Elastangarnen, gemäß dem Oberbegriff des Anspruches 1.The invention relates to a device for pneumatically connecting yarns, in particular elastane yarns, according to the preamble of claim 1.

Fadenspleißvorrichtungen zum pneumatischen Verbinden von Garnen sind im Zusammenhang mit Spulmaschinen seit langem bekannt und in zahlreichen Patentschriften, zum Beispiel in der DE 40 05 752 A1 oder der DE 44 20 979 A1, ausführlich beschrieben.Yarn splicing devices for the pneumatic joining of yarns have long been known in connection with winding machines and are described in detail in numerous patents, for example in DE 40 05 752 A1 or DE 44 20 979 A1.

Mit diesen bekannten Fadenspleißvorrichtungen können zwei nach einem Fadenbruch oder einem kontrollierten Reinigerschnitt entstandene Fadenenden pneumatisch so verbunden werden, daß eine nahezu garngleiche Verbindungsstelle entsteht.
Das heißt, der sogenannte Oberfaden, der auf die Oberfläche der betreffenden Kreuzspule aufgelaufen ist, wird mittels einer Saugdüse aufgenommen und in den Spleißkanal des Spleißprismas der Fadenspleißvorrichtungen eingelegt. Nahezu gleichzeitig wird außerdem durch ein Greiferrohr auch der sogenannte Unterfaden zum Beispiel von einer in einer Abspulstellung positionierten Ablaufspule abgeholt und ebenfalls in den Spleißkanal eingelegt, wo Ober- und Unterfaden anschließend pneumatisch verbunden werden.With these known yarn splicing devices, two yarn ends produced after a yarn breakage or a controlled cleansing cut can be pneumatically connected so that an almost yarn-like joint results.
That is, the so-called upper thread, which has accumulated on the surface of the cross cheese concerned, is picked up by means of a suction nozzle and inserted into the splicing channel of the splicing prism of the thread splicing devices. Almost at the same time, the so-called bobbin thread is also picked up, for example, by a discharge bobbin positioned in an unwinding position and also inserted into the splice channel, where the upper and bobbin threads are then pneumatically connected.

Damit ein solcher Spleiß eine nahezu garngleiche Verbindung darstellt und annähernd Garnfestigkeit aufweist, müssen die beiden Fadenenden vorher exakt abgelängt und für den Spleißvorgang vorbereitet werden.In order for such a splice to represent a nearly yarn-like connection and to have approximately yarn strength, the two yarn ends must first be exactly cut to length and prepared for the splicing process.

Die bekannten Fadenspleißvorrichtungen weisen zu diesem Zweck entsprechende Fadenklemmeinrichtungen, Fadenschneideinrichtungen sowie sogenannte Halte- und Auflöseröhrchen auf.
Das heißt, die beiden Fadenenden werden, während sie durch die vorgenannten Handhabungselemente in den Spleißkanal eingefädelt werden, jeweils auch zwischen den Haltebacken einer Fadenklemmeinrichtung sowie dem Schneidwerkzeug einer der Fadenschneideinrichtungen positioniert, wobei die zu einem Fadenende gehörenden Fadenbehandlungseinrichtungen jeweils auf gegenüberliegenden Seiten des Spleißkanals angeordnet sind.The known yarn splicing devices have for this purpose corresponding thread clamping devices, thread cutting devices and so-called holding and Auflöseröhrchen.
That is, the two thread ends are, while being threaded through the aforementioned handling elements in the splice, also positioned between the holding jaws of a thread clamping device and the cutting tool one of the thread cutting devices, the belonging to a thread end yarn handling devices are respectively arranged on opposite sides of the splice ,

Wenn sowohl Oberfaden als auch Unterfaden sicher in den zugehörigen Fadenklemmeinrichtungen fixiert sind, werden die Fäden durch die entsprechenden Fadenschneideinrichtungen abgelängt.
Die abgelängten Fadenenden werden anschließend in das jeweils benachbarte Halte- und Auflöseröhrchen eingesaugt und dort pneumatisch vorbereitet.
Das heißt, die Fadenenden werden zunächst weitestgehend von ihrer Garndrehung befreit und Kurzfasern entfernt.
Im Anschluß daran werden die vorbereiteten Fadenenden durch einen sogenannten Schlaufenzieher so in den Spleißkanal des Spleißprismas gezogen, daß sie etwa auf gleicher Höhe parallel nebeneinander im Spleißkanal liegen, dabei jedoch eine entgegengesetzte Ausrichtung aufweisen.
Ein über entsprechende Einlaßbohrungen in den Spleißkanal eingeleiteter Druckluftstoß sorgt dann für eine Verwirbelung der zunächst im wesentlichen parallel liegenden Fasern der beiden Fadenenden, mit dem Ergebnis, daß ein nahezu garngleicher Spleiß entsteht.If both upper thread and lower thread are securely fixed in the associated thread clamping devices, the threads are cut to length by the corresponding thread cutting devices.
The cut thread ends are then sucked into the adjacent holding and Auflöseröhrchen and pneumatically prepared there.
That is, the thread ends are first largely freed from their Garndrehung and short fibers removed.
Following this, the prepared thread ends are pulled by a so-called loop puller into the splice channel of the splicing prism so that they lie parallel to one another approximately at the same height in the splice channel, but have an opposite orientation.
An introduced via corresponding inlet holes in the splice air pressure then ensures a vortex of the initially substantially parallel fibers of the two yarn ends, with the result that a nearly yarn-like splice is formed.

Das beschriebene Verfahren sowie die entsprechende Vorrichtung haben sich in der Praxis, zum Beispiel beim Spleißen reiner Baumwollgarne oder beim Spleißen von Mischungen aus Baumwollfasern und Synthetikfasern, durchaus bewährt.The method described and the corresponding device have proven in practice, for example when splicing pure cotton yarns or when splicing mixtures of cotton fibers and synthetic fibers, quite well.

Schwieriger gestaltet sich die Situation allerdings, wenn sogenannte Elastangarne verspleißt werden sollen, die in der Regel einen hochelastischen Kernfaden aufweisen, der zum Beispiel von Baumwollfasern umgeben ist.
Derartige Elastangarne haben aufgrund des hochelastischen Kernfadens das Bestreben sich nach einem Fadenschnitt stark zusammen zu ziehen, das heißt, sich stark zu kräuseln.However, the situation is more difficult when so-called elastane yarns are to be spliced, which usually have a highly elastic core thread, which is surrounded for example by cotton fibers.
Due to the highly elastic core thread, such elastane yarns tend to pull together strongly after a thread cut, that is, to curl strongly.

Wenn solche Elastangarne in einer der vorbeschriebenen Fadenspleißvorrichtungen verbunden werden sollen, tritt häufig das Problem auf, daß die Fadenenden aufgrund ihrer starken Kräuselneigung nicht in die Halte- und Auflöseröhrchen eingesaugt und entsprechend nicht vorbereitet werden können oder daß die Überlappung der Fadenenden innerhalb des Spleißkanals des Spleißprismas der Fadenspleißvorrichtungen ungenügend ist.
Beide Ereignisse führen in der Regel dazu, daß entweder kein Spleiß erstellt werden kann oder daß der Spleiß nicht den gestellten Qualitätsanforderungen entspricht.When such elastane yarns are to be joined in one of the above-described yarn splicing apparatuses, the problem frequently arises that the yarn ends can not be sucked into the holding and dissolving tubules due to their strong tendency to curl and can not be prepared accordingly, or if the overlap of the yarn ends within the splicing channel of the splicing prism the thread splicing devices is insufficient.
Both events usually lead to either no splice can be created or that the splice does not meet the quality requirements.

Um Elastangarne spleißen zu können, ist daher bereits vorgeschlagen worden, im Bereich des Spleißkanals beziehungsweise der Halte- und Auflöseröhrchen zusätzliche Arretierungsmittel anzuordnen, die die Fadenenden nach dem Ablängen durch die Fadenschneideinrichtungen fixieren.
Das heißt, die verhindern, daß sich die abgelängten Fadenenden zu sehr kräuseln können.In order to splice Elastangarne, it has therefore been proposed to arrange additional locking means in the region of the splice channel or the holding and Auflöseröhrchen, which fix the thread ends after cutting to length by the thread cutting devices.
That is, they prevent the cut ends of the thread from curling too much.

Die EP 1 118 570 A2 zeigt und beschreibt beispielsweise eine Fadenspleißvorrichtung, die jeweils in Höhe der Halte- und Auflöseröhrchen ein zusätzliches Fadenarretierungsmittel in Form eines gezackten Bleches aufweist.
Diese Bleche, die jeweils eines der Fadenenden fixieren, sind dabei etwa auf halber Strecke zwischen der eigentlichen Fadenklemmeinrichtung und dem zugehörigen Halte- und Auflöseröhrchen angeordnet.
Das bedeutet, die nach dem Ablängen der Fadenenden durch die Fadenschneideinrichtung entstehende, freie, zum Kräuseln neigende Fadenlänge, wird durch die bekannten Arretierungsmittel etwa halbiert.
Mit derartig ausgebildeten Fadenspleißvorrichtung konnte die Anzahl erfolgreicher Spleißverbindungen bei Elastangarnen zwar etwas erhöht werden, das grundsätzliche Problem konnte aber nicht beseitigt werden.EP 1 118 570 A2, for example, shows and describes a yarn splicing device which has an additional thread locking means in the form of a serrated sheet, in each case at the level of the holding and dissolving drums.
These sheets, each fixing one of the thread ends are arranged approximately halfway between the actual thread clamping device and the associated holding and Auflöseröhrchen.
This means that after the cutting of the thread ends by the thread cutting device resulting, free, tendency to curl thread length is approximately halved by the known locking means.
With such a trained yarn splicing device, the number of successful splices in Elastangarnen could be somewhat increased, but the fundamental problem could not be eliminated.

Diese Aussage trifft, wenigstens teilweise, auch auf die in der nachveröffentlichten DE 101 24 832 A1 beschriebene Fadenspleißvorrichtung zu.
Auch bei dieser Fadenspleißvorrichtung sind etwa in Höhe der Halte- und Auflöseröhrchen Arretierungsmittel für die Fadenenden angeordnet, durch die die Länge der abgelängten, zum Kräuseln neigenden Fadenenden etwa halbiert wird.
Die Arretierungsmittel gemäß DE 101 24 832 A1 sind dabei als unterdruckbeaufschlagbare Siebe ausgebildet, die die abgelängten Fadenenden auf ihrer Oberfläche pneumatisch fixieren.This statement applies, at least in part, also to the thread splicing device described in the subsequently published DE 101 24 832 A1.
Also in this yarn splicing device locking means for the yarn ends are arranged approximately at the level of the holding and Auflöseröhrchen, by which the length of the cut to length, tending to curl yarn ends is approximately halved.
The locking means according to DE 101 24 832 A1 are designed as a vacuum-pressurized screens that fix the cut ends of the thread on its surface pneumatically.

In der DE 101 24 832 A1 ist außerdem auch eine Ausführungsform dargestellt und beschrieben, bei der die Arretierungsmittel jeweils in unmittelbarer Nähe der zugehörigen Halte- und Auflöseröhrchen positioniert sind.
Mit einer solchen Ausführungsform ist es gelungen, die Anzahl der erfolgreichen Spleiße bei Elastangarnen deutlich anzuheben.In DE 101 24 832 A1 also an embodiment is shown and described, in which the locking means are each positioned in the immediate vicinity of the associated holding and Auflöseröhrchen.
With such an embodiment, it has been possible to significantly increase the number of successful splices in elastane yarns.

Die Fadenspleißvorrichtungen gemäß DE 101 24 832 A1 weisen allerdings den Nachteil auf, daß sie relativ aufwendig und damit kostenintensiv sind.The yarn splicing devices according to DE 101 24 832 A1, however, have the disadvantage that they are relatively complicated and therefore expensive.

Des weiteren ist durch die DE 34 05 304 A1 eine Fadenspleißvorrichtung bekannt, bei der der im Spleißprisma angeordnete Spleißkanal außer den üblichen Druckluft-Einblasöffnungen noch sogenannte Strömungskanäle aufweist.
Die Strömungskanäle zweigen dabei zwischen den Druckluft-Einblasöffnungen und den Spleißkanalausgängen seitlich vom Spleißkanal ab und sind jeweils an eine Injektoreinrichtung angeschlossen.
Mittels dieser Injektoreinrichtung kann in den Strömungkanälen eine vom Spleißkanal weggerichtete Luftströmung erzeugt werden, die im Bedarfsfall für ein Einsaugen der abgelängten Fadenenden in die Strömungskanäle und für ein pneumatisches Vorbereiten der Fadenenden sorgen soll.Furthermore, DE 34 05 304 A1 discloses a yarn splicing apparatus in which the splicing channel arranged in the splicing prism has, in addition to the customary compressed air injection openings, so-called flow channels.
The flow channels branch off laterally from the splice channel between the compressed air injection openings and the splice channel exits and are each connected to an injector device.
By means of this injector device, an air flow directed away from the splicing channel can be generated in the flow channels, which if necessary should ensure that the cut thread ends are sucked into the flow channels and for pneumatic preparation of the thread ends.

Da diese Strömungskanäle direkt vom Spleißkanal abzweigen, sind die Strömungskanäle hinsichtlich ihres Durchmessers allerdings sehr beschränkt.
Das heißt, der Durchmesser der Strömungskanäle muß, um eine ordnungsgemäße Funktion der Spleißvorrichtung zu gewährleisten, beispielsweise deutlich unter der Breite des entsprechenden Spleißkanals liegen.Since these flow channels branch off directly from the splice channel, however, the flow channels are very limited in terms of their diameter.
That is, the diameter of the flow channels must, for example, be well below the width of the corresponding splice channel to ensure proper functioning of the splicing device.

Aufgrund dieses relativ kleinen Durchmessers der Strömungskanäle haben sich die Fadenspleißvorrichtung gemäß DE 34 05 304 A1 in der Praxis, insbesondere wenn schwieriges, zum Beispiel relativ steifes Garn verarbeitet werden soll, als nahezu unbrauchbar erwiesen, da der geringe Durchmesser der Strömungskanäle das Einsaugen der üblichen Fadenschlaufe in den Strömungskanal verhindert.Because of this relatively small diameter of the flow channels, the thread splicer according to DE 34 05 304 A1 in practice, especially when difficult, for example, relatively stiff yarn to be processed, has proven to be almost unusable, since the small diameter of the flow channels sucking the usual thread loop prevented in the flow channel.

Nachteilig bei diesen bekannten Fadenspleißvorrichtungen ist außerdem, daß die Strömungskanäle direkt in das Spleißprisma eingearbeitet sind, so das eine individuelle Anpassung der Strömungskanäle an wechselnde Garnparameter sehr schwierig ist und in der Regel einen Austausch des gesamten Spleißprismas erfordert.
Bei der bekannten Fadenspleißvorrichtung wird beispielsweise stets ein Austausch des gesamten Spleißprismas notwendig, wenn sich beispielsweise die Garnnummer ändert oder wenn sich die Fadendrehung der zu verarbeitenden Garne ändert, das heißt, wenn von Garnen mit Z-Drehung auf Garne mit S-Drehung gewechselt wird.A disadvantage of these known Fadenspleißvorrichtungen is also that the flow channels are incorporated directly into the splicing prism, so that an individual adjustment of the flow channels to changing yarn parameters is very difficult and usually requires an exchange of the entire splicing prism.
For example, in the prior art yarn splicing apparatus, replacement of the entire splicing prism is always necessary when, for example, the yarn count changes or when the yarn twist of the yarns to be processed changes, that is, when changing from Z-twist yarns to S-twist yarns.

Das heißt, eine individuelle Anpassung der Halte- und Auslöseeinrichtung macht bei diesen bekannten Fadenspleißvorrichtungen eine große Lagerhaltung erforderlich.That is, an individual adjustment of the holding and release device makes in these known Fadensleiißvorrichtungen a large storage required.

Durch das US-Patent 4,492,076 ist außerdem ein Fadenauflöseröhrchen bekannt, dessen Hohlkörper drehbar in einem Vorbereitungsaggregat gelagert ist.
Der Hohlkörper weist dabei eine an einen Ringkanal angeschlossene Lufteinströmbohrung auf, die mittels eines Werkzeuges so positioniert werden kann, dass der Luftstrom wahlweise, das heißt in Abhängigkeit von der Drehung des vorliegenden Garnes, entweder links- oder rechtsdrehend einströmen kann.
Der Ringkanal ist nach oben durch eine.Dichtung abgedichtet, die ihrerseits durch einen gerundeten Deckel festgelegt wird.By the US Patent 4,492,076 a Fadenauflöseröhrchen is also known, the hollow body is rotatably mounted in a preparation unit.
The hollow body in this case has a connected to an annular channel Lufteinströmbohrung that can be positioned by means of a tool so that the air flow can selectively, that is, depending on the rotation of the present yarn, either left or right-handed to flow.
The annular channel is sealed at the top by a seal, which in turn is defined by a rounded lid.

Wie insbesondere aus Fig. 1 der US-PS 4,492,076 ersichtlich, sind diese bekannten Auflöseröhrchen allerdings deutlich beabstandet zu den Ausgängen eines in einem Spleißprisma angeordneten Spleißkanal angeordnet und damit in keiner Weise geeignet, problematische Garne, insbesondere Elastangarne, in die Auflöseröhrchen einzusaugen und dort pneumatisch zu fixieren.As can be seen in particular from Fig. 1 of US Patent 4,492,076, however, these known Auflöseröhrchen are clearly spaced from the outputs of arranged in a splicing prism splice arranged and thus in any way suitable to suck problematic yarns, especially elastane yarns in the Auflöseröhrchen and there pneumatically to fix.

Des Weiteren sind durch die DE 33 26 966 A1 Fadenspleißvorrichtungen bekannt, bei denen die Mittelachsen der Auflöseröhrchen jeweils bezüglich der Mittellängsebene des Spleißkanals seitlich versetzt angeordnet sind.
Bei derartig ausgebildeten Fadenspleißvorrichtungen besteht, insbesondere bei schwierigen Garnen, wie Elastangarnen, die zum Kräuseln neigen, stets die Gefahr, dass die geschnittenen Fadenenden nach dem Ablängen sofort, seitlich an den Auflöseröhrchen vorbei, unvorbereitet in den Spleißkanal gezogen werden.
Das bedeutet, Halteröhrchen, wie sie in der DE 33 26 966 A1 beschrieben sind, sind aufgrund ihrer Anordnung und Ausbildung nicht geeignet schwierige Garne sicher einzusaugen und pneumatisch zu fixieren.Furthermore, by the DE 33 26 966 A1 Fadensleiißvorrichtungen known in which the central axes of the Auflöseröhrchen are each arranged laterally offset with respect to the central longitudinal plane of the splice channel.
In such formed Fadensleiißvorrichtungen there is, especially in difficult yarns, such as elastane yarns that tend to curl, always the risk that the cut thread ends immediately after cutting, laterally past the Auflöseröhrchen be drawn unprepared in the splice.
This means that holding tubes, as described in DE 33 26 966 A1, are not suitable due to their arrangement and design difficult to suck in yarns and to fix pneumatically.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zum pneumatischen Verbinden von Garnen zu schaffen, die im Bedarfsfall auch das Spleißen von problematischen Garnen, beispielsweise Elastangarnen, ermöglicht und der Halte- und Auflöseröhrchen auf einfache Weise auf wechselnde Garnparameter anpaßbar sind.Based on the aforementioned prior art, the present invention seeks to provide a device for the pneumatic joining of yarns, which allows splicing of problematic yarns, such as elastane yarns, if necessary, and the holding and Auflöseröhrchen easily adaptable to changing yarn parameters are.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung gelöst, wie sie im Anspruch 1 beschrieben ist.This object is achieved by a device as described in claim 1.

Vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind in den Unteransprüchen beschrieben.Advantageous embodiments of the device according to the invention are described in the subclaims.

Die erfindungsgemäße Vorrichtung hat dabei insbesondere den Vorteil, daß die Fadenenden von Ober- und Unterfaden, die in Fadenklemmeinrichtungen festgelegt sind, die beabstandet zum Spleißprisma ober- und unterhalb der Fadenspleißvorrichtung angeordnet sind, nach ihrem Ablängen durch entsprechende Fadenschneideinrichtungen, sofort in die in unmittelbarer Nähe der Ausgänge des Spleißkanals angeordneten Halte- und Auflöseröhrchen eingesaugt und dort zusätzlich pneumatisch fixiert werden.
Durch die zusätzliche pneumatische Fixierung der Fadenenden wird beispielsweise bei Elastangarnen auch das typische Kräuseln der Fadenenden weitestgehend vermieden und damit auf einfache und sichere Weise die Erstellung ordnungsgemäßer Spleiße gewährleistet.The device according to the invention has the particular advantage that the yarn ends of upper and lower thread, which are set in thread clamping devices, which are spaced apart from the splicing prism above and below the yarn splicing device, after their cutting by appropriate thread cutting devices, immediately in the immediate vicinity the holding and dissolving tube arranged in the splice channel are sucked in and additionally pneumatically fixed there.
Due to the additional pneumatic fixation of the thread ends, for example, the typical curling of the thread ends is largely avoided in Elastangarnen and thus ensures a simple and secure way to create proper splices.

Die trichterartige Kontur der Eingangsöffnung der Halte- und Auflöseröhrchen stellt dabei sicher, daß auch solche schwierigen Garne zuverlässig eingesaugt werden.
Da die Halte- und Auflöseröhrchen auswechselbar in Bohrungen des Spleißprismas festgelegt sind, ist außerdem jederzeit eine Anpassung der Halte- und Auflöseröhrchen auf die jeweils vorliegenden Garnparameter möglich, so daß ohne größeren Aufwand eine optimale Vorbereitung der angesaugten Fadenenden für den nachfolgenden Spleißvorgang erzielt werden kann.
Die notwendige Lagerhaltung beschränkt sich dabei auf die Halte- und Auflöseröhrchen.The funnel-like contour of the inlet opening of the holding and Auflöseröhrchen thereby ensures that even such difficult yarns are reliably sucked.
Since the holding and Auflöseröhrchen are interchangeable set in holes of the splicing prism, anytime an adjustment of the holding and Auflöseröhrchen to the respective yarn parameters is possible, so that optimal preparation of the sucked yarn ends for the subsequent splicing process can be achieved without much effort.
The necessary storage is limited to the holding and Auflöseröhrchen.

Wie im Anspruch 2 dargelegt, ist in vorteilhafter Ausführungsform vorgesehen, daß die trichterartige Kontur Bestandteil eines Arretierungsmittels ist, das, beispielsweise durch einen gut zugängigen Schraubenbolzen gesichert, das zugehörige Halte- und Auflöseröhrchen leicht auswechselbar in einer Bohrung des Spleißprismas fixiert.
Ein solches Arretierungsmittel ist, beispielsweise als tiefgezogenes Blechteil relativ leicht und kostengünstig herstellbarAs set forth in claim 2, it is provided in an advantageous embodiment that the funnel-like contour is part of a locking means, for example, secured by a readily accessible bolt, the associated holding and Auflöseröhrchen easily replaceable fixed in a bore of the splicing prism.
Such a locking means is relatively easy and inexpensive to produce, for example, as a deep-drawn sheet metal part

In bevorzugter Ausbildung ist außerdem, wie im Anspruch 3 dargelegt, vorgesehen, daß die Halte- und Auflöseröhrchen so eingebaut sind, daß die Mittelachse des Halte- und Auflöseröhrchens jeweils in Höhe des Spleißkanalgrundes verläuft.
Auf diese Weise ist gewährleistet, daß die in den Fadenklemmeinrichtungen fixierten Fadenenden mittig über die Halte- und Auflöseröhrchen gespannt sind, so daß die Fadenenden sofort mit dem vollen Saugzug der Halte- und Auflöseröhrchen beaufschlagt werden, was sich sehr positiv auf die Funktionssicherheit der Halte- und Auflöseröhrchen auswirkt.In a preferred embodiment, moreover, as set forth in claim 3, provided that the holding and Auflöseröhrchen are installed so that the central axis of the holding and Auflöseröhrchens each extending at the level of Spllechkanalgrundes.
In this way, it is ensured that the yarn ends fixed in the thread clamping devices are clamped centrally over the holding and Auflöseröhrchen, so that the thread ends are immediately applied to the full suction of the holding and Auflöseröhrchen, which is very beneficial to the reliability of the holding and dissolution tube.

Wie in den Ansprüchen 4 und 5 beschrieben, sind in bevorzugter Ausführungsform sowohl die im Spleißkanal angeordneten Einblasöffnungen als auch die Halte- und Auflöseröhrchen über Pneumatikleitungen, in die ansteuerbare Ventile eingeschaltet sind, an eine Druckluftquelle angeschlossen.
Die Ventile, beispielsweise 2/2-Wegeventile, sind dabei über entsprechende Steuerleitungen mit dem Spulstellenrechner der betreffenden Spulstelle verbunden und können auf diese Weise definiert angesteuert werden, ohne daß ein großer zusätzlicher Steuerungsaufwand notwendig ist.
Das heißt, bei Bedarf können die Öffnungszeiten des Ventils für die Halte- und Auflöseröhrchen und die Öffnungszeiten des Ventils für die im Spleißkanal angeordneten Einblasöffnungen exakt eingestellt und bei Bedarf optimal angepaßt werden.As described in claims 4 and 5, both the injection ports arranged in the splice channel and the holding and Auflöseröhrchen are connected via pneumatic lines in the controllable valves are connected to a compressed air source in a preferred embodiment.
The valves, for example, 2/2-way valves are connected via appropriate control lines to the winding station of the respective winding unit and can in this way be controlled defined without a large additional control effort is necessary.
That is, if necessary, the opening times of the valve for the holding and Auflöseröhrchen and the opening times of the valve for the arranged in the splice channel injection openings can be precisely adjusted and optimally adapted if necessary.

Wie im Anspruch 6 dargelegt, ist dabei in vorteilhafter Ausführungsform vorgesehen, daß sich das Einleiten von Druckluft in die Halte- und Auflöseröhrchen zum Fixieren der Fadenenden und das Einleiten von Druckluft in den Spleißkanal zum Verspleißen der Fadenenden zeitlich überlappen.
Durch eine solche zeitliche Überlappung wird verhindert, daß die im Spleißkanal angeordneten Fadenenden von Ober- und Unterfaden vor dem Einblasen von Spleißluft kräuseln können und dabei den Spleißkanal zumindest teilweise verlassen.
Das heißt, die Druckluftbeaufschlagung der Halte- und Auflöseröhrchen und damit die zusätzliche pneumatische Fixierung der Fadenenden wird wenigstens lange aufrecht gehalten, bis sichergestellt ist, daß die Fadenenden bereits ausreichend miteinander verbunden sind.As set forth in claim 6, it is provided in an advantageous embodiment that overlap the introduction of compressed air into the holding and Auflöseröhrchen for fixing the yarn ends and the introduction of compressed air into the splice for splicing the yarn ends in time.
By such a temporal overlap prevents the arranged in the splice channel yarn ends of upper and lower thread can frizz before injecting spliced air and leave the splice at least partially.
That is, the pressurization of the holding and Auflöseröhrchen and thus the additional pneumatic fixation of the thread ends is held upright at least until it is ensured that the thread ends are already sufficiently connected.

Weitere Einzelheiten der Erfindung sind nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles erläutert.Further details of the invention are explained below with reference to an embodiment shown in the drawings.

Es zeigt:

Fig. 1
eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine mit der erfindungsgemäßen Fadenspleißvorrichtung, in Seitenansicht,
Fig. 2.
die erfindungsgemäße Fadenspleißvorrichtung in Draufsicht, teilweise im Schnitt,
Fig. 3
die erfindungsgemäße Fadenspleißvorrichtung gemäß Schnitt III - III,
Fig.4
ein Diagramm des zeitlichen Ablaufes der im Spleißkanal sowie in den Halte- und Auflöseröhrchen wirksamen Druckimpulse.
It shows:
Fig. 1
a workstation of a cheese-producing textile machine with the yarn splicing device according to the invention, in side view,
Fig. 2.
the yarn splicing device according to the invention in plan view, partly in section,
Fig. 3
the thread splicing device according to the invention according to section III - III,
Figure 4
a diagram of the timing of the effective in the splice channel and in the holding and Auflöseröhrchen pressure pulses.

In Figur 1 ist in Seitenansicht schematisch eine Arbeitsstelle 1 einer Kreuzspulen herstellenden Textilmaschine, im Ausführungsbeispiel eines Kreuzspulautomaten, dargestellt. Derartige Textilmaschinen verfügen üblicherweise über eine Vielzahl solcher in Reihe nebeneinander angeordneter Arbeitsstellen 1.
Auf den Arbeitsstellen 1 werden Spinnkopse 2, die beispielsweise auf (nicht dargestellten) Ringspinnmaschinen hergestellt wurden, zu großvolumigen Kreuzspulen 13 umgespult.
Die Arbeitsstellen 1 sind zu diesem Zweck mit verschiedenen, schematisch dargestellten Fadenhandhabungs- und Fadenprüfeinrichtungen sowie einer eigenen Steuerungseinrichtung, einem sogenannten Spulstellenrechner 5, ausgerüstet.FIG. 1 shows schematically in side view a work station 1 of a textile machine producing cross-wound bobbins, in the exemplary embodiment of a cheese winder. Such textile machines usually have a plurality of such in series juxtaposed jobs. 1
On the jobs 1 spinning cops 2, which were prepared for example on (not shown) ring spinning machines, rewound to large-volume cheeses 13.
The workstations 1 are equipped for this purpose with various, schematically shown Fadenhandhabungs- and Fadenprüfeinrichtungen and its own control device, a so-called winding station computer 5.

Wie in Figur 1 angedeutet, läuft der vom Spinnkops 2 abgezogene Faden 3 auf seinem Weg zur Kreuzspule 13, die in einem Spulenrahmen 14 drehbar gelagert ist und während des Spulbetriebes reibschlüssig über eine sogenannte Nuttrommel 12 angetrieben wird, vorzugsweise durch einen Abzugsbeschleuniger 4, einen Fadenspanner 6, einen Fadenreiniger 8 mit einer zugehörigen Fadenschneideinrichtung 9 sowie eine optional vorhandene Paraffiniereinrichtung 10.As indicated in Figure 1, the withdrawn from Spinnkops 2 thread 3 runs on its way to the cheese 13, which is rotatably mounted in a coil frame 14 and during the winding operation frictionally via a so-called grooved drum 12 is driven, preferably by a take-off accelerator 4, a thread tensioner 6, a thread cleaner 8 with an associated Thread cutting device 9 and an optional paraffining device 10.

Außerhalb dieses "regulären" Fadenlaufweges 30 ist außerdem eine Fadenspleißvorrichtung 7 angeordnet.Outside this "regular" yarn path 30 also a yarn splicing device 7 is arranged.

Zur Handhabung der Fadenenden im Falle eines Fadenbruches oder eines definierten Reinigerschnittes sind außerdem eine Saugdüse 15 sowie ein Greiferrohr 19 vorgesehen. Die Saugdüse 15, die den Oberfaden 31 handhabt, weist dabei eine unterdruckbeaufschlagbare Mündung 16 auf und ist um eine Schwenkachse 17 begrenzt drehbar gelagert. Das um eine Schwenkachse 21 begrenzt drehbar gelagerte Greiferrohr 19, das den Unterfaden 32 zur Fadenspleißvorrichtung 7 bringt, verfügt über eine unterdruckbeaufschlagbare Ansaugöffnung 20.For handling the yarn ends in the event of a yarn break or a defined cleaner cut a suction nozzle 15 and a gripper tube 19 are also provided. The suction nozzle 15, which handles the upper thread 31, in this case has a mouth druckdruckeaufschlagbare 16 and is limited to a pivot axis 17 rotatably mounted. The rotatably mounted about a pivot axis 21 rotatably mounted gripper tube 19, which brings the lower thread 32 to the yarn splicing device 7, has a vacuum-pressurized suction port 20th

Wie in der Figur 2 schematisch angedeutet, besteht die erfindungsgemäße Fadenspleißvorrichtung 7 im wesentlichen aus einem am Spulstellengehäuse angeordneten Luftverteilerblock 24, an dem über Schraubenbolzen 23 ein sogenanntes Spleißprisma 25 festgelegt ist. Das Spleißprisma 25 weist, wie üblich, einen Spleißkanal 26 auf, in den Druckluft-Einblasöffnungen 29 einmünden.
Die Druckluft-Einblasöffnungen 29 sind dabei über eine an den Luftverteilerblock 24 angeschlossene Pneumatikleitung 18, in die ein Ventil, zum Beispiel eine 2/2-Wegeventil 22, eingeschaltet ist, mit einer Druckluftquelle 11 verbunden. Das Wegeventil 22 ist seinerseits außerdem über eine Steuerleitung 27 an den Spulstellenrechner 5 der betreffenden Arbeitsstelle 1 angeschlossen.As schematically indicated in FIG. 2, the thread splicing device 7 according to the invention consists essentially of an air distributor block 24 arranged on the winding unit housing, on which a so-called splicing prism 25 is fixed by means of bolts 23. The splicing prism 25 has, as usual, a splice channel 26, open into the compressed air injection openings 29.
The compressed air injection openings 29 are connected via a connected to the air distribution block 24 pneumatic line 18, in which a valve, for example, a 2/2-way valve 22, is connected to a compressed air source 11. The directional control valve 22 is in turn also connected via a control line 27 to the winding station computer 5 of the relevant workstation 1.

Des weiteren ist in unmittelbarer Nähe der Ausgänge 50 bzw. 51 des Spleißkanals 26 in entsprechenden Aufnahmebohrungen 46 bzw. 47 jeweils ein Halte- und Auflöseröhrchen 33 bzw. 34 angeordnet.
Die Halte- und Auflöseröhrchen 33 bzw. 34 sind dabei jeweils durch ein Arretierungsmittel 53, das eine trichterartige Kontur 52 aufweist, auswechselbar festgelegt und so positioniert, daß die Mittelachsen 37 bzw. 38 der Halte- und Auflöseröhrchen 33 bzw. 34 jeweils auf Höhe des Grundes 55 des Spleißkanals 26 angeordnet sind und orthogonal zu einer Mittelebene 45 des Spleißkanals 26 liegen.
Die Arretierungsmittel 53 sind zum Beispiel über Schraubenbolzen 54 am Spleißprisma 25 festlegbar.Furthermore, in the immediate vicinity of the outputs 50 and 51 of the splice 26 in respective receiving bores 46 and 47 are each a holding and Auflöseröhrchen 33 and 34 respectively.
The holding and Auflöseröhrchen 33 and 34 are interchangeably fixed by a respective Arretierungsmittel 53 having a funnel-like contour 52 and positioned so that the central axes 37 and 38 of the holding and Auflöseröhrchen 33 and 34 respectively at the level of Grundes 55 of the splice channel 26 are arranged and lie orthogonal to a median plane 45 of the splice 26.
The locking means 53 can be fixed for example by means of bolts 54 on the splicing prism 25.

Die Halte- und Auflöseröhrchen 33 bzw. 34, die, wie üblich wenigstens eine Tangentialbohrung 56 bzw. 57 besitzen, sind über eine Pneumatikleitung 35, in die ein Ventil 36 eingeschaltet ist, an die Druckluftquelle 11 angeschlossen, wobei das 2/2-Wegeventil 36 über eine Steuerleitung 28 vom Spulstellenrechner 5 aus ansteuerbar ist.The holding and Auflöseröhrchen 33 and 34, which, as usual at least one tangential bore 56 and 57 have, via a pneumatic line 35, in which a valve 36 is turned on, connected to the compressed air source 11, wherein the 2/2-way valve 36 is controlled via a control line 28 from the winding station 5 from.

Wie aus Figur 2 weiter ersichtlich, sind beidseitig des Spleißprismas 25 außerdem Fadenführungseinrichtungen 39 bzw. 40, Fadenklemmeinrichtungen 43 bzw. 44 sowie Fadenschneideinrichtungen 41 bzw. 42 angeordnet.As can also be seen from FIG. 2, thread guiding devices 39 and 40, thread clamping devices 43 and 44 and thread cutting devices 41 and 42 are also arranged on both sides of the splicing prism 25.

Funktion der erfindungsgemäßen Fadenspleißvorrichtung:Function of the thread splicing device according to the invention:

Während des Spulbetriebes wird der laufende Faden 3 durch den in Figur 1 schematisch dargestellten Fadenreiniger 8 überwacht, der jede Fadenunregelmäßigkeit detektiert und an den Spultellenrechner 5 meldet.
Der Spultellenrechner 5 initiiert daraufhin sofort einen definierten Fadenschnitt.
Das heißt, durch die Fadenschneideinrichtung 9 wird der laufende Faden 3 in einen Oberfaden 31 und einen Unterfaden 32 getrennt.
Während der Oberfaden 31 auf die Oberfläche der mit einem Bremsmoment beaufschlagten Kreuzspule 13 aufläuft, bleibt der Unterfaden 32 in der Regel im Fadenspanner 6 gehalten.During the winding operation, the running thread 3 is monitored by the thread cleaner 8 shown schematically in FIG. 1, which detects each thread irregularity and reports it to the spindle computer 5.
The Spultellenrechner 5 then initiates immediately a defined thread section.
That is, by the thread cutting device 9, the traveling thread 3 is separated into an upper thread 31 and a lower thread 32.
While the upper thread 31 runs onto the surface of the cross-wound bobbin 13 subjected to a braking torque, the bobbin thread 32 is usually held in the thread tensioner 6.

Zur Ausreinigung des schadhaften Fadenstückes sowie zur Erstellung einer neuen Fadenverbindung wird anschließend der auf die Kreuzspule 13 aufgelaufene Oberfaden 31 wieder aufgenommen.
Das heißt, die Saugdüse 15 wird, wie dies in Figur 1 strichpunktiert angedeutet ist, nach oben geschwenkt und mit ihrer unterdruckbeaufschlagbaren Mündung 16 im Bereich der Oberfläche der Kreuzspule 13 positioniert.
Gleichzeitig die Kreuzspule 13 langsam in Abwickelrichtung rotiert.
Sobald die Saugdüse 15 den Oberfaden 31 aufgenommen hat, wird mittels einer im Bereich der Saugdüse 15 angeordneten (nicht dargestellten) Fadenschneideinrichtung das schadhafte Fadenstück herausgetrennt und entsorgt.
Anschließend wird der jetzt fehlerfreie Oberfaden 31 durch die Saugdüse 15 in den Spleißkanal 26 des Spleißprismas 25 der Fadenspleißvorrichtung 7 eingefädelt, wie dies in Figur 2 angedeutet ist.
Die Saugdüse 15 positioniert den Oberfaden 31 dabei auch in der oberen Fadenklemmeinrichtung 44 sowie zwischen den Werkzeugen der unteren Fadenschneideinrichtung 41.To clear the defective thread piece and to create a new thread connection of the accumulated on the cheese 13 upper thread 31 is then resumed.
That is, the suction nozzle 15 is, as indicated in phantom in Figure 1, pivoted upwards and positioned with its unterdruckbeaufschlagbaren mouth 16 in the region of the surface of the cheese 13.
At the same time the cross-wound bobbin 13 slowly rotates in the unwinding direction.
As soon as the suction nozzle 15 has received the upper thread 31, 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 15.
Subsequently, the now faultless upper thread 31 through the suction nozzle 15 in the splice 26 of the splicing prism 25 of Thread splicer 7 threaded, as indicated in Figure 2.
The suction nozzle 15 also positions the upper thread 31 in the upper thread clamping device 44 and between the tools of the lower thread cutting device 41.

Gleichzeitig oder etwas zeitversetzt zur Aufnahme des Oberfadens 31 erfolgt auch die Aufnahme des Unterfadens 32. Das heißt, das Greiferrohr 19 holt den Unterfaden 32, der nach einem kontrollierten Fadenschnitt in der Regel im Fadenspanner 6 festgelegt ist, am Fadenspanner 6 ab und legt ihn ebenfalls in den Spleißkanal 26 des Spleißprismas 25 der Fadenspleißvorrichtung 7 ein.
Wie der Oberfaden 31 wird auch der Unterfaden 32 dabei in eine zugehörige untere Fadenklemmeinrichtung 43 sowie einer obere Fadenschneideinrichtung 42 eingefädelt.
Sobald die beide Fäden 31 und 32 in den Spleißkanal 26 eingelegt und in den Fadenklemmeinrichtungen 43 bzw 44 mechanisch fixiert sind, werden, durch entsprechendes Ansteuern eines Ventils 22, die Halte- und Auflöseröhrchen 33, 34 mit Druckluft beaufschlagt.
Anschließend werden die Fäden 31 und 32 durch die Fadenschneideinrichtungen 41 bzw. 42 abgelängt.At the same time or a little later in time to receive the upper thread 31, the lower thread 32 is also picked up. That is, the gripper tube 19 picks up the lower thread 32, which is usually fixed in the thread tensioner 6 after a controlled thread cut, on the thread tensioner 6 and places it as well into the splice channel 26 of the splicing prism 25 of the thread splicer 7.
As the upper thread 31 and the lower thread 32 is thereby threaded into an associated lower thread clamping device 43 and an upper thread cutting device 42.
Once the two threads 31 and 32 are inserted into the splice 26 and mechanically fixed in the thread clamping devices 43 and 44, respectively, by appropriate driving a valve 22, the holding and Auflöseröhrchen 33, 34 acted upon with compressed air.
Subsequently, the threads 31 and 32 are cut to length by the thread cutting devices 41 and 42, respectively.

Das heißt, der Spulstellenrechner 5 steuert über die Signalleitung 28 zunächst das Wegeventil 36 im Sinne "öffnen" an, so daß im Bereich der Eingangsöffnungen 48 bzw. 49 der Halte- und Auflöseröhrchen 33 bzw. 34 eine relativ starke Ansaugströmung ansteht.
Nach dem Trennen des Ober- und Unterfadens 31, 32 durch die Fadenschneideinrichtungen 41 bzw. 42 werden über die Saugdüse 15 bzw. das Greiferrohr 19 zunächst die abgeschnittenen Fadenenden entsorgt und gleichzeitig die freien Fadenenden von Oberfaden 31 und Unterfaden 32 über die trichterartige Kontur 52 der Arretierungsmittel 53 in die Halte- und Auflöseröhrchen 33 bzw. 34 eingesaugt.
Die Fadenenden von Ober-und Unterfaden 31, 32 werden dadurch pneumatisch fixiert und damit daran gehindert, sich zu stark zu kräuseln.
Durch die über die Tangentialbohrungen 56 bzw. 57 der Halte- und Auflöseröhrchen 33 bzw. 34 einströmende Druckluft werden die Fadenenden von Ober- und Unterfaden außerdem vorschriftsmäßig pneumatisch vorbereitet.
Das heißt, die in die Halte- und Auflöseröhrchen 33 bzw. 34 eingesaugten Fadenenden von Ober- und Unterfaden werden weitestgehend von ihrer Garndrehung sowie von Kurzfasern befreit.That is, the winding station computer 5 controls via the signal line 28 first the directional control valve 36 in the sense "open", so that in the region of the inlet openings 48 and 49 of the holding and Auflöseröhrchen 33 and 34 is present a relatively strong suction flow.
After separating the upper and lower thread 31, 32 by the thread cutting devices 41 and 42 are on the suction nozzle 15 and the gripper tube 19, first the disposed of cut yarn ends and at the same time the free yarn ends of upper thread 31 and lower thread 32 through the funnel-like contour 52 of the locking means 53 in the holding and Auflöseröhrchen 33 and 34, respectively.
The yarn ends of upper and lower thread 31, 32 are thereby pneumatically fixed and thus prevented from curling too much.
By the over the tangential bores 56 and 57 of the holding and Auflöseröhrchen 33 and 34 incoming compressed air, the yarn ends of upper and lower thread are also prepared in accordance with the regulations pneumatically.
That is, the sucked into the holding and Auflöseröhrchen 33 and 34 thread ends of upper and lower thread are largely freed from their yarn twist and short fibers.

Die vorbereiteten Fadenenden werden dann, wie bekannt und daher weder dargestellt noch näher erläutert, durch einen sogenannten Schlaufenzieher in den Spleißkanal 26 der Fadenspleißvorrichtung 7 gezogen und dort pneumatisch verbunden.
Das heißt, der Spulstellenrechner 5 steuert über eine Signalleitung 27 das 2/2-Wegeventil 22 so an, daß über die Pneumatikleitung 18 sowie die Druckluft-Einblasöffnungen 29 Spleißluft in den Spleißkanal 26 eingeblasen wird, die die zunächst weitestgehend parallel angeordneten Fasern der beiden Fadenenden miteinander verwirbelt und dabei eine Fadenverbindung herstellt.The prepared thread ends are then, as known and therefore neither illustrated nor explained in more detail, pulled by a so-called loop puller in the splice 26 of the yarn splicing device 7 and pneumatically connected there.
That is, the Spulstellenrechner 5 controls via a signal line 27, the 2/2-way valve 22 so that over the pneumatic line 18 and the compressed air injection openings 29 splicing air is injected into the splice 26, which initially largely parallel arranged fibers of the two thread ends swirled together and thereby produces a thread connection.

Während die Fadenenden durch den Schlaufenzieher in den Spleißkanal 26 zurückgezogen werden, bleiben die Halte- und Auflöseröhrchen 33, 34 druckluftbeaufschlagt, so daß die Fadenenden von Ober- und Unterfaden aufgrund der in den Halte- und Auflöseröhrchen 33, 34 herrschenden Injektorströmung in Richtung der Halte- und Auflöseröhrchen 33, 34 mit einer pneumatischen Haltekraft beaufschlagt werden.While the thread ends are retracted by the loop puller in the splice 26, the holding and Auflöseröhrchen 33, 34 remain pressurized air, so that the Thread ends of upper and lower thread due to the prevailing in the holding and Auflöseröhrchen 33, 34 Injektorströmung in the direction of the holding and Auflöseröhrchen 33, 34 are subjected to a pneumatic holding force.

Die Injektorströmung in den Halte- und Auflöseröhrchen 33, 34 bleibt dabei wenigsten bis zur Einleitung des ersten Spleißluftstoßes in den Spleißkanal 26 aufrechterhalten.The Injektorströmung in the holding and Auflöseröhrchen 33, 34 remains at least until the initiation of the first splice air burst is maintained in the splice 26.

In bevorzugter Ausführungsform, wird der Druckluftimpuls 58 zum Fixieren der Fadenenden in den Halte- und Auflöseröhrchen 33, 34, wie in Figur 4 angedeutet, zu einem Zeitpunkt t1 zugeschaltet und bleibt bis zum späteren Zeitpunkt t3 stehen.
Der Druckluftimpuls 59 zum nahezu garngleichen Verspleißen der beiden Fadenenden steht dagegen zwischen den Zeitpunkten t2 und t4 an.
Das bedeutet, der Druckluftimpuls 58 zum Spleißen der Fadenenden und der Druckluftimpuls 59 zur Fixieren der Fadenenden in den Halte- und Auflöseröhrchen 33, 34 überlappen sich zeitlich.In a preferred embodiment, the compressed air pulse 58 is connected to fix the thread ends in the holding and Auflöseröhrchen 33, 34, as indicated in Figure 4, at a time t 1 and remains until the later time t 3 stand.
The compressed air pulse 59 for almost yarn-like splicing of the two yarn ends, however, is between times t 2 and t 4 at.
That is, the compressed air pulse 58 for splicing the yarn ends and the compressed air pulse 59 for fixing the yarn ends in the holding and Auflöseröhrchen 33, 34 overlap in time.

Claims (5)

  1. Device for the pneumatic joining of yarns, in particular elastane yarns, with a splicing prism (25) comprising a splicing channel (26) that can be charged with compressed air and holding and opening tubes (33, 34) for preparing the yam ends (31, 32) to be spliced pneumatically, whereby the central axes of the holding and opening tubes intersect the central longitudinal plane of the splicing channel,
    characterised in that
    the holding and opening tubes (33, 34) are secured so as to be exchangeable in bores (46, 47) of the splicing prism (25),
    in that the entry opening (48, 49) of the holding and opening tubes (33, 34) is positioned respectively in the immediate vicinity of one of the two outlets (50, 51) of the splicing channel (26),
    in that the central axis (37, 38) of the holding and opening tubes (33, 34) runs respectively at the height of the base (55) of the splicing channel (26) and
    in that the entry opening (48, 49) of the holding and opening tube (33, 34) has a funnel-shaped contour (52), which ensures a reliable suctioning in of a cut off thread end from the top or bottom thread (31, 32) into the holding and opening tube (33, 34).
  2. Device according to claim 1, characterised in that the funnel-shaped contour (52) is a component of an arresting element (53) which can be secured by means of at least one bolt (54) onto the splicing prism (25).
  3. Device according to claim 1, characterised in that injection openings (29) and tangential bores (56, 57) arranged in the splicing channel (26) of the splicing prism (25) are connected in the holding and opening tubes (33, 34) by means of pneumatic lines (18 or 35) and controllable valves (22 or 36) to a source of compressed air (11).
  4. Device according to claim 3, characterised in that the valves (22 or 36) are connected via control lines (27 or 28) to a winding station computer (5) and can be controlled so that the thread ends (31 or 32) are fixed pneumatically in the holding and opening tubes (33 or 34) at least until the introduction of a first injection of splicing air into the splicing channel (26) of the splicing prism (25).
  5. Device according to claim 4, characterised in that the valves (22, 36) can be controlled so that a pulse of compressed air (59) introduced into the holding and opening tube (33 or 34) and a pulse of compressed air (58) introduced into the splicing channel (26) of the splicing prism (25) overlap temporally.
EP02025978A 2002-01-25 2002-11-21 Apparatus for pneumatically connecting the ends of yarns Expired - Lifetime EP1331192B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10202781 2002-01-25
DE10202781A DE10202781A1 (en) 2002-01-25 2002-01-25 Device for the pneumatic connection of yarns

Publications (3)

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EP1331192A2 EP1331192A2 (en) 2003-07-30
EP1331192A3 EP1331192A3 (en) 2003-11-19
EP1331192B1 true EP1331192B1 (en) 2006-09-06

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EP02025978A Expired - Lifetime EP1331192B1 (en) 2002-01-25 2002-11-21 Apparatus for pneumatically connecting the ends of yarns

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US (1) US20030167747A1 (en)
EP (1) EP1331192B1 (en)
JP (1) JP2003212438A (en)
CN (1) CN1295125C (en)
AT (1) ATE338721T1 (en)
DE (2) DE10202781A1 (en)

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Also Published As

Publication number Publication date
EP1331192A2 (en) 2003-07-30
DE50208065D1 (en) 2006-10-19
DE10202781A1 (en) 2003-07-31
US20030167747A1 (en) 2003-09-11
EP1331192A3 (en) 2003-11-19
CN1295125C (en) 2007-01-17
CN1433948A (en) 2003-08-06
JP2003212438A (en) 2003-07-30
ATE338721T1 (en) 2006-09-15

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