EP0356767B1 - Thread-splicing apparatus and method for preparing the thread ends - Google Patents

Thread-splicing apparatus and method for preparing the thread ends Download PDF

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Publication number
EP0356767B1
EP0356767B1 EP89114610A EP89114610A EP0356767B1 EP 0356767 B1 EP0356767 B1 EP 0356767B1 EP 89114610 A EP89114610 A EP 89114610A EP 89114610 A EP89114610 A EP 89114610A EP 0356767 B1 EP0356767 B1 EP 0356767B1
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EP
European Patent Office
Prior art keywords
yarn
thread
tubule
splicing device
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP89114610A
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German (de)
French (fr)
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EP0356767A1 (en
Inventor
Peter Artzt
Heinrich Preininger
Gerhard Egbers
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Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Rieter Ingolstadt Spinnereimaschinenbau AG
Schubert und Salzer Maschinenfabrik AG
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Application filed by Rieter Ingolstadt Spinnereimaschinenbau AG, Schubert und Salzer Maschinenfabrik AG filed Critical Rieter Ingolstadt Spinnereimaschinenbau AG
Publication of EP0356767A1 publication Critical patent/EP0356767A1/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

Definitions

  • the invention relates to a thread splicing device for the knot-free connection of threads with a thread splicing chamber and a tube through which fluid flows, at a distance from the thread splicing chamber, for receiving a thread end for its preparation for the splicing process, and a method for thread end preparation in such a thread splicing device.
  • connection of thread ends by splicing requires that the preparation of the thread ends is carried out carefully in order to obtain a good quality of the connection.
  • the thread end must be substantially free of twists over a certain length, so that it can be easily connected to a second thread end, which is also essentially free of twists, in the spinning device.
  • the preparation of the thread ends is carried out in devices in which the thread ends are exposed to a fluid flow which grips the thread ends transversely to the thread longitudinal axes with the help of the pressure or suction force which arises in the process and swirls them in such a way that the rotation is dissolved in the thread ends.
  • Another known device proposes a more intensive mechanical and pneumatic loading of the thread ends for the same purpose in order to dissolve, clean and spread the thread ends in individual fibers. This is done by the fact that the compressed gas flowing obliquely to the longitudinal direction of the individual fibers with simultaneous beating and tearing, pulling, pulling, mechanical and pneumatic loading in the direction of the thread end causes the thread end to vibrate. This process is relatively complex. In addition, there is a risk that this intensive violent dissolution of the thread ends will damage the individual fibers and are no longer suitable for a good splice connection.
  • a particular problem for splicing is represented by the threads produced by new spinning processes. These are in particular threads produced by the open-end rotor spinning process, fiber wound spinning processes or similar new spinning processes. With this type of yarn production there is no uniform twist in the thread. In addition, these threads often have wraps through individual fibers (so-called abdominal bandages) that are extremely difficult to dissolve. The previously known splicing methods have proven to be unsuitable for this, which is why it is still a problem today to splice such yarns.
  • the tube has a rough inner surface that touches the thread end, and that the tube is turbulently flowed through by a fluid and the thread end is struck by the turbulent flow against the structured inner surface of the tube until that Thread end is rotation-free.
  • the inner surface of the tube is roughened by cording.
  • An irregular arrangement of the edges facilitates the untwisting of the thread, since the thread cannot so easily nestle into valleys in the structure. If the structure is sharp-edged, unscrewing the thread end is also made easier.
  • the roughly structured inner surface of the tube is arranged axially and / or on a part of the circumference. As a result, a precisely defined zone of the thread end, which is to be opened, is predetermined. If the tube has an inner diameter that is several times the thread size, then it is safe to insert the thread end into the tube as well as sufficient movement of the thread in the tube. If the inside diameter corresponds to a maximum of half the length of the thread end protruding into the tube, very good results of unscrewing the thread end can be achieved.
  • a quick adjustment to different lengths of the thread end to be opened can be achieved by a displaceable arrangement of the tube in the axial direction.
  • a thread insertion zone with a diameter increasing towards the end of the tube is arranged, for example in the form of a conical widening, at the end of the tube facing the thread splicing chamber. If the surface of the thread insertion zone is also smooth, the insertion of the thread end into the tube is facilitated.
  • a slot which is arranged in the thread insertion zone in the direction of the longitudinal axis of the tube, also facilitates the insertion of the thread end.
  • the tube is designed such that it can be inserted alternately into the thread splicing device, it is advantageously ensured that tubes with different characteristics of the structure of the inner surface can be adapted to different thread qualities.
  • the tube is rotated in such a way that the thread is inserted once at one end of the tube and after rotating the tube through 180 ° at the other end.
  • a rotatable part is arranged on the thread splicing device, in which at least one tube is arranged, the tube can be carried out quickly and easily for cleaning purposes or for mutual use.
  • tubes with inner surfaces of different strengths of roughness are arranged in the rotatable part, it is advantageously possible to use the appropriate tube for different thread qualities. This is particularly advantageous on machines on which different thread qualities are produced. The same applies to tubes arranged in the rotatable part with inner surfaces with different zones of roughness.
  • the method according to the invention consists in that a fluid flows through the tube turbulently and the end of the thread is knocked against the structured inner surface of the tube by the turbulent flow, so that the end of the thread becomes free of rotation.
  • the advantage here is that even stubborn twists, such as occur with twists or rotor yarns with belly bandages, are relatively gently resolved by the striking contact of the structured inner surface.
  • the length of the tube can be optimally utilized in an advantageous manner.
  • the introduction of the thread end into the tube is made considerably easier compared to a lateral introduction of the fluid into the tube, since the thread end is blown into the tube and is not sucked. Moreover, such a flow through the tube results in a much simpler construction of the thread splicing device.
  • FIG. 2 shows a further embodiment of the tube 1 according to the invention.
  • An advantageous thread insertion groove 5 is arranged on the thread insertion bevel 4, into which the thread end 11 lies before it reaches the tube 1.
  • This thread insertion groove 5 stabilizes the thread end 11 due to its groove-shaped design and prevents lateral evasion and thus an incorrect preparation attempt.
  • a smooth zone G is initially arranged in the tube 1 of FIG. 2 following a thread insertion zone E on the inner surface 2.
  • This smooth zone G is followed by a structured zone S.
  • the structured zone S of the inner surface 2 is axially limited.
  • the length of the thread end 11 to be released from its rotation is limited.
  • the rotation is only resolved up to the border area between smooth and structured zone G, S.
  • a shorter length of the thread end 11 of the tube 1 of FIG Rotation solved.
  • the use of different tubes 1 allows a thread splicing device 20 to be easily converted to threads of different fiber lengths, on which the length of the thread end 11 to be broken depends.
  • the exemplary embodiment of a tube 1 in FIG. 3 represents an inner surface 2 which has a boundary of the structured zone S on the circumference.
  • the smooth zone G of the inner surface 2 is located on the remaining part of the inner circumference of the tube 1.
  • 6 of the Tube 1 would be the case.
  • a combination of the arrangement of the rough inner surface 3, 6 of the tubes 1, as shown in FIGS. 2 and 3, is advantageous if a limited piece of the thread end 11 is to be gently opened, since that Thread end 11 is not constantly exposed to the rough inner surface 3, 6.
  • the structure 3 or 6 can, depending on the type of thread, be linear or spiral in the form of strips if the rough inner surface 3, 6 of the tube 1 is arranged axially and on part of the circumference of the inner surface 2 of the tube 1.
  • a structure 6 of the tube 1 in FIG. 3 is not achieved with grains 3, but rather by means of a cord on the surface.
  • the structuring of the surface is also possible with laser radiation or eroding.
  • This processing of the inner surface 2 is often less expensive and more durable than an arrangement of material on the inner surface 2.
  • a gentle untwisting of the thread end 11 is possible according to FIGS. 1 to 3, in that the structure of the inner surface 2 is chosen more or less roughly. The coarser and stronger the thread 10 and the tighter and tighter the rotation of the thread 10, the coarser, more aggressive and larger the structure on the inner surface 2 of the tube 1 must be. The mechanical load to which the thread end 11 is exposed is minimized by the appropriate choice of the structure.
  • FIG. 4 shows a top view of the tube 1, in which grains 3 are arranged on the inner surface 2. It can be seen that the sharp edges of the grains 3 protrude into the through opening of the tube 1.
  • the end of the thread 11 sticks to these sharp edges with parts of its fibers and thus, while being set into spinning movements due to the turbulent flow of fluid, dissolves the bond formed by the fibers.
  • the thread end 11 is thereby formed into a bundle of fibers with spread fibers.
  • the length of the fiber bundle is limited by the mean fiber length, since the fibers of the thread end 11 must remain bound at one end in the thread in order not to be completely removed from the thread by the fluid flow.
  • a free inner diameter D is several times the thread thickness d, and corresponds to a maximum of half the length of the thread end 11 protruding into the tube 1. This ensures that the thread end 11 on the one hand has enough space for its striking movements and on the other hand the rough inner surface 3, 6 touches with a sufficient length of the thread end 11.
  • a split version of the tube 1 is shown in a section transverse to the longitudinal axis.
  • the tube halves 1 'and 1 ⁇ are connected to each other by adhesive, screwing or clamping in the thread splicing device 20.
  • the division of the tube 1 enables the structure to be attached to the inner surface 2 of the tube 1 in a very simple manner. Both the arrangement of grains 3 and the processing of the inner surfaces 2 according to FIG. 3 are greatly simplified owing to the good accessibility. When using a detachable connection, cleaning or repair of the structure is also easier than with non-separable tubes 1.
  • a longitudinal section through the thread splicing device 20 and the tube 1 in FIG. 6 shows in one exemplary embodiment the arrangement of the tube 1 in the thread splicing device 20.
  • the tube 1 is fastened in the thread splicing device 20 in an axially steplessly adjustable manner. It is clamped here by a screw 21 which presses against the outer wall of the tube 1.
  • a distance A can be set by loosening the screw 21 and moving the tube 1 in the axial direction.
  • the distance A denotes the distance of a thread clamping point K from the tube 1, which is measured in the direction of the longitudinal axis of the tube 1.
  • the example of a thread splicing device 20 shown in FIG. 6 uses a tube 1 which can be used alternately.
  • This tube 1 has the advantage that the area in which the thread end 11 is to be opened can be substantially enlarged by turning the tube, the position of the thread insertion zone E relative to a thread splicing chamber 22 remaining essentially the same.
  • the thread insertion zone E with the thread insertion aid 5 on the inner surface 2 of the tube 1 is followed by a smooth zone G.
  • this zone G unscrewing the thread end 11 is not possible since it is less aggressive is as the structured zone S.
  • the rotation of the thread end 11, which is in contact with the structured zone S following the smooth zone G, is released when a fluid stream is blown into the tube 1.
  • the untwisted thread end 11 therefore only begins after the smooth zone G. If the tube 1 with the opening other than the one shown is directed against a nozzle 30, the structured zone S follows immediately after the thread insertion zone E, so that at same distance A, the untwisted thread end 11 becomes longer.
  • a thread insertion bevel 4 with two thread insertion grooves 5 is arranged at each end of the tube 1.
  • the two insertion grooves 5 have the effect that the thread end 11 can be placed across the opening of the tube 1 and find a guide surface in the insertion grooves 5. This ensures that the thread end 11 is blown into the tube 1 and not laterally next to the tube 1.
  • the conical surfaces of the thread insertion bevels 4 additionally reinforce this effect. Particularly in the case of arrangements in which the fluid flows in near the tube 1, it may be sufficient if only one of the two thread insertion aids, thread insertion slope 4 or thread insertion groove 5, is arranged on the tube 1 or the thread splicing device 20.
  • the nozzle 30 is arranged in FIG. 6 in the axial extension of the tube 1. Fluid, preferably air, is blown into the tube 1 through the nozzle 30. The fluid flows through the tube 1 and is set into a turbulent flow by the sharp-edged structure of the inner surface 2 of the tube 1, in which the thread end 11 is brought into a striking movement. The thread end 11 thereby strikes the aggressive structure of the inner surface 2 of the tube 1 and thus frees itself from the looping fibers. It is also possible that the nozzle 30 is arranged at the other end of the tube 1 and is designed as a suction air nozzle instead of, for example, a compressed air nozzle. However, the fluid is always introduced at one end of the tube 1 and flows through the entire tube 1 along its axis.
  • a more or less strong fluid pressure is selected depending on the strength of the thread 10 to be opened and / or on the strength of the rotation of the thread 10. This achieves the advantage of unscrewing the thread end 11 as gently as possible.
  • a clamp 23 on the thread splicing chamber 22 presses on the thread 10 at a clamping point K. This ensures that the thread end 11 is not inserted further into the tube 1 than intended by the fluid flow from the nozzle 30.
  • FIG. 7 shows an exemplary embodiment in which two tubes 1a and 1b are arranged on a rotatable part 24.
  • the rotatable part 24 can be brought into two different working positions, in which either the tube 1a or the tube 1b can receive the thread end 11.
  • the nozzle 30 is arranged in the axial alignment of the tube 1a, so that the thread end 11 is blown into the tube 1a by the fluid flow of the nozzle 30.
  • the inner surface 2 of the tube 1a is completely structured, while the structure of the inner surface 2 of the tube 1b is axially limited.
  • the tube 1a can be exchanged with the tube 1b by rotating the rotatable part 24 about an axis of rotation 25 in the direction of the arrow. After the rotatable part 24 has been rotated through 180 °, the fluid flow no longer flows through the tube 1a but rather through the tube 1b.
  • the two tubes 1a and 1b can differ both in the arrangement of the structure 3a, 3b, and in the thickness of the structure 3a, 3b, and thereby respond to the requirements of preparing the thread ends of different threads 10 as gently as possible.
  • the adjustment of the rotatable part 24 can be done both manually and e.g. mechanically with a service unit.
  • the thread splicing device 20 of FIG. 8 only one tube 1 is arranged in the rotatable part 24.
  • the axis of rotation 25 is arranged perpendicular to the longitudinal axis of the tube 1 and cuts it in the middle. If the rotatable part is rotated through 180 °, it is possible in a simple manner to bring the tube 1 into mutual use and thus to vary the length of the thread end 11 to be released.
  • a control device 31 which influences the inflow of the fluid, is connected upstream of the nozzle 30.
  • the inflow of the fluid from a pressure vessel 32 into the nozzle 30 is stopped after each dissolution process and is only permitted again when the dissolution process is repeated.
  • the control device 31 limits the fluid flow per thread end preparation to a time of less than 30 ms.
  • the flow of fluid depends on the strength of the rotation of the thread end 11. If the rotation of the thread end 11 is strong and / or non-uniform, ie if there are strong abdominal bands or if the rotation is both Z- and S-shaped, then a longer flow-through time is a dissolution of rotation than in the case of a loose rotation.
  • the fluid flows in at intervals, that is, the fluid flow is interrupted or weakened again and again for a short time, the result is the sudden impact of the fluid on the thread end 11 and the resulting acceleration peaks, by which the thread end 11 with great force against the sharp-edged structure of the Inner surface 2 of the tube 1 is thrown, a very good resolution of the thread end 11 and its rotation.
  • FIG. 9 shows a section through a thread splicing device 20, in which two tubes 1a and 1b are arranged in the rotatable part 24.
  • the axis of rotation 25 of the rotatable part 24 is arranged parallel and centrally to the longitudinal axes of the tubes 1a and 1b.
  • the invention is not restricted to the exemplary embodiments shown and described. So it is e.g. possible to arrange a number of tubes on a belt or chain, and to move the most suitable tube automatically or manually to the location of the fluid flow. It is also possible to use a microprocessor which, according to the program, selects the most suitable tube, the most suitable fluid inflow duration and the inflow profile depending on the thread quality.

Description

Die Erfindung betrifft eine Fadenspleißvorrichtung zum knotenfreien Verbinden von Fäden mit einer Fadenspleißkammer und einem, in einem Abstand von der Fadenspleißkammer angeordneten fluiddurchströmten Röhrchen zur Aufnahme eines Fadenendes zu dessen Vorbereitung für den Spleißvorgang, sowie ein Verfahren zur Fadenendenvorbereitung in einer solchen Fadenspleißvorrichtung.The invention relates to a thread splicing device for the knot-free connection of threads with a thread splicing chamber and a tube through which fluid flows, at a distance from the thread splicing chamber, for receiving a thread end for its preparation for the splicing process, and a method for thread end preparation in such a thread splicing device.

Die Verbindung von Fadenenden durch Spleißen erfordert zur Erlangung einer guten Qualität der Verbindung, daß die Vorbereitung der Fadenenden sorgfältig erfolgt. Das Fadenende muß über eine bestimmte Länge hinweg im wesentlichen frei von Drehungen sein, so daß es mit einem zweiten Fadenende, das ebenfalls im wesentlichen frei von Drehungen ist, in der Spinnvorrichtung gut verbunden werden kann.The connection of thread ends by splicing requires that the preparation of the thread ends is carried out carefully in order to obtain a good quality of the connection. The thread end must be substantially free of twists over a certain length, so that it can be easily connected to a second thread end, which is also essentially free of twists, in the spinning device.

Die Vorbereitung der Fadenenden erfolgt bekannterweise in Vorrichtungen, bei denen die Fadenenden einem Fluidstrom ausgesetzt werden, der quer zu den Fadenlängsachsen die Fadenenden mit Hilfe der dabei entstehenden Druck- oder Saugkraft erfaßt und sie derart verwirbelt, daß die Drehung in den Fadenenden aufgelöst wird.As is known, the preparation of the thread ends is carried out in devices in which the thread ends are exposed to a fluid flow which grips the thread ends transversely to the thread longitudinal axes with the help of the pressure or suction force which arises in the process and swirls them in such a way that the rotation is dissolved in the thread ends.

Im Folgenden soll immer nur die Vorbereitung eines Fadenendes beschrieben werden.In the following, only the preparation of a thread end will be described.

Bekannt ist, daß der Fluidstrom unter einem Winkel zur Längsachse in ein Röhrchen einmündet, in das er das Fadenende zieht oder drückt und das Fadenende durch die dabei entstehende turbulente Strömung entgegen seiner Drehung aufgedreht wird. Die das Fadenende bildenden Fasern werden aufgrund dieser Strömung freigelegt und spreizen sich ab. Herkömmliche Ringgarne lassen sich auf diese Weise gut spleißen.It is known that the fluid flow opens at an angle to the longitudinal axis into a tube into which it pulls or pushes the thread end and the thread end is turned against its rotation by the resulting turbulent flow. The fibers forming the end of the thread are exposed due to this flow and spread out. Conventional ring yarns can be spliced well in this way.

Schwieriger ist Spleißen von Mehrfachfaden oder Zwirn, der aus zwei oder mehreren umeinandergedrehten Einzelfäden besteht und die Drehung der Einzelfäden in entgegengesetzter Richtung zur Drehung des aus den umeinandergedrehten Einzelfäden bestehenden Zwirns verläuft. Mit einer solchen Verbesserung beschäftigt sich die DE 3.417.367 Al. Gemäß dieser bekannten Bauart ist vorgesehen, daß in jedes Düsenrohr unter einem Winkel zur Längsachse des Düsenrohres eine Fluidströmung eingebracht wird, die auf eine im Düsenrohr angeordnete Prallplatte auftrifft. Beim Auftreffen des Fluidstrahles auf die Prallplatte werden turbulente Strömungen erzeugt, in denen das Fadenendteil nichtwirbelnde Bewegungen, d.h. Schleuderbewegungen und Schwingungen ausführt und die Drehungen der einzelnen Fäden rückgedreht werden.It is more difficult to splic multiple thread or twine, which consists of two or more twisted individual threads and the rotation of the single threads runs in the opposite direction to the twist of the twisted thread consisting of twisted individual threads. DE 3,417,367 A1 is concerned with such an improvement. According to this known design, it is provided that a fluid flow is introduced into each nozzle tube at an angle to the longitudinal axis of the nozzle tube, which fluid impinging on a baffle plate arranged in the nozzle tube. When the fluid jet strikes the baffle plate, turbulent flows are generated in which the thread end part has non-whirling movements, i.e. Spin movements and vibrations and the twists of the individual threads are reversed.

Eine andere bekannte Vorrichtung (DE 3.151.270 Al) schlägt für denselben Zweck eine intensivere mechanische und pneumatische Beanspruchung der Fadenenden vor, um die Fadenenden in Einzelfasern aufzulösen, zu reinigen und zu spreizen. Dies geschieht dadurch, daß schräg zur Längsrichtung der Einzelfasern strömendes Druckgas bei gleichzeitiger schlagender und in Richtung auf das Fadenende reißender, zerrender, mechanischer und pneumatischer Beanspruchung das Fadenende in Schwingungen versetzt wird. Dieses Verfahren ist verhältnismäßig aufwendig. Außerdem besteht die Gefahr, daß durch diese intensive gewaltsame Auflösung der Fadenenden die einzelnen Fasern geschädigt werden und nicht mehr für eine gute Spleißverbindung geeignet sind.Another known device (DE 3.151.270 A1) proposes a more intensive mechanical and pneumatic loading of the thread ends for the same purpose in order to dissolve, clean and spread the thread ends in individual fibers. This is done by the fact that the compressed gas flowing obliquely to the longitudinal direction of the individual fibers with simultaneous beating and tearing, pulling, pulling, mechanical and pneumatic loading in the direction of the thread end causes the thread end to vibrate. This process is relatively complex. In addition, there is a risk that this intensive violent dissolution of the thread ends will damage the individual fibers and are no longer suitable for a good splice connection.

Ein besonderes Problem für das Spleißen stellen die nach neuen Spinnverfahren hergestellten Fäden dar. Dies sind insbesondere nach dem Offenend-Rotorspinnverfahren, Faserumwindespinnverfahren oder ähnliche neue Spinnverfahren hergestellte Fäden. Bei dieser Art der Garnerzeugung entsteht keine einheitliche Drehung im Faden. Außerdem weisen diese Fäden häufig Umwindungen durch Einzelfasern auf (sog. Bauchbinden), die sich außerordentlich schwer auflösen lassen. Die bisher bekannten Spleißverfahren haben sich als wenig geeignet dafür erwiesen, weshalb es noch heute ein Problem ist, derartige Garne zu spleißen.A particular problem for splicing is represented by the threads produced by new spinning processes. These are in particular threads produced by the open-end rotor spinning process, fiber wound spinning processes or similar new spinning processes. With this type of yarn production there is no uniform twist in the thread. In addition, these threads often have wraps through individual fibers (so-called abdominal bandages) that are extremely difficult to dissolve. The previously known splicing methods have proven to be unsuitable for this, which is why it is still a problem today to splice such yarns.

Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren und eine Vorrichtung zu schaffen, die das Spleißen jeglicher Art von Garnen in einfacher Weise ermöglicht.It is therefore an object of the present invention to provide a method and a device which enables the splicing of any type of yarn in a simple manner.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Röhrchen eine rauhe Innenfläche aufweist, die das Fadenende schlagend berührt, und daß das Röhrchen von einem Fluid turbulent durchströmt wird und das Fadenende durch die turbulente Strömung solange gegen die strukturierte Innenfläche des Röhrchens geschlagen wird, bis das Fadenende drehungsfrei ist.The object is achieved in that the tube has a rough inner surface that touches the thread end, and that the tube is turbulently flowed through by a fluid and the thread end is struck by the turbulent flow against the structured inner surface of the tube until that Thread end is rotation-free.

In einer vorteilhaften Ausgestaltung wird die Innenfläche des Röhrchens durch Kordelung aufgerauht. Dies stellt eine wirtschaftliche Oberflächenbehandlung der Innenfläche des Röhrchens dar. Eine unregelmäßige Anordnung der Kanten erleichtert die Aufdrehung des Fadens, da sich der Faden nicht so leicht in Täler in der Struktur schmiegen kann. Ist die Struktur scharfkantig ausgebildet, wird das Aufdrehen des Fadenendes zusätzlich erleichtert. Zur schonenden Aufbereitung des Fadenendes ist die rauh strukturierte Innenfläche des Röhrchens axial und/oder an einem Teil des Umfangs begrenzt angeordnet. Hierdurch ist eine exakt festgelegte Zone des Fadenendes, welches aufgedreht werden soll, vorbestimmt. Weist das Röhrchen einen Innendurchmesser auf, der das mehrfache der Fadenstärke beträgt, so ist ein sicheres Einführen des Fadenendes in das Röhrchen sowie eine ausreichende Bewegung des Fadens im Röhrchen gewährleistet. Entspricht der Innendurchmesser maximal der halben Länge des in das Röhrchen hineinragenden Fadenendes, so sind sehr gute Aufdrehergebnisse des Fadenendes zu erzielen.In an advantageous embodiment, the inner surface of the tube is roughened by cording. This represents an economical surface treatment of the inner surface of the tube. An irregular arrangement of the edges facilitates the untwisting of the thread, since the thread cannot so easily nestle into valleys in the structure. If the structure is sharp-edged, unscrewing the thread end is also made easier. For the gentle preparation of the thread end, the roughly structured inner surface of the tube is arranged axially and / or on a part of the circumference. As a result, a precisely defined zone of the thread end, which is to be opened, is predetermined. If the tube has an inner diameter that is several times the thread size, then it is safe to insert the thread end into the tube as well as sufficient movement of the thread in the tube. If the inside diameter corresponds to a maximum of half the length of the thread end protruding into the tube, very good results of unscrewing the thread end can be achieved.

Eine schnelle Anpassung an unterschiedliche Längen des aufzudrehenden Fadenendes ist durch eine verschiebbare Anordnung des Röhrchens in axialer Richtung zu erzielen. In einer vorteilhaften Ausbildung ist an dem der Fadenspleißkammer zugewandten Ende des Röhrchens eine Fadeneinführzone mit gegen das Ende des Röhrchens zunehmendem Durchmesser beispielsweise in Form einer konischen Erweiterung angeordnet. Ist zudem die Oberfläche der Fadeneinführzone glatt ausgebildet, so wird das Einführen des Fadenendes in das Röhrchen erleichtert. Durch einen Schlitz, der in der Fadeneinführzone in Richtung der Längsachse des Röhrchens angeordnet ist, wird das Einführen des Fadenendes zudem erleichtert.A quick adjustment to different lengths of the thread end to be opened can be achieved by a displaceable arrangement of the tube in the axial direction. In an advantageous embodiment, a thread insertion zone with a diameter increasing towards the end of the tube is arranged, for example in the form of a conical widening, at the end of the tube facing the thread splicing chamber. If the surface of the thread insertion zone is also smooth, the insertion of the thread end into the tube is facilitated. A slot, which is arranged in the thread insertion zone in the direction of the longitudinal axis of the tube, also facilitates the insertion of the thread end.

Ist das Röhrchen derart ausgebildet, daß es wechselseitig in die Fadensspleißvorrichtung einsetzbar ist, so wird in vorteilhafter Weise gewährleistet, daß Röhrchen mit unterschiedlicher Charakteristik der Struktur der Innenfläche an unterschiedliche Fadenqualitäten anpaßbar sind. Dabei wird das Röhrchen derart gedreht, daß die Fadeneinführung einmal an dem einen Ende des Röhrchens geschieht und nach dem Drehen des Röhrchens um 180° an dem anderen Ende. Ist ein drehbares Teil an der Fadenspleißvorrichtung angeordnet, in dem wenigstens ein Röhrchen angeordnet ist, so ist das Röhrchen zu Reinigungszwecken oder für einen wechselseitigen Einsatz schnell und einfach durchzuführen. Sind in dem drehbaren Teil Röhrchen mit Innenflächen von jeweils unterschiedlicher Stärke der Rauhigkeit angeordnet, so ist es in vorteilhafter Weise möglich, auf unterschiedliche Fadenqualitäten das jeweils passende Röhrchen zum Einsatz zu bringen. Dies ist insbesondere an Maschinen vorteilhaft, an denen unterschiedliche Fadenqualitäten produziert werden. Gleiches gilt für in dem drehbaren Teil angeordnete Röhrchen mit Innenflächen mit jeweils unterschiedlichen Zonen der Rauhigkeit.If the tube is designed such that it can be inserted alternately into the thread splicing device, it is advantageously ensured that tubes with different characteristics of the structure of the inner surface can be adapted to different thread qualities. The tube is rotated in such a way that the thread is inserted once at one end of the tube and after rotating the tube through 180 ° at the other end. If a rotatable part is arranged on the thread splicing device, in which at least one tube is arranged, the tube can be carried out quickly and easily for cleaning purposes or for mutual use. If tubes with inner surfaces of different strengths of roughness are arranged in the rotatable part, it is advantageously possible to use the appropriate tube for different thread qualities. This is particularly advantageous on machines on which different thread qualities are produced. The same applies to tubes arranged in the rotatable part with inner surfaces with different zones of roughness.

Das erfindungsgemäße Verfahren besteht darin, daß das Röhrchen von einem Fluid turbulent durchströmt wird und das Fadenende durch die turbulente Strömung gegen die strukturierte Innenfläche des Röhrchens geschlagen wird, so daß das Fadenende drehungsfrei wird. Vorteilhaft hierbei ist, daß selbst hartnäckige Drehungen, wie sie beispielsweise bei Zwirnen oder Rotorgarnen mit Bauchbinden auftreten, durch die schlagende Berührung der strukturierten Innenfläche relativ schonend aufgelöst werden. Durch eine Begrenzung der Dauer der Fluiddurchströmung pro Fadenendenvorbereitung auf eine bestimmte Zeit, wird in Abhängigkeit von der jeweiligen Fadenqualität ein gleichmäßiges Aufdrehergebnis erzielt. Außerdem wird in vorteilhafter Weise der Fluidverbrauch begrenzt. Als vorteilhaft hat sich für die Dauer der Fluiddurchströmung pro Fadenendenvorbereitung eine Zeit von weniger als 30 msec erwiesen.The method according to the invention consists in that a fluid flows through the tube turbulently and the end of the thread is knocked against the structured inner surface of the tube by the turbulent flow, so that the end of the thread becomes free of rotation. The advantage here is that even stubborn twists, such as occur with twists or rotor yarns with belly bandages, are relatively gently resolved by the striking contact of the structured inner surface. By limiting the duration of the fluid flow per thread end preparation to a certain time, a uniform opening result is achieved depending on the thread quality. In addition, the fluid consumption is advantageously limited. A time of less than 30 msec has proven to be advantageous for the duration of the fluid flow per thread end preparation.

Wird das Fluid pro Fadenendenvorbereitung in Intervallen eingeströmt, wird die schlagende Berührung des Fadenendes an der strukturierten Innenfläche des Röhrchen durch stets erneut auf das Fadenende einwirkende Beschleunigungskräfte erhöht.If the fluid flows in at intervals for preparation of the thread end, the striking contact of the thread end on the structured inner surface of the tube is increased by acceleration forces which always act again on the thread end.

Es hat sich erwiesen, daß, je stärker der aufzudrehende Faden ist und/oder je fester die Drehung des Fadens ist, eine längere Dauer der Fluiddurchströmung vorteilhaft ist. Hierdurch wird das Fadenende längere Zeit gegen die Innenfläche des Röhrchens geschlagen. Ebenso hat sich herausgestellt, daß eine größere Rauhigkeit der Innenfläche des Röhrchens vorteilhafterweise gewählt wird, je stärker der aufzudrehende Faden ist und/oder je fester die Drehung des Fadens ist. Eine weitere Möglichkeit der Beeinflussung der Fadenaufdrehung in Abhängigkeit von der Fadenqualität ist die Wahl eines stärkeren Fluiddrucks. Auch hierdurch ist eine bessere Aufdrehung des Fadenendes erzielbar.It has been found that the longer the thread to be opened and / or the tighter the rotation of the thread, the longer the duration of the fluid flow is advantageous. This will knock the end of the thread against the inside surface of the tube for a long time. It has also been found that the greater the roughness of the inner surface of the tube is advantageously chosen, the stronger the thread to be opened and / or the tighter the rotation of the thread. Another possibility of influencing the thread twist as a function of the thread quality is the choice of a stronger fluid pressure. This also enables a better untwisting of the thread end.

Wird das Fluid an einem Ende des Röhrchens eingeleitet und das gesamte Röhrchen längs seiner Achse durchströmt, so ist in vorteilhafter Weise eine optimale Ausnutzung der Länge des Röhrchens ermöglicht. Die Einführung des Fadenendes in das Röhrchen wird gegenüber einer seitlichen Einleitung des Fluids in das Röhrchen deutlich erleichtert, da das Fadenende in das Röhrchen geblasen und nicht gesaugt wird. Im übrigen ergibt eine derartige Durchströmung des Röhrchens eine wesentlich einfachere Konstruktion der Fadenspleißvorrichtung.If the fluid is introduced at one end of the tube and the entire tube is flowed along its axis, the length of the tube can be optimally utilized in an advantageous manner. The introduction of the thread end into the tube is made considerably easier compared to a lateral introduction of the fluid into the tube, since the thread end is blown into the tube and is not sucked. Moreover, such a flow through the tube results in a much simpler construction of the thread splicing device.

Überraschenderweise hat sich gezeigt, daß mit dieser Fadenspleißvorrichtung und dem Verfahren zur Fadenendenvorbereitung mit einem geringen mechanischen Aufwand an der Vorrichtung sehr gute Spleißergebnisse auch bei bisher nur schwierig von ihrer Umwindung zu lösenden Fadenenden erzielen lassen.Surprisingly, it has been shown that with this thread splicing device and the method for preparing the thread ends, very little splicing results can be achieved with little mechanical outlay on the device, even with thread ends that have so far been difficult to unwind.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnungen beschrieben. Es zeigt

  • Fig. 1 bis 3 Längsschnitte durch ein Röhrchen;
  • Fig. 4 Draufsicht auf ein Röhrchen;
  • Fig. 5 Querschnitt durch ein geteiltes Röhrchen;
  • Fig. 6 bis 8 Längsschnitte durch Fadenspleißvorrichtungen mit montierten Röhrchen; und
  • Fig. 9 Querschnitt durch eine Fadenspleißvorrichtung mit montierten Röhrchen.
Embodiments of the invention are described below with reference to the drawings. It shows
  • 1 to 3 longitudinal sections through a tube;
  • Fig. 4 top view of a tube;
  • Fig. 5 cross section through a divided tube;
  • 6 to 8 are longitudinal sections through thread splicing devices with attached tubes; and
  • Fig. 9 cross section through a thread splicing device with mounted tubes.

Fig. 2 zeigt eine weitere erfindungsgemäße Ausführung des Röhrchens 1. An der Fadeneinführschräge 4 ist eine vorteilhafte Fadeneinführnut 5 angeordnet, in die sich das Fadenende 11 legt, bevor es in das Röhrchen 1 gelangt. Diese Fadeneinführnut 5 stabilisiert durch ihre nutförmige Gestaltung das Fadenende 11 und verhindert ein seitliches Ausweichen und damit einen fehlerhaften Vorbereitungsversuch.2 shows a further embodiment of the tube 1 according to the invention. An advantageous thread insertion groove 5 is arranged on the thread insertion bevel 4, into which the thread end 11 lies before it reaches the tube 1. This thread insertion groove 5 stabilizes the thread end 11 due to its groove-shaped design and prevents lateral evasion and thus an incorrect preparation attempt.

In dem Röhrchen 1 der Figur 2 ist im Anschluß an eine Fadeneinführzone E an der Innenfläche 2 zunächst eine glatte Zone G angeordnet. Auf diese glatte Zone G folgt eine strukturierte Zone S. Die strukturierte Zone S der Innenfläche 2 ist axial begrenzt. Durch Einsatz eines derartigen Röhrchens 1 wird die Länge des von seiner Drehung zu lösenden Fadenendes 11 begrenzt. Eine Auflösung der Drehung erfolgt lediglich bis in den Grenzbereich zwischen glatter und strukturierter Zone G, S. Bei gleicher Länge des eingeführten Fadenendes 11 wie bei einem Röhrchen 1 der Figur 1 wird bei einem Röhrchen 1 der Figur 2 eine kürzere Länge des Fadenendes 11 von seiner Drehung gelöst. Der Einsatz unterschiedlicher Röhrchen 1 erlaubt eine einfache Umstelllung einer Fadenspleißvorrichtung 20 auf Fäden unterschiedlicher Faserlängen, von denen die Länge des aufzulösenden Fadenendes 11 abhängig ist.A smooth zone G is initially arranged in the tube 1 of FIG. 2 following a thread insertion zone E on the inner surface 2. This smooth zone G is followed by a structured zone S. The structured zone S of the inner surface 2 is axially limited. By using such a tube 1, the length of the thread end 11 to be released from its rotation is limited. The rotation is only resolved up to the border area between smooth and structured zone G, S. With the same length of the inserted thread end 11 as for a tube 1 of FIG. 1, a shorter length of the thread end 11 of the tube 1 of FIG Rotation solved. The use of different tubes 1 allows a thread splicing device 20 to be easily converted to threads of different fiber lengths, on which the length of the thread end 11 to be broken depends.

Das Ausführungsbeispiel eines Röhrchens 1 in Figur 3 stellt eine Innenfläche 2 dar, die eine Begrenzung der strukturierten Zone S am Umfang besitzt. Die glatte Zone G der Innenfläche 2 befindet sich am restlichen Teil des inneren Umfangs des Röhrchens 1. Bei Fäden mit mittelfester Umschlingung der Fasern führt eine derartige Ausführung zu einer schonenderen Aufdrehung des Fadenendes 11, als es bei einer durchgehend strukturierten rauhen Innenfläche 3, 6 des Röhrchens 1 der Fall wäre.The exemplary embodiment of a tube 1 in FIG. 3 represents an inner surface 2 which has a boundary of the structured zone S on the circumference. The smooth zone G of the inner surface 2 is located on the remaining part of the inner circumference of the tube 1. In the case of threads with a medium tight wrap around the fibers, such a design leads to a gentler untwisting of the thread end 11 than is the case with a continuously structured rough inner surface 3, 6 of the Tube 1 would be the case.

Eine Kombination der Anordnung der rauhen Innenfläche 3, 6 der Röhrchen 1 wie sie in Figur 2 und 3 dargestellt sind, ist vorteilhaft, wenn ein begrenztes Stück des Fadenendes 11 schonend aufgedreht werden soll, da das Fadenende 11 nicht ständig der rauhen Innenfläche 3, 6 ausgesetzt ist. Die Struktur 3 bzw. 6 kann abhängig von der Fadenart streifenförmig linear oder spiralförmig ausgebildet sein, wenn die rauhe Innenfläche 3, 6 des Röhrchens 1 axial und an einem Teil des Umfangs der Innenfläche 2 des Röhrchens 1 angeordnet ist.A combination of the arrangement of the rough inner surface 3, 6 of the tubes 1, as shown in FIGS. 2 and 3, is advantageous if a limited piece of the thread end 11 is to be gently opened, since that Thread end 11 is not constantly exposed to the rough inner surface 3, 6. The structure 3 or 6 can, depending on the type of thread, be linear or spiral in the form of strips if the rough inner surface 3, 6 of the tube 1 is arranged axially and on part of the circumference of the inner surface 2 of the tube 1.

Eine Struktur 6 des Röhrchens 1 in Figur 3 ist anders als in den Figuren 1 und 2 nicht mit Körnern 3 erzielt, sondern durch eine Kordelung der Oberfläche. Die Strukturierung der Oberfläche ist auch mit einer Laserbestrahlung oder Erodierung möglich. Diese Bearbeitung der Innenfläche 2 ist oftmals fertigungstechnisch kostengünstiger und haltbarer durchzuführen als eine Anordnung von Material an der Innenfläche 2.Unlike in FIGS. 1 and 2, a structure 6 of the tube 1 in FIG. 3 is not achieved with grains 3, but rather by means of a cord on the surface. The structuring of the surface is also possible with laser radiation or eroding. This processing of the inner surface 2 is often less expensive and more durable than an arrangement of material on the inner surface 2.

Eine schonende Aufdrehung des Fadenendes 11 ist gemäß den Figuren 1 bis 3 möglich, indem die Struktur der Innenfläche 2 mehr oder weniger grob gewählt wird. Je gröber und stärker der Faden 10 und je enger und fester die Drehung des Fadens 10 ist, desto gröber, aggressiver und großflächiger muß die Struktur an der Innenfläche 2 des Röhrchens 1 sein. Die mechanische Belastung, der das Fadenende 11 ausgesetzt wird, wird durch die geeignete Wahl der Struktur auf ein Mindestmaß beschränkt.A gentle untwisting of the thread end 11 is possible according to FIGS. 1 to 3, in that the structure of the inner surface 2 is chosen more or less roughly. The coarser and stronger the thread 10 and the tighter and tighter the rotation of the thread 10, the coarser, more aggressive and larger the structure on the inner surface 2 of the tube 1 must be. The mechanical load to which the thread end 11 is exposed is minimized by the appropriate choice of the structure.

Figur 4 stellt eine Draufsicht auf das Röhrchen 1 dar, bei dem Körner 3 an der Innenfläche 2 angeordnet sind. Dabei ist zu erkennen, daß die scharfen Kanten der Körner 3 in die Durchgangsöffnung des Röhrchens 1 ragen. Das Fadenende 11 bleibt mit Teilen seiner Fasern an diesen scharfen Kanten hängen und löst somit, während es aufgrund des turbulent hindurchströmenden Fluidstroms in schleudernde Bewegungen versetzt wird, den Verbund, der durch die Fasern gebildet wird, auf. Das Fadenende 11 wird dadurch zu einem Faserbüschel mit abgespreizten Fasern gebildet. Die Länge des Faserbüschels ist begrenzt durch die mittlere Faserlänge, da die Fasern des Fadenendes 11 mit einem Ende in den Faden eingebunden bleiben müssen, um von dem Fluidstrom nicht ganz aus dem Faden entfernt zu werden.FIG. 4 shows a top view of the tube 1, in which grains 3 are arranged on the inner surface 2. It can be seen that the sharp edges of the grains 3 protrude into the through opening of the tube 1. The end of the thread 11 sticks to these sharp edges with parts of its fibers and thus, while being set into spinning movements due to the turbulent flow of fluid, dissolves the bond formed by the fibers. The thread end 11 is thereby formed into a bundle of fibers with spread fibers. The length of the fiber bundle is limited by the mean fiber length, since the fibers of the thread end 11 must remain bound at one end in the thread in order not to be completely removed from the thread by the fluid flow.

Ein freier Innendurchmesser D beträgt das Mehrfache der Fadenstärke d, und entspricht maximal der halben Länge des in das Röhrchen 1 hineinragenden Fadenendes 11. Dadurch wird gewährleistet, daß das Fadenende 11 einerseits genügend Raum für seine schlagende Bewegungen hat und andererseits aber die rauhe Innenfläche 3, 6 mit einer ausreichenden Länge des Fadenendes 11 berührt.A free inner diameter D is several times the thread thickness d, and corresponds to a maximum of half the length of the thread end 11 protruding into the tube 1. This ensures that the thread end 11 on the one hand has enough space for its striking movements and on the other hand the rough inner surface 3, 6 touches with a sufficient length of the thread end 11.

In Fig. 5 ist eine geteilte Ausführung des Röhrchens 1 in einem Schnitt quer zur Längsachse gezeigt. Die Röhrchenhälften 1′ und 1˝ sind durch Klebstoff, Verschraubung oder Klemmung in der Fadenspleißvorrichtung 20 miteinander verbunden. Die Teilung des Röhrchens 1 ermöglicht eine sehr einfache Anbringung der Struktur an der Innenfläche 2 des Röhrchens 1. Sowohl die Anordnung von Körnern 3 als auch die Bearbeitung der Innenflächen 2 entsprechend Figur 3 ist aufgrund der guten Zugänglichkeit stark vereinfacht. Bei Verwendung einer lösbaren Verbindung ist außerdem eine Reinigung oder Instandsetzung der Struktur einfacher möglich als bei nicht teilbaren Röhrchen 1.In Fig. 5, a split version of the tube 1 is shown in a section transverse to the longitudinal axis. The tube halves 1 'and 1˝ are connected to each other by adhesive, screwing or clamping in the thread splicing device 20. The division of the tube 1 enables the structure to be attached to the inner surface 2 of the tube 1 in a very simple manner. Both the arrangement of grains 3 and the processing of the inner surfaces 2 according to FIG. 3 are greatly simplified owing to the good accessibility. When using a detachable connection, cleaning or repair of the structure is also easier than with non-separable tubes 1.

Ein Längsschnitt durch die Fadenspleißvorrichtung 20 und das Röhrchen 1 in Fig. 6 zeigt in einem Ausführungsbeispiel die Anordnung des Röhrchens 1 in der Fadenspleißvorrichtung 20. Das Röhrchen 1 ist in der Fadenspleißvorrichtung 20 axial stufenlos verstellbar befestigt. Es ist hier durch eine Schraube 21, die gegen die Außenwand des Röhrchens 1 drückt, geklemmt. Durch Lösen der Schraube 21 und Verschieben des Röhrchens 1 in axialer Richtung ist ein Abstand A einstellbar. Der Abstand A bezeichnet die Entfernung eines Fadenklemmpunktes K von dem Röhrchen 1, die in Richtung der Längsachse des Röhrchens 1 gemessen wird. Durch Veränderung des Abstandes A ist es möglich, bei gleichbleibender Länge des Fadens 10 vom Klemmpunkt K bis zum Fadenende 11, den Bereich, in dem das Fadenende 11 aufgedreht wird, einzustellen. Das Fadenende 11 ragt bei einer Änderung des Abstandes A mit einem mehr oder weniger langen Stück in das Röhrchen 1 bzw. an die strukturierte Zone S.A longitudinal section through the thread splicing device 20 and the tube 1 in FIG. 6 shows in one exemplary embodiment the arrangement of the tube 1 in the thread splicing device 20. The tube 1 is fastened in the thread splicing device 20 in an axially steplessly adjustable manner. It is clamped here by a screw 21 which presses against the outer wall of the tube 1. A distance A can be set by loosening the screw 21 and moving the tube 1 in the axial direction. The distance A denotes the distance of a thread clamping point K from the tube 1, which is measured in the direction of the longitudinal axis of the tube 1. By changing the distance A, it is possible, with the length of the thread 10 remaining from the clamping point K to the thread end 11, to set the region in which the thread end 11 is untwisted. When the distance A changes, the thread end 11 projects with a more or less long piece into the tube 1 or the structured zone S.

Das in Fig. 6 gezeigte Beispiel einer Fadenspleißvorrichtung 20 verwendet ein Röhrchen 1, das wechselseitig einsetzbar ist. Dieses Röhrchen 1 hat den Vorteil, daß der Bereich, in dem das Fadenende 11 aufgedreht werden soll, durch Wenden des Röhrchens wesentlich vergrößert werden kann, wobei die Lage der Fadeneinführzone E zu einer Fadenspleißkammer 22 im wesentlichen gleich bleibt.The example of a thread splicing device 20 shown in FIG. 6 uses a tube 1 which can be used alternately. This tube 1 has the advantage that the area in which the thread end 11 is to be opened can be substantially enlarged by turning the tube, the position of the thread insertion zone E relative to a thread splicing chamber 22 remaining essentially the same.

In der dargestellten Einbauart folgt, ausgehend von der Seite der Fadeneinführung, auf die Fadeneinführzone E mit der Fadeneinführhilfe 5 an der Innenfläche 2 des Röhrchens 1 eine glatte Zone G. An dieser Zone G ist ein Aufdrehen des Fadenendes 11 nicht möglich, da sie weniger aggressiv ist als die strukturierte Zone S. Die Drehung des Fadenendes 11, das mit der auf die glatte Zone G folgende strukturierte Zone S Berührung hat, wird beim Einblasen eines Fluidstroms in das Röhrchen 1 aufgelöst. In der hier gezeigten Ausführungsform beginnt somit das aufgedrehte Fadenende 11 erst nach der glatten Zone G. Ist das Röhrchen 1 mit der anderen als der gezeigten Öffnung gegen eine Düse 30 gerichtet, so folgt sofort nach der Fadeneinführungszone E die strukturierte Zone S, so daß bei gleichem Abstand A das aufgedrehte Fadenende 11 länger wird.In the type of installation shown, starting from the side of the thread insertion, the thread insertion zone E with the thread insertion aid 5 on the inner surface 2 of the tube 1 is followed by a smooth zone G. In this zone G, unscrewing the thread end 11 is not possible since it is less aggressive is as the structured zone S. The rotation of the thread end 11, which is in contact with the structured zone S following the smooth zone G, is released when a fluid stream is blown into the tube 1. In the embodiment shown here, the untwisted thread end 11 therefore only begins after the smooth zone G. If the tube 1 with the opening other than the one shown is directed against a nozzle 30, the structured zone S follows immediately after the thread insertion zone E, so that at same distance A, the untwisted thread end 11 becomes longer.

Damit bei jeder der Anordnungsmöglichkeiten des Röhrchens 1 das Fadenende 11 sicher in das Röhrchen 1 eingeführt wird, ist an jedem Ende des Röhrchens 1 eine Fadeneinführschräge 4 mit jeweils zwei Fadeneinführnuten 5 angeordnet. Die beiden Einführnuten 5 bewirken, daß das Fadenende 11 quer über die Öffnung des Röhrchens 1 gelegt werden kann und in den Einführnuten 5 eine Führungsfläche finden. Dadurch wird sichergestellt, daß das Fadenende 11 in das Röhrchen 1 und nicht seitlich neben das Röhrchen 1 geblasen wird. Die konischen Flächen der Fadeneinführschrägen 4 verstärken diesen Effekt zusätzlich. Besonders bei Anordnungen, bei denen die Fluideinströmung nahe dem Röhrchen 1 erfolgt, kann es schon ausreichend sein, wenn an dem Röhrchen 1 oder der Fadenspleißvorrichtung 20 lediglich eine der beiden Fadeneinführhilfen, Fadeneinführschräge 4 oder Fadeneinführnut 5, angeordnet ist. Die Düse 30 ist in Fig. 6 in der axialen Verlängerung des Röhrchens 1 angeordnet. Durch die Düse 30 wird Fluid, vorzugsweise Luft, in das Röhrchen 1 geblasen. Das Fluid strömt durch das Röhrchen 1 und wird durch die scharfkantige Struktur der Innenfläche 2 des Röhrchens 1 in eine turbulente Strömung versetzt, in der das Fadenende 11 in eine schlagende Bewegung gebracht wird. Das Fadenende 11 schlägt dadurch an die aggressive Struktur der Innenfläche 2 des Röhrchens 1 und befreit sich somit von den umschlingenden Fasern. Es ist ebenso möglich, daß die Düse 30 am anderen Ende des Röhrchens 1 angeordnet ist und anstelle z.B. einer Druckluftdüse als eine Saugluftdüse ausgebildet ist. Das Fluid wird jedoch immer an einem Ende des Röhrchens 1 eingeleitet und durchströmt das gesamte Röhrchen 1 längs seiner Achse.So that the thread end 11 is securely inserted into the tube 1 in each of the arrangement possibilities of the tube 1, a thread insertion bevel 4 with two thread insertion grooves 5 is arranged at each end of the tube 1. The two insertion grooves 5 have the effect that the thread end 11 can be placed across the opening of the tube 1 and find a guide surface in the insertion grooves 5. This ensures that the thread end 11 is blown into the tube 1 and not laterally next to the tube 1. The conical surfaces of the thread insertion bevels 4 additionally reinforce this effect. Particularly in the case of arrangements in which the fluid flows in near the tube 1, it may be sufficient if only one of the two thread insertion aids, thread insertion slope 4 or thread insertion groove 5, is arranged on the tube 1 or the thread splicing device 20. The nozzle 30 is arranged in FIG. 6 in the axial extension of the tube 1. Fluid, preferably air, is blown into the tube 1 through the nozzle 30. The fluid flows through the tube 1 and is set into a turbulent flow by the sharp-edged structure of the inner surface 2 of the tube 1, in which the thread end 11 is brought into a striking movement. The thread end 11 thereby strikes the aggressive structure of the inner surface 2 of the tube 1 and thus frees itself from the looping fibers. It is also possible that the nozzle 30 is arranged at the other end of the tube 1 and is designed as a suction air nozzle instead of, for example, a compressed air nozzle. However, the fluid is always introduced at one end of the tube 1 and flows through the entire tube 1 along its axis.

In Abhängigkeit von der Stärke des aufzudrehenden Fadens 10 und/oder von der Festigkeit der Drehung des Fadens 10 wird ein mehr oder weniger starker Fluiddruck gewählt. Hiermit wird der Vorteil einer möglichst schonenden Aufdrehung des Fadenendes 11 erreicht.A more or less strong fluid pressure is selected depending on the strength of the thread 10 to be opened and / or on the strength of the rotation of the thread 10. This achieves the advantage of unscrewing the thread end 11 as gently as possible.

Eine Klemme 23 an der Fadenspleißkammer 22 drückt an einem Klemmpunkt K auf den Faden 10. Hierdurch wird gewährleistet, daß das Fadenende 11 durch den Fluidstrom aus der Düse 30 nicht weiter als beabsichtigt in das Röhrchen 1 eingeführt wird.A clamp 23 on the thread splicing chamber 22 presses on the thread 10 at a clamping point K. This ensures that the thread end 11 is not inserted further into the tube 1 than intended by the fluid flow from the nozzle 30.

In Fig. 7 ist ein Ausführungsbeispiel dargestellt, bei dem zwei Röhrchen 1a und 1b an einem drehbaren Teil 24 angeordnet sind. Das drehbare Teil 24 ist in zwei unterschiedliche Arbeitsstellungen bringbar, in denen entweder das Röhrchen 1a oder das Röhrchen 1b das Fadenende 11 aufnehmen kann. Die Düse 30 ist in der axialen Flucht des Röhrchens 1a angeordnet, so daß das Fadenende 11 durch den Fluidstrom der Düse 30 in das Röhrchen 1a geblasen wird. Die Innenfläche 2 des Röhrchens 1a ist vollständig strukturiert, während die Struktur der Innenfläche 2 des Röhrchens 1b axial begrenzt ist. Durch eine Drehung des drehbaren Teil 24 um eine Drehachse 25 in Pfeilrichtung ist das Röhrchen 1a mit dem Röhrchen 1b auswechselbar. Nach der Drehung des drehbaren Teils 24 um 180° wird nicht mehr das Röhrchen 1a sondern das Röhrchen 1b von dem Fluidstrom durchströmt.7 shows an exemplary embodiment in which two tubes 1a and 1b are arranged on a rotatable part 24. The rotatable part 24 can be brought into two different working positions, in which either the tube 1a or the tube 1b can receive the thread end 11. The nozzle 30 is arranged in the axial alignment of the tube 1a, so that the thread end 11 is blown into the tube 1a by the fluid flow of the nozzle 30. The inner surface 2 of the tube 1a is completely structured, while the structure of the inner surface 2 of the tube 1b is axially limited. The tube 1a can be exchanged with the tube 1b by rotating the rotatable part 24 about an axis of rotation 25 in the direction of the arrow. After the rotatable part 24 has been rotated through 180 °, the fluid flow no longer flows through the tube 1a but rather through the tube 1b.

Die beiden Röhrchen 1a und 1b können sich sowohl in der Anordnung der Struktur 3a, 3b, als auch in der Stärke der Struktur 3a, 3b unterscheiden und dadurch auf die Erfordernisse einer möglichst schonenden Fadenendenvorbereitung von unterschiedlichen Fäden 10 eingehen.The two tubes 1a and 1b can differ both in the arrangement of the structure 3a, 3b, and in the thickness of the structure 3a, 3b, and thereby respond to the requirements of preparing the thread ends of different threads 10 as gently as possible.

Die Verstellung des drehbaren Teils 24 kann sowohl manuell als auch z.B. mit einem Wartungsgerät mechanisch durchgeführt werden.The adjustment of the rotatable part 24 can be done both manually and e.g. mechanically with a service unit.

In der Fadenspleißvorrichtung 20 der Fig. 8 ist in dem drehbaren Teil 24 lediglich ein Röhrchen 1 angeordnet. Die Drehachse 25 ist senkrecht zur Längsachse des Röhrchens 1 angeordnet und schneidet diese mittig. Wird das drehbare Teil um 180° gedreht, so ist es auf einfache Weise möglich, das Röhrchen 1 wechselseitig in Verwendung zu bringen und somit die Länge des aufzulösenden Fadenendes 11 zu variieren.In the thread splicing device 20 of FIG. 8, only one tube 1 is arranged in the rotatable part 24. The axis of rotation 25 is arranged perpendicular to the longitudinal axis of the tube 1 and cuts it in the middle. If the rotatable part is rotated through 180 °, it is possible in a simple manner to bring the tube 1 into mutual use and thus to vary the length of the thread end 11 to be released.

Der Düse 30 ist eine Steuervorrichtung 31 vorgeschaltet, die die Zuströmung des Fluids beeinflußt. Vorteilhafterweise wird die Zuströmung des Fluids aus einem Druckbehälter 32 in die Düse 30 nach jedem Auflösevorgang gestoppt und erst bei einem erneuten Auflösevorgang wieder zugelassen. Die Steuervorrichtung 31 begrenzt die Fluiddurchströmung pro Fadenendenvorbereitung auf eine Zeit von weniger als 30 ms. Die Fluiddurchströmung ist abhängig von der Stärke der Drehung des Fadenendes 11. Ist die Drehung des Fadenendes 11 kräftig und/oder ungleichförmig, d.h. sind starke Bauchbinden vorhanden oder ist die Drehung sowohl Z- als auch S-förmig, so ist eine längere Durchströmzeit zur Auflösung der Drehung nötig als im Falle einer lockeren Drehung. Wird das Fluid in Intervallen eingeströmt, d.h. wird der Fluidstrom immer wieder kurzzeitig unterbrochen oder abgeschwächt, so ergibt sich durch das stoßartige Auftreffen des Fluids auf das Fadenende 11 und die dadurch entstehenden Beschleunigungsspitzen, durch die das Fadenende 11 mit großer Kraft gegen die scharfkantige Struktur der Innenfläche 2 des Röhrchens 1 geschleudert wird, eine sehr gute Auflösung des Fadenendes 11 und seiner Drehung.A control device 31, which influences the inflow of the fluid, is connected upstream of the nozzle 30. Advantageously, the inflow of the fluid from a pressure vessel 32 into the nozzle 30 is stopped after each dissolution process and is only permitted again when the dissolution process is repeated. The control device 31 limits the fluid flow per thread end preparation to a time of less than 30 ms. The flow of fluid depends on the strength of the rotation of the thread end 11. If the rotation of the thread end 11 is strong and / or non-uniform, ie if there are strong abdominal bands or if the rotation is both Z- and S-shaped, then a longer flow-through time is a dissolution of rotation than in the case of a loose rotation. If the fluid flows in at intervals, that is, the fluid flow is interrupted or weakened again and again for a short time, the result is the sudden impact of the fluid on the thread end 11 and the resulting acceleration peaks, by which the thread end 11 with great force against the sharp-edged structure of the Inner surface 2 of the tube 1 is thrown, a very good resolution of the thread end 11 and its rotation.

In Fig. 9 ist ein Schnitt durch eine Fadenspleißvorrichtung 20 gezeigt, bei der in dem drehbaren Teil 24 zwei Röhrchen 1a und 1b angeordnet sind. Die Drehachse 25 des drehbaren Teils 24 ist parallel und mittig zu den Längsachsen der Röhrchen 1a und 1b angeordnet. Durch Drehung des drehbaren Teils 24 in Pfeilrichtung ist es somit möglich, unterschiedliche Röhrchen 1a oder 1b von dem Fluidstrom durchströmen zu lassen, indem es in den Bereich der aus der Düse 30 austretenden Fluidströmung gebracht wird. Mit dieser Ausbildung der Fadenspleißvorrichtung 20 ist es in vorteilhafter Weise möglich, unterschiedliche Fadenendenqualitäten mit den jeweils dafür am besten geeigneten Röhrchen 1a oder 1b von seiner Drehung zu lösen.FIG. 9 shows a section through a thread splicing device 20, in which two tubes 1a and 1b are arranged in the rotatable part 24. The axis of rotation 25 of the rotatable part 24 is arranged parallel and centrally to the longitudinal axes of the tubes 1a and 1b. By rotating the rotatable part 24 in the direction of the arrow, it is thus possible for the fluid flow to flow through different tubes 1a or 1b by bringing it into the region of the fluid flow emerging from the nozzle 30. With this design of the thread splicing device 20, it is advantageously possible to detach different thread end qualities from their rotation using the tubes 1a or 1b that are most suitable for this.

Bei der in Fig. 9 dargestellten Anordnung zur Drehachse 25 des drehbaren Teiles 24 ist es selbstverständlich auch möglich, für mehr als zwei Fadenqualitäten Röhrchen anzuordnen. Dies ist in der Art eines Revolvermagazins möglich, bei dem auf einem Kreis um die Drehachse 25 mehrere Röhrchen angeordnet sind. Das für die jeweils zu spleißende Fadenqualität günstigste Röhrchen wird dabei durch Drehung des drehbaren Teils 24 in die fluiddurchströmte Position ausgewählt.In the arrangement shown in FIG. 9 for the axis of rotation 25 of the rotatable part 24, it is of course also possible to arrange tubes for more than two thread qualities. This is possible in the manner of a revolver magazine, in which several tubes are arranged on a circle around the axis of rotation 25. The most favorable tube for the thread quality to be spliced in each case is selected by rotating the rotatable part 24 into the position through which fluid flows.

Die Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt. So ist es z.B. möglich, eine Anzahl Röhrchen auf einem Band oder eine Kette anzuordnen, und das geeignetste Röhrchen automatisch oder manuell an den Ort der Fluidströmung zu bewegen. Hierbei ist auch der Einsatz eines Mikroprozessors möglich, der programmgemäß das geeignetste Röhrchen, die geeignetste Fluideinströmzeitdauer und den Einströmverlauf je nach Fadenqualität auswählt.The invention is not restricted to the exemplary embodiments shown and described. So it is e.g. possible to arrange a number of tubes on a belt or chain, and to move the most suitable tube automatically or manually to the location of the fluid flow. It is also possible to use a microprocessor which, according to the program, selects the most suitable tube, the most suitable fluid inflow duration and the inflow profile depending on the thread quality.

Claims (24)

1. A yarn splicing device for the knot-free connection of yarns comprising a yarn splicing chamber and a tubule which is arranged at a distance from the yarn splicing chamber and is perfused by fluid, for receiving a yarn end in order to prepare it for the splicing process, characterised in that the tubule (1) has a roughly textured internal surface (3, 6) so that the yarn end (11) is substantially free from twist after making striking contact with the roughly textured internal surface (3, 6).
2. A yarn splicing device according to claim 1, characterised in that the internal surface (6) is roughened by knurling.
3. A yarn splicing device according to claim 1 or 2, characterised in that the internal surface (3) is roughened by irregularly arranged edges.
4. A yarn splicing device according to one of claims 1 to 3, characterised in that the rough internal surface (3, 6) is constructed with sharp edges.
5. A yarn splicing device according to one of claims 1 to 4, characterised in that the roughly textured internal surface (3, 6) of the tubule (1) is arranged axially and/or to a limited extent on a portion of the periphery.
6. A yarn splicing device according to one of claims 1 to 5, characterised in that the tubule (1) with its roughly textured internal surface (3, 6) has an internal diameter (D) which is a muliple of the yarn thickness (d).
7. A yarn splicing device according to claim 6, characterised in that the internal diameter (D) is at most half the length of the yarn end (11) penetrating into the tubule.
8. A yarn splicing device according to one of claims 1 to 7, characterised in that the roughly textured internal surface (3, 6) of the tubule (1) is adjustable relative to the yarn end (11).
9. A yarn splicing device according to one of claims 1 to 8, characterised in that the tubule (1) is arranged axially movably.
10. A yarn splicing device according to one of claims 1 to 9, characterised in that a yarn entry zone (E) having a diameter which increases toward the end of the tubule (1) is arranged at the end of the tubule (1) facing the yarn splicing chamber (22).
11. A yarn splicing device according to claim 10, characterised in that the surface of the yarn entry zone (E) is smooth in construction.
12. A yarn splicing device according to claim 10 or 11, characterised in that the yarn entry zone (E) is slotted in the direction of the longitudinal axis of the tubule (1).
13. A yarn splicing device according to one of claims 1 to 12, characterised in that the tubule (1) can be inserted alternately into the yarn splicing device (20).
14. A yarn splicing device according to one of claims 1 to 13, characterised in that a rotatable part (24) in which at least one tubule (1) is arranged is arranged on the yarn splicing device (20).
15. A yarn splicing device according to claim 14, characterised in that tubules (1a, 1b) with internal surfaces (2) having roughness of different thickness in each case are arranged in the rotatable part (24).
16. A yarn splicing device according to claim 14 or 15, characterised in that tubules (1a, 1b) with internal surfaces (2) having different regions of roughness in each case are arranged in the rotatable part (24).
17. A method of preparing yarn ends, in particular in a yarn splicing device according to one of claims 1 to 16, characterised in that the tubule is turbulently perfused by a fluid and the yarn end is struck, by the turbulent flow, against the textured internal surface of the tubule so that the yarn end is freed from twist.
18. A method according to claim 17, characterised in that the duration of fluid perfusion for each yarn end preparation process is limited in time.
19. A method according to claim 18, characterised in that the duration of fluid perfusion for each yarn end preparation process is limited to less than 30 ms.
20. A method according to one of claims 17 to 19, characterised in that the fluid for each yarn end preparation process is introduced at intervals.
21. A method according to one of claims 18 to 20, characterised in that, the thicker the yarn to be twisted and/or the tighter the twist of the yarn is, the longer the duration of fluid perfusion is selected.
22. A method according to one of claims 17 to 21, characterised in that, the thicker the yarn to be twisted and/or the tighter the twist of the yarn is, the greater the roughness of the internal surface of the tubule is selected.
23. A method according to one of claims 17 to 22, characterised in that, the thicker the yarn to be twisted and/or the tighter the twist of the yarn is, the higher the fluid pressure is selected.
24. A method according to one of claims 17 to 23, characterised in that the fluid is introduced at one end of the tubule and perfuses the entire tubule along its axis.
EP89114610A 1988-08-20 1989-08-08 Thread-splicing apparatus and method for preparing the thread ends Expired - Lifetime EP0356767B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3828319 1988-08-20
DE3828319A DE3828319A1 (en) 1988-08-20 1988-08-20 THREAD SPLICING DEVICE FOR KNOT-FREE CONNECTION OF THREADS AND METHOD FOR PREPARING THE THREAD END

Publications (2)

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EP0356767A1 EP0356767A1 (en) 1990-03-07
EP0356767B1 true EP0356767B1 (en) 1992-03-25

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EP89114610A Expired - Lifetime EP0356767B1 (en) 1988-08-20 1989-08-08 Thread-splicing apparatus and method for preparing the thread ends

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US (1) US5175983A (en)
EP (1) EP0356767B1 (en)
JP (1) JPH02163273A (en)
DE (2) DE3828319A1 (en)

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Also Published As

Publication number Publication date
JPH02163273A (en) 1990-06-22
DE3828319C2 (en) 1992-03-05
DE58901026D1 (en) 1992-04-30
DE3828319A1 (en) 1990-02-22
US5175983A (en) 1993-01-05
EP0356767A1 (en) 1990-03-07

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