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EP3798341B1 - Thread connecting device and warp knitting machine comprising a thread connecting device - Google Patents

Thread connecting device and warp knitting machine comprising a thread connecting device Download PDF

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Publication number
EP3798341B1
EP3798341B1 EP19199844.2A EP19199844A EP3798341B1 EP 3798341 B1 EP3798341 B1 EP 3798341B1 EP 19199844 A EP19199844 A EP 19199844A EP 3798341 B1 EP3798341 B1 EP 3798341B1
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EP
European Patent Office
Prior art keywords
thread
connecting device
pressure
textile
thermoplastic
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.)
Active
Application number
EP19199844.2A
Other languages
German (de)
French (fr)
Other versions
EP3798341A1 (en
Inventor
Matthias HOPPE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karl Mayer Stoll R&D GmbH
Original Assignee
Karl Mayer Stoll R&D GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Karl Mayer Stoll R&D GmbH filed Critical Karl Mayer Stoll R&D GmbH
Priority to EP19199844.2A priority Critical patent/EP3798341B1/en
Priority to CN201911372264.9A priority patent/CN112553771A/en
Priority to TW109123035A priority patent/TWI817023B/en
Priority to KR1020200101285A priority patent/KR102417782B1/en
Publication of EP3798341A1 publication Critical patent/EP3798341A1/en
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Publication of EP3798341B1 publication Critical patent/EP3798341B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/22—Devices for preparatory treatment of threads
    • D04B35/26—Devices for preparatory treatment of threads by heating
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • 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
    • B65H69/08—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by welding
    • B65H69/085—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by welding using ultrasonic means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D04B27/16—Warp beams; Bearings therefor
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B37/00—Auxiliary apparatus or devices for use with knitting machines
    • D04B37/06—Auxiliary apparatus or devices for use with knitting machines with warp knitting machines
    • 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
    • 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
    • B65H2701/38—Thread sheet, e.g. sheet of parallel yarns or wires

Definitions

  • the invention relates to a thread connecting device for connecting a first thermoplastic textile thread to a second thermoplastic textile thread, the thread connecting device having a pressure device for exerting a mechanical contact pressure on a thread pair formed by the first thermoplastic textile thread and the second thermoplastic textile thread, and having an energy input device for fusing the pair of threads while the pair of threads is placed in the printing device.
  • Devices for connecting two textile threads are known from the prior art.
  • the DE 195 04 573 C2 discloses a knotting device capable of knotting two threads together.
  • a knot that is created in this way has a relatively large diameter. The knot can therefore easily get caught on textile tools such as punch needles or the like when the thread is further processed by a textile machine. This can cause the textile thread to break, the knot to come loose or even damage the textile tools.
  • the JP H11 79559 A describes a method of connecting elastic yarns.
  • elastic yarns are connected to one another by being thermocompressed.
  • a special device is provided for this purpose, into which the elastic yarns are inserted.
  • the U.S. 3,055,786 A describes a device for connecting thermoplastic yarns. This can heat and heat a variety of yarns at the same time squeeze.
  • the U.S. 3,695,975 A also describes a joining device which joins yarns by means of heat. A heating element is guided along the yarns.
  • the DE 15 35 931 A relates to a device for connecting thermoplastic threads with a heating wire and clamping jaws. This has a housing that can be held in the hand.
  • the U.S. 3,184,363 A suggests using pressure and high-frequency vibrations to bond thermoplastic yarns together. In particular, it is proposed to excite the yarns using frequencies in the ultrasonic range.
  • the DE 200 02 925 U1 describes an automatic feed device for a warp knitting machine. In this case, threads are guided parallel to one another in thread holding grooves and connected to one another with the aid of an adhesive.
  • the invention is based on the object of providing a device for connecting textile threads, which connects textile threads to one another in such a way that the resulting connection point is particularly stable.
  • the object is achieved by providing a thread connecting device of the type described at the outset, in which the pressure device comprises two pressure elements, each of which has a pressing surface, with at least one of the pressure elements being coupled to a drive which drives the pressure element in a direction transverse to a longitudinal direction of the first thermoplastic fabric thread and the second thermoplastic fabric thread when the first thermoplastic fabric thread and the second thermoplastic fabric thread are pinched between the pressing surfaces.
  • Thermoplastic materials melt when heated.
  • the energy input device supplies energy to the textile threads so that they can heat up and fuse together.
  • the textile threads are pressed against one another and/or twisted together by the pressure device.
  • a connection point results with a diameter that at most slightly exceeds a diameter of the thermoplastic textile threads. Since the connection point has a small diameter and the diameter changes constantly in the area of the connection point, unlike in the case of a knot, the textile threads do not get caught on textile tools as easily.
  • the energy input device is preferably an ultrasonic generator.
  • the ultrasonic generator generates ultrasonic waves, which set the textile threads into high-frequency vibrations. This creates internal friction in the textile threads, which in turn heats up the textile threads.
  • the textile threads are heated up so much that they melt.
  • the melting process can be regulated particularly finely in this way, so that the ends of the thermoplastic textile threads to be connected melt evenly and a homogeneous and stable connection point results.
  • the melting time and thus the energy input can be precisely controlled. As soon as no more ultrasonic waves are introduced, the textile threads immediately stop heating up safely.
  • the energy input device can be formed by a heating element.
  • a heating element Such is suitable for generating thermal energy.
  • it can be an electrical heating element.
  • the heat energy generated by the heating element can be by convection, conduction and/or thermal radiation to the thermoplastic textile threads.
  • the energy input device can be coupled to the pressure device.
  • the ultrasonic generator can be coupled to the printing device, so that the ultrasonic generator can introduce ultrasonic waves into the textile threads via components of the printing device. If a heating element is used, then according to the invention this can be coupled to components of the printing device, so that the components of the printing device can conduct the thermal energy generated by the heating element to the textile threads by means of thermal conduction.
  • the pressure device comprises two pressure elements, each having a pressing surface, with at least one of the pressure elements being coupled to a drive which can displace the pressure element in a direction transverse to a longitudinal direction of the first thermoplastic textile thread and the second thermoplastic textile thread.
  • the textile threads are first clamped between the pressing surfaces.
  • a drive sets at least one of the printing elements in motion.
  • the textile threads are twisted together because the pressure elements move transversely to the longitudinal direction of the textile threads.
  • a particularly stable connection point results.
  • the thread connecting device can connect a large number of textile threads connect at the same time.
  • a knotting device on the other hand, can only sequentially process pairs of textile threads to be knotted.
  • the pressure elements are preferably flat or plate-shaped. Alternatively, however, it is also possible for the pressure elements to have a different shape. According to a possible embodiment of the invention, both pressure elements are movable and are set in motion by one or more drives. According to an alternative embodiment of the invention, a first pressure element is movable while a second pressure element is stationary. According to the invention, the second pressure element can form a section of a machine frame or another component of a textile machine.
  • the pressure elements can be displaced in a direction perpendicular to the pressing surfaces.
  • the pressing surfaces can thus be moved towards one another along a travel path, so that the textile threads are clamped between the pressure elements adjacent to one another.
  • the thread connecting device comprises a positioning device for positioning the first thermoplastic textile thread and the second thermoplastic textile thread in a region of the printing device.
  • the thread connecting device particularly preferably has a positioning device for positioning the first thermoplastic textile thread and the second thermoplastic textile thread in a region of the printing device in which the textile threads are connected to one another by the printing device.
  • the alignment device can the thermoplastic textile threads position according to the invention in the area of the printing device adjacent to each other, so that they can be connected to each other.
  • the positioning device is preferably set up to align the thermoplastic textile threads parallel to one another.
  • the positioning device can comprise a first pair of thread combs for carrying the first thermoplastic textile thread and a second pair of thread combs for carrying the second thermoplastic textile thread, each pair of thread combs having a first thread comb and a second thread comb, and wherein the first thread comb and the second thread comb are on opposite sides of the Printing device are arranged.
  • the thread combs are preferably arranged laterally to the printing device.
  • the first thread comb and the second thread comb of the first pair of thread combs carry the first textile thread.
  • the first thread comb and the second thread comb of the second pair of thread combs carry the second textile thread.
  • Each thread comb can optionally carry a large number of textile threads, so that a large number of pairs of threads can be connected to one another at the same time.
  • the thread combs it is possible for the thread combs to be arranged laterally to the pressure elements, but outside of a travel path of the pressure elements, and for the textile threads to stretch between the pressure elements.
  • the thread connecting device has at least one stretching device for stretching the first thermoplastic textile thread and/or the second thermoplastic textile thread.
  • the textile threads are stretched or elongated by them while they are arranged in the printing device.
  • In the area of the junction of the first and second thermoplastic textile threads are the first textile thread and the second textile thread next to each other.
  • the threads When the threads are welded together, they normally form a joint having a cross-sectional area approximately equal to a sum of cross-sectional areas of the first thermoplastic textile thread and the second thermoplastic textile thread.
  • the resulting cross-sectional area is usually less than a cross-sectional area that results when the textile threads are knotted, it is often desirable that reduce cross-sectional area even further.
  • the joint heated by the energy imparting device is viscous and can be stretched, reducing its cross-sectional area.
  • the stretching can also prevent the formation of shoulders in the area of the connection point, where the diameter of the connection point changes abruptly over a short distance. Such heels could encourage the connection point to get caught on knitting tools.
  • the stretching device can be formed by the previously described thread combs.
  • the thread combs can additionally be equipped with a fixing device for fixing the textile threads to the thread combs.
  • at least one of the thread combs can be displaceable relative to the printing device. By shifting a thread comb, it is possible to stretch the textile threads.
  • at least one of the thread combs can be displaced by a drive, so that the stretching can be automated.
  • the stretching device can be formed by a thread conveying device that pulls the thread in the longitudinal direction and thereby stretches the connection point of the warp threads.
  • the thread conveying device can be formed by one or more rotatable rollers, which can be set in rotation by a drive.
  • the thread conveying device can be a fabric take-off device of a textile machine.
  • the invention also relates to a warp knitting machine equipped with the thread joining device described above. After a warp beam change, warp threads that are still in the warp knitting machine are to be connected to warp threads that run off a newly changed warp beam.
  • the warp threads are connected by means of the thread connecting device.
  • the thread connecting device can be designed as a movable component with rollers or the like, which can be moved up to a machine frame of the warp knitting machine.
  • the thread connecting device can be permanently connected to the warp knitting machine.
  • the thread connecting device is pivotably attached to the machine frame of the warp knitting machine, so that it can be pivoted into a thread feed path that runs from the warp beam to the knitting point.
  • FIG. 1 shows a schematic representation of an embodiment of the thread connecting device 1 according to the invention with pressure elements 2 in a spaced apart state in a side view.
  • each Pressure element 2 has a contact surface 21 .
  • the pressure elements 2 form a pressure device 3 of the thread connecting device 1.
  • An energy input device 4, which is an ultrasonic generator, is arranged on one of the pressure elements 2.
  • Two thread comb pairs each have a first thread comb 5 and a second thread comb 6 .
  • the thread comb pairs carry first thermoplastic textile threads 7 and second thermoplastic textile threads 8.
  • a first thermoplastic textile thread 7 is to be welded to a second thermoplastic textile thread 8.
  • the second thermoplastic textile threads 8 are unwound from a warp beam 23 of a warp knitting machine and are intended connected to the first thermoplastic textile threads 7 already present in the warp knitting machine. This represents a possible application scenario for the thread connecting device 1.
  • FIG. 2 shows a schematic representation of the embodiment of the thread connecting device 1 with the pressure elements 2 in a spaced-apart state in a perspective view.
  • the ultrasonic generator is not shown here.
  • the first thermoplastic textile thread 7 and the second thermoplastic textile thread 8 are arranged between the pressure elements 2 .
  • the thread combs 5 and 6 position the textile threads 7 and 8 between the printing elements 2.
  • FIG 3 shows a schematic representation of the embodiment of the thread connecting device 1 with the pressure elements 2 in an approached state in a side view.
  • the pressure elements 2 have been moved towards one another and are now clamping the thermoplastic textile threads 7 and 8 .
  • the ultrasonic generator is activated, causing the textile threads 7 and 8 to heat up.
  • the pressure elements 2 are displaced relative to one another by a drive, which is not shown.
  • the textile threads 7 and 8 are twisted together.
  • the thermoplastic textile threads 7 and 8 connect to each other.
  • FIG. 12 shows a schematic representation of the embodiment of the thread connecting device 1 in an approximate state in a perspective view.
  • the thermoplastic textile threads 7 and 8 are fixed to the thread combs 5 and 6.
  • the first thread comb 5 and the second thread comb 6 are shifted during the connection process, so that a distance between them increased.
  • a connection point of the first textile thread 7 with the second textile thread 8 is stretched.
  • a cross-sectional area of the connection point created between the textile threads 7 and 8 is thus reduced.
  • thermoplastic textile threads have connected to one another, as a result of which a connection point 10 has arisen, the cross section of which can be seen in the present case.
  • the joint 10 must then be stretched to reduce its cross-sectional area.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Knitting Machines (AREA)

Description

Die Erfindung betrifft eine Fadenverbindungsvorrichtung zur Verbindung eines ersten thermoplastischen Textilfadens mit einem zweiten thermoplastischen Textilfaden, wobei die Fadenverbindungsvorrichtung eine Druckvorrichtung aufweist zur Ausübung eines mechanischen Anpressdrucks auf ein Fadenpaar, das durch den ersten thermoplastischen Textilfaden und den zweiten thermoplastischen Textilfaden gebildet wird, und eine Energieeintragsvorrichtung aufweist zum Verschweißen des Fadenpaars, während das Fadenpaar in der Druckvorrichtung angeordnet ist. Aus dem Stand der Technik sind Vorrichtungen zum Verbinden zweier Textilfäden bekannt. Die DE 195 04 573 C2 offenbart eine Knotvorrichtung, die zwei Fäden miteinander verknoten kann. Ein dabei entstehender Knoten weist jedoch einen relativ hohen Durchmesser auf. Der Knoten kann deshalb leicht an Textilwerkzeugen wie Lochnadeln oder dergleichen hängenbleiben, wenn der Faden von einer Textilmaschine weiterverarbeitet wird. Dies kann zu einem Abriss des Textilfadens, zu einer Lösung des Knotens oder sogar zu einer Beschädigung der Textilwerkzeuge führen.The invention relates to a thread connecting device for connecting a first thermoplastic textile thread to a second thermoplastic textile thread, the thread connecting device having a pressure device for exerting a mechanical contact pressure on a thread pair formed by the first thermoplastic textile thread and the second thermoplastic textile thread, and having an energy input device for fusing the pair of threads while the pair of threads is placed in the printing device. Devices for connecting two textile threads are known from the prior art. the DE 195 04 573 C2 discloses a knotting device capable of knotting two threads together. However, a knot that is created in this way has a relatively large diameter. The knot can therefore easily get caught on textile tools such as punch needles or the like when the thread is further processed by a textile machine. This can cause the textile thread to break, the knot to come loose or even damage the textile tools.

Die JP H11 79559 A beschreibt ein Verfahren zur Verbindung von Elastikgarnen. Dabei werden Elastikgarne miteinander verbunden, indem sie thermokomprimiert werden. Hierzu ist eine spezielle Vorrichtung vorgesehen, in welche die Elastikgarne eingelegt werden. Die US 3 055 786 A beschreibt eine Vorrichtung zur Verbindung von thermoplastischen Garnen. Diese kann eine Vielzahl von Garnen gleichzeitig erhitzen und zusammendrücken. Die US 3 695 975 A beschreibt auch eine Verbindungsvorrichtung, welche Garne mittels Hitze verbindet. Dabei wird ein Heizelement an den Garnen entlanggeführt.the JP H11 79559 A describes a method of connecting elastic yarns. In this case, elastic yarns are connected to one another by being thermocompressed. A special device is provided for this purpose, into which the elastic yarns are inserted. the U.S. 3,055,786 A describes a device for connecting thermoplastic yarns. This can heat and heat a variety of yarns at the same time squeeze. the U.S. 3,695,975 A also describes a joining device which joins yarns by means of heat. A heating element is guided along the yarns.

Die DE 15 35 931 A betrifft eine Vorrichtung zur Verbindung thermoplastischer Kunststofffäden mit einem Heizdraht und Klemmbacken. Diese besitzt ein Gehäuse, das in der Hand gehalten werden kann. Die US 3 184 363 A schlägt hingegen vor, thermoplastische Garne mittels Druck und hochfrequenter Vibrationen miteinander zu verbinden. Insbesondere wird vorgeschlagen, die Garne mittels Frequenzen im Ultraschallbereich anzuregen. Die DE 200 02 925 U1 beschreibt eine automatische Einzugsvorrichtung für eine Kettenwirkmaschine. Hierbei werden Fäden zueinander parallel in Fädenhalterillen geführt und mit Hilfe eines Klebstoffs miteinander verbunden.the DE 15 35 931 A relates to a device for connecting thermoplastic threads with a heating wire and clamping jaws. This has a housing that can be held in the hand. the U.S. 3,184,363 A suggests using pressure and high-frequency vibrations to bond thermoplastic yarns together. In particular, it is proposed to excite the yarns using frequencies in the ultrasonic range. the DE 200 02 925 U1 describes an automatic feed device for a warp knitting machine. In this case, threads are guided parallel to one another in thread holding grooves and connected to one another with the aid of an adhesive.

Der Erfindung liegt die Aufgabe zu Grunde, eine Vorrichtung zum Verbinden von Textilfäden bereitzustellen, die Textilfäden so miteinander verbindet, dass eine dabei entstehende Verbindungsstelle besonders stabil ist.The invention is based on the object of providing a device for connecting textile threads, which connects textile threads to one another in such a way that the resulting connection point is particularly stable.

Die Aufgabe wird gelöst, indem eine Fadenverbindungsvorrichtung der eingangs beschriebenen Gattung bereitgestellt wird, bei welcher die Druckvorrichtung zwei Druckelemente umfasst, die jeweils eine Anpressoberfläche aufweisen, wobei mindestens eines der Druckelemente mit einem Antrieb gekoppelt ist, der das Druckelement in einer Richtung quer zu einer Längsrichtung des ersten thermoplastischen Textilfadens und des zweiten thermoplastischen Textilfadens verlagern kann, wenn der erste thermoplastische Textilfäden und der zweite thermoplastische Textilfäden zwischen den Anpressoberflächen eingeklemmt sind.The object is achieved by providing a thread connecting device of the type described at the outset, in which the pressure device comprises two pressure elements, each of which has a pressing surface, with at least one of the pressure elements being coupled to a drive which drives the pressure element in a direction transverse to a longitudinal direction of the first thermoplastic fabric thread and the second thermoplastic fabric thread when the first thermoplastic fabric thread and the second thermoplastic fabric thread are pinched between the pressing surfaces.

Thermoplastische Materialien schmelzen, wenn diese erwärmt werden. Die Energieeintragsvorrichtung führt den Textilfäden Energie zu, sodass diese sich erwärmen und miteinander verschmelzen können. Gleichzeitig werden die Textilfäden durch die Druckvorrichtung aneinandergedrückt und/oder miteinander verdrillt. Es ergibt sich eine Verbindungsstelle mit einem Durchmesser, der einen Durchmesser der thermoplastischen Textilfäden allenfalls geringfügig überschreitet. Da die Verbindungsstelle einen geringen Durchmesser aufweist und der Durchmesser sich im Bereich der Verbindungsstelle anders als bei einem Knoten stetig ändert, bleiben die Textilfäden nicht so leicht an Textilwerkzeugen hängen.Thermoplastic materials melt when heated. The energy input device supplies energy to the textile threads so that they can heat up and fuse together. At the same time, the textile threads are pressed against one another and/or twisted together by the pressure device. A connection point results with a diameter that at most slightly exceeds a diameter of the thermoplastic textile threads. Since the connection point has a small diameter and the diameter changes constantly in the area of the connection point, unlike in the case of a knot, the textile threads do not get caught on textile tools as easily.

Bei der Energieeintragsvorrichtung handelt es sich bevorzugt um einen Ultraschallgenerator. Der Ultraschallgenerator erzeugt Ultraschallwellen, welche die Textilfäden in hochfrequente Schwingungen versetzen. Dadurch entsteht in den Textilfäden eine innere Reibung, die wiederum die Textilfäden aufheizt. Die Textilfäden werden so stark aufgeheizt, dass diese schmelzen. Wie sich herausgestellt hat, lässt sich der Schmelzvorgang auf diese Weise besonders fein regeln, sodass zu verbindende Enden der thermoplastischen Textilfäden gleichmäßig aufschmelzen und sich eine homogene und stabile Verbindungsstelle ergibt. Die Schmelzzeit und damit der Energieeintrag lässt sich genau regeln. Sobald keine Ultraschallwellen mehr eingeleitet werden, hören die Textilfäden unmittelbar auf, sicher weiter aufzuheizen.The energy input device is preferably an ultrasonic generator. The ultrasonic generator generates ultrasonic waves, which set the textile threads into high-frequency vibrations. This creates internal friction in the textile threads, which in turn heats up the textile threads. The textile threads are heated up so much that they melt. As has been found, the melting process can be regulated particularly finely in this way, so that the ends of the thermoplastic textile threads to be connected melt evenly and a homogeneous and stable connection point results. The melting time and thus the energy input can be precisely controlled. As soon as no more ultrasonic waves are introduced, the textile threads immediately stop heating up safely.

Die Energieeintragsvorrichtung kann alternativ durch ein Heizelement gebildet werden. Ein solches ist zur Erzeugung von Wärmeenergie geeignet. Es kann sich erfindungsgemäß um ein elektrisches Heizelement handeln. Die durch das Heizelement erzeugte Wärmeenergie kann durch Konvektion, Wärmeleitung und/oder Wärmestrahlung zu den thermoplastischen Textilfäden geführt werden.Alternatively, the energy input device can be formed by a heating element. Such is suitable for generating thermal energy. According to the invention, it can be an electrical heating element. The heat energy generated by the heating element can be by convection, conduction and/or thermal radiation to the thermoplastic textile threads.

Es ist erfindungsgemäß möglich, dass die Energieeintragsvorrichtung mit der Druckvorrichtung gekoppelt ist. Erfindungsgemäß kann der Ultraschallgenerator mit der Druckvorrichtung gekoppelt sein, sodass der Ultraschallgenerator Ultraschallwellen über Bauteile der Druckvorrichtung in die Textilfäden einleiten kann. Wird ein Heizelement eingesetzt, dann kann dieses erfindungsgemäß mit Bauteilen der Druckvorrichtung gekoppelt sein, sodass die Bauteile der Druckvorrichtung die von dem Heizelement erzeugte Wärmeenergie mittels Wärmeleitung zu den Textilfäden führen können.According to the invention, it is possible for the energy input device to be coupled to the pressure device. According to the invention, the ultrasonic generator can be coupled to the printing device, so that the ultrasonic generator can introduce ultrasonic waves into the textile threads via components of the printing device. If a heating element is used, then according to the invention this can be coupled to components of the printing device, so that the components of the printing device can conduct the thermal energy generated by the heating element to the textile threads by means of thermal conduction.

Es ist vorgesehen, dass die Druckvorrichtung zwei Druckelemente umfasst, die jeweils eine Anpressoberfläche aufweisen, wobei mindestens eines der Druckelemente mit einem Antrieb gekoppelt ist, der das Druckelement in einer Richtung quer zu einer Längsrichtung des ersten thermoplastischen Textilfadens und des zweiten thermoplastischen Textilfadens verlagern kann. Beim Betrieb der Fadenverbindungsvorrichtung werden die Textilfäden zunächst zwischen den Anpressoberflächen eingeklemmt. Dann versetzt ein Antrieb mindestens eines der Druckelemente in Bewegung. Die Textilfäden werden dabei miteinander verdrillt, denn die Druckelemente bewegen sich quer zu der Längsrichtung der Textilfäden. Es ergibt sich eine besonders stabile Verbindungsstelle. Mit Hilfe der Druckelemente kann die Fadenverbindungsvorrichtung eine Vielzahl von Textilfäden gleichzeitig miteinander verbinden. Eine Knoteinrichtung kann hingegen zu verknotende Paare von Textilfäden nur sequenziell verarbeiten.It is provided that the pressure device comprises two pressure elements, each having a pressing surface, with at least one of the pressure elements being coupled to a drive which can displace the pressure element in a direction transverse to a longitudinal direction of the first thermoplastic textile thread and the second thermoplastic textile thread. During operation of the thread connecting device, the textile threads are first clamped between the pressing surfaces. A drive then sets at least one of the printing elements in motion. The textile threads are twisted together because the pressure elements move transversely to the longitudinal direction of the textile threads. A particularly stable connection point results. With the help of the pressure elements, the thread connecting device can connect a large number of textile threads connect at the same time. A knotting device, on the other hand, can only sequentially process pairs of textile threads to be knotted.

Die Druckelemente sind bevorzugt flächig beziehungsweise plattenförmig ausgebildet. Es ist alternativ jedoch auch möglich, dass die Druckelemente eine abweichende Form aufweisen. Gemäß einer möglichen Ausführungsform der Erfindung sind beide Druckelemente beweglich und werden durch einen oder mehrere Antriebe in Bewegung versetzt. Gemäß einer alternativen Ausführungsform der Erfindung ist ein erstes Druckelement beweglich, während ein zweites Druckelement stationär ist. Erfindungsgemäß kann das zweite Druckelement einen Abschnitt eines Maschinenrahmens oder eines sonstigen Bauteils einer Textilmaschine bilden.The pressure elements are preferably flat or plate-shaped. Alternatively, however, it is also possible for the pressure elements to have a different shape. According to a possible embodiment of the invention, both pressure elements are movable and are set in motion by one or more drives. According to an alternative embodiment of the invention, a first pressure element is movable while a second pressure element is stationary. According to the invention, the second pressure element can form a section of a machine frame or another component of a textile machine.

Es ist bevorzugt, wenn die Druckelemente in einer Richtung senkrecht zu den Anpressoberflächen verlagerbar sind. Die Anpressoberflächen können somit entlang eines Verfahrwegs aufeinander zu bewegt werden, sodass die Textilfäden zwischen den Druckelementen zueinander benachbart eingeklemmt werden.It is preferred if the pressure elements can be displaced in a direction perpendicular to the pressing surfaces. The pressing surfaces can thus be moved towards one another along a travel path, so that the textile threads are clamped between the pressure elements adjacent to one another.

Vorzugsweise weist die Fadenverbindungsvorrichtung eine Positionierungsvorrichtung zur Positionierung des ersten thermoplastischen Textilfadens und des zweiten thermoplastischen Textilfadens in einem Bereich der Druckvorrichtung auf. Besonders bevorzugt weist die Fadenverbindungsvorrichtung eine Positionierungsvorrichtung zur Positionierung des ersten thermoplastischen Textilfadens und des zweiten thermoplastischen Textilfadens in einem Bereich der Druckvorrichtung auf, in dem die Textilfäden durch die Druckvorrichtung miteinander verbunden werden. Die Ausrichtungsvorrichtung kann die thermoplastischen Textilfäden erfindungsgemäß in dem Bereich der Druckvorrichtung benachbart zueinander positionieren, sodass diese miteinander verbunden werden können. Die Positionierungsvorrichtung ist bevorzugt dazu eingerichtet, die thermoplastischen Textilfäden parallel zueinander auszurichten.Preferably, the thread connecting device comprises a positioning device for positioning the first thermoplastic textile thread and the second thermoplastic textile thread in a region of the printing device. The thread connecting device particularly preferably has a positioning device for positioning the first thermoplastic textile thread and the second thermoplastic textile thread in a region of the printing device in which the textile threads are connected to one another by the printing device. The alignment device can the thermoplastic textile threads position according to the invention in the area of the printing device adjacent to each other, so that they can be connected to each other. The positioning device is preferably set up to align the thermoplastic textile threads parallel to one another.

Die Positionierungsvorrichtung kann erfindungsgemäß ein erstes Fadenkammpaar zum Tragen des ersten thermoplastischen Textilfadens und ein zweites Fadenkammpaar zum Tragen des zweiten thermoplastischen Textilfadens umfassen, wobei jedes Fadenkammpaar einen ersten Fadenkamm und einen zweiten Fadenkamm aufweist, und wobei der erste Fadenkamm und der zweite Fadenkamm auf entgegengesetzten Seiten der Druckvorrichtung angeordnet sind. Die Fadenkämme sind bevorzugt seitlich zu der Druckvorrichtung angeordnet. Der erste Fadenkamm und der zweite Fadenkamm des ersten Fadenkammpaars tragen den ersten Textilfaden. Der erste Fadenkamm und der zweite Fadenkamm des zweiten Fadenkammpaars tragen den zweiten Textilfaden. Jeder Fadenkamm kann gegebenenfalls eine Vielzahl Textilfäden tragen, sodass eine Vielzahl von Fadenpaaren gleichzeitig miteinander verbunden werden können. Es ist erfindungsgemäß möglich, dass die Fadenkämme seitlich zu den Druckelementen, jedoch außerhalb eines Verfahrwegs der Druckelemente, angeordnet sind, und die Textilfäden zwischen den Druckelementen aufspannen.According to the invention, the positioning device can comprise a first pair of thread combs for carrying the first thermoplastic textile thread and a second pair of thread combs for carrying the second thermoplastic textile thread, each pair of thread combs having a first thread comb and a second thread comb, and wherein the first thread comb and the second thread comb are on opposite sides of the Printing device are arranged. The thread combs are preferably arranged laterally to the printing device. The first thread comb and the second thread comb of the first pair of thread combs carry the first textile thread. The first thread comb and the second thread comb of the second pair of thread combs carry the second textile thread. Each thread comb can optionally carry a large number of textile threads, so that a large number of pairs of threads can be connected to one another at the same time. According to the invention, it is possible for the thread combs to be arranged laterally to the pressure elements, but outside of a travel path of the pressure elements, and for the textile threads to stretch between the pressure elements.

Es ist bevorzugt, wenn die Fadenverbindungsvorrichtung mindestens eine Verstreckungseinrichtung zur Verstreckung des ersten thermoplastischen Textilfadens und/oder des zweiten thermoplastischen Textilfadens aufweist. Die Textilfäden werden durch diese verstreckt beziehungsweise in die Länge gezogen, während sie in der Druckvorrichtung angeordnet sind. Im Bereich der Verbindungsstelle des ersten und des zweiten thermoplastischen Textilfäden liegen der erste Textilfaden und der zweite Textilfaden nebeneinander. Wenn die Fäden miteinander verschweißt werden, bilden sie normalerweise eine Verbindungsstelle, die einen Querschnittsfläche aufweist, die ungefähr einer Summe von Querschnittsflächen des ersten thermoplastischen Textilfadens und des zweiten thermoplastischen Textilfadens entspricht. Obwohl die sich ergebende Querschnittsfläche in der Regel geringer ist als eine Querschnittsfläche, die sich bei einer Verknotung der Textilfäden ergibt, ist es häufig wünschenswert, die Querschnittsfläche noch weiter zu reduzieren. Dies kann durch eine Verstreckung der Textilfäden in Längsrichtung erreicht werden, während die Textilfäden miteinander verschmolzen werden. Die durch die Energieeinbringungsvorrichtung erwärmte Verbindungsstelle ist viskos und kann in die Länge gezogen werden, sodass sich ihre Querschnittsfläche vermindert. Durch das Verstrecken kann ferner die Bildung von Absätzen im Bereich der Verbindungsstelle verhindert werden, bei denen sich der Durchmesser der Verbindungsstelle über einen kurzen Weg sprunghaft ändert. Solche Absätze könnten es begünstigen, dass die Verbindungsstelle an Wirkwerkzeugen hängenbleibt.It is preferred if the thread connecting device has at least one stretching device for stretching the first thermoplastic textile thread and/or the second thermoplastic textile thread. The textile threads are stretched or elongated by them while they are arranged in the printing device. In the area of the junction of the first and second thermoplastic textile threads are the first textile thread and the second textile thread next to each other. When the threads are welded together, they normally form a joint having a cross-sectional area approximately equal to a sum of cross-sectional areas of the first thermoplastic textile thread and the second thermoplastic textile thread. Although the resulting cross-sectional area is usually less than a cross-sectional area that results when the textile threads are knotted, it is often desirable that reduce cross-sectional area even further. This can be achieved by longitudinal stretching of the textile threads while the textile threads are being fused together. The joint heated by the energy imparting device is viscous and can be stretched, reducing its cross-sectional area. The stretching can also prevent the formation of shoulders in the area of the connection point, where the diameter of the connection point changes abruptly over a short distance. Such heels could encourage the connection point to get caught on knitting tools.

Die Verstreckungseinrichtung kann erfindungsgemäß durch die vorhergehend beschriebenen Fadenkämme gebildet werden. Die Fadenkämme können zu diesem Zweck ergänzend mit einer Fixiereinrichtung zur Fixierung der Textilfäden an den Fadenkämmen ausgestattet sein. Erfindungsgemäß kann mindestens einer der Fadenkämme relativ zu der Druckvorrichtung verlagerbar sein. Durch eine Verlagerung eines Fadenkamms gelingt es, die Textilfäden zu verstrecken. Gemäß einer möglichen Ausführungsform der Erfindung ist mindestens einer der Fadenkämme durch einen Antrieb verlagerbar, sodass die Verstreckung automatisiert erfolgen kann.According to the invention, the stretching device can be formed by the previously described thread combs. For this purpose, the thread combs can additionally be equipped with a fixing device for fixing the textile threads to the thread combs. According to the invention, at least one of the thread combs can be displaceable relative to the printing device. By shifting a thread comb, it is possible to stretch the textile threads. According to a possible embodiment of the invention, at least one of the thread combs can be displaced by a drive, so that the stretching can be automated.

Alternativ kann die Verstreckungsvorrichtung durch eine Fadenförderungseinrichtung gebildet werden, die den Faden in Längsrichtung zieht und dadurch die Verbindungsstelle der Kettfäden verstreckt. Die Fadenförderungseinrichtung kann erfindungsgemäß durch eine oder mehrere drehbare Rollen gebildet werden, die durch einen Antrieb in Rotation versetzt werden können. Gemäß einer besonderen Ausführungsform der Erfindung kann es sich bei der Fadenförderungseinrichtung um eine Warenabzugseinrichtung einer Textilmaschine handeln.Alternatively, the stretching device can be formed by a thread conveying device that pulls the thread in the longitudinal direction and thereby stretches the connection point of the warp threads. According to the invention, the thread conveying device can be formed by one or more rotatable rollers, which can be set in rotation by a drive. According to a special embodiment of the invention, the thread conveying device can be a fabric take-off device of a textile machine.

Es ist erfindungsgemäß möglich, dass die Fadenverbindungsvorrichtung eine Fadenschneidvorrichtung zum Abschneiden von Fadenüberstand aufweist. Beim Verschweißen des ersten thermoplastischen Textilfadens mit dem zweiten thermoplastischen Textilfaden kann ein Überstandsbereich entstehen, in dem die Textilfäden nebeneinander liegen, aber nicht verschweißt sind. Der dadurch gebildete Fadenüberstand kann mittels der Fadenschneidvorrichtung abgeschnitten werden. Bei der Fadenschneidvorrichtung kann es sich erfindungsgemäß um ein automatisiertes Scherwerkzeug oder dergleichen handeln, das zur Abtrennung überstehender Fadenenden geeignet ist.According to the invention, it is possible for the thread connecting device to have a thread cutting device for cutting off excess thread. When the first thermoplastic textile thread is welded to the second thermoplastic textile thread, a protruding area can arise in which the textile threads lie next to one another but are not welded. The excess thread thus formed can be cut off by means of the thread cutting device. According to the invention, the thread cutting device can be an automated shearing tool or the like, which is suitable for cutting off protruding thread ends.

Die Erfindung betrifft ferner eine Kettenwirkmaschine, die mit der vorangehend beschriebenen Fadenverbindungsvorrichtung ausgestattet ist. Nach einem Kettbaumwechsel sollen noch in der Kettenwirkmaschine befindliche Kettfäden mit Kettfäden, die von einem neu eingewechselten Kettbaum ablaufen, verbunden werden. Die Verbindung der Kettfäden erfolgt mittels der Fadenverbindungsvorrichtung. Die Fadenverbindungsvorrichtung kann als eine verfahrbare Komponente mit Rollen oder dergleichen ausgeführt sein, die an einen Maschinenrahmen der Kettenwirkmaschine herangefahren werden kann. Die Fadenverbindungsvorrichtung kann alternativ fest mit der Kettenwirkmaschine verbunden sein. So ist es gemäß einer Ausführungsform der Erfindung möglich, dass die Fadenverbindungsvorrichtung an einem Maschinenrahmen der Kettenwirkmaschine befestigt ist. Es ist erfindungsgemäß ferner möglich, dass die Fadenverbindungsvorrichtung verschwenkbar an dem Maschinenrahmen der Kettenwirkmaschine angebracht ist, so dass sie in einen Fadenzuführungspfad, der von dem Kettbaum zu der Wirkstelle verläuft, verschwenkt werden kann.The invention also relates to a warp knitting machine equipped with the thread joining device described above. After a warp beam change, warp threads that are still in the warp knitting machine are to be connected to warp threads that run off a newly changed warp beam. The warp threads are connected by means of the thread connecting device. The thread connecting device can be designed as a movable component with rollers or the like, which can be moved up to a machine frame of the warp knitting machine. Alternatively, the thread connecting device can be permanently connected to the warp knitting machine. Thus, according to one embodiment of the invention, it is possible for the thread connecting device to be attached to a machine frame of the warp knitting machine. It is also possible according to the invention that the thread connecting device is pivotably attached to the machine frame of the warp knitting machine, so that it can be pivoted into a thread feed path that runs from the warp beam to the knitting point.

Die Zeichnungen geben eine bevorzugte Ausführungsform der Erfindung wieder. Dabei zeigt:

  • Fig. 1 eine schematische Darstellung einer Ausführungsform der erfindungsgemäßen Fadenverbindungsvorrichtung mit Druckelementen in beabstandetem Zustand in einer Seitenansicht,
  • Fig. 2 eine schematische Darstellung der Ausführungsform der Fadenverbindungsvorrichtung mit den Druckelementen in beabstandetem Zustand in einer perspektivischen Ansicht,
  • Fig. 3 eine schematische Darstellung der Ausführungsform der Fadenverbindungsvorrichtung mit den Druckelementen in angenähertem Zustand in einer Seitenansicht,
  • Fig. 4 eine schematische Darstellung der Ausführungsform der Fadenverbindungsvorrichtung mit den Druckelementen in angenähertem Zustand in einer perspektivischen Ansicht,
  • Fig. 5 eine schematische Darstellung der Druckelemente der Ausführungsform der Fadenverbindungsvorrichtung beim Beginn eines Verbindungsvorgangs in einer Schnittansicht und
  • Fig. 6 eine schematische Darstellung der Druckelemente der Ausführungsform der Fadenverbindungsvorrichtung während des Verbindungsvorgangs in einer Schnittansicht.
The drawings show a preferred embodiment of the invention. It shows:
  • 1 a schematic representation of an embodiment of the thread connecting device according to the invention with pressure elements in a spaced apart state in a side view,
  • 2 a schematic representation of the embodiment of the thread connecting device with the pressure elements in a spaced-apart state in a perspective view,
  • 3 a schematic representation of the embodiment of the thread connecting device with the pressure elements in an approached state in a side view,
  • 4 a schematic representation of the embodiment of the thread connecting device with the pressure elements in an approached state in a perspective view,
  • figure 5 a schematic representation of the pressure elements of the embodiment of the thread connecting device at the beginning of a connecting process in a sectional view and
  • 6 a schematic representation of the pressure elements of the embodiment of the thread connecting device during the connecting process in a sectional view.

Fig. 1 zeigt eine schematische Darstellung einer Ausführungsform der erfindungsgemäßen Fadenverbindungsvorrichtung 1 mit Druckelementen 2 in beabstandetem Zustand in einer Seitenansicht. Jedes Druckelement 2 weist eine Anpressoberfläche 21 auf. Die Druckelemente 2 bilden eine Druckvorrichtung 3 der Fadenverbindungsvorrichtung 1. An einem der Druckelemente 2 ist eine Energieeintragsvorrichtung 4 angeordnet, bei der es sich um einen Ultraschallgenerator handelt. Zwei Fadenkammpaare weisen jeweils einen ersten Fadenkamm 5 und einen zweiten Fadenkamm 6 auf. Die Fadenkammpaare tragen erste thermoplastische Textilfäden 7 beziehungsweise zweite thermoplastische Textilfäden 8. Es soll jeweils ein erster thermoplastischer Textilfaden 7 mit einem zweiten thermoplastischen Textilfaden 8 verschweißt werden. Die zweiten thermoplastischen Textilfäden 8 werden von einem Kettbaum 23 einer Kettenwirkmaschine abgewickelt und sollen mit den bereits in der Kettenwirkmaschine vorhandenen ersten thermoplastischen Textilfäden 7 verbunden werden. Dies stellt ein mögliches Anwendungsszenario für die Fadenverbindungsvorrichtung 1 dar. 1 shows a schematic representation of an embodiment of the thread connecting device 1 according to the invention with pressure elements 2 in a spaced apart state in a side view. each Pressure element 2 has a contact surface 21 . The pressure elements 2 form a pressure device 3 of the thread connecting device 1. An energy input device 4, which is an ultrasonic generator, is arranged on one of the pressure elements 2. Two thread comb pairs each have a first thread comb 5 and a second thread comb 6 . The thread comb pairs carry first thermoplastic textile threads 7 and second thermoplastic textile threads 8. In each case, a first thermoplastic textile thread 7 is to be welded to a second thermoplastic textile thread 8. The second thermoplastic textile threads 8 are unwound from a warp beam 23 of a warp knitting machine and are intended connected to the first thermoplastic textile threads 7 already present in the warp knitting machine. This represents a possible application scenario for the thread connecting device 1.

Fig. 2 zeigt eine schematische Darstellung der Ausführungsform der Fadenverbindungsvorrichtung 1 mit den Druckelementen 2 in beabstandetem Zustand in einer perspektivischen Ansicht. Der Ultraschallgenerator ist vorliegend nicht gezeigt. Der erste thermoplastische Textilfaden 7 und der zweite thermoplastische 8 Textilfaden sind zwischen den Druckelementen 2 angeordnet. Die Fadenkämme 5 und 6 positionieren die Textilfäden 7 und 8 zwischen den Druckelementen 2. 2 shows a schematic representation of the embodiment of the thread connecting device 1 with the pressure elements 2 in a spaced-apart state in a perspective view. The ultrasonic generator is not shown here. The first thermoplastic textile thread 7 and the second thermoplastic textile thread 8 are arranged between the pressure elements 2 . The thread combs 5 and 6 position the textile threads 7 and 8 between the printing elements 2.

Fig. 3 zeigt eine schematische Darstellung der Ausführungsform der Fadenverbindungsvorrichtung 1 mit den Druckelementen 2 in angenähertem Zustand in einer Seitenansicht. Die Druckelemente 2 sind aufeinander zubewegt worden und klemmen nun die thermoplastischen Textilfäden 7 und 8 ein. Der Ultraschallgenerator wird aktiviert, wodurch sich die Textilfäden 7 und 8 erwärmen. Gleichzeitig werden die Druckelemente 2 durch einen nicht dargestellten Antrieb relativ zueinander verlagert. Dadurch werden die Textilfäden 7 und 8 miteinander verdrillt. Unter der gleichzeitigen Erwärmung verbinden sich die thermoplastischen Textilfäden 7 und 8 miteinander. 3 shows a schematic representation of the embodiment of the thread connecting device 1 with the pressure elements 2 in an approached state in a side view. The pressure elements 2 have been moved towards one another and are now clamping the thermoplastic textile threads 7 and 8 . The ultrasonic generator is activated, causing the textile threads 7 and 8 to heat up. At the same time, the pressure elements 2 are displaced relative to one another by a drive, which is not shown. As a result, the textile threads 7 and 8 are twisted together. With the simultaneous heating, the thermoplastic textile threads 7 and 8 connect to each other.

Fig. 4 zeigt eine schematische Darstellung der Ausführungsform der Fadenverbindungsvorrichtung 1 in angenähertem Zustand in einer perspektivischen Ansicht. Die thermoplastischen Textilfäden 7 und 8 sind an den Fadenkämmen 5 und 6 fixiert. Der erste Fadenkamm 5 und der zweite Fadenkamm 6 werden während des Verbindungsvorgangs verlagert, sodass sich ein Abstand zwischen ihnen vergrößert. Dadurch wird eine Verbindungsstelle des ersten Textilfadens 7 mit dem zweiten Textilfaden 8 verstreckt. Eine Querschnittsfläche der zwischen den Textilfäden 7 und 8 entstehenden Verbindungsstelle wird somit reduziert. 4 FIG. 12 shows a schematic representation of the embodiment of the thread connecting device 1 in an approximate state in a perspective view. The thermoplastic textile threads 7 and 8 are fixed to the thread combs 5 and 6. The first thread comb 5 and the second thread comb 6 are shifted during the connection process, so that a distance between them increased. As a result, a connection point of the first textile thread 7 with the second textile thread 8 is stretched. A cross-sectional area of the connection point created between the textile threads 7 and 8 is thus reduced.

Fig. 5 eine schematische Darstellung der Druckelemente 2 der Ausführungsform der Fadenverbindungsvorrichtung beim Beginn eines Verbindungsvorgangs in einer Schnittansicht. Es liegt jeweils ein erster thermoplastischer Textilfaden 7 neben einem zweiten thermoplastischen Textilfaden 8. Die Druckelemente 2 werden nun entlang einer Versatzachse 9 relativ zueinander verlagert. Die Versatzachse 9 ist quer zu einer Längsrichtung des ersten thermoplastischen Textilfadens 7 und des zweiten thermoplastischen Textilfadens 8 ausgerichtet. figure 5 a schematic representation of the pressure elements 2 of the embodiment of the thread connecting device at the beginning of a connecting process in a sectional view. In each case, a first thermoplastic textile thread 7 lies next to a second thermoplastic textile thread 8. The pressure elements 2 are now displaced along an offset axis 9 relative to one another. The offset axis 9 is aligned transversely to a longitudinal direction of the first thermoplastic textile thread 7 and the second thermoplastic textile thread 8 .

Fig. 6 zeigt eine schematische Darstellung der Druckelemente 2 der Ausführungsform der Fadenverbindüngsvorrichtung während des Verbindungsvorgangs in einer Schnittansicht. Die thermoplastischen Textilfäden haben sich miteinander verbunden, wodurch eine Verbindungsstelle 10 entstanden ist, deren Querschnitt vorliegend sichtbar ist. Die Verbindungsstelle 10 muss anschließend verstreckt werden, um ihre Querschnittsfläche zu reduzieren. 6 shows a schematic representation of the pressure elements 2 of the embodiment of the thread connecting device during the connecting process in a sectional view. The thermoplastic textile threads have connected to one another, as a result of which a connection point 10 has arisen, the cross section of which can be seen in the present case. The joint 10 must then be stretched to reduce its cross-sectional area.

B E Z U G S Z E I C H E N L I S T EREFERENCE MARKS L I S T E

1.1.
Fadenverbindungsvorrichtungthread connecting device
2.2.
Druckelementpressure element
3.3.
Druckvorrichtungprinting device
4.4.
Energieeintragsvorrichtungenergy input device
5.5.
Erster FadenkammFirst thread comb
6.6.
Zweiter FadenkammSecond thread comb
7.7.
Erster thermoplastischer TextilfadenFirst thermoplastic textile thread
8.8th.
Zweiter thermoplastischer TextilfadenSecond thermoplastic textile thread
9.9.
Versatzachseoffset axis
10.10
Verbindungsstelleconnection point
21.21
Anpressoberflächepressing surface
23.23
Kettbaumwarp beam

Claims (9)

  1. Thread connecting device (1) for connecting a first thermoplastic textile thread (7) to a second thermoplastic textile thread (8), the thread connecting device (1) having a pressure device (3) for exerting a mechanical contact pressure on a pair of threads formed by the first thermoplastic textile thread (7) and the second thermoplastic textile thread (8), and having an energy input device (4) for welding the pair of threads while the pair of threads is arranged in the pressure device (3), wherein the pressure device (3) comprises two pressure elements (2) each having a pressure surface (21), at least one of the pressure elements (2) being coupled to a drive, characterized in that the drive can displace the pressure element (2) in a direction transverse to a longitudinal direction of the first thermoplastic textile thread (7) and the second thermoplastic textile thread (8) when the first thermoplastic textile thread (7) and the second thermoplastic textile thread (8) are clamped between the pressure surfaces (21).
  2. Thread connecting device (1) according to claim 1, characterized in that the energy input device (4) is an ultrasonic generator.
  3. Thread connecting device (1) according to claim 1, characterized in that the energy input device (4) is a heating element.
  4. Thread connecting device (1) according to any one of the preceding claims, characterized in that the energy input device (4) is coupled to the pressure device (3).
  5. Thread connecting device (1) according to one of the preceding claims, characterized in that the pressure elements (2) are displaceable in a direction perpendicular to the pressing surfaces (21).
  6. Thread connecting device (1) according to one of the preceding claims, characterized in that the thread connecting device (1) comprises a positioning device for positioning the first thermoplastic textile thread (7) and the second thermoplastic textile thread (8) in a region of the pressure device (3).
  7. Thread connecting device (1) according to claim 6, characterized in that the positioning device comprises a first pair of thread combs for supporting said first thermoplastic textile thread (7) and a second pair of thread combs for supporting said second thermoplastic textile thread (8), each pair of thread combs comprising a first thread comb (5) and a second thread comb (6), said first thread comb (5) and said second thread comb (6) being arranged in opposite sides of said pressure device (3).
  8. Thread connecting device (1) according to one of the preceding claims, characterized in that the thread connecting device (1) comprises at least one drawing device for drawing the first thermoplastic textile yarn (7) and/or the second thermoplastic textile yarn (8).
  9. Warp knitting machine having a thread connecting device (1) according to one of the preceding claims.
EP19199844.2A 2019-09-26 2019-09-26 Thread connecting device and warp knitting machine comprising a thread connecting device Active EP3798341B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19199844.2A EP3798341B1 (en) 2019-09-26 2019-09-26 Thread connecting device and warp knitting machine comprising a thread connecting device
CN201911372264.9A CN112553771A (en) 2019-09-26 2019-12-27 Yarn joining device and warp knitting machine with yarn joining device
TW109123035A TWI817023B (en) 2019-09-26 2020-07-08 Yarn splicing device and warp knitting machine with yarn splicing device
KR1020200101285A KR102417782B1 (en) 2019-09-26 2020-08-12 Yarn connecting device and Warp knitting machine with a yarn connecting device

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Application Number Priority Date Filing Date Title
EP19199844.2A EP3798341B1 (en) 2019-09-26 2019-09-26 Thread connecting device and warp knitting machine comprising a thread connecting device

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EP3798341A1 EP3798341A1 (en) 2021-03-31
EP3798341B1 true EP3798341B1 (en) 2022-08-24

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KR (1) KR102417782B1 (en)
CN (1) CN112553771A (en)
TW (1) TWI817023B (en)

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KR102686905B1 (en) 2022-07-06 2024-07-19 김창묵 Threads connecting device
CN116065295B (en) * 2022-12-26 2024-11-08 绍兴超弦针纺有限公司 Automatic warp tying machine assisting yarn feeding

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KR20210036801A (en) 2021-04-05
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TWI817023B (en) 2023-10-01
KR102417782B1 (en) 2022-07-05
TW202113183A (en) 2021-04-01

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