EP0024695B1 - Yarn breakage detector for multiple wound single yarns - Google Patents

Yarn breakage detector for multiple wound single yarns Download PDF

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Publication number
EP0024695B1
EP0024695B1 EP80104982A EP80104982A EP0024695B1 EP 0024695 B1 EP0024695 B1 EP 0024695B1 EP 80104982 A EP80104982 A EP 80104982A EP 80104982 A EP80104982 A EP 80104982A EP 0024695 B1 EP0024695 B1 EP 0024695B1
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EP
European Patent Office
Prior art keywords
yarn
denier
thread
breakage detector
measuring device
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EP80104982A
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German (de)
French (fr)
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EP0024695A1 (en
Inventor
Eberhard Krenzer
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Oerlikon Barmag AG
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Barmag Barmer Maschinenfabrik AG
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Publication of EP0024695A1 publication Critical patent/EP0024695A1/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
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • 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 break monitoring device, by means of which an output signal dependent on a measured value for interrupting the thread conveyance is generated in a method in which several individual components or individual threads are brought together in a technical point to form a total thread and the entire thread is conveyed by thread supply mechanisms and thereby processed and subsequently wound up is arranged, the yarn break monitoring device between the first yarn feeder and the take-up and is connected to a device for interrupting the yarn feed.
  • Treatment methods of this type in which the entire thread is, for example, stretched, crimped, blast textured, shrunk or subjected to a process in which its latent crimp is developed and in which the total thread consists of several proportions of the same or different polymers (multicomponent threads, folded threads) are known .
  • US-A 4117654 describes, for example, a method of this type, in which an effect thread is produced from several individual threads.
  • the need for thread break monitoring occurs e.g. also in a method for texturing threads, which is known from DE-B 1 685 652, and in which three threads are drawn off from delivery bobbins, folded into a total thread and passed as a total thread through a blow texturing device.
  • a suitable texturing method for this is given in DE-A 2 749 867.
  • thread break detectors have been used for this purpose, which merely determine whether a thread is present or not. To do this, these thread break detectors must be arranged on the thread path of each individual thread and the total thread. This is complex in design and operation and prone to failure.
  • the invention specified in the claims solves the task of simplifying the thread break monitoring device technology and making it safer and more user-friendly in its mode of operation.
  • a titer measuring device as a thread break monitoring device has the advantage that a single such titre measuring device is sufficient to simultaneously monitor all individual threads to be shed and the entire thread for thread break.
  • the use of the titer according to the invention is recommended for blast texturing of multifilament threads, e.g. in the process according to DE-A 2 749 867.
  • the titre measuring device is used in any case in the thread run between the specialist point and the winding, possibly also in front of the texturing nozzle, for monitoring the entire thread.
  • This titre meter responds if one or more of the individual threads fail as a result of a thread break or if the entire thread breaks.
  • the proposed use of a single titre measuring device replaces several thread break detectors and simplifies the operation of the machine.
  • a thread cutting device is advantageously used as the device for interrupting the thread conveyance, which is arranged in the thread run behind the specialist point and in front of the first thread feed mechanism. As a result, all the individual threads brought together in the overall thread are cut before they reach the first supplying unit, so that no more threads are drawn off the delivery spools, although the supplying unit, which can be rigidly coupled to the main drive of the entire machine, does not necessarily have to be stopped.
  • preparation liquid it may be advantageous to arrange the titer in front of the device for applying this preparation liquid in order to prevent the measured values from being falsified, since the applied preparation liquid can change the titer of the thread in an uncontrollable manner.
  • Titre measuring devices - including those that work electrically capacitively - are known per se.
  • Titer gauges are e.g. used in thread cleaners, e.g. are described in DE-B 1 560 634 or DE-A 2 417 762.
  • the measurement range of the titre measuring device used can be adjustable both in its scope and in its position relative to the titre setpoint.
  • the usual titre meters have a response accuracy of more than 1% and are also operated in this way. According to the present invention, however, regardless of its accuracy, the titre measuring device is used in such a way that the interruption of the thread conveyance only occurs outside a “dead zone”, which is still a permissible negative deviation of the titre measurement value is defined by the titer setpoint of the total thread and its size depends on the titer proportion of the smallest individual component in the total titer. Such titer proportions of the individual component are usually not less than 10% of the total titer, so that the dead zone also comprises at least a ten percent negative deviation from the total titer.
  • the device for interrupting the thread conveyance - e.g. B. a thread cutting device - be set up so that it only responds when the deviation of the titer measurement value from the titer setpoint of the total thread is more than a desired, set proportion of the titer of a single thread.
  • the titer does not generate a signal or only a signal that is not sufficient to interrupt the thread feed.
  • a signal which is not suitable for interrupting the thread conveyance, can advantageously be used for quality monitoring of the total thread produced within the quality tolerances defined by the dead zone and z. B. recorded as a curve; these signals do not switch the device for interrupting the thread feed. If the dead zone is undershot, regardless of the extent of the undershoot, the titer delivers an identical signal - i.e. no analog signal - which interrupts the thread feed.
  • the titer has a dead zone - according to the definition given above - above and below the titer setpoint and preferably in the range between 105% and 80% of the titer setpoint of the total thread.
  • the number of individual threads is not limited to three threads; the application is possible for all the number of folds commonly used in the textile industry. Threads of different provenance - e.g. made of different materials - e.g. Polyester and polyamide 6 - used. "Single threads" can also be components that are combined into one or more multi-component threads as "total thread”.
  • elements 11, 12 and 13 shown in dashed lines show the position of the thread breakage detectors used in the previous blow texturing machines for the individual threads and their connection to the thread cutter 14 for all individual threads.
  • element 17, shown in broken lines shows the position of the thread break detector previously used for the entire thread after texturing, which also has a connection to thread cutter 14.
  • the thread breakage detectors 11, 12, 13 and 17 have now been replaced by the only titer measuring device 18 which, in the event of a deviation from the predetermined target value range, has a z. B. independent of the extent of the deviation - that is, not analog - output signal, which is used in the illustrated embodiment via the converter 16 for actuating the thread cutter 14.
  • the thread or all thread components approaching a texturing point are cut in order to avoid the production of waste or damage to the machine by winders on the supply units located between the thread cutting device and the winding device.
  • the titre measuring device is preferably arranged behind the texturing nozzle 7 and in front of the traversing triangle formed between the thread guide 15 and the winding 5, preferably behind the last delivery mechanism 4, but in front of the so-called preparation roller 19. It detects titer deviations of the entire thread and interrupts production by the thread cutter 14 if deviations which are specified as inadmissible occur.
  • threads can also be further processed and, according to the invention, monitored for thread breakage by a titer measuring device, which consist of two or more than two polymers and whose filaments are spun «side by side» or as a «core-shell structure» from common nozzle bores.
  • a titer measuring device which consist of two or more than two polymers and whose filaments are spun «side by side» or as a «core-shell structure» from common nozzle bores.
  • the arrangement of the titre measuring device is such that the success of the process step "folding the individual components into a total thread " is only determined after the processing stage in which the structure of the individual components can still be changed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Description

Die Erfindung betrifft eine Fadenbruchüberwachungseinrichtung, durch welche ein von einem Messwert abhängiges Ausgangssignal zur Unterbrechung der Fadenförderung in einem Verfahren erzeugt wird, bei dem mehrere Einzelkomponenten bzw. Einzelfäden in einem Fachpunkt zu einem Gesamtfaden zusammengeführt und der Gesamtfaden durch Fadenlieferwerke gefördert und dabei bearbeitet und anschliessend aufgewickelt wird, wobei die Fadenbruchüberwachungseinrichtung zwischen dem ersten Fadenlieferwerk und der Aufwicklung angeordnet und mit einer Einrichtung zur Unterbrechung der Fadenförderung verbunden ist.The invention relates to a thread break monitoring device, by means of which an output signal dependent on a measured value for interrupting the thread conveyance is generated in a method in which several individual components or individual threads are brought together in a technical point to form a total thread and the entire thread is conveyed by thread supply mechanisms and thereby processed and subsequently wound up is arranged, the yarn break monitoring device between the first yarn feeder and the take-up and is connected to a device for interrupting the yarn feed.

Derartige Behandlungsverfahren, bei denen der Gesamtfaden beispielsweise gestreckt, gekräuselt, blastexturiert, geschrumpft oder einem Vorgang unterworfen wird, bei dem seine latente Kräuselung entwickelt wird und bei welchen der Gesamtfaden aus mehreren Anteilen gleicher oder unterschiedlicher Polymerer (Mehrkomponentenfäden, gefachte Fäden) besteht, sind bekannt.Treatment methods of this type, in which the entire thread is, for example, stretched, crimped, blast textured, shrunk or subjected to a process in which its latent crimp is developed and in which the total thread consists of several proportions of the same or different polymers (multicomponent threads, folded threads) are known .

Die US-A 4117654 beschreibt beispielsweise ein Verfahren dieser Art, bei dem ein Effektfaden aus mehreren Einzelfäden hergestellt wird.US-A 4117654 describes, for example, a method of this type, in which an effect thread is produced from several individual threads.

Die Notwendigkeit einer Fadenbruchüberwachung tritt z.B. auch bei einem Verfahren zum Texturieren von Fäden auf, das nach der DE-B 1 685 652 bekannt ist, und bei welchem drei Fäden von Lieferspulen abgezogen, zu einem Gesamtfaden gefacht und als Gesamtfaden durch eine Blastexturiereinrichtung geführt werden. Ein geeignetes Texturierverfahren hierfür ist in der DE-A 2 749 867 angegeben.The need for thread break monitoring occurs e.g. also in a method for texturing threads, which is known from DE-B 1 685 652, and in which three threads are drawn off from delivery bobbins, folded into a total thread and passed as a total thread through a blow texturing device. A suitable texturing method for this is given in DE-A 2 749 867.

Im industriellen Einsatz von Texturiermaschinen zur Durchführung derartiger Texturierverfahren ist es notwendig, jeden einzelnen Faden wie auch den Gesamtfaden auf Fadenbruch zu überwachen, damit im Falle des Bruchs nur eines Einzelfadens oder des Gesamtfadens die Bearbeitungsstelle rechtzeitig von Hand oder selbsttätig in Abhängigkeit von einem Ausgangssignal eines Fadenbruchdetektors abgestellt werden kann.In the industrial use of texturing machines to carry out such texturing processes, it is necessary to monitor each individual thread as well as the entire thread for thread breakage, so that in the event of the breakage of only a single thread or the entire thread, the processing point in time by hand or automatically depending on an output signal from a thread breakage detector can be turned off.

Bisher werden hierzu Fadenbruchdetektoren verwendet, die lediglich feststellen, ob ein Faden vorhanden ist oder nicht vorhanden ist. Und zwar müssen dazu diese Fadenbruchdetektoren am Fadenlauf jedes Einzelfadens und des Gesamtfadens angeordnet werden. Das ist in Ausführung und Bedienung aufwendig und störanfällig.So far, thread break detectors have been used for this purpose, which merely determine whether a thread is present or not. To do this, these thread break detectors must be arranged on the thread path of each individual thread and the total thread. This is complex in design and operation and prone to failure.

Die in den Ansprüchen angegebene Erfindung löst die Aufgabe, die Fadenbruchüberwachung gerätetechnisch zu vereinfachen und in ihrer Arbeitsweise sicherer und bedienungsfreundlicher zu machen.The invention specified in the claims solves the task of simplifying the thread break monitoring device technology and making it safer and more user-friendly in its mode of operation.

Die Anwendung eines Titermessgerätes als Fadenbruchüberwachungseinrichtung hat den Vorteil, dass ein einziges solches Titermessgerät genügt, um gleichzeitig alle zu fachenden Einzelfäden und den Gesamtfaden auf Fadenbruch zu überwachen. Vorteilhafterweise empfiehlt sich die Anwendung des Titermessgerätes nach der Erfindung beim Blastexturieren gefachter Multifilamentfäden wie z.B. im Verfahren nach der DE-A 2 749 867. Bei diesem Blastexturierverfahren wird das Titermessgerät in jedem Falle im Fadenlauf zwischen dem Fachpunkt und der Aufwicklung, ggf. auch vor der Texturierdüse zur Überwachung des Gesamtfadens eingesetzt. Dieses Titermessgerät spricht an, wenn einer oder mehrere der Einzelfäden infolge Fadenbruchs ausfallen oder auch, wenn der Gesamtfaden reisst. Durch den vorgeschlagenen Einsatz eines einzigen Titermessgerätes werden mehrere Fadenbruchdetektoren ersetzt und die Bedienung der Maschine vereinfacht.The use of a titer measuring device as a thread break monitoring device has the advantage that a single such titre measuring device is sufficient to simultaneously monitor all individual threads to be shed and the entire thread for thread break. Advantageously, the use of the titer according to the invention is recommended for blast texturing of multifilament threads, e.g. in the process according to DE-A 2 749 867. In this blast texturing process, the titre measuring device is used in any case in the thread run between the specialist point and the winding, possibly also in front of the texturing nozzle, for monitoring the entire thread. This titre meter responds if one or more of the individual threads fail as a result of a thread break or if the entire thread breaks. The proposed use of a single titre measuring device replaces several thread break detectors and simplifies the operation of the machine.

Zusätzlich besteht die Möglichkeit, unzulässige Titerabweichungen der Einzelfäden zu erfassen, was insbesondere dann von Bedeutung ist, wenn auf der Texturiermaschine nichtverstreckte oder nur teilverstreckte Fäden vorgelegt werden, die auf der Texturiermaschine vor dem Einführen in die Texturierdüse in einer vorgeordneten Verstreckzone ihre endgültige Verstreckung erhalten.In addition, there is the possibility of detecting inadmissible titer deviations of the individual threads, which is particularly important if undrawn or only partially stretched threads are presented on the texturing machine, which receive their final stretching on the texturing machine before being introduced into the texturing nozzle in an upstream stretching zone.

Als Einrichtung zur Unterbrechung der Fadenförderung wird vorteilhafterweise eine Fadenschneideinrichtung verwendet, die im Fadenlauf hinter dem Fachpunkt und vor dem ersten Fadenlieferwerk angeordnet wird. Hierdurch werden alle im Gesamtfaden zusammengeführten Einzelfäden durchgeschnitten, bevor sie das erste Lieferwerk erreichen, so dass keine Fäden mehr von den Lieferspulen abgezogen werden, obwohl das Lieferwerk, welches mit dem Hauptantrieb der gesamten Maschine starr gekuppelt sein kann, nicht unbedingt stillgesetzt werden muss.A thread cutting device is advantageously used as the device for interrupting the thread conveyance, which is arranged in the thread run behind the specialist point and in front of the first thread feed mechanism. As a result, all the individual threads brought together in the overall thread are cut before they reach the first supplying unit, so that no more threads are drawn off the delivery spools, although the supplying unit, which can be rigidly coupled to the main drive of the entire machine, does not necessarily have to be stopped.

Durch die Anordnung des Titermessgerätes unmittelbar vor der Aufwicklung bzw. hinter dem letzten Fadenlieferwerk wird der gesamte Fadenlauf, beginnend bei den Lieferspulen der Einzelfäden, über den Fachpunkt, die Bearbeitungsaggregate bis zur Aufwickeleinrichtung sicher auf Fadenbruch überwacht.Due to the arrangement of the titer directly before the winding or behind the last thread supply unit, the entire thread run, starting with the delivery spools of the individual threads, through the technical point, the processing units to the winding device is reliably monitored for thread breakage.

Wenn der Auftrag von Präparationsflüssigkeit vorgesehen ist, kann es vorteilhaft sein, das Titermessgerät vor der Einrichtung zum Auftragen dieser Präparationsflüssigkeit anzuordnen, um zu verhindern, dass die Messwerte verfälscht werden, da die aufgetragene Präparationsflüssigkeit den Titer des Fadens unkontrollierbar verändern kann.If the application of preparation liquid is provided, it may be advantageous to arrange the titer in front of the device for applying this preparation liquid in order to prevent the measured values from being falsified, since the applied preparation liquid can change the titer of the thread in an uncontrollable manner.

Titermessgeräte - darunter auch solche, die elektrisch kapazitiv arbeiten - sind an sich bekannt. Titermessgeräte werden z.B. in Fadenreinigern eingesetzt, wie sie z.B. in der DE-B 1 560 634 oder DE-A 2 417 762 beschrieben sind.Titre measuring devices - including those that work electrically capacitively - are known per se. Titer gauges are e.g. used in thread cleaners, e.g. are described in DE-B 1 560 634 or DE-A 2 417 762.

Der Messbereich des eingesetzten Titermessgerätes kann sowohl in seinem Umfang als auch in seiner Lage zum Titersollwert einstellbar sein.The measurement range of the titre measuring device used can be adjustable both in its scope and in its position relative to the titre setpoint.

Die üblichen Titermessgeräte haben eine Ansprechgenauigkeit von mehr als 1% und werden auch so betrieben. Nach der vorliegenden Erfindung wird das Titermessgerät jedoch - ungeachtet seiner Genauigkeit - so eingesetzt, dass die Unterbrechung der Fadenförderung erst ausserhalb eines «Totbereiches» eintritt, der als noch zulässige negative Abweichung des Titermesswertes vom Titersollwert des Gesamtfadens definiert ist und dessen Grösse abhängig ist vom Titeranteil der geringsten Einzelkomponente am Gesamttiter. Üblicherweise liegen derartige Titeranteile der Einzelkomponente nicht unter 10% des Gesamttiters, so dass der Totbereich auch mindestens eine zehnprozentige negative Abweichung vom Gesamttiter umfasst.The usual titre meters have a response accuracy of more than 1% and are also operated in this way. According to the present invention, however, regardless of its accuracy, the titre measuring device is used in such a way that the interruption of the thread conveyance only occurs outside a “dead zone”, which is still a permissible negative deviation of the titre measurement value is defined by the titer setpoint of the total thread and its size depends on the titer proportion of the smallest individual component in the total titer. Such titer proportions of the individual component are usually not less than 10% of the total titer, so that the dead zone also comprises at least a ten percent negative deviation from the total titer.

Beim Fachen mehrerer Multifilamentfäden zu einem Gesamtfaden ergibt sich darüberhinaus das Problem, dass Einzelfilamente brechen und unter Umständen Wickler bilden. Während eine gewisse Anzahl von Brüchen qualitativ toleriert werden kann und aus wirtschaftlichen Gründen nicht zur Unterbrechung des Verfahrens führen sollte, stellt der Ausfall von einem Viertel der Einzelfilamente eines Einzelfadens in dem Gesamtfaden eine nicht mehr tolerierbare Störung des Fachprozesses dar, so dass hier erfindungsgemäss die Unterbrechung der Fadenförderung vorzugsweise erfolgt.When folding multiple multifilament threads to form a total thread, there is also the problem that individual filaments break and may form winders. While a certain number of breaks can be tolerated qualitatively and should not lead to an interruption of the process for economic reasons, the failure of a quarter of the individual filaments of a single thread in the overall thread represents an intolerable disturbance of the specialist process, so that here the interruption according to the invention the thread conveyance is preferably carried out.

Dieses kann einmal durch entsprechende Einstellung des Messbereiches des Titermessgerätes erreicht werden, anderseits aber kann auch die Einrichtung zur Unterbrechung der Fadenförderung - z. B. eine Fadenschneideinrichtung - so eingerichtet sein, dass sie erst anspricht, wenn die Abweichung des Titermesswertes vom Titersollwert des Gesamtfadens nach unten mehr als einen gewünschten, eingestellten Anteil des Titers eines Einzelfadens beträgt.This can be achieved by adjusting the measuring range of the titer, but on the other hand, the device for interrupting the thread conveyance - e.g. B. a thread cutting device - be set up so that it only responds when the deviation of the titer measurement value from the titer setpoint of the total thread is more than a desired, set proportion of the titer of a single thread.

Innerhalb des Totbereichs erzeugt das Titermessgerät kein Signal oder lediglich ein solches Signal, das zur Unterbrechung der Fadenförderung nicht ausreicht. Ein derartiges, zur Unterbrechung der Fadenförderung nicht geeignetes Signal kann vorteilhaft zur Qualitätsüberwachung des erzeugten Gesamtfadens innerhalb der durch den Totbereich definierten Qualitätstoleranzen genutzt und z. B. als Kurve aufgezeichnet werden; durch diese Signale wird nicht die Einrichtung zur Unterbrechung der Fadenförderung geschaltet. Bei Unterschreitung des Totbereiches liefert das Titermessgerät unabhängig vom Mass der Unterschreitung jedesmal ein identisches Signal - also kein analoges Signal -, welches die Unterbrechung der Fadenförderung bewirkt.Within the dead zone, the titer does not generate a signal or only a signal that is not sufficient to interrupt the thread feed. Such a signal, which is not suitable for interrupting the thread conveyance, can advantageously be used for quality monitoring of the total thread produced within the quality tolerances defined by the dead zone and z. B. recorded as a curve; these signals do not switch the device for interrupting the thread feed. If the dead zone is undershot, regardless of the extent of the undershoot, the titer delivers an identical signal - i.e. no analog signal - which interrupts the thread feed.

Vorzugsweise besitzt das Titermessgerät einen Totbereich - gemäss der oben angegebenen Definition - oberhalb und unterhalb des Titersollwertes und vorzugsweise im Bereich zwischen 105% und 80% des Titersollwertes des Gesamtfadens.Preferably, the titer has a dead zone - according to the definition given above - above and below the titer setpoint and preferably in the range between 105% and 80% of the titer setpoint of the total thread.

Im folgenden wird die erfindungsgemässe Fadenbruchüberwachüngseinrichtung anhand der Zeichnung und des in der DE-A 2749867 beschriebenen Verfahrens näher erläutert.The thread break monitoring device according to the invention is explained in more detail below with reference to the drawing and the method described in DE-A 2749867.

In dem dort beschriebenen Verfahren werden drei Einzelfäden 6 in einem Fadenführer 20 - der den Fachpunkt darstellt - zusammengeführt und dann gemeinsam als Gesamtfaden durch die Texturierdüse 7 geführt. Hinsichtlich der erfindungsgemässen Anwendung eines Titermessgerätes ist die Anzahl der Einzelfäden nicht auf drei Fäden beschränkt; die Anwendung ist für alle in der Textilindustrie gebräuchlichen Verfachungszahlen möglich. Als Einzelfäden werden vorzugsweise Fäden unterschiedlicher Provenienz - z.B. aus unterschiedlichen Materialien - z.B. Polyester und Polyamid 6 - eingesetzt. «Einzelfäden» können auch Komponenten sein, die zu einem oder mehreren Mehrkomponentenfäden als «Gesamtfaden» zusammengeführt werden.In the method described there, three individual threads 6 are brought together in a thread guide 20 - which represents the technical point - and then passed together as a total thread through the texturing nozzle 7. With regard to the use of a titre measuring device according to the invention, the number of individual threads is not limited to three threads; the application is possible for all the number of folds commonly used in the textile industry. Threads of different provenance - e.g. made of different materials - e.g. Polyester and polyamide 6 - used. "Single threads" can also be components that are combined into one or more multi-component threads as "total thread".

Es sei bemerkt, dass die gestrichelt eingezeichneten Elemente 11, 12 und 13 die Position der in den bisherigen Blastexturiermaschinen eingesetzten Fadenbruchdetektoren für die Einzelfäden sowie ihre Verbindung zu dem Fadenschneider 14 für alle Einzelfäden zeigen. Das gestrichelt eingezeichnete Element 17 zeigt die Position des bisher eingesetzten Fadenbruchdetektors für den Gesamtfaden nach der Texturierung, der ebenfalls eine Verbindung zu dem Fadenschneider 14 besitzt.It should be noted that the elements 11, 12 and 13 shown in dashed lines show the position of the thread breakage detectors used in the previous blow texturing machines for the individual threads and their connection to the thread cutter 14 for all individual threads. Element 17, shown in broken lines, shows the position of the thread break detector previously used for the entire thread after texturing, which also has a connection to thread cutter 14.

An die Stelle der Fadenbruchdetektoren 11, 12, 13 und 17 ist erfindungsgemäss nunmehr das einzige Titermessgerät 18 getreten, welches bei Abweichung von dem vorgegebenen Sollwertbereich ein z. B. vom Mass der Abweichung unabhängiges - also nicht analoges - Ausgangssignal gibt, welches in dem dargestellten Ausführungsbeispiel über den Wandler 16 zur Betätigung des Fadenschneiders 14 verwandt wird. Durch Betätigung des Fadenschneiders wird der Faden bzw. werden alle einer Texturierstelle zulaufenden Fadenkomponenten geschnitten, um die Produktion von Abfall oder eine Maschinenbeschädigung durch Wickler auf den zwischen der Fadenschneideinrichtung und der Aufwickeleinrichtung liegenden Lieferwerken zu vermeiden.The thread breakage detectors 11, 12, 13 and 17 have now been replaced by the only titer measuring device 18 which, in the event of a deviation from the predetermined target value range, has a z. B. independent of the extent of the deviation - that is, not analog - output signal, which is used in the illustrated embodiment via the converter 16 for actuating the thread cutter 14. By actuating the thread cutter, the thread or all thread components approaching a texturing point are cut in order to avoid the production of waste or damage to the machine by winders on the supply units located between the thread cutting device and the winding device.

Das Titermessgerät ist vorzugsweise hinter der Texturierdüse 7 und vor dem zwischen dem Fadenführer 15 und der Aufwicklung 5 gebildeten Changierdreieck, vorzugsweise hinter dem letzten Lieferwerk 4, aber vor der sogenannten Präparationswalze 19 angeordnet. Es erfasst Titerabweichungen des Gesamtfadens und unterbricht durch den Fadenschneider 14 die Produktion, wenn als unzulässig vorgegebene Abweichungen auftreten.The titre measuring device is preferably arranged behind the texturing nozzle 7 and in front of the traversing triangle formed between the thread guide 15 and the winding 5, preferably behind the last delivery mechanism 4, but in front of the so-called preparation roller 19. It detects titer deviations of the entire thread and interrupts production by the thread cutter 14 if deviations which are specified as inadmissible occur.

Abweichend von der Anordnung nach der Zeichnung können an die Stelle der Ablaufspulen andere Fadenlieferstellen, z.B. Spinndüsen treten. Diese Spinndüsen können zum einen Fasern aus unterschiedlichen Polymeren liefern, die nach ihrem Erstarren zu einem Gesamtfaden zusammengeführt werden.Deviating from the arrangement according to the drawing, other thread delivery points, e.g. Kick spinnerets. On the one hand, these spinnerets can deliver fibers made of different polymers, which, after solidification, are combined to form a total thread.

Zum anderen können aber auch Fäden weiterverarbeitet und erfindungsgemäss von einem Titermessgerät auf Fadenbruch überwacht werden, die aus zwei oder mehr als zwei Polymeren bestehen und deren Filamente «Seite an Seite» oder aber als «Kern-Mantel-Struktur» aus gemeinsamen Düsenbohrungen ausgesponnen werden.On the other hand, threads can also be further processed and, according to the invention, monitored for thread breakage by a titer measuring device, which consist of two or more than two polymers and whose filaments are spun «side by side» or as a «core-shell structure» from common nozzle bores.

Bei allen Anwendungsfällen ist die Anordnung des Titermessgerätes jedoch so getroffen, dass der Erfolg des Verfahrensschrittes «Fachen der Einzelkomponenten zu einem Gesamtfaden" erst im Anschluss an die Bearbeitungsstufe ermittelt wird, in der die Struktur der Einzelkomponenten noch verändert werden kann.In all applications, however, the arrangement of the titre measuring device is such that the success of the process step "folding the individual components into a total thread " is only determined after the processing stage in which the structure of the individual components can still be changed.

Claims (8)

1. Yarn breakage detector (17) which produces an output signal in response to a measuring value to interrupt the conveyance of the yarn during a process, in which a plurality of individual threads (6) are plied in a plying point (20) into an aggregate yarn, and the aggregate yarn is conveyed by yarn delivery means (1, 2, 3, 4) while being treated and subsequently wound up, with the yarn breakage detector (17) being arranged between the first yarn delivery means (1) and the winding means (15) and connected with a means (14) for interrupting the conveyance of the yarn, characterized by the fact that the said yarn breakage detector comprises a denier measuring device (18) which measures the denier of the aggregate yarn and that the means (14) connected with the denier measuring device (18) interrupts the conveyance of the yarn, if the measured denier value exhibits a variation below the desired denier value of the aggregate yarn by more than 10% of the denier of the individual threads.
2. Yarn breakage detector according to claim 1, characterized by the fact that the means for interrupting the yarn conveyance is a yarn cutting means (14) which is arranged in the direction of the yarn run behind the plying point (20) and in front of the first yarn delivery means (1) and which is actuated by the output signal of the denier measuring device (18).
3. Yarn breakage detector according to claim 1 or 2, characterized by the fact that the denier measuring device (18) is arranged behind the last yarn delivery means (4) and in front of the winding means (5).
4. Yarn breakage detector according to claim 1 or 2, characterized by the fact that in an air-jet texturizing process, in which the aggregate yarn plied from a plurality of individual threads (6) is fed through an air-jet texturizing nozzle (7), the denier measuring device (18) is arranged behind the air-jet texturizing nozzle (7).
5. Yarn breakage detector according to claim 4, characterized by the fact that the yarn cutting means (14) is arranged in front of the yarn delivery means (1) which is positioned in front of the iex- turizing nozzle (7) and behind the plying point (20).
6. Yarn breakage detector according to claim 4, characterized by the fact that the denier measuring device (18) is arranged between the last yarn delivery means (4) and the winding means (5) and in front of a means (19) for applying a preparation liquid to the aggregate yarn.
7. Yarn breakage detector according to any one or several ones of preceeding claims, characterized by the fact that the means (14) for interrupting the yarn conveyance is actuated only if the value measured by the denier measuring device (18) exhibits a variation below the desired denier value of the aggregate yarn by more than 25% of the denier of the individual thread (6).
8. Yarn breakage detector according to any one or several ones of the preceding claims, characterized by the fact that the denier measuring device (18) has a dead zone above and below the desired denier value and preferably within the range of 105% and 80% of the desired denier value of the aggregate yarn.
EP80104982A 1979-08-24 1980-08-21 Yarn breakage detector for multiple wound single yarns Expired EP0024695B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792934325 DE2934325A1 (en) 1979-08-24 1979-08-24 TEXTURING MACHINE WITH AN AIR OR STEAM-TEXTURED GRAY
DE2934325 1979-08-24

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EP0024695A1 EP0024695A1 (en) 1981-03-11
EP0024695B1 true EP0024695B1 (en) 1985-02-06

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EP80104982A Expired EP0024695B1 (en) 1979-08-24 1980-08-21 Yarn breakage detector for multiple wound single yarns

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EP (1) EP0024695B1 (en)
DE (2) DE2934325A1 (en)

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Publication number Priority date Publication date Assignee Title
DE3808957A1 (en) * 1988-03-17 1989-09-28 Mayer Fa Karl SPECIAL REELING MACHINE
US5054174A (en) * 1988-12-13 1991-10-08 Barmag Ag Method of producing an air textured yarn

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Publication number Priority date Publication date Assignee Title
NL120426C (en) * 1961-07-25
DE1288339B (en) * 1963-10-09 1969-01-30 Reiners Device for electro-optical monitoring of threads or similar goods
CH526782A (en) * 1970-08-29 1972-08-15 Asahi Chemical Ind Method and device for measuring yarn defects
DE2132137A1 (en) * 1971-06-29 1973-01-18 R & M Leuze Fa Filament quality monitor - with photoelectric pickup , fet and operational amplifier as comparator
JPS544221B2 (en) * 1972-03-24 1979-03-03
US3829751A (en) * 1973-04-20 1974-08-13 Gen Electric Apparatus for controlling variation in a characteristic of strand-like material
CH620655A5 (en) * 1977-06-17 1980-12-15 Loepfe Ag Geb
JPS5947738B2 (en) * 1978-03-07 1984-11-21 帝人株式会社 Manufacturing method of bulky yarn
DE2749867C2 (en) * 1977-11-08 1988-11-10 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Process for making a crimped yarn from continuous multifilament fibers
US4117654A (en) * 1977-11-18 1978-10-03 Institute Po Obleklo I Textil Method of and apparatus for the control of composite effect yarns

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DE3070106D1 (en) 1985-03-21
DE2934325A1 (en) 1981-09-10
EP0024695A1 (en) 1981-03-11

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