EP0282713B1 - Method for adjusting the proportion of yarn tension between outer and inner yarn during the production of industrial cabled yarns, and apparatus for carrying out this method - Google Patents

Method for adjusting the proportion of yarn tension between outer and inner yarn during the production of industrial cabled yarns, and apparatus for carrying out this method Download PDF

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Publication number
EP0282713B1
EP0282713B1 EP88101506A EP88101506A EP0282713B1 EP 0282713 B1 EP0282713 B1 EP 0282713B1 EP 88101506 A EP88101506 A EP 88101506A EP 88101506 A EP88101506 A EP 88101506A EP 0282713 B1 EP0282713 B1 EP 0282713B1
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EP
European Patent Office
Prior art keywords
thread
yarn
guide eyelet
thread guide
ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88101506A
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German (de)
French (fr)
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EP0282713A1 (en
Inventor
Johannes Ing. Grad. Frentzel-Beyme
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Palitex Project Co GmbH
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Palitex Project Co GmbH
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Publication of EP0282713A1 publication Critical patent/EP0282713A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • D02G3/285—Doubled, plied, or cabled threads one yarn running over the feeding spool of another yarn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/06—Annular guiding surfaces; Eyes, e.g. pigtails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/86—Multiple-twist arrangements, e.g. two-for-one twisting devices ; Threading of yarn; Devices in hollow spindles for imparting false twist
    • D01H7/868—Yarn guiding means, e.g. guiding tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
    • B65H2402/41—Portable or hand-held apparatus
    • B65H2402/414—Manual tools for filamentary material, e.g. for mounting or removing a bobbin, measuring tension or splicing
    • 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 method for adjusting the thread tension ratio between the outer and inner thread in the manufacture of cabled technical yarns by means of a device in which an outer and an inner thread are brought together in the area of a thread balloon for mutual wrapping and the yarn then runs through a thread guide eyelet .
  • the outer and inner threads have a predetermined thread tension ratio, so that the two yarn components are processed in a certain, preferably identical, length ratio.
  • the location of the cord point in the area of the thread guide eyelet is of particular importance for this.
  • the outer thread of the two yarn components runs through the thread balloon, while the inner thread is guided from a bobbin through a braking system into the vicinity of the apex of the thread balloon. If the cord point changes its position as a result of different thread tension of the outer thread and inner thread, the two yarn components will simultaneously wind around each other in a different ratio.
  • the object on which the invention is based is to develop a method of the type specified in the introduction such that a predetermined tractive force ratio can be set and maintained during the process, that is to say without stopping the thread balloon, or can also be changed by a predetermined value.
  • a predetermined tractive force ratio can be set and maintained during the process, that is to say without stopping the thread balloon, or can also be changed by a predetermined value.
  • the length of the two yarn components to be processed can be set to a certain, preferably the same value, and kept at this value.
  • the method according to the invention can be carried out in accordance with the features of patent claim 2.
  • the single thread tensile forces must be known. However, these can be measured easily, as can the total tensile force above the thread guide eye.
  • the measured values can be processed in an evaluation device and compared with the target value, from which the adjustment variable is then determined.
  • the thread tension ratio can also be determined directly.
  • the method has the features of patent claim 4, in which use is made of a method in which the twist structure of the yarn is determined according to a proposal described in the earlier patent application DE-OS 36 28 654 is.
  • the starting point here is the knowledge that a length unevenness of the yarn components, which occurs due to an uneven thread tension ratio, is noticeable when determining the twist structure.
  • the twisted structure is scanned for its periodicity.
  • a double twist with unequal lengths of the two yarn components is characterized in that the longer thread shows stronger lateral bulges per twisting period than the shorter thread.
  • These lateral bulges mean that when the twisted structure is scanned, two identical amplitude fluctuations do not occur in the output signal of the scanning device per twisted period, but rather a stronger and a weaker amplitude.
  • the output signal therefore contains not only the fundamental frequency, which corresponds to half the period, but also a first subharmonic, which corresponds to the simple twisting period.
  • the intensity of this subharmonic is a measure of the length difference of the yarn components, and thus also a measure of the difference in the thread tension ratio of the two yarn components.
  • the present invention furthermore relates to a device for carrying out the method according to the invention with the features of patent claim 5.
  • Advantageous developments of the device according to the invention are described in patent claims 6 to 9.
  • the device according to the invention also allows fine adjustment of the height of the thread guide eye because of the axial adjustability of the thread guide eye. This is particularly important in the case of devices which have a plurality of thread bobbins and correspondingly a plurality of thread guides, the thread guides generally being arranged on a common device for rough adjustment. Inevitable tolerances in the dimensions of the twisting spindles lead to this one directions each thread guide eyelet is at a slightly different height in relation to its thread spindle. Since the height of the thread guide eyelet in relation to the thread spindle influences the thread tension, this has the consequence that a somewhat different thread tension force relationship exists between the outer thread and the inner thread on each thread spindle.
  • each thread guide eyelet for itself can be precisely adjusted to a predetermined value and this value can be checked and readjusted during the twisting process using the method according to the invention.
  • FIG. 1 only the parts of a device for the production of directly cabled technical yarns are shown, which are important for the method for adjusting the thread tension ratio between outer thread Fa and inner thread Fi.
  • the outer thread Fa is drawn off from a first supply spool 1. It runs through an indicated thread brake device 2 and an axial channel 3.1, a spindle 3, from which it emerges through a radial channel 3.2 and forms a thread balloon B around the spindle 3.
  • the thread guide eyelet 6 is arranged a little above the apex of the thread balloon B.
  • the inner thread Fi is fed at the Kordierddling K, which is drawn off from a second supply spool 4, which is arranged above the spindle 3 inside the thread balloon B within a bobbin 3.3.
  • the inner thread Fi runs through a thread braking device 5 and exits axially at the upper end of the bobbin 3.3.
  • the outer thread Fa and the inner thread Fi are wrapped around one another at the cordage point K.
  • the relationships in the area of the thread guide eyelet 6 and the cord point K are shown in more detail in FIG. 2.
  • the yarn Z twisted from outer thread Fa and inner thread Fi is guided through the thread guide eyelet 6 at the apex of the thread balloon B.
  • the actual eyelet part 6.1 is pot-shaped with a passage opening on the bottom and is guided on its side surface in a guide 6.2 displaceable in the axial direction A.
  • the guide 6.2 is located on a holder 6.3, on which a toothed wheel 6.4 is arranged, which engages in a toothed rack 6.5 arranged on the outside of the eyelet part 6.1.
  • the gear 6.4 rotates, the eyelet part 6.1 thus shifts in the axial direction A.
  • outer thread Fa and inner thread Fi are brought together at the cord point K, the thread tension ratio of the two components having their filamentary fine structure and the twist density produced the angle ⁇ between outer thread Fa and inner thread Fi, and the balloon shape of the outer thread the angle ⁇ determine.
  • the direction of the cabled thread divides the thread joining angle a into the two partial angles a 1 and a 2.
  • the ratio of these two partial angles only depends on the thread tension ratio.
  • the thread tension ratio between outer thread Fa and inner thread Fi can thus be determined in the arrangement according to FIG. 2, for example, in that the angles ⁇ 1 and a 2 are measured automatically just below the thread guide eye 6 and a signal representing the thread tension ratio is generated from the measured value obtained.
  • This signal can then be compared with a target value and a control signal can be generated which is fed to an adjusting device (not shown), for example an adjusting motor, which acts on the gearwheel 6.4 and effects a corresponding axial adjustment of the eyelet part 6.1.
  • an adjusting device for example an adjusting motor, which acts on the gearwheel 6.4 and effects a corresponding axial adjustment of the eyelet part 6.1.
  • this twist structure is influenced by the thread tension in such a way that when it is scanned, a periodic signal is obtained which contains a component which has half the fundamental frequency corresponding to the wavelength of the yarn period and whose relative intensity is a measure of the length difference of the two yarn components and thus also for the different tensile force status of the two yarn components. From this component, the thread tension ratio can be represented be generated signal, which in turn can be compared with a target value. A control signal can be generated from the comparison, which is fed to an adjusting device acting on the gearwheel 6.4, whereby a corresponding axial displacement of the eyelet part 6.1 is brought about.
  • FIG. 3 shows a device 7 designed as a hand-held device, which can be attached to the device for producing directly cabled yarns according to FIGS. 1 and 2 in the area of the thread guide eyelet 6.
  • the device 7 provided with a handle 7.1 has on its front side a sensor head 7.2 with an adjusting head 7.3 arranged underneath.
  • the scanning device 7.21, which emits an electrical output signal, is located in the sensor head 7.2.
  • This scanning device can have, for example, a mechanical scanning element which reacts to changes in the local transverse dimensions of the yarn.
  • the scanning device can also have an optical scanning element which reacts to changes in the local transverse structure of the yarn.
  • Such scanning devices are described in more detail in DE-OS 36 28 654.
  • a positioning motor 7.31 is arranged within the positioning head 7.3, the output shaft 7.32 of which is led out on the outside of the positioning head 7.3 and has a worm shaft 7.33 acting as a coupling member.
  • the device 7 is set in such a way that the adjusting head 7.3 is at the level of the thread guide eyelet 6 and the worm shaft 7.33 engages in the gearwheel 6.4.
  • the sensor head 7.2 is then located at a point above the thread guide eyelet 6, opposite the path of movement of the yarn Z.
  • the electrical signal emitted by the scanning device 7.21 is fed to an evaluation device 7.5 via an amplifier 7.22.
  • the signal for periodic components is examined and analyzed in this evaluation device 5.
  • a signal representing the length difference of the two yarn components is generated from the component, which corresponds to the first subharmonic of the periodic input signal, which is compared with a target value signal which can be predetermined at the input.
  • a control signal is then generated, which is used via a further amplifier 7.34 to control the servomotor 7.31, which shifts the eyelet part 6.1 until the signal supplied by the scanning device 7.21 is determined by the evaluation device 7.5 that the desired target Value is reached.
  • the actual signal can be displayed directly by means of a display device 7.4 arranged on the hand-held device 7, which can be designed, for example, as a screen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Ropes Or Cables (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Einstellung des Fadenzugkraftverhältnisses zwischen Außen- und Innenfaden bei der Herstellung von kablierten technischen Garnen mittels einer Einrichtung, in welcher ein Außen- und ein Innenfaden im Bereich eines Fadenballons zur gegenseitigen Umschlingung zusammengeführt werden und das Garn anschließend durch eine Fadenführeröse läuft.The invention relates to a method for adjusting the thread tension ratio between the outer and inner thread in the manufacture of cabled technical yarns by means of a device in which an outer and an inner thread are brought together in the area of a thread balloon for mutual wrapping and the yarn then runs through a thread guide eyelet .

Ein derartiges Verfahren ist bekannt und beispielsweise in der DE-GM 84 07 900 beschrieben.Such a method is known and described for example in DE-GM 84 07 900.

Beim Herstellen von kablierten technischen Garnen beispielsweise Reifencord, ist es außerordentlich wichtig, daß Außen- und Innenfaden ein vorgegebenes Fadenzugkraftverhältnis aufweisen, so daß die beiden Garnkomponenten in einem bestimmten, vorzugsweise gleichen Längenverhältnis verarbeitet werden. Hierfür ist die Lage des Kordierpunktes im Bereich der Fadenführeröse von besonderer Bedeutung. Von den beiden Garnkomponenten läuft der Außenfaden durch den Fadenballon, während der Innenfaden aus einem Spulentopf über ein Bremssystem in die Nähe des Scheitelpunktes des Fadenballons geleitet wird. Wenn infolge unterschiedlicher Fadenzugkraft des Außenfadens und Innenfadens der Kordierpunkt seine Lage verändert, werden sich gleichzeitig die beiden Garnkomponenten in einem anderen Verhältnis gegenseitig umwinden.When producing cabled technical yarns, for example tire cord, it is extremely important that the outer and inner threads have a predetermined thread tension ratio, so that the two yarn components are processed in a certain, preferably identical, length ratio. The location of the cord point in the area of the thread guide eyelet is of particular importance for this. The outer thread of the two yarn components runs through the thread balloon, while the inner thread is guided from a bobbin through a braking system into the vicinity of the apex of the thread balloon. If the cord point changes its position as a result of different thread tension of the outer thread and inner thread, the two yarn components will simultaneously wind around each other in a different ratio.

Die der Erfindung zugrunde liegende Aufgabe besteht darin, ein Verfahren der eingangs angegebenen Art so auszubilden, daß während des Vorganges - also ohne Stillsetzen des Fadenballons - ein vorgegebenes Zugkraftverhältnis eingestellt und aufrechterhalten, oder auch um einen vorgegebenen Wert verändert werden kann. Insbesondere soll erreicht werden, daß die Länge der beiden zu verarbeitenden Garnkomponenten auf einen bestimmten, vorzugsweise gleichen Wert eingestellt und auf diesem Wert gehalten werden kann.The object on which the invention is based is to develop a method of the type specified in the introduction such that a predetermined tractive force ratio can be set and maintained during the process, that is to say without stopping the thread balloon, or can also be changed by a predetermined value. In particular, it should be achieved that the length of the two yarn components to be processed can be set to a certain, preferably the same value, and kept at this value.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den Merkmalen aus dem kennzeichnenden Teil des Patentanspruchs 1.This object is achieved according to the invention with the features from the characterizing part of patent claim 1.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens sind in den Ansprüchen 2 bis 4 beschrieben.Advantageous developments of the method according to the invention are described in claims 2 to 4.

Grundsätzlich kann das erfindungsgemäße Verfahren gemäß den Merkmalen des Patentanspruchs 2 ausgeübt werden. Hierzu müssen die Einzelfaden-Zugkräfte bekannt sein. Diese können aber ohne weiteres gemessen werden, ebenso wie die Gesamtzugkraft oberhalb der Fadenführeröse. Die gemessenen Werte können in einer Auswerteeinrichtung verarbeitet und mit dem Soll-Wert verglichen werden, aus dem dann die Verstellgröße bestimmt wird.In principle, the method according to the invention can be carried out in accordance with the features of patent claim 2. For this, the single thread tensile forces must be known. However, these can be measured easily, as can the total tensile force above the thread guide eye. The measured values can be processed in an evaluation device and compared with the target value, from which the adjustment variable is then determined.

Gemäß den Patentansprüchen 3 und 4 kann aber auch das Fadenzugkraftverhältnis direkt bestimmt werden.According to claims 3 and 4, the thread tension ratio can also be determined directly.

So ist es beispielsweise besonders vorteilhaft, wenn das Verfahren die Merkmale des Patentanspruchs 4 aufweist, bei dem Gebrauch gemacht wird von einem Verfahren, bei dem die Drehungsstruktur des Garnes nach einem Vorschlag bestimmt wird, der in der älteren Patentanmeldung DE-OS 36 28 654 beschrieben ist. Es wird hierbei von der Erkenntnis ausgegangen, daß eine Längenungleichheit der Garnkomponenten, die aufgrund eines ungleichen Fadenzugkraftverhältnisses auftritt, sich bei der Bestimmung der Drehungsstruktur bemerkbar macht.For example, it is particularly advantageous if the method has the features of patent claim 4, in which use is made of a method in which the twist structure of the yarn is determined according to a proposal described in the earlier patent application DE-OS 36 28 654 is. The starting point here is the knowledge that a length unevenness of the yarn components, which occurs due to an uneven thread tension ratio, is noticeable when determining the twist structure.

Bei dem älteren Verfahren wird die Zwirnstruktur auf ihre Periodizität abgetastet. Ein Zweifachzwirn mit ungleichen Längen der beiden Garnkomponenten zeichnet sich dadurch aus, daß pro Zwirnperiode der längere Faden stärkere seitliche Ausbuchtungen zeigt als der kürzere Faden. Diese seitlichen Ausbuchtungen führen dazu, daß bei der Abtastung der Zwirnstruktur in dem Ausgangssignal der Abtastvorrichtung pro Zwirnperiode nicht zwei gleichartige Amplitudenschwankungen auftreten, sondern jeweils eine stärkere und eine schwächere Amplitude. Das Ausgangssignal enthält daher nicht nur die Grundfrequenz, die der halben Periode entspricht, sondern zusätzlich eine erste Subharmonische, die der einfachen Zwirnperiode entspricht. Die Intensität dieser Subharmonischen ist ein Maß für die Längendifferenz der Garnkomponenten, und damit auch ein Maß für den Unterschied im Fadenzugkraftverhältnis der beiden Garnkomponenten.In the older method, the twisted structure is scanned for its periodicity. A double twist with unequal lengths of the two yarn components is characterized in that the longer thread shows stronger lateral bulges per twisting period than the shorter thread. These lateral bulges mean that when the twisted structure is scanned, two identical amplitude fluctuations do not occur in the output signal of the scanning device per twisted period, but rather a stronger and a weaker amplitude. The output signal therefore contains not only the fundamental frequency, which corresponds to half the period, but also a first subharmonic, which corresponds to the simple twisting period. The intensity of this subharmonic is a measure of the length difference of the yarn components, and thus also a measure of the difference in the thread tension ratio of the two yarn components.

Wegen der Einzelheiten dieses älteren Verfahrens, insbesondere bezüglich der Auswertung des erhaltenen Signals, wird auf die ältere Anmeldung (DE-OS 36 28 654) verwiesen.Because of the details of this older method, in particular with regard to the evaluation of the signal obtained, reference is made to the earlier application (DE-OS 36 28 654).

Gegenstand der vorliegenden Erfindung ist weiterhin eine Einrichtung zur Durchführung des erfindungsgemäßen Verfahrens mit den Merkmalen des Patentanspruchs 5. Vorteilhafte Weiterbildungen der erfindungsgemäßen Einrichtung sind in den Patentansprüchen 6 bis 9 beschrieben.The present invention furthermore relates to a device for carrying out the method according to the invention with the features of patent claim 5. Advantageous developments of the device according to the invention are described in patent claims 6 to 9.

Neben der genauen Kontrolle und Einstellung der Fadenzugkraft während des Betriebes, erlaubt die erfindungsgemäße Einrichtung wegen der axialen Verstellbarkeit der Fadenführeröse zusätzlich eine Feinjustierung der Höhe der Fadenführeröse. Dies ist vor allem bei Einrichtungen von Bedeutung, die mehrere Zwirnspulen und entsprechend mehrere Fadenführer aufweisen, wobei im allgemeinen die Fadenführer an einer gemeinsamen Vorrichtung zur Grobverstellung angeordnet sind. Unvermeidliche Toleranzen in den Abmessungen der Zwirnspindeln führen dazu, daß bei diesen Einrichtungen jede Fadenführeröse in Bezug auf ihre Zwirnspindel auf einer etwas anderen Höhe liegt. Da die Höhe der Fadenführeröse in Bezug auf die Zwirnspindel die Fadenzugkraft beeinflußt, hat dies zur Folge, daß an jeder Zwirnspindel ein etwas anderes Fadenzugkraftverhältnis zwischen Außenfaden und Innenfaden herrscht. Dieser Nachteil kann durch eine entsprechende individuelle Feinjustierung an jeder der für sich axial verstellbaren Fadenführerösen behoben werden. Es kann also vor Beginn des Zwirnvorganges jede Fadenführeröse für sich genau auf einen vorgegebenen Wert einjustiert werden und dieser Wert kann während des Zwirnvorganges nach dem erfindungsgemäßen Verfahren kontrolliert und nachgeregelt werden.In addition to the precise control and adjustment of the thread tension during operation, the device according to the invention also allows fine adjustment of the height of the thread guide eye because of the axial adjustability of the thread guide eye. This is particularly important in the case of devices which have a plurality of thread bobbins and correspondingly a plurality of thread guides, the thread guides generally being arranged on a common device for rough adjustment. Inevitable tolerances in the dimensions of the twisting spindles lead to this one directions each thread guide eyelet is at a slightly different height in relation to its thread spindle. Since the height of the thread guide eyelet in relation to the thread spindle influences the thread tension, this has the consequence that a somewhat different thread tension force relationship exists between the outer thread and the inner thread on each thread spindle. This disadvantage can be remedied by a corresponding individual fine adjustment on each of the axially adjustable thread guide eyes. Before the twisting process begins, each thread guide eyelet for itself can be precisely adjusted to a predetermined value and this value can be checked and readjusted during the twisting process using the method according to the invention.

Im folgenden werden anhand der beigefügten Zeichnungen das erfindungsgemäße Verfahren sowie eine Einrichtung zur Durchführung des Verfahrens näher erläutert.The method according to the invention and a device for carrying out the method are explained in more detail below with reference to the accompanying drawings.

In den Zeichnungen zeigen:

  • Fig. 1 in einer stark schematisierten Darstellung wesentliche Teile einer Einrichtung zur Herstellung von direkt kablierten technischen Garnen;
  • Fig. 2 in gegenüber Fig. 1 vergrößerter Darstellung den Bereich der Fadenführeröse der Einrichtung nach Fig. 1;
  • Fig. 3 in schematisierter, teilweise perspektivischer Darstellung ein an die Einrichtung nach Fig. 1 und 2 angesetztes Handgerät mit einer Einrichtung zur Messung und Einstellung des Fadenzugkraftverhältnisses zwischen Außen-und Innenfaden;
  • Fig. 4 in einer teilweise als Schaltbild ausgeführten Darstellung die Einzelvorrichtungen des Handgerätes nach Fig. 3.
The drawings show:
  • Figure 1 in a highly schematic representation of essential parts of a device for the production of directly cabled technical yarns.
  • FIG. 2 shows the area of the thread guide eyelet of the device according to FIG. 1 in an enlarged representation compared to FIG. 1;
  • 3 shows a schematic, partially perspective illustration of a hand-held device attached to the device according to FIGS. 1 and 2, with a device for measuring and adjusting the thread tension ratio between the outer and inner threads;
  • FIG. 4 shows the individual devices of the hand-held device according to FIG. 3 in a representation partially implemented as a circuit diagram.

In Fig. 1 sind nur die Teile einer Einrichtung zur Herstellung von direkt kablierten technischen Garnen dargestellt, die für das Verfahren zur Einstellung des Fadenzugkraftverhältnisses zwischen Außenfaden Fa und Innenfaden Fi von Bedeutung sind. Der Außenfaden Fa wird von einer ersten Vorratsspule 1 abgezogen. Er läuft durch eine angedeutete Fadenbremsvorrichtung 2, sowie einen axialen Kanal 3.1, einer Spindel 3, aus der er durch einen radialen Kanal 3.2 austritt und um die Spindel 3 einen Fadenballon B bildet. Ein wenig über dem Scheitelpunkt des Fadenballons B ist die Fadenführeröse 6 angeordnet. Kurz unterhalb der Fadenführeröse 6 wird am Kordierpunkt K der Innenfaden Fi zugeführt, der von einer zweiten Vorratsspule 4 abgezogen wird, die oberhalb der Spindel 3 im Inneren des Fadenballons B innerhalb eines Spulentopfes 3.3 angeordnet ist. Der Innenfaden Fi läuft durch eine Fadenbremsvorrichtung 5 und tritt axial am oberen Ende des Spulentopfes 3.3 aus. Am Kordierungspunkt K umschlingen sich Außenfaden Fa und Innenfaden Fi. Die Verhältnisse im Bereich der Fadenführeröse 6 und des Kordierpunktes K sind in Fig. 2 näher dargestellt.In Fig. 1 only the parts of a device for the production of directly cabled technical yarns are shown, which are important for the method for adjusting the thread tension ratio between outer thread Fa and inner thread Fi. The outer thread Fa is drawn off from a first supply spool 1. It runs through an indicated thread brake device 2 and an axial channel 3.1, a spindle 3, from which it emerges through a radial channel 3.2 and forms a thread balloon B around the spindle 3. The thread guide eyelet 6 is arranged a little above the apex of the thread balloon B. Shortly below the thread guide eyelet 6, the inner thread Fi is fed at the Kordierpunkt K, which is drawn off from a second supply spool 4, which is arranged above the spindle 3 inside the thread balloon B within a bobbin 3.3. The inner thread Fi runs through a thread braking device 5 and exits axially at the upper end of the bobbin 3.3. The outer thread Fa and the inner thread Fi are wrapped around one another at the cordage point K. The relationships in the area of the thread guide eyelet 6 and the cord point K are shown in more detail in FIG. 2.

Wie aus Fig. 2 ersichtlich, wird am Scheitelpunkt des Fadenballons B das aus Außenfaden Fa und Innenfaden Fi gezwirnte Garn Z durch die Fadenführeröse 6 geführt. Das eigentliche Ösenteil 6.1 ist topfartig ausgebildet mit einer Durchtrittsöffnung am Boden und ist an seiner Seitenfläche in einer Führung 6.2 in axialer Richtung A verschiebbar geführt. Die Führung 6.2 befindet sich an einer Halterung 6.3, an der ein Zahnrad 6.4 angeordnet ist, das in eine an der Außenseite des Ösenteils 6.1 angeordnete Zahnstange 6.5 eingreift. Bei der Drehung des Zahnrades 6.4 verschiebt sich somit das Ösenteil 6.1 in axialer Richtung A.As can be seen from FIG. 2, the yarn Z twisted from outer thread Fa and inner thread Fi is guided through the thread guide eyelet 6 at the apex of the thread balloon B. The actual eyelet part 6.1 is pot-shaped with a passage opening on the bottom and is guided on its side surface in a guide 6.2 displaceable in the axial direction A. The guide 6.2 is located on a holder 6.3, on which a toothed wheel 6.4 is arranged, which engages in a toothed rack 6.5 arranged on the outside of the eyelet part 6.1. When the gear 6.4 rotates, the eyelet part 6.1 thus shifts in the axial direction A.

Wie weiterhin aus Fig. 2 ersichtlich, sind Außenfaden Fa und Innenfaden Fi am Kordierpunkt K zusammengeführt, wobei das Fadenzugkraftverhältnis der beiden Komponenten ihre filamentäre Feinstruktur und die produzierte Drehungsdichte den Winkel α zwischen Außenfaden Fa und Innenfaden Fi, sowie die Ballonform des Außenfadens den Winkel β bestimmen. Die Richtung des kablierten Zwirnfadens teilt den Fadenvereinigungswinkel a in die beiden Teilwinkel a 1 und a 2. Das Verhältnis dieser beiden Teilwinkel hängt nur vom Fadenzugkraftverhältnis ab. Das Fadenzugkraftverhältnis zwischen Außenfaden Fa und Innenfaden Fi kann also bei der Anordnung nach Fig. 2 beispielsweise dadurch bestimmt werden, daß kurz unterhalb der Fadenführeröse 6 die Winkel α 1 und a 2 automatisch gemessen und aus dem erhaltenen Meßwert ein das Fadenzugkraftverhältnis repräsentierendes Signal erzeugt wird. Dieses Signal kann dann mit einem Soll-Wert verglichen werden und es kann ein Steuersignal erzeugt werden, das einer nicht eigens dargestellten Verstellvorrichtung, beispielsweise einem Verstellmotor zugeführt wird, der am Zahnrad 6.4 angreift und eine entsprechende axiale Verstellung des Ösenteils 6.1 bewirkt.As can further be seen from FIG. 2, outer thread Fa and inner thread Fi are brought together at the cord point K, the thread tension ratio of the two components having their filamentary fine structure and the twist density produced the angle α between outer thread Fa and inner thread Fi, and the balloon shape of the outer thread the angle β determine. The direction of the cabled thread divides the thread joining angle a into the two partial angles a 1 and a 2. The ratio of these two partial angles only depends on the thread tension ratio. The thread tension ratio between outer thread Fa and inner thread Fi can thus be determined in the arrangement according to FIG. 2, for example, in that the angles α 1 and a 2 are measured automatically just below the thread guide eye 6 and a signal representing the thread tension ratio is generated from the measured value obtained. This signal can then be compared with a target value and a control signal can be generated which is fed to an adjusting device (not shown), for example an adjusting motor, which acts on the gearwheel 6.4 and effects a corresponding axial adjustment of the eyelet part 6.1.

Eine andere Möglichkeit, das Fadenzugkraftverhältnis zwischen Außenfaden Fa und Innenfaden Fi zu bestimmen, besteht darin, daß die Drehungsstruktur des aus den beiden Einzelkomponenten erzeugten Garnes Z, beispielsweise kurz oberhalb der Fadenführeröse 6 abgetastet wird.Another possibility of determining the thread tension ratio between the outer thread Fa and the inner thread Fi is that the rotation structure of the yarn Z produced from the two individual components is scanned, for example, just above the thread guide eyelet 6.

Wie bereits erwähnt, wird diese Drehungsstruktur von der Fadenzugkraft derart beeinflußt, daß bei ihrer Abtastung ein periodisches Signal erhalten wird, das eine Komponente enthält, welche die der Wellenlänge der Garnperiode entsprechende halbe Grundfrequenz aufweist und deren relative Intensität ein Maß für die Längendifferenz der beiden Garnkomponenten und damit auch für den unterschiedlichen Zugkraftzustand der beiden Garnkomponenten darstellt. Aus dieser Komponente kann also ein das Fadenzugkraftverhältnis repräsentierendes Signal erzeugt werden, das wiederum mit einem Soll-Wert verglichen werden kann. Aus dem Vergleich kann ein Steuersignal erzeugt werden, welches einer am Zahnrad 6.4 angreifenden Verstellvorrichtung zugeführt wird, wodurch eine entsprechende axiale Verschiebung des Ösenteils 6.1 bewirkt wird.As already mentioned, this twist structure is influenced by the thread tension in such a way that when it is scanned, a periodic signal is obtained which contains a component which has half the fundamental frequency corresponding to the wavelength of the yarn period and whose relative intensity is a measure of the length difference of the two yarn components and thus also for the different tensile force status of the two yarn components. From this component, the thread tension ratio can be represented be generated signal, which in turn can be compared with a target value. A control signal can be generated from the comparison, which is fed to an adjusting device acting on the gearwheel 6.4, whereby a corresponding axial displacement of the eyelet part 6.1 is brought about.

Im folgenden wird eine Einrichtung der letztgenannten Art und ihre Funktionsweise anhand der Figuren 3 und 4 näher erläutert.A device of the latter type and its mode of operation will be explained in more detail below with reference to FIGS. 3 and 4.

In Fig. 3 ist eine als Handgerät ausgebildete Einrichtung 7 dargestellt, die an die Vorrichtung zur Herstellung von direkt kablierten Garnen nach Fig. 1 und 2 im Bereich der Fadenführeröse 6 ansetzbar ist. Die mit einem Handgriff 7.1 versehene Einrichtung 7 besitzt an ihrer Vorderseite einen Sensorkopf 7.2 mit einem darunter angeordneten Stellkopf 7.3. Im Sensorkopf 7.2 befindet sich die ein elektrisches Ausgangssignal abgebende Abtastvorrichtung 7.21. Diese Abtastvorrichtung kann beispielsweise ein mechanisches auf Änderungen der lokalen Querdimensionen des Garns reagierendes Abtastorgan aufweisen. Die Abtastvorrichtung kann aber auch ein optisches auf Änderungen der lokalen Querstruktur des Garns reagierendes Abtastorgan aufweisen. Derartige Abtastvorrichtungen sind in DE-OS 36 28 654 näher beschrieben.FIG. 3 shows a device 7 designed as a hand-held device, which can be attached to the device for producing directly cabled yarns according to FIGS. 1 and 2 in the area of the thread guide eyelet 6. The device 7 provided with a handle 7.1 has on its front side a sensor head 7.2 with an adjusting head 7.3 arranged underneath. The scanning device 7.21, which emits an electrical output signal, is located in the sensor head 7.2. This scanning device can have, for example, a mechanical scanning element which reacts to changes in the local transverse dimensions of the yarn. However, the scanning device can also have an optical scanning element which reacts to changes in the local transverse structure of the yarn. Such scanning devices are described in more detail in DE-OS 36 28 654.

Innerhalb des Stellkopfes 7.3 ist ein Stellmotor 7.31 angeordnet, dessen Abtriebswelle 7.32 an der Außenseite des Stellkopfes 7.3 herausgeführt ist und eine als Koppelglied wirkende Schneckenwelle 7.33 aufweist. Wie in Fig. 3 und 4 zu entnehmen, wird die Einrichtung 7 so angesetzt, daß der Stellkopf 7.3 sich auf der Höhe der Fadenführeröse 6 befindet und die Schneckenwelle 7.33 in das Zahnrad 6.4 eingreift. Der Sensorkopf 7.2 befindet sich dann an einer Stelle oberhalb der Fadenführeröse 6, gegenüber der Bewegungsbahn des Garns Z. Das von der Abtastvorrichtung 7.21 abgegebene elektrische Signal wird über einen Verstärker 7.22 einer Auswertevorrichtung 7.5 zugeführt. In diese Auswertevorrichtung 5 wird das Signal auf periodische Komponenten untersucht und analysiert. Dabei wird in nicht eigens dargestellter Weise aus der Komponente, die der ersten Subharmonischen des periodischen Eingangssignals entspricht, ein die Längendifferenz der beiden Garnkomponenten repräsentierendes Signal erzeugt, das mit einem am Eingang vorgebbaren Soll-Wert-Signal verglichen wird. Es wird dann ein Steuersignal erzeugt, das über einen weiteren Verstärker 7.34 zur Ansteuerung des Stellmotors 7.31 verwendet wird, der das Ösenteil 6.1 so lange verschiebt, bis an dem von der Abtastvorrichtung 7.21 gelieferten Signal durch die Auswertevorrichtung 7.5 festgestellt wird, daß der gewünschte Soll-Wert erreicht ist.A positioning motor 7.31 is arranged within the positioning head 7.3, the output shaft 7.32 of which is led out on the outside of the positioning head 7.3 and has a worm shaft 7.33 acting as a coupling member. As can be seen in FIGS. 3 and 4, the device 7 is set in such a way that the adjusting head 7.3 is at the level of the thread guide eyelet 6 and the worm shaft 7.33 engages in the gearwheel 6.4. The sensor head 7.2 is then located at a point above the thread guide eyelet 6, opposite the path of movement of the yarn Z. The electrical signal emitted by the scanning device 7.21 is fed to an evaluation device 7.5 via an amplifier 7.22. The signal for periodic components is examined and analyzed in this evaluation device 5. In this case, a signal representing the length difference of the two yarn components is generated from the component, which corresponds to the first subharmonic of the periodic input signal, which is compared with a target value signal which can be predetermined at the input. A control signal is then generated, which is used via a further amplifier 7.34 to control the servomotor 7.31, which shifts the eyelet part 6.1 until the signal supplied by the scanning device 7.21 is determined by the evaluation device 7.5 that the desired target Value is reached.

Durch eine am Handgerät 7 angeordnete Anzeigevorrichtung 7.4, die beispielsweise als Bildschirm ausgebildet sein kann, kann das Ist-Signal direkt angezeigt werden.The actual signal can be displayed directly by means of a display device 7.4 arranged on the hand-held device 7, which can be designed, for example, as a screen.

Claims (10)

1. A method of adjusting the ratio of the thread tensile force between outer and inner thread upon the production of cabled industrial yarns by means of a mechanism in which an outer and an inner thread are brought together in the region of a thread balloon for mutual looping and the yarn is then conducted through a thread guide eyelet, characterised in that the ratio of the thread tensile force is determined immediately in front of or behind the thread guide eyelet (6), the actual value obtained is compared with a desired value and the thread guide eyelet (6) which is adjustable in the axial direction is automatically adjusted until the actual value obtained corresponds with the desired value.
2. A method according to claim 1, characterised in that the ratio of the thread tensile force is determined from the absolute magnitudes of the thread tensile forces.
3. A method according to claim 1, characterised in that the ratio of the thread tensile force is determined by the thread union angle or respectively symmetry of the angle in the thread balloon being measured for at least one of the threads and a signal representing the ratio of the thread tensile force being generated from the measured value.
4. A method according to claim 1, characterised in that the ratio of the tread tensile force is determined by the difference in length between the two yarn components being determined immediately behind the thread guide eyelet (6), in accordance with a method in which the twisting structure of the yarn is determined, by the yarn (z) being moved in its longitudinal direction at a constant speed past a sensing device (7.21) which reacts to changes in the yarn structure in the longitudinal direction and generates a signal, the temporal course of which represents a function of the sensed changes in structure, this signal being analysed and investigated for periodic components, in which respect upon the occurrence of several components of different frequency from the relative intensity of the component having the half fundamental frequency corresponding to the wave length of the yarn period a control signal is derived which represents the difference in length between the two yarn components and this control signal is compared as actual value with a corresponding desired value and the appropriate adjustment of the thread guide eyelet (6) is carried out.
5. A mechanism for carrying out the method according to one of claims 1 to 4 on a device for producing directly cabled industrial yarns having a thread guide eyelet (6) which is arranged behind the point (K) at which outer and inner thread (Fa, Fi) are brought together, characterised in that the thread guide eyelet (6) is designed so as to be adjustable in the axial direction (A) and a device (7.2 - 7.5), installable permanently or temporarily in the region of the thread guide eyelet (6), for measuring the ratio of the thread tensile force between outer and inner thread is provided which has devices (7. 5) for comparing an actual value with a desired value and for generating an adjusting signal as a function of the difference between actual value and desired value and a device (7.3) for adjusting the thread guide eyelet (6).
6. A mechanism according to claim 5, characterised in that the adjustable thread guide eyelet (6.1) is guided so as to be displaceable in the axial direction (A) in a holder (6.2), and has on its outer jacket a rack (6.5) which engages into a toothed wheel (6.4), in which respect the toothed wheel meshes or can be brought into mesh with a worm shaft (7.33) which is ar: ranged on the driving shaft (7.32) of a servo motor (7.31).
7. A mechanism according to claim 5 or 6 for carrying out the method according to claim 3, characterised in that the device (7.2 - 7.5) for measuring the ratio of the thread tensile force between outer and inner thread has a sensing device (7.21) which is arranged at a fixed point behind the thread guide eyelet (6) relative to the path of motion of the yarn (Z) and which delivers an electrical output signal and which is connected to an electronic evaluation device (7.5) which generates the control signal representing the difference in length between the two yarn components and processes it into the adjusting signal that is to be supplied to the device (7.3) for adjusting the thread guide eyelet (6).
8. A mechanism according to one of claims 5 to 7, characterised in that the device (7.2 - 7.5) for measuring the ratio of the thread tensile force between outer and inner thread has a display device (7.4) for displaying the measured actual value and/or the difference between the actual value and the desired value.
9. A mechanism according to claim 7 or 8, characterised in that the device for measuring the ratio of the thread tensile force between outer and inner thread is designed as a hand-operated instrument (7) which can be affixed to the device for producing cabled industrial yams in the region of the thread guide eylet (6) in such a way that a sensor head (7.2) containing the sensing device lies relative to the path of motion of the yarn (Z) behind the thread guide eyelet (6), whilst an adjusting head (7.3) which contains a coupling member (7.33) which is connected to the driven shaft (7.32) of a servo motor (7.31) arranged in the hand-operated instrument (7) is affixed in such a way to the device for adjusting the thread guide eyelet (6) than the coupling member (7.33) is connected to the device for adjusting the thread guide eyelet (6).
EP88101506A 1987-03-14 1988-02-03 Method for adjusting the proportion of yarn tension between outer and inner yarn during the production of industrial cabled yarns, and apparatus for carrying out this method Expired - Lifetime EP0282713B1 (en)

Applications Claiming Priority (2)

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DE3708331A DE3708331C1 (en) 1987-03-14 1987-03-14 Process for setting the thread tension ratio between the outer and inner thread in the production of cabled technical yarns and device for carrying out the process
DE3708331 1987-03-14

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EP0282713A1 EP0282713A1 (en) 1988-09-21
EP0282713B1 true EP0282713B1 (en) 1991-04-24

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US4848075A (en) 1989-07-18
EP0282713A1 (en) 1988-09-21
JPS63243340A (en) 1988-10-11
JP2592485B2 (en) 1997-03-19
DE3708331C1 (en) 1988-07-14

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