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EP1100741B1 - Method and device for cutting yarn on a textile machine - Google Patents

Method and device for cutting yarn on a textile machine Download PDF

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Publication number
EP1100741B1
EP1100741B1 EP99928989A EP99928989A EP1100741B1 EP 1100741 B1 EP1100741 B1 EP 1100741B1 EP 99928989 A EP99928989 A EP 99928989A EP 99928989 A EP99928989 A EP 99928989A EP 1100741 B1 EP1100741 B1 EP 1100741B1
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EP
European Patent Office
Prior art keywords
yarn
kinetic energy
blade
cutting
knife
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
EP99928989A
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German (de)
French (fr)
Other versions
EP1100741A1 (en
Inventor
Cyrill Bucher
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.)
Uster Technologies AG
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Zellweger Luwa AG
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Publication date
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Publication of EP1100741A1 publication Critical patent/EP1100741A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00Winding, coiling, or depositing filamentary material
    • B65H54/70Other constructional features of yarn-winding machines
    • B65H54/71Arrangements for severing filamentary materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06Warning 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
    • B65H63/062Electronic slub detector
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16Rectilinearly-movable armatures
    • H01F7/1607Armatures entering the winding
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1805Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1816Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator

Definitions

  • the invention relates to a method and an apparatus for cutting yarn on a Textile machine, with a knife, the knife being driven by kinetic energy is supplied (see DE-A-2 132 137).
  • Such devices are particularly on textile machines, such as on winding machines arranged. There they are for cutting out errors, such as B. Dickoder Thin spots in the yarn, provided.
  • the cutting is done with a movable stored knife that pushes the yarn against a backing and when it is on it rests, severed. To do this, the knife should absorb enough kinetic energy before it hits the yarn. It is common to accelerate the knife so much that with its kinetic energy it can quickly cut through all conceivable yarns. excess Energy is destroyed on the counterhold. Or, the knife receives the according given the current available energy. Then the knife supplied energy fluctuate arbitrarily.
  • a disadvantage of such known devices is that the cutting force of the Knife is designed for the thickest yarn that is expected to be processed by the device could be, or that quite simply the drive always its full or the delivers the currently available service. This practically results in the knife is worn too strongly or too quickly and that the whole device itself is unnecessary experiences strong shocks.
  • This group includes properties of the material from which the gam is made, diameter, cross-section, mass of the yarn, etc., as well as properties of the device used for cutting.
  • One such property is, for example, the inertia of the masses moved with the knife and the knife itself, the characteristic of the frictional resistance of the moving Knife etc.
  • a property such as the diameter or the cross section of the chamois immediately before the cut i.e. continuously measured and the The measured value is taken into account when dimensioning the supplied energy. Therefore the drive has a device for measuring the kinetic energy of the knife.
  • Fig. 1 shows the most important parts of the device, in particular a carrier 1, a moving coil 2 with the coil 3 and the plunger 4, which is a drive for a knife holder 5 and thus also form for a knife 6 and a counterhold or anvil 7, the part of the carrier 1.
  • the anvil 7 has a hardened surface 8, in front of which a yarn 9, for example is moved past in the direction of an arrow 10. Parts can be seen on carrier 1 of two screw connections 11 and 12, via which the device on a textile machine can be attached.
  • the knife 6 is preferably fixed to the knife holder 5 connected, which in turn here with a releasable positive connection 13
  • Submersible anchor 4 is connected. It is known per se and therefore not shown here that the coil has 3 turns that are not shown in this figure Control circuit 14 are connected.
  • Fig. 2 shows a control circuit 14 as a device for measuring the kinetic energy of the knife 6, which is connected via a line 15 to a cutting device 16.
  • the Cutting device 16 is preferably constructed as shown in FIG. 1.
  • the administration 15 is connected via a line 19 and a switching element 17 to an energy store 18, formed here as a capacitor, connected to a voltage converter 20 connected. This in turn is via a line 21 and a further switching element 22 connected to a feed circuit 23.
  • the switching elements 22 and 17 are Connected via lines 24 and 25 to a controller 26, which also has two inputs 27 and has 28.
  • the input 27 is connected to the line 19 and the input 28 is either connected to a gamma meter 29 or a data input 30.
  • the voltage converter 20 can be used, for example, as a DC converter or as a charge pump be trained.
  • the controller 26 a corresponding to the Programmed microprocessor described below uses.
  • the feed circuit 23, which is part of a textile machine, for example, supplies a feed voltage from e.g. 30V - 60V to line 21 and switching element 22. In closed State is thus fed the voltage converter 20, which is the applied Converts voltage, i.e. increases or limits and via line 19 the capacitor 18 charges
  • a signal is present at the controller 26, which is a property of the yarn and / or the device (inertia, friction, etc.).
  • the chamois can depend on the quality of the material or it can depend on the quantity of the material. Properties belong to the first group such as tensile strength, modulus of elasticity, internal damping, the energy absorption capacity, or just the properties of the raw material used and the processing chosen, etc.
  • the controller 26 determines whether the switching element 22 is opened must, because the capacitor 18, for example, the existing cross section and material of the yarn is sufficiently charged.
  • the switching element 17 is closed when a cut needs to be made by the controller 26 or one other element is triggered. Then the coil 3 by the voltage in the Line 15 is excited so that the plunger 4 moves towards the anvil 7 in FIG. 1 and the knife 6 pushes the yarn 9 against the surface 8 and separates it there.
  • the switching element 17 is passed over line 25 after a time sufficient for one cut, e.g. after 10 Milliseconds, opened again.
  • the switching element 22 is then switched on again via the line 24 closed until the capacitor 18 has the desired charging voltage again.
  • the charging voltage is adjusted if it is proportional to the resistance that the Oppose the cut by the knife. This resistance is great if that Yarn has a large cross-section, i.e. many and / or thick or tough fibers, has, or small if the yarn has a small cross-section, i.e. few and / or thin or soft Has fibers.
  • a suitable input via the data input 30 can also other factors dependent on the material used are taken into account. For example the tensile strength or hairiness of the yarn previously measured in the laboratory, or any other property that affects the force required for a cut. In this way, the kinetic energy can be supplied to the knife in doses and depending on it the cross-section or other properties of the yarn.
  • the cross section is measured before cutting, for example, and the measurement value obtained in this way used to measure the kinetic energy by the controller 26.
  • the kinetic energy is thus previously used as an electrical voltage, for example in the capacitor 18 saved.
  • the electrical voltage can not only cross section of the yarn but also the mass of the knife 6 and other moving parts 4, 5 or other properties of the drive.
  • the device can also be designed such that the function of the switching element 22 is perceived in the voltage converter 20. In this case, the switching element 20 falls away and the line 24 connects the controller 26 directly to the voltage converter 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Coiling Of Filamentary Materials In General (AREA)

Abstract

The invention relates to a method and a device for cutting yarn (9) on a textile machine, comprising a blade (6) which is supplied with kinetic energy via a drive (2, 3, 4). To be able to generate at all times a sufficient yet not excessive cutting power the kinetic energy is delivered in doses and rated in accordance with properties of the yarn and/or device. The drive thus comprises a device (14) for rating the kinetic energy of the blade.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Schneiden von Garn auf einer Textilmaschine, mit einem Messer, wobei dem Messer über einen Antrieb Bewegungsenergie zugeführt wird (siehe DE-A-2 132 137).The invention relates to a method and an apparatus for cutting yarn on a Textile machine, with a knife, the knife being driven by kinetic energy is supplied (see DE-A-2 132 137).

Solche Vorrichtungen sind insbesondere auf Textilmaschinen, wie beispielsweise auf Spulmaschinen angeordnet. Dort sind sie zum Herausschneiden von Fehlern, wie z. B. Dickoder Dünnstellen im Garn, vorgesehen. Das Schneiden erfolgt dabei mit einem beweglich gelagerten Messer, das das Garn gegen eine Gegenhaltung drängt und, wenn es darauf aufliegt, durchtrennt. Dazu soll das Messer genügend Bewegungsenergie aufnehmen, bevor es auf das Garn trifft. Es ist dabei üblich, das Messer so stark zu beschleunigen, dass es mit seiner kinetischen Energie alle denkbaren Garne rasch durchtrennen kann. Überschüssige Energie wird auf der Gegenhaltung vernichtet. Oder, das Messer erhält die gemäss den gegebenen Umständen gerade verfügbare Energie. Dann kann die dem Messer zugeführte Energie willkürlich schwanken.Such devices are particularly on textile machines, such as on winding machines arranged. There they are for cutting out errors, such as B. Dickoder Thin spots in the yarn, provided. The cutting is done with a movable stored knife that pushes the yarn against a backing and when it is on it rests, severed. To do this, the knife should absorb enough kinetic energy before it hits the yarn. It is common to accelerate the knife so much that with its kinetic energy it can quickly cut through all conceivable yarns. excess Energy is destroyed on the counterhold. Or, the knife receives the according given the current available energy. Then the knife supplied energy fluctuate arbitrarily.

Bei bekannten Vorrichtungen, werden für den Antrieb sogenannte Tauch- oder Klappanker verwendet, wobei das Messer mit dem Anker verbunden ist.In known devices, so-called submersible or folding anchors are used for the drive used, the knife being connected to the anchor.

Ein Nachteil solcher bekannter Vorrichtungen ist darin zu sehen, dass die Schneidkraft des Messers auf die dicksten Garne ausgelegt ist, die voraussichtlich durch die Vorrichtung bearbeitet werden könnten, oder, dass ganz einfach der Antrieb immer seine volle oder die gerade zur Verfügung stehende Leistung abgibt. Dies führt praktisch dazu, dass das Messer zu stark oder zu schnell abgenützt wird und dass die ganze Vorrichtung an sich unnötig starke Erschütterungen erfährt.A disadvantage of such known devices is that the cutting force of the Knife is designed for the thickest yarn that is expected to be processed by the device could be, or that quite simply the drive always its full or the delivers the currently available service. This practically results in the knife is worn too strongly or too quickly and that the whole device itself is unnecessary experiences strong shocks.

Es ist deshalb eine Aufgabe der Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, ein Verfahren und eine Vorrichtung zu schaffen, die diese Nachteile vermeidet, und die immer eine genügende Schneidkraft erzeugt.It is therefore an object of the invention as characterized in the claims to provide a method and a device which avoids these disadvantages and which always generates a sufficient cutting force.

Dies wird dadurch erreicht, dass die Bewegungsenergie dosiert zugeführt wird und in Abhängigkeit einer Eigenschaft aus einer Gruppe bemessen wird. Diese Gruppe umfasst Eigenschaften des Materials aus dem das Gam besteht, Durchmesser, Querschnitt, Masse des Garns usw., sowie Eigenschaften der Vorrichtung, die zum Schneiden verwendet wird. This is achieved in that the kinetic energy is supplied in a dosed and dependent manner a property from a group is measured. This group includes properties of the material from which the gam is made, diameter, cross-section, mass of the yarn, etc., as well as properties of the device used for cutting.

Eine solche Eigenschaft ist beispielsweise die Trägheit der mit dem Messer bewegten Massen und des Messers an sich, die Charakteristik des Reibungswiderstandes des bewegten Messers usw. Vorzugsweise wird eine Eigenschaft wie beispielsweise der Durchmesser oder der Querschnitt des Gams unmittelbar vor dem Schnitt d.h. laufend gemessen und der gemessene Wert wird bei der Bemessung der zugeführten Energie berücksichtigt. Deshalb weist der Antrieb eine Vorrichtung zur Bemessung der Bewegungsenergie des Messers auf.One such property is, for example, the inertia of the masses moved with the knife and the knife itself, the characteristic of the frictional resistance of the moving Knife etc. Preferably a property such as the diameter or the cross section of the chamois immediately before the cut i.e. continuously measured and the The measured value is taken into account when dimensioning the supplied energy. Therefore the drive has a device for measuring the kinetic energy of the knife.

Die dadurch erreichten Vorteile sind insbesondere darin zu sehen, dass das Messer, die Gegenhaltung oder der Amboss und überhaupt die ganze Vorrichtung mit der Aufhängung geschont wird. Femer werden unerwünschte Nebeneffekte vermieden, wie beispielsweise das starke Zurückfedern des Messers, das mit zuviel überschüssiger Energie auf der Gegenhaltung aufprallt. Da die Bemessung der Bewegungsenergie eine Beschränkung sowie auch eine Erhöhung der am Antrieb angelegten Spannung bewirken kann, kann auch dann ein einwandfreier Schnitt des Gams durchgeführt werden, wenn die Textilmaschine eine an sich ungenügende Spannung an die Vorrichtung liefert.The advantages achieved by this can be seen in particular in the fact that the knife Brace or the anvil and the whole device with the suspension is spared. Unwanted side effects are also avoided, such as the strong springback of the knife, that with too much excess energy on the counterhold impacts. Because the measurement of kinetic energy is a limitation as well can also cause an increase in the voltage applied to the drive A perfect cut of the chamois can be done when the textile machine is one insufficient voltage is supplied to the device.

Im folgenden wird die Erfindung anhand eines Beispiels und mit Bezug auf die vorliegenden Zeichnungen näher erläutert. Es zeigen:

  • Figur 1 einen Teil der erfindungsgemässen Vorrichtung in perspektivischer Darstellung und
  • Figur 2 ein Blockschema eines weiteren Teils der Vorrichtung.
  • The invention is explained in more detail below using an example and with reference to the present drawings. Show it:
  • Figure 1 shows a part of the inventive device in perspective and
  • Figure 2 is a block diagram of another part of the device.
  • Fig. 1 zeigt die wichtigsten Teile der Vorrichtung, insbesondere einen Träger 1, eine Tauchspule 2 mit der Spule 3 und dem Tauchanker 4, die einen Antrieb für einen Messerhalter 5 und so auch für ein Messer 6 bilden und eine Gegenhaltung oder ein Amboss 7, der Teil des Trägers 1 ist. Der Amboss 7 weist eine gehärtete Fläche 8 auf, vor der ein Garn 9 beispielsweise in Richtung eines Pfeiles 10 vorbeibewegt wird. Am Träger 1 erkennt man Teile von zwei Schraubverbindungen 11 und 12, über die die Vorrichtung auf einer Textilmaschine befestigt werden kann. Das Messer 6 ist vorzugsweise fest mit dem Messerhalter 5 verbunden, der seinerseits hier über eine lösbare formschlüssige Verbindung 13 mit dem Tauchanker 4 verbunden ist. Es ist an sich bekannt, und deshalb hier nicht näher dargestellt, dass die Spule 3 Windungen ausweist, die an eine in dieser Figur nicht gezeigte Steuerschaltung 14 angeschlossen sind.Fig. 1 shows the most important parts of the device, in particular a carrier 1, a moving coil 2 with the coil 3 and the plunger 4, which is a drive for a knife holder 5 and thus also form for a knife 6 and a counterhold or anvil 7, the part of the carrier 1. The anvil 7 has a hardened surface 8, in front of which a yarn 9, for example is moved past in the direction of an arrow 10. Parts can be seen on carrier 1 of two screw connections 11 and 12, via which the device on a textile machine can be attached. The knife 6 is preferably fixed to the knife holder 5 connected, which in turn here with a releasable positive connection 13 Submersible anchor 4 is connected. It is known per se and therefore not shown here that the coil has 3 turns that are not shown in this figure Control circuit 14 are connected.

    Fig. 2 zeigt eine Steuerschaltung 14 als Vorrichtung zur Bemessung der Bewegungsenergie des Messers 6, die über eine Leitung 15 mit einer Schneidvorrichtung 16 verbunden ist. Die Schneidvorrichtung 16 ist dabei vorzugsweise wie in Fig. 1 gezeigt aufgebaut. Die Leitung 15 ist dabei über eine Leitung 19 und ein Schaltelement 17 mit einem Energiespeicher 18, hier als Kondensator ausgebildet, verbunden, der weiter an einen Spannungswandler 20 angeschlossen ist. Dieser wiederum ist über eine Leitung 21 und ein weiteres Schaltelement 22 mit einer Speiseschaltung 23 verbunden. Die Schaltelemente 22 und 17 sind über Leitungen 24 und 25 mit einer Steuerung 26 verbunden, die zudem zwei Eingänge 27 und 28 aufweist. Der Eingang 27 ist mit der Leitung 19 verbunden und der Eingang 28 ist entweder mit einem Gammessgerät 29 oder einer Dateneingabe 30 verbunden.Fig. 2 shows a control circuit 14 as a device for measuring the kinetic energy of the knife 6, which is connected via a line 15 to a cutting device 16. The Cutting device 16 is preferably constructed as shown in FIG. 1. The administration 15 is connected via a line 19 and a switching element 17 to an energy store 18, formed here as a capacitor, connected to a voltage converter 20 connected. This in turn is via a line 21 and a further switching element 22 connected to a feed circuit 23. The switching elements 22 and 17 are Connected via lines 24 and 25 to a controller 26, which also has two inputs 27 and has 28. The input 27 is connected to the line 19 and the input 28 is either connected to a gamma meter 29 or a data input 30.

    Der Spannungswandler 20 kann beispielsweise als Gleichstromwandler oder als Ladungspumpe ausgebildet sein. Für die Steuerung 26 wird vorzugsweise ein entsprechend der nachfolgend beschriebenen Wirkungsweise programmierter Mikroprozessor verwendet.The voltage converter 20 can be used, for example, as a DC converter or as a charge pump be trained. For the controller 26, a corresponding to the Programmed microprocessor described below uses.

    Die Wirkungsweise der Erfindung ist wie folgt beschrieben:The operation of the invention is described as follows:

    Die Speiseschaltung 23, welche beispielsweise Teil einer Textilmaschine ist, gibt eine Speisespannung von z.B. 30V - 60V an die Leitung 21 und das Schaltelement 22 ab. In geschlossenem Zustand wird damit der Spannungswandler 20 gespeist, der die angelegte Spannung umwandelt, d.h. erhöht oder beschränkt und über Leitung 19 den Kondensator 18 auflädt Am Eingang 28 liegt an der Steuerung 26 ein Signal an, das eine Eigenschaft des Garns und/oder der Vorrichtung (Trägheit, Reibung, usw.) angibt. Eine solche Eigenschaft des Gams kann einerseits abhängig von der Qualität des Materials sein, oder sie kann abhängig von der Quantität des Materials sein. In die erste Gruppe gehören Eigenschaften wie beispielsweise die Zugfestigkeit, das Elastizitätsmodul, die innere Dämpfung, das Energieabsorptionsvermögen, oder eben Eigenschaften die vom verwendeten Rohstoff und der gewählten Verarbeitung usw. abhängen. In die zweite Gruppe gehören Eigenschaften wie der Querschnitt, der Durchmesser oder die Masse usw. des Garns. Am Eingang 27 liegt ein Signal an, das die Ladespannung des Kondensators 18 angibt. Aus den Signalen der Eingänge 27 und 28 bestimmt die Steuerung 26 ob das Schaltelement 22 geöffnet werden muss, weil der Kondensator 18 beispielsweise dem vorhandenen Querschnitt und Material des Garns entsprechend genügend aufgeladen ist. Das Schaltelement 17 wird geschlossen, wenn ein Schnitt ausgeführt werden muss, was von der Steuerung 26 oder einem anderen Element ausgelöst wird. Dann wird die Spule 3 durch die Spannung in der Leitung 15 erregt, sodass der Tauchanker 4 sich in Fig. 1 gegen den Amboss 7 hin bewegt und das Messer 6 das Garn 9 gegen die Fläche 8 drängt und dort trennt. Das Schaltelement 17 wird über die Leitung 25 nach einer Zeit, die für einen Schnitt genügt, z.B. nach 10 Millisekunden, wieder geöffnet Danach wird das Schaltelement 22 über die Leitung 24 wieder geschlossen, bis der Kondensator 18 wieder die gewünschte Ladespannung aufweist. The feed circuit 23, which is part of a textile machine, for example, supplies a feed voltage from e.g. 30V - 60V to line 21 and switching element 22. In closed State is thus fed the voltage converter 20, which is the applied Converts voltage, i.e. increases or limits and via line 19 the capacitor 18 charges At the input 28, a signal is present at the controller 26, which is a property of the yarn and / or the device (inertia, friction, etc.). Such a property The chamois can depend on the quality of the material or it can depend on the quantity of the material. Properties belong to the first group such as tensile strength, modulus of elasticity, internal damping, the energy absorption capacity, or just the properties of the raw material used and the processing chosen, etc. Properties belong to the second group like the cross-section, the diameter or the mass etc. of the yarn. At entrance 27 there is a signal indicating the charging voltage of the capacitor 18. From the signals of the inputs 27 and 28, the controller 26 determines whether the switching element 22 is opened must, because the capacitor 18, for example, the existing cross section and material of the yarn is sufficiently charged. The switching element 17 is closed when a cut needs to be made by the controller 26 or one other element is triggered. Then the coil 3 by the voltage in the Line 15 is excited so that the plunger 4 moves towards the anvil 7 in FIG. 1 and the knife 6 pushes the yarn 9 against the surface 8 and separates it there. The switching element 17 is passed over line 25 after a time sufficient for one cut, e.g. after 10 Milliseconds, opened again. The switching element 22 is then switched on again via the line 24 closed until the capacitor 18 has the desired charging voltage again.

    Die Ladespannung ist dann angepasst, wenn sie proportional dem Widerstand ist, den das Garn dem Schnitt durch das Messer entgegensetzt. Dieser Widerstand ist gross, wenn das Garn einen grossen Querschnitt, d.h. viele und/oder dicke oder zähe Fasern, hat, oder klein, wenn das Garn einen kleinen Querschnitt, d.h. wenige und/oder dünne oder weiche Fasem aufweist. Durch eine geeignete Eingabe über die Dateneingabe 30 können auch weitere, vom verwendeten Material abhängige Faktoren berücksichtigt werden. Beispielsweise die im Labor vorgängig gemessene Zugfestigkeit oder Haarigkeit des Garns, oder irgendeine andere Eigenschaft, die die Kraft beeinflusst, die für einen Schnitt benötigt wird. So kann die Bewegungsenergie dem Messer dosiert zugeführt werden und in Abhängigkeit des Querschnitts oder anderer Eigenschaften des Garns bemessen werden. Der Querschnitt wird vor dem Schneiden beispielsweise gemessen und der so erhaltene Messwert zur Bemessung der Bewegungsenergie durch die Steuerung 26 verwendet. Die Bewegungsenergie wird somit vorgängig als elektrische Spannung beispielsweise im Kondensator 18 gespeichert. Die elektrische Spannung kann dabei nicht nur dem Querschnitt des Garns sondern auch der Masse des Messers 6 und weiterer bewegter Teile 4, 5 oder anderen Eigenschaften des Antriebs angepasst sein.The charging voltage is adjusted if it is proportional to the resistance that the Oppose the cut by the knife. This resistance is great if that Yarn has a large cross-section, i.e. many and / or thick or tough fibers, has, or small if the yarn has a small cross-section, i.e. few and / or thin or soft Has fibers. A suitable input via the data input 30 can also other factors dependent on the material used are taken into account. For example the tensile strength or hairiness of the yarn previously measured in the laboratory, or any other property that affects the force required for a cut. In this way, the kinetic energy can be supplied to the knife in doses and depending on it the cross-section or other properties of the yarn. The cross section is measured before cutting, for example, and the measurement value obtained in this way used to measure the kinetic energy by the controller 26. The kinetic energy is thus previously used as an electrical voltage, for example in the capacitor 18 saved. The electrical voltage can not only cross section of the yarn but also the mass of the knife 6 and other moving parts 4, 5 or other properties of the drive.

    Die Vorrichtung kann auch so ausgebildet sein, dass die Funktion des Schaltelementes 22 im Spannungswandler 20 wahrgenommen wird. In diesem Falle fällt das Schaltelement 20 weg und die Leitung 24 verbindet die Steuerung 26 direkt mit dem Spannungswandler 20.The device can also be designed such that the function of the switching element 22 is perceived in the voltage converter 20. In this case, the switching element 20 falls away and the line 24 connects the controller 26 directly to the voltage converter 20.

    Claims (8)

    1. A method for cutting yarn on a textile machine, with a blade (6), the blade being supplied with kinetic energy, characterised in that the kinetic energy is supplied in metered fashion and is measured as a function of at least one property from a group of properties, containing properties of the material from which the yarn (9) is made, the mass, diameter, cross section and the device which is used for cutting.
    2. A method according to claim 1, characterised in that a property is continuously measured directly prior to the cutting of the yarn and the measurement value obtained in this manner is used for measuring the kinetic energy.
    3. A method according to claim 1, characterised in that the kinetic energy is stored in advance as electrical voltage.
    4. A method according to claim 3, characterised in that the electrical voltage is provided proportional to the cross section of the yarn and the mass of the blade.
    5. A device for cutting yarn on a textile machine, with a blade (6) and a drive (2, 3, 4) for the blade, characterised in that the drive comprises a device (14) for measuring the kinetic energy of the blade.
    6. A device according to claim 5, characterised in that the device for measuring the kinetic energy comprises a control circuit (26) and an energy store (18), the control circuit metering the stored energy.
    7. A device according to claim 5, characterised in that a capacitor is provided as an energy store.
    8. A device according to claim 5, characterised in that a microprocessor programmed in a suitable manner is provided as a control circuit.
    EP99928989A 1998-07-24 1999-07-19 Method and device for cutting yarn on a textile machine Expired - Lifetime EP1100741B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    CH156198 1998-07-24
    CH156198 1998-07-24
    PCT/CH1999/000329 WO2000006479A1 (en) 1998-07-24 1999-07-19 Method and device for cutting yarn on a textile machine

    Publications (2)

    Publication Number Publication Date
    EP1100741A1 EP1100741A1 (en) 2001-05-23
    EP1100741B1 true EP1100741B1 (en) 2003-03-19

    Family

    ID=4213302

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99928989A Expired - Lifetime EP1100741B1 (en) 1998-07-24 1999-07-19 Method and device for cutting yarn on a textile machine

    Country Status (6)

    Country Link
    US (1) US6381941B1 (en)
    EP (1) EP1100741B1 (en)
    JP (1) JP2002521294A (en)
    CN (1) CN1211269C (en)
    DE (1) DE59904646D1 (en)
    WO (1) WO2000006479A1 (en)

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CH699425B1 (en) * 2007-06-14 2010-03-15 Uster Technologies Ag Device for cutting yarn in yarn cleaner that monitors and ensures quality of yarn in spinning and/or winding machine in textile industry, has gap formed such that magnetic field acting radially on solenoid plunger of drive is cancelled
    WO2009018670A1 (en) * 2007-08-07 2009-02-12 Uster Technologies Ag Device for cutting a thread-shaped body
    CH699753A1 (en) * 2008-10-16 2010-04-30 Uster Technologies Ag DEVICE AND METHOD FOR A CAPACITY measure.
    IT1402740B1 (en) * 2010-10-19 2013-09-18 Btsr Int Spa CUTTING DEVICE FOR A TEXTILE WIRE DURING ITS POWER TO AN OPERATOR ELEMENT

    Family Cites Families (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2132137A1 (en) * 1971-06-29 1973-01-18 R & M Leuze Fa Filament quality monitor - with photoelectric pickup , fet and operational amplifier as comparator
    CH538418A (en) * 1971-11-26 1973-06-30 Zellweger Uster Ag Cutting device for yarn clearers
    FR2217441B1 (en) * 1973-02-08 1975-03-07 Rhone Poulenc Textile
    GB1600164A (en) * 1978-05-25 1981-10-14 Thorn Automation Ltd Yarn clearer assemblies
    CH649270A5 (en) * 1981-02-11 1985-05-15 Peyer Siegfried METHOD OF CUT CONTROL FOR ELECTRONIC YARN CLEARERS.
    GB2193978A (en) * 1986-07-17 1988-02-24 Brierley John L Ltd Yarn clearers
    DE3644433C2 (en) * 1986-12-24 1995-10-19 Schlafhorst & Co W Method and device for controlling a winding station of a textile machine producing cross-wound bobbins
    JPH0314711U (en) * 1989-06-23 1991-02-14
    DE4310037C1 (en) 1993-03-27 1993-12-09 Beermann Kg Martor Argentax Knife with automatically retractable blade - has capacitive acceleration sensor in hollow handle coupled to electromagnetic lock for unlatching spring returned blade when translatory or angular acceleration exceeds threshold.
    JPH1018131A (en) * 1996-06-27 1998-01-20 Murata Mach Ltd Yarn cutter

    Also Published As

    Publication number Publication date
    CN1211269C (en) 2005-07-20
    DE59904646D1 (en) 2003-04-24
    US6381941B1 (en) 2002-05-07
    WO2000006479A1 (en) 2000-02-10
    CN1311751A (en) 2001-09-05
    JP2002521294A (en) 2002-07-16
    EP1100741A1 (en) 2001-05-23

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