EP2767625B1 - Spinning unit of a spinning machine - Google Patents

Spinning unit of a spinning machine Download PDF

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Publication number
EP2767625B1
EP2767625B1 EP14154817.2A EP14154817A EP2767625B1 EP 2767625 B1 EP2767625 B1 EP 2767625B1 EP 14154817 A EP14154817 A EP 14154817A EP 2767625 B1 EP2767625 B1 EP 2767625B1
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EP
European Patent Office
Prior art keywords
compressed air
spinning
additive
yarn
metering
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Not-in-force
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EP14154817.2A
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German (de)
French (fr)
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EP2767625A1 (en
Inventor
Götz Theodor Gresser
Andreas Fischer
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Priority claimed from CH00445/13A external-priority patent/CH707561A1/en
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2767625A1 publication Critical patent/EP2767625A1/en
Application granted granted Critical
Publication of EP2767625B1 publication Critical patent/EP2767625B1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • 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
    • D01H13/30—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist

Definitions

  • the invention relates to a spinning station of an air jet spinning machine for spinning a fiber structure into a yarn.
  • the spinning station has a compressed air supply line, a delivery roller pair and a spinneret, wherein the spinneret has a housing with compressed air injections, a Garn Strukturselement and a nozzle interior.
  • the fiber structure is fed to the delivery roller pair of the spinneret. Subsequently, a yarn is formed by the yarn formation element with a vortex flow generated by the compressed air injections from the fiber structure.
  • Air jet spinning machines with appropriately equipped spinning stations are known in the art and serve to produce a yarn from an elongated fiber structure.
  • the outer fibers of the fiber composite are wound around the inner core fibers in the area of an inlet mouth of the yarn formation element by means of a vortex air flow generated via compressed-air injections within the spinneret, and finally form the binder fibers which determine the desired strength of the yarn.
  • This creates a yarn with a rotation, which finally discharged via a Garn Adjustskanal from the spinneret and z. B. can be wound on a spool.
  • yarn is generally to be understood as a fiber structure in which at least some of the fibers are wound around an inner core.
  • So z. B a yarn in the conventional sense, which can be processed for example by means of a loom to a fabric.
  • the invention relates to spinning stations of air jet spinning machines, with the help of so-called roving (other name: Lunte) can be produced.
  • roving other name: Lunte
  • This roving is characterized by the fact that, despite a certain strength, sufficient to roving to transport to a subsequent textile machine, is still delayable. The roving can thus with the help of a defaulting device, z.
  • a roving processing textile machine such as a ring spinning machine
  • yarn is to be understood as meaning a yarn or roving produced with an air jet spinning machine.
  • man-made fibers for example polyesters, or blends of natural and man-made fibers
  • deposits are formed on the surface of the yarn-forming element.
  • the production of man-made fibers comprises a so-called preparation of the continuous fibers during the manufacturing process, while a spin finish, usually oils with various additives, is applied to the continuous fibers, which enables a treatment such as stretching the continuous fibers at high speeds. Some of these preparation agents remain adhering to the chemical fibers in the further treatment and lead to impurities in the air jet spinning machine.
  • the fibers supplied to the air jet spinning machine in the form of a fiber structure are usually supplied to the spinneret by a delivery roller pair.
  • the delivery roller pair may correspond to an output roller pair of a drafting system. Used drafting systems serve to refine the submitted fiber structure before entering the spinneret.
  • a fiber guide element is arranged, via which the fiber structure is guided into the spinneret to the yarn-forming element.
  • Garn Guesssetti spindles are used with an inner yarn guide channel majority.
  • compressed air is introduced through the housing wall of the spinneret such by the compressed air nozzles in the spinneret interior, that there is a rotating fluidized air flow. This results in that from the fiber strand leaving the fiber guide element individual outer fibers are separated and turned over the top of Garn Struktursettis. In the further course, these removed fibers rotate on the surface of the yarn-forming element.
  • the EP 2 450 478 discloses a device which allows automatic cleaning without stopping the machine.
  • an additive is added to the compressed air used for the formation of the fluidized air flow within the spinneret.
  • the additive is fed through the compressed air into the spinneret and causes a cleaning of the affected surfaces.
  • a disadvantage of the disclosed cleaning system is that an additional compressed air supply to all spinning stations of the air jet spinning machine is necessary and conditional for the supply of the additive As a result, a complicated regulation of the metering of the additive is to be provided in order to avoid overdosing of the additive when individual spinning stations are at a standstill.
  • Another embodiment of a cleaning of the Garn Struktursiatas discloses the JP-2008-095-208 , An additive is also supplied to the compressed air used for the turbulence in the spinneret and passed with this compressed air in the spinneret and thus to the Garn Strukturselement.
  • the dosage and addition of the additive is separately provided for each spinning station in the disclosed embodiment.
  • EP 2 302 114 A2 describes an air-spinning machine, which also allows an additive addition in the compressed air supply to the spinning stations.
  • a second compressed air supply is provided to provide the spinning stations alternately with pure compressed air or with additive offset air.
  • a disadvantage of the prior art is that a direct metering of the additive takes place. As a result, an exact dosage mur is possible by means of a complex control. In addition, a pressurized additive storage is necessary, which leads to high safety and operating expenses when using various additives.
  • the object of the invention is to provide a spinning station with a device which allows a cleaning of the Garn Struktursiatas and the Spinndüseninnenraums with the aid of an additive, wherein a simple metering of the additive should take place, which also allows a pressureless storage of the additive.
  • the spinning station has a compressed air supply line, a delivery roller pair and a spinneret, wherein the spinneret has a housing with compressed air injections, a Garn Strukturselement and a nozzle interior.
  • the fiber structure is fed to the delivery roller pair of the spinneret.
  • a yarn is formed by the yarn formation element with a vortex flow generated by the compressed air injections from the fiber structure.
  • a supply of a liquid additive in the compressed air supply with a dosage wherein the dosage of the liquid additive has a metering pump with a metering range of 0.01 ml to 1.0 ml per minute.
  • Air jet spinning machines usually have several spinning stations. At each spinning station, a yarn is produced independently of the other spinning stations from a submitted fiber structure. The independence of the individual spinning stations from each other can go so far that different yarns or yarns made of different materials can be produced on adjacent spinning stations.
  • the presented fiber structure consists of an accumulation of individual fibers, which are aligned in the longitudinal direction of the fiber structure.
  • the fibers of a fiber structure can consist of different materials. Frequently used are manmade fibers made of various types of synthetic materials and cotton fibers and mixtures thereof.
  • chemical fibers or blends with chemical fibers, such as polyester fibers build up within the spinneret impurities, which have their origin in the production of man-made fibers. These adhesions carried by the fibers can not be avoided due to the manufacturing process. Also can not be avoided the formation of deposition by damaged fiber.
  • the spinning station of an air jet spinning machine for spinning a fiber strand into a yarn has at least one pair of delivery rolls and one Spinneret on.
  • the delivery roller pair may correspond to the pair of output rollers of this drafting system in the presence of a drafting system.
  • the spinneret has a yarn-forming element, which is arranged in a housing. Compressed air injections provided in the housing introduce compressed air into the spinneret interior. The compressed air injections are arranged in such a way that a rotating fluidized air flow results in the housing, which with the aid of the yarn formation element leads to the transformation of the fiber structure into a yarn or roving.
  • the necessary for the operation of the spinnerets compressed air is generated by a compressed air source and fed via compressed air supply lines to the compressed air supply to each spinning station.
  • the compressed air supply to a spinning station leads the compressed air to the compressed air injections which are arranged in the housing of the spinneret.
  • the supply of the additive takes place in the compressed air supply of a spinneret and has a dosage with a metering pump.
  • the additive is introduced via an Additiveindüsung in a compressed air supply line, which leads to the compressed air supply.
  • the supply of the additive in the compressed air supply takes place before a distribution of the compressed air flow to the various compressed air injections of the spinneret.
  • the dosing pump is designed as a gear pump, peristaltic pump or diaphragm pump.
  • the metering pump generates the pressure necessary for the additive injection. Via an additive feed, the additive is fed by the pump to the additive injection, through which the additive passes into the compressed air supply line.
  • the design of the outlet opening of the Additiveindüsung in the compressed air supply line can be designed in many ways. For example, it may be oblique to the course of the compressed air supply line. Also is a nozzle shape or a wide outlet opening conceivable. Also, the outlet opening can be additionally provided with a spray head. A spray head serves to better distribution of the additive by dissolution of the additive into fine components.
  • the spinning performance of today's air jet spinning machines is between 200 m and 600 m yarn per minute.
  • the metered amount of the additive to be added is to be adjusted.
  • the amount of additive of the respective spinning performance of a spinning station can be adjusted.
  • the dosage depends on the properties of the additive to be dosed and the material to be spun.
  • the type of additive includes both liquids or solid particles or gaseous media as well as all mixtures thereof.
  • a cleaning liquid or water or water with the admixture of a cleaning liquid is advantageous in the case of heavy contamination of the yarn-forming element.
  • solid particles for cleaning it is also the addition of solid particles for cleaning conceivable.
  • additives which are added to the fiber structure can be used to achieve certain effects in the yarn produced. It is also possible in the combination of the choice of material of the fiber structure and the corresponding additive to reinforce certain yarn properties, such as the strength or the appearance, or to change compared to a yarn production with the same fiber structure without the addition of an additive. Due to this aspect, an addition of an additive is also useful if no cleaning of Garn Struktursijns is necessary, as is the case with the processing of natural fibers, such as cotton.
  • the metering pump according to the invention has a metering range of 0.01 ml to 1.0 ml per minute.
  • an intermittent dosage for example by switching on and off the metering pump, is provided. Due to the material of the fiber structure to be processed, the duration of an additive supply and the necessary interval between the dosages can be determined by the satisfactory cleaning of Garn Guesssides and the spinneret interior is achieved without affecting the properties of the yarn produced sustainable. However, it can also be provided a continuous supply of the additive.
  • the additive supply has a switchover between different additives.
  • This has the advantage that when a supply of an additive for the purpose of cleaning a short additional addition of a substance for the removal of residues formed by the additive, for example in the compressed air leading parts, possible without the addition of the additive for this purpose rebuild to have to.
  • various additives can be provided due to a material change.
  • the object is also achieved by a method for supplying an additive in the compressed air supply to a spinneret at a spinning station of an air jet spinning machine with a delivery roller pair and a spinneret in that a liquid additive is injected into the compressed air supply to a compressed air supply, wherein the liquid additive with a Metering is metered before the additive injection, which has a metering range of 0.01 ml to 1.0 ml per minute.
  • the metering device can be controlled such that the supply of the additive is adjusted in accordance with the instantaneous spinning performance of the spinning station.
  • an air jet spinning machine with a single or several spinning stations can be equipped with appropriate means for supplying an additive.
  • a switching between the supply of different additives or different means for supplying the additive to the fiber structure at a single spinning station or different spinning stations is provided.
  • FIG. 1 shows a schematic representation of a spinning station 1 of an air jet spinning machine.
  • the spinning station 1 shown has a spinneret 5 and a pair of delivery rollers 4.
  • the spinneret 5 has a housing 6 and a Garn Strukturselement 7 located at least partially in the housing 6 with a Garn arrangementskanal 8.
  • the housing 6 is opposite to the delivery roller pair 2 penetrated by a fiber guide element. 9
  • the spinning station 1 is supplied via a compressed air supply line 11 with compressed air. From the compressed air supply line 11, the compressed air via the compressed air supply 12 to the compressed air injections 13.
  • the compressed air injections 13 are arranged such that the passing through them in the Spinndüseninnraum 20 compressed air, a rotating vortex flow 14 is generated at the top of Garn Strukturselements 7.
  • the fiber structure 2 is fed through the delivery roller pair 4 of the spinneret 5.
  • the fiber structure 2 is guided by the fiber guide element 9 into the spinneret interior 20.
  • individual outward fibers 15 are removed from the fiber structure 2 by the turbulence flow 14. Since the individual fibers 15 are grasped by one end of the yarn formation element 7, the other end of the individual fibers 15 is turned over the tip of the yarn formation element 7 and subsequently wound around the unaffected internal fibers of the fiber structure 2.
  • the resulting yarn 3 is discharged from the spinneret 5 through a yarn guide channel 8 disposed inside the yarn forming member 7.
  • the delivery roller pair 4 may be identical to the delivery roller pair of an upstream drafting system (not shown). Also, at the outlet of the spinneret 5, a Austragswalzencru (not shown) may be arranged.
  • an additive injection 19 is provided in the compressed air supply line 11 .
  • the additive is transported by an additive supply 16 with a metering pump 18 via an additive feed 17 to the additive injection 19.
  • the additive is entrained in the direction of the compressed air supply 12 and distributed through the latter into the compressed air injections 13.
  • the introduced by the compressed air injections 13 in the spinneret interior 20 additive is characterized by in the spinneret interior 20 prevailing vortex flow 14 at the contaminated surfaces of Garnsentettis 7 and the spinneret interior 20 along.
  • the additive supply 17 the additive for Additiveindüsung 19 is performed.
  • the additive injection 19 is adapted in its shape, extent and arrangement to the amount to be metered as well as to the type of additive used.
  • the metering pump 18 the amount of the additive as well as the time period of an additive addition is regulated.

Description

Die Erfindung betrifft eine Spinnstelle einer Luftdüsenspinnmaschine zum Verspinnen eines Faserverbandes zu einem Garn. Die Spinnstelle weist eine Druckluftzuleitung, ein Lieferwalzenpaar und eine Spinndüse auf, wobei die Spinndüse ein Gehäuse mit Drucklufteindüsungen, ein Garnbildungselement und einen Düseninnenraum aufweist. Der Faserverband wird mit dem Lieferwalzenpaar der Spinndüse zugeführt. Anschließend wird durch das Garnbildungselement mit einer über die Drucklufteindüsungen erzeugten Wirbelströmung aus dem Faserverband ein Garn gebildet.The invention relates to a spinning station of an air jet spinning machine for spinning a fiber structure into a yarn. The spinning station has a compressed air supply line, a delivery roller pair and a spinneret, wherein the spinneret has a housing with compressed air injections, a Garnbildungselement and a nozzle interior. The fiber structure is fed to the delivery roller pair of the spinneret. Subsequently, a yarn is formed by the yarn formation element with a vortex flow generated by the compressed air injections from the fiber structure.

Luftdüsenspinnmaschinen mit entsprechend ausgestatteten Spinnstellen sind im Stand der Technik bekannt und dienen der Herstellung eines Garns aus einem länglichen Faserverband. Die äußeren Fasern des Faserverbands werden hierbei mit einer über Drucklufteindüsungen innerhalb der Spinndüse erzeugten Wirbelluftströmung im Bereich einer Einlassmündung des Garnbildungselementes um die innenliegenden Kernfasern gewunden und bilden schließlich die für die gewünschte Festigkeit des Garns ausschlaggebenden Umwindefasern. Hierdurch entsteht ein Garn mit einer Drehung, welches schließlich über einen Garnführungskanal aus der Spinndüse abgeführt und z. B. auf eine Spule aufgewickelt werden kann.Air jet spinning machines with appropriately equipped spinning stations are known in the art and serve to produce a yarn from an elongated fiber structure. In this case, the outer fibers of the fiber composite are wound around the inner core fibers in the area of an inlet mouth of the yarn formation element by means of a vortex air flow generated via compressed-air injections within the spinneret, and finally form the binder fibers which determine the desired strength of the yarn. This creates a yarn with a rotation, which finally discharged via a Garnführungskanal from the spinneret and z. B. can be wound on a spool.

Gattungsgemäße Spinnstellen sind im Stand der Technik bekannt, wobei im Sinne der Erfindung unter dem Begriff Garn generell ein Faserverband zu verstehen ist, bei dem zumindest ein Teil der Fasern um einen innenliegenden Kern gewunden sind. Umfasst ist somit z. B. ein Garn im herkömmlichen Sinne, das beispielsweise mit Hilfe einer Webmaschine zu einem Stoff verarbeitet werden kann. Ebenso betrifft die Erfindung Spinnstellen von Luftdüsenspinnmaschinen, mit deren Hilfe sogenanntes Vorgarn (andere Bezeichnung: Lunte) hergestellt werden kann. Dieses Vorgarn zeichnet sich dadurch aus, dass es trotz einer gewissen Festigkeit, die ausreicht, um das Vorgarn zu einer nachfolgenden Textilmaschine zu transportieren, noch immer verzugsfähig ist. Das Vorgarn kann also mit Hilfe einer Verzugseinrichtung, z. B. dem Streckwerk, einer das Vorgarn verarbeitenden Textilmaschine, beispielsweise einer Ringspinnmaschine, verzogen werden, bevor es endgültig versponnen wird. Unter dem Begriff Garn ist im Sinne der vorliegenden Erfindung ein mit einer Luftdüsenspinnmaschine hergestelltes Garn oder Vorgarn zu verstehen.Generic spinning stations are known in the prior art, wherein for the purposes of the invention the term yarn is generally to be understood as a fiber structure in which at least some of the fibers are wound around an inner core. So z. B. a yarn in the conventional sense, which can be processed for example by means of a loom to a fabric. Likewise, the invention relates to spinning stations of air jet spinning machines, with the help of so-called roving (other name: Lunte) can be produced. This roving is characterized by the fact that, despite a certain strength, sufficient to roving to transport to a subsequent textile machine, is still delayable. The roving can thus with the help of a defaulting device, z. As the drafting system, a roving processing textile machine, such as a ring spinning machine, are warped before it is finally spun. For the purposes of the present invention, the term yarn is to be understood as meaning a yarn or roving produced with an air jet spinning machine.

Bei der Herstellung von Chemiefasern, beispielsweise Polyester, oder Gemischen aus Natur- und Chemiefasern entstehen Ablagerungen auf der Oberfläche des Garnbildungselements. Die Herstellung von Chemiefasern umfasst eine sogenannte Präparation der Endlosfasern während des Herstellungsprozesses, dabei wird auf die Endlosfasern ein Präparationsmittel, meist Öle mit verschiedenartigen Zusätzen, aufgebracht welches eine Behandlung wie beispielsweise Strecken der Endlosfasern bei hohen Geschwindigkeiten ermöglicht. Diese Präparationsmittel bleiben teilweise an den Chemiefasern auch in der weiteren Behandlung haften und führen in der Luftdüsenspinnmaschine zu Verunreinigungen. Die der Luftdüsenspinnmaschine in Form eines Faserverbandes zugeführten Fasern werden in der Regel durch ein Lieferwalzenpaar der Spinndüse zugeführt. Das Lieferwalzenpaar kann einem Ausgangswalzenpaar eines Streckwerks entsprechen. Zur Anwendung kommende Streckwerke dienen einer Verfeinerung des vorgelegten Faserverbandes vor dem Eintritt in die Spinndüse.In the production of man-made fibers, for example polyesters, or blends of natural and man-made fibers, deposits are formed on the surface of the yarn-forming element. The production of man-made fibers comprises a so-called preparation of the continuous fibers during the manufacturing process, while a spin finish, usually oils with various additives, is applied to the continuous fibers, which enables a treatment such as stretching the continuous fibers at high speeds. Some of these preparation agents remain adhering to the chemical fibers in the further treatment and lead to impurities in the air jet spinning machine. The fibers supplied to the air jet spinning machine in the form of a fiber structure are usually supplied to the spinneret by a delivery roller pair. The delivery roller pair may correspond to an output roller pair of a drafting system. Used drafting systems serve to refine the submitted fiber structure before entering the spinneret.

Im Eintrittsbereich der Spinndüse ist ein Faserführungselement angeordnet, über welches der Faserverband in die Spinndüse zum Garnbildungselement geführt wird. Als Garnbildungselemente werden mehrheitlich Spindeln mit einem innenliegenden Garnführungskanal verwendet. An der Spitze des Garnbildungselementes wird durch die Gehäusewandung der Spinndüse Druckluft derart durch die Druckluftdüsen in den Spinndüseninnenraum eingebracht, dass sich eine rotierende Wirbelluftströmung ergibt. Dies führt dazu, dass aus dem das Faserführungselement verlassenden Faserverband einzelne außenliegende Fasern abgetrennt und über die Spitze des Garnbildungselementes umgeschlagen werden. Im weiteren Verlauf rotieren diese herausgelösten Fasern auf der Oberfläche des Garnbildungselementes. In der Folge werden durch die Vorwärtsbewegung der innenliegenden Kernfasern des Faserverbandes die rotierenden Fasern um die Kernfasern gewunden und dadurch das Garn gebildet. Durch die Bewegung der einzelnen Fasern über die Oberfläche des Garnbildungselementes bilden sich auf dem Garnbildungselement Ablagerungen aufgrund der Anhaftungen an den Fasern aus dem Herstellungsprozess. Ablagerungen auf dem Garnbildungselement können auch durch beschädigte Fasern hervorgerufen werden. Ablagerungen können aus denselben Gründen auch auf der Oberfläche des Spinndüseninnenraumes entstehen. Diese Anhaftungen führen zu einer Verschlechterung der Oberflächenbeschaffenheit des Garnbildungselementes und des Spinndüseninnenraumes und verursachen eine Verringerung der hergestellten Garnqualität. Eine regelmäßige Reinigung der betroffenen Oberflächen ist notwendig um eine gleichbleibende Qualität der gesponnen Garne aufrechterhalten zu können.In the entry region of the spinneret, a fiber guide element is arranged, via which the fiber structure is guided into the spinneret to the yarn-forming element. As Garnbildungselemente spindles are used with an inner yarn guide channel majority. At the tip of the Garnbildungselementes compressed air is introduced through the housing wall of the spinneret such by the compressed air nozzles in the spinneret interior, that there is a rotating fluidized air flow. This results in that from the fiber strand leaving the fiber guide element individual outer fibers are separated and turned over the top of Garnbildungselementes. In the further course, these removed fibers rotate on the surface of the yarn-forming element. As a result, by the forward movement of the inner core fibers of the fiber structure, the rotating fibers are wound around the core fibers, thereby forming the yarn. As a result of the movement of the individual fibers over the surface of the yarn formation element, deposits form on the yarn formation element due to the adhesion to the fibers from the production process. Deposits on the yarn-forming element can also be caused by damaged fibers. Deposits may also arise on the surface of the spinneret interior for the same reasons. These adhesions lead to a deterioration of the surface quality of the Garnbildungselementes and the spinneret interior and cause a reduction in the yarn quality produced. Regular cleaning of the affected surfaces is necessary in order to maintain a consistent quality of the spun yarns.

Die Reinigung der Oberflächen des Garnbildungselementes und des Spinndüseninnenraumes kann manuell durch einen periodischen Ausbau des Garnbildungselementes erfolgen, was jedoch zu einem nicht unerheblichen Wartungsaufwand, verbunden mit einem entsprechenden Betriebsausfall, führt.The cleaning of the surfaces of Garnbildungselementes and the Spinndüseninnenraumes can be done manually by a periodic removal of Garnbildungselementes, but this leads to a considerable maintenance, combined with a corresponding breakdown.

Die EP 2 450 478 offenbart hingegen eine Vorrichtung, welche es erlaubt eine automatische Reinigung ohne Stillsetzen der Maschine auszuführen. Zu diesem Zweck wird der für die Bildung der Wirbelluftströmung innerhalb der Spinndüse verwendeten Druckluft ein Additiv beigemischt. Das Additiv wird durch die Druckluft in die Spinndüse geführt und bewirkt eine Reinigung der betroffenen Oberflächen. Nachteilig am offenbarten Reinigungssystem ist, dass für die Zuführung des Additivs eine zusätzliche Druckluftversorgung sämtlicher Spinnstellen der Luftdüsenspinnmaschine notwendig ist und bedingt dadurch eine aufwändige Regelung der Dosierung des Additivs vorzusehen ist, um eine Überdosierung des Additivs bei Stillstand einzelner Spinnstellen zu vermeiden.The EP 2 450 478 on the other hand discloses a device which allows automatic cleaning without stopping the machine. For this purpose, an additive is added to the compressed air used for the formation of the fluidized air flow within the spinneret. The additive is fed through the compressed air into the spinneret and causes a cleaning of the affected surfaces. A disadvantage of the disclosed cleaning system is that an additional compressed air supply to all spinning stations of the air jet spinning machine is necessary and conditional for the supply of the additive As a result, a complicated regulation of the metering of the additive is to be provided in order to avoid overdosing of the additive when individual spinning stations are at a standstill.

Eine weitere Ausführung einer Reinigung des Garnbildungselementes offenbart die JP-2008-095-208 . Ein Additiv wird ebenfalls der für die Verwirbelung in der Spinndüse verwendeten Druckluft zugeführt und mit dieser Druckluft in die Spinndüse und damit an das Garnbildungselement geführt. Die Dosierung und Zugabe des Additivs ist in der offenbarten Ausführung für jede Spinnstelle separat vorgesehen.Another embodiment of a cleaning of the Garnbildungselementes discloses the JP-2008-095-208 , An additive is also supplied to the compressed air used for the turbulence in the spinneret and passed with this compressed air in the spinneret and thus to the Garnbildungselement. The dosage and addition of the additive is separately provided for each spinning station in the disclosed embodiment.

Schließlich wird auch in der EP 2 302 114 A2 eine Luftspinnmaschine beschrieben, die ebenfalls eine Additivzugabe in die Druckluftversorgung der Spinnstellen ermöglicht. Zudem ist eine zweite Druckluftversorgung vorhanden, um die Spinnstellen abwechselnd mit reiner Druckluft oder mit Additiv versetzter Luft versorgen zu können.Finally, in the EP 2 302 114 A2 describes an air-spinning machine, which also allows an additive addition in the compressed air supply to the spinning stations. In addition, a second compressed air supply is provided to provide the spinning stations alternately with pure compressed air or with additive offset air.

Nachteilig im Stand der Technik ist, dass eine direkte Dosierung des Additivs erfolgt. Dadurch ist eine exakte Dosierung mur mittels einer aufwändigen Regelung möglich. Zusätzlich ist eine unter Druck stehende Additivbevorratung notwendig, was bei Verwendung verschiedener Additive zu hohen Sicherheits- und Arbeitstechnischen Aufwendungen führt.A disadvantage of the prior art is that a direct metering of the additive takes place. As a result, an exact dosage mur is possible by means of a complex control. In addition, a pressurized additive storage is necessary, which leads to high safety and operating expenses when using various additives.

Die Aufgabe der Erfindung ist es, eine Spinnstelle mit einer Vorrichtung zu schaffen, welche eine Reinigung des Garnbildungselementes und des Spinndüseninnenraums mit Hilfe eines Additivs ermöglicht, wobei eine einfache Dosierung des Additivs erfolgen soll, welche auch eine drucklose Bevorratung des Additivs ermöglicht.The object of the invention is to provide a spinning station with a device which allows a cleaning of the Garnbildungselementes and the Spinndüseninnenraums with the aid of an additive, wherein a simple metering of the additive should take place, which also allows a pressureless storage of the additive.

Die Aufgabe wird gelöst durch die Merkmale im kennzeichnenden Teil der unabhängigen Ansprüche.The object is solved by the features in the characterizing part of the independent claims.

Zur Lösung der Aufgabe wird eine neuartige Spinnstelle vorgeschlagen. Die Spinnstelle weist eine Druckluftzuleitung, ein Lieferwalzenpaar und eine Spinndüse auf, wobei die Spinndüse ein Gehäuse mit Drucklufteindüsungen, ein Garnbildungselement und einen Düseninnenraum aufweist. Der Faserverband wird mit dem Lieferwalzenpaar der Spinndüse zugeführt. Anschließend wird durch das Garnbildungselement mit einer über die Drucklufteindüsungen erzeugten Wirbelströmung aus dem Faserverband ein Garn gebildet. Es ist eine Zuführung eines flüssigen Additivs in die Druckluftversorgung mit einer Dosierung vorgesehen, wobei die Dosierung des flüssigen Additivs eine Dosierpumpe mit einem Dosierbereich von 0,01 ml bis 1,0 ml pro Minute aufweist.To solve the problem, a novel spinning station is proposed. The spinning station has a compressed air supply line, a delivery roller pair and a spinneret, wherein the spinneret has a housing with compressed air injections, a Garnbildungselement and a nozzle interior. The fiber structure is fed to the delivery roller pair of the spinneret. Subsequently, a yarn is formed by the yarn formation element with a vortex flow generated by the compressed air injections from the fiber structure. There is provided a supply of a liquid additive in the compressed air supply with a dosage, wherein the dosage of the liquid additive has a metering pump with a metering range of 0.01 ml to 1.0 ml per minute.

Luftdüsenspinnmaschinen weisen zumeist mehrere Spinnstellen auf. An jeder Spinnstelle wird dabei unabhängig von den anderen Spinnstellen aus einem vorgelegten Faserverband ein Garn hergestellt. Die Unabhängigkeit der einzelnen Spinnstellen voneinander kann dabei so weit gehen, dass auf benachbarten Spinnstellen unterschiedliche Garne oder Garne aus unterschiedlichen Materialien hergestellt werden können.Air jet spinning machines usually have several spinning stations. At each spinning station, a yarn is produced independently of the other spinning stations from a submitted fiber structure. The independence of the individual spinning stations from each other can go so far that different yarns or yarns made of different materials can be produced on adjacent spinning stations.

Der vorgelegte Faserverband besteht dabei aus einer Ansammlung von einzelnen Fasern, welche in Längsrichtung des Faserverbandes ausgerichtet sind. Die Fasern eines Faserverbandes können dabei aus verschiedenen Materialien bestehen. Häufige Anwendung finden dabei Chemiefasern aus verschiedenartigen Kunststoffen und Baumwollfasern sowie Mischungen davon. Bei Verwendung von Chemiefasern oder Mischungen mit Chemiefasern, beispielsweise Polyesterfasern, bauen sich innerhalb der Spinndüse Verunreinigungen auf, welche ihren Ursprung in der Herstellung der Chemiefasern haben. Diese durch die Fasern mitgeführten Anhaftungen können aufgrund des Herstellungsprozesses nicht vermieden werden. Ebenfalls nicht vermieden werden kann die Bildung von Ablagerung durch beschädigte Faser.The presented fiber structure consists of an accumulation of individual fibers, which are aligned in the longitudinal direction of the fiber structure. The fibers of a fiber structure can consist of different materials. Frequently used are manmade fibers made of various types of synthetic materials and cotton fibers and mixtures thereof. When using chemical fibers or blends with chemical fibers, such as polyester fibers, build up within the spinneret impurities, which have their origin in the production of man-made fibers. These adhesions carried by the fibers can not be avoided due to the manufacturing process. Also can not be avoided the formation of deposition by damaged fiber.

Die Spinnstelle einer Luftdüsenspinnmaschine zum Verspinnen eines Faserverbandes zu einem Garn weist zumindest ein Lieferwalzenpaar und eine Spinndüse auf. Das Lieferwalzenpaar kann bei Vorhandensein eines Streckwerkes dem Ausgangswalzenpaar dieses Streckwerkes entsprechen. Es ist jedoch auch möglich ein zusätzliches Lieferwalzenpaar zur Zuführung des Faserverbandes zur Spinndüse anzuordnen. Die Spinndüse weist ein Garnbildungselement auf, dieses ist in einem Gehäuse angeordnet. Über im Gehäuse vorgesehene Drucklufteindüsungen wird Druckluft in den Spinndüseninnenraum eingebracht. Die Drucklufteindüsungen sind derart angeordnet, dass im Gehäuse eine rotierende Wirbelluftströmung entsteht, welche mit Hilfe des Garnbildungselementes zur Umbildung des Faserverbandes in ein Garn oder Vorgarn führt.The spinning station of an air jet spinning machine for spinning a fiber strand into a yarn has at least one pair of delivery rolls and one Spinneret on. The delivery roller pair may correspond to the pair of output rollers of this drafting system in the presence of a drafting system. However, it is also possible to arrange an additional delivery roller pair for feeding the fiber structure to the spinneret. The spinneret has a yarn-forming element, which is arranged in a housing. Compressed air injections provided in the housing introduce compressed air into the spinneret interior. The compressed air injections are arranged in such a way that a rotating fluidized air flow results in the housing, which with the aid of the yarn formation element leads to the transformation of the fiber structure into a yarn or roving.

Die für den Betrieb der Spinndüsen notwendige Druckluft wird durch eine Druckluftquelle erzeugt und über Druckluftzuleitungen zur Druckluftversorgung einer jeden Spinnstelle geführt. Die Druckluftversorgung einer Spinnstelle führt die Druckluft zu den Drucklufteindüsungen welche im Gehäuse der Spinndüse angeordnet sind. Die Zuführung des Additivs erfolgt in die Druckluftversorgung einer Spinndüse und weist eine Dosierung mit einer Dosierpumpe auf. Das Additiv wird über eine Additiveindüsung in eine Druckluftzuleitung eingebracht, welche zur Druckluftversorgung führt. Die Zuführung des Additivs in die Druckluftversorgung erfolgt vor einer Aufteilung des Druckluftstromes auf die verschiedenen Drucklufteindüsungen der Spinndüse.The necessary for the operation of the spinnerets compressed air is generated by a compressed air source and fed via compressed air supply lines to the compressed air supply to each spinning station. The compressed air supply to a spinning station leads the compressed air to the compressed air injections which are arranged in the housing of the spinneret. The supply of the additive takes place in the compressed air supply of a spinneret and has a dosage with a metering pump. The additive is introduced via an Additiveindüsung in a compressed air supply line, which leads to the compressed air supply. The supply of the additive in the compressed air supply takes place before a distribution of the compressed air flow to the various compressed air injections of the spinneret.

Die Dosierpumpe ist ausgeführt als Zahnradpumpe, Schlauchquetschpumpe oder Membranpumpe. Durch die Dosierpumpe wird der für die Additiveindüsung notwendige Druck erzeugt. Über eine Additivzuführung wird das Additiv von der Pumpe zur Additiveindüsung geführt, durch welche das Additiv in die Druckluftzuleitung gelangt.The dosing pump is designed as a gear pump, peristaltic pump or diaphragm pump. The metering pump generates the pressure necessary for the additive injection. Via an additive feed, the additive is fed by the pump to the additive injection, through which the additive passes into the compressed air supply line.

Die Gestaltung der Austrittsöffnung der Additiveindüsung in die Druckluftzuleitung kann vielfältig gestaltet sein. Beispielsweise kann sie schräg zum Verlauf der Druckluftzuleitung sein. Ebenfalls ist eine Düsenform oder eine sich weitende Austrittsöffnung denkbar. Auch kann die Austrittsöffnung zusätzlich mit einem Sprühkopf versehen werden. Ein Sprühkopf dient der besseren Verteilung des Additivs durch eine Auflösung des Additivs in feine Bestandteile.The design of the outlet opening of the Additiveindüsung in the compressed air supply line can be designed in many ways. For example, it may be oblique to the course of the compressed air supply line. Also is a nozzle shape or a wide outlet opening conceivable. Also, the outlet opening can be additionally provided with a spray head. A spray head serves to better distribution of the additive by dissolution of the additive into fine components.

Die Spinnleistung heutiger Luftdüsenspinnmaschinen liegt zwischen 200 m und 600 m Garn pro Minute. Entsprechend der momentanen Spinnleistung einer Spinnstelle ist die dosierte Menge des zuzufügenden Additivs anzupassen. Durch eine geregelte Dosierung kann die Menge des Additivs der jeweiligen Spinnleistung einer Spinnstelle angepasst werden. Ebenfalls ist die Dosierung abhängig von den Eigenschaften des zu dosierenden Additivs und des zu verspinnenden Materials.The spinning performance of today's air jet spinning machines is between 200 m and 600 m yarn per minute. According to the instantaneous spinning performance of a spinning station, the metered amount of the additive to be added is to be adjusted. By controlled dosing, the amount of additive of the respective spinning performance of a spinning station can be adjusted. Also, the dosage depends on the properties of the additive to be dosed and the material to be spun.

Die Art des Additivs umfasst sowohl Flüssigkeiten oder Feststoffpartikel oder gasförmige Medien wie auch alle Mischungen davon. Beispielsweise ist als Additiv eine Reinigungsflüssigkeit oder Wasser oder Wasser mit der Beimischung einer Reinigungsflüssigkeit vorteilhaft bei starken Verunreinigungen des Garnbildungselementes. Es ist jedoch auch die Beigabe von Feststoffpartikeln zu Reinigungszwecken denkbar.The type of additive includes both liquids or solid particles or gaseous media as well as all mixtures thereof. For example, as an additive, a cleaning liquid or water or water with the admixture of a cleaning liquid is advantageous in the case of heavy contamination of the yarn-forming element. However, it is also the addition of solid particles for cleaning conceivable.

Bei der Wahl des Additivs ergibt sich auch die Möglichkeit einen Einfluss auf die Eigenschaften des herzustellenden Garns zu nehmen. Beispielsweise können durch Additive welche dem Faserverband beigegeben werden bestimmte Effekte im hergestellten Garn erzielt werden. Auch ist es möglich in der Kombination der Materialwahl des Faserverbandes und des entsprechenden Additives bestimmte Garneigenschaften, wie beispielsweise die Festigkeit oder die Optik zu verstärken, respektive zu verändern im Vergleich zu einer Garnherstellung mit demselben Faserverband ohne Zugabe eines Additivs. Aufgrund dieses Aspektes ist eine Beigabe eines Additivs auch sinnvoll, wenn keine Reinigung des Garnbildungselementes notwendig ist, wie dies bei der Verarbeitung von Naturfasern, beispielsweise Baumwolle, der Fall ist.When choosing the additive, there is also the possibility of having an influence on the properties of the yarn to be produced. For example, additives which are added to the fiber structure can be used to achieve certain effects in the yarn produced. It is also possible in the combination of the choice of material of the fiber structure and the corresponding additive to reinforce certain yarn properties, such as the strength or the appearance, or to change compared to a yarn production with the same fiber structure without the addition of an additive. Due to this aspect, an addition of an additive is also useful if no cleaning of Garnbildungselementes is necessary, as is the case with the processing of natural fibers, such as cotton.

Für die Zugabe von flüssigen Additiven, im Speziellen zur Verbesserung der Garneigenschaften hat es sich als vorteilhaft erwiesen, dass die Dosierpumpe erfindungsgemäß einen Dosierbereich von 0.01 ml bis 1.0 ml pro Minute aufweist.For the addition of liquid additives, in particular for improving the yarn properties, it has proved to be advantageous that the metering pump according to the invention has a metering range of 0.01 ml to 1.0 ml per minute.

Zur Reinigung des Garnbildungselementes und des Spinndüseninnenraumes, kann es bei geringer Verschmutzung genügen, dass eine intermittierende Dosierung, beispielsweise durch Ein- und Ausschalten der Dosierpumpe, vorgesehen ist. Aufgrund des zu verarbeitenden Materials des Faserverbandes kann die Dauer einer Additiv-Zuführung sowie das notwendige Intervall zwischen den Dosierungen bestimmt werden durch die eine zufriedenstellende Reinigung des Garnbildungselementes und des Spinndüseninnenraumes erreicht wird, ohne die Eigenschaften des hergestellten Garns nachhaltig zu beeinflussen. Es kann jedoch auch eine dauernde Zuführung des Additivs vorgesehen werden.To clean the Garnbildungselementes and the Spinndüseninnenraumes, it may be sufficient for low pollution that an intermittent dosage, for example by switching on and off the metering pump, is provided. Due to the material of the fiber structure to be processed, the duration of an additive supply and the necessary interval between the dosages can be determined by the satisfactory cleaning of Garnbildungselementes and the spinneret interior is achieved without affecting the properties of the yarn produced sustainable. However, it can also be provided a continuous supply of the additive.

In einer vorteilhaften Weiterbildung der Vorrichtung besteht die Möglichkeit, dass die Additivzuführung eine Umschaltung zwischen verschiedenen Additiven aufweist. Dies hat den Vorteil, dass bei einer Zuführung von einem Additiv zum Zwecke der Reinigung eine kurzzeitige zusätzliche Zugabe eines Stoffes zur Beseitigung von durch das Additiv gebildeten Rückständen, beispielsweise in den Druckluft führenden Teilen, möglich ist, ohne die Zugabe des Additivs zu diesem Zweck umbauen zu müssen. Auch können verschiedene Additive aufgrund eines Materialwechsels vorgehalten werden.In an advantageous development of the device, there is the possibility that the additive supply has a switchover between different additives. This has the advantage that when a supply of an additive for the purpose of cleaning a short additional addition of a substance for the removal of residues formed by the additive, for example in the compressed air leading parts, possible without the addition of the additive for this purpose rebuild to have to. Also, various additives can be provided due to a material change.

Die gestellte Aufgabe wird ebenfalls gelöst durch ein Verfahren zur Zuführung eines Additivs in die Druckluftversorgung einer Spinndüse an einer Spinnstelle einer Luftdüsenspinnmaschine mit einem Lieferwalzenpaar und einer Spinndüse dadurch, dass ein flüssiges Additiv in die Druckluftzuleitung zu einer Druckluftversorgung eingedüst wird, wobei das flüssige Additiv mit einer Dosierpumpe vor der Additiveindüsung dosiert wird, die einen Dosierbereich von 0,01 ml bis 1,0 ml pro Minute aufweist.The object is also achieved by a method for supplying an additive in the compressed air supply to a spinneret at a spinning station of an air jet spinning machine with a delivery roller pair and a spinneret in that a liquid additive is injected into the compressed air supply to a compressed air supply, wherein the liquid additive with a Metering is metered before the additive injection, which has a metering range of 0.01 ml to 1.0 ml per minute.

In einer Ausführung kann die Dosiervorrichtung derart gesteuert werden, dass die Zuführung des Additivs abgestimmt auf die momentane Spinnleistung der Spinnstelle vorgenommen wird.In one embodiment, the metering device can be controlled such that the supply of the additive is adjusted in accordance with the instantaneous spinning performance of the spinning station.

Dadurch, dass die Zugabe eines Additivs an einer Spinnstelle unabhängig von anderen Spinnstellen ist, kann eine Luftdüsenspinnmaschine mit einer einzigen oder auch mehreren Spinnstellen mit entsprechenden Mittel zur Zuführung eines Additivs ausgerüstet sein.By virtue of the fact that the addition of an additive at a spinning station is independent of other spinning stations, an air jet spinning machine with a single or several spinning stations can be equipped with appropriate means for supplying an additive.

In einer bevorzugten Ausführung einer Luftdüsenspinnmaschine ist eine Umschaltung zwischen der Zuführung von unterschiedlichen Additiven oder unterschiedlichen Mitteln zur Zuführung des Additivs an den Faserverband an einer einzigen Spinnstelle oder unterschiedlichen Spinnstellen vorgesehen. In dieser Ausführung ist es möglich beispielsweise unterschiedliche Additive an verschiedenen Stellen dem Faserverband zuzuführen. Dies kann vorteilhaft sein, wenn die Additive nacheinander oder abwechslungsweise zugeführt werden müssen, aber eine sehr rasche Abfolge der Umschaltungen erreicht werden soll.In a preferred embodiment of an air jet spinning machine, a switching between the supply of different additives or different means for supplying the additive to the fiber structure at a single spinning station or different spinning stations is provided. In this embodiment, it is possible, for example, to supply different additives at different points to the fiber structure. This can be advantageous if the additives have to be supplied in succession or alternately, but a very rapid sequence of switching is to be achieved.

Im Folgenden wird die Erfindung anhand von einer beispielhaften Ausführungsform erklärt und durch Figur 1 näher erläutert.In the following the invention will be explained with reference to an exemplary embodiment and by FIG. 1 explained in more detail.

Figur 1 zeigt in schematischer Darstellung eine Spinnstelle 1 einer Luftdüsenspinnmaschine. Die dargestellte Spinnstelle 1 weist eine Spinndüse 5 und ein Lieferwalzenpaar 4 auf. Die Spinndüse 5 weist ein Gehäuse 6 und ein zumindest teilweise im Gehäuse 6 befindliches Garnbildungselement 7 mit einem Garnführungskanal 8. Das Gehäuse 6 wird gegenüber dem Lieferwalzenpaar 2 durchdrungen von einem Faserführungselement 9. FIG. 1 shows a schematic representation of a spinning station 1 of an air jet spinning machine. The spinning station 1 shown has a spinneret 5 and a pair of delivery rollers 4. The spinneret 5 has a housing 6 and a Garnbildungselement 7 located at least partially in the housing 6 with a Garnführungskanal 8. The housing 6 is opposite to the delivery roller pair 2 penetrated by a fiber guide element. 9

Von einer Druckluftquelle 10 wird die Spinnstelle 1 über eine Druckluftzuleitung 11 mit Druckluft versorgt. Von der Druckluftzuleitung 11 gelangt die Druckluft über die Druckluftversorgung 12 zu den Drucklufteindüsungen 13. Die Drucklufteindüsungen 13 sind derart angeordnet, dass die durch sie in den Spinndüseninnraum 20 gelangende Druckluft eine rotierende Wirbelströmung 14 an der Spitze des Garnbildungselements 7 erzeugt wird.From a compressed air source 10, the spinning station 1 is supplied via a compressed air supply line 11 with compressed air. From the compressed air supply line 11, the compressed air via the compressed air supply 12 to the compressed air injections 13. The compressed air injections 13 are arranged such that the passing through them in the Spinndüseninnraum 20 compressed air, a rotating vortex flow 14 is generated at the top of Garnbildungselements 7.

Der Faserverband 2 wird durch das Lieferwalzenpaar 4 der Spinndüse 5 zugeführt. Der Faserverband 2 wird durch das Faserführungselement 9 in den Spinndüseninnenraum 20 geführt. Nach Eintritt des Faserverbandes 2 in den Spinndüseninnenraum 20 werden durch die Wirbelströmung 14 einzelne außenliegende Fasern 15 aus dem Faserverband 2 herausgelöst. Da die einzelnen Fasern 15 mit ihrem einen Ende vom Garnbildungselement 7 erfasst werden, wird das andere Ende der einzelnen Fasern 15 um die Spitze des Garnbildungselements 7 umgeschlagen und in der Folge um die nicht beeinflussten innenliegenden Fasern des Faserverbandes 2 herumgewunden. Das so entstandene Garn 3 wird durch einen im Inneren des Garnbildungselements 7 angeordneten Garnführungskanal 8 aus der Spinndüse 5 ausgetragen.The fiber structure 2 is fed through the delivery roller pair 4 of the spinneret 5. The fiber structure 2 is guided by the fiber guide element 9 into the spinneret interior 20. After the fiber structure 2 has entered the spinneret interior 20, individual outward fibers 15 are removed from the fiber structure 2 by the turbulence flow 14. Since the individual fibers 15 are grasped by one end of the yarn formation element 7, the other end of the individual fibers 15 is turned over the tip of the yarn formation element 7 and subsequently wound around the unaffected internal fibers of the fiber structure 2. The resulting yarn 3 is discharged from the spinneret 5 through a yarn guide channel 8 disposed inside the yarn forming member 7.

Das Lieferwalzenpaar 4 kann mit dem Auslaufwalzenpaar eines vorgelagerten Streckwerkes (nicht dargestellt) identisch sein. Ebenfalls kann am Austritt der Spinndüse 5 ein Austragswalzenpaar (nicht dargestellt) angeordnet sein.The delivery roller pair 4 may be identical to the delivery roller pair of an upstream drafting system (not shown). Also, at the outlet of the spinneret 5, a Austragswalzenpaar (not shown) may be arranged.

In der Druckluftzuleitung 11 ist eine Additiveindüsung 19 vorgesehen. Dabei wird das Additiv von einer Additivversorgung 16 mit einer Dosierpumpe 18 über eine Additivzuführung 17 zur Additiveindüsung 19 transportiert. Durch die an der Additiveindüsung 19 vorbeiströmende Druckluft wird das Additiv in Richtung der Druckluftversorgung 12 mitgeschleppt und durch diese in die Drucklufteindüsungen 13 verteilt. Das durch die Drucklufteindüsungen 13 in den Spinndüseninnenraum 20 eingebrachte Additiv wird durch die im Spinndüseninnenraum 20 herrschende Wirbelströmung 14 an den Verunreinigten Oberflächen des Garnbildungselementes 7 und des Spinndüseninnenraumes 20 entlang geführt.In the compressed air supply line 11 an additive injection 19 is provided. In this case, the additive is transported by an additive supply 16 with a metering pump 18 via an additive feed 17 to the additive injection 19. As a result of the compressed air flowing past the additive injection 19, the additive is entrained in the direction of the compressed air supply 12 and distributed through the latter into the compressed air injections 13. The introduced by the compressed air injections 13 in the spinneret interior 20 additive is characterized by in the spinneret interior 20 prevailing vortex flow 14 at the contaminated surfaces of Garnbildelementes 7 and the spinneret interior 20 along.

Durch die Additivzuführung 17 wird das Additiv zur Additiveindüsung 19 geführt. Die Additiveindüsung 19 ist in ihrer Form, Ausdehnung und Anordnung an die zu dosierende Menge als auch an die verwendete Art des Additivs angepasst. Durch die Dosierpumpe 18 wird die Menge des Additivs wie auch die Zeitdauer einer Additivzugabe geregelt.By the additive supply 17, the additive for Additiveindüsung 19 is performed. The additive injection 19 is adapted in its shape, extent and arrangement to the amount to be metered as well as to the type of additive used. By the metering pump 18, the amount of the additive as well as the time period of an additive addition is regulated.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Spinnstellespinning unit
22
Faserverbandfiber structure
33
Garnyarn
44
LieferwalzenpaarPair of delivery rollers
55
Spinndüsespinneret
66
Gehäusecasing
77
GarnbildungselementGarnbildungselement
88th
Garnführungskanalyarn guide
99
FaserführungselementFiber guide element
1010
DruckluftquelleCompressed air source
1111
DruckluftzuleitungCompressed air supply
1212
DruckluftversorgungAir Supply
1313
DrucklufteindüsungDrucklufteindüsung
1414
Wirbelströmungvortex flow
1515
Einzelne FaserSingle fiber
1616
Additivversorgungadditive supply
1717
Additivzuführungfeed additive
1818
Dosierpumpemetering
1919
AdditiveindüsungAdditiveindüsung
2020
SpinndüseninnenraumSpinnerets interior

Claims (9)

  1. A spinning station (1) of an air-jet spinning machine for spinning a fiber strand (2) into a yarn (3), having a compressed air infeed (11) and a compressed air supply (12), a delivery roller pair (4) and a spinning nozzle (5) comprising a housing (6) with compressed air inlet nozzles (13), a yarn-forming element (7), and a nozzle interior (20), the compressed air supply (12) guiding compressed air to the compressed air inlet nozzles (13), and the fiber strand (2) being fed to the spinning nozzle (5) by means of the delivery roller pair (4) and then a yarn (3) being formed from the fiber strand (2) by the yarn-forming element (7) by means of a vortex flow (14) generated by the compressed air inlet nozzles (13), an infeed of a fluid additive into the compressed air infeed (11) to the compressed air supply (12) by means of metering being provided, characterized in that the metering of the fluid additive comprises a metering pump (18), wherein the metering pump (18) comprises a metering range from 0.01 ml to 1.0 ml per minute.
  2. The spinning station (1) according to claim 1, characterized in that the metering pump (18) is a gear pump.
  3. The spinning station (1) according to claim 1, characterized in that the metering pump (18) is a peristaltic pump.
  4. The spinning station (1) according to claim 1, characterized in that the metering pump (18) is a membrane pump.
  5. The spinning station (1) according to any one of the preceding claims, characterized in that an intermittent metering is provided.
  6. The spinning station (1) according to any one of the preceding claims, characterized in that an the additive infeed (17) comprises a changeover between various additives.
  7. A method for feeding an additive into the compressed air supply (12) of a spinning nozzle (5) on a spinning station (1) of an air-jet spinning machine having a delivery roller pair (4) and a spinning nozzle (5) comprising a housing (6) with compressed air infeed nozzles (13), a yarn-forming element (7), and a nozzle interior (20), the fiber strand (2) being fed to the spinning nozzle (5) by means of the delivery roller pair (4) where a yarn (3) is formed from the fiber strand (2) by the yarn-forming element (7) by means of a vortex flow (14) generated by the compressed air inlet nozzles (13), a fluid additive being injected into the compressed air infeed (11) to a compressed air supply (12) leading the compressed air to the compressed air infeed nozzles (13), characterized in that the fluid additive is metered prior to injecting the additive by means of a metering pump (18) comprising a metering range from 0.01 ml to 1.0 ml per minute.
  8. An air-jet spinning machine, characterized in that at least one spinning station (1) according to any one of the claims 1 through 6 is provided.
  9. The air-jet spinning machine according to claim 8, characterized in that a changeover between the injecting of different fluid additives or different means for infeeding the additive to the fiber strand (2) is provided at one single or at different spinning stations (1).
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CH18862013 2013-11-12

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JP2017002431A (en) * 2015-06-11 2017-01-05 村田機械株式会社 Spinning machine and spinning method
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CN103981606B (en) 2018-07-10
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JP2014152438A (en) 2014-08-25

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