EP2767625A1 - Spinning unit of a spinning machine - Google Patents

Spinning unit of a spinning machine Download PDF

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Publication number
EP2767625A1
EP2767625A1 EP14154817.2A EP14154817A EP2767625A1 EP 2767625 A1 EP2767625 A1 EP 2767625A1 EP 14154817 A EP14154817 A EP 14154817A EP 2767625 A1 EP2767625 A1 EP 2767625A1
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EP
European Patent Office
Prior art keywords
compressed air
additive
spinning
spinneret
yarn
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.)
Granted
Application number
EP14154817.2A
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German (de)
French (fr)
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EP2767625B1 (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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Publication date
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, a pair of delivery rollers and a spinneret, wherein the spinneret has a housing with a compressed air injection, 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 injection from the fiber structure.
  • Air jet spinning machines with appropriately equipped spinning stations 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 a vortex air flow generated by a compressed air injection 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 involves 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 separated individual outer fibers and are folded 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.
  • 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, a pair of delivery rollers and a spinneret, wherein the spinneret has a housing with a compressed air injection, a Garn Strukturselement and a nozzle interior.
  • the fiber structure is fed to the delivery roller pair of the spinneret. Subsequently, by the Garn Strukturselement with a on the compressed air injection generated vortex flow from the fiber structure formed a yarn.
  • 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 delivery roller pair and a spinneret.
  • the delivery roller pair may correspond to the pair of output rollers of this drafting system in the presence of a drafting system.
  • an additional delivery roller pair for feeding the fiber structure to the spinneret has a yarn-forming element, which is arranged in a housing.
  • About compressed air injections provided in the housing compressed air in the spinneret interior brought in.
  • 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, a nozzle shape or a wider outlet opening is 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.
  • the metering pump has a metering range of 0.1 ml to 7.0 ml per minute. Particularly preferred is a metering range of 0.5 ml to 1.5 ml per minute.
  • the metering pump has a metering range of 0.1 g to 7.0 g per minute. Particularly preferred is a metering range of 0.5 g to 1.5 g per minute.
  • 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 a 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 has a metering range of 0.01 ml to 1.0 ml per minute.
  • an interval cleaning with a higher dosage of up to 7.0 ml per minute.
  • the intervals to be carried out depend on the degree of soiling of the yarn-forming element and can vary from once a day to several times an hour. The interval duration depends on the necessary cleaning effort and can be from fractions of a second to several seconds.
  • a metering pump which can be used for cleaning and influencing the yarn advantageously has a metering range for liquids of 0.01 ml to 7.0 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 produced yarn 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 with 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, is possible without the addition of the additive for this purpose to convert 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 pair of delivery rollers and a spinneret in that an additive is injected into the compressed air supply to a compressed air supply, wherein the additive with a metering before the additive injection is metered.
  • the metering device is controlled such that a cleaning of the Garn Struktursijns and the Spinndüseninnenraumes takes place by the supplied additive.
  • the metering device can be controlled such that the supply of the additive is adjusted to 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 outwardly lying 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 guided by the prevailing in the spinneret interior 20 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

The spinning station (1) has a spinning nozzle (5) with a housing (6), a yarn formation element (7) and a nozzle inner space (20). The spinning nozzle is provided for supplying fiber composite (2) to a pair of delivery roller (4). The vortex flow is generated through pressurized air injection (13) by the yarn formation element, such that a yarn (3) is formed from the fiber composite. A metering pump (18) is provided for conveying an additive supply with a dosage containing dosage of additive into a compressed air supply line (11) for a compressed air feed circuit (12). An independent claim is included for a method for supplying additive into compressed air feed circuit of spinning nozzle at spinning location of air jet spinning machine.

Description

Die Erfindung betrifft eine Spinnstelle einer Luftdüsenspinnmaschine zum Verspinnen eines Faserverbandes zu einem Garn. Die Spinnstelle weist eine Druckluftzuführung, ein Lieferwalzenpaar und eine Spinndüse auf, wobei die Spinndüse ein Gehäuse mit einer Drucklufteindüsung, ein Garnbildungselement und einen Düseninnenraum aufweist. Der Faserverband wird mit dem Lieferwalzenpaar der Spinndüse zugeführt. Anschliessend wird durch das Garnbildungselement mit einer über die Drucklufteindüsung 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, a pair of delivery rollers and a spinneret, wherein the spinneret has a housing with a compressed air injection, 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 injection 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 eine Drucklufteindüsung 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 a vortex air flow generated by a compressed air injection 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 involves 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 separated individual outer fibers and are folded 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. A regular cleaning of the affected surfaces is necessary 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.

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 Druckluftzuführung, ein Lieferwalzenpaar und eine Spinndüse auf, wobei die Spinndüse ein Gehäuse mit einer Drucklufteindüsung, ein Garnbildungselement und einen Düseninnenraum aufweist. Der Faserverband wird mit dem Lieferwalzenpaar der Spinndüse zugeführt. Anschliessend wird durch das Garnbildungselement mit einer über die Drucklufteindüsung erzeugten Wirbelströmung aus dem Faserverband ein Garn gebildet. Es ist eine Zuführung eines Additivs in die Druckluftversorgung mit einer Dosierung vorgesehen, wobei die Dosierung des Additivs eine Dosierpumpe aufweist.To solve the problem, a novel spinning station is proposed. The spinning station has a compressed air supply, a pair of delivery rollers and a spinneret, wherein the spinneret has a housing with a compressed air injection, a Garnbildungselement and a nozzle interior. The fiber structure is fed to the delivery roller pair of the spinneret. Subsequently, by the Garnbildungselement with a on the compressed air injection generated vortex flow from the fiber structure formed a yarn. There is provided a supply of an additive in the compressed air supply with a dosage, wherein the dosage of the additive comprises a metering pump.

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 delivery roller pair and a spinneret. 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. About compressed air injections provided in the housing compressed air in the spinneret interior brought in. 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, a nozzle shape or a wider outlet opening is 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.

Für die Zugabe von flüssigen Additiven zu Reinigungszwecken, hat es sich als vorteilhaft erwiesen, wenn die Dosierpumpe einen Dosierbereich von 0.1 ml bis 7.0 ml pro Minute aufweist. Besonders bevorzugt ist ein Dosierbereich von 0.5 ml bis 1.5 ml pro Minute. Für die Zugabe von Feststoffpartikeln als Additive zu Reinigungszwecken, hat es sich als vorteilhaft erwiesen, wenn die Dosierpumpe einen Dosierbereich von 0.1 g bis 7.0 g pro Minute aufweist. Besonders bevorzugt ist ein Dosierbereich von 0.5 g bis 1.5 g pro Minute.For the addition of liquid additives for cleaning purposes, it has proved to be advantageous if the metering pump has a metering range of 0.1 ml to 7.0 ml per minute. Particularly preferred is a metering range of 0.5 ml to 1.5 ml per minute. For the addition of solid particles as additives for cleaning purposes, it has proved to be advantageous if the metering pump has a metering range of 0.1 g to 7.0 g per minute. Particularly preferred is a metering range of 0.5 g to 1.5 g per minute.

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 a 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, wenn die Dosierpumpe einen Dosierbereich von 0.01 ml bis 1.0 ml pro Minute aufweist. Um neben den verbesserten Garneigenschaften auch eine Reinigung des Garnbildungselementes zu erreichen ist bevorzugterweise eine Intervall-Reinigung mit einer höheren Dosierung von mit bis zu 7.0 ml pro Minute vorzusehen. Die dabei vorzunehmenden Intervalle richten sich nach dem Verschmutzungsgrad des Garnbildungselementes und können von einmal täglich bis mehrmals stündlich variieren. Die Intervalldauer richtet sich nach dem notwendigen Reinigungsaufwand und kann von Bruchteilen einer Sekunde bis zu mehreren Sekunden betragen.For the addition of liquid additives, in particular for improving the yarn properties, it has proved to be advantageous if the metering pump has a metering range of 0.01 ml to 1.0 ml per minute. In order to achieve a cleaning of the yarn formation element in addition to the improved yarn properties, it is preferable to provide an interval cleaning with a higher dosage of up to 7.0 ml per minute. The intervals to be carried out depend on the degree of soiling of the yarn-forming element and can vary from once a day to several times an hour. The interval duration depends on the necessary cleaning effort and can be from fractions of a second to several seconds.

Eine für die Reinigung und die Garnbeeinflussung einsetzbare Dosierpumpe weist demnach vorteilhafterweise einen Dosierbereich für Flüssigkeiten von 0.01 ml bis 7.0 ml pro Minute auf.Accordingly, a metering pump which can be used for cleaning and influencing the yarn advantageously has a metering range for liquids of 0.01 ml to 7.0 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 produced yarn 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 with 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, is possible without the addition of the additive for this purpose to convert 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 Additiv in die Druckluftzuleitung zu einer Druckluftversorgung eingedüst wird, wobei das Additiv mit einer Dosierpumpe vor der Additiveindüsung dosiert wird.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 pair of delivery rollers and a spinneret in that an additive is injected into the compressed air supply to a compressed air supply, wherein the additive with a metering before the additive injection is metered.

In einer ersten Ausführung des Verfahrens wird die Dosiervorrichtung derart gesteuert, dass durch das zugeführte Additiv eine Reinigung des Garnbildungselementes und des Spinndüseninnenraumes erfolgt. In einer weitergehenden Ausführung kann die Dosiervorrichtung derart gesteuert werden, dass die Zuführung des Additivs abgestimmt auf die momentane Spinnleistung der Spinnstelle vorgenommen wird.In a first embodiment of the method, the metering device is controlled such that a cleaning of the Garnbildungselementes and the Spinndüseninnenraumes takes place by the supplied additive. In a further embodiment, the metering device can be controlled such that the supply of the additive is adjusted to 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 entry of the fiber structure 2 into the spinning nozzle interior 20, individual outwardly lying 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 guided by the prevailing in the spinneret interior 20 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 (12)

Spinnstelle (1) einer Luftdüsenspinnmaschine zum Verspinnen eines Faserverbandes (2) zu einem Garn (3), mit einer Druckluftzuführung (11) und einer Druckluftversorgung (12), einem Lieferwalzenpaar (4) und einer Spinndüse (5), welche ein Gehäuse (6) mit einer Drucklufteindüsung (13), ein Garnbildungselement (7) und einen Düseninnenraum (20) aufweist, wobei der Faserverband (2) mit dem Lieferwalzenpaar (4) der Spinndüse (5) zugeführt wird und anschliessend durch das Garnbildungselement (7) mit einer über die Drucklufteindüsung (13) erzeugten Wirbelströmung (14) aus dem Faserverband (2) ein Garn (3) gebildet wird, dadurch gekennzeichnet, dass eine Zuführung eines Additivs in die Druckluftzuleitung (11) zur Druckluftversorgung (12) mit einer Dosierung vorgesehen ist, wobei die Dosierung des Additivs eine Dosierpumpe (18) aufweist.Spinning station (1) of an air jet spinning machine for spinning a fiber structure (2) into a yarn (3), with a compressed air supply (11) and a compressed air supply (12), a delivery roller pair (4) and a spinneret (5), which has a housing (6 ) having a compressed air injection (13), a Garnbildungselement (7) and a nozzle interior (20), wherein the fiber strand (2) with the delivery roller pair (4) of the spinneret (5) is fed and then through the Garnbildungselement (7) with a formed by the compressed air injection (13) vortex flow (14) from the fiber structure (2) is a yarn (3), characterized in that a supply of an additive in the compressed air supply line (11) to the compressed air supply (12) is provided with a dosage, wherein the dosage of the additive comprises a metering pump (18). Spinnstelle (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Dosierpumpe (18) eine Zahnradpumpe ist.Spinning station (1) according to claim 1, characterized in that the metering pump (18) is a gear pump. Spinnstelle (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Dosierpumpe (18) eine Schlauchquetschpumpe ist.Spinning station (1) according to claim 1, characterized in that the metering pump (18) is a peristaltic pump. Spinnstelle (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Dosierpumpe (18) eine Membranpumpe ist.Spinning station (1) according to claim 1, characterized in that the metering pump (18) is a diaphragm pump. Spinnstelle (1) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Dosierpumpe (18) einen Dosierbereich für Flüssigkeiten von 0.01 bis 7.0 ml/min aufweist.Spinning station (1) according to one of claims 2 to 4, characterized in that the metering pump (18) has a metering range for liquids of 0.01 to 7.0 ml / min. Spinnstelle (1) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Dosierpumpe (18) einen Dosierbereich für Feststoffpartikel von 0.1 bis 7.0 g/min aufweist.Spinning station (1) according to one of claims 2 to 4, characterized in that the metering pump (18) has a metering range for solid particles of 0.1 to 7.0 g / min. Spinnstelle (1) nach mindestens einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass eine intermittierende Dosierung vorgesehen ist.Spinning station (1) according to at least one of the preceding claims, characterized in that an intermittent metering is provided. Spinnstelle (1) nach mindestens einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Additivzuführung (17) eine Umschaltung zwischen verschiedenen Additiven aufweist.Spinning station (1) according to at least one of the preceding claims, characterized in that the additive supply (17) has a switching between different additives. Verfahren zur Zuführung eines Additivs in die Druckluftversorgung (12) einer Spinndüse (5) an einer Spinnstelle (1) einer Luftdüsenspinnmaschine mit einem Lieferwalzenpaar (4) und einer Spinndüse (5), welche ein Gehäuse (6) mit einer Drucklufteindüsung (13), ein Garnbildungselement (7) und einen Düseninnenraum (20) aufweist, wobei der Faserverband (2) mit dem Lieferwalzenpaar (4) der Spinndüse (5) zugeführt wird, wo durch das Garnbildungselement (7) mit der Hilfe von einer über die Drucklufteindüsung (13) erzeugten Wirbelströmung (14) aus dem Faserverband (2) ein Garn (3) gebildet wird, dadurch gekennzeichnet, dass ein Additiv in die Druckluftzuleitung (11) zu einer Druckluftversorgung (12) eingedüst wird, wobei das Additiv mit einer Dosierpumpe (18) vor der Additiveindüsung (19) dosiert wird.Method for feeding an additive into the compressed air supply (12) of a spinneret (5) at a spinning station (1) of an air jet spinning machine with a delivery roller pair (4) and a spinneret (5) having a housing (6) with a compressed air injection (13), a Garnbildungselement (7) and a nozzle interior (20), wherein the fiber strand (2) with the pair of delivery rollers (4) of the spinneret (5) is supplied, where by the Garnbildungselement (7) with the help of a via the compressed air injection (13 ) produced a yarn (3), characterized in that an additive in the compressed air supply line (11) to a compressed air supply (12) is injected, wherein the additive with a metering pump (18) before the Additiveindüsung (19) is metered. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass Dosierpumpe (18) derart gesteuert wird, dass durch das eingedüste Additiv eine Reinigung des Garnbildungselements (7) und des Spinndüseninnenraumes (20) erfolgt.A method according to claim 9, characterized in that the metering pump (18) is controlled such that a cleaning of the Garnbildelements (7) and the Spinndüseninnenraumes (20) takes place by the injected additive. Luftdüsenspinnmaschine, dadurch gekennzeichnet, dass zumindest eine Spinnstelle (1) nach einem der Ansprüche 1 bis 8 vorgesehen ist.Air jet spinning machine, characterized in that at least one spinning station (1) according to one of claims 1 to 8 is provided. Luftdüsenspinnmaschine nach Anspruch 11, dadurch gekennzeichnet, dass eine Umschaltung zwischen der Eindüsung von unterschiedlichen Additiven oder unterschiedlichen Additiveindüsungen in die Druckluftversorgung (11) an einer einzigen oder unterschiedlichen Spinnstellen (1) vorgesehen ist.Air jet spinning machine according to claim 11, characterized in that a switching between the injection of different additives or different Additiveindüsungen in the compressed air supply (11) at a single or different spinning stations (1) is provided.
EP14154817.2A 2013-02-13 2014-02-12 Spinning unit of a spinning machine Not-in-force EP2767625B1 (en)

Applications Claiming Priority (2)

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CH00445/13A CH707561A1 (en) 2013-02-13 2013-02-13 Spinning station of air jet spinning machine for spinning fiber strand into yarn, has pressurized air supply circuit with pressurized air supply line that supply the additive with dosage pumped by metering pump
CH18862013 2013-11-12

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JP2014152438A (en) 2014-08-25
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