EP2730685B1 - Yarn forming element for an air jet spinning machine with an insert and spindle equipped with the same - Google Patents
Yarn forming element for an air jet spinning machine with an insert and spindle equipped with the same Download PDFInfo
- Publication number
- EP2730685B1 EP2730685B1 EP13189333.1A EP13189333A EP2730685B1 EP 2730685 B1 EP2730685 B1 EP 2730685B1 EP 13189333 A EP13189333 A EP 13189333A EP 2730685 B1 EP2730685 B1 EP 2730685B1
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- European Patent Office
- Prior art keywords
- yarn
- air
- inset
- spinning
- panels
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- 238000010042 air jet spinning Methods 0.000 title claims 6
- 238000009987 spinning Methods 0.000 claims description 82
- 239000000835 fiber Substances 0.000 claims description 20
- 125000006850 spacer group Chemical group 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
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Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
-
- 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
Definitions
- the present invention relates to a yarn-forming member for an air-spinning machine, which serves to produce a yarn from a fiber structure by means of an air flow, wherein the yarn-forming element has a spinning tip with an inlet opening surrounded by an outer surface of the spinning tip, in the region thereof by means of the air flow a Garn is producible, and wherein the Garn avoirselement has an inner insert with an adjoining the inlet port discharge channel for the yarn and a plurality of laterally branching off the discharge duct air outlet openings, so that introduced against a spin direction in the discharge duct air flow partially through the air outlet openings and partially can escape through the inlet opening.
- a spinneret of an air-spinning machine which serves to produce a yarn from a fiber structure by means of an air flow, the spinneret having a vortex chamber partially surrounded vortex chamber with an inlet port for a fiber strand and at least partially extending into the vortex chamber
- Garn avoirselement in which the swirl chamber is associated with air nozzles directed towards an outer surface of the yarn formation element, via which air can be conducted into the swirl chamber in order to impart rotation to the fiber structure in the region of an inlet opening of the yarn formation element, and wherein the yarn formation element has a discharge channel adjoining the inlet opening over which the yarn is peelable from the vortex chamber in a spinning direction.
- an insert for a Garn Strukturselement a corresponding air spinning machine is described, which serves to produce a yarn from a fiber strand by means of an air flow, the insert has a discharge channel for the yarn and a plurality of laterally branching off the exhaust duct air outlet openings, so that one against a spinning direction can be partially vented through the air outlet openings in the extraction duct introduced air flow.
- a generic Garn Strukturselement is for example from the DE 10 2009 034 206 A1 known.
- the Garnticianselement has a to a Garnabzugskanal connected exhaust port for the partial removal of air, during a piecing process (in which the yarn end with Help the air against the actual spinning direction to be performed through the trigger channel) is introduced into the Garnabzugskanal.
- the partial removal of the air ensures that only a part of the air flow, which is introduced during the piecing in the discharge duct, must escape via the inlet opening of the Garn avoirselements.
- the air flow (which is introduced into the exhaust duct, for example with the aid of an injection nozzle opening into the exhaust duct) is divided into two partial air streams in the region of the inlet opening, a first partial air stream leaving the exhaust duct via the exhaust air opening located in the region of the inlet opening, while second partial air flow enters the vortex chamber surrounding the yarn formation element via the inlet opening and in this case brings about the return of the yarn end desired during the piecing process.
- the reason for the division of the supplied air is the fact that the region of the inlet opening has a smaller inner diameter than the downstream in the spin direction hood.
- the yarn end is conveyed into the vortex chamber and ultimately via an inlet mouth of the vortex chamber into the area in front of the spinneret having the vortex chamber. There it is associated with a fiber structure in connection and returned together with this in the vortex chamber in which finally the actual spinning process can be continued.
- a disadvantage of the described solution is the fact that the exiting through the exhaust air flow inevitably also in the vortex chamber passes and there can produce an unfavorable for the return of the yarn end air flow.
- a method for influencing the forming in the spindle channel of a spindle during the eddy current air spinning airflow is described by flow-active connection of the spindle channel with the air duct.
- the method is characterized in that the influencing of the air stream forming in the spindle channel is realized in such a way that no fluid emerges from the inlet opening of the spindle channel.
- the US 6,029,435 A also describes a yarn formation element in the form of a spindle.
- the spindle has a central region through which air can escape laterally from the discharge channel to facilitate the piecing process.
- the extracted air can be regulated by means of a valve, so that certain flow conditions can be realized.
- the object of the present invention is therefore to propose a yarn-forming element as well as a spinneret equipped therewith which takes this disadvantage into account.
- the Garnticianselement has an inner insert with a subsequent to the inlet opening discharge channel for the yarn and a plurality of laterally branching off the discharge duct air outlet openings.
- the air outlet openings in an area which is at least partially surrounded by a wall of the spinning tip.
- a introduced against the spin direction in the flue duct air flow is thus - as in the above-described prior art - while also split during a piecing, so that during a piecing process (for example with the aid of an injection nozzle) introduced into the flue duct air partially through the air outlet openings and partially escape via the inlet opening.
- the spinning tip can have a (for example cylindrical) wall section, which adjoins a generally conical tip region in which the inlet opening is located.
- the wall section advantageously surrounds the insert according to the invention (at least partially) and thus represents a spatial barrier for the air emerging from the air outlet openings.
- the yarn formation element is finally installed in a spinneret of an air spinning machine such that the wall section, possibly together with another wall section of the Spinneret, limited to a chamber that surrounds the insert. If the chamber finally communicates with a corresponding air discharge channel, the air escaping via the air outlet openings can be removed from the spinneret via the chamber and finally via the air discharge channel without the air having to pass through the vortex chamber.
- the yarn-forming element according to the invention enables a yarn end to be returned particularly reliably, since the return-causing air flow (which extends from an injection nozzle via the outlet channel and the inlet mouth into the vortex chamber) is not influenced by the air flow passing over the outlet channel leaves the air outlet openings.
- the use comprises a plurality of mutually adjacent diaphragms, each with an opening, which together define a part of the discharge channel.
- the part of the discharge channel which runs within the insert, is composed of the individual apertures of the respective apertures, it being pointed out in this connection that the withdrawal channel does not have to have a continuous channel wall.
- the panels are spaced apart by means of spacers.
- the spacers are in turn to be placed so that the air outlet openings according to the invention are formed by existing between the panels open spaces.
- the panels may, for example, be in the form of disc-shaped bodies which have a preferably central aperture and which are spaced apart by means of spacers relative to adjacent panels, the spacers having dimensions which allow air to escape between two adjacent panels.
- the openings are formed by centrally introduced into the apertures and concentric with each other arranged holes.
- the bores are easy and precise to produce and finally form a circular portion of the discharge channel, which is preferably opposite to the spinning direction in the inlet opening and after installation in a spinneret in the spinning direction in a channel portion of the spinneret housing empties.
- the diameters of at least a majority of the bores decrease in the direction of the spinning tip. This results in gradations, over which the respective outer region of a counter to the spin direction through the outlet channel flowing air flow to a certain extent "peeled off” from the inner air flow and discharged through the corresponding air outlet openings. As a result, in this case, the speed of the central air flow remains constant, since the decreasing diameter in connection with the air outlet opening causes a reduction in the volume flow, but not a deceleration of the central air flow.
- the panels has a running in the longitudinal direction of the discharge duct height, the amount between 0.5 mm and 3.0 mm, preferably between 1.0 mm and 2.0 mm. It is conceivable, for example, to provide the insert with a tip and an end portion facing away from the end, the height of which deviates from the height of the individual intermediate diaphragms. Also, the aperture may have a different height, with the above values have been proven.
- the number of diaphragms is preferably between 3 and 10, preferably between 5 and 7.
- the distance between the spacers, caused by the spacers, of at least a majority of the panels amounts to between 0.2 mm and 2.0 mm, preferably an amount between 0.4 mm and 1.5 mm.
- the distance between all the screens is the same. It is also possible to increase or decrease the distance in the spinning direction.
- the insert has a tip facing the inlet opening, whose longitudinal extension running parallel to the longitudinal axis of the withdrawal channel is greater than the above-mentioned height of a panel. The same applies preferably also for a tip end facing away from the insert.
- the spacers is formed as a respective two adjacent panels interconnecting web, wherein the webs are each placed in a, preferably spaced from the apertures, edge region of the panels.
- the webs may in turn be integrally formed with the panels. It is also conceivable to glue the webs between in each case two adjacent panels or between a panel and the tip of the insert and / or between a panel and the abovementioned end section of the insert. Preferably, more than one web are also arranged between the respective panels in order to increase the stability of the insert.
- the insert has a tip facing the inlet opening, which is connected to an inner surface portion of the spinning tip, preferably glued and / or pressed.
- the tip of the insert thus preferably follows the inner surface structure of the spinning tip and in this case passes directly into the inlet mouth of the yarn formation element or its spinning tip.
- the tip of the insert for this purpose preferably has a conical or frusto-conical outer contour, with which it bears against the correspondingly shaped inner contour of the insert.
- the insert has a, preferably outer, cross-sectional change in its end region remote from the inlet opening, via which it can be connected to an outlet region of a spinneret of the air-spinning machine.
- the cross-sectional change may in this case be present, for example, as an annular cross-sectional tapering or widening, which after installation in a spinneret can be brought into positive connection with a corresponding mating section of the spinneret.
- the countersection also has a corresponding channel section, which adjoins the outlet channel of the insert and forms with it a uniform outlet channel of the spinneret, the change in cross section causes a particularly airtight connection of insert and counterpart section, so that during the spinning or piecing process Pressure losses can be avoided by leakage air.
- the insert is formed integrally and preferably as a die-cast part, which is preferably provided with a surface coating which has a higher wear resistance than the die-cast part.
- the insert can be made of a plastic, which was then finished by an appropriate coating.
- the spinnerette for an air spinning machine according to the invention which serves to produce a yarn from a fiber structure by means of an air flow, is finally characterized by the fact that in the vortex chamber of the spinneret projecting Garn avoirselement has an inner insert according to the previous description, so that one during a piecing process Air flow introduced into the extraction duct in opposite direction to the spinning direction can escape in part via the air outlet openings and partly via the inlet opening.
- the withdrawal channel communicates with at least one injection nozzle, via which an air flow directed counter to the spinning direction can be introduced into the withdrawal channel.
- an air flow can be generated, which extends in the direction indicated by the discharge channel.
- the insert also has the said air outlet openings and also the shutters described, the air flow within the insert is divided into a first and a second air flow, wherein the first air flow leaves the insert via the inlet opening of the spinning tip and the second air flow escape via the air outlet openings can.
- the spinning tip of the Garn upsetselements merges into a, preferably sleeve-shaped, wall which surrounds the insert and together with the spinning tip an inner, the insert receiving chamber of Garnsentelements limited.
- the chamber should also open into at least one Lucasab technologicalkanal the spinneret, so that the proportion of introduced via an injection nozzle air, which is separated via the outlet openings of the insert, the spinneret can rely solely on the chamber and the or the adjoining HeilabGermankanäle.
- a division of an air flow introduced via the at least one injection nozzle takes place such that a first partial air flow via the inlet opening of the spinning tip into the vortex chamber and a second partial air flow via the air outlet openings of the insert into the chamber and from there into the at least an air discharge passage is forcibly guided, without thereby entering the vortex chamber.
- a mixing of the two air streams within the vortex chamber is thus excluded, so that a yarn can be reliably guided against the spinning direction through the spinneret as soon as the injection nozzle (s) is acted upon with compressed air or are.
- the air discharge duct or ducts are either connected to an air removal system arranged outside the spinning station or terminate in an outlet which is placed in the region of the outer surface of the spinneret, so that the exiting air is separated into the space surrounding the spinneret can be.
- the outlet or the air outlet duct or ducts can be provided with a controllable valve in order to close said ducts during the spinning operation and thereby to prevent leakage of leakage air.
- the spinning tip preferably in the region of the inlet opening facing away from the end face is fixed to the wall, wherein the transition between the wall and spinning tip is preferably designed airtight to avoid leakage air flow.
- the spinning tip can for this purpose have a, in particular annular, holding portion which is positively connected to a cap sleeve in operative connection.
- the cap sleeve is in turn connected to said wall and presses the spinning tip in the direction of the same, so that a stable connection of the spinning tip is ensured at the wall having the portion of the spinneret.
- the wall and the nut preferably have corresponding corresponding threads, so that the force with which the spinning tip is pressed against the adjacent wall of the spinneret or an intermediate seal can be adjusted in a simple manner.
- removal or replacement of the spinning tip and / or insert is possible at any time.
- a yarn formation element of an air spinning machine which serves to produce a yarn from a fiber structure by means of an air flow
- the yarn formation element having a spinning tip with an inlet opening surrounded by an outer surface of the spinning tip, in whose region a yarn is produced by means of the air flow can be generated, and wherein the use of a take-off channel for the yarn and a plurality of laterally branching off the discharge duct air outlet openings, so that one opposite to a spinning direction
- the insert comprises a plurality of mutually adjacent diaphragms, each with an opening, which together define a part of the exhaust duct, and that the panels are spaced apart by means of spacers from one another, wherein the air outlet openings are formed by existing between the apertures open spaces.
- FIG. 1 shows a spinneret 31 of an air spinning machine according to the invention (which usually comprises a plurality of corresponding spinnerets 31).
- the spinneret 31 has a housing 32 with an inlet mouth 21 through which a fiber structure 3 (which is supplied, for example, from a spinneret 31 upstream drafting) is conveyed into an interior and surrounded by a Wirbelhuntwandung 19 swirl chamber 20.
- the yarn 2 thus produced finally passes through the inlet opening 6 of the yarn-forming element 1 and is finally drawn off from the spinneret 31 via a discharge channel 8 adjoining the inlet opening 6 (the withdrawal is generally effected with the aid of a discharge device downstream of the spinneret 31 in the spinning direction S, for example, a take-off roller pair).
- the spinneret 31 has one (or more) opening into the discharge channel 8 injection nozzle (s) 23, which is or are in communication with a positive pressure source, not shown. If now the yarn end in the manner described by the spinneret 31 are returned, the injection nozzle 23 is acted upon by an overpressure, so that an air flow is formed which extends against the spinning direction S in the discharge channel 8. In this case, in addition to an air flow to be described in more detail opposite to the spinning direction S, a negative pressure is also created in the outlet region 18 of the spinneret 31, which causes the yarn end to be attracted or sucked in.
- the inlet opening 6 of the spinning tip 4 usually has a smaller diameter than the outlet channel 8 in the region of the injection nozzle 23.
- the inlet opening 6 thus represents a bottleneck, the volume flow of introduced with a certain air pressure on air would limit a certain value that could be too low for the return of the yarn 2 into the area of the swirl chamber 20.
- the yarn formation element 1 now has a plurality of air outlet openings 9, which branch off laterally from the outlet channel 8, the air outlet openings 9 being arranged in the region of an insert 7 of the yarn formation element 1. This can, for example, via a frontal cross-sectional change 17 with a mating portion of the spinneret 31 in contact to create a transition between insert 7 and the adjoining portion of the discharge channel 8.
- the air outlet openings 9 are realized by individual apertures 10, which are held on the side of the discharge channel 8 spacers 12 (which may be present, for example in the form of the webs shown 14) at a distance.
- the diaphragms 10 are preferably of circular design and have central apertures 11 formed, for example as bores 13, which in turn each form or delimit a section of the discharge channel 8.
- the diameter of the apertures 11 of the apertures 10 decrease counter to the spinning direction S.
- the gradations 33 in turn cause always deflected the respective outer part of the air flow and the insert 7 through the air outlet openings 9, which in the case of FIGS. 1 to 4 are formed by the spaces between the apertures 10 leaves.
- the inner, undeflected partial air flow in this case retains its initial speed, since damming up of the introduced air is avoided despite the diameter of the discharge channel 8 decreasing counter to the spinning direction S.
- the result is a central (first) partial air flow, which extends from the injection nozzle 23 via the discharge channel 8 and the inlet opening 6 into the swirl chamber 20 and from there via the inlet mouth 21 into the region in front of the spinneret 31, the speed of which best case remains (almost) constant over the entire distance, so that a reliable return of a yarn end counter to the spinning direction S is made possible.
- the insert 7 is placed inside the spinning tip 4 of Garn avoirselements 1 and fixed with this example in the region of a tip 15 of the insert 7 against an inner surface portion 16 of the spinning tip 4.
- the insert 7 can be designed for this purpose, for example, as a (preferably one-piece) die-cast part and / or glued or pressed to the spinning tip 4.
- the spinning tip 4 is in turn fixed relative to a wall 24 of the spinneret 31 such that a chamber 25 which is closed relative to the swirl chamber 20 is formed, which in turn communicates with one or more air discharge passages 26 (see FIG FIG. 1 ).
- a chamber 25 which is closed relative to the swirl chamber 20 is formed, which in turn communicates with one or more air discharge passages 26 (see FIG FIG. 1 ).
- the air flow separated with the aid of the air outlet opening 9 can escape exclusively via the air discharge duct or ducts 26, so that an influence of the partial air flow entering via the inlet opening 6 into the swirl chamber 20 can be effectively prevented.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Die vorliegende Erfindung betrifft ein Garnbildungselement für eine Luftspinnmaschine, die der Herstellung eines Garns aus einem Faserverband mit Hilfe einer Luftströmung dient, wobei das Garnbildungselement eine Spinnspitze mit einer, von einer äußeren Oberfläche der Spinnspitze umgebenen, Einlassöffnung besitzt, in deren Bereich mit Hilfe der Luftströmung ein Garn erzeugbar ist, und wobei das Garnbildungselement einen inneren Einsatz mit einem sich an die Einlassöffnung anschließenden Abzugskanal für das Garn und mehrere von dem Abzugskanal seitlich abzweigende Luftaustrittsöffnungen besitzt, so dass eine entgegen einer Spinnrichtung in den Abzugskanal eingebrachte Luftströmung teilweise über die Luftaustrittsöffnungen und teilweise über die Einlassöffnung entweichen kann. Darüber hinaus wird eine Spinndüse einer Luftspinnmaschine vorgeschlagen, die der Herstellung eines Garns aus einem Faserverband mit Hilfe einer Luftströmung dient, wobei die Spinndüse eine von einer Wirbelkammerwandung teilweise umgebene Wirbelkammer mit einer Einlaufmündung für einen Faserverband und ein sich zumindest teilweise in die Wirbelkammer erstreckendes Garnbildungselement aufweist, wobei der Wirbelkammer in Richtung einer äußeren Oberfläche des Garnbildungselements ausgerichtete Luftdüsen zugeordnet sind, über die Luft in die Wirbelkammer leitbar ist, um dem Faserverband im Bereich einer Einlassöffnung des Garnbildungselements eine Drehung zu erteilen, und wobei das Garnbildungselement einen an die Einlassöffnung angrenzenden Abzugskanal aufweist, über den das Garn in einer Spinnrichtung aus der Wirbelkammer abziehbar ist. Schließlich wird ein Einsatz für ein Garnbildungselement einer entsprechenden Luftspinnmaschine beschrieben, die der Herstellung eines Garns aus einem Faserverband mit Hilfe einer Luftströmung dient, wobei der Einsatz einen Abzugskanal für das Garn und mehrere von dem Abzugskanal seitlich abzweigende Luftaustrittsöffnungen besitzt, so dass eine entgegen einer Spinnrichtung in den Abzugskanal eingebrachte Luftströmung teilweise über die Luftaustrittsöffnungen entweichen kann. Ein gattungsgemäßes Garnbildungselement ist beispielsweise aus der
Grund für die Aufteilung der zugeführten Luft ist die Tatsache, dass der Bereich der Einlassöffnung einen geringeren Innendurchmesser aufweist als der sich in Spinnrichtung anschließende Abzugskanal. Durch die seitliche Abzweigung des ersten Teilluftstroms im Bereich der Einlassöffnung wird schließlich ein Luftstau im Übergangsbereich zwischen Abzugskanal und Einlassöffnung vermieden und eine gleichmäßig hohe Luftgeschwindigkeit sichergestellt.The reason for the division of the supplied air is the fact that the region of the inlet opening has a smaller inner diameter than the downstream in the spin direction hood. By the lateral branching of the first partial air flow in the region of the inlet opening, an air accumulation in the transitional area between the exhaust duct and the inlet opening is finally avoided and a uniformly high air velocity is ensured.
Mit Hilfe der Luftströmung wird schließlich das Garnende bis in die Wirbelkammer und letztendlich über eine Einlaufmündung der Wirbelkammer in den Bereich vor der die Wirbelkammer aufweisenden Spinndüse gefördert. Dort wird es mit einem Faserverband in Verbindung gebracht und gemeinsam mit diesem in die Wirbelkammer zurückgeführt, in der schließlich der eigentliche Spinnvorgang fortgesetzt werden kann.Finally, with the aid of the air flow, the yarn end is conveyed into the vortex chamber and ultimately via an inlet mouth of the vortex chamber into the area in front of the spinneret having the vortex chamber. There it is associated with a fiber structure in connection and returned together with this in the vortex chamber in which finally the actual spinning process can be continued.
Nachteilig an der beschriebenen Lösung ist die Tatsache, dass der über die Abluftöffnung austretende Luftstrom zwangsläufig ebenfalls in die Wirbelkammer gelangt und dort eine für die Rückführung des Garnendes ungünstige Luftströmung erzeugen kann.A disadvantage of the described solution is the fact that the exiting through the exhaust air flow inevitably also in the vortex chamber passes and there can produce an unfavorable for the return of the yarn end air flow.
In der
Die
Auf ähnliche Weise zeigt auch die
Aufgabe der vorliegenden Erfindung ist es daher, ein Garnbildungselement sowie eine damit ausgerüstete Spinndüse vorzuschlagen, welche diesem Nachteil Rechnung trägt.The object of the present invention is therefore to propose a yarn-forming element as well as a spinneret equipped therewith which takes this disadvantage into account.
Die Aufgabe wird gelöst durch ein Garnbildungselement sowie eine Spinndüse mit den Merkmalen der unabhängigen Patentansprüche.The object is achieved by a Garnbildungselement and a spinneret with the features of the independent claims.
Das Garnbildungselement besitzt einen inneren Einsatz mit einem sich an die Einlassöffnung anschließenden Abzugskanal für das Garn und mehrere von dem Abzugskanal seitlich abzweigende Luftaustrittsöffnungen. Mit anderen Worten befinden sich die Luftaustrittsöffnungen in einem Bereich, der zumindest teilweise von einer Wandung der Spinnspitze umgeben ist.The Garnbildungselement has an inner insert with a subsequent to the inlet opening discharge channel for the yarn and a plurality of laterally branching off the discharge duct air outlet openings. In other words are the air outlet openings in an area which is at least partially surrounded by a wall of the spinning tip.
Eine entgegen der Spinnrichtung in den Abzugskanal eingebrachte Luftströmung wird somit - wie im oben beschriebenen Stand der Technik - zwar ebenfalls während eines Anspinnvorgangs aufgeteilt, so dass die während eines Anspinnvorgangs (beispielsweise mit Hilfe einer Injektionsdüse) in den Abzugskanal eingebrachte Luft teilweise über die Luftaustrittsöffnungen und teilweise über die Einlassöffnung entweichen kann. Im Gegensatz zu den bekannten Lösungen kann jedoch durch die Platzierung des Einsatzes und damit auch der Luftaustrittsöffnungen ausgeschlossen werden, dass die über die Luftaustrittsöffnungen entweichende Luft in die Wirbelkammer (in der während des Spinnbetriebs eine Wirbelluftströmung erzeugt und mit deren Hilfe die eigentliche Garnherstellung erfolgt) gelangt. Vielmehr entweicht lediglich der Teilluftstrom in die Wirbelkammer, der den Abzugskanal über die Einlassöffnung des Garnbildungselements verlässt, wobei dies für die Rückführung eines Garnendes in die Wirbelkammer gewünscht und notwendig ist.A introduced against the spin direction in the flue duct air flow is thus - as in the above-described prior art - while also split during a piecing, so that during a piecing process (for example with the aid of an injection nozzle) introduced into the flue duct air partially through the air outlet openings and partially escape via the inlet opening. In contrast to the known solutions, however, can be ruled out by the placement of the insert and thus the air outlet openings that escaping through the air outlet openings air into the vortex chamber (in the generated during spinning a vortex air flow and with the help of the actual yarn production takes place) passes , Rather, only the partial air flow escapes into the vortex chamber, which leaves the extraction channel via the inlet opening of the Garnbildungselements, which is desired and necessary for the return of a yarn end in the vortex chamber.
Um die vorteilhafte Abschirmung der Luftaustrittsöffnungen zu gewährleisten, kann die Spinnspitze einen (beispielsweise zylindrischen) Wandabschnitt aufweisen, der sich an einen in der Regel kegelförmigen Spitzenbereich, in dem sich die Einlassöffnung befindet, anschließt. Der Wandabschnitt umgibt vorteilhafterweise den erfindungsgemäßen Einsatz (zumindest teilweise) und stellt somit eine räumliche Barriere für die aus den Luftaustrittsöffnungen austretende Luft dar. Vorteilhafterweise wird das Garnbildungselement schließlich derart in eine Spinndüse einer Luftspinnmaschine eingebaut, dass der Wandabschnitt, eventuell gemeinsam mit einem weiteren Wandabschnitt der Spinndüse, eine Kammer begrenzt, die den Einsatz umgibt. Steht die Kammer schließlich mit einem entsprechenden Luftabführkanal in Verbindung, so kann die über die Luftaustrittsöffnungen entweichende Luft über die Kammer und abschließend über den Luftabführkanal aus der Spinndüse abgeführt werden, ohne dass die Luft die Wirbelkammer passieren muss bzw. kann.In order to ensure the advantageous shielding of the air outlet openings, the spinning tip can have a (for example cylindrical) wall section, which adjoins a generally conical tip region in which the inlet opening is located. The wall section advantageously surrounds the insert according to the invention (at least partially) and thus represents a spatial barrier for the air emerging from the air outlet openings. Advantageously, the yarn formation element is finally installed in a spinneret of an air spinning machine such that the wall section, possibly together with another wall section of the Spinneret, limited to a chamber that surrounds the insert. If the chamber finally communicates with a corresponding air discharge channel, the air escaping via the air outlet openings can be removed from the spinneret via the chamber and finally via the air discharge channel without the air having to pass through the vortex chamber.
Im Ergebnis ermöglicht das erfindungsgemäße Garnbildungselement während eines Anspinnvorgangs eine besonders zuverlässige Rückführung eines Garnendes, da der die Rückführung bewirkende Luftstrom (der sich von einer Injektionsdüse über den Abzugskanal und die Einlassmündung in die Wirbelkammer erstreckt) nicht von dem Luftstrom beeinflusst wird, der den Abzugskanal über die Luftaustrittsöffnungen verlässt.As a result, during a piecing operation, the yarn-forming element according to the invention enables a yarn end to be returned particularly reliably, since the return-causing air flow (which extends from an injection nozzle via the outlet channel and the inlet mouth into the vortex chamber) is not influenced by the air flow passing over the outlet channel leaves the air outlet openings.
Darüber hinaus umfasst der Einsatz mehrere zueinander benachbarte Blenden mit jeweils einer Durchbrechung, die gemeinsam einen Teil des Abzugskanals begrenzen. Mit anderen Worten setzt sich der Teil des Abzugskanals, der innerhalb des Einsatzes verläuft, aus den einzelnen Durchbrechungen der jeweiligen Blenden zusammen, wobei in diesem Zusammenhang darauf hingewiesen sei, dass der Abzugskanal keine durchgängige Kanalwand aufweisen muss. Vielmehr sind die Blenden mit Hilfe von Abstandshaltern voneinander beabstandet. Die Abstandshalter sind wiederum so zu platzieren, dass die erfindungsgemäßen Luftaustrittsöffnungen durch zwischen den Blenden vorhandene Freiräume gebildet werden. Hierfür können die Blenden beispielsweise als scheibenförmige Körper vorliegen, die eine, vorzugsweise mittige, Durchbrechung aufweisen und die mit Hilfe von Abstandshaltern gegenüber entsprechend benachbarten Blenden auf Abstand gehalten werden, wobei die Abstandshalter Abmessungen besitzen, die einen Austritt von Luft zwischen zwei benachbarten Blenden erlauben.In addition, the use comprises a plurality of mutually adjacent diaphragms, each with an opening, which together define a part of the discharge channel. In other words, the part of the discharge channel, which runs within the insert, is composed of the individual apertures of the respective apertures, it being pointed out in this connection that the withdrawal channel does not have to have a continuous channel wall. Rather, the panels are spaced apart by means of spacers. The spacers are in turn to be placed so that the air outlet openings according to the invention are formed by existing between the panels open spaces. For this purpose, the panels may, for example, be in the form of disc-shaped bodies which have a preferably central aperture and which are spaced apart by means of spacers relative to adjacent panels, the spacers having dimensions which allow air to escape between two adjacent panels.
Ebenso ist es vorteilhaft, wenn die Durchbrechungen durch mittig in die Blenden eingebrachte und konzentrisch zueinander angeordneten Bohrungen gebildet werden. Die Bohrungen sind leicht und präzise herstellbar und bilden schließlich einen kreisrunden Teilbereich des Abzugskanals, der vorzugsweise entgegen der Spinnrichtung in die Einlassöffnung und nach Einbau in eine Spinndüse in Spinnrichtung in einen Kanalabschnitt des Spinndüsengehäuses mündet.Likewise, it is advantageous if the openings are formed by centrally introduced into the apertures and concentric with each other arranged holes. The bores are easy and precise to produce and finally form a circular portion of the discharge channel, which is preferably opposite to the spinning direction in the inlet opening and after installation in a spinneret in the spinning direction in a channel portion of the spinneret housing empties.
Auch ist es äußert vorteilhaft, wenn die Durchmesser zumindest eines Großteils der Bohrungen in die der Spinnspitze zugewandten Richtung abnehmen. Hierdurch entstehen Abstufungen, über die der jeweils äußere Bereich einer entgegen der Spinnrichtung durch den Abzugskanal strömenden Luftströmung gewissermaßen von der inneren Luftströmung "abgeschält" und über die entsprechenden Luftaustrittsöffnungen abgeführt wird. Im Ergebnis bleibt hierbei die Geschwindigkeit der mittigen Luftströmung konstant, da der abnehmende Durchmesser in Verbindung mit den Luftaustrittsöffnung zwar eine Verringerung des Volumenstroms, nicht aber ein Abbremsen der mittigen Luftströmung bewirkt. Auf diese Weise wird schließlich sichergestellt, dass die Luftgeschwindigkeit im Inneren einer in den Abzugskanal eingebrachten Luftströmung über die gesamte Länge des Abzugskanals eine Geschwindigkeit aufweist, die hoch genug ist, um ein Garnende entgegen der Spinnrichtung durch den Abzugskanal und schließlich auch die Einlassöffnung der Spinnspitze zu führen.It is also extremely advantageous if the diameters of at least a majority of the bores decrease in the direction of the spinning tip. This results in gradations, over which the respective outer region of a counter to the spin direction through the outlet channel flowing air flow to a certain extent "peeled off" from the inner air flow and discharged through the corresponding air outlet openings. As a result, in this case, the speed of the central air flow remains constant, since the decreasing diameter in connection with the air outlet opening causes a reduction in the volume flow, but not a deceleration of the central air flow. In this way, it is finally ensured that the air velocity in the interior of an air flow introduced into the draft channel over the entire length of the flue has a speed high enough to approach one end of the yarn against the direction of spinning through the flue and finally the inlet of the spinning tip to lead.
Vorteile bringt es zudem mit sich, wenn zumindest ein Großteil der Blenden eine in Längsrichtung des Abzugskanals verlaufende Höhe aufweist, deren Betrag zwischen 0,5 mm und 3,0 mm, vorzugsweise zwischen 1,0 mm und 2,0 mm, liegt. Denkbar ist beispielsweise, den Einsatz mit einer Spitze und einem der Spitze abgewandten Endabschnitt zu versehen, deren Höhe von der Höhe der einzelnen dazwischenliegenden Blenden abweicht. Auch können die Blenden eine unterschiedliche Höhe aufweisen, wobei sich die obigen Werte bewährt haben. Die Anzahl der Blenden liegt vorzugsweise zwischen 3 und 10, vorzugsweise zwischen 5 und 7.It also brings benefits when at least a majority of the panels has a running in the longitudinal direction of the discharge duct height, the amount between 0.5 mm and 3.0 mm, preferably between 1.0 mm and 2.0 mm. It is conceivable, for example, to provide the insert with a tip and an end portion facing away from the end, the height of which deviates from the height of the individual intermediate diaphragms. Also, the aperture may have a different height, with the above values have been proven. The number of diaphragms is preferably between 3 and 10, preferably between 5 and 7.
Besondere Vorteile bringt es mit sich, wenn der durch die Abstandshalter bewirkte gegenseitige Abstand zumindest eines Großteils der Blenden einen Betrag zwischen 0,2 mm und 2,0 mm, vorzugsweise einen Betrag zwischen 0,4 mm und 1,5 mm, aufweist. Generell ist es denkbar, dass der Abstand zwischen allen Blenden gleich ist. Möglich ist ebenso ein in Spinnrichtung zu- oder abnehmender Abstand. Ferner wird bevorzugt, dass der Einsatz eine der Einlassöffnung zugewandte Spitze aufweist, deren parallel zur Längsachse des Abzugskanals verlaufende Längserstreckung größer ist als die oben genannte Höhe einer Blende. Gleiches gilt vorzugsweise auch für einen der Spitze abgewandten Endabschnitt des Einsatzes.It has particular advantages when the distance between the spacers, caused by the spacers, of at least a majority of the panels amounts to between 0.2 mm and 2.0 mm, preferably an amount between 0.4 mm and 1.5 mm. Generally, it is conceivable that the distance between all the screens is the same. It is also possible to increase or decrease the distance in the spinning direction. Furthermore, it is preferred that the insert has a tip facing the inlet opening, whose longitudinal extension running parallel to the longitudinal axis of the withdrawal channel is greater than the above-mentioned height of a panel. The same applies preferably also for a tip end facing away from the insert.
Ebenso bringt es Vorteile mit sich, wenn zumindest ein Großteil der Abstandshalter als jeweils zwei benachbarte Blenden miteinander verbindender Steg ausgebildet ist, wobei die Stege jeweils in einem, vorzugsweise von den Durchbrechungen beabstandeten, Randbereich der Blenden platziert sind. Die Stege können wiederum mit den Blenden einteilig ausgebildet sein. Denkbar ist auch, die Stege zwischen jeweils zwei benachbarte Blenden bzw. zwischen eine Blende und die Spitze des Einsatzes und/oder zwischen eine Blende und den oben genannten Endabschnitt des Einsatzes zu kleben. Vorzugsweise sind zudem zwischen den jeweiligen Blenden mehr als ein Steg angeordnet, um die Stabilität des Einsatzes zu erhöhen.Likewise, it brings advantages when at least a majority of the spacers is formed as a respective two adjacent panels interconnecting web, wherein the webs are each placed in a, preferably spaced from the apertures, edge region of the panels. The webs may in turn be integrally formed with the panels. It is also conceivable to glue the webs between in each case two adjacent panels or between a panel and the tip of the insert and / or between a panel and the abovementioned end section of the insert. Preferably, more than one web are also arranged between the respective panels in order to increase the stability of the insert.
Auch ist es äußert vorteilhaft, wenn der Einsatz eine der Einlassöffnung zugewandte Spitze besitzt, die mit einem inneren Oberflächenabschnitt der Spinnspitze verbunden, vorzugsweise verklebt und/oder verpresst, ist. Die Spitze des Einsatzes folgt also vorzugsweise der inneren Oberflächenstruktur der Spinnspitze und geht hierbei direkt in die Einlassmündung des Garnbildungselements bzw. dessen Spinnspitze über. Die Spitze des Einsatzes hat hierfür vorzugsweise eine kegel- bzw. kegelstumpfförmige Außenkontur, mit der er an der entsprechend geformten Innenkontur des Einsatzes anliegt.Also, it is extremely advantageous if the insert has a tip facing the inlet opening, which is connected to an inner surface portion of the spinning tip, preferably glued and / or pressed. The tip of the insert thus preferably follows the inner surface structure of the spinning tip and in this case passes directly into the inlet mouth of the yarn formation element or its spinning tip. The tip of the insert for this purpose preferably has a conical or frusto-conical outer contour, with which it bears against the correspondingly shaped inner contour of the insert.
Ebenso ist es vorteilhaft, wenn der Einsatz in seinem der Einlassöffnung abgewandten Stirnbereich eine, vorzugsweise äußere, Querschnittsänderung aufweist, über die er mit einem Auslassbereich einer Spinndüse der Luftspinnmaschine verbindbar ist. Die Querschnittsänderung kann hierbei beispielsweise als ringförmige Querschnittsverjüngung oder -erweiterung vorliegen, die nach Einbau in eine Spinndüse formschlüssig mit einem entsprechenden Gegenabschnitt der Spinndüse in Verbindung bringbar ist. Weist auch der genannte Gegenabschnitt einen entsprechenden Kanalabschnitt auf, der sich an den Abzugskanal des Einsatzes anschließt und mit diesem einen einheitlichen Abzugskanal der Spinndüse bildet, so bewirkt die Querschnittsänderung eine besonders luftdichte Verbindung von Einsatz und Gegenabschnitt, so dass während des Spinn- bzw. Anspinnvorgangs Druckverluste durch Leckluft vermieden werden können.It is likewise advantageous if the insert has a, preferably outer, cross-sectional change in its end region remote from the inlet opening, via which it can be connected to an outlet region of a spinneret of the air-spinning machine. The cross-sectional change may in this case be present, for example, as an annular cross-sectional tapering or widening, which after installation in a spinneret can be brought into positive connection with a corresponding mating section of the spinneret. If the countersection also has a corresponding channel section, which adjoins the outlet channel of the insert and forms with it a uniform outlet channel of the spinneret, the change in cross section causes a particularly airtight connection of insert and counterpart section, so that during the spinning or piecing process Pressure losses can be avoided by leakage air.
Besondere Vorteile bringt es mit sich, wenn der Einsatz einteilig und vorzugsweise als Druckgussteil ausgebildet ist, das vorzugsweise mit einer Oberflächenbeschichtung versehen ist, die eine höhere Verschleißfestigkeit aufweist als das Druckgussteil. Beispielsweise kann der Einsatz aus einem Kunststoff gefertigt sein, der anschließend durch eine entsprechende Beschichtung veredelt wurde.Particular advantages arise when the insert is formed integrally and preferably as a die-cast part, which is preferably provided with a surface coating which has a higher wear resistance than the die-cast part. For example, the insert can be made of a plastic, which was then finished by an appropriate coating.
Die erfindungsgemäße Spinndüse für eine Luftspinnmaschine, die der Herstellung eines Garns aus einem Faserverband mit Hilfe einer Luftströmung dient, zeichnet sich schließlich dadurch aus, dass das in die Wirbelkammer der Spinndüse ragende Garnbildungselement einen inneren Einsatz gemäß bisheriger Beschreibung besitzt, so dass eine während eines Anspinnvorgangs entgegen der Spinnrichtung in den Abzugskanal eingebrachte Luftströmung teilweise über die Luftaustrittsöffnungen und teilweise über die Einlassöffnung entweichen kann.The spinnerette for an air spinning machine according to the invention, which serves to produce a yarn from a fiber structure by means of an air flow, is finally characterized by the fact that in the vortex chamber of the spinneret projecting Garnbildungselement has an inner insert according to the previous description, so that one during a piecing process Air flow introduced into the extraction duct in opposite direction to the spinning direction can escape in part via the air outlet openings and partly via the inlet opening.
In diesem Zusammenhang ist es insbesondere von Vorteil, wenn der Abzugskanal mit wenigstens einer Injektionsdüse in Verbindung steht, über die eine entgegen der Spinnrichtung gerichtete Luftströmung in den Abzugskanal einbringbar ist. Hierdurch ist während eines Anspinnvorgangs, bei dem ein Garnende entgegen der Spinnrichtung durch den Abzugskanal bis in den Bereich vor der Spinndüse transportiert werden muss, eine Luftströmung erzeugbar, die sich in der genannten Richtung durch den Abzugskanal erstreckt. Weist der Einsatz zudem die genannten Luftaustrittsöffnungen und auch die beschriebenen Blenden auf, so wird der Luftstrom innerhalb des Einsatzes in einen ersten und einen zweiten Luftstrom aufgeteilt, wobei der erste Luftstrom den Einsatz über die Einlassöffnung der Spinnspitze verlässt und der zweite Luftstrom über die Luftaustrittsöffnungen entweichen kann.In this context, it is particularly advantageous if the withdrawal channel communicates with at least one injection nozzle, via which an air flow directed counter to the spinning direction can be introduced into the withdrawal channel. In this way, during a piecing process in which a yarn end must be transported against the spin direction through the discharge channel to the area in front of the spinneret, an air flow can be generated, which extends in the direction indicated by the discharge channel. If the insert also has the said air outlet openings and also the shutters described, the air flow within the insert is divided into a first and a second air flow, wherein the first air flow leaves the insert via the inlet opening of the spinning tip and the second air flow escape via the air outlet openings can.
Vorteile bringt es zudem mit sich, wenn die Spinnspitze des Garnbildungselements in eine, vorzugsweise hülsenförmige, Wandung übergeht, die den Einsatz umgibt und gemeinsam mit der Spinnspitze eine innere, den Einsatz aufnehmende, Kammer des Garnbildungselements begrenzt. Die Kammer sollte zudem in wenigstens einen Luftabführkanal der Spinndüse münden, so dass der Anteil der über eine Injektionsdüse eingebrachten Luft, der über die Austrittsöffnungen des Einsatzes abgetrennt wird, die Spinndüse ausschließlich über die Kammer und den bzw. die sich daran angrenzenden Luftabführkanäle verlassen kann.It also brings advantages when the spinning tip of the Garnbildungselements merges into a, preferably sleeve-shaped, wall which surrounds the insert and together with the spinning tip an inner, the insert receiving chamber of Garnbildelements limited. The chamber should also open into at least one Luftabführkanal the spinneret, so that the proportion of introduced via an injection nozzle air, which is separated via the outlet openings of the insert, the spinneret can rely solely on the chamber and the or the adjoining Luftabführkanäle.
Mit anderen Worten erfolgt mit Hilfe des Einsatzes eine Aufteilung einer über die wenigstens eine Injektionsdüse eingebrachten Luftströmung derart, dass ein erster Teilluftstrom über die Einlassöffnung der Spinnspitze in die Wirbelkammer und ein zweiter Teilluftstrom über die Luftaustrittsöffnungen des Einsatzes in die Kammer und von dort in den wenigstens einen Luftabführkanal zwangsgeführt wird, ohne hierbei in die Wirbelkammer zu gelangen. Eine Vermischung der beiden Luftströme innerhalb der Wirbelkammer ist somit ausgeschlossen, so dass ein Garn zuverlässig entgegen der Spinnrichtung durch die Spinndüse geführt werden kann, sobald die Injektionsdüse(n) mit Druckluft beaufschlagt wird bzw. werden.In other words, by means of the insert, a division of an air flow introduced via the at least one injection nozzle takes place such that a first partial air flow via the inlet opening of the spinning tip into the vortex chamber and a second partial air flow via the air outlet openings of the insert into the chamber and from there into the at least an air discharge passage is forcibly guided, without thereby entering the vortex chamber. A mixing of the two air streams within the vortex chamber is thus excluded, so that a yarn can be reliably guided against the spinning direction through the spinneret as soon as the injection nozzle (s) is acted upon with compressed air or are.
Der oder die Luftabführkanäle sind hierbei entweder mit einem außerhalb der Spinnstelle angeordneten Luftabführsystem verbunden oder enden in einem Auslass, der im Bereich der Außenfläche der Spinndüse platziert ist, so dass die austretende Luft in den die Spinndüse umgebenden Raum abgeschieden werden kann. Der Auslass bzw. der oder die Luftabführkanäle können bei Bedarf mit einem ansteuerbaren Ventil versehen sein, um die genannten Kanäle während des Spinnbetriebs verschließen und hierdurch ein Austreten von Leckluft vermeiden zu können.The air discharge duct or ducts are either connected to an air removal system arranged outside the spinning station or terminate in an outlet which is placed in the region of the outer surface of the spinneret, so that the exiting air is separated into the space surrounding the spinneret can be. If necessary, the outlet or the air outlet duct or ducts can be provided with a controllable valve in order to close said ducts during the spinning operation and thereby to prevent leakage of leakage air.
Ebenso bringt es Vorteile mit sich, wenn die Spinnspitze, vorzugsweise im Bereich ihrer der Einlassöffnung abgewandten Stirnseite gegenüber der Wandung fixiert ist, wobei der Übergang zwischen Wandung und Spinnspitze vorzugsweise luftdicht gestaltet ist, um eine Leckluftströmung zu vermeiden. Die Spinnspitze kann hierfür einen, insbesondere ringförmigen, Halteabschnitt aufweisen, der formschlüssig mit einer Überwurfhülse in Wirkverbindung steht. Die Überwurfhülse ist wiederum mit der genannten Wandung verbunden und presst die Spinnspitze in Richtung derselben, so dass eine stabile Anbindung der Spinnspitze an den die Wandung aufweisenden Abschnitt der Spinndüse sichergestellt ist.Likewise, it brings advantages when the spinning tip, preferably in the region of the inlet opening facing away from the end face is fixed to the wall, wherein the transition between the wall and spinning tip is preferably designed airtight to avoid leakage air flow. The spinning tip can for this purpose have a, in particular annular, holding portion which is positively connected to a cap sleeve in operative connection. The cap sleeve is in turn connected to said wall and presses the spinning tip in the direction of the same, so that a stable connection of the spinning tip is ensured at the wall having the portion of the spinneret.
Vorteile bringt es hierbei mit sich, wenn die Überwurfhülse mit der Wandung verschraubt ist. Die Wandung und die Überwurfmutter besitzen hierfür vorzugsweise entsprechend korrespondierende Gewinde, so dass die Kraft, mit der die Spinnspitze gegen die anliegende Wandung der Spinndüse bzw. eine dazwischenliegende Dichtung gedrückt wird, auf einfache Weise eingestellt werden kann. Zudem ist ein Entfernen bzw. ein Austausch von Spinnspitze und/oder Einsatz jederzeit möglich.There are advantages here when the cap sleeve is screwed to the wall. The wall and the nut preferably have corresponding corresponding threads, so that the force with which the spinning tip is pressed against the adjacent wall of the spinneret or an intermediate seal can be adjusted in a simple manner. In addition, removal or replacement of the spinning tip and / or insert is possible at any time.
Der erfindungsgemäße Einsatz eines Garnbildungselements einer Luftspinnmaschine, die der Herstellung eines Garns aus einem Faserverband mit Hilfe einer Luftströmung dient, wobei das Garnbildungselement eine Spinnspitze mit einer, von einer äußeren Oberfläche der Spinnspitze umgebenen, Einlassöffnung besitzt, in deren Bereich mit Hilfe der Luftströmung ein Garn erzeugbar ist, und wobei der Einsatz einen Abzugskanal für das Garn und mehrere von dem Abzugskanal seitlich abzweigende Luftaustrittsöffnungen besitzt, so dass eine entgegen einer Spinnrichtung in den Abzugskanal eingebrachte Luftströmung teilweise über die Luftaustrittsöffnungen entweichen kann, zeichnet sich schließlich dadurch aus, dass der Einsatz mehrere zueinander benachbarte Blenden mit jeweils einer Durchbrechung umfasst, die gemeinsam einen Teil des Abzugskanals begrenzen, und dass die Blenden mit Hilfe von Abstandshaltern voneinander beabstandet sind, wobei die Luftaustrittsöffnungen durch zwischen den Blenden vorhandene Freiräume gebildet werden.The use according to the invention of a yarn formation element of an air spinning machine, which serves to produce a yarn from a fiber structure by means of an air flow, the yarn formation element having a spinning tip with an inlet opening surrounded by an outer surface of the spinning tip, in whose region a yarn is produced by means of the air flow can be generated, and wherein the use of a take-off channel for the yarn and a plurality of laterally branching off the discharge duct air outlet openings, so that one opposite to a spinning direction in characterized in that the insert comprises a plurality of mutually adjacent diaphragms, each with an opening, which together define a part of the exhaust duct, and that the panels are spaced apart by means of spacers from one another, wherein the air outlet openings are formed by existing between the apertures open spaces.
Hinsichtlich möglicher Weiterbildungen des Einsatzes wird auf die bisherige sowie die nachfolgende Beschreibung verwiesen, wobei sämtliche den Einsatz betreffenden Merkmale einzeln oder in beliebiger Kombination verwirklicht sein können.With regard to possible developments of the insert, reference is made to the previous and the following description, wherein all the features relating to the use can be implemented individually or in any desired combination.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigen:
-
Figur 1 - eine Schnittdarstellung einer erfindungsgemäßen Spinndüse,
-
Figur 2 - einen Ausschnitt der Spinndüse gemäß
Figur 1 , - Figur 3
- eine Schnittdarstellung des in
den Figuren 1 und2 gezeigten erfindungsgemäßen Garnbildungselements, geschnitten entsprechend der Linie C-C' in ,Figur 4 -
Figur 4 - eine Schnittdarstellung des Garnbildungselements aus
Figur 3 , geschnitten entsprechend der Linie A-A' inFigur 3 , -
Figur 5 - eine Schnittdarstellung eines weiteren nicht erfindungsgemäßen Garnbildungselements, geschnitten entsprechend der Linie D-D' in
, undFigur 6 -
Figur 6 - eine Schnittdarstellung des Garnbildungselements aus
Figur 5 , geschnitten entsprechend der Linie B-B' in .Figur 5
- FIG. 1
- a sectional view of a spinneret according to the invention,
- FIG. 2
- a section of the spinneret according to
FIG. 1 . - FIG. 3
- a sectional view of the in the
FIGS. 1 and2 shown yarn formation element according to the line CC 'inFIG. 4 . - FIG. 4
- a sectional view of Garnbildungselements
FIG. 3 , cut according to the line AA 'inFIG. 3 . - FIG. 5
- a sectional view of another Garnbildungselements not inventive, cut according to the line DD 'in
FIG. 6 , and - FIG. 6
- a sectional view of Garnbildungselements
FIG. 5 , cut according to the line BB 'inFIG. 5 ,
Vorab sei erwähnt, dass in Figuren, die mehrere gleichartig dargestellte Bauteile (beispielsweise die in den
In die Wirbelkammer 20 münden wiederum mehrere Luftdüsen 22, die beispielsweise über einen mit einer Luftdruckquelle auf nicht gezeigte Weise verbundenen Ringkanal 27 mit Druckluft versorgbar sind. Mit Hilfe der in die Wirbelkammer 20 vorzugsweise tangential einströmenden Luftströmung erfolgt schließlich die dem Fachmann bekannte Garnbildung, bei der die äußeren Fasern des eintretenden Faserverbands 3 im Bereich der Spinnspitze 4 bzw. einer äußeren Oberfläche 5 eines Garnbildungselements 1 von der Luft erfasst, zu einem gewissen Teil aus dem Faserverband 3 herausgezogen und schließlich um den verbleibenden Faserverbandskern gewunden werden. Das so erzeugte Garn 2 passiert schließlich die Einlassöffnung 6 des Garnbildungselements 1 und wird schließlich über einen sich an die Einlassöffnung 6 anschließenden Abzugskanal 8 aus der Spinndüse 31 abgezogen (der Abzug erfolgt in der Regel mit Hilfe einer der Spinndüse 31 in Spinnrichtung S nachgeordneten Abzugseinrichtung, beispielsweise einem Abzugswalzenpaar).In turn,
Kommt es nun zu einer ungewollten oder gewollten Unterbrechung des Spinnbetriebs, d. h. der Herstellung des Garns 2, so muss das Garnende des bereits produzierten Garns 2 entgegen der Spinnrichtung S durch den Abzugskanal 8, die Wirbelkammer 20 und die Einlaufmündung 21 der Spinndüse 31 transportiert werden, um im Bereich vor der Spinndüse 31 mit dem Faserverband 3 verbunden und der Spinndüse 31 erneut zugeführt werden zu können (so genannter Anspinnvorgang).If there is now an unwanted or intentional interruption of the spinning operation, ie the production of the
Hierzu weist die Spinndüse 31 eine (oder mehrere) in den Abzugskanal 8 mündende Injektionsdüse(n) 23 auf, die mit einer nicht gezeigten Überdruckquelle in Verbindung steht bzw. stehen. Soll nun das Garnende in der beschriebenen Weise durch die Spinndüse 31 rückgeführt werden, so wird die Injektionsdüse 23 mit einem Überdruck beaufschlagt, so dass eine Luftströmung entsteht, die sich entgegen der Spinnrichtung S in den Abzugskanal 8 erstreckt. Hierbei entsteht neben einer noch näher zu beschreibenden Luftströmung entgegen der Spinnrichtung S auch ein Unterdruck im Auslassbereich 18 der Spinndüse 31, der ein An- bzw. Einsaugen des Garnendes bewirkt.For this purpose, the
Wie
Um diesem Problem zu begegnen, weist das erfindungsgemäße Garnbildungselement 1 nun mehrere Luftaustrittsöffnungen 9 auf, die seitlich vom Abzugskanal 8 abzweigen, wobei die Luftaustrittsöffnungen 9 im Bereich eines Einsatzes 7 des Garnbildungselements 1 angeordnet sind. Dieser kann beispielsweise über eine stirnseitige Querschnittsänderung 17 mit einem Gegenabschnitt der Spinndüse 31 in Kontakt stehen, um einen Übergang zwischen Einsatz 7 und dem sich daran anschließenden Abschnitt des Abzugskanals 8 zu schaffen.In order to counteract this problem, the
Wie der Zusammenschau der
Hierfür ist es von Vorteil, wenn der Durchmesser der Durchbrechungen 11 der Blenden 10 entgegen der Spinnrichtung S abnehmen. Hierdurch entstehen die besonders gut in
Um nun zu verhindern, dass der über die Luftaustrittsöffnungen 9 abgeschiedene (zweite) Teilluftstrom ebenfalls in die Wirbelkammer 20 gelangt und dort die Rückführung des Garnendes negativ beeinflusst, ist der erfindungsgemäße Einsatz 7 im Inneren der Spinnspitze 4 des Garnbildungselements 1 platziert und mit dieser beispielsweise im Bereich einer Spitze 15 des Einsatzes 7 gegenüber einem inneren Oberflächenabschnitt 16 der Spinnspitze 4 fixiert. Der Einsatz 7 kann hierfür beispielsweise als (vorzugsweise einteiliges) Druckgussteil ausgebildet sein und/oder mit der Spinnspitze 4 verklebt oder verpresst sein.In order to prevent now that the (second) partial air flow separated via the
Die Spinnspitze 4 ist wiederum gegenüber einer Wandung 24 der Spinndüse 31 derart fixiert, dass eine gegenüber der Wirbelkammer 20 abgeschlossene Kammer 25 entsteht, die wiederum mit einem oder mehreren Luftabführkanälen 26 in Verbindung steht (siehe
Im Ergebnis kann der mit Hilfe der Luftaustrittsöffnung 9 abgeschiedene Luftstrom ausschließlich über den oder die Luftabführkanäle 26 entweichen, so dass eine Beeinflussung des über die Einlassöffnung 6 in die Wirbelkammer 20 eintretenden Teilluftstroms wirksam verhindert werden kann.As a result, the air flow separated with the aid of the
Schließlich zeigt die Zusammenschau der
Die vorliegende Erfindung ist nicht auf das dargestellte und beschriebene Ausführungsbeispiel beschränkt. Abwandlungen im Rahmen der Patentansprüche sind ebenso möglich wie eine Kombination der Merkmale, auch wenn sie in unterschiedlichen Ausführungsbeispielen dargestellt und beschrieben sind.The present invention is not limited to the illustrated and described embodiment. Variations within the scope of the claims are just as possible as a combination of features, even if they are shown and described in different embodiments.
- 11
- GarnbildungselementGarnbildungselement
- 22
- Garnyarn
- 33
- Faserverbandfiber structure
- 44
- Spinnspitzespinning top
- 55
- äußere Oberfläche des Garnbildungselementsouter surface of the yarn formation element
- 66
- Einlassöffnunginlet port
- 77
- Einsatzcommitment
- 88th
- Abzugskanalculvert
- 99
- LuftaustrittsöffnungAir outlet opening
- 1010
- Blendecover
- 1111
- Durchbrechungperforation
- 1212
- Abstandshalterspacer
- 1313
- Bohrungdrilling
- 1414
- Stegweb
- 1515
- Spitzetop
- 1616
- innerer Oberflächenabschnitt der Spinnspitzeinner surface portion of the spinning tip
- 1717
- QuerschnittsänderungCross-sectional change
- 1818
- Auslassbereichoutlet
- 1919
- WirbelkammerwandungWirbelkammerwandung
- 2020
- Wirbelkammerswirl chamber
- 2121
- Einlaufmündunginlet mouth
- 2222
- Luftdüseair nozzle
- 2323
- Injektionsdüseinjection nozzle
- 2424
- Wandungwall
- 2525
- Kammerchamber
- 2626
- Luftabführkanalair discharge
- 2727
- Ringkanalannular channel
- 2828
- ÜberwurfhülseCap sleeve
- 2929
- Halteabschnittholding section
- 3030
- Gewindethread
- 3131
- Spinndüsespinneret
- 3232
- Gehäusecasing
- 3333
- Abstufunggradation
- 3434
- Dichtelementsealing element
- 3535
- LuftaustrittsbohrungAir outlet bore
- SS
- Spinnrichtungspin direction
Claims (16)
- Yarn-producing element (1) for an air jet spinning machine, which is used for producing a yarn (2) from a fiber assembly (3) with the assistance of an air flow, whereas the yarn-producing element (1) has a spinning tip (4) with an inlet opening (6) surrounded by an outer surface (5) of the spinning tip (4), in the area of which a yarn (2) is able to be produced with the assistance of the air flow, and whereas the yarn-producing element (1) has an internal inset (7) with a draw-off conduit (8) adjacent to the inlet opening (6) for the yarn (2) and several air outlets (9) branching off on the side from the draw-off conduit (8), such that an air flow introduced counter to a spinning direction (S) in the draw-off conduit (8) can escape in part through the air outlets (9) and in part through the inlet opening (6) characterized in that the inset (7) includes several panels (10) adjacent to each other, each with an opening (11), which collectively restrict a part of the draw-off conduit (8) and that the panels (10) are spaced apart from each other with the assistance of spacers (12), whereas the air outlets (9) are formed by the open spaces existing between the panels (10).
- Yarn-producing element according to the preceding claim, characterized in that the openings (11) are formed by the holes (13) introduced in the middle of the panels (10) and arranged concentrically among each other, whereas the diameters of at least a majority of the holes (13) are preferably reduced in the direction facing the spinning tip (4).
- Yarn-producing element according to claim 2, characterized in that at least a majority of the panels (10) features a height running in the longitudinal direction of the draw-off conduit (8), the amount of which is between 0.5 mm and 3.0 mm, preferably between 1.0 mm and 2.0 mm, and/or that the mutual spacing, effected by the spacers (12), of at least a majority of the panels (10) to each other features an amount between 0.2 mm and 2.0 mm, preferably an amount between 0.4 and 1.5 mm.
- Yarn-producing element according to one or more of claims 2 and 3, characterized in that at least a majority of the spacers (12) is formed such that each is formed as a crosspiece (14) connecting two adjacent panels (10) with each other, whereas each of the crosspieces (14) is placed in an edge area of the panels (10), preferably spaced from the openings (11).
- Yarn-producing element according to one or more of the preceding claims, characterized in that the inset (7) has a tip (15) facing the inlet opening (6), which is connected, preferably glued and/or pressed, to an inner surface section (16) of the spinning tip (4), and/or that the inset (7) features in its front area turned away from the inlet opening (6) a change in cross-section (17) that is preferably external, through which it is connectable with an outlet area (18) of a spinneret (31) of the air jet spinning machine.
- Yarn-producing element according to one or more of the preceding claims, characterized in that the inset (7) is formed as one piece and preferably as a die-cast part, which is preferably provided with a surface coating, which features a greater resistance to wear than the die-cast part.
- Spinneret (31) of an air jet spinning machine, which is used for producing a yarn (2) from a fiber assembly (3) with the assistance of an air flow, whereas the spinneret (31) features a vortex chamber (20) surrounded in part by a vortex chamber wall (19) with an inflow outlet (21) for a fiber assembly (3) and a yarn-producing element (1) extending at least in part into the vortex chamber (20), whereas air nozzles (22) are associated to the vortex chamber (20) which are aligned in the direction of the outer surface (5) of the yarn-producing element (1), and through which air is able to be introduced into the vortex chamber (20), in order to impart a twist onto the fiber assembly (3) in the area of an inlet opening (6) of the yarn-producing element (1), and whereas the yarn-producing element (1) features a draw-off conduit (8) adjacent to the inlet opening (6), through which the yarn (2) is extractable from the vortex chamber (20) in a spinning direction (S), characterized in that the yarn-producing element (1) is designed in accordance with one or more of the preceding claims.
- Spinneret according to the preceding claim, characterized in that the draw-off conduit (8) is in contact with at least one injection nozzle (23), through which an air flow directed counter to the spinning direction (S) is able to be introduced into the draw-off conduit (8).
- Spinneret according to the preceding claim, characterized in that the spinning tip (4) of the yarn-producing element (1) merges into a wall (24) that is preferably sleeve-shaped, which surrounds the inset (7) and, together with the spinning tip (4), confines an inner chamber (25) of the yarn-producing element (1) that incorporates the inset (7), which in turn leads to at least one air extraction conduit (26) of the spinneret (31), whereas, with the assistance of the inset (7), a segregation of an air flow introduced through at least one injection nozzle (23) takes place in such a manner that a first partial air flow is forcibly guided into the vortex chamber (20) through the inlet opening (6) of the spinning tip (4), and a second air flow is forcibly guided into the chamber (25) through the air outlets (9) of the inset (7), and from there into at least one air extraction conduit (26), without this arriving in the vortex chamber (20).
- Spinneret according to the preceding claim, characterized in that the spinning tip (4), preferably in the area of its front side turned away from the inlet opening (6), features a retaining section (29) that is particularly ring-shaped, which is in operative connection with a cap sleeve (28) in a positive-locking manner, which sets the spinning tip (4) against the wall (24), whereas the cap sleeve (28) is preferably bolted to the wall (24).
- Internal inset (7) of a yarn-producing element (1) of an air jet spinning machine, which is used for producing a yarn (2) from a fiber assembly (3) with the assistance of an air flow, whereas the inset (7) has a draw-off conduit (8) for the yarn (2) and several air outlets (9) branching off on the side from the draw-off conduit (8), such that an air flow introduced counter to the spinning direction (S) in the draw-off conduit (8) can escape in part through the air outlets (9) characterized in that it includes several panels (10) adjacent to each other, each with an opening (11), which collectively restrict a part of the draw-off conduit (8) and that the panels (10) are spaced from each other with the assistance of spacers (12), whereas the air outlets (9) are formed by the open spaces existing between the panels (10).
- Inset according to the preceding claim, characterized in that the openings (11) are formed by holes (13) introduced in the middle of the panels (10) and arranged concentrically among each other, whereas the diameters of at least a majority of the holes (13) are preferably reduced in the direction facing the spinning tip (4).
- Inset according to claim 12, characterized in that at least a majority of the panels (10) features a height running in the longitudinal direction of the draw-off conduit (8), which measures between 0.5 mm to 3.0 mm, preferably between 1.0 mm and 2.0 mm, and/or that the mutual spacing, effected by the spacers (12), of at least a majority of the panels (10) to each other measures between 0.2 mm and 2.0 mm, preferably between 0.4 and 1.5 mm.
- Inset according to one or more of claims 12 and 13, characterized in that at least a majority of the spacers (12) is formed as a crosspiece (14) connecting two adjacent panels (10) with each other, whereas each of the crosspieces (14) is placed in an edge area of the panels (10), preferably spaced from the openings (11).
- Inset according to one or more of claims 11 to 14, characterized in that the inset (7) has a tip (15), which is able to be connected, preferably able to be glued and/or pressed, to an inner surface section (16) of a spinning tip (4) of the yarn-producing element (1), and/or that the inset (7) features in a front area a change in cross-section (17) that is preferably external, through which it is connectable with an outlet area (18) of a spinneret (31) of an air jet spinning machine.
- Inset according to one or more of the claims 11 to 15, characterized in that the inset (7) is formed as one piece and preferably as a die-cast part, which is preferably provided with a surface coating, which features a greater resistance to wear than the die-cast part.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012110315.1A DE102012110315A1 (en) | 2012-10-29 | 2012-10-29 | Garnbildungselement for an air-spinning machine with an insert and spinneret equipped therewith |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2730685A1 EP2730685A1 (en) | 2014-05-14 |
EP2730685B1 true EP2730685B1 (en) | 2018-12-05 |
Family
ID=49447412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13189333.1A Active EP2730685B1 (en) | 2012-10-29 | 2013-10-18 | Yarn forming element for an air jet spinning machine with an insert and spindle equipped with the same |
Country Status (4)
Country | Link |
---|---|
US (1) | US8966873B2 (en) |
EP (1) | EP2730685B1 (en) |
CN (1) | CN103789879B (en) |
DE (1) | DE102012110315A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014112360A1 (en) * | 2014-08-28 | 2016-03-03 | Maschinenfabrik Rieter Ag | Garnbildungselement for a spinneret of an air spinning machine, air-jet spinning machine and method for operating such |
JP2016196352A (en) * | 2015-04-06 | 2016-11-24 | 村田機械株式会社 | Yarn-end guiding device for yarn feeding bobbin end and bobbin preparation system |
DE102015120437A1 (en) * | 2015-11-25 | 2017-06-01 | Maschinenfabrik Rieter Ag | Air-jet spinning machine and method for operating the same |
ITUA20163006A1 (en) * | 2016-04-29 | 2017-10-29 | Savio Macch Tessili Spa | AIR-JET TYPE SPINNING DEVICE |
ITUA20163011A1 (en) * | 2016-04-29 | 2017-10-29 | Savio Macch Tessili Spa | AIR-JET TYPE SPINNING DEVICE |
DE102016116693A1 (en) | 2016-09-07 | 2018-03-08 | Maschinenfabrik Rieter Ag | Garnbildungselement and spinneret for an air-spinning machine |
EP4043625A1 (en) * | 2021-02-10 | 2022-08-17 | Saurer Intelligent Technology AG | Yarn forming element |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3829150A1 (en) * | 1988-08-27 | 1990-03-01 | Fritz Stahlecker | AIR NOZZLE FOR PNEUMATIC SPIRAL SPINNING |
US6438934B1 (en) * | 1994-05-24 | 2002-08-27 | University Of Manchester Institute Of Science And Technology | Apparatus and method for fabrication of textiles |
JP3064951B2 (en) * | 1997-04-24 | 2000-07-12 | 村田機械株式会社 | Threader |
DE19927838B4 (en) * | 1999-06-18 | 2008-01-31 | Oerlikon Textile Gmbh & Co. Kg | Device for producing spun threads |
US7059110B2 (en) * | 2000-09-22 | 2006-06-13 | Maschinenfabrik Rieter Ag | Spinning device for production of spun thread from a fibre sliver |
JP2002138329A (en) * | 2000-10-26 | 2002-05-14 | Murata Mach Ltd | Yarn-threading device |
EP1288354A3 (en) * | 2001-08-29 | 2003-07-16 | Maschinenfabrik Rieter Ag | Measures for influencing the axial airflow in the spinning channel of a vortex spinning apparatus |
DE10311826A1 (en) * | 2003-03-13 | 2004-09-23 | Wilhelm Stahlecker Gmbh | Yarn spinner, using staple fiber slivers, has an eddy chamber for the drawn sliver with an air extraction channel and a drawing unit cleaning channel, both connected to a common underpressure source |
DE10333411A1 (en) * | 2003-07-15 | 2005-02-03 | Wilhelm Stahlecker Gmbh | Apparatus for producing a spun yarn from a staple fiber strand |
JP3821132B2 (en) * | 2004-02-06 | 2006-09-13 | 村田機械株式会社 | Spinning machine |
JP2008510891A (en) * | 2004-08-20 | 2008-04-10 | マシーネンファブリク リーター アクチェンゲゼルシャフト | Spindle with injector passage and method for yarn splicing in an air jet spinning machine |
DE102004052206A1 (en) * | 2004-10-19 | 2006-04-20 | Wilhelm Stahlecker Gmbh | Air-jet spinning device |
CN201574228U (en) * | 2009-04-20 | 2010-09-08 | 浙江泰坦股份有限公司 | Spinning device |
DE102009034206A1 (en) | 2009-07-17 | 2011-01-27 | Maschinenfabrik Rieter Ag | Component for an air jet spinning device |
-
2012
- 2012-10-29 DE DE102012110315.1A patent/DE102012110315A1/en not_active Withdrawn
-
2013
- 2013-10-18 EP EP13189333.1A patent/EP2730685B1/en active Active
- 2013-10-29 US US14/065,645 patent/US8966873B2/en active Active
- 2013-10-29 CN CN201310521997.0A patent/CN103789879B/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20140116022A1 (en) | 2014-05-01 |
EP2730685A1 (en) | 2014-05-14 |
DE102012110315A1 (en) | 2014-04-30 |
CN103789879B (en) | 2017-10-31 |
CN103789879A (en) | 2014-05-14 |
US8966873B2 (en) | 2015-03-03 |
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