EP2573219A2 - Élément de formation de fil pour un poste de filage d'un métier à tisser à jet d'air et procédé de préparation d'un procédé de filage sur un métier à tisser à jet d'air - Google Patents

Élément de formation de fil pour un poste de filage d'un métier à tisser à jet d'air et procédé de préparation d'un procédé de filage sur un métier à tisser à jet d'air Download PDF

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Publication number
EP2573219A2
EP2573219A2 EP20120184770 EP12184770A EP2573219A2 EP 2573219 A2 EP2573219 A2 EP 2573219A2 EP 20120184770 EP20120184770 EP 20120184770 EP 12184770 A EP12184770 A EP 12184770A EP 2573219 A2 EP2573219 A2 EP 2573219A2
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EP
European Patent Office
Prior art keywords
channel
yarn
cover
air
garnbildungselement
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.)
Withdrawn
Application number
EP20120184770
Other languages
German (de)
English (en)
Inventor
Uwe Heitmann
Peter Artzt
Jörg HEHL
Heinz Müller
Kurt Ziegler
Markus Kübler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2573219A2 publication Critical patent/EP2573219A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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 element for a spinning station of an air-spinning machine, wherein the yarn-forming element has an inlet opening on one end side and a yarn feeder channel starting in the region of the inlet opening and extending inside the yarn-forming element. Furthermore, a method for preparing a piecing process at a spinning station of an air-spinning machine is described, wherein the spinning station has a yarn-forming element with a take-off channel for a yarn produced within the spinning station and a fiber guide element upstream of the yarn-forming element with a guide channel for a sliver to be fed to the spinning station.
  • the yarn After a yarn breakage on an air-jet spinning machine, it is customary to partially unwind the yarn end of the yarn produced before the yarn break within the spinning station of the air-spinning machine from the winding device accommodating the yarn and to guide it through the spinning station counter to the actual spinning direction.
  • the yarn first passes through the draw-off channel of a yarn-forming element, on the outer surface of which during the spinning process by a directed air flow rotation of the supplied fiber sliver and thus yarn formation occurs.
  • the yarn end After the yarn end has left the discharge channel through an opening arranged on the front side of the yarn formation element, which serves as an inlet opening for the yarn produced during spinning, it finally has to pass through the so-called fiber guide element.
  • this prevents the rotation of the sliver arising in the region of the inlet opening or that arising at this stage Garns as far as possible into the interior of the fiber guide channel and beyond can propagate.
  • the described process of returning the yarn end into the area between the feed rolls which supply the fiber sliver to be spun and the fiber guiding element preferably takes place with the aid of an air flow which enters the extraction channel at an acute angle via a separate air duct and leaves it via the inlet opening.
  • Such a solution can be, for example, the DE 10 2008 050 874 A1 remove.
  • the object of the present invention is thus to propose a yarn formation element for the spinning chamber of an air spinning machine and a method for preparing a piecing process, which allow an even more efficient return of the yarn end in the area in which the yarn end during the piecing with the spinning fiber sliver in contact is brought.
  • the yarn-forming element has an injection channel which extends at least partially within a wall of the yarn-forming element surrounding the discharge channel and opens into an outlet opening which is located in the region of an outer surface of the yarn-forming element.
  • the injection channel or the outlet opening are preferably aligned in such a way that when the injection channel is fed with air, an air flow can be generated which, starting from the outlet opening, at least partially in the direction of the end face having the inlet opening of the yarn formation element extends.
  • the yarn-forming element is generally a spinning spindle, ie a body which is generally elongate and has the abovementioned discharge channel, the end face of which has the inlet opening extending into the so-called swirl chamber of the spinning position after appropriate installation.
  • the yarn formation element may thus be either a one-piece hollow spindle or merely the spinning tip of such a spindle, ie, the front, preferably releasably arranged, portion of the spindle having the inlet opening.
  • the Garn avoirselement the said injection channel, with the aid of which an air flow can be generated, which extends in the installed state of Garn avoirselements in the direction of the inlet opening and thus in the direction of the fiber guide element described above. If now the yarn end for the subsequent piecing is moved so far against the spinning direction through the discharge channel that it enters the vortex chamber, so it is detected by said air flow extending from the outlet opening over a surface region of Garn Strukturselements into the guide channel of the already extends mentioned fiber guide element and leaves through this spinning station. The air flow thus decreases from the inlet opening of the discharge channel the course, which should also take the yarn end to get into the Anspinn Scheme outside the vortex chamber.
  • an air flow which detects the yarn end in the region of the inlet opening, threads into the guide channel of the fiber guide element and finally into the area between the fiber guide element and delivery roller pair (or a comparable Delivery device) moves.
  • a fiber guide element whose guide channel is offset with respect to the axis of the drawing channel in order to prevent propagation of the yarn twist into the region outside the vortex chamber, since the end of the yarn may have a step which may be present in this case Airflow can happen safely.
  • the Garnticianselement has at least one extending within the wall air duct, which opens at an acute angle in the discharge channel and is oriented such that when feeding the air duct with air within the discharge duct directed toward the inlet opening air flow generated is.
  • the yarn return through the spinning station can in this case take place with the aid of only two air flows, wherein the air flowing from the air duct into the discharge duct air causes a movement of the yarn end into the area of the swirl chamber and the air emerging from the injection duct ensures a guidance of the yarn end, which eventually favors threading it into the fiber guiding element.
  • the yarn-forming element has, for example, an annular chamber arranged in the wall, which, after installation in a spinning station, can be connected to a corresponding overpressure source. If a corresponding overpressure is applied before the piecing process, the air flows both through the injection channel as well as through the air channel, which opens into the outlet channel of Garn avoirselements. The said air flows finally unite in the vortex chamber in front of the fiber guide element, so that there is an increased air velocity in this area, which ensures a safe insertion of the yarn end into the guide channel of the fiber guide element.
  • the injection channel and / or the air channel are formed as a bore.
  • the bore forming the injection channel in this case extends, starting from the outlet opening, essentially in the spinning direction, ie. H. in the direction in which the yarn is withdrawn during the spinning process. If a return of the yarn end is desired, finally, the bore can be charged with air, so that an air flow is generated counter to the spinning direction. The air flow finally extends from the outlet opening in the direction of the guide channel of the fiber guide element.
  • the yarn formation element according to the invention can of course also have a plurality of said channels.
  • the injection channel extends at least partially rectilinearly and the rectilinear section encloses an angle with the longitudinal axis of the withdrawal channel, the amount of which lies between 1 ° and 10 °, preferably between 1 ° and 5 °.
  • said orientation of the injection duct ensures an air flow sweeping from the exit port along the outer surface of the yarn forming member toward the inlet port. In this area, the air eventually seizes the yarn end to be returned and ultimately causes the yarn end to be threaded into and transported through the guide channel of the fiber guiding element.
  • a parallel arrangement of injection channel and withdrawal channel possible.
  • the yarn formation element comprises a main body and a cover element, wherein the injection channel is formed by a preferably groove-shaped recess of the outer surface of the base body and a corresponding counter surface of the cover (alternatively, the recess can of course also in the inner surface of the cover or in both Be introduced elements as long as corresponding opposite portions of the base body and cover forming the injection channel according to the invention).
  • the subdivision mentioned in the main body and the cover element is appropriate.
  • the injection channel can be milled into the surface of the main body, so that first of all a kind of groove is created, which preferably extends in one plane with the withdrawal channel (ie the depression and withdrawal channel are congruent in a side view of the yarn formation element at least in a certain region).
  • the cover element should be designed so that it covers the recess except for the region of the outlet opening, in order to allow a free air outlet in the region of the outer surface of the Garnsentelements.
  • the cover element is designed as a sleeve ring which covers or covers at least part of the injection channel as well as a part of the outer surface of the yarn formation element.
  • the cover element has an inner surface for this purpose, the contour of which substantially corresponds to the contour of a region of the outer surface of the base body.
  • the cover forms a kind of lid with a central opening through which a part of the body extends after appropriate connection with the cover.
  • the cover member thus preferably has a truncated cone-shaped side view, which may have one or more graduations, wherein a relatively thin wall (wall thickness, for example, less than 2 mm) surrounds a cavity partially accommodating the main body.
  • the cover is made of a plastic in order to minimize the manufacturing cost.
  • the plastic should preferably be designed antistatic or electrically conductive in order to avoid a negative influence on the twist distribution during the spinning process.
  • the cover may also be rotationally symmetrical or have a protective coating to counteract any wear by possibly vorbestichde fibers.
  • the cover element has a section covering the outlet opening, which can be brought into a position releasing the outlet opening when the injection channel is charged with air.
  • the section can either be made (partially) of a flexible material or, as a whole, be movable between the position releasing the outlet opening and a position closing the opening.
  • the advantage of such an embodiment lies in the possibility of closing the opening during spinning operation, ie in the phase in which the injection channel is not charged with air (ie, the section is designed so that it is in its closed position without air back pressure emotional). Possibly aspirated from the vortex chamber fibers can thus not pass through the outlet opening in the injection channel, so that a blockage thereof is avoided.
  • the entire cover element can also consist of a rigid material.
  • cover element rests on the outer surface of the base body, except in the area of the injection channel. As a result, air flows between the base body and cover outside the injection channel can be avoided.
  • Base body and cover can be glued to each other, for example.
  • sealing element for example in the form of a sealing ring
  • the sealing ring is in this case preferably in an annular recess of the base body and / or the cover and can also be glued if necessary also with one or both of said components.
  • the cover element for connection to the base body has an (inner) thread, which cooperates with a mating thread of the base body (which is preferably designed as an external thread).
  • the cover may be formed in this embodiment of the invention as a kind of union nut, which is screwed onto the body. After screwing is formed by the overlap of the recess of the body of the desired injection channel, wherein the outlet opening of the same should remain free.
  • a clip connection ie, for example, a recess in the surface of the body and a correspondingly engaging projection of the cover.
  • a clip connection has the further advantage that the cover can be removed again from the body and replaced by a new cover when needed.
  • the yarn formation element or the base body and / or the cover element have at least one securing element, by means of which a rotation of the yarn formation element in the installed state in the spinning position can be prevented.
  • the securing element can be formed, for example, by an extension which engages in a corresponding depression of a component which bears against the respective component and which is already mounted in a rotationally fixed manner.
  • Conceivable are also corresponding safety bolts, locks or various tongue and groove connections.
  • one or more of the above-mentioned elements of the yarn-forming element should have a corresponding security, which prevents rotation of the respective element in the installed state in the spinning position.
  • the position of the injection channel within the vortex chamber can not change.
  • the injection channel extends at an axial offset between the discharge channel and guide channel of the fiber guide element substantially in the axial extension of the guide channel (of course, there is a certain spatial distance between the guide channel and injection channel).
  • the method according to the invention for preparing a piecing operation at a spinning station is characterized in that one end section of the already produced yarn is blown and / or sucked through the withdrawal channel against the spinning direction and, after emerging from the withdrawal channel, one produced during the preparation of the piecing process Air flow is detected and moved into the guide channel of the fiber guide element, wherein the air flow extends at least partially along an outer surface of the Garnsentelements in the direction of the guide channel. The air flow thus causes a threading in and a further transport through the guide channel, so that the yarn section after passing through the fiber guide element, for. B. from a robot, and taken for the piecing with the fiber sliver to be spun in Contact (ie partially overlaid).
  • the air flow is stopped again after successful return of the yarn end, so that the yarn end can be introduced together with the sliver in the spinning station and finally the newly produced yarn can be withdrawn through the trigger channel.
  • the extraction duct is also exposed to an air flow which extends in the direction of its inlet opening and connects in the region between the inlet opening and the guide channel with the air flow which is generated by the injection channel. The flow rate is thus higher within the fiber guide element than inside the discharge channel, so that the yarn end is always under a certain tension, which additionally supports the return of the yarn end.
  • FIG. 1 shows a partially sectioned side view of a spinning station 2 of an air-jet spinning machine according to the prior art.
  • the spinning station 2 comprises a fiber guide element 24, through which the fiber material 26 to be spun and usually present as a drawn sliver passes into the so-called swirl chamber 27 of the spinning station 2, in which finally the actual spinning process takes place.
  • the stretching takes on a drafting device upstream of the fiber guiding element 24, from which the drawn sliver is drawn off with the aid of a pair of withdrawal rollers.
  • the sliver is preferably detected by acting as a pair of delivery rollers 23 roller pair, which should be arranged as directly as possible following the fiber guide element 24 in order to avoid false warping.
  • the fiber material 26 After the fiber material 26 has passed the fiber guide element 24 via its guide channel 22, it passes into the effective range of several, in If these are acted upon during the spinning operation via corresponding supply lines 25 with an overpressure, so there is a vortex air flow, which flows around the upper portion of Garn Strukturselements 1. If the outwardly protruding fiber ends are detected by this air flow, then finally the desired rotation of the fiber material 26 results, and as a result the desired yarn 5, which can finally be withdrawn via the inlet opening 3 and the adjoining exhaust duct 4 from the swirl chamber 27.
  • the yarn-forming element 1 preferably has an air channel 10 which opens into the draw-off channel 4 at an acute angle. If the air duct 10 is now brought into communication with an overpressure source (not shown), an air flow is created, starting from the air duct 10 via the upper part of the exhaust duct 4 and from its inlet opening 3 via the swirl chamber 27 and finally via the guide channel 22 of the fiber guiding element 24 extends to the outside.
  • an overpressure source not shown
  • the yarn formation element 1 has an injection channel 6 which extends at least partially within a wall of the yarn formation element 1 surrounding the extraction channel 4 and opens into an outlet opening 8 which extends in the region of an outer surface of the yarn formation element 1 (Before going into detail on the invention and its advantageous embodiments, it should be made clear in advance that the spinning stations 2 according to the Figures 3 . 4 . 5 and 8th Of course, also have corresponding spinnerets 7, which are not shown for reasons of clarity; It is also possible and in many cases also advantageous, in the Figures 3 . 5 and 8th Garn Struktursetti 1 shown in addition to be provided with one or more air channels, as in connection with the FIGS. 1 and 2 have been described).
  • FIG. 3 The decisive advantage of the injection channel 6 according to the invention is now shown by way of example FIG. 3 , As can be seen from this figure, with the aid of the injection channel 6 (which in turn is connected to a corresponding overpressure source), during the return of the yarn end, an air flow 9 can be generated which extends from the outlet opening 8 along the tip of the yarn formation element 1 into the Guide channel 22 of the fiber guide channel 22 extends. If the yarn end to be returned now passes the inlet opening 3 of the same after its passage through the withdrawal channel 4, then it gets into the suction of this air flow 9 and is finally reliably threaded into the lower opening of the guide channel 22 and finally transported outwards by the fiber guide element 24.
  • the injection channel 6 in the axial extension of the guide channel 22, it is not excluded, this also elsewhere, for example, based on FIG. 3 right of the withdrawal channel 4, to arrange.
  • an air flow 9 can be generated, which takes the path through the fiber guide channel 22, which is also to take the yarn end during the preparation of a piecing process, so that a reliable yarn return is possible.
  • the (also in the embodiment according to FIG. 3 conceivable) air channel 10 to merge with the injection channel 6 and to open into a common air supply channel 11. If this air supply channel 11 is subjected to an overpressure during the desired yarn return, an air flow is created within the withdrawal channel 4 which moves the yarn 5 in the direction of the inlet opening 3 and finally unites outside the yarn formation element 1 with the air flow 9 passing through the injection channel 6 is produced. In the area between the inlet opening 3 and the fiber guide element 24, an air flow 9 with an increased flow velocity in comparison to the air flow prevailing in the outlet channel 4 is formed in this way. The yarn end can be reliably detected, guided into the guide channel 22 of the fiber guide element 24 and finally transported to the outside. Thus, the desired small diameter of the inlet opening 3 can be realized, since the resulting low air volume flow, which prevails within the discharge channel 4 when returning the yarn 5, is supplemented by the additional air flow 9 of the injection channel 6.
  • the synopsis is the Figures 3 and 4 It can be seen that the injection channel 6 or its adjoining the outlet opening 8 and generally rectilinear portion 20 does not necessarily have to be parallel to the longitudinal axis of the discharge channel 4. Rather, an oblique arrangement is advantageous, so that the rectilinear portion 20 of the injection channel 6 with the outlet channel 4 forms an angle between 1 ° and 10 °.
  • Garn Struktur ⁇ selements invention 1 which may generally be a hollow spindle or only referred to as a spinning tip separate, possibly detachable front portion of such a spindle
  • FIG. 5 shows FIG. 5
  • the Garn Strukturselement 1 is integrally formed according to the previous figures
  • the injection channel 6 can be made according to FIG FIG. 5 produced by milling or similar surface processing methods.
  • the covering element 13 should rest as completely as possible on the base body 12 in order to ensure that injected air can escape exclusively through the injection channel 6.
  • the injection channel 6 preferably extends along the outer surface of the base body 12 and follows its example, stepped contour. On the side facing the inlet opening 3 of the drawing-off channel 4, the injection channel 6 finally opens into the outlet opening 8, that is to say the section of the depression 14 which is not covered by the covering element 13.
  • the components mentioned have, for example, a thread 15 and a mating thread 16 corresponding thereto, so that the Covering 13 similar to a cap nut placed over the base body 12 and can be screwed with this.
  • FIG. 8 Another possible connection of body 12 and cover 13 is finally FIG. 8 refer to.
  • the connection of the two components takes place in this variant by means of a clip connection 19, wherein this consists of a recess of the base body 12 and a corresponding engaging therein bulge of the cover 13 (of course, the depression can also be introduced into the cover 13 and the base 12 with a corresponding Be provided bulge).
  • the said elements preferably do not extend around the entire outer circumference of the main body 12, they simultaneously act as anti-rotation of the cover 13 relative to the base 12. This may be advantageous if the cover 13 is not completely axisymmetric (for example, if it also or alternatively to the recess 14 of the base body 12 has a depression (forming) the injection channel 6).
  • the end portion 21 may also be flexible, so that it closes the outlet opening 8, as long as the injection channel 6 is not acted upon with air.
  • FIG. 8 shows a seal, for example in the form of a sealing ring 17, can be arranged between the base body 12 and the cover element 13 in order to prevent incorrect air flows outside the injection channel 6.
  • the base body 12 has a securing element 18 in the form of a recess, by means of which a rotation of the base body 12 relative to a fixedly arranged section 28 of the spinning station 2 can be prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP20120184770 2011-09-21 2012-09-18 Élément de formation de fil pour un poste de filage d'un métier à tisser à jet d'air et procédé de préparation d'un procédé de filage sur un métier à tisser à jet d'air Withdrawn EP2573219A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011053810A DE102011053810A1 (de) 2011-09-21 2011-09-21 Garnbildungselement für eine Spinnstelle einer Luftspinnmaschine sowie Verfahren zur Vorbereitung eines Anspinnvorgangs an einer Luftspinnmaschine

Publications (1)

Publication Number Publication Date
EP2573219A2 true EP2573219A2 (fr) 2013-03-27

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EP20120184770 Withdrawn EP2573219A2 (fr) 2011-09-21 2012-09-18 Élément de formation de fil pour un poste de filage d'un métier à tisser à jet d'air et procédé de préparation d'un procédé de filage sur un métier à tisser à jet d'air

Country Status (3)

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EP (1) EP2573219A2 (fr)
CN (1) CN103014932A (fr)
DE (1) DE102011053810A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2677070A1 (fr) * 2012-06-22 2013-12-25 Murata Machinery, Ltd. Corps d'arbre de guidage creux, fileuse à air et machine de renvideur de fil comprenant celle-ci
EP3293294A1 (fr) * 2016-09-07 2018-03-14 Maschinenfabrik Rieter AG Élément de formage des fils et bloc de filage pour une machine à filer à jet d'air
EP3309281A1 (fr) * 2016-10-05 2018-04-18 Maschinenfabrik Rieter AG Élément de guidage fibres pour jet de filature d'un métier à tisser à jet d'air et procédé de fonctionnement d'un métier à tisser à jet d'air

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016121331A1 (de) * 2016-11-08 2018-05-09 Maschinenfabrik Rieter Ag Spinndüse für eine Luftspinnmaschine sowie Verfahren zum Betrieb einer solchen
DE102017115939A1 (de) 2017-07-14 2019-01-17 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zum Betreiben einer Luftspinnvorrichtung, Fadenleitkanal und Luftspinnmaschine umfassend einen solchen Fadenleitkanal
EP3859061A1 (fr) * 2020-01-30 2021-08-04 Saurer Intelligent Technology AG Dispositif de réception d'une mèche de fibres

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008050874A1 (de) 2008-09-29 2010-04-01 Wilhelm Stahlecker Gmbh Luftdüsenspinnaggregat mit spindelförmigem Bauteil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333411A1 (de) * 2003-07-15 2005-02-03 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaserverband

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008050874A1 (de) 2008-09-29 2010-04-01 Wilhelm Stahlecker Gmbh Luftdüsenspinnaggregat mit spindelförmigem Bauteil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2677070A1 (fr) * 2012-06-22 2013-12-25 Murata Machinery, Ltd. Corps d'arbre de guidage creux, fileuse à air et machine de renvideur de fil comprenant celle-ci
JP2014005562A (ja) * 2012-06-22 2014-01-16 Murata Mach Ltd 中空ガイド軸体、空気紡績装置、及びこれを備える糸巻取機
EP3293294A1 (fr) * 2016-09-07 2018-03-14 Maschinenfabrik Rieter AG Élément de formage des fils et bloc de filage pour une machine à filer à jet d'air
JP2018040102A (ja) * 2016-09-07 2018-03-15 マスチネンファブリック ライター アーゲーＭａｓｃｈｉｎｅｎｆａｂｒｉｋ Ｒｉｅｔｅｒ Ａｇ エアジェット紡績機の糸形成要素および紡糸ノズル
EP3309281A1 (fr) * 2016-10-05 2018-04-18 Maschinenfabrik Rieter AG Élément de guidage fibres pour jet de filature d'un métier à tisser à jet d'air et procédé de fonctionnement d'un métier à tisser à jet d'air

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DE102011053810A1 (de) 2013-05-16
CN103014932A (zh) 2013-04-03

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