EP1178138B1 - Open-end spinning machine and a rotor lid therefor - Google Patents

Open-end spinning machine and a rotor lid therefor Download PDF

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Publication number
EP1178138B1
EP1178138B1 EP01116884A EP01116884A EP1178138B1 EP 1178138 B1 EP1178138 B1 EP 1178138B1 EP 01116884 A EP01116884 A EP 01116884A EP 01116884 A EP01116884 A EP 01116884A EP 1178138 B1 EP1178138 B1 EP 1178138B1
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EP
European Patent Office
Prior art keywords
rotor
cover
recess
spinning rotor
spinning
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP01116884A
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German (de)
French (fr)
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EP1178138A1 (en
Inventor
Kurt Lovas
Frank Beier
Josef Schermer
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
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Rieter Ingolstadt Spinnereimaschinenbau AG
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    • 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
    • D01H4/04—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 contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors
    • 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
    • D01H4/04—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 contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor

Definitions

  • the present invention relates to an open-end spinning device according to the preamble of claim 1 and a rotor lid according to the Preamble of claim 2.
  • DE 29 31 567 A1 discloses an open-end spinning device with a Spinning rotor a rotor lid with a lid attachment, a thread take-off channel and a fiber feed channel, in which a suction port connected to a vacuum source in the lid extension of the rotor lid inside the Spinning rotor, separated from the thread take-off path, against the inner wall of the rotor is directed.
  • An angled suction channel connects to the suction opening on which one, through the connection with the suction opening, forms a recess in the lid extension which is open at the rear, that is bounded on its side facing away from the rotor lid by a collar.
  • the object of the present invention is an open-end spinning device to create, which avoids these disadvantages and with the help of a positive influence on the yarn quality especially with regard to its Strength is achieved.
  • the length range of the cover attachment having the collar trained over its entire scope according to claim 3 what both in terms of production, but also in terms of Yarn loss is an advantage.
  • the recess according to the invention is preferably one or more of claims 4 to 9, since such a training of Subject of the invention surprisingly to particularly good yarn results leads.
  • the subject of the invention leads to better yarn results, in particular in terms of yarn strength and yarn uniformity.
  • the device according to the invention is simple to manufacture and can also be retrofitted in a Open-end spinning machine can be used.
  • Fig. 2 shows a spinning rotor 1, which is known and therefore not shown Way stored and driven by means of a shaft 10.
  • the spinning rotor 1 itself is located in a housing 7, which is connected to a vacuum line 70 is connected.
  • the spinning rotor 1 On its side facing away from the shaft 10, the spinning rotor 1 has one open side 11, which during the spinning process through a rotor lid 2 is covered. This has on its side facing the spinning rotor 1 a lid extension 3, which protrudes into the open side 11 of the spinning rotor 1 and receives a fiber feed channel 5 which one against the inner peripheral wall 12 of the spinning rotor 1 directed inlet mouth 50 has.
  • This fiber feed channel 5 has the task of spinning the rotor 1 single fibers (not shown) to be fed into a fiber collecting groove 13 of the Spinning rotor 1 collected and in the end of a thread (also not shown) be involved, which is continuously by a concentric to the cover extension 3 in the rotor cover 2 arranged thread take-off tube 6 the spinning rotor 1 removed and wound on a spool, not shown becomes.
  • the cover extension 3 has a conical peripheral surface 30 on, which is interrupted in a partial area by a recess 4 is.
  • This recess 4 does not extend to the rotor lid 2 facing end face 31 of the cover approach 3, but is from this is kept separate by a collar 40.
  • the fibers are transported into the spinning rotor 1 with the aid of an air stream, the by the negative pressure applied to the vacuum line 70 in Spinning rotor 1 is generated.
  • the fibers In the spinning rotor 1, the fibers must be removed from the air flow, with the help of which they were conveyed into the spinning rotor 1, separated and placed on the inner peripheral wall 12 of the spinning rotor 1, along which they due to the taper of this inner peripheral wall 12 and the rotational speed of the high speed during the spinning process rotating spinning rotor 1 into the fiber collecting groove 13 to slide into the To be integrated at the end of the thread that is continuously drawn.
  • the recess 4 causing the air expansion begins, based on the Direction of rotation indicated by an arrow f during the spinning process rotating spinning rotor 1, in the embodiment shown between 30 ° to 130 ° after the outlet mouth 50 of the fiber feed channel 5.
  • the beginning of the recess 4 depends in individual cases on various factors such as the feed speed of the transport air flow, diameter and Speed of rotation of the spinning rotor 1, etc.
  • the recess 4 extends over a larger circumferential area of the lid attachment 3.
  • the circumferential area is usually larger than that of the distance from the start the recess after the fiber feed channel (angle ⁇ ) and can be more than three quarters of the circumference of the lid attachment are sufficient, so that one such training the recess 4 at an acute angle ⁇ before Exit mouth 50 of the fiber feed channel 5 ends.
  • the air becomes the open side 11 of the spinning rotor 1, which is due to the action of negative pressure is achieved with the help of the negative pressure line under vacuum 70 comes into effect in the housing 7 surrounding the spinning rotor 1.
  • the resulting negative pressure in the housing 7 causes that in the spinning rotor 1 air is conveyed to the open side 11 of the spinning rotor 1 and leave it here towards housing 7.
  • the device described above is not limited to the training discussed, but can in many ways within the scope of the present invention To be modified.
  • the Recess 4 extends along a generatrix M of the cover extension 3.
  • a recess 41 is provided, which is inclined in such a way that - in relation to the direction of rotation of the spinning rotor 1 marked by the arrow f - on the collar 40 begins and with increasing distance from the outlet mouth 50 of the The fiber feed channel 5 moves further and further away from the collar 40 and the rotor lid 2 approaches.
  • the fact is taken into account that the air in the spinning rotor 1 is entrained by it during its rotation is and its open side 11 is fed along a helix.
  • the beginning of the recess 4 is also at the point where the air expansion is desired to keep the air speed in the interest a safe removal of the fibers from the transport air flow reduce, while the inclination of the recess 41, the removal of air favored the inside of the spinning rotor 1.
  • Ring surface 20 is intended in connection with the present description that area of the rotor lid 2 can be understood, which the open side 11 of the spinning rotor 1, d. H. the rotor edge, is independent whether the rotor lid has 2 more radial surfaces, the have a different function and define a different level and which for example - if necessary with the interposition of a suitable one Seal - for contact with the housing 7 receiving the spinning rotor 1 reach.
  • the recess 4 or 41 can be parallel to the rotor axis at both ends A (see Fig. 1) as well as on its sides in the circumferential direction of the Lid attachment 3 may be shaped in different ways. So are abrupt Transitions as possible as gradual transitions. The choice like this Ends or sides of the recess 4 or 41 are formed depends on the one hand depending on the manufacturing possibilities, but on the other hand it must That turbulence is taken in the air flow that affects the fiber separation and storage could have a negative impact. It has shown that there is an essentially radial boundary surface 42 (FIG. 2), in particular at the end of the recess facing the collar 40 4 or 41 has a particularly advantageous effect on the yarn loss.
  • the recess 4 or 41 is in the exemplary embodiments shown formed during the manufacture of the rotor lid 2, for example by appropriate shaping during the casting process or by cutting Forming. Also an essentially radial boundary surface 42 can be produced in this way during the manufacture of the rotor cover 2. But it can also be advantageously provided that the federal government 40 through the plate-like collar of a standard, interchangeable thread take-off nozzle (not shown) is formed, such a collar 40 extends correspondingly radially outwards so that it has the cutout 4 and 41 at their end facing away from the rotor lid 2 in the described Way limited.
  • the lid extension 3 in viewed in the axial direction can be formed briefly, without affecting the collar 40 and its beneficial effect must be dispensed with.
  • the cover extension 3 has a Outer contour on, including across its entire circumferential area the portion in which the collar 40 is located is unchanged. This is useful for manufacturing reasons alone, but usually also advantageous for the air flow within the spinning rotor 1. However, it does nothing to the contrary if the peripheral area of the lid extension 3 is different has trained areas.
  • the lid extension 3 in the area between the outlet mouth 50 of the fiber feed channel 5 and the beginning of the recess 4 or 41 on the one hand and the end face 31 of the cover extension 3 on the other hand Has fiber guide surface (not shown), which is relatively far in the direction extends to the inner peripheral wall 12 of the spinning rotor 1 and a larger one Distance from the thread take-off tube 6 than the remaining peripheral region the lid approach 3 to the orderly placement of the fibers on this inner peripheral surface Favor 12.
  • Following such a fiber guide surface can reduce the diameter of the lid approach 3 done on its normal outside diameter, this Diameter reduction partly also in the area of the federal government 40 can be enough.
  • the peripheral surface 30 of the cover extension 3 is not in line with that in FIGS 4 shown conical shape bound, but can optionally also one have cylindrical shape or different lengths Put the shape together, the recess 4 or 41 in a suitable Arranged in this peripheral surface 30 is independent of it special shape.
  • the special shape of the front side plays in a similar way 31 of the lid approach no role in connection with the training the recess 4 or 41 or the delimiting the recess 4 or 41 Federal 40th
  • Thread draw-off tube 6 which is at least partially in the lid attachment.
  • Thread take-off tube 6 can be interpreted in such a way that it too a conventional thread take-off nozzle or other thread guide in the cover attachment 3 serving elements such as B. an axial bore; an assignment etc. includes.

Description

Die vorliegende Erfindung betrifft eine Offenend-Spinnvorrichtung gemäß dem Oberbegriff des Anspruches 1 sowie einen Rotordeckel gemäß dem Oberbegriff des Anspruches 2.The present invention relates to an open-end spinning device according to the preamble of claim 1 and a rotor lid according to the Preamble of claim 2.

Durch die DE 24 19 670 A1 ist es bekannt, zwischen dem Spinnrotor und dem Rotordeckel in dem Bereich, in welchem der Faserspeisekanal mündet, einen engen Dichtungsspalt vorzusehen, während im übrigen Bereich ein relativ großer Abstand belassen werden soll. Es hat sich jedoch gezeigt, dass eine solche Abdichtung in Form eines engen Dichtungsspaltes zu nachteiligen Auswirkungen im Hinblick auf die Qualität des erzeugten Fadens führt.From DE 24 19 670 A1 it is known between the spinning rotor and the rotor lid in the area in which the fiber feed channel opens, to provide a tight sealing gap while in the rest of the area relatively large distance should be left. However, it has been shown that such a seal in the form of a narrow sealing gap adverse effects on the quality of the thread produced leads.

Die DE 29 31 567 A1 offenbart eine Offenend-Spinnvorrichtung mit einem Spinnrotor einem Rotordeckel mit einem Deckelansatz, einem Fadenabzugskanal und einem Faserspeisekanal, bei der eine mit einer Unterdruckquelle verbundene Absaugöffnung in den Deckelansatz des Rotordeckels innerhalb des Spinnrotors, vom Fadenabzugsweg getrennt, gegen die Innenwand des Rotors gerichtet ist. An die Absaugöffnung schließt sich ein gewinkelter Absaugkanal an welche eine, durch die Verbindung mit der Absaugöffnung, rückwärtig geöffnete Aussparung in dem Deckelansatz bildet, die auf ihrer dem Rotordeckel abgewandten seite durch einen Bund begrenzt ist. Aufgabe der vorliegenden Erfindung ist es eine Offenend-Spinnvorrichtung zu schaffen, die diese Nachteile vermeidet und mit deren Hilfe eine positive Beeinflussung der Garnqualität insbesondere im Hinblick auf seine Festigkeit erzielt wird.DE 29 31 567 A1 discloses an open-end spinning device with a Spinning rotor a rotor lid with a lid attachment, a thread take-off channel and a fiber feed channel, in which a suction port connected to a vacuum source in the lid extension of the rotor lid inside the Spinning rotor, separated from the thread take-off path, against the inner wall of the rotor is directed. An angled suction channel connects to the suction opening on which one, through the connection with the suction opening, forms a recess in the lid extension which is open at the rear, that is bounded on its side facing away from the rotor lid by a collar. The object of the present invention is an open-end spinning device to create, which avoids these disadvantages and with the help of a positive influence on the yarn quality especially with regard to its Strength is achieved.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 oder 2 gelöst. Es hat sich überraschenderweise gezeigt, dass durch eine Aussparung im Deckelansatz des Rotordeckels auf der dem freien Ende des Deckelansatzes zugewandten Seite die Garnqualität verbessert werden kann, insbesondere hinsichtlich der Garnfestigkeit und der Garngleichmäßigkeit.This object is achieved by the features of claim 1 or 2 solved. Surprisingly, it has been shown that a Recess in the lid extension of the rotor lid on the free end of the Lid approach facing the yarn quality can be improved can, especially with regard to yarn strength and yarn uniformity.

Vorteilhafterweise wird der den Bund aufweisende Längenbereich des Dekkelansatzes über seinen gesamten Umfang gemäß Anspruch 3 ausgebildet, was sowohl hinsichtlich der Fertigung, aber auch im Hinblick auf den Garnausfall von Vorteil ist.Advantageously, the length range of the cover attachment having the collar trained over its entire scope according to claim 3, what both in terms of production, but also in terms of Yarn loss is an advantage.

Vorzugsweise ist die erfindungsgemäße Aussparung nach einem oder mehreren der Ansprüche 4 bis 9 weitergebildet, da eine solche Ausbildung des Erfindungsgegenstandes überraschenderweise zu besonders guten Garnergebnissen führt.The recess according to the invention is preferably one or more of claims 4 to 9, since such a training of Subject of the invention surprisingly to particularly good yarn results leads.

Der Erfindungsgegenstand führt zu besseren Garnergebnissen, insbesondere hinsichtlich der Garnfestigkeit als auch der Garngleichmäßigkeit. Darüber hinaus ist die erfindungsgemäße Vorrichtung einfach herzustellen und kann bei Bedarf auch nachträglich durch Austausch des Rotordeckels in einer Offenend-Spinnmaschine zum Einsatz gebracht werden.The subject of the invention leads to better yarn results, in particular in terms of yarn strength and yarn uniformity. About that in addition, the device according to the invention is simple to manufacture and can also be retrofitted in a Open-end spinning machine can be used.

Ausführungsbeispiele der Erfindung werden nachstehend mit Hilfe von Zeichnungen erläutert. Es zeigen:

Figur 1
einen erfindungsgemäß ausgebildeten Rotordeckel in perspektivischer Ansicht;
Figur 2
den in Fig. 1 gezeigten Rotordeckel im Schnitt zusammen mit dem Spinnrotor und einem Teil seines Gehäuses;
Figur 3
eine Abwandlung des in den Fig. 1 und 2 gezeigten Rotordeckels in perspektivischer Ansicht; und
Figur 4
eine abgeänderte Ausbildung des in Fig.3 gezeigten Rotor deckels in der Frontansicht.
Exemplary embodiments of the invention are explained below with the aid of drawings. Show it:
Figure 1
a rotor lid designed according to the invention in a perspective view;
Figure 2
the rotor lid shown in Figure 1 in section together with the spinning rotor and part of its housing.
Figure 3
a modification of the rotor lid shown in Figures 1 and 2 in a perspective view. and
Figure 4
a modified design of the rotor lid shown in Figure 3 in the front view.

Fig. 2 zeigt einen Spinnrotor 1, der in bekannter und daher nicht gezeigter Weise mittels eines Schaftes 10 gelagert und angetrieben wird. Der Spinnrotor 1 selber befindet sich in einem Gehäuses 7, das an eine Unterdruckleitung 70 angeschlossen ist.Fig. 2 shows a spinning rotor 1, which is known and therefore not shown Way stored and driven by means of a shaft 10. The spinning rotor 1 itself is located in a housing 7, which is connected to a vacuum line 70 is connected.

Auf seiner dem Schaft 10 abgewandten Seite besitzt der Spinnrotor 1 eine offene Seite 11, die während des Spinnprozesses durch einen Rotordeckel 2 abgedeckt ist. Dieser weist auf seiner dem Spinnrotor 1 zugewandten Seite einen Deckelansatz 3 auf, der in die offene Seite 11 der Spinnrotors 1 hineinragt und einen Faserspeisekanal 5 aufnimmt, welcher eine gegen die Innenumfangswand 12 der Spinnrotors 1 gerichtete Eintrittsmündung 50 auf weist. Dieser Faserspeisekanal 5 hat die Aufgabe, dem Spinnrotor 1 Einzelfasern (nicht gezeigt) zuzuführen, die in einer Fasersammelrille 13 des Spinnrotors 1 gesammelt und in das Ende eines Fadens (ebenfalls nicht gezeigt) eingebunden werden, welcher kontinuierlich durch ein konzentrisch zum Deckelansatz 3 im Rotordeckel 2 angeordnetes Fadenabzugsrohr 6 aus dem Spinnrotor 1 abgeführt und auf einer nicht gezeigten Spule aufgewickelt wird.On its side facing away from the shaft 10, the spinning rotor 1 has one open side 11, which during the spinning process through a rotor lid 2 is covered. This has on its side facing the spinning rotor 1 a lid extension 3, which protrudes into the open side 11 of the spinning rotor 1 and receives a fiber feed channel 5 which one against the inner peripheral wall 12 of the spinning rotor 1 directed inlet mouth 50 has. This fiber feed channel 5 has the task of spinning the rotor 1 single fibers (not shown) to be fed into a fiber collecting groove 13 of the Spinning rotor 1 collected and in the end of a thread (also not shown) be involved, which is continuously by a concentric to the cover extension 3 in the rotor cover 2 arranged thread take-off tube 6 the spinning rotor 1 removed and wound on a spool, not shown becomes.

Wie die Fig. 1 und 2 zeigen, weist der Deckelansatz 3 eine konische Umfangsfläche 30 auf, die in einem Teilbereich durch eine Aussparung 4 unterbrochen ist. Diese Aussparung 4 reicht nicht bis an die dem Rotordeckel 2 abgewandte Stirnseite 31 des Deckelansatzes 3 heran, sondern wird von diesem durch einen Bund 40 getrennt gehalten.1 and 2 show, the cover extension 3 has a conical peripheral surface 30 on, which is interrupted in a partial area by a recess 4 is. This recess 4 does not extend to the rotor lid 2 facing end face 31 of the cover approach 3, but is from this is kept separate by a collar 40.

Der Transport der Fasern in den Spinnrotor 1 erfolgt mit Hilfe eines Luftstromes, der durch den an der Unterdruckleitung 70 anliegenden Unterdruck im Spinnrotor 1 erzeugt wird. Im Spinnrotor 1 müssen die Fasern von dem Luftstrom, mit dessen Hilfe sie in den Spinnrotor 1 gefördert wurden, getrennt und auf der Innenumfangswand 12 des Spinnrotors 1 abgelegt werden, längs welcher sie aufgrund der Konizität dieser Innenumfangswand 12 und der Drehgeschwindigkeit des während des Spinnprozesses mit hoher Drehzahl rotierenden Spinnrotors 1 in die Fasersammelrille 13 gleiten, um in das Ende des laufend abgezogenen Fadens eingebunden zu werden.The fibers are transported into the spinning rotor 1 with the aid of an air stream, the by the negative pressure applied to the vacuum line 70 in Spinning rotor 1 is generated. In the spinning rotor 1, the fibers must be removed from the air flow, with the help of which they were conveyed into the spinning rotor 1, separated and placed on the inner peripheral wall 12 of the spinning rotor 1, along which they due to the taper of this inner peripheral wall 12 and the rotational speed of the high speed during the spinning process rotating spinning rotor 1 into the fiber collecting groove 13 to slide into the To be integrated at the end of the thread that is continuously drawn.

Dieses Trennen der Fasern von dem Transportluftstrom erfolgt durch die Umlenkung dieses Transportluftstromes, während die Fasern aufgrund ihrer Masse und der hierdurch bedingten Trägheit ihren Flug in der bisherigen Transportrichtung bis zum Erreichen der Innenumfangswand 12 des Spinnrotors 1 fortsetzen. Damit die Fasern diese Innenumfangswand 12 in gestrecktem Zustand erreichen, wirkt der Transportluftstrom im Faserspeisekanal 5 mit hoher Intensität auf die Fasern ein. Dieser Luftstrom soll im Spinnrotor 1 seine Intensität in dem Maße verlieren, dass sein Einfluss auf die dem Spinnrotor 1 zugeführten Fasern rasch abnimmt und die Herauslösung der Fasern aus dem Transportluftstrom begünstigt. Dies wird mit Hilfe der Aussparung 4 erreicht. Sie weist in radialer Richtung einen größeren Abstand zu dem den Deckelansatz 3 umgebenden Spinnrotor 1 auf oder - anders ausgedrückt - einen geringeren radialen Abstand von dem sich bis in den Deckelansatz 3 erstreckenden Fadenabzugsrohr 6 als der restliche Bereich der Umfangsfläche 30 des Deckelansatzes 3. Die Luft hat hier mehr Raum zur Verfügung und kann sich somit ausdehnen und bewirkt auf diese Weise eine Reduzierung der Luftgeschwindigkeit, was das Herauslösen der Fasern aus dem Transportluftstrom begünstigt.This separation of the fibers from the transport air flow takes place through the Deflection of this transport air flow, while the fibers due to their Mass and the resulting inertia their flight in the previous Direction of transport until reaching the inner peripheral wall 12 of the spinning rotor 1 continue. So that the fibers stretch this inner peripheral wall 12 When the condition is reached, the transport air flow acts in the fiber feed channel 5 with high intensity on the fibers. This airflow is said to be in the spinning rotor 1 lose its intensity to the extent that its influence on the the fibers fed to the spinning rotor 1 rapidly decrease and the detachment which favors fibers from the transport air flow. This is done with the help of Cutout 4 reached. It has a larger distance in the radial direction to the spinning rotor 1 surrounding the cover extension 3 on or - differently expressed - a smaller radial distance from which to in the cover extension 3 extending thread take-off tube 6 as the remaining area the peripheral surface 30 of the lid extension 3. The air has more here Space is available and can thus expand and affect it Way a reduction in air speed, which is the detachment of the Fibers from the transport air flow favored.

Die die Luftexpansion bewirkende Aussparung 4 beginnt, bezogen auf die durch einen Pfeil f gekennzeichnete Drehrichtung des während des Spinnprozesses rotierenden Spinnrotors 1, bei dem gezeigten Ausführungsbeispiel zwischen 30° bis 130° nach der Austrittsmündung 50 des Faserspeisekanals 5. Der Beginn der Aussparung 4 hängt im Einzelfall von verschiedenen Faktoren wie Zuführgeschwindigkeit des Transportluftstromes, Durchmesser und Drehgeschwindigkeit des Spinnrotors 1 usw. ab. Die Aussparung 4 erstreckt sich über einen größeren Umfangsbereich des Deckelansatzes 3. Dieser Umfangsbereich ist in der Regel größer als der des Abstandes des Beginns der Aussparung nach dem Faserspeisekanal (Winkel α) und kann über mehr als drei Viertel des Umfanges des Deckelansatzes reichen, so dass bei einer solchen Ausbildung die Aussparung 4 in einem spitzen Winkel β vor der Austrittsmündung 50 des Faserspeisekanals 5 endet.The recess 4 causing the air expansion begins, based on the Direction of rotation indicated by an arrow f during the spinning process rotating spinning rotor 1, in the embodiment shown between 30 ° to 130 ° after the outlet mouth 50 of the fiber feed channel 5. The beginning of the recess 4 depends in individual cases on various factors such as the feed speed of the transport air flow, diameter and Speed of rotation of the spinning rotor 1, etc. The recess 4 extends over a larger circumferential area of the lid attachment 3. This The circumferential area is usually larger than that of the distance from the start the recess after the fiber feed channel (angle α) and can be more than three quarters of the circumference of the lid attachment are sufficient, so that one such training the recess 4 at an acute angle β before Exit mouth 50 of the fiber feed channel 5 ends.

Bei dem Ausführungsbeispiel gemäß den Fig. 1, 3 und 4 ist vorgesehen, dass ein Teil der Wandung 51 des Faserspeisekanals 5 die der offenen Seite 11 des Spinnrotors 1 gegenüberliegende Radialfläche 20 des Rotordeckels 2 überragt, damit der Faserspeisekanal 5 sehr flach in den Spinnrotor 1 einmünden kann. In einem derartigen Fall kann vorgesehen werden, dass die Aussparung 4 erst unmittelbar am Beginn dieser eine Erhebung bildenden Wandung 51 des Faserspeisekanals 5 endet.1, 3 and 4, it is provided that that part of the wall 51 of the fiber feed channel 5 that of the open Side 11 of the spinning rotor 1 opposite radial surface 20 of the rotor lid 2 protrudes so that the fiber feed channel 5 is very flat in the spinning rotor 1 can lead to. In such a case, it can be provided that that the recess 4 only immediately at the beginning of this survey forming wall 51 of the fiber feed channel 5 ends.

Nach der Trennung der Fasern vom Luftstrom wird die Luft der offenen Seite 11 des Spinnrotors 1 zugeführt, was durch die Wirkung des Unterdruckes erreicht wird, der mit Hilfe der unter Unterdruck stehenden Unterdruckleitung 70 in dem den Spinnrotor 1 umgebenden Gehäuse 7 zur Wirkung kommt. Der hierdurch im Gehäuse 7 erzeugte Unterdruck bewirkt, dass die im Spinnrotor 1 befindliche Luft zur offenen Seite 11 des Spinnrotors 1 gefördert wird und diesen hier in Richtung Gehäuse 7 verlässt.After the fibers are separated from the air flow, the air becomes the open side 11 of the spinning rotor 1, which is due to the action of negative pressure is achieved with the help of the negative pressure line under vacuum 70 comes into effect in the housing 7 surrounding the spinning rotor 1. The resulting negative pressure in the housing 7 causes that in the spinning rotor 1 air is conveyed to the open side 11 of the spinning rotor 1 and leave it here towards housing 7.

Überraschenderweise hat sich gezeigt, dass eine Begrenzung der Aussparung 4 an ihrem der Stirnseite 31 des Deckelansatzes 3 zugewandten Ende mit Hilfe des erwähnten Bundes 40 zur einer Verbesserung der Garnqualität führt, insbesondere im Hinblick auf die Festigkeit und die Gleichmäßigkeit des erzeugten Fadens.Surprisingly, it has been shown that a limitation of the recess 4 at its end facing the end face 31 of the cover extension 3 with the help of the aforementioned federal government 40 to improve the yarn quality leads, especially in terms of strength and uniformity of the thread produced.

Die zuvor beschriebene Vorrichtung ist nicht auf die erörterte Ausbildung beschränkt, sondern kann im Rahmen der vorliegenden Erfindung in vielerlei Weise abgewandelt werden. So ist es beispielsweise nicht erforderlich, dass sich die Aussparung 4 längs einer Mantellinie M des Deckelansatzes 3 erstreckt. Gemäß dem in den Fig. 3 und 4 gezeigten Ausführungsbeispiel ist eine Aussparung 41 vorgesehen, die in der Weise geneigt ist, dass sie - bezogen auf die durch den Pfeil f markierte Drehrichtung des Spinnrotors 1 - am Bund 40 beginnt und mit zunehmender Entfernung von der Austrittsmündung 50 des Faserspeisekanals 5 sich immer weiter vom Bund 40 entfernt und dem Rotordeckel 2 nähert. Auf diese Weise wird dem Umstand Rechnung getragen, dass die Luft im Spinnrotor 1 durch diesen bei seiner Rotation mitgenommen wird und seiner offenen Seite 11 längs einer Schraubenlinie zugeführt wird. Der Beginn der Aussparung 4 befindet sich auch hier an der Stelle, an welcher die Luftexpansion gewünscht wird, um die Luftgeschwindigkeit im Interesse einer sicheren Herauslösung der Fasern aus dem Transportluftstrom zu reduzieren, während die Neigung der Aussparung 41 die Abfuhr der Luft aus dem Inneren des Spinnrotors 1 begünstigt.The device described above is not limited to the training discussed, but can in many ways within the scope of the present invention To be modified. For example, it is not necessary for the Recess 4 extends along a generatrix M of the cover extension 3. According to the embodiment shown in FIGS. 3 and 4 is a recess 41 is provided, which is inclined in such a way that - in relation to the direction of rotation of the spinning rotor 1 marked by the arrow f - on the collar 40 begins and with increasing distance from the outlet mouth 50 of the The fiber feed channel 5 moves further and further away from the collar 40 and the rotor lid 2 approaches. In this way, the fact is taken into account that the air in the spinning rotor 1 is entrained by it during its rotation is and its open side 11 is fed along a helix. The beginning of the recess 4 is also at the point where the air expansion is desired to keep the air speed in the interest a safe removal of the fibers from the transport air flow reduce, while the inclination of the recess 41, the removal of air favored the inside of the spinning rotor 1.

In der Regel reicht der Platz zwischen der offenen Seite des Spinnrotors 1, d. h. dem Rotorrand, einerseits und der diesem Rotorrand gegenüberliegende Radialfläche 20 des Rotordeckels 2 andererseits aus, um die Luft im erforderlichen Maße aus dem Inneren des Spinnrotors 1 abzuführen. Die Aussparung 4 erstreckt sich deshalb gemäß dem in den Fig. 1 und 2 gezeigten Ausführungsbeispiel vom Bund 40 bis hin zu der der offenen Seite 11 des Spinnrotors 1 gegenüberliegenden Radialfläche 20 des Rotordeckels 2.As a rule, there is enough space between the open side of the spinning rotor 1, d. H. the rotor edge, on the one hand, and the one opposite this rotor edge Radial surface 20 of the rotor cover 2, on the other hand, to the air in the required Remove dimensions from inside the spinning rotor 1. The recess 4 therefore extends according to that shown in FIGS. 1 and 2 Embodiment from the collar 40 to that of the open side 11 of the Spinning rotor 1 opposite radial surface 20 of the rotor lid 2.

Unter "Radialfläche" 20 soll im Zusammenhang mit der vorliegenden Beschreibung jene Fläche des Rotordeckels 2 verstanden werden, welche der offenen Seite 11 des Spinnrotors 1, d. h. dem Rotorrand, gegenüberliegt unabhängig davon, ob der Rotordeckel 2 weitere Radialflächen aufweist, die eine andere Funktion haben und eine andere Ebene definieren und welche beispielsweise - gegebenenfalls unter Zwischenschaltung einer geeigneten Dichtung - zur Anlage an das den Spinnrotor 1 aufnehmende Gehäuse 7 gelangen."Radial surface" 20 is intended in connection with the present description that area of the rotor lid 2 can be understood, which the open side 11 of the spinning rotor 1, d. H. the rotor edge, is independent whether the rotor lid has 2 more radial surfaces, the have a different function and define a different level and which for example - if necessary with the interposition of a suitable one Seal - for contact with the housing 7 receiving the spinning rotor 1 reach.

Je nach den Luftverhä!tnissen im Spinnrotor 1 und im Gehäuse 7, die von verschiedenen Bedingungen wie z. B. Unterdruck, Rotordrehzahl, Rotordurchmesser etc. abhängen, kann es ausreichend sein, wenn sich die Aussparung 4 bzw. 41 im wesentlichen lediglich über jenen Längenbereich des Deckelansatzes 3 erstreckt, an welchem die Geschwindigkeitsreduzierung der Luft gewünscht wird. Dabei kann es u. U. durchaus ausreichend sein, wenn die Aussparung 4 bzw. 41 noch innerhalb des Spinnrotors 1, d. h. noch vor Erreichen von dessen offener Seite 11, endet, während bei anderen Voraussetzungen die Aussparung 4 bzw. 41 bis an die der offenen Seite 11 des Spinnrotors 1 gegenüberliegende Radialfläche 20 hinanreichen kann, wie dies zuvor mit Hilfe der Fig. 1 und 2 beschrieben wurde.Depending on the air conditions in the spinning rotor 1 and in the housing 7, which of various conditions such as B. vacuum, rotor speed, rotor diameter etc. depend, it may be sufficient if the recess 4 or 41 essentially only over that length range of Cover extension 3 extends on which the speed reduction the air is desired. It can u. U. may be sufficient if the recess 4 or 41 is still within the spinning rotor 1, d. H. yet before reaching its open page 11, while ends with other requirements the recess 4 or 41 to that of the open side 11 of the Spinning rotor 1 opposite radial surface 20 can reach, such as this was previously described with the aid of FIGS. 1 and 2.

In Einzelfällen, insbesondere bei Spinnrotoren 1 mit einem kleinen Durchmesser, kann es jedoch von Vorteil sein, wenn, wie dies am Beispiel der Aussparung 41 in Fig. 3 gezeigt wird, diese über die Radialfläche 20 des Rotordeckels 2 hinaus bis in eine dort vorgesehene Vertiefung 410 hineinragt.In individual cases, especially with spinning rotors 1 with a small diameter, However, it can be an advantage if, like the example of the Recess 41 is shown in Fig. 3, this over the radial surface 20 of the Rotor lid 2 protrudes into a recess 410 provided there.

Die Aussparung 4 bzw. 41 kann an ihren beiden Enden parallel zur Rotorachse A (siehe Fig. 1) ebenso wie an ihren Seiten in Umfangsrichtung des Deckelansatzes 3 in unterschiedlicher Weise geformt sein. So sind abrupte Übergänge ebenso möglich wie allmähliche Übergänge. Die Wahl, wie diese Enden oder Seiten der Aussparung 4 bzw. 41 ausgebildet werden, hängt einerseits von den Fertigungsmöglichkeiten ab, muss jedoch andererseits so getroffen werden, dass Turbulenzen in der Luftströmung, die sich auf die Fasertrennung und -ablage negativ auswirken könnten, vermieden werden. Es hat sich gezeigt, dass sich eine im wesentlichen radiale Begrenzungsfläche 42 (Fig. 2) insbesondere an dem Bund 40 zugewandten Ende der Aussparung 4 bzw. 41 auf den Garnausfall besonders vorteilhaft auswirkt. The recess 4 or 41 can be parallel to the rotor axis at both ends A (see Fig. 1) as well as on its sides in the circumferential direction of the Lid attachment 3 may be shaped in different ways. So are abrupt Transitions as possible as gradual transitions. The choice like this Ends or sides of the recess 4 or 41 are formed depends on the one hand depending on the manufacturing possibilities, but on the other hand it must That turbulence is taken in the air flow that affects the fiber separation and storage could have a negative impact. It has shown that there is an essentially radial boundary surface 42 (FIG. 2), in particular at the end of the recess facing the collar 40 4 or 41 has a particularly advantageous effect on the yarn loss.

Die Aussparung 4 bzw. 41 wird bei den gezeigten Ausführungsbeispielen während der Herstellung des Rotordeckels 2 gebildet, beispielsweise durch entsprechende Formgebung während des Gießverfahrens oder durch spanende Formung. Auch eine im wesentlichen radiale Begrenzungsfläche 42 lässt sich in dieser Weise während der Herstellung des Rotordeckels 2 erzeugen. Es kann aber auch vorteilhaft vorgesehen werden, dass der Bund 40 durch den tellerartigen Bund einer üblichen, austauschbaren Fadenabzugsdüse (nicht gezeigt) gebildet wird, wobei sich ein derartiger Bund 40 radial entsprechend weit nach außen erstreckt, damit er die Aussparung 4 bzw. 41 an ihrem dem Rotordeckel 2 abgewandten Ende in der beschriebenen Weise begrenzt. Besonders günstig ist eine derartige Ausgestaltung des Deckelansatzes 3 bei kleinen Spinnrotoren 1, beispielsweise mit einem Durchmesser der Fasersammelrille von 26 mm und weniger. Durch eine solche vorteilhafte Ausgestaltung der Erfindung kann der Deckelansatz 3 in axialer Richtung betrachtet kurz ausgebildet werden, ohne daß auf den Bund 40 und dessen vorteilhafte Wirkung verzichtet werden muß.The recess 4 or 41 is in the exemplary embodiments shown formed during the manufacture of the rotor lid 2, for example by appropriate shaping during the casting process or by cutting Forming. Also an essentially radial boundary surface 42 can be produced in this way during the manufacture of the rotor cover 2. But it can also be advantageously provided that the federal government 40 through the plate-like collar of a standard, interchangeable thread take-off nozzle (not shown) is formed, such a collar 40 extends correspondingly radially outwards so that it has the cutout 4 and 41 at their end facing away from the rotor lid 2 in the described Way limited. Such an embodiment of the Cover approach 3 for small spinning rotors 1, for example with a Diameter of the fiber collecting groove of 26 mm and less. By such advantageous embodiment of the invention, the lid extension 3 in viewed in the axial direction can be formed briefly, without affecting the collar 40 and its beneficial effect must be dispensed with.

Der Deckelansatz 3 weist gemäß den gezeigten Ausführungsbeispielen eine Außenkontur auf, die über ihren gesamten Umfangsbereich einschließlich des Teilbereichs, in welchem sich der Bund 40 befindet, unverändert ist. Dies ist schon aus Herstellungsgründen zweckmäßig, aber in der Regel auch für die Luftführung innerhalb des Spinnrotors 1 von Vorteil. Es steht dem jedoch nichts entgegen, wenn der Umfangsbereich des Deckelansatzes 3 verschieden ausgebildete Bereiche aufweist. Beispielsweise kann vorgesehen sein, dass der Deckelansatz 3 in dem Bereich zwischen der Austrittsmündung 50 des Faserspeisekanals 5 und dem Beginn der Aussparung 4 bzw. 41 einerseits und der Stirnseite 31 des Deckelansatzes 3 andererseits eine Faserführungsfläche (nicht gezeigt) aufweist, die sich relativ weit in Richtung zur Innenumfangswand 12 des Spinnrotors 1 erstreckt und einen größeren Abstand vom Fadenabzugsrohr 6 aufweist als der restliche Umfangsbereich des Deckelansatzes 3, um die geordnete Ablage der Fasern auf dieser Innenumfangsfläche 12 zu begünstigen. Im Anschluss an eine derartige Faserführungsfläche kann eine Reduzierung des Durchmessers des Deckelansatzes 3 auf seinen normalen Außendurchmesser erfolgen, wobei diese Durchmesserreduzierung teilweise auch bis in den Bereich des Bundes 40 reichen kann.According to the exemplary embodiments shown, the cover extension 3 has a Outer contour on, including across its entire circumferential area the portion in which the collar 40 is located is unchanged. This is useful for manufacturing reasons alone, but usually also advantageous for the air flow within the spinning rotor 1. However, it does nothing to the contrary if the peripheral area of the lid extension 3 is different has trained areas. For example, can be provided be that the lid extension 3 in the area between the outlet mouth 50 of the fiber feed channel 5 and the beginning of the recess 4 or 41 on the one hand and the end face 31 of the cover extension 3 on the other hand Has fiber guide surface (not shown), which is relatively far in the direction extends to the inner peripheral wall 12 of the spinning rotor 1 and a larger one Distance from the thread take-off tube 6 than the remaining peripheral region the lid approach 3 to the orderly placement of the fibers on this inner peripheral surface Favor 12. Following such a fiber guide surface can reduce the diameter of the lid approach 3 done on its normal outside diameter, this Diameter reduction partly also in the area of the federal government 40 can be enough.

Die Umfangsfläche 30 des Deckelansatzes 3 ist nicht an die in den Fig. 1 bis 4 gezeigte konische Form gebunden, sondern kann wahlweise auch eine zylindrische Form aufweisen oder sich aus Längenabschnitten unterschiedlicher Form zusammensetzen, wobei die Aussparung 4 bzw. 41 in geeigneter Weise in dieser Umfangsfläche 30 angeordnet ist unabhängig von deren spezieller Form. In ähnlicher Weise spielt auch die spezielle Form der Stimseite 31 des Deckelansatzes keine Rolle im Zusammenhang mit der Ausbildung der Aussparung 4 bzw. 41 oder des die Aussparung 4 bzw. 41 begrenzenden Bundes 40.The peripheral surface 30 of the cover extension 3 is not in line with that in FIGS 4 shown conical shape bound, but can optionally also one have cylindrical shape or different lengths Put the shape together, the recess 4 or 41 in a suitable Arranged in this peripheral surface 30 is independent of it special shape. The special shape of the front side plays in a similar way 31 of the lid approach no role in connection with the training the recess 4 or 41 or the delimiting the recess 4 or 41 Federal 40th

Zuvor ist mehrmals Bezug genommen worden auf ein Fadenabzugsrohr 6, das sich zumindest teilweise im Deckelansatz befindet. Hierbei soll der Begriff "Fadenabzugsrohr" 6 in der Weise interpretiert werden, dass er auch eine übliche Fadenabzugsdüse oder andere, der Fadenführung im Deckelansatz 3 dienende Elemente wie z. B. eine Axialbohrung; einen Einsatz etc. umfaßt.Previously, reference was made several times to a thread draw-off tube 6, which is at least partially in the lid attachment. Here the term "Thread take-off tube" 6 can be interpreted in such a way that it too a conventional thread take-off nozzle or other thread guide in the cover attachment 3 serving elements such as B. an axial bore; an assignment etc. includes.

Claims (9)

  1. Open-end spinning device with a spinning rotor (1) with an open side (11) that can be covered by a rotor cover (2), which features a cover protrusion (3) projecting into the inside of the spinning rotor (1), which accepts the outlet orifice (50) of a thread take-off tube (6) and has a section in a sector of its circumference where the cover protrusion (3) exhibits a greater spacing to the spinning rotor (1) than its remaining circumferential area such that the rotor cover (2) encompasses a radial area (20) that is designed in such a way that an intermediate space to extract the air from the spinning rotor remains between the radial surface (20) and the edge of the spinning rotor (1) while the section of the cover protrusion (3) with the greater spacing to the spinning rotor (1) is designed as a recess (4, 41) that is limited by a shoulder (40) on the side facing away from the rotor cover (2), characterised such that the recess (4, 41) is designed in such a way that it is closed rearward.
  2. Rotor cover for covering the open side (11) of a spinning rotor (1) of an open-end spinning device where the rotor cover (2) exhibits a cover protrusion (3) which extends over the cover and accepts the outlet orifice (50) of a thread feed channel (5) and a part of the thread take-off tube (6) and has a section in a segment of its circumference where the cover protrusion (3) is closer to the thread take-off tube (6) than the remaining circumferential area and the rotor cover (2) encompasses a radial area (20) that is designed in such a way that an intermediate space to extract the air from the spinning rotor (1) remains between the radial surface (20) and the edge of the spinning rotor (1), where the section of the cover protrusion (3) closer to the thread take-off tube (6) is designed as a recess (4, 41) that is limited by a shoulder (40) on the side facing away from the rotor cover (2), characterised such that the recess (4, 41) is designed such that it is closed rearward.
  3. Device in accordance with Patent Claim 1 or 2, characterised such that the cover protrusion (3) exhibits an essentially constant outer contour both in the section of its circumferential area (30) with the shoulder (40) as well as in the remaining circumferential area.
  4. Device in accordance with one or several of the Patent Claims 1 to 3, characterised such that the recess (4, 41) has an essentially radial limiting face (42) at the end facing towards the shoulder (40).
  5. Device in accordance with one or several of the Patent Claims 1 to 4, characterised such that the recess (4, 41) begins between 30° to 130° after the outlet orifice (50) of the thread feed channel (5) with respect to the direction of rotation (f) of the spinning rotor (1).
  6. Device in accordance with one or several of the Patent Claims 1 to 5, characterised such that the recess (4, 41) extends in circumferential direction of the cover protrusion (3) such that it ends in an acute angle (β) ahead of the outlet orifice (50) of the thread feed channel (5) with respect to the direction of rotation (f) of the spinning rotor (1).
  7. Device in accordance with one or several of the Patent Claims 1 to 6, characterised such that the recess (4, 41) essentially extends up to a section of the wall (51) of the thread feed channel (5) that projects over the radial surface (20) of the rotor cover (2).
  8. Device in accordance with one or several of the Patent Claims 1 to 7, characterised such that the recess (41) is inclined with respect to the surface line (M) of the cover protrusion (3) in such a way that - viewed in the direction of rotation (f) of the spinning rotor (1) - the start of the recess (41) is turned towards the shoulder (40) and its end towards the rotor cover (2).
  9. Device in accordance with one or several of the Patent Claims 1 to 8, characterised such that the recess (4, 41) extends up to a radial surface (20) of the rotor cover (2) covering the open side (11) of the spinning rotor (1).
EP01116884A 2000-08-04 2001-07-11 Open-end spinning machine and a rotor lid therefor Expired - Lifetime EP1178138B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10038863A DE10038863A1 (en) 2000-08-04 2000-08-04 Open-end spinning device and rotor lid
DE10038863 2000-08-04

Publications (2)

Publication Number Publication Date
EP1178138A1 EP1178138A1 (en) 2002-02-06
EP1178138B1 true EP1178138B1 (en) 2004-11-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01116884A Expired - Lifetime EP1178138B1 (en) 2000-08-04 2001-07-11 Open-end spinning machine and a rotor lid therefor

Country Status (3)

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US (1) US6497089B2 (en)
EP (1) EP1178138B1 (en)
DE (2) DE10038863A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH455597A (en) * 1967-09-27 1968-07-15 Rieter Ag Maschf Spinning device
FR2189546B1 (en) 1972-06-23 1974-10-25 Mulhouse Alsac Const Mec
DE2419670C2 (en) * 1974-04-24 1983-09-22 Stahlecker, Fritz, 7347 Bad Überkingen Open-end spinning unit
DE2931567C2 (en) * 1979-08-03 1989-11-23 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Open-end spinning device
DE2947480A1 (en) * 1979-11-24 1981-06-04 W. Schlafhorst & Co, 4050 Mönchengladbach Open=end spinning rotor with axial air exhaust port - forming part of yarn-withdrawal tube
DE19502917C2 (en) * 1995-01-31 2002-01-24 Fritz Stahlecker Thread take-off nozzle for OE spinning devices
DE19724882B4 (en) * 1997-06-12 2009-12-03 Maschinenfabrik Rieter Ag Adapter for open-end rotor spinning devices
DE19857160B4 (en) * 1998-12-11 2011-09-15 Maschinenfabrik Rieter Ag Apparatus for open-end spinning
DE19859164B4 (en) * 1998-12-21 2008-02-07 Oerlikon Textile Gmbh & Co. Kg Channel plate adapter for an open-end spinning device

Also Published As

Publication number Publication date
US6497089B2 (en) 2002-12-24
DE50104359D1 (en) 2004-12-09
US20020046558A1 (en) 2002-04-25
DE10038863A1 (en) 2002-02-14
EP1178138A1 (en) 2002-02-06

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