EP3754062B1 - Fibre bundle opening device for an open-end spinning device - Google Patents

Fibre bundle opening device for an open-end spinning device Download PDF

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Publication number
EP3754062B1
EP3754062B1 EP20180129.7A EP20180129A EP3754062B1 EP 3754062 B1 EP3754062 B1 EP 3754062B1 EP 20180129 A EP20180129 A EP 20180129A EP 3754062 B1 EP3754062 B1 EP 3754062B1
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Prior art keywords
support surface
opening roller
distance
fibre
sliver
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EP20180129.7A
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German (de)
French (fr)
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EP3754062A1 (en
Inventor
Andreas Jakobinski
Lothar Winzen
Florian Keuter
Jens Geerligs
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Saurer Spinning Solutions GmbH and Co KG
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Saurer Spinning Solutions GmbH and Co KG
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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
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
    • 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
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
    • D01H4/32—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls using opening rollers

Definitions

  • the present invention relates to a sliver opening device for an open-end spinning device comprising a feed trough, a sliver draw-in cylinder and an opening roller.
  • the fiber sliver draw-in cylinder is designed in connection with a clamping surface of the feed trough to transport a supply fiber sliver in the direction of the opening roller.
  • the feed trough has a support surface for fixing a fiber tuft that has been combed out by the opening roller.
  • the feeding trough also has a transition area with a convex curvature between the clamping surface and the supporting surface.
  • the DE 35 01 842 C2 describes, for example, a sliver opening device in which a cylindrical, preferably corrugated sliver intake cylinder with an associated feed trough forms a clamping area for the supply sliver.
  • the slowly revolving sliver draw-in cylinder feeds the supply sliver to a downstream opening roller at a constant transport speed.
  • the feed sliver which is preferably temporarily stored in sliver cans, first passes through a compressor on its way to the opening roller, which not only compresses the feed sliver, but also gives it a specific profile that is favorable for feeding.
  • the compressed supply sliver then runs into the clamping area formed by the sliver draw-in cylinder and the feed trough, which is usually wider than the supply sliver. This ensures that the supply sliver is also securely clamped in the edge areas.
  • a fiber tuft support is arranged following the clamping area. However, no more precise information is given about the geometry of the tuft support.
  • the DE 103 51 365 A1 discloses a feed trough for a sliver opening device of an open-end spinning device, with a concave clamping area, effective in connection with a sliver draw-in cylinder, for conveying a feed sliver, lateral guide walls for guiding the feed sliver and a concave support surface for fixing a fiber tuft processed by an opening roller by combing out, wherein the feed trough is pivotable about a pivot axis parallel to the axis of rotation of the opening roller.
  • the feed trough is designed and arranged in its working position in such a way that there is a gap width between the support surface and the adjacent tips of the opening roller set at a combing point of between 0.7 and 1.5 mm, which results over an angular range in the direction of rotation of the opening roller of at least 30 ° steadily reduced to a gap width of less than 0.5 millimeters. It is further explained that, in addition to the continuous gap reduction between the support surface and the tips of the opening roller set, the transition area that is brought as close as possible to the opening roller is particularly important. This is intended to counteract a backlog of the tuft, especially in the production of fancy yarn.
  • the sliver opening device according to the invention especially yarns synthetic fibers, especially polyester, with improved yarn values.
  • the yarns produced with the sliver opening device according to the invention have above all a higher yarn strength but also better uniformity than yarns produced with known sliver opening devices.
  • the support surface begins directly after the convex transition area.
  • the beginning of the support surface represents the combing point for the fibers.
  • Combing is a continuous process.
  • the combing-in point is the point at which the combing-in increases. This point is determined less by the distance from the opening roller and more by the deflection in the circumferential direction of the opening roller. This deflection is largely completed after passing through the convex transition area.
  • the yarn values can be further improved if the fibers are given more space in the area of the minimum distance between the support surface and tips of the opening roller set than is known in the prior art.
  • the support surface is generally dimensioned in such a way that the support surface is brought as close as possible to the tips of the opening roller set. With the distance, it is only necessary to ensure that the tips do not come into contact with the support surface. With such food troughs, the minimum distance is usually between 0.2 and 0.5 millimeters.
  • the minimum distance between the support surface and the circular cylindrical surface is greater than 0.5 millimeters, preferably greater than 0.6 millimeters.
  • the narrowing of the distance between the support surface and the circular cylindrical surface extends from the start of the support surface to the minimum distance over an angular range of less than 30° in the direction of rotation of the opening roller.
  • the support surface moves in the direction of rotation of the opening roller after reaching the minimum distance at a constant distance from the circular cylinder surface. This makes it possible, for example, to adjust the size of a dirt outlet opening following the tuft support.
  • the feed trough has lateral guide walls in the area of the support surface for guiding the supply sliver, which extend from the beginning to the end of the support surface.
  • This design makes sense above all in connection with an increased minimum distance between the support surface and the circular cylinder surface of the opening roller set.
  • the guide walls can then be brought as close as possible to the tips of the opening roller set.
  • An increased spacing of the support surface from the tips of the opening roller set can be realized between the guide walls.
  • a sliver draw-in cylinder 7 that can be rotated in the direction of arrow 6 .
  • the template sliver 4 which is usually in a not shown Sliver can is stored, directed via a compressor 9 in the direction of arrow 15 in a clamping zone, which is formed by the feed trough 11 and the sliver intake cylinder 7.
  • the first surface 14a viewed in the fiber transport direction, is planar or even. At the combing point, the surface 14a is at a distance from the circular cylindrical surface 13, on which the tips 12 of the opening roller set 3 lie, which is provided with the reference number 18. The distance is the perpendicular from the support surface 14 to the circular cylindrical surface 13 on which the tips 12 of the opening roller set 3 lie. This distance tapers down to a minimum distance in the fiber transport direction. In the illustrated In the exemplary embodiment, the distance between the planar partial surface 14a tapers down to the minimum distance 19.
  • the subsequent partial surface 14b is concave, that is to say curved inwards.

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

Description

Die vorliegende Erfindung betrifft eine Faserbandauflöseeinrichtung für eine Offenend-Spinnvorrichtung umfassend eine Speisemulde, einen Faserbandeinzugszylinder und eine Auflösewalze. Der Faserbandeinzugszylinder ist in Verbindung mit einer Klemmfläche der Speisemulde zum Transport eines Vorlagefaserbandes in Richtung der Auflösewalze ausgebildet. Die Speisemulde weist eine Stützfläche zur Fixierung eines durch die Auflösewalze durch Auskämmen bearbeiteten Faserbartes auf. Die Speisemulde weist außerdem zwischen der Klemmfläche und der Stützfläche einen Übergangsbereich mit einer konvexen Krümmung auf.The present invention relates to a sliver opening device for an open-end spinning device comprising a feed trough, a sliver draw-in cylinder and an opening roller. The fiber sliver draw-in cylinder is designed in connection with a clamping surface of the feed trough to transport a supply fiber sliver in the direction of the opening roller. The feed trough has a support surface for fixing a fiber tuft that has been combed out by the opening roller. The feeding trough also has a transition area with a convex curvature between the clamping surface and the supporting surface.

Faserbandauflöseeinrichtungen für Offenend-Spinnvorrichtungen sind in verschiedenen Ausführungsformen bekannt und in zahlreichen Patentschriften ausführlich erläutert.Sliver opening devices for open-end spinning devices are known in various embodiments and are explained in detail in numerous patents.

Die DE 35 01 842 C2 beschreibt bspw. eine Faserbandauflöseeinrichtung, bei der ein zylindrischer, vorzugsweise geriffelter Faserbandeinzugszylinder mit einer zugeordneten Speisemulde einen Klemmbereich für das Vorlagefaserband bildet. Der langsam umlaufende Faserbandeinzugszylinder führt dabei das Vorlagefaserband einer nachgeschalteten Auflösewalze mit einer konstanten Transportgeschwindigkeit zu. Das heißt, das vorzugsweise in Spinnkannen zwischengelagerte Vorlagefaserband durchläuft auf seinem Weg zur Auflösewalze zunächst einen Verdichter, der das Vorlagefaserband nicht nur verdichtet, sondern ihm auch ein bestimmtes für den Einzug günstiges Profil verleiht. Das verdichtete Vorlagefaserband läuft anschließend in den durch den Faserbandeinzugszylinder und die Speisemulde gebildeten Klemmbereich ein, der üblicherweise breiter als das Vorlagefaserband ist. Auf diese Weise wird gewährleistet, dass das Vorlagefaserband auch in den Randbereichen sicher geklemmt wird. Um zu verhindern, dass das Vorlagefaserband zu weit auseinanderläuft und in die Randbereiche der Auflösewalze gerät, wo aufgrund der auslaufenden Sägezahngarnitur eine sichere Auskämmung des Vorlagefaserbandes nicht mehr gegeben ist, ist im Anschluss an den Klemmbereich eine Faserbartstütze angeordnet. Es werden allerdings keine genaueren Angaben über die Geometrie der Faserbartstütze gemacht.the DE 35 01 842 C2 describes, for example, a sliver opening device in which a cylindrical, preferably corrugated sliver intake cylinder with an associated feed trough forms a clamping area for the supply sliver. The slowly revolving sliver draw-in cylinder feeds the supply sliver to a downstream opening roller at a constant transport speed. This means that the feed sliver, which is preferably temporarily stored in sliver cans, first passes through a compressor on its way to the opening roller, which not only compresses the feed sliver, but also gives it a specific profile that is favorable for feeding. The compressed supply sliver then runs into the clamping area formed by the sliver draw-in cylinder and the feed trough, which is usually wider than the supply sliver. This ensures that the supply sliver is also securely clamped in the edge areas. In order to prevent the feed sliver from running apart too far and getting into the edge areas of the opening roller, where the feed sliver can no longer be combed out reliably due to the outgoing sawtooth clothing, a fiber tuft support is arranged following the clamping area. However, no more precise information is given about the geometry of the tuft support.

Die DE 103 51 365 A1 offenbart eine Speisemulde für eine Faserbandauflöseeinrichtung einer Offenend-Spinnvorrichtung, mit einem in Verbindung mit einem Faserbandeinzugszylinder wirksamen konkav ausgebildeten Klemmbereich zum Fördern eines Vorlagefaserbandes, seitlichen Führungswänden zum Führen des Vorlagefaserbandes sowie einer konkav gewölbten Stützfläche zur Fixierung eines durch eine Auflösewalze durch Auskämmen bearbeiteten Faserbartes, wobei die Speisemulde um eine zur Rotationsachse der Auflösewalze parallele Schwenkachse schwenkbar ist. Die Speisemulde ist so ausgebildet und in ihrer Arbeitsstellung angeordnet, dass sich eine Spaltbreite zwischen der Stützfläche und den benachbarten Spitzen der Auflösewalzengarnitur an einem Einkämmpunkt zwischen 0,7 und 1,5 mm ergibt, die sich über einen Winkelbereich in Rotationsrichtung der Auflösewalze von mindestens 30° stetig auf eine Spaltbreite von weniger als 0,5 Millimeter verringert. Weiter wird erläutert, dass es neben der kontinuierlichen Spaltverringerung zwischen der Stützfläche und den Spitzen der Auflösewalzengarnitur vor allem auf den möglichst nahe an die Auflösewalze herangeführten Übergangsbereich ankommt. Dadurch soll vor allem bei der Herstellung von Effektgarn einem Rückstau des Faserbartes entgegengewirkt werden.the DE 103 51 365 A1 discloses a feed trough for a sliver opening device of an open-end spinning device, with a concave clamping area, effective in connection with a sliver draw-in cylinder, for conveying a feed sliver, lateral guide walls for guiding the feed sliver and a concave support surface for fixing a fiber tuft processed by an opening roller by combing out, wherein the feed trough is pivotable about a pivot axis parallel to the axis of rotation of the opening roller. The feed trough is designed and arranged in its working position in such a way that there is a gap width between the support surface and the adjacent tips of the opening roller set at a combing point of between 0.7 and 1.5 mm, which results over an angular range in the direction of rotation of the opening roller of at least 30 ° steadily reduced to a gap width of less than 0.5 millimeters. It is further explained that, in addition to the continuous gap reduction between the support surface and the tips of the opening roller set, the transition area that is brought as close as possible to the opening roller is particularly important. This is intended to counteract a backlog of the tuft, especially in the production of fancy yarn.

Es ist die Aufgabe der vorliegenden Erfindung eine Faserbandauflöseeinrichtung zu schaffen, die die Qualität des hergestellten Garnes verbessert.It is the object of the present invention to provide a sliver opening device which improves the quality of the yarn produced.

Zur Lösung der gestellten Aufgabe wird eine Faserbandauflöseeinrichtung für eine Offenend-Spinnvorrichtung vorgeschlagen, die eine Speisemulde, einen Faserbandeinzugszylinder und eine Auflösewalze mit einer Auflösewalzengarnitur, deren Spitzen auf einer Kreiszylinderfläche liegen, umfasst. Der Faserbandeinzugszylinder ist in Verbindung mit einer Klemmfläche der Speisemulde zum Transport eines Vorlagefaserbandes in Richtung der Auflösewalze ausgebildet. Die Speisemulde weist eine Stützfläche zur Fixierung eines durch die Auflösewalze durch Auskämmen bearbeiteten Faserbartes auf. Der Abstand der Stützfläche von der Kreiszylinderfläche verjüngt sich in Fasertransportrichtung bis auf einen minimalen Abstand. Die Speisemulde weist zwischen der Klemmfläche und der Stützfläche einen Übergangsbereich mit einer konvexen Krümmung auf. Der minimale Abstand der Stützfläche von der Kreiszylinderfläche ist kleiner als 1,5 Millimeter. Erfindungsgemäß weist die Stützfläche in Fasertransportrichtung gesehen an ihrem Beginn von der Kreiszylinderfläche einen Abstand zwischen 4 und 8 Millimeter auf.A sliver opening device for an open-end spinning device is proposed to solve the task, which comprises a feed trough, a sliver draw-in cylinder and an opening roller with an opening roller set whose tips lie on a circular cylinder surface. The fiber sliver draw-in cylinder is designed in connection with a clamping surface of the feed trough to transport a supply fiber sliver in the direction of the opening roller. The feed trough has a support surface for fixing a fiber tuft that has been combed out by the opening roller. The distance between the support surface and the circular cylinder surface tapers down to a minimum distance in the fiber transport direction. Between the clamping surface and the supporting surface, the feeding trough has a transition area with a convex curvature. The minimum distance between the support surface and the circular cylinder surface is less than 1.5 millimeters. According to the invention, the support surface has a distance of between 4 and 8 millimeters at its beginning from the circular cylindrical surface, viewed in the fiber transport direction.

Mit der erfindungsgemäßen Faserbandauflöseeinrichtung können vor allem Garne aus synthetischen Fasern, insbesondere aus Polyester, mit verbesserten Garnwerten hergestellt werden. Die mit der erfindungsgemäßen Faserbandauflöseeinrichtung hergestellten Garne weisen vor allem eine höhere Garnfestigkeit aber auch eine bessere Gleichmäßigkeit auf als mit bekannten Faserbandauflöseeinrichtungen hergestellte Garne.With the sliver opening device according to the invention, especially yarns synthetic fibers, especially polyester, with improved yarn values. The yarns produced with the sliver opening device according to the invention have above all a higher yarn strength but also better uniformity than yarns produced with known sliver opening devices.

Wichtig ist dabei ein ausreichender Abstand der Stützfläche von den Spitzen der Auflösewalzengarnitur, insbesondere im Einlaufbereich der Faserbartstütze. Durch einen ausreichenden Abstand werden die Fasern geschont und Beschädigungen, die die Garnqualität negativ beeinflussen, vermieden. Die beanspruchten oberen Grenzen für den Abstand stellen einen zuverlässigen Transport der Fasern durch die Auflösewalze sicher.A sufficient distance between the support surface and the tips of the opening roller set is important, particularly in the inlet area of the tuft support. Sufficient spacing protects the fibers and avoids damage that negatively affects yarn quality. The claimed upper limits for the distance ensure reliable transport of the fibers through the opening roller.

Die Stützfläche beginnt direkt im Anschluss an den konvexen Übergangsbereich. Der Beginn der Stützfläche stellt den Einkämmpunkt für die Fasern dar. Das Einkämmen ist ein kontinuierlicher Prozess. Der Einkämmpunkt ist dabei der Punkt, an dem das Einkämmen verstärkt einsetzt. Dieser Punkt ist weniger durch den Abstand zur Auflösewalze bestimmt, als mehr durch die Umlenkung in die Umfangsrichtung der Auflösewalze. Diese Umlenkung ist nach dem Durchlaufen des konvexen Übergangsbereichs weitestgehend abgeschlossen.The support surface begins directly after the convex transition area. The beginning of the support surface represents the combing point for the fibers. Combing is a continuous process. The combing-in point is the point at which the combing-in increases. This point is determined less by the distance from the opening roller and more by the deflection in the circumferential direction of the opening roller. This deflection is largely completed after passing through the convex transition area.

Die Garnwerte können weiter verbessert werden, wenn man den Fasern auch im Bereich des minimalen Abstandes der Stützfläche von Spitzen der Auflösewalzengarnitur mehr Platz gibt als im Stand der Technik bekannt. Gemäß dem Stand der Technik wird die Stützfläche in der Regel so dimensioniert, dass die Stützfläche so nah wie möglich an die Spitzen der Auflösenwalzengarnitur herangeführt wird. Bei dem Abstand ist dann nur sicherzustellen, dass eine Berührung der Spitzen mit der Stützfläche sicher verhindert wird. Bei solchen Speisemulden liegt der minimale Abstand in Regel zwischen 0,2 und 0,5 Millimeter.The yarn values can be further improved if the fibers are given more space in the area of the minimum distance between the support surface and tips of the opening roller set than is known in the prior art. According to the prior art, the support surface is generally dimensioned in such a way that the support surface is brought as close as possible to the tips of the opening roller set. With the distance, it is only necessary to ensure that the tips do not come into contact with the support surface. With such food troughs, the minimum distance is usually between 0.2 and 0.5 millimeters.

Im Rahmen der vorliegenden Erfindung hat sich jedoch als besonders vorteilhaft erwiesen den minimalen Abstand der Stützfläche von der Kreiszylinderfläche größer als 0,5 Millimeter, vorzugsweise größer als 0,6 Millimeter, zu wählen.In the context of the present invention, however, it has proven to be particularly advantageous to choose the minimum distance between the support surface and the circular cylindrical surface to be greater than 0.5 millimeters, preferably greater than 0.6 millimeters.

Gemäß einer vorteilhaften Ausführungsform erstreckt sich die Verjüngung des Abstandes der Stützfläche von der Kreiszylinderfläche vom Beginn der Stützfläche bis zu dem minimalen Abstand über einen Winkelbereich in Rotationsrichtung der Auflösewalze von weniger als 30°. Hierbei ist es durchaus möglich, dass sich die Stützfläche in Rotationsrichtung der Auflösewalze nach Erreichen des minimalen Abstandes im konstanten Abstand zu der Kreiszylinderfläche fortsetzt. Dadurch ist es zum Beispiel möglich die Größe einer auf die Faserbartstütze folgenden Schmutzaustrittsöffnung einzustellen.According to an advantageous embodiment, the narrowing of the distance between the support surface and the circular cylindrical surface extends from the start of the support surface to the minimum distance over an angular range of less than 30° in the direction of rotation of the opening roller. In this case, it is quite possible that the support surface moves in the direction of rotation of the opening roller after reaching the minimum distance at a constant distance from the circular cylinder surface. This makes it possible, for example, to adjust the size of a dirt outlet opening following the tuft support.

Die Stützfläche kann dabei von ihrem Beginn bis zu ihrem Ende als konkave Fläche ausgebildet sein. Es ist aber von Vorteil, um den breiten Einlaufbereich zu realisieren, wenn die Stützfläche an ihrem Beginn, vorzugsweise von ihrem Beginn bis zum Erreichen des minimalen Abstandes von der Kreiszylinderfläche, als plane Fläche ausgebildet ist. An die plane Fläche kann sich dann eine konkave Fläche anschließen. Je nach Ausbildung kann die konkave Fläche einen konstanten Abstand von der Kreiszylinderfläche aufweisen oder sich mit einen verjüngendem Abstand fortsetzen.The support surface can be designed as a concave surface from its beginning to its end. However, in order to realize the wide inlet area, it is advantageous if the supporting surface is designed as a flat surface at its beginning, preferably from its beginning until the minimum distance from the circular cylindrical surface is reached. A concave surface can then adjoin the flat surface. Depending on the design, the concave surface can have a constant distance from the circular cylinder surface or can continue with a tapering distance.

Gemäß einer vorteilhaften Ausführungsform geht die plane Fläche tangential in die konkave Fläche über. Dadurch wird eine abrupte Änderung des Abstandes zwischen der Stützfläche und der Auflösewalze vermieden, was sich positiv auf die Garnqualität auswirkt.According to an advantageous embodiment, the flat surface merges tangentially into the concave surface. This avoids an abrupt change in the distance between the support surface and the opening roller, which has a positive effect on the yarn quality.

Es ist bekannt im Übergangsbereich zwischen der Klemmfläche und der Stützfläche, gegebenenfalls seitliche Führungswände zum Führen des Vorlagefaserbandes anzuordnen. Dadurch soll ein Auswandern des Vorlagefaserbandes während des Auskämmens verhindert werden. Um das gewährleisten zu können ist der Abstand zwischen den beiden seitlichen Führungswänden kleiner als die axiale Ausdehnung der Auflösewalze. Das heißt, die seitlichen Führungswände stehen der Umfangsfläche der Auflösewalze gegenüber.It is known in the transition area between the clamping surface and the supporting surface to optionally arrange lateral guide walls for guiding the supply fiber sliver. This is intended to prevent the supply sliver from migrating during combing out. In order to be able to ensure this, the distance between the two lateral guide walls is smaller than the axial extent of the opening roller. This means that the lateral guide walls face the peripheral surface of the opening roller.

Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Faserbandauflöseeinrichtung weist die Speisemulde im Bereich der Stützfläche seitliche Führungswände zum Führen des Vorlagefaserbandes auf, die sich vom Beginn bis zum Ende der Stützfläche erstrecken. Diese Ausführung ist vor allem in Verbindung mit einem vergrößerten minimalen Abstand der Stützfläche von der Kreiszylinderfläche der Auflösewalzengarnitur sinnvoll. Die Führungswände können dann möglichst nah an die Spitzen der Auflösewalzengarnitur herangeführt werden. Zwischen den Führungswänden kann ein erhöhter Abstand der Stützfläche von den Spitzen der Auflösewalzengarnitur realisiert werden.According to a preferred embodiment of the sliver opening device according to the invention, the feed trough has lateral guide walls in the area of the support surface for guiding the supply sliver, which extend from the beginning to the end of the support surface. This design makes sense above all in connection with an increased minimum distance between the support surface and the circular cylinder surface of the opening roller set. The guide walls can then be brought as close as possible to the tips of the opening roller set. An increased spacing of the support surface from the tips of the opening roller set can be realized between the guide walls.

Die vorliegende Erfindung wird nachfolgend anhand eines in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
eine Vorderansicht auf eine erfindungsgemäße Faserbandauflöseeinrichtung;
Fig. 2
eine dreidimensionale Darstellung eines Auflösewalzengehäuses mit einer erfindungsgemäßen Speisemulde;
Fig. 3
eine Detailansicht der erfindungsgemäßen Faserbandauflöseeinrichtung.
The present invention is explained in more detail below using an exemplary embodiment illustrated in the figures. Show it:
1
a front view of a sliver opening device according to the invention;
2
a three-dimensional representation of an opening roller housing with a feed trough according to the invention;
3
a detailed view of the sliver opening device according to the invention.

Die Fig. 1 zeigt ein Auflösewalzengehäuse 1 einer Faserbandauflöseeinrichtung für eine Offenend-Spinnvorrichtung. In diesem Auflösewalzengehäuse 1 ist eine Auflösewalze 2 um eine Rotationsachse 22 rotierbar gelagert. Die Auflösewalze 2 weist auf ihrem Außenumfang eine sogenannte Auflösewalzengarnitur 3 zum Auskämmen eines Vorlagefaserbandes 4 auf. Die Auflösewalzengarnitur 3 umfasst Zähne, deren Spitzen auf einer Kreiszylinderfläche 13 liegen, die die Auflösewalze 2 begrenzt. Die Auflösewalze 2 läuft während des Spinnbetriebes in Richtung des Pfeiles 5 um.the 1 shows an opening roller housing 1 of a sliver opening device for an open-end spinning device. An opening roller 2 is mounted in this opening roller housing 1 so that it can rotate about an axis of rotation 22 . The opening roller 2 has a so-called opening roller set 3 on its outer circumference for combing out a feed fiber sliver 4 . The opening roller set 3 includes teeth whose tips lie on a circular cylindrical surface 13 that delimits the opening roller 2 . The opening roller 2 rotates in the direction of the arrow 5 during spinning.

Im oder am Auflösewalzengehäuse 1 ist außerdem ein in Richtung des Pfeiles 6 rotierbarer Faserbandeinzugszylinder 7 gelagert. Dieser korrespondiert mit einer Klemmfläche 10 einer Speisemulde 11, die mittels eines Speisenmuldenhalters 8 schwenkbar gelagert ist. Wie in Fig. 1 angedeutet, wird das Vorlagefaserband 4, das üblicherweise in einer nicht dargestellten Spinnkanne bevorratet ist, über einen Verdichter 9 in Richtung des Pfeils 15 in eine Klemmzone geleitet, die durch die Speisemulde 11 und den Faserbandeinzugszylinder 7 gebildet wird. Der Speisemuldenhalter 8 mit der Speisemulde 11 ist um eine Schwenkachse 16 begrenzt beweglich gelagert und wird dabei durch ein (nicht dargestelltes) Federelement in Richtung des Pfeiles 17 entgegengesetzt zu dieser Bewegungsrichtung beaufschlagt. Die Speisemulde 11 drückt das Vorlagefaserband 4 an den in Richtung des Pfeiles 6 umlaufenden Faserbandeinzugszylinder 7. Der Faserbandeinzugszylinder 7 fördert das Vorlagefaserband 4 in den Bereich der Auflösewalze 2, deren Auflösewalzengarnitur 3 das Vorlagefaserband 4 in Einzelfasern auskämmt, die anschließend, wie bekannt, an einer Schmutzaustrittsöffnung 24 vorbeilaufen und über einen Faserleitkanal 25 auf einen Spinnrotor aufgespeist werden (s. Fig. 2).Also mounted in or on the opening roller housing 1 is a sliver draw-in cylinder 7 that can be rotated in the direction of arrow 6 . This corresponds to a clamping surface 10 of a food trough 11 which is pivotally mounted by means of a food trough holder 8 . As in 1 indicated, the template sliver 4, which is usually in a not shown Sliver can is stored, directed via a compressor 9 in the direction of arrow 15 in a clamping zone, which is formed by the feed trough 11 and the sliver intake cylinder 7. The food trough holder 8 with the food trough 11 is mounted so that it can move to a limited extent about a pivot axis 16 and is acted upon by a spring element (not shown) in the direction of arrow 17 opposite to this direction of movement. The feed trough 11 presses the supply sliver 4 against the sliver draw-in cylinder 7 rotating in the direction of arrow 6. The sliver draw-in cylinder 7 conveys the supply sliver 4 into the area of the opening roller 2, whose opening roller set 3 combs out the supply sliver 4 into individual fibers which, as is known, are then fed to a run past the dirt outlet opening 24 and are fed to a spinning rotor via a fiber guide channel 25 (see Fig. 2 ).

In Fig. 3 ist die Speisemulde 11 und ihre Anordnung im Verhältnis zum Faserbandeinzugszylinder 7 und zur Auflösewalze 2 genauer dargestellt. In dem darstellten Ausführungsbeispiel ist die Speisemulde 11 lösbar mit dem Speisemuldenhalter 8 verbunden, wie zum Beispiel auch aus der DE 10 2017 118 392 A1 bekannt ist. Im Rahmen der vorliegenden Erfindung können die Speisemulde 11 und der Speisemuldenhalter 8 auch einstückig ausgebildet sein oder die Speisemulde 11 kann aus mehreren Teilen bestehen, die mittels des Speisemuldenhalters 8 miteinander verbunden werden.In 3 the feed trough 11 and its arrangement in relation to the sliver intake cylinder 7 and the opening roller 2 is shown in more detail. In the illustrated embodiment, the feed trough 11 is releasably connected to the feed trough holder 8, such as from FIG DE 10 2017 118 392 A1 is known. Within the scope of the present invention, the feeding trough 11 and the feeding trough holder 8 can also be designed in one piece or the feeding trough 11 can consist of several parts which are connected to one another by means of the feeding trough holder 8 .

Der Faserbandeinzugszylinder 7 transportiert das Vorlagefaserband 4 in Verbindung mit der Klemmfläche 10 der Speisemulde 11 in Richtung der Auflösewalze 2. Der Klemmfläche 10 der Speisemulde 11 folgend durchläuft das Vorlagefaserband 4 einen Übergangsbereich 20 der Speisemulde 11 mit einer konvexen, das heißt nach außen gewölbten, Krümmung. Am Ende des Übergangsbereichs 20, das heißt nach dem Ende der konvexen Krümmung, beginnt eine Stützfläche 14 zur Fixierung des von der Auflösewalze 2 bearbeiteten Faserbartes. Zwischen dem Übergangsbereich 20 und der Stützfläche 14 liegt der Einkämmpunkt. Die Stützfläche 14 umfasst in dem dargestellten Ausführungsbeispiel zwei Teilflächen 14a und 14b. Die in Fasertransportrichtung gesehen erste Fläche 14a ist plan bzw. eben ausgebildet. Am Einkämmpunkt hat die Fläche 14a von der Kreiszylinderfläche 13, auf der die Spitzen 12 der Auflösewalzengarnitur 3 liegen, einen Abstand, der mit dem Bezugszeichen 18 versehen ist. Der Abstand ist dabei das Lot von der Stützfläche 14 auf die Kreiszylinderfläche 13, auf der die Spitzen 12 der Auflösewalzengarnitur 3 liegen. Dieser Abstand verjüngt sich in Fasertransportrichtung bis auf einen minimalen Abstand. In dem dargestellten Ausführungsbeispiel verjüngt sich der Abstand der planen Teilfläche 14a bis auf den minimalen Abstand 19. Die folgende Teilfläche 14b ist konkav, das heißt nach innen gewölbt ausgebildet. Die Fläche 14b ist ebenfalls als Kreiszylinderfläche ausgebildet, wobei die Mittenachse der Rotationachse 22 der Auflösewalze 2 entspricht. Das heißt, der Abstand der Fläche 14b von der Kreiszylinderfläche 13, auf der die Spitzen 12 der Auflösewalzengarnitur 3 liegen, entspricht durchgängig dem minimalen Abstand 19. Erfindungsgemäß liegt der Abstand 18 zwischen 4 und 8 Millimeter und der Abstand 19 ist kleiner ist als 1,5 Millimeter. In dem dargestellten Ausführungsbeispiel ist außerdem der Abstand 19 größer als 0,6 Millimeter.The sliver draw-in cylinder 7 transports the feed sliver 4 in connection with the clamping surface 10 of the feed trough 11 in the direction of the opening roller 2. Following the clamping surface 10 of the feed trough 11, the feed sliver 4 runs through a transition area 20 of the feed trough 11 with a convex, i.e. outwardly curved, curvature . At the end of the transition area 20, ie after the end of the convex curvature, a support surface 14 for fixing the fiber tuft processed by the opening roller 2 begins. The combing-in point is between the transition region 20 and the support surface 14 . In the exemplary embodiment shown, the support surface 14 comprises two partial surfaces 14a and 14b. The first surface 14a, viewed in the fiber transport direction, is planar or even. At the combing point, the surface 14a is at a distance from the circular cylindrical surface 13, on which the tips 12 of the opening roller set 3 lie, which is provided with the reference number 18. The distance is the perpendicular from the support surface 14 to the circular cylindrical surface 13 on which the tips 12 of the opening roller set 3 lie. This distance tapers down to a minimum distance in the fiber transport direction. In the illustrated In the exemplary embodiment, the distance between the planar partial surface 14a tapers down to the minimum distance 19. The subsequent partial surface 14b is concave, that is to say curved inwards. The surface 14b is also designed as a circular cylindrical surface, with the central axis corresponding to the axis of rotation 22 of the opening roller 2 . That is, the distance of the surface 14b from the circular cylindrical surface 13, on which the tips 12 of the opening roller set 3 lie, consistently corresponds to the minimum distance 19. According to the invention, the distance 18 is between 4 and 8 millimeters and the distance 19 is less than 1, 5 millimeters. In the illustrated embodiment, the distance 19 is also greater than 0.6 millimeters.

Die Verjüngung des Abstandes der Stützfläche 14 oder genauer gesagt der Teilfläche 14a von der Kreiszylinderfläche 13 vom Beginn der Stützfläche 14 bis zu dem minimalen Abstand 19 erstreckt sich über einen Winkelbereich in Rotationsrichtung der Auflösewalze 2, der mit dem Bezugszeichen 21 gekennzeichnet ist. Dieser Winkelbereich 21 ist in dem dargestellten Ausführungsbeispiel kleiner als 30°.The tapering of the distance between the supporting surface 14 or more precisely the partial surface 14a from the circular cylindrical surface 13 from the start of the supporting surface 14 to the minimum distance 19 extends over an angular range in the direction of rotation of the opening roller 2, which is identified by the reference numeral 21. This angular range 21 is less than 30° in the exemplary embodiment shown.

Die in Fig. 2 und in Fig. 3 dargestellte Speisemulde 11 weist im Bereich der Stützfläche 14 außerdem seitliche Führungswände 23 zum Führen des Vorlagefaserbandes 4 auf, die sich vom Beginn bis zum Ende der Stützfläche 14, das heißt über beide Teilflächen 14a und 14b, erstrecken.In the 2 and in 3 The feed trough 11 shown also has lateral guide walls 23 in the area of the support surface 14 for guiding the supply sliver 4, which extend from the beginning to the end of the support surface 14, ie over both partial surfaces 14a and 14b.

BezugszeichenlisteReference List

11
Auflösewalzengehäuseopening roller housing
22
Auflösewalzeopening roller
33
Auflösewalzengarnituropening roller set
44
Vorlagefaserbandsupply sliver
55
Pfeilarrow
66
Pfeilarrow
77
Faserbandeinzugszylindersliver feed cylinder
88th
Speisemuldenhalterpan holder
99
Verdichtercompressor
1010
Klemmflächeclamping surface
1111
Speisemuldepantry
1212
Spitzen der AuflösewalzengarniturTips of the opening roller set
1313
Kreiszylinderflächecircular cylinder surface
1414
Stützflächesupport surface
1515
Pfeilarrow
1616
Schwenkachsepivot axis
1717
Pfeilarrow
1818
Abstanddistance
1919
Abstanddistance
2020
Übergangsbereichtransition area
2121
Winkelangle
2222
Rotationsachse der AuflösewalzeAxis of rotation of the opening roller
2323
seitliche Führungswändelateral guide walls
2424
Schmutzaustrittsöffnungdirt outlet opening
2525
Faserleitkanalfiber guide channel

Claims (8)

  1. A fibre band opening device for an open-end spinning device, comprising
    a feed tray (11),
    a fibre band pull-in cylinder (7) and
    an opening roller (2) having an opening roller clothing (3), the tips (12) of which lie on a circular cylindrical surface (13), wherein
    the fibre band pull-in cylinder (7) is designed to transport, in conjunction with a clamping surface (10) of the feed tray (11), a feed fibre band (4) towards the opening roller (2),
    the feed tray (11) has a support surface (14) for fixing a fibre tuft, which is processed by the opening roller (2) by combing, and the distance of the support surface (14) from the circular cylindrical surface (13) is tapered in the fibre transport direction to a minimum distance, and the feed tray (11) has a transition area (20) having a convex curvature between the clamping surface (10) and the support surface (14), and the minimum distance (19) of the support surface (14) from the circular cylindrical surface (13) is less than 1.5 millimetres
    characterised in that
    the support surface (14) has a distance (18) of between 4 and 8 millimetres from the circular cylindrical surface (13) at the beginning of the support surface (14) with respect to the fibre transport direction.
  2. The fibre band opening device according to claim 1, characterised in that the minimum distance (19) of the support surface (14) from the circular cylindrical surface (13) is greater than 0.5 millimetres, preferably greater than 0.6 millimetres.
  3. The fibre band opening device according to one of the preceding claims, characterised in that the tapering of the distance of the support surface (14) from the circular cylindrical surface (13) from the beginning of the support surface (14) to the minimum distance (19) extends over an angle range of less than 30° in the direction of rotation of the opening roller (2).
  4. The fibre band opening device according to one of the preceding claims, characterised in that the support surface (14) is designed as a flat surface (14a) from the beginning of the support surface (14) until the minimum distance from the circular cylindrical surface (13) is reached.
  5. The fibre band opening device according to one of the preceding claims, characterised in that the support surface (14) continues in the fibre transport direction at a constant distance from the circular cylindrical surface (13) after the minimum distance (19) has been reached.
  6. The fibre band opening device according to one of the preceding claims, characterised in that the support surface (14) comprises a concave surface (14b).
  7. The fibre band opening device according to one of the preceding claims, characterised in that the support surface comprises a flat surface (14a), which transitions tangentially into a concave surface (14b).
  8. The fibre band opening device according to one of the preceding claims, characterised in that the feed tray (11) has, in the area of the support surface (14), lateral guide walls (23) for guiding the feed fibre band (4), which extend from the beginning to the end of the support surface (14).
EP20180129.7A 2019-06-19 2020-06-16 Fibre bundle opening device for an open-end spinning device Active EP3754062B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019116584.9A DE102019116584A1 (en) 2019-06-19 2019-06-19 Sliver opening device for an open-end spinning device and feed trough for the sliver opening device

Publications (2)

Publication Number Publication Date
EP3754062A1 EP3754062A1 (en) 2020-12-23
EP3754062B1 true EP3754062B1 (en) 2022-01-26

Family

ID=71103232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20180129.7A Active EP3754062B1 (en) 2019-06-19 2020-06-16 Fibre bundle opening device for an open-end spinning device

Country Status (5)

Country Link
US (1) US11384455B2 (en)
EP (1) EP3754062B1 (en)
CN (1) CN112111814B (en)
BR (1) BR102020012202A2 (en)
DE (1) DE102019116584A1 (en)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564104A5 (en) * 1972-09-18 1975-07-15 Vyzk Ustav Bavlnarsky
CS165855B1 (en) * 1973-01-16 1975-12-22
CH578628A5 (en) * 1973-01-16 1976-08-13 Vyzk Ustav Bavlnarsky
US4024699A (en) * 1974-10-11 1977-05-24 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Sliver resolving apparatus for open-end spinning machines
EP0108229B1 (en) * 1982-11-05 1987-11-11 Maschinenfabrik Rieter Ag Cleaning machine for fibre material
DE3501842C2 (en) * 1985-01-22 1997-08-21 Schlafhorst & Co W Sliver dissolving unit for an OE spinning machine
DE4101315C2 (en) * 1991-01-18 1999-04-29 Stahlecker Fritz Feeding and opening device for an OE spinning device
DE4227885C2 (en) * 1992-08-22 1994-11-17 Rieter Ingolstadt Spinnerei Device for pneumatically feeding fibers to the fiber collection surface of an open-end spinning element
DE4441254A1 (en) * 1994-11-19 1996-05-23 Truetzschler Gmbh & Co Kg Device for opening and cleaning flake fiber material, for. B. cotton, synthetic fiber u. the like
DE10132912A1 (en) * 2001-06-28 2003-01-16 Stahlecker Gmbh Wilhelm Air spinning unit has opening roller inside a perforated drum that acts as collecting surface for the fiber web from which the yarn is formed
DE10351365A1 (en) * 2003-10-16 2005-06-02 Saurer Gmbh & Co. Kg Feeding trough for a sliver opening device of an open-end spinning device
DE102011116786A1 (en) * 2011-10-22 2013-04-25 Oerlikon Textile Gmbh & Co. Kg Feeding trough for a sliver opening device of an open-end spinning device
DE102014003329A1 (en) * 2014-03-08 2015-09-10 Saurer Germany Gmbh & Co. Kg Method and device for operating an open-end rotor spinning machine
DE102017118392A1 (en) * 2017-08-11 2019-02-14 Saurer Spinning Solutions Gmbh & Co. Kg Feed table device for a sliver disassembling device of an open-end spinning device

Also Published As

Publication number Publication date
CN112111814A (en) 2020-12-22
EP3754062A1 (en) 2020-12-23
DE102019116584A1 (en) 2020-12-24
US11384455B2 (en) 2022-07-12
BR102020012202A2 (en) 2020-12-29
CN112111814B (en) 2022-08-30
US20200399791A1 (en) 2020-12-24

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