WO2004015178A1 - Suction device for fibre-bundling devices on a spinning machine - Google Patents

Suction device for fibre-bundling devices on a spinning machine Download PDF

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Publication number
WO2004015178A1
WO2004015178A1 PCT/EP2003/005037 EP0305037W WO2004015178A1 WO 2004015178 A1 WO2004015178 A1 WO 2004015178A1 EP 0305037 W EP0305037 W EP 0305037W WO 2004015178 A1 WO2004015178 A1 WO 2004015178A1
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WO
WIPO (PCT)
Prior art keywords
suction
sliding surface
attachment
spinning
suction device
Prior art date
Application number
PCT/EP2003/005037
Other languages
German (de)
French (fr)
Inventor
Peter Blankenhorn
Original Assignee
Maschinenfabrik Rieter Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter Ag filed Critical Maschinenfabrik Rieter Ag
Priority to AU2003224157A priority Critical patent/AU2003224157A1/en
Publication of WO2004015178A1 publication Critical patent/WO2004015178A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements

Definitions

  • the invention relates to a suction device for fiber bundling devices of a spinning machine, with a suction channel which extends over several spinning stations and has a suction opening at each spinning station, with an attachment provided at each spinning station for covering the associated suction opening, with a sliding surface provided on each attachment for guiding an air-permeable conveyor belt for a fiber bundle to be bundled, with a suction slot arranged in each sliding surface and enclosed in a window-like manner, as well as with contact surfaces of the associated attachment which can be inserted into the respective suction opening and can thereby be placed on the boundary surfaces of the suction opening.
  • a stretched fiber structure is given a spin twist in direct connection to an output roller pair of a drafting system of a spinning machine, then a so-called spinning triangle arises at the output nip line of the output roller pair.
  • the spinning triangle contains edge fibers that are not properly incorporated in the twisted fibers and thus contribute little or nothing to the strength of the spun thread.
  • a move has recently been made to place a so-called compression zone in the draft zone of a drafting system, which is a component of a fiber bundling device and is in turn delimited on the outlet side by a clamping point. Only then will that Thread given the spinning twist.
  • the fibers are bundled or compacted in the compression zone, which means that the fiber structure is so narrow when leaving the last nip that the feared spinning triangle has almost disappeared.
  • the spun thread then becomes more even, firmer and less hairy.
  • the fiber bundling devices that contain the compression zones usually have a suction device with a suction channel that extends over several spinning stations, with the aid of which a suction air stream is generated in each of the compression zones, which causes or supports the compression of the fiber structure.
  • suction channels can have an exchangeable attachment for each spinning station to cover a suction opening of the suction channel relating to the spinning station, the individual attachments each passing an air-permeable conveyor belt over a suction slot.
  • a suction device of the type mentioned is state of the art by DE 100 56 668 A1. Because of the presence of the above-mentioned sliding surface guiding the conveyor belt, the attachment is subject to a certain wear. For this reason, the known attachment is interchangeable, while the suction channel, which extends over several spinning positions, can be retained. Exchanging such an attachment is, however, not only advantageous in the case of wear, which is not mentioned in the known publication, but also when differently shaped suction slits are to be used when spinning different fiber materials. It therefore makes sense to be able to replace an attachment as quickly and easily as possible.
  • the invention has for its object to provide a suction device of the type mentioned, in which the individual attachments can be quickly and securely attached to the suction channel.
  • the object is achieved in that each attachment is provided with holding arms which embrace the suction channel in the manner of pliers.
  • each attachment is inevitably aligned in the transport direction of the associated fiber structure. It is therefore not necessary to additionally align the attachments to the associated suction openings. This has the advantageous side effect that a round cross section can be selected for the individual suction openings, which is particularly easy to produce.
  • the holding arms rest resiliently on the suction channel. This creates an easily detachable connection, so that the individual attachments are easily interchangeable. This is especially true when the holding arms are attached to the suction channel with a clip connection.
  • the attachments are assigned shell-shaped holding elements which relate to spinning positions and which comprise the suction channel on the side facing away from the associated suction opening and which form the clip connection with the holding arms.
  • the attachments and the holding elements can be joined together smoothly, so that it is possible that the outer contour of at least one holding arm forms part of the sliding surface and merges into the outer contour of the shell-shaped holding element practically without a step.
  • the contact surfaces inserted into the respective suction opening and thereby abutting the boundary surfaces of the suction opening can already provide a sufficient seal
  • it is advantageous in a further embodiment of the invention if the circumferential annular groove for an annular seal is assigned to the holding arms in the region of the contact surfaces.
  • Such an annular groove is expediently located between the holding arms and the contact surfaces and seals the respective suction opening against false air in such a way that the suction air can only enter the suction device through the respective suction slot.
  • FIG. 1 shows a partially sectioned side view through a fiber bundling device of a spinning machine, with a cross-sectional representation of the suction channel and an attachment
  • FIG. 2 shows a greatly enlarged illustration of a partial section through the suction channel in the area of a clip connection and a ring seal
  • 3 shows a view in the direction of arrow III of FIG. 1 onto the suction channel and three attachments located at adjacent spinning positions, the rollers shown in FIG. 1 being omitted.
  • the fiber bundling device 1 shown in FIGS. 1 to 3 is part of a spinning machine, preferably a ring spinning machine, and is present once per spinning station 2. For each spinning station 2, the spinning machine has a drafting system 3, only partially shown in FIG.
  • the output roller pair 4 contains a lower roller 6, which is designed as a driven lower cylinder running through in the machine longitudinal direction and to which a printing roller 7 is assigned for each spinning station 2.
  • the lower roller 6 and the pressure roller 7 together form an exit nip line 8 which ends the draft zone of the drafting system 3.
  • a sliver or roving 9 is fed to the drafting device 3 in the direction of transport A and drawn in the drawing device 3 in a known manner to the desired fineness.
  • the exit roller pair 4 of the drafting unit 3 is followed by a compression zone 10, in which the drawn fiber assembly 11, which is still free of spinning twist, is to be bundled or compressed.
  • the fiber bundling device 1 provided for this contains an air-permeable conveyor belt 12, which transports the fiber assembly 11 through the compression zone 10.
  • the conveyor belt 12 is advantageously designed as a thin, fine-mesh fabric belt made of plastic threads.
  • the outlet-side end of the compression zone 10 is defined by a clamping point 13, which also serves as a swirl lock, so that the fiber structure 11 remains free of rotation in the compression zone 10.
  • the thread 14 is then formed, which in the delivery Direction B a swirl member, not shown, for example an annular spindle, is supplied and receives its spinning rotation.
  • the fiber bundling device 1 also contains a suction device 15 with a suction channel 16, which extends over a plurality of, for example, eight spinning stations 2 and is connected via a vacuum connection 17 to a vacuum source, not shown, so that the suction channel 16 is under vacuum overall during operation. For each spinning station 2 there is one suction opening 18 directed against the compression zone 10 in the suction channel 16.
  • Each individual suction opening 18 is covered with an exchangeable attachment 19, the outside of which is partially designed as a sliding surface 20 which guides the conveyor belt 12 sliding over it.
  • a suction slot 21 Arranged in the sliding surface 20 of each attachment 19 is a suction slot 21 which extends essentially in the direction of transport A and is enclosed on all sides by a window, which is covered by the air-permeable conveyor belt 12 and which extends approximately to the clamping point 13.
  • the suction slots 21 are arranged slightly obliquely with respect to the direction of movement of the conveyor belt 12.
  • a clamping roller 22 which drives the conveyor belt 12 and presses the fiber assembly 11 against the conveyor belt 12 and at the same time the conveyor belt 12 with a certain pressure against the sliding surface 20 of the attachment 19.
  • the pinch roller 22 in turn receives its drive from the pressure roller 7 of the drafting device 3 via a toothed belt 23 or another gear.
  • the respective conveyor belt 12 leaves the sliding surface 20 and is guided there by a tensioning device 24.
  • the suction channel 16 is at a greater distance from the lower roller 6.
  • this larger distance is only present between the individual spinning stations 2 and serves to keep the fiber bundling device 1 clean.
  • the distance is bridged by the design of the attachment 19, which never reaches 8 as far as the area of the output clamps.
  • the attachment 19 can be extended in the region of the exit clamping line 8 by lateral guide surfaces 25 and 26, over which the fiber structure 11 does not run, but which guide the conveyor belt 12 laterally. This makes it unnecessary to attach expensive side guide devices to the tensioning device 24.
  • the suction channel 16 is flattened on its upper side, so that a circular suction opening 18 is possible at the individual spinning positions 2.
  • the suction channel 16 can be a tube with a circular cross section in a manner not shown.
  • Each attachment 19 has contact surfaces 28, which are also advantageously cylindrical in shape and which form a seal against the boundary surfaces 27 of the associated suction opening 18.
  • the contact surfaces 28 can be designed to be slightly resilient to the outside.
  • each attachment 19 is provided with holding arms 29 and 30 which comprise the suction channel 16 in the manner of pliers. Because the suction channel 16 extends in the longitudinal direction of the machine, this inevitably enables the individual attachments 19 to be aligned in the direction of movement of the associated conveyor belt 12. Alignment therefore does not have to take place at the individual suction openings 18, so that the latter can be designed with a round cross section.
  • the holding arms 29 and 30 of the attachments 19 made of a suitable plastic are resiliently placed on the suction channel 16 and are expediently fastened to the suction channel 16 with clip connections 31, 32. This can be seen more clearly from the enlarged FIG. 2.
  • the clip connections 31 and 32 can advantageously be produced in that the attachments 19 are assigned shell-shaped holding elements 33 which relate to the spinning station and which comprise the round suction channel 16 on the side facing away from the associated suction opening 18 and which then hold the clip connections 31 and 32 with the holding arms 29 and 30 form. Therefore, no functional elements for holding the attachments 19 need be present on the suction channel 16 itself.
  • the outer contour 34 of the upper holding arm 29 forms part of the sliding surface 20, which merges into the outer contour 35 of the shell-shaped holding element 33 practically without a step.
  • the individual holding arms 29 and 30 are connected to the sliding surface 20 via a shaft-like intermediate piece 38 of the attachment 19, this intermediate piece 38 being arranged inclined with respect to the sliding surface 20.

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

Abstract

The invention relates to a suction device for fibre-bundling devices on a spinning machine, comprising a suction channel (16), extending over several spinning posts, which has a suction opening (18) at each spinning post. Each suction opening (18) is covered by an attachment (19). The attachments (19) each have a sliding surface (20) for guiding an air-permeable transport belt (12) for a fibre composite which is to be bundled. A window-like enclosed suction slot (21) is arranged in each sliding surface (20). Each attachment (19) has joint surfaces (28), which can be inserted in the relevant suction opening and thus may be brought in contact with boundary surfaces (27) of the suction opening. The attachments (19) are provided with retaining arms (29, 30) which grip the suction channel (16) in the form of a tongue.

Description

Beschreibung description
Sauqeinrichtung für Faserbündelunqseinrichtunqen einer Spinn- maschineSauqeinrichtung for fiber bundle devices of a spinning machine
Die Erfindung betrifft eine Saugeinrichtung für Faserbündelungseinrichtungen einer Spinnmaschine, mit einem sich über mehrere Spinnstellen erstreckenden, an jeder Spinnstelle eine Saugöffnung aufweisenden Saugkanal, mit an jeder Spinnstelle vorgesehenem Aufsatz zum Abdecken der zugehörigen Saugöffnung, mit einer an jedem Aufsatz vorgesehenen Gleitfläche zum Führen eines luftdurchlässigen Transportbandes für einen zu bündelnden Faserverband, mit einem in jeder Gleitflä- ehe angeordneten, fensterartig umschlossenen Saugschlitz, sowie mit in die jeweilige Saugöffnung einfügbare und dabei an die Begrenzungsflächen der Saugöffnung anlegbare Anlageflächen des zugeordneten Aufsatzes.The invention relates to a suction device for fiber bundling devices of a spinning machine, with a suction channel which extends over several spinning stations and has a suction opening at each spinning station, with an attachment provided at each spinning station for covering the associated suction opening, with a sliding surface provided on each attachment for guiding an air-permeable conveyor belt for a fiber bundle to be bundled, with a suction slot arranged in each sliding surface and enclosed in a window-like manner, as well as with contact surfaces of the associated attachment which can be inserted into the respective suction opening and can thereby be placed on the boundary surfaces of the suction opening.
Wenn einem verstreckten Faserverband in unmittelbarem Anschluss an ein Ausgangswalzenpaar eines Streckwerks einer Spinnmaschine ein Spinndrall erteilt wird, dann entsteht an der Ausgangsklemmlinie des Ausgangswalzenpaares ein so genanntes Spinndreieck. Dies rührt daher, dass der verstreckte Faserverband mit einer bestimmten Breite das Streckwerk verlässt und zu einem Faden relativ kleinen Durchmessers zusammengedreht wird. Das Spinndreieck enthält Randfasern, die nicht ordnungsgemäß in den verdrehten Fasern eingebunden werden und somit wenig oder nichts zur Festigkeit des ersponnenen Fadens beitragen. Man ist daher in jüngerer Zeit dazu übergegangen, der Verzugszo- ne eines Streckwerks eine so genannte Verdichtungszone nachzuordnen, die Bestandteil einer Faserbündelungseinrichtung ist und ihrerseits auslaufseitig von einer Klemmstelle begrenzt wird. Erst danach wird dem Faden die Spinndrehung erteilt. In der Verdichtungszone werden die Fasern gebündelt oder verdichtet, wodurch der Faserverband beim Verlas sen der letzten Klemmstelle so schmal ist, dass das befürchtete Spinndreieck nahezu verschwunden ist. Der ersponnene Faden wird dann gleichmäßiger, fester und weniger haarig.If a stretched fiber structure is given a spin twist in direct connection to an output roller pair of a drafting system of a spinning machine, then a so-called spinning triangle arises at the output nip line of the output roller pair. This is due to the fact that the stretched fiber structure leaves the drafting system with a certain width and is twisted into a thread of relatively small diameter. The spinning triangle contains edge fibers that are not properly incorporated in the twisted fibers and thus contribute little or nothing to the strength of the spun thread. A move has recently been made to place a so-called compression zone in the draft zone of a drafting system, which is a component of a fiber bundling device and is in turn delimited on the outlet side by a clamping point. Only then will that Thread given the spinning twist. The fibers are bundled or compacted in the compression zone, which means that the fiber structure is so narrow when leaving the last nip that the feared spinning triangle has almost disappeared. The spun thread then becomes more even, firmer and less hairy.
Die Faserbündelungseinrichtungen, welche die Verdichtungszonen enthalten, besitzen üblicherweise eine Saugeinrichtung mit einem sich über mehrere Spinnstellen erstreckenden Saugkanal, mit dessen Hilfe in den Verdichtungszonen jeweils ein Saugluftstrom erzeugt wird, der das Verdichten des Faserverbandes bewirkt oder unterstützt. Derartige Saugkanäle können pro Spinnstelle einen austauschbaren Aufsatz zum Abdecken einer spinnstellenbezogenen Saugöffnung des Saugkanals besitzen, wobei die einzelnen Aufsätze jeweils ein luftdurchlässiges Trans- portband über einen Saugschlitz führen.The fiber bundling devices that contain the compression zones usually have a suction device with a suction channel that extends over several spinning stations, with the aid of which a suction air stream is generated in each of the compression zones, which causes or supports the compression of the fiber structure. Such suction channels can have an exchangeable attachment for each spinning station to cover a suction opening of the suction channel relating to the spinning station, the individual attachments each passing an air-permeable conveyor belt over a suction slot.
Eine Saugeinrichtung der eingangs genannten Art ist durch die DE 100 56 668 A1 Stand der Technik. Wegen des Vorhandenseins der genannten, das Transportband führenden Gleitfläche unterliegt der Aufsatz ei- nem gewissen Verschleiß. Aus diesem Grunde ist der bekannte Aufsatz austauschbar, während der sich über mehrere Spinnstellen erstreckende Saugkanal beibehalten werden kann. Das Austauschen eines solchen Aufsatzes ist jedoch, was nicht in der bekannten Druckschrift erwähnt ist, nicht nur bei Verschleiß vorteilhaft, sondern auch dann, wenn beim Verspinnen unterschiedlicher Fasermaterialien unterschiedlich geformte Saugschlitze verwendet werden sollen. Es ist deshalb sinnvoll, das Austauschen eines Aufsatzes möglichst schnell und einfach durchführen zu können.A suction device of the type mentioned is state of the art by DE 100 56 668 A1. Because of the presence of the above-mentioned sliding surface guiding the conveyor belt, the attachment is subject to a certain wear. For this reason, the known attachment is interchangeable, while the suction channel, which extends over several spinning positions, can be retained. Exchanging such an attachment is, however, not only advantageous in the case of wear, which is not mentioned in the known publication, but also when differently shaped suction slits are to be used when spinning different fiber materials. It therefore makes sense to be able to replace an attachment as quickly and easily as possible.
Der Erfindung liegt die Aufgabe zu Grunde, eine Saugeinrichtung der eingangs genannten Art zu schaffen, bei der die einzelnen Aufsätze schnell und sicher am Saugkanal befestigt werden können. Die Aufgabe wird dadurch gelöst, dass jeder Aufsatz mit den Saugkanal zangenartig umfassenden Haltearmen versehen ist.The invention has for its object to provide a suction device of the type mentioned, in which the individual attachments can be quickly and securely attached to the suction channel. The object is achieved in that each attachment is provided with holding arms which embrace the suction channel in the manner of pliers.
Da sich der Saugkanal in Maschinenlängsrichtung über mehrere Spinnstellen erstreckt, wird bei einer derartigen Halterung zwangsläufig jeder Aufsatz in Transportrichtung des zugehörigen Faserverbandes ausgerichtet. Es braucht somit kein zusätzliches Ausrichten der Aufsätze zu den zugehörigen Saugöffnungen stattzufinden. Dies hat den vorteilhaf- ten Nebeneffekt, dass für die einzelnen Saugöffnungen jeweils ein runder Querschnitt gewählt werden kann, der besonders einfach herstellbar ist.Since the suction channel extends over several spinning positions in the longitudinal direction of the machine, with such a holder, each attachment is inevitably aligned in the transport direction of the associated fiber structure. It is therefore not necessary to additionally align the attachments to the associated suction openings. This has the advantageous side effect that a round cross section can be selected for the individual suction openings, which is particularly easy to produce.
Zweckmäßig ist vorgesehen, dass sich die Haltearme federelastisch an den Saugkanal anlegen. Es entsteht dadurch eine leicht lösbare Verbindung, so dass die einzelnen Aufsätze leicht austauschbar sind. Dies gilt insbesondere dann, wenn die Haltearme mit jeweils einer Klipsverbindung am Saugkanal befestigt werden.It is expediently provided that the holding arms rest resiliently on the suction channel. This creates an easily detachable connection, so that the individual attachments are easily interchangeable. This is especially true when the holding arms are attached to the suction channel with a clip connection.
Zum Herstellen einer solchen Klipsverbindung ist in weiterer Ausgestaltung der Erfindung vorgesehen, dass den Aufsätzen spinnstellenbezo- gene schalenförmige Halteelemente zugeordnet sind, welche den Saugkanal auf der der zugehörigen Saugöffnung abgewandten Seite umfassen und die mit den Haltearmen die Klipsverbindung bilden.To produce such a clip connection, it is provided in a further embodiment of the invention that the attachments are assigned shell-shaped holding elements which relate to spinning positions and which comprise the suction channel on the side facing away from the associated suction opening and which form the clip connection with the holding arms.
Mittels einer solchen Klipsverbindung lassen sich die Aufsätze und die Halteelemente stoßfrei aneinanderfügen, so dass es möglich wird, dass die Außenkontur wenigstens eines Haltearmes einen Teil der Gleitfläche bildet und praktisch absatzlos in die Außenkontur des schalenförmigen Halteelementes übergeht. Obwohl die in die jeweilige Saugöffnung eingefügten und dabei an den Begrenzungsflächen der Saugöffnung anliegenden Anlageflächen bereits eine ausreichende Abdichtung ergeben können, ist es in weiterer Ausgestaltung der Erfindung vorteilhaft, wenn den Haltearmen im Be- reich der Anlageflächen eine umlaufende Ringnut für eine Ringdichtung zugeordnet ist. Eine solche Ringnut befindet sich zweckmäßig zwischen den Haltearmen und den Anlageflächen und dichtet die jeweilige Saugöffnung derart gegen Falschluft ab, dass die Saugluft ausschließlich durch den jeweiligen Saugschlitz in die Saugeinrichtung eintreten kann.By means of such a clip connection, the attachments and the holding elements can be joined together smoothly, so that it is possible that the outer contour of at least one holding arm forms part of the sliding surface and merges into the outer contour of the shell-shaped holding element practically without a step. Although the contact surfaces inserted into the respective suction opening and thereby abutting the boundary surfaces of the suction opening can already provide a sufficient seal, it is advantageous in a further embodiment of the invention if the circumferential annular groove for an annular seal is assigned to the holding arms in the region of the contact surfaces. Such an annular groove is expediently located between the holding arms and the contact surfaces and seals the respective suction opening against false air in such a way that the suction air can only enter the suction device through the respective suction slot.
Vorteilhaft ist es, die Haltearme mit der Gleitfläche über ein schachtartiges Zwischenstück des Aufsatzes zu verbinden, welches gegenüber der Gleitfläche geneigt angeordnet ist. Dadurch wird es möglich, den Saugkanal in einem größeren Abstand vom Ausgangswalzenpaar des Streckwerks anzuordnen und dennoch die Gleitfläche jeder einzelnen Spinnstelle bis zum Ausgangswalzenpaar hinzuführen. Der größere Abstand des Saugrohres vom Streckwerk besteht dann also nur jeweils zwischen zwei Spinnstellen und hat den vorteilhaften Effekt, dass in diesem Bereich, eben wegen des großen Abstandes, keine Verflugung stattfinden kann.It is advantageous to connect the holding arms to the sliding surface via a shaft-like intermediate piece of the attachment, which is arranged inclined to the sliding surface. This makes it possible to arrange the suction channel at a greater distance from the pair of output rollers of the drafting system and still lead the sliding surface of each individual spinning station to the pair of output rollers. The greater distance between the suction pipe and the drafting system then only exists between two spinning positions and has the advantageous effect that no flight can take place in this area, precisely because of the large distance.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles.Further advantages and features of the invention result from the following description of an exemplary embodiment.
Es zeigen:Show it:
Figur 1 eine teilweise geschnittene Seitenansicht durch eine Faserbündelungseinrichtung einer Spinnmaschine, mit einer Querschnittdarstellung des Saugkanals sowie eines Aufsatzes,FIG. 1 shows a partially sectioned side view through a fiber bundling device of a spinning machine, with a cross-sectional representation of the suction channel and an attachment,
Figur 2 in stark vergrößerter Darstellung einen Teilschnitt durch den Saugkanal im Bereich einer Klipsverbindung und einer Ringdichtung, Figur 3 eine Ansicht in Richtung des Pfeiles III der Figur 1 auf den Saugkanal sowie drei an benachbarten Spinnstellen befindliche Aufsätze, wobei die in Figur 1 dargestellten Walzen weggelassen wurden.FIG. 2 shows a greatly enlarged illustration of a partial section through the suction channel in the area of a clip connection and a ring seal, 3 shows a view in the direction of arrow III of FIG. 1 onto the suction channel and three attachments located at adjacent spinning positions, the rollers shown in FIG. 1 being omitted.
Die in den Figuren 1 bis 3 dargestellte Faserbündelungseinrichtung 1 ist Bestandteil einer Spinnmaschine, vorzugsweise einer Ringspinnmaschine, und einmal pro Spinnstelle 2 vorhanden. Die Spinnmaschine besitzt pro Spinnstelle 2 ein nur teilweise in Figur 1 dargestelltes Streckwerk 3, von dem lediglich ein Ausgangswalzenpaar 4 sowie ein vorangehendes Riemchenpaar 5 gezeigt sind.The fiber bundling device 1 shown in FIGS. 1 to 3 is part of a spinning machine, preferably a ring spinning machine, and is present once per spinning station 2. For each spinning station 2, the spinning machine has a drafting system 3, only partially shown in FIG.
Das Ausgangswalzenpaar 4 enthält eine als in Maschinenlängsrichtung durchlaufender, angetriebener Unterzylinder ausgebildete Unterwalze 6, der pro Spinnstelle 2 eine Druckwalze 7 zugeordnet ist. Die Unterwalze 6 und die Druckwalze 7 bilden miteinander eine Ausgangsklemmlinie 8, welche die Verzugszone des Streckwerks 3 beendet. Dem Streckwerk 3 wird in Transportrichtung A ein Faserband oder ein Vorgarn 9 zugeführt und im Streckwerk 3 in bekannter Weise bis zur gewünschten Feinheit verzogen. Dem Ausgangswalzenpaar 4 des Streckwerks 3 folgt eine Verdichtungszone 10, in welcher der verstreckte, jedoch noch spinndrehungsfreie Faserverband 11 gebündelt oder verdichtet werden soll. Die hierfür vorhandene Faserbündelungseinrichtung 1 enthält ein luftdurchlässiges Transportband 12, das den Faserverband 11 durch die Verdich- tungszone 10 transportiert. Das Transportband 12 ist vorteilhaft als dünnes, feinmaschiges Gewebeband aus Kunststofffäden ausgebildet.The output roller pair 4 contains a lower roller 6, which is designed as a driven lower cylinder running through in the machine longitudinal direction and to which a printing roller 7 is assigned for each spinning station 2. The lower roller 6 and the pressure roller 7 together form an exit nip line 8 which ends the draft zone of the drafting system 3. A sliver or roving 9 is fed to the drafting device 3 in the direction of transport A and drawn in the drawing device 3 in a known manner to the desired fineness. The exit roller pair 4 of the drafting unit 3 is followed by a compression zone 10, in which the drawn fiber assembly 11, which is still free of spinning twist, is to be bundled or compressed. The fiber bundling device 1 provided for this contains an air-permeable conveyor belt 12, which transports the fiber assembly 11 through the compression zone 10. The conveyor belt 12 is advantageously designed as a thin, fine-mesh fabric belt made of plastic threads.
Das auslaufseitige Ende der Verdichtungszone 10 ist durch eine Klemmstelle 13 definiert, die zugleich als Drallsperre dient, so dass der Faserverband 11 in der Verdichtungszone 10 drehungsfrei bleibt. Im Anschluss an die Klemmstelle 13 entsteht dann der Faden 14, der in Liefer- richtung B einem nicht dargestellten Drallorgan, beispielsweise einer Ringspindel, zugeführt wird und dabei seine Spinndrehung erhält.The outlet-side end of the compression zone 10 is defined by a clamping point 13, which also serves as a swirl lock, so that the fiber structure 11 remains free of rotation in the compression zone 10. Following the clamping point 13, the thread 14 is then formed, which in the delivery Direction B a swirl member, not shown, for example an annular spindle, is supplied and receives its spinning rotation.
Die Faserbündelungseinrichtung 1 enthält ferner eine Saugeinrichtung 15 mit einem Saugkanal 16, der sich über eine Mehrzahl von beispielsweise acht Spinnstellen 2 erstreckt und über einen Unterdruckanschluss 17 an eine nicht dargestellte Unterdruckquelle angeschlossen ist, so dass der Saugkanal 16 bei Betrieb insgesamt unter Unterdruck steht. Pro Spinnstelle 2 ist im Saugkanal 16 jeweils eine gegen die Verdich- tungszone 10 gerichtete Saugöffnung 18 vorhanden.The fiber bundling device 1 also contains a suction device 15 with a suction channel 16, which extends over a plurality of, for example, eight spinning stations 2 and is connected via a vacuum connection 17 to a vacuum source, not shown, so that the suction channel 16 is under vacuum overall during operation. For each spinning station 2 there is one suction opening 18 directed against the compression zone 10 in the suction channel 16.
Jede einzelne Saugöffnung 18 ist mit einem austauschbaren Aufsatz 19 abgedeckt, dessen Außenseite teilweise als Gleitfläche 20 ausgebildet ist, die das darüber gleitende Transportband 12 führt. In der Gleitfläche 20 jedes Aufsatzes 19 ist ein sich im Wesentlichen in Transportrichtung A erstreckender, allseitig fensterartig umschlossener Saugschlitz 21 angeordnet, der vom luftdurchlässigen Transportband 12 überdeckt ist und der sich etwa bis zur Klemmstelle 13 erstreckt. Wie aus Figur 3 ersichtlich, sind die Saugschlitze 21 gegenüber der Bewegungsrichtung des Transportbandes 12 leicht schräg angeordnet.Each individual suction opening 18 is covered with an exchangeable attachment 19, the outside of which is partially designed as a sliding surface 20 which guides the conveyor belt 12 sliding over it. Arranged in the sliding surface 20 of each attachment 19 is a suction slot 21 which extends essentially in the direction of transport A and is enclosed on all sides by a window, which is covered by the air-permeable conveyor belt 12 and which extends approximately to the clamping point 13. As can be seen from FIG. 3, the suction slots 21 are arranged slightly obliquely with respect to the direction of movement of the conveyor belt 12.
Zum Bewirken des erforderlichen Drallstopps an der Klemmstellen 13 ist eine Klemmwalze 22 vorgesehen, die das Transportband 12 antreibt und den Faserverband 11 an das Transportband 12 sowie zugleich das Transportband 12 mit einem gewissen Andruck gegen die Gleitfläche 20 des Aufsatzes 19 drückt. Die Klemmwalze 22 ihrerseits erhält ihren Antrieb über einen Zahnriemen 23 oder ein anderes Getriebemittel von der Druckwalze 7 des Streckwerks 3.To effect the required swirl stop at the clamping points 13, a clamping roller 22 is provided which drives the conveyor belt 12 and presses the fiber assembly 11 against the conveyor belt 12 and at the same time the conveyor belt 12 with a certain pressure against the sliding surface 20 of the attachment 19. The pinch roller 22 in turn receives its drive from the pressure roller 7 of the drafting device 3 via a toothed belt 23 or another gear.
Auf der dem Saugschlitz 21 abgewandten Seite verlässt das jeweilige Transportband 12 die Gleitfläche 20 und ist dort durch eine Spanneinrichtung 24 geführt. Wie aus Figur 1 ersichtlich, weist der Saugkanal 16 gegenüber der Unterwalze 6 einen größeren Abstand auf. Dieser größere Abstand ist jedoch lediglich zwischen den einzelnen Spinnstellen 2 vorhanden und dient dem Sauberhalten der Faserbündelungseiπrichtung 1. An den einzelnen Spinnstellen 2 selbst ist der Abstand durch die Gestaltung des Aufsatzes 19 überbrückt, der bis an den Bereich der Ausgangsklemmli nie 8 heranreicht. Der Aufsatz 19 kann im Bereich der Ausgangsklemmlinie 8 durch seitliche Führungsflächen 25 und 26 verlängert sein, über welche der Faserverband 11 nicht läuft, die aber das Transportband 12 seitlich führen. Dadurch wird es überflüssig, an der Spanneinrichtung 24 kostspielige Seitenführungseinrichtungen anzubringen.On the side facing away from the suction slot 21, the respective conveyor belt 12 leaves the sliding surface 20 and is guided there by a tensioning device 24. As can be seen from FIG. 1, the suction channel 16 is at a greater distance from the lower roller 6. However, this larger distance is only present between the individual spinning stations 2 and serves to keep the fiber bundling device 1 clean. At the individual spinning stations 2 themselves, the distance is bridged by the design of the attachment 19, which never reaches 8 as far as the area of the output clamps. The attachment 19 can be extended in the region of the exit clamping line 8 by lateral guide surfaces 25 and 26, over which the fiber structure 11 does not run, but which guide the conveyor belt 12 laterally. This makes it unnecessary to attach expensive side guide devices to the tensioning device 24.
Der Saugkanal 16 ist, wie in Figur 1 gezeichnet, an seiner Oberseite ab- geflacht, so dass eine kreisrunde Saugöffnung 18 an den einzelnen Spinnstellen 2 möglich ist. Der Saugkanal 16 kann jedoch in nicht dargestellter Weise ein im Querschnitt kreisförmiges Rohr sein.As drawn in FIG. 1, the suction channel 16 is flattened on its upper side, so that a circular suction opening 18 is possible at the individual spinning positions 2. However, the suction channel 16 can be a tube with a circular cross section in a manner not shown.
Jeder Aufsatz 19 besitzt Anlageflächen 28, die vorteilhaft ebenfalls zy- linderförmig ausgebildet sind und sich an die Begrenzungsflächen 27 der zugehörigen Saugöffnung 18 möglichst dichtend anlegen. Hierzu können die Anlageflächen 28 leicht nach außen federnd ausgebildet sein.Each attachment 19 has contact surfaces 28, which are also advantageously cylindrical in shape and which form a seal against the boundary surfaces 27 of the associated suction opening 18. For this purpose, the contact surfaces 28 can be designed to be slightly resilient to the outside.
Gemäß der vorliegenden Erfindung ist jeder Aufsatz 19 mit den Saugkanal 16 zangenartig umfassenden Haltearmen 29 und 30 versehen. Dadurch, dass sich der Saugkanal 16 in Maschinenlängsrichtung erstreckt, wird dadurch zwangsläufig ein Ausrichten der einzelnen Aufsätze 19 in Bewegungsrichtung des zugehörigen Transportbandes 12 mög- lieh. Ein Ausrichten braucht daher nicht an den einzelnen Saugöffnungen 18 zu erfolgen, so dass letztere mit einem runden Querschnitt gestaltet werden können. Die Haltearme 29 und 30 der aus einem geeigneten Kunststoff hergestellten Aufsätze 19 legen sich federelastisch an den Saugkanal 16 an und sind zweckmäßig mit Klipsverbindungen 31 , 32 am Saugkanal 16 befestigt. Dies ist aus der vergrößerten Figur 2 deutlicher zu erkennen. Die Klipsverbindungen 31 und 32 können vorteilhaft dadurch erzeugt werden, dass den Aufsätzen 19 spinnstellenbezogene schalenförmige Halteelemente 33 zugeordnet sind, die den runden Saugkanal 16 auf der der zugehörigen Saugöffnung 18 abgewandten Seite umfassen und die dann mit den Haltearmen 29 und 30 die Klipsverbindungen 31 und 32 bilden. Daher brauchen am Saugkanal 16 selbst keinerlei Funktionselemente für die Halterung der Aufsätze 19 vorhanden zu sein.According to the present invention, each attachment 19 is provided with holding arms 29 and 30 which comprise the suction channel 16 in the manner of pliers. Because the suction channel 16 extends in the longitudinal direction of the machine, this inevitably enables the individual attachments 19 to be aligned in the direction of movement of the associated conveyor belt 12. Alignment therefore does not have to take place at the individual suction openings 18, so that the latter can be designed with a round cross section. The holding arms 29 and 30 of the attachments 19 made of a suitable plastic are resiliently placed on the suction channel 16 and are expediently fastened to the suction channel 16 with clip connections 31, 32. This can be seen more clearly from the enlarged FIG. 2. The clip connections 31 and 32 can advantageously be produced in that the attachments 19 are assigned shell-shaped holding elements 33 which relate to the spinning station and which comprise the round suction channel 16 on the side facing away from the associated suction opening 18 and which then hold the clip connections 31 and 32 with the holding arms 29 and 30 form. Therefore, no functional elements for holding the attachments 19 need be present on the suction channel 16 itself.
Wie aus Figur 1 ersichtlich, bildet die Außenkontur 34 des oberen Halte- armes 29 einen Teil der Gleitfläche 20, die praktisch absatzlos in die Außenkontur 35 des schalenförmigen Haltelementes 33 übergeht.As can be seen from FIG. 1, the outer contour 34 of the upper holding arm 29 forms part of the sliding surface 20, which merges into the outer contour 35 of the shell-shaped holding element 33 practically without a step.
Im Bereich der Anlageflächen 28, und zwar zwischen den Haltearmen 29, 30 und den Anlageflächen 28 befindet sich eine umlaufende Ringnut 36 für eine Ringdichtung 37. Dies wird insbesondere aus der Figur 2 erkennbar. Dies führt zu einer guten Abdichtung der jeweiligen Saugöffnung 18 gegen Falschluft, so dass die die Verdichtung bewirkende oder unterstützende Saugluft ausschließlich durch die einzelnen Saugschlitze 21 in den Saugkanal 16 eintreten kann.In the area of the contact surfaces 28, namely between the holding arms 29, 30 and the contact surfaces 28, there is a circumferential annular groove 36 for an annular seal 37. This can be seen in particular from FIG. 2. This leads to a good sealing of the respective suction opening 18 against false air, so that the suction air causing or supporting the compression can only enter the suction channel 16 through the individual suction slots 21.
Die einzelnen Haltearme 29 und 30 sind mit der Gleitfläche 20 über ein schachtartiges Zwischenstück 38 des Aufsatzes 19 verbunden, wobei dieses Zwischenstück 38 gegenüber der Gleitfläche 20 geneigt angeordnet ist. Dadurch lässt sich der Abstand zwischen dem Saugkanal 16 und der Ausgangsklemmlinie 8 des Streckwerks 3 an den einzelnen Spinnstellen 2 überbrücken, während jeweils zwischen zwei Spinnstellen der Saugkanal 16 gegenüber dem Ausgangswalzenpaar 4 einen große- ren Abstand aufweist, der ein Verschmutzen der Faserbündelungseinrichtung 1 zwischen den Spinnstellen 2 wirksam verhindert. The individual holding arms 29 and 30 are connected to the sliding surface 20 via a shaft-like intermediate piece 38 of the attachment 19, this intermediate piece 38 being arranged inclined with respect to the sliding surface 20. As a result, the distance between the suction channel 16 and the outlet clamping line 8 of the drafting system 3 can be bridged at the individual spinning stations 2, while between two spinning stations the suction channel 16 is large compared to the outlet roller pair 4. Ren has a distance that effectively prevents contamination of the fiber bundling device 1 between the spinning stations 2.

Claims

Patentansprüche claims
1. Saugeinrichtung für Faserbündelungseinrichtungen einer Spinnmaschine, mit einem sich über mehrere Spinnstellen erstreckenden, an jeder Spinnstelle eine Saugöffnung aufweisenden Saugkanal, mit an jeder Spinnstelle vorgesehenem Aufsatz zum Abdecken der zugehörigen Saugöffnung, mit einer an jedem Aufsatz vorgesehen Gleitfläche zum Führen eines luftdurchlässigen Transportbandes für einen zu bündelnden Faserverband, mit einem in jeder Gleitfläche ange- ordneten, fensterartig umschlossenen Saugschlitz sowie mit in die jeweilige Saugöffnung einfügbare und dabei an die Begrenzungsflächen der Saugöffnung anlegbare Anlageflächen des zugeordneten Aufsatzes, dadurch gekennzeichnet, dass jeder Aufsatz (19) mit den Saugkanal (16) zangenartig umfassenden Haltearmen (29, 30) ver- sehen ist.1.Suction device for fiber bundling devices of a spinning machine, with a suction channel which extends over several spinning stations and has a suction opening at each spinning station, with an attachment provided at each spinning station for covering the associated suction opening, with a sliding surface provided on each attachment for guiding an air-permeable conveyor belt for one to form a bundle of fibers, with a suction slot arranged in each sliding surface and enclosed in a window-like manner, and with contact surfaces of the associated attachment that can be inserted into the respective suction opening and thereby placed on the boundary surfaces of the suction opening, characterized in that each attachment (19) with the suction channel (16 ) pliers-like holding arms (29, 30) is provided.
2. Saugeinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass sich die Haltearme (29, 30) federelastisch an den Saugkanal (16) anlegen.2. Suction device according to claim 1, characterized in that the holding arms (29, 30) resiliently apply to the suction channel (16).
3. Saugeinrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Haltearme (29, 30) mit jeweils einer Klipsverbindung (31 , 32) am Saugkanal (16) befestigt sind.3. Suction device according to claim 2, characterized in that the holding arms (29, 30) are each fastened to the suction channel (16) with a clip connection (31, 32).
4. Saugeinrichtung nach Anspruch 3, dadurch gekennzeichnet, dass den Aufsätzen (19) spinnstellenbezogene schalenförmige Halteelemente (33) zugeordnet sind, die den Saugkanal (16) auf der der zugehörigen Saugöffnung (18) abgewandten Seite umfassen und die mit den Haltearmen (29, 39) die Klipsverbindungen (31 ,32) bilden.4. Suction device according to claim 3, characterized in that the attachments (19) are associated with shell-shaped holding elements (33) relating to the spinning station, which comprise the suction channel (16) on the side facing away from the associated suction opening (18) and which are connected to the holding arms (29, 39) form the clip connections (31, 32).
Saugeinrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Außenkontur (34) wenigstens eines Haltearmes (29) einen Teil der Gleitfläche (20) bildet und praktisch absatzlos in die Außenkontur (35) des schalenförmigen Halteelementes (33) übergeht.Suction device according to claim 4, characterized in that the outer contour (34) of at least one holding arm (29) is part of the Forms sliding surface (20) and merges practically without paragraph into the outer contour (35) of the shell-shaped holding element (33).
6. Saugeinrichtung nach einem der Ansprüche 1 bis 5, dadurch ge- kennzeichnet, dass den Haltearmen (29, 30) im Bereich der Anlageflächen (28) eine umlaufende Ringnut (36) für eine Ringdichtung (37) zugeordnet ist.6. Suction device according to one of claims 1 to 5, character- ized in that the holding arms (29, 30) in the region of the contact surfaces (28) is assigned a circumferential annular groove (36) for an annular seal (37).
7. Saugeinrichtung nach Anspruch 6 dadurch gekennzeichnet, dass sich die Ringnut (36) zwischen den Haltearmen (29, 30) und den Anlageflächen (28) befindet.7. Suction device according to claim 6, characterized in that the annular groove (36) between the holding arms (29, 30) and the contact surfaces (28).
8. Saugeinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Haltearme (29, 30) mit der Gleitfläche (20) über ein schachtartiges Zwischenstück (38) verbunden sind, welches gegenüber der Gleitfläche (20) geneigt angeordnet ist. 8. Suction device according to one of claims 1 to 7, characterized in that the holding arms (29, 30) are connected to the sliding surface (20) via a shaft-like intermediate piece (38) which is arranged inclined relative to the sliding surface (20).
PCT/EP2003/005037 2002-07-30 2003-05-14 Suction device for fibre-bundling devices on a spinning machine WO2004015178A1 (en)

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DE10235876.1 2002-07-30
DE2002135876 DE10235876A1 (en) 2002-07-30 2002-07-30 Spinning assembly fibre inlet cover is retained in position by pincer-operated pincer arms with snap fit lock

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CN100355966C (en) * 2005-02-25 2007-12-19 宁波德昌精密纺织机械有限公司 Collecting tube for compact spining
DE102012110899A1 (en) 2012-11-13 2014-05-15 Wilhelm Stahlecker Gmbh Insert for pneumatic compression device for compression spinning on spinning machine, has lateral guide surfaces for lateral guidance of conveyor belt in region of clamping point, particularly in lateral extension of clamping line

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CH707249A1 (en) * 2012-11-30 2014-05-30 Rieter Ag Maschf Suction device for compacting device for fibrous material of stretching machine of spinning machine, has first housing unit, which has arc-shaped external wall provided with slot-shaped opening

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US6298523B1 (en) * 1999-11-18 2001-10-09 Fritz Stahlecker Apparatus for condensing a fiber strand and a method of making yarn using same
DE10036786A1 (en) * 2000-07-28 2002-02-07 Stahlecker Fritz Condensing stage for drawn sliver, for spinning, has a steel spring clip around the base body as reinforcement to reduce wear and seal the suction slit against false air
DE10056668A1 (en) * 2000-11-09 2002-05-16 Fritz Stahlecker Condensing stage for drawn sliver, at a sliver drawing unit, has a sliding surface for the transport belt formed by an insert into the suction slit of the suction channel, which can be replaced when worn
EP1215313A2 (en) * 2000-12-13 2002-06-19 Maschinenfabrik Rieter Ag Reinforcement for a suction channel in a fibre condensing device of a spinning machine

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Publication number Priority date Publication date Assignee Title
US6298523B1 (en) * 1999-11-18 2001-10-09 Fritz Stahlecker Apparatus for condensing a fiber strand and a method of making yarn using same
DE10036786A1 (en) * 2000-07-28 2002-02-07 Stahlecker Fritz Condensing stage for drawn sliver, for spinning, has a steel spring clip around the base body as reinforcement to reduce wear and seal the suction slit against false air
DE10056668A1 (en) * 2000-11-09 2002-05-16 Fritz Stahlecker Condensing stage for drawn sliver, at a sliver drawing unit, has a sliding surface for the transport belt formed by an insert into the suction slit of the suction channel, which can be replaced when worn
EP1215313A2 (en) * 2000-12-13 2002-06-19 Maschinenfabrik Rieter Ag Reinforcement for a suction channel in a fibre condensing device of a spinning machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100355966C (en) * 2005-02-25 2007-12-19 宁波德昌精密纺织机械有限公司 Collecting tube for compact spining
DE102012110899A1 (en) 2012-11-13 2014-05-15 Wilhelm Stahlecker Gmbh Insert for pneumatic compression device for compression spinning on spinning machine, has lateral guide surfaces for lateral guidance of conveyor belt in region of clamping point, particularly in lateral extension of clamping line

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