WO2002042535A1 - Device on a spinning machine for compressing a fibre bundle - Google Patents

Device on a spinning machine for compressing a fibre bundle Download PDF

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Publication number
WO2002042535A1
WO2002042535A1 PCT/EP2001/011447 EP0111447W WO0242535A1 WO 2002042535 A1 WO2002042535 A1 WO 2002042535A1 EP 0111447 W EP0111447 W EP 0111447W WO 0242535 A1 WO0242535 A1 WO 0242535A1
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WO
WIPO (PCT)
Prior art keywords
roller
conveyor belt
compression zone
lower roller
sliding surface
Prior art date
Application number
PCT/EP2001/011447
Other languages
German (de)
French (fr)
Inventor
Gernot SCHÄFFLER
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 JP2002545231A priority Critical patent/JP2004514800A/en
Publication of WO2002042535A1 publication Critical patent/WO2002042535A1/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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
    • 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 device on a spinning machine for compacting a fiber structure, with a pair of output rollers that delimit the draft zone of a drafting system and contain a driven lower roller and a pressure roller, with a compression zone following the draft zone, with an air-permeable conveyor belt that transports the fiber structure through the compression zone assigned to the compression zone, the conveyor belt guiding the conveyor belt on a sliding surface, with a suction slot located in the sliding surface, with a clamping roller which delimits the end of the compression zone and is pressed onto the sliding surface, with a deflecting roller which excites the conveyor belt and with drive elements for the conveyor belt coupled to the bottom roller ,
  • a so-called spin triangle is created at the exit nip line of the exit 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 into the twisted thread and thus contribute little or nothing to the strength of the spun thread. It has therefore recently started to assign a so-called compression zone to the draft zone of the drafting system, which in turn is delimited on the outlet side by a delivery clamping line. Only then is the thread spun. The fibers are bundled or compressed in the compression zone, whereby the fiber structure is so narrow when leaving the delivery clamping line that the dreaded spinning triangle no longer arises. The spun thread then becomes more even, firmer and less hairy.
  • a device of the type mentioned at the outset for compacting a fiber structure is known from DE 199 11 333 A1.
  • the drive of the conveyor belt is derived from the lower roller of the pair of output rollers over several friction stages.
  • the lower roller drives the pressure roller pressed against it, to which in turn the clamping roller delimiting the compression zone on the outlet side is connected via a drive belt.
  • the clamping roller which presses the conveyor belt against the sliding surface of the suction channel, then in turn drives the conveyor belt by friction.
  • a disadvantage of the known drive is the fact that the clamping roller must be pressed against the conveyor belt with a minimum pressure to enable the friction drive, which pressure is higher than would be required for the function of a swirl stop. In conjunction with the friction of the conveyor belt on the sliding surface, this leads to increased wear of the suction channel in the area of the delivery clamping line.
  • the invention is based on the object of deriving the drive for the conveyor belt from the lower roller of the pair of output rollers and still making the pressure of the pinch roller against the sliding surface only as large as is necessary for a swirl stop.
  • the deflection roller is arranged in the region of the lower roller and forms a wedge gap with it, and in that the drive elements contain an intermediate roller which lies in the wedge gap on the lower roller and on the deflection roller.
  • the conveyor belt is now no longer driven by friction, as in the prior art mentioned at the beginning, at which it slides over a sliding surface, but is clamped between two rotating rollers or rollers at the location of its friction drive.
  • the deflection roller is sprung against the intermediate roller. Because of the same direction of movement of the deflection roller and the intermediate roller, there is no significant wear at the point of the drive transmission, despite a sufficiently high contact pressure.
  • the pinch roller which in turn is now driven by the conveyor belt, only needs to apply the pressure required for a twist stop at the delivery nip line, so that at the critical point of the clamping line, the closing of the suction channel becomes significantly less. At the same time, the power requirement for the drive becomes smaller.
  • the intermediate roller is provided with a suitable friction lining.
  • the intermediate roller only rests on the lateral ring bundles of the deflection roller and the conveyor belt is carried along by the wrap angle on the deflection roller, it is more advantageous if the conveyor belt is clamped between the deflection roller and the intermediate roller at its drive point.
  • the speed of the conveyor belt should be somewhat greater than the peripheral speed of the pair of output rollers.
  • the lower roller is provided with an enlarged diameter ring collar on which the intermediate roller rests. This collar can be an easily exchangeable disc, so that fine adjustment of the tensioning delay is possible if necessary.
  • FIG. 1 shows a partially sectioned side view of a device according to the invention
  • Figure 2 is a view in the direction of arrow II of Figure 1 of the actual compression zone and the drive elements of the conveyor belt.
  • a spinning machine in particular a ring spinning machine
  • a device for compacting a fiber structure 1 From the drafting unit 2 itself, only a pair of output rollers 3 and a pair of apron rollers 4 in front of it are drawn with a bottom strap 5 and an top strap 6.
  • the output roller pair 3 in turn consists of a driven lower roller 7 and a pressure roller 8, which defines an output nip line 9 with the lower roller 7.
  • the draft zone of the drafting unit 2 is ended at the output clamping line 9.
  • a sliver or roving 10 is drawn in the transport direction A to the desired fineness in a known manner.
  • a compression zone 11 in which the stretched, but still spinning-free fiber structure 1 is bundled or compressed.
  • An air-permeable conveyor belt 12 belongs to the compression zone 11 and can be designed as a thin, fine-mesh fabric belt made of polyamide threads.
  • the conveyor belt 12 transports the fiber structure 1 to be compressed through the compression zone 11 and is guided over a stationary sliding surface 13.
  • the sliding surface 13 is preferably the outer contour of a suction channel 14 which is under vacuum and which preferably extends over a plurality of spinning positions.
  • the suction channel 14 is connected to a vacuum source (not shown) via a vacuum connection 15.
  • the suction slot 16 In the sliding surface 13 there is a suction slot 16, which extends essentially in the transport direction A, but at a slight angle to the direction of movement of the conveyor belt 12. On its inner side in the running direction, the suction slot 16 has a so-called gathering edge 17, along which the compressing fiber dressing 1 moves and at the same time unrolls easily.
  • the conveyor belt 12 is also guided over a deflection roller 18 which is arranged at a distance from the suction slot 16, extends over a plurality of spinning positions and tensions the conveyor belt 12.
  • a clamping roller 19 is provided which presses the fiber assembly 1 together with the conveyor belt 12 against the sliding surface 13 on a delivery clamping line 20 and which is driven by the conveyor belt 12.
  • the delivery clamping line 20 thus delimits the compression zone 11 and at the same time acts as a swirl stop for the subsequent spin rotation which is not intended to run back into the compression zone 11.
  • the spun thread 21 is formed, which is fed in the delivery direction B to a twist yarn, not shown, for example a ring spindle.
  • the drafting system 2 includes, in a known manner, a load carrier 22 which, in addition to the pressure roller 8 and the other pressure rollers of the drafting system 2, which are not described in any more detail, also carries the clamping roller 19. Because of the very different loading pressures of the pressure roller 8 and the clamping roller 19, the loading device of the load carrier 22 consists of one Compression spring 23 for the pressure roller 8 and a compression spring 24 for the pinch roller 19. The force of the compression spring 23 is a multiple of the force of the compression spring 24.
  • the driven lower roller 7 and the other lower rollers of the drafting unit 2 which are not shown or designated in any more detail, run in the usual manner in the longitudinal direction of the spinning machine and are mounted at useful intervals in so-called drafting unit punches 25, one of which is indicated in FIG. These drafting system punches 25 also hold the suction channel 14 and the deflection roller 18.
  • the deflection roller 18 is arranged according to the invention in the immediate vicinity of the lower roller 7 and forms a wedge gap 29 therewith.
  • this wedge gap 29 there is an intermediate roller 27, which is also mounted in the drafting device punch 25 and which is located both on the lower roller 7 and on the deflection roller 18 rests springy.
  • the intermediate roller 27 is driven by the lower roller 7 and in turn drives the deflection roller 18 and at the same time the conveyor belt 12 by friction.
  • the intermediate roller 27 is provided with a suitable friction lining 28.
  • the lower roller 7 is provided near the drafting device punch 25 with a ring collar of enlarged diameter, which is formed, for example, by an interchangeable disk 26 can be.
  • the intermediate roller 27 is thus only against this disc 26 and is driven by this. Since the disk 26 has a somewhat larger diameter than the diameter of the actual lower roller 7, the necessary tensioning delay on the fiber structure 1 is given.

Abstract

The drawing unit on a spinning machine follows a compressing zone for compressing a drawn, non-spinning fibre bundle. The compression zone comprises an air-permeable transport belt (12), for transporting the fibre bundle through the compression zone. The transport belt runs on a slide surface (13) of a suction channel (14) and is tensioned by a guide roller (18). A suction slot, running essentially in the transport direction of the fibre bundle is arranged in the slide surface (13). The end of the compression zone is marked by a pinch roller (19) which presses the fibre bundle and the transport belt to the slide surface (13). The guide roller is arranged in the region of the driven lower roller (7) of the output roller pair (7, 8) on the drawing unit and forms a V groove therewith. An intermediate groove is on both the lower roller and the guide roller in the V groove (29) and thus drives the transport belt.

Description

Vorrichtung an einer Spinnmaschine zum Verdichten eines Faserverbandes Device on a spinning machine for compacting a fiber structure
Die Erfindung betrifft eine Vorrichtung an einer Spinnmaschine zum Verdichten eines Faserverbandes, mit einem die Verzugszone eines Streckwerks begrenzenden, eine angetriebene Unterwalze und eine Druckwalze enthaltenden Ausgangswalzenpaar, mit einer der Verzugszone folgenden Verdichtungszone, mit einem den Faserverband durch die Verdichtungszone transportierenden luftdurchlässigen Transportband, mit einem der Verdichtungszone zugeordneten, das Transportband auf einer Gleitfläche führenden Saugkanal, mit einem in der Gleitfläche befindlichen Saugschlitz, mit einer das Ende der Verdichtungszone begrenzenden, an die Gleitfläche angedrückten Klemmwalze, mit einer das Transportband spannenden Umlenkrolle sowie mit mit der Unterwalze gekoppelten Antriebselementen für das Transportband.The invention relates to a device on a spinning machine for compacting a fiber structure, with a pair of output rollers that delimit the draft zone of a drafting system and contain a driven lower roller and a pressure roller, with a compression zone following the draft zone, with an air-permeable conveyor belt that transports the fiber structure through the compression zone assigned to the compression zone, the conveyor belt guiding the conveyor belt on a sliding surface, with a suction slot located in the sliding surface, with a clamping roller which delimits the end of the compression zone and is pressed onto the sliding surface, with a deflecting roller which excites the conveyor belt and with drive elements for the conveyor belt coupled to the bottom roller ,
Wenn einem verstreckten Faserverband in unmittelbarem Anschluss an das Ausgangswalzenpaar eines Streckwerks 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 Faden eingebunden werden und somit wenig oder nichts zur Festigkeit des ersponnenen Fadens beitragen. Man ist daher in jüngerer Zeit dazu übergegangen, der Verzugszone des Streckwerks eine so genannte Verdichtungszone nachzuordnen, die ihrerseits von einer Lieferklemmlinie auslaufseitig begrenzt wird. Erst danach wird dem Faden die Spinndrehung erteilt. In der Verdichtungszone werden die Fasern gebündelt oder verdichtet, wodurch der Faserverband beim Verlassen der Lieferklemmlinie so schmal ist, dass das gefürchtete Spinndreieck nicht mehr entsteht. Der ersponnene Faden wird dann gleichmäßiger, fester und weniger haarig.If a spun twist is given to a drawn fiber structure immediately after the exit roller pair of a drafting system, a so-called spin triangle is created at the exit nip line of the exit 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 into the twisted thread and thus contribute little or nothing to the strength of the spun thread. It has therefore recently started to assign a so-called compression zone to the draft zone of the drafting system, which in turn is delimited on the outlet side by a delivery clamping line. Only then is the thread spun. The fibers are bundled or compressed in the compression zone, whereby the fiber structure is so narrow when leaving the delivery clamping line that the dreaded spinning triangle no longer arises. The spun thread then becomes more even, firmer and less hairy.
Eine Vorrichtung der eingangs genannten Art zum Verdichten eines Faserverbandes ist durch die DE 199 11 333 A1 Stand der Technik. Bei dieser bekannten Vorrichtung wird der Antrieb des Transportbandes über mehrere Friktionsstufen von der Unterwalze des Ausgangswalzenpaares abgeleitet. Die Unterwalze treibt die gegen sie angedrückte Druckwalze an, mit welcher wiederum die die Verdichtungszone auslaufseitig begrenzende Klemmwalze über ein Antriebsband verbunden ist. Die Klemmwalze, welche das Transportband an die Gleitfläche des Saugkanals andrückt, treibt dann ihrerseits das Transportband durch Friktion an.A device of the type mentioned at the outset for compacting a fiber structure is known from DE 199 11 333 A1. In this known device the drive of the conveyor belt is derived from the lower roller of the pair of output rollers over several friction stages. The lower roller drives the pressure roller pressed against it, to which in turn the clamping roller delimiting the compression zone on the outlet side is connected via a drive belt. The clamping roller, which presses the conveyor belt against the sliding surface of the suction channel, then in turn drives the conveyor belt by friction.
Nachteilig an dem bekannten Antrieb ist die Tatsache, dass die Klemmwalze zum Ermöglichen des Friktionsantriebes mit einem Mindestdruck an das Transportband angedrückt sein muss, der höher ist, als er an sich für die Funktion eines Drallstopps erforderlich wäre. Im Zusammenwirken mit der Reibung des Transportbandes an der Gleitfläche führt dies im Bereich der Lieferklemmlinie zu einem erhöhten Verschleiß des Saugkanales.A disadvantage of the known drive is the fact that the clamping roller must be pressed against the conveyor belt with a minimum pressure to enable the friction drive, which pressure is higher than would be required for the function of a swirl stop. In conjunction with the friction of the conveyor belt on the sliding surface, this leads to increased wear of the suction channel in the area of the delivery clamping line.
Der Erfindung liegt die Aufgabe zu Grunde, den Antrieb für das Transportband von der Unterwalze des Ausgangswalzenpaares abzuleiten und dennoch den Andruck der Klemmwalze an die Gleitfläche nur so groß zu machen, wie dies für einen Drallstopp erforderlich ist.The invention is based on the object of deriving the drive for the conveyor belt from the lower roller of the pair of output rollers and still making the pressure of the pinch roller against the sliding surface only as large as is necessary for a swirl stop.
Die Aufgabe wird dadurch gelöst, dass die Umlenkrolle im Bereich der Unterwalze angeordnet ist und mit dieser einen Keilspalt bildet, und dass die Antriebselemente eine Zwischenwalze enthalten, die im Keilspalt an der Unterwalze und an der Umlenkrolle anliegt.The object is achieved in that the deflection roller is arranged in the region of the lower roller and forms a wedge gap with it, and in that the drive elements contain an intermediate roller which lies in the wedge gap on the lower roller and on the deflection roller.
Das Transportband wird jetzt nicht mehr, wie beim eingangs genannten Stand der Technik, an einer Stelle durch Friktion angetrieben, an welcher es über eine Gleitfläche gleitet, sondern an der Stelle seines Friktionsantriebes zwischen zwei sich drehenden Rollen bzw. Walzen geklemmt. Die Umlenkrolle is dabei gegen die Zwischenwalze angefedert. Wegen der gleichsinnigen Bewegungsrichtung der Umlenkrolle und der Zwischenwalze gibt es an der Stelle der Antriebsübertragung trotz eines ausreichend hohen Anpressdruckes keinen nennenswerten Verschleiß. Die Klemmwalze, die jetzt ihrerseits vom Transportband angetrieben wird, braucht an der Lieferklemmlinie nur noch den für einen Drallstopp erforderlichen Andruck aufzubringen, so dass an der kritischen Stelle der Klemmlinie der Verschließ des Saugkanales deutlich geringer wird. Gleichzeitig wird auch der Kraftbedarf für den Antrieb kleiner.The conveyor belt is now no longer driven by friction, as in the prior art mentioned at the beginning, at which it slides over a sliding surface, but is clamped between two rotating rollers or rollers at the location of its friction drive. The deflection roller is sprung against the intermediate roller. Because of the same direction of movement of the deflection roller and the intermediate roller, there is no significant wear at the point of the drive transmission, despite a sufficiently high contact pressure. The pinch roller, which in turn is now driven by the conveyor belt, only needs to apply the pressure required for a twist stop at the delivery nip line, so that at the critical point of the clamping line, the closing of the suction channel becomes significantly less. At the same time, the power requirement for the drive becomes smaller.
Damit das Transportband von der Zwischenwalze sicher mitgenommen wird, ist die Zwischenwalze mit einem geeigneten Friktionsbelag versehen. Zwar ist es denkbar, dass die Zwischenwalze nur an seitlichen Ringbunden der Umlenkrolle anliegt und das Transportband durch den Umschlingungswinkel an der Umlenkrolle mitgenommen wird, doch ist es vorteilhafter, wenn das Transportband an seiner Antriebsstelle zwischen der Umlenkrolle und der Zwischenwalze geklemmt wird.To ensure that the conveyor belt is safely carried along by the intermediate roller, the intermediate roller is provided with a suitable friction lining. Although it is conceivable that the intermediate roller only rests on the lateral ring bundles of the deflection roller and the conveyor belt is carried along by the wrap angle on the deflection roller, it is more advantageous if the conveyor belt is clamped between the deflection roller and the intermediate roller at its drive point.
Da es zweckmäßig ist, dem Faserverband in der Verdichtungszone einen gewissen Anspannverzug zu geben, sollte die Geschwindigkeit des Transportbandes etwas größer sein als die Umfangsgeschwindigkeit des Ausgangswalzenpaares. Aus diesem Grund ist die Unterwalze mit einem Ringbund vergrößerten Durchmessers versehen, an dem die Zwischenwalze anliegt. Bei diesem Ringbund kann es sich um eine leicht auswechselbare Scheibe handeln, so dass eine Feinanpassung des Anspannverzugs bei Bedarf möglich wird.Since it is advisable to give the fiber structure a certain amount of tension in the compression zone, the speed of the conveyor belt should be somewhat greater than the peripheral speed of the pair of output rollers. For this reason, the lower roller is provided with an enlarged diameter ring collar on which the intermediate roller rests. This collar can be an easily exchangeable disc, so that fine adjustment of the tensioning delay is possible if necessary.
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 auf eine erfindungsgemäße Vorrichtung,FIG. 1 shows a partially sectioned side view of a device according to the invention,
Figur 2 eine Ansicht in Richtung des Pfeiles II der Figur 1 auf die eigentliche Verdichtungszone und die Antriebselemente des Transportbandes.Figure 2 is a view in the direction of arrow II of Figure 1 of the actual compression zone and the drive elements of the conveyor belt.
Von einer Spinnmaschine, insbesondere einer Ringspinnmaschine, ist im Zusammenhang mit einer Vorrichtung zum Verdichten eines Faserverbandes 1 lediglich der Endbereich eines Streckwerks 2 dargestellt. Vom Streckwerk 2 selbst sind nur ein Ausgangswalzenpaar 3 sowie ein davor befindliches Riemchenwalzenpaar 4 mit einem Unterriemchen 5 und einem Oberriemchen 6 gezeichnet. Das Ausgangswalzenpaar 3 seinerseits besteht aus einer angetriebenen Unterwalze 7 sowie einer Druckwalze 8, die mit der Unterwalze 7 eine Ausgangsklemmlinie 9 definiert. An der Ausgangsklemmlinie 9 ist die Verzugszone des Streckwerks 2 beendet. Im Streckwerk 2 wird in bekannter Weise ein Faserband oder auch ein Vorgarn 10 in Transportrichtung A bis zur gewünschten Feinheit verzogen. Im Anschluss an das Ausgangswalzenpaar 3 folgt dann eine Verdichtungszone 11 , in welcher der verstreckte, jedoch noch spinndrehungsfreie Faserverband 1 gebündelt oder verdichtet wird.Of a spinning machine, in particular a ring spinning machine, only the end region of a drafting unit 2 is shown in connection with a device for compacting a fiber structure 1. From the drafting unit 2 itself, only a pair of output rollers 3 and a pair of apron rollers 4 in front of it are drawn with a bottom strap 5 and an top strap 6. The output roller pair 3 in turn consists of a driven lower roller 7 and a pressure roller 8, which defines an output nip line 9 with the lower roller 7. The draft zone of the drafting unit 2 is ended at the output clamping line 9. In the drafting unit 2, a sliver or roving 10 is drawn in the transport direction A to the desired fineness in a known manner. Following the pair of output rollers 3 there follows a compression zone 11, in which the stretched, but still spinning-free fiber structure 1 is bundled or compressed.
Zur Verdichtungszone 11 gehört ein luftdurchlässiges Transportband 12, das als dünnes feinmaschiges Gewebeband aus Polyamidfäden ausgebildet sein kann. Das Transportband 12 transportiert den zu verdichtenden Faserverband 1 durch die Verdichtungszone 11 hindurch und ist dabei über eine stationäre Gleitfläche 13 geführt. Bei der Gleitfläche 13 handelt es sich vorzugsweise um die Außenkontur eines unter Unterdruck stehenden Saugkanals 14, der sich bevorzugt über mehrere Spinnstellen erstreckt. Über einen Unterdruckanschluss 15 ist der Saugkanal 14 mit einer nicht dargestellten Unterdruckquelle verbunden.An air-permeable conveyor belt 12 belongs to the compression zone 11 and can be designed as a thin, fine-mesh fabric belt made of polyamide threads. The conveyor belt 12 transports the fiber structure 1 to be compressed through the compression zone 11 and is guided over a stationary sliding surface 13. The sliding surface 13 is preferably the outer contour of a suction channel 14 which is under vacuum and which preferably extends over a plurality of spinning positions. The suction channel 14 is connected to a vacuum source (not shown) via a vacuum connection 15.
In der Gleitfläche 13 befindet sich ein Saugschlitz 16, der sich im Wesentlichen in Transportrichtung A erstreckt, jedoch leicht schräg zur Bewegungsrichtung des Transportbandes 12. An seiner in Laufrichtung inneren Seite weist der Saugschlitz 16 eine so genannte Raffkante 17 auf, längs welcher sich der zu verdichtende Faserverband 1 bewegt und dabei gleichzeitig leicht abrollt.In the sliding surface 13 there is a suction slot 16, which extends essentially in the transport direction A, but at a slight angle to the direction of movement of the conveyor belt 12. On its inner side in the running direction, the suction slot 16 has a so-called gathering edge 17, along which the compressing fiber dressing 1 moves and at the same time unrolls easily.
Außer über die Gleitfläche 13 ist das Transportband 12 noch über eine Umlenkrolle 18 geführt, die im Abstand vom Saugschlitz 16 angeordnet ist, sich über mehrere Spinnstellen erstreckt und das Transportband 12 spannt.In addition to the sliding surface 13, the conveyor belt 12 is also guided over a deflection roller 18 which is arranged at a distance from the suction slot 16, extends over a plurality of spinning positions and tensions the conveyor belt 12.
Am auslaufseitigen Ende der Verdichtungszone 11 ist eine Klemmwalze 19 vorgesehen, die an einer Lieferklemmlinie 20 den Faserverband 1 zusammen mit dem Transportband 12 gegen die Gleitfläche 13 drückt und die vom Transportband 12 angetrieben ist. Die Lieferklemmlinie 20 begrenzt somit die Verdichtungszone 11 und wirkt zugleich als Drallstopp für die anschließend aufzubringende Spinndrehung, die nicht bis in die Verdichtungszone 11 zurücklaufen soll. Ab der Lieferklemmlinie 20 entsteht dann der ersponnene Faden 21 , der in Lieferrichtung B einem nicht dargestellten Drallorgarn, beispielsweise einer Ringspindel, zugeführt wird.At the outlet-side end of the compression zone 11, a clamping roller 19 is provided which presses the fiber assembly 1 together with the conveyor belt 12 against the sliding surface 13 on a delivery clamping line 20 and which is driven by the conveyor belt 12. The delivery clamping line 20 thus delimits the compression zone 11 and at the same time acts as a swirl stop for the subsequent spin rotation which is not intended to run back into the compression zone 11. From the delivery clamping line 20, the spun thread 21 is formed, which is fed in the delivery direction B to a twist yarn, not shown, for example a ring spindle.
Zum Streckwerk 2 gehört in bekannter Weise ein Belastungsträger 22, der neben der Druckwalze 8 und den übrigen nicht näher bezeichneten Druckwalzen des Streckwerks 2 auch die Klemmwalze 19 trägt. Wegen der sehr unterschiedlichen Belastungsdrücke der Druckwalze 8 und der Klemmwalze 19 besteht die Belastungseinrichtung des Belastungstrεgers 22 aus einer Druckfeder 23 für die Druckwalze 8 und einer Druckfeder 24 für die Klemmwalze 19. Die Kraft der Druckfeder 23 beträgt dabei ein Mehrfaches der Kraft der Druckfeder 24.The drafting system 2 includes, in a known manner, a load carrier 22 which, in addition to the pressure roller 8 and the other pressure rollers of the drafting system 2, which are not described in any more detail, also carries the clamping roller 19. Because of the very different loading pressures of the pressure roller 8 and the clamping roller 19, the loading device of the load carrier 22 consists of one Compression spring 23 for the pressure roller 8 and a compression spring 24 for the pinch roller 19. The force of the compression spring 23 is a multiple of the force of the compression spring 24.
Die angetriebene Unterwalze 7 sowie die übrigen nicht näher dargestellten oder bezeichneten Unterwalzen des Streckwerks 2 laufen in üblicher Weise in Längsrichtung der Spinnmaschine durch und sind in nützlichen Abständen in so genannten Streckwerksstanzen 25 gelagert, von denen in Figur 2 eine angedeutet ist. Diese Streckwerksstanzen 25 haltern auch den Saugkanal 14 sowie die Umlenkrolle 18.The driven lower roller 7 and the other lower rollers of the drafting unit 2, which are not shown or designated in any more detail, run in the usual manner in the longitudinal direction of the spinning machine and are mounted at useful intervals in so-called drafting unit punches 25, one of which is indicated in FIG. These drafting system punches 25 also hold the suction channel 14 and the deflection roller 18.
Die Umlenkrolle 18 ist erfindungsgemäß in unmittelbarer Nähe der Unterwalze 7 angeordnet und bildet mit dieser einen Keilspalt 29. In diesem Keilspalt 29 befindet sich eine Zwischenwalze 27, die ebenfalls in der Streckwerksstanze 25 gelagert ist und die sowohl an der Unterwalze 7 als auch an der Umlenkrolle 18 angefedert anliegt. Die Zwischenwalze 27 wird dabei von der Unterwalze 7 angetrieben und treibt ihrerseits durch Friktion die Umlenkrolle 18 und gleichzeitig das Transportband 12 an. Zu diesem Zweck ist die Zwischenwalze 27 mit einem geeigneten Friktionsbelag 28 versehen.The deflection roller 18 is arranged according to the invention in the immediate vicinity of the lower roller 7 and forms a wedge gap 29 therewith. In this wedge gap 29 there is an intermediate roller 27, which is also mounted in the drafting device punch 25 and which is located both on the lower roller 7 and on the deflection roller 18 rests springy. The intermediate roller 27 is driven by the lower roller 7 and in turn drives the deflection roller 18 and at the same time the conveyor belt 12 by friction. For this purpose, the intermediate roller 27 is provided with a suitable friction lining 28.
Wie insbesondere aus Figur 1 ersichtlich, gibt es an der Stelle des Friktionsantriebes zwei gleichlaufend bewegte Bauteile, nämlich die Zwischenwalze 27 und die Umlenkrolle 18. Aus diesem Grund gibt es trotz der für den Friktionsantrieb erforderlichen Anpresskraft praktisch keinen Verschleiß. Die Klemmwalze 19, die ihrerseits jetzt vom Transportband 12 angetrieben wird, braucht nur noch mit einer solchen Kraft im Bereich der Lieferklemmlinie 20 gegen die Gleitfläche 13 drücken, dass der erwünschte Drallstopp gewährleistet ist.As can be seen in particular from FIG. 1, there are two components moving in the same direction at the location of the friction drive, namely the intermediate roller 27 and the deflection roller 18. For this reason, there is practically no wear despite the contact pressure required for the friction drive. The clamping roller 19, which in turn is now driven by the conveyor belt 12, only needs to press against the sliding surface 13 with such a force in the region of the delivery clamping line 20 that the desired swirl stop is ensured.
Damit die Geschwindigkeit des Transportbandes 12 zum Erzeugen eines leichten Anspannverzuges auf den Faserverband 1 etwas größer ist als die Umfangsgeschwindigkeit des Ausgangswalzenpaares 3, ist die Unterwalze 7 in der Nähe der Streckwerksstanze 25 mit einem Ringbund vergrößerten Durchmessers versehen, der beispielsweise durch eine auswechselbare Scheibe 26 gebildet sein kann. Die Zwischenwalze 27 liegt somit nur an dieser Scheibe 26 an und wird von dieser angetrieben. Da die Scheibe 26 im Vergleich zum Durchmesser der eigentlichen Unterwalze 7 einen etwas vergrößerten Durchmesser aufweist, ist der erforderliche Anspannverzug auf den Faserverband 1 gegeben. So that the speed of the conveyor belt 12 for producing a slight tensioning distortion on the fiber structure 1 is somewhat greater than the peripheral speed of the pair of output rollers 3, the lower roller 7 is provided near the drafting device punch 25 with a ring collar of enlarged diameter, which is formed, for example, by an interchangeable disk 26 can be. The intermediate roller 27 is thus only against this disc 26 and is driven by this. Since the disk 26 has a somewhat larger diameter than the diameter of the actual lower roller 7, the necessary tensioning delay on the fiber structure 1 is given.

Claims

Patentansprüche claims
1. Vorrichtung an einer Spinnmaschine zum Verdichten eines Faserverbandes, mit einem die Verzugszone eines Streckwerks begrenzenden, eine angetriebene Unterwalze und eine Druckwalze enthaltenden Ausgangswalzenpaar, mit einer der Verzugszone folgenden Verdichtungszone, mit einem den Faserverband durch die Verdichtungszone transportierenden luftdurchlässigen Transportband, mit einem der Verdichtungszone zugeordneten, das Transportband auf einer Gleitfläche führenden Saugkanal, mit einem in der Gleitfläche befindlichen Saugschlitz, mit einer das Ende der Verdichtungszone begrenzenden, an die Gleitfläche angedrückten Klemmwalze, mit einer das Transportband spannenden Umlenkrolle sowie mit mit der Unterwalze gekoppelten Antriebselementen für das Transportband, dadurch gekennzeichnet, dass die Umlenkrolle (18) im Bereich der Unterwalze (7) angeordnet ist und mit dieser einen Keilspalt (29) bildet, und dass die Antriebselemente eine Zwischenwalze (27) enthalten, die im Keilspalt (29) an der Unterwalze (7) und an der Umlenkrolle (18) anliegt.1.Device on a spinning machine for compacting a fiber structure, with a pair of output rollers delimiting the draft zone of a drafting system, containing a driven lower roller and a pressure roller, with a compression zone following the draft zone, with an air-permeable conveyor belt transporting the fiber structure through the compression zone, with one of the compression zone assigned suction channel guiding the conveyor belt on a sliding surface, with a suction slot located in the sliding surface, with a clamping roller which delimits the end of the compression zone and is pressed onto the sliding surface, with a deflecting roller which excites the conveyor belt and with drive elements for the conveyor belt coupled to the lower roller, thereby characterized in that the deflecting roller (18) is arranged in the region of the lower roller (7) and forms a wedge gap (29) with it, and that the drive elements contain an intermediate roller (27) which a. in the wedge gap (29) n of the lower roller (7) and on the deflection roller (18).
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Zwischenwalze (27) mit einem Friktionsbelag (28) versehen ist.2. Device according to claim 1, characterized in that the intermediate roller (27) is provided with a friction lining (28).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Transportband (12) zwischen der Umlenkrolle (18) und der Zwischenwalze (27) geklemmt ist.3. Device according to claim 1 or 2, characterized in that the conveyor belt (12) between the deflection roller (18) and the intermediate roller (27) is clamped.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Unterwalze (7) mit einem Ringbund (26) vergrößerten Durchmessers versehen ist, an dem die Zwischenwalze (27) anliegt.4. Device according to one of claims 1 to 3, characterized in that the lower roller (7) is provided with an annular collar (26) of enlarged diameter, on which the intermediate roller (27) rests.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Ringbund durch eine auswechselbare Scheibe (26) gebildet ist. 5. The device according to claim 4, characterized in that the annular collar is formed by an interchangeable disc (26).
PCT/EP2001/011447 2000-11-24 2001-10-04 Device on a spinning machine for compressing a fibre bundle WO2002042535A1 (en)

Priority Applications (1)

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JP2002545231A JP2004514800A (en) 2000-11-24 2001-10-04 Spinning machinery for condensing sliver

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DE2000158892 DE10058892A1 (en) 2000-11-24 2000-11-24 Condensing stage for drawn sliver, at the drawing unit for a spinner, has a deflection roller for the sliver transport belt working with an intermediate drive roller to take the drive from the lower drawing roller
DE10058892.1 2000-11-24

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WO2019115351A1 (en) * 2017-12-15 2019-06-20 Maschinenfabrik Rieter Ag Spinning machine and compaction device

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CN1320183C (en) * 2003-06-25 2007-06-06 东台纺织机械有限责任公司 Fiber collecting device for ring spinning frame
DE10343316A1 (en) * 2003-09-10 2005-04-14 Wilhelm Stahlecker Gmbh Fiber strand focussing apparatus of spinning machine, has tension roller that arranged at down stream side of deflection roller, enables deflection roller to deflect transport belt at specific angle
CN100351445C (en) * 2004-08-10 2007-11-28 东台纺织机械有限责任公司 Fibre bundles centralizing device with pressure
DE102013113406A1 (en) * 2013-12-03 2015-06-03 Maschinenfabrik Rieter Ag Insert and spinning machine
DE102015109269A1 (en) * 2015-05-18 2016-11-24 Maschinenfabrik Rieter Ag Load carrier for upper rollers of a drafting system and compression spring
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DE19837178A1 (en) * 1998-08-17 2000-02-24 Stahlecker Fritz Condensing apparatus for drawn sliver at a ring spinner has a clamping roller with a rotating surface speed faster than the rotary speed of the final pair of drawing rollers

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WO1998039505A2 (en) * 1997-03-03 1998-09-11 Csm-Sächsische Spinnereimaschinen Gmbh Drawing mechanism for spinning frames with a fibre bunching zone and ring-spinning frame equipped therewith
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DE19837178A1 (en) * 1998-08-17 2000-02-24 Stahlecker Fritz Condensing apparatus for drawn sliver at a ring spinner has a clamping roller with a rotating surface speed faster than the rotary speed of the final pair of drawing rollers

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CN1309891C (en) * 2002-09-17 2007-04-11 株式会社丰田自动织机 Fibre bundle buncher for spinning machine
WO2019115351A1 (en) * 2017-12-15 2019-06-20 Maschinenfabrik Rieter Ag Spinning machine and compaction device

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CN1254571C (en) 2006-05-03
DE10058892A1 (en) 2002-06-06
JP2004514800A (en) 2004-05-20
ITMI20012423A1 (en) 2003-05-16
CN1395631A (en) 2003-02-05

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