EP0574659B1 - Method and device for separating a sliver delivered in a can on a drawing frame - Google Patents

Method and device for separating a sliver delivered in a can on a drawing frame Download PDF

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Publication number
EP0574659B1
EP0574659B1 EP93104391A EP93104391A EP0574659B1 EP 0574659 B1 EP0574659 B1 EP 0574659B1 EP 93104391 A EP93104391 A EP 93104391A EP 93104391 A EP93104391 A EP 93104391A EP 0574659 B1 EP0574659 B1 EP 0574659B1
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EP
European Patent Office
Prior art keywords
sliver
guide channel
compressed
nozzles
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP93104391A
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German (de)
French (fr)
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EP0574659A1 (en
Inventor
Albert Kriegler
Alfons Zehndbauer
Michael Strobel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rieter Ingolstadt Spinnereimaschinenbau AG
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Rieter Ingolstadt Spinnereimaschinenbau AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
    • B65H67/0428—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements for cans, boxes and other receptacles
    • B65H67/0434—Transferring material devices between full and empty cans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method and a device for separating a short-staple, textile sliver that is supplied by a drafting system and stored in cans.
  • the point of separation is between the pair of calender rolls (strip take-off roll) and the area of the strip guide channel. When the can has reached the filling level, the sliver must be reliably separated.
  • DE-OS 29 47 342 which corresponds to the preamble of claims 1 and 12, describes a device for separating a textile sliver, the filled jug being under the turntable.
  • the sliver is separated by means of compressed air which is passed through a nozzle.
  • the nozzle is connected to a compressed air tank via a valve and is arranged at the outlet of the strip take-off rollers.
  • the valve is actuated with each can change and opens briefly so that the compressed air emerging from the nozzle hits the inlet opening of the belt guide channel.
  • the usual pitchers have a movable spring plate with compression spring, which is arranged on the bottom of the spring plate.
  • the spring plate lowers as the band filling increases. Due to the compression spring, the spring plate always presses the sliver onto the turntable.
  • This layer of sliver, bridging the gap between the top of the can and the turntable, is called the can mushroom.
  • This jug of mushrooms presses on the turntable. The mouth of the turntable is closed by the jug.
  • Another disadvantage is that the necessary tension only arises when the cans are full, where the filling material (fiber sliver) is pressed tightly onto the turntable. If the filling status of the cans is varied, there are difficulties with the belt separation.
  • the reliability of the tape separation is further reduced in that the position of the tape at the inlet opening of the tape guide channel can not always be central, but offset, so that the air flow directed to the center of the inlet opening of the tape guide channel does not always hit the tape.
  • the object of the invention is to improve the reliability of the band separation with compressed air in the region of the band guide channel when changing cans on the line.
  • the object is achieved according to the method in that the tape delivery in the can is stopped, the mouth of the tape guide channel in the turntable is cleared by moving the can and now a strong stream of compressed air is directed into the inlet opening of the tape guide channel, so that this compressed air flow within the tape guide channel Sliver separates.
  • the compressed air can flow through and securely shred the tape and thus separate it.
  • the compressed air flow can be guided into the inlet opening of the tape guide channel.
  • a slightly frayed band can still be separated by the tension that can be generated in the band guide channel. This is particularly advantageous if the tape has not been broken completely. This can happen when processing different sliver materials.
  • the compressed air flow can be divided into several compressed air flows.
  • the division takes place in such a way that either the compressed air streams run side by side or distributed in a circular manner into the interior of the tape guide channel.
  • the belt is centered by blowing the outer compressed air flows somewhat earlier than the internal compressed air flows.
  • the height of the compressed air streams can be adjusted and fixed in relation to the opening of the sliver guide channel.
  • Another feature is that the sliver is given a defined length by the separation and hangs on the edge of the can.
  • a nozzle directly at the inlet opening of the tape guide channel directs a stream of compressed air into the tape guide channel, so that the tape is reliably defibrated and thus breaks.
  • the air stream can be divided into several individual streams, which are put into operation at different times, so that the sliver is centered in the sliver guide channel before separation.
  • one or more nozzles are arranged at the edge of the inlet opening of the tape guide channel.
  • the blowing direction is inclined approx. 45 ° to the belt and directed into the inlet opening of the belt guide channel.
  • the nozzles are arranged next to one another or in a circle with a blowing direction in the band guide channel.
  • a single nozzle like the nozzles arranged next to one another, is pivotably mounted in one plane over an angular range of 90 ° (perpendicular to parallel to the belt).
  • the circularly arranged nozzles can also be adjusted vertically to open the band guide channel at different heights.
  • the circular nozzles are attached to a nozzle plate, which is connected to an adjustable backdrop. The height of the nozzle plate relative to the opening of the band guide channel can be changed and fixed.
  • the invention has the advantage that the reliability of the pneumatic belt separation was noticeably increased, regardless of the filling status of the can.
  • Compressed air (approx. 6-8 bar), which is led directly into the band guide channel 4 at the mouth at an angle of approximately 45 °, creates a suction that grips the band and frayed it in the upper third of the band guide channel 4.
  • the inclination of the compressed air flow at an angle of approx. 45 ° to the belt also ensures that all compressed air enters the duct and exits at the bottom of the duct (mouth) can, which will certainly break the tape. This is an essential feature for a safe band separation, so that the method also works with different filling states of the can.
  • the compressed air can be divided into a plurality of compressed air flows, all of which are directed into the inlet opening of the band guide channel.
  • Figure 2 shows an embodiment. 4 nozzles are arranged side by side on the edge of the inlet opening of the tape guide channel 4. Their blowing direction is arranged in parallel. All 4 nozzles are operated with compressed air.
  • the two outer nozzles 6.1 and 6.2 are supplied with compressed air somewhat earlier than the two middle (inner) nozzles 6.3 and 6.4. This has the effect that the two outer nozzles 6.1 and 6.2 center the sliver 1 and thus the sliver is guided in the full blowing direction of the two middle nozzles 6.3 and 6.4, so that the compressed air of the two middle nozzles 6.3 and 6.4 which subsequently sets in the sliver 1 certainly hits and frayed so that it breaks.
  • the nozzles are thus operated with a time delay and approximately three air blasts are carried out, so that the fiber sliver is separated by the air blasts and the lower end is ejected from the band guide channel, so that it hangs down at the can edge in a defined length.
  • FIG. 3 shows an arrangement according to which the fiber band is separated by means of six convergent nozzles arranged in a circle around the band guide channel 4. In each case three nozzles 6.5, 6.6, 6.7 are arranged in a nozzle plate 11. The opposite nozzle plate is covered.
  • FIG. 3 shows a side view of one of these nozzle plates 11.
  • Figure 4 shows the arrangement of the three individual nozzles on the nozzle plate 11. It can be seen that the two nozzle plates lie symmetrically in one plane. The nozzles 6.5 to 6.10 are arranged at a height above the opening of the band guide channel 4. Nozzles 6.6 and 6.9 lie opposite each other on the imaginary axis of symmetry of the nozzle plates 11. The two outer nozzles of the nozzle plate are each offset by an angle of 56 ° with respect to these nozzles, which are arranged centrally on the nozzle plate.
  • the nozzles are incorporated in the nozzle plate so that their air jet hits the sliver at an acute angle.
  • the supply of compressed air takes place via pipe socket 14.
  • a hose feed line, which supplies the compressed air, is plugged onto this pipe socket 14.
  • the nozzle plate 11 is carried by a holder 12 which is connected to a displaceable link 13. This also applies to the nozzle plate on the opposite side.
  • the backdrop 13 is vertically displaceable, that is, a stroke relative to the edge of the opening of the tape guide channel 4 is continuously adjustable. This vertical adjustability of the nozzle plate 11 enables an optimal adjustment of the height of the nozzles relative to the opening edge of the tape guide channel.
  • the setting is important from the following point of view: since the belt is clamped between the take-off rollers, it is separated with the arrangement according to the invention approximately one stack length below the clamping point of the take-off rollers.
  • Figure 5 shows a further possible embodiment of the invention.
  • An arrangement of two outer nozzles 6.11 and 6.12 and a movable nozzle 6.13 arranged in the center is shown (two such nozzles can also be next to one another).
  • the nozzles are operated with a time delay, ie the two outer nozzles 6.11 and 6.12 are supplied with compressed air somewhat more (via the feed line 21) than the centrally arranged nozzle 6.13 (via the feed line 20).
  • the two outer nozzles center the sliver during blowing.
  • a short time later (a few tenths of a second) the middle nozzle 6.13 is supplied with compressed air.
  • the nozzle 6.13 is a portable nozzle.
  • the nozzle 6.13 can be displaced in its axial direction towards the sliver.
  • the shift becomes possible when the nozzle 6.13 is supplied with compressed air.
  • the movable body 16 is pressed against the ring spring 17 so that the nozzle 6.13, as an extension of the movable body 16, is pressed and positioned in the immediate vicinity of the sliver 1.
  • the movable body 16 is guided in a guide 15.
  • the nozzle 6.13 additionally carries a bracket 18 in order to detect and avoid the whole of the sliver 1 if it comes into contact with it, that the nozzle is partially immersed in the sliver.
  • This design increases the safety of the belt separation by the proximity that can be achieved between the nozzle and the fiber belt, and it becomes possible to use compressed air at a lower pressure. This reduces the operating costs.

Landscapes

  • Spinning Or Twisting Of Yarns (AREA)
  • Coiling Of Filamentary Materials In General (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Trennen eines kurzstapeligen, textilen Faserbandes, daß von einem Streckwerk geliefert und in Kannen abgelegt wird. Der Trennort liegt zwischen Kalanderwalzenpaar (Bandabzugswalze) und dem Bereich des Bandführungskanals. Wenn die Kanne den Füllungszustand erreicht hat, muß das abgelegte Faserband zuverlässig getrennt werden.The invention relates to a method and a device for separating a short-staple, textile sliver that is supplied by a drafting system and stored in cans. The point of separation is between the pair of calender rolls (strip take-off roll) and the area of the strip guide channel. When the can has reached the filling level, the sliver must be reliably separated.

Die DE-OS 29 47 342, die dem Oberbegriff der Ansprüche 1 und 12 entspricht, beschreibt eine Vorrichtung zum Trennen eines textilen Faserbandes, wobei die gefüllte Kanne unter dem Drehteller steht. Die Trennung des Faserbandes erfolgt mittels Druckluft, die durch eine Düse geführt wird. Die Düse ist über ein Ventil mit einem Druckluftbehälter verbunden und am Ausgang der Bandabzugswalzen angeordnet. Das Ventil wird bei jedem Kannenwechsel betätigt und öffnet kurzzeitig, so daß die aus der Düse austretende Druckluft auf die Eintrittsöffnung des Bandführungskanals trifft.DE-OS 29 47 342, which corresponds to the preamble of claims 1 and 12, describes a device for separating a textile sliver, the filled jug being under the turntable. The sliver is separated by means of compressed air which is passed through a nozzle. The nozzle is connected to a compressed air tank via a valve and is arranged at the outlet of the strip take-off rollers. The valve is actuated with each can change and opens briefly so that the compressed air emerging from the nozzle hits the inlet opening of the belt guide channel.

Bei Füllung der Kannen wird angestrebt, die Kannenfüllung voll auszunutzen und keinen Leerraum zu verschenken. Die üblichen Kannen haben einen beweglichen Federteller mit Druckfeder, die am Boden des Federtellers angeordnet ist. Bei steigender Bandfüllung senkt sich der Federteller. Durch die Druckfeder drückt der Federteller das abgelegte Faserband stets auf den Drehteller. Diese, den Zwischenraum zwischen oberen Kannenrand und Drehteller überbrückenden Lagen Faserband, nennt man den Kannenpilz. Dieser Kannenpilz drückt auf den Drehteller. Die Mündung des Drehtellers ist durch den Kannenpilz verschlossen.When filling the cans, the aim is to make full use of the cans and not to waste any empty space. The usual pitchers have a movable spring plate with compression spring, which is arranged on the bottom of the spring plate. The spring plate lowers as the band filling increases. Due to the compression spring, the spring plate always presses the sliver onto the turntable. This layer of sliver, bridging the gap between the top of the can and the turntable, is called the can mushroom. This jug of mushrooms presses on the turntable. The mouth of the turntable is closed by the jug.

Dies ist die Ursache dafür, daß die Lösung nach DE-OS 29 47 342 nicht zufriedenstellend funktioniert. Der Luftstrom staut sich im Bandführungskanal, so daß das Faserband nicht ausreichend zerfasert werden kann. Gebrochen wird das Band letztlich durch die während des Kannenwechsels entstehende Anspannung des Bandes. Diese plötzliche Anspannung des Bandes beim Kannenverschieben während des Kannenwechsels kann jedoch auch dazu führen, daß das an der Mündung des Bandführungskanals abgewinkelte Band auch an anderer, nicht gewünschter Stelle bricht.This is the reason why the solution according to DE-OS 29 47 342 does not work satisfactorily. The air flow builds up in the ribbon guide channel so that the fiber ribbon cannot be sufficiently defibrated. The tape is ultimately broken by the tension in the tape that occurs during the can change. However, this sudden tensioning of the belt when the can is moved during the change of the can can also result in the belt that is angled at the mouth of the belt guide channel also breaking at another, undesired point.

Ein weiterer Nachteil ist, daß die nötige Anspannung nur bei prall gefüllten Kannen entsteht, wo das Füllmaterial (Faserband) straff auf den Drehteller gepreßt wird. Wird also der Füllungszustand der Kannen variiert, kommt es zu Schwierigkeiten bei der Bandtrennung.Another disadvantage is that the necessary tension only arises when the cans are full, where the filling material (fiber sliver) is pressed tightly onto the turntable. If the filling status of the cans is varied, there are difficulties with the belt separation.

Die Zuverlässigkeit der Bandtrennung ist weiterhin dadurch reduziert, daß die Position des Bandes an der Eintrittsöffnung des Bandführungskanals nicht immer zentral, sondern versetzt sein kann, so daß der auf das Zentrum der Eintrittsöffnung des Bandführungskanals gerichtete Luftstrom nicht immer das Band trifft. Aufgabe der Erfindung ist es, beim Kannenwechsel an der Strecke die Zuverlässigkeit der Bandtrennung mit Druckluft im Bereich des Bandführungskanals zu verbessern.The reliability of the tape separation is further reduced in that the position of the tape at the inlet opening of the tape guide channel can not always be central, but offset, so that the air flow directed to the center of the inlet opening of the tape guide channel does not always hit the tape. The object of the invention is to improve the reliability of the band separation with compressed air in the region of the band guide channel when changing cans on the line.

Die Aufgabe wird verfahrensgemäß dadurch gelöst, daß die Bandlieferung in die Kanne gestoppt wird, die Mündung des Bandführungskanals im Drehteller durch Verschieben der Kanne frei gemacht wird und jetzt ein starker Druckluftstrom in die Eintrittsöffnung des Bandführungskanals gelenkt wird, so daß dieser Druckluftstrom innerhalb des Bandführungskanals das Faserband trennt. Durch das Freimachen der Mündung des Bandführungskanals kann die Druckluft hindurchströmen und das Band sicher zerfasern und somit trennen.The object is achieved according to the method in that the tape delivery in the can is stopped, the mouth of the tape guide channel in the turntable is cleared by moving the can and now a strong stream of compressed air is directed into the inlet opening of the tape guide channel, so that this compressed air flow within the tape guide channel Sliver separates. By clearing the opening of the tape guide channel, the compressed air can flow through and securely shred the tape and thus separate it.

Vorteilhafterweise kann bereits unmittelbar nachdem die Kanne den Rand des Drehtellers verläßt, und somit erstmals beim Verschieben der Kanne mit Sicherheit die Mündung des Bandführungskanals frei von Faserbandlagen ist, der Druckluftstrom in die Eintrittsöffnung des Bandführungskanals geführt werden. Mit dem weiteren Verschieben der Kanne bis in ihre Endposition kann ein gering zerfasertes Band dennoch durch die erzeugbare Anspannung im Bandführungskanal getrennt werden. Das ist insbesondere von Vorteil, wenn das Band nicht vollständig gebrochen wurde. Das kann vorkommen bei der Verarbeitung unterschiedlicher Faserbandmaterialien.Advantageously, immediately after the can leaves the edge of the turntable, and thus for the first time when the can is moved with certainty that the opening of the tape guide channel is free of sliver layers, the compressed air flow can be guided into the inlet opening of the tape guide channel. When the can is moved further into its end position, a slightly frayed band can still be separated by the tension that can be generated in the band guide channel. This is particularly advantageous if the tape has not been broken completely. This can happen when processing different sliver materials.

Ein weiteres Merkmal ist, daß der Druckluftstrom in mehrere Druckluftströme aufgeteilt sein kann. Die Aufteilung erfolgt so, daß entweder die Druckluftströme nebeneinander geführt oder kreisförmig verteilt in das Innere des Bandführungskanals gelenkt werden. Es ergibt sich der Vorteil, daß das Faserband in Verbindung mit dem Trennen zentriert wird, so daß die Trennsicherheit erhöht wird.Another feature is that the compressed air flow can be divided into several compressed air flows. The division takes place in such a way that either the compressed air streams run side by side or distributed in a circular manner into the interior of the tape guide channel. There is the advantage that the sliver is centered in connection with the severing, so that the security of separation is increased.

Blasen die Druckluftströme nebeneinander wird die Zentrierung des Bandes erreicht indem die äußeren Druckluftströme zeitlich etwas eher blasen als die innenliegenden Druckluftströme.If the compressed air flows blow next to each other, the belt is centered by blowing the outer compressed air flows somewhat earlier than the internal compressed air flows.

Um den Trennungsort in Abhänigkeit des Faserbandmaterials exakter festlegen zu können, sind die Druckluftströme in ihrer Höhe im Bezug auf die Öffnung des Bandführungskanals verstellbar und fixierbar. Mit Änderung der Stapellänge des Faserbandes bei Partiewechsel ist es somit mittels Höhneverstellung der Düsen möglich, den Abrißpunkt zu korrigieren, so daß das Faserband stets etwa eine Stapellänge unterhalb des Klemmpunktes der Bandabzugswalzen getrennt wird. Es ergibt sich der Vorteil, daß das geklemmte Band angespitzt wird. Das angespitzte Bandende erleichtert die Bandeinführung in dem Bandführungskanal bei Anlauf der Strecke.In order to be able to determine the separation location more precisely depending on the sliver material, the height of the compressed air streams can be adjusted and fixed in relation to the opening of the sliver guide channel. By changing the length of the sliver when changing batches, it is thus possible to correct the tear-off point by adjusting the height of the nozzles, so that the sliver is always separated approximately one staple length below the nip point of the sliver take-off rollers. There is the advantage that the clamped tape is sharpened. The pointed end of the band makes it easier to insert the band into the band guide channel at the start of the line.

Damit wird ein Mangel beseitigt, der bisher Vorbehalte gegenüber dem Trennort zwischen Kalanderwalzenpaar und Bandführungskanal stützte (vgl. DE-OS 15 10 428, S.2, 1. Absatz).This eliminates a defect that previously supported reservations about the separation location between the pair of calender rolls and the belt guide channel (cf. DE-OS 15 10 428, p. 2, 1st paragraph).

Ein weiteres Merkmal ist, daß das Faserband durch die Trennung eine definierte Länge erhält und am Kannenrand herabhängt.Another feature is that the sliver is given a defined length by the separation and hangs on the edge of the can.

Eine Düse unmittelbar an der Eintrittsöffnung des Bandführungskanals leitet einen Druckluftstrom in den Bandführungskanal hinein, so daß das Band sicher zerfasert wird und somit bricht.A nozzle directly at the inlet opening of the tape guide channel directs a stream of compressed air into the tape guide channel, so that the tape is reliably defibrated and thus breaks.

Der Luftstrom kann in mehrere Einzelströme aufgeteilt werden, die zeitlich versetzt in Betrieb gesetzt werden, so daß eine Zentrierung des Faserbandes im Bandführungskanal vor der Trennung erreicht wird.The air stream can be divided into several individual streams, which are put into operation at different times, so that the sliver is centered in the sliver guide channel before separation.

Die Aufgabe wird vorrichtungsgemäß durch die Merkmale des Anspruchs 12 gelöst.The object is achieved according to the device by the features of claim 12.

Vorrichtungsgemäß sind am Rand der Eintrittsöffnung des Bandführungskanals eine oder mehrere Düsen angeordnet. Die Blasrichtung ist ca. 45° zum Band geneigt und in die Eintrittsöffnung des Bandführungskanals gerichtet. Die Düsen sind nebeneinander oder kreisförmig verteilt mit Blasrichtung in den Bandführungskanal angeordnet. Eine einzelne Düse ist ebenso wie die nebeneinander angeordneten Düsen in einer Ebene über einen Winkelbereich von 90° (senkrecht bis parallel zum Band) schwenkbar gelagert. Vorrichtungsgemäß sind weiterhin die kreisförmig angeordneten Düsen vertikal zur Öffnung des Bandführungskanals in unterschiedlicher Höhe verstellbar. Die kreisförmigen Düsen sind auf einer Düsenplatte befestigt, die mit einer verstellbaren Kulisse verbunden ist. Die Düsenplatte ist in der Höhe gegenüber der Öffnung des Bandführungskanals veränderbar und fixierbar. Die Erfindung bringt den Vorteil, daß unabhängig vom Füllungszustand der Kanne die Zuverlässigkeit der pneumatischen Bandtrennung spürbar erhöht wurde.According to the device, one or more nozzles are arranged at the edge of the inlet opening of the tape guide channel. The blowing direction is inclined approx. 45 ° to the belt and directed into the inlet opening of the belt guide channel. The nozzles are arranged next to one another or in a circle with a blowing direction in the band guide channel. A single nozzle, like the nozzles arranged next to one another, is pivotably mounted in one plane over an angular range of 90 ° (perpendicular to parallel to the belt). According to the device, the circularly arranged nozzles can also be adjusted vertically to open the band guide channel at different heights. The circular nozzles are attached to a nozzle plate, which is connected to an adjustable backdrop. The height of the nozzle plate relative to the opening of the band guide channel can be changed and fixed. The invention has the advantage that the reliability of the pneumatic belt separation was noticeably increased, regardless of the filling status of the can.

Ein Ausführungsbeispiel der Erfindung ist nachstehend an Hand der

Figur 1:
Schema der Bandablieferung in eine Spinnkanne mit Düsenanordnung zum Bandtrennen
Figur 2:
Anordnung von 4 Düsen am Eintritt in den Bandführungskanal
Figur 3:
Ansicht kreisförmig angeordneter konvergenter Düsen
Figur 4:
kreisförmig angeordnete konvergente Düsen bei Querschnitt durch die Düsenplatte
Figur 5:
Anordnung einer ortsbeweglichen Düse
näher erläutert. Die Figur 1 zeigt den Einlauftrichter 2, die Abzugswalzen 3, den Drehteller 5 mit dem Bandführungskanal 4, den Fülltisch 8, die Kanne 10 mit Kannenpilz 9. Die Figur 1 zeigt weiterhin die Anordnung der Düse 6 an der Eintrittsöffnung des Bandführungskanals 4. Die Druckluft in die Düse wird über ein Ventil 7, das zwischen Vorratsbehälter für Druckluft und Düse in der Zuführleitung installiert ist, bereitgestellt. Figur 1 zeigt weiterhin, daß die Faserbandlieferung gestoppt wurde. Dadurch, daß die Kanne 10 unter dem Drehteller 5 verschoben wird in Abtransportrichtung, wird der Bandführungskanal frei für die Druckluftströmung. Mit Freiwerden der Mündung des Bandführungskanals von Faserbandlagen durch Verschieben der Kanne wird ein Signal zur Inbetriebnahme der Düse erzeugt. Das erfolgt vorteilhafterweise sobald die Mündung des Bandführungskanals frei ist.An embodiment of the invention is below using the
Figure 1:
Scheme of the sliver delivery into a spinning can with a nozzle arrangement for slitting
Figure 2:
Arrangement of 4 nozzles at the entrance to the belt guide channel
Figure 3:
View of circular convergent nozzles
Figure 4:
circular convergent nozzles with a cross section through the nozzle plate
Figure 5:
Arrangement of a portable nozzle
explained in more detail. 1 shows the inlet funnel 2, the take-off rollers 3, the turntable 5 with the belt guide channel 4, the filling table 8, the can 10 with the can mushroom 9. FIG. 1 also shows the arrangement of the nozzle 6 at the inlet opening of the belt guide channel 4. The compressed air is provided in the nozzle via a valve 7, which is installed between the reservoir for compressed air and the nozzle in the supply line. Figure 1 further shows that the sliver delivery has been stopped. Characterized in that the can 10 is moved under the turntable 5 in the removal direction, the tape guide channel is free for the flow of compressed air. When the opening of the sliver guide channel of sliver layers is cleared by moving the can, a signal for starting the nozzle is generated. This advantageously takes place as soon as the mouth of the tape guide channel is free.

Druckluft (etwa 6-8 bar), die unmittelbar an der Mündung etwa im Winkel von ca. 45° in den Bandführungskanal 4 hineingeleitet wird, erzeugt einen Sog, der das Band erfaßt und im oberen Drittel des Bandführungskanals 4 zerfasert.Compressed air (approx. 6-8 bar), which is led directly into the band guide channel 4 at the mouth at an angle of approximately 45 °, creates a suction that grips the band and frayed it in the upper third of the band guide channel 4.

Durch die Neigung des Druckluftstromes im Winkel von ca. 45° zum Band wird zugleich gewährleistet, daß die gesamte Druckluft in den Kanal kommt und an der Kanalunterseite (Mündung) austreten kann, wodurch das Band mit Sicherheit gebrochen wird. Das ist ein wesentliches Merkmal für eine sichere Bandtrennung, so daß das Verfahren auch bei unterschiedlichen Füllungszuständen der Kanne funktioniert.The inclination of the compressed air flow at an angle of approx. 45 ° to the belt also ensures that all compressed air enters the duct and exits at the bottom of the duct (mouth) can, which will certainly break the tape. This is an essential feature for a safe band separation, so that the method also works with different filling states of the can.

Entsprechend einem weiteren Merkmal kann die Druckluft in mehrere Druckluftströme aufgeteilt sein, die alle in die Eintrittsöffnung des Bandführungskanals gerichtet sind.According to a further feature, the compressed air can be divided into a plurality of compressed air flows, all of which are directed into the inlet opening of the band guide channel.

Figur 2 zeigt dazu eine Ausführungsform. 4 Düsen sind nebeneinander am Rand der Eintrittsöffnung des Bandführungskanals 4 angeordnet. Deren Blasrichtung ist parallel angeordnet. Alle 4 Düsen werden mit Druckluft betrieben. Die beiden äußeren Düsen 6.1 und 6.2 werden etwas eher mit Druckluft versorgt als die beiden mittleren (innen liegenden) Düsen 6.3 und 6.4. Es tritt dabei die Wirkung ein, daß die beiden äußeren Düsen 6.1 und 6.2 das Faserband 1 zentrieren und so das Faserband in die volle Blasrichtung der beiden mittleren Düsen 6.3 und 6.4 geführt wird, so daß die nachfolgend einsetzende Druckluft der beiden mittleren Düsen 6.3 und 6.4 das Faserband 1 mit Sicherheit trifft und zerfasert, so daß es bricht. Die Düsen werden somit zeitversetzt betrieben und es werden ca. drei Luftstöße ausgeführt, so daß durch die Luftstöße das Faserband getrennt und das untere Ende aus dem Bandführungskanal ausgestoßen wird, so daß es in definierter Länge am Kannenrand herunterhängt.Figure 2 shows an embodiment. 4 nozzles are arranged side by side on the edge of the inlet opening of the tape guide channel 4. Their blowing direction is arranged in parallel. All 4 nozzles are operated with compressed air. The two outer nozzles 6.1 and 6.2 are supplied with compressed air somewhat earlier than the two middle (inner) nozzles 6.3 and 6.4. This has the effect that the two outer nozzles 6.1 and 6.2 center the sliver 1 and thus the sliver is guided in the full blowing direction of the two middle nozzles 6.3 and 6.4, so that the compressed air of the two middle nozzles 6.3 and 6.4 which subsequently sets in the sliver 1 certainly hits and frayed so that it breaks. The nozzles are thus operated with a time delay and approximately three air blasts are carried out, so that the fiber sliver is separated by the air blasts and the lower end is ejected from the band guide channel, so that it hangs down at the can edge in a defined length.

Figur 3 zeigt eine Anordnung nach der mittels sechs kreisförmig um den Bandführungskanal 4 angeordneter konvergenter Düsen das Faserband getrennt wird. Jeweils drei Düsen 6.5, 6.6, 6.7 sind in einer Düsenplatte 11 angeordnet. Die gegenüberliegende Düsenplatte ist verdeckt. Figur 3 zeigt in der Seitenansicht eine dieser Düsenplatten 11.FIG. 3 shows an arrangement according to which the fiber band is separated by means of six convergent nozzles arranged in a circle around the band guide channel 4. In each case three nozzles 6.5, 6.6, 6.7 are arranged in a nozzle plate 11. The opposite nozzle plate is covered. FIG. 3 shows a side view of one of these nozzle plates 11.

Figur 4 zeigt die Anordnung der jeweils drei einzelnen Düsen auf der Düsenplatte 11. Es ist zu erkennen, daß die beiden Düsenplatten symmetrisch in einer Ebene liegen. Die Düsen 6.5 bis 6.10 sind in einer Höhe über der Öffnung des Bandführungskanals 4 angeordnet. Düse 6.6 und 6.9 liegen sich auf der gedachten Symmetrieachse der Düsenplatten 11 gegenüber. Gegenüber dieser jeweils mittig auf der Düsenplatte angeordneten Düsen befinden sich die beiden äußeren Düsen der Düsenplatte um je einen Winkel von 56° versetzt.Figure 4 shows the arrangement of the three individual nozzles on the nozzle plate 11. It can be seen that the two nozzle plates lie symmetrically in one plane. The nozzles 6.5 to 6.10 are arranged at a height above the opening of the band guide channel 4. Nozzles 6.6 and 6.9 lie opposite each other on the imaginary axis of symmetry of the nozzle plates 11. The two outer nozzles of the nozzle plate are each offset by an angle of 56 ° with respect to these nozzles, which are arranged centrally on the nozzle plate.

Die Düsen sind so in der Düsenplatte eingearbeitet, daß ihr Luftstrahl in einem spitzen Winkel auf das Faserband auftrifft. Die Versorgung mit Druckluft erfolgt über Rohrstutzen 14. Auf diesen Rohrstutzen 14 wird eine Schlauchzuleitung aufgesteckt, die die Druckluft zuführt. Wie Figur 3 weiter zeigt, wird die Düsenplatte 11 von einer Halterung 12 getragen, die mit einer verschiebbaren Kulisse 13 in Verbindung steht. Das trifft auch für die Düsenplatte der gegenüberliegenden Seite zu. Die Kulisse 13 ist vertikal verschiebbar, d.h. es ist ein Hub gegenüber dem Rand der Öffnung des Bandführungskanals 4 stufenlos einstellbar. Diese vertikale Verstellbarkeit der Düsenplatte 11 ermöglicht eine optimale Einstellung der Höhe der Düsen gegenüber den Öffnungsrand des Bandführungskanals. Die Einstellung hat unter dem folgenden Aspekt Bedeutung: Da das Band zwischen den Abzugswalzen geklemmt ist, wird es mit der erfindungsgemäßen Anordnung etwa eine Stapellänge unterhalb des Klemmpunktes der Abzugswalzen getrennt.The nozzles are incorporated in the nozzle plate so that their air jet hits the sliver at an acute angle. The supply of compressed air takes place via pipe socket 14. A hose feed line, which supplies the compressed air, is plugged onto this pipe socket 14. As FIG. 3 further shows, the nozzle plate 11 is carried by a holder 12 which is connected to a displaceable link 13. This also applies to the nozzle plate on the opposite side. The backdrop 13 is vertically displaceable, that is, a stroke relative to the edge of the opening of the tape guide channel 4 is continuously adjustable. This vertical adjustability of the nozzle plate 11 enables an optimal adjustment of the height of the nozzles relative to the opening edge of the tape guide channel. The setting is important from the following point of view: since the belt is clamped between the take-off rollers, it is separated with the arrangement according to the invention approximately one stack length below the clamping point of the take-off rollers.

Mit Änderung der Stapellänge des Faserbandes bei Partiewechsel ist es somit mittels Höhenverstellung der Düsen möglich, den Abrißpunkt so zu korrigieren, daß das Faserband etwa eine Stapellänge unterhalb des Klemmpunktes getrennt wird. Es ergibt sich dabei der Vorteil, daß das geklemmte Bandende angespitzt wird, so daß dieses Ende als Bandanfang bei erneutem Anlauf der Strecke leicht durch den Bandführungskanal 4 gefördert werden kann.When changing the length of the sliver when changing batches, it is thus possible to correct the tear-off point by adjusting the height of the nozzles so that the sliver is separated approximately one staple length below the clamping point. The advantage here is that the clamped end of the band is sharpened, so that this end can easily be conveyed through the band guide channel 4 as the beginning of the band when the line is started again.

Figur 5 zeigt eine weitere, mögliche Ausführung der Erfindung. Dargestellt ist eine Anordnung von zwei äußeren Düsen 6.11 und 6.12 und einer dazu mittig angeordneten, beweglichen Düse 6.13 (es können auch zwei solcher Düsen nebeneinander sein). Die Düsen werden zeitversetzt betrieben, d.h. die beiden äußeren Düsen 6.11 und 6.12 werden etwas eher mit Druckluft (über die Zuleitung 21) versorgt als die mittig angeordnete Düse 6.13 (über die Zuleitung 20). Die beiden äußeren Düsen zentrieren während des Blasens das Faserband. Einen kurzen Zeitraum später (einige Zehntel Sekunden) wird die mittlere Düse 6.13 mit Druckluft versorgt.
Die Düse 6.13 ist eine ortsbewegliche Düse. Aus einer Ausgangsposition ist die Düse 6.13 in ihrer axialen Richtung zum Faserband hin verschiebbar. Die Verschiebung wird möglich, wenn die Düse 6.13 mit Druckluft versorgt wird. Der bewegliche Körper 16 wird gegen die Ringfeder 17 gedrückt, so daß die Düse 6.13, als Verlängerung des beweglichen Körpers 16, in unmittelbare Nähe des Faserbandes 1 gedrückt und positioniert wird. Der bewegliche Körper 16 wird in einer Führung 15 geführt. Während des Heranführens der Düse 6.13 an das Faserband 1 bläst die Düse. Die Düse 6.13 trägt zusätzlich einen Bügel 18, um bei eventueller Berührung mit dem Faserband 1 dieses in der Gesamtheit zu erfassen und zu vermeiden, daß die Düse in das Faserband partiell eintaucht. Nach Beendigung der Druckluftzufuhr zur Düse 6.13 wird diese durch die Rückstellkraft der Ringfeder 17 in die Ausgangsposition zurückgestellt. Die Druckluftzufuhr zu allen Düsen ist beendet.Figure 5 shows a further possible embodiment of the invention. An arrangement of two outer nozzles 6.11 and 6.12 and a movable nozzle 6.13 arranged in the center is shown (two such nozzles can also be next to one another). The nozzles are operated with a time delay, ie the two outer nozzles 6.11 and 6.12 are supplied with compressed air somewhat more (via the feed line 21) than the centrally arranged nozzle 6.13 (via the feed line 20). The two outer nozzles center the sliver during blowing. A short time later (a few tenths of a second) the middle nozzle 6.13 is supplied with compressed air.
The nozzle 6.13 is a portable nozzle. From an initial position, the nozzle 6.13 can be displaced in its axial direction towards the sliver. The shift becomes possible when the nozzle 6.13 is supplied with compressed air. The movable body 16 is pressed against the ring spring 17 so that the nozzle 6.13, as an extension of the movable body 16, is pressed and positioned in the immediate vicinity of the sliver 1. The movable body 16 is guided in a guide 15. During the approach of the nozzle 6.13 to the sliver 1, the nozzle blows. The nozzle 6.13 additionally carries a bracket 18 in order to detect and avoid the whole of the sliver 1 if it comes into contact with it, that the nozzle is partially immersed in the sliver. After the compressed air supply to the nozzle 6.13 has ended, it is returned to the starting position by the restoring force of the ring spring 17. The compressed air supply to all nozzles has ended.

Diese Ausführung erhöht die Sicherheit der Bandtrennung durch die erzielbare Nähe zwischen Düse und Faserband, und es wird möglich, Druckluft mit geringerem Druck einzusetzen. Das reduziert die Betriebskosten.This design increases the safety of the belt separation by the proximity that can be achieved between the nozzle and the fiber belt, and it becomes possible to use compressed air at a lower pressure. This reduces the operating costs.

Claims (21)

  1. A method of separating a sliver delivered to a can on a drawing frame, in which filled cans are changed, in which a rotary plate with a sliver-guide channel is used for depositing the sliver in the can and the sliver is separated by compressed air, characterized in that the delivery of the sliver to the can is stopped, the opening of the sliver-guide channel (4) in the rotary plate (5) is cleared by displacement of the can (10) and a powerful compressed-air stream is now deflected into the inlet opening of the sliver-guide channel (4), so that the said compressed-air stream separates the sliver (1) inside the sliver-guide channel (4).
  2. A method according to Claim 1, characterized in that immediately after the can (10) has been displaced beyond the edge of the rotary plate (5) the compressed-air stream is guided into the inlet opening of the sliver-guide channel (4).
  3. A method according to Claim 2, characterized in that as the can (10) is moved further into the end position thereof by tensioning the sliver a slightly unravelled sliver is separated in the sliver-guide channel (4).
  4. A method according to Claim 1, characterized in that the compressed-air stream is divided into a plurality of compressed-air streams.
  5. A method according to Claim 4, characterized in that the compressed-air streams blow side-by-side from the edge of the inlet opening of the sliver-guide channel (4) into the interior of the sliver-guide channel (4).
  6. A method according to one of Claims 4 and 5, characterized in that the outer compressed-air streams blow slightly earlier so that the sliver (1) is centred in the sliver-guide channel (4) and the inner compressed-air streams which blow slightly later strike the sliver (1) in a reliable manner and unravel it in the interior of the sliver-guide channel (4), so that it breaks.
  7. A method according to Claim 4, characterized in that the compressed-air streams are guided distributed in a circular manner around the inlet opening of the sliver-guide channel (4) and as a result of their inclination towards the sliver (1) are guided into the interior of the sliver-guide channel (4) in a centred manner.
  8. A method according to one of Claims 5 to 7, characterized in that the compressed-air streams can be raised or lowered jointly or separately relative to the inlet opening of the sliver-guide channel (4) in order to be able to correct the break-off point in the sliver as a function of the staple length of the sliver (1) used.
  9. A method according to Claim 8, characterized in that the sliver (1) is separated substantially a staple length below the clamping point of the sliver draw-off rollers (3), in such a way that the end of the sliver remaining after the sliver draw-off rollers (3) is tapered.
  10. A method according to one of Claims 1 to 4, characterized in that the lower end of the sliver is ejected from the sliver-guide channel (4) by the compressed air and is suspended on the edge of the can (10).
  11. A method according to one of Claims 5 and 6, characterized in that a nozzle (6.13) blowing slightly later is a nozzle which is arranged centrally between outer nozzles (6.11 and 6.12) and which at the beginning of blowing is moved in the axial direction from its starting position towards the sliver and is returned to the starting position after it stops blowing.
  12. A device for separating a sliver (1) delivered to a can (10) on a drawing frame, in which filled cans (10) are changed and in which sliver draw-off rollers (3) and a rotary plate (5) with a sliver-guide channel (4) for depositing the sliver in the can (10) are provided, wherein the sliver draw-off rollers (3) have arranged downstream thereof at least one nozzle (6) which is used for separating the sliver by compressed air and which is arranged at the inlet opening of the sliver-guide channel (4) and the blowing direction of which is directed into the sliver-guide channel (4) and onto the sliver (1), characterized in that means for stopping the sliver delivery to the can (10), means for displacing the can (10) in order to clear the opening of the sliver-guide channel (4) in the rotary plate (5) and a plurality of nozzles (6.1 to 6.13) for separating the sliver (1) inside the sliver-guide channel (4) are provided.
  13. A device according to Claim 12, characterized in that the blowing direction of the nozzles (6.1 to 6.13) is directed at an angle of up to approximately 45° to the sliver (1) into the opening of the sliver-guide channel (4).
  14. A device according to one of Claims 12 and 13, characterized in that the nozzles (6.1 to 6.13) are mounted in a plane so as to be pivotable over an angle of 90°.
  15. A device according to one of Claims 12 and 13, characterized in that the nozzles (6.1, 6.2, 6.3, 6.4) are arranged side-by-side in such a way that their blowing directions point in a parallel manner into the opening of the sliver-guide channel (4).
  16. A device according to one of Claims 12 and 13, characterized in that convergent nozzles (6.5, 6.6, 6.7, 6.8, 6.9, 6.10) are arranged in a circular manner around the opening of the sliver-guide channel (4).
  17. A device according to Claim 16, characterized in that the nozzles (6.5 to 6.10) are arranged on a nozzle plate (11).
  18. A device according to Claim 17, characterized in that the nozzle plate (11) is secured to a retaining means (12) which is connected to a displaceable slide block (13).
  19. A device according to Claim 17, characterized in that the nozzle plate (11) can be altered and fixed vertically relative to the edge of the sliver-guide channel (4).
  20. A device according to Claim 12, characterized in that a nozzle (6.13) displaceable in the longitudinal direction towards the sliver is arranged centrally between two outer nozzles (6.11 and 6.12).
  21. A device according to Claim 20, characterized in that the displaceable nozzle (6.13) is connected to a movable body (16) mounted inside a guide (15) and held in the starting position by an annular spring (17).
EP93104391A 1992-06-17 1993-03-18 Method and device for separating a sliver delivered in a can on a drawing frame Expired - Lifetime EP0574659B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219845 1992-06-17
DE4219845A DE4219845A1 (en) 1992-06-17 1992-06-17 Method and device for separating a sliver

Publications (2)

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EP0574659A1 EP0574659A1 (en) 1993-12-22
EP0574659B1 true EP0574659B1 (en) 1995-06-21

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EP93104391A Expired - Lifetime EP0574659B1 (en) 1992-06-17 1993-03-18 Method and device for separating a sliver delivered in a can on a drawing frame

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EP (1) EP0574659B1 (en)
JP (1) JPH06294026A (en)
CZ (1) CZ105193A3 (en)
DE (2) DE4219845A1 (en)
ES (1) ES2075737T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5581849A (en) * 1994-05-13 1996-12-10 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for positioning a fiber sliver on a flat can
US5651165A (en) * 1993-07-24 1997-07-29 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for the deposit of a fiber sliver end on a flat can

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936703A1 (en) * 1999-08-04 2001-02-08 Truetzschler Gmbh & Co Kg Device for depositing the sliver on a sliver can, in particular a can with an elongated cross section
CN104593913B (en) * 2015-01-09 2017-08-25 经纬纺织机械股份有限公司 A kind of web suction nozzle and its combing machine of application
CN105297205B (en) * 2015-11-30 2017-12-12 沈阳宏大纺织机械有限责任公司 Automatic bar breaking apparatus of drawing frame and the broken strip method using the device
CN110304493A (en) * 2019-07-03 2019-10-08 安徽宏润工业设备安装有限公司 A kind of yarn take-up device
CN111893606B (en) * 2020-08-31 2021-07-20 安徽新虹纺织有限公司 Textile yarn breakage monitoring device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL269452A (en) * 1960-09-22
DE2947342A1 (en) * 1979-01-03 1980-07-17 Heberlein Hispano Sa DEVICE FOR SEPARATING A RIBBON

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651165A (en) * 1993-07-24 1997-07-29 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for the deposit of a fiber sliver end on a flat can
US5581849A (en) * 1994-05-13 1996-12-10 Rieter Ingolstadt Spinnereimaschinenbau Ag Process for positioning a fiber sliver on a flat can
US5647097A (en) * 1994-05-13 1997-07-15 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and device to sever the fiber sliver on a textile machine delivering a fiber sliver

Also Published As

Publication number Publication date
DE4219845A1 (en) 1993-12-23
CZ105193A3 (en) 1994-02-16
DE59300278D1 (en) 1995-07-27
JPH06294026A (en) 1994-10-21
EP0574659A1 (en) 1993-12-22
ES2075737T3 (en) 1995-10-01

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