EP0531740B1 - Method for cleaning a comb bar, especially a fix comb for preparatory textile machines, and comb bar for carrying out the method - Google Patents

Method for cleaning a comb bar, especially a fix comb for preparatory textile machines, and comb bar for carrying out the method Download PDF

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Publication number
EP0531740B1
EP0531740B1 EP92113854A EP92113854A EP0531740B1 EP 0531740 B1 EP0531740 B1 EP 0531740B1 EP 92113854 A EP92113854 A EP 92113854A EP 92113854 A EP92113854 A EP 92113854A EP 0531740 B1 EP0531740 B1 EP 0531740B1
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EP
European Patent Office
Prior art keywords
needle
needles
free passageways
needle bar
cover plates
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP92113854A
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German (de)
French (fr)
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EP0531740A1 (en
Inventor
Josef Egerer
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Staedtler and Uhl KG
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Staedtler and Uhl KG
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/28—Air draught or like pneumatic arrangements

Definitions

  • the invention is directed to a method for cleaning a pinstrip, in particular a fixed comb for textile preparation machines, comprising at least one row of needles fixed between two cover plates, the needle tips projecting beyond the inner edge of the cover plates by a certain amount, forming free passages between them whereby compressed air is passed through the free passages, and onto a pinstripe for carrying out the method.
  • the invention is based on the object, by a defined control of the direction of the air flow, taking advantage of the pressure or Suction devices to improve such a method so that not only reliable cleaning is achieved, but also the guidance of the sliver is optimized.
  • This object is achieved in that, depending on the working cycle of the machine in which the pinstripe is inserted, the free passages between the needles or the area in front of the needles are alternately pressurized or underpressured.
  • the pinstrip is designed as a fixed comb, which is arranged downstream of a pliers arrangement, a vacuum is applied in the phase of closing the pliers arrangement until the closed state is reached in order to hold the fibers on the fixed comb, and only after After closing the pliers, compressed air is applied for cleaning.
  • the negative pressure holds the fibers drawn out of the pliers by the draw-off rollers in the spaces between the needles in the direct draw-off line. This prevents the fibers from going the easier way after the fleece in the pliers is released and from being pulled uncleaned away under the tips of the fixed comb into the take-off rollers. Due to the negative pressure or the suction flow, the rear ends of the fibers that have left the pliers can be raised during the tearing off. These then no longer sag downwards. Accordingly, it is ensured that combing takes place through the fixed comb.
  • the existing air ducts are also used to improve the fiber guidance through the fixed comb. Furthermore, the alternating application of negative and positive pressure and the resulting changing direction of the air flow through the fixed comb means that the settling of contaminants is largely prevented.
  • the needles 1 and 2 which is used as a fixed comb, comprises a series of needles 1, which are arranged between a first cover plate 2 and a second cover plate 3.
  • the needles 1 can be connected to one another by gluing or soldering.
  • the cover plates 2 and 3 are provided in particular when the needles 1 are glued.
  • a tip region 4 is formed by embossing the needles 1 starting from a point 5, reducing their original thickness.
  • the remaining section is referred to as shaft 6.
  • the shaft region 7 is largely covered by the cover plates 2, 3.
  • the length of the protruding needle tips 4 is referred to as the board V.
  • the first cover plate 2 is shorter than the second cover plate 3 in the direction of the longitudinal axis 9 of the needle, by an amount that is larger as an additional embossing section 10 of the needles 1, which has the length X.
  • This additional embossing section 10 creates air channels 11 between the needles 1, which extend from below the inner edge 12 of the first, shorter cover plate 2 to the inner edge 13 of the second longer cover plate 3 and open into the free passage F between two adjacent needles 1.
  • the needles 1 in this area have a reduced width B compared to a width A in the area of the shaft 7.
  • the fixed comb 14 shown in FIG. 3 has, for example, air guide chambers 15 and 16.
  • the fixed comb 14 is arranged in the transport direction (arrow 17) of the sliver 18 of a pair of pliers 19, which consists of upper pliers 20 and lower pliers 21 with a drive, not shown in detail.
  • the pliers arrangement 19 opens and closes in cycles depending on the circulation of a combing segment 22 of a comb roller 23, which is only indicated in its periphery, such that when the combing segment 22 passes, the sliver 18 is held between the upper pliers 20 and the lower pliers 21, so that the fibers can be combed, and that the pliers arrangement 19 opens in the subsequent phase, so that the combed section of the sliver can be drawn off by two take-off rollers 24 arranged in the transport direction (arrow 17).
  • FIGS. 4 to 6 show how a pinstrip can be designed to be particularly advantageous for carrying out the method according to the invention.
  • a pinstripe consists of a plurality of needle-like stamped parts 26 with a tip 27 and a foot 28.
  • the foot 28 has a lateral extension 29 below the tip area, so that the entire needle-like stamped part 26 becomes asymmetrical.
  • the approach 29 can have approximately the width of the needle foot 28.
  • Fig. 4 two such stamped parts 26 are rotated 180 ° against each other. These punched parts 26 can be lined up by pushing them together in the direction of the arrows 30, as shown in FIG. 5, that is to say that the needle tips 27 lie congruently one behind the other, whereas the lugs 29, viewed in the direction of the lined-up needle strip 31, alternate to the left one after the other or protrude to the right, as can be seen in the sectional view according to FIG. 6.
  • air ducts 34 which are located in the region of the upper end edges, are formed between two successive projections 29, each projecting to the same side, the intermediate die-cut base body of the die-cut part 26 extending in the other direction and the respective cover plate 32 or 33 35 of the approaches 29, that is to say in the area of the tips 27, and overall form a relatively large cross-section for the application of a negative or positive pressure, so that the pressure conditions in the tip area and, accordingly, the strength and direction of the very effectively and with the required power prevailing air flow can be adjusted.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

In a method for cleaning the needle bar, in particular a top comb for textile machinery, comprising at least one row of needles or needle-like stamped elements, which are held between two cover plates, whereby the needle tips protrude, while forming free passageways, by a certain amount between those free passageways beyond the lower edge of the cover plates, and whereby compressed air is guided through the free passageways, it is provided, in order to attain an optimum guidance of the fiber band and a complete combing, that depending on the working cycle of the machine, into which the needle bar is inserted, the free passageways between the needles, respectively the region before the needles are alternately activated with overpressure or underpressure. A needle strip according to the invention which is particularly suitable for putting the method into practice, is formed of needle-like stamped elements, which comprise asymetrical lateral projections, and which are lined up in such manner that the projections are directed towards the one or the other side in alternating manner, so that air channels are formed between the projections.

Description

Die Erfindung richtet sich auf ein Verfahren zum Reinigen eines Nadelstreifens, insbesondere eines Fixkamms für Textilvorbereitungsmaschinen, umfassend wenigstens eine Reihe von zwischen zwei Deckblechen festgelegten Nadeln, wobei die Nadelspitzen um einen gewissen Betrag unter Ausbildung freier Durchgänge zwischen denselben über die Innenkante der Deckbleche vorstehen, und wobei durch die freien Durchgänge Druckluft geleitet wird, sowie auf einen Nadelstreifen zur Durchführung des Verfahrens.The invention is directed to a method for cleaning a pinstrip, in particular a fixed comb for textile preparation machines, comprising at least one row of needles fixed between two cover plates, the needle tips projecting beyond the inner edge of the cover plates by a certain amount, forming free passages between them whereby compressed air is passed through the free passages, and onto a pinstripe for carrying out the method.

Ein derartiges Verfahren und ein entsprechender Nadelstreifen sind aus der DE-PS 37 22 481 bekannt. Dort wird auch bereits ausgeführt, daß es zur Erzeugung eines reinigenden Luftstromes möglich ist, mit Überdruck oder Unterdruck zu arbeiten. Die in der gattungsbildenden Patentschrift beschriebenen Maßnahmen zielen ausschließlich darauf ab, die zuvor durchgeführte mechanische Reinigung des Putzkammes z. B. durch Putzklingen, wie sie etwa aus der DE 29 42 588 A1 bekannt sind, durch eine die Nadeln mechanisch schonende, auch bei beengten räumlichen Verhältnissen realisierbare Reinigung mittels eines Luftstromes zu ersetzen.Such a method and a corresponding pinstripe are known from DE-PS 37 22 481. There it is already stated that it is possible to work with overpressure or underpressure in order to generate a cleaning airflow. The measures described in the generic patent specification are aimed exclusively at the mechanical cleaning of the cleaning comb previously carried out z. B. by cleaning blades, such as are known from DE 29 42 588 A1, to replace the needles mechanically gentle, which can be realized even in confined spaces by means of an air stream.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, durch eine definierte Steuerung der Richtung des Luftstromes unter Ausnutzung der für die Erzeugung des Luftstromes ohnehin vorhandenen Druck- bzw. Saugeinrichtungen ein derartiges Verfahren so zu verbessern, daß nicht nur eine zuverlässige Reinigung erreicht, sondern auch die Führung des Faserbandes optimiert wird.Proceeding from this, the invention is based on the object, by a defined control of the direction of the air flow, taking advantage of the pressure or Suction devices to improve such a method so that not only reliable cleaning is achieved, but also the guidance of the sliver is optimized.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in Abhängigkeit von dem Arbeitszyklus der Maschine, in die der Nadelstreifen eingesetzt ist, die freien Durchgänge zwischen den Nadeln bzw. der Bereich vor den Nadeln wechselweise mit Überdruck bzw. Unterdruck beaufschlagt werden.This object is achieved in that, depending on the working cycle of the machine in which the pinstripe is inserted, the free passages between the needles or the area in front of the needles are alternately pressurized or underpressured.

Insbesondere ist mit Vorteil vorgesehen, daß bei Ausbildung des Nadelstreifens als Fixkamm, der einer Zangenanordnung nachgeordnet ist, in der Phase des Schließens der Zangenanordnung bis zum Erreichen des geschlossenen Zustandes ein Unterdruck angelegt wird, um die Fasern am Fixkamm zu halten, und daß erst nach dem Schließen der Zange Druckluft zum Reinigen angelegt wird.In particular, it is advantageously provided that when the pinstrip is designed as a fixed comb, which is arranged downstream of a pliers arrangement, a vacuum is applied in the phase of closing the pliers arrangement until the closed state is reached in order to hold the fibers on the fixed comb, and only after After closing the pliers, compressed air is applied for cleaning.

Der Unterdruck hält die durch die Abzugswalzen aus der Zange abgezogenen Fasern in den Zwischenräumen der Nadeln in der direkten Abzugslinie fest. Damit wird verhindert, daß die Fasern nach dem Freiwerden des in der Zange befindlichen Vlieses den leichteren Weg gehen und ungesäubert unter den Spitzen des Fixkamms weg in die Abzugswalzen gezogen werden. Aufgrund des Unterdrucks bzw. der Saug-Strömung können also während des Abreißens die Hinterenden der Fasern angehoben werden, welche die Zange verlassen haben. Diese hängen dann nicht mehr nach unten durch. Dementsprechend ist sichergestellt, daß ein Kämmen durch den Fixkamm erfolgt.The negative pressure holds the fibers drawn out of the pliers by the draw-off rollers in the spaces between the needles in the direct draw-off line. This prevents the fibers from going the easier way after the fleece in the pliers is released and from being pulled uncleaned away under the tips of the fixed comb into the take-off rollers. Due to the negative pressure or the suction flow, the rear ends of the fibers that have left the pliers can be raised during the tearing off. These then no longer sag downwards. Accordingly, it is ensured that combing takes place through the fixed comb.

Erfindungsgemäß werden also die vorhandenen Luftkanäle auch dazu ausgenutzt, die Faserführung durch den Fixkamm zu verbessern. Weiterhin wird durch das alternierende Anlegen von Unter- und Überdruck und durch die hierdurch bedingte wechselnde Richtung des Luftstromes durch den Fixkamm erreicht, daß das Absetzen von Verunreinigungen weitgehend verhindert wird.According to the invention, the existing air ducts are also used to improve the fiber guidance through the fixed comb. Furthermore, the alternating application of negative and positive pressure and the resulting changing direction of the air flow through the fixed comb means that the settling of contaminants is largely prevented.

Nachfolgend wird die Erfindung anhand eines bevorzugten Ausführungsbeispieles in Verbindung mit der Zeichnung näher erläutert. Dabei zeigen

Fig. 1
einen Querschnitt parallel zur Längsrichtung der Nadeln durch einen Nadelstreifen, mit welchem das erfindungsgemäße Verfahren ausgeführt werden kann,
Fig. 2
eine teilweise aufgebrochene Seitenansicht auf einen Nadelstreifen nach Fig. 1,
Fig. 3
einen Schnitt zur Veranschaulichung der Anordnung eines Fixkamms mit einer alternativen Ausgestaltung der Luftführung an einer Baumwoll-Kämm-Maschine,
Fig. 4
zwei nadelartige Stanzteile zur Ausbildung eines erfindungsgemäßen Nadelstreifens,
Fig. 5
eine Ansicht der Stanzteile nach Fig. 4 im aufgereihten Zustand und
Fig. 6
einen Schnitt durch einen aus in Fig. 4 und 5 dargestellten Stanzteilen gebildeten erfindungsgemäßen Nadelstreifen.
The invention is described below on the basis of a preferred exemplary embodiment explained in connection with the drawing. Show
Fig. 1
3 shows a cross section parallel to the longitudinal direction of the needles through a pinstripe with which the method according to the invention can be carried out,
Fig. 2
2 shows a partially broken side view of a pinstripe according to FIG. 1,
Fig. 3
1 shows a section to illustrate the arrangement of a fixed comb with an alternative embodiment of the air duct on a cotton combing machine,
Fig. 4
two needle-like stamped parts for forming a pinstripe according to the invention,
Fig. 5
a view of the stamped parts of FIG. 4 in the lined up state and
Fig. 6
a section through a pinstripe according to the invention formed from punched parts shown in FIGS. 4 and 5.

Ein in Figur 1 und 2 dargestellter Nadelstreifen, der als Fixkamm eingesetzt wird, umfaßt eine Reihe von Nadeln 1, welche zwischen einem ersten Deckblech 2 und einem zweiten Deckblech 3 angeordnet sind. Die Nadeln 1 können untereinander durch Verklebung oder Verlötung verbunden sein. Die Deckbleche 2 und 3 sind insbesondere bei einer Verklebung der Nadeln 1 vorgesehen.1 and 2, which is used as a fixed comb, comprises a series of needles 1, which are arranged between a first cover plate 2 and a second cover plate 3. The needles 1 can be connected to one another by gluing or soldering. The cover plates 2 and 3 are provided in particular when the needles 1 are glued.

Ein Spitzenbereich 4 wird dadurch ausgebildet, daß ausgehend von einem Punkt 5 die Nadeln 1 unter Reduktion ihrer ursprünglichen Dicke geprägt werden. Der verbleibende Abschnitt wird als Schaft 6 bezeichnet. Der Schaftbereich 7 ist bei herkömmlichen Nadelkämmen durch die Deckbleche 2, 3 weitgehend abgedeckt.A tip region 4 is formed by embossing the needles 1 starting from a point 5, reducing their original thickness. The remaining section is referred to as shaft 6. In conventional needle combs, the shaft region 7 is largely covered by the cover plates 2, 3.

Zwischen den Nadeln 1 bestehen freie Durchgänge F, welche durch das Verhältnis der Dicken des geprägten Spitzenbereiches 4 und des unverformten Schaftes 6 bestimmt werden. Die Breite des Schaftes 6 gibt vor, wie viele Nadeln 1 pro Längeneinheit des Nadelstreifens vorgesehen sind, da die Schäfte 6 dicht an dicht aneinander liegen.There are free passages F between the needles 1, which are determined by the ratio of the thicknesses of the embossed tip region 4 and the undeformed shaft 6. The width of the shaft 6 specifies how many needles 1 are provided per unit length of the pinstrip, since the shafts 6 lie close together.

Die Länge der überstehenden Nadelspitzen 4 wird als Vorstand V bezeichnet.The length of the protruding needle tips 4 is referred to as the board V.

Bei einer gattungsgemäßen, an sich aus der DE 37 22 481 B1 bekannten Ausgestaltung eines solchen Nadelstreifens ist vorgesehen, daß das erste Deckblech 2 gegenüber dem zweiten Deckblech 3 in Richtung der Nadellängsachse 9 gesehen kürzer ausgeführt ist, und zwar um einen Betrag, der größer ist als ein zusätzlicher Prägungsabschnitt 10 der Nadeln 1, der die Länge X aufweist. Durch diesen zusätzlichen Prägungsabschnitt 10 entstehen zwischen den Nadeln 1 Luftkanäle 11, welche sich ab unterhalb der Innenkante 12 des ersten, kürzeren Deckbleches 2 bis zur Innenkante 13 des zweiten längeren Deckbleches 3 erstrecken und in den freien Durchgang F zwischen je zwei benachbarten Nadeln 1 münden.In a generic embodiment of such a pinstrip known from DE 37 22 481 B1, it is provided that the first cover plate 2 is shorter than the second cover plate 3 in the direction of the longitudinal axis 9 of the needle, by an amount that is larger as an additional embossing section 10 of the needles 1, which has the length X. This additional embossing section 10 creates air channels 11 between the needles 1, which extend from below the inner edge 12 of the first, shorter cover plate 2 to the inner edge 13 of the second longer cover plate 3 and open into the free passage F between two adjacent needles 1.

Aufgrund der Prägungen 10 weisen die Nadeln 1 in diesem Bereich eine reduzierte Breite B gegenüber einer Breite A im Bereich des Schaftes 7 auf.Due to the embossing 10, the needles 1 in this area have a reduced width B compared to a width A in the area of the shaft 7.

Zum Zuführen der Druckluft sind in der DE 37 22 481 B1 verschiedene Möglichkeiten beschrieben. In gleicher Weise kann über die dementsprechend vorgesehenen Kanäle auch ein Unterdruck angelegt werden. Der in Figur 3 dargestellte Fixkamm 14 weist beispielsweise Luftführungskammern 15 und 16 auf.DE 37 22 481 B1 describes various possibilities for supplying the compressed air. In the same way, a vacuum can also be applied via the channels provided accordingly. The fixed comb 14 shown in FIG. 3 has, for example, air guide chambers 15 and 16.

Der Fixkamm 14 ist in Transportrichtung (Pfeil 17) des Faserbandes 18 einer Zangenanordnung 19, die aus einer Oberzange 20 und einer Unterzange 21 mit einem im einzelnen nicht dargestellten Antrieb besteht, nachgeordnet. Die Zangenanordnung 19 öffnet und schließt sich taktweise in Abhängigkeit von dem Umlauf eines Kämmsegments 22 einer in ihrer Peripherie nur angedeuteten Kämmwalze 23 derart, daß beim Passieren des Kämmsegments 22 das Faserband 18 zwischen der Oberzange 20 und der Unterzange 21 festgehalten wird, so daß die Fasern gekämmt werden können, und daß die Zangenanordnung 19 in der daran anschließenden Phase sich öffnet, so daß der gekämmte Abschnitt des Faserbandes durch zwei in Transportrichtung (Pfeil 17) nachgeordnete Abzugswalzen 24 abgezogen werden kann.The fixed comb 14 is arranged in the transport direction (arrow 17) of the sliver 18 of a pair of pliers 19, which consists of upper pliers 20 and lower pliers 21 with a drive, not shown in detail. The pliers arrangement 19 opens and closes in cycles depending on the circulation of a combing segment 22 of a comb roller 23, which is only indicated in its periphery, such that when the combing segment 22 passes, the sliver 18 is held between the upper pliers 20 and the lower pliers 21, so that the fibers can be combed, and that the pliers arrangement 19 opens in the subsequent phase, so that the combed section of the sliver can be drawn off by two take-off rollers 24 arranged in the transport direction (arrow 17).

Zeitlich koordiniert mit dem Öffnen und Schließen der Zangenanordnung 19 wird über die Luftkammern 15, 16 Druckluft angelegt, welche in Richtung des Pfeils 25 austritt und Verunreinigungen vom Bereich des Nadelvorstandes V wegbläst bzw. es wird ein Unterdruck angelegt, der einen Luftstrom in entgegengesetzter Richtung zum Pfeil 25 erzeugt, durch welchen die Fasern des Faserbandes 18 in den Bereich des Nadelvorstandes V des Fixkammes 14 geführt werden. Der Überdruck wird also dann angelegt, wenn die Zangenanordnung 19 geschlossen ist, um die bei dem vorhergehenden Kämmvorgang am Fixkamm 16 verbliebenen Verunreinigungen zu entfernen.Coordinated in time with the opening and closing of the pliers assembly 19, compressed air is applied via the air chambers 15, 16, which emerges in the direction of the arrow 25 and blows contaminants away from the area of the needle board V, or a negative pressure is applied which causes an air flow in the opposite direction to Arrow 25 generates, through which the fibers of the sliver 18 are guided into the area of the needle board V of the fixed comb 14. The excess pressure is then applied when the pliers arrangement 19 is closed in order to remove the impurities remaining on the fixed comb 16 in the previous combing process.

In den Figuren 4 bis 6 ist dargestellt, wie ein Nadelstreifen zur Durchführung des erfindungsgemäßen Verfahrens besonders vorteilhaft ausgebildet werden kann. Ein derartiger Nadelstreifen besteht aus einer Mehrzahl von nadelartigen Stanzteilen 26 mit einer Spitze 27 und einem Fuß 28. Der Fuß 28 weist unterhalb des Spitzenbereiches einen seitlichen Ansatz 29 auf, so daß das gesamte nadelartige Stanzteil 26 asymetrisch wird. Der Ansatz 29 kann etwa die Breite des Nadelfußes 28 aufweisen.FIGS. 4 to 6 show how a pinstrip can be designed to be particularly advantageous for carrying out the method according to the invention. Such a pinstripe consists of a plurality of needle-like stamped parts 26 with a tip 27 and a foot 28. The foot 28 has a lateral extension 29 below the tip area, so that the entire needle-like stamped part 26 becomes asymmetrical. The approach 29 can have approximately the width of the needle foot 28.

In Fig. 4 sind zwei derartige Stanzteile 26 180° gegeneinander verdreht. Diese Stanzteile 26 lassen sich durch Zusammenschieben in Richtung der Pfeile 30 so aneinander reihen, wie dies in Figur 5 dargestellt ist, d. h. daß die Nadelspitzen 27 deckungsgleich hintereinander zu liegen kommen, wohingegen die Ansätze 29 in Richtung des aufgereihten Nadelstreifens 31 gesehen nacheinander abwechselnd nach links oder nach rechts vorstehen, wie dies in der Schnittdarstellung gemäß Fig. 6 erkennbar ist. Hierdurch werden zwischen je zwei aufeinander folgenden, jeweils zur gleichen Seite hinausstehenden Ansätzen 29, dem jeweils dazwischen liegenden Stanzteil-Grundkörper des sich in die andere Richtung erstreckenden Stanzteils 26 und dem jeweiligen Deckblech 32 bzw. 33 Luftführungskanäle 34 ausgebildet, welche im Bereich der oberen Stirnkanten 35 der Ansätze 29, d. h. also im Bereich der Spitzen 27 münden und insgesamt einen relativ großen Querschnitt für das Anlegen eines Unter- oder Überdrucks ausbilden, so daß sehr effektiv und mit der erforderlichen Leistung die Druckverhältnisse im Spitzenbereich und dementsprechend die Stärke und die Richtung des dort herrschenden Luftstromes eingestellt werden können.In Fig. 4, two such stamped parts 26 are rotated 180 ° against each other. These punched parts 26 can be lined up by pushing them together in the direction of the arrows 30, as shown in FIG. 5, that is to say that the needle tips 27 lie congruently one behind the other, whereas the lugs 29, viewed in the direction of the lined-up needle strip 31, alternate to the left one after the other or protrude to the right, as can be seen in the sectional view according to FIG. 6. As a result, air ducts 34, which are located in the region of the upper end edges, are formed between two successive projections 29, each projecting to the same side, the intermediate die-cut base body of the die-cut part 26 extending in the other direction and the respective cover plate 32 or 33 35 of the approaches 29, that is to say in the area of the tips 27, and overall form a relatively large cross-section for the application of a negative or positive pressure, so that the pressure conditions in the tip area and, accordingly, the strength and direction of the very effectively and with the required power prevailing air flow can be adjusted.

Claims (4)

  1. Method for cleaning a needle bar, in particular a top comb for textile machinery, comprising at least one row of needles (21) or needle-like stamped elements, which are held between two cover plates, wherein the needle tips (4) protrude, while forming free passageways (11), by a certain amount between those free passageways beyond the lower edge of the cover plates (2, 3), and whereby compressed air is guided through the free passageways (11), characterized in that depending on the working cycle of the machine, into which the needle bar is inserted, the free passageways (11) between the needles, respectively the region in front of the needles are alternately activated with overpressure or underpressure.
  2. Method according to claim 1, characterized in that in case the needle bar is embodied as a top comb, which is arranged behind a nippers assembly, an underpressure is applied in the phase of closing the nippers assembly until the closed condition is achieved, in order to hold the fibers at the top comb, and in that only after closure of the nippers compressed air is applied for cleaning.
  3. Needle bar for putting the method into practice according to one of claims 1 to 2, comprising at least one row of needles (21) or needle-like stamped elements, which are held between two cover plates, wherein the needle tips (4) protrude, while forming free passageways (11), by a certain amount between those free passageways beyond the lower edge of the cover plates (2, 3), and whereby compressed air is guided through the free passageways (11), characterized in that the needle bar comprises a plurality of needle-like stamped elements (26), which comprise in each case a lateral projection (29) in the foot region, the stamped elements 26 being lined up in such manner, that the tips (27) of the stamped elements (26) are in congruence and that the projections (29) protrude to the one or the other side in alternating manner, so that air channels (34) are formed between the projections (29) adjacent on the same side respectively, wherein depending on the working cycle of the machine, into which the needle bar is inserted, the free passageways between the needles, respectively the region in front of the needles can alternately be activated with overpressure or underpressure.
  4. Needle-like stamped element for forming a needle bar according to claim 3, characterized in that this element is formed asymmetrical in such manner that it comprises a lateral projection (29) in the foot region.
EP92113854A 1991-09-13 1992-08-14 Method for cleaning a comb bar, especially a fix comb for preparatory textile machines, and comb bar for carrying out the method Expired - Lifetime EP0531740B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4130496 1991-09-13
DE4130496A DE4130496A1 (en) 1991-09-13 1991-09-13 METHOD FOR CLEANING A NEEDLE STRIP, IN PARTICULAR A FIXING COMB FOR TEXTILE PREPARATION MACHINES, AND NEEDLE STRIP FOR CARRYING OUT THE METHOD

Publications (2)

Publication Number Publication Date
EP0531740A1 EP0531740A1 (en) 1993-03-17
EP0531740B1 true EP0531740B1 (en) 1995-03-29

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US (1) US5228173A (en)
EP (1) EP0531740B1 (en)
JP (1) JP2579722B2 (en)
AT (1) ATE120501T1 (en)
CA (1) CA2076355A1 (en)
CZ (1) CZ282892B6 (en)
DE (2) DE4130496A1 (en)
ES (1) ES2070564T3 (en)
MX (1) MX9205190A (en)
SK (1) SK262792A3 (en)
TW (1) TW204378B (en)

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DE10033169B4 (en) * 1999-07-24 2016-12-22 Maschinenfabrik Rieter Ag Fix comb of a combing machine

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CH686627A5 (en) * 1993-03-29 1996-05-15 Rieter Ag Maschf Nipper unit for a comma Schine.
EP0633333B1 (en) * 1993-07-06 1998-04-01 Maschinenfabrik Rieter Ag Control arrangement for controlled blowing out a rectilinear comb
DE19721163A1 (en) * 1997-05-21 1998-11-26 Rieter Ag Maschf Combing machine
DE19951126A1 (en) * 1999-10-23 2001-04-26 Staedtler & Uhl Fixed comb for sliver materials has the free projection of the needles at a set angle to the sliver movement plane for easy penetration through the comb needles with effective retention of debris
DE19956911A1 (en) * 1999-11-26 2001-05-31 Staedtler & Uhl Clothing for a textile carding/combing machine has structured needles or sawteeth with free passage zones between them which do not become clogged for an improved cleaning and combing action
DE20003070U1 (en) * 2000-02-19 2000-04-20 Staedtler & Uhl, 91126 Schwabach Fixed comb for a combing machine
CN105803586B (en) * 2016-05-16 2018-03-13 浙江红太阳毛纺织有限公司 Combing machine jaw Special cleaning tool
CN109385701A (en) * 2018-12-10 2019-02-26 恒天重工股份有限公司 A kind of exhaust needle plate suitable for Exploration for Air Pressure Hopper of Cotton Feeder
CN110230131B (en) * 2019-05-29 2020-10-30 义乌市拾町服饰有限公司 Automatic cleaning device for internal parts of combing machine
CN114435665B (en) * 2021-12-31 2024-03-12 山东宏业纺织股份有限公司 Integrative processingequipment of comb and parallel cotton fibers prior to spinning packing

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US2977642A (en) * 1958-04-28 1961-04-04 Saco Lowell Shops Textile combing machines
JPS5112494U (en) * 1974-07-04 1976-01-29
IT7967916A0 (en) * 1979-05-02 1979-05-02 Sant Andrea Novara Officine CLEANING DEVICE FOR THE STRAIGHT COMB OF TEXTILE FIBER COMBING MACHINES
DD233280A3 (en) * 1983-08-05 1986-02-26 Scholz Hans Joachim DEVICE FOR CLEANING A TEARING ZONE OF FLAT MACHINE
US4928356A (en) * 1987-07-08 1990-05-29 Staedtler & Uhl Top comb for textile machinery and process for cleaning same
JPH0247313A (en) * 1988-08-08 1990-02-16 Staedtler & Uhl Band-shaped needle, particularly top comb for use in a machine for prearrangement of fabric or the like and method for its cleaning
CH675886A5 (en) * 1988-11-23 1990-11-15 Rieter Ag Maschf
DE3937899C1 (en) * 1989-11-15 1991-01-10 Staedtler & Uhl, 8540 Schwabach, De
CH680928A5 (en) * 1990-02-26 1992-12-15 Rieter Ag Maschf

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10033169B4 (en) * 1999-07-24 2016-12-22 Maschinenfabrik Rieter Ag Fix comb of a combing machine

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TW204378B (en) 1993-04-21
DE59201769D1 (en) 1995-05-04
SK262792A3 (en) 1995-05-10
CA2076355A1 (en) 1993-03-14
MX9205190A (en) 1993-03-01
JPH05214616A (en) 1993-08-24
ATE120501T1 (en) 1995-04-15
CZ282892B6 (en) 1997-11-12
CZ262792A3 (en) 1994-02-16
DE4130496A1 (en) 1993-03-18
ES2070564T3 (en) 1995-06-01
US5228173A (en) 1993-07-20
EP0531740A1 (en) 1993-03-17
JP2579722B2 (en) 1997-02-12

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