EP0775767A1 - Method for the selective removal of foreign matter from opening or doffer cylinder of a textile machine - Google Patents

Method for the selective removal of foreign matter from opening or doffer cylinder of a textile machine Download PDF

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Publication number
EP0775767A1
EP0775767A1 EP96117801A EP96117801A EP0775767A1 EP 0775767 A1 EP0775767 A1 EP 0775767A1 EP 96117801 A EP96117801 A EP 96117801A EP 96117801 A EP96117801 A EP 96117801A EP 0775767 A1 EP0775767 A1 EP 0775767A1
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EP
European Patent Office
Prior art keywords
air
knife
roller
jam
guide plate
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EP96117801A
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German (de)
French (fr)
Inventor
Hubert Dipl. Ing.-Dipl. Wirt. Ing. Hergeth
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Individual
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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
    • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
    • D01G9/14—Details of machines or apparatus
    • D01G9/20—Framework; Casings; Coverings; Grids
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/003—Detection and removal of impurities

Definitions

  • the application D-19518783.0 contains a system for the detection of foreign fibers on an opening machine.
  • the foreign parts are detected by sensors that control an opening roller parallel to the axis. If foreign parts are detected by the sensors and the evaluation electronics, a flap downstream of the opening machine is automatically activated and the foreign parts are removed with good fibers.
  • the disadvantage here is that relatively many good fibers are removed with the foreign parts.
  • An OPTiSCAN machine which is described in DE - 43 30 173, has found widespread use in the textile industry. In particular, because fibers are only removed at the points across the width at which foreign parts are detected.
  • the object of the invention is to provide a simple and very fast-reacting discharge device which also allows the foreign parts to be selectively separated out on an opening roller.
  • the separation takes place in zones arranged parallel to the axis of the roller. These zones correspond to detection areas which, seen in the flow of material, are upstream of these zones. If a foreign part that is transported by the opening roller on the circumference of the roller is detected in one of the detection zones, a signal for discharge is sent to the corresponding zone.
  • the corresponding discharge segment can be located a little later in the material passage on the same opening roller, or on an opening roller that takes over the fibers directly from the opening roller, or via one or more intermediate rollers, the fiber material takes over from the opening roller, where the fibers are checked.
  • the discharge takes place by creating an air jam in front of a knock-out knife or a separating edge. To explain the process, the air conditions on an opening roller are described in a simplified manner.
  • the opening roller is provided with driver tips on the circumference. These tips pull the fibers with them. With the opening roller, an air film rotates on the surface. One or more “knives” are attached at a short distance from the surface for mechanical removal of impurities. Large parts cannot pass between the knife and the roller surface and are excreted at the knife edge. Also small parts that are in the periphery of the air film rotating with the roller are separated out. In order to keep the air film and thus the fibers on the opening roller, however, it is necessary to guide the air film on the roller surface through guide plates. The distance between the baffle and the opening roller, at the point where the baffle ends before the next knife, determines how thick the air film around the roller is before the next knife.
  • Fig. 1 shows the operation of a cleaning machine for cotton.
  • Fiber material reaches an opening roller 2) via feed roller 1).
  • the material is guided past knives 3) through the opening roller.
  • baffles 4) are provided to keep the co-rotating air screen on the drum.
  • a device 5) serves for the optical detection of foreign parts in the fiber flakes.
  • the fibers are lifted from the clothing by an air flow 6) or separated from the roller by an air jam on the knock-off knife 7) and leave the cleaning machine through a suction funnel 8).
  • the parts which have been discharged enter a collecting space 9) and are conveyed out of the cleaning machine by a suction 10).
  • the following figures show explanations for generating an "air jam" in front of a separating knife as a detail from FIG. 1.
  • FIG. 2 shows the opening roller, a knife 3), a guide plate 4) and a knife 3) following the guide plate.
  • additional air is blown through nozzles 12) between the free space between the guide plate 4) and the knife 3).
  • the additional air volume cannot pass between the knife and the opening roller.
  • the air film revolving around the drum becomes disrupted and the vortices convey fibers and foreign parts away from the surface of the roller. Fibers and foreign parts are prevented by the knife 3) from continuing to circulate with the drum.
  • the nozzles extend approximately axially parallel to the surface of the roller.
  • Fig. 3 shows the formation of the air congestion through nozzles, which are arranged in front of the discharge knife 3).
  • FIG. 4 shows a nozzle arrangement in which the nozzles are arranged behind the separating knife 3) and blow between the knife and roller against the direction of rotation, in order to thus cause the air to jam in front of the knife edge.
  • the nozzles are controlled as in FIG. 2.
  • FIG. 5 shows a further form for generating an air jam in front of the separating knife 4).
  • the end of the guide plates 4) located in front of the separating knife 3) is mounted around a hinge 14) and is moved by an actuating element 16), for example a pneumatic cylinder or a magnet. If a foreign part is recognized “upstream”, the actuating element swivels the end of the guide plate away from the circumference of the opening roller.
  • the rotating air film follows the baffle and tries to fill the space between the pivoted baffle and the surface. The air film separates from the roller surface and jams in front of the knife. Fibers and foreign parts rise from the tip of the opening roller and can no longer be pulled through the narrow slot between the knife and roller surface. You will be eliminated.
  • Fig. 6 and Fig. 7 show the generation of an air jam by changing the geometry of the discharge knife 3).
  • the knives are usually in one flat angle to the surface of the roller. Lifting edges as shown in Fig. 1.7 are at an angle of 90 degrees to the roller surface.
  • the geometry of the discharge knife is changed to approx. 90 degrees. This is done in Fig. 6 by moving a block 16) parallel to the front of the knife. The block travels approximately flush to the tip of the knife and thus forms a roughly 90 degree tapping edge.
  • the block can be operated pneumatically or electrically and of course in sections.
  • FIG. 7 shows how the air jam can be caused by pivoting the knife 3).
  • the knife is pivoted from its normal flat angle around a pivot point at the knife tip, so that an angle of about 90 degrees to the roller surface is formed.
  • the swiveling can be effected by pneumatic cylinders.

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

Abstract

A method for spinning off impurities selectively from a fibre opening or detaching roller, at a textile machine, comprises forming temporary built-up air in front of a separation blade or an edge. This lifts the foreign bodies from the roller, and prevents them from passing between the blade and the roller, to be directed into a waste container or extracted by suction.

Description

Die Anmeldung D-19518783.0 beinhaltet ein System zur Erkennung von Fremdfasern an einer Öffnungsmaschine. Die Fremdteile werden durch Sensoren, die achsparallel eine Öffnungswalze kontrollieren, detektiert. Werden durch die Sensoren und die Auswerteelektronik Fremdteile detektiert, wird eine der Öffnungsmaschine nachgeschaltete Klappe automatisch angesteuert und die Fremdteile mit guten Fasern ausgeschleust. Nachteilig ist hierbei, daß relativ viele gute Fasern mit den Fremdteilen ausgeschleust werden. Eine Maschine OPTiSCAN, die in der DE - 43 30 173 beschrieben wird, hat in der Textilindustrie größte Verbreitung gefunden. Insbesondere weil nur an den Stellen, über die Breite, Fasern ausgeschleust werden, an denen Fremdteile detektiert werden.
Aufgabe der Erfindung ist es, eine einfache und sehr schnell reagierende Ausschleusevorrichtung zu schaffen, die es erlaubt, an einer Öffnungswalze die Fremdteile auch selektiv auszuscheiden. Die Ausscheidung erfolgt in achsparallel zur Walze angeordneten Zonen. Diese Zonen korrespondieren mit Erkennungsbereichen, die, im Materialfluß gesehen, diesen Zonen vorgelagert werden.
Wird in einer der Erkennungszonen ein Fremdteil erkannt, das von der Öffnungswalze am Umfang der Walze transportiert wird, erfolgt ein Signal zur Ausschleusung in der korrespondierenden Zone. Das korrespondierende Ausschleusungssegment kann sich an der gleichen Öffnungswalze etwas später im Materialdurchgang befinden, oder auf einer Öffnungswalze, die direkt von der Öffnungswalze die Fasern übernimmt, oder über ein oder mehrere Zwischenwalzen das Fasermaterial von der Öffnungswalze, an der die Fasern kontrolliert werden, übernimmt. Die Ausschleusung erfolgt durch das Erzeugen eines Luftstaus vor einem Ausscheidemesser oder einer Ausscheidekante. Zur Erklärung des Vorganges werden die Luftverhältnisse an einer Öffnungswalze vereinfacht geschildert. Die Öffnungswalze ist mit Mitnehmerspitzen am Umfang versehen. Diese Spitzen ziehen die Fasern mit. Mit der Öffnungswalze rotiert ein Luftfilm an der Oberfläche mit um. Zur mechanischen Ausscheidung von Verunreinigungen sind im geringen Abstand von der Oberfläche ein oder mehrere "Messer" angebracht. Große Teile können nicht zwischen Messer und Walzenoberfläche passieren und werden an der Messerkante ausgeschieden. Auch kleine Teile, die sich in der Peripherie des sich mit der Walze drehenden Luftfilms befinden, werden ausgeschieden. Um den Luftfilm und somit die Fasern an der Öffnungswalze zu halten, ist es jedoch notwendig, durch Leitbleche den Luftfilm an der Walzenoberfläche zu führen. Der Abstand zwischen dem Leitblech und der Öffnungswalze, an der Stelle, an der das Leitblech vor dem nächsten Messer endet, bestimmt, wie dick der Luftfilm um die Walze vor dem nächsten Messer ist. Ist der Luftfilm sehr dick im Vergleich zu dem Spalt den das Messer zur Oberfläche hat, wird sehr viel Material ausgeschieden. Dies wird in der EP 0110017 verdeutlicht. Diese Kenntnisse über die Luftverhältnisse an der Öffnungswalze sind grundlegend für die Erfindung. Erfindungsgemäß erfolgt die selektive Ausscheidung durch Erzeugung eines partiellen "Luftstaus" vor einem Ausscheidemesser, oder einer Ausscheidekante.
Durch den Luftstau wird das Fasermaterial mit dem Fremdteil aus den Spitzen der Öffnungswalze ausgehoben und an dem nachfolgenden Messer ausgeschieden. Die Erfindung wird an Hand von Schemata im folgenden erläutert.The application D-19518783.0 contains a system for the detection of foreign fibers on an opening machine. The foreign parts are detected by sensors that control an opening roller parallel to the axis. If foreign parts are detected by the sensors and the evaluation electronics, a flap downstream of the opening machine is automatically activated and the foreign parts are removed with good fibers. The disadvantage here is that relatively many good fibers are removed with the foreign parts. An OPTiSCAN machine, which is described in DE - 43 30 173, has found widespread use in the textile industry. In particular, because fibers are only removed at the points across the width at which foreign parts are detected.
The object of the invention is to provide a simple and very fast-reacting discharge device which also allows the foreign parts to be selectively separated out on an opening roller. The separation takes place in zones arranged parallel to the axis of the roller. These zones correspond to detection areas which, seen in the flow of material, are upstream of these zones.
If a foreign part that is transported by the opening roller on the circumference of the roller is detected in one of the detection zones, a signal for discharge is sent to the corresponding zone. The corresponding discharge segment can be located a little later in the material passage on the same opening roller, or on an opening roller that takes over the fibers directly from the opening roller, or via one or more intermediate rollers, the fiber material takes over from the opening roller, where the fibers are checked. The discharge takes place by creating an air jam in front of a knock-out knife or a separating edge. To explain the process, the air conditions on an opening roller are described in a simplified manner. The opening roller is provided with driver tips on the circumference. These tips pull the fibers with them. With the opening roller, an air film rotates on the surface. One or more “knives” are attached at a short distance from the surface for mechanical removal of impurities. Large parts cannot pass between the knife and the roller surface and are excreted at the knife edge. Also small parts that are in the periphery of the air film rotating with the roller are separated out. In order to keep the air film and thus the fibers on the opening roller, however, it is necessary to guide the air film on the roller surface through guide plates. The distance between the baffle and the opening roller, at the point where the baffle ends before the next knife, determines how thick the air film around the roller is before the next knife. If the air film is very thick compared to the gap that the knife has to the surface, a lot of material is excreted. This is made clear in EP 0110017. This knowledge of the air conditions at the opening roller is fundamental to the invention. According to the invention, the selective elimination takes place by producing a partial "air jam" in front of an elimination knife or an elimination edge.
Due to the air jam, the fiber material with the foreign part is lifted out of the tips of the opening roller and excreted on the subsequent knife. The invention is explained below with the aid of diagrams.

Fig. 1 zeigt die Wirkungsweise einer Reinigungsmaschine für Baumwolle. Über Zuführwalze 1) gelangt Fasermaterial zu einer Öffnungswalze 2). Durch die Öffnungswalze wird das Material an Messern 3) vorbeigeführt. Um den mitrotierenden Luftschirm auf der Trommel zu halten, sind Leitbleche 4) vorgesehen. Eine Einrichtung 5) dient zum optischen Erkennen von Fremdteilen in den Faserflocken. Die Fasern werden am Ende Ihres Umlaufs von einem Luftstrom 6) aus der Garnitur gehoben oder durch einen Luftstau am Abschlagmesser 7) von der Walze getrennt und verlassen die Reinigungsmaschine durch einen Absaugtrichter 8). Die ausgeschieden Teile gelangen in einen Sammelraum 9) und werden von einer Absaugung 10) aus der Reinigungsmaschine gefördert.
Die folgenden Figuren zeigen Ausführungen zur Erzeugung eines "Luftstaus" vor einem Abscheidemesser als Ausschnitt von Fig. 1.Fig. 1 shows the operation of a cleaning machine for cotton. Fiber material reaches an opening roller 2) via feed roller 1). The material is guided past knives 3) through the opening roller. To keep the co-rotating air screen on the drum, baffles 4) are provided. A device 5) serves for the optical detection of foreign parts in the fiber flakes. At the end of their circulation, the fibers are lifted from the clothing by an air flow 6) or separated from the roller by an air jam on the knock-off knife 7) and leave the cleaning machine through a suction funnel 8). The parts which have been discharged enter a collecting space 9) and are conveyed out of the cleaning machine by a suction 10).
The following figures show explanations for generating an "air jam" in front of a separating knife as a detail from FIG. 1.

Fig. 2 zeigt die Öffnungswalze, ein Messer 3), ein Leitblech 4) und ein dem Leitblech folgendes Messer 3). Um vor dem Messer 3) einen Luftstau 11) zu erzeugen, wird zusätzliche Luft über Düsen 12) zwischen den Freiraum zwischen dem Leitblech 4) und dem Messer 3) geblasen.
Die zusätzliche Luftmenge kann nicht zwischen Messer und Öffnungswalze passieren. Die Luft staut vor dem Messer. Der mit der Trommel umlaufende Luftfilm wird gestört und die Wirbel fördern Fasern und Fremdteile von der Oberfläche der Walze weg. Fasern und Fremdteile werden vom Messer 3) gehindert weiter mit der Trommel umzulaufen. Die Düsen erstrecken sich in etwa achsparallel zur Oberfläche der Walze. Sie werden in Gruppen selektiv, entsprechend der in zugeordneter Zone durch Sensoren 5) erkannten Fremdteile durch Magnetventile 13) gesteuert, betätigt.
Die durch den Luftstau und die Luftwirbel ausgeschiedenen Fasern und Fremdteile gelangen in den Abfallraum 9) und werden dort abgesaugt.
Es ist auch denkbar, die zusätzliche Luft im Bereich des Leitbleches zuzuführen.2 shows the opening roller, a knife 3), a guide plate 4) and a knife 3) following the guide plate. In order to create an air jam 11) in front of the knife 3), additional air is blown through nozzles 12) between the free space between the guide plate 4) and the knife 3).
The additional air volume cannot pass between the knife and the opening roller. The air jams in front of the knife. The air film revolving around the drum becomes disrupted and the vortices convey fibers and foreign parts away from the surface of the roller. Fibers and foreign parts are prevented by the knife 3) from continuing to circulate with the drum. The nozzles extend approximately axially parallel to the surface of the roller. They are operated selectively in groups, controlled by solenoid valves 13) in accordance with the foreign parts detected by sensors 5) in the assigned zone.
The fibers and foreign parts separated by the air congestion and the air swirls get into the waste space 9) and are extracted there.
It is also conceivable to supply the additional air in the area of the guide plate.

Fig. 3 zeigt die Bildung des Luftstaus durch Düsen, die vor dem Ausscheidemesser 3) angeordnet sind.Fig. 3 shows the formation of the air congestion through nozzles, which are arranged in front of the discharge knife 3).

Fig.4 zeigt eine Düsenanordnung bei der die Düsen hinter dem Ausscheidemesser 3) angeordnet sind und zwischen Messer und Walze entgegen der Drehrichtung hindurchblasen, um so vor der Messerkante den Luftstau zu bewirken. Die Ansteuerung der Düsen erfolgt wie bei Fig. 2.4 shows a nozzle arrangement in which the nozzles are arranged behind the separating knife 3) and blow between the knife and roller against the direction of rotation, in order to thus cause the air to jam in front of the knife edge. The nozzles are controlled as in FIG. 2.

Fig. 5 zeigt eine weitere Form zur Erzeugung eines Luftstaus vor dem Ausscheidemesser 4). Das vor dem Ausscheidemesser 3) gelegene Ende der Leitbleche 4) ist um ein Scharnier 14) gelagert und wird durch ein Betätigungselement 16) z.B. ein Pneumatik-Zylinder oder ein Magnet bewegt.
Wird ein Fremdteil "stromaufwärts" erkannt, schwenkt des Betätigungselement das Ende des Leitbleches von dem Umfang der Öffnungswalze weg. Der rotierende Luftfilm folgt dem Leitblech und versucht, den entstehenden Raum zwischen weggeschwenktem Leitblech und Oberfläche auszufüllen. Der Luftfilm trennt sich von der Walzenoberfläche und staut sich vor dem Messer. Fasern und Fremdteile heben von der Spitzen der Öffnungswalze ab und können nicht mehr durch den engen Schlitz zwischen Messer und Walzenoberfläche hindurchgezogen werden. Sie werden ausgeschieden.
Über die Breite der Öffnungswalze sind achsparallel mehrere Sektoren der zu betätigenden Leitblechenden angebracht, die mit den Erkennungssensoren korrespondieren.
Fig. 6 und Fig. 7 zeigen die Erzeugung eines Luftstaues durch ändern der Geometrie des Ausscheidemesser 3). Die Ausscheidemesser stehen normalerweise in einem flachen Winkel zur Oberfläche der Walze. Aushebekanten wie unter Fig. 1,7 dargestellt, stehen in einem Winkel von 90 Grad zur Walzenoberfläche. Um einen Luftstau zu erzeugen, wird die Geometrie des Ausscheidemessers auf ca. 90 Grad geändert.
Dies geschieht in Fig. 6 durch Verschieben eines Klotzes 16) parallel zur Front des Messers. Der Klotz fährt etwa bündig bis zur Messerspitze und bildet so eine etwa 90 Grad Abschlagkante. Die Betätigung des Klotzes kann pneumatisch oder elektrisch erfolgen und selbstverständlich sektionsweise.
Fig. 7 zeigt, wie der Luftstau durch Schwenken des Messers 3) bewirkt werden kann. Das Messer wird von seinem normalen flachen Winkel um einen Drehpunkt bei der Messerspitze geschwenkt, sodaß sich ein Winkel von etwa 90 Grad zur Walzenoberfläche bildet. Das Schwenken kann durch Pneumatikzylinder bewirkt werden. Durch die Erzeugung eines Luftstaus vor einem Ausscheidemesser können an einer Öffnungswalze einfach Fremdteile selektiv ausgeschleust werden.FIG. 5 shows a further form for generating an air jam in front of the separating knife 4). The end of the guide plates 4) located in front of the separating knife 3) is mounted around a hinge 14) and is moved by an actuating element 16), for example a pneumatic cylinder or a magnet.
If a foreign part is recognized “upstream”, the actuating element swivels the end of the guide plate away from the circumference of the opening roller. The rotating air film follows the baffle and tries to fill the space between the pivoted baffle and the surface. The air film separates from the roller surface and jams in front of the knife. Fibers and foreign parts rise from the tip of the opening roller and can no longer be pulled through the narrow slot between the knife and roller surface. You will be eliminated.
Across the width of the opening roller, several sectors of the guide plate ends to be actuated, which correspond to the detection sensors, are attached axially parallel.
Fig. 6 and Fig. 7 show the generation of an air jam by changing the geometry of the discharge knife 3). The knives are usually in one flat angle to the surface of the roller. Lifting edges as shown in Fig. 1.7 are at an angle of 90 degrees to the roller surface. In order to create an air jam, the geometry of the discharge knife is changed to approx. 90 degrees.
This is done in Fig. 6 by moving a block 16) parallel to the front of the knife. The block travels approximately flush to the tip of the knife and thus forms a roughly 90 degree tapping edge. The block can be operated pneumatically or electrically and of course in sections.
Fig. 7 shows how the air jam can be caused by pivoting the knife 3). The knife is pivoted from its normal flat angle around a pivot point at the knife tip, so that an angle of about 90 degrees to the roller surface is formed. The swiveling can be effected by pneumatic cylinders. By creating an air jam in front of a separating knife, foreign parts can easily be removed selectively on an opening roller.

Claims (11)

Verfahren zum selektiven Ausschleusen von Fremdteilen an einer Öffnungswalze oder Abnahmewalze einer Textilmaschine, dadurch gekennzeichnet, daß vor einem Ausscheidemesser oder einer Kante ein kurzzeitiger Luftstau erzeugt wird, der die Fremdteile von der Walze abhebt und so verhindert, daß sie zwischen Messer und Walze passieren können und dadurch in einen Abfallbehälter gelangen oder abgesaugt werden.Method for the selective removal of foreign parts on an opening roller or take-off roller of a textile machine, characterized in that a brief air jam is generated in front of a separating knife or an edge, which lifts the foreign parts from the roller and thus prevents them from passing between the knife and roller, and thereby get into a waste container or be suctioned off. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß der Luftstau an Stellen erzeugt wird, die mit Stellen korrespondieren, die im Materialfluss gesehen vor den Luftstaustellen liegen und an denen Fremdfasern detektiert werden.A method according to claim 1, characterized in that the air congestion is generated at locations which correspond to locations which, seen in the flow of material, lie in front of the air congestion locations and at which foreign fibers are detected. Verfahren nach einem der Ansprüche 1 oder 2 dadurch gekennzeichnet, daß der Luftstau an der gleichen Öffnungswalze, an der die Fremdteile detektiert werden, oder an einer der dieser Walze folgenden Walzen, zu der die Fasern übertragen werden, erzeugt wird.Method according to one of claims 1 or 2, characterized in that the air jam is generated on the same opening roller on which the foreign parts are detected or on one of the rollers following this roller to which the fibers are transferred. Verfahren nach einem der Ansprüche 1 - 3 dadurch gekennzeichnet, daß der Luftstau durch Preßluft erzeugt wird, die in einem Leitblech induziert wird, das vor dem Ausscheidemesser liegt.Method according to one of claims 1-3, characterized in that the air build-up is generated by compressed air, which is induced in a guide plate, which lies in front of the discharge knife. Verfahren nach einem der Ansprüche 1 - 3 dadurch gekennzeichnet, daß zur Erzeugung des Luftstaus Preßluft in den Bereich zwischen dem Ende des Leitblechs und dem Ausscheidemesser geblasen wird.Method according to one of claims 1-3, characterized in that, in order to generate the air jam, compressed air is blown into the area between the end of the guide plate and the separating knife. Verfahren nach einem der Ansprüche 1 - 3 dadurch gekennzeichnet, daß zur Erzeugung des Luftstaus vor den Messer Preßluft zwischen Ausscheidemesser und Walzenoberfläche hindurchgeblasen, gegen den Rotationssinn der Walze geblasen wird.Method according to one of claims 1-3, characterized in that, in order to generate the air jam in front of the knife, compressed air is blown through between the separating knife and the roller surface and is blown against the direction of rotation of the roller. Verfahren nach einem der Ansprüche 1 - 3 dadurch gekennzeichnet, daß zur Erzeugung des Luftstaus das Ende des Leitblechs vor dem Ausscheidemesser kurzzeitig von der Walzenoberfläche wegbewegt wird.Method according to one of claims 1-3, characterized in that the end of the guide plate in front of the discharge knife is briefly moved away from the roller surface in order to generate the air jam. Verfahren nach einem der Ansprüche 1 - 3 dadurch gekennzeichnet, daß zur Erzeugung des Luftstaus ein zusätzliches Element entlang dem Messer zur Messerspitze geschoben wird.Method according to one of claims 1-3, characterized in that an additional element is pushed along the knife to the knife tip in order to generate the air jam. Verfahren nach einem der Ansprüche 1 -3 dadurch gekennzeichnet, daß zur Erzeugung des Luftstaus das Ausscheidemesser kurzzeitig entgegen dem Drehsinn der Walze geschwenkt wird.Method according to one of claims 1 -3, characterized in that, in order to generate the air jam, the separating knife is briefly pivoted against the direction of rotation of the roller. Verfahren nach einen der Ansprüche 1 - 9 dadurch gekennzeichnet, daß der Luftstau nur für maximal 5 Sekunden erzeugt wird.Method according to one of claims 1-9, characterized in that the air jam is generated for a maximum of 5 seconds. Verfahren nach einem der Ansprüche 1 - 10 dadurch gekennzeichnet, daß statt des Leitblechs ein Messerelement vor dem Ausscheidemesser so ausgeformt ist, daß es wie ein Leitblech den Luftfilm führt.Method according to one of claims 1-10, characterized in that, instead of the guide plate, a knife element in front of the separating knife is shaped such that it guides the air film like a guide plate.
EP96117801A 1995-11-22 1996-11-07 Method for the selective removal of foreign matter from opening or doffer cylinder of a textile machine Withdrawn EP0775767A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19543526.5A DE19543526C5 (en) 1995-11-22 1995-11-22 Method for the selective removal of foreign parts at an opening or removal roller of a textile machine
DE19543526 1995-11-22

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EP0775767A1 true EP0775767A1 (en) 1997-05-28

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EP96117801A Withdrawn EP0775767A1 (en) 1995-11-22 1996-11-07 Method for the selective removal of foreign matter from opening or doffer cylinder of a textile machine

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DE (1) DE19543526C5 (en)
IN (1) IN189988B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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WO2002068740A1 (en) * 2001-02-22 2002-09-06 Maschinenfabrik Rieter Ag Method and device used on a carder for identifying and removing foreign matter from fiber material
WO2003069035A1 (en) * 2002-02-15 2003-08-21 Maschinenfabrik Rieter Ag Method and device mounted on a carder for detecting and eliminating foreign bodies in a fibrous material
CN113882050A (en) * 2021-10-28 2022-01-04 浙江龙源纺织股份有限公司 Production method of pure cotton high-quality combed yarn

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DE19645844A1 (en) * 1996-11-07 1998-05-14 Hergeth Hubert Removal of foreign fibres from rollers
DE19853810B4 (en) * 1997-12-10 2014-02-13 Hubert Hergeth Device for the selective separation of particles from a textile fiber stream
IT1306941B1 (en) 1998-02-19 2001-10-11 Truetzschler & Co DEVICE IN SPINNING PREPARATION, FOR THE SEPARATION OF FOREIGN BODIES ON A RAPID ROTATION CYLINDER FOR THE OPENING OF
DE19847237B4 (en) * 1998-02-19 2012-01-26 TRüTZSCHLER GMBH & CO. KG Spinning preparation apparatus for separating foreign matter on a high-speed roll for opening fiber material, e.g. B. Cotton u. like.
DE19806892A1 (en) 1998-02-19 1999-08-26 Truetzschler Gmbh & Co Kg Spinning preparation installation, for separating foreign matter from fiber material at a roller
EP1959039A3 (en) 2001-02-16 2009-05-27 Jossi Holding AG Separating device for foreign material
CN102861755A (en) * 2012-07-20 2013-01-09 贵州大自然科技有限公司 Method and device for recovering palm fiber from waste material for producing palm mattress
CN103757756B (en) * 2014-01-26 2017-03-15 河北宇腾羊绒制品有限公司 A kind of with the cashmere card device for getting rid of thick function

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
FR2769326A1 (en) * 1997-10-03 1999-04-09 Hubert A Hergeth PROCESS FOR THE AUTOMATIC REMOVAL OF FOREIGN ELEMENTS THAT ADHER TO OPENING CYLINDERS
DE19843587B4 (en) * 1997-10-03 2010-10-07 Hubert Hergeth Method for automatically removing adhering foreign parts from opening rollers in textile fiber processing machines
WO2002068740A1 (en) * 2001-02-22 2002-09-06 Maschinenfabrik Rieter Ag Method and device used on a carder for identifying and removing foreign matter from fiber material
WO2003069035A1 (en) * 2002-02-15 2003-08-21 Maschinenfabrik Rieter Ag Method and device mounted on a carder for detecting and eliminating foreign bodies in a fibrous material
CN113882050A (en) * 2021-10-28 2022-01-04 浙江龙源纺织股份有限公司 Production method of pure cotton high-quality combed yarn
CN113882050B (en) * 2021-10-28 2022-10-18 浙江龙源纺织股份有限公司 Production method of pure cotton high-quality combed yarn

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DE19543526C5 (en) 2015-10-01

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