EP1360351B2 - Separating device for foreign bodies - Google Patents

Separating device for foreign bodies Download PDF

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Publication number
EP1360351B2
EP1360351B2 EP02711730.8A EP02711730A EP1360351B2 EP 1360351 B2 EP1360351 B2 EP 1360351B2 EP 02711730 A EP02711730 A EP 02711730A EP 1360351 B2 EP1360351 B2 EP 1360351B2
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EP
European Patent Office
Prior art keywords
channel
fiber material
roller
separation
air
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.)
Expired - Lifetime
Application number
EP02711730.8A
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German (de)
French (fr)
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EP1360351B1 (en
EP1360351A1 (en
Inventor
Jürg Faas
Christoph Schönbächler
Armin Jossi
Andreas Meyenhofer
Walter Kiechl
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Maschinenfabrik Rieter AG
Uster Technologies AG
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Maschinenfabrik Rieter AG
Uster Technologies AG
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Priority claimed from EP01810153A external-priority patent/EP1233086A1/en
Application filed by Maschinenfabrik Rieter AG, Uster Technologies AG filed Critical Maschinenfabrik Rieter AG
Priority to EP02711730.8A priority Critical patent/EP1360351B2/en
Priority to EP08154583A priority patent/EP1959039A3/en
Publication of EP1360351A1 publication Critical patent/EP1360351A1/en
Application granted granted Critical
Publication of EP1360351B1 publication Critical patent/EP1360351B1/en
Publication of EP1360351B2 publication Critical patent/EP1360351B2/en
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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
    • D01G9/18—Arrangements for discharging fibres
    • 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 invention relates to a device for detecting and eliminating foreign substances from a fiber material which is fed via feed elements of a cleaning stage, wherein the fiber material is guided by means of a ⁇ ffnerwalze via one or more Abscheidesch and delivered to a subsequent conveyor channel.
  • a ⁇ ffnerwalze which is occupied with pins or hooks, cooperates with Ausscheidemessem, which are arranged on a partial circumference of the roller at intervals.
  • Ausscheidemessem which are arranged on a partial circumference of the roller at intervals.
  • the fiber is discharged via a shaft and two feed rollers to the surface of the ⁇ ffnerwalze.
  • sensors are proposed which are arranged opposite the surface of the opening roller. These are color sensors, which are arranged over the working width of the roller.
  • the color sensors determine a color deviation of the foreign fibers relative to the normal fiber and are connected to an evaluation electronics.
  • the surface of the opening roller may have a metallic shiny or white surface.
  • the cleaned fiber material is delivered to a suction line, in which a discharge device is integrated.
  • a discharge device is integrated.
  • using the signals of the sensors are operated time-displaced in a certain time interval hinged flaps, which supply the fiber material provided with foreign fibers a disposal line.
  • the ejection device shown is relatively far away from the actual delivery area of the opener roller, so that a larger fiber mass must be discharged, so that in this process, the detected foreign fibers are removed.
  • the circumferential tips of the set, or the pins adversely affect an exact detection of foreign fibers. This means that the foreign fibers, which are located directly in the area of these tips, may not be detected by the sensors as foreign fibers, especially as the process pattern of the clothing tips in the evaluation electronics is filtered out.
  • the fiber material is in the transfer to the opener roller as a relatively compact fiber fleece, which may not be detected inside, directly guided on the drum circumference foreign fibers.
  • an opening roller known, which also cooperates with Ausscheidemessern.
  • an air accumulation is generated, wherein the interspersed with foreign parts fiber material is lifted from the roller and transferred to a disposal facility.
  • the monitoring for foreign fibers also takes place on the roll surface of the opening roll.
  • many good fibers are also deposited in this device when discharging foreign fibers.
  • the DE-A1-198 47 237 shows a similar device, wherein for the separation of the detected on the drum foreign fibers directed approximately tangential to the roller blast air flow is generated, wherein the resulting located in the region of the Blas Kunststoffstromes fibers are lifted from the roll surface and fed to a disposal space via the resulting negative pressure on the roll surface ,
  • it is a ⁇ ffnerwalze, which has the task of further open the supplied fiber, or termeschliessen into smaller fiber flakes.
  • An additional cleaning of the fiber material of contamination is not provided here. Even with this arrangement, there is the danger, as described above, that not all foreign fibers in the fiber material guided via the opener roller can be detected or removed.
  • the opening device consists of one or two feed rollers that deliver the fiber material supplied via a shaft to a high-speed opening roller.
  • the fiber material further dissolved by the opening roller is fed in free fall to a downwardly guided shaft in which a device for detecting and separating foreign substances is mounted.
  • the foreign substances detected via a plurality of juxtaposed sensors or a camera are blown out sequentially into a special collecting container via subsequently attached blast nozzles arranged in rows. These nozzles are controlled via a control unit, which is connected to the sensor.
  • the blowing nozzles are very often controlled via the controller for blowing out.
  • the blowing cone of the blast air flow must have an appropriate size so that the detected foreign substances are safely eliminated.
  • the invention thus has the object to avoid the disadvantages of the prior art described, in order to obtain an optimal means for the targeted elimination of foreign substances and the elimination of good fibers is minimized.
  • the term "delivery area” is to be understood as meaning the area directly at the discharge opening of the cleaning stage or also the area which follows directly after the discharge opening. With this device it is ensured that the detection device (sensor) a Fasergutmasse is supplied in the free flake stream, from which conventional contaminants, such as Trash parts, dirt, dust and the like have already been deposited at the upstream cleaning stage in a conventional manner substantially. In addition, the foreign substances still to be detected in an open flock flow easier to detect, as between the set of an opening roller. By attaching directly in the delivery area of the cleaning stage, the fiber air flow has a speed at which the detection of foreign substances is still easily feasible. By the elimination of entrained in the fiber material contaminants already at the cleaning stage, the subsequent detection and separation can concentrate on the foreign matter, which are not deposited due to their physical property at the upstream cleaning stage.
  • the discharge area - seen in the conveying direction - is designed as a tapered and funnel-shaped channel, which opens into the delivery channel. This ensures that in the area of the cleaning stage, the fiber material can be guided over a correspondingly large cleaning surface, while for the further transport of the cleaned fiber material over the funnel-shaped channel, this can be brought together on a narrow, tubular transport channel. This makes it possible to keep the energy required for the transport of fiber to a minimum.
  • the discharge area is provided in a first part with an approximately constant cross section, which is followed by a funnel-shaped part, which opens into the delivery channel.
  • a channel for air supply in the delivery direction is arranged in the delivery region.
  • the previously claimed sensors can be formed from one or more cameras. Furthermore, individual sensors for monitoring are possible.
  • the sensor is preferably associated with a lighting device.
  • the separation device may be formed from adjacent blast nozzles, which are sequentially controlled via the sensor by a control unit.
  • Fig. 1 shows a cleaning stage 1, which is provided with a ⁇ ffnerwalze 4 and with Abscheidemessern 5, which are arranged over a portion of the circumference of the ⁇ ffnerwalze one behind the other.
  • the fiber material which is conveyed in the form of flakes by a transport air stream, is fed to the cleaning stage 1 via a feed chute 6.
  • the fiber material can be delivered from an upstream cleaning stage, in which, for example, a rough cleaning is performed.
  • the cleaning stage 1 shown is then connected downstream of the "coarse cleaner” as a "fine cleaner”.
  • the fiber material enters the area of action of an opener roller pair 8.
  • the fiber flocks are opened further and metered down delivered, wherein the fiber material passes into the nip of a wire roller 10 and a transport roller 11.
  • the screen roller 10 and the transport roller 11 are connected to a drive not shown in detail, which drives them in the opposite direction of rotation, whereby the fiber material supplied from above is passed between the two rollers.
  • the transport roller 11 has a smooth surface, while the screen roller 10 has a perforated surface, wherein the interior of the screen surface is connected to a schematically shown channel 12, in which most of the transport air of the fiber air mixture is discharged.
  • the fiber material guided between the rollers 11 and 10 is still in flake form and enters the feed channel S of a subsequent feed roller 14, which cooperates with a feed trough 15.
  • the fiber material Due to the funnel-shaped merging of the fiber material between the feed roller 14 and the feed trough 15, the fiber material is compressed and transferred in the region of the feed lip 16 to the schematically indicated set 7 of the revolving opener roller 4.
  • the fiber flakes are opened further, whereby the entrained in the fiber material impurities such as dirt, Trashmaschine, etc. can escape from the Fasergutstrom by the resulting centrifugal force on the opening roller 4 to the outside.
  • a tray plate 18 is arranged, via which the cleaned fiber material is fed to a discharge opening 20.
  • a channel 22 is arranged, via which air L is supplied from an air pressure source not shown in detail. The air L is fed approximately in the tangential direction to the opening roller 4 and supports the detachment of the fiber material located in the clothing 7 of the offener roller 4.
  • the air L could also be supplied directly from the ambient air, which is sucked in by a negative pressure generated in the transport channel 26.
  • the fiber material is discharged to a delivery region or into a delivery tube 24 and transferred by the action of the air L into a subsequent transport channel 26. From this transport channel 26, for example, the fiber material is supplied to either a further cleaning stage or a subsequent feed chute of a carding machine.
  • the discharge pipe 24 is provided on its first portion 28 with a constant cross-section whose width B corresponds approximately to the length of the opening roller 4.
  • the section 28 of the discharge pipe 24 opens into a in the transport direction T tapered, second section 30 (called “hopper"), which opens into the transport channel 26.
  • two opposite CCD cameras 32, 32 'and 33, 33' are mounted in pairs behind the dispensing opening 20, each of which is integrated with a transparent window 35, 36 which is integrated in the subsection 28 Monitoring the output of the cleaning stage 1 fiber material.
  • the section 28 are also attached background strips 38, which are positioned to the respective camera 32, 32 'and 33, 33' on the opposite side of the channel.
  • the color of the background strip 38 corresponds to the set parameters for the fibers, so that the cameras do not respond when the partial section 28 is empty.
  • a similar device is for example from WO-96/35831 refer to.
  • the respective cameras 32-33 'lighting fixture 40 are assigned, which provide sufficient illumination of the guided past the cameras fiber material.
  • the cameras 32-33 via the paths 42, 42', 43 and 43 'connected to a control unit ST, via which the monitoring results of the control unit ST are transmitted.
  • a corresponding valve 48 is opened via the control line 45, wherein the compressed air supplied via a compressed air source 46 is released to a blower nozzle 50 assigned to the respective valve 48.
  • About the resulting air pulse P detected foreign material is discharged through an opening 52 to a container 54.
  • the container 54 may be closed or connected to the atmosphere with corresponding openings. It is also possible to provide the container 54 with corresponding suction means for removing the deposited material.
  • the container may also be provided with an air return 55, via which the air supplied to the container is returned to the section 30.
  • blowing nozzles 50 may be disposed below the discharge pipe 24, wherein the detected foreign parts are blown up through a corresponding opening in the pipe 24.
  • the collecting container must be designed or arranged accordingly, so that the excreted foreign parts can not get back into the channel 24.

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

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Erkennen und Ausscheiden von Fremdstoffen aus einem Fasermaterial, das über Zuführelemente einer Reinigungsstufe zugeführt wird, bei welcher das Fasermaterial mittels einer Öffnerwalze über ein oder mehrere Abscheidemittel geführt und an einen nachfolgenden Förderkanal abgegeben wird.The invention relates to a device for detecting and eliminating foreign substances from a fiber material which is fed via feed elements of a cleaning stage, wherein the fiber material is guided by means of a Öffnerwalze via one or more Abscheidemittel and delivered to a subsequent conveyor channel.

Aus der EP 0 877 104 ist eine Vorrichtung bekannt, bei der mittels eines Speisewalzenpaares Fasern kontinuierlich einer Reinigungswalze zugeführt werden, welche mit einem an einem Umfangsabschnitt angeordneten festen Messerrost zusammenwirkt. Das mittels der Reinigungswalze gereinigte und geöffnete Fasermaterial wird in einem Präsentationsschacht beschleunigt und dann einer Fasertransportleitung zugeführt. Dabei ist im Präsentationsschacht eine Ausscheidevorrichtung zum Ausscheiden von Fremdmaterial vorgesehen. Diese Ausscheidevorrichtung ist jedoch in einem Bereich angeordnet, in dem das Fasermaterial eine hohe Geschwindigkeit aufweist, so dass eine sichere Trennung des Fasermaterials und des Fremdmaterials nicht gewährleistet ist.From the EP 0 877 104 a device is known in which by means of a feeding roller pair fibers are continuously supplied to a cleaning roller, which cooperates with a arranged on a peripheral portion fixed blade rust. The cleaned and opened by means of the cleaning roller fiber material is accelerated in a presentation shaft and then fed to a fiber transport line. In this case, a separation device for separating foreign material is provided in the presentation shaft. However, this separation device is arranged in a region in which the fiber material has a high speed, so that a secure separation of the fiber material and the foreign material is not guaranteed.

Aus der DE-A1-19518 783 ist eine Ausführung bekannt, wobei eine Öffnerwalze, die mit Stiften oder Haken besetzt ist, mit Ausscheidemessem zusammenarbeitet, welche auf einem Teilumfang der Walze in Abständen angeordnet sind. Bei der Überführung des Fasergutes über die Ausscheidemesser werden - in Bezug auf das Fasergewicht - insbesondere schwerere und unerwünschte Bestandteile wie Schmutz, Trash, Staub und dergleichen aus dem Fasergut abgeschieden. Das Fasergut wird über einen Schacht und zwei Zuführwalzen an die Oberfläche der Öffnerwalze abgegeben. Um Fremdfasern in dem über die Öffnerwalze geführten Fasergut zu erkennen, werden Sensoren vorgeschlagen, die gegenüber der Oberfläche der Öffnerwalze angeordnet sind. Dabei handelt es sich um Farbsensoren, die über die Arbeitsbreite der Walze angeordnet sind. Die Farbsensoren stellen dabei eine Farbabweichung der Fremdfasern gegenüber der Normalfaser fest und sind mit einer Auswerte-Elektronik verbunden. Zur Detektion der Fremdfasern kann die Oberfläche der Öffnerwalze eine metallisch glänzende oder weisse Oberfläche aufweisen. Das gereinigte Fasergut wird an eine Absaugleitung abgegeben, in welcher eine Ausschleusevorrichtung integriert ist. Dabei werden anhand der Signale der Sensoren zeitversetzt in einem bestimmten Zeitintervall schwenkbare Klappen betätigt, welche das mit Fremdfasern versehene Fasergut einer Entsorgungsleitung zuführen. Die gezeigte Ausschleusevorrichtung ist relativ weit vom eigentlichen Abgabebereich der Öffnerwalze entfernt, so dass eine grössere Fasermasse ausgeschleust werden muss, damit bei diesem Vorgang auch die detektierten Fremdfasern entfernt werden.From the DE-A1-19518 783 an embodiment is known, wherein a Öffnerwalze, which is occupied with pins or hooks, cooperates with Ausscheidemessem, which are arranged on a partial circumference of the roller at intervals. In the transfer of the fiber material on the Ausscheidemesser be - with respect to the fiber weight - especially heavier and undesirable components such as dirt, trash, dust and the like from the fiber material deposited. The fiber is discharged via a shaft and two feed rollers to the surface of the Öffnerwalze. In order to detect foreign fibers in the fiber material guided via the opening roller, sensors are proposed which are arranged opposite the surface of the opening roller. These are color sensors, which are arranged over the working width of the roller. The color sensors determine a color deviation of the foreign fibers relative to the normal fiber and are connected to an evaluation electronics. For detecting the foreign fibers, the surface of the opening roller may have a metallic shiny or white surface. The cleaned fiber material is delivered to a suction line, in which a discharge device is integrated. In this case, using the signals of the sensors are operated time-displaced in a certain time interval hinged flaps, which supply the fiber material provided with foreign fibers a disposal line. The ejection device shown is relatively far away from the actual delivery area of the opener roller, so that a larger fiber mass must be discharged, so that in this process, the detected foreign fibers are removed.

Bei der Überwachung des Fasergutes auf der mit einer Garnitur oder Stiften besetzten Öffnerwalze wirken sich die umlaufenden Spitzen der Garnitur, beziehungsweise der Stifte, nachteilig auf eine exakte Erkennung der Fremdfasern aus. Das heisst, die Fremdfasern, die sich direkt im Bereich dieser Spitzen befinden, werden unter Umständen von den Sensoren nicht als Fremdfasern detektiert, zumal das Ablaufbild der Garniturspitzen in der Auswerte-Elektronik ausgefiltert wird.When monitoring the fiber material on the occupied with a set or pins opener roller, the circumferential tips of the set, or the pins, adversely affect an exact detection of foreign fibers. This means that the foreign fibers, which are located directly in the area of these tips, may not be detected by the sensors as foreign fibers, especially as the process pattern of the clothing tips in the evaluation electronics is filtered out.

Ausserdem liegt hierbei das Fasergut bei der Überführung auf der Öffnerwalze als relativ kompaktes Faservlies vor, wobei unter Umständen innenliegende, direkt auf dem Trommelumfang geführte Fremdfasern nicht erfasst werden können.Moreover, in this case, the fiber material is in the transfer to the opener roller as a relatively compact fiber fleece, which may not be detected inside, directly guided on the drum circumference foreign fibers.

Des weiteren ist aus der DE-A1-195 43 526 eine Öffnungswalze bekannt, die ebenfalls mit Ausscheidemessern zusammenwirkt. Dabei wird zum Ausscheiden von detektierten Fremdfasern im Bereich vor einem Ausscheidemesser ein Luftstau erzeugt, wobei das mit Fremdteilen durchsetzte Fasergut von der Walze abgehoben und zu einer Entsorgungseinrichtung überführt wird. Die Überwachung auf Fremdfasern erfolgt hierbei ebenfalls auf der Walzenoberfläche der Offnungswalze. Ausserdem werden bei dieser Einrichtung beim Ausschleusen von Fremdfasern auch viele Gutfasern mit abgeschieden.Furthermore, from the DE-A1-195 43 526 an opening roller known, which also cooperates with Ausscheidemessern. In this case, for the separation of detected foreign fibers in the area before a Ausscheidemesser an air accumulation is generated, wherein the interspersed with foreign parts fiber material is lifted from the roller and transferred to a disposal facility. The monitoring for foreign fibers also takes place on the roll surface of the opening roll. In addition, many good fibers are also deposited in this device when discharging foreign fibers.

Die DE-A1-198 47 237 zeigt eine ähnliche Einrichtung, wobei zum Ausscheiden der auf der Trommel detektierten Fremdfasern ein etwa tangential zur Walze gerichteter Blasluftstrom erzeugt wird, wobei über den dabei entstehenden Unterdruck auf der Walzenoberfläche die in dem Bereich des Blasluftstromes befindlichen Fasern von der Walzenoberfläche abgehoben und einem Entsorgungsraum zugeführt werden. Im gezeigten Beispiel handelt es sich um eine Öffnerwalze, welche die Aufgabe hat, das zugeführte Fasergut weiter zu öffnen, beziehungsweise in kleinere Faserflocken aufzuschliessen. Eine zusätzliche Reinigung des Fasergutes von Verschmutzungen ist hierbei nicht vorgesehen. Auch bei dieser Anordnung besteht die Gefahr, wie zuvor beschrieben, dass nicht alle Fremdfasern in dem über die Öffnerwalze geführten Fasergut ermittelt, beziehungsweise entfernt werden können.The DE-A1-198 47 237 shows a similar device, wherein for the separation of the detected on the drum foreign fibers directed approximately tangential to the roller blast air flow is generated, wherein the resulting located in the region of the Blasluftstromes fibers are lifted from the roll surface and fed to a disposal space via the resulting negative pressure on the roll surface , In the example shown, it is a Öffnerwalze, which has the task of further open the supplied fiber, or aufzuschliessen into smaller fiber flakes. An additional cleaning of the fiber material of contamination is not provided here. Even with this arrangement, there is the danger, as described above, that not all foreign fibers in the fiber material guided via the opener roller can be detected or removed.

Aus der DE-A1-195 16 568 ist ebenso nur eine Auflösewalze zu entnehmen, an welcher keine Reinigungsarbeit durchgeführt wird. Die Auflöse-Einrichtung besteht dabei aus einer oder zwei Einzugswalzen, die das über einen Schacht zugeführte Fasergut an eine Schnelllaufende Öffnungswalze abgeben. Das von der Öffnungswalze weiter aufgelöste Fasergut wird im freien Fall einem nach unten geführten Schacht zugeführt, in welchem eine Vorrichtung zum Erkennen und Ausscheiden von Fremdstoffen angebracht ist. Die über eine Mehrzahl von nebeneinander liegenden Sensoren oder einer Kamera erfassten Fremdstoffe werden über nachfolgend angebrachte und in Reihen nebeneinander liegende Blasdüsen sequenziell in einen speziellen Auffangbehälter ausgeblasen. Diese Blasdüsen werden dabei über eine Steuereinheit angesteuert, die mit der Sensorik verbunden ist. Mit der Sensorik werden dabei auch noch im Fasergutstrom befindliche Verschmutzungen, Trashteile und dergleichen erfasst, wodurch die Blasdüsen über die Steuerung sehr häufig zum Ausblasen angesteuert werden. Der Blaskegel des Blasluftstromes muss eine entsprechende Grösse aufweisen, damit die detektierten Fremdstoffe sicher ausgeschieden werden.From the DE-A1-195 16 568 is also only an opening roller to remove, on which no cleaning work is performed. The opening device consists of one or two feed rollers that deliver the fiber material supplied via a shaft to a high-speed opening roller. The fiber material further dissolved by the opening roller is fed in free fall to a downwardly guided shaft in which a device for detecting and separating foreign substances is mounted. The foreign substances detected via a plurality of juxtaposed sensors or a camera are blown out sequentially into a special collecting container via subsequently attached blast nozzles arranged in rows. These nozzles are controlled via a control unit, which is connected to the sensor. With the sensor, even contaminants, trash parts and the like which are still present in the fiber-material flow are thereby detected, as a result of which the blowing nozzles are very often controlled via the controller for blowing out. The blowing cone of the blast air flow must have an appropriate size so that the detected foreign substances are safely eliminated.

Bei jedem Blasintervall werden zusätzlich zu den Fremdstoffen auch eine grosse Zahl von Gutfasern mit abgeschieden. Dies wirkt sich jedoch als Verlust in der Produktivität des gewonnenen Fasergutes aus.At each blowing interval, a large number of good fibers are also deposited in addition to the foreign substances. However, this has a loss in productivity of the recovered fiber.

Die Erfindung stellt sich somit die Aufgabe, die beschriebenen Nachteile des Standes der Technik zu vermeiden, um eine optimale Einrichtung zum gezielten Ausscheiden von Fremdstoffen zu erhalten und die Ausscheidung von Gutfasern minimiert wird.The invention thus has the object to avoid the disadvantages of the prior art described, in order to obtain an optimal means for the targeted elimination of foreign substances and the elimination of good fibers is minimized.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Unter dem Begriff "Abgabebereich" ist dabei der Bereich direkt bei der Abgabeöffnung der Reinigungsstufe oder auch der Bereich zu verstehen, welcher direkt im Anschluss an die Abgabeöffnung folgt. Mit dieser Einrichtung wird gewährleistet, dass der Erkennungsvorrichtung (Sensorik) eine Fasergutmasse im freien Flockenstrom zugeführt wird, aus welcher übliche Verschmutzungen, wie zum Beispiel Trashteile, Schmutz, Staub und dergleichen bereits an der vorgeschalteten Reinigungsstufe auf herkömmliche Weise im wesentlichen abgeschieden worden sind. Ausserdem sind die noch zu erfassenden Fremdstoffe in einem offenen Flockenstrom leichter zu erfassen, als zwischen der Garnitur einer Öffnungswalze. Durch die Anbringung unmittelbar im Abgabebereich der Reinigungsstufe besitzt der Faserluftstrom eine Geschwindigkeit, bei welcher die Erkennung von Fremdstoffen noch problemlos durchführbar ist. Durch die Ausscheidung der im Fasergut mitgeführten Verschmutzungen bereits an der Reinigungsstufe kann sich die nachfolgende Erkennungs- und Ausscheidevorrichtung auf die Fremdstoffe konzentrieren, die aufgrund ihrer physikalischen Eigenschaft an der vorgeschalteten Reinigungsstufe nicht abgeschieden werden.The term "delivery area" is to be understood as meaning the area directly at the discharge opening of the cleaning stage or also the area which follows directly after the discharge opening. With this device it is ensured that the detection device (sensor) a Fasergutmasse is supplied in the free flake stream, from which conventional contaminants, such as Trash parts, dirt, dust and the like have already been deposited at the upstream cleaning stage in a conventional manner substantially. In addition, the foreign substances still to be detected in an open flock flow easier to detect, as between the set of an opening roller. By attaching directly in the delivery area of the cleaning stage, the fiber air flow has a speed at which the detection of foreign substances is still easily feasible. By the elimination of entrained in the fiber material contaminants already at the cleaning stage, the subsequent detection and separation can concentrate on the foreign matter, which are not deposited due to their physical property at the upstream cleaning stage.

Da die Reinigungsstufe im wesentlichen mit einer Öffnerwalze versehen ist, die eine entsprechende Länge aufweist, wird vorgeschlagen, dass der Abgabebereich - in Förderrichtung gesehen - als sich verjüngender und trichterförmiger Kanal ausgebildet ist, der in den Förderkanal mündet. Dadurch wird gewährleistet, dass im Bereich der Reinigungsstufe das Fasergut über eine entsprechend grosse Reinigungsfläche geführt werden kann, während zum Weitertransport des gereinigten Fasergutes über den trichterförmig ausgebildeten Kanal dieses an einem schmaleren, rohrförmigen Transportkanal zusammengeführt werden kann. Dadurch ist es möglich, die aufzuwendende Energie für den Faserguttransport auf einem Minimum zu halten.Since the cleaning stage is essentially provided with a Öffnerwalze having a corresponding length, it is proposed that the discharge area - seen in the conveying direction - is designed as a tapered and funnel-shaped channel, which opens into the delivery channel. This ensures that in the area of the cleaning stage, the fiber material can be guided over a correspondingly large cleaning surface, while for the further transport of the cleaned fiber material over the funnel-shaped channel, this can be brought together on a narrow, tubular transport channel. This makes it possible to keep the energy required for the transport of fiber to a minimum.

Um den Faserstrom im Querschnitt zwischen der Erkennung und Ausscheidung konstant zu halten, wird vorgeschlagen, dass der Abgabebereich in einem ersten Teil mit einem annähernd konstanten Querschnitt versehen ist, an welchen sich ein trichterförmiger Teil anschliesst, welcher in den Förderkanal mündet. Bei Anbringung der Erkennungs- und Ausscheidevorrichtung im Bereich des konstanten Querschnittes des Kanals wird die exakte Erkennung und Ausscheidung von Fremdstoffen gewährleistet. Das heisst, die Lage der detektierten Fremdstoffe bleibt im Faserstrom zwischen der Erkennung und Ausscheidung annähernd gleich.In order to keep the fiber flow in the cross section between the detection and the discharge constant, it is proposed that the discharge area is provided in a first part with an approximately constant cross section, which is followed by a funnel-shaped part, which opens into the delivery channel. When attaching the detection and separation device in the region of the constant cross-section of the channel, the exact detection and elimination of foreign substances is ensured. This means that the position of the detected foreign substances remains approximately the same in the fiber flow between detection and elimination.

Zur Ablösung des Fasergutes von der Öffnerwalze und zur Erzeugung eines nachfolgenden Transportluftstromes wird vorgeschlagen, dass im Abgabebereich ein Kanal zur Luftzuführung in Förderrichtung angeordnet ist.To detach the fiber material from the opener roller and to generate a subsequent transport air flow, it is proposed that a channel for air supply in the delivery direction is arranged in the delivery region.

Die zuvor beanspruchte Sensorik kann aus einer oder mehreren Kameras gebildet werden. Des weiteren sind auch Einzelsensoren zur Überwachung möglich. Der Sensorik ist vorzugsweise eine Beleuchtungseinrichtung zugeordnet.The previously claimed sensors can be formed from one or more cameras. Furthermore, individual sensors for monitoring are possible. The sensor is preferably associated with a lighting device.

Die Ausscheidevorrichtung kann aus nebeneinander angeordneten Blasdüsen ausgebildet sein, welche sequenziell über die Sensorik durch eine Steuereinheit ansteuerbar sind.The separation device may be formed from adjacent blast nozzles, which are sequentially controlled via the sensor by a control unit.

Weitere Vorteile der Erfindung werden in nachfolgenden Ausführungsbeispielen gezeigt und näher beschrieben.Further advantages of the invention will be shown and described in more detail in the following exemplary embodiments.

Es zeigen:

Fig. 1
Eine schematische Seitenansicht einer Reinigungsstufe mit nachfolgender Erkennungs- und Ausscheidevorrichtung von Fremdstoffen.
Fig. 2
Eine Teilansicht X gemäss Fig. 1 des Abgabebereiches der Reinigungsstufe
Show it:
Fig. 1
A schematic side view of a cleaning stage with subsequent recognition and separation of foreign substances.
Fig. 2
A partial view X according to Fig. 1 the delivery area of the cleaning stage

Fig. 1 zeigt eine Reinigungsstufe 1, die mit einer Öffnerwalze 4 und mit Abscheidemessern 5 versehen ist, welche über einen Teilbereich des Umfanges der Öffnerwalze hintereinander angeordnet sind. Das Fasergut, welches in Flockenform durch einen Transportluftstrom befördert wird, wird der Reinigungsstufe 1 über einen Speiseschacht 6 zugeführt. Fig. 1 shows a cleaning stage 1, which is provided with a Öffnerwalze 4 and with Abscheidemessern 5, which are arranged over a portion of the circumference of the Öffnerwalze one behind the other. The fiber material, which is conveyed in the form of flakes by a transport air stream, is fed to the cleaning stage 1 via a feed chute 6.

Das Fasergut kann dabei von einer vorgeschalteten Reinigungsstufe geliefert werden, in welcher zum Beispiel eine Grobreinigung vorgenommen wird. Die gezeigte Reinigungsstufe 1 wird dann als "Feinreiniger" dem "Grobreiniger" nachgeschaltet.The fiber material can be delivered from an upstream cleaning stage, in which, for example, a rough cleaning is performed. The cleaning stage 1 shown is then connected downstream of the "coarse cleaner" as a "fine cleaner".

In dem Speiseschacht 6 gelangt das Fasergut in den Wirkungsbereich eines Öffnerwalzenpaares 8. Über die Öffnerwalzen 8 werden die Faserflocken weiter geöffnet und dosiert nach unten abgegeben, wobei das Fasergut in den Klemmspalt einer Siebwalze 10 und einer Transportwalze 11 gelangt. Die Siebwalze 10 und die Transportwalze 11 sind mit einem nicht näher gezeigten Antrieb verbunden, welcher sie in entgegengesetzter Drehrichtung antreibt, wodurch das von oben zugeführte Fasermaterial zwischen den beiden Walzen hindurchgeführt wird. Die Transportwalze 11 weist eine glatte Oberfläche auf, während die Siebwalze 10 eine perforierte Oberfläche aufweist, wobei der Innenraum der Siebfläche mit einem schematisch gezeigten Kanal 12 verbunden ist, in welchem der grösste Teil der Transportluft des Faserluftgemisches abgeführt wird.In the feed chute 6, the fiber material enters the area of action of an opener roller pair 8. About the opening rollers 8, the fiber flocks are opened further and metered down delivered, wherein the fiber material passes into the nip of a wire roller 10 and a transport roller 11. The screen roller 10 and the transport roller 11 are connected to a drive not shown in detail, which drives them in the opposite direction of rotation, whereby the fiber material supplied from above is passed between the two rollers. The transport roller 11 has a smooth surface, while the screen roller 10 has a perforated surface, wherein the interior of the screen surface is connected to a schematically shown channel 12, in which most of the transport air of the fiber air mixture is discharged.

Das zwischen den Walzen 11 und 10 hindurchgeführte Fasergut liegt immer noch in Flockenform vor und gelangt in den Speisekanal S einer nachfolgenden Speisewalze 14, die mit einer Speisemulde 15 zusammenwirkt.The fiber material guided between the rollers 11 and 10 is still in flake form and enters the feed channel S of a subsequent feed roller 14, which cooperates with a feed trough 15.

Durch das trichterförmige Zusammenführen des Fasergutes zwischen der Speisewalze 14 und der Speisemulde 15 wird das Fasergut verdichtet und im Bereich der Speiselippe 16 an die schematisch angedeutete Garnitur 7 der umlaufenden Öffnerwalze 4 übergeben. Beim Abziehen des Fasergutes im Bereich der Speiselippe 16 durch die Garnitur 7 werden die Faserflocken weiter geöffnet, wodurch die im Fasergutstrom mitgeführten Verunreinigungen wie Schmutz, Trashteile, usw. aus dem Fasergutstrom durch die entstehende Fliehkraft auf der Öffnerwalze 4 nach aussen austreten können.Due to the funnel-shaped merging of the fiber material between the feed roller 14 and the feed trough 15, the fiber material is compressed and transferred in the region of the feed lip 16 to the schematically indicated set 7 of the revolving opener roller 4. When removing the fiber material in the region of the feed lip 16 through the clothing 7, the fiber flakes are opened further, whereby the entrained in the fiber material impurities such as dirt, Trashteile, etc. can escape from the Fasergutstrom by the resulting centrifugal force on the opening roller 4 to the outside.

Durch die Fliehkraft gelangen diese Teile in den Bereich der Abscheidemesser 5 und werden dort abgeschieden und zu einer nicht näher gezeigten Entsorgungseinrichtung überführt.As a result of the centrifugal force, these parts reach the region of the separating blades 5 and are deposited there and transferred to a disposal device (not shown).

Im Anschluss an die Abscheidemesser 5 ist ein Muldenblech 18 angeordnet, über welches das gereinigte Fasergut einer Abgabeöffnung 20 zugeführt wird. Im Bereich der Abgabeöffnung 20 ist ein Kanal 22 angeordnet, über welchen Luft L von einer nicht näher gezeigten Luftdruckquelle zugeführt wird. Die Luft L wird etwa in tangentialer Richtung zur Öffnerwalze 4 zugeführt und unterstützt den Ablösevorgang des in der Garnitur 7 der Offnerwalze 4 befindlichen Fasergutes.Following the separating knife 5, a tray plate 18 is arranged, via which the cleaned fiber material is fed to a discharge opening 20. In the region of the discharge opening 20, a channel 22 is arranged, via which air L is supplied from an air pressure source not shown in detail. The air L is fed approximately in the tangential direction to the opening roller 4 and supports the detachment of the fiber material located in the clothing 7 of the offener roller 4.

Die Luft L könnte auch direkt aus der Umgebungsluft zugeführt werden, welche durch einen im Transportkanal 26 erzeugten Unterdruck angesaugt wird.The air L could also be supplied directly from the ambient air, which is sucked in by a negative pressure generated in the transport channel 26.

Das Fasergut wird dadurch an einen Abgabebereich, beziehungsweise in ein Abgaberohr 24 abgeführt und durch die Einwirkung der Luft L in einen nachfolgenden Transportkanal 26 überführt. Von diesem Transportkanal 26 wird zum Beispiel das Fasergut entweder einer weiteren Reinigungsstufe oder einem nachfolgenden Speiseschacht einer Karde zugeführt.As a result, the fiber material is discharged to a delivery region or into a delivery tube 24 and transferred by the action of the air L into a subsequent transport channel 26. From this transport channel 26, for example, the fiber material is supplied to either a further cleaning stage or a subsequent feed chute of a carding machine.

Wie insbesondere in der Teilansicht der Fig. 2 zu entnehmen, ist das Abgaberohr 24 auf seinem ersten Teilabschnitt 28 mit einem gleichbleibenden Querschnitt versehen, dessen Breite B etwa der Länge der Öffnerwalze 4 entspricht. Der Teilabschnitt 28 des Abgaberohres 24 mündet in einen sich in Transportrichtung T verjüngenden, zweiten Teilabschnitt 30, (kurz "Trichter" genannt), welcher in den Transportkanal 26 mündet.As in particular in the partial view of Fig. 2 can be seen, the discharge pipe 24 is provided on its first portion 28 with a constant cross-section whose width B corresponds approximately to the length of the opening roller 4. The section 28 of the discharge pipe 24 opens into a in the transport direction T tapered, second section 30 (called "hopper"), which opens into the transport channel 26.

Im Bereich des ersten Teilabschnittes 28 sind kurz hinter der Abgabeöffnung 20 zum Beispiel jeweils paarweise zwei gegenüberliegende CCD-Kameras 32, 32' und 33, 33' angebracht, welche durch jeweils ein transparentes Fenster 35, 36, die im Teilabschnitt 28 integriert sind, das von der Reinigungsstufe 1 abgegebene Fasermaterial überwachen.In the region of the first subsection 28, for example, two opposite CCD cameras 32, 32 'and 33, 33' are mounted in pairs behind the dispensing opening 20, each of which is integrated with a transparent window 35, 36 which is integrated in the subsection 28 Monitoring the output of the cleaning stage 1 fiber material.

Im Teilabschnitt 28 sind ausserdem Hintergrundstreifen 38 angebracht, welche zu der jeweiligen Kamera 32, 32' und 33, 33' auf der gegenüberliegenden Seite des Kanals positioniert sind. Dabei entspricht die Farbe des Hintergrundstreifens 38 den eingestellten Parametern für die Fasern, so dass die Kameras bei leerem Teilabschnitt 28 nicht ansprechen. Eine ähnliche Vorrichtung ist zum Beispiel aus der WO-96/35831 zu entnehmen.In the section 28 are also attached background strips 38, which are positioned to the respective camera 32, 32 'and 33, 33' on the opposite side of the channel. The color of the background strip 38 corresponds to the set parameters for the fibers, so that the cameras do not respond when the partial section 28 is empty. A similar device is for example from WO-96/35831 refer to.

Wie insbesondere aus Fig. 2 ersichtlich ist, sind den jeweiligen Kameras32-33' Beleuchtungskörper 40 zugeordnet, die für eine ausreichende Beleuchtung des an den Kameras vorbeigeführten Fasergutes sorgen.As in particular from Fig. 2 it can be seen, the respective cameras 32-33 'lighting fixture 40 are assigned, which provide sufficient illumination of the guided past the cameras fiber material.

Wie ebenfalls in Fig. 2 schematisch angedeutet, sind die Kameras 32-33' über die Pfade 42, 42', 43 und 43' mit einer Steuereinheit ST verbunden, über welche die Überwachungsresultate der Steuereinheit ST übermittelt werden. Anhand der Auswertung der an die Steuereinheit ST übermittelten Daten wird über die Steuerleitung 45 ein entsprechendes Ventil 48 geöffnet, wobei die über eine Druckluftquelle 46 gelieferte Druckluft zu einer dem jeweiligen Ventil 48 zugeordneten Ausblasdüse 50 freigeschaltet wird. Über den dadurch entstehenden Luftimpuls P wird detektiertes Fremdmaterial (zum Beispiel Fremdfasern) über eine Öffnung 52 an einen Behälter 54 abgegeben. Der Behälter 54 kann dabei geschlossen oder mit entsprechenden Öffnungen mit der Atmosphäre verbunden sein. Es ist auch möglich, den Behälter 54 mit entsprechenden Absaugeinrichtungen zum Entfernen des abgeschiedenen Materials zu versehen. Wie gestrichelt dargestellt, kann der Behälter auch mit einer Luftrückführung 55 versehen sein, über welche die dem Behälter zugeführte Luft in den Teilabschnitt 30 zurückgeführt wird.Like also in Fig. 2 indicated schematically, the cameras 32-33 'via the paths 42, 42', 43 and 43 'connected to a control unit ST, via which the monitoring results of the control unit ST are transmitted. On the basis of the evaluation of the data transmitted to the control unit ST, a corresponding valve 48 is opened via the control line 45, wherein the compressed air supplied via a compressed air source 46 is released to a blower nozzle 50 assigned to the respective valve 48. About the resulting air pulse P detected foreign material (for example, foreign fibers) is discharged through an opening 52 to a container 54. The container 54 may be closed or connected to the atmosphere with corresponding openings. It is also possible to provide the container 54 with corresponding suction means for removing the deposited material. As shown in dashed lines, the container may also be provided with an air return 55, via which the air supplied to the container is returned to the section 30.

Es ist auch eine Ausführung möglich, wobei die Blasdüsen 50 unterhalb des Abgaberohres 24 angeordnet sein können, wobei die detektierten Fremdteile nach oben durch eine entsprechende Öffnung im Rohr 24 ausgeblasen werden. Bei einer derartigen Anordnung muss der Auffangbehälter entsprechend ausgebildet, bzw. angeordnet sein, damit die ausgeschiedenen Fremdteile nicht wieder zurück in den Kanal 24 gelangen können.It is also an embodiment possible, wherein the blowing nozzles 50 may be disposed below the discharge pipe 24, wherein the detected foreign parts are blown up through a corresponding opening in the pipe 24. In such an arrangement, the collecting container must be designed or arranged accordingly, so that the excreted foreign parts can not get back into the channel 24.

Es ist auch denkbar, das Fasergut noch vor Erreichen der Überwachungseinrichtung (32-33') im Bereich der Abgabeöffnung 20 chemisch zu behandeln, so dass auch solche Fremdteile, wie zum Beispiel Kunststoff-Folien, die sich normalerweise nicht von der Farbe der Baumwolle unterscheiden, für das Überwachungssystem sichtbar gemacht werden. (z. B. über UV-Licht, wenn die aufgesprühte chemische Substanz nur an den Kunststofffolien haften bleibt und über UV-Licht sichtbar gemacht werden kann.) Mit der im Anschluss an die Reinigungsstufe 1 angeordnete Erkennungs- und AbscheideEinrichtung werden insbesondere die Fremdteile erfasst und abgeschieden, welche aufgrund ihrer physikalischen Kenngrössen nicht über die Fliehkrafteinwirkung bei der konventionellen Reinigungsstufe 1 abgeschieden werden können.It is also conceivable to chemically treat the fiber material even before reaching the monitoring device (32-33 ') in the region of the dispensing opening 20, so that even extraneous parts, such as plastic films, which do not normally differ from the color of the cotton , made visible to the monitoring system. (For example, via UV light, when the sprayed chemical substance adheres only to the plastic films and can be made visible via UV light.) With the detection and separation device arranged after the purification stage 1, the foreign parts are detected in particular and deposited, which can not be deposited via the centrifugal force effect in the conventional purification stage 1 due to their physical characteristics.

Der Einsatz einer derartigen Reinigungsstufe mit erfindungsgemäss beanspruchter, direkt nachfolgender Erkennungs- und Ausscheidevorrichtung kann in der Putzereilinie an irgendeiner Stelle zwischen der Ballenabtragsmaschine und den Karden eingesetzt werden.The use of such a cleaning stage with claimed according to the invention, directly subsequent recognition and separation device can be used in the cleaning line at any point between the Ballenabtragsmaschine and the cards.

Claims (4)

  1. A device for the recognition and separation of foreign matter from a fibre material, which is delivered via feed elements (14, 15) to a cleaning stage (1), in which the fibre material is guided by means of an opener roller (4) via one or more separation means (5) and discharged to a downstream delivery channel (26), wherein the discharge area (20, 24) of the cleaning device (1), seen in the conveying direction (F), exhibits a channel (24) which exhibits a constant cross-section over at least a part section (28) of its length, and wherein the recognition and separation device (32, 33, 50) is located in the area (28) of the constant cross-section of the channel (24), wherein the recognition and separation device (32, 33, 50) for foreign matter is arranged directly in the discharge area (20, 24) of the cleaning stage (1), namely directly next to the discharge opening of the cleaning stage or in the area directly subsequent to said discharge opening, characterised in that said channel (24) tapers in funnel fashion at least in its front part (30), with which it opens into the conveying channel (26), and that in the discharge area (20, 24) a channel (22) for air supply (L) is allocated in the conveying direction (F), wherein the air (L) is guidable in the channel (22) for air supply into the tangential direction towards the opener roller (4) in such a way that the air is supporting the process of releasing the fibre material out of the clothing (7) of the opener roller.
  2. The device according to claim 1, characterised in that the sensor system is formed from one or more cameras (32, 32', 33, 33').
  3. The device according to claim 2, characterised in that a lighting device (40) is allocated to the sensor system.
  4. The device according to one of claims 1 to 3, characterised in that the separation device is formed from blower nozzles (50) arranged next to one another, which can be actuated in sequence by means of the sensor system (32, 32', 33, 33') via a control unit (ST).
EP02711730.8A 2001-02-16 2002-02-15 Separating device for foreign bodies Expired - Lifetime EP1360351B2 (en)

Priority Applications (2)

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EP02711730.8A EP1360351B2 (en) 2001-02-16 2002-02-15 Separating device for foreign bodies
EP08154583A EP1959039A3 (en) 2001-02-16 2002-02-15 Separating device for foreign material

Applications Claiming Priority (6)

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EP01810153 2001-02-16
EP01810153A EP1233086A1 (en) 2001-02-16 2001-02-16 Method and apparatus for the detection and removal of foreign matter from fibre material, especially raw cotton
CH6522001 2001-04-06
CH652012001 2001-04-06
PCT/CH2002/000095 WO2002066717A1 (en) 2001-02-16 2002-02-15 Separating device for foreign bodies
EP02711730.8A EP1360351B2 (en) 2001-02-16 2002-02-15 Separating device for foreign bodies

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CH699123B1 (en) * 2008-07-03 2013-07-15 Truetzschler Gmbh & Co Kg Apparatus for use in spinning preparation or Ginnerei for detecting foreign parts in plastic.
DE102008031199B4 (en) * 2008-07-03 2024-06-13 Trützschler Group SE Device in spinning preparation, ginning or similar for detecting foreign parts made of plastic, such as polypropylene or similar.
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DE102010055523A1 (en) * 2010-12-22 2012-06-28 Trützschler GmbH & Co Kommanditgesellschaft Apparatus in the spinning preparation for the detection of foreign parts made of plastic, such as polypropylene tapes, fabrics and films u. like.
CN103726138A (en) * 2012-10-12 2014-04-16 山东顺兴机械有限公司 Fiber carding machine with metal removing function
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EP1360351B1 (en) 2008-12-31
EP1959039A2 (en) 2008-08-20
CN1511201A (en) 2004-07-07
DE50213163D1 (en) 2009-02-12
WO2002066717A1 (en) 2002-08-29
EP1360351A1 (en) 2003-11-12
CN100507103C (en) 2009-07-01
EP1959039A3 (en) 2009-05-27

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