EP0989214B1 - Method and apparatus for removing foreign substances from fiber material, especially from raw cotton - Google Patents
Method and apparatus for removing foreign substances from fiber material, especially from raw cotton Download PDFInfo
- Publication number
- EP0989214B1 EP0989214B1 EP19980810885 EP98810885A EP0989214B1 EP 0989214 B1 EP0989214 B1 EP 0989214B1 EP 19980810885 EP19980810885 EP 19980810885 EP 98810885 A EP98810885 A EP 98810885A EP 0989214 B1 EP0989214 B1 EP 0989214B1
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- Prior art keywords
- air
- separation container
- accordance
- separation
- fibre
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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
- 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 method for eliminating Foreign matter in fiber material, especially in raw cotton according to the preamble of claim 1.
- Such methods are used, for example, in the blow room of a spinning mill, to prepare the raw cotton for the spinning process. In doing so, we will postpone as early as possible foreign fibers such as e.g. cords, Jute scraps etc., but also plastic films and the like more eliminated.
- the in the waste container still air displaced by the newly introduced air mass and flows back through the discharge opening into the fiber transport channel.
- the violent turbulence that arises impurities can be whirled up and get so back into the fiber transport line.
- the Compressed air pulse disturbed by the onset of backflow.
- WO 89/01832 already addresses the problem of turbulence indicated in the waste container. To avoid Whirling up is suggested to the excretion container to train so large that the gas pressure pulse disperse triggered currents and turbulence can without affecting the material flow. So that can the problem is not solved satisfactorily and in the limited space in a blow room it is not desirable without large volume imperative Install components.
- DE U 296 04 552 proposes that by the To redirect air pressure pulse triggered air flow and again to feed the fiber transport line.
- a further opening is arranged at a distance from the discharge opening, which continuously separates the waste container with the fiber transport line combines.
- Such a permanent connection at an additional point does not work easily removing air from the separation container, because the pressure conditions are about the same everywhere.
- the displaced air is only over part of the channel width about the next way, namely through the opening in flow back the transport channel.
- the volume of the separation tank is enlarged or if through an air vent air is extracted from the separation tank.
- air flowing in during the separation process increases the volume of the waste container and in the second case, air comes out of the waste container deducted.
- this measure is controlled and depending on an actual elimination process.
- the fiber transport line is in normal operation only in terms of pressure via the discharge opening connected to the waste container.
- An air conveyor can be operated to extract the air, which a largely predeterminable amount of air from the separation container promotes.
- Such air conveyors or injectors have a high capacity and it would be easy conceivable, in the short term at least as much air from the separation tank aspirate than by the compressed air pulse is fed.
- the air extracted from the separation container could enter the Fiber transport line are returned. Because the derivative at a targeted time, but it would also be easily conceivable to vent the air into a discharge line conduct or vent into the atmosphere. It is there conceivable to temporarily extract the air from the waste container connect to a vacuum source, e.g. on a dedusting system.
- the means to increase the volume or to subtract the Air is passed through the sensor system via a suitable control device driven.
- Can on the control device various parameters, in particular duration and amount of Air discharge can be set.
- a fiber transport line 1 in the conveying direction a is on a fiber transport line 1 in the conveying direction a, one behind the other, a sensor system 2 and a separation device 5 is arranged.
- the sensor system 2 has, for example, two color line cameras 4, 4 ', which are diametrically opposite and offset the fiber transport line are arranged and which by Windows 3, 3 'act on the transported fiber material.
- the separating device 5 arranged downstream has via at least one compressed air nozzle 6, which is transverse to the fiber transport line 1 is arranged or acts. Opposite the A discharge opening 7 is arranged in the compressed air nozzle leads to a separation container 8.
- the cameras 4, 4 'and the compressed air nozzle 6 are operatively connected to a control device 12. If the sensor system 2 detects a foreign substance, for example a colored film strip, the Compressed air nozzle 6 controlled so that it is in the correct Triggers a pulse of compressed air in the direction of arrow b, the contaminated subset of the fibers through the opening 7 is deflected into the separating container 8.
- baffles 10 to the To influence flow. From the opposite of the atmosphere largely pressure-tight separation container 8 can contaminated fibers permanently or at certain intervals can be removed via a lock 9.
- the arrangement described above also applies to the rest Embodiments too.
- Modifications to the sensor system or the separating device possible.
- the fiber transport line does not necessarily have to run horizontally or the waste container does not necessarily have to be under the fiber transport line be arranged.
- Air extraction opening 11 arranged, which preferably with a sieve 13 is covered.
- the air vent leads to a derivative 20, which the separating tank 8 with a Vacuum source 29 connects.
- this derivative there is one Flap 14 arranged, which is actuated via a flap drive 15 can be. This is also in operative connection with the control device 12, so that simultaneously with the Activating the compressed air nozzle 6 also opens the flap 14 becomes.
- Air from the separating container 8 is in the direction of the arrow c deducted until the flap 14 preferably with a time delay compared to the compressed air pulse is closed.
- the exemplary embodiment according to FIG. 2 basically shows the same principle of operation, but alternative means to controlled extraction of air.
- the air vent 11 am Excretion container 8 can be in the normal operating state be closed with a check valve 21.
- the air vent also leads to a return line 16, which in turn separates the container 8 with the fiber transport line combines. But as indicated, it would also be conceivable the connection with a derivative 20.
- Air to be discharged from the separating container 8 becomes a Air conveyor or injector 17 actuated. This is about one Valve 19 connected to a compressed air line 18.
- the Valve 19 receives control signals from control device 12, by opening the valve a suction effect in the direction of the arrow c is achieved.
- control device 12 For extracting air from the waste container other suitable means such as fans, etc. are used, with occasionally also a controlled one It may be necessary to close the air vent can.
- FIG. 3 shows a variant in which the volume is only temporary of the separation container 8 is enlarged.
- a movable wall section 23 is provided, which in Arrow direction d can be moved and that with the rest Housing of the separating container 8 via a bellows 24 is connected pressure-tight.
- a pneumatic section 25 serves over a wall section
- Valve 27 is connected to a compressed air line 26.
- the movable wall section becomes a vented pneumatic cylinder 23 into the starting position by means of a compression spring 28 pressed back.
- the valve 27 is controlled by the control device 12 controlled, the pneumatic cylinder 25 activated and the movable wall section 23 suddenly is withdrawn.
- the resulting volume increase compensates for the inflowing air volume.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Ausscheiden von Fremdstoffen in Fasermaterial, insbesondere in Rohbaumwolle gemäss dem Oberbegriff von Anspruch 1. Derartige Verfahren werden beispielsweise in der Putzerei einer Spinnerei eingesetzt, um die Rohbaumwolle für den Spinnprozess vorzubereiten. Dabei werden zu einem möglichst frühen Zeitpunkt nach dem Öffnen der Baumwollballen fremde Fasern wie z.B. Schnüre, Jutefetzen usw., aber auch Kunststofffolien und dergleichen mehr ausgeschieden.The invention relates to a method for eliminating Foreign matter in fiber material, especially in raw cotton according to the preamble of claim 1. Such methods are used, for example, in the blow room of a spinning mill, to prepare the raw cotton for the spinning process. In doing so, we will postpone as early as possible foreign fibers such as e.g. cords, Jute scraps etc., but also plastic films and the like more eliminated.
Gattungsmässig vergleichbare Verfahren sind beispielsweise durch die WO 89/01832 oder die DE U 296 04 552 bekannt geworden. Ersichtlicherweise werden dabei die Strömungsverhältnisse in der Fasertransportleitung so gewählt, dass bei Normalbetrieb keine Fasern in den Ausscheidebehälter gelangen können. Erst beim Erkennen eines Fremdstoffes durch das Sensorsystem wird die Ausscheidevorrichtung aktiviert und die verunreinigte Teilmenge der Baumwollfasern wird durch den Druckluftimpuls aus der normalen Förderrichtung in den Ausscheidebehälter umgelenkt. Ein Problem besteht allerdings darin, dass durch den Druckluftimpuls in einer kurzen Zeitspanne eine grosse Luftmenge in den Ausscheidebehälter geblasen wird. Dieser muss jedoch gegenüber der Atmosphäre weitgehend druckdicht ausgebildet sein, um die Strömungsverhältnisse in der Fasertransportleitung nicht zu beeinträchtigen. Unter diesen Voraussetzungen wird die im Ausscheidebehälter ruhende Luft durch die neu zugeführte Luftmasse verdrängt und strömt durch die Ausscheideöffnung zurück in den Fasertransportkanal. Infolge der dabei entstehenden heftigen Turbulenzen können Verunreinigungen aufgewirbelt werden und gelangen so wieder in die Fasertransportleitung. Ausserdem wird der Druckluftimpuls durch die einsetzende Rückströmung gestört.Methods which are comparable in terms of type are, for example made known by WO 89/01832 or DE U 296 04 552. The flow conditions are evident selected in the fiber transport line so that at During normal operation, no fibers get into the waste container can. Only when a foreign substance is recognized by the The separation system is activated and the sensor system contaminated part of the cotton fibers is caused by the Compressed air pulse from the normal conveying direction into the separation tank diverted. However, there is a problem in that by the compressed air pulse in a short period of time a large amount of air is blown into the separation tank becomes. However, this must largely be compared to the atmosphere be designed pressure-tight to the flow conditions not to be impaired in the fiber transport line. Under these conditions, the in the waste container still air displaced by the newly introduced air mass and flows back through the discharge opening into the fiber transport channel. As a result of the violent turbulence that arises impurities can be whirled up and get so back into the fiber transport line. In addition, the Compressed air pulse disturbed by the onset of backflow.
In der WO 89/01832 wird bereits auf das Problem der Turbulenzen im Ausscheidebehälter hingewiesen. Zur Vermeidung von Aufwirbelungen wird vorgeschlagen, den Ausscheidebehälter derart gross auszubilden, dass sich die mit dem Gasdruckimpuls ausgelösten Strömungen und Turbulenzen zerstreuen können, ohne den Materialstrom zu beeinträchtigen. Damit kann das Problem aber nicht zufriedenstellend gelöst werden und bei den beschränkten Platzverhältnissen in einer Putzerei ist es nicht wünschenswert, ohne zwingende Notwendigkeit grossvolumige Komponenten einzubauen.WO 89/01832 already addresses the problem of turbulence indicated in the waste container. To avoid Whirling up is suggested to the excretion container to train so large that the gas pressure pulse disperse triggered currents and turbulence can without affecting the material flow. So that can the problem is not solved satisfactorily and in the limited space in a blow room it is not desirable without large volume imperative Install components.
In der DE U 296 04 552 wird vorgeschlagen, den durch den Luftdruckimpuls ausgelösten Luftstrom umzulenken und wieder der Fasertransportleitung zuzuführen. Zu diesem Zweck ist im Abstand zur Ausscheideöffnung eine weitere Öffnung angeordnet, welche den Ausscheidebehälter dauernd mit der Fasertransportleitung verbindet. Eine derartige permanente Verbindung an einer zusätzlichen Stelle bewirkt jedoch nicht ohne weiteres ein Abführen von Luft aus dem Ausscheidebehälter, weil die Druckverhältnisse überall etwa gleich sind. Insbesondere bei selektivem Ausblasen von Verunreinigungen nur über einen Teil der Kanalbreite wird die verdrängte Luft über den nächsten Weg, nämlich über die Ausscheideöffnung in den Transportkanal zurückströmen.DE U 296 04 552 proposes that by the To redirect air pressure pulse triggered air flow and again to feed the fiber transport line. For this purpose, in A further opening is arranged at a distance from the discharge opening, which continuously separates the waste container with the fiber transport line combines. Such a permanent connection at an additional point, however, does not work easily removing air from the separation container, because the pressure conditions are about the same everywhere. Especially when selectively blowing out impurities The displaced air is only over part of the channel width about the next way, namely through the opening in flow back the transport channel.
Es ist daher eine Aufgabe der Erfindung, ein Verfahren der Eingangs genannten Art zu schaffen, bei dem Aufwirbelungen im Ausscheidebehälter und ein Rückströmen von Luft durch die Ausscheideöffnung zuverlässig vermieden werden. Ausserdem sollen steuerungstechnische Massnahmen möglich sein, um den Ausscheidevorgang jeweils den spezifischen Verhältnissen anzupassen. Diese Aufgabe wird erfindungsgemäss mit einem Verfahren gelöst, dass die Merkmale im Anspruch 1 aufweist. It is therefore an object of the invention to provide a method of To create the type mentioned, in the whirling in Excretion container and a backflow of air through the Discharge opening can be reliably avoided. Furthermore Control measures should be possible to Elimination process according to the specific circumstances adapt. This object is achieved with a Method solved that has the features in claim 1.
Ersichtlicherweise genügt es, wenn wenigstens während der Dauer des Luftdruckimpulses das Volumen des Ausscheidebehälters vergrössert wird oder wenn über eine Luftabzugsöffnung am Ausscheidebehälter Luft abgezogen wird. Im ersten Fall wird für die beim Ausscheidevorgang einströmende Luft vorübergehend das Volumen des Ausscheidebehälters vergrössert und im zweiten Fall wird Luft aus dem Ausscheidebehälter abgezogen. In beiden Fällen ist diese Massnahme jedoch gesteuert und jeweils abhängig von einem tatsächlichen Ausscheidevorgang. Beim Normalbetrieb ist die Fasertransportleitung nur gerade über die Ausscheideöffnung druckmässig mit dem Ausscheidebehälter verbunden.Obviously it is sufficient if at least during the Duration of the air pressure pulse is the volume of the separation tank is enlarged or if through an air vent air is extracted from the separation tank. In the first case becomes temporary for the air flowing in during the separation process increases the volume of the waste container and in the second case, air comes out of the waste container deducted. In both cases, however, this measure is controlled and depending on an actual elimination process. The fiber transport line is in normal operation only in terms of pressure via the discharge opening connected to the waste container.
Zum Abziehen der Luft kann ein Luftförderer betätigt werden, der eine weitgehend vorbestimmbare Luftmenge aus dem Ausscheidebehälter fördert. Derartige Luftförderer oder Injektoren haben eine hohe Förderleistung und es wäre ohne weiteres denkbar, kurzfristig mindestens so viel Luft aus dem Ausscheidebehälter abzusaugen, als durch den Druckluftimpuls zugeführt wird.An air conveyor can be operated to extract the air, which a largely predeterminable amount of air from the separation container promotes. Such air conveyors or injectors have a high capacity and it would be easy conceivable, in the short term at least as much air from the separation tank aspirate than by the compressed air pulse is fed.
Die aus dem Ausscheidebehälter abgezogene Luft könnte in die Fasertransportleitung zurückgeführt werden. Weil die Ableitung zu einem gezielten Zeitpunkt erfolgt, wäre es aber auch ohne weiteres denkbar, die Luft in eine Abgangsleitung zu leiten oder in die Atmosphäre zu entlüften. Es ist dabei denkbar, zum Abziehen der Luft den Ausscheidebehälter vorübergehend an eine Unterdruckquelle anzuschliessen, z.B. an eine Entstaubungsanlage.The air extracted from the separation container could enter the Fiber transport line are returned. Because the derivative at a targeted time, but it would also be easily conceivable to vent the air into a discharge line conduct or vent into the atmosphere. It is there conceivable to temporarily extract the air from the waste container connect to a vacuum source, e.g. on a dedusting system.
Die Mittel zum Vergrössern des Volumens oder zum Abziehen der Luft werden durch das Sensorsystem über eine geeignete Steuervorrichtung angesteuert. An der Steuervorrichtung können verschiedene Parameter, insbesondere Dauer und Menge der Luftableitung eingestellt werden. Dabei kann es insbesondere auch vorteilhaft sein, wenn das Abziehen der Luft über die Dauer des Luftdruckimpulses hinaus aufrechterhalten wird, bis bestehende Turbulenzen abgeklungen sind.The means to increase the volume or to subtract the Air is passed through the sensor system via a suitable control device driven. Can on the control device various parameters, in particular duration and amount of Air discharge can be set. In particular, it can also be advantageous if the extraction of air via the Duration of the air pressure pulse is maintained until existing turbulence has subsided.
Die Erfindung betrifft auch eine Vorrichtung zum Ausscheiden von Fremdstoffen in Fasermaterial mit den Merkmalen von Anspruch 8. Weitere Vorteile und Einzelmerkmale der Erfindung ergeben sich aus der nachstehenden Beschreibung von Ausführungsbeispielen und aus den Zeichnungen. Es zeigen:
- Figur 1
- eine schematische Darstellung einer Vorrichtung mit einer gesteuerten Klappe zur Freigabe der Luftabzugsöffnung und mit einer Unterdruckquelle,
Figur 2- eine schematische Darstellung einer Vorrichtung mit einem gesteuerten Luftförderer und
Figur 3- eine schematische Darstellung einer Vorrichtung mit verstellbarem Volumen des Ausscheidebehälters.
- Figure 1
- 1 shows a schematic representation of a device with a controlled flap for opening the air extraction opening and with a vacuum source,
- Figure 2
- is a schematic representation of a device with a controlled air conveyor and
- Figure 3
- a schematic representation of a device with an adjustable volume of the separating container.
Wie in Figur 1 dargestellt, ist an einer Fasertransportleitung
1 in Förderrichtung a hintereinander ein Sensorsystem 2
und eine Ausscheidevorrichtung 5 angeordnet. Das Sensorsystem
2 verfügt beispielsweise über zwei Farbzeilenkameras 4, 4',
welche einander diametral gegenüberliegend und versetzt an
der Fasertransportleitung angeordnet sind und welche durch
Fenster 3, 3' das transportierte Fasermaterial beaufschlagen.As shown in Figure 1, is on a fiber transport line
1 in the conveying direction a, one behind the other, a
Die stromabwärts angeordnete Ausscheidevorrichtung 5 verfügt
über wenigstens eine Druckluftdüse 6, welche quer zur Fasertransportleitung
1 angeordnet ist bzw. wirkt. Gegenüber der
Druckluftdüse ist eine Ausscheideöffnung 7 angeordnet, welche
zu einem Ausscheidebehälter 8 führt. Die Kameras 4, 4' und
die Druckluftdüse 6 stehen in Wirkverbindung mit einer Steuervorrichtung
12. Ermittelt das Sensorsystem 2 einen Fremdstoff,
beispielsweise einen farbigen Folienstreifen, wird die
Druckluftdüse 6 derart angesteuert, dass sie im richtigen
Zeitpunkt einen Druckluftimpuls in Pfeilrichtung b auslöst,
wobei die verunreinigte Teilmenge der Fasern durch die Öffnung
7 in den Ausscheidebehälter 8 abgelenkt wird. Im Ausscheidebehälter
können Leitbleche 10 angeordnet sein, um die
Strömung zu beeinflussen. Aus dem gegenüber der Atmosphäre
weitgehend druckdichten Ausscheidebehälter 8 können die
verunreinigten Fasern permanent oder in bestimmten Abständen
über eine Schleuse 9 entfernt werden.The separating
Die oben beschriebene Anordnung trifft auch für die übrigen Ausführungsbeispiele zu. Selbstverständlich sind dabei verschiedene Abwandlungen am Sensorsystem oder an der Ausscheidevorrichtung möglich. Insbesondere können bezogen auf die Breite der Fasertransportleitung mehrere separat ansteuerbare Druckluftdüsen vorgesehen sein. Die Fasertransportleitung muss auch nicht zwingend horizontal verlaufen bzw. der Ausscheidebehälter muss nicht zwingend unter der Fasertransportleitung angeordnet sein.The arrangement described above also applies to the rest Embodiments too. Of course there are different ones Modifications to the sensor system or the separating device possible. In particular, based on the Width of the fiber transport line several separately controllable Compressed air nozzles can be provided. The fiber transport line does not necessarily have to run horizontally or the waste container does not necessarily have to be under the fiber transport line be arranged.
Am Ausscheidebehälter 8 ist an einer geeigneten Stelle eine
Luftabzugsöffnung 11 angeordnet, welche vorzugsweise mit
einem Sieb 13 abgedeckt ist. Die Luftabzugsöffnung führt zu
einer Ableitung 20, welche den Ausscheidebehälter 8 mit einer
Unterdruckquelle 29 verbindet. In dieser Ableitung ist eine
Klappe 14 angeordnet, die über einen Klappenantrieb 15 betätigt
werden kann. Dieser steht ebenfalls in Wirkverbindung
mit der Steuervorrichtung 12, so dass gleichzeitig mit dem
Aktivieren der Druckluftdüse 6 auch die Klappe 14 geöffnet
wird. Dabei wird Luft aus dem Ausscheidebehälter 8 in Pfeilrichtung
c abgezogen, bis die Klappe 14 vorzugsweise mit
einer Zeitverzögerung gegenüber dem Druckluftimpuls wieder
geschlossen wird.On the
Das Ausführungsbeispiel gemäss Figur 2 zeigt grundsätzlich
das gleiche Funktionsprinzip, jedoch alternative Mittel zum
gesteuerten Abziehen der Luft. Die Luftabzugsöffnung 11 am
Ausscheidebehälter 8 kann dabei im normalen Betriebszustand
mit einer Rückschlagklappe 21 verschlossen sein. Die Luftabzugsöffnung
führt ausserdem zu einer Rückführleitung 16,
welche den Ausscheidebehälter 8 wiederum mit der Fasertransportleitung
verbindet. Denkbar wäre aber wie angedeutet auch
die Verbindung mit einer Ableitung 20.The exemplary embodiment according to FIG. 2 basically shows
the same principle of operation, but alternative means to
controlled extraction of air. The
Um beim Auslösen eines Druckluftimpulses an der Druckluftdüse
6 Luft aus dem Ausscheidebehälter 8 abzufördern, wird ein
Luftförderer oder Injektor 17 betätigt. Dieser ist über ein
Ventil 19 an eine Druckluftleitung 18 angeschlossen. Das
Ventil 19 erhält Steuersignale von der Steuervorrichtung 12,
wobei durch Öffnen des Ventils eine Sogwirkung in Pfeilrichtung
c erzielt wird. Zum Abziehen von Luft aus dem Ausscheidebehälter
könnten auch andere geeignete Mittel wie Ventilatoren,
usw. eingesetzt werden, wobei fallweise auch ein gesteuertes
Verschliessen der Luftabzugsöffnung nötig sein
kann.To trigger a compressed air pulse at the
Schliesslich zeigt das Ausführungsbeispiel gemäss Figur 3
eine Variante, bei der lediglich vorübergehend das Volumen
des Ausscheidebehälters 8 vergrössert wird. Zu diesem Zweck
ist ein beweglicher Wandabschnitt 23 vorgesehen, der in
Pfeilrichtung d bewegt werden kann und der mit dem übrigen
Gehäuse des Ausscheidebehälters 8 über einen Faltenbalg 24
druckdicht verbunden ist. Zur Betätigung des beweglichen
Wandabschnitts dient ein Pneumatikzylinder 25, der über ein
Ventil 27 an eine Druckluftleitung 26 angeschlossen ist. Bei
entlüftetem Pneumatikzylinder wird der bewegliche Wandabschnitt
23 mittels einer Druckfeder 28 in die Ausgangsstellung
zurückgepresst. Das Ventil 27 wird durch die Steuervorrichtung
12 angesteuert, wobei der Pneumatikzylinder 25 aktiviert
wird und der bewegliche Wandabschnitt 23 schlagartig
zurückgezogen wird. Die damit bewirkte Volumenvergrösserung
kompensiert das einströmende Lunftvolumen. Nach dem Ausscheidevorgang
wird der Pneumatikzylinder 25 sofort wieder entlüftet
und der bewegliche Wandabschnitt 23 wird langsam in seine
Grundstellung zurückgeschoben. Dabei wird ersichtlicherweise
die vorher schnell eingeleitete Luftmenge langsam wieder
verdrängt und durch die Ausscheideöffnung 7 in die Fasertransportleitung
1 zurückgeführt. Dies erfolgt aber derart
langsam, dass eine Aufwirbelung oder Rückströmung der verunreinigten
Fasern nicht möglich ist.Finally, the exemplary embodiment according to FIG. 3 shows
a variant in which the volume is only temporary
of the
Claims (14)
- Method for separating out foreign substances in fibre material, in particular in raw cotton, wherein the fibre material is guided in a pneumatic fibre transportation conduit (1) past a sensor system (2) and a separation device (5), one behind the other, and wherein on detection of foreign substances by the sensor system, the contaminated portion of the fibre material is deflected, by means of an air pressure pulse directed crosswise to the direction of fibre transportation, into a separation container (8) which is arranged in the fibre transportation conduit and is connected to it via an aperture (7), and which is designed to be largely pressure-tight,
characterised in that
at least for the duration of the compressed air pulse, either the volume of the separation container (8) is enlarged, or air is drawn off via an air withdrawal aperture (11) on the separation container. - Method in accordance with claim 1, characterised in that for withdrawing air, an air conveyor (17) is actuated, which conveys an amount of air out of the separation container.
- Method in accordance with claim 1 or 2, characterised in that the air withdrawn from the separation container (8) is led back into the fibre transportation conduit (1).
- Method in accordance with claim 1 or 2, characterised in that the air withdrawn from the separation container is guided into an exit conduit (20).
- Method in accordance with claim 1, characterised in that for extracting the air, the separation container is temporarily connected to a negative pressure source.
- Method in accordance with one of the claims 1 to 5, characterised in that the means for increasing the volume or extracting the air are triggered by the sensor system (2).
- Method in accordance with one of the claims 1 to 6, characterised in that the extraction of air is maintained beyond the duration of the air pressure pulse.
- Device for separating out foreign substances in fibre material, in particular in raw cotton, with a pneumatic fibre transportation conduit (1), arranged on which, behind one another, is a sensor system (2) for detecting foreign substances, and a separation device (5) with at least one air pressure jet (6) which acts crosswise to the direction of fibre transportation, wherein opposite the compressed air jet, the fibre transportation conduit has an aperture (7) which leads to a separation container (8) that is largely pressure-tight,
characterised in that
the separation container (8) has either means (22) for temporarily increasing its volume, or means (14, 21) for temporary extraction of air from the separation container (8), for compensating the quantity of air that is blown into the separation container in the event of a separation procedure. - Device in accordance with claim 8, characterised in that connected to the separation container (8) is an air conveyor (17), with which a quantity of air can be conveyed out of the separation container.
- Device in accordance with claim 8 or 9, characterised in that via the air conveyor (17), the separation container is short-circuited with the fibre transportation conduit (1).
- Device in accordance with claim 8 or 9, characterised in that the separation container is connected via the air conveyor to an exit conduit (20).
- Device in accordance with claim 8, characterised in that the separation container (8) is connected to a negative pressure source via a controllable shutoff device (15).
- Device in accordance with one of the claims 8 to 12, characterised in that the means can be activated with a control device (12) which is in effective connection with the sensor system (2).
- Device in accordance with one of the claims 8 to 13, characterised in that arranged in the separation container (8) is a baffle plate (10) for influencing the currents.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19980810885 EP0989214B1 (en) | 1998-09-07 | 1998-09-07 | Method and apparatus for removing foreign substances from fiber material, especially from raw cotton |
| DE59808078T DE59808078D1 (en) | 1998-09-07 | 1998-09-07 | Method and device for separating foreign substances in fiber material, in particular in raw cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19980810885 EP0989214B1 (en) | 1998-09-07 | 1998-09-07 | Method and apparatus for removing foreign substances from fiber material, especially from raw cotton |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0989214A1 EP0989214A1 (en) | 2000-03-29 |
| EP0989214B1 true EP0989214B1 (en) | 2003-04-23 |
Family
ID=8236302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19980810885 Expired - Lifetime EP0989214B1 (en) | 1998-09-07 | 1998-09-07 | Method and apparatus for removing foreign substances from fiber material, especially from raw cotton |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0989214B1 (en) |
| DE (1) | DE59808078D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736450A (en) * | 2008-11-19 | 2010-06-16 | 特鲁菲舍尔股份有限公司及两合公司 | Device for detecting and separating impurity in or between fiber materials on spinning preparation machine |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE50213163D1 (en) * | 2001-02-16 | 2009-02-12 | Jossi Holding Ag | SEPARATING DEVICE FOR FOREIGN MATERIALS |
| EP1234901A1 (en) * | 2001-02-22 | 2002-08-28 | Jossi Holding AG | Method and apparatus for the detection and removal of foreign matter from fibre material, especially raw cotton |
| DE10206609A1 (en) * | 2002-02-15 | 2003-08-28 | Rieter Ag Maschf | Method and device on a card for the detection and removal of foreign substances in fiber material |
| DE10347006B4 (en) * | 2003-10-07 | 2020-10-15 | Hubert Hergeth | Hopper suction for foreign parts |
| ATE477357T1 (en) * | 2005-01-25 | 2010-08-15 | Jossi Holding Ag | METHOD AND DEVICE FOR EXCEPTION OF FOREIGN SUBSTANCES IN FIBER MATERIAL, IN PARTICULAR IN RAW COTTON |
| DE102005014898A1 (en) * | 2005-04-01 | 2006-10-05 | Hubert Hergeth | Unit for optical detection and elimination of foreign matter in pneumatically-conveyed cotton fibers, has sheet metal construction including camera chambers |
| DE102006047038A1 (en) * | 2006-10-02 | 2008-04-03 | Hergeth, Hubert | Device for removing foreign particles from fiber flakes in transport airflow, comprises sluice channel, where false airflow supports diverted foreign particles, beginning from start of sluice channel, to end of sluice funnel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735616B2 (en) * | 1990-02-26 | 1995-04-19 | フジディバイス株式会社 | Foreign matter removal device |
| DE4131188C2 (en) * | 1991-09-19 | 2002-08-14 | Truetzschler Gmbh & Co Kg | Device on a conveyor line for the pneumatic conveying of textile fibers, especially in spinning preparation |
| ATE193736T1 (en) * | 1995-05-12 | 2000-06-15 | Jossi Holding Ag | METHOD AND DEVICE FOR DETECTING AND EXCRETING FOREIGN SUBSTANCES IN FIBER MATERIAL |
| EP0879905A1 (en) * | 1997-05-20 | 1998-11-25 | Jossi Holding AG | Method and apparatus for the detection and removal of foreign substances in fibre material |
-
1998
- 1998-09-07 DE DE59808078T patent/DE59808078D1/en not_active Expired - Fee Related
- 1998-09-07 EP EP19980810885 patent/EP0989214B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736450A (en) * | 2008-11-19 | 2010-06-16 | 特鲁菲舍尔股份有限公司及两合公司 | Device for detecting and separating impurity in or between fiber materials on spinning preparation machine |
| CN101736450B (en) * | 2008-11-19 | 2014-06-04 | 特鲁菲舍尔股份有限公司及两合公司 | Device for detecting and separating impurity in or between fiber materials on spinning preparation machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59808078D1 (en) | 2003-05-28 |
| EP0989214A1 (en) | 2000-03-29 |
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