EP0379726B1 - Cleaning machine for textile fibres - Google Patents

Cleaning machine for textile fibres Download PDF

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Publication number
EP0379726B1
EP0379726B1 EP89123946A EP89123946A EP0379726B1 EP 0379726 B1 EP0379726 B1 EP 0379726B1 EP 89123946 A EP89123946 A EP 89123946A EP 89123946 A EP89123946 A EP 89123946A EP 0379726 B1 EP0379726 B1 EP 0379726B1
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EP
European Patent Office
Prior art keywords
air
cleaning machine
wall
fact
machine according
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EP89123946A
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German (de)
French (fr)
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EP0379726A1 (en
Inventor
René Schmid
Jürg Koller
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0379726A1 publication Critical patent/EP0379726A1/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
    • D01G9/04—Opening or cleaning fibres, e.g. scutching cotton by means of beater arms

Definitions

  • the invention relates to a cleaning machine for textile fibers transported in a conveying air stream, with a horizontal roller, equipped with impact elements, under the underside of which bar grids are arranged and over the top of which an inlet and the other end an outlet for the conveying air stream and at the other end of the roller delimited transfer chambers for the air flow rotating about the roller axis are arranged between the inlet and the outlet of guide plates inclined to the roller axis.
  • At least one such cleaning machine is known and available on the market. It serves to dissolve the fiber flakes supplied in the conveying air flow and to remove impurities from them.
  • the fiber material is dragged over the bar grates and also tapped to a certain extent by the impact on the walls delimiting the transfer chambers, as a result of which contaminants are released from the material.
  • Coarse contaminants e.g. Shell parts, pass through the bar grids and are then suctioned off. Fine, dust-like contaminants, however, remain in the known machines at least partially in the conveying air flow and then leave the machine together with the fiber material transported by the conveying air flow.
  • the object of the invention is to design the cleaning machine specified at the outset in such a way that it can largely separate even fine, dust-like impurities from the fiber material.
  • the object has been achieved according to the invention in that the transfer chambers are at least partially covered with an air- and dust-permeable wall over which at least one vacuum chamber connected to a suction line is formed by a hood is.
  • Air can be sucked out of the transfer chambers through the air- and dust-permeable wall of the transfer chambers, with which air the very light, dust-like dirt particles can be separated from the conveying air stream transporting the fiber material.
  • the air- and dust-permeable wall of the transfer chambers is, for example, a sieve or a perforated plate with holes of approximately 1.5 mm in diameter.
  • each transfer chamber - or possibly in one or some of the transfer chambers - it can form at least part of the cover.
  • the vacuum chamber can be assigned to all transfer chambers together; however, it is also possible to arrange separate vacuum chambers for each of the transfer chambers or for each of some of the transfer chambers.
  • Means are preferably provided for adjusting the negative pressure in the negative pressure chamber or the negative pressure chambers or the amount of air drawn off by them, e.g. an adjustable throttle valve in the suction line or between it and the vacuum chamber. If there are several separate vacuum chambers, each of them can also be assigned its own throttle element (flap, slide or the like).
  • the coarse cleaning machine shown in FIGS. 1 to 3 has an opening roller 1 which is rotatably mounted in a housing 2 about a horizontal axis and the circumference of which is occupied in the usual way with striking pins 3.
  • the roller 1 is rotated in operation by a drive motor, not shown, in the direction of the arrow in FIG. 1.
  • Two bar grids 4 and 5, which are only shown in FIG. 1, are arranged under the underside of the roller 1.
  • the top of the roller 1 is covered at a distance from the circumference of the roller with a wall, of which a horizontal, central section 6 and two laterally adjoining, approximately 45 ° inclined side sections 7 and 8 are permeable to air and dust.
  • the three wall sections 6, 7 and 8 are arranged like a terrace roof, that is to say in cross section approximately like three sides of an isosceles trapezoid, and two of the wall sections each form an angle ( ⁇ ) of approximately 135 °.
  • the wall sections 6, 7 and 8 are formed, for example, by a perforated plate with holes of approximately 1.5 mm in diameter or by a sieve.
  • An inlet line 9 opens into the wall section 7 at one end of the roller 1
  • an outlet line 10 opens into the wall section 8 at the other end of the roller 1.
  • a hood formed by an upper part 2a of the housing 2 delimits a vacuum chamber 14 above the wall with the wall sections 6, 7, 8, to which a suction line 15 is connected.
  • the coarse cleaning machine has flake-like textile fibers to be cleaned and dissolved supplied in a conveying air flow through the inlet line 9.
  • the conveying air with the fiber flakes essentially flows first around the underside of the rotating roller 1, then through the transfer chamber between the guide plates 11 and 12, which moves the air in the direction of the axis of the roller 1, then again around the underside of the roller, then through the transfer chamber between the guide plates 12 and 13 and again around the underside of the roller 1 to finally leave the machine through the outlet line 10.
  • the flakes of fiber are processed and increasingly dissolved by the striking pins 3, and impurities are separated from the fibers.
  • the coarser impurities such as shell parts, are separated through the rod grids 4 and 5 and sucked out of the space under the rod grids by a suction device, not shown. Thereafter, the fiber flakes fly upward into the next transfer chamber, where they are further loosened by hitting the wall sections 6, 7, 8. Fine, dust-like impurities which have been separated from the fibers can at most be partially sucked off through the bar grids 4 and 5, while a large part of the dust remains in the conveying air flow.
  • the air and dust-permeable wall sections 6, 7, 8, the vacuum chamber 14 and the suction line 15 serve to separate these fine impurities from the conveying air flow, so that they cannot end up with this and the fibers through the outlet line 10.
  • the suction line 15 is connected to a vacuum source or suction device, not shown, which sucks air laden with dust through the wall sections 6, 7, 8.
  • the size of the negative pressure generated in the negative pressure chamber 14 or of the air flow sucked through the wall sections 6, 7, 8 is adjustable, at for example in that the vacuum source or suction device is adjustable, or in that an adjustable throttle element, for example an adjustable throttle valve 16, is arranged in the suction line 15.
  • the air flow is adjusted so that it is sufficient to suction the dust through the line 15, so that the dust is not deposited on the top of the wall sections 6, 7, 8.
  • viewing windows 17 are provided in the upper housing part 2a, for example as indicated in FIG. 1 on the upper side thereof. It may also be expedient to arrange at least one purge air inlet 18 in the upper housing part 2a, through which purge air can be sucked into the vacuum chamber 14 from the surroundings.
  • the purge air inlets 18 also contain adjustable throttle elements, for example throttle valves 19 (FIG. 2).
  • the underside of the air and dust-permeable wall sections 6, 7, 8 is always kept clean by the conveying air flow flowing through the transfer chambers or by the fiber flakes transported by it. If the wall sections 6, 7, 8 are perforated, then the holes on the underside of the wall sections should not have any sharp edges so that no fibers or contaminants can get caught on these edges.
  • the wall sections 6, 7, 8 can expediently be formed by a perforated plate which has a galvanic coating on the underside. The coating then extends - with a rounded surface - somewhat into the holes.
  • the wall sections 6, 7, 8 are essentially permeable to air and dust over their entire surface.
  • FIG. 4 shows again the three guide plates 11, 12 and 13, which delimit two transfer chambers above the top of the roller 1, which are covered with an air and dust-permeable wall. From this wall sections 6 'and 7' are visible. Above the wall, two vacuum chambers 20 and 21 are formed, which are delimited by partitions 22, 23 and 24. The partition walls 22, 23 and 24 are aligned with the guide plates 11, 12 and 13, so that each of the vacuum chambers 20 and 21 is aligned with one of the two transfer chambers.
  • the vacuum chambers 20 and 21 are each connected via an outlet 25 or 26, in each of which an adjustable throttle valve is arranged, with a suction line 15 '.

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

Description

Die Erfindung bezieht sich auf eine Reinigungsmaschine für in einem Förderluftstrom transportierte Textilfasern, mit einer liegenden, mit Schlagelementen besetzten Walze, unter deren Unterseite Stabroste angeordnet sind und über deren Oberseite bei einem Ende der Walze ein Einlass und beim anderen Ende ein Auslass für den Förderluftstrom und zwischen dem Einlass und dem Auslass von zur Walzenachse schräg gestellten Leitplatten begrenzte Ueberleitkammern für den um die Walzenachse drehenden Luftstrom angeordnet sind.The invention relates to a cleaning machine for textile fibers transported in a conveying air stream, with a horizontal roller, equipped with impact elements, under the underside of which bar grids are arranged and over the top of which an inlet and the other end an outlet for the conveying air stream and at the other end of the roller delimited transfer chambers for the air flow rotating about the roller axis are arranged between the inlet and the outlet of guide plates inclined to the roller axis.

Mindestens eine solche Reinigungsmaschine ist bekannt und auf dem Markt erhältlich. Sie dient dazu, die im Förderluftstrom zugeführten Faserflocken aufzulösen und Verunreinigungen daraus zu entfernen. Das Fasermaterial wird über die Stabroste geschleppt und auch durch den Aufprall auf die die Ueberleitkammern begrenzenden Wände gewissermassen geklopft, wodurch Verunreinigungen von dem Material gelöst werden. Gröbere Verunreinigungen, wie z.B. Schalenteile, treten durch die Stabroste hindurch und werden dann abgesaugt. Feine, staubförmige Verunreinigungen verbleiben jedoch in den bekannten Maschinen mindestens teilweise im Förderluftstrom und verlassen dann die Maschine zusammen mit dem vom Förderluftstrom transportierten Fasermaterial.At least one such cleaning machine is known and available on the market. It serves to dissolve the fiber flakes supplied in the conveying air flow and to remove impurities from them. The fiber material is dragged over the bar grates and also tapped to a certain extent by the impact on the walls delimiting the transfer chambers, as a result of which contaminants are released from the material. Coarse contaminants, e.g. Shell parts, pass through the bar grids and are then suctioned off. Fine, dust-like contaminants, however, remain in the known machines at least partially in the conveying air flow and then leave the machine together with the fiber material transported by the conveying air flow.

Die Aufgabe der Erfindung besteht nun darin, die eingangs angegebene Reinigungsmaschine derart auszubilden, dass sie auch feine, staubförmige Verunreinigungen weitgehend von dem Fasermaterial abscheiden kann.The object of the invention is to design the cleaning machine specified at the outset in such a way that it can largely separate even fine, dust-like impurities from the fiber material.

Die Aufgabe ist erfindungsgemäss dadurch gelöst worden, dass die Überleitkammern mindestens teilweise mit einer luft- und staubdurchlässigen Wand abgedeckt sind, über welcher durch eine Haube mindestens eine an eine Saugleitung angeschlossene Unterdruckkammer gebildet ist.The object has been achieved according to the invention in that the transfer chambers are at least partially covered with an air- and dust-permeable wall over which at least one vacuum chamber connected to a suction line is formed by a hood is.

Durch die luft- und staubdurchlässige Wand der Überleitkammern hindurch kann aus den Überleitkammern Luft abgesaugt werden, mit welcher die sehr leichten, staubförmigen Schmutzteilchen aus dem das Fasermaterial transportierenden Förderluftstrom abgeschieden werden können.Air can be sucked out of the transfer chambers through the air- and dust-permeable wall of the transfer chambers, with which air the very light, dust-like dirt particles can be separated from the conveying air stream transporting the fiber material.

Die luft- und staubdurchlässige Wand der Überleitkammern ist beispielsweise ein Sieb oder ein Lochblech mit Löchern von etwa 1,5 mm Durchmesser. Sie kann bei jeder Überleitkammer - oder gegebenenfalls bei einer oder einigen der Überleitkammern - jeweils wenigstens einen Teil der Abdeckung bilden.The air- and dust-permeable wall of the transfer chambers is, for example, a sieve or a perforated plate with holes of approximately 1.5 mm in diameter. In each transfer chamber - or possibly in one or some of the transfer chambers - it can form at least part of the cover.

Die Unterdruckkammer kann allen Überleitkammern gemeinsam zugeordnet sein; es ist aber auch möglich, getrennte Unterdruckkammern für jede der Überleitkammern oder für jeweils einige der Überleitkammern anzuordnen. Vorzugsweise sind Mittel vorgesehen zum Einstellen des Unterdrucks in der Unterdruckkammer oder den Unterdruckkammern bzw. der durch diese abgesaugten Luftmenge, z.B. eine einstellbare Drosselklappe in der Saugleitung oder zwischen dieser und der Unterdruckkammer. Wenn mehrere getrennte Unterdruckkammern vorhanden sind, kann auch jeder derselben ein eigenes Drosselorgan (Klappe, Schieber o.dgl.) zugeordnet sein.The vacuum chamber can be assigned to all transfer chambers together; however, it is also possible to arrange separate vacuum chambers for each of the transfer chambers or for each of some of the transfer chambers. Means are preferably provided for adjusting the negative pressure in the negative pressure chamber or the negative pressure chambers or the amount of air drawn off by them, e.g. an adjustable throttle valve in the suction line or between it and the vacuum chamber. If there are several separate vacuum chambers, each of them can also be assigned its own throttle element (flap, slide or the like).

Ausführungsbeispiele der erfindungsgemässen Reinigungsmaschine werden nachstehend anhand der Zeichnung näher erläutert. In dieser zeigen:

  • Fig. 1 einen schematischen Vertikalschnitt durch eine Grobreinigungsmaschine,
  • Fig. 2 eine Draufsicht zu Fig. 1 im Schnitt nach der Linie II-II in Fig. 1,
  • Fig. 3 einen zu Fig. 1 senkrechten Vertikalschnitt durch die Maschine und
  • Fig. 4 einen Teilschnitt ähnlich Fig. 3 für eine abgeänderte Ausführungsform der Grobreinigungsmaschine.
Exemplary embodiments of the cleaning machine according to the invention are explained in more detail below with reference to the drawing. In this show:
  • 1 is a schematic vertical section through a coarse cleaning machine,
  • 2 is a plan view of FIG. 1 in section along the line II-II in FIG. 1,
  • 3 a vertical section through FIG. 1 through the machine and
  • Fig. 4 is a partial section similar to FIG. 3 for a modified embodiment of the coarse cleaning machine.

Die in den Fig. 1 bis 3 dargestellte Grobreinigungsmaschine besitzt eine Auflösewalze 1, die in einem Gehäuse 2 um eine horizontale Achse drehbar gelagert ist und deren Umfang in üblicher Weise mit Schlagstiften 3 besetzt ist. Die Walze 1 wird im Betrieb von einem nicht dargestellten Antriebsmotor in Pfeilrichtung gemäss Fig. 1 gedreht. Unter der Unterseite der Walze 1 sind zwei nur in Fig. 1 dargestellte Stabroste 4 und 5 angeordnet. Die Oberseite der Walze 1 ist im Abstand vom Walzenumfang mit einer Wand überdeckt, von der ein horizontaler, mittlerer Abschnitt 6 und zwei seitlich an diesen anschliessende, etwa 45° geneigte Seitenabschnitte 7 und 8 Luft- und staubdurchlässig sind. Die drei Wandabschnitte 6, 7 und 8 sind terrassendachartig angeordnet, das heisst im Querschnitt etwa wie drei Seiten eines gleichschenkligen Trapezes, und je zwei der Wandabschnitte schliessen miteinander jeweils einen Winkel (α) von etwa 135° ein. Die Wandabschnitte 6, 7 und 8 sind beispielsweise von einem Lochblech mit Löchern von etwa 1,5 mm Durchmesser oder von einem Sieb gebildet. In den Wandabschnitt 7 mündet bei einem Ende der Walze 1 von oben eine Einlassleitung 9, und in den Wandabschnitt 8 mündet beim anderen Ende der Walze 1 eine Auslassleitung 10. Zwischen den Mündungen der Einlassleitung 9 und der Auslassleitung 10 sind über der Oberseite der Walze 1, unterhalb der Wandabschnitte 6, 7, 8, drei zur Achse der Walze 1 schräg gestellte Leitbleche 11, 12 und 13 angeordnet, welche zwei Ueberleitkammern zwischen der Oberseite der Walze 1 und der Wand mit den Wandabschnitten 6, 7, 8 begrenzen. Eine von einem Oberteil 2a des Gehäuses 2 gebildete Haube begrenzt über der Wand mit den Wandabschnitten 6, 7, 8 eine Unterdruckkammer 14, an welche eine Saugleitung 15 angeschlossen ist.The coarse cleaning machine shown in FIGS. 1 to 3 has an opening roller 1 which is rotatably mounted in a housing 2 about a horizontal axis and the circumference of which is occupied in the usual way with striking pins 3. The roller 1 is rotated in operation by a drive motor, not shown, in the direction of the arrow in FIG. 1. Two bar grids 4 and 5, which are only shown in FIG. 1, are arranged under the underside of the roller 1. The top of the roller 1 is covered at a distance from the circumference of the roller with a wall, of which a horizontal, central section 6 and two laterally adjoining, approximately 45 ° inclined side sections 7 and 8 are permeable to air and dust. The three wall sections 6, 7 and 8 are arranged like a terrace roof, that is to say in cross section approximately like three sides of an isosceles trapezoid, and two of the wall sections each form an angle (α) of approximately 135 °. The wall sections 6, 7 and 8 are formed, for example, by a perforated plate with holes of approximately 1.5 mm in diameter or by a sieve. An inlet line 9 opens into the wall section 7 at one end of the roller 1, and an outlet line 10 opens into the wall section 8 at the other end of the roller 1. Between the mouths of the inlet line 9 and the outlet line 10 are above the top of the roller 1 , below the wall sections 6, 7, 8, three baffles 11, 12 and 13 arranged at an angle to the axis of the roller 1, which delimit two transfer chambers between the top of the roller 1 and the wall with the wall sections 6, 7, 8. A hood formed by an upper part 2a of the housing 2 delimits a vacuum chamber 14 above the wall with the wall sections 6, 7, 8, to which a suction line 15 is connected.

Im Betrieb werden der Grobreinigungsmaschine zu reinigende und aufzulösende Textilfasern in Flockenform in einem Förderluftstrom durch die Einlassleitung 9 zugeführt. Die Förderluft mit den Faserflocken strömt im wesentlichen zunächst um die Unterseite der drehenden Walze 1 herum, dann durch die Überleitkammer zwischen den Leitblechen 11 und 12, welche die Luft in Richtung der Achse der Walze 1 weiterbewegt, dann wieder um die Unterseite der Walze, dann durch die Überleitkammer zwischen den Leitblechen 12 und 13 und wieder um die Unterseite der Walze 1, um die Maschine schliesslich durch die Auslassleitung 10 zu verlassen. Beim Herumlaufen um die Unterseite der Walze 1 werden die Faserflocken durch die Schlagstifte 3 bearbeitet und zunehmend aufgelöst, und Verunreinigungen werden von den Fasern getrennt. Die gröberen Verunreinigungen, wie z.B. Schalenteile, werden durch die Stabroste 4 und 5 hindurch abgeschieden und aus dem Raum unter den Stabrosten durch eine nicht dargestellte Absaugeinrichtung abgesaugt. Danach fliegen die Faserflocken jeweils nach oben in die nächstfolgende Überleitkammer, wo sie durch Aufprallen auf die Wandabschnitte 6, 7, 8 weiter gelokkert werden. Feine, staubförmige Verunreinigungen, die von den Fasern getrennt worden sind, können höchstens teilweise durch die Stabroste 4 und 5 hindurch abgesaugt werden, während ein grosser Teil des Staubes im Förderluftstrom verbleibt. Die luft- und staubdurchlässigen Wandabschnitte 6, 7, 8, die Unterdruckkammer 14 und die Saugleitung 15 dienen dazu, auch diese feinen Verunreinigungen vom Förderluftstrom zu trennen, so dass sie nicht am Ende mit diesem und den Fasern durch die Auslassleitung 10 austreten können. Die Saugleitung 15 ist an eine nicht dargestellte Unterdruckquelle bzw. Absaugeinrichtung angeschlossen, welche mit Staub beladene Luft durch die Wandabschnitte 6, 7, 8 hindurch absaugt.In operation, the coarse cleaning machine has flake-like textile fibers to be cleaned and dissolved supplied in a conveying air flow through the inlet line 9. The conveying air with the fiber flakes essentially flows first around the underside of the rotating roller 1, then through the transfer chamber between the guide plates 11 and 12, which moves the air in the direction of the axis of the roller 1, then again around the underside of the roller, then through the transfer chamber between the guide plates 12 and 13 and again around the underside of the roller 1 to finally leave the machine through the outlet line 10. When running around the underside of the roller 1, the flakes of fiber are processed and increasingly dissolved by the striking pins 3, and impurities are separated from the fibers. The coarser impurities, such as shell parts, are separated through the rod grids 4 and 5 and sucked out of the space under the rod grids by a suction device, not shown. Thereafter, the fiber flakes fly upward into the next transfer chamber, where they are further loosened by hitting the wall sections 6, 7, 8. Fine, dust-like impurities which have been separated from the fibers can at most be partially sucked off through the bar grids 4 and 5, while a large part of the dust remains in the conveying air flow. The air and dust-permeable wall sections 6, 7, 8, the vacuum chamber 14 and the suction line 15 serve to separate these fine impurities from the conveying air flow, so that they cannot end up with this and the fibers through the outlet line 10. The suction line 15 is connected to a vacuum source or suction device, not shown, which sucks air laden with dust through the wall sections 6, 7, 8.

Die Grösse des in der Unterdruckkammer 14 erzeugten Unterdrucks bzw. des durch die Wandabschnitte 6, 7, 8 hindurch abgesaugten Luftstroms ist einstellbar, bei spielsweise dadurch, dass die Unterdruckquelle bzw. Absaugeinrichtung einstellbar ist, oder dadurch, dass in der Saugleitung 15 ein einstellbares Drosselorgan, z.B. wie gezeichnet eine einstellbare Drosselklappe 16, angeordnet ist. Der Luftstrom wird so eingestellt, dass er ausreicht, um den Staub durch die Leitung 15 abzusaugen, so dass sich der Staub nicht auf der Oberseite der Wandabschnitte 6, 7, 8 ablagert. Um das beobachten zu können, sind im Gehäuseoberteil 2a, z.B. wie in Fig. 1 angedeutet auf dessen Oberseite, Sichtfenster 17 vorgesehen. Es kann ferner zweckmässig sein, im Gehäuseoberteil 2a wenigstens einen Spüllufteinlass 18 anzuordnen, durch welchen aus der Umgebung Spülluft in die Unterdruckkammer 14 gesaugt werden kann. Die Spüllufteinlässe 18 enthalten ebenfalls einstellbare Drosselorgane, z.B. Drosselklappen 19 (Fig. 2).The size of the negative pressure generated in the negative pressure chamber 14 or of the air flow sucked through the wall sections 6, 7, 8 is adjustable, at for example in that the vacuum source or suction device is adjustable, or in that an adjustable throttle element, for example an adjustable throttle valve 16, is arranged in the suction line 15. The air flow is adjusted so that it is sufficient to suction the dust through the line 15, so that the dust is not deposited on the top of the wall sections 6, 7, 8. In order to be able to observe this, viewing windows 17 are provided in the upper housing part 2a, for example as indicated in FIG. 1 on the upper side thereof. It may also be expedient to arrange at least one purge air inlet 18 in the upper housing part 2a, through which purge air can be sucked into the vacuum chamber 14 from the surroundings. The purge air inlets 18 also contain adjustable throttle elements, for example throttle valves 19 (FIG. 2).

Die Unterseite der luft- und staubdurchlässigen Wandabschnitte 6, 7, 8 wird durch den durch die Überleitkammern strömenden Förderluftstrom bzw. durch die von diesem transportierten Faserflocken stets sauber gehalten. Wenn die Wandabschnitte 6, 7, 8 perforiert sind, dann sollten die Löcher an der Unterseite der Wandabschnitte keine scharfen Kanten aufweisen, damit an diesen Kanten keine Fasern oder Verunreinigungen hängen bleiben können. Die Wandabschnitte 6, 7, 8 können zweckmässig von einem Lochblech gebildet sein, das an der Unterseite einen galvanischen Überzug aufweist. Der Überzug erstreckt sich dann - mit einer gerundeten Oberfläche - etwas in die Löcher hinein.The underside of the air and dust-permeable wall sections 6, 7, 8 is always kept clean by the conveying air flow flowing through the transfer chambers or by the fiber flakes transported by it. If the wall sections 6, 7, 8 are perforated, then the holes on the underside of the wall sections should not have any sharp edges so that no fibers or contaminants can get caught on these edges. The wall sections 6, 7, 8 can expediently be formed by a perforated plate which has a galvanic coating on the underside. The coating then extends - with a rounded surface - somewhat into the holes.

In der beschriebenen Ausführungsform der Grobreinigungsmaschine sind die Wandabschnitte 6, 7, 8 im wesentlichen auf ihrer ganzen Fläche luft- und staubdurchlässig. Es ist aber natürlich auch möglich, die Wandabschnitte 6, 7, 8 nur stellenweise luft- und staubdurchlässig auszubilden, z.B. nur über einer der von den Leitblechen 11, 12 und 13 begrenzten Überleitkam mern oder nur über einem Teil der Länge dieser Kammern (in Richtung des Förderluftstroms durch die Kammern gesehen).In the described embodiment of the coarse cleaning machine, the wall sections 6, 7, 8 are essentially permeable to air and dust over their entire surface. However, it is of course also possible to make the wall sections 6, 7, 8 air and dust permeable only in places, for example only over one of the transfer lines delimited by the guide plates 11, 12 and 13 or only over part of the length of these chambers (viewed in the direction of the conveying air flow through the chambers).

In einer anderen Variante können anstelle der in den Fig. 1 und 3 gezeigten einzigen Unterdruckkammer 14, die allen Überleitkammern gemeinsam zugeordnet ist, auch mehrere getrennte Unterdruckkammern vorgesehen sein, die je einer (oder ggf. einigen) der Überleitkammern zugeordnet sind. Eine solche Variante ist in Fig. 4 dargestellt. Man sieht dort wieder die drei Leitbleche 11, 12 und 13, welche über der Oberseite der Walze 1 zwei Überleitkammern begrenzen, die mit einer luft- und staubdurchlässigen Wand abgedeckt sind. Von dieser Wand sind Abschnitte 6′ und 7′ sichtbar. Über der Wand sind zwei Unterdruckkammern 20 und 21 gebildet, die von Trennwänden 22, 23 und 24 begrenzt sind. Die Trennwände 22, 23 und 24 fluchten mit den Leitblechen 11, 12 und 13, so dass jede der Unterdruckkammern 20 und 21 auf eine der beiden Überleitkammern ausgerichtet ist. Die Unterdruckkammern 20 und 21 sind über je einen Auslass 25 bzw. 26, in welchem jeweils eine einstellbare Drosselklappe angeordnet ist, mit einer Saugleitung 15′ verbunden.In another variant, instead of the single vacuum chamber 14 shown in FIGS. 1 and 3, which is assigned to all transfer chambers in common, several separate vacuum chambers can also be provided, each of which is assigned to one (or possibly some) of the transfer chambers. Such a variant is shown in FIG. 4. One sees again the three guide plates 11, 12 and 13, which delimit two transfer chambers above the top of the roller 1, which are covered with an air and dust-permeable wall. From this wall sections 6 'and 7' are visible. Above the wall, two vacuum chambers 20 and 21 are formed, which are delimited by partitions 22, 23 and 24. The partition walls 22, 23 and 24 are aligned with the guide plates 11, 12 and 13, so that each of the vacuum chambers 20 and 21 is aligned with one of the two transfer chambers. The vacuum chambers 20 and 21 are each connected via an outlet 25 or 26, in each of which an adjustable throttle valve is arranged, with a suction line 15 '.

Letztlich besteht auch die Möglichkeit, die Wandstärke d der Wandabschnitte 6, 7, 8 derart zu wählen, dass diese Wandabschnitte im Betrieb, infolge ihrer abgewinkelten Anordnung, durch den Aufprall des im Förderluftstrom transportierten Fasermaterials in Vibrationen versetzt werden.Ultimately, there is also the possibility of choosing the wall thickness d of the wall sections 6, 7, 8 in such a way that these wall sections are caused to vibrate in operation due to their angled arrangement due to the impact of the fiber material transported in the conveying air flow.

Claims (9)

1. Cleaning machine for textile fibres conveyed in a current of delivery air, with a horizontal roller (1), which is fitted with beater elements (3) and on its underside comprises bar grates (4, 5) and above its upper side comprises an inlet (9) at one end of the roller and an outlet (10) at the other end for the delivery air and between the inlet (9) and the outlet (10) deflector plates (11, 12, 13) are arranged which slope towards the axis of the roller and define transfer chambers for the current of air flowing round the axis of the roller, characterised by the fact that the transfer chambers are at least partly covered with a wall (6, 7, 7) which is permeable to air and dust and above which at least one low pressure chamber (14; 20, 21) connected to a suction pipe (15, 15′) is formed by a hood (2a).
2. Cleaning machine according to claim 1, characterised by a means (16) for adjusting the height of the vacuum in the or every low pressure chamber (14; 20, 21).
3. Cleaning machine according to claim 2, characterised by the fact that the said means comprises at least one adjustable throttling member, e.g. a throttle valve (16).
4. Cleaning machine according to one of claims 1 to 3, characterised by the fact that the hood (2a) has at least one inspection window (17) through which the depositing of dust on the air and dust-permeable wall (6, 7, 8) can be observed.
5. Cleaning machine according to one of claims 1 to 4, characterised by the fact that the hood (2a) has at least one air inlet (9) for the introduction of scavenging air into the low pressure chamber (14) or at least one of the low pressure chambers (20, 21).
6. Cleaning machine according to claim 5, characterised by the fact that an adjustable throttling member is arranged in the air inlet (18), e.g. a throttle valve (19).
7. Cleaning machine according to one of claims 1 to 6, characterised by the fact that the wall (6, 7, 8) which is permeable to air and dust is formed by a perforated sheet which is provided with an electroplated coating on the side acted upon by the textile fibres.
8. Cleaning machine according to one of claims 1 to 6, characterised by the fact that the wall which is permeable to air and dust has at least three wall sections (6, 7, 8) arranged as terraces, two of these wall sections in each case forming an angle (α) of preferably approximately 135° with each other.
9. Cleaning machine according to one of claims 1 to 8, characterised by the fact that the air permeable wall (6, 7, 8) has a wall thickness (d) which is so selected that the wall (6, 7, 8) is caused to vibrate during operation by the impact of the textile fibre material conveyed in the delivery air.
EP89123946A 1989-01-26 1989-12-27 Cleaning machine for textile fibres Expired - Lifetime EP0379726B1 (en)

Applications Claiming Priority (2)

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CH242/89 1989-01-26
CH24289 1989-01-26

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EP0379726B1 true EP0379726B1 (en) 1992-07-22

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EP (1) EP0379726B1 (en)
JP (1) JPH02229220A (en)
DE (1) DE58901892D1 (en)

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Also Published As

Publication number Publication date
DE58901892D1 (en) 1992-08-27
EP0379726A1 (en) 1990-08-01
JPH02229220A (en) 1990-09-12
US4964196A (en) 1990-10-23

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