EP3072999A1 - Device for cutting staple fibers - Google Patents

Device for cutting staple fibers Download PDF

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Publication number
EP3072999A1
EP3072999A1 EP16000155.8A EP16000155A EP3072999A1 EP 3072999 A1 EP3072999 A1 EP 3072999A1 EP 16000155 A EP16000155 A EP 16000155A EP 3072999 A1 EP3072999 A1 EP 3072999A1
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EP
European Patent Office
Prior art keywords
cutting wheel
spindle
gripper
shaft
cutting
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.)
Granted
Application number
EP16000155.8A
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German (de)
French (fr)
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EP3072999B1 (en
Inventor
Rolf Schröder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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Publication of EP3072999A1 publication Critical patent/EP3072999A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
    • D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member

Definitions

  • the invention relates to a device for cutting staple fibers from a bundle of endless fiber strands, which are at least partially guided around a rotatable cutting wheel, wherein the cutting wheel has on its periphery a plurality of knives, which interact with a pressure or force loaded pressure element such in that the fiber strands are cut between the pressure element and the knives, wherein the cutting wheel is drivably coupled via a shaft to a drive.
  • the EP 0059234 B1 shows a fiber cutting device in which the cutting wheel is encapsulated by several components and only by manually loosening a plurality of screws and dowel pins, the cutting wheel can be removed.
  • the entire system must stand still, because at this time a possible intermediate storage can not absorb the continuously produced amount of continuous fibers.
  • it is expected that the time required to change the cutting wheel will be a maximum of 45 seconds.
  • the object of the present invention is to improve a device for cutting staple fibers to the effect that a reliable and quick change of the cutting wheel is possible to ensure a continuous further operation of the spinning-stretching plant.
  • the apparatus for cutting staple fibers from a bundle of endless fiber strands comprises at least one rotatable cutting wheel about which the fiber strands are at least partially passed, the cutting wheel having a plurality of knives on its circumference.
  • the knives cooperate with a pressure or force loaded pressure element such that the fiber strands are cut between the pressure element and the blades, wherein the cutting wheel is drivably coupled via a shaft with a drive.
  • the invention is characterized in that a spindle is arranged within the shaft, wherein the cutting wheel with the shaft via a releasable clamping device is connected, which is to be opened or closed by an axial movement of the spindle.
  • the axial movement of the spindle to close the clamping device via an energy storage via an energy storage.
  • the energy accumulator which may be formed in a preferred embodiment as a spring assembly, pulls the spindle in the axial direction upwards, whereby the clamping device is locked.
  • the axial movement of the spindle for opening the clamping device is pneumatically, hydraulically or by electric motor generated.
  • the spindle is connected to a pneumatic cylinder, which moves the spindle against the force of the energy accumulator in the axial direction, in this embodiment, to the cutting wheel. After switching off the pneumatic, hydraulic or electromotive force of the energy storage or the spring package pulls the spindle in the axial direction back up, whereby the clamping device is locked.
  • the clamping device comprises at least one gripper which connects the shaft with the cutting wheel directly or indirectly in the closed position.
  • the gripper leads almost synchronously with the spindle also an axial movement, over which the connection between the spindle and the cutting wheel is released or produced.
  • the gripper is preferably guided in a slide guide, wherein the gripper has a recess in the region of the inner diameter, which is closed in the upper closed position towards the cutting wheel. In a lower open position, the recess is opened towards the cutting wheel so that a shoulder of a tightening bolt connected to the cutting wheel is released.
  • the gripper has an outwardly directed shoulder in the form of a collar, which cooperates with the release of the tensioning device with a mushroom-shaped head of the tightening bolt and the sliding guide, and thus releases the tightening bolt.
  • the mushroom-shaped head provides for a positive opening of the gripper, so that the underside of the collar must slide along it.
  • the collar dips into a circumferential groove of the slide guide to give room for an increase in diameter.
  • the gripper would connect together with the backdrop the cutting wheel with the tightening bolt directly to each other as in a plug-in coupling.
  • FIG. 1 shows an embodiment of a cutting device 1 according to the invention for cutting staple fibers from a bundle of endless fiber strands.
  • a about the axis of rotation of a shaft 10 rotatable and driven by motor cylindrical cutting wheel 2 has on its periphery a plurality of blades 3, which point with their cutting in the direction of the outer periphery.
  • only two blades 3 of a total of about 50 or more knives are exemplified.
  • the distance of the knife edges on the outer circumference corresponds approximately to the future cut fiber length.
  • a drive 9 is arranged laterally on a housing 8 with which the cutting wheel 2 is set in rotary motion via the shaft 10.
  • a spindle 4 and a clamping device 20 is arranged, wherein at least the spindle 4 is movable in the axial direction.
  • the spindle 4 is surrounded by a spring assembly 7, which acts on the clamping device 20 with bias.
  • a pneumatic cylinder 6 is arranged, with which the spring assembly 7 can be pressed together. This has no contact with the spindle 4 with rotating shaft 10, so that the shaft 10 can rotate freely.
  • the gripper 23 is at least partially hollow cylindrical or formed as a tubular member with different internal shoulders and diameters and can its opening at its lower end face, which is assigned to the cutting wheel 2 is, zoom in or out.
  • the gripper 23 In order to mount the gripper 23 and so that it can enlarge or reduce its opening at the lower end face, it has been divided along its longitudinal axis into at least two elements. It may also be useful to divide the gripper 23 along its longitudinal axis into, for example, three or four elements.
  • the elements of the gripper 23 are separate components there, which together in a bore or guide (here a slide guide 22) mounted the gripper 23 form.
  • the gripper 23 cooperates with a cylindrical pin 21 which is releasably secured to the spindle 4 via a thread 4a.
  • the bolt 21 has an upper shoulder 21 a and a lower shoulder 21 b, which are formed as an increase in diameter of the cylindrical bolt 21.
  • the gripper 23 on a recess 23 a which is arranged as an increase in diameter of the inner diameter in the central region.
  • this recess 23a engages in the upper part of the lower shoulder 21b of the bolt 21 a.
  • the head 24a of a tightening bolt 24 engages.
  • the gripper 23 has at its lower end an outwardly directed shoulder 23b.
  • the multi-part gripper 23 is guided with its outer diameter by a sliding guide 22 and held together.
  • the slotted guide 22 is also as a tubular Component or socket formed and arranged in the shaft 10 and fixed.
  • the tensioning device 20 has the advantage that a secure locking of the cutting wheel 2 is always ensured by the spring assembly 7 without auxiliary power.
  • An unlocking of the clamping device 20 takes place by acting on the spring assembly 7 by the pneumatic cylinder 6, whereby the spring assembly 7 is compressed and the spindle 2 is lowered.
  • the upper shoulder 21 a of the pin 21 presses the gripper 23 at its upper end face in the slotted guide 20 down.
  • the gripper 23 opens due to its geometry despite weight load by the mushroom-shaped head 24a.
  • the recess 23a increases so far that the mushroom-shaped head 24a of the tightening bolt 24 fits through the resulting increase in diameter and the cutting wheel 2 is no longer held.
  • the relief of the spindle 2 with the compression of the spring assembly 7 causes in this embodiment, a vertical displacement of the cooperating components of about 10 mm.
  • the spring assembly 7 and the pneumatic cylinder 6 is to be adapted in the dimensioning.
  • the invention has the advantage that no auxiliary power for fixing the cutting wheel 2 is needed.
  • the fixing or loosening of the cutting wheel 2 by the clamping device 20 is effected only by a limited axial movement of the spindle 4, wherein the components of the clamping device 20, apart from the spring assembly 7, all form-fitting together. Only the spindle 4 is positively moved in the locked state upwards and held, wherein the adhesion is canceled by the pneumatic cylinder 6 for unlocking.

Abstract

Die Erfindung betrifft eine Vorrichtung zum Schneiden von Stapelfasern aus einem Bündel von endlosen Fasersträngen, die um ein drehbares Schneidrad (2) zumindest teilweise herumgeleitet werden, wobei das Schneidrad (2) auf seinem Umfang eine Vielzahl von Messern (3) aufweist, die mit einem druck- oder kraftbelasteten Druckelement derart zusammen wirken, dass die Faserstränge zwischen dem Druckelement und den Messern (3) zerschnitten werden, wobei das Schneidrad (2) über eine Welle (10) mit einem Antrieb (9) antreibbar gekoppelt ist Die Erfindung ist dadurch gekennzeichnet ist, dass innerhalb der Welle (10) eine Spindel (4) angeordnet ist, wobei das Schneidrad (2) mit der Welle (10) über eine lösbare Spannvorrichtung (20) verbunden ist, die über eine axiale Bewegung der Spindel (4) zu öffnen oder zu schließen ist.The invention relates to a device for cutting staple fibers from a bundle of endless fiber strands, which are at least partially passed around a rotatable cutting wheel (2), wherein the cutting wheel (2) on its periphery a plurality of knives (3), which with a pressure or force loaded pressure element cooperate such that the fiber strands between the pressure element and the blades (3) are cut, the cutting wheel (2) via a shaft (10) with a drive (9) is drivably coupled The invention is characterized in that a spindle (4) is arranged within the shaft (10), wherein the cutting wheel (2) is connected to the shaft (10) by means of a releasable tensioning device (20) which moves in axial movement of the spindle (4) open or close is.

Description

Die Erfindung betrifft eine Vorrichtung zum Schneiden von Stapelfasern aus einem Bündel von endlosen Fasersträngen, die um ein drehbares Schneidrad zumindest teilweise herumgeleitet werden, wobei das Schneidrad auf seinem Umfang eine Vielzahl von Messern aufweist, die mit einem druck- oder kraftbelasteten Druckelement derart zusammen wirken, dass die Faserstränge zwischen dem Druckelement und den Messern zerschnitten werden, wobei das Schneidrad über eine Welle mit einem Antrieb antreibbar gekoppelt ist.The invention relates to a device for cutting staple fibers from a bundle of endless fiber strands, which are at least partially guided around a rotatable cutting wheel, wherein the cutting wheel has on its periphery a plurality of knives, which interact with a pressure or force loaded pressure element such in that the fiber strands are cut between the pressure element and the knives, wherein the cutting wheel is drivably coupled via a shaft to a drive.

Zwischen dem Schneidrad und dem Druckelement laufen die endlosen Faserstränge, die durch die Messer - entsprechend der Teilung durch die Anordnung der Messer auf dem Umfang des Messerträgers - in eine vorgegebene Länge an Stapelfasern zerteilt werden. Da dieser Vorgang kein klassisches Schneiden, sondern ein Zerdrücken mit Gleitreibung ist, können nach einer bestimmten Zeit die Messer stumpf werden und sogar brechen. Daher muss in regelmäßigen Abständen das Schneidrad gewechselt werden, was möglichst schnell erfolgen soll, da bei kontinuierlicher Produktion der Endlosfasern ein Zwischenspeicher nur eine begrenzte Menge aufnehmen kann.Between the cutting wheel and the pressure element to run the endless fiber strands, which are divided by the blades - according to the division by the arrangement of the blades on the circumference of the blade carrier - in a predetermined length of staple fibers. Since this process is not classical cutting but crushing with sliding friction, after a certain time the knives may become dull and even break. Therefore, the cutting wheel must be changed at regular intervals, which should be as fast as possible, since with continuous production of continuous fibers a buffer can only hold a limited amount.

Nach dem Stand der Technik ist es bekannt, eine Zentralschraube der Antriebswelle von unten manuell durch den Sammeltrichter zu lösen. Alternativ kann die Zentralschraube von oben über einen heb- und senkbaren Druckluftschrauber gelöst werden. Danach kann das Schneidrad abgesenkt und ausgetauscht werden.According to the prior art, it is known to solve a central screw of the drive shaft from below manually through the collecting funnel. Alternatively, the central screw can be released from above via a pneumatic screwdriver that can be raised and lowered. Thereafter, the cutting wheel can be lowered and replaced.

Die EP 0059234 B1 zeigt eine Faserschneidvorrichtung, bei der das Schneidrad von mehreren Bauteilen gekapselt wird und erst durch manuelles Lösen von mehreren Schrauben und Passstiften das Schneidrad entnommen werden kann. Hierzu muss die gesamte Anlage stillstehen, da bei diesem Zeitaufwand ein möglicher Zwischenspeicher die kontinuierlich produzierte Menge an Endlosfasern nicht aufnehmen kann. Bei Produktionsanlagen großer Tonnage wird erwartet, dass der Zeitaufwand zum Wechseln des Schneidrades maximal 45 Sekunden beträgt.The EP 0059234 B1 shows a fiber cutting device in which the cutting wheel is encapsulated by several components and only by manually loosening a plurality of screws and dowel pins, the cutting wheel can be removed. For this purpose, the entire system must stand still, because at this time a possible intermediate storage can not absorb the continuously produced amount of continuous fibers. For large tonnage production plants, it is expected that the time required to change the cutting wheel will be a maximum of 45 seconds.

Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung zum Schneiden von Stapelfasern dahingehend zu verbessern, dass ein zuverlässiges und schnelles Wechseln des Schneidrades möglich ist, um einen kontinuierlichen Weiterbetrieb der Spinn-Streckanlage zu gewährleisten.The object of the present invention is to improve a device for cutting staple fibers to the effect that a reliable and quick change of the cutting wheel is possible to ensure a continuous further operation of the spinning-stretching plant.

Die Erfindung löst die gestellte Aufgabe mit den Merkmalen von Anspruch 1. Weitere vorteilhafte Ausgestaltungsmerkmale der Erfindung sind durch die Unteransprüche gekennzeichnet.The invention achieves the stated object with the features of claim 1. Further advantageous design features of the invention are characterized by the subclaims.

Gemäß der technischen Lehre nach Anspruch 1 umfasst die Vorrichtung zum Schneiden von Stapelfasern aus einem Bündel von endlosen Fasersträngen, zumindest ein drehbares Schneidrad, um die die Faserstränge zumindest teilweise herumgeleitet werden, wobei das Schneidrad auf seinem Umfang eine Vielzahl von Messern aufweist. Die Messer wirken mit einem druck- oder kraftbelasteten Druckelement derart zusammen, dass die Faserstränge zwischen dem Druckelement und den Messern zerschnitten werden, wobei das Schneidrad über eine Welle mit einem Antrieb antreibbar gekoppelt ist.According to the teachings of claim 1, the apparatus for cutting staple fibers from a bundle of endless fiber strands comprises at least one rotatable cutting wheel about which the fiber strands are at least partially passed, the cutting wheel having a plurality of knives on its circumference. The knives cooperate with a pressure or force loaded pressure element such that the fiber strands are cut between the pressure element and the blades, wherein the cutting wheel is drivably coupled via a shaft with a drive.

Die Erfindung ist dadurch gekennzeichnet, dass innerhalb der Welle eine Spindel angeordnet ist, wobei das Schneidrad mit der Welle über eine lösbare Spannvorrichtung verbunden ist, die über eine axiale Bewegung der Spindel zu öffnen oder zu schließen ist.The invention is characterized in that a spindle is arranged within the shaft, wherein the cutting wheel with the shaft via a releasable clamping device is connected, which is to be opened or closed by an axial movement of the spindle.

Dabei wirken alle Bauteile der Spannvorrichtung formschlüssig miteinander zusammen, so dass keine Hilfsenergie benötigt wird, um das Schneidrad zu fixieren. Da lediglich über die axiale Verstellung der Spindel die Spannvorrichtung zum Wechseln des Schneidrades geöffnet und verschlossen wird, ergibt sich eine minimale Wechselzeit für den Austausch des Schneidrades. Es ist kein kompliziertes Lösen oder Verschrauben von Befestigungselementen notwendig. Weiterhin finden keine Rotationsbewegungen von Bauteilen zueinander statt, so dass das System nahezu verschleißfrei arbeitet.In this case, all components of the clamping device cooperate with each other in a form-fitting manner, so that no auxiliary energy is needed to fix the cutting wheel. Since only the axial adjustment of the spindle, the clamping device for changing the cutting wheel is opened and closed, there is a minimum change time for the replacement of the cutting wheel. There is no complicated loosening or screwing fasteners necessary. Furthermore, there are no rotational movements of components to each other, so that the system operates almost wear-free.

Vorteilhafterweise erfolgt die axiale Bewegung der Spindel zum Schließen der Spannvorrichtung über einen Kraftspeicher. Der Kraftspeicher, der in bevorzugter Ausführungsform als Federpaket ausgebildet sein kann, zieht die Spindel in axialer Richtung nach oben, wodurch die Spannvorrichtung verriegelt wird.Advantageously, the axial movement of the spindle to close the clamping device via an energy storage. The energy accumulator, which may be formed in a preferred embodiment as a spring assembly, pulls the spindle in the axial direction upwards, whereby the clamping device is locked.

Bevorzugt wird die axiale Bewegung der Spindel zum Öffnen der Spannvorrichtung pneumatisch, hydraulisch oder elektromotorisch erzeugt. In einer bevorzugten Ausführungsform ist die Spindel mit einem Pneumatikzylinder verbunden, der die Spindel gegen die Kraft des Kraftspeichers in axialer Richtung, in diesem Ausführungsbeispiel auf das Schneidrad zu, verschiebt. Nach Abschalten der pneumatischen, hydraulischen oder elektromotorischen Kraft zieht der Kraftspeicher bzw. das Federpaket die Spindel in axialer Richtung wieder nach oben, wodurch die Spannvorrichtung verriegelt wird.Preferably, the axial movement of the spindle for opening the clamping device is pneumatically, hydraulically or by electric motor generated. In a preferred embodiment, the spindle is connected to a pneumatic cylinder, which moves the spindle against the force of the energy accumulator in the axial direction, in this embodiment, to the cutting wheel. After switching off the pneumatic, hydraulic or electromotive force of the energy storage or the spring package pulls the spindle in the axial direction back up, whereby the clamping device is locked.

Dabei umfasst die Spannvorrichtung mindestens einen Greifer, der in geschlossener Position die Welle mit dem Schneidrad direkt oder indirekt verbindet. Der Greifer führt dabei fast synchron mit der Spindel ebenfalls eine axiale Bewegung aus, über die die Verbindung zwischen der Spindel und dem Schneidrad gelöst oder hergestellt wird.In this case, the clamping device comprises at least one gripper which connects the shaft with the cutting wheel directly or indirectly in the closed position. The gripper leads almost synchronously with the spindle also an axial movement, over which the connection between the spindle and the cutting wheel is released or produced.

Der Greifer wird vorzugsweise in einer Kulissenführung geführt, wobei der Greifer im Bereich des Innendurchmessers eine Aussparung aufweist, die in der oberen geschlossenen Position zum Schneidrad hin geschlossen ist. In einer unteren geöffneten Position ist die Aussparung zum Schneidrad hin geöffnet, so dass ein Absatz eines Anzugbolzens, der mit dem Schneidrad verbunden ist, freigegeben wird.The gripper is preferably guided in a slide guide, wherein the gripper has a recess in the region of the inner diameter, which is closed in the upper closed position towards the cutting wheel. In a lower open position, the recess is opened towards the cutting wheel so that a shoulder of a tightening bolt connected to the cutting wheel is released.

Der Greifer weist einen nach außen gerichteten Absatz in Form eines Kragens auf, der beim Lösen der Spannvorrichtung mit einem pilzförmigen Kopf des Anzugbolzens und der Kulissenführung zusammen wirkt, und damit den Anzugbolzen freigibt. Der pilzförmige Kopf sorgt für eine Zwangsöffnung des Greifers, so dass die Unterseite des Kragens darüber entlang gleiten muss. Der Kragen taucht dabei in eine umlaufende Nut der Kulissenführung ein, um Platz für eine Durchmesservergrößerung zu geben.The gripper has an outwardly directed shoulder in the form of a collar, which cooperates with the release of the tensioning device with a mushroom-shaped head of the tightening bolt and the sliding guide, and thus releases the tightening bolt. The mushroom-shaped head provides for a positive opening of the gripper, so that the underside of the collar must slide along it. The collar dips into a circumferential groove of the slide guide to give room for an increase in diameter.

Durch eine konvexe Gestaltung der Außenkontur des Greifers über seine axiale Erstreckung wird bei einem Schließen der Spannvorrichtung der untere Bereich des Greifers mit dem Kragen derart wieder in die Kulissenführung gezogen, dass sich der Innendurchmesser der Aussparung verkleinert und sowohl ein Absatz des Bolzens, der mit der Spindel verbunden ist, wie auch ein Absatz des Anzugbolzens, der mit dem Schneidrad verbunden ist, formschlüssig mit der Aussparung zusammen wirkt. Der Greifer verbindet dabei das Schneidrad indirekt über die Spindel mit der Welle.By a convex configuration of the outer contour of the gripper over its axial extent the lower portion of the gripper with the collar is pulled back into the slotted guide so that the inner diameter of the recess and reduced both a shoulder of the bolt, with the closing of the clamping device Spindle is connected, as well as a paragraph of the tightening bolt, which is connected to the cutting wheel, positively cooperates with the recess. The gripper connects the cutting wheel indirectly via the spindle with the shaft.

Bei einer einteiligen Ausführung von Spindel und Greifer würde der Greifer zusammen mit der Kulisse das Schneidrad mit dem Anzugbolzen direkt miteinander wie bei einer Steckkupplung verbinden.In a one-piece design of spindle and gripper, the gripper would connect together with the backdrop the cutting wheel with the tightening bolt directly to each other as in a plug-in coupling.

Die Erfindung wird nachfolgend anhand eines möglichen schematisch dargestellten Ausführungsbeispieles näher erläutert. Es zeigt:

Figur 1:
eine Teildarstellung einer Faserschneidvorrichtung mit einem fixierten Schneidrad;
Figur 2:
eine Detaildarstellung der zugehörigen Spannvorrichtung;
Figur 3:
eine Detaildarstellung der Spannvorrichtung mit einem gelösten Schneidrad.
The invention will be explained in more detail with reference to a possible schematically illustrated embodiment. It shows:
FIG. 1:
a partial view of a fiber cutting device with a fixed cutting wheel;
FIG. 2:
a detailed view of the associated clamping device;
FIG. 3:
a detailed view of the clamping device with a dissolved cutting wheel.

Figur 1 zeigt ein Ausführungsbeispiel einer erfindungsgemäßen Schneidvorrichtung 1 zum Schneiden von Stapelfasern aus einem Bündel von endlosen Fasersträngen. Ein um die Drehachse einer Welle 10 drehbares und mittels Motor angetriebenes zylindrisches Schneidrad 2 weist auf seinem Umfang eine Vielzahl von Messern 3 auf, die mit ihren Schneiden in Richtung des Außenumfanges zeigen. In diesem Ausführungsbeispiel sind nur zwei Messer 3 von insgesamt ca. 50 oder mehr Messern beispielhaft dargestellt. Der Abstand der Messerschneiden auf dem Außenumfang entspricht dabei ungefähr der zukünftigen geschnittenen Faserlänge. Seitlich an einem Gehäuse 8 angeordnet ist ein Antrieb 9, mit dem das Schneidrad 2 über die Welle 10 in eine Drehbewegung versetzt wird. Innerhalb der Welle 10 ist eine Spindel 4 und eine Spannvorrichtung 20 angeordnet, wobei zumindest die Spindel 4 in axialer Richtung bewegbar ist. Im oberen Bereich der Welle 10 ist die Spindel 4 von einem Federpaket 7 umgeben, das mit Vorspannung die Spannvorrichtung 20 beaufschlagt. Oberhalb der Spindel 4 ist ein Pneumatikzylinder 6 angeordnet, mit dem das Federpaket 7 zusammen gedrückt werden kann. Dieser hat bei rotierender Welle 10 keinen Kontakt zur Spindel 4, so dass sich die Welle 10 frei drehen kann. FIG. 1 shows an embodiment of a cutting device 1 according to the invention for cutting staple fibers from a bundle of endless fiber strands. A about the axis of rotation of a shaft 10 rotatable and driven by motor cylindrical cutting wheel 2 has on its periphery a plurality of blades 3, which point with their cutting in the direction of the outer periphery. In this embodiment, only two blades 3 of a total of about 50 or more knives are exemplified. The distance of the knife edges on the outer circumference corresponds approximately to the future cut fiber length. Arranged laterally on a housing 8 is a drive 9 with which the cutting wheel 2 is set in rotary motion via the shaft 10. Within the shaft 10, a spindle 4 and a clamping device 20 is arranged, wherein at least the spindle 4 is movable in the axial direction. In the upper region of the shaft 10, the spindle 4 is surrounded by a spring assembly 7, which acts on the clamping device 20 with bias. Above the spindle 4, a pneumatic cylinder 6 is arranged, with which the spring assembly 7 can be pressed together. This has no contact with the spindle 4 with rotating shaft 10, so that the shaft 10 can rotate freely.

Bezugnehmend auf Figur 1 und die Vergrößerung in Figur 2 umfasst die Spannvorrichtung 20 im Wesentlichen einen pilzförmigen Anzugbolzen 24 und einen damit korrespondierenden Greifer 23. Der Greifer 23 ist zumindest teilweise hohlzylindrisch bzw. als rohrförmiges Bauteil mit unterschiedlichen innenliegenden Absätzen und Durchmessern ausgebildet und kann seine Öffnung an seiner unteren Stirnseite, die dem Schneidrad 2 zugeordnet ist, vergrößern oder verkleinern. Um den Greifer 23 montieren zu können und damit er seine Öffnung an der unteren Stirnseite vergrößern oder verkleinern kann, ist er entlang seiner Längsachse in mindestens zwei Elemente aufgeteilt worden. Sinnvoll kann es ebenfalls sein, den Greifer 23 entlang seiner Längsachse beispielsweise in drei oder vier Elemente aufzuteilen. Die Elemente des Greifer 23 stellen separate Bauteile da, die zusammen in eine Bohrung oder Führung (hier eine Kulissenführung 22) montiert den Greifer 23 bilden.Referring to FIG. 1 and the magnification in FIG. 2 the gripper 23 is at least partially hollow cylindrical or formed as a tubular member with different internal shoulders and diameters and can its opening at its lower end face, which is assigned to the cutting wheel 2 is, zoom in or out. In order to mount the gripper 23 and so that it can enlarge or reduce its opening at the lower end face, it has been divided along its longitudinal axis into at least two elements. It may also be useful to divide the gripper 23 along its longitudinal axis into, for example, three or four elements. The elements of the gripper 23 are separate components there, which together in a bore or guide (here a slide guide 22) mounted the gripper 23 form.

Der Greifer 23 wirkt mit einem zylinderförmigen Bolzen 21 zusammen, der mit der Spindel 4 lösbar über ein Gewinde 4a befestigt ist. Der Bolzen 21 weist einen oberen Absatz 21a und einen unteren Absatz 21b auf, die als Durchmesservergrößerung des zylinderförmigen Bolzens 21 ausgebildet sind.The gripper 23 cooperates with a cylindrical pin 21 which is releasably secured to the spindle 4 via a thread 4a. The bolt 21 has an upper shoulder 21 a and a lower shoulder 21 b, which are formed as an increase in diameter of the cylindrical bolt 21.

In diesem Ausführungsbeispiel weist der Greifer 23 eine Aussparung 23a auf, die als Durchmesservergrößerung des Innendurchmessers im mittleren Bereich angeordnet ist. In diese Aussparung 23a greift im oberen Teil der untere Absatz 21b des Bolzens 21 ein. Im unteren Teil der Aussparung 23a greift der Kopf 24a eines Anzugbolzens 24 ein. Weiterhin weist der Greifer 23 an seinem unteren Ende einen nach außen gerichteten Absatz 23b auf. Der mehrteilige Greifer 23 wird mit seinem Außendurchmesser durch eine Kulissenführung 22 geführt und zusammengehalten. Die Kulissenführung 22 ist ebenfalls als rohrförmiges Bauteil bzw. Buchse ausgebildet und in der Welle 10 angeordnet und befestigt.In this embodiment, the gripper 23 on a recess 23 a, which is arranged as an increase in diameter of the inner diameter in the central region. In this recess 23a engages in the upper part of the lower shoulder 21b of the bolt 21 a. In the lower part of the recess 23a, the head 24a of a tightening bolt 24 engages. Furthermore, the gripper 23 has at its lower end an outwardly directed shoulder 23b. The multi-part gripper 23 is guided with its outer diameter by a sliding guide 22 and held together. The slotted guide 22 is also as a tubular Component or socket formed and arranged in the shaft 10 and fixed.

Bezugnehmend auf Figur 1 und 2 ist der Pneumatikzylinder 6 außer Betrieb, wodurch das Federpaket 7 mit den vielen aufeinander geschichteten Tellerfedern die Spindel 4 nach oben, also von dem Schneidrad 2 weg zieht. Da der Bolzen 21 über das Gewinde 4a mit der Spindel 4 verbunden ist, zieht der untere Absatz 21 b des Bolzens 21 den Greifer 23 in der Kulissenführung 22 nach oben. In die Aussparung 23a greift auch der Absatz 24a des Anzugbolzens 24 ein. Dadurch wird auch das über das Gewinde 24b mit dem Anzugbolzen 24 verbundene Schneidrad 2 nach oben gezogen. Die Übertragung des Antriebsdrehmomentes vom Antrieb 9 über die Welle 10 auf das Schneidrad 2 erfolgt durch den Bolzen 5. Die erfindungsgemäße Spannvorrichtung 20 hat den Vorteil, dass ohne Hilfsenergie immer eine sichere Verriegelung des Schneidrades 2 durch das Federpaket 7 gewährleistet ist.Referring to FIG. 1 and 2 is the pneumatic cylinder 6 out of service, causing the spring assembly 7 with the many stacked disc springs, the spindle 4 moves upwards, ie away from the cutting wheel 2. Since the pin 21 is connected via the thread 4a with the spindle 4, the lower shoulder 21 b of the bolt 21 pulls the gripper 23 in the slotted guide 22 upwards. In the recess 23a and the paragraph 24a of the tightening bolt 24 engages. As a result, the cutting wheel 2 connected via the thread 24b to the tightening bolt 24 is also pulled upwards. The transmission of the drive torque from the drive 9 via the shaft 10 to the cutting wheel 2 is effected by the bolt 5. The tensioning device 20 according to the invention has the advantage that a secure locking of the cutting wheel 2 is always ensured by the spring assembly 7 without auxiliary power.

Eine Entriegelung der Spannvorrichtung 20 erfolgt durch eine Beaufschlagung des Federpaketes 7 durch den Pneumatikzylinder 6, wodurch das Federpaket 7 zusammengedrückt wird und die Spindel 2 abgesenkt wird. Damit drückt der obere Absatz 21 a des Bolzens 21 den Greifer 23 an seiner oberen Stirnfläche in der Kulissenführung 20 nach unten. Der Greifer 23 öffnet sich aufgrund seiner Geometrie trotz Gewichtsbelastung durch den pilzförmigen Kopf 24a. Die Aussparung 23a vergrößert sich soweit, dass der pilzförmige Kopf 24a des Anzugbolzens 24 durch die entstehende Durchmesservergrößerung passt und das Schneidrad 2 nicht mehr gehalten wird. Die Entlastung der Spindel 2 mit dem Zusammendrücken des Federpaketes 7 bewirkt in diesem Ausführungsbeispiel eine vertikale Verschiebung der zusammenwirkenden Bauteile von rund 10 mm.An unlocking of the clamping device 20 takes place by acting on the spring assembly 7 by the pneumatic cylinder 6, whereby the spring assembly 7 is compressed and the spindle 2 is lowered. Thus, the upper shoulder 21 a of the pin 21 presses the gripper 23 at its upper end face in the slotted guide 20 down. The gripper 23 opens due to its geometry despite weight load by the mushroom-shaped head 24a. The recess 23a increases so far that the mushroom-shaped head 24a of the tightening bolt 24 fits through the resulting increase in diameter and the cutting wheel 2 is no longer held. The relief of the spindle 2 with the compression of the spring assembly 7 causes in this embodiment, a vertical displacement of the cooperating components of about 10 mm.

Entsprechend der Größe des Schneidrades ist das Federpaket 7 und der Pneumatikzylinder 6 in der Dimensionierung anzupassen.According to the size of the cutting wheel, the spring assembly 7 and the pneumatic cylinder 6 is to be adapted in the dimensioning.

Die Erfindung hat den Vorteil, dass keine Hilfsenergie zum Fixieren des Schneidrades 2 benötigt wird. Dadurch, dass keine Rotationsbewegungen zu einander stattfinden, ist das System nahezu verschleißfrei.The invention has the advantage that no auxiliary power for fixing the cutting wheel 2 is needed. The fact that no rotational movements take place to each other, the system is virtually wear-free.

Die Fixierung bzw. das Lösen des Schneidrades 2 durch die Spannvorrichtung 20 erfolgt nur durch eine begrenzte axiale Bewegung der Spindel 4, wobei die Bauteile der Spannvorrichtung 20, abgesehen vom Federpaket 7, alle formschlüssig miteinander zusammen wirken. Lediglich die Spindel 4 wird im verriegelten Zustand kraftschlüssig nach oben bewegt und gehalten, wobei der Kraftschluss durch den Pneumatikzylinder 6 zur Entriegelung aufgehoben wird.The fixing or loosening of the cutting wheel 2 by the clamping device 20 is effected only by a limited axial movement of the spindle 4, wherein the components of the clamping device 20, apart from the spring assembly 7, all form-fitting together. Only the spindle 4 is positively moved in the locked state upwards and held, wherein the adhesion is canceled by the pneumatic cylinder 6 for unlocking.

Bezugszeichenreference numeral

11
Schneidvorrichtungcutter
22
Schneidradcutting wheel
33
Messerknife
44
Spindelspindle
4a4a
Gewindethread
55
Bolzenbolt
66
Pneumatikzylinderpneumatic cylinder
77
Federpaketspring assembly
88th
Gehäusecasing
99
Antriebdrive
1010
Wellewave
2020
Spannvorrichtungjig
2121
Bolzenbolt
21 a21 a
oberer Absatzupper paragraph
21 b21 b
unterer Absatzlower paragraph
2222
Kulissenführunglink guide
2323
Greifergrab
23a23a
Aussparungrecess
23b23b
Absatzparagraph
2424
AnzugbolzenPull studs
24a24a
pilzförmiger Kopfmushroom-shaped head
24b24b
Gewindethread

Claims (10)

Vorrichtung zum Schneiden von Stapelfasern aus einem Bündel von endlosen Fasersträngen, die um ein drehbares Schneidrad (2) zumindest teilweise herumgeleitet werden, wobei das Schneidrad (2) auf seinem Umfang eine Vielzahl von Messern (3) aufweist, die mit einem druck- oder kraftbelasteten Druckelement derart zusammen wirken, dass die Faserstränge zwischen dem Druckelement und den Messern (3) zerschnitten werden, wobei das Schneidrad (2) über eine Welle (10) mit einem Antrieb (9) antreibbar gekoppelt ist, dadurch gekennzeichnet, dass innerhalb der Welle (10) eine Spindel (4) angeordnet ist, wobei das Schneidrad (2) mit der Welle (10) über eine lösbare Spannvorrichtung (20) verbunden ist, die über eine axiale Bewegung der Spindel (4) zu öffnen oder zu schließen ist.Apparatus for cutting staple fibers from a bundle of endless fiber strands which are at least partially passed around a rotatable cutting wheel (2), the cutting wheel (2) having on its periphery a plurality of knives (3) loaded with a pressure or force load Pressure element act together so that the fiber strands between the pressure element and the blades (3) are cut, the cutting wheel (2) via a shaft (10) with a drive (9) is drivably coupled, characterized in that within the shaft ( 10) a spindle (4) is arranged, wherein the cutting wheel (2) with the shaft (10) via a releasable clamping device (20) is connected, which is to be opened or closed by an axial movement of the spindle (4). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die axiale Bewegung der Spindel (4) zum Schließen der Spannvorrichtung (20) über einen Kraftspeicher erfolgt.Apparatus according to claim 1, characterized in that the axial movement of the spindle (4) for closing the clamping device (20) takes place via a force accumulator. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die axiale Bewegung der Spindel (4) zum Öffnen der Spannvorrichtung (20) pneumatisch, hydraulisch oder elektromotorisch erfolgt.Device according to one of the preceding claims, characterized in that the axial movement of the spindle (4) for opening the clamping device (20) takes place pneumatically, hydraulically or by electric motor. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Kraftspeicher als Federpaket (7) ausgebildet ist.Apparatus according to claim 2, characterized in that the energy accumulator is designed as a spring assembly (7). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spannvorrichtung (20) mindestens einen Greifer (23) umfasst, der in geschlossener Position die Welle (10) mit dem Schneidrad (2) direkt oder indirekt verbindet.Device according to one of the preceding claims, characterized in that the tensioning device (20) comprises at least one gripper (23) which connects the shaft (10) with the cutting wheel (2) directly or indirectly in the closed position. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Greifer (23) zumindest teilweise hohlzylindrisch bzw. als rohrförmiges Bauteil ausgebildet ist, dessen Öffnung an der unteren Stirnseite, die dem Schneidrad 2 zugeordnet ist, vergrößer- oder verkleinerbar ist.Apparatus according to claim 5, characterized in that the gripper (23) is at least partially hollow cylindrical or formed as a tubular member whose opening at the lower end side, which is assigned to the cutting wheel 2, is increased or decreased. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Greifer (23) innerhalb einer Kulissenführung (22) in axialer Richtung verfahrbar ist.Apparatus according to claim 5 or 6, characterized in that the gripper (23) within a slotted guide (22) is movable in the axial direction. Vorrichtung nach Anspruch 5 bis 7, dadurch gekennzeichnet, dass ein Bolzen (21), der mit der Spindel (4) verbunden ist, mit dem Greifer (23) zusammen wirkt.Apparatus according to claim 5 to 7, characterized in that a bolt (21) which is connected to the spindle (4) cooperates with the gripper (23). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schneidrad (2) mit einem Anzugbolzen (24) mit einem pilzförmigen Kopf (24a) verbunden ist, der mit dem Greifer (23) zusammen wirkt.Device according to one of the preceding claims, characterized in that the cutting wheel (2) with a tightening bolt (24) with a mushroom-shaped head (24a) is connected, which cooperates with the gripper (23). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Greifer (23) einen nach außen gerichteten Absatz (23b) aufweist, der beim Lösen der Spannvorrichtung (20) mit der Kulissenführung (22) zusammen wirkt, und damit den Anzugbolzen (24) freigibt.Device according to one of the preceding claims, characterized in that the gripper (23) has an outwardly directed shoulder (23b) which cooperates with the sliding guide (22) when releasing the tensioning device (20), and thus the tightening bolt (24). releases.
EP16000155.8A 2015-03-23 2016-01-22 Device for cutting staple fibers Active EP3072999B1 (en)

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DE102015104330.0A DE102015104330B3 (en) 2015-03-23 2015-03-23 Device for cutting staple fibers

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CN108406886A (en) * 2018-03-07 2018-08-17 段明辉 Apparatus for cutting fiber

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DE2554578A1 (en) * 1974-12-06 1976-06-10 Akzo Gmbh METHOD AND DEVICE FOR CUTTING STAPLE FIBERS
DE2745610A1 (en) * 1977-10-11 1979-04-12 Barmag Barmer Maschf Staple fibre cutting wheel - has a fixed and an independent butt to hold cutting blade for simple and rapid blade replacement
EP0059234B1 (en) 1981-03-04 1984-11-28 Neumünstersche Maschinen- und Apparatebau Gesellschaft mbH (NEUMAG) Staple-fibre cutting machine
DE9100822U1 (en) * 1991-01-25 1992-02-27 Neumag - Neumuenstersche Maschinen- Und Anlagenbau Gmbh, 2350 Neumuenster, De
WO2001007692A1 (en) * 1999-07-27 2001-02-01 Lenzing Technik Gmbh & Co Kg Device for the production of viscose staple fibers
US20030056376A1 (en) * 2001-09-25 2003-03-27 Herbert Peters Device for cutting a fiber cable
CN201386161Y (en) * 2009-03-05 2010-01-20 江阴博伦化纤有限公司 Pressure-cutting type cutting machine for polyester fiber

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CN105986337A (en) 2016-10-05
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EP3072999B1 (en) 2018-06-06

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