EP0403801B1 - Vorrichtung mit einem Rotor zum Offenend-Spinnen - Google Patents

Vorrichtung mit einem Rotor zum Offenend-Spinnen Download PDF

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Publication number
EP0403801B1
EP0403801B1 EP19900109363 EP90109363A EP0403801B1 EP 0403801 B1 EP0403801 B1 EP 0403801B1 EP 19900109363 EP19900109363 EP 19900109363 EP 90109363 A EP90109363 A EP 90109363A EP 0403801 B1 EP0403801 B1 EP 0403801B1
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EP
European Patent Office
Prior art keywords
guide body
spinning rotor
fibres
rotor
spinning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900109363
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English (en)
French (fr)
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EP0403801A1 (de
Inventor
Stanislav Didek
Petr Blazek
Alois Stejskal
Zdenek Havránek
Jaroslav Slingr
Josef Dolezal
Zelmira Borovcova
Jaroslava Steklikova
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.)
Vyzkumny Ustav Bavlnarsky AS
Original Assignee
Vyzkumny Ustav Bavlnarsky AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vyzkumny Ustav Bavlnarsky AS filed Critical Vyzkumny Ustav Bavlnarsky AS
Publication of EP0403801A1 publication Critical patent/EP0403801A1/de
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Publication of EP0403801B1 publication Critical patent/EP0403801B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor

Definitions

  • the invention relates to an open-end rotor spinning device comprising a one-sidedly open spinning rotor, a positively driven guide body in the form of a ring, tube, or the like, which enters by its rear end coaxially the spinning rotor and whose inner wall serves for depositing supplied fibres, for supportingly guiding and finally delivering them to the spinning rotor, further an immovable covering body which is associated with the front end of the guide body and through which a guide tube or duct extends for supplying fibres to the inner wall of said guide body, and a take-off duct or tube which extends through the axis of the spinning rotor or that of the covering body and which serves for withdrawing yarn out of the spinning rotor, there being provided between the spinning rotor and the guide body an annular spacing through which the communicating spaces of the spinning rotor and the guide body are connected to a first sucking unit.
  • a disadvantage of the above device resides in that it does not allow a wide assortment of yarns from cotton fibres and synthetic cotton-type fibres to be manufactured; actually, there are concerned only the so called carded yarn sorts 14.5 to 100, or 166 tex count for the manufacture of which relatively short and coarse fibres are used. Admittedly, if using finer fibres it is possible to approach even the count range of the so called combed yarn sorts but the final product does not reach the desired quality. It is why such combed yarns of from 5 to 14.5 tex are manufactured exclusively in ring spinning frames from relatively long and fine fibres.
  • an air discharge hole through which the communicating spaces of the spinning rotor and the guide body are connected either to a second sucking unit, there being arranged at least in front of the first sucking unit an air regulating member or at least the first sucking unit having a selectable sucking output, or also to said first sucking unit but in parallel to the annular spacing between the spinning rotor and the guide body, the air regulating members being associated with said annular spacing and the air discharge hole.
  • the process of withdrawing short fibres of exactly predetermined length and of leaving longer fibres of desired length in the spinning process can be effected by adjusting the revolution rates of the spinning rotor and the guide body in a ratio. It is to be noted that the ejected short fibres do not practically mean any production loss, since they can be used for further processing as, for instance, to yarns of another sort.
  • the device can operate as the conventional open-end spinning machine and that it is capable of producing a wider yarn assortment.
  • the fact that almost all air volume leaves the communicating spaces of the spinning rotor and the guide body at the side of front end of the guide body is also advantageous in that the air flows from the guide duct to the air discharge hole on a short path so that it cannot influence in any way the advance of fibres toward the spinning rotor and the process of fibre depositing in its interior.
  • the air discharge hole can be made as a through hole which is provided in the covering body and whose inlet portion at the inner side of said covering body has the form of at least a part of annular cavity and extends in peripheral direction along the inner marginal portion of said guide body, or as an annular gap between the guide body and the covering body.
  • a labyrinth packing should preferably be provided between the front end of the guide body and the covering body, the packing serving for perfectly separating the inlet portion of said through hole from the ambient atmosphere so that no air losses occur.
  • the spinning station or unit forming one consituent of the device according to the invention can be - except for some modifications due to the new system of sucking air off the communicating spaces of the spinning rotor and the guide body - of a usual construction.
  • a conventional open-end rotor spinning machine from a plurality of such units and an air sucking system therefor, the system comprising either a first and a second air sucking system, or the first sucking system only.
  • the spinning rotor 2 of the spinning unit 1 is fixed onto a driven shaft 3 which is mounted for rotation in a bearing bush 4 received for reciprocation in a bushing portion 5 of a rotor box 6 and secured therein by a fastening bolt 7.
  • the spinning rotor 2 has the form of a shallow dish with a flat circular bottom 8, a rounded mouth 9 of a smaller diameter than said bottom 8, and an inner wall 10 outstanding from the bottom 8 and conically tapering toward the mouth 9.
  • the bottom 8 and the wall 10 form together a fibre collecting channel.
  • the rotor box 6 surrounding, at a radial distance, the spinning rotor 2 is provided at its front, also open side with a recess 11 coaxial to the spinning rotor 2, in which a rotary, positively driven guide body 13 is received and mounted by means of an antifriction radial bearing 12.
  • the guide body 13 has the form of an annulus and is provided, at its rear end 14 facing the spinning rotor 2, with a frontal circular recess 15 by which said rear end 14 is radially divided into an inner and an outer portion 16 and 17, respectively; the inner portion 16 is disposed in the mouth 9 of the spinning rotor 2 while the outer portion 17 outside said mouth.
  • annular spacing 18 which connects the communicating spaces of the spinning rotor 2 and the guide body 13 together with an inner air space 19 of the rotor box 6.
  • This inner air space 19 is confined, at the side of the rotor box 6, by its rear wall 20, an annular projection 21 provided in a radial plane with said outer portion 17 of the rear end 14 of the guide body 13 as a sealing partition, and by an inner peripheral wall 22 between said rear wall 20 and said annular projection 21, and communicates via hole 23 with a first sucking pipeline 24.
  • the inner wall 25 of the guide body 13 has the form of the lateral area of a cone, its minimum diameter being at the side of front end 26 of the guide body 13.
  • the rotor box 6 is covered by a removable but otherwise immovable covering body 27 the inner wall 28 of which is spaced apart at a very small distance from the front end 26 of the guide body 13.
  • the device is provided with an air discharge hole constituted by a through hole 29 leading in radial direction to an extended axis X of revolution of the guide body 13 through the body 27, and connected to a second sucking pipeline 30.
  • the inlet portion 31 of said pipeline 30 has the form of an annular cavity and extends in peripheral direction along an inner marginal portion 32 of the guide body 13 as it is apparent from Figure 2.
  • the through hole 29 can be provided in a tubular member inserted into the covering body 27. Such an embodiment is not shown in the drawings.
  • FIG. 3 Another embodiment of the air discharge hole is shown in Figure 3. It consists of an annular gap 33 between the inner marginal portion 32 of the guide body 13 and a peripheral surface 34 of the conical projection 35 provided on the inner wall 28 of said covering body 27, the projection being disposed in the front end 26 of the guide body 13. Also in this embodiment there is provided in the covering body 27 the same through hole 29 as shown in Figure 1.
  • the inlet portion 31 of said hole 29, however, has the form of a complete annular cavity and is an immediate proximity of said conical projection 35.
  • a labyrinth packing 36 consisting, as shown in Figure 1, of an annular projection 37 provided on the inner wall 28 of the covering body 27 and of a corresponding recess 38 on the facing front surface of the front end 26 of the guide body 13. It, however, is to be understood that the packing elements can be arranged in a reversed, or any other alternative embodiment, provided they exhibit a desired, air penetration preventing effect.
  • a guide tube 40 for supplying fibres 39 to the inner wall 25 of the guide body 13 extends through the covering body 27; alternatively, if the conical projection 35 is provided on the inner wall 28 of said body 27 - as hereinabove set forth - the guide tube 40 can be replaced by a guide duct 41 (Fig. 3). In every case, however, also a take-off tube 42 extends through the covering body 27, through which yarn 43 is withdrawn out of the spinning rotor 2.
  • the air sucking system as shown in Figure 1 is a central system for a plurality of spinning stations 1; it comprises a first main conduit 44 which is connected to a first sucking unit 45 with an upstream filtering element 46 and into which enters the first sucking pipeline 24 leading from the individual spinning stations 1.
  • a second main conduit 47 is connected to a second sucking unit 48 into which the second sucking pipeline 30 opens; the latter leads also from the individual spinning stations 1.
  • the two sucking units 45, 48 and the filtering element 46 can be of any structure which is usual for textile machines with air sucking regimes.
  • air regulating members 49, 50 In front of the two sucking units 45, 48 there are arranged air regulating members 49, 50, respectively, e.g. in the form of a valve which, however, can be omitted if installing sucking units 45, 48 with selectable sucking output.
  • Figure 4 shows also an alternative central air sucking system comprising the first main conduit 44 and the second main conduit 47 which are connected together at their homothetic ends to form a central duct 51 which is then connected to the first sucking unit 45 with upstream filtering element 46.
  • the first sucking pipeline 24 enters the first main conduit 44, and the second sucking pipeline 30 the second main conduit 47.
  • the air regulating members 49 and 50 are associated with the annular spacing 18 between the spinning rotor 2 and the guide body 13, and with the through hole 29 in the covering body 27, and are disposed at the ends of said first main conduit 44 and the second main conduit 47, respectively.
  • the filtering element 46 can alternatively be installed in the first main conduit 44 in front of the respective air regulating member 50 as indicated in Fig.4 by dash contours.
  • the two latter elements rotate in the same direction; however, the guide body 13 rotates slower than the spinning rotor but, on the other hand, faster than is the velocity of air supplying fibres 39 to the inner wall 25 of said body 13. Simultaneously, almost all of the volume of fibre carrying air which enters the communicating inner spaces of the spinning rotor 2 and the guide body 13 leaves said spaces at the side of front end 26 of said body 13 whereas only a small, remaining air portion escapes through the annular spacing 18 between the spinning rotor and the guide body.
  • Fibres 39 are supplied, under assistance of air flow, from a fibre opening device (not shown) in which they are separated from a fibrous sliver, and particularly a carded, or drafted sliver. After engaging the inner wall 25 of the guide body 13, the fibres 39 are caused, by the action of centrifugal forces, to advance on this inner wall 25 toward the spinning rotor. Before, however, reaching the wall 10 of the spinning rotor 2, they have first to overcome the annular spacing 18 between the spinning rotor 2 and the guide body 13.
  • Such fibres 39 are then easily entrained by air escaping through the annular spacing 18 between the spinning rotor 2 and the guide body 13 and withdrawn outside the spinning rotor 2 whereas the remaining longer fibres 53 follow undisturbed their way to said spinning rotor 2. Accordingly, it is made possible, within every predetermined ratio between revolutions rates of the spinning rotor 2 and the guide body 13, to withdraw or eject short fibres 52 of a quite definite length and to leave the longer fibres 53 in the spinning process to be processed to yarn of a desired kind and quality.
  • the exact length of fibres 52 to be ejected can also be controlled by adjusting the size of annular spacing 18 between the spinning rotor 2 and the guide body 13. After loosening the bolt 7 securing the bearing bush 4 for the shaft 3 of the spinning rotor 2, both the rotor and the bush can be axially displaced into desired positions wherein the bearing bush 4 can be fastened again by said bolt 7. It, however, has been found out that the size of said annular spacing 18 can be, in many cases, adjusted once for ever.
  • Figure 5 shows successive positions of one and the same short fibre 52.
  • a short fibre 52 takes on its trajectory S a first position P1 on the inner wall 25 of said guide body 13, then a second position P2 in the section U between the inner wall 25 of the guide body 13 and the wall 10 of the spinning rotor 2, a third position P3 in the annular spacing 18 between the spinning rotor 2 and the guide body 13, and a fourth position P4 in the inner air space 19 of the rotor box 6.
  • the corresponding positions P1, P2 and P3 of the short fibre 52 are shown in Figure 6.
  • the annular spacing 18 between the spinning rotor 2 and the guide body 13 can be adjusted to cause short fibres 52 of e.g. 20 mm length to be ejected while the remaining, longer fibres 53 are then processed to a fine combed yarn 43
  • the ejected short fibres 52 accumulated in the filtering element can be then processed to another type of yarns, or fabrics. Since a very pure "waste" is concerned, the short fibres 52 can be returned to the carding machine, and after drafting them on a drawing frame, it is possible to process them to carded yarn sorts, and particularly in the conventional open-end rotor spinning machine, or in the device of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (9)

  1. Eine Offenend-Rotorspinnvorrichtung (1) mit einem einseitig offenen Spinnrotor (2), einem positiv angetriebenen Führungskörper (13) in der Form eines Rings, einer Röhre oder dergleichen, welcher an seinem hinteren Ende koaxial in den Spinnrotor (2) eintritt und dessen innere Wand dazu dient, zugeführte Fasern (39) abzulagern, um sie stützend zu führen und schließlich zum Spinnrotor (2) zu liefern, ferner einem unbewegbaren Abdeckkörper (27), der dem vorderen Ende des Führungskörpers (13) zugeordnet ist und durch welchen sich eine Führungsleitung (40) oder -röhre erstreckt, die Fasern (39) der inneren Wand des Führungskörpers (13) zuführt, und einer Abnahmeleitung oder -röhre (42), die sich durch die Achse des Spinnrotors (2) oder des Abdeckkörpers (27) erstreckt und welche dazu dient, Garn aus dem Spinnrotor (2) zu entnehmen, wobei zwischen dem Spinnrotor (2) und dem Führungskörper (13) ein ringförmiger Zwischenraum (18) vorgesehen ist, durch welchen die kommunizierenden Räume des Spinnrotors (2) und des Führungskörpers (13) mit einer ersten Saugeinheit (45) verbunden sind, wobei die Vorrichtung
    dadurch gekennzeichnet ist,
    daß an der Seite eines vorderen Endes (26) des Führungskörpers (13) ein Luftablaßloch (29) vorgesehen ist, durch welches die kommunizierenden Räume des Spinnrotors (2) und des Führungskörpers (13) verbunden sind mit entweder einer zweiten Saugeinheit (48) oder auch mit der ersten Saugeinheit (45), jedoch parallel zum ringförmigen Zwischenraum (18) zwischen dem Spinnrotor (2) und dem Führungskörper (13), wobei wenigstens vor der ersten Saugeinheit (45) ein erstes Luftregelbauteil (49) angeordnet ist, oder wenigstens die erste Saugeinheit (45) einen selektierbaren Saugausgang aufweist, und vor der zweiten Saugeinheit (48) ein zweites Regelbauteil (50) angeordnet ist und die Luftregelbauteile (49, 50) dem ringförmigen Zwischenraum (18) und dem Luftablaßloch (29) zugeordnet sind.
  2. Eine Offenend-Rotorspinnvorrichtung nach Anspruch 1,
    worin das Luftablaßloch ein Durchgangsloch (29) ist, das im Abdeckkörper (27) vorgesehen ist und dessen Einlaßabschnitt (31) an der inneren Seite des Abdeckkörpers (27) die Form wenigstens eines Teils eines ringförmigen Hohlraums aufweist und sich in Umfangsrichtung entlang eines inneren Randabschnitts (32) des Führungskörpers (13) erstreckt.
  3. Eine Offenend-Rotorspinnvorrichtung nach Anspruch 1,
    worin das Luftablaßloch ein Durchgangsloch (29) ist, das im Abdeckkörper (27) vorgesehen ist und dessen Einlaßabschnitt (31) an der inneren Seite des Abdeckkörpers (27) die Form eines ringförmigen Spalts (33) zwischen dem Führungskörper (13) und dem Abdeckkörper (27) besitzt.
  4. Eine Offenend-Rotorspinnvorrichtung nach Anspruch 2 oder Anspruch 3,
    worin dem ringförmigen Zwischenraum (18) zwischen dem Spinnrotor (2) und dem Führungskörper (13) ein Filterelement (46) zugeordnet ist, das Fasern festhält und sammelt.
  5. Eine Offenend-Rotorspinnvorrichtung nach Anspruch 2,
    worin zwischen dem vorderen Ende (26) des Führungskörpers (13) und dem Abdeckkörper (27) eine Labyrinthdichtung (36) vorgesehen ist.
  6. Verfahren zum Zuführen von Fasern mithilfe einer Luftströmung von einer Faseröffnungsvorrichtung, in welcher sie von einem Faserband getrennt werden, hinein in einen Spinnrotor (2) einer Offenend-Rotorspinnvorrichtung mit einem positiv angetriebenen einseitig offenen Spinnrotor (2) und Führungskörper (13) in der Form eines Rings, einer Röhre oder dergleichen, der axial damit ausgerichtet ist und einen kleinen ringförmigen Zwischenraum (28) zusammen mit dem Spinnrotor (2) bildet, wobei der Durchmesser des kommunizierenden inneren Raumes des Spinnrotors (2) und des Führungskörpers (13) von der Fasersammelnut des Spinnrotors (2) zu einem vorderen Ende (26) des Führungskörpers (13) abnimmt und das Verfahren darin besteht, daß Fasern zuerst auf der Innenwand (25) des Führungskörpers (13) zugeführt werden, von wo aus die Fasern veranlaßt werden, durch die Wirkung einer Zentrifugalkraft auf dieser inneren Wand (25) zum Spinnrotor (2) vorzurücken, wo ein Garn gebildet und durch eine Abnahmeleitung entnommen wird,
    dadurch gekennzeichnet,
    daß nahezu das gesamte Luftvolumen, das dazu dient, die Fasern (39) zuzuführen, vom kommunizierenden inneren Raum des Spinnrotors (2) und des Führungskörpers (13) durch ein Luftablaßloch (29) an der Seite des vorderen Endes (26) des Führungskörpers (13) abgezogen wird, während lediglich ein kleiner Luftanteil durch den ringförmigen Zwischenraum zwischen dem Spinnrotor (2) und dem Führungskörper (13) strömt, und daß eine positive Differenz von Umdrehungsraten des Spinnrotors (2) und des Führungskörpers (13) aufrechterhalten wird.
  7. Verfahren nach Anspruch 6,
    dadurch gekennzeichnet,
    daß kurze Fasern exakt vorbestimmter Längen durch den ringförmigen Spalt (18) entnommen werden, indem das Verhältnis der Umdrehungsraten des Spinnrotors (2) und des Führungskörpers (13) eingestellt werden.
  8. Verfahren nach Anspruch 6,
    dadurch gekennzeichnet,
    daß irgendein Teil von dem Spinnrotor (2) zugeführten Fasern (39) durch den ringförmigen Spalt (18) nicht entnommen oder verworfen wird, indem das Verhältnis zwischen den Umdrehungsraten des Spinnrotors (2) und des Führungskörpers (13) eingestellt wird.
  9. Verfahren nach einem der Ansprüche 6 bis 8,
    dadurch gekennzeichnet,
    daß nahezu das gesamte Luftvolumen, das dazu dient, die Fasern zuzuführen, vom kommunizierenden inneren Raum des Spinnrotors (2) und des Führungskörpers (13) durch das Ablaßloch (29) an einem Ort abgezogen wird, der dem Ort diametral gegenüberliegt, wo die Fasern (39) durch eine Führungsröhre (40) zugeführt werden.
EP19900109363 1989-06-21 1990-05-17 Vorrichtung mit einem Rotor zum Offenend-Spinnen Expired - Lifetime EP0403801B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS374289A CS274638B2 (en) 1989-06-21 1989-06-21 Rotor spinning device
CS3742/89 1989-06-21

Publications (2)

Publication Number Publication Date
EP0403801A1 EP0403801A1 (de) 1990-12-27
EP0403801B1 true EP0403801B1 (de) 1994-04-13

Family

ID=5378401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900109363 Expired - Lifetime EP0403801B1 (de) 1989-06-21 1990-05-17 Vorrichtung mit einem Rotor zum Offenend-Spinnen

Country Status (4)

Country Link
EP (1) EP0403801B1 (de)
JP (1) JPH03113022A (de)
CS (1) CS274638B2 (de)
DE (1) DE69008046T2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306272A1 (de) * 1993-03-01 1994-09-08 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur Herstellung eines Fadens mit Hilfe einer Offenend-Spinnvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT268106B (de) * 1966-03-05 1969-01-27 Vyzk Ustav Bavlnarsky Spinnkammer-Spinnvorrichtung zum kontinuierlichen Spinnen von Textilfasern mit Unterdruck
DE2130738B2 (de) * 1971-06-21 1973-04-19 Offen-end-spinnvorrichtung
GB1419498A (en) * 1972-02-23 1975-12-31 Platt Saco Lowell Ltd Spinning of textile fibres

Also Published As

Publication number Publication date
DE69008046T2 (de) 1994-07-28
CS8903742A1 (en) 1990-11-14
DE69008046D1 (de) 1994-05-19
CS274638B2 (en) 1991-09-15
JPH03113022A (ja) 1991-05-14
EP0403801A1 (de) 1990-12-27

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