EP0568665B1 - Banc d'etirage pour machine a filer en fin, en particulier pour machine a filer a filiere - Google Patents

Banc d'etirage pour machine a filer en fin, en particulier pour machine a filer a filiere Download PDF

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Publication number
EP0568665B1
EP0568665B1 EP92922973A EP92922973A EP0568665B1 EP 0568665 B1 EP0568665 B1 EP 0568665B1 EP 92922973 A EP92922973 A EP 92922973A EP 92922973 A EP92922973 A EP 92922973A EP 0568665 B1 EP0568665 B1 EP 0568665B1
Authority
EP
European Patent Office
Prior art keywords
yarn
roller
cap
drafting arrangement
pair
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
EP92922973A
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German (de)
English (en)
Other versions
EP0568665A1 (fr
Inventor
Martin Tobler
Reto Debrunner
Martin Witschi
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0568665A1 publication Critical patent/EP0568665A1/fr
Application granted granted Critical
Publication of EP0568665B1 publication Critical patent/EP0568665B1/fr
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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings

Definitions

  • the invention relates to a drafting system of a fine spinning machine, in particular a nozzle spinning machine, according to the preamble of claim 1.
  • the invention also relates to a roller according to claim 4 and a re-piecing process according to claim 9.
  • the known apron drafting systems for fine spinning machines consist of several continuous steel rollers or lower cylinders and for each spinning station a drafting arm on which the spring-loaded top rollers are attached.
  • Such stretching mechanisms are known, for example, from the book by Dr.Ing.W.Wegener "Die Streckwerke der Spinnmaschinen" (Edition 1965, Springer Verlag).
  • An example of such a loading arm can be found in DE-A-30 25 032. Drafting arrangements that have been specially designed for nozzle spinning can be found in US 4,718,225 and US 5,038,553.
  • the yarn end When re-spinning onto a yarn end of a broken filament, e.g. the yarn end is returned through the spinnerets of a nozzle spinning machine and is guided past the drafting system, for example in the manner described in DE-A-37 06 728, the returned yarn section is to be guided into the clamping line of the rotating pair of output rollers.
  • This so-called depositing of the yarn section should preferably be carried out in a flowing sequence so that the yarn end is moved safely and in time to the center of the nip line of the exit rollers.
  • the thread In contrast to the deposit procedure, which, for example, according to DE 39 32 666 is used when attaching in a ring spinning machine, the thread extends in a nozzle spinning machine before being deposited through the nozzle, which has an opening in or on the gusset of the delivery roller pair (also called output roller pair).
  • the delivery roller pair also called output roller pair.
  • Such contact is acceptable for ring spinning (cf. DE 39 32 666, Fig. 3), but not for nozzle spinning (with a noticeably higher delivery speed).
  • the invention now has the object, on the one hand, of improving a drafting arrangement of the type mentioned above in such a way that a safe and timely depositing of the yarn section is ensured.
  • this object is achieved by the features of the characterizing part of claims 1 and 4.
  • the object of the invention is now to improve the re-spinning (in particular in a jet spinning machine) compared to the previously known methods. On the basis of methods according to DE-A-3 932 666, this object is achieved by the features of the characterizing part of claim 9.
  • FIG. 1 shows the injector nozzle 1 of a nozzle spinning machine in relation to the outlet rollers 2 and 3 of an apron drafting device 40, not shown, FIG. 4.
  • the output or delivery rollers 2, 3 form a delivery roller pair 39 (FIG. 4).
  • the lower roller 2 of the drafting system shown on the left here is a stub-shaped steel cylinder, but can also be a continuous steel cylinder which extends in a known manner over several spinning positions of the spinning machine.
  • the upper or pressure roller 3 is attached to a loading arm, not shown. It comprises a fixed axis 9 (FIG. 3) and a cylindrical hollow body 11 which is rotatably mounted on the axis 9 by means of bearings 8.
  • the body 11 is provided with a rubberized cover 4.
  • a cone-like attachment 5 is fastened on the axis 9 by means of a screw 10.
  • the attachment 5 has the shape of a truncated cone on the free end piece, as can be seen from FIG. 3.
  • the frustoconical part of the attachment merges into a cylindrical part which adjoins the roller body 11, but without touching it. This is secured by means of a fastening piece 12 from the attachment 5, which piece is connected to the axis 9 by the screw 10.
  • the attachment 5 and the axis 9 could be formed in one piece.
  • transition zone 5 'of the frustoconical surface, where it merges into the cylindrical surface is rounded.
  • the tapered surface of the attachment could, however, be rounded off, e.g. have a parabolic shape.
  • the attachment 5 does not rotate with the pressure roller 3, but is screwed tightly to the axis thereof, the yarn section 6 is prevented from being subjected to an abrasive stress by the rotating output rollers 2 and 3 during the phase of the lateral deflection next to the drafting system .
  • the larger outside diameter of the conical attachment 5 is at least the same size, but better is somewhat larger than the outside diameter of the adjoining part of the rubber cover 4 of the pressure roller 3.
  • the arrangement allows the yarn section 6 to be stored at a certain time, ie the yarn end can be stored in the yarn connection resp. Preparation processes are carried out at the right time at the location intended for the yarn connection, without doing so a premature connection with drawn fibers occurs in the running drafting system.
  • the article 5 described above is not only suitable for so-called apron drafting systems, but also for others, such as the so-called KEPA drafting system (see the above-mentioned book by Wegener, page 315). Since the attachment 5 is particularly easy to remove, the printing rollers can still be easily replaced for maintenance work.
  • Another possibility is the formation of the rotating part of the pressure roller 3 (e.g. the hollow body) with a side attachment 5; this solution is preferably dispensed with, since then, even with metallic, well-polished material, the abrasive stress mentioned above of the yarn section 6 cannot be prevented.
  • the manufacturing effort would be increased because, in order to prevent periodic yarn defects, the pressure roller 3 with the rubberized coating 4 should have increased concentricity. Compliance with these requirements is made more difficult by attaching an attachment.
  • the 2 has a central area 4A with the diameter D and two end areas 4B, 4C with a smaller diameter d 1 , d 2 .
  • the area 4B is adjacent to the article 5.
  • the nip line of the delivery roller pair 2, 3 is formed between the roller 2 and the central region 4A of the coating.
  • the largest diameter of the attachment 5 can be the same size as the diameter D of the central area 4A, ie it can protrude beyond the end area 4B.
  • the spinning station comprises a drafting system 40 with a pair of input rollers 37, a middle pair of rollers 38 (which is provided with straps) and the pair of delivery rollers 39.
  • a condenser 35 is connected upstream of the pair of input rollers 37 and forms part of a sliver stop 38 according to EP 353 575.
  • the elements in FIG. 4 are not realistically shown, but shown rather separately from each other, so that the individual parts are easier to recognize.
  • the drafting device 40 is followed by the nozzle body 1, which e.g. can be formed according to DE 40 23 985 or EP 489 686.
  • the yarn winding 50 comprises a rubbing roller 44 and a bobbin bracket 46 which carries a cheese 48. Normally, a yarn spun through the body 1 is drawn out by a pair of take-off rolls 42 and passed to the winder 50 to form a bobbin.
  • FIGS. 5 to 10 now show a re-piecing process in a spinning station according to FIG. 4 with a drafting system or a roller according to this invention.
  • the nozzle body is indicated with 1, the rollers of the delivery roller pair with 2.3 and Rolling the apron roller pair with 24.25.
  • the straps are indicated at 26.27.
  • the top or pressure roller 3 of the pair of delivery rollers has a "conical" attachment 5 according to the invention.
  • the opening of the nozzle body in the vicinity of the drafting system is indicated by 21 in FIGS. 6, 8 and 10.
  • the mouth of the suction nozzle is indicated at 29.
  • the suction nozzle In the standby position (Fig. 5,6) the suction nozzle is on the side of the drafting system.
  • the yarn section 6 extends laterally from the nozzle body 1 (viewed from above) almost parallel to the clamping line of the delivery roller pair 2, 3 (FIG. 6) and is guided by the conical end part of the attachment 5.
  • Figures 6, 8 and 10 are spatially distorted compared to the actual versions because the three-dimensionality of the thread course cannot be represented in these representations.
  • the cylindrical surfaces of the attachment 5 are "extended" to the left in order to emphasize that there is no contact of the thread with the cover 4.
  • the actual implementation is shown more realistically in FIG. 3.
  • the attachment 5 is formed in such a way that the yarn section does not come into contact with any rotating part of the drafting system (in this phase).
  • the thread can be held at this point without the thread being rubbed by the rotating rollers or without generating an additional twist in the thread.
  • the withdrawal of the thread from the suction nozzle can be initiated while it is being held in the standby position, specifically by the pair of take-off rollers 42 arranged downstream of the nozzle 1 (FIG. 4). This pull keeps the thread taut.
  • FIGS. 7 and 8 show an intermediate phase in which the suction nozzle 7 moves in the direction of the central plane of the drafting system.
  • a loop F (FIG. 8) forms on the attachment 5.
  • the loop F is continuously “shortened” by the aforementioned deduction.
  • the "apex" of this thread loop moves across the transition zone into the nip line of the pair of exit rollers.
  • the loop is subsequently removed by conveying the thread out of the suction nozzle 7, so that at the end of the depositing process the thread runs straight into the clamping line (FIG. 10).
  • the transition of the thread from the attachment 5 to the pressure roller 3 is facilitated by the fact that the end region 4B of the cover is also conical.
  • the smallest diameter of the conical region 4B can be smaller than the diameter of the cylindrical part of attachment 5.
  • the length or the design of the attachment 5 is to be selected such that, for a given position of the nozzle body 1, a yarn guided by the nozzle can extend over the attachment relative to the drafting system without touching a rotating part of the drafting system.
  • FIGS. 5 to 10 show that the yarn section 6 actually only touches a part of the conical surface, namely the part facing the roller 2.
  • the part of this surface which is further away from the roller 2 actually has no effect.
  • This part would therefore not necessarily have to be formed with a thread guiding surface, for example it would not have to taper.
  • the attachment 5 is nevertheless preferably rotationally symmetrical, since it can then be attached to the axis or pressure roller without special attention to its angular position and also represents an inexpensive solution to the task.
  • the movement of the suction nozzle 7 to the center plane of the drafting system is preferably carried out so quickly that the yarn loop F bridges the gap between the attachment 5 and the cover 4. This can prevent the yarn section 6 from getting caught in this gap.
  • FIGS. 11 to 16 three further variants are shown, which show that the attachment does not have to be provided on the axis of the pressure roller.
  • the parts of the variant according to FIGS. 1 to 10 already described are indicated in FIGS. 11 to 16 with the same reference numerals.
  • the changes deal exclusively with the article and its bearer.
  • the attachment of the attachment to the carrier is no longer within the pressure roller but on the surface part of the attachment, which is not touched by the thread during the laying movement.
  • the attachment 105 is carried by an arm 106, which is mounted on a service robot (not shown, but see e.g. EP 421 152) as an element of a handling device.
  • a service robot not shown, but see e.g. EP 421 152
  • the attachment 105 of the printing roller 3 can be advanced during an operating procedure.
  • the attachment 105 can be provided with a bushing 107 (FIG. 12) which receives an end part of the axis 9. But this is not essential.
  • the small gap S between the attachment 105 and the coating 4 can, as already described, be bridged by the movement of the suction nozzle 7 41.
  • the attachment 105 only has to be provided once for all spinning stations operated by the service robot.
  • the attachment 105 could be formed in one piece with the arm 106, but is preferably formed separately and on the arm 106 e.g. attached in area 108 (Fig. 12).
  • FIGS. 13 and 14 shows an attachment 115 which is carried by an arm 116.
  • Arm 116 is attached to the loading arm (not shown) of the drafting system.
  • the attachment can either be integrally formed with the arm 116 or attached to it.
  • FIGS. 13 and 14 show a further variant, which differs from the embodiment according to FIGS. 13 and 14 only in that the support arm 117 not on the loading arm of the drafting system but by means of a plate 118 on a part (not shown) of the machine frame in FIG is attached near the nozzle body.

Landscapes

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

Claims (10)

  1. Train d'étirage pour une machine a filage fin, particulièrement une machine à filer par buses, avec au moins une paire de rouleaux d'entrée, une zone d'étirage à lanières et une paire de rouleaux de sortie (2, 3), dans lequel une couronne (5) est adjointe au rouleau de pression (3) de la paire de rouleaux de sortie, et la couronne (5) possède une surface de guidage de fil qui est apte à guider un fil dans la ligne de pinçage de la paire de rouleaux de sortie,
    caractérisé par le fait que
    la couronne (5) est disposée d'une manière stationnaire dans le train d'étirage.
  2. Train d'étirage selon revendication 1,
    caractérisé par le fait que
    la couronne est portée par un élément qui est stationnaire par rappart au train d'étirage.
  3. Train d'étirage selon revendication 1,
    caractérisé par le fait que
    la couronne est portée par un élément qui, par rapport au train d'étirage, est mobile de telle sorte que la couronne peut être rapportée au rouleau de pression (3).
  4. Rouleau pour un train d'étirage d'une machine à filage fin avec un axe (9) et un corps de rouleau porté d'une manière rotative sur l'axe (9),
    caractérisé par le fait
    qu'une couronne (5) est reliée d'une manière fixe avec l'axe (9), et possède une surface de guidage de fil qui est apte à guider un fil dans une ligne de pinçage formée par le rouleau.
  5. Train d'étirage selon revendication 1, respectivement rouleau selon revendication 4,
    caractérisé par le fait que
    la couronne (5) est à symétrie de révolution.
  6. Train d'étirage respectivement rouleau selon revendication 5,
    caractérisé par le fait que
    la couronne est semblable à un cône.
  7. Train d'étirage respectivement rouleau selon revendication 6,
    caractérisé par le fait que
    la couronne possède la forme d'un cône tronqué qui se raccorde au corps de rouleau, et où le plus grand diamètre du cône tronqué n'est au moins pas plus petit que le diamètre de la partie adjacente du corps de rouleau.
  8. Train d'étirage respectivement rouleau selon revendication 7,
    caractérisé par le fait que
    la surface conique de la couronne (5) est formée d'une manière arrondie au moins vers le bord supérieur adjacent au corps de rouleau.
  9. Procédé de filage à nouveau pour une machine à filage fin, selon lequel un fil est déposé derrière la paire de rouleaux délivreurs d'un train d'étirage, et où le fil est guidé près de la paire de rouleaux délivreurs, de telle sorte que, vu dans le sens de transport de fibres, un appareil de manipulation de fil ne puisse pas prendre une position en attente devant la paire de rouleaux délivreurs, sans amener le fil en contact avec une partie d'un rouleau délivreur dans les alentours de l'espace en forme de cale,
    caractérisé par le fait que
    le train d'étirage est formé selon une des revendications 1 à 3, et l'appareil est guidé dans une telle position en attente que le fil touche la couronne, sans être mis en contact avec les parties de rouleau en rotation.
  10. Procédé selon revendication 9, où le fil est guidé a travers un corps de buse, après le train d'étirage,
    caractérisé par le fait
    qu'une boucle de fil est formée entre l'embouchure de l'appareil et l'embouchure du corps de buse, par un mouvement de l'appareil dans la direction du plan médian du train d'étirage.
EP92922973A 1991-11-21 1992-11-16 Banc d'etirage pour machine a filer en fin, en particulier pour machine a filer a filiere Expired - Lifetime EP0568665B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH3411/91 1991-11-21
CH3411/91A CH685123A5 (de) 1991-11-21 1991-11-21 Streckwerk für eine Feinspinnmaschine, insbesondere Düsenspinnmaschine.
PCT/CH1992/000226 WO1993010291A1 (fr) 1991-11-21 1992-11-16 Banc d'etirage pour machine a filer en fin, en particulier pour machine a filer a filiere

Publications (2)

Publication Number Publication Date
EP0568665A1 EP0568665A1 (fr) 1993-11-10
EP0568665B1 true EP0568665B1 (fr) 1996-06-05

Family

ID=4255408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92922973A Expired - Lifetime EP0568665B1 (fr) 1991-11-21 1992-11-16 Banc d'etirage pour machine a filer en fin, en particulier pour machine a filer a filiere

Country Status (7)

Country Link
US (1) US5689945A (fr)
EP (1) EP0568665B1 (fr)
JP (1) JP3258009B2 (fr)
AT (1) ATE138984T1 (fr)
CH (1) CH685123A5 (fr)
DE (1) DE59206498D1 (fr)
WO (1) WO1993010291A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5477591A (en) * 1994-03-17 1995-12-26 Hollingsworth Saco Lowell, Inc. Bearing device for drafting rollers having pressure relieving means
DE102006051875A1 (de) * 2006-10-31 2008-05-08 Maschinenfabrik Rieter Ag Kepa-Streckwerk für eine Spinnmaschine
US10538865B2 (en) * 2016-06-28 2020-01-21 Loftex Usa Llc Method for producing multi-hole ultra soft yarns
DE102017222107B4 (de) * 2017-12-07 2019-10-31 Leoni Bordnetz-Systeme Gmbh Verfahren sowie Vorrichtung zur Herstellung einer Leitung

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1865440U (de) * 1962-10-25 1963-01-10 Baumwollspinnerei Speyer Oberwalze fuer streckwerke.
DE3025032A1 (de) * 1980-07-02 1982-01-21 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Oberwalzentrag- und -belastungsarm fuer streckwerke von spinnereimaschinen
JPS5959925A (ja) * 1982-09-28 1984-04-05 Toyoda Autom Loom Works Ltd 結束紡績装置における糸継方法
DE3413894A1 (de) * 1983-04-15 1984-10-25 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zum ansetzen eines garnendes
IN161355B (fr) * 1983-07-01 1987-11-14 Rieter Ag Maschf
JPS6215331A (ja) * 1985-06-27 1987-01-23 Murata Mach Ltd 空気式紡績機
JPS6324128Y2 (fr) * 1985-08-12 1988-07-01
WO1987003310A1 (fr) * 1985-11-21 1987-06-04 Schubert & Salzer Maschinenfabrik Aktiengesellscha Procede et dispositif de renfilage d'un dispositif a filer pourvu d'un organe tordeur pneumatique
DE3744757A1 (de) * 1987-03-02 1989-01-05 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen einer mit einem pneumatischen drallorgan arbeitenden spinnvorrichtung
US4918913A (en) * 1987-06-12 1990-04-24 Maschinenfabrik Rieter Ag Method of, and device for, performing a start spinning operation for spinning of a yarn in a friction spinning apparatus
IN171166B (fr) * 1987-10-08 1992-08-08 Rieter Ag Maschf
EP0353575B1 (fr) * 1988-08-04 1995-03-08 Maschinenfabrik Rieter Ag Dispositif d'arrêt pour un ruban de fibres
EP0361257A1 (fr) * 1988-09-29 1990-04-04 Maschinenfabrik Rieter Ag Rouleaux d'alimentation dans un train d'étirage
CH676860A5 (fr) * 1988-11-23 1991-03-15 Rieter Ag Maschf
DE3932666C2 (de) * 1989-03-22 2000-12-28 Rieter Ag Maschf Verfahren zum Betrieb einer Spinnmaschine, insbesondere Ringspinnmaschine, sowie Bedienroboter zur Durchführung des Verfahrens
US5138830A (en) * 1989-07-04 1992-08-18 Hans Stahlecker Spinning machine having a plurality of drafting units
DE3927739A1 (de) * 1989-08-23 1991-02-28 Fritz Stahlecker Verfahren und vorrichtung zum falschdrallspinnen
CH679587A5 (fr) * 1989-08-25 1992-03-13 Rieter Ag Maschf
CH679916A5 (fr) * 1989-10-03 1992-05-15 Rieter Ag Maschf
JP2911593B2 (ja) * 1989-12-19 1999-06-23 マシーネンフアブリーク・リーテル・アクチエンゲゼルシヤフト 繊維機械の開口に糸を通すための装置
CH683697A5 (de) * 1990-07-20 1994-04-29 Rieter Ag Maschf Vorrichtung zum automatischen Ansetzen oder Anspinnen eines Fadens und Verfahren zu ihrem Betrieb.
CH682566A5 (de) * 1990-12-06 1993-10-15 Rieter Ag Maschf Düse zur Drallerzeugung in einer Düsenspinnmaschine.
CH684836A5 (de) * 1991-07-25 1995-01-13 Rieter Ag Maschf Verfahren zur Steuerung der Arbeitsabläufe zwischen einem Bedienungsautomaten und einer Spinnstelle einer Textilmaschine.

Also Published As

Publication number Publication date
US5689945A (en) 1997-11-25
JPH06504594A (ja) 1994-05-26
DE59206498D1 (de) 1996-07-11
JP3258009B2 (ja) 2002-02-18
ATE138984T1 (de) 1996-06-15
CH685123A5 (de) 1995-03-31
WO1993010291A1 (fr) 1993-05-27
EP0568665A1 (fr) 1993-11-10

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