EP2511403B1 - Banc à broches pour la fabrication d'une mèche - Google Patents

Banc à broches pour la fabrication d'une mèche Download PDF

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Publication number
EP2511403B1
EP2511403B1 EP12001495.6A EP12001495A EP2511403B1 EP 2511403 B1 EP2511403 B1 EP 2511403B1 EP 12001495 A EP12001495 A EP 12001495A EP 2511403 B1 EP2511403 B1 EP 2511403B1
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EP
European Patent Office
Prior art keywords
roving
spindle
vortex chamber
machine according
fiber
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.)
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Application number
EP12001495.6A
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German (de)
English (en)
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EP2511403A1 (fr
Inventor
Dorothee Betz
Simon Küppers
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
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Maschinenfabrik Rieter AG
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2511403A1 publication Critical patent/EP2511403A1/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the present invention relates to a roving machine for producing a roving from a fiber structure, wherein the roving machine comprises at least one spinning station having a swirl chamber with an inlet opening for the fiber structure and a roving forming element at least partially extending into the swirl chamber in the form of a spindle, wherein the swirl chamber at least one air nozzle is assigned, can be conducted via the air into the vortex chamber, and wherein the spindle has a discharge channel through which the roving from the vortex chamber is removable.
  • Roving machines for the production of roving from sliver pretreated (eg doubled) slivers, which are usually pretreated by means of stretching, have been known for a long time in the prior art.
  • the roving in turn serves as a template for the subsequent spinning process, in which the individual fibers of the roving, for example by means of a ring spinning machine, are spun into a fiber yarn.
  • it has been proven to stretch the fiber structure presented by means of a drafting system, which is usually part of the roving, and then provided with a protective rotation in order to give the roving a certain strength. This strength is important to prevent the roving on winding on a corresponding coil or during the supply to the downstream spinning machine breaks.
  • the protective rotation granted may only be so strong that a cohesion of the individual fibers is ensured during the individual winding and unwinding operations as well as corresponding transport processes between the respective machine types.
  • the protective rotation it must be ensured that the roving can be further processed in a spinning machine - the roving must therefore continue to be delayable or be resolvable again into its individual fibers.
  • flyers are primarily used, but their delivery speed is limited due to centrifugal forces occurring. Therefore, there were already many suggestions to bypass the flyer or to replace it with an alternative machine type (see for example EP 0 375 242 A2 . DE 32 37 989 C2 ).
  • the protective rotation is generated by means of air currents.
  • the basic principle is to guide a fiber structure through a vortex chamber in which an air vortex is generated. This finally causes a part of the outer fibers to be wound around the centrally extending fiber strand as so-called binding fibers, which in turn consists essentially of mutually parallel core fibers.
  • the object of the present invention is thus to propose a roving machine with the aid of which a roving can be produced using a corresponding air flow, which roving is suitable for spinning in a subsequent spinning machine.
  • the roving machine is characterized in that the roving forming element formed as a spindle has a discharge channel through which the roving from the swirl chamber is deducted, wherein the discharge channel in the region of the swirl chamber has an inlet mouth for the roving having a diameter deducted from the swirl chamber whose Amount between 4 mm and 12 mm, preferably between 6 mm and 8 mm.
  • the diameter is less than 4 mm, it is gradually brought into the range known from conventional air-spinning, which results in a relatively firm yarn which is only partially suitable as a roving.
  • the air pressure of the air supplied via the air nozzles must be significantly increased to ensure the necessary vortex flow within the vortex chamber, since a portion of the incoming air leaves the vortex chamber via the inlet mouth of the spindle without Contribute to vortex formation.
  • the spindle has an outer diameter at least in the region of the inlet opening, the amount of which lies between 5 mm and 14 mm, preferably between 10.0 mm and 11.5 mm.
  • the later Umwindefasern be bent by the air flow in the region of the spindle tip, which adjoins the inlet mouth of the spindle, and finally lie down around the core fibers.
  • the extent to which the fibers are bent over depends in particular on the outer diameter of the spindle in the region of the inlet mouth. Thus, a smaller outer diameter causes a stronger bending and vice versa.
  • the spindle has in the area of its inlet orifice an outer lateral surface which enables an optimal angular velocity of the air turbulence generated by the air flowing into the vortex chamber.
  • a smaller diameter would lead to increased angular velocity, causing the capstan fibers to be rotated too much, resulting in increased guard rotation and loss of forgeability. While an outer diameter lying above 14 mm would result in too low an angular velocity and thus an insufficient defensive rotation.
  • the spindle at least in the region of the inlet mouth, has a wall thickness which amounts to between 0.5 mm and 5.0 mm, preferably between 1.0 mm and 2.5 mm, more preferably an amount of 1 , 25 mm.
  • an outer diameter of the spindle can be realized within the above limits while maintaining the area of the inlet opening according to the invention.
  • the wall thickness can be over the entire length of the spindle in the said range, in particular also be constant.
  • the vortex chamber has an inner diameter at least in the area of the inlet mouth of the spindle, which has an amount of between 10 mm and 16 mm, preferably between 12 mm and 14 mm, more preferably an amount of 12.5 mm.
  • the distance between the inlet opening of the vortex chamber and the inlet mouth of the spindle is 2.5 mm to 11.0 mm, preferably 3.5 mm to 6.5 mm.
  • the production of the protective rotation should take place in the area of the vortex chamber.
  • the swirl of the fiber composite propagates counter to the direction of movement of the fiber composite in an area outside the swirl chamber, since this could lead to only very few fibers protruding or being able to be pulled far enough out of the fiber structure, to be caught by the air flow and wound as Umwindemaschinen around the core fibers.
  • the desired generation of the protective rotation would thus no longer be possible to a sufficient extent.
  • the distance between the inlet opening of the vortex chamber and the inlet mouth of the spindle is chosen to be too high, then the effect of the air vortex results in a torque which is large enough to cause the unwanted propagation of a twist of the fiber structure. If the said distance is less than 2.5 mm, it has been found that the surface of attack for the air is too low to produce the desired protective rotation.
  • the at least one air nozzle and the inlet mouth of the spindle in the axial direction of the spindle longitudinal axis 2 mm to 6 mm, preferably 3 mm to 4 mm are spaced apart.
  • the air nozzles which are usually arranged around the vortex chamber in multiple designs, generally enter the vortex chamber tangentially. The air spreads in a laval nozzle-shaped club shape. Part of this club hits the spindle tip, where it is deflected and finally captures fibers in order to wrap them around the core fibers in the form of wraparound fibers.
  • the distance between the inlet mouth and the air nozzle (s) is less than 2 mm, it is only possible to some extent to loosen fibers from the current fiber structure, since the possible attack surface is too small. Thus, not enough fiber ends are available that can serve as Umwindemaschinen.
  • a distance of more than 6 mm causes a detachment of potential wraparound fibers is also difficult, as a significant proportion of the air flowing into the vortex chamber air flows into the spindle via the inlet port. This air is finally no longer available for the necessary vortex formation within the vortex chamber, so that the production of the desired roving is no longer possible.
  • the vortex chamber is preceded by a fiber guide element with a fiber guide channel, which opens into the inlet opening of the vortex chamber.
  • the fiber guide element is used in this case the controlled guidance of the fiber composite in the area in front of the actual vortex chamber of the roving.
  • corresponding roving machines on a drafting preferably a Riemchenstrecktechnik on, in which the fiber strand is stretched before entering the vortex chamber and thereby evened. If the fiber structure were then transferred into the vortex chamber without guidance, it would possibly lead to thinnings or thick spots within the fiber structure. This can finally be counteracted by the use of a fiber guide element.
  • the fiber guide element in the region of the sliver outlet (which merges into the inlet opening of the vortex chamber) comprise a so-called twist dam element, which may be formed, for example, as an edge, pin, twisted surface, as a cone or in the form of several staggered individual elements and with the Fiber structure is in contact.
  • the spin damper element prevents the swirl of the fiber composite generated in the swirl chamber from propagating in the direction of the fiber guiding element and thereby preventing the subsequent generation of the protective rotation within the swirl chamber, since it would no longer be possible to detach the fiber ends from the fiber strand and to convert them as swaddling fibers to loop the core fibers.
  • the fiber guide channel while maintaining the inventive diameter of the inlet mouth of the spindle has a length whose amount is between 4 mm and 12 mm, preferably between 6.0 mm and 9.5 mm. Said length allows a safe guidance of the fiber assembly of corresponding upstream units, such as a Riemchenstrecktechnik, in the field of the vortex chamber, without excessive friction between the fiber structure and the inner wall of the fiber guide channel must be feared.
  • the fiber guide channel on its side facing away from the inlet opening of the vortex chamber side has an inlet opening for the fiber structure with a height whose amount is between 2 mm and 10 mm, preferably between 4 mm and 5 mm.
  • the fiber guide channel on its side facing away from the inlet opening of the vortex chamber side has an inlet opening for the fiber structure with a width whose amount is between 5 mm and 12 mm, preferably between 7 mm and 8 mm.
  • the width is in this case of the order of the diameter of the inlet mouth of the spindle.
  • the ratio between the width of the inlet opening of the vortex chamber and the diameter of the inlet mouth of the spindle is between 2.0 and 0.5, preferably between 1.4 and 0.8. This will ensure that the fibers can be taken over the entire width of the fiber composite or the roving produced therefrom as straight as possible in the spindle and can be deducted in this way from the vortex chamber.
  • a roving can be made even at a deviating from the above limits ratio between the width of the inlet opening of the vortex chamber and the diameter of the inlet mouth of the spindle.
  • the resulting properties of the roving are only very close to the optimum to be achieved while maintaining the inventive diameter of the inlet mouth of the spindle, although the above ratio is selected accordingly.
  • a roving machine which makes it possible to produce a roving from a fiber structure with the aid of corresponding air flows within a swirl chamber.
  • the delivery speed can in this case by the inventive choice of individual parameters in conjunction with an inlet mouth of the spindle, which has a diameter according to claim 1, compared to conventional roving, z. B. in the form of a flyer, be increased considerably.
  • a particularly advantageous relationship between strength and resilience is finally obtained when the above diameter is between 6 mm and 8 mm.
  • the FIG. 1 shows a schematic view of a section of a roving machine according to the invention.
  • the roving frame can comprise a drafting system 15, which is supplied with a fiber structure 2, for example in the form of a relined strip conveyor.
  • the roving frame shown in principle comprises a spaced apart from the drafting 15 spinning station 3 with an internal swirl chamber 4, in which the fiber structure 2 or at least a portion of the fibers of the fiber composite 2 is provided with a protective rotation (the exact mode of operation of the spinning station 3 is hereinafter will be described in more detail).
  • the roving machine, a pair of take-off rollers 17 and a Abziehevalpres 17 downstream winding device 16 (also shown schematically) for the roving 1 include.
  • the inventive device does not necessarily have a drafting system 15, as in FIG. 1 is shown.
  • the pair of withdrawal rollers 17 is not mandatory.
  • the spinner works by a special air spinning process, which was originally used to make a finished yarn.
  • roving 1 Even though there are already hints in the prior art to also produce roving 1 with the aid of an air spinning system, there has hitherto been a lack of concrete dimensions with regard to the relevant diameter or spacing of individual components the actual spinning station 3. However, it has been shown that the choice of the correct amounts is decisive for the properties of the subsequent roving 1.
  • Essential for the production of roving 1 is namely that the introduced via an inlet opening 5 in the swirl chamber 4 fiber structure 2 is only given a protective rotation so that the roving 1 produced thereby for further processing in a subsequent spinning machine, such as a ring spinning machine, remains delayable .
  • conventional air-spinning devices impart to the fiber structure 2 such a strong rotation that the necessary distortion following the yarn production is no longer possible. This is also desirable in this case, since conventional air spinning machines are designed to produce a finished yarn, which should usually be characterized by a high strength.
  • a protective rotation ie at least part of the fibers of the fiber composite 2 are detected by an air flow which is generated by correspondingly arranged in a vortex chamber 4 bounding wall air nozzles 8.
  • a part of the fibers is in this case pulled out of the fiber structure 2 at least a little bit and wound around the tip of a projecting into the swirl chamber 4 spindle 6.
  • the spinning station 3 preferably has a swirl-blocking element 7 which is inserted, for example, in the fiber guiding element 12, which in the case of Figures 2 and 3 designed as a pin.
  • This serves essentially as a "false yarn core” and ensures that a rotation propagates in the fiber structure 2 counter to the delivery direction of the fiber composite 2 and thus in the direction of the inlet opening 14 of the fiber guide element 12.
  • FIG. 3 take the in FIG. 3 shown area "W" in an identical manner, among other details.
  • the area "W” corresponds to FIG. 2 thus the representation, as well as it FIG. 3 can be seen.
  • the diameter F of the inlet mouth 10 of the spindle 6 has a value between 4 mm and 12 mm, preferably between 6 mm and 8 mm. Due to the significant deviation from the corresponding inner diameter of a spindle 6, as used in conventional air spinning devices used, finally obtained the desired roving 1. This is characterized by the above-mentioned protective rotation of the roving 1, the necessary strength but also the necessary delay lends to spin it in a subsequent spinning machine can. On the other hand, the said diameter is outside the above limits, the strength is increased too much.
  • a roving machine is proposed with the aid of which a roving 1 can be produced that has substantially the same properties as a roving 1 produced using a conventional flyer.

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

Claims (11)

  1. Banc à broches destiné à la fabrication d'une mèche (1) à partir d'un ensemble de fibres (2), le banc à broches comprenant au moins un poste de filage (3) qui présente une chambre de turbulence (4) munie d'une ouverture d'entrée (5) pour l'ensemble de fibres (2) et un élément de formation de mèche constitué par une broche (6) et engagé au moins partiellement dans la chambre de turbulence (4), dans lequel, à la chambre de turbulence (4), est associée au moins une buse d'air (8) à travers laquelle de l'air peut être introduit dans la chambre de turbulence (4) et dans lequel la broche (6) présente un canal d'extraction (9) par lequel la mèche (1) peut être extraite de la chambre de turbulence (4), caractérisé par le fait que le canal d'extraction (9) présente, dans la région de la chambre de turbulence (4) une bouche d'admission (10) pour la mèche (1) qu'il s'agit d'extraire de la chambre de turbulence (4), laquelle bouche présente un diamètre (F) dont la grandeur est comprise entre 4 mm et 12 mm, de préférence entre 6 mm 8 mm.
  2. Banc à broches selon la revendication 1, caractérisé par le fait que la broche (6) présente, au moins dans la région de la bouche d'admission (10), un diamètre extérieur (B) dont la grandeur est comprise entre 5 mm et 14 mm, de préférence entre 10,0 mm et 11,5 mm.
  3. Banc à broches selon une ou plusieurs des revendications précédentes, caractérisé par le fait que la broche (6) possède, au moins dans la région de la bouche d'admission (10), une épaisseur de paroi (A) qui présente une grandeur comprise entre 0,5 mm et 5,0 mm, de préférence entre 1,0 mm et 2,5 mm, de façon encore plus préférée, une grandeur de 1,25 mm.
  4. Banc à broches selon une ou plusieurs des revendications précédentes, caractérisé par le fait que la chambre de turbulence (4) possède, au moins dans la région de la bouche d'admission (10) de la broche (6), un diamètre intérieur (C) qui présente une grandeur comprise entre 10 mm et 16 mm, de préférence entre 12 mm et 14 mm et, de façon encore plus préférée, une grandeur de 12,5 mm.
  5. Banc à broches selon une ou plusieurs des revendications précédentes, caractérisé par le fait que la distance (E) entre l'ouverture d'entrée (5) de la chambre de turbulence (4) et la bouche d'admission (10) de la broche (6) est de 2,5 mm à 11,0 mm, de préférence de 3,5 mm à 6,5 mm.
  6. Banc à broches selon une ou plusieurs des revendications précédentes, caractérisé par le fait qu'entre la buse d'air ou les buses d'air (8) et la bouche d'admission (10) de la broche (6) est ménagé, dans la direction axiale de l'axe longitudinal de la broche, un écartement (D) qui vaut entre 2 mm et 6 mm, de préférence entre 3 mm et 4 mm.
  7. Banc à broches selon une ou plusieurs des revendications précédentes, caractérisé par le fait qu'en amont de la chambre de turbulence (4) est placé un élément de guidage de fibres (12) comportant un canal de guidage de fibres (13) qui débouche dans l'ouverture d'entrée (5) de la chambre de turbulence (4).
  8. Banc à broches selon la revendication précédente, caractérisé par le fait que le canal de guidage de fibres (13) présente une longueur (K) dont la grandeur est comprise entre 4 mm et 12 mm, de préférence entre 6,0 mm et 9,5 mm.
  9. Banc à broches selon une ou plusieurs des revendications 7 et 8, caractérisé par le fait que le canal de guidage de fibres (13) présente, sur son côté éloigné de l'ouverture d'entrée (5) de la chambre de turbulence (4), une ouverture d'introduction (14) pour l'ensemble de fibres (2) ayant une hauteur (H) dont la grandeur est comprise entre 2 mm et 10 mm, de préférence entre 4 mm et 5 mm.
  10. Banc à broches selon une ou plusieurs des revendications 7 à 9, caractérisé par le fait que le canal de guidage de fibres (13) présente, sur son côté qui est éloigné de l'ouverture d'entrée (5) de la chambre de turbulence (4), une ouverture d'introduction (14) pour l'ensemble de fibres (2) possédant une largeur (G) dont la grandeur est comprise entre 5 mm et 12 mm, de préférence entre 7 mm et 8 mm.
  11. Banc à broches selon une ou plusieurs des revendications précédentes, caractérisé par le fait que le rapport entre la largeur de l'ouverture d'entrée (5) de la chambre de turbulence (4) et le diamètre (S) de l'ouverture d'admission (10) de la broche (6) est compris entre 2,0 et 0,5, de préférence entre 1,4 et 0,8.
EP12001495.6A 2011-04-13 2012-03-06 Banc à broches pour la fabrication d'une mèche Active EP2511403B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00653/11A CH704780A1 (de) 2011-04-13 2011-04-13 Vorspinnmaschine zur Herstellung eines Vorgarns.

Publications (2)

Publication Number Publication Date
EP2511403A1 EP2511403A1 (fr) 2012-10-17
EP2511403B1 true EP2511403B1 (fr) 2014-04-30

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Application Number Title Priority Date Filing Date
EP12001495.6A Active EP2511403B1 (fr) 2011-04-13 2012-03-06 Banc à broches pour la fabrication d'une mèche

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US (1) US8607540B2 (fr)
EP (1) EP2511403B1 (fr)
JP (1) JP6008547B2 (fr)
CN (1) CN102733018B (fr)
BR (1) BR102012007028B1 (fr)
CH (1) CH704780A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012108613A1 (de) * 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinnstelle einer Vorspinnmaschine
CH709694A1 (de) * 2014-05-26 2015-11-30 Rieter Ag Maschf Spinnereivorbereitungsmaschine zum Herstellen eines Vorgarns.
CH709693A1 (de) * 2014-05-26 2015-11-30 Rieter Ag Maschf Verfahren zum Betreiben einer Textilmaschine sowie Textilmaschine zur Herstellung von Vorgarn.
CH712663A1 (de) 2016-07-14 2018-01-15 Rieter Ag Maschf Verfahren zum Verarbeiten eines strangförmigen Faserverbands sowie Vorspinnmaschine.
CH713018A1 (de) 2016-10-07 2018-04-13 Rieter Ag Maschf Vorspinnmaschine sowie Verfahren zur Produktion von Vorgarn.
IT201800009728A1 (it) * 2018-10-24 2020-04-24 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet
JP2021042508A (ja) * 2019-09-13 2021-03-18 村田機械株式会社 空気紡績装置及び空気紡績機
JP2021042510A (ja) * 2019-09-13 2021-03-18 村田機械株式会社 紡績ユニット、空気紡績装置、紡績機、及び紡績方法

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FR2367841A1 (fr) * 1976-10-15 1978-05-12 Asa Sa Procede et dispositif pour l'obtention d'un file de fibres
JPS6056817B2 (ja) 1981-10-13 1985-12-12 村田機械株式会社 紡績糸
CA2005018A1 (fr) * 1988-12-12 1990-06-12 Elbert F. Morrison Filature de meche, sous vide
US5263310A (en) * 1990-02-20 1993-11-23 Murata Kikai Kabushiki Kaisha Spinning apparatus
JPH0673618A (ja) * 1992-08-24 1994-03-15 Murata Mach Ltd 紡績装置
EP0990719B1 (fr) * 1998-10-02 2003-05-28 W. SCHLAFHORST AG & CO. Métier à filer
JP4921685B2 (ja) * 2000-09-22 2012-04-25 マシーネンファブリク リーター アクチェンゲゼルシャフト 紡績装置
DE10251727A1 (de) * 2002-11-05 2004-05-13 Deutsches Institut für Textil- und Faserforschung Stuttgart - Stiftung des öffentlichen Rechts Verfahren und Vorrichtung zur Herstellung von Flyerlunte
CN1882728B (zh) * 2003-09-12 2010-09-01 里特机械公司 并条-头道粗纱联合机和用于从纤维组中制造粗纱的方法
WO2005026420A1 (fr) * 2003-09-12 2005-03-24 Maschinenfabrik Rieter Ag Ensemble banc d'etirage-banc a broches permettant de produire une meche par un procede de filage pneumatique
EP1778901B1 (fr) * 2004-08-20 2011-07-06 Maschinenfabrik Rieter Ag Broche a canal d'injection et procede de rattachement pour une machine a filer a jet d'air
DE102005022187A1 (de) * 2005-05-13 2006-11-16 Saurer Gmbh & Co. Kg Anspinnverfahren an einer Luftspinnmaschine sowie Spinnvorrichtung und Luftspinnmaschine
CN2835273Y (zh) * 2005-11-23 2006-11-08 东华大学 新型喷气涡流纺喷嘴装置
DE102009034206A1 (de) * 2009-07-17 2011-01-27 Maschinenfabrik Rieter Ag Bauteil für eine Luftdüsenspinnvorrichtung

Also Published As

Publication number Publication date
EP2511403A1 (fr) 2012-10-17
CH704780A1 (de) 2012-10-15
US8607540B2 (en) 2013-12-17
US20120285134A1 (en) 2012-11-15
CN102733018B (zh) 2017-03-22
JP2012219427A (ja) 2012-11-12
BR102012007028B1 (pt) 2019-11-19
CN102733018A (zh) 2012-10-17
BR102012007028A2 (pt) 2013-06-11
JP6008547B2 (ja) 2016-10-19

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