EP2726655B1 - Banc à broches destiné à fabriquer une mèche et procédé permettant de commencer à filer un assemblage de fibres - Google Patents

Banc à broches destiné à fabriquer une mèche et procédé permettant de commencer à filer un assemblage de fibres Download PDF

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Publication number
EP2726655B1
EP2726655B1 EP12735433.0A EP12735433A EP2726655B1 EP 2726655 B1 EP2726655 B1 EP 2726655B1 EP 12735433 A EP12735433 A EP 12735433A EP 2726655 B1 EP2726655 B1 EP 2726655B1
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EP
European Patent Office
Prior art keywords
piecing
roving
nozzles
vortex chamber
channel
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Application number
EP12735433.0A
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German (de)
English (en)
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EP2726655A1 (fr
Inventor
Christian Griesshammer
Petr Haska
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP2726655A1 publication Critical patent/EP2726655A1/fr
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    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • 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
    • D01H4/48—Piecing arrangements; Control therefor
    • 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

Definitions

  • the present invention relates to a roving machine for producing a roving from a fiber structure, the roving machine comprising 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 having an inlet mouth, wherein the vortex chamber associated with spinnerets, via the air in the vortex chamber is conductive to give the fiber structure after a piecing in the region of the inlet mouth a protective rotation, and wherein the spindle has a trigger channel through which provided with the protective rotation roving from the vortex chamber is removable.
  • a method is described for piecing a fiber strand on a roving machine used to make a roving.
  • Roving is produced with the aid of roving machines, usually with the aid of stretch-pretreated (eg doubled) slivers, and serves as a template for the subsequent spinning process in which the individual fibers of the roving are spun into a fiber yarn, for example by means of a ring spinning machine ,
  • stretch-pretreated eg doubled
  • slivers serves as a template for the subsequent spinning process in which the individual fibers of the roving are spun into a fiber yarn, for example by means of a ring spinning machine
  • Said strength is important to prevent ripping of the roving during winding on a spool or during the supply to the downstream spinning machine.
  • 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. On the other hand, it must be ensured despite the protective rotation be that the roving can be further processed in a spinning machine - so the roving must continue to be delaying.
  • flyers In order to produce a corresponding roving, so-called 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 ).
  • DE102007006674 and JPH0353569U disclose air spinning devices for making a thread.
  • the roving frame is characterized in that the swirl chamber in which the actual roving is made is associated with piecing nozzles in addition to the spinnerets.
  • the piecing nozzles also each have a flow direction, which is aligned in the direction of the inlet mouth of the spindle.
  • the piecing nozzles are thus aligned in such a way that, during the piecing process, an airflow extending through the inlet mouth into the withdrawal channel can be generated with them. This air flow causes a suction in the region of the inlet opening of the vortex chamber.
  • the air flow generated by the piecing nozzles not only movement of the fiber composite in or through the discharge channel causes. Rather, the Anspinndüsen should be oriented so that the fiber structure in addition also a protective rotation can be issued. As a result, its strength is significantly increased, so that the fiber structure can be taken after passing through the spindle of corresponding handling devices and fed to the further process. As soon as the fiber structure provided with the protective rotation has left the spindle, it is finally possible to start the "normal" spinning process in which the air supply to the piecing nozzles is interrupted and the spinnerets are exposed to air.
  • a roving machine is proposed, with the aid of which the end portion of a correspondingly supplied fiber composite can be spun in the subsequent spinning direction.
  • An elaborate guiding the already produced roving against the spinning direction and thus also through the discharge channel is therefore not necessary.
  • the piecing nozzles are aligned in such a way that individual air streams generated by the piecing nozzles enter tangentially into the withdrawal channel in a plan view of the inlet opening.
  • the air streams also impinge with a tangential component of motion on the fiber structure entering the inlet mouth of the spindle and in this case bring about the desired protective rotation.
  • the air flow must also have a directional component here, which extends into the inlet mouth.
  • the piecing nozzles should generate an air flow which, from the direction of the inlet opening of the vortex chamber with a tangential component, strikes the inner wall of the withdrawal channel and finally propagates with a rotary movement in the direction of the exit of the withdrawal channel.
  • the piecing nozzles are arranged in the axial direction of the discharge channel between the inlet opening of the vortex chamber and the inlet mouth of the spindle. This allows alignment of the piecing nozzles according to the invention without significant modifications of the remaining spinning station being required.
  • the spinnerets are preferably arranged, which are usually oriented such that the generated air flow hits mainly on the outer surface of the spindle to produce the desired protective rotation.
  • the piecing nozzles can also be arranged between the spinnerets and the inlet mouth of the spindle (again viewed in the axial direction of the withdrawal channel). However, it is also conceivable that the spinnerets are located between the inlet opening of the vortex chamber and the piecing nozzles.
  • the piecing nozzles are aligned such that the protective rotation can be dispensed within the withdrawal channel.
  • the rotation of the air flow is in this case particularly stable and uniform, since the discharge channel during the issuance of the protective rotation serves as a guide of the fiber composite.
  • the piecing nozzles are aligned such that the protective rotation can already be dispensed in the region of the inlet mouth.
  • the protective rotation is in this case in the earliest possible stage, so that a particularly high tensile strength can be achieved. The risk that the fiber strand breaks when pulling out of the trigger channel is thereby reduced.
  • it can be influenced by the orientation and placement of the piecing nozzles to determine whether the protective rotation is given primarily in the area of the inlet mouth or inside the outlet channel.
  • the piecing nozzles are arranged at least partially in a wall section surrounding the vortex chamber.
  • the piecing nozzles can be securely fastened and precisely aligned with the inlet mouth of the spindle.
  • the piecing nozzles can in this case be drilled into the wall or else be connected to it in a different manner, in particular detachably in the form of inserts.
  • the number of piecing nozzles is freely selectable, and it has proved advantageous to distribute the piecing nozzles evenly around the inlet mouth.
  • 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, and that the piecing nozzles are at least partially disposed in the fiber guiding element.
  • fiber guide elements which usually lead the fiber structure between a drafting system and the inlet opening of the vortex chamber, usually adapted to the fiber material to be spun. If the piecing nozzles are now arranged inside this fiber guiding element, they too can be adapted to the corresponding fiber material in terms of arrangement, number and orientation. By changing the fiber guide element, the roving machine is thus not only suitable for spinning the corresponding fiber material into a roving.
  • the piecing nozzles are also designed for the fiber material to be spinned so that a problem-free piecing thereof can take place in the direction of the later spinning direction.
  • the piecing nozzles can be acted upon with air independently of the spinnerets in order to realize an individually adaptable air flow.
  • the piecing nozzles can operate exclusively the piecing nozzles and during the subsequent spinning process exclusively the spinnerets, ie. H. to apply air.
  • a certain air flow is generated by the spinnerets.
  • the roving machine has a control and / or regulating unit which is designed to apply exclusively the piecing nozzles during the piecing process and, during a spinning process following the piecing process, exclusively to apply air to the spinnerets. Both arrangements can thus be designed specifically for their respective task, without having to take into account a mutual interplay of the individual air flows.
  • the switching on and off of the respective nozzles can be done for example by means of appropriate valves.
  • the respective application of air can also be done manually or automatically, for example on the basis of measured quality characteristics of the produced roving.
  • the inventive method is finally characterized by the fact that for spinning a fiber strand a roving described above is used, wherein the fiber strand is moved during the piecing with the aid of the Anspinndüsen air flow in a linear movement in the discharge channel, and wherein the Fiber structure is given by the air flow in addition to the linear movement a protective rotation.
  • the inventive method thus allows a "forward spinning", ie a piecing, in which the fiber strand during piecing in the direction of the later spinning direction (from the inlet opening of the vortex chamber via the vortex chamber into the discharge channel of the spindle) introduced into the vortex chamber and through the Air flow is guided in the inlet mouth of the spindle.
  • the piecing nozzles are subjected to air in order to promote an intended for piecing end portion of the fiber assembly via the inlet mouth in the discharge channel of the spindle and to provide a protective rotation that the protective rotation end portion after passing through the discharge channel can be taken over by a handling device, and that for the production of the roving after completion of the piecing process only the spinnerets are exposed to air.
  • the respective nozzles can be optimally aligned in this way to their respective task (piecing a fiber composite to produce a roving). A mutual influence of the respective air flows, however, does not take place.
  • the Fig. 1 shows a schematic view of a section of a roving machine.
  • the roving machine can comprise a drafting device 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 a pair of take-off rollers 17 and a pair of withdrawal rollers 17 downstream Aufwindevoriques 16 (also shown schematically) with a coil 14 for winding the spinning unit 3 leaving and the desired protective rotation having roving 1 include.
  • the device according to the invention need not necessarily have a drafting device 15, as shown in FIG FIG. 1 is shown. Also, the pair of withdrawal rollers 17 is not mandatory.
  • the spinning device operates on an air spinning process.
  • the fiber structure 2 is now passed through a fiber inlet channel 13 having a corresponding inlet opening 7 of a fiber guide element 12 and from there via an inlet opening 5 in the swirl chamber 4 of the spinning station 3 (see also FIG. 2 ).
  • a protective rotation ie at least part of the fibers of the fiber composite 2 is detected by an air flow, which is generated by correspondingly arranged in a vortex chamber 4 limiting wall portion 11 spinnerets 19.
  • a part of the fibers is here from the fiber structure 2 at least one piece pulled out and wound around the top of a projecting into the swirl chamber 4 spindle 6.
  • the spinnerets 19 it should be mentioned as a precautionary measure at this point that they should as a rule be aligned so that the exiting air jets are rectified in order to jointly produce a rectified air flow with a direction of rotation.
  • the individual spinnerets 19 are arranged in this case rotationally symmetrical to each other.
  • the spinning station 3 according to the invention preferably also has a swirl-blocking element, for example, inserted into the fiber-guiding element 12.
  • a swirl-blocking element for example, inserted into the fiber-guiding element 12.
  • This can be designed as a fiber delivery edge, as a pin or in another known from the prior art embodiment and prevents rotation in the fiber structure 2 against the delivery direction of the fiber composite 2 and thus propagates in the direction of the inlet opening 14 of the fiber guide element 12.
  • Fig. 3 to 5 remove The core of the present invention can now be the Fig. 3 to 5 remove. While the Fig. 3 and 4 show two alternative embodiments of a spinning station 3 according to the invention, which differ only in the positioning of Anspinndüsen 8 described below, shows Fig. 5 a schematic sectional view of a spinning station 3 according to the invention as a plan view of the inlet mouth 10 of the centrally disposed spindle. 6
  • the roving machine according to the invention in addition to those associated with the Fig. 1 and 2 spinnerets 19 described two Anspinndüsen invention 8 on.
  • these piecing nozzles 8 (which, incidentally, can also be formed as flow gaps or other elements generating a corresponding air flow) are the following: As soon as a corresponding piecing process is pending, the piecing nozzles 8 are subjected to compressed air, the spinning nozzles 19 responsible for the spinning process being or being shut down (ie their air supply is interrupted). Since the Anspinndüsen 8 and whose longitudinal axes are now aligned in the direction of the inlet port 10 of the spindle 6, an air flow, which extends over the inlet port 10 into the discharge channel 9 of the spindle 6. In the region of the inlet opening 7 of the fiber guide element 12 therefore creates a suction.
  • a fiber structure 2 is conveyed into the fiber guide channel 13, then it is sucked into the vortex chamber 4 by the said suction.
  • the alignment of the piecing nozzles 8 causes the fiber structure 2 to be sucked in the direction of the inlet mouth 10 of the spindle 6.
  • the invention additionally provides that the piecing nozzles 8 are aligned so that the fiber structure 2 undergoes not only a linear movement but at the same time also a certain protective rotation.
  • the piecing nozzles 8 are therefore arranged such that the generated air flow in a plan view of the spindle 6 (see Fig. 5 ) enters the inlet mouth 10 approximately tangentially. If the air flow now hits the surface of the fiber composite 2 during its passage, the fiber structure 2 is given a protective rotation.
  • the protective rotation can in this case already be granted in the region of the inlet orifice 10 or during transport through the outlet channel 9, wherein rotational strength, angle of rotation and exact location of the protective rotation distribution can be influenced by the corresponding orientation of the piecing nozzles 8.
  • the fiber structure 2 receives by granting the protective rotation of a tensile strength, which allows to grip the fiber structure 2 after passing through the discharge channel 9 and z. B. the winding device 16 supply.
  • the air supply to the piecing nozzles 8 is interrupted again.
  • the spinnerets 19 are exposed to air to produce the desired roving 1.
  • the respective air flows are in Fig. 5 represented by corresponding arrows, it being again pointed out that it is advantageous that during only the piecing nozzles 8 and during the spinning process (ie the production of the roving 1) of the piecing exclusively the spinnerets 19 are subjected to air ( Fig. 5 So does not mean that the spinnerets 19 and the piecing nozzles 8 at the same time have to generate corresponding air currents).
  • the inner diameter A of the inlet port 10 (see Fig. 3 ) of the spindle 6 has a value between 4 mm and 12 mm, preferably between 6 mm and 8 mm.
  • the invention is not limited to the illustrated embodiments. Rather, all combinations of the individual features described, as shown or described in the claims, the description and the figures and as far as a corresponding combination is technically possible or seems reasonable, the subject of the invention. Thus, for example, in addition to the piecing nozzles 8 shown, more piecing nozzles 8 may be present.

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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 filature (3) qui comporte une chambre de turbulence (4), pourvue d'une ouverture d'entrée (5) destinée à l'ensemble de fibres (2), et un élément de formation de mèche s'étendant au moins partiellement jusque dans la chambre de turbulence (4) et se présentant sous la forme d'une broche (6) pourvue d'une embouchure d'entrée (10), la chambre de turbulence (4) étant associée à des filières (19) permettant de guider l'air jusque dans la chambre de turbulence (4) pour appliquer à l'ensemble de fibres (2) une torsion de protection après un processus de début de filage dans la région de l'embouchure d'entrée (10), et la broche (6) comportant un conduit de retrait (9) par lequel la mèche (1) pourvue de la torsion de protection peut être retirée de la chambre de turbulence (4), la chambre de turbulence (4) étant en outre associée à des buses de début de filage (8) et les buses de début de filage (8) présentant chacune une direction d'écoulement qui est orientée en direction de l'embouchure d'entrée (10) de la broche (6), caractérisé en ce que les buses de début de filage (8) sont orientées de telle sorte que des flux d'air individuels, générés par les buses de début de filage (8), pénètre tangentiellement dans le conduit de retrait (9) dans une vue de dessus de l'embouchure d'entrée (10) et en ce que les buses de début de filage (8) peuvent être alimentées en air indépendamment des filières (19).
  2. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce que les buses de début de filage (8) sont disposées, lorsque l'on regarde dans la direction axiale du conduit de retrait (9), entre l'ouverture d'entrée (5) de la chambre de turbulence (4) et l'embouchure d'entrée (10) de la broche (6).
  3. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce que les buses de début de filage (8) sont orientées de telle sorte que la torsion de protection peut être appliquée à l'intérieur du conduit de retrait (9).
  4. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce que les buses de début de filage (8) sont orientées de telle sorte que la torsion de fabrication peut être appliquée dans la région de l'embouchure d'entrée (10).
  5. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce que les buses de début de filage (8) sont disposées au moins partiellement dans une partie de paroi (11) entourant la chambre de turbulence (4).
  6. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce qu'un élément de guidage de fibres (12) pourvu d'un conduit de guidage de fibres (13) est monté en amont de la chambre de turbulence (4), ledit conduit débouchant dans l'ouverture d'entrée (5) de la chambre de turbulence (4), et en ce que les buses de début de filage (8) sont disposées au moins partiellement dans l'élément de guidage de fibres (12).
  7. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce que le banc à broches comporte une unité de commande et/ou de réglage qui est conçue pour alimenter en air, pendant le processus de début de filage, seulement les buses de début de filage (8) et, pendant une opération de filage suivant le processus de début de filage, seulement les filières (19).
  8. Banc à broches selon l'une au moins des revendications précédentes, caractérisé en ce que l'embouchure d'entrée (10) de la broche (6) a un diamètre intérieur (A) dont la valeur est comprise entre 4 mm et 12 mm, de préférence entre 6 mm et 8 mm.
  9. Procédé de début de filage d'un ensemble de fibres (2) sur un banc à broches servant à la fabrication d'une mèche (1), caractérisé par l'utilisation d'un banc à broches selon l'une au moins des revendications précédentes, l'ensemble de fibres (2) étant déplacé suivant un mouvement linéaire jusque dans le conduit de retrait (9) pendant le processus de début de filage à l'aide du flux d'air généré par les buses de début de filage (8), et une torsion de protection étant appliquée à l'ensemble de fibres (2) en plus du mouvement linéaire au moyen du flux d'air.
  10. Procédé selon la revendication précédente, caractérisé en ce que, pendant le processus de début de filage, seules les buses de début de filage (8) sont alimentées en air pour transporter une partie d'extrémité, destinée au début de filage, de l'ensemble de fibres (2) jusque dans le conduit de retrait (9) de la broche (6) par l'embouchure d'entrée (10) et pour y appliquer une torsion de protection, en ce que la partie d'extrémité, pourvue de la torsion de protection, est prise en charge par un dispositif de manipulation après passage dans le conduit de retrait (9) et en ce que, pour fabriquer la mèche (1), seules les filières (19) sont alimentées en air une fois que le processus de début de filage (19) est terminé.
  11. Procédé selon l'une au moins des revendications 9 et 10, caractérisé en ce que, après passage par le conduit de retrait (9), la partie d'extrémité, pourvue de la torsion de protection, est enroulée sur une bobine (14) à l'aide d'un dispositif d'enroulement (16).
EP12735433.0A 2011-07-01 2012-06-29 Banc à broches destiné à fabriquer une mèche et procédé permettant de commencer à filer un assemblage de fibres Active EP2726655B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01108/11A CH705221A1 (de) 2011-07-01 2011-07-01 Vorspinnmaschine zur Herstellung eines Vorgarns sowie Verfahren zum Anspinnen eines Faserverbands.
PCT/CH2012/000145 WO2013003962A1 (fr) 2011-07-01 2012-06-29 Banc à broches destiné à fabriquer une mèche et procédé permettant de commencer à filer un assemblage de fibres

Publications (2)

Publication Number Publication Date
EP2726655A1 EP2726655A1 (fr) 2014-05-07
EP2726655B1 true EP2726655B1 (fr) 2019-05-29

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Application Number Title Priority Date Filing Date
EP12735433.0A Active EP2726655B1 (fr) 2011-07-01 2012-06-29 Banc à broches destiné à fabriquer une mèche et procédé permettant de commencer à filer un assemblage de fibres

Country Status (6)

Country Link
US (1) US9238881B2 (fr)
EP (1) EP2726655B1 (fr)
JP (1) JP6045577B2 (fr)
CN (1) CN103827365B (fr)
CH (1) CH705221A1 (fr)
WO (1) WO2013003962A1 (fr)

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CH709953A1 (de) * 2014-07-30 2016-02-15 Rieter Ag Maschf Verfahren zum Betrieb einer Luftspinnmaschine.
CH712409A1 (de) * 2016-04-29 2017-10-31 Rieter Ag Maschf Luftspinnmaschine sowie Verfahren zur Herstellung eines Garns.
IT201600070676A1 (it) * 2016-07-07 2018-01-07 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet
CH712663A1 (de) * 2016-07-14 2018-01-15 Rieter Ag Maschf Verfahren zum Verarbeiten eines strangförmigen Faserverbands sowie Vorspinnmaschine.
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IT201800009728A1 (it) * 2018-10-24 2020-04-24 Savio Macch Tessili Spa Dispositivo di filatura di tipo air-jet
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CN103827365B (zh) 2017-03-15
WO2013003962A1 (fr) 2013-01-10
CH705221A1 (de) 2013-01-15
CN103827365A (zh) 2014-05-28
US20140208711A1 (en) 2014-07-31
JP6045577B2 (ja) 2016-12-14
JP2014522919A (ja) 2014-09-08
US9238881B2 (en) 2016-01-19
EP2726655A1 (fr) 2014-05-07

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