EP3953507B1 - Peigneuse pour ligne de préparation de filature - Google Patents

Peigneuse pour ligne de préparation de filature Download PDF

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Publication number
EP3953507B1
EP3953507B1 EP20718777.4A EP20718777A EP3953507B1 EP 3953507 B1 EP3953507 B1 EP 3953507B1 EP 20718777 A EP20718777 A EP 20718777A EP 3953507 B1 EP3953507 B1 EP 3953507B1
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EP
European Patent Office
Prior art keywords
drafting
combing
machine according
combing machine
downstream
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.)
Active
Application number
EP20718777.4A
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German (de)
English (en)
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EP3953507A1 (fr
Inventor
Luca SOLIANI
Girolamo Prandini
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.)
Marzoli Machines Textile SRL
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Marzoli Machines Textile SRL
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Publication of EP3953507A1 publication Critical patent/EP3953507A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/14—Drawing-off and delivery apparatus

Definitions

  • the subject matter of the present invention relates to a combing machine for a cotton-fiber spinning preparation line.
  • a carding operation is performed by carding machines, after which the fiber takes the form of a sliver.
  • the carded sliver exiting the carding machine typically undergoes a first draft in a drafting machine, where several slivers are joined together.
  • a predefined number of slivers usually numbering 24, 28 or 32, enter a lap-forming machine to create the laps that are processed in a combining machine, in order to obtain a combed sliver in which the fibers are highly parallelized and clean.
  • the detaching cylinders have an alternating rotary motion.
  • the purpose of the present invention is to create a combing machine, in particular provided with detaching cylinders having a continuous rotary motion (at a constant or variable, but unidirectional speed), that is capable of ensuring a satisfactory level of quality of the combed sliver.
  • a combing machine 1 comprises a fixed frame and a plurality of combing heads 2, aligned along a transverse axis X.
  • each combing head 2 the sliver being machined advances in a longitudinal direction Y.
  • a funnel 4 Downstream of each combing head 2, a funnel 4 is positioned, thanks to which the combed sliver is condensed into a web N.
  • each combing head 2 is deflected by appropriate deviation means 6 and lie alongside one another on a pallet, so as to proceed along a common advancement direction, typically parallel to the transverse direction X.
  • Each combing head 2 comprises a gripper, provided with a lower jaw, an upper jaw and a straight comb, usually on board the lower jaw.
  • the gripper comprises a feeding cylinder, which can be operated to rotate intermittently, supported by the lower jaw.
  • the combing head also comprises, downstream of the gripper, at least one pair of detaching cylinders.
  • a pair 20' of detaching cylinders 20a', 20b' superimposed, preferably in pressure contact, provided with continuous rotary motion (at constant or variable, but not reversible, speed), so as to drag a section of sliver emerging from the jaws, tearing off a tuft of sliver and carrying it downstream.
  • the lower detaching cylinder 20b' is motorized or operated in rotation by means of a kinematic connection with another motorized cylinder, while the upper detaching cylinder 20a', preferably provided with a rubber coating, is in pressure contact with the lower detaching cylinder 20b' and driven in rotation thereby.
  • a pair 20 of auxiliary cylinders comprising an upper auxiliary cylinder 20a, preferably motorized or operating in rotation by means of a kinematic connection with another motorized cylinder, and a lower auxiliary cylinder 20b, usually in pressure contact with the upper auxiliary cylinder 20a and preferably driven in rotation thereby.
  • the auxiliary cylinders 20a, 20b which have a peripheral speed Vs, have a continuous rotary motion (at a constant or variable, but non reversible speed), such as to draw along a section of sliver offered by the detaching cylinders 20a, 20b, tear off a tuft from the sliver and carry it from upstream to downstream.
  • the combing head comprises an auxiliary device 300, comprising said auxiliary cylinders 20a, 20b and respective auxiliary belts 304a, 304b that run along respective closed paths, defined for example by auxiliary deflectors 306a, 306b, 308a, 308b, such as cylinders, rollers, angular elements and suchlike.
  • the combing head comprises a main device 26, placed immediately downstream of the auxiliary cylinders 20a, 20b or immediately downstream of the detaching cylinders 20a', 20b', provided with a main, for example rotating, movable surface 28 against which, and in particular against an impact area 29 of said main surface 28, impacts a tuft emerging from the auxiliary cylinders 20a, 20b.
  • the auxiliary device 300 is suitable for transferring the tuft S' torn off by the detaching cylinders 20a', 20b' to said main device 26.
  • the main surface 28 is provided with a main speed Va, particularly in the impact area 29.
  • said main device 26 comprises a main cylinder 30, provided with continuous rotary motion (at constant or variable, but unidirectional, speed), in a clockwise or anti-clockwise direction, having a side surface 30', which constitutes said main surface 28 of the main device 26.
  • the side surface 30' i.e. the main surface 28, is impermeable to air.
  • no suction holes or gaps are provided on said surface or, if they are, as in the case of a breathable fabric, they are not connected to air suction means.
  • the main cylinder 30 usually has a larger diameter than the diameter of the main detaching cylinders 20a, 20b and a peripheral speed Vm, which corresponds to an angular speed Wm.
  • the peripheral speed Vm of the main cylinder 30 is less than the peripheral speed Vs of the auxiliary cylinders 20a, 20b.
  • the combing head also comprises a transfer device 40 on which is carried a tuft of sliver web that abandons the main surface 28 of the main device 26, or the side surface 30' of said main cylinder 30; said tuft is carried into a transfer area 42 of said transfer device 40.
  • the transfer device 40 is engaged with the main surface 28 of the main device 26; for example, said transfer device 40 is tangent to the side surface 30' of said main cylinder 30 along an engagement line L.
  • said transfer device 40 is flat around said engagement line L.
  • said transfer area 42 of the transfer device 40 is flat.
  • said lower plane of the centers P4 intersects the side surfaces of the lower auxiliary cylinder 20b and of the main cylinder 30, defining a lower passage 32 passed through by the tuft that detaches from the main surface 28, i.e. from the side surface 30', to be carried onto the transfer device 40.
  • An imaginary upper plane of the centers P5 is likewise defined, passing through the axis of rotation of the upper auxiliary cylinder 20a and of the main cylinder 30; said upper plane of the centers P5 intersects the side surfaces of the upper auxiliary cylinder 20a and of the main cylinder 30, defining an upper passage 34.
  • the lower passage 32 through which passes the tuft that detaches from the main surface 28, i.e. from the side surface 30', in order to be carried onto the transfer device 40, is narrower than the upper passage 34.
  • the tuft that detaches from the main surface 28, i.e. from the side surface 30', to be carried onto the transfer device 40 passes through the narrower passage (called the outlet passage) of the two passages created by the lower auxiliary cylinder 20b and the upper auxiliary cylinder 20a in relation to the main surface 28 of the main device 26, i.e. the side surface 30' .
  • the transfer area 42 is positioned facing the lower passage 32, for example upstream of the engagement line L, with reference to the direction of the main speed Va or peripheral speed Vm of the main cylinder 30 on said engagement line L.
  • said transfer device 40 is movable, i.e. provided with a predefined support speed Vs in the transfer area 42.
  • the combing head is provided with a movable mat 50 that travels along a closed path, preferably outside the main cylinder 30, and which, for at least one section, constitutes said transfer device 40.
  • the speed of the mat 50 in the transfer area 42 corresponds to said support speed Vs and matches the direction of the main speed Va or the peripheral speed of the main cylinder 30 on the engagement line L.
  • the mat 50 is tangent to the main surface 28 or side surface 30' of the main cylinder 30.
  • the mat 50 in order to follow its closed path, winds round at least one deflector cylinder.
  • the combing head according to the present invention also comprises a drafting device 600, positioned downstream of the gripper, but upstream of the deviation means 6 of each combing head 2, and in particular upstream of the funnel 4 thereof.
  • the drafting device 600 is located downstream of the main device 26, or downstream of the main cylinder 30, and is fed by the transfer device 40.
  • the drafting device 600 comprises a first pair 602 of drafting cylinders 602a, 602b, of which the first lower drafting cylinder 602b is preferably motorized, while the first upper drafting cylinder 602a is engaged under pressure with the first lower drafting cylinder 602b and driven in rotation thereby.
  • the drafting device 600 also comprises an upper drafting belt 604a, engaged with the first upper drafting cylinder 602a and with a deflector element, for example a roller 606.
  • the drafting device 600 also comprises a lower drafting belt 604b, engaged with the first lower drafting cylinder 602b and with an additional deflector element, for example a baffle 608.
  • the lower drafting belt 604b coincides with the mat 50 of the transfer device 40.
  • the baffle 608 has a T-shaped cross section and a sliding portion 610 having a preferably arched sliding surface 612, on which the lower drafting belt 604b slides.
  • the roller 606 is arranged at said sliding surface 612.
  • the lower drafting belt 604b and the upper drafting belt 604a are in contact with one another for a contact section 614 of their respective paths.
  • the upper drafting belt 604a separates from the lower drafting belt 604b, before the lower drafting belt 604b is deflected by the baffle 610.
  • the lower drafting belt 604 proceeds further forward, supported by the sliding surface 612, before turning into the return section of the closed path.
  • the combed sliver that leaves the first pair 602 of drafting cylinders 602a, 602b advances at a predefined upstream speed V1.
  • the drafting device 600 also comprises a second pair 620 of drafting cylinders 620a, 620b, arranged downstream of the first pair 602.
  • the second lower drafting cylinder 620b is preferably motorized, while the second upper drafting cylinder 620a is in pressure contact with the second lower drafting cylinder 620b and driven in rotation thereby.
  • the imaginary plane C'' that contains the axes of rotation of the second upper drafting cylinder 620a and the second lower drafting cylinder 620b contains a downstream gripper line P" along which said second upper drafting cylinder 620a and second lower drafting cylinder 620b are in contact.
  • the drafting cylinders 620a, 620b of the second pair 620 have a peripheral speed V2, called downstream speed, greater than the downstream speed V1, so that the combed sliver, engaged contemporaneously between the drafting cylinders 602a, 602b of the first pair 602, in the contact section 614 and between the drafting cylinders 620a, 620b of the second pair 620, undergoes drafting.
  • the load with which the drafting belts 604a, 604b are in contact with one another along the contact section 614 is adjustable.
  • the load that the upper drafting belt 604a exerts on the underlying lower drafting belt 604b is adjustable by using a spring with an adjustable load, operating on the deflector or roller 606 or by using several interchangeable springs, each with a predefined load.
  • the combed sliver downstream of the upstream gripper line P', undergoes controlled drafting in that it is held pressed between the upper belt 604a and the lower belt 604b.
  • Said belts 604a, 604b are therefore pressure means suitable for pressing the sliver of overlaid tufts between the upstream gripper line P' and the downstream gripper line P".
  • said pressure means comprise a lower guide, on which the sliver of overlaid tufts runs and an upper belt that presses the sliver onto the guide.
  • the combing heads of the combing machine are moved by one circular comb shaft for the respective circular combs, one upper detaching shaft and one lower detaching shaft for the detaching cylinders, and similarly for the auxiliary cylinders.
  • the comb comprises electronic adjustment means suitable for adjusting the speed of the main surface 28, or the speed of rotation of the main cylinder 30.
  • the speed control it is possible to adjust the extent of the overlap between the tufts.
  • the above description has been made with reference to a combing head provided with detaching cylinders having unidirectional rotary motion; however, according to a variation which does not fall within the scope of the claims, the drafting device can also be used in the context of a conventional combing machine, provided with detaching cylinders having an alternating rotary motion.
  • the combing head according to the present invention produces a high-quality combed sliver because the latter has undergone controlled drafting downstream of the main cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (14)

  1. Peigneuse (1) pour une ligne de préparation de filature de fibre de coton, comprenant au moins deux têtes de peignage (2), dans laquelle chaque tête de peignage comprend :
    - une pince et un peigne circulaire, approprié pour peigner une bande fibreuse ;
    - au moins une paire (20') de cylindres de détachement (20a', 20b'), en aval de la pince, dotés d'un mouvement rotatif unidirectionnel ;
    - un dispositif d'étirage (600), situé en aval de la pince et des cylindres de détachement (20a', 20b'), appropriés pour étirer la bande peignée ;
    dans laquelle le dispositif d'étirage (600) comprend une première paire (602) de cylindres d'étirage (602a, 602b) maintenus sous pression le long d'une ligne de préhension amont (P') et une deuxième paire (620) de cylindres d'étirage (620a, 620b), en aval de la première paire (602), en contact de pression le long d'une ligne de pression aval (P") ;
    caractérisée en ce que chaque tête de peignage comprend un moyen de déviation (6), agencé en aval de la pince et des cylindres de détachement (20a', 20b'), approprié pour faire dévier un brin (N), dans laquelle la bande peignée est condensée, vers une direction transversale (X) d'avancement commun, le long de laquelle les brins des têtes de peignage sont placés mutuellement côte à côte ; et en ce que le dispositif d'étirage (600) est situé en amont du moyen de déviation (6) et comprend un moyen de pression approprié pour presser la bande de touffes recouvertes entre la ligne de préhension amont (P') et la ligne de préhension aval (P") ; et le moyen de pression comprend :
    - une courroie d'étirage supérieure (604a), en prise avec le premier cylindre d'étirage supérieur (602a) et avec un élément déflecteur, par exemple un rouleau (606) ; et
    - une courroie d'étirage inférieure (604b), en prise avec le premier cylindre d'étirage inférieur (602b) et avec un autre élément déflecteur, par exemple un déflecteur (608) ;
    dans laquelle lesdites courroies (604a, 604b) s'étendent le long de voies fermées respectives et sont en contact l'une avec l'autre le long d'une section de contact (614) en aval de la ligne de préhension amont (P').
  2. Peigneuse selon la revendication 1, dans laquelle le dispositif d'étirage est situé en amont d'un entonnoir (6) pour condenser la bande.
  3. Peigneuse selon la revendication 1, dans laquelle les cylindres d'étirage (620a, 620b) de la deuxième paire (620) ont une vitesse périphérique supérieure à la vitesse périphérique des cylindres d'étirage (602a, 602b) de la première paire (602).
  4. Peigneuse selon la revendication 1, dans laquelle le déflecteur (608) présente une surface coulissante (612) qui coulisse en support d'une partie de la courroie d'étirage inférieure (604b), ladite surface coulissante (612) étant de préférence arquée.
  5. Peigneuse selon la revendication 4, dans laquelle la section de contact (614) recouvre au moins partiellement la surface coulissante (612) du déflecteur (608).
  6. Peigneuse selon la revendication 5, dans laquelle la section de contact (614) recouvre seulement partiellement la surface coulissante (612) du déflecteur (608).
  7. Peigneuse selon l'une quelconque des revendications précédentes, dans laquelle le rouleau (606) est agencé le long de la surface coulissante (612).
  8. Peigneuse selon l'une quelconque des revendications précédentes, dans laquelle le déviateur ou rouleau (606) fonctionne sur la courroie supérieure (604a) avec une charge ajustable.
  9. Peigneuse selon la revendication 8, dans laquelle ladite charge est ajustable par un ressort fonctionnant sur le déviateur ou
    rouleau (606).
  10. Peigneuse selon l'une quelconque des revendications précédentes, dans laquelle chaque tête de peignage comprend :
    - l'au moins une paire (20') de cylindres de détachement (20a', 20b') en contact l'un avec l'autre, appropriés pour déchirer de manière successive des touffes de fibre d'une bande fibreuse et les transférer en aval à une vitesse de transfert ;
    - un dispositif principal (26) doté d'une surface principale (28) mobile à une vitesse prédéfinie inférieure à la vitesse de transfert, ladite surface principale (28) étant configurée de telle sorte que lesdites touffes heurtent de manière successive une zone d'impact (29) de ladite surface principale (28) et sont partiellement recouvertes, formant une bande constituée de touffes partiellement recouvertes ;
    - un dispositif de transfert (40) qui collecte et déplace la bande constituée de touffes partiellement recouvertes ;
    - dans laquelle le dispositif d'étirage (600) est placé en aval du dispositif de transfert (40) et chargé par ce dernier avec ladite bande constituée de touffes partiellement recouvertes.
  11. Peigneuse selon la revendication 10, dans laquelle
    - le dispositif de transfert (40) comprend un mat déplaçable (50) ; et
    - la courroie d'étirage inférieure (604b) coïncide avec le mat (50) du dispositif de transfert (40).
  12. Peigneuse selon la revendication 10 ou 11, comprenant un dispositif auxiliaire (300), agencé entre la paire (20') de cylindres de détachement (20a', 20b') et le dispositif principal (26).
  13. Peigneuse selon l'une quelconque des revendications 10 à 12, dans laquelle le dispositif principal (26) comprend un cylindre principal (30) doté d'un mouvement rotatif continu, à vitesse constante ou variable, dans laquelle une surface latérale (30') du cylindre principal (30) constitue ladite surface principale (28).
  14. Peigneuse selon l'une quelconque des revendications 10 à 13, dans laquelle la surface principale (28) est imperméable à l'air.
EP20718777.4A 2019-04-11 2020-03-26 Peigneuse pour ligne de préparation de filature Active EP3953507B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000005608A IT201900005608A1 (it) 2019-04-11 2019-04-11 Pettinatrice di una linea di preparazione alla filatura
PCT/IB2020/052861 WO2020208454A1 (fr) 2019-04-11 2020-03-26 Peigneuse pour ligne de préparation de filature

Publications (2)

Publication Number Publication Date
EP3953507A1 EP3953507A1 (fr) 2022-02-16
EP3953507B1 true EP3953507B1 (fr) 2023-03-29

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EP20718777.4A Active EP3953507B1 (fr) 2019-04-11 2020-03-26 Peigneuse pour ligne de préparation de filature

Country Status (5)

Country Link
EP (1) EP3953507B1 (fr)
JP (1) JP7423650B2 (fr)
CN (1) CN113966417B (fr)
IT (1) IT201900005608A1 (fr)
WO (1) WO2020208454A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200008438A1 (it) 2022-04-28 2023-10-28 Marzoli Machines Textile Srl Pettinatrice dotata di mezzi di orientamento delle fibre dei bordi del velo di fibre e relativo metodo

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Also Published As

Publication number Publication date
EP3953507A1 (fr) 2022-02-16
CN113966417B (zh) 2023-08-25
CN113966417A (zh) 2022-01-21
JP7423650B2 (ja) 2024-01-29
IT201900005608A1 (it) 2020-10-11
WO2020208454A1 (fr) 2020-10-15
JP2022527046A (ja) 2022-05-30

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