EP3572565A1 - Dispositif de dessin pour une bande avec machine de cardage pour systèmes de filage à air, appareil de filage à air et procédé de dessin pour une bande avec machine de cardage pour systèmes de filage à air associés - Google Patents

Dispositif de dessin pour une bande avec machine de cardage pour systèmes de filage à air, appareil de filage à air et procédé de dessin pour une bande avec machine de cardage pour systèmes de filage à air associés Download PDF

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Publication number
EP3572565A1
EP3572565A1 EP19170327.1A EP19170327A EP3572565A1 EP 3572565 A1 EP3572565 A1 EP 3572565A1 EP 19170327 A EP19170327 A EP 19170327A EP 3572565 A1 EP3572565 A1 EP 3572565A1
Authority
EP
European Patent Office
Prior art keywords
carding machine
web
drawing device
extraction
rotation
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.)
Granted
Application number
EP19170327.1A
Other languages
German (de)
English (en)
Other versions
EP3572565B1 (fr
Inventor
Fabio D'agnolo
Vittorio COLAVITTI
Solitario Nesti
Luciano MONCINI
Patrizio Vannini
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.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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Publication date
Application filed by Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP3572565A1 publication Critical patent/EP3572565A1/fr
Application granted granted Critical
Publication of EP3572565B1 publication Critical patent/EP3572565B1/fr
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Classifications

    • 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
    • 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
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
    • D01H4/32—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls using opening rollers

Definitions

  • the present invention relates to a drawing device for a web with carding machine for air spinning systems, an air spinning apparatus comprising said drawing device of a web with carding machine and a drawing method for a web with carding machine for air spinning systems thereof.
  • the drawing systems used are normally formed by three or more pairs of drawing and pressure cylinders, each of which performs a partial and progressive drawing of the web.
  • the last pair uses belt systems which ensures greater delicacy in fibre parallelization and drawing.
  • the output fibre flow continuity is a fundamental requirement.
  • the drawing systems used in air spinning devices are derived in toto from those traditionally used in ring spinning and suffer from the same shortcomings, i.e. poor parallelization efficiency at high working speed and limited maximum obtainable drawing.
  • Carding machine drawing systems instead, are used in open-end spinning systems to convey the fibres from the inlet to the rotor using the mechanical action of the teeth to tear the fibres from the web and the centrifugal action due to the high rotation speed to remove impurities and short fibres from the flow of fibres which enters into the rotor.
  • the continuous flow of fibres is not a fundamental requirement and nor is the presence of short or broken fibres.
  • the systems with carding machine are more compact than those with rollers and above all the parallelization function of the fibres, ensured by the action of the teeth of the carding machine, is extremely effective and is not affected in any manner by the working speed or the imparted drawing amount.
  • reference numeral 4 indicates a drawing device for webs 8 of textile fibres as a whole.
  • the drawing device 4 comprises a feeder device 12 of a web 8 to be drawn, comprising a feeder roller 16.
  • the feeder roller 16 is driven so as to rotate about a rotation pivot thereof.
  • the feeder device 12 further comprises a nozzle or a mouth 20 which conveys the web 8 to be drawn towards the successive drawing processes.
  • the nozzle or mouth 20 defines a passage channel 24 for the web 8 together with the feeder roller 16.
  • the nozzle or mouth 20 is preferably pressed towards the feeder roller 16 so as to apply a pressure which is as a function of the input web thread count.
  • the feeder roller 16 by virtue of its motorized rotation, sets in motion the web 8, which is fed at an input speed Vi.
  • the drawing device 4 further comprises a carding machine 28 comprising, on its outer side wall 32, a plurality of teeth 36 arranged at a constant tangential pitch P.
  • the teeth 36 are shaped so as to draw the web 8.
  • the feeder roller 16 rotates and directly faces the carding machine 28 so as to feed the web to the carding machine 28 at said input speed Vi.
  • the tangential pitch P between the teeth 36 of the carding machine 28 is comprised between 5 and 15 mm.
  • this pitch P is particularly wide compared with the pitches of the solutions of the prior art: this reduces the complexity and cost of the carding machine 28.
  • said teeth 36 have a substantially triangular shape which protrudes from the outer side wall 32 of the carding machine 28, according to a first front portion 40, which directly faces the web 8, and a second rear portion 44 which forms a vertex 48 with the first front portion 40.
  • said vertex 48 has a radial height 52, measured with respect to the outer side wall 32 along a radial direction R passing through a rotation axis C of the carding machine 28, comprised between 0.5 and 2 mm.
  • the first front portion 40 identifies a first angle ⁇ comprised between 5 and 10 degrees with radial direction R, passing through a rotation axis C of the carding machine 28.
  • the second rear portion 44 identifies a second angle ⁇ comprised between 40 and 70 degrees with tangential direction T perpendicular to a radial direction R passing through the rotation axis C of the carding machine 28.
  • the web 8 is fed by the feeder device 12, at the input speed Vi according to a direction of advancement F agreeing with a direction of rotation S of the carding machine 28.
  • the carding machine 28 is driven in rotation so as to have a peripheral speed or extraction speed Ve on the teeth 36 equal to the product of the input speed Vi times the total drawing St of the web 8, so that the drawing of the web 8 takes place entirely on the carding machine 28.
  • the Ve value must remain about 20% of the product of the input speed Vi times the total drawing St.
  • the Ve value must remain about 10% of the product of the input speed Vi times the total drawing St.
  • the Ve value must remain about 5% of the product of the input speed Vi times the total drawing St.
  • Total drawing St means the ratio between the thread count of the yarn to be produced and the input web thread count.
  • the drawing device 4 further comprises an extraction cylinder 56 placed downstream of the carding machine 28 and of the web 8.
  • the carding machine 28 receives the web 8 from the feeder device 12 and, by rotating in the same direction as the direction of advancement F of the web 8, pulls and draws the web 8 towards the extraction cylinder 56, arranged downstream of the carding machine 28 and of the web 8 with respect to said direction of advancement F of the web 8.
  • the carding machine 28 and the extraction cylinder 56 rotate in mutually opposite directions of rotation S,G.
  • the extraction cylinder 56 rotates in a counter-rotating direction G with respect to the direction of rotation S of the carding machine 28.
  • the extraction cylinder 56 has a specific shape.
  • the extraction cylinder 56 defines an inner cavity 60 and has a perforated side wall 64, provided with a plurality of holes 68 communicating with the inner cavity 60, adapted to create a suction flow in order to facilitate the detachment of the fibres from the carding machine 28.
  • the inner cavity 60 is connected to a vacuum source so as to create a suction flow through said holes 68 which facilitates the removal of the fibres from the carding machine 28.
  • said holes 68 are circular holes having a diameter comprised between 1 and 3 mm.
  • said holes 68 are arranged according to a matrix diagram along a pair of directions perpendicular to each other, and are spaced apart according to a first and a second pitch L1, L2.
  • said first and second pitches L1, L2 are comprised between 2 and 4 mm.
  • said first and second pitches L1, L2 are equal to each other.
  • one of said directions of the matrix diagram is parallel to a rotation axis W of the extraction cylinder 56.
  • the perforated side wall 64 of the extraction cylinder 56 has holes 68 arranged along an extraction band 72 having an axial thickness H, parallel to the rotation axis W of the extraction cylinder 56, comprised between 4 and 11 mm.
  • the vertices 48 of the teeth 36 and the side wall 64 of the extraction cylinder 56 are distant by a pitch 76 comprised between 0.1 and 2 mm.
  • a conveying device 80 is arranged downstream of the extraction cylinder 56 equipped with an output roller 84 which turns in idle manner and facilitates the extraction of the yarn from the extraction cylinder 56.
  • a spinning apparatus for the successive operations to be performed on the yarn may be advantageously arranged downstream of the drawing device 4.
  • the feeder device sends the web 8 at an advancement speed Vin through the nozzle or mouth 20.
  • the advancement speed Vin of the web 8 also corresponds to the tangential rotation speed of the feeder roller 16 at its point of contact with the web itself.
  • the carding machine 28 is driven in rotation, according to a direction of rotation S, in a direction agreeing with the direction of advancement F of the web 8.
  • the difference in speed between the tangential or extraction speed Ve of the teeth 36 of the carding machine 28 and the advancement speed Vi of the web 8 determines the total drawing St of the web 8.
  • the web 8 is then passed from the carding machine 28 to the extraction cylinder 56 which, as seen, rotates in direction of rotation G opposite to the direction of rotation S of the carding machine 28.
  • the perforated extraction cylinder 56 which delimits the inner cavity 60, has a perforated side wall 64, provided with a plurality of holes 68 communicating with said inner cavity 60 and with a vacuum source.
  • the removal of the fibres of the web 8 from the carding machine 28 is facilitated by virtue of the vacuum and also by the opposite rotation of the extraction cylinder 56 according to a direction of rotation W opposite to the direction of rotation S of the carding machine 28.
  • the rotation speed of the extraction cylinder 56 is such that the tangential speed on the side wall 64 is approximately equal to the tangential speed of the teeth 36 of the carding machine 28.
  • the fibres of the web 8 is then conveyed from the inner cavity 60 output from the extraction cylinder 56, towards the conveying device 80 and the output roller 84.
  • the present invention allows overcoming the drawbacks presented in the prior art.
  • the present invention allows obtaining a high-quality yarn, according to the desired thread count because fibre continuity is always ensured.
  • the drawing is obtained in a single step on the carding machine, the fibres are drawn rapidly but progressively and above all continuously. The result is a homogeneous and uniform yarn free of broken fibres and/or short length.
  • the solution of the present invention envisages that the carding machine rotates according to a direction of rotation agreeing with the direction of rotation of the web of fibres: in this manner, it is possible to significantly increase the working speed and drawing amount compared to the solutions of the prior art, without incurring the risk of damaging the fibres.
  • the fibres of the web are drawn practically entirely on the carding machine, which for this purpose is provided with teeth which are not very dense compared to prior art solutions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP19170327.1A 2018-05-24 2019-04-18 Procédé d'étirage pour un ruban Active EP3572565B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000005659A IT201800005659A1 (it) 2018-05-24 2018-05-24 Dispositivo di stiro di un nastro con cardina per sistemi di filatura ad aria, apparato di filatura ad aria e relativo metodo di stiro di un nastro con cardina per sistemi di filatura ad aria

Publications (2)

Publication Number Publication Date
EP3572565A1 true EP3572565A1 (fr) 2019-11-27
EP3572565B1 EP3572565B1 (fr) 2025-08-27

Family

ID=63244831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19170327.1A Active EP3572565B1 (fr) 2018-05-24 2019-04-18 Procédé d'étirage pour un ruban

Country Status (3)

Country Link
EP (1) EP3572565B1 (fr)
CN (2) CN210438869U (fr)
IT (1) IT201800005659A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800005659A1 (it) * 2018-05-24 2019-11-24 Dispositivo di stiro di un nastro con cardina per sistemi di filatura ad aria, apparato di filatura ad aria e relativo metodo di stiro di un nastro con cardina per sistemi di filatura ad aria
CN119952998B (zh) * 2025-03-03 2025-10-17 常熟理工学院 一种针刺管状纤维基复合材料的制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19608828A1 (de) * 1996-03-07 1997-09-18 Fritz Stahlecker Vorrichtung zum Auflösen von Fasermaterial zu Einzelfasern
US5778653A (en) * 1996-03-07 1998-07-14 Fritz Stahlecker Suction roller for an open-end spinning machine
WO2001079595A1 (fr) * 2000-04-14 2001-10-25 Maschinenfabrik Rieter Ag Procede et dispositif de fabrication d'un fil de type fil de continu a anneaux
DE10063729A1 (de) * 2000-12-13 2002-06-27 Fritz Stahlecker Spinnvorrichtung
US20030041587A1 (en) * 2001-08-30 2003-03-06 W. Schlafhorst Ag & Co. Opening arrangement for an open-end spinning frame
WO2017075675A1 (fr) * 2015-11-06 2017-05-11 Bahova Olga Kirilova Procédé et appareil pour la production de fil de fibres coupées dans un processus unique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH706658A1 (de) * 2012-06-29 2013-12-31 Rieter Ag Maschf Verfahren und Vorrichtung zur Regelung der Faserzufuhr zu einer Karde.
IT201800005659A1 (it) * 2018-05-24 2019-11-24 Dispositivo di stiro di un nastro con cardina per sistemi di filatura ad aria, apparato di filatura ad aria e relativo metodo di stiro di un nastro con cardina per sistemi di filatura ad aria

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19608828A1 (de) * 1996-03-07 1997-09-18 Fritz Stahlecker Vorrichtung zum Auflösen von Fasermaterial zu Einzelfasern
US5778653A (en) * 1996-03-07 1998-07-14 Fritz Stahlecker Suction roller for an open-end spinning machine
WO2001079595A1 (fr) * 2000-04-14 2001-10-25 Maschinenfabrik Rieter Ag Procede et dispositif de fabrication d'un fil de type fil de continu a anneaux
DE10063729A1 (de) * 2000-12-13 2002-06-27 Fritz Stahlecker Spinnvorrichtung
US20030041587A1 (en) * 2001-08-30 2003-03-06 W. Schlafhorst Ag & Co. Opening arrangement for an open-end spinning frame
WO2017075675A1 (fr) * 2015-11-06 2017-05-11 Bahova Olga Kirilova Procédé et appareil pour la production de fil de fibres coupées dans un processus unique

Also Published As

Publication number Publication date
CN210438869U (zh) 2020-05-01
IT201800005659A1 (it) 2019-11-24
EP3572565B1 (fr) 2025-08-27
CN110528125A (zh) 2019-12-03

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