EP3950551A1 - Dispositif et méthode de contrôle d'un ballon, unité d'enroulement comportant un tel dispositif - Google Patents

Dispositif et méthode de contrôle d'un ballon, unité d'enroulement comportant un tel dispositif Download PDF

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Publication number
EP3950551A1
EP3950551A1 EP21187905.1A EP21187905A EP3950551A1 EP 3950551 A1 EP3950551 A1 EP 3950551A1 EP 21187905 A EP21187905 A EP 21187905A EP 3950551 A1 EP3950551 A1 EP 3950551A1
Authority
EP
European Patent Office
Prior art keywords
containment
yarn
balloon
arm
containment element
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.)
Pending
Application number
EP21187905.1A
Other languages
German (de)
English (en)
Inventor
Mauro Moro
Stefano Malfante
Gianluca FLAIS
Manpreet Singh
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
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 Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP3950551A1 publication Critical patent/EP3950551A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/22—Guides for filamentary materials; Supports therefor adapted to prevent excessive ballooning of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/44—Arrangements for rotating packages in which the package, core, or former is engaged with, or secured to, a driven member rotatable about the axis of the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
    • B65H67/0405—Arrangements for removing completed take-up packages or for loading an empty core
    • B65H67/0411—Arrangements for removing completed take-up packages or for loading an empty core for removing completed take-up packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/243—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages actuated by use of a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a device for controlling a balloon during the unwinding of a bobbin, a winding unit provided with such a device, and a method for controlling a balloon during the unwinding of a bobbin.
  • industrial-type winding machines comprise a plurality of winding units that are independent of each other and controlled by a programmable control unit.
  • the winding unit is used for winding a yarn on a support, generally cone-shaped, to create a spindle that will be used in weaving, knitting, or other subsequent processing.
  • the yarn is wound on the support with a predetermined type of winding to optimize the subsequent unwinding of the yarn from the spindle during the weaving stage.
  • thread or “monofilament” or “continuous thread” means a single filament or continuous strand (for example in the case of silk, artificial, or synthetic fibers), while the term “yarn” means the set of fibrils of variable length that are parallelized and joined by twisting. In the following, either term will be used indistinctly, it being understood that the applications of the present invention are not limited to one or the other type.
  • the yarn is wound on the spindle preferably with a cylinder in contact with said spindle and rotating about an axis substantially parallel to that of the spindle.
  • the cylinder is provided with a predetermined geometry of seats that are engaged by the yarn and guide it during its winding onto the spindle.
  • the yarn in the vicinity of the bobbin forms a so-called balloon: as it unwinds from the bobbin, it becomes wider with respect to the shape of the yarn wound on the bobbin, and this widening extends for a certain height above the bobbin, up to the cylindrical connection point placed above the tube.
  • the more the unwinding speed increases the more the diameter of the balloon increases until it collapses and slides onto the tube, thus losing its characteristic shape.
  • the centrifugal force is not sufficient to overcome the other forces involved (Coriolis force in primis but also aerodynamic resistance force), and the balloon closes up on the tube.
  • the correlation between the balloon diameter and the tension due to unwinding is well known; in particular, it is known that as the unwinding speed of the bobbin increases, the balloon diameter increases and consequently so does the unwinding tension. Moreover, in the event that the balloon collapses, the tension is further raised by the friction generated between the thread and tube. Such friction, inter alia, may deteriorate the yarn.
  • the prior art has tried to solve this problem by attempting to confine the diameter of the balloon, passing the yarn inside a containment element that is part of a system called a balloon breaker, substantially cylindrical in shape, coaxial with respect to the bobbin, and positioned near the upper end of the bobbin.
  • the known types of balloon breakers provide additional functions, such as a downward shift of the containment element as the amount of yarn remaining on the bobbin decreases.
  • This solution is particularly favored because it allows an optimal distance to be maintained between the yarn still wrapped on the bobbin and the containment element, thus allowing an optimal confinement of the balloon inside the containment element.
  • each winding machine may comprise dozens of winding units and thus dozens of such devices.
  • the movement is carried out through a motor connected to a screw element parallel to the direction of movement of the containment element, using for the movement a so-called screw-nut coupling.
  • the device also comprises sensors, for example optical sensors, which are adapted to detect the height of the portion of the bobbin covered by yarn and transmit this information to a programmable control unit, which consequently commands the motor to lower the containment element.
  • sensors for example optical sensors, which are adapted to detect the height of the portion of the bobbin covered by yarn and transmit this information to a programmable control unit, which consequently commands the motor to lower the containment element.
  • the system is very complex because it requires continuous monitoring of the winding state of the yarn on the bobbin in order to continuously move the containment element.
  • the reduction in tension that is achieved may, with some yarns, worsen the hairiness of the yarn due to the friction that is generated.
  • a device for controlling a balloon according to claim 1 a winding unit comprising said device according to claim 16, and a method for controlling the balloon according to claim 17.
  • Fig. 1 the general numerical reference 12 is used to indicate a device for controlling a balloon during the unwinding of a yarn 14 from a bobbin 16 in a winding unit 18.
  • the device 12 comprises:
  • the first containment element 20 comprises a first containment component 120 and a second containment component 220.
  • the support 24 comprises a first arm 124 and a second arm 224 on which the first containment component 120 and the second containment component 220 are respectively positioned.
  • the device 12 comprises drive means 26 adapted to move the arms 124, 224, and consequently the containment components 120, 220, between two positions: a first position wherein the containment components 120, 220 are spaced apart from each other, and a second position wherein the containment components 120, 220 are closer together with respect to the first position.
  • the containment components 120, 220 may be in contact with each other.
  • the containment components 120, 220 may be spaced apart so as not to interact substantially with the balloon that develops during the unwinding of the yarn 14 from the bobbin 16.
  • the containment components 120, 220 may be closer together, and possibly in contact with each other, so as to interact substantially with the balloon that develops during the unwinding of the yarn 14 from the bobbin 16.
  • one or more intermediate positions may be provided between the first position and the second position of the containment components 120, 220 so as to allow for a containment of the balloon depending on the size of said balloon.
  • the through opening 22 in the second position, may be substantially cylindrical with an outward flaring 28 at the input portion of the yarn 14.
  • the containment components 120, 220 may have a widening, and therefore an increase in the diameter of the through opening 22, at the input portion of the yarn 14.
  • the through opening 22 may have a narrowing 29 at a position opposite the input of the yarn of the through opening 22.
  • the first arm 124 and the second arm 224 may rotate in opposite directions about respective rotation axes y, z spaced apart from each other and substantially parallel to said axis x.
  • the first arm 124 and the second arm 224 may be provided with cogwheels 126, 226, integral with their respective arms, which mesh with each other and are adapted to rotate about their respective axes y, z, so that the rotation of one arm causes the rotation of the other arm and are therefore synchronous.
  • Fig. 9 One such embodiment is shown, for example, in Fig. 9 , wherein the cogwheels 126, 226 are shown, which may also be incomplete and provided only at one portion of the circumference of the cogwheel.
  • the drive means may comprise alternative systems to the cogwheels 126, 226 such as an articulated, quadrilateral kinematic motion or a crank mechanism.
  • the drive means 26 may comprise a linear actuator 260 connected to one of the arms 224 at a lever 128 arranged on the arm 224, whereby a linear movement of one operating end of the linear actuator 260 causes a rotation of the arm 224, and consequently of the other arm 124.
  • the linear actuator may, for example, be a pneumatic actuator, or an electric actuator, in a way known per se to the person skilled in the art.
  • the arms 124, 224 may be driven in different technical ways, such as through the use of rotary actuators or the like.
  • the actuators used may, for example, be pneumatic or electric.
  • the arms may also be without the coupling with cogwheels.
  • the drive means 26 may be adapted to move the containment components 120, 220 in a straight direction.
  • a linear actuator shared by both the containment components 120, 220 or a linear actuator for each linear element may be provided.
  • the drive means may be suitable for achieving asynchronous movement of the containment components 120, 220.
  • the linear actuator may, for example, be directly keyed to one of the containment components and, by means of a mechanical transmission, may also move the other containment component.
  • the device 12 comprises a second static containment element 50 arranged downstream from the first containment element 20, comprising a second through opening 52 arranged with a base portion 54 in use facing toward the first containment element 20, having a substantially rectangular cross section with respect to the longitudinal axis x.
  • the second containment element 50 may be arranged on the same support 24 as the first containment element 20.
  • the base portion 54 of the second through opening 52 may have a substantially square cross section. More specifically, it may have a substantially square cross section with a side dimension of between 20 mm and 30 mm, preferably between 24 mm and 28 mm, and even more preferably around 26 mm. Further, the height of the base portion 54 of the second through opening 52, according to a longitudinal direction perpendicular to the cross section of the second through opening 52, may be between 30 mm and 45 mm, and preferably between 35 mm and 40 mm.
  • the substantially rectangular or square cross section may comprise inward protrusions located at the midpoint of each side making up the rectangular or square cross section.
  • the second through opening 52 may comprise a central portion 56 having a substantially truncated pyramid shape with a larger base at the base portion 54 opposite the input section of the yarn in the second containment element 50.
  • the truncated pyramid-shaped central portion 56 comprises a smaller base having a substantially circular shape opposite the larger base.
  • the second through opening 52 may further comprise a substantially cylindrical end portion 58.
  • the yarn 14, during an unwinding stage of a bobbin may pass within the first containment element 20 and subsequently, within the second containment element, in particular within the base portion 54, the central portion 56, and the end portion 58.
  • the sides of the cross section of the second containment element 50 may, for example, be joined together so that there are no internal edges.
  • the continuity of the balloon is interrupted during its formation ( Fig. 4A ). More specifically, the continuous rubbing and bumping of the yarn on the sides of the containment element delays the formation of the balloon and thus the increase in the longitudinal tension component of the yarn.
  • the balloon tends to form, in a lower position than before.
  • the second containment element 50 loses effectiveness as the balloon height, and consequently the yarn tension, increases.
  • the height causes the thread to slide on the tip of the tube, thus losing contact with the inner surfaces of the second containment element 50 ( Fig. 4B ).
  • the method for controlling a balloon through a device 12 essentially comprises:
  • the operating parameter used may be a percentage of the yarn unwound from the bobbin.
  • the operating parameter may, for example, be the yarn tension, measured downstream of the device 12.
  • actuation of the containment element 20 from the first position to the second position, or to an intermediate position, if present, may occur when a specified value of the yarn tension measured downstream of the device is exceeded.
  • the actuation of the containment element from the first position to the second position, or to an intermediate position, if present, may be performed when a specified tension value is exceeded a predetermined number of times, or for a predetermined length of time.
  • the thread tension adjustment system that is already installed on the winders.
  • the thread tensioning system normally works between a minimum and a maximum value which correspond respectively to a maximum and a minimum winding tension, and it is possible to make use of said system to adjust the winding speed, as well as the actuation of the first containment element.
  • the thread tension adjustment system may be used so that the first containment element is actuated when the thread tensioner operates near the minimum value (corresponding to a high winding tension), or when a specified value is exceeded a predetermined number of times, or for a predetermined length of time.
  • the distance between the device 12 and the bobbin As for the adjustment of the distance between the device 12 and the bobbin, this depends on the unwinding parameters as will be obvious to the person skilled in art. More specifically, the distance between the device and the tube of the bobbin may be adjusted according to, for example, the behavior of the balloon at certain unwinding speeds, and the yarn count.
  • the distance between the second containment element and the tube of the bobbin may be about 10-30 mm, whereas the distance between the first containment element and the second containment element may be about 4-12 mm.
  • the distance between the end of the tube of the bobbin and the narrowing 29 of the first containment element may be between 4 and 12 mm.
  • the through opening 22 may have a diameter of about 26-42 mm.
  • the narrowing 29 may be approximately 22-40 mm in diameter.
  • control of the balloon occurs indirectly, through the measurement of the tension of the yarn during the step of unwinding from the bobbin.
  • the first containment element 120 and the second containment element 220 close just above where the yarn detaches from the winding of the coils. Doing so generates a controlled tension sufficient to avoid rubbing against the tube, but not so high as to unwind several coils at once or, worse, so as to break the yarn.
  • the main advantages that may be achieved are a stabilization and reduction of the unwinding tension, the fluctuations of which may stress the yarn during said unwinding. In this way it is possible to increase the unwinding speed in the final step, even by 30-40%.

Landscapes

  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Toys (AREA)
EP21187905.1A 2020-08-07 2021-07-27 Dispositif et méthode de contrôle d'un ballon, unité d'enroulement comportant un tel dispositif Pending EP3950551A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000019660A IT202000019660A1 (it) 2020-08-07 2020-08-07 Dispositivo e metodo per il controllo di un balloon, unità di roccatura comprendente tale dispositivo

Publications (1)

Publication Number Publication Date
EP3950551A1 true EP3950551A1 (fr) 2022-02-09

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ID=72886067

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Application Number Title Priority Date Filing Date
EP21187905.1A Pending EP3950551A1 (fr) 2020-08-07 2021-07-27 Dispositif et méthode de contrôle d'un ballon, unité d'enroulement comportant un tel dispositif

Country Status (3)

Country Link
EP (1) EP3950551A1 (fr)
CN (2) CN216471447U (fr)
IT (1) IT202000019660A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4122858A1 (fr) * 2021-07-21 2023-01-25 Maschinenfabrik Rieter AG Procédé permettant de faire fonctionner un poste de travail d'une machine à bobiner, ainsi que machine à bobiner
EP4122857A1 (fr) * 2021-07-21 2023-01-25 Maschinenfabrik Rieter AG Poste de travail d'une machine à bobiner, ainsi que procédé de rebobinage d'un fil
DE102022107378A1 (de) 2022-03-29 2023-10-05 Rieter Automatic Winder GmbH Arbeitsstelle einer einen Faden von Spinnkopsen auf Kreuzspulen umspulenden Spulmaschine
IT202200015126A1 (it) 2022-07-19 2024-01-19 Savio Macch Tessili Spa Metodo di controllo della tensione di roccatura
IT202200015183A1 (it) 2022-07-20 2024-01-20 Savio Macch Tessili Spa Unità di roccatura munita di un dispositivo tendifilo di un filato, e relativo metodo di controllo

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115369527B (zh) * 2022-10-21 2023-03-24 武汉纺织大学 一种对气圈进行拍摄检测以降低直捻机能耗的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673138A (en) * 1985-03-01 1987-06-16 Murata Kikai Kabushiki Kaisha Apparatus for preventing scatter of fly in winder
US4917326A (en) * 1987-04-15 1990-04-17 Murata Kikai Kabushiki Kaisha Fluff scattering preventing device in winder
US5377923A (en) * 1991-07-01 1995-01-03 Murata Kikai Kabushiki Kaisha Yarn unwinding assisting device and yarn unwinding method in an automatic winder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673138A (en) * 1985-03-01 1987-06-16 Murata Kikai Kabushiki Kaisha Apparatus for preventing scatter of fly in winder
US4917326A (en) * 1987-04-15 1990-04-17 Murata Kikai Kabushiki Kaisha Fluff scattering preventing device in winder
US5377923A (en) * 1991-07-01 1995-01-03 Murata Kikai Kabushiki Kaisha Yarn unwinding assisting device and yarn unwinding method in an automatic winder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4122858A1 (fr) * 2021-07-21 2023-01-25 Maschinenfabrik Rieter AG Procédé permettant de faire fonctionner un poste de travail d'une machine à bobiner, ainsi que machine à bobiner
EP4122857A1 (fr) * 2021-07-21 2023-01-25 Maschinenfabrik Rieter AG Poste de travail d'une machine à bobiner, ainsi que procédé de rebobinage d'un fil
DE102021118843A1 (de) 2021-07-21 2023-01-26 Maschinenfabrik Rieter Ag Verfahren zum Betreiben einer Arbeitsstelle einer Spulmaschine sowie Spulmaschine
DE102022107378A1 (de) 2022-03-29 2023-10-05 Rieter Automatic Winder GmbH Arbeitsstelle einer einen Faden von Spinnkopsen auf Kreuzspulen umspulenden Spulmaschine
IT202200015126A1 (it) 2022-07-19 2024-01-19 Savio Macch Tessili Spa Metodo di controllo della tensione di roccatura
EP4310043A1 (fr) 2022-07-19 2024-01-24 Savio Macchine Tessili S.p.A. Procédé de commande de la tension d'enroulement
IT202200015183A1 (it) 2022-07-20 2024-01-20 Savio Macch Tessili Spa Unità di roccatura munita di un dispositivo tendifilo di un filato, e relativo metodo di controllo
EP4310044A1 (fr) 2022-07-20 2024-01-24 Savio Macchine Tessili S.p.A. Unité d'enroulement pourvue d'un dispositif de tension de fil d'un fil et procédé de commande associé

Also Published As

Publication number Publication date
CN114057020A (zh) 2022-02-18
CN216471447U (zh) 2022-05-10
IT202000019660A1 (it) 2022-02-07

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