EP3984933A1 - Improved kink prevention device for a winding machine and a related method for removing kinks in the yarn in a winder - Google Patents

Improved kink prevention device for a winding machine and a related method for removing kinks in the yarn in a winder Download PDF

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Publication number
EP3984933A1
EP3984933A1 EP21199510.5A EP21199510A EP3984933A1 EP 3984933 A1 EP3984933 A1 EP 3984933A1 EP 21199510 A EP21199510 A EP 21199510A EP 3984933 A1 EP3984933 A1 EP 3984933A1
Authority
EP
European Patent Office
Prior art keywords
yarn
prevention device
kink prevention
actuation
striker
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
EP21199510.5A
Other languages
German (de)
English (en)
French (fr)
Inventor
Stefano Malfante
Ivan BERTOLO
Mauro Moro
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 EP3984933A1 publication Critical patent/EP3984933A1/en
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
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/083—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement handling the yarn-end of the new supply package
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/08—Twist arresters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • 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
    • B65H54/54—Arrangements for supporting cores or formers at winding stations; Securing cores or formers to driving members
    • B65H54/553—Both-ends supporting arrangements
    • 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
    • B65H54/70—Other constructional features of yarn-winding machines
    • 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
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/702—Arrangements for confining or removing dust
    • 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
    • B65H54/86—Arrangements for taking-up waste material before or after winding or depositing
    • 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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
    • B65H59/06—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on material leaving 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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • 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 an improved kink prevention device for a winding machine and a related method for removing kinks in the yarn in a winding machine.
  • the thread or yarn is in motion and unwinds from the bobbin, generating a balloon at high speed, to be able to then be rewound on a reel, after any possible defects have been eliminated by the yarn clearer.
  • the formation of the balloon has been the subject of studies, from which it follows that the balloon generally has a complex ovoid shape that varies continuously as the unwinding of the yarn progresses.
  • balloon breakers In certain conditions, depending on the speed, the distance of the bobbin from the unwinding point, and the weight of the unwound segment of yarn, the balloon may collapse on the tube, thus generating, through friction between the yarn and the tube, high tensions that lead to deterioration of the yarn and its breakage. To prevent this effect, winding machines are equipped with appropriate devices adapted to interrupt the formation of balloons of this type, which are generally called balloon breakers.
  • the reel is immediately braked; however, given its high initial rotational speed, in the short time between cutting and braking, the portion of the cut yarn toward the reel is wound onto the same reel and thus its end may effectively be located on the reel by movable members or suction nozzles.
  • the interrupted portion on the side of the bobbin is no longer subject to any traction and remains free.
  • the end that is along the yarn path on the members of the winding head is sucked in and held by a fixed, properly positioned suction nozzle, or is held by a yarn tensioner or other member.
  • the section that is detached from the bobbin cone by inertia still unwinds by a small amount, and, due to the lack of tension in the yarn, it may form a kink or loop on the yarn, by winding on itself.
  • the kink prevention systems of the prior art comprise brushes that preferably rest on two areas spaced at about 180° on the circumference of the tip of the tube; or are composed of shaped ferrules (as per the applicant's patents EP0275596B1 and EP0909736B1 ) that are supported on a portion of the outer circumference of the tube.
  • the support is normally near the top of the bobbin cone.
  • the slight tension on the yarn is generated in the following way: the yarn that unwinds from the bobbin cone finds the obstacle of the brushes (ferrule) that forces it to pass between the brushes (ferrule) and the tube, which generates a friction and therefore a small tension sufficient to clear any kinks that may have formed; the kink prevention devices are kept in contact with the tube even during the transport of the bobbin yarn by the bobbin nozzle in order to maintain a slight tension favorable to the introduction into the splicer and during a portion of the startup ramp to clear kinks as mentioned above.
  • the kink prevention device is brought into contact with the tube in the shortest possible time, to stop the unwinding of the yarn by inertia.
  • the kink prevention device must be light, and its actuation system must be fast; by remaining in contact with the tube during the suction of the yarn by the bobbin nozzle and during the transport of the yarn to the splicer, the kink prevention device generates a slight tension that is useful for the correct insertion of the yarn into the splicer; lastly, the kink prevention device generates a slight tension during the winding restart ramp. It is then removed from the tube at a certain, generally adjustable, stage of the winding restart acceleration in order to avoid overstressing according to the count, the weak points, and the speed of the yarn.
  • the slight tension given to the yarn is not stable and smooth. In fact, it fluctuates between a maximum and a minimum because, in the case of a shaped ferrule, the sliding of the yarn between the ferrule and the tube takes place only over a small portion of the tube once during each turn of the unwinding of the yarn; in the case of brushes, the sliding takes place twice in a turn, but in no case is the tension maintained during the entire unwinding turn.
  • This intermittent lack of tension in the yarn is not conducive to the complete elimination of kinks and leads to irregularities in the introduction of the yarn into the splicer.
  • the problem to be solved is, on the one hand, to have a very quick intervention of the kink prevention device in order to limit unwinding by inertia, and on the other, to substantially improve the slight tension on the yarn, making it stable and regular beginning from the yarn clearer cutting until rewinding.
  • the kink prevention device 4 fits into a winding machine 8 wherein the yarn 12 intercepted by the kink prevention device 4 unwinds from a bobbin 16 to be wound back onto a reel 20, in a known manner.
  • the kink prevention device 4 comprises a presser element 24, movable along a transverse direction of actuation T-T from a rearward position to a forward position according to an actuation stroke.
  • the presser element 24 has a rod 28 operatively connected to actuation means 32 and a head 36 associated with the rod 28 and shaped to exert a pressure and friction action on the yarn 12.
  • the actuation means 32 of the presser element 24 may be pneumatic, electric, magnetic, or hydraulic actuation means.
  • Said actuation stroke of the presser element 24 is preferably less than or equal to 15 mm. In this way, the actuation time of the presser element is particularly short.
  • the kink prevention device 4 further comprises a striker 40, separate from and opposed to the presser element 24 along said transverse direction of actuation T-T, on the opposite side of a receiving volume 44 of the associated yarn 12, whereby the yarn 12 is located between the head 36 and the striker 40.
  • the striker 40 is in turn provided with an end stop wall 48 that defines an end stop of the forward position of the presser element 24.
  • the kink prevention device 4 comprises a closed loop element 52 that surrounds and accommodates the yarn 12, limiting its movement in a transverse plane perpendicular to said yarn 12.
  • the closed loop element 52 is preferably encompassed in a balloon breaker device 56 located upstream of the presser element 24 and the striker 40 relative to a direction of advancement S-S of the yarn 12 from a bobbin 16 toward a reel 20.
  • the closed loop element is arranged upstream of the presser element 24 and the striker 40 relative to a direction of advancement S-S of the yarn 12 from the bobbin 16 toward the reel 20.
  • said closed loop element 52 is a ring having a circular cross section.
  • the head 36 of the presser element 24 has a width 60, measured perpendicular to the transverse direction of actuation T-T, greater than or equal to the lateral extension 64 of the closed loop element 52.
  • said lateral extension 64 is equal to the diameter of the circle of said closed loop.
  • the striker in turn, has a stop width 68, measured perpendicular to the transverse direction of actuation T-T, that is greater than or equal to the lateral extension 64 of the closed loop element 52.
  • the head 36 of the presser element 24 is an element that ends with a flat wall 72, perpendicular to the transverse direction of actuation T-T.
  • said end wall 48 of the striker 40 is flat and perpendicular to the transverse direction of actuation T-T of the head 36 of the presser element 24.
  • the striker 40 is provided with elastic cushioning means 76 along said transverse direction of actuation T-T.
  • the head 36 is provided with elastic cushioning means 76 along said transverse direction of actuation T-T.
  • the head 36 is provided with elastic return means 80 that counteract the action of the actuation means 32 to return the presser element 24 to a rearward or resting position.
  • the kink prevention device 4 comprises a closed loop element 52 that surrounds and accommodates the yarn 12, limiting its movement in a transverse plane perpendicular to said yarn 12.
  • the winding machine 8 comprises a balloon breaker device 56 of the yarn 12 having a tubular configuration, and said balloon breaker device 56 ends, on the side of the reel 20 and the kink prevention device 4, with said closed loop element 52.
  • the closed loop element 52 is enclosed in the top of the balloon breaker device 56.
  • the balloon breaker device 56 therefore has, on the side of the reel 20, a circular neck that acts as a closed loop element 52.
  • the solution according to the present invention is to achieve the kink prevention function no longer at the circular tip of the bobbin tube, as in the known solutions, but in another area of the winding head, wherein it is possible to quickly stop and generate friction on the yarn on surfaces that ensure a control of the yarn positioning and generate tension without the drawbacks of the prior art.
  • the present embodiment is in effect located just above the unwinding area, immediately after the balloon breaker device 56, which is the first control member of the yarn 12.
  • the kink prevention device 4 is located at the existing yarn presence sensor on the winding head at the outlet of the tube of the balloon breaking device 56, therefore it does not require any additional space in the path of the yarn 12.
  • the kink prevention function is delegated to the head or damper 36 of the presser element 24 which is actuated by the actuation means 32, preferably by a pneumatic plunger, so as to abut against the striker 40, preferably spring-loaded with a 15-gram spring.
  • the stroke of the striker 40 is given by the distance between the retracted position and the extracted position at which the head 36 abuts against the striker 40.
  • the stroke area of the head 36 is located at the outlet of the tube of the balloon breaker device 56, which acts as a closed loop element 52, wherein the segment of yarn 12 on which friction is to be applied after cutting by the yarn clearer is located.
  • the head or damper 36 moving toward the striker 40 intercepts the yarn 12 and conveys it toward the striker 40 assisted by the circular shape of the closed loop element 52 which guides the yarn 12 to rest on the center of the striker 40, preferably cushioned by the elastic cushioning means 76.
  • the yarn 12 is thus lightly clamped between the head or damper 36 and the striker 40, and is subject to moderate friction, which is independent of the unwinding of the yarn 12 from the cone of the bobbin 16.
  • the yarn 12 is contained within the closed loop element 52 and is therefore always intercepted by the head 36 of the presser element 24 when it moves toward the preferably cushioned striker 40.
  • the kink prevention device 4 affects the yarn 12 as it unwinds and moves from the bobbin 16 toward the reel 20 so as to generate a continuous tension on the yarn 12 with friction applied between the head 36 and the striker 40: said tension on the yarn 12 is not subject to variations due to the unwinding of the yarn 12, as is the case in the solutions of the prior art.
  • the tension generated on the yarn 12 is not subject to change due to the unwinding of the yarn because the kink prevention device 4 is positioned outside the unwinding zone of the yarn 12.
  • the present invention provides the following numerous advantages.
  • the actuation of the kink prevention device is immediate, such device being of lightweight manufacturing and having a very short actuation stroke.
  • the friction exerted on the yarn is continuous and not pulsed so it is favorable for preventing the formation of kinks in the yarn during suction operations of the yarn end in the unwinding for transporting the yarn to the splicer, and for clearing any kinks that may have formed upon cutting by the yarn clearer.
  • the yarn always remains under friction so that the tension generated on the yarn is not subject to variations due to the unwinding of the yarn.
  • the unwinding area is freed from the encumbrance of a device, which, however small it may be, always generates points for collecting dust which, after accumulating over time, may deposit on the yarn and generate defects thereon.
  • the kink prevention device according to the present invention is advantageously located outside the yarn unwinding area: in this way, the tension generated on the yarn is not subject to variations due to the unwinding of the yarn.
  • the area where the kink prevention device is placed is preferably above the balloon breaker, where the yarn is guided by a tube, and therefore no additional space is needed on the unwinding path of the yarn. Therefore, the kink prevention device according to the present invention may also be applied to existing winding machines (retrofit device).
  • the kink prevention device according to the invention may also be used in cooperation with a kink prevention device of a known type working on top of the tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP21199510.5A 2020-10-15 2021-09-28 Improved kink prevention device for a winding machine and a related method for removing kinks in the yarn in a winder Pending EP3984933A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000024283A IT202000024283A1 (it) 2020-10-15 2020-10-15 Dispositivo antiriccio perfezionato per macchina roccatrice e relativo metodo per eliminare i ricci sul filo in una roccatrice

Publications (1)

Publication Number Publication Date
EP3984933A1 true EP3984933A1 (en) 2022-04-20

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ID=74068492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21199510.5A Pending EP3984933A1 (en) 2020-10-15 2021-09-28 Improved kink prevention device for a winding machine and a related method for removing kinks in the yarn in a winder

Country Status (3)

Country Link
EP (1) EP3984933A1 (zh)
CN (2) CN114368644A (zh)
IT (1) IT202000024283A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115418764B (zh) * 2022-10-14 2024-05-14 苏州国远新纤纺织科技有限公司 一种涤纶胚布生产用倍捻机断电纱线捻度保护装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1393926A (en) * 1920-09-30 1921-10-18 Veilleux Louis Thread-tensioning means
US2222921A (en) * 1938-04-08 1940-11-26 American Enka Corp Thread brake
DE3843553A1 (de) * 1988-12-23 1990-07-05 Schlafhorst & Co W Garnlieferaggregat eines spulautomaten
EP0275596B1 (en) 1986-12-23 1991-10-16 SAVIO S.p.A. Device for preventing the formation of yarn loops, and for saving the intaken yarn on the winding units
DE4243773A1 (de) * 1992-12-23 1994-06-30 Schlafhorst & Co W Abspulstelle eines Spulautomaten
EP0909736B1 (en) 1997-10-15 2002-05-02 SAVIO MACCHINE TESSILI S.p.A. Balloon controlling device for the unwinding of yarn from the feeding spool of an automatic spooler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1393926A (en) * 1920-09-30 1921-10-18 Veilleux Louis Thread-tensioning means
US2222921A (en) * 1938-04-08 1940-11-26 American Enka Corp Thread brake
EP0275596B1 (en) 1986-12-23 1991-10-16 SAVIO S.p.A. Device for preventing the formation of yarn loops, and for saving the intaken yarn on the winding units
DE3843553A1 (de) * 1988-12-23 1990-07-05 Schlafhorst & Co W Garnlieferaggregat eines spulautomaten
DE4243773A1 (de) * 1992-12-23 1994-06-30 Schlafhorst & Co W Abspulstelle eines Spulautomaten
EP0909736B1 (en) 1997-10-15 2002-05-02 SAVIO MACCHINE TESSILI S.p.A. Balloon controlling device for the unwinding of yarn from the feeding spool of an automatic spooler

Also Published As

Publication number Publication date
CN114368644A (zh) 2022-04-19
CN216807609U (zh) 2022-06-24
IT202000024283A1 (it) 2022-04-15

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