WO2011064744A1 - Dispositif permettant un guidage efficace de fil lors du transfert de fil dans un enrouleur automatique à tourelle - Google Patents

Dispositif permettant un guidage efficace de fil lors du transfert de fil dans un enrouleur automatique à tourelle Download PDF

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Publication number
WO2011064744A1
WO2011064744A1 PCT/IB2010/055441 IB2010055441W WO2011064744A1 WO 2011064744 A1 WO2011064744 A1 WO 2011064744A1 IB 2010055441 W IB2010055441 W IB 2010055441W WO 2011064744 A1 WO2011064744 A1 WO 2011064744A1
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WO
WIPO (PCT)
Prior art keywords
yarn
transfer
traverse
turret
advancing
Prior art date
Application number
PCT/IB2010/055441
Other languages
English (en)
Inventor
Amit Kumar Lohia
Original Assignee
Amit Kumar Lohia
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 Amit Kumar Lohia filed Critical Amit Kumar Lohia
Publication of WO2011064744A1 publication Critical patent/WO2011064744A1/fr

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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
    • B65H57/006—Traversing guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H65/00—Securing material to cores or formers
    • 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
    • B65H67/044—Continuous winding apparatus for winding on two or more winding heads in succession
    • B65H67/048—Continuous winding apparatus for winding on two or more winding heads in succession having winding heads arranged on rotary capstan head
    • 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 automatic turret type winders and more particularly to yarn traverse guide used for laying a continuously arriving yarn around a rotating bobbin while traversing the yarn, further helps in improving yarn transfer efficiency of continuous advancing yarn during the bobbin changeover operation.
  • the term “yarn” is intended to also include the threads, tapes, profile tapes, fibrillated tapes and slit-film bands of various linear mass density, diameter, width and thickness.
  • the term “bobbin” is intended to include any metallic or non-metallic tubes on which the yarn is wound to form a suitable package.
  • the term 'yarn' is also used to describe yarn with multiple threads or ends that a single winder might receive.
  • Automatic turret type winders are used in production or take-up process of continuously advancing yarn, for example, in yarn extrusion machines or in rewinding process for making plurality of small size yarn packages from a large yarn package.
  • the turret type automatic winders are positioned side by side in the horizontal direction and stack one above the other in vertical direction.
  • the number of winding positions is exemplary both in horizontal row and vertical row.
  • the yarn transfer operation is important in the automatic yarn winding operation. If the yarn is not transferred in the first attempt, the continuously advancing yarn gets wasted until it is rethreaded. Worse still, the continuously advancing yarn, if not controlled properly in case it fails to transfer onto the empty bobbin, may interfere with the other yarn winders on the same machine and cause the entire machinery to stop which results in a huge amount of wastage, machine downtime and economic loss. In the worst situations, some parts of the machinery may get damaged.
  • a continuously advancing yarn is generally wound on an initially empty bobbin to form a suitable yarn package.
  • the pre-determined package size length/diameter/time
  • the continuously advancing yarn is transferred by an automatic transfer device to an empty bobbin installed on another spindle to make a new yarn package without interrupting the winding operation.
  • the empty bobbin is positioned in the path of the advancing yarn by rotating the turret.
  • the continuously advancing yarn is then guided onto a yarn grasping device or a catching device by axially shifting or displacing the bobbin spindle or the traversing unit, such that the yarn is clamped at grasping device and then laid across the empty bobbin. Simultaneously, the yarn connecting the bobbin under winding and the full bobbin is severed.
  • the self picking guide is characterized by the profile that has wings or flanks whose slopes fall away from the central notch thereby forming an inclusive angle of greater than 180°.
  • the guide to be used in auto winders is characterized by the wings or flanks which slope towards the central notch, thereby forming an inclusive angle of less than 180°.
  • a common drawback of these two types is that these are prone to malfunction unless the placement of yarn during the winding process is accurate. In the case where yarn is placed outside their safe 'catchment zones' there's a high probability of yarn getting caught in the winder leading to winder shutdown and associated problems and losses.
  • the main object of the invention is to provide a device with improved yarn transfer efficiency during shifting the advancing yarn from the yarn guide to a grasping device and returning the advancing yarn, after yarn has been grasped in the grasping device, to the traverse guide.
  • Another object of the present invention is to provide a simple mechanism, designed to return yarn back into the traverse guide without any precise control over placement of yarn on traverse guide.
  • Further object of this present invention is to provide a yarn shift and yarn return device that is independent of the yarn grasping device.
  • the present invention comprises a traverse guide of a novel design which ensures that advancing yarn is transferred successfully to the bobbin even when the yarn is not precisely transferred back to the traverse guide.
  • Figures la and lb Currently used traverse guides
  • Figure 2a A typical turret type automatic yarn winder
  • Figure 2b Empty bobbin positioned for winding
  • Figure 3a Preferred profiles of the traverse guide and the transfer link
  • Figure 3b Definition of the inclusive angles
  • Figure 4 definition of zones in which the yarn may undesirably fall
  • Figure 4A Illustration of how yarn, if accidentally fallen in zone 1 , finds its way into the groove
  • Figure 5 Illustration of how yarn, if accidentally fallen in zone 2, finds its way into the groove
  • Figure 6 Illustration of how yarn, if accidentally fallen in zone 3, finds its way into the groove
  • Figure 7 Illustration of how yarn, if accidentally fallen in zone 4, finds its way into the groove List of parts:
  • Figure 2a shows a typical turret type yarn winder in which yarn is wound on bobbins to form suitable packages.
  • Figure 2b shows a bobbin that is fully wound to its predetermined package size and an empty bobbin (2) that is ready for winding.
  • the position of the yarn shown in figure 2b is the correct functioning position whereby the yarn is eventually placed inside the groove (5b) of a traverse guide (5).
  • the device of the present invention essentially comprises a novel traverse guide (5) that helps guide the advancing yarn (3) efficiently and accurately into the groove (5b) provided in the traverse guide (5), where it remains secure.
  • the traverse guide (4) moves laterally along a traverse device (4), typically provided in the form of a traverse device.
  • the traverse guide of the present invention is characterized by the unique profile of its edges.
  • the traverse guide along with the two obstacles provided at the two ends of the cam box work together in a unique way to ensure that the advancing yarn finds its way into the groove (5b) during the yarn transfer process.
  • a first obstacle is provided at the far end of the cam box (that is the end away from the turret plate) and a second obstacle is provided at the turret end of the cam box.
  • the first obstacle is in the form of a transfer link (6) which preferably has a rotational degree of freedom. However it may also be in a simple form of a bar or a rigid strip attached to the cam box.
  • the second obstacle is in the form of a rod or a rigid strip attached to the cam box.
  • the device shifts the advancing yarn (3) from the traverse guide (5) towards the grasping device (7) that is typically provided at the end of the bobbin, or alternatively at the end of spindle (8) on which a bobbin is mounted.
  • the device of the present invention in what is termed as the yarn return phase, returns the yarn to the traverse guide (5) so that the winding of the advancing yarn (3) can begin on the empty bobbin (2).
  • the key feature of the present invention is the yarn traverse guide of an innovative profile. As shown in figure 3, it comprises a pair of flanks (5c) to catch the yarn and a stem (5a).
  • the stem (5a) is preferably positioned in a direction perpendicular to the direction of motion of the guide (5). Alternatively, the stem (5a) may be configured in any angle that facilitates the movement of the traverse guide (5) across the cam box (4).
  • the two flanks (5c) are either formed integrally with the stem (5a) or formed separately and fixedly attached to it.
  • Each of the flanks (5c) has an external edge (5cl) and an internal edge (5c2) on either side of the groove (5b).
  • the internal edge (5c2) is the edge of the guide (5) that is close to the cam box and the external edge (5cl) is the edge that is further from the cam box.
  • the external edge (5cl) has an inner profile (5c4) and an external profile (5c3).
  • the inner profiles (5c4) of the two flanks (5c) form a first inclusive angle (5d) (see Figure 3a) between them which is less than 180°, preferably between 180° and 100°.
  • the external profiles (5c3) of the external edge (5c 1) fall away towards the cam box such that the external profiles form a second inclusive angle (5f) between them which is (see Figure 3b) less than 180°, preferably between 180 0 and 100 °.
  • the external edge (5cl) on either side of the groove (5b) is provided in a single convex in profile (see Figure 3 c).
  • the flanks may be placed symmetrically or asymmetrically with respect to the stem.
  • the flanks (5c) may have different profiles with respect to each other (see Figure 3e).
  • multiple grooves are provided; the advancing yarn may be placed in any one of these for efficient and smooth operation of the winder.
  • the position of the groove may not be symmetrical in any way with respect to the traverse guide.
  • the internal edge on either side of the groove (5b) has a concave profile. Alternatively it is a straight edge so that internal edges on either side of the groove (5b) form a third inclusive angle (5g) between them which is less than 180 °, preferably between 180 0 and 100 °.
  • the ideal delivery zone (5e) for the traverse guide is the extent between the peaks of the external edges (5cl and 5c2). This zone is the ideal zone for receiving the advancing yarn. When the yarn falls within this zone, the yarn winding process is carried out at its best and the wound package is the most uniform.
  • One of the key advantages of the present invention is that even if the yarn falls outwit the ideal delivery zone (5e), the yarn winding process continues with acceptable performance and the package is formed with acceptable level of uniformity of winding.
  • a cam box (4) or a similar traversing arrangement houses the traverse guide (5) of the present invention.
  • the traverse guide (5) has at least one groove (5b) to guide advancing yarn (3).
  • the groove (5b) is preferably of a smooth profile without sharp edges.
  • the groove (5b) is optionally fitted with a ceramic element (5bl) through which the advancing yarn (3) passes.
  • Figure 3a shows the unique profile of the traverse guide of the present invention which ensures that the yarn finds its way into the groove (5b) regardless of where the yarn is placed during the yarn return phase.
  • Figure 2b shows the traverse guide together with a transfer link (see figure 3a for details).
  • the transfer link (6) element is provided, typically attached to any appropriate part on winder, preferably near the far end of cam box (4), that is the end of the cam box that is away from the turret plate, or on the traverse box housing.
  • the transfer link (6) assists the traverse guide (5) to direct the advancing yarn (3) towards the grasping device (7) that is provided on the bobbin or on the spindle (8).
  • the transfer link (6) is mounted so that it can freely rotate about the axis of mounting (6f) like a hinge (see figure 2).
  • the transfer link (6) is provided with a hook-shaped profile (see figure 3) such that the transfer link (6):
  • Phase A above refers to the yarn shift phase and phase B the yarn return phase.
  • the novel design of the present invention has ensured that the yarn can be left off virtually anywhere along the cam box and it will still find its way into the groove (5b) when required.
  • Yarn shift phase When a bobbin that is being wound on the winder attains its predetermined package size, the turret rotates such that the full bobbin (1) moves away from the cam box (4) and the empty bobbin (2) is positioned in the path of advancing yarn (3).
  • the traverse guide (5) moves to its extreme position near the bobbin-end fitted with the grasping device (7) and comes to a standstill state at a position detected by a suitable sensor, the preferable position being the end of the traverse stroke.
  • the transfer link (6) rotates about mounting axis (6f) in suitable direction to collect the advancing yarn (3) in the hook (6a).
  • the transfer link (6) continues its rotation away from the traverse guide (5), to carry the advancing yarn (3) away from the winding zone towards the grasping device (7).
  • the grasping device (7) grasps the introduced advancing yarn (3).
  • the profile of the hook (6a) (see figure 3) is of particular relevance in this respect.
  • the hook (6a) has two prominent parts - a transfer part (6b) that ensures secure transfer of the yarn to the grasping device (7), a return part (6d) that ensures return of the advancing yarn(3) to the traverse guide (5).
  • the preferred profile of transfer part (6b) includes a convex shaped (see figure 3) restricting edge (6c) such that preferably a notch (6e) is formed at the yarn picking end of the hook (6a).
  • the novel profile of the restricting edge (6c) ensures that the yarn (3) is securely restricted to the notch (6e) during the yarn' s movement from the traverse guide (5) to the grasping device (7) so that the yarn does not jerk about during this movement.
  • any other shape that would achieve the jerk-free movement of the yarn may be provided to the transfer part (6b).
  • the speed of the angular movement of the transfer link (6) is maintained under control by any suitable mechanism, typically like electro- pneumatic mechanism such that angular movement of transfer link (6) is not too slow to form uneven winding in yarn package or too fast to break the yarn or cause jerk.
  • the transfer link (6) With the advancing yarn (3) still within its hook (6a), rotates towards the traverse guide (5) and with the yarn (3) controlled by the return part (6d) shifts the yarn onto the delivery zone (5e) of the traverse guide (5).
  • the yarn (3) finds it way back into the groove (5b) of the traverse guide (5) or the optional ceramic element (5bl) that is provided within the groove (5b).
  • the conventional traverse guides are typically small in size so that when the transfer link (6) or a similar device returns the advancing yarn (3), after being grasped, to the traverse guides, the positional synchronization between the various parts of the machinery becomes quite critical.
  • the novel shape of the traverse guide (5) of the present invention is such that even if the yarn is not accurately placed in the ideal delivery zone (5e) of the traverse guide, the yarn does not slip off the traverse guide and is always directed back into the central groove, either during the forward or backward movement of the traverse guide.
  • the new system of the present invention with its novel profile of the traverse guide ensures that there's no need for a control zone. This results in a system that is simple to implement and reduces the operator induced errors.
  • the present invention makes it possible to complete the transfer by eliminating the risk of the winder shutdown. This is achieved with the help of the traverse guide in combination with the first obstacle and the second obstacle.
  • the two obstacles restrict the lateral movement of the advancing yarn (that is the movement along the cam box) so that the yarn remains within the operating area.
  • the second obstacle is typically in the form of a bar, hitherto referred to as a turret bar, which may be straight or bent downward at its end. It is preferably attached to the cam box at its turret end, either fixedly or in any manner that allows its function.
  • Figure 4 shows four zones, namely zone 1 , zone 2, zone 3, and zone 4, in which if the yarn falls, it could lead to accidental interruption of the winding processes when used with conventional traverse guides.
  • Figures 4A to 7 illustrate the inventive mechanism due to which the yarn finds its way back into the central groove even if it falls into any of the undesirable ones, zones 1-4.
  • the yarn is shown to find itself behind the left wing of the traverse guide while the guide is moving towards the turret end (part a of the figure).
  • the yarn would have no mechanism to find its way into the groove.
  • the guide as the guide continues its movement towards the turret end, it pushes the yarn along with it till its motion reverses from the turret end (part b of the figure).
  • the yarn which is under tension, slips out from behind the left wing and finds itself somewhere along the cam box (Fig 4A - part c).
  • the traverse guide reaches the transfer link end of its course and reverses its motion once again (Fig 4A - part d).
  • the yarn is now situated in a right position with respect to the yarn guide and easily finds itself in the groove (Fig 4A - part e).
  • the turret bar keeps the yarn within the reach of the traverse guide as necessary.
  • the yarn is shown to find itself behind the right wing of the traverse guide while the guide is moving towards the transfer link end (Fig 5 - part a).
  • the yarn would have no mechanism to find its way into its intended position.
  • the intended position is in the groove.
  • the yarn finds itself inside the 'C shape of the transfer link while the traverse guide is moving towards the turret end (Fig 6 - part a).
  • the traverse guide travels up to the turret end (Fig 6 - part b) and upon its return finds itself positioned under the yarn when it reaches the transfer link (Fig 6 - part c) thereby allowing the yarn to slip over its external edge and get into its intended position (Fig 6 - part d).
  • the yarn could be placed over the left wing of the guide or at any position along the cam box, while the traverse guide is moving towards the transfer link (Fig 7 - part a).
  • the traverse guide simply reverses its motion at the transfer link end and moves towards the turret end.
  • the wing tip of the traverse guide will get underneath the yarn and the yarn, which is under tension, will pull itself into the central groove.
  • the traverse guide pushes the yarn right up to the turret end of the cam box where with the help of a turret bar, it gets underneath the yarn (Fig 7 - part b) thereby allowing the yarn to get into its intended position (Fig 7 - part c).
  • One other key feature of the present invention is that is smaller in size than some of the conventional guides. This improves the performance of the guide, which operates at a very high speed, and also is more economical. Further, it has been observed that the innovative inner profile (5e), particularly near the central groove (5b), facilitates easy entry of the yarn into the central groove (5b). Consequently, the advantage of the present invention is that the positional synchronization between the movements of traverse guide, transfer device and other relevant automatic winder parts becomes either irrelevant or unimportant and invented device performs with more reliability. It is evident from the foregoing description that the present invention has the following embodiments:
  • a novel device for efficiently guiding the advancing yarn during yarn winding in a turret type autowinder comprising a traverse guide characterized in that the profile of its two flanks is selected from a group comprising
  • said traverse guide further has at least one groove (5b) for securing in place the advancing yarn (3), and said two flanks (5c) being attached to a stem (5 a) with which it is fitted in a turret type autowinder, and wherein said traverse guide moves laterally along the traverse device while guiding the advancing yarn during the yarn transfer process.
  • said transfer link (6) has a hook (6a), and further wherein said traverse guide (5) and said transfer link (6) are positioned relatively to each other by positioning said traverse guide (5) along the traverse device
  • said device being mounted on a traverse device of a typical automatic turret transfer machine.

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  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Abstract

La présente invention concerne des enrouleurs automatiques à tourelle pour le dépôt d'un fil alimenté constamment (3) autour d'une bobine rotative lors de la course du fil. Le dispositif selon l'invention permet également d'améliorer l'efficacité de transfert de fil d'une alimentation en continu lors d'une opération de changement de bobine. La présente invention comporte un guide de course de fil (5) d'un nouveau modèle qui assure le transfert réussi du fil se déplaçant vers la bobine (2) même lorsque le fil n'est pas transféré en retour avec précision au guide de course de fil.
PCT/IB2010/055441 2009-11-30 2010-11-26 Dispositif permettant un guidage efficace de fil lors du transfert de fil dans un enrouleur automatique à tourelle WO2011064744A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2458/DEL/2009 2009-11-30
IN2458DE2009 2009-11-30

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WO2011064744A1 true WO2011064744A1 (fr) 2011-06-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110713065A (zh) * 2019-11-15 2020-01-21 苏州市卡尔精密陶瓷有限公司 一种纺机绕线用兔子头

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502282A (en) * 1966-11-03 1970-03-24 Rieter Ag Maschf Traverse yarn guide
DE3106947A1 (de) * 1980-03-01 1982-04-15 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid "spulvorrichtung zum aufspulen von flachfaeden zu zylindrischen kreuzspulen"
EP0372517A2 (fr) 1988-12-07 1990-06-13 Tosoh Corporation Milieu d'enregistrement magnéto-optique, et son procédé de fabrication
EP1507730A1 (fr) * 2002-05-27 2005-02-23 Georg Sahm Gmbh & Co. Kg Procede et bobineuse pour l'enroulement d'un fil alimente en continu sur un tube pour former une bobine
FR2899571A1 (fr) * 2006-04-10 2007-10-12 Saint Gobain Vetrotex Procede de fabrication d'un enroulement a fils separes
WO2009031163A1 (fr) 2007-09-07 2009-03-12 Lohia Starlinger Limited Dispositif permettant d'introduire un fil dans le dispositif de préhension d'un bobinoir automatique du type à barillet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502282A (en) * 1966-11-03 1970-03-24 Rieter Ag Maschf Traverse yarn guide
DE3106947A1 (de) * 1980-03-01 1982-04-15 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid "spulvorrichtung zum aufspulen von flachfaeden zu zylindrischen kreuzspulen"
EP0372517A2 (fr) 1988-12-07 1990-06-13 Tosoh Corporation Milieu d'enregistrement magnéto-optique, et son procédé de fabrication
EP1507730A1 (fr) * 2002-05-27 2005-02-23 Georg Sahm Gmbh & Co. Kg Procede et bobineuse pour l'enroulement d'un fil alimente en continu sur un tube pour former une bobine
FR2899571A1 (fr) * 2006-04-10 2007-10-12 Saint Gobain Vetrotex Procede de fabrication d'un enroulement a fils separes
WO2009031163A1 (fr) 2007-09-07 2009-03-12 Lohia Starlinger Limited Dispositif permettant d'introduire un fil dans le dispositif de préhension d'un bobinoir automatique du type à barillet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110713065A (zh) * 2019-11-15 2020-01-21 苏州市卡尔精密陶瓷有限公司 一种纺机绕线用兔子头

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