EP2562112B1 - Device for traversing of yarn wound-up on the bobbin - Google Patents

Device for traversing of yarn wound-up on the bobbin Download PDF

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Publication number
EP2562112B1
EP2562112B1 EP12181169.9A EP12181169A EP2562112B1 EP 2562112 B1 EP2562112 B1 EP 2562112B1 EP 12181169 A EP12181169 A EP 12181169A EP 2562112 B1 EP2562112 B1 EP 2562112B1
Authority
EP
European Patent Office
Prior art keywords
traversing
traversing rod
rod
magnets
magnet
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.)
Not-in-force
Application number
EP12181169.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2562112A1 (en
Inventor
Frantisek Foune
Martin Pustka
Pavel Sidlof
Petr Skop
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.)
Rieter CZ sro
Vuts AS
Original Assignee
Rieter CZ sro
Vuts AS
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 Rieter CZ sro, Vuts AS filed Critical Rieter CZ sro
Publication of EP2562112A1 publication Critical patent/EP2562112A1/en
Application granted granted Critical
Publication of EP2562112B1 publication Critical patent/EP2562112B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2818—Traversing devices driven by rod
    • 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
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2881—Traversing devices with a plurality of guides for winding on a plurality of bobbins
    • 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
    • B65H54/38—Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • B65H54/385—Preventing edge raising, e.g. creeping arrangements
    • B65H54/386—Preventing edge raising, e.g. creeping arrangements with energy storing means for recovering the kinetic energy at the end of the traversing stroke
    • 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

  • a device for traversing of yarn wound-up on a spool fitted into the workplace of a textile machine comprising a longitudinal traversing rod common for multiple workplaces and coupled with a drive imparting straight reverse motion to it and a controlling system determining the position of the rod dead points, whereas the longitudinal traversing rod is parallel with a longitudinal winding shaft intended for numerous workplaces, further comprising at least two magnetic pairs, one of the magnets of which is always located on the frame of the machine, whereas the other magnet is located on the traversing rod.
  • the traversing of yarn at spool winding is commonly performed by means of a through traversing rod passing along one side of the machine's workplaces.
  • the traversing rod is as long as 50 metres for instance, which means its weight is substantially high.
  • Cross-wound cylindrical or conical spools roll off their wound-up surface against winding rollers, the rotation axis of which is parallel to the axis of the traversing rod and the traversing rod performs straight reverse motion, its travel matching the length of the surface line of the wound spool's package.
  • the velocity of the yarn driven to the wound-up spool is high, which requires a high frequency of the straight reverse motion of the traversing rod.
  • the curve of the traversing rod motion to be saw-like, i.e. the velocity of the traversing rod to be constant and to change in step at dead points to reach the same velocity of the opposite sense.
  • the travel remains constant and the position of both dead points slowly shifts in one and the other direction concurrently.
  • the size of the travel changes and the positions of the dead points mutually shift in an opposite sense, by means of which the size of the travel increases and decreases in turns. From the point of view of the quality of the build the second solution is more advantageous, although it is not easy to implement with a cam mechanism drive or a mechanism where the servomotor does not change the sense of rotation.
  • the problem is solved either by means of a big nominal driving torque of the servomotor and/or the accumulation of the kinetic energy produced at braking of the inertial mass of the traversing rod before the dead point and a reverse release of the energy accumulated at starting the traversing rod after the dead point.
  • the moment of inertia of servomotors with big driving torques is big and it increases the total reduced moving mass, thus the achievable increase in the acceleration of the rod is little or none.
  • Another problem besides the provision of the required shape of the spool's build edges is the production of concurrently deposited bands of coils of yarn located close to each other at augmenting the diameter of the wound-up spool.
  • bands are periodically produced breaking the shape of the build and complicating the progress of winding. That is prevented by gradual changes to the frequence of motion of the traversing rod based on certain prescriptions.
  • a first mechanism of a constant travel provides the basic approximately saw-like travel of the traversing rod including velocity changes at dead points.
  • the second superimposed mechanism makes for slow concurrent shifts of the dead points.
  • Both mechanisms are loaded by a total force necessary to induce the motion of the rod.
  • the dissolution of the bands is performed either by means of a controlled variator usually driven by another cam mechanism, or including a frequency converter into the power supply circuit of the driving electric motor.
  • the traversing box comprising those mechanisms is placed on only one of the sides of the machine, thus the long traversing rod is sensitive to production of vibrations. It spreads not only longitudinal waves of deformations, but transverse waves as well, caused by buckling stress of the rod and its deflection from the guide bearings.
  • the deflection results in the increase of frictional forces.
  • the transverse waves on the rod are of lower velocity and the resulting oscillation of the rod is usually very complex.
  • the motion of the free end of the traversing rod thus differs from the motion of its part located close to the drive mechanism.
  • Some devices based on the prior art use springs-to absorb the energy of the moving mass forces. It is advantageous for such spring to have a non-linear characteristic, matching the force necessary to achieve the required motion of the rod much better. With mechanical or pneumatic springs the provision of such parameters is difficult. In some cases, rubber or plastic bumpers acting on the traversing rod in the area of its dead points are used to load off the cam mechanisms. However, such springs cause strokes and oscillations of the rod and their service life is rather low.
  • those devices usually do not allow setting the travel of the traversing rod and thus changing the width of the build on the spool.
  • the traversing rod is stressed by big compression forces requiring a respective increase of the cross-section of the rod, which results in subsequent increase in the weight of the traversing rod and thus increasing undesirable inertia forces.
  • Even with substantial cross-sections of the traversing rod the oscillation usually results in a different course of the travel of the rod on different spots of the machine.
  • Two pairs of magnets 101 - 201 and 102 - 202 are used within it, the first magnets 101, 102 of both pairs of magnets are placed in an adjustable way on the machine frame 100 and spaced mutually.
  • the second magnets 201, 202 of both pairs of magnets are fixed to the traversing rod 200 placed in the machine frame 100 by means of a guide 10.
  • the magnet 201, 202 fixed to the traversing rod 200 approximates and recedes the magnet 101, 102 placed on the machine frame 100 in turns, the same poles of the magnets of each cooperating pair are directed towards each other.
  • the magnets repel each other, the maximum repelling force matching the least mutual distance of the magnets' fronts achieved at the traversing rod's dead points.
  • the minimum distance is set by means of shifting the magnet located on the machine frame, which is performed by axial servomotors not represented in the figure.
  • the magnets' repelling force value is selected based on the type of the wound-up yarn considering its thickness and flexibility. Thereat, it is necessary to respect the thermal expandability of the rod, the resistances acting against the motion of the rod and, of course, the operation of the superimposed mechanism controlling the shifts of the traversing rod's dead points by reason of overlaying the edges of the build.
  • setting the mutual minimum distance of the magnets of one pair, which is a value of tenths of millimetres, and fixing the adjusting magnet against the machine frame require a high level of accuracy.
  • CZ PV 2007-214 Another disadvantage of placing the magnets according to CZ PV 2007-214 is the fact that the magnets attenuate the longitudinal oscillation of the traversing rod only with motions in direction away from the drive mechanism of the rod for traversing. Even though such attenuation is significant as it is performed at the moment of the traversing rod is disadvantageously buckle-stressed and the aim of CZ PV 2007-214 is achieving exactly that effect, the absence of attenuation of the longitudinal oscillation of the traversing rod at its motion in the opposite direction proves that the solution is not ideal as all sources of vibrations, noise and increased loading and wear have not been completely dealt with.
  • the aim of the invention is to remove or at least significantly reduce the insufficiencies of the prior art and to achieve a decrease in vibrations, noise and wear and achieve higher operational parameters of the traversing mechanism and thus the machine as a whole by means of attenuating the longitudinal vibrations of the rod's motion towards the drive mechanism of the traversing rod as well.
  • the aim of the invention is achieved by means of a device for traversing the yarn wound-up on a spool deposited in the winding system of a textile machine's workplace, which comprises at least two magnetic pairs, each of which includes mutually repelling magnetic poles, one of which is always located on the machine frame, the other is located on the traversing rod, the principle of which is based on the fact that at least two magnetic pairs are located in the area of the traversing rod's free end. Even at a travel, at which the traversing rod is being pulled, the longitudinal oscillation of parts of the traversing rod's free end is virtually attenuated with such arrangement.
  • the magnetic pairs may include two fixed magnets secured in a way allowing rearrangement to the machine frame and at least one common moving magnet fastened to the traversing rod.
  • each magnetic pair comprises a fixed magnet fastened in a way allowing rearrangement to the machine frame and one magnet secured to the traversing rod.
  • the device in another application, includes three magnetic pairs, one of which is located in the area of the traversing rod's end connected to the traversing box.
  • the output of the servomotors is a straight shift of the fixed magnets along the traversing rod, the output member of the servomotor is fixed to the frame after performing the straight shift.
  • At least one of the magnetic pairs is formed by a pair of Halbach arrays.
  • the major advantage of the device according to the invention is the significant weight reduction of the arrangement of magnets compared to bipolar magnets, which is particularly important with magnets fastened to the traversing rod and participating in the value of its inertial mass.
  • Fig. 1 shows the device according to the prior art
  • Fig. 2a and 2b show two alternative priority designs of the device according to the invention
  • Fig. 3 shows another design of the device according to the invention
  • Fig. 4 shows the course of the velocity of the start and end of the traversing rod with the device according to the prior art
  • Fig. 5 shows a comparison of the courses of the longitudinal position of the start and the end of the traversing rod with a device according to the prior art and according to the invention.
  • the traversing rod 2 is arranged by means of a guide 10.
  • the traversing rod 2 is driven by means of a not represented crank or cam mechanism arranged in the traversing box 3.
  • the mechanism transforms the rotational motion of the driving motor's output shaft to straight reverse motion of the traversing rod 2 .
  • An alternative application uses a linear driving servomotor.
  • the traversing rod 2 In the free end area of the traversing rod 2 there are moving magnets 21 and 22, firmly fastened to the traversing rod 2 .
  • On the machine frame 1 are arranged fixed magnets 11 and 12 in a way allowing their sliding.
  • the magnets are disc-shaped with a central opening and they are arranged coaxially with the traversing rod 2.
  • the traversing rod 2 passes through the openings of the fixed magnets 11, 12 freely. With another not represented mutual ordering the magnets are arranged outside the traversing rod.
  • the moving magnet 21 and the fixed magnet 11 and the moving magnet 22 and the fixed magnet 12 form cooperating magnetic pairs.
  • the magnets of each pair 11 - 21, 12 - 22 are directed towards each other with their opposite poles so that they repel each other.
  • the fixed magnets 11 , 12 are adjustable against the frame, whereas are fixed in positions so that the difference of the L 1 distance of nearing poles of fixed magnets 11 , 12 and the L 2 distance of reverse poles of moving magnets 21 , 22 fixed to the traversing rod 2 is equal to the sum of the travel of the traversing rod 2 and the required clearances remaining between the nearing poles of one and the other pair of magnets 11 - 21 , 12 - 22 at the left and right dead point of the traversing rod 2 and preventing mutual contacts of the magnets of each pair.
  • the two magnetic pairs are formed from a single moving magnet 20, replacing two moving magnets 21 , 22 , and of two fixed magnets 11 , 12.
  • the device according to the invention includes another pair of magnets comprising a moving magnet 23 fixed on the traversing rod 2 and a fixed magnet 13 located in a way allowing its slide on the machine frame 1 , placed close to the traversing box 3 .
  • the fixed magnet 13 is adjusted against the frame so that the required clearances as mentioned above are present between the nearing poles of pairs of magnets 13 - 23 and 12 - 22 at the right dead point of the traversing rod 2 .
  • the magnets 11 , 12 , 13 , 21 , 22 , 23 are standard bipolar permanent magnets, in another example of embodiment are multi-polar and forming a Halbach array.
  • servomotors generally known to those skilled in the art are advantageously used for readjusting fixed magnets 11 , 12 , 13 against the machine frame 1 , while the servomotors are stabilized after adjusting the position of the fixed magnets.
  • the servomotors of fixed magnets 11 , 12 , 13 are advantageously coupled with a not demonstrated control unit, used for controlling the positions of the dead points of the traversing rod 2 .
  • the device may include sensors of the axial position of the traversing rod 2 or sensors of the value of the repelling force, which are also not demonstrated.
  • Fig. 4 shows the course of velocity v of parts of the traversing rod 200 with the device according to the prior art.
  • the lighter curve v 1 is the course of the velocity of parts of the traversing rod 200 on the spot 203 of coupling with the traversing box 300 and the darker curve v 2 is the course of the velocity of parts of the traversing rod 200 on the spot 204 the free end of the traversing rod 200.
  • the traversing rod 200 is pushed (it moves from the left to the right dead point), at travel z 2 the traversing rod 200 is pulled (it moves from the right to the left dead point). It is clear that when the traversing rod 200 is pushed, its longitudinal oscillation is significantly reduced. On the contrary, at reverse motion, at which the traversing rod 200 is pulled, major longitudinal vibrations occur.
  • Fig. 5 shows the course p s of parts of the traversing rod 200 on the spot 203 of coupling with the traversing box 300 and the spot 204 at the free end of the traversing rod 200 with a device according to the prior art based on Fig. 1
  • the lower part of it shows the course p v of parts of the traversing rod 2 on the spot 24 of coupling with the traversing box 3 and on the spot 25 at the free end of the traversing rod 2 with a device according to the invention based on Fig. 2 and 3 .
  • the design according to Fig. 2 is more advantageous than the design according to Fig. 3 .
  • the lower number of magnets results in a lower weight of the traversing rod 2 and further reduction of costs for each pair of magnets 13-23 and the respective axial servomotor for shifting the fixed magnet 13.
  • the arrangement of magnets according to Fig. 2a, 2b is advantageously used when the motion of the traversing rod 2 generated by the traversing box 3 is smooth, i.e. without strokes, when the part of the traversing rod 2 near the traversing box 3 is sufficiently stiff and when there is no requirement for dividing the dampening between two pairs of magnets 12 - 22 and 13 - 23 with the same sense of the dampening effect.
  • the arrangement according to Fig. 3 may meet more universal requirements, especially due to the fact that it allows to influence the forces acting on both ends of the traversing rod 2 by means of different distances of magnets 12 - 22 and 13 - 23 and to achieve the occurrence of even tensile stress in the traversing rod 2.
  • the course of the resulting force can be changed and adapted to the force necessary for starting and braking the traversing rod 2 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP12181169.9A 2011-08-25 2012-08-21 Device for traversing of yarn wound-up on the bobbin Not-in-force EP2562112B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ20110525A CZ303337B6 (cs) 2011-08-25 2011-08-25 Zarízení k rozvádení príze navíjené na cívku

Publications (2)

Publication Number Publication Date
EP2562112A1 EP2562112A1 (en) 2013-02-27
EP2562112B1 true EP2562112B1 (en) 2014-06-18

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ID=46576063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12181169.9A Not-in-force EP2562112B1 (en) 2011-08-25 2012-08-21 Device for traversing of yarn wound-up on the bobbin

Country Status (2)

Country Link
EP (1) EP2562112B1 (cs)
CZ (1) CZ303337B6 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4541746A1 (de) * 2023-10-16 2025-04-23 Lunatone Industrielle Elektronik GmbH Fadenführsystem zum führen eines fadens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116463755B (zh) * 2023-02-27 2025-06-13 浙江康立自控科技有限公司 一种倍捻机纱筒修边成形控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6515444A (cs) * 1965-11-27 1967-05-29
DE19708936A1 (de) * 1997-03-05 1998-09-10 Novibra Gmbh Fadenchangiervorrichtung an einer Kreuzspulen herstellenden Textilmaschine
DE19750836A1 (de) * 1997-11-17 1999-05-20 Schlafhorst & Co W Hülsenvorlageeinrichtung für Kreuzspulen herstellende Textilmaschinen
DE10244495A1 (de) * 2002-09-25 2004-04-08 Saurer Gmbh & Co. Kg Textilmaschine mit einer Vielzahl von Arbeitsstellen
CZ302884B6 (cs) * 2007-03-22 2012-01-04 Rieter Cz S.R.O. Zarízení k rozvádení príze na textilních strojích
DE102008000601A1 (de) * 2007-03-22 2008-09-25 Rieter Cz A.S. Garnchangiereinrichtung auf den Textilmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4541746A1 (de) * 2023-10-16 2025-04-23 Lunatone Industrielle Elektronik GmbH Fadenführsystem zum führen eines fadens

Also Published As

Publication number Publication date
CZ2011525A3 (cs) 2012-08-01
EP2562112A1 (en) 2013-02-27
CZ303337B6 (cs) 2012-08-01

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