EP0710616A1 - Procédé et dispositif pour enrouler des fils - Google Patents

Procédé et dispositif pour enrouler des fils Download PDF

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Publication number
EP0710616A1
EP0710616A1 EP94117477A EP94117477A EP0710616A1 EP 0710616 A1 EP0710616 A1 EP 0710616A1 EP 94117477 A EP94117477 A EP 94117477A EP 94117477 A EP94117477 A EP 94117477A EP 0710616 A1 EP0710616 A1 EP 0710616A1
Authority
EP
European Patent Office
Prior art keywords
speed
maximum
values
value
traversing
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.)
Withdrawn
Application number
EP94117477A
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German (de)
English (en)
Inventor
Matthias Bührer
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Zinser Textilmaschinen GmbH
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 Zinser Textilmaschinen GmbH filed Critical Zinser Textilmaschinen GmbH
Publication of EP0710616A1 publication Critical patent/EP0710616A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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 invention relates to a method and an apparatus for carrying out the method according to the preambles of claims 1 and 13.
  • the reversal point of the yarn of the current winding lies essentially above the reversal point of the previous stroke, so that the turns of successive layers of turns are placed directly one above the other.
  • Image windings lead to malfunctions when the spools are unwound. Furthermore, image windings lead to vibrations of the winding machine during winding, so that the friction roller of the commonly used friction drive of the winding machine comes to rest and thus causes the friction roller to rest restlessly on the spool as well as slippage between the friction roller and spool or damage to the spool. Image windings must therefore be avoided, especially when winding up smooth threads, such as man-made fibers.
  • DE-A-21 65 045 discloses a method for image breaking in which the traversing speed of the thread guide is switched shortly before an integer ratio of the number of revolutions of the spool to the number of double strokes per unit of time is reached.
  • a disadvantage of this method is that it can only be usefully used in the case of individually driven winding units, each winding unit having to be assigned one or more sensors for detecting impending integer ratios of speed to double stroke rate per time unit and a control device for reversing the traversing speed.
  • This method can therefore only be used in rare cases since, for example, textile or spinning machines almost always have a large number of winding units, which are often not individually driven.
  • this method if it can be used at all, involves considerable effort.
  • DE-A-28 55 616 therefore proposed an improved further development of this method, in which a non-periodic change in the traversing speed in the sense of a non-periodic wobble curve is proposed.
  • a non-periodic change in the traversing speed in the sense of a non-periodic wobble curve is proposed.
  • the values for the acceleration or for the deceleration of the traversing movement are not changed periodically, the time intervals between the switching from acceleration to deceleration or vice versa remaining constant.
  • the non-periodic wobble curve is created by amplitude modulation of a periodic wobble function.
  • the non-periodic wobble curve arises from frequency modulation of a periodic wobble curve.
  • This known method for avoiding image windings should preferably be carried out in such a way that the absolute amount of the acceleration or deceleration of the oscillating movement is kept constant and the maximum or minimum values at which the switchover between acceleration and deceleration or vice versa takes place are not periodic to be changed.
  • the invention is therefore based on the object of providing a method and a device for winding threads, the aforementioned disadvantages being avoided and an optimal bobbin construction being ensured with little outlay while largely avoiding image windings.
  • the method according to the invention produces a non-periodic wobble curve in which the random selection of the changes both the maximum and minimum values of the traversing speed and the time intervals between the reversal points also the amount of the acceleration or Deceleration of the traversing speed changes constantly statistically.
  • different value ranges are used to determine the time intervals between the reversal points of the wobble curve, depending on whether a time interval between a minimum and a maximum of the wobble curve or a maximum and a minimum the sweep curve is to be determined.
  • a value is selected alternately from these value ranges.
  • the value ranges for the maximum and minimum values of the traversing speed and the value ranges for the time intervals between these reversal points of the wobble curve are each composed of a constant mean value and a value range superimposed on them.
  • the effort involved in the random determination of the reversal points of the wobble curve can be reduced in that, for example, the two value ranges for the maximum and minimum values of the traversing speed are each composed of a different mean value and a single value range superimposed on it.
  • this procedure can also lead to a reduction in the computational effort in determining the time intervals even in the case of different value ranges for the time intervals between a maximum and a minimum or a minimum and a maximum of the wobble curve.
  • a periodic wobble curve is initially used to determine the non-periodic wobble curve, in which the time intervals between the reversal points each equal the mean values of the value ranges for the random determination of the time intervals and the maximum and minimum values of the traversing speed are chosen equal to the mean values of the value ranges for the random determination of these values.
  • the value ranges are then value ranges shifted symmetrically to zero.
  • a two-dimensional value range is then assigned to each reversal point of this periodic wobble curve, which is formed from the value ranges superimposed on the mean values.
  • the reversal points of the non-periodic wobble curve are then determined by the random selection of a pair of coordinates from this two-dimensional value range, the respective mean values (taking into account all signs) being added to the coordinates.
  • next but one reversal point of the non-periodic wobble curve must be determined before the next reversal point of the traversing movement is reached. From the two coordinate pairs of these reversal points, for example, the preferably constant acceleration of the traversing movement can then be determined, which is required by the maximum or minimum value of the traversing speed of the respective to reach the next but one reversal point within the specified time interval.
  • each two-dimensional value range of the periodic wobble curve can be divided into a predetermined number of sub-ranges, and each sub-range can be assigned a discrete pair of values for a corresponding reversal point of the non-periodic wobble curve.
  • the random selection of one of the sub-ranges of the two-dimensional value ranges is preferably carried out with the same probability.
  • the peripheral speed of the bobbin is adapted in accordance with the instantaneous traversing speed so that the thread length wound up per unit of time is constant. In this way, a disadvantageous misalignment, in particular when winding synthetic fibers, is avoided.
  • the two-dimensional range of values for randomly determining the reversal points of the non-periodic wobble curve can be mapped to a two-dimensional range of values for determining the corresponding reversal points of the curve for the peripheral speed of the coil, taking into account the corresponding mean values.
  • the time intervals between the reversal points there is no change in the time intervals between the reversal points, since the change in the coil circumferential speed must take place synchronously with the change in the speed of the traversing movement.
  • the device for carrying out the method according to the invention essentially consists of a winding device known per se, which comprises a central control unit which controls or regulates the traversing movement of the thread guide and possibly the peripheral speed of the bobbin in accordance with the method according to the invention.
  • a thread 2 is fed to the winding device 1 at a constant speed.
  • the thread 2 can be supplied, for example, by a godet 3 driven at a constant speed with laying roller 3a or by another delivery mechanism.
  • a traversing gear 5 driven by a variable-speed motor 4 with a reciprocating thread guide 6 guides the thread 2 with the same or variable traversing width over the winding length of a package 7.
  • the movement of the thread guide 6 is preferably parallel to the axis of the package 7.
  • the package 7 is rotated on its periphery by a friction roller 9 driven by a variable-speed motor 8.
  • the drive by means of a friction roller offers the advantage that the peripheral speed of the package 7 is independent of the diameter of the package, i.e. of the number of windings remains constant without the need for complex control or regulation of a drive.
  • the drive motors 4 and 8 are connected to a central control unit 9 which controls the two motors 4, 8 in the manner according to the invention described below.
  • the central control unit 9 determines a non-periodic wobble curve 10 (FIG. 2a) for the traversing speed v c according to which the thread guide 6 is moved.
  • the traversing speed v c is defined as the number of back and forth movements (double strokes) of the thread guide 6 per unit of time.
  • the acceleration or deceleration of the traversing speed v c should preferably be kept constant between these reversal points 10a, 10b of the wobble curve 10.
  • a separate range of values can be provided for each of the values to be determined, from which the respective value is selected at random. This means that separate value ranges are used for the maximum values and minimum values of the speed, as well as for determining the time intervals between a minimum 10b and a maximum 10a or a maximum 10a and a minimum 10b.
  • the random selection of the coordinates of the reversal points 10a, 10b of the wobble curve 10 can be carried out in different ways. Two of these methods are selected and described in detail below. However, it goes without saying that the invention is not restricted to these two exemplary embodiments.
  • value ranges can of course also be represented in such a way that a value range shifted by a corresponding value is used and the values selected at random for the aforementioned parameters are each added to the value (taking both signs into account) which corresponds to the shift in the value range corresponds.
  • the value ranges are preferably transformed such that the original value range is shifted symmetrically to zero, the value of the shift being equal to the respective mean value.
  • the four aforementioned value ranges are reduced to only two value ranges, namely to one for determining the maximum and minimum values of the traversing speed and to another for determining the time intervals between a minimum and the subsequent maximum or vice versa .
  • different constant value signs must then be correctly added to the values randomly selected from these value ranges.
  • a prerequisite for this possibility to reduce the effort is a constant (possibly standardized) difference between the boundaries of the two summarized value ranges. As a rule, this will not have an adverse effect.
  • the maximum or minimum value of the traversing speed for the reversal point of the non-periodic wobble curve 10 to be determined in each case is first selected from the relevant range of values and, if appropriate, a constant value is added.
  • the central control unit 9 must know whether the reversal point to be determined is a maximum 10a or a minimum 10b.
  • the minima 10b and the maximum 10a of the non-periodic wobble curve 10 alternate, the central control unit 9 only has to select the desired maximum or minimum value from the respective other value range or, if only a single value range is used, the other Add constant value to the randomly selected value.
  • the random selection of the time intervals is also carried out in an analogous manner in the two methods described below for determining the non-periodic wobble curve.
  • the only difference between the methods is the temporal sequence of the randomly selected values for the time intervals between the reversal points.
  • One way to concatenate the time intervals is that they are simply strung together; I.e. the end point of the respective previous time interval coincides with the start point of the subsequent, randomly selected time interval.
  • FIG. 2a Another possibility for chaining the randomly selected time intervals is described in FIG. 2a. It is assumed that the value ranges that make up the time intervals selected at random, are shown in the form that a constant mean value is superimposed on a correspondingly symmetrically shifted value range to zero. The chaining of the randomly selected time intervals, which are then also in the form of "constant mean plus correctly added randomly selected value", is done in such a way that the next time interval is not at the end point of the previous time interval but at the end point of the Average of the previous time interval is appended.
  • the entire method for determining the non-periodic wobble curve 10 can therefore also be interpreted in such a way that a periodic wobble curve 11 is initially assumed, the reversal points 11a, 11b of which are preferably each determined by the coordinates of the constant mean values of the value ranges shifted symmetrically to zero are.
  • the maxima and minima of the periodic wobble curve are shifted in their temporal position by the amount randomly selected from the shifted value range.
  • each maximum 11a and each minimum 11b of the symmetrical wobble curve 11 is assigned a two-dimensional value range 12.
  • This range of values is preferably of rectangular design, its extent in the direction of the abscissa being the range of values shifted symmetrically to zero for the random selection of a maximum or a minimum and preferably in the direction of the ordinate corresponds to the value range shifted symmetrically to zero for the random selection of the maximum or minimum value for the traversing speed.
  • this method can also be modified in such a way that value ranges of a different shape are used instead of a rectangular two-dimensional value range.
  • value ranges of a different shape are used instead of a rectangular two-dimensional value range.
  • the preferably rectangular two-dimensional value ranges can be divided into individual partial areas, with each partial area having a discrete value for the maximum or minimum traversing speed and a discrete value for the time interval of this reversal point from the time position of the previous one Reversal point of the periodic wobble curve is assigned.
  • the random selection of the coordinates of the reversal point of the non-periodic wobble curve can then be carried out in an analogous manner by the random selection of the discrete values for the displacement of the corresponding reversal point of the periodic wobble curve in the direction of the abscissa and ordinate.
  • Another possibility for the random determination of the position of the reversal points is that the individual partial areas of the two-dimensional value range are numbered and a number is picked out at random from this number of numbers. The corresponding pair of coordinates for the reversal point can then be found, for example, in a corresponding assignment table.
  • the circumferential speed of the package 7 must be adapted accordingly to avoid distortion errors or to ensure a satisfactory package build. There is an essentially inverse relationship between the traversing speed v c and the required coil circumferential speed v u .
  • each two-dimensional range of values can be transformed into a corresponding range of values for the peripheral speed v u and stored in the control unit 9. Through this mapping, the two-dimensional value ranges only experience a compression in the ordinate, since the peripheral speed v u must be changed synchronously with the traversing speed v c .

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
EP94117477A 1993-11-05 1994-11-05 Procédé et dispositif pour enrouler des fils Withdrawn EP0710616A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934337891 DE4337891A1 (de) 1993-11-05 1993-11-05 Verfahren und Vorrichtung zum Aufspulen von Fäden
DE4337891 1994-11-05

Publications (1)

Publication Number Publication Date
EP0710616A1 true EP0710616A1 (fr) 1996-05-08

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EP94117477A Withdrawn EP0710616A1 (fr) 1993-11-05 1994-11-05 Procédé et dispositif pour enrouler des fils

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EP (1) EP0710616A1 (fr)
DE (1) DE4337891A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19628402A1 (de) * 1996-07-15 1998-01-22 Schlafhorst & Co W Verfahren zur Vermeidung von Bildwicklungen
DE19548257A1 (de) * 1995-12-22 1997-10-09 Schlafhorst & Co W Verfahren zur Vermeidung von Bildwicklungen beim Wickeln von Kreuzspulen
DE19916669A1 (de) 1999-04-14 2000-11-02 Stahlecker Fritz Vorrichtung zum Aufspulen von Fäden auf Spulen mit wilder Kreuzwicklung
DE10209851A1 (de) * 2002-03-06 2003-09-18 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zum Aufwinden eines Fadens an einer Kreuzspuleinrichtung
DE102005054356A1 (de) * 2005-11-15 2007-05-16 Saurer Gmbh & Co Kg Verfahren zur Vermeidung von Bildwicklungen
DE102008032654A1 (de) * 2008-07-10 2010-01-14 Oerlikon Textile Gmbh & Co. Kg Verfahren und Vorrichtung zur Bildstörung beim Aufwickeln eines Fadens
DE102011005330A1 (de) * 2011-03-10 2012-09-13 Rieter Ingolstadt Gmbh Verfahren zur Vermeidung von Bildwicklungen
ITMI20111377A1 (it) * 2011-07-25 2013-01-26 Fadis Spa Dispositivo per l'avvolgimento di un filo su un tubetto di raccolta, particolarmente per macchine roccatrici o simili.
CN109335841B (zh) * 2018-08-23 2020-11-10 杨凌美畅新材料股份有限公司 一种金刚线绕线方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2855616A1 (de) * 1978-12-22 1980-06-26 Barmag Barmer Maschf Verfahren zum aufspulen von faeden
EP0256383A1 (fr) * 1986-08-09 1988-02-24 B a r m a g AG Méthode pour embobiner des fils

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034057A1 (de) * 1990-10-26 1992-04-30 Schlafhorst & Co W Verfahren und vorrichtung zur drehzahlsteuerung einer spuleinrichtung
DE4112768A1 (de) * 1991-04-19 1992-10-22 Hacoba Textilmaschinen Verfahren zum wickeln von kreuzspulen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2855616A1 (de) * 1978-12-22 1980-06-26 Barmag Barmer Maschf Verfahren zum aufspulen von faeden
EP0256383A1 (fr) * 1986-08-09 1988-02-24 B a r m a g AG Méthode pour embobiner des fils

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Publication number Publication date
DE4337891A1 (de) 1995-05-11

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