EP0093258A2 - Procédé pour éviter des rubans d'ordre entier ou fractionnaire en bobinage croisé au hasard d'un fil - Google Patents

Procédé pour éviter des rubans d'ordre entier ou fractionnaire en bobinage croisé au hasard d'un fil Download PDF

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Publication number
EP0093258A2
EP0093258A2 EP83102811A EP83102811A EP0093258A2 EP 0093258 A2 EP0093258 A2 EP 0093258A2 EP 83102811 A EP83102811 A EP 83102811A EP 83102811 A EP83102811 A EP 83102811A EP 0093258 A2 EP0093258 A2 EP 0093258A2
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EP
European Patent Office
Prior art keywords
mirror
value
speed
safety distance
winding
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.)
Granted
Application number
EP83102811A
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German (de)
English (en)
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EP0093258A3 (en
EP0093258B1 (fr
Inventor
Heinz Dr. Dipl.-Ing. Schippers
Erich Dr.-Ing. Lenk
Gerhard Dr. Dr.-Ing. Martens
Manfred Dr.-Ing. Mayer
Werner Pieper
Siegfried Putsch
Siegmar Dipl.-Ing. Gerhartz
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 Barmag AG
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Barmag Barmer Maschinenfabrik AG
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Priority claimed from DE19823219880 external-priority patent/DE3219880A1/de
Application filed by Barmag Barmer Maschinenfabrik AG filed Critical Barmag Barmer Maschinenfabrik AG
Publication of EP0093258A2 publication Critical patent/EP0093258A2/fr
Publication of EP0093258A3 publication Critical patent/EP0093258A3/de
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    • 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

  • mirror interference the image or S p iegelstö- tion when winding threads in a wild winding.
  • the thread When winding threads into bobbins, the thread is moved back and forth across its direction of travel over a certain distance (stroke), which essentially corresponds to the length of the bobbin. This back and forth movement of the thread is referred to as oscillation.
  • a characteristic measure of the traversing speed is the double stroke rate. It is double stroke as the sum of two successive strokes, that is, a forward movement and a return movement referred to, and the cycle rate is the number of double rubs p ro unit time. If the speed of the spindle per unit of time and the number of double strokes depend on each other, for example as a result of a gear connection between the spindle and traversing drive, a precision cross winding is created.
  • this invention deals with all types of winding in which the speed of the spindle is not constantly dependent on the number of double strokes (wild cross winding, wild winding), in particular those cross windings which, according to DIN 61 801, are characterized by a constant ratio between the double stroke number and the peripheral speed mark the coil. Wild cross windings in the narrower sense of DIN 61 801 are especially produced when winding up man-made fibers that are produced at a constant high speed after being created or processed.
  • the peripheral speed of the coil is T angentialantrieb (drive by means of drive roll which is driven at a constant speed and at the periphery of the coil abuts) obtained or by measuring and controlling the circumferential speed of the coil.
  • the traversing speed ie the double stroke rate, is constant (DIN 61 801) or is changed slightly, but in any case without a fixed relationship to the speed of the spindle. This has the consequence that in the course of the bobbin build-up (winding travel) the winding factor, ie the ratio of the spindle speed to the traversing speed, decreases hyperbolically as the bobbin diameter increases.
  • the winding factor ie the ratio of the spindle speed to the traversing speed
  • mirror affect In the area of these mirrors, the thread pieces of several successive layers of turns lie directly one above the other. This creates in particular the danger that the pieces of thread lying on top of one another will slide laterally and thereby jam each other. Therefore mirror affect considerablyei g characteris tics of the coils by lead to thread breaks or possibly unusable the coil.
  • mirrors also lead to the central and axial asymmetry of the bobbins and thus to asymmetrically distributed bobbin hardness, bobbin density and mass distribution, when using drive rollers to asymmetrical contact force, to vibrations during the winding process and to damage to sensitive thread material.
  • a mirror is created in the areas of the winding travel in which the winding factor, ie the quotient of the spindle speed and the double stroke number, is an integer.
  • the winding factor ie the quotient of the spindle speed and the double stroke number
  • the reel factor breaks around a small denominator in particular 1/2, 1/3 deviates from an integer coil factor.
  • layers with thread sections lying one on top of the other and layers with thread pieces which have been properly laid down, that is to say, are successively followed. With intermediate mirrors, the running properties of the spool are therefore less impaired; rather, the danger and damage to the coil lies in the occurrence of out-of-roundness and asymmetry of the coil.
  • Coil factors in which mirrors or intermediate mirrors occur are referred to in the following in the same way as mirror values or mirrors.
  • Higher order mirrors are those with a higher mirror value. It is known to cause a mirror disturbance by changing the double stroke rate periodically or aperiodically within predetermined narrow limits. Here, however, it is inevitable that when the coil factor approaches a mirror value, in particular an integer game. gel value, this mirror value is run through several times and with a certain dwell time. This type of mirror disturbance therefore does not eliminate the passing through of the mirror values, but merely eliminates or alleviates the symptoms of the respective mirror (cf. e.g. US Pat. No. 3,235,191 C CH-PS 416 406).
  • This invention consists improvements of this known method the goal by which the success of this ER V proceedings guaranteed to.
  • each mirror value is assigned an appropriate safety distance and each safety distance is assigned a certain jump height, jump height being understood to mean the change in the winding factor caused by changing the traversing speed.
  • the appropriate safety distance is equal to or greater than a minimum safety distance, the determination of which will be discussed later.
  • This minimum safety distance is the smallest permissible difference between the winding factor and an adjacent mirror or intermediate mirror.
  • the minimum safety distance must be observed both from the winding factor, which results from the initial value of the traversing speed, and from the winding factor, which results from the disturbance value of the traversing speed. If the winding factor reaches or approaches this minimum safety distance from a mirror value, the traversing speed is switched over and thus the winding factor changes. According to the invention, it is provided that the traversing speed is switched over in such a way that there is a sudden change in the winding factor. This change in the winding factor is so great that the changed winding factor is also outside the safety range.
  • the safety area is the area of those coil factors that does not maintain the minimum safety distance from a mirror value or an intermediate mirror value on the positive side or on the negative side. This means that the jump height of the winding factor is at least twice the minimum safety distance.
  • the method characterized in this way is based on the knowledge that the risk of the occurrence of mirror symp tomen also exists at a distance before and after each mirror value and depends on the mirror order and the jump height caused by the change in the traversing speed, ie the change in the jump height of the winding factor.
  • the predetermined safety distance be limited to the minimum safety distance. Rather, a larger safety distance can also be specified.
  • the jump height of the winding factor which is brought about by changing the traversing speed, should be equal to or greater than twice the specified safety distance.
  • S1 the safety distance of the winding factor when approaching a mirror value
  • S2 the safety distance of the winding factor after switching the traversing speed
  • the safety distance and the minimum safety distance are preferably defined as a certain fraction p of the mirror value to be avoided or the winding factor, which is the quotient of the current measurement of the spindle speed and the traversing speed (double stroke number).
  • the practical difference lies only in the structure of the electronic control required in each case, for which a person skilled in the art has suitable means available in both cases.
  • the resulting difference in the safety distance according to the calculation methods shown is very small and can be neglected in terms of textile technology.
  • the fraction p is preferably constant over several successive mirrors. However, it can also vary if experience shows that mirror symptoms, particularly in the case of low-order mirrors, can be expected relatively early before the mirror value is reached.
  • the order of magnitude p is less than 5% and generally more than 0.1%.
  • the fraction p is to be determined by experiments or - what has yet to be discussed - from the textile data of the winding process.
  • the minimum safety distance is the safety distance, which must not be undercut, in particular if the winding factor approaches a mirror value or intermediate mirror value in the course of the winding travel. In this case, the mirror risk is greater and the mirror symptoms are more serious than in the case in which the winding factor moves away from the mirror value or intermediate mirror value as the winding travel progresses.
  • the safety distance S and the minimum safety distance can - as already stated - be determined on the basis of experience.
  • the safety distance S is proportional to the mirror value and the smallest permitted thread spacing of adjacent threads of two successive turns, measured from thread center to thread center on the surface line of the bobbin, and inversely proportional to the double stroke (double stroke).
  • the mirror order but above all the thread quality is taken into account.
  • the thread deposited on the bobbin also spreads across its axis. To avoid mirror symptoms, it is therefore necessary that the adjacent threads of two successive turns keep a minimum distance from one another so that there are no mirror phenomena. This distance can be determined by Experiments are identified. He is also on the yarn quality, in particular denier, filament, filament, cohesion of the filaments by eg encryption knotun g s, Tanglen, preparation, winding tension with good accuracy to predict.
  • the double stroke rate is relatively large.
  • Low-order mirrors, in particular, are therefore particularly harmful. These mirrors may be distributed unevenly on the bobbin due to the short bobbin length, so that there is an axially and / or radially asymmetrical mass distribution of the thread on the bobbin and destruction of the bobbin at high thread speeds. This is due to the inversely proportional dependence of the security according to the invention. distance from the coil length avoided. It can be seen that the factor p shown in connection with claim 1 is the size explained here corresponds.
  • the thread spacing A can also be replaced by the width B of the thread deposited on the bobbin, measured on the surface line of the bobbin, ie taking the filing angle into account, so that the factor p is B / 2H. If the resulting minimum safety distance is undershot, there will be mirror symptoms in any case.
  • This dependency of the jump height on the safety distance and minimum safety distance is also largely responsible for avoiding mirror symptoms.
  • the change in the traversing speed and thus the winding factor occurs as quickly as possible, that is to say as quickly as possible.
  • the ratio Q can be increased. This is used in particular when the change in the traversing speed and thus the change in the winding factor takes place with initially strong and then decreasing acceleration, that is to say with a change function of the traversing speed or the winding factor with a deceleration of the first order.
  • the safety distance S can also be selected greater than the minimum safety distance S and the jump height can be made equal to the sum of the safety distance and the minimum safety distance, and this is used in particular when acceleration or deceleration of the traversing speed and thus of the winding factor initially from zero or a small value from a steady increase to a maximum, that is, with a change function of the traversing speed or the winding factor with a delay of the second or higher order, with which, for example when the changed traversing speed is transmitted via a slip clutch.
  • the disturbance value of the traversing speed is only maintained for a certain time.
  • the renewed change of the traversing speed from the disturbance value to the initial value and the change in the winding factor to be effected thereby occurs at least when the spindle speed has dropped so far that the safety distance between the avoided mirror value and the winding factor is again given, which is the quotient the spindle speed and the initial value of the traversing speed (output coil factor).
  • the traversing speed can be increased or decreased from its initial value NCA.
  • the NCS disturbance value of the traversing speed is therefore either greater or smaller than the NCA output value.
  • the output value and disturbance value are preferably kept constant over the entire winding cycle, or at least over a substantial part of the winding cycle, in particular when a plurality of winding units have the traversing drive in common.
  • the switchover can also take place beforehand, at the earliest when the spindle speed has dropped so far that the output coil factor has the specified safety distance from it Mirror level reached. If the ratio Q is greater than two and a delay of the second or higher order is to be expected when increasing the traversing speed, the switchover must be carried out beforehand when the spindle speed has dropped so far that the output coil factor has the specified minimum safety distance from the Level reached and exceeded again.
  • the winding factor is reduced.
  • the mirror value is run through quickly. According to the invention, this is achieved in the following way: If the increase in the traversing speed occurs with a delay of the first order, the safety distance is as small as possible, ie is specified as the minimum safety distance, but the ratio Q is chosen to be greater than 2. This ensures that the security area of the mirror is traversed with great acceleration.
  • a safety distance is specified which is greater than the minimum safety distance and a step increment which is essentially equal to the sum of the safety distance and the minimum safety distance. This also ensures that the safety area of the mirror is passed through with maximum acceleration.
  • the rapid passage of the Spie g same rich to the purpose required, described measures are used in particular in the particularly dangerous levels, which are smaller than the fourth
  • the increased disturbance value of the traversing speed is in any case maintained until the spindle speed has dropped so far that the output spool factor has again reached the safety distance from the mirror value. Because of the limited size of this deceleration of the traversing speed for technical reasons, the switchover can also be a little earlier, but it can also be done later.
  • the increase in the traversing speed for the purpose of mirror interference has the advantage that an impairment of the coil structure is avoided or is less to be feared.
  • the actual depositing stroke of the thread turns on the bobbin is reduced. This eliminates the risk of thread pieces slipping out of the end faces of the bobbin as a result of an excessively large stroke (stripper). This type of mirror disorder is therefore preferred.
  • the output value NCA of the traversing speed is based on the desired coil structure, in particular on the desired crossing angle determined.
  • the crossing angle when winding synthetic fiber plain yarn in spinning or stretching machines is of the order of 5 to 12 degrees, preferably 6 to 9 degrees.
  • the decisive factor here is the quality of the coil structure.
  • the traversing speed expressed as a double stroke number, then results from the specified thread speed and the specified bobbin length or stroke length.
  • the change DC of the traversing speed is then within the scope of this invention between 0.1 and 5%, preferably between 1 and 5%, of the initial value NCA of the previously determined traversing speed.
  • the change in the traversing speed is also limited by the fact that by switching the traversing speed to the disturbance value and maintaining the disturbance value, an adjacent mirror value or intermediate mirror value of harmful effects or their safety range must not be reached for a certain time.
  • the teaching of the invention presented so far deals with the avoidance of mirror symptoms in a series of mirrors and intermediate mirrors which follow one another in their order.
  • the invention is also based on the knowledge that not all mirror values are too lead to harmful mirror symptoms. This applies in particular to the higher-order mirrors that arise at the beginning of the winding cycle when the coil diameter is still small and the spindle speed therefore changes very quickly.
  • the mirror values to be disturbed are freely programmable. This makes it possible to adapt the mirror disturbance according to the invention to the respective winding process (winding speed, traversing speed, thread material, preparation and other parameters).
  • the advantage is that unnecessary changes in the traversing speed and thus also impairments in the coil structure, which are often associated with the change in the traversing speed, are avoided.
  • the invention is further based on the knowledge that the mirror symptoms also differ from mirror to mirror. It is therefore proposed as preferred that the safety distance is predetermined as a function of the mirror values to be disturbed and is preferably freely programmable. It can be particularly expedient here to make the safety distance of the intermediate mirrors smaller than the safety distance of the integer mirrors. As described, however, this measure can also be used to quickly run through the mirror values with their safety areas, which is particularly expedient for mirror values below 4.
  • the ratio Q jump height / safety distance is predetermined as a function of the mirror values to be disturbed and is preferably freely programmable. This can also ensure that the mirrors, which show particularly clear and harmful symptoms, pass through faster than other mirrors will. In the case of low-order mirrors, in particular those with mirror values less than six, it is provided that the ratio Q> 2.
  • the measures of influencing S and Q described above can be combined, specifically in such a way that the change in the traversing speed remains predetermined in the course of the winding travel.
  • the disturbance value of the traversing speed to be set can also be programmed.
  • the factor p can also change from mirror to mirror or mirror groups - e.g. Integer mirrors on the one hand and intermediate mirrors on the other hand or mirrors of high order on the one hand and mirrors smaller than 4 on the other hand - are changed.
  • mirrors which occur at the end of the winding travel are avoided by discounting the traversing speed at the end of the winding travel is reduced slowly or preferably continuously. This can be done in such a way that the winding factor remains constant if the traversing speed is reduced in the same ratio as the spindle speed. This creates a precision winding in the last turns of the winding trip.
  • the method according to the invention leads to a product that was previously not possible to produce.
  • polyamide 6.6 (nylon) smooth yarns with a titer range between 10 and 50 dtex serve as hosiery.
  • Such polyamide 6.6 yarns are spun at spinning speeds of more than 4,500 m / min and are highly pre-oriented or, after being drawn, are spun at a winding speed of more than 4,500 m / min. Because of the low titer and the desirable high discharge line of a spinning station, several threads are therefore spun simultaneously in a spinning station and wound up into a corresponding number of bobbins. The length of these bobbins is then limited for mechanical engineering reasons and is between 70 and 120 mm - depending on the number of bobbins per spinning station. The crossing angle of such coils is usually between 6.5 ° and 8.5 °.
  • the angle of deposit is not constant over the length of the coil, but in particular is partly higher at the edges and partly less than in the central region; but can also be different between outward and return strokes.
  • the angle at which the tangent arises arithmetically from the average traversing speed and the coil circumferential speed is defined here as the average depositing angle.
  • the average traversing speed in turn results from the constantly specified speed, the number of gears and the stroke of e.g. Grooved roller or reverse thread shaft of the traversing device.
  • the storage angle according to the invention is enlarged in a certain area in front of and behind the defined diameter. The range is max.
  • 3b shows a piece of thread with a large number of individual filaments in perspective.
  • the thread assumes an approximately round configuration, particularly when it is twisted, so that a diameter D can be defined.
  • the individual filaments spread out into a ribbon with a certain width B, which is measured on the surface line of the tube or spool.
  • Fig. 1 shows the cross section through a winding machine for man-made fibers.
  • the thread 1 runs at the constant speed v through the traversing thread guide 3, which is set in a reciprocating movement transverse to the running direction of the thread by the reversing thread shaft 2.
  • the traversing device includes the grooved roller 4, in the endless back and forth groove of which the thread is guided with a partial wrap. 7 with the coil and 6 with the freely rotatable winding spindle (spindle) is designated.
  • the drive roller and traverse on the one hand and the winding spindle and the spool on the other hand are relative are radially movable relative to each other, so that the center distance between the spindle 6 and the drive roller 8 can be changed as the diameter of the coil increases.
  • the reverse thread roller 2 and the grooved roller 4 are driven by a three-phase motor, for example an asynchronous motor 9.
  • the reversing thread roller 2 and the grooved roller 4 are connected to one another in a geared manner, for example by drive belts 10.
  • the drive roller 8 is driven by a synchronous motor 11 at a constant peripheral speed.
  • a motor can also be used to drive the bobbin, which drives the bobbin spindle 6 and whose speed is controlled so that the peripheral speed of the bobbin remains constant even as the bobbin diameter increases.
  • the three-phase motors 9 and 11 receive their energy from frequency converters 12 and 13.
  • the synchronous motor 11, which serves as a coil drive, is only connected to the frequency converter 12, which supplies the adjustable frequency f 2 .
  • the asynchronous motor 9 is alternately connected to the frequency converter 12 or the frequency converter 13 via a switching device 14, so that the traversing drive 9 can be operated at different speeds.
  • a computer 15 is used to actuate the switching device 14.
  • the output signal 16 of the computer 15 depends on the input.
  • a further output 20 is provided on the computer 15 for controlling the frequency transmitter 13.
  • Fig. 2 shows schematically the view of a cheese which is formed on the sleeve 21 on the winding spindle 6.
  • H is the coil length. It essentially coincides with the stroke of the thread guide 3 or the grooves 5.
  • D denotes the respective bobbin diameter.
  • Angle alpha denotes the angle of inclination or angle of deposit which is measured between the thread and the tangent to the bobbin perpendicular to the surface line.
  • Angle gamma denotes the crossing angle of the threads.
  • the characteristic of a wild winding is that the pitch angle and the crossing angle remain essentially constant and above all on average during the winding cycle. Deviations arise and are known for improving the spool structure, but are also provided in the context of this invention, in particular, at the end of the spool trip.
  • Strength in F. 3a shows the creation of a mirror, namely the second-order mirror.
  • the coil has the diameter D 1 .
  • the thread is deposited on the bobbin with the pitch angle alpha. Only a few turns are shown.
  • the view of a coil as in FIG. 2 is not shown, but rather half of a development of the circumference of the coil.
  • the pieces of thread lying on the other half, ie the back of the bobbin, are dashed.
  • the explanation begins with the thread piece 22, which is placed on the front of the bobbin. At point 23 this piece of thread disappears on the back of the bobbin, reappears the front at point 24 and reverses at one end of the coil at reversal point 25 and so on.
  • the placement angle is changed, preferably increased, in the relevant critical diameter range, as shown in dotted lines. So alpha is smaller than alpha interference.
  • 3b and 3c illustrate the geometrical appearance of a thread that is not lying on top and a thread lying on a bobbin tube or other thread layers. In the latter case, the thread is deposited with a width B, which can be calculated, for example, from the number of filaments and the filament titer, as well as other placement parameters, such as thread tension, but can be measured in a test with greater accuracy.
  • the thread center distance A is a value which changes in the course of the winding travel and which is equal to zero in the case of mirrors. For . a minimum value can be set, which is to be determined in the winding test and which ensures that no mirror symptoms of harmful effects occur.
  • a coil structure is shown in which fourth, third and second order mirror values occur. At these points a Spie done g elponent. In this example, it has also proven to be useful to also carry out a fault on the intermediate mirror 2.5.
  • the output coil factor FA approaches the integer mirror value 3 by the safety distance S according to curve 27, the oscillation speed is switched over from an output value NCA to the coil factor FA 3.1 an NCS fault value. In the case shown, the traversing speed is increased. This lowers the coil factor to the interference coil factor FS, which further decreases according to curve 28 in accordance with the decreasing spindle speed.
  • a value is now given for the safety distance S which is proportional to the mirror value and a predetermined percentage rate. This percentage is less than 5%.
  • the jump height DF ie the difference between the output coil factor 27 and the interference coil factor 28 at the moment 3.1 of the switchover from the output switching speed NCA to the interference switching speed NCS, is a multiple, preferably an integral multiple, but in any case twice the safety distance. In the case shown, it is three times the safety distance.
  • the traversing speed is reduced from the interference value NCS to the initial value NCA, whereby the step height DF of the winding factor in turn corresponds to at least twice - in the example three times - safety distance.
  • the safety distance ie the minimum distance of the winding factor from a mirror value
  • the safety distance for the coil factor FA 3.1 ie the winding factor before reaching the mirror value at the moment the traversing speed increases is greater than the safety distance with respect to the winding factor FA 3.2, ie the winding factor at the moment 3.2 of switching back to the initial value of the traversing speed. If the safety distance is always related only to the respective mirror value, there is only a slight arithmetical deviation, which is technically insignificant when winding up.
  • FIGS. 6a and 6b show that the drive frequency of a three-phase motor, which is used to drive the traversing device, is changed suddenly, possibly by superimposing a differential component (dotted).
  • a differential component dotted
  • the method that invented In accordance with the invention is used in particular when the change function of the traversing speed is abruptly steep and in any case has no delay in the first phase after the switchover.
  • the method according to the invention which is used when the change function of the traversing speed has a second or higher order delay, is explained with reference to FIG. 4b.
  • the safety distance is chosen so that it is greater than the minimum safety distance.
  • the S p rung Love DF is set large so that the winding ratio by changing the traversing speed of the whole safety area of the mirror that is, the range of FSP + S min to FSP - S passes min.
  • the jump height is therefore at least equal to the sum of the selected safety distance and the minimum safety distance.
  • the predetermined safety distance S and the jump height DF are selected so that the safety range is in any case run through in the area of greatest steepness of the changing function of the traversing speed or the changing function of the winding factor. In the case shown, DF is therefore exactly the sum of the selected and the minimum safety distance. If the change function of the traversing speed and the winding factor exhibits a greater delay when approaching the disturbance value, DF would be greater than the sum of the selected and the minimum safety distance.
  • the traversing speed is switched over again from the disturbance value to the initial value according to the principles described with reference to FIG. 4a, with either the minimum safety distance S min or the selected safety distance S being specified as the safety distance to the mirror can be.
  • FIG. 5 shows another embodiment of the embodiment of a mirror disturbance according to the invention by lowering the traversing speed.
  • the hyperbolic line 32 describes the spindle speed NS as a function of the winding travel (time).
  • Mirror values are shown as the integer multiple of the initial value of the traversing speed NCA.
  • the traversing speed as the number of double envelopes per minute is shown in line 33. It follows from the illustration that whenever the spindle speed threatens to become a multiple of the traversing speed NCA, the traversing speed is switched from the initial value NCA to the fault value NCS. The multiple corresponds to the mirror and intermediate mirror values. NCA and NCS are specified as fixed values.
  • the switching method is shown in detail with reference to FIGS. 5a, 5b and 5c, with FIG. 5b corresponding to FIG. 5 with regard to the jump height.
  • the reduced jump height according to FIG. 5a is indicated by dashed lines in FIG. 5.
  • the avoidance of the fourth-order mirror is shown in FIGS. 5a, 5b and
  • the Chan g iersprung DC thus leads in the area of the mirror to fourth order four times the fault value (4 NCS) of the traversing speed.
  • FIG. 5b shows that the quotient Q is greater than 2 and that technically there is a change function of the traversing speed with a first-order delay.
  • the traversing speed can be switched back from the NCS fault value to the initial value NCA when the spindle speed has reached the safety distance from the integer multiple - here four times - the starting value of the traversing speed (function 34).
  • the switchover can also take place at a later point in time, at the latest when the spindle speed 32 is about the Safety distance S 'approaches the integer multiple - here four times - the disturbance value of the traversing speed (function 35).
  • the switchover from the fault value to the output value can take place at any time between functions 34 and 35. Switching over to the last possible point in time, i.e.
  • Fi g . 5c shows an exemplary embodiment in which a second-order delay results for the change function for the traversing speed (FIG. 6b).
  • This switchover results in a cycle time T36 in which the winding factor or 4 times the traversing speed passes through the safety range of the mirror.
  • the mirrors to be disturbed can also be freely programmed. This is based on the knowledge that an exact prediction of the harmfulness of mirrors has not been possible until now. Rather, the impact of each individual mirror is to be determined by experiment.
  • the mass distribution of the thread on the bobbin depends very much on the safety distance that is maintained. This is due to the fact that at high spool speeds, that is to say with a small spool diameter, the mirrors on the circumference and the length of the spool occur in a strong local distribution. At low spindle speeds, ie large coil diameters and especially with short coils, it can be the case, however, that mirrors occur again and again over a considerable time at the same point on the circumference and / or length of the coil. However, these phenomena are not limited to the mirror values of the winding factor, but may also occur at intervals from the mirror values and intermediate mirror values. For this reason, the safety distance is also preferably freely programmable according to the invention, depending on the mirrors and intermediate mirrors. The factor in particular can also do this variable be programmed.
  • the safety distance (S1) of the coil factor approaching a mirror can be specified differently than the safety distance (S2) of the coil factor after the switchover, or the ratio 31 / S2 can be variable.
  • the change in the traversing speed cannot - as described previously - be carried out only by electrical devices.
  • the traversing devices of the individual winding stations can optionally be driven by two shafts rotating at different speeds via suitable clutches, freewheel gears, overrunning clutches or other gear connections, the activation or deactivation of these g Operational connections is made so that the safety distance of the winding factor of the integer or intermediate mirror values is maintained and the output value and the disturbance value of the traversing speed are set so that the change caused by the switching of the traversing speed of the winding factor according to the invention is at least twice the safety distance.
  • the traversing speed dotti there is a major change in the traversing speed dotti is possible, since the thread tension changes only relatively slightly.
  • Fig. 7 earbei- tung is shown of chemical fibers as a texturing textile machine multidigit B.
  • slot drum grooved drum or reverse thread shaft 46
  • the drive of a grooved drum 45 is shown schematically in FIG. 8:
  • the grooved drum 45 is freely rotatably mounted on the drive shaft 48. It has gears 49 and 50 on both sides, which have a slightly different size.
  • the drive shaft 48 drives the countershaft 53 with the axially displaceable coupling pieces 54 and 55 via gear 51 and gear 52.
  • the clutches can be pulled against the friction linings of the gear wheels 58, 59 by means of stationary magnets 56, 57.
  • the gear wheels 58, 59 are freely rotatable on the countershaft 53 and are in constant engagement with the gear wheels 49 and 50 of the grooved drum. By alternately actuating the clutches 56 and 57, the grooved drum can be operated at a slightly different speed.
  • the clutches are alternately activated by a computer and a program unit.
  • One of the gearbox and clutch connections e.g. gear wheels 50, 59, clutch 55 and magnet 57
  • a one-way clutch 60 directional clutch, see Dubbel, paperback for mechanical engineering, 14th edition 1981, page 414
  • the transmission link 51, 52 are replaced by an independent drive of the shaft 53rd
  • the invention has been concerned with the avoidance of mirror symptoms in that the traversing speed is temporarily changed to a disturbance value when the winding factor approaches a mirror value, and the mirror value is jumped rapidly on the way there or back.
  • the first time it is possible for the first time to produce spinning bobbins or spinning stretch bobbins with large diameters from man-made fibers with certain properties. Since mirror symptoms occur in many intermediate mirrors and since mirrors and intermediate mirrors are sometimes very close to one another, the method described so far cannot prevent mirror symptoms from occurring. This can happen, for example, if, by switching the traversing speed from the initial value to an interference value, the interference value would be in the range of an intermediate mirror.
  • This periodic or non-periodic change in the traversing speed by an average value is known per se for the purpose of mirror disturbance (cf. page 3 above).
  • the wobbling of the initial value of the traversing speed makes it unnecessary for certain mirrors or intermediate mirrors with only minor mirror symptoms to switch over to the disturbance value of the traversing speed, or the switchover can take place with a reduced safety distance.
  • the disturbance value of the traversing speed is wobbled, mirror symptoms that occur in the intermediate mirror area of the disturbance value of the traversing speed can be avoided or defused.
  • the wobble can also take place in the area of integer mirrors, in particular in the area of integer mirrors of higher order. However, it can preferably be used in the area of intermediate mirrors and in particular intermediate mirrors of a lower order.
  • the combination of the mirror disturbance according to the invention by skipping mirror values and by changes in the initial value and / or changes in the starting value and / or the disturbance value of the traversing speed between error values makes it possible for the first time to achieve fault-free coils, which can be determined by their volume, on the one hand, Large ratio of diameter to stroke, due to faultless yarn quality, especially uniformity and uniform dyeability, excellent run-off properties even when the thread is pulled off the bobbin at high take-off speeds of, for example, more than 1,000 m / min, thread take-off without thread breakage and without thread tension fluctuations and are also suitable for threads with unfavorable winding properties such as hosiery yarn or threads with a low single capillary denier.
  • the safety distance of the winding factor from the mirror values is measured from the mean value of the winding factor, which results from the mean wobbled traversing speed (initial value or disturbance value).
  • This mean safety distance is determined according to the regulations of this invention. It is preferably greater than the amplitude of the winding factor, which results from the wobble of the traversing speed. This means that the extreme values of the winding ratio, which result from the wobbling of the traversing speed, not intended to reach p iegel in a mirror or mots. It is even provided and preferred that the extreme values of the winding factor also maintain a safety distance, which, however, can be set relatively small, since the extreme values of this winding factor are only passed through for a short time.
  • the E xtrem the winding ratio but should comply with the minimum safety distance according to this invention
  • the safety distance according to this invention should therefore in any case be greater than the amplitude of the coil factor in the mirror region, this amplitude being calculated according to the formula: F xa / 1 + a or - which is approximately the same - FSP xa / 1 + a.
  • the extreme values of the wobble preferably maintain a minimum safety distance.
  • the safety distance is greater than the sum of the minimum safety distance FSP xp min plus the amplitude of the coil factor in the mirror area, the minimum distance of the extreme values of the coil factor from mirror values being designated as Z and preferably being equal to FSP x B / 2H.
  • the wobble may also offer Perceptible possibility to approach the mirror values even more with the extreme values of the winding factor.
  • the average value of the traversing speed which is decisive for the determination of the switchover times, is also determined by measurement and also by integration of the continuously measured wobble values, even when the wobble is superimposed.
  • the wobble can vary in duration and its relative amplitude mirror dependent be specified and programmed.
  • the relative amplitude is preferably identical for the initial value NCA and the disturbance value NCS of the traversing speed.
  • the breathing movement of the traversing device and the wobble movements can be coordinated with one another in a known manner with additionally superimposed breathing (stroke reduction) in such a way that the resulting thread speed remains essentially constant.
  • Figures 9 and 10 choose a representation that corresponds to that of FIG. 5.
  • the method is explained using the fourth-order mirror.
  • a fourth-order mirror is created when the four-fold mean value of the initial value of the traversing speed is equal to the spindle speed.
  • the switchover to the disturbance value of the oscillation speed takes place when the mean value of the output value NCA reaches the safety distance S 'from the spindle speed.
  • S ' is so large that there is still a minimum safety distance Z' between the extreme values of four times the traversing speed and the spindle speed.
  • Z ' is therefore preferably equal to the minimum safety distance S' min in the sense of this invention.
  • the switching time and wobble should be coordinated with one another in such a way that the direction of change in the traversing speed always coincides with the direction of wobble, as is shown in FIGS. 9 and 10 . Since in Fi g . 9 When the initial value of the traversing speed approaches the spindle speed, the traversing speed is increased to the disturbance value, the switchover also takes place in the phase of the wobble in which the traversing speed is increased. This applies in particular if the change in the traversing speed traverses a mirror region, as in the case of switching from the initial value to the fault value in FIG. 9 and when switching back from the fault value to the output value in FIG. 10.
  • the superimposition of the mirror interference method according to the invention requires a modification of the system shown in FIG. 1. 11, an integrator 61 is additionally used, by means of which the continuous measured values of the traversing speed, which are recorded by the sensor 17, are integrated into an average value. An additional frequency converter 62 is also required.
  • the frequency converters 13 and 62 deliver the drive frequencies for the output value or the disturbance value of the traversing speed.
  • the frequency generator 12 is only responsible for driving the drive roller 8.
  • the frequency transmitters 13 and 62 are controlled by a wobble device 63, by means of which a wobble frequency is superimposed on the mean setpoint frequency for the output value and disturbance value of the traversing speed.
  • the wobble generator 63 can be controlled by the program unit 19 via a computer 15.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
EP83102811A 1982-05-03 1983-03-22 Procédé pour éviter des rubans d'ordre entier ou fractionnaire en bobinage croisé au hasard d'un fil Expired EP0093258B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3216334 1982-05-03
DE3216334 1982-05-03
DE3217562 1982-05-11
DE3217562 1982-05-11
DE19823219880 DE3219880A1 (de) 1982-05-27 1982-05-27 Verfahren zur spiegelstoerung beim aufwickeln eines fadens in wilder wicklung
DE3219880 1982-05-27

Publications (3)

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EP0093258A2 true EP0093258A2 (fr) 1983-11-09
EP0093258A3 EP0093258A3 (en) 1984-07-18
EP0093258B1 EP0093258B1 (fr) 1986-12-10

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EP83102811A Expired EP0093258B1 (fr) 1982-05-03 1983-03-22 Procédé pour éviter des rubans d'ordre entier ou fractionnaire en bobinage croisé au hasard d'un fil

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EP (1) EP0093258B1 (fr)
DE (1) DE3368253D1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195325A2 (fr) * 1985-03-11 1986-09-24 B a r m a g AG Procédé de bobinage
EP0248406A2 (fr) * 1986-06-03 1987-12-09 TEIJIN SEIKI CO. Ltd. Appareil de va-et-vient pour fil
DE3627879A1 (de) * 1986-08-16 1988-02-25 Barmag Barmer Maschf Verfahren zum aufwickeln von faeden
EP0486896A1 (fr) * 1990-11-23 1992-05-27 NEUMAG - Neumünstersche Maschinen- und Anlagenbau GmbH Procédé pour enrouler un fil en enroulement de precision etage
DE4223271C1 (fr) * 1992-07-17 1993-06-24 Neumag - Neumuenstersche Maschinen- Und Anlagenbau Gmbh, 2350 Neumuenster, De
DE19607905A1 (de) * 1996-03-01 1997-09-04 Schlafhorst & Co W Verfahren und Vorrichtung zum Herstellen von Kreuzspulen in wilder Wicklung
EP1506933A1 (fr) 2003-08-13 2005-02-16 Murata Kikai Kabushiki Kaisha Procédé et dispositif pour éviter l'enroulage en rubans
EP2143680A1 (fr) * 2008-07-10 2010-01-13 Oerlikon Textile GmbH & Co. KG Procédé et dispositif de perturbation d'image lors de l'enroulement d'un fil
CN114555498A (zh) * 2019-10-29 2022-05-27 宇部爱科喜模株式会社 纱线卷装体及其制造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH416406A (fr) * 1963-08-29 1966-06-30 Monsanto Co Procédé de bobinage de fil
DE1510532A1 (de) * 1964-04-04 1972-08-10 British Nylon Spinners Ltd Verfahren und Vorrichtung zum Aufwickeln von Garnen
DE2914924A1 (de) * 1979-04-12 1980-10-30 Barmag Barmer Maschf Aufspuleinrichtung
JPS56122766A (en) * 1980-03-03 1981-09-26 Murata Mach Ltd Ribbon winding preventive device in winding machine
EP0027173B1 (fr) * 1979-09-18 1984-07-18 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Procédé pour bobiner du fil

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
CH416406A (fr) * 1963-08-29 1966-06-30 Monsanto Co Procédé de bobinage de fil
DE1510532A1 (de) * 1964-04-04 1972-08-10 British Nylon Spinners Ltd Verfahren und Vorrichtung zum Aufwickeln von Garnen
DE2914924A1 (de) * 1979-04-12 1980-10-30 Barmag Barmer Maschf Aufspuleinrichtung
EP0027173B1 (fr) * 1979-09-18 1984-07-18 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Procédé pour bobiner du fil
JPS56122766A (en) * 1980-03-03 1981-09-26 Murata Mach Ltd Ribbon winding preventive device in winding machine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ARTOBOLEVSKI "Les mécanismes dans la technique moderne". Tome 2, page 588 (Editions MIR, Boscon.) *
Patent Abstracts of Japan Band 5, Nr. 206, 26. Dezember 1981 & JP-A-56-122766 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195325A2 (fr) * 1985-03-11 1986-09-24 B a r m a g AG Procédé de bobinage
EP0195325A3 (en) * 1985-03-11 1987-04-08 B A R M A G Ag Winding method
EP0248406A2 (fr) * 1986-06-03 1987-12-09 TEIJIN SEIKI CO. Ltd. Appareil de va-et-vient pour fil
EP0248406A3 (en) * 1986-06-03 1988-11-02 Teijin Seiki Company Limited Yarn traverse apparatus
DE3627879A1 (de) * 1986-08-16 1988-02-25 Barmag Barmer Maschf Verfahren zum aufwickeln von faeden
EP0486896A1 (fr) * 1990-11-23 1992-05-27 NEUMAG - Neumünstersche Maschinen- und Anlagenbau GmbH Procédé pour enrouler un fil en enroulement de precision etage
DE4223271C1 (fr) * 1992-07-17 1993-06-24 Neumag - Neumuenstersche Maschinen- Und Anlagenbau Gmbh, 2350 Neumuenster, De
EP0578966A1 (fr) * 1992-07-17 1994-01-19 NEUMAG - Neumünstersche Maschinen- und Anlagenbau GmbH Procédé pour enrouler un fil par bobinage de précision étagé
US5447277A (en) * 1992-07-17 1995-09-05 Neumag-Neumuensterische Maschinen Und Anlagenbau Gmbh Method of winding yarn on a bobbin or the like in a stepwise high precision winding process
DE19607905A1 (de) * 1996-03-01 1997-09-04 Schlafhorst & Co W Verfahren und Vorrichtung zum Herstellen von Kreuzspulen in wilder Wicklung
US5857638A (en) * 1996-03-01 1999-01-12 W. Schlafhorst Ag & Co. Method and device for preparing randomly cross-wound yarn packages
EP1506933A1 (fr) 2003-08-13 2005-02-16 Murata Kikai Kabushiki Kaisha Procédé et dispositif pour éviter l'enroulage en rubans
EP2143680A1 (fr) * 2008-07-10 2010-01-13 Oerlikon Textile GmbH & Co. KG Procédé et dispositif de perturbation d'image lors de l'enroulement d'un fil
CN101624151B (zh) * 2008-07-10 2012-08-08 欧瑞康纺织有限及两合公司 在卷绕纱线时的防叠绕方法和装置
CN114555498A (zh) * 2019-10-29 2022-05-27 宇部爱科喜模株式会社 纱线卷装体及其制造方法

Also Published As

Publication number Publication date
EP0093258A3 (en) 1984-07-18
DE3368253D1 (en) 1987-01-22
EP0093258B1 (fr) 1986-12-10

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