EP0235557A2 - Method to take up a thread onto a cross-wound bobbin - Google Patents

Abstract

When winding a thread into a package, the traversing stroke (breathing) is shortened and lengthened in alternating cycles. Breathing takes place according to a wave-shaped time diagram, so that the thread is laid in the reverse area to form a cylindrical winding. This cylindrical winding has a slightly larger diameter than the rest of the coil. It is possible to keep breathing in sync with the mirror disorder.

Description

The invention relates to a method for producing a cylindrical cheese in a wild winding from a thread, in particular from a textured, in particular false-twisted, textured thread. The end faces of such cylindrical cross-wound bobbins can lie in a normal plane (winding with straight end faces) or can be erased relative to this normal plane (biconical winding).

In this application, a cross-wound bobbin is referred to as a bobbin in a wild winding, the winding ratio of which is constant or variable in the course of the winding travel. "Spool ratio" refers to the ratio of the spool speed NS (revolutions of the spool per minute) to the traversing speed DH (number of double strokes per minute).

Coils of the type defined at the outset are described in DIN 61800. They are manufactured on cross winding devices of texturing machines. Because of their treatment, in particular false twist texturing treatment, the threads have curl-elastic properties there.

The current technical development is aimed at larger spools and at increasing the running speed in the further processing machines.
In order to avoid the beads on the coil ends, it is known to modify the traversing stroke by breathing, ie periodically shortening and lengthening in the end region of these beads.

It is also known that a mirror disturbance should occur in the production of packages. The appearance of the bobbin is referred to as a mirror, in which, in successive winding layers of the thread, pieces of thread aligned in the same direction lie more or less precisely on one another. The symptoms of such mirrors are usually avoided by constantly reducing and increasing the traversing speed, which is specified as the number of back and forth movements (double strokes) of the traversing thread guide per unit of time, between an upper and lower limit.

It is also known that the tensile force with which the thread has been wound onto the bobbin is a special criterion for good running properties. It depends in particular on the uniformity of this tensile force over the thread length and over the length of the bobbin. In order to ensure a uniform thread tension, it is also known that breathing and mirror disturbance take place synchronously in such a way that changes in the traversing speed which result from changes in the thread guide stroke are compensated for by the changes for the purpose of mirror disturbance.

In systematic investigations of the running behavior of bobbins, it was surprisingly found that flattening the cylindrical outer surface area of the package on the side facing away from the take-off side of the thread brings about a substantial improvement in the running properties of the thread. In contrast, bead-shaped thickening of the bobbin on the thread take-off side, in particular due to the inevitable depositing of an excessive amount of thread in the area of the reversal of stroke, had no disadvantageous consequences. This result was completely unexpected, because, based on the known experience with the running behavior of the threads of tapered bobbins, the opposite result had been expected.

It should be mentioned that the flattening of the cylindrical outer surface area of the package is not an inclined end face, as is obtained in the production of a biconical package by a uniform reduction in the thread guide stroke, but a deliberately brought about, in particular constant, reduction in diameter at least the end of the cylindrical winding area, which is opposite the thread take-off side. In the case of bobbins which have a thread reserve winding for connecting the beginning of the thread of a bobbin to the end of the thread of a following bobbin, the flattening lies on the side of the bobbin on which the thread reserve lies.

The thread take-off side of a bobbin is further defined in that the bobbin tubes have a rounded edge on their end face facing the thread take-off side.

The manufacture of such bobbins can be accomplished primarily by the fact that the length of the breathing strokes is significantly increased in cross-winding devices, the traversing devices of which, in addition to the possibility of image interference to improve the edge structure, have devices for cyclically shortening and lengthening the thread guide stroke (breathing) 20 mm stroke reduction on one or both stroke ends with a basic stroke of the traversing thread guide of 250 mm.

Coils created in this way, however, had relatively soft faces. Depending on the type of further processing, this is undesirable since soft coils are more easily damaged than hard coils. Thus, the spools with flattened ends turned out to be unfavorable in many cases, particularly because of the transport and handling problems that arise, despite their favorable running properties.

The EP application 85 109799.8 was able to maintain the advantages of the coils with flattened ends and, at the same time, to avoid excessive softness of the coil ends and to produce a coil with the desired, adjustable hardness with excellent running properties. The EP application 85 109799.8 is based on the method known from EP-PS 27 173 = US-PS 4,325,517, in which the breathing stroke as the difference between the maximum and the smallest stroke length is continuously changed from one breathing cycle to the other in synchronization with the mirror disturbance (Bag. 1157). This process has brought about a substantial homogenization of the spool structure and improvement of the run-off properties.

By claim 1, the object is achieved to produce bobbins with a large diameter and long bobbin length, which at high take-off speeds of 1000 m / min and more ensure a trouble-free drainage of the thread overhead, which also have a stable cylindrical shape and with a uniform, of the traverse movement and the mirror disturbance independent thread tension.

The measures according to the invention can be applied to cylindrical cross-wound bobbins with straight end faces and those with sloping end faces in longitudinal section (biconical bobbins).

The method according to this invention is characterized in that at most two breaths of different sizes, but preferably only breaths of the same size are carried out in constant alternation. The breathing curve between the inner end points and the outer end points of the traversing stroke follows a wave course with valleys similar to parabolas, the apex of the breathing curve lying on the outer end point of the traversing stroke and there the slope is zero. The reversal of the breathing curves in the inner end points is essentially discontinuous, in that the parabolic branches of the breathing curve with a decreasing traversing stroke and the branches of the breathing curve with an increasing traversing stroke merge into one another in the respective inner end point of the traversing stroke.

In the context of this application, the time law of movement of the end point of the traversing stroke with the shortening of the traversing stroke (breathing stroke) is referred to as the ordinate and the time as the abscissa under the respiration curve. The breathing stroke is the temporary shortening of the traversing stroke at one end of the coil compared to the basic traversing stroke, so that when breathing at both ends of the coil the equations apply:
2 × maximum breathing stroke = (traversing stroke between the outer end points)
- (traverse stroke between the inner end points)
2 × maximum breathing stroke = maximum traversing stroke - minimum traversing stroke and
2 × breathing stroke = maximum traverse stroke - current traverse stroke.

The traversing point between the outer end points is referred to as the basic traversing stroke. To produce a biconical coil, the basic traverse stroke is also constantly reduced compared to the initial traverse stroke. The initial traverse stroke is the largest traverse stroke of the winding travel. It is moved at the beginning of the winding cycle and determines the length of the bobbin.

The respiration curve thus has a parabolic-like course in the respiratory stroke-time diagram and this course is determined in such a way that the amount of thread deposited in the reversal area of the traversing is evenly distributed over the reversal area. A - theoretically - slightly thickened coil end is thus created at the coil ends at which breathing is carried out, which, however, is not - as before - in the form of an annular bead, but is exactly cylindrical.

In the following, the invention is explained on the basis of exemplary embodiments and on the basis of devices with which the invention can be carried out.

Fig. 7 shows a device for winding a thread on a bobbin according to the inventive method. In this figure, reference is made to US Pat. No. 3,730,448, which essentially corresponds to FIG. 3 of German patent 19 16 580. To the reference numerals in FIG. 3 of US Pat. No. 3,730,448, 100 were added to identify identical parts in FIG. 7 of this invention.

Short description:

7, a coil 102 is formed on the coil sleeve 101. The spool is driven by friction roller 105 on shaft 106. The shaft is driven by motor 50 via a frequency converter 51. The traversing device 107 consists of a thread guide 108 with an angle lever 109, which is rotatably mounted on pins 110. The pin 110 is fastened to a slide 111 which is driven by the sliding shoe 113. The sliding block 113 moves in a helical or spiral groove 114 on the cam drum 115. The sliding block 117 is guided in the guide rail 118 and is rotatably mounted on the pin 116 at the other end of the angle lever 109. The guide rail 118 is rotatably mounted in the pivot point 120. The traversing stroke of the thread guide 108 depends on the inclined position of the guide rail 118.

Cam head 135, which is fastened to rod 126, is used to adjust the inclined position of guide rail 118. Rod 126 is associated with a series of winder units arranged side by side and has a central drive which will be described below. The working surface 136 of the cam head 135 acts on the guide rail 118 via transmission cams 128 and transmission link 129 and thus determines the inclined position of the guide rail 118 and consequently the length of the traversing stroke. With the help of the transmission link 129 coils 102 with biconical ends are produced by shortening the traversing stroke depending on the increasing diameter of the coil 102. In this connection, reference is made to the description of the aforementioned U.S. Patent 3,730,448. To produce spools with straight edges, the guide rail 118 is moved to the left and locked (this will be discussed later), so that the cam head 123 is operatively connected to the shoulder 138 on the guide rail 118 via its working surface 137. In this position, the transmission link 129 is out of operation due to the greater inclination of the guide rail 118.

In addition to what is shown in FIG. 3 of US Pat. No. 3,730,448, devices for driving and adjusting the rail 126 are shown in the left part of FIG. 5 of this description. These devices (shown schematically) consist of a program unit 18, a signal / current converter 19, an electromagnet 20, the magnetic force of which is transmitted to a hydraulic control valve 21, a spring 22 and to the piston of the cylinder-piston unit 23. The piston rod 24 is connected to the end of the adjusting rod 126. The group consisting of magnet 20, control valve 21, spring 22 and cylinder-piston unit 23 is arranged on slide 25. This group is shown in detail as unit 26 in FIG. 6.

The unit 26 comprises the electromagnet 20, the hydraulic control valve 21, the spring 22 and the cylinder-piston unit 23. The iron core 27 of the magnet 20 acts on the piston rod 28 of the control valve 21. The piston rod 28 has three control collars 29, 30, 31 , which serve to control the connecting lines between the pump 32, tank 33 and the rear 34 of the cylinder-piston unit 23. The spring 22 acts via a corresponding spring plate 35 on the other side of the piston rod 28. The other end of the spring 22 acts on the spring plate 36 and the piston 37 of the cylinder-piston unit 23. The piston 37 is a difference tialkolben, since its end face 38 is reduced by the area of the piston rod 24. The end face 38 of the piston 37 is permanently connected to the pump 32 via channel 39. The rear 34 of the piston 37 is connected both to the pump 32 via channel 40 and to the tank 33 via channel 41. This connection is controlled by moving the control collar 30, which connects the channel 41 to both channel 40 and channel 42.

One arm 43 of the channel 42 leads to the rear 34 of the cylinder-piston unit 23. The other arm 44 serves to compensate for the pressure that prevails on both sides of the hydraulic control valve. It should be noted that piston 37 abuts a shoulder 45 of the cylinder in its outer, left position. As a result, the outermost stroke ends of the coil are mechanically fixed.

In Fig. 6 it can also be seen that the unit 26 is mounted on a carriage 25. The carriage is attached to two parallel rods 49, which are slidably mounted in slide bearings 46. The carriage 25 is displaceable between two positions, one position being limited by a stop 47 and the other position by a stop from flange 48 to slide bearing 46.

In operation, one of the winding programs shown in the previous drawings and diagrams is stored in the program unit 18. The program unit generates an output signal which corresponds to a certain traverse stroke length in accordance with one of the traverse programs according to this invention. This output signal is converted by the converter 19 into an electrical current, which activates the magnet 20. The magnetic force is transmitted to the piston rod 28 of the control valve 21, to the spring 22 and to the piston 38 and piston rod 24.

The function of the unit 26 will be described with reference to the position of the control valve 21 shown in FIG. 6.

A specific output signal is converted into a current which exerts a force on the iron core 27, which then pushes the piston rod 28 with the control collar 30 into the position shown. In this position, channel 42 is closed. Consequently, the end face of the cylinder-piston unit 23 is acted upon by the liquid flow coming from the pump 32. The back 34 is closed. As a result, piston 37 and piston rod 24 are locked in the position shown.

If the output signal of the program unit is changed in such a way that a stronger current acts on the electromagnet 20, a stronger force in turn acts on the iron core 27, which moves the iron core 27 to the right. Channel 42 then opens to channel 41, which leads to tank 33. A pressure drop now arises on the rear side 34 of the cylinder-piston unit 23, and the pump pressure acting on the front side 38 displaces the piston 37 and the piston rod 24 to the left. As a result, the spring 22 is compressed, and the resulting spring force causes the piston rod 28 of the control valve 21 to be displaced to the left, whereupon the control collar 30 interrupts the connection of the channel 42 to the channel 41 and thus to the tank. Thus, the force of the iron core 27 is balanced by the spring 22. Conversely, when the current is decreased, the spring 20 moves the piston rod 28 to the left, and collar 30 opens the channel 42 to the arm 40 leading to the pump. The pump pressure is now applied to both sides of the piston 37. Because the active area on the rear 34 is larger than the active area on the front 38, piston 37 is moved to the right. As a result, the spring 22 expands and the spring force acting on the piston rod 28 decreases. Due to the magnetic force acting on the iron core 27, the piston rod 28 is now moved to the right, so that collar 30 closes the connection between channel 42 and pump channel 40.

From this description it can be seen that the input current acting on the electromagnet 20 causes a certain position of the piston 37, the piston rod 24 and consequently the rod 126 and thus the inclination of the guide rail 118. The traversing stroke length of the thread guide 108 shown in FIG. 7 is thus controlled by the output signal of the program unit 18.

As already mentioned, unit 26 is mounted on slide 25. In the position shown, in which the flange 48 bears against the stop 37, the unit 26 and the rod 126 are positioned such that the inclined position of the guide rail 118 via the cam head 135 on the rod 125 is now determined. If the slide 25 and the unit 26 are in this position, biconical coils 102 are produced. If the slide is in the other position, in which the flange 48 bears against the slide bearing 46, the cam head 123 of the rod 126 is in operative connection with the shoulder 138 on the guide rail 118, as a result of which coils 102 with flattened end regions are formed.

FIG. 7 also shows that shaft 106 on friction roller 105 is driven by motor 50. Motor 50 is controlled by the output signal of frequency converter 51. The cam drum 115 is driven by motor 52. Motor 52 is controlled by the program unit 53, whereby the traversing speed is changed to prevent unwanted mirrors on the formed roll. The frequency converter 51 is controlled on the one hand by the output signal of the program unit 18, by which the breathing is influenced according to this invention, and on the other hand by the output signal of the program unit 53, by which the traversing speed is changed. This can cause changes in the tension of the thread to be wound on the bobbin 102, either due to breathing and / or the changes tion of the traversing speed are caused by small changes in the peripheral speed of the friction roller 105 and the spool 102. Timer 54 coordinates the output signals of the program units 18 and 53, via which the breathing and the change in the traversing speed are controlled according to this invention and in particular according to the diagrams shown.

The breathing methods that have become known so far now use breathing laws with a zigzag-shaped but rectilinear course. In contrast, a breathing law with a parabolic shape is provided according to this invention, as shown in Fig. 4. The time on the abscissa of the diagram shown there is shown on the ordinate, the end region of the traversing stroke H or the breathing stroke A. The curves shown represent the end points at which the traversing thread guide 108 (FIG. 7) indicates the course of the winding travel over time reverses a coil end. The time-distance diagram of the traversing thread guide 108 is shown in a temporal partial area of the diagram according to FIG. 4, the representation on the time axis being able to be represented only in a distorted form, since the traversing speed is actually faster. The course of this time-path diagram is designated by 8. It can be seen from this time-path diagram 8 that the end points E, at which the traversing thread guide reverses, continuously move a parabolic arc between the vertex Ea (outer end point) and the inner end point Ei in the course of a cycle time.

The end points E are identical to the apex of the respective traverse stroke. The parabolic arch is referred to in this application as the "breathing curve".

The distance A = Ea - Ei is referred to in this application as "maximum breathing stroke" and is 25 mm when breathing is carried out.

The cycle time of an implemented breathing law was 6 seconds.

It can be seen from the diagram shown in FIG. 4 that the respiration curve at the apex Ea has a slope of zero and that the branches of the respiration curve enter the inner end points Ei at a rather acute angle. This corresponds to the ideal course. This ideal course can only be selected if the mechanics shown in Fig. 7, i.e. in particular the drive of the guide rail 118, which can represent the required rapid reversal of movement. If this is not the case, the method according to the invention is used, which is described below with reference to FIGS. 8 to 13.

It should be noted that in the time-path diagram of the breathing stroke shown in FIG. 4, the descending to the ascending branches of the breathing curve at the apex Ea are mirror-symmetrical. As will become apparent from the further description below, this is expedient, but also not necessary if the breathing stroke of the successive breathing cycles remains constant.

Regarding the exemplary embodiment according to FIGS. 4, 5:
Before the exact course of the breathing curve 1 is described, reference should first be made to the synchronization between breathing curve 1 and disturbance curve 2. The interference curve 2 is shown in FIG. 5, with the same abscissa as the time axis and with the traversing speed DH as the ordinate. The traversing speed is given as the double stroke rate DH. The double stroke number is the number per unit time of the back and forth movements of the traversing thread guide 108 (FIG. 7). The traversing thread guide 108 is operated with a certain average double stroke rate DHM. This average number of double strokes is related to the surface speed of the coil through the Drive roller 105 is given, and determines the angle at which the thread is placed on the bobbin. The traversing speed is now continuously varied between an upper limit value DHO and a lower limit value DHU, for example according to the linear sawtooth-shaped fault law shown. The breathing law 1 and the disturbance law 2 are synchronized in such a way that the lowest traversing speed DHU always coincides with the largest traversing stroke in the peak value Ea of the breathing curve and the highest traversing speed DHO with the smallest traversing stroke in the inner end point of the breathing curve. This ensures that the change in the linear traversing speed, which is caused by breathing, is compensated for by an opposite course of the perturbation and the thread tension is thereby kept constant or is very evenly leveled. It should be noted that the average traversing speed preferably remains constant in the course of the winding travel, but can also be increased or decreased slightly to influence the storage angle during the winding travel.

And now to determine the course of the breathing curve:
It is already apparent from FIG. 7 that the groove 114 on the cam drum 115 reverses with a certain curvature at the end points of the traversing stroke. This course of the groove is shown as the law of motion 3 of the traversing (traversing curve) in FIG. 1 as line 4, 6. Line 4, 6 in FIG. 1 thus represents a development of the cam drum 115. It can be seen from FIG. 1 that the straight branch 4 of the traversing curve merges into a curved curve 6 at a point 5 before and after the stroke reversal. The axial distance between points 5 and the apex - outer end point Ea of the traversing stroke is referred to as the outer reversal area Ba.

When determining the reversal area BA, it must also be taken into account that the placement of the thread on the bobbin is not only based on the traversing law, which is predetermined by the shape of the cam drum 115. Rather, it must also be taken into account that the thread is under tension when it is deposited on the bobbin and therefore does not deposit according to the traversing law specified by the cam drum. The thread therefore tends to form an arc with the smallest possible curvature in the reversal area. The size of the curvature depends on the thread tension on the one hand, but on the other hand also on different thread parameters, in particular the friction of the thread on the deposited thread layers. The quality of the bobbin therefore depends not only on the traversing law of the cam drum 115, but even more on the actual placement of the thread on the bobbin. Therefore, the reversal area BA is preferably measured on a bobbin as the axial distance between the end of the traversing stroke predetermined by the cam drum and the normal plane of the bobbin, in which the curved reversal area of the thread actually deposited on the bobbin merges with the area of the linearly deposited thread.

The course of this curve 6 can be parabolic. However, other curve profiles, for example sinusoidal, are also conceivable. It is essential that the traversing thread guide with carriage 111 and all the parts attached to it (FIG. 7) pass through the reversing area Ba with the least possible deceleration and acceleration as well as without jerks and bumps. This means that the outer end point Ea of the traversing stroke is offset by a certain amount axially towards the center of the coil compared to the theoretical end point Eth, in which the straight branches 4 of the traversing groove would meet at an angle.

In Fig. 1 it is further shown that by swiveling the guide rail 118, the traversing curve of the traversing thread guide 108 is moved back and forth from the end region to the center of the bobbin (breathing). In Fig. 1, the axially outermost traversing curve with the curve pieces 4 and 6 and the axially innermost traversing curve 9 (dash-two-dotted) and in between three arbitrarily picked traversing curves 10 (dashed), 11 (dash-dotted), 12 (dotted) are shown . These curves 10, 11, 12 are traversed in arbitrarily selected fractions of the cycle time of a breathing stroke, once in both directions of breathing.

The distance between the apex Ea of the axially outermost traversing curve and its transition point 5, at which the straight curve curve 4 merges into the curved curve curve 6, is referred to in the context of this application as the reversal region Ba. It now appears from Fig. 1 that the breath A, i.e. the axial distance between the outer end point Ea and the inner end point Ei of the traverse stroke essentially corresponds to the reversal area Ba and is at least the same size.

According to the invention, the breathing stroke A is preferably greater than the reversal area Ba. The reversal area B is the axial length of the bobbin, on which the thread does not lie at a constant angle of deposit. This area must be determined from case to case by measurement. The outer reversal area Ba is the reversal area that the thread has with the greatest traversing stroke. The turning range depends, as will be explained, on the one hand on the traversing law, according to which the direction of movement of the thread at the ends of the traversing stroke is reversed with finite deceleration and acceleration, but also on the thread pulling force and friction with which the thread on the Coil is deposited.

When the traversing thread guide 108 moves on the axially outermost traversing curve with the curve pieces 4, 6, an equal amount of thread is deposited on the straight pieces 6, on which there is a constant traversing speed, on each unit of the bobbin length. This creates a cylindrical layer of thread. On the curved curve pieces 6, however, the traversing speed initially decreases to zero in the outer vertex Ea of the traversing curve and then increases again to the constant value described above. Since a larger amount of thread is deposited on each unit of the bobbin length at a low traversing speed than at a high traversing speed, a very large amount of thread is deposited in the area of the outer vertex Ea.

The thickness of the thread layer, which is deposited in the reversal region Ba, is therefore greatest at the apex of the traversing stroke and decreases from there to the layer thickness deposited by the rectilinear traversing curve 6.

The diagram of Fig. 2 shows the length L of the bobbin on the abscissa, starting from the outer vertex Ea and the thickness of the thread layer on the ordinate, e.g. measured in millimeters, which is stored on the spool per unit of time. The curve 6.2 shows the course of the thread layer thickness when the traversing thread guide maintains the traversing curve after the curves 4, 6 in FIG. 1.

With breathing, as can be seen from FIG. 1, the traversing curves are shifted in parallel. The reversal area Ba is thus also moved axially towards the center of the coil. It follows from this that each of the instantaneous traversing curves 9, 10, 11, 12 shown in FIG. 1 leads to an assigned, stored layer thickness profile 9.2, 10.2, 11.2, 12.2.

In FIG. 2 and its enlargement in FIG. 2A, these layers generated per unit of time are recorded side by side.

3 shows the summation of the layers. The essence of the invention results from this summation:

FIGS. 1 to 3 are simplified insofar as only four further individual traversing curve profiles of the traversing thread guide or the layers generated with these traversing curve profiles are shown during a breathing stroke. In reality, all traversing curves that lie between the traversing curves 4, 6 and 9 shown are traversed.

The step-by-step approach chosen, however, makes the principle of the invention clearer: on the one hand, the maximum breathing stroke essentially corresponds to the axial length of the reversal area. On the other hand, the breathing curve according to FIG. 4 is calculated so that the sum of the layer thicknesses formed is constant in the entire breathing stroke A _max and results in a cylindrical coil surface OB. 3 shows the layer 6.3 which is generated at the apex of the breathing stroke by the traversing curve 4, 6 (FIG. 1). By specifying the time in which this traversing curve is traversed, ie by specifying the slope dA / dT of the breathing curve (FIG. 4) at the apex Ea, the layer thickness of layer 6.3 is determined so that the maximum located at the end of the coil is the one desired in the deflection area , increased diameter D of the coil results. This applies to the gradual observation. In reality, ie in the case of a constant breathing curve, this specification results from the curvature of the breathing curve at the apex.

The layer 10.3 which is wound onto the layer 6.3 may only become so large that its maximum with the layer 6.3 below it again reaches the desired diameter of the end region Ba. Layer 10.3 is generated by traversing curve 10. Traversing curve 10 is approached for a certain period of time while the traversing stroke is reduced (outward breathing) and for a certain period of time while the traversing stroke increases (return path of breathing). The duration of the outward and return journey of breathing can preferably be the same. In this case, the respiratory curve is mirror-symmetrical to the traversing axis at its apex. The duration of the outward and return journey of breathing can also be unequal. The result is an asymmetrical breathing curve. In any case, the total period of time which is observed for the traversing curve 10 is predetermined by the maximum diameter D of the thread layers previously wound.

As I said: These explanations apply to the simplified, step-by-step view. When driving through a steady breathing curve, this time period corresponds to a specific slope and curvature of the breathing curve to be specified at the point of the breathing stroke at which the traversing curve 10 is driven. Just like the length of time, the slope or curvature for the outward and return path of breathing can be different.

Back to the gradual examination:
In the next breathing stage, layer 11.3 is wound onto layers 6.3 and 10.3 by setting the traversing curve 11 (FIG. 1). This traversing curve 11 in turn creates a layer with a maximum thickness. By specifying the times during which the traversing curve 11 is maintained on the outward and return path of breathing, the maximum of the layer 11.3 is determined so that it is together with the layers 6.3 and 10.3 below give the predetermined diameter D of the layers wrapped in the previous stages of the breathing stroke.

The same now applies to the traversing curve 12 and the layer 12.3 thus generated as well as the traversing curve 9 and the layer 9.3 thus generated.

The inner end of the breathing stroke is reached and the breathing movement goes backwards again. As mentioned, the traversing curves 12, 11, 10 are again run through and the outer traversing curve 4, 6 is finally reached again. This steady-state process is carried out over the entire reversal area Ba, calculated from the extreme apex of the traversing stroke.

It can be seen from FIG. 3 that when viewed step by step in the reversal area Ba, theoretically a coil surface with individual sharp rings is created. However, if the breathing - as provided according to the invention - takes place continuously or the breathing levels are chosen to be as small as is dictated by the digital electronic control, a smooth, cylindrical surface with the diameter D is produced which is larger than the coil diameter d in the region of Coil length with a straight line traversing curve.

The breathing curve is thus calculated and specified in such a way that the amount of thread deposited per unit length of the bobbin is distributed into a cylindrical amount. The slope and curvature of the breathing curve and the course of the slope determine the exact observance of the quantity distribution over the reversal area Ba of the coil.
It can be seen that the course of the guide groove 114 in the reversal area B is also included in the calculation of the breathing curve. The correction factors also come from Thread diameter and other quality parameters of the thread into consideration. These factors can be determined in particular by experimentally determining the distance between the theoretical vertex Eth (FIG. 1) of the traversing law and the actually determined extreme vertex of the thread deposit on the bobbin.

From Fig. 3 it follows that in the reversal area Bi, which the thread guide 108 passes through at maximum breathing stroke (see curve 9 in Fig. 1), the enlarged cylinder circumference OB gently runs into the cylinder circumference 0, which arises in the area with constant traversing speed .

In the exemplary embodiment according to FIGS. 8 and 9, breathing takes place with a variable breathing stroke A1, A2, A3 etc. and the perturbation with variable perturbing amplitude C1, C2, C3 etc. Both in FIG. 8 and in FIG. 9 the abscissa is Timeline. 8, the traverse path H or the breathing stroke A is plotted on the ordinate. 9, the traversing speed is plotted on the ordinate. The traversing speed is given as the double stroke rate DH. The double stroke number is the number per time unit of the back and forth movements of the thread guide 108 (FIG. 7). The traversing speed is continuously varied between the lower, fixed limit value DHU and an upper, variable limit value DHO, whereby - as shown - a linear, sawtooth-shaped fault law can also be used here. As before, the breathing law 1 and the disturbance law 2 are synchronized in such a way that the lowest traversing speed DHU always coincides with the largest traversing stroke in the peak value EA of the breathing curve and the highest traversing speed DHO coincides with the smallest traversing stroke in the inner end point of the breathing curve. This synchronization is used to compensate for the thread tension fluctuations, on the one hand through breathing and on the other hand caused by the disturbance. In contrast to the embodiment according to FIGS. 8, 9, however, the mirror disturbance occurs here in such a way that the lower traversing speed DHU is predetermined via the winding travel. Therefore, the mean value of the traversing speed does not remain constant in the course of a series of mirror disturbance cycles with a variable upper traversing speed DHO. As a result, the deposit angle of the thread on the bobbin is also changed in its mean value. The change is, however, very small. The lower value of the traversing speed DHU preferably remains constant during the winding cycle. However, it is also possible to change the lower value in the course of the winding trip, for example to let it fall off weakly or to rise slightly during the first third of the winding trip and then to let it drop off slightly.

To determine the course of the breathing curve according to FIG. 8:
8 shows three breathing cycles from a series of four breathing cycles. But a series can also include more, e.g. eight breathing cycles. The series of related breathing cycles is characterized in that the breathing stroke A1 of the first breathing cycle is equal to the maximum breathing stroke and that the breathing stroke A2, A3 ... of the following breathing cycles is then continuously shortened from one breathing cycle to the next. The next immediately following series of breathing cycles begins again with the maximum breathing stroke.

It has already been pointed out that the breathing curve represents the displacement of the end point of a traversing stroke during a breathing cycle. The breathing curve typically consists of a shortening branch K and an extension branch L. The shortening branch represents the shortening of the traversing stroke between the outer vertex Ea and the inner vertex Ei of the traversing stroke H.

The extension branch shows the time course of the extension of the apex of the traversing stroke H between the inner apex Ei and the outer apex Ea.

In deviation from the preceding description, a shortening branch K and an extension branch L are assigned to a respiratory cycle.

The first breathing cycle shown in FIG. 8 now has the shortening branch K1 and the extension branch L1. The breathing curve extends over the maximum breathing stroke A _max . The breathing curve of the first cycle is designed in its basic curve, which is shown as a solid line, so that - as already described above with the aid of the diagram according to FIGS. 2, 2A, 3 and 4 - the thickness of the deposited thread layer in the entire breathing stroke A. _{max is} constant and results in a cylindrical coil surface. This layer is marked as layer 1 in Fig. 13A. However, the breathing curve is corrected as indicated by the dashed curve 13.1. The breathing curve 13.1 is designed such that an additional thread quantity 14.1 is deposited in the axial excess area D1 of the bobbin, which is the difference between the maximum breathing stroke A _max or A1 and the breathing stroke A2 of the next breathing cycle with the branches K2, L2. This thread quantity 14.1 forms a layer which is as thick as the sum of all layers which are deposited in the reversal area Ba of the bobbin during the series of breathing cycles concerned.

The resulting breathing curve after the dashed curve 13.1 now has the advantage over the ideal, drawn curve that in the inner end point Ei there is a relatively gentle reversal of the shortening branch K1 into the extension branch L1. This means practically that to drive the breathing rod 126 (Fig. 7) and Cylinder-piston unit 23 only slight decelerations and accelerations are required. It should be pointed out that the correction 13.1 is ideally limited to the excess area D1, but that, for practical, in particular dynamic reasons, a more extensive correction may be appropriate - as shown. The effects of this further correction on the thread placement can, however, be kept low.

As FIG. 8 shows, the following breathing cycle is carried out with a shortened breathing stroke A2. The breathing cycle consists of the shortening branch K2 and the extension branch L2. The basis for the calculation of this curve again is the specification that the thread is uniform over the area of the breathing stroke A2, i.e. to be distributed to an equally thick layer 2 (FIG. 13A). However, this curve is also corrected, and the dashed curve 13.2 is practically driven. This dashed curve is designed such that an additional amount of thread 14.2 is deposited in the axial excess area D2 of the coil between the inner end points Ei2 and Ei3 of the subsequent breathing cycle in such a way that a layer thickness is reached in the axial area D2 which is the sum of all layers of the in of the affected series corresponds to the following shortened breathing cycles.

During the now following breathing cycle, the breathing stroke is again shortened, namely to the breathing stroke A3. Here too, the shortening branch K3 and the extension branch L3 are designed in their basic course so that the thread quantity is distributed over the breathing stroke A3 to form a cylindrical layer 3. In addition, however, the amount of thread 14.3 (FIG. 13A) is additionally deposited in the excess area D3 of the bobbin, by again using the dotted line Correction 13.3 of the breathing curve is made. The additional thread quantity 14.3 in turn reaches the layer thickness of the entire thread layer, which is deposited in the reverse region in the series of breathing cycles.

During the last breathing cycle 4 (not shown) of the series there is again a shortening of the breathing stroke to the breathing stroke A4. The breathing curve is designed so that a uniformly cylindrical layer is wound over the A4 breathing stroke.

This is followed by a new series of breathing strokes, the next breathing cycle beginning with the maximum breathing stroke A _max as shown in FIG. 8, and again a gradual shortening of the breathing stroke from one cycle to the next.

The layer structure of the end region is shown in FIGS. 13A and 13B, four breathing cycles being carried out in a series.

It can be seen from FIG. 13A in a schematic representation that this modified method also results in a cylindrical winding over the breathing region A _max , which has a somewhat larger diameter than the winding in the central region of the coil. In the reversal area Bi, which adjoins the maximum breathing stroke A _max , there is a smooth transition between the winding with a larger diameter and the winding with a smaller diameter, as already described above with reference to FIG. 3.

FIG. 13B shows the layer formation, which is shown schematically in FIG. 13A, in a manner which comes closer to practice. It must be taken into account here that on the one hand the amount of thread deposited during each breathing cycle is very small, since each breathing cycle only lasts a few seconds, for example 6 seconds. On the other hand, it must be taken into account that due to this short duration of a breathing cycle, no sharp edges of the individual layers and thread quantities arise. The thread is a linear structure. The individual thread turns of a layer do not lie close together, but at a distance that can be a few millimeters. Because of this thread spacing of successive turns, the turns deposited in a later layer will always be placed between the turns of the previous layer, ie if the mirror disturbance is functioning, so that the individual layers do not necessarily have different radii from a geometric point of view. What appears as a radially applied thread layer in FIGS. 13A and 13B therefore in reality only becomes noticeable to a large extent only in an increase in the packing density of the bobbin.
It can be seen from FIG. 8 that the corrections of the breathing curves in all cases lead to the breathing movement being able to be carried out with little delay and acceleration.

Fig. 9 now shows that for the mirror disturbance, the traversing speed, starting from the lower double stroke rate DHU, is increased synchronously with the shortening of the traversing stroke H, the upper value of the double stroke rate (DHO2, DHO3 ...) being proportional to the respective one in each mirror fault cycle Shortening the breathing stroke A1, A2, A3 ... compared to the double stroke number DHO of the previous mirror disturbance cycle is also reduced.

In a preferred embodiment of the invention, DHO4, i.e. the smallest upper value of the double stroke rate within a series of breathing and mirror disturbance cycles is chosen at least so large that the ratio of mirror disturbance amplitude (C = DHO - DHU) to cycle time T does not fall below a certain predetermined value. The mirror interference amplitude C3 is the difference between the smallest upper double stroke rate DHO3 and the lower double stroke rate DHU. Half the cycle time T / 2 is the time for increasing the double stroke rate from DHU to DHO. The ratio C3 / T / 2 shows the smallest slope of the mirror interference curves according to FIG. 9. This lowest pitch must be so great that two thread turns, which are placed directly next to one another by successive traversing strokes, have a distance measured perpendicular to the thread that is at least equal to the thread thickness. One can also formulate: The distance in the axial direction must be at least equal to the placement width (measured in the axial direction) with which the multifilament thread is deposited on the spool. This placement width is to be determined on the spool by measurement.

Another embodiment of the invention will now be explained with reference to FIGS. 10 to 12. The breathing law and the resulting thread deposit on the bobbin corresponds to the description and illustration according to FIGS. 8 and 13, 13A. The embodiment of the mirror disturbance according to FIG. 11 corresponds to the representation and description according to FIG. 5. That is, the mirror disturbance amplitude is constant.

If one assumes with a constant mirror disturbance amplitude that the upper value of the double stroke rate DHO is dimensioned such that it results in an ideal thread tension compensation at maximum breath stroke, it follows that with the smallest breath stroke no complete thread tension compensation more takes place. For this reason, the circumferential speed of the coil - as shown in FIG. 12 - is increased synchronously with the respiration or mirror disturbance in this exemplary embodiment. During the breathing cycle with maximum breathing stroke A _max , the peripheral speed of the coil is equal to the initial value VAO. Synchronously with the beginning of a breathing cycle with a shortened breathing stroke A2, there is also a slight increase in the peripheral speed V of the coil, the difference between V2 and V1 being proportional to the difference between the breathing strokes A1 and A2. Then, as the traversing stroke is extended, the traversing speed is again reduced to its initial value VAO = V1. When the next breathing cycle is carried out, the traversing speed is increased again, to an increased value V3. The difference V3 - V1 is in turn proportional to the total shortening of the breathing stroke A _max - A3. By appropriately specifying the initial value of the circumferential speed of the bobbin V1 and the increased values V2 and V3, which can be determined by calculation and experiment, a complete thread tension compensation can be brought about, so that the thread tension to which the thread is subjected to the bobbin neither during the winding travel fluctuates during a series of breathing cycles even during one breathing cycle.

It can be seen that the method according to FIG. 12 can also be combined with a method according to FIGS. 8, 9. This will be done with advantage if a viable compromise cannot be found between the requirement for good mirror interference and the requirement for thread tension compensation.

Another exemplary embodiment of the invention is explained with reference to FIGS. 14 to 16. 15 corresponds to the representation and Description according to Fig. 5. That is, the mirror interference amplitude is constant. However, it should be pointed out in advance that the method according to FIGS. 14, 16, which is described below, can also be combined with a mirror interference method according to FIG. 9. The possibility of varying the mirror interference amplitude will be used in particular if this is necessary to compensate for thread tension fluctuations. In this respect, reference is made to the description of FIG. 5.

A biconical winding is produced with the aid of the traversing diagram according to FIG. 14. At the beginning of the winding cycle, the thread is laid with the initial traverse stroke H1. In the course of the winding cycle, the traversing stroke H is constantly reduced, on both sides of the coil. This creates a cylindrical coil with flattened, ie conical end faces. The difference in the axial winding length between the initial winding and the final winding is denoted by D. This means that the basic traverse stroke becomes smaller and smaller during the winding cycle. Breathing now starts from this decreasing basic traverse stroke.

Breathing occurs with a variable breathing stroke A1, A2, A3 etc. Both in FIGS. 14 to 16, the abscissa is the time axis. 15 the traversing speed is plotted on the ordinate. The traversing speed is given as the double stroke rate DH. The double stroke number is the number per time unit of the back and forth movements of the thread guide 108 (FIG. 7). The traversing speed is continuously varied between the lower, fixed limit value DHU and an upper, variable limit value DHO, whereby - as shown - a linear, sawtooth-shaped fault law can also be used here. As before, the breathing law 1 and the disturbance law 2 are synchronized in such a way that the lowest traversing speed DHU always coincides with the largest traversing stroke in the peak value EA of the breathing curve and the highest traversing speed DHO coincides with the smallest traversing stroke in the inner end point of the breathing curve. This synchronization serves to compensate the thread tension fluctuations, which are caused on the one hand by breathing and on the other hand by the disturbance.

14, the traverse path H or the breathing stroke A is plotted on the ordinate. It can be seen that the basic traverse stroke changes constantly compared to the initial traverse stroke. In the illustration according to FIG. 14, the basic traversing stroke forms a straight line rising at the angle beta. The traversing stroke now constantly returns to this basic traversing stroke in the course of a breathing cycle, and the breathing strokes A1 to A4 are calculated from this basic traversing stroke.

To determine the course of the breathing curve according to FIG. 14:
14 shows three breathing cycles from a series of four breathing cycles. But a series can also include more, e.g. eight breathing cycles. The series of related breathing cycles is characterized in that the breathing stroke A1 of the first breathing cycle is equal to the maximum breathing stroke and that the breathing stroke A2, A3 ... of the following breathing cycles is then continuously shortened from one breathing cycle to the next. The next immediately following series of breathing cycles begins again with the maximum breathing stroke.

It has already been pointed out that the breathing curve represents the reduction of the traversing stroke compared to the basic traversing stroke during one breathing cycle. The breathing curve typically consists of a shortening branch K and an extension branch L. The shortening branch represents the shortening of the traversing stroke between the outer vertex Ea = basic traversing stroke and the inner vertex Ei of the traversing stroke H. The extension branch shows the time course of the extension of the apex of the traversing stroke H between the inner vertex Ei and the outer vertex Ea = basic traversing stroke.

In the following, a shortening branch K and an extension branch L are assigned to a respiratory cycle.

The first breathing cycle shown in FIG. 14 now has the shortening branch K1 and the extension branch L1. The breathing curve extends over the maximum breathing stroke A _max . The breathing curve of the first cycle is designed in its basic curve, which is shown as a solid line, so that - as already described above with the aid of the diagram according to FIGS. 2, 2A, 3 and 4 - the thickness of the deposited thread layer in the entire breathing stroke A. _{max is} constant and results in a cylindrical coil surface. This layer is marked as layer 1 in Fig. 17A. However, the breathing curve is corrected as indicated by the dashed curve 13.1. The breathing curve 13.1 is designed so that in the axial excess area D1 of the coil, which is the difference between the maximum Breathing stroke A _max or A1 and the breathing stroke A2 of the next breathing cycle with the branches K2, L2, an additional thread quantity 14.1 is deposited. This thread quantity 14.1 forms a layer which is as thick as the sum of all layers which are deposited in the reversal area Ba of the bobbin during the series of breathing cycles concerned.

The resulting breathing curve after the dashed curve 13.1 now has the advantage over the ideal, drawn curve that in the inner end point Ei there is a relatively gentle reversal of the shortening branch K1 into the extension branch L1. This means in practice that only slight decelerations and accelerations are required to drive the breathing rod 126 (FIG. 7) and the cylinder-piston unit 23. It should be noted that the correction 13.1 is ideally limited to the excess area D1, that for practical, in particular dynamic reasons, possibly. however, a further correction is advisable - as shown. The effects of this further correction on the thread placement can, however, be kept low.

As shown in FIG. 14, the following breathing cycle is carried out with a shorter breathing stroke A2. The breathing cycle consists of the shortening branch K2 and the extension branch L2. The basis for the calculation of this curve again is the specification that the thread should be distributed evenly over the area of the breathing stroke A2, that is to say to an equally thick layer 2 (FIG. 17A). However, this curve is also corrected, and the dashed curve 13.2 is practically driven. This dashed curve is designed such that an additional amount of thread 14.2 is deposited in the axial excess area D2 of the bobbin between the inner end points Ei2 and Ei3 of the subsequent breathing cycle in such a way that A layer thickness is reached in the axial region D2 which corresponds to the sum of all layers of the shorter breathing cycles that follow in the series concerned.

During the now following breathing cycle, the breathing stroke is again shortened, namely to the breathing stroke A3. Here too, the shortening branch K3 and the extension branch L3 are designed in their basic course so that the thread quantity is distributed over the breathing stroke A3 to form a cylindrical layer 3. In addition, however, the amount of thread 14.3 (FIG. 17A) is additionally stored in the excess area D3 of the bobbin by again making the dashed-line correction 13.3 of the breathing curve. The additional thread quantity 14.3 in turn reaches the layer thickness of the entire thread layer, which is deposited in the reverse region in the series of breathing cycles.

During the last breathing cycle 4 (not shown) of the series there is again a shortening of the breathing stroke to the breathing stroke A4. The breathing curve is designed so that a uniformly cylindrical layer is wound over the A4 breathing stroke.

This is followed by a new series of breaths, the next breath cycle beginning with the maximum breath stroke A _max as shown in FIG. 14, and again a gradual shortening of the breath stroke from one cycle to the next.

FIGS. 17A and 17B show the layer structure of the end area, four breathing cycles being carried out in a series.

It can be seen from FIG. 17A in a schematic representation that the shortening of the basic traverse stroke compared to the initial traverse stroke leads to the end faces of the Coil is canceled, ie becomes conical. It should be noted, however, that the cone angle has been drawn oversized in Figures 17A, B. In reality, changing the basic traverse stroke during a breathing cycle that lasts a few seconds does not have as much of an impact.

It can be seen from FIG. 17A in a schematic representation that this modified method also results in a cylindrical winding over the breathing area A _max , which has a somewhat larger diameter than the winding in the central area of the coil. In the reversal area Bi, which adjoins the maximum breathing stroke A _max , there is a smooth transition between the winding with a larger diameter and the winding with a smaller diameter, as already described above with reference to FIG. 3.

FIG. 17B shows the layer formation, which is shown schematically in FIG. 17A, in a manner which comes closer to practice. 17B, the slope angle of the front edge is too large. In the context of this application it must be taken into account that, on the one hand, the amount of thread deposited during each breathing cycle is very small, since each breathing cycle lasts only a few seconds, for example 6 seconds. On the other hand, it must be taken into account that due to this short duration of a breathing cycle, no sharp edges of the individual layers and thread quantities arise. The thread is a linear structure. The individual thread turns of a layer do not lie close together, but at a distance that can be a few millimeters. Because of this thread spacing of successive turns, the turns deposited in a later layer will always be placed between the turns of the previous layer, ie if the mirror disturbance is functioning, so that the individual layers are not necessarily geometrically underneath have different radii. What appears as a radially applied thread layer in FIGS. 17A and 17B is therefore in reality only to a large extent noticeable only in an increase in the packing density of the bobbin. It can be seen from Fig. 14 that the corrections of the breathing curves in all cases lead to the breathing movement being able to be carried out with little deceleration and acceleration.

9, the traversing speed, starting from the lower double stroke rate DHU, could be increased synchronously with the shortening of the traversing stroke H, the upper value of the double stroke rate (DHO2, DHO3 ...) being proportional to each mirror disturbance cycle the respective shortening of the breathing stroke A1, A2, A3 ... compared to the double stroke number DHO of the previous mirror disturbance cycle is also reduced. For further refinement, reference is made to the explanations relating to FIG. 9.

However, if the breathing process is operated with constant mirror interference - as shown in FIG. 15 - it may be advantageous to also change the peripheral speed to compensate for thread tension fluctuations, as is shown with reference to FIG. 16. First of all, the peripheral speed is increased synchronously with the decreasing basic traverse stroke compared to the initial value of the peripheral speed VA0. This continuously increasing peripheral speed is designated "basic peripheral speed" in the diagram according to FIG. 16, in which the ordinate represents the peripheral speed of the coil. According to the invention, there is now a further modification.

If one assumes with a constant mirror interference amplitude that the upper value of the double stroke rate DHO is so dimensioned sen is that it results in an ideal thread tension compensation at the maximum breath stroke, it follows from this that no complete thread tension compensation takes place at the smallest breath stroke. For this reason, the circumferential speed of the coil - as shown in FIG. 16 - is increased in synchronism with the respiration or mirror disturbance compared to the basic circumferential speed in this exemplary embodiment. During the breathing cycle with maximum breathing stroke A _max , the peripheral speed of the coil is equal to the basic peripheral speed. Synchronously with the beginning of a breathing cycle with a shortened breathing stroke A2, there is also a slight increase in the peripheral speed V of the coil, the difference between V2 and V1 being proportional to the difference between the breathing strokes A1 and A2. Then, as the traversing stroke is extended, the traversing speed is again reduced to the basic peripheral speed. When the next breathing cycle is carried out, the traversing speed is increased again, to an increased value V3. The difference V3 - V1 is in turn proportional to the total shortening of the breathing stroke A _max - A3. By appropriately specifying the initial value and basic value of the peripheral speed of the bobbin V1 and the increased values V2 and V3, which can be determined by calculation and experiment, complete thread tension compensation can be brought about so that the thread tension to which the thread is subjected on the bobbin is fluctuates neither during the winding cycle nor during a series of breathing cycles nor during a breathing cycle.

REFERENCE SIGN LISTING

• 1 breathing curve
• 2 fault curve
• 3 Changier Law
• 4 straight branches
• 5 transition point
• 6 curved branch
• 7
• 8 Time-path diagram of the traverse stroke
• 9 curve
• 10 curve
• 11 curve
• 12 curve
• 13 curve
• 14 Thread quantity, accumulation, additional quantity
  
• 18 program unit
• 19 Signal / current transformers
• 20 electromagnet
• 21 hydraulic control valve
• 22 spring
• 23 cylinder-piston unit
• 24 piston rod
• 25 sledges
• 26 unit
• 27 iron core
• 28 piston rod
• 29 Confederation, Tax Association
• 30 bunch
• 31 fret
• 32 pump
• 33 tank
• 34 back
• 35 spring plate
• 36 spring plate
• 37 pistons
• 38 front
• 39 channel
• 40 channel
• 41 channel
• 42 channel
• 43 arm
• 44 channel
• 45 shoulder
• 46 plain bearings
• 47 stop
• 48 flange
• 49 rod
• 50 engine
• 51 frequency converter
• 52 engine
• 53 program unit
• 54 timers

Claims (10)

1. Method for winding a thread into a package
with back and forth (traversing) of the thread when the thread guide reverses movement in the reversing areas of the traversing stroke with a predetermined, finite deceleration and finite acceleration
as well as breathing the traverse stroke,
characterized in that
breathing is carried out according to a wave-shaped time diagram with wave troughs running in a parabola-like manner (breathing curve) in such a way that, at least in the reversal area (Ba) of the greatest traversing stroke, the wound amount of thread is distributed essentially uniformly to form a cylindrical winding,
wherein the cylindrical winding has a slightly larger diameter than the central region of the coil and
the respiration curve having its apex at the outer end point of the traversing stroke and reversing with great deceleration and acceleration in the innermost end point of the traversing stroke and extending in the axial direction at least over the reversing region (Ba) of the traversing with the greatest traversing stroke. 2. The method according to claim 1,
characterized in that
the breathing stroke A _{max of} consecutive breathing curves remains the same. 3. The method according to claim 1,
characterized in that
in a series of successive breathing cycles, the breathing stroke of a (second) breathing cycle is shortened compared to the breathing stroke of the previous (first) breathing cycle
and that the timing diagram of the first breathing cycle is designed such that (according to claim 1)
in its breathing stroke (A _max = A1) the wound amount of thread is distributed essentially evenly into a cylindrical winding,
and that in addition in the excess part (D1) of the first breathing stroke, by which the breathing stroke (A1) of the first breathing cycle exceeds the breathing stroke (A2) of the subsequent, second breathing cycle (D1 = A1 - A2), an additional amount of thread is deposited in a layer thickness , which essentially corresponds to the layer thickness of all subsequent breathing cycles with a shortened breathing stroke. 4. The method according to claim 3,
characterized in that
in a series of breathing cycles the breathing stroke (A1, A2, A3 ...) of the successive breathing cycles is continuously reduced and increased again at the beginning of the new series to the initial value (A1 = A _max ) of the breathing stroke. 5. The method according to any one of claims 3 or 4,
characterized in that
the mirror disturbance occurs synchronously with the breathing cycles in the sense of the compensation of the thread tension, whereby the mirror disturbance amplitude (C1, C2, C3 ...), which is the difference (DHO - DHU) between the maximum and minimum traversing speed, during a series of breathing cycles in Dependence on the decreasing breathing stroke (A1, A2, A3 ...) decreases. 6. The method according to claim 5,
characterized in that
the mirror disorder occurs in such a way
that the minimum traversing speed (DHU) in the course of the winding travel follows a law specified for the winding travel (e.g. remains constant) and that the traversing speed during each series of breathing cycles is synchronized with the reaching of the breathing stroke to a maximum value (DHO1, DHO2, DHO3. ..) is increased, which depends on the respective size of the breathing stroke (A1, A2, A3 ...). 7. The method according to any one of claims 1 to 6,
characterized in that
the duration of a breathing cycle and the mirror-disturbance cycle synchronized with it, as well as the smallest value of the maximum traversing speed (DHO4) within a series of breathing strokes is specified so large,
that the change in the bobbin ratio (spindle speed / traversing speed), which is caused during a double stroke by the change in the traversing speed, leads to a distance of two successive thread turns, which is greater than the depositing width of the thread on the bobbin. 8. The method according to any one of the preceding claims,
characterized in that
for thread tension compensation, the peripheral speed of the bobbin is increased synchronously with the breathing cycles in such a way that the greatest breathing stroke is synchronized with the greatest peripheral speed of the bobbin. 9. The method according to claim 3 or 4,
characterized in that
the mirror disturbance occurs synchronously with the breathing cycles in the sense of equalizing the thread tension, whereby the mirror disturbance amplitude (C1), which is the difference DHO - DHU) between the maximum and minimum traversing speed, remains constant, and that the circumferential speed of the coil is reduced in all breathing cycles Breathing stroke is changed in dependence on the size of the reduction in the breathing stroke in such a way that the thread tension remains essentially constant. 10. The method according to any one of the preceding claims,
characterized in that
for thread tension compensation, the peripheral speed of the bobbin is increased synchronously with the decreasing traversing stroke.

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