Method and machine for spinning

Abstract

The invention relates to a method and a machine in which the yarn is operated between a device for feeding the yarn and a yarn gathering device by means of a tensioning device, a twisting device having a diameter DB, and a guiding device, the yarn gathering device (2) being connected to an actuating device for rotating the yarn gathering device (2) at a predetermined speed, the yarn forms a spiral path with at least two balloons (4) at a point location located within a distance LB, the distance LB corresponding to the distance between the guiding means and the twisting means, the distance LB being at least three times the distance DB. The method is characterized in that, during the spinning process, the yarn is constrained by a first constriction ring (2) on one of the balloons (4), the first constriction ring (2) having a defined constriction or shape in the line of contact (Y) with the balloons (4), such that the shape of each subsequent balloon (4), i.e. The shape of the balloon located downstream of the balloon constricted by the balloon constriction ring (2), is the shape of the balloon located downstream of the balloon constricted by the balloon constriction ring (2). The first contraction ring (2) is changed without the contraction ring and has a new contraction shape (Y ', Y' '...) related to the contraction shape of the first contraction ring (2), so that the change of tension in the spinning process is reduced.

Description

[0001] Purpose of the Invention

[0002] As indicated by the title of this specification, the present invention relates to a method and a machine for spinning yarn, which provide advantages and features for achieving the intended use of the invention, which will be described in detail below, and which represent an improvement over the prior art.

[0003] The object of the present invention relates to a method for spinning and to a machine for spinning for implementing said method, in particular a machine with a ring spinning and twisting station. The machine comprises a station comprising, on the one hand, a system with a delivery roller for feeding the fibers and, on the other hand, a ring with a rotating annular slide on an annular track, and a spindle arranged on the track; there is a distance LB between them in which at least two balloons are formed when the fibers rotate for twisting. The method envisages including on one of the balloons at least one shrinking ring with a determined configuration, so that the shape of each subsequent balloon is changed in a free manner (i.e. without further shrinking rings) to a new shrinking shape related to the shape of the shrinking ring, thereby reducing the tension variations during spinning. Technical Field

[0004] The field of application of the invention belongs to the industrial category dedicated to the manufacture of spinning yarns, more specifically to the manufacture of machines for spinning yarns, in particular machines having a ring spinning station or a twisting station. Background Art

[0005] Spinning stations and twisting stations for spinning or twisting on ring machines are well known in the prior art. In particular, in the field of so-called multi-balloon spinning, it is possible to operate with a relatively low incidence of ends down and a consistently good yarn quality.

[0006] Document ES201631732, also owned by the applicant, describes a method for producing yarn using a ring spinning machine or a ring twisting machine, in which a spiral path of the fiber structure is formed in a stable manner along the full height of the multiple balloons using at least two balloons, and preferably without using a balloon shrinking ring.

[0007] In any case, balloon shrink rings known in the prior art only affect the diameter of the constrained balloon.

[0008] It is therefore an object of the present invention to eliminate the known disadvantages of the prior art.

[0009] In particular, the task is to create a spinning station of a ring spinning or twisting machine which substantially keeps the tension more constant, thereby reducing the range of variations and ensuring more stable operation of the spinning or twisting station and ultimately increasing the productivity of said machine. Summary of the invention

[0010] The method and the machine for spinning proposed by the present invention are configured as an ideal solution to the aforementioned purposes, the characteristic details which make this possible and which distinguish it being conveniently included in the final claim appended to this description.

[0011] In the method for spinning of the present invention,

[0012] The yarn runs between the device for supplying the yarn and the yarn gathering device through the following devices;

[0013] A tensioning device, preferably comprising a slider (11),

[0014] o a twisting device having a diameter DB, preferably comprising a ring (10), and

[0015] o a guiding device, consisting of an output point PS of the device supplying the yarn and / or a yarn guide (7) or equivalent,

[0016] The yarn gathering device (2) is connected to an actuating device, which is used to rotate the yarn gathering device (2) at a predetermined speed,

[0017] The fiber structure is caused to form a spiral path with at least two balloons (4) at a point located within a distance LB, which corresponds to the distance between the guide device and the twisting device, and the distance LB is at least three times the distance DB.

[0018] Basically, during the spinning process, the yarn is constrained by a first shrinking ring (2) on one of the balloons (4), the first shrinking ring (2) having a determined shrinkage or shape in the contact line (Y) with the balloon (4), so that the shape of each subsequent balloon (4), i.e. the shape of the balloon located downstream of the balloon contracted by the balloon shrinking ring (2), is changed without the need for a shrinking ring, having a new shrinking shape (Y', Y" ...) related to the shrinking shape of the first shrinking ring (2), thereby reducing the variation of tension during the spinning process.

[0019] The guide means determine the point at which the balloon begins to be created. In machines comprising a thread guide, the guide means consist of the thread guide, whereas in machines not comprising a thread guide or an equivalent element (such as a rod), the guide means is the output point PS of the supply means.

[0020] For example, in some types of spinning machines, such as ring twisting machines, the means for feeding the yarn consist of a feeding capstan, or even in the case of glass fiber twisting, the feeding system is a motorized coil delivering the yarn. In these cases, since there are no yarn guides, the guiding means consist of the output point PS of the means for feeding the fiber structure.

[0021] In this specification, when the name of yarn is used, it also refers to the "fiber bundle" or "fiber structure" used in the ring spinning machine. The "fiber bundle" or "fiber structure" after the spinning process becomes yarn.

[0022] In any case, the overlap of the distance LB and the height of the multiple balloons is also referred to as the multiple balloon area.

[0023] For better explanation, the multiple balloons or balls formed maintain a certain formation order along the direction of the yarn trajectory, with the first balloon being closest to the guiding device, that is, closest to the output point of the supply system, or, in appropriate circumstances, closest to the yarn guide, and the middle balloons being the second, third, fourth, fifth, sixth, seventh... balloons in sequence, until reaching the last balloon, that is, the balloon closest to the ring (10).

[0024] The shape of each balloon formed, whether the first, middle or last, is described by the following dimensions: maximum diameter, upper neck diameter, lower neck diameter and height between the two necks.

[0025] Thus, the diameter of the lower neck of the balloon coincides with the diameter of the upper neck of the consecutive subsequent balloon, or vice versa, the diameter of the upper neck of the balloon coincides with the diameter of the lower neck of the consecutive preceding balloon.

[0026] The upper and lower neck diameters of the same balloon need not be the same; in fact, the neck diameter increases slightly as the fiber bundle spirals along different balloons.

[0027] Furthermore, the maximum diameters of the balloons in a multi-balloon structure may be different, even though they are very close to each other.

[0028] In any case, the contraction loop (2) of the constraining yarn on one of the balloons (4) logically influences the shape of the constrained balloon when a determined contraction or shape is imposed in the contact line (Y) with the balloon (4).

[0029] For better explanation, it is pointed out that the contact surface between the shrink ring and the balloon rotating at a rotation speed related to the number of spindle revolutions is a rotating body characterized or formed by a minimum rotation radius and a contact line of determined shape and specific length.

[0030] The minimum rotation radius is the distance between the rotation axis of the coil and the spindle to the closest point of the contact line.

[0031] Advantageously, then, when at least a first shrink ring is applied to one of the balloons, the shape of each subsequent balloon of the balloon constrained by said balloon shrink ring is modified in a free and stable manner (without the need for a shrink ring), and such that these new shrink shapes of each subsequent balloon are related to the shrink shape of the shrink ring.

[0032] In other words, the spinning method of the present invention is a multi-balloon spinning method, in which one of the balloons is contracted by a contraction ring, and the contraction is performed by a ring with a certain shape. Since this shape affects the subsequent balloons, the shapes of the subsequent balloons are automatically changed in a stable and immediate manner, and the changed shape is related to the shape of the contact surface of the contraction ring and the constrained balloon.

[0033] This influence on the balloon is particularly attractive in ring spinning applications, such as ring spinning without a slider or ring spinning with a magnetic ring. Being able to control the tension, shape and diameter of a constant balloon is a great help in achieving sliderless spinning with magnetic rings or air rings or other forms of structure. The current problem with these systems is the tension changes caused by the changes in balloon diameter caused by the centripetal force of the yarn, which leads to stability problems. Multi-balloon spinning with a balloon shrink ring can operate with constant tension and a stable, balanced balloon diameter without excessively increasing the friction experienced by the yarn.

[0034] In a preferred relationship of the method for spinning of the present invention, the yarn gathering device includes a spindle (14) arranged on a spindle rail (3) having a sleeve (15) or a coil, the yarn is gathered in the sleeve (15) or the coil after being twisted, and is characterized in that the ring (10) is located on an annular track (12), and the annular track (12) moves vertically relative to the fixed spindle rail (3). Alternatively, the yarn gathering device includes a spindle (14) arranged on a spindle rail (3) having a sleeve (15) or a coil, the yarn is gathered in the sleeve (15) or the coil after being twisted, and is characterized in that the spindle rail (3) moves vertically relative to the ring (10) located on the fixed annular track (12).

[0035] Furthermore, the position of the shrink ring relative to the balloon to be constrained is also important.

[0036] Preferably, the variation of yarn tension during the process is related to the difference between the maximum diameter of the balloon and the diameter of its corresponding neck. Therefore, preferably, the smaller the difference in diameter, the smaller the difference between the maximum tension and the minimum tension of the yarn when the yarn passes through the area of ​​each balloon.

[0037] Therefore, in a preferred embodiment, the length of the contact line between the balloon and the shrink ring is at least 10 mm, 8 mm, 6 mm, 4 mm, 2 mm, or even 1 mm, and at most 100 mm, including a length up to LB, regardless of the shape of the contact line and its rotation or turning radius.

[0038] For its part, it has been found to be advantageous if the minimum radius of rotation of the line of contact (Y) of the balloon with the shrink ring (2), limited by the input point (K1) and the output point (K2) of at least one balloon shrink ring, is preferably between 5 mm and 300 mm, and for rope manufacturing or other applications even up to 300 mm, 500 mm or 800 mm or more.

[0039] The shape of the contact line and its minimum radius of rotation are relevant to reducing or minimizing the variation in yarn tension during spinning.

[0040] The contact line (Y) of the balloon with the shrink ring (2) is limited by the input point (K1) and the output point (K2), and the contact line (Y) can be in the form of a straight line parallel to the axis of rotation of the spindle (14), in the form of a rising or falling cone, or in the form of a curved concave or curved convex, or any combination of the aforementioned shapes. Also preferably, the contact line can be in the form of a spiral, simulating the coil of a spring defining a line segment.

[0041] According to a variant embodiment, in the spinning method of the present invention, a second, third, fourth or fifth or more additional balloon shrink rings (these additional balloon shrink rings may be shrink rings of the same or different shapes) are applied to any balloon to utilize the shape of the additional shrink rings to imitate the structure or shape of a subsequent balloon or multiple balloons until the yarn reaches the ring track with the desired orientation and balloon shape.

[0042] Therefore, in a preferred embodiment, during the spinning process, the yarn is constrained by a second shrinkage ring (21) on one of the balloons (4), and the second shrinkage ring (21) has a certain shrinkage or shape in the contact line (Y1) with the balloon (4) that is the same as or different from that of the first shrinkage ring (2), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the second balloon shrinkage ring (21), is changed without the need for a shrinkage ring and has a new shrinkage shape (Y1', Y1" ...) related to the shrinkage shape of the second shrinkage ring (21).

[0043] In a more preferred embodiment, during the spinning process, the yarn is constrained by a third shrinkage ring (not shown) on one of the balloons (4), and the third shrinkage ring has a certain shrinkage or shape in the contact line with the balloon (4), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the third balloon shrinkage ring (not shown), is changed without the need for a shrinkage ring and has a new shrinkage shape related to the shrinkage shape of the third shrinkage ring (not shown).

[0044] It has been found that it is also advantageous to place at least two consecutive balloon shrink rings very close to each other to simulate a single balloon shrink surface. In this case, preferably, the minimum distance between the two contact lines of the rings is 1 mm to 400 mm, and this minimum distance between the two contact lines of the rings can be the distance LB.

[0045] The distance M between the output point (K2) and the input point (K1) of the contact line (Y) of two consecutive shrink rings (2, 21) is preferably between 0.1 mm and the distance LB.

[0046] Furthermore, within the same shrink ring, it is also advantageous that the contact line between the balloon and the shrink ring is discontinuous, since this can produce a similar effect at the level of shrinkage of the balloon, with the advantage of less contact with the yarn and reduced yarn hairiness. Therefore, in a preferred embodiment, the contact line (Y) between the input point (K1) and the output point (K2) of the shrink ring (2) is discontinuous and thus produces discontinuous friction.

[0047] Preferably, during the process, the distance LB is varied by means of means for moving the circular track (12).

[0048] The vertical position of the at least one shrink ring (2) can also be varied in a free manner in the region of the balloon (4).

[0049] The vertical position of at least one shrink ring (2) is preferably integrated with the annular track (12) and adjustable. Alternatively, the vertical position of at least one shrink ring (2) can be integrated with the spindle track (3) and adjustable.

[0050] The present invention also aims to provide a spinning machine, comprising:

[0051] a device for feeding the yarn,

[0052] a yarn gathering device connected to an actuating device for rotating the yarn gathering device (2) at a predetermined speed,

[0053] A tensioning device, preferably comprising a slide block (11),

[0054] a twisting device having a diameter DB, preferably comprising a ring (10), and

[0055] a guiding device, consisting of an output point PS of the device for supplying the yarn and / or a yarn guide (7) or equivalent,

[0056] The fiber structure is caused to form a spiral path with at least two balloons (4) at a point located within a distance LB, which corresponds to the distance between the guide device and the twisting device, and the distance LB is at least three times the distance DB.

[0057] The machine essentially comprises a first shrinking ring (2) constraining the yarn on one of the balloons (4), the first shrinking ring (2) having a determined shrinkage or shape in the contact line (Y) with the balloon (4), so that the shape of each subsequent balloon (4), i.e. the shape of the balloon located downstream of the balloon constrained by the balloon shrinking ring (2), is changed without the need for a shrinking ring, having a new shrinking shape (Y', Y", ...) related to the shrinking shape of the first shrinking ring (2), thereby reducing the tension variations during spinning.

[0058] In a preferred embodiment, the machine comprises a second shrinking ring (21) on one of the balloons (4), the second shrinking ring (21) constraining the yarn, the second shrinking ring (21) having a determined shrinkage or shape in the contact line (Y1) with the balloon (4) that is the same as or different from that of the first shrinking ring (2), so that the shape of each subsequent balloon (4), i.e. the shape of the balloon located downstream of the balloon constrained by the second balloon shrinking ring (21), is changed without the need for a shrinking ring and has a new shrinking shape (Y1', Y1" ...) related to the shrinking shape of the second shrinking ring (21).

[0059] In a more preferred embodiment, the machine for spinning includes a third shrinking ring (not shown) located on one of the balloons (4), the third shrinking ring constraining the yarn, and the third shrinking ring has a certain shrinkage or shape in the contact line with the balloon (4), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the third balloon shrinking ring (not shown), is changed without the need for a shrinking ring and has a new shrinking shape related to the shrinking shape of the third shrinking ring (not shown).

[0060] The yarn feeding device preferably comprises a drafting system (5) followed by a compacting system.

[0061] In a preferred embodiment, at least one shrink ring (2, 21) has a joint (not shown) allowing it to be removed from its working position, thereby facilitating the replacement of a filled yarn sleeve (15) or coil with an empty sleeve (15) or coil.

[0062] In a preferred embodiment, the diameter of the shrink ring can be changed to adjust the diameter of the balloon (minimum rotation radius (X)), thereby reducing the tension variation and maintaining the balance of the spinning process.

[0063] In a more preferred embodiment, all of the above variables, such as the vertical position of the shrink ring or the diameter of the shrink ring or the contact line between the shrink ring and the balloon, can be changed independently of each other during the spinning process, thereby reducing tension changes and maintaining the balance of the spinning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] For the purpose of complete description and to help more easily understand the features of the present invention, this specification is accompanied by a set of drawings which form an integral part of this specification, by way of illustration and not limitation, which are shown as follows:

[0065] Figure 1-A shows a schematic elevational view of an exemplary embodiment of a spinning station of a ring spinning twisting machine according to the prior art, which operates in a stable and balanced manner, i.e. without a balloon shrink ring, showing the main components and elements comprised and their arrangement in its variants, with a movable thread guide, a fixed spindle table and a movable ring table;

[0066] Figure 1-B A schematic elevational view of an exemplary embodiment of a spinning station of a ring spinning twisting machine according to the invention is shown, which shows the incorporation of a shrink ring on one of the balloons, in particular the first balloon, for constraining the fibers during the spinning process; in this case, a variant without a yarn guide is shown, with a movable spindle table and a fixed ring table; in this case, the control ring is fixed to the spindle table, but its position can be adjusted within the distance LB during the spinning cycle;

[0067] Figure 1-C A schematic elevation view of another exemplary embodiment of a spinning station according to the invention is shown, which is similar to the above-described Figure 1-B The same spinning station as shown in , in this case comprising a second shrinking ring of different shape in the third balloon, which confines the fibers during the spinning process; in this case, a variant without yarn guides is described, which has a movable spindle table and a fixed ring table; in this case, the shrinking rings are fixed to the spindle table, but the position of each shrinking ring can be adjusted within the distance LB during the spinning cycle;

[0068] Figure 2-A A schematic diagram showing an enlarged portion of the area of ​​a spinning station according to the invention, containing a shrink ring, in one example of which the contact line Y with the constrained balloon is vertical and parallel to the axis of rotation;

[0069] Figure 2-B A schematic diagram showing an enlarged portion of a machine station according to the invention similar to the previous figure, showing a shrinking ring, in this case in an example of which the contact line is in the shape of a descending cone;

[0070] Figure 2-C shows a schematic diagram of another exemplary embodiment similar to the previous one, in which case the contact line of the shrink ring in the exemplary embodiment is a rising cone;

[0071] Figure 2-D shows a schematic diagram of another exemplary embodiment similar to the previous one, in which case the contact line of the shrink ring is discontinuous and has a concave-convex shape;

[0072] Figure 2-E A schematic diagram is shown of another exemplary embodiment, in which case two shrink rings are located in the same balloon, wherein the contact line of the shrink rings is straight and parallel to the axis of rotation; and

[0073] Figure 3 A schematic diagram of a multi-balloon structure is shown, wherein the parameters defining the balloon are marked, namely, the maximum diameter of the balloon, the diameter of the balloon neck, and the height of the balloon. DETAILED DESCRIPTION

[0074] In view of the aforementioned drawings, and according to the reference numerals adopted, several non-limiting exemplary embodiments of the machine for spinning yarns of the present invention can be seen therein, including what is described in detail below.

[0075] Thus, as shown in the said figure, in one embodiment of the machine for spinning according to the invention, the method described in the preceding section is applied, which embodiment minimizes the variation of the yarn tension during the twisting process in the spinning station (1), and which embodiment comprises in a known manner: at one end, a drafting system (5) for drafting the fiber structure (6) and optionally a yarn guide (7), the drafting system (5) having at least one pair of output rollers (9) defining an output point PS; at the other end, a ring (10) located on a circular track (12), and a spindle (14) arranged on a spindle rail (3) having a sleeve (15) or a coil, the ring (10) having a ring (10) The yarn is twisted and wound in a sleeve (15) or a coil; wherein, between the output roller pair (9) and the rotating annular slider (11), or under appropriate conditions, between the yarn guide (7) and the rotating annular slider (11), the fiber structure forms a spiral path with at least two balloons (4); wherein at least one balloon shrinking ring (2) is arranged between the output roller pair (9) and the annular track (12); and wherein the ratio of the distance LB (the distance between the output roller pair (9) or the yarn guide (7) and the ring member (10) of the annular track (12)) to DB (the inner diameter of the ring member 10) is greater than 3, that is, the following expression is satisfied:

[0076] 3 <LB / DB。

[0077] exist Figure 1-A In the figure, an exemplary embodiment of a spinning station (1) is schematically shown, wherein the balloon (4) does not include any shrinking rings that form the yarn structure during twisting, and the shape that the balloon (4) adopts in a stable and balanced manner is shown.

[0078] In itself, Figure 1-B It is shown that in a machine according to the present invention, the spinning station (1) includes at least a first shrink ring or shrinker ring (2) on one of the balloons (4), and the first shrink ring or shrinker ring (2) has a certain structure in the contact line (Y) with the balloon (4) defined by points K1 and K2, so that the shape of each balloon (4) after the balloon constrained by the balloon shrink ring (2) is changed in a free and stable manner (i.e., without the need for other shrink rings), and has a new shrink shape Y', Y", Y"', Y"', Y"'... defined by points K1', K2', K1", K2", K1"', K2"', K1"", K2""..., the new shrink shape is related to the shrink shape of the shrinker ring (2), i.e., related to the shape of the contact line (Y), which is ideal for reducing tension changes during the process, preferably making the difference in the diameter of the balloon (4) as small as possible.

[0079] exist Figure 1-B In the embodiment, the annular track (12) is fixed, the spindle rail (3) moves vertically, and the height of the balloon area LB is between the output point PS of the output roller pair (9) and the ring (10) of the annular track (12).

[0080] Furthermore, in another alternative embodiment of the present invention, the annular track (12) is fixed and the spindle rail (3) moves vertically.

[0081] In addition, in a preferred embodiment, the length LY of the contact line (Y) between the shrink ring (2) and the constrained balloon (4) limited by the input point (K1) and the output point (K2) is 10 mm, 8 mm, 6 mm, 4 mm, 2 mm, or even 1 mm, and is at most 100 mm, or even at most a length equivalent to LB.

[0082] Preferably, the minimum rotation radius (X) of the contact line (Y) between the shrink ring (2) and the constrained balloon (4) limited by the input point (K1) and the output point (K2) is 5 mm to 300 mm, even greater than 300 mm for rope making or other applications, and can reach the order of magnitude of up to 800 mm.

[0083] consider Figure 1-C , which shows that Figure 1-B The same configuration, wherein a second shrink ring (21) is applied, the contact line Y1 is located on the third balloon.

[0084] consider Figure 2-AIt can be seen that, in one embodiment, the contact line (Y) limited by the input point (K1) and the output point (K2) and the length LY between the shrink ring (2) and the constrained air ring (4) has a straight line shape parallel to the rotation axis of the spindle (14).

[0085] And, optionally, in other embodiments, for example, respectively Figure 2-B and Figure 2-C In the embodiment shown, the contact line (Y) has an ascending or descending conical shape.

[0086] Likewise, in other embodiments, the contact line (Y) of the shrink ring (2) has a curved concave shape or a curved convex shape or a combination of any of the above shapes, such as Figure 2-D as shown in the example.

[0087] In any case, under Figure 1-C In an embodiment of the present invention, the spinning station (1) of the machine includes an additional second shrinking ring (21) in any balloon (4), which has a determined shape Y1 equal to or different from the shape of the first shrinking ring (2), so that the shape of each balloon (4) after the balloon constrained by the second shrinking ring (21) is changed in a free manner (i.e., without the need for a shrinking ring), having a new shape Y1', Y1" limited by the corresponding input point K1', K1" and output point K2', K2" and related to the shrinking shape of the second shrinking ring (21).

[0088] Alternatively, the spinning station (1) may comprise the aforementioned two shrink rings (2, 21) located in the same balloon (4), with the minimum spacing M between them ranging from 0.1 mm to 400 mm, or even up to LB mm, and the corresponding contact lines Y, Y1 may be identical, e.g. Figure 2-C The straight line shown in the example and parallel to the axis of rotation can also be different.

[0089] Although not shown in the figures, the spinning station (1) may include an additional third shrink ring having a defined Y-shape, so that the shape of each balloon (4) following the balloon constrained by the third balloon shrink ring can be changed in a free manner (without a shrink ring) to have a new shape associated with the third shrink ring.

[0090] Likewise, the spinning station (1) may comprise a fourth shrinking ring, a fifth shrinking ring or more shrinking rings or additional shrinking rings, respectively, having a defined shape, so that the subsequent balloon (4) retains its shape until it reaches the annular track (12).

[0091] In any case, preferably, the minimum distance M between the output point (K2) and the input point (K1) of the contact line (Y) of two consecutive shrink rings (2) is 0.1 mm to 400 mm, and can even reach the distance LB.

[0092] Furthermore, although it is preferred that the contact line (Y) between the input point (K1) and the output point (K2) of the shrink ring (2) is continuous, it is optional that the contact line (Y) between the input point (K1) and the output point (K2) of the shrink ring (2) is discontinuous, such as Figure 2-D As shown in the example, the friction is therefore also discontinuous, resulting in smaller friction force.

[0093] Furthermore, optionally, the distance LB (the distance between the output point of the output roller pair (9) or the yarn guide (7) and the ring (10) of the annular track (12)) during the spinning process can be changed by a device for moving the annular track (12) and / or the yarn guide (7) provided for this purpose.

[0094] Likewise, during the spinning process, the vertical position of at least one shrink ring (2) can optionally be freely varied in the area of ​​the balloon (4), for which purpose the shrink ring (2) is included in the spinning station (1) in a height-adjustable manner.

[0095] To this end, preferably, in one embodiment, the vertical position of at least one shrink ring (2) is integrated with the annular track (12), and the annular track (12) is adjustable.

[0096] Furthermore, in another embodiment, the vertical position of at least one shrink ring (2) is integrated with the spindle rail (3), and the spindle rail (3) is adjustable.

[0097] It should be pointed out that, optionally, the drafting system (5) can be followed by a compacting system (not shown) after the delivery point PS, in which case a new delivery point PS is formed for the fiber bundle.

[0098] Furthermore, in one embodiment, at least one shrink ring (2) has a joint (not shown) allowing it to be removed from its working position, thereby facilitating the replacement of a filled yarn sleeve (15) or coil with an empty one.

[0099] Furthermore, it should be pointed out that, preferably, the shrink ring (2) is in a spiral shape.

[0100] Finally, consider Figure 3 , a multi-balloon structure (4) is observed, in which the parameters defining the balloon (4) are marked, namely: the maximum diameter DM of the balloon (4), the diameter DC of the neck of the balloon (4) and its height H.

[0101] Having fully described the nature and implementation of the present invention, those skilled in the art can understand the scope of the present invention and the advantages arising therefrom without detailed description thereof.

Claims

1. A method for spinning yarn, wherein The yarn runs between the device for supplying the yarn and the yarn gathering device through the following devices: ○Tensioning device, o a twisting device having a diameter DB, and o a guiding device, consisting of an output point PS of the device for supplying the yarn and / or a yarn guide (7) or an equivalent element, the yarn gathering device (2) is connected to an actuating device, the actuating device being used to rotate the yarn gathering device (2) at a predetermined speed, so that the yarn forms a helical path with at least two balloons (4) at a point located within a distance LB corresponding to the distance between the guide device and the twisting device, the distance LB being at least three times the distance DB, It is characterized in that During the spinning process, the yarn is constrained by a first shrinkage ring (2) on one of the balloons (4), and the first shrinkage ring (2) has a certain shrinkage or shape in the contact line (Y) with the balloon (4), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the balloon shrinkage ring (2), is changed without the need for a shrinkage ring, and has a new shrinkage shape (Y', Y"...) related to the shrinkage shape of the first shrinkage ring (2), thereby reducing the change of tension during the spinning process.

2. The method for spinning according to claim 1, characterized in that The yarn gathering device includes a spindle (14) arranged on a spindle rail (3) having a sleeve (15) or a coil, and the yarn is gathered in the sleeve (15) or the coil after being twisted, and is characterized in that the twisting device includes a ring (10) located on an annular track (12), and the annular track (12) moves vertically relative to the fixed spindle rail (3).

3. The method for spinning according to claim 1, characterized in that The yarn gathering device comprises a spindle (14) arranged on a spindle rail (3) having a sleeve (15) or a coil, wherein the yarn is gathered in the sleeve (15) or the coil after being twisted, and is characterized in that the spindle rail (3) moves vertically relative to the twisting device, and the twisting device comprises a ring (10) located on a fixed annular track (12).

4. The method for spinning yarn according to any one of the preceding claims, characterized in that The contact line (Y) between the balloon and the shrink ring (2) is limited by an input point (K1) and an output point (K2), and a length LY of the contact line (Y) is between 1 mm and a length LB.

5. The method for spinning yarn according to any one of the preceding claims, characterized in that The contact line (Y) between the balloon and the shrink ring (2) is limited by an input point (K1) and an output point (K2), and the minimum rotation radius (X) of the contact line (Y) is between 5 mm and 800 mm.

6. A method for spinning yarn according to any one of the preceding claims, characterised in that The contact line (Y) between the balloon and the shrink ring (2) is limited by an input point (K1) and an output point (K2), and the contact line (Y) has a straight line shape parallel to the rotation axis of the spindle (14), an ascending or descending conical shape, or a curved concave shape or a curved convex shape, or any combination of the aforementioned shapes.

7. A method for spinning yarn according to any one of the preceding claims, characterised in that During the spinning process, the yarn is constrained by a second shrinkage ring (21) on one of the balloons (4), and the second shrinkage ring (21) has a certain shrinkage or shape that is the same as or different from that of the first shrinkage ring (2) in the contact line (Y1) with the balloon (4), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the second balloon shrinkage ring (21), is changed without the need for a shrinkage ring and has a new shrinkage shape (Y1', Y1" ...) related to the shrinkage shape of the second shrinkage ring (21).

8. The method for spinning according to claim 7, characterized in that During the spinning process, the yarn is constrained by a third shrinking ring on one of the balloons (4), and the third shrinking ring has a certain shrinkage or shape in the contact line with the balloon (4), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the shrinking ring of the third balloon, is changed without the need for a shrinking ring and has a new shrinking shape related to the shrinking shape of the third shrinking ring.

9. A method for spinning according to any one of claims 7 or 8, characterised in that The distance M between the output point (K2) and the input point (K1) of the contact line (Y) of two consecutive shrink rings (2, 21) is between 0.1 mm and the distance LB.

10. The method for spinning yarn according to any one of the preceding claims, characterized in that The contact line (Y) between the input point (K1) and the output point (K2) of the shrink ring (2) is continuous.

11. The method for spinning according to any one of claims 1 to 9, characterized in that The contact line (Y) between the input point (K1) and the output point (K2) of the shrink ring (2) is discontinuous, and therefore the friction is discontinuous.

12. The method for spinning according to any one of claims 2 to 11, characterized in that During the process, the distance LB is varied by means of means for moving the circular track (12).

13. The method for spinning yarn according to any one of the preceding claims, characterized in that The vertical position of at least one shrink ring (2) is suitably varied in a free manner within the balloon region (4).

14. The method for spinning yarn according to any one of claims 2 to 13, characterized in that The vertical position of at least one shrink ring (2) is integral with the annular track (12) and is adjustable.

15. The method for spinning yarn according to any one of claims 2 to 13, characterized in that The vertical position of at least one shrink ring (2) is integral with the spindle rail (3) and is adjustable.

16. A machine for spinning yarn, comprising: a device for feeding the yarn, a yarn gathering device connected to an actuating device for rotating the yarn gathering device (2) at a predetermined speed, Tensioning device, a twisting device having a diameter DB, and a guiding device, consisting of an output point PS of the device for supplying the yarn and / or a yarn guide (7) or an equivalent element, so that the fiber structure forms a spiral path with at least two balloons (4) at a point located within a distance LB, which corresponds to the distance between the guide device and the twisting device, and the distance LB is at least three times the distance DB, Characterized in that the machine for spinning also includes a first shrinkage ring (2) for constraining the yarn on one of the balloons (4), and the first shrinkage ring (2) has a certain shrinkage or shape in the contact line (Y) with the balloon (4), so that the shape of each subsequent balloon (4), that is, the shape of the balloon located downstream of the balloon constrained by the balloon shrinkage ring (2), is changed without the need for a shrinkage ring, and has a new shrinkage shape (Y', Y"...) related to the shrinkage shape of the first shrinkage ring (2), thereby reducing the change of tension during spinning.

17. A machine for spinning yarn according to claim 16, characterised in that The machine for spinning comprises a second shrinking ring (21) on one of the balloons (4), said second shrinking ring (21) constraining the yarn, said second shrinking ring (21) having a determined shrinkage or shape in the contact line (Y1) with said balloon (4) which is the same as or different from that of said first shrinking ring (2), so that the shape of each subsequent balloon (4), i.e. the shape of the balloon located downstream of the balloon constrained by said second balloon shrinking ring (21), is changed without the need for a shrinking ring and has a new shrinking shape (Y1', Y1" ...) related to the shrinking shape of said second shrinking ring (21).

18. A machine for spinning yarn according to claim 7, characterized in that The machine for spinning comprises a third shrinking ring on one of the balloons (4), which constrains the yarn and has a determined shrinkage or shape in the contact line with the balloon (4), so that the shape of each subsequent balloon (4), i.e. the shape of the balloon located downstream of the balloon constrained by the shrinking ring of the third balloon, is changed without the need for a shrinking ring, having a new shrinking shape related to the shrinking shape of the third shrinking ring.

19. A machine for spinning yarn according to any one of claims 16 to 18, characterised in that The device for feeding yarn comprises a drafting system (5) followed by a compacting system.

20. A machine for spinning yarn according to any one of claims 16 to 19, characterised in that At least one shrink ring (2, 21) has a joint which allows it to be removed from its working position in order to replace a filled yarn sleeve (15) or coil with an empty sleeve (15) or coil.

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