EP1118702A2 - Method for treating yarn and bobbin for carrying out the method - Google Patents

Abstract

For processing yarns, they are wound around the core of a bobbin. The bobbin, or an assembly of bobbins, is placed in an appts. where a treatment fluid can flow at and/or through them. The dia. of the bobbin core decreases before and/or during the treatment process. The bobbin core dia. decreases by 3-25% as the wound yarn shrinks around it during the treatment process, before drying. The yarns are wound around the bobbin core with a winding density of 160-450 g/l and pref. 290-450 g/l. The yarn is wound around the bobbin core in parallel coils, especially with a cylindrical bobbin core. A number of yarns are wound simultaneously around the bobbin core in parallel coils, using 20-200 yarns. The dimensions of the bobbin core give an axial length:dia. ratio of 1:1 to 1:3 and pref. 1:1.5 to 1:2.5. An Independent claim is included for a bobbin with a bobbin core (2) which has an initial dia. (D1) which is reduced to a smaller dia. (D2) after the yarn treatment process by the yarn shrinkage. Preferred Features: The bobbin core dia. reduction is imposed before and/or during the yarn treatment process on the bobbin core and/or its mantle, to a dia. (D2) which is 97-75% of the original core dia. (D1). The bobbin core (2) is a hollow cylindrical body, where at least one end section (4) of its axial length overlaps the other end section (5), so that the two end sections (4,5) have movement in relation to each other over the axial length of the bobbin core. The hollow cylindrical bobbin core (2) can have a reversible distorting zone to give the dia. reduction from the yarn shrinkage, which reasserts into the original core dia. after use when the processed yarns have been unwound. The distorting zone is in a V-shape which shifts radially inwards, and the core mantle can carry 2-10 distorting zones in an equal distribution around its mantle. A bobbin flange (8,9) is at each end of the bobbin core (2), of a larger dia. than the core. At least one flange (8) can be detached from the core (2). At least one axial stiffening strut (10) is within the core (2) to hold the flange (8). The bobbin core (2) can be in a braided wire structure, with ring-shaped stiffeners, where the start dia. (D1) of each stiffener can be reduced to the smaller dia. (D2) as the processed yarns shrink. The outer surface of the bobbin core (2) has at least one additional structured retainer, to prevent an axial shift of the wound yarns around the core.

Description

The present invention relates to a method for treatment of yarns, in particular for pretreatment, dyeing and / or for drying bulk yarns with the characteristics of the generic term of claim 1 and a device for performing of such a process.

For yarns, especially bulk yarns, made from native fibers, synthetic To treat fibers and / or blended fibers thereof, preferably pretreating and / or dyeing, it is known such yarns are very gentle with regard to the structural development to process in so-called strand treatment processes. For this these skeins are then only loosely tied into the respective Treatment fleet suspended so that by the treatment occurring thermal and / or hydrothermal Influences the desired structure development, usually is also referred to as building development can. However, such strand treatments are extremely personal and expensive.

It is to avoid the strand treatment described above known from DE 42 21 352 A, the yarns described above, especially the bulky yarn, wound on spools and such Then color the bobbin accordingly, taking it at the known method for achieving a uniform Structural development and level coloring is required the winding density to a value between 160 g / l and 280 g / l reduce and at the same time ensure that a fairly low one Differential pressure is applied to the actual yarn package. With in other words, in the known method, a quite loosely set winding of the yarn to be dyed created an extremely low differential pressure so that unwanted Channel formations in the winding coil and the associated coloring problems, such as irregularities and / or color sequences, not with the required security can be turned off.

The object of the present invention is a method of the specified type with which particularly reproducible yarns, especially bulk yarns, under Generation of a constant ball and not different Treatment effect can be treated.

This object is achieved by a method with the characterizing features of claim 1 solved.

The method according to the invention for the treatment of yarns, in particular for pretreatment, dyeing and / or drying of bulk yarn, provides that what is to be treated in each case Yarn is wound on a bobbin, the bobbin or in particular a plurality of coils arranged in one apparatus and there with the respective treatment fleet that both a liquid and air and / or an air-steam mixture can be flowed to and / or through or become. Here, the yarn in the process according to the invention wound on such a coil core, the diameter is reduced before and / or during treatment. In other words, in the method according to the invention essential feature to be seen in the fact that before and / or during treatment the diameter of the coil is reduced becomes, which has the consequence that with increasing reduction of the Bobbin diameter, the yarn wound thereon is desired Volume, i.e. develop the desired bulk can, on the one hand, without the building development through the Coil core itself is disturbed and on the other hand at the same time it is prevented that due to a loose and too loose winding during treatment a channel formation arises, which in turn affects the overall geometry of the patient to be treated Seen from a different flow or inflow of yarn and thus undesirable Would lead to treatment irregularities. Especially this uneven areas flowed through or unevenly flowed of the yarn package are by using the invention Process effectively prevented, so that the invention Process seen over the yarn wrap at one particular evenly treated and reproducibly bulked yarn performs what is a particular advantage of the invention Procedure is considered. So especially when repeated Application of the method according to the invention for treatment and especially for dyeing bulk yarns and preferably it can also be found in the case of building yarns that a relatively large amount of yarn, preferably between about 2 kg and 3.5 kg per spool varies over the entire length of one Yarn quantity no different bulk developments showed, so treated according to the inventive method Yarns showed no irregularities or color sequences. Therefore, another advantage of the method according to the invention to emphasize that by applying the invention Process large quantities of yarn in one batch while maintaining an even treatment effect and one always uniform bulk development can be processed, so that fabric made from such treated yarn can be a uniform loss of goods both with regard to the treatment effects, in particular with regard to also show the color loss, as well as the bulge development.

This is due to the fact that in the method according to the invention and / or during the treatment the diameter of the yarn winding load-bearing coil core is changed, it is here in contrast to the prior art mentioned at the beginning required the differential pressure, which is ultimately also a measure for the flow rate of the fleet through the Coil represents to set to a very low value. Of Therefore, in the method according to the invention, differential pressure values can also be used to be worked on the coil above of 0.45 bar and up to a maximum of 2 bar, whereby these differential pressure values are such values, the directly on the thread spool to be treated are measured, so that pressure losses, for example from the Equipment geometry, the pipelines, valves, deflections or additional units, such as heat exchangers or Filters that are not included in this value. this in turn leads to the fact that in the method according to the invention to be treated wound bobbin with an extremely high Fleet quantity per unit of time, especially in the case of treatments with a liquid liquor between 35 1 / kg / min to 70 1 / kg / min, can be flowed through, thereby on the one hand the levelness the treatment improved and on the other hand the necessary Treatment time is significantly reduced. Also from there it is understandable that the inventive method is essential helps make yarns, especially bulky yarns, especially treat economically.

This is due to the fact that a relatively large amount of yarn can be wound on a spool and flows through there with a relatively high fleet flow becomes, it is also explained that the inventive Procedure in addition to the use of a normal fleet ratio from 1:10 to about 1:20 also the application of a special small fleet ratio, especially the application a fleet ratio between 1: 3 to 1: 8, allowed, which is especially true for treatments with liquid liquors is particularly interesting economically and what also with State of the art is not possible.

As already explained above, in the case of the invention Process the diameter of the coil core on which the yarn is wound up before and / or during the treatment downsized. The phrase "before treatment" chosen here nothing else says that the yarn with one for each Material required tension wound on the spool core and then directly on the coil diameter a desired value is reduced so that an extreme loose winding of the yarn on the bobbin results, so that then the yarn as soon as it is exposed to the respective treatment liquor is, forming the desired shrinkage can puff. In contrast, in the method according to the invention the reduction of the coil core diameter "during the Treatment "brought about, so the yarn is also here with the tension required for the respective material the coil core wound, so that then due to the Treatment triggered shrinkage a bulge development of the yarn takes place without the bobbin core Bulk development prevented because the coil core in its Diameter adapted to this is reduced.

This can reduce the coil core diameter be brought about that over a predetermined period of time a corresponding establishment of the diameter during the Treatment is reduced. However, it is particularly suitable in the method according to the invention, if the yarn on a such a coil core is wound, the diameter due the shrinkage of the yarn caused by the treatment is reduced, so that depending on the respectively by the thermal and / or hydrothermal treatment brought about Shrinkage automatically required diameter reduction he follows.

It is particularly suitable considering a maximum and more uniform bulky development when the inventive Process the yarn to be treated on a such a coil core is wound, the diameter between 3% and 25%, based on the initial diameter and / or reduced during treatment. Here could be found that particularly within the previously specified Reduction values a large part of the treated Yarns their optimal bulge during the treatment show without an undesirable in the corresponding winding body Channel formation has occurred.

As already stated above in the method according to the invention is, the inventive method allows extremely large Winding densities, these winding densities preferably between 160 g / l and 450 g / l and in particular between 290 g / l and 450 g / l vary. Especially when in the case of the invention Process the yarn to be treated with a high Winding density between 290 g / l and 450 g / l on the spool core reproducible treatment results can be wound up achieve with a particularly economical way of working.

In particular, it was pointed out above that the method according to the invention not only for such treatments is applicable, in which the yarn with a liquid Fleet is contacted, but also such treatments feasible according to the inventive method are in which the yarn with an appropriately tempered Air and / or an appropriately tempered air-steam mixture is treated. Here are the drying and to call the relaxation, preferably the yarn a coil core is wound, its diameter in front and / or reduced by 3% to 25% during treatment becomes.

Particularly suitable especially for coloring from the point of view It is an optimal color level if the inventive method the yarn in a parallel winding on the coil core, in particular on a cylindrical coil core, is wound up. Here it could be determined that such a parallel wound yarn package even with large Winding densities, i.e. with winding densities between 290 g / l and 450 g / l, regardless of color by using the method according to the invention could be without color irregularities or color length sequences occurred.

The term used in the present application "cylindrical coil core" includes not only the axial Length of the coil core seen such coil cores that are exactly cylindrical are and therefore a constant diameter have, but also those coil cores that have a certain Have taper, i.e. whose diameter at one end of the Coil core is larger than the diameter at the other end of the coil core, these two diameters preferably around can vary up to ± 10%.

In the case of an economically viable further training of the previous described embodiment of the method according to the invention are several yarns, especially between twenty and two hundred yarns, simultaneously in a parallel winding wound the coil core. Therefore, such After treatment and drying, bobbin directly be further processed so that the individual yarns are different Make a weaving or knitting machine, for example can be supplied without it being necessary the yarn is expensive after the appropriate treatment and drying rewind.

In a particularly advantageous development of the invention The yarn is processed on such a bobbin coiled with the ratio of axial length to Diameter between 1: 1 to 1: 3, preferably between 1: 1.5 and 1: 2.5. In other words, such Compared to conventional coils, a coil core with a relatively large inner diameter, the inner diameter in particular between about 50 mm and about 120 mm varies so that such a coil is able to a relatively large amount of yarn, especially between 2 kg and 4 kg of yarn to take up on their bobbin. Farther can open a yarn like this because of the large bobbin inner diameter with particularly large fleet quantities per Flow through unit of time so that the appropriate treatments be significantly shortened.

The present invention further relates to a coil for Implementation of the procedure described above.

The coil according to the invention for performing the method has a spool core for receiving and holding the yarn package before and / or during treatment, with the Diameter of the coil core is so variable that the One core during winding with the yarn to be treated has larger diameter D1 compared to the diameter D2 of the coil core after the treatment. In other words in the coil according to the invention, the coil core is designed in such a way that the diameter D1 of the coil core during winding to a diameter D2 of the coil core after the treatment is scalable.

All advantages of the coil core according to the invention apply, as described above in the method according to the invention are. Therefore, it enables the invention Coil over its coil core, which can be changed in diameter Treatment of yarns, especially bulky yarns, that this treatment is particularly even and reproducible regarding construction training and treatment effects can be executed. To avoid repetitions are at the beginning of the inventive method described further advantages.

Treatment in the sense of the present application should all textile-chemical Processes include, in the aqueous medium, in Air and / or be carried out in air-steam mixtures, so in particular the laundry customary in the field of pretreatment, relaxing, bleaching, crying and boiling as well dyeing and post-treatment, i.e. especially that Finishing and softening, drying and thermal Relax.

As previously described in the method according to the invention is possible with the coil according to the invention that here the previously described reduction in diameter of the Coil core forcibly during treatment by an am Coil core and / or element acting on the coil core jacket can be brought about. This means that in such an embodiment the coil according to the invention any one of externally controlled bulk of the wound on the coil core Yarn can be effected.

A particularly easy to use and for many purposes suitable design of the coil according to the invention however, provides that the diameter D1 of the coil core through the shrinkage of the yarn to be treated is reduced, so that in this embodiment of the invention Then coil a balance between the shrinking force of each Yarns and the deformation forces of the bobbin core.

Furthermore, the coil according to the invention allows that before the actual Treatment already the diameter reduction of the Coil core is brought so that the wound thereon Then shrink yarn freely during treatment and thus can develop the desired bulk, like this already described in detail above in the method according to the invention is.

In particular, the coil according to the invention is designed in such a way that the diameter D1 of the coil core before and / or during the treatment can be reduced to a diameter D2, the diameter D2 being 97% to 75% of the diameter D1. In other words, such a coil allows shrinkage of the yarn between 3% and 25%, based on the initial length of the yarn to be treated so that accordingly a graded bulge development of the treated Yarn is brought about.

To reduce the diameter of the coil core described above one looks particularly effective and easy to enable specific embodiment of the coil according to the invention that the Coil core is designed as a cylindrical hollow body, wherein at least one end section of the jacket of the cylindrical hollow body at least over a portion of its axial length the other end portion of the shell of the cylindrical hollow body overlaps so that the two end portions are relative to each other are movable. In other words, this configuration the coil of the coil core designed according to the invention that due to the overlap of the end sections and a elastic deformation of the coil core the end sections can slide over each other so that the desired Reduction of the diameter of the coil core during the treatment due to the shrinking processes that develop becomes.

Especially when there is a change in the configuration described above the specific embodiment of the invention Coil the two end sections over the entire axial length the cylindrical hollow body that forms the coil core, overlap, is the desired in a particularly simple manner Reduction of the diameter of the coil core during the treatment ensured, this reduction in diameter then is supported when the overlapping two end sections for example with a coating that reduces friction, so in particular with a Teflon coating are.

Another, specific embodiment of the coil according to the invention provides that the coil core is essentially cylindrical Hollow body is formed and that the jacket over its entire axial length at least one reversible deformation range has, which is shaped such that a reversible Deformation of the deformation area the desired Reduction of the diameter of the coil core during the treatment can be brought about. In other words, this configuration part of the jacket of the hollow body reversible during the treatment deformed, resulting in the appropriate and desired Reduction in diameter during treatment leads, so that after completion of the treatment and unwinding the then the yarn bulged on such a bobbin Area of the jacket back to its original starting position while increasing the diameter to the initial diameter D1 is returned.

To at least in the embodiment described above to provide a deformation area in the jacket of the coil core, there is the possibility of this deformation area from one special plastic that has memory properties, so that with an appropriate hydrothermal treatment inevitably the reduction in diameter described above due to the memory effect of the deformation area occurs.

In another embodiment of the coil according to the invention becomes the at least deformation area in the jacket of the coil core provided that the deformation area as a radially recessed area of the jacket is designed. With increasing shrinkage of the Such a yarn is deformed on the spool core designed deformation area in such a way that thereby the desired reduction in diameter of the coil core is brought about, being a special and preferred Configuration has at least one deformation area, the V-shaped spring back radially inwards, as follows based on a specific embodiment of the invention Coil is explained in detail.

To be particularly uniform and also relatively small Shrinking forces to reduce the diameter of the Ensure a coil core during treatment sees one further embodiment of the embodiment described above the coil according to the invention that the jacket of the Coil core two to ten, evenly distributed over the circumference Has deformation areas.

In particular, larger quantities of the yarn to be treated To be able to wind the spool according to the invention sees another Design of the embodiment of the previously described Coil according to the invention before that in this case the head on each A flange is provided at the end of the coil core, the Diameter of this flange is larger than the diameter of the Coil core. This will be before and / or during treatment or prevents during winding or unwinding especially the parallel on a cylindrical coil core wound yarn slips, so that the manageability of a such design of the coil according to the invention improved and thus time-consuming wrong productions can be avoided.

To further increase the manageability of the coil according to the invention improve, sees a further development of the embodiment described above the coil of the invention before that at least a flange releasably with the coil core, preferably with a cylindrical coil core is connected. This will ensured that, for example, when processing the at least the yarn core wound and treated a detachable flange can be removed, making one hand reduces the mass of the spool rotating during unwinding and on the other hand the unwinding accordingly the treatment of bulky yarn is facilitated.

To in the previously described embodiment of the invention Coil, which is provided with a flange on the front, ensure that this flange is also properly supported is a further embodiment of the invention Coil that at least within the coil core an axially extending stiffening strut is provided is. Especially when three such bracing struts are present, this configuration allows that at least a flange is releasably provided on the coil core without it even if the flange is loosened frequently unwanted damage to the coil.

In a further, also advantageous embodiment of the The coil according to the invention is the coil core made of a wire mesh formed, the wire mesh being annular stiffening elements has, such that the diameter D1 a each stiffening element can be reduced to diameter D2 is. After wrapping the wire mesh with the one to be treated So the wire mesh itself and yarn reversibly deform the stiffening elements so that the shrinking force of the yarn wound on it is sufficient, to achieve the desired reduction in diameter during treatment bring about.

To before and / or during the treatment of the yarn on the invention Coil an undesirable axial sliding of the yarns wound in parallel on the spool core prevent sees a particularly advantageous embodiment of the Coil according to the invention before that here on the surface of the Coil core, which is preferably cylindrical, additional support elements for the yarn are provided. These additional mounting elements can be used, for example be made available by the outer casing of the coil core has a certain roughness or that on the outer shell of the coil core facing radially outwards Projections are arranged so that an axial displacement of the yarn wound on the bobbin effectively prevented becomes.

As has been repeatedly pointed out above, the coil according to the invention preferably has a cylindrical one Coil core, in particular in a parallel winding is wound with the yarn to be treated.

Advantageous further developments of the method according to the invention and the coil according to the invention are in the subclaims specified.

Figur 1

eine schematische perspektivische Abbildung einer ersten Ausführungsform der Spule;

Figur 2

die in Figur 1 abgebildete Ausführungsform, jedoch unter einem anderen Blickwinkel;

Figur 3

eine schematische perspektivische Ansicht einer zweiten Ausführungsform;

Figur 4

eine schematische perspektivische Abbildung einer dritten Ausführungsform;

Figur 5

die schematische Abbildung der in Figur 4 gezeigten dritten Ausführungsform, jedoch unter einem anderen Blickwinkel;

Figur 6

eine schematische perspektivische Ansicht einer vierten Ausführungsform; und

Figur 7

eine schematische Abbildung einer fünften Ausführungsform.

The coil according to the invention is explained in more detail below using five embodiments in conjunction with the drawing. Show it:

Figure 1

a schematic perspective illustration of a first embodiment of the coil;

Figure 2

the embodiment shown in Figure 1, but from a different angle;

Figure 3

a schematic perspective view of a second embodiment;

Figure 4

a schematic perspective illustration of a third embodiment;

Figure 5

the schematic illustration of the third embodiment shown in Figure 4, but from a different angle;

Figure 6

a schematic perspective view of a fourth embodiment; and

Figure 7

is a schematic illustration of a fifth embodiment.

In Figures 1 to 7, the same parts with the same reference numerals Mistake.

The first embodiment shown in FIGS A total of 1 coil has one as a cylindrical Hollow body designed coil core 2, the Sheath of the coil core 2 in Figures 1 and 2 partially only is shown. There are a large number in the jacket of the coil core 2 of fleet passage openings 3 provided, of which only some examples are shown. The core of the coil 2 has an outer end portion 4 and an inner one End section 5, with both end sections 4 and 5 overlap as best seen in Figure 1. Conditionally in that the two end sections 4 and 5 are not rigid are connected to each other but only overlap, can the embodiment shown in Figures 1 and 2 Coil 1 reduce its diameter D1 to a diameter D2, if a yarn is wound on the spool core 2, which has a certain shrinkage force with a corresponding hydrothermal Owns treatment. This reduction in diameter is shown accordingly in FIG. 1. With this reduction in diameter shift the outer end portion 4 in Arrow direction 6 and the inner end portion 5 in the arrow direction 7, which says nothing else, that the end sections at such a reduction in diameter over another Overlap area.

Furthermore, the coil core 2 with a head-side flange 8 and a base-side flange 9, both flanges are circular, from the flange 8 on the head side however, only a corresponding section is shown for clarification is.

Inside the coil core 2 are three distributed over the circumference axially extending stiffening struts 10 are arranged, on the foot side the bracing struts 10 attached to the lower flange 9 are. The bracing struts 10 are on the head side a ring element 11 connected, the ring element 11 with an external thread 12 is provided.

One adapted to the ring element 11 and in the upper flange 8 provided recess 13, which on its to the ring element 11th facing surface has a corresponding thread, serves together with the ring element 11 for detachable mounting of the upper one Flange 8, such that the flange 8 on the ring member 11th can be screwed on and unscrewed from the ring element 11.

Now the coil 1 shown in FIG. 1 and in FIG. 2 is to be closed a coil column are arranged, this coil column comprises a plurality of coils arranged one above the other, so serves a receptacle 14 provided on the lower flange 9, the with a correspondingly shaped counterpart 15, which over the protrudes upper flange 8, that a float-tight connection of the neighboring coils is ensured.

For the sake of completeness, it should be noted that the receptacle 14 in Figure 2 and the counterpart 15 in Figure 1 only partially shown are, with the receptacle 14 and the counterpart 15th Extend annularly over the entire circumference of the flange 9 or 8.

The first embodiment shown in FIGS Coil 1 is used as follows:

First, the bobbin 1 in a suitable winding station provided with a parallel winding of the yarn to be treated, the two flanges 8 and 9 prevent this parallel winding slips off the core 2. At this time the coil core 2 still has a diameter D1. After this a large number of coils 1 have been wound in the above sense a column of coils is placed one above the other, such that adjacent coils on the receptacle 14 and the counterpart 15 are connected to each other in a fluid-tight manner, so that over this connection area in particular also no fleet from Can flow inside the coil to the outside or vice versa. Around Such a fluid-tight even at particularly high differential pressures Ensure arrangement of adjacent coils exists the possibility of receiving 4 and / or the counterpart 15 an additional seal, in particular an axially compressible Lip seal, to be assigned.

After inserting a column into an appropriate treatment device the treatment is carried out in parallel on the cylindrical Bobbin 2 wound yarns such that the fleet is pumped into the interior 16 of the coil core 2 and from there through the passage openings 3 that wound on the coil core 2 Flows through yarn. Due to the occurring here hydrothermal treatment shrinks the yarn and develops a bulge, which leads to the end sections 4 and 5 in the direction of arrows 6 and 7 on top of each other move so that the diameter of the coil core 2 is reduced to size D2.

There is also a change of fleet direction during treatment possible, such that the fleet from the outside in through the is pumped on the bobbin 2 wound yarn.

After the respective treatment has ended, the Column of the coils 1 arranged one above the other in the treatment apparatus removed and fed to an unwinder, wherein previously to facilitate peeling the parallel-wound Yarn the upper flange 8 is unscrewed.

As can best be seen from FIG. 1, the jacket of the Coil core 2 only on a single stiffening strut 10 by means of two spacers 17 attached. This type of attachment ensures that the diameter reduction previously described of the coil core 2 with a relatively small force is feasible.

The second embodiment of the total shown in FIG Coil labeled 1 differs from that previously described and the first embodiment shown in Figures 1 and 2 basically only in the way of fastening the top Flange 8. Here are in the upper flange 8, the releasable is arranged on the coil core 2, for each bracing strut 10 a recess 18 is provided, the recess 18 being such is shaped so that it has a first, enlarged recess area 18 a and an associated narrowed recess area 18 b owns.

In order to attach the upper flange 8 to the coil core 2, the upper flange 8 is thus relative to the three bracing struts positioned that an upper portion 10 a Bracing struts 10 protrude into the enlarged recess 18 a. By rotating the upper flange 8 in the opposite direction the upper section 10 a then comes to the direction of the arrow 19 each stiffening strut 10 in a position as in Figure 3 is shown. In this position is then due to a Clamping engagement between the section 10 a and the section 18 b the upper flange 8 is fixed to the coil core 2. For removal the upper flange 8 then only requires one rotation in the direction of arrow 19.

The use of the second embodiment shown in Figure 3 the coil 1 is like the use of the previously related with Figures 1 and 2 described first embodiment. Therefore, to avoid repetitions on the referenced above in this regard.

The third embodiment shown in FIGS. 4 and 5 differs differs from the embodiment shown in Figures 1 and 2 only through the design of the coil core 2. Here, the coil core 2 is the third embodiment over its circumference with eight evenly distributed deformation areas 20 provided, each deformation region 20th V-shaped is designed to jump inwards. Based on these Deformation areas 20 is the diameter of the coil core from its original value D1 can be reduced to a diameter D2, being during this downsizing that during treatment of the wound on the cylindrical core 2 Yarn occurs, the legs 20 a and 20 b of each deformation area 20 are displaced in the direction of arrow 21.

Also in the third embodiment shown in Figures 4 and 5 the upper flange 8 is detachably arranged on the coil core 2, the releasable arrangement of the Flange 8 is designed as already in the the embodiments shown in Figures 1 and 2 is explained. Therefore, the relevant embodiments for Avoid repetition referenced.

The fourth embodiment of the overall depicted in FIG with 1 designated coil corresponds in terms of design of the coil core 2 of the previously in connection with Figures 4 and 5 described third embodiment, but different to this third embodiment shown in FIGS. 4 and 5 the fourth embodiment according to Figure 6 an attachment of the upper flange 8, as previously mentioned of the second embodiment shown in FIG. 3 is. Therefore, the explanations apply to those depicted in FIG. 6 fourth embodiment as described above of the coil core 2 based on that shown in Figures 4 and 5 third embodiment and in terms of releasable attachment of the upper flange based on the second shown in Figure 3 Embodiment are described in detail.

For all previously described and shown in Figures 1 to 6 Embodiments is noted that the coil core 2 from a stainless steel sheet with a thickness between 0.2 mm and 2 mm or from an elastic plastic material in one comparable strength is made.

The last embodiment of the total shown in FIG Coil labeled 1 differs from those previously described and the embodiments shown in FIGS. 1 to 6 to the extent that here the coil core 2 from a Wire mesh is formed, the wire mesh being annular Has stiffening elements 30. Here everyone has Stiffening element 30 a plurality of V-shaped inwards deformed deformation areas 31, such as these the best enlarged detail view can be seen. Because that the legs 31 a and 31 b of each deformation area can be moved towards each other like this by the Arrows is indicated, the diameter of the ring-shaped Stiffening element with a corresponding movement, the triggered by the shrinking force of the yarn, reduced, so that the yarn wound on such a bobbin is a desired one and can experience controlled building development.

So that the previously described reduction in the diameter of the Stiffening element can run, the legs 32 are the predominantly axially extending webs in corresponding Guides 33 stored, as best shown in the enlarged Detail view can be seen.

The wire mesh is preferably made of stainless steel wires made with a diameter between 1 mm and 3 mm.

Claims (23)

Process for the treatment of yarns, in particular for the pretreatment, for dyeing and / or drying bulk yarn, in which the yarn is wound onto the core of a bobbin, after that the coil or a plurality of coils arranged in one apparatus and there with the respective treatment fleet and / or is flowed through, characterized in that the yarn is wound on such a coil core, the diameter is reduced before and / or during treatment. A method according to claim 1, characterized in that the Yarn is wound on such a bobbin, the Diameter due to the treatment caused Shrinkage of the yarn is reduced. A method according to claim 1 or 2, characterized in that that the yarn is wound on such a bobbin, whose diameter is between 3% and 25%, based on the Initial diameter, reduced before and / or during treatment becomes. Method according to one of the preceding claims, characterized characterized in that the yarn to be treated with a winding density between 160 g / l and 450 g / l, preferably with a Winding density between 290 g / l and 450 g / l, on the spool core is wound up. Method according to one of the preceding claims, characterized characterized in that the yarn is wound on such a bobbin is, the diameter of which before drying a value between 3% and 25%, based on the initial diameter, is reduced. Method according to one of the preceding claims, characterized characterized in that the yarn in a parallel winding on the Coil core, especially on a cylindrical coil core, is wound up. Method according to claim 6, characterized in that several Yarns, especially twenty to two hundred yarns, at the same time wound in a parallel winding on the coil core become. Method according to one of the preceding claims, characterized characterized in that the yarn is wound on such a bobbin is where the ratio of axial length to Diameter between 1: 1 to 1: 3, preferably between 1: 1.5 and 1: 2.5. Coil for performing the method according to one of the preceding Claims with a coil core for receiving and holding of the yarn package during the treatment, characterized in that that before and / or during the treatment of the diameter of the coil core (2) can be changed such that the coil core (2) when wrapping the yarn to be treated has larger diameter D1 compared to the diameter D2 of the coil core (2) after the treatment. Coil according to claim 9, characterized in that the Diameter D1 of the coil core (2) due to the shrinkage of the treating yarn is to be reduced. Coil according to claim 8 or 9, characterized in that the reduction in diameter of the coil core (2) is compulsory before and / or during treatment by a on the coil core (2) and / or element acting on the coil core jacket can be brought about is. Coil according to one of claims 8 to 11, characterized in that that the diameter D1 of the coil core (2) before and / or can be reduced to a diameter D2 during the treatment which corresponds to 97% to 75% of the diameter D1. Coil according to one of claims 8 to 12, characterized in that that the coil core (2) as a cylindrical hollow body is formed and that at least one end portion (4) of the Jacket of the cylindrical hollow body at least one Part of its axial length the other end section (5) of the jacket of the cylindrical hollow body overlaps such that the two end sections (4, 5) are movable relative to one another are. Coil according to claim 13, characterized in that the two end sections (4, 5) over the entire axial length of the cylindrical hollow body overlap. Coil according to one of Claims 8 to 14, characterized in that that the coil core (2) as a substantially cylindrical Hollow body is formed and that the jacket over its entire axial length is at least one reversible Deformation area (20) which is shaped such that through a reversible deformation of the deformation area (20) the desired diameter reduction before and / or during the treatment can be brought about. Coil according to claim 15, characterized in that the deformation area (20) as radially recessed Area of the jacket is designed. Coil according to claim 16, characterized in that the deformation area (20) V-shaped spring back radially inwards. Coil according to one of Claims 15 to 17, characterized in that that the coat two to ten, evenly over the Has circumferentially distributed deformation areas (20). Coil according to one of claims 9 to 18, characterized in that that on the head side at each end of the coil core (2) Flange (8, 9) is provided, the diameter of which is larger than the diameter of the coil core (2). Coil according to claim 19, characterized in that at least a flange (8) detachably connected to the coil core (2) is. Coil according to claim 19 or 20, characterized in that at least one axially extending inside the coil core (2) Bracing strut (10) for holding the flange (8) is arranged. Coil according to one of Claims 9 to 12, characterized in that that the coil core (2) from a wire mesh is formed that the wire mesh (30, 32) is annular Stiffening elements (30) and that the diameter D1 of each stiffening element (30) to the diameter D2 is scalable. Coil according to one of claims 9 to 22, characterized in that that the surface of the coil core (2) with at least an additional support element for the yarn to prevent the axial displacement of the same is provided.

Images