JPH04213562A - Method to manufacture waywind bobbin and waywind bobbin manufactured by said method - Google Patents

Abstract

PURPOSE: To markedly increase a length of a bobbin in the direction of axial line when compared with a dimension for general purpose without increasing a thread load even at the time of winding and reeling out of a thread. CONSTITUTION: Traverse motion for twilling a thread 16 is done per section in a smaller process 24 when compared with a length 25 of a bobbin respectively, and a reciprocating feed which is comparatively slow on the whole of a thread guide eye 18 in the direction of axial line 21 of the bobbin is superimposed on this traverse motion in a short time.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention is a method for manufacturing a twill bobbin from yarn, especially spun yarn, using a yarn guide equipped with an eye that reaches the circumferential surface of the bobbin. The present invention relates to a type in which a thread guide eye is traversed in parallel to the bobbin axis relative to the bobbin in order to do so. The invention furthermore relates to a twill bobbin manufactured according to this method.

0002

BACKGROUND OF THE INVENTION The construction of twill bobbins for processing steps such as weaving, knitting, double twisting, twisting, dyeing, etc. has been significantly advanced for the spinning range, and For universal bobbin lengths up to .4 cm and bobbin diameters up to 320 mm, the basic technical construction problems have now been largely solved. However, on the other hand,
Problems can arise if it is desired to enlarge the winding and produce it in larger lengths, especially in the direction of the bobbin axis, in order to perfect the handling, especially in automatic machines, and on the other hand, problems can arise with conventional bobbin structures. However, if the bobbin unwinding conditions, which increase with speed, can no longer be optimally met, and this results in a corresponding unwinding error, then
Problems may arise. Due to the bobbin stroke, which increases with bobbin length, the thread loads during winding, ie during the manufacture of the twill bobbin, and during the withdrawal of the thread from the twill bobbin in further processing become increasingly problematic.

During the winding of thread, the thread is always guided over the entire length of the cross-wound bobbin by means of a grooved drum or by means of thread guides. For example, if the winding operation is carried out with a winding speed of 1800 m/min and a bobbin stroke of 150 mm, the yarn traversing frequency is approximately 50 times per second at a conventional yarn traversing angle of 28°. In other words, the thread is reciprocated approximately 25 times per second. The greater this stroke, the more critical the thread has at the point of reversal, ie on the side of the bobbin, and the greater the load on the thread. Also, a clean configuration of the edges or sides of the bobbin becomes increasingly difficult as the distance the thread must travel from the center to the left and right increases. The result is a grooved bobbin with flying threads, an alternation of tension,
Damaged pieces of thread at the edges and the like result.

A major problem also occurs during thread withdrawal. When drawing out the thread, the surface friction applied to the thread from the bobbin is
It becomes larger as the bobbin length increases in the axial direction. In practice, the larger the traverse stroke, the more difficult it becomes to reliably draw the thread from the bobbin, especially for thin threads. This results in tangles, snags, pulled-out thread loops and thread breaks.

[0005] These problems become more severe as the length of the twill bobbin increases and the speed with which the yarn is withdrawn to subsequent processing.

[0006]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to reduce the length of the bobbin, measured in the axial direction, to the dimensions commonly used today, without increasing the yarn load either during winding or when unwinding the yarn. can be significantly increased compared to
An object of the present invention is to provide a method for manufacturing a twill bobbin.

[0007]

[Means for Solving the Problems] In order to solve this problem, in the method of the present invention, the thread guide eye is traversed in parallel to the bobbin axis relative to the bobbin in order to traverse the thread. In the twill bobbin manufacturing method,
The traverse motion for traverse winding the thread is shown for each section.
The stroke is small compared to the length of the bobbin, and this short-time traversing movement is superimposed with a relatively slow reciprocating movement of the yarn guide eye as a whole in the direction of the bobbin axis.

[0008]

Effects of the Invention The method for manufacturing a twill bobbin according to the present invention enables the following. That is, the traversing movement, which is important for traverse winding the yarn, is carried out with a small amplitude compared to the bobbin length, and therefore the yarn does not move around the bobbin during general-purpose winding using a grooved drum or a yarn guide, respectively. Compared to the traverse movement that is carried out over the entire length,
Only small loads can be applied. Instead of a stroke of e.g. 150 mm in a conventional twill bobbin, according to the invention the traverse movement is a fraction of 150 mm e.g.
It has a stroke of only 40 mm, especially approximately 30 mm. And when the thread is withdrawn over a relatively small traverse stroke, correspondingly only relatively small fluctuations in the thread tension occur, i.e. compared to the unwinding of a conventional twill bobbin, in which the traverse stroke is carried out over the entire length of the bobbin in each case. This allows extremely high withdrawal speeds with more uniform yarn withdrawal forces.

According to another method of the invention, the reciprocating feed superimposed on the short traversing movement serving for traversing the yarn is carried out continuously or in stages in the amplitude of the short traversing movement. (b) In the first option, the following is possible. This means that the thread guide movement from right to left and from left to right always takes place continuously and can be controlled in such a way that the thin twill layers are formed next to each other and above each other, preferably in the form of scales. It is. This means that a narrow thread guide, for example of 30 mm, can be shifted continuously over the entire bobbin stroke and a winding can be formed by moving and overlapping thread layers.

(b) In the other option, the yarn is traverse-wound using a yarn guide with a short traverse amplitude, ie a small range of, for example, 30 mm, whereby a plurality of disk-shaped windings are formed in stages. A division is constructed. In one embodiment, these disc-shaped winding sections can be formed one after the other up to the complete bobbin diameter. In another embodiment of the invention, the twilling is staggered in such a way that small steps are placed next to each other and thus the overall bobbin structure is created. In this case, the layered windings can be offset over the entire length of the bobbin by each one (double) amplitude of a short traverse movement.

By means of the method according to the invention, the cross-winding angle of the yarn can be selected to be smaller than the conventional angles. And the fear of thread skipping can be avoided. This is because the traversing movement of the thread no longer has any disadvantageous effects due to the small stroke. It is possible to carry out different winding angles on the bobbin length, for example during hard winding for threads. In this case, within this angular range, the angle at which the yarn is actually wound is varied regularly or irregularly, thereby making it possible to break the ribbon winding. In any case, any arbitrary ribbon winding can be broken by superimposed feeding of the thread guide.

According to the invention, it is also possible to define the final bobbin shape by controlling the superimposed reciprocation of the thread guide. In this way, as already mentioned, not only can the breaking of the ribbon winding be carried out optimally, but also all possible bobbin geometries and bobbin strokes can be produced. By controlling the superimposed feeding movements of the thread guide, it is also possible to produce conical or cylindrical bobbins. This control of the thread guide, however, also makes it possible to construct a ball-like, pineapple-bobbin-like winding. Additional conicity, which is often desired for knitting, can be easily produced. Ultimately, from the perspective of the technology used, the process, edge formation,
It is possible to meet all the variations desired in practice with respect to diameter, conicity, additional conicity and the like.

The relatively slow reciprocating feed, carried out continuously or intermittently, which is superimposed on the short-term traversing movement of the yarn guide, is caused by the movement of the yarn guide or by the movement of the winding body. It can be tightened. Since the superimposed reciprocation is carried out relatively slowly, it is also possible without difficulty to carry out this movement with a bobbin that is heavier than the thread guide.

According to the invention, however, it is important to use a thread guide with an eye that is brought closer to the circumferential surface of the increasing bobbin. This is because the thread extends freely between the eye and the circumferential surface only in a very short distance, for example 5 to 10 mm, and the known balloons cannot be formed with a bobbin on a grooved drum. In other words, the running yarn can be traversed very precisely in a relatively small traversing stroke according to the invention, and the yarn guide or its eye can be moved at high speeds. This is because in this case the thread guide or its eye only has to advance a small distance.

In order to produce small strokes, the thread guide can be reciprocated in the respective traversing cycle in a wide variety of ways. For example, a linear drive of the thread guide in a rail guide, a drive of the thread guide (as a whole) in a thread traversing manner using a grooved drum or in a mechanically, magnetically or pneumatically driven spring tongue. Fixing the thread guide eye becomes a problem.

Another solution to the above problem is that in the twill bobbin manufactured by the method of the present invention, the distance measured in the direction of the bobbin axis or the distance between two reversal points of the yarn layer is It is characterized by its small size compared to its length. Such twill bobbins are not only easier to manufacture than conventional bobbins, but also allow for a more problem-free thread withdrawal. Due to the small traversing stroke, the tension of the drawn-off yarn hardly changes, and the thread layers are not pulled together by the drawn-off yarn. This is because the next small thread layer can only be run in a small stroke and then changes into the following thread layer. Due to this microstructure of the twill bobbin according to the invention, the overall size and therefore the macrostructure of the twill bobbin is not theoretically restricted within the framework of the task and solution.

As already mentioned, the twill bobbin according to the invention consists of individual layers, the traversing stroke of these layers being set small in the direction of the bobbin axis compared to the bobbin length. This structure of the twill bobbin further enables other configurations of the invention as follows. That is,
The first layer is configured as a signal winding at a defined point on the winding tube, preferably at one longitudinal end of the winding tube which is provided for winding the bobbin. This first yarn layer wound on the winding tube offers the possibility of generating a signal at the moment the yarn layer starts to be unwound. This signal can indicate, for example, that the bobbin is empty after unwinding a defined residual yarn length of approximately 100 m. This signal may be given by an empty winding tube section before the last thread range, e.g. by means for changing the bobbin or by other control measures, e.g. for slow machine operation or for special tasks. It is also possible to introduce some device arrangement for this purpose.

Signal windings of this type are located, for example, on electrically conductive metal strips which are arranged directly on the respective bobbin winding tube. A contact contact is arranged on the metal strip, for example opposite a driving drum that drives a bobbin, which contact contact is arranged at the beginning of the unwinding of the signal winding.
A contact strip located on the winding tube is touched and the desired signal is triggered in each case. However, the form of signal generation is left to the person skilled in the art; instead of signal generation triggered by a contact, the respective circuit may also be activated contactlessly. In this case it is possible to use proximity switches, but also continuously actuated devices such as potentiometers. What is important is that for the first time in the type of winding according to the invention it has become possible to provide a signal winding on a twill bobbin. Since the windings according to the invention always move back and forth in the longitudinal direction of the bobbin only over small sections, the first winding layer also consists of individual "micro-wounds" which are juxtaposed or offset from each other. This is because As the signal winding, the first micro winding can be used during winding, and the last micro winding can be used when unwinding. Accurately working signal windings have not been possible with conventional cross-wound bobbins, since the thread is always cross-wound over the entire length of the winding tube.

[0019]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

The cross-wound bobbin shown in FIG. 1 has a cylindrical winding tube 1 and a cylindrical winding body 2 wound around the winding tube. The winding tube 1 has a signal region 3 at its longitudinal end, which signal region consists, for example, of a metal sheet;
When the bobbin is unwound, for example by contact with the support, a signal is generated indicating that, for example, only 100 m of residual thread still remain in the winding tube.

The construction according to the invention of the winding body 2 shown in FIG. 1 is characterized by individual thread layers 4 which are placed one above the other in the form of scales. This scale-like configuration is produced by continuously carrying out a relatively slow reciprocating feed superimposed on a short traversing movement of the thread. The eye (not shown in FIG. 1) that automatically feeds the thread into the bobbin has some step-back motion. This step-back motion superimposed on the short-time traversing motion is performed when the yarn guide is fed from left to right and from right to left in FIG. 1, so that the individual yarns produced by the short-time traversing motion are A scaly configuration of layers is obtained as shown.

FIG. 2 schematically shows a conical cross-wound bobbin with a conical winding tube 5 and a conical winding body 6. In FIG. The conical winding body shown in FIG. 2 consists of individual disc-shaped winding sections 7, which are connected to a thread guide which is superimposed on a short traversing movement. The round trip is
This is produced by performing the traversing movement in steps of the amplitude. FIG. 2 shows two alternative methods for this purpose. The disc-shaped winding section 7 can be wound completely in sequence, starting for example at the left end in FIG. 2, or the bobbin can be wound gradually in stages. In the latter case, the left disc-shaped winding section 7 is first wound up to the level 8 shown, then the next disc-shaped winding section 7 is wound up to the level 9 shown, and then the first level 8 is wound. , then level 9 is raised, after which the formation of the third disc-shaped winding section begins.

Finally, the first disc-shaped winding section (the one on the left in FIG. 1) is completely completed in this way, and the remaining disc-shaped winding section is designated by the reference numeral 10 in FIG. It has a high level. These levels 10 are gradually formed section by section based on the previous principles, and finally the conical winding body 6 is completed.

The basic structure of a device for carrying out the method according to the invention is shown in FIG. In this Fig. 3, the winding tube 1
The cross-wound bobbin 11 with 2 moves along a drive roller 14 with a drive 13 . In principle, the twill bobbin 11 can also have an axial drive. This axial drive, however, generally produces an approximately constant circumferential speed of the cross-wound bobbin with increasing diameter.
Desirably controlled. Axial drives are advantageous, for example, if the thread to be wound is sensitive to circumferential drives.

The thread 16 coming from any unwinding bobbin, for example a cop 15, is in the embodiment of FIG.
7 to the peripheral surface 19 of the cross-wound bobbin 11 via the eye 18 of the thread guide. In principle, the thread guide 17 can be configured as a carriage 20 so as to be movable in the direction of the arrow 23 along a guide 22 extending parallel to the bobbin axis 21 . During the movement of the carriage 20 on the guide 22, the thread 16 is traversed in a stroke 24 defined by the guide 22, which stroke is smaller than the bobbin length 25. Carriage carriage 20 in guide 22
According to the invention, the yarn guide 1 is
For example, the relatively long reciprocating movement of the carriage 2 as a whole
6 and are superimposed in the guide 27, which is located parallel to the bobbin axis 21. Depending on whether the carriage 26 is moved continuously or intermittently in the guide, the bobbin formation shown in FIGS. 1 and 2 results. Then, by controlling the carriage 26,
Any desired bobbin configuration can be obtained in each case. The thread guide 17 with guide elements shown in FIG.
This is merely one example, and any configuration of the thread guide is of course possible. In particular, the movement superimposed on the short-time traverse movement of the carriage 20 using the carriage 26 can be achieved by driving the traverse bobbin 11 itself appropriately.
4 can also be implemented. What is important is simply the independent superposition of both movements.

[Brief explanation of the drawing]

1 shows a cylindrical cross-wound bobbin with individual yarn layers lying one above the other in scales and produced by a short traversing movement; FIG.

2 shows a conical cross-wound bobbin constructed from individual disc-shaped winding sections; FIG.

FIG. 3 is a diagram showing the principle of an apparatus for carrying out the method for producing a twill bobbin according to the present invention.

[Explanation of symbols]

Claims (9)

[Claims] 1. A method for manufacturing a twill bobbin (11) from yarn using a yarn guide (17) equipped with an eye (18) reaching the circumferential surface (19) of the bobbin, the method comprising: (15) in which the thread guide eye is traversed in parallel to the bobbin axis (21) relative to the bobbin; The bobbin length (2
5) with a smaller stroke (24) than in step 5), and superimpose a relatively slow reciprocating movement of the yarn guide eye (18) as a whole in the direction of the bobbin axis (21) on this short-time traversing movement. A method of manufacturing a twill bobbin, characterized by: 2. The method according to claim 1, wherein the reciprocating feeding is carried out continuously. 3. The method according to claim 1, wherein the reciprocating feed is controlled intermittently. 4. The method as claimed in claim 1, wherein between each two carriages a disc-shaped winding section is constructed at least in part with a length corresponding to a short traverse movement. 5. Claims 1 to 4, wherein the reciprocating feed is carried out by a carriage having an amplitude of a short traverse motion.
The method described in any one of the above. 6. The method according to claim 1, wherein the final bobbin shape is defined by controlled slow reciprocating feeding. 7. A twill bobbin manufactured based on the method according to any one of claims 1 to 6, comprising:
Stroke (2) measured in the direction of the bobbin axis (21)
4) Or the distance between the two reversal points of the yarn layer is
A twill bobbin characterized by being smaller than the bobbin length (25). 8. The yarn layer according to claim 7, wherein the thread layer located directly on the bobbin winding tube between the two reversal points is configured as a signal winding at one longitudinal end of the winding tube. Twill bobbin. 9. An electrically conductive strip is located directly on the bobbin winding tube below the signal winding, and the electrically conductive metal strip is provided with a conductive strip when the bobbin winding strip located on the metal strip is unwound. 9. A double-wound bobbin as claimed in claim 8, wherein the contacts for contacting the metal strip and triggering the signal are arranged oppositely.