DE4009370A1 - Bobbin cross winding allowing longer bobbins to be wound - in which reciprocating motion cross-wise has sections with only one stroke smaller than bobbin length - Google Patents

Abstract

To wind a cross wound bobbin, partic. with spun fibre yarn, the reciprocating motion to lay the yarn (16) crosswise has sections with only one stroke (24) which is smaller than the bobbin length (25). This reciprocating movement for a short period is overlaid by a total relatively slower forwards and backwards shift of the yarn guide eyelet (18) in the direction of the bobbin axis (21). The reciprocating movement is effected continuously, or given a controlled intermittent action. Between every two steps, the bobbin is partially built up at least by a length matching the amplitude of the reciprocating yarn movement during the short period. The reciprocating movement is carried out in steps broadly matching the amplitude of the stroke motion during the short periods. The final bobbin shape is determined by control of the slow forwards and backwards shifts. ADVANTAGE - The method allows longer bobbins to be wound, without increasing the load on the yarn either on winding or unwinding.

Description

The invention relates to a method for producing a cheese from Yarn, especially spun yarn, with the help of a to the mantle che of the bobbin approaching eyelet having thread guide, in which for the cross-laying of the yarn, the thread guide eyelet relative to Cross-wound bobbin is parallel to the bobbin axis. It also affects a cheese made by the process.

The construction of packages for processing processes in weaving, Knitting, double wire twisting, dyeing etc. is also for the Spun fiber range so advanced that for common spools lengths of up to 10 inches (25.4 cm) and coil diameters of up to 320 mm basically technical construction problems are currently mostly solved are. Difficulties can arise on the one hand if the Spu steering body enlarged, in particular with greater length in the direction of Coil axis should be made to handle, especially at automatic machines, to improve, and on the other hand, if the bishe spool build-up, the speed-related increase in spool flow conditions can no longer optimally meet, so that corresponding Ab running errors occur. Due to the coil stroke increasing with the coil length is the thread stress both when winding, ie when manufacturing the Cross-wound bobbin, as well as when pulling thread from the bobbin in the forwarding work increasingly problematic.

When winding the yarn, it always crosses over the full stroke spool guided, either by a grooved drum or with the help a thread guide. For example, if you set a winding speed of 1800 m / min with a spool stroke of 150 mm, then the Chan Yaw frequency of the yarn at a normal crossing angle of the threads of 28 ° approx. 50 × per second, i.e. the thread becomes approx. 25 × per second flung back and forth. The larger the stroke, the more critical it behaves  the thread at the deflection points, i.e. on the flanks of the bobbin, and the greater the strain on the thread. Also a clean build the edges or coil flanks become more and more difficult the larger the stroke is the path over which the thread goes from the center to the left and right got to. The consequences are jumpers, grooved coils, voltage changes, be damaged pieces of thread on the edges and the like.

Significant problems also arise with thread withdrawal. Here, the surface friction exerted by the bobbin on the thread with the in Axis direction measured coil larger. From practice it is known that especially with finer yarns it is becoming increasingly critical for the thread, for sure run off the spool, the larger the stroke. There are tangles Interlocking, pulled thread loops and thread breaks.

These problems become more and more drastic the longer the cheese gets, and the faster the thread in the subsequent processing processes is subtracted.

The invention has for its object a method for manufacturing to create a package, preferably for the staple fiber area, that it can be used both when winding and without increasing the thread load allowed when pulling the yarn, the bobbin length measured in the axial direction ge significantly larger than the usual dimensions today.

For the procedure of the type mentioned above, in which for the crosswise Ab place a thread guide eyelet relative to the bobbin parallel to the bobbin lenachse is oscillated, the solution according to the invention is that the traversing for crosswise laying down of the yarn in sections only on a stroke that is relatively small compared to the coil length, and that this short periodic oscillation movement is a relative overall  the thread guide eyelet is slowly pushed back and forth towards the cross coil axis is superimposed.

By the invention it is achieved that for the crosswise depositing of the Yarn essential traversing movement on a compared to the bobbin length small amplitude is executed and therefore a lower load the yarn exerts than that of conventional spools with a grooved drum or Thread guide each traversing movement over the entire bobbin length. Instead of a stroke of, for example, 150 mm in a conventional cheese According to the invention, the traversing movement only has a fraction of the 150 mm, e.g. B. 10 to 40 mm, in particular about 30 mm. When the yarn runs out over the relatively small traverse stroke arise accordingly relatively small jumps in thread tension, that is, they are exceptional Extremely high take-off speeds possible, with more even thread tensile forces than when the previous packages on which the Chan yaw stroke extends over the entire coil length.

According to a further invention, the one for cross-laying the yarn serving, short periodic oscillating movement superimposed back and forth thrust continuously or with steps of the order of magnitude de the short periodic oscillation movement are carried out:

• a) In the first alternative it is possible to change the thread guide movement of right to left and left to right continuously like this to control that thin cross layers side by side and on top of each other, preferably scale-like. That means that tight thread guidance from z. B. at 30 mm continuously over the entire stroke the bobbin shifted and by wandering, overlying layers of thread the bobbin can be built.  
• b) In the other alternative, the thread is in small areas with the Amplitude of the short periodic oscillating movement, that is, for. B. about 30 mm, laid by thread guide so that the bobbin wafers are gradually opened be built. These coil disks can be designed in one embodiment each other up to the full coil diameter. In a yet another embodiment of the invention, the crossing should be relocated that small steps are placed next to each other and thus the entire coil structure result. So it can be layered Turn by one (double) amplitude of the short period Traversing movement can be offset over the total stroke of the spool.

The procedure according to the invention makes it possible to cross the intersection choose the angle of the yarn smaller than usual. The danger of the company The skipper has been eliminated because the thread spinning movement is due to the small strokes can no longer be disruptive. It can also ver different crossing angles, e.g. B. in hard coils for dyeing on the Length of the coil can be provided. Within this angular range then the actually set angle regularly or irregularly changed to create an image disturbance. In any case, by the superimposed feed of the thread guide generates any image disturbance will.

According to another invention, the final coil shape can also be made Control of the superimposed forward and backward advance of the thread guide men. In this way, as I said, not only image disturbances can be optimal brought about, but also all possible coil shapes and strokes be put. One can control the superimposed feed movement of the thread guide produce conical or cylindrical bobbins Control of the thread guide also allows ball-shaped, to build pineapple-coil-like bodies. One for knitting  The desired additional taper is easy to produce. From application From a technical point of view, the Ver according to the invention offers finally drive the opportunity to meet all the variations that be apt stroke, edge structure, diameter, taper, additional taper and the like are desired in practice.

That overlayed the short periodic traversing movement of the thread guide continuously or discontinuously executed, relatively slow and feeding can be done either by moving the thread guide or but caused by movement of the bobbin. Since the overlaid back and forth is relatively slow, it is without further possible this movement from the heavy relative to the thread guide To let the coil run.

It is important, however, according to the invention, a thread guide to the man to use the surface of the growing coil because the Only a very short yarn between the eyelet and the outer surface Range of z. B. 5 to 10 mm runs freely and one of the coils Groove drums known balloon can not form. The running yarn can therefore be used on the relatively small traverse stroke according to the invention of extraordinary accuracy, and the thread guide or his Eyelets can travel at high speed because of only a small stroke must be relocated.

To create the small stroke, the thread guide can be very different To be moved back and forth with the respective traversing period For example, a linear drive of the thread guide in one question Rail guide, a drive of the thread guide (as a whole) according to Art the yarn maneuvering with a grooved drum or a fastening of the thread guide reröse at the free end of a mechanical, magnetic, pneumatic etc. he  excited tongue.

Another solution to the above problem is in the after the procedure Ren manufactured packages, characterized in that the direction traversing stroke measured on the coil axis, i.e. the distance between two Reversal points of a layer of yarn that is small against the bobbin length. A sol che spool is, as explained, not only easier than previous spu len to produce, but also easier to pull off. Because of the little one Changierhubs hardly fluctuates the thread tension of the drawn yarn, and entrained layers of yarn cannot occur because the next small one Yarn layer runs only on the small hub and then to the next one Yarn layer changes. Because of this microstructure of the invention The package is its total size, i.e. the macro structure, within the scope of Theoretical and unlimited task and solution.

A cheese according to the invention consists - as I said - of individual layers, whose traversing stroke in the direction of the coil axis is small against the coil length is. This structure of the package enables further expansion staltung of the invention in that the first layer or the first Layers at a certain point on the sleeve, preferably along a length end of the sleeve provided for winding the coil, as a so-called Sig nal winding are trained. This first applied to the sleeve This is because yarn layer offers the possibility of a signal at that moment in which the thread layer is started to be processed. This signal can indicate that the coil, after a certain remaining one Yarn length, from e.g. B. about 100 s, has run empty. The signal can go through the empty sleeve part before the last yarn area and can take measures to change bobbins or other taxes measures, e.g. B. slow machine running or positioning any of a device for special tasks.  

A signal winding of the type described is, for example, on a electrically conductive metal strips directly on the respective spu len sleeve. A touch contact, e.g. B. on a Coil driving drive roller, to be contrasted with that at the beginning the course of the signal winding with the Kon located on the sleeve clock strip comes into contact and the desired signal from solves. The type of signal generation is, however, left to the person skilled in the art sen, instead of the signaling triggered by touch contact each circuit can also be activated without contact. Annä come switch, but also continuously operating facilities such as Potentiometer in question. It is only essential that it is in the fiction according to the type of winding is possible for the first time in the case of a package To provide signal winding, because the winding according to the invention always only goes back and forth over small sections in the longitudinal direction of the coil, so that also the first winding layer from individual juxtaposed or scaled "micro-windings" exists. The signal winding can then use the first micro winding when winding or the last micro winding be drawn. Exactly working signal winding could be achieved with conven Lichen packages are not provided because the thread always on the entire length of the sleeve was placed.

Based on the schematic representation of exemplary embodiments Details of the invention explained. It shows

Figure 1 is a cylindrical cheese with scales one above the other, made by short periodic traversing yarn single layers.

Fig. 2 is a conical cheese made of individual discs and

Fig. 3 shows the principle of a device for executing the inventive cheese winding method.

The cross-wound bobbin of Fig. 1 comprises a cylindrical sleeve 1 and a cylindrical coil bobbin 2 wound thereon. The sleeve 1 has at one longitudinal end a signal area 3 , the z. B. can be made of a metal foil and when the coil expires by contact, for. B. with a circulation, can give a signal that says that only a remainder of, for example, 100 m of yarn is on the sleeve.

The structure of the bobbin 2 according to the invention according to FIG. 1 is characterized by individual layers of yarn 4 lying one above the other in a scale-like manner. This scale-like structure arises from the fact that the short periodic movement intended for cross-laying of the yarn Changierbewe movement superimposed or relatively slow back and forth is performed Lich. The eyelet that automatically feeds the yarn to the bobbin (not shown in FIG. 1) then executes a pilgrim step movement to a certain extent. Since this pil-step movement superimposed on the short-periodic oscillation occurs both when the thread guide is fed from left to right in FIG. 1 and from right to left, the herringbone-like scale structure of the individual yarn layers produced by the short-periodic oscillation movement is shown schematically.

In Fig. 2, a conical cheese with a conical sleeve 5 and a conical bobbin 6 is shown schematically. The conical spool body according to FIG. 2 consists of individual spool disks 7 , which are created by the fact that the back and forth of the thread guide, which should be superimposed on the short periodic oscillating movement, is executed with steps in the order of magnitude of the amplitude of the oscillating movement. Two alternatives are indicated in FIG. 2. Either the coil disks 7 in order, for. B. begin at the left end of Fig. 2, completely built up, or the coils are gradually ge gradually spooled by first the left coil disk 7 up to the indicated Ni level 8 , then the next coil disk 7 to the indicated level 9 and afterwards only the level 8 and then the level 9 increased and then the construction of the third coil disc is started.

Finally, in this way the first coil disk (on the left in FIG. 1) is completely finished, and the remaining coil disks have the levels indicated by 10 in FIG. 2. These levels 10 are gradually built up piece by piece according to the previous principle, until finally the conical bobbin 6 is completed.

A basic structure of a device for performing the inventive method is shown in Fig. 3. In it, a cheese 11 with a sleeve 12 runs on a drive roller 14 having a drive 13 . Basically, the package 11 can also have an Aixalan drive, which, however, should generally be controlled so that there is a substantially constant peripheral speed of the package increasing in diameter. An axial drive is recommended, for example, if the wound yarn is too sensitive for a peripheral drive.

The light coming from any pay-out reel, for example by a head 15 of yarn 16 is applied in FIG. 3 by means of a thread guide 17 on the eye 18 on the outer surface 19 of the cheese 11. In principle, the thread guide 17 can be designed as a carriage 20 on a guide 22 running parallel to the bobbin axis 21 in the direction of arrow 23 . When the carriage 20 moves in the guide 22 , the yarn 16 is then placed crosswise only on the stroke 24 determined by the guide 22 , which is small compared to the bobbin length 25 . The short periodic traversing movement of the slide 20 in the guide 22 is superimposed, according to the invention, with a generally relatively long back and forth movement of the thread guide 17 , for example with the aid of a slide 26 , in a guide 27 lying parallel to the bobbin axis 21 . Depending on whether the carriage 26 is moved continuously or discontinuously in the guide, the coil images according to FIGS . 1 and 2 arise . Obviously, any desired coil construction can be generated by controlling the carriage 26 .

The representation of the thread guide 17 with its guide elements according to FIG. 3 serves only as an illustrative example. It can of course be counted any design of the thread guide, in particular the overlaid with the help of the carriage 26 of the short-periodic oscillating movement of the carriage 20 by a corresponding drive to the package 11 itself - z. B. also on the drive roller 14 - it will be enough. The only essential thing is the independent superimposition of the two movements.

Reference symbol list

1 sleeve
2 bobbins
3 signal range
4 layers of yarn
5 sleeve
6 bobbins
7 spool disc
8 level
9 level
10 level
11 cheese
12 sleeve
13 drive
14 drive roller
15 cops
16 yarn
17 thread guides
18 eyelet
19 lateral surface ( 11 )
20 sledges
21 coil axis
22 leadership
23 arrow
24 stroke
25 spool length
26 sledges
27 leadership

Claims (9)

1. A method for producing a cross-wound bobbin ( 11 ) from yarn, in particular spun fiber yarn, with the aid of a thread guide ( 17 ) having an eyelet ( 18 ) reaching the outer surface ( 19 ) of the bobbin, in which the yarn ( 15 ) is laid down crosswise. the thread guide eyelet is shifted relative to the bobbin parallel to the bobbin axis ( 21 ), characterized in that the traversing for crosswise depositing of the yarn ( 16 ) is carried out in sections only with a stroke ( 24 ) which is small compared to the bobbin length ( 25 ), and that this short periodic oscillating movement a relatively slow to and fro pushing the thread guide eyelet ( 18 ) in Rich direction of the bobbin axis ( 21 ) is superimposed. 2. The method according to claim 1, characterized in that the back and forth is carried out continuously ( Fig. 1). 3. The method according to claim 1, characterized, that the back and forth is controlled discontinuously. 4. The method according to claim 1, characterized in that between two steps, a disc coil is at least partially constructed with a length corresponding to the amplitude of the short periodic oscillating movement ( Fig. 2). 5. The method according to any one of claims 1 to 4, characterized, that the back and forth with steps in the order of magnitude Amplitude of the short periodic oscillating movement is executed. 6. The method according to any one of claims 1 to 5, characterized, that the final coil shape by controlling the slow back and forth feed is determined. 7. Cross-wound bobbin, manufactured according to at least one of claims 1 to 6, characterized in that the stroke ( 24 ) measured in the direction of the bobbin axis ( 21 ) or the stand between two reversal points of a yarn layer was small against the bobbin length ( 25 ) . 8. cross-wound bobbin according to claim 7, characterized,  that one was between two reversal points directly on the coil sleeve yarn layer, in particular at one of the longitudinal ends of the sleeve, as a Sig nalwick is trained. 9. cheese according to claim 8, characterized, that under the signal winding an electrically conductive strip immediately bar on the coil sleeve and that the electrically conductive metal strip is compared to a contact that occurs when the on the Metal strip lying thread winding in contact with the metal strip comes and triggers a signal.