WO2008092179A1

WO2008092179A1 - Method for winding a bobbin, bobbin and device for detecting the properties of the winding material

Info

Publication number: WO2008092179A1
Application number: PCT/AT2008/000025
Authority: WO
Inventors: Alexander Mair
Original assignee: Lunatone Industrielle Elektronik Gmbh
Priority date: 2007-01-29
Filing date: 2008-01-28
Publication date: 2008-08-07
Also published as: AT504844A1; ATE547369T1; EP2132121B1; EP2132121A1; AT504844B1

Abstract

The invention relates to a bobbin (1) with a plurality of wound layers of strip- or thread-shaped winding material (3), at least one marking (M) being provided for displaying the properties of the winding material, characterized in that the winding material (3) is wound with the same laying angle as outside the marking and in at least one layer over a width that deviates substantially from the nominal winding width (BN) of the bobbin (1). In order to produce such a marking (M), winding material having the same laying angle as outside the marking is wound in at least one layer over a width that deviates substantially from the nominal winding width (BN) of the bobbin. A device is provided for detecting such a marking (M), comprising at least one thread sensor (6) for detecting the transverse movement of the winding material as it is unwound. The output signal of the thread sensor is supplied to an evaluation unit (7) which emits a marking signal (SM) in the event that, during unwinding, the winding material exceeds a width of the bobbin which deviates substantially from the nominal winding width.

Description

METHOD FOR WRAPPING A COIL, SPOOL AND DEVICE FOR DETECTING

PROPERTIES OF RUBBER

The invention relates to a spool having a plurality of wound layers of ribbon or thread-like winding material and wherein at least one mark is provided for displaying properties of the Spulguts.

Likewise, the invention relates to a. Method for producing a marking on a coil having a multiplicity of layers of ribbon-like or thread-like package material.

Finally, the invention also relates to a device for detecting a marking on a coil.

In the industrial processing of threads, tapes, wires, etc., these are often unwound at a predetermined line speed from a supply spool, hereafter referred to as "spool." By way of example, processing on a loom is mentioned, in which the generally constant processing speed of the fabric defines the speed of unwinding from the spool.

To ensure that the processing process is as efficient as possible, it must be ensured that the thread end on the bobbin is detected in good time, so that, for example, after stopping the weaving process, the thread of a new bobbin can be "seamlessly" tied up and an "endless" operation ensured. It is particularly important to detect the approach of the thread end early, because the controlled shutdown of the processing process usually requires a certain amount of time, so that a defined shutdown of the corresponding machines is given. After such a shutdown or deceleration even a small reserve of Spulgut should be available to tie the thread of a new, now full supply spool can.

According to the prior art, the detection of a certain position during the unwinding, such as the upcoming thread end, for example, using a mechanical scanning lever, which operates upon reaching a predetermined position, a micro-switch. In this solution, the mechanical complexity of the Abtastbügel and the required extremely precise adjustment taking into account a tape thickness down to 0.01 mm disadvantageous.

As an alternative to such a purely mechanical scanning and optical sensors have become known which the approaching end of the thread from the color difference or a detect different reflection behavior between the thread and the bobbin tube. However, such a method fails when thread and sleeve have the same or similar color or when transparent threads or ribbons are spooled. A disadvantage of such an optical method is also the risk of contamination of the optical sensor, which is often given in textile processing machines by parasitic, chipped by Spulgut fibers or material particles.

An object of the invention is to provide a robust, wear-free and cost-effective solution with which the achievement of a certain winding position, such as the approaching end of the winding material during unwinding safely and reliably detected without certain properties of the Spulgutes such as color, conductivity etc. or there is a risk of contamination of sensors. In general, the solution should allow the recognition of certain properties of the Spulgutes, thus not only the filling state of the coil. This task also includes a device by means of which the marking can be recognized without much effort.

The Applicant has already proposed a solution in the prior art, non-prepublished AT 502 849 B1, which provides for a marking in the form of a significant change in the laying angle, the detection of this marking preferably taking place by measuring changes in the speed of the unwound spool.

US 3,062,481 discloses a coil which includes a signal in the form of a plurality of initially-wound small-width layers on the core; the overlying layers are wrapped across the full width. The material of the signal layers has correspondingly reduced contact angle. Other methods for producing markings on bobbins with windings of small winding width are shown in EP 0876985 A1 and EP 1 225 259.

The above object is achieved with a coil of the type mentioned, in which according to the invention the mark consists in that the winding material is wound in at least one position with the same laying angle as outside the mark and over a width which is significantly greater than the rated winding width of the coil differs.

By a significant deviation or a significant change should be understood in the context of the invention, such a deviation or change, which differs from the usual, for. B. occurring in the tolerance range of the winding width changes is clearly distinguishable. Thanks to the invention, a marking on winding the coil is possible in a very simple way, without the need for additional aids, such as colors, etc. Under certain circumstances, the recognition of the mark is also possible with simpler means than is the case with the already proposed marking in the form of a change in the laying angle.

In many cases, it is sufficient if the winding material is wound in at least one layer over a width which is significantly lower than the nominal winding width of the bobbin.

In an advantageous, because easily reducible development of the invention it is provided that the Spulgut is wound in at least one layer so that the significant undershooting of the nominal winding width is present on one side.

The mark may also be a composite mark consisting of several individual markings.

In a favorable in practice development of the invention, the mark is inside the wound Spulguts. The bobbin in this case has under the mark located Spulgut, which is wound over the Nennwickelbreite.

To solve the problem, a method of the type mentioned, in which according to the invention the Spulgut the mark is wound with the same installation angle as outside the mark in at least one layer over a width which differs significantly from the nominal winding width of the coil. Preferred developments of said method correspond to those of the coil according to the invention.

The object is also achieved with a device for detecting a mark on a spool, wherein the mark consists in that the Spulgut is wound in at least one layer over a width which differs significantly from the Nennwickelbreite, at least one of the transverse movement of the Spulguts at its Abwickeln detecting thread sensor is provided and the output signal of the yarn sensor is fed to an evaluation unit which is adapted to provide a marking signal, if the Spulgut covers a significantly different from the nominal winding width width of the coil during its unwinding.

With the help of such a device that information can be read out in a simple manner, which was impressed on a coil by changing the winding width. An expedient development of the device provides that the thread sensor is a sensor which optically detects the movement of the material to be spooled.

The invention together with further advantages is explained below with reference to exemplary embodiments, which are illustrated in the drawing. In this show

1 is a schematic representation of a coil, from which is unwound Spulgut, in a view normal to the coil axis,

2 shows the coil according to FIG. 1 a side view together with a device for detecting a marking, FIG.

3 is a view as in FIG. 1, a marking occurring during unwinding,

4 shows a diagram of a signal pattern occurring at the output of a yarn sensor,

Fig. 5 is a diagram showing, for example, a change in the pulse repetition frequency of the signal pattern during unwinding of the coil and

6 shows in a diagram the occurrence of a marking signal at the output of the evaluation unit.

The supply spool 1 shown in Fig. 1 with a bobbin tube 2 and wound thereon Spulgut 3 sits here on a mandrel 4. The Spulgut can be band-shaped, thread-like or even a wire and it is guided by the coil in the direction indicated by an arrow and direction by a thread / tape guide, z. B. an eyelet 5, unwound. When unwinding the Spulgut 3 runs on the nominal width B _{N of} the coil constantly back and forth, which is also indicated by an arrow. The movement of the winding material during unwinding is monitored by a sensor 6, which is indicated in FIGS. 1 and 2. This sensor 6 may, for example, be an optical sensor whose output signal is fed to an evaluation unit 7.

As already mentioned, it is important in many cases, when unwinding a coil to recognize in time that the Spulgut is over, so that a new coil can be prepared and placed in time in its place. The invention now provides that a marking of the coil is provided, which consists in that in at least one layer, the winding material is wound over a width Bi, which deviates significantly from the nominal winding width BN. In this regard, reference is made to Fig. 3, where a position of the Spulgutes shown is, in which this is not wound on one side to the edge and thus only over a width Bi. Here, the laying angle of the Spulguts the mark M is equal to that outside the mark. If one compares Fig. 1 with Fig. 3 it can be seen that due to such a mark the Spulgut no longer passes the sensor 6 in its Hin and Hergang in the course of Abwickeins, so that it emits a corresponding signal or just no signal.

For example, it is shown in Fig. 4 that each passing of the thread on the sensor 6 generates a pulse, so that during normal winding a pulse having a period Tp corresponding to a thread passing frequency F = 1 / Tp is formed. As soon as the set mark, which is denoted below by M, occurs, the pulse drops out for at least a short period of time because of the mark M. In Fig. 5 the example course of the yarn passage frequency F, starting from a full bobbin to the point of the mark M, is shown. The thread passage frequency increases during the Abwickeins, assuming the case of a constant take-off speed of Spulguts 3, since with a smaller bobbin diameter, the spool rotates accordingly faster. Of course, when the mark M occurs, the yarn passing frequency F falls to zero and this mark M can indicate, as in the present case, that the end of the winding material is soon reached. As indicated in Fig. 5, of course, in the next layer, the Spulgut be wrapped again over the full width BN, d. h., the marking is located inside the wound material to be spooled.

It should be clear to the person skilled in the art that a large number of sensors are suitable for detecting the movement of the material to be wound, such as optical reflection or transmitted light sensors, capacitive or ultrasonic sensors and finally also mechanical touch sensors. In any case, a large number of sensors will be available to the person skilled in the art, depending on the type of material to be spooled, and accordingly the evaluation unit 7 will be constructed so that it can output a correct marking signal S _M when the marking appears. This signal is shown in FIG. 5, for example, as a rectangular pulse occurring during the marking M.

The marking is generally produced by the coil that the winding material is not wound on one or both sides to the edge and thus only over a width Bi, which differs from the nominal width BN SO strong that the deviation significantly, 3, in the simplest case, the winding material can not be wound to the edge on only one side, as an alternative, it is also possible, if sufficient space is available at least one end of the spool is present to wrap the Spulgut also beyond the nominal width BN.

In most cases, the most important and often unique marking will be a mark M at the end of the winder which results in the generation of a corresponding signal SM, starting from, for example, shutting down a machine to replace the now empty or nearly empty bobbin he follows. On the other hand, in the first or one of the first layers of Spulgutes a composite mark may be provided which consists of several individual markings, for. B. in the sense of a binary word exists, and defines or displays, for example, the Spulgutqualität or a batch number of the supply reel. It is also conceivable to set a mark, for example in the middle of the Spulgutes, which indicates a parent computing arrangement that already half of the Spulgutes is consumed.

The use of the invention with a marking of the Spulgutes brings in many cases a simplification and a shortening of the workflow, eg. As webmesh, in which a large number of coils is used and a virtually uninterrupted operation should be possible.

Claims

1. coil (1), which has a plurality of wound layers of band or thread-shaped winding material (3) and in which at least one mark (M) is provided for displaying properties of the Spulguts, characterized in that wherein the marking (M ) is that the Spulgut (3) is wound in at least one layer with the same laying angle as outside the mark and over a width (Bi), which is significantly different from the nominal winding width (B _N ) of the coil (1).

2. Coil according to claim 1, characterized in that the winding material of the marking (M) in at least one layer over a width (Bi) is wound, which lies significantly below the nominal winding width (BN) of the coil.

3. Coil according to claim 1, characterized in that the winding material of the marking (M) is wound in at least one layer so that the significant deviation from the nominal winding width (BN) is present on one side.

4. Coil according to claim 1, characterized in that the mark is a composite mark consisting of several individual markings (M).

5. Coil according to claim 1, characterized in that the coil under the mark (M) located Spulgut, which is wound over the nominal winding width (BN).

6. A method for producing a mark on a a plurality of layers of band or filamentary winding product having coil, characterized in that the winding material of the marking (M) with the same installation angle as outside the mark in at least one layer over a width (Bi) wound which deviates significantly from the nominal winding width (BN) of the coil.

7. The method according to claim 6, characterized in that the winding material of the marking (M) in at least one layer over a width (Bi) is wound, which significantly falls below the nominal winding width (BN) of the coil.

8. The method according to claim 6, characterized in that the Spulgut the marker (M) is wound on only one side of the coil so far that the nominal winding width (BN) of the coil is significantly below.

9. The method according to claim 6, characterized in that a composite mark is wound, which consists of several individual markings (M).

10. The method according to claim 6, characterized in that

- At least one layer of Spulguts on the Nennwickelbreite (BN) is wound, and above

- Spulgut as a marker (M) in at least one layer over a width (Bi) is wound, which deviates significantly from the nominal winding width (BN) of the coil.

11. A device for detecting a mark (M) on a spool (1) during unwinding of the spool, wherein the mark consists in that the Spulgut (3) is wound in at least one layer over a width (Bi), which of the Nennwickelbreite (BN) significantly deviates, in which at least one of the transverse movement of Spulguts during its unwinding detecting thread sensor (6) is provided and the output of the yarn sensor of an evaluation unit (7) is supplied, which is adapted to deliver a marking signal (SM), if the Spulgut covers a deviating from the Nennwickelbreite significantly different width of the coil during its unwinding.

12. The device according to claim 11, characterized in that the thread sensor (6) is a movement of the Spulguts (3) optically detecting sensor.