EP0334211B1 - Method for making a self-supporting wire package - Google Patents

Abstract

Method for producing a self-supporting bundle from strand-like material, this strand-like material being wound in a plurality of layers onto an essentially conical winding reel. The layers are inclined relative to the longitudinal axis of the winding reel. The first layer contains N1 turns, whilst the next layer, wound in the same direction as the first layer, contains N1 + DELTA N turns. The number of turns in each winding layer wound in the same direction is increased in the same way, until the total number of possible turns at the selected winding pitch is reached. <IMAGE>

Description

The present invention relates to a method for producing a bobbinless package from strand-like material, such as wire, insulated or non-insulated strands, glass fibers and the like, and an apparatus for carrying out the method.

When processing strand-like material, such as. B. with wire, there is usually the problem that the further processing of the wire does not take place at the point and often not in the operation in which the wire itself was produced. The strand-like material must then be suitably prepared for transport and brought to the processing point.

This is usually done by winding the material to be wound on spools, which are then transported together with the material to be wound. A large number of coils must therefore be kept in the corresponding factories, which requires a considerable investment. Furthermore, the empty bobbins have to be transported back from the processing point to the production plant, which results in considerable costs. Finally, the coils also increase the transport weight of the winding material, which also entails an increase in the transport costs.

It is therefore a desire of the industry concerned that strand-like material such. B. wire, not wound on spools, but is transported and delivered as a bundle, which essentially consists only of the actual strand-like good itself. This type of packaging is usually referred to as a single-use packaging.

DE-OS 35 20 195 a method for producing a disposable pack has become known.

In this known method, a conical winding coil is used. The strand-like material is then wound in individual, parallel layers on this conical winding spool, an adhesive being provided which adhesively connects the individual turns and layers. The wire is then removed from the inside during further processing.

This known method and the resulting container have a number of significant disadvantages.

The first disadvantage is the fact that an adhesive is required to produce the container, which makes the process complicated and expensive. Furthermore, this adhesive can lead to a disruption of the processing process and must therefore u. May be removed first.

In addition, in spite of the adhesive, the wire layers can get tangled, namely when the adhesive forces between individual layers are exceeded towards the end of the removal process, so that several turns fall down at once.

A method according to the preamble of claim 1 is known from EP-A-0 241 964. The third figure of this document shows a winding spool which has a conical winding core and two conically shaped flanges. The winding begins on the flange, which is due to the larger diameter of the conical winding core, and is carried out with an increasing number of turns. This creates a winding structure in which the individual turns are supported against the conical core of the winding core. In contrast to the method according to the present invention, however, this winding structure is not used to produce a package without a coil. The entire winding bobbin and the material wound thereon are rather transported as a unit, for which purpose the lower part of the winding bobbin is designed directly like a pallet. Furthermore, the flanges are designed conical so that high tensions and friction values, which can lead to breakage of the winding material, are avoided when the winding material is drawn off via the flange.

The object of the present invention is to provide a method for producing a package without a coil, which is simple and inexpensive to carry out and which leads to a stable, easily transportable and processable package. Furthermore, an apparatus for performing this method is to be specified.

This object is achieved according to the invention by the subject matter of claim 1. The device according to the invention for carrying out the method is the subject of claim 20. The container produced by the method is the subject of claim 12. Advantageous further developments are the subject of the subclaims.

With the method according to the invention, a possibility is provided for the production of single-use packs from strand-like material, which has considerable advantages over the methods known in the prior art. The special control of the winding makes it possible to create containers which are formed in the manner of a double cone, so that the individual turns can be supported against one another. This makes the structure of the container much more stable for transportation without the need for an adhesive.

The method according to the invention also means that the finished container can be handled in a particularly simple and safe manner. In principle, it is possible to remove the container from both the inside and the outside. In the case of internal extraction, the container is usually arranged in such a way that the longitudinal axis of the container is vertical and the larger inner diameter of the container is at the bottom. If this wire is then withdrawn from the inside, each wire winding is supported by the underlying wire winding due to the inclination given by the conical winding coil, so that the wire windings cannot fall down.

However, it is also particularly advantageous here to use an external extraction method which cannot be carried out with the containers known in the prior art. In this method, the container is also arranged with its longitudinal axis in the vertical direction, in such a way that the smaller inside diameter of the container is at the bottom. A pull-off disk is then placed on the container, the diameter of which is equal to or larger than the outer diameter of the container, and which preferably rotate can. The strand-like material, ie the wire, for example, is then pulled off "overhead", ie it is guided past this disk. In this form of withdrawal, too, the container is drawn off in such a way that the turns support one another, so that each turn is supported by a turn lying further down, the winding diameter of which is larger than the diameter of the preceding turn. This prevents the upper turn from sliding down.

The container thus remains in a very stable condition even when the outer trigger is removed, which makes it possible to interrupt the take-off process as desired and to resume it without fear that windings will slip during standstill and the strand-like material will get tangled as a result.

The high stability of the container also makes transportation much easier.

The method according to the invention can be carried out with very different strand-like material. The winding of wire for which this method is particularly suitable is mentioned. Furthermore, a high suitability of the method for the simultaneous winding of several, twisted or untwisted wires was found. The fulfillment of this requirement is a particular advantage of this method, since the simultaneous winding of several wires, which then have to be unwound and separated, plays an important role in wire production today.

It is also possible with this method to wind up already finished strands and also insulated strands and similar cables. Glass fibers can also be wound up in this way.

In an advantageous development of the method according to the invention, the winding spool can rotate during the winding process. In this case, an up and down moving laying roller is used, which leads the strand-like material to the coil at the desired height. As a result rotation of the winding spool, a twist-free winding of the winding material is made possible. It should be noted that in this embodiment, the speed of the winding spool must change with the change in the position of the laying device to ensure that at constant wire feed speed, each diameter of the winding spool has the same peripheral speed.

According to a further preferred embodiment, the winding spool is stationary during the winding process. In this case, the laying device moves around the spool and places the wire around the winding spool in accordance with the features of the method according to the invention. The strand-like material then generally has a twist, since the material is rotated through 360 ° with each turn. This twist can be removed when the spool is being unwound by unwinding or flaying in the opposite direction. If the twist is desired for further processing, e.g. B. in the manufacture of strands, the twist can be increased by a further revolution per turn when pulling.

According to a further preferred embodiment of the method, after reaching the maximum number of turns N _max , ie as soon as the first layer has reached the flange of the winding coil opposite the starting flange, winding layers are applied which are parallel to this last layer. This maintains the advantageous, inclined shape of the winding.

According to a further preferred embodiment, as soon as a part of the winding layer reaches the maximum diameter of the coil flange on one side, the winding is continued in such a way that a cylindrical structure ultimately results. For this purpose, the laying device is controlled practically in the same way as at the beginning of the laying, with the difference that the number of turns decreases now accordingly. This embodiment of the The method has the advantage that the volume of the container is better used.

As explained in claim 1, the method is carried out so that first a layer L _{1a is} wound with the number of windings N₁. As soon as the number N 1 is reached, the direction of movement of the laying roller is reversed and a layer L _{1 b is wound back} to the starting point of the first layer L _{1 a} , which also essentially has the number of turns N 1. The next layer L _2a , which is wound in the same direction as the layer L _1a , has a number of N₂> N₁ turns, the difference between the number N₂ and the number N₁ corresponds to the winding factor Δ N. This winding factor is essentially maintained in all subsequent windings, so that, as desired, the preferred conical structure of the turns results. That is, so that the number of turns N₃ of the layers L _3a and L _{3b is} again increased by the winding factor Δ N etc.

According to a preferred embodiment, the winding factor is between 2 and 6, preferably between 3 and 5. For this winding factor, a cone opening angle between 12 and 16 °, preferably between 13 and 15 °, is preferred. The cone opening angle here means the total opening angle of the winding spool during the winding process. I.e. So that at a cone opening angle of z. B. 16 °, the generatrix of the cone in the axial section is inclined by 8 ° to the longitudinal axis of the winding spool.

According to a further preferred embodiment, the winding factor is between 6 and 12, preferably between 7 and 11. In this winding factor, an opening angle of the cone is preferably used which is between close to 0 ° and 12 °.

The method according to the invention can be carried out with a different winding pitch, that is to say the distance between two adjacent windings from one another, based on the diameter of the material to be wound. A winding pitch is preferred from 1.5 to 3. This winding pitch has the advantage that minor deviations in the wire height when laying and pulling off cannot impair the stability of the container.

• Fig. 1 einen schematischen Querschnitt durch eine Wickelvorrichtung zur Durchführung des erfindungsgemäßen Verfahrens;
• Fig. 2 eine Schemadarstellung der Verlegung;
• Fig. 3 ein gemäß dem Verfahren fertiggestelltes Gebinde;
• Fig. 4 den Aufbau der unterschiedlichen Lagen;
• Fig. 5 die Verpackung des Gebindes;
• Fig. 6 den Außenabzug des strangförmigen Gutes ohne Hilfseinrichtung;
• Fig. 7 den Außenabzug des strangförmigen Gutes mit einer speziellen Vorrichtung;
• Fig. 8 den Abzug unter Verwendung mehrerer Gebinde und
• Fig. 9 die Anordnung mehrerer Gebinde beim Transport.
• Fig. 10 den Innenabzug des strangförmigen Gutes

Further advantages, features and possible uses of the present invention result from the subclaims and from the following description in connection with the figures. In it show:

• Figure 1 is a schematic cross section through a winding device for performing the method according to the invention.
• 2 shows a schematic representation of the laying;
• 3 shows a container completed according to the method;
• 4 shows the structure of the different layers;
• 5 shows the packaging of the container;
• 6 shows the external discharge of the strand-like material without an auxiliary device;
• 7 shows the external discharge of the strand-like material with a special device;
• Fig. 8 the deduction using several containers and
• Fig. 9 shows the arrangement of several containers during transport.
• Fig. 10 shows the internal deduction of the strand-like material

The implementation of the method according to the invention and the construction of the device according to the invention is described by way of example with reference to FIGS. 1-4, the embodiment with a rotating winding spool being provided here. The device consists of the actual winding core 1, which is conical and has a cone opening angle, which is denoted schematically by 2. The The winding bobbin also has a first flange 3 and a second flange 4, both flanges being arranged perpendicular to the longitudinal axis 5 of the winding bobbin. The two flanges are disc-shaped and have no conical surfaces. The second flange 4 is removable so that the winding spool can be removed from the finished container. Furthermore, the winding spool is preferably designed to be divisible in order to simplify the removal of the winding spool.

On the winding spool a thin sleeve 10 is applied, which is adapted to the contour of the winding spool, and which z. B. can consist of paper. This thin casing 10 remains after the completion of the container and increases its strength during transport or when the external trigger is removed.

errechnet. Im vorliegenden Fall ist Δ N = 4, d. h., zufälligerweise gleich der Anzahl N₁ der ersten Lage L₁. Die Lage L_2a enthält deshalb 8 Wicklungen, die in Richtung des Pfeils 22 gewickelt werden, die Lage L_2b enthält dann ebenfalls 8 Wicklungen, die in Richtung des Pfeiles 23 gewickelt werden. Die nächste Lage L_3a hat dann N₂ + Δ N = 8 + 4 = 12 Wicklungen, die nicht dargestellte Lage L_4a hätte dann 16, die Lage L_5a dann 20 usw.. Die Anzahl der Wicklungen wird also bei jeder neuen, in der gleichen Richtung gewickelten Lage, um einen konstanten Betrag erhöht. Selbstverständlich könnte man diesen Betrag auch variieren, wenn dies zum Aufbau des Gebindes vorteilhafter ist.The laying of the strand-like material, in the present case a wire, begins at the flange of the winding spool, which is arranged on the part of the winding spool which has the smallest diameter. For reasons that will be described in more detail below, the wire 12 is first loosely guided over the second flange 4, the laying then begins with the wire winding 20, which represents the first winding led to the winding spool. never laying is carried out with a laying roller 21, which is moved up and down in a controlled manner and which feeds the wire 13 arriving at a substantially constant speed to the rotating winding spool. The control of the laying roller 21 can best be seen in Figure 2. The laying begins with the laying of the layer L _1a , 4 windings being wound in the direction of the arrow 22 in the present case. Then the laying roller reverses its direction of movement and winds back 4 turns, which form the layer L _1b . The number of windings N 1 of the layer 1 is 4. Then the layer L 2 is wound, the number N 2 of the turns being derived from the equation: $${\text{N}}_{\text{x}}{\text{= N}}_{\text{x}}\text{- 1 + Δ N}$$

calculated. In the present case, Δ N = 4, ie, coincidentally equal to the number N 1 of the first layer L 1. The layer L _2a therefore contains 8 windings which are wound in the direction of the arrow 22, the layer L _2b then likewise contains 8 windings which are wound in the direction of the arrow 23. The next layer L _3a then has N₂ + Δ N = 8 + 4 = 12 windings, the layer L _4a not shown would then have 16, the layer L _5a then 20, etc. The number of windings is therefore with each new one in the same direction wound position, increased by a constant amount. Of course, one could also vary this amount if this is more advantageous for the assembly of the container.

The continuation of the winding process is best seen in Figures 3 and 4. The laying process is continued in the manner described until finally the number of turns is so high that the opposite first flange 3 with the turns is reached. As soon as this point is reached, the following layers are wound with the same number of turns, which results in parallel layers of wire. This course of the windings is shown schematically by dashed lines 25 running parallel in Figure 3.

The winding of the parallel layers is continued until the outermost edge of the second coil flange 4 is reached. The winding process can then either be ended or it can be continued by applying a reduced number of turns in each case, practically in reverse to the beginning, so that the container is given an externally cylindrical shape. The end of the wire 26 is then returned in a few turns 49 with a large slope to the starting point of the winding process and then lies next to the start of the wire 12.

The schematic structure of the wire winding is best seen in Figure 4. The wire container consists of an inner part 40, which is double-conical in shape, that is to say it narrows conically inwards and outwards expanded conically. This double-conical shape has the essential advantage that when unwinding, when the wire reaches the inner layers, which are always critical during the unwinding process, the diameter of the windings, when the container is upright, widens downwards, regardless of whether from the inside or is subtracted from the outside. In this way it is e.g. B. possible to create containers as merchandise that do not have to take into account the specific requirements of the customer, whether there is an internal or external deduction.

In addition to this double-conical part 40, a parallel part 42 is present in the exemplary embodiment shown, the diameter of which also increases towards the bottom. It is pointed out that this parallel part 42 can of course also be omitted, it is readily possible to assemble the container only from the double-conical part.

At the parallel areas 42, the area 43 then follows, in which the layers are arranged in such a way that a cylindrical outer shape of the container results. B. can be achieved in which the winding process that led to the production of the first part of the winding is exactly reversed. This part of the winding can of course also be omitted.

Figure 5 shows a container ready for dispatch, which has been obtained by the method according to the invention. The container has a cardboard cover 10, which gives it additional stability on the inside. Furthermore, an outer shell 50, for. B. provided a plastic film that protects the container from dirt during transport. Additional stability for transport is achieved by strapping 51, which are placed around the container, as shown in Figure 5. In order to facilitate the application of these strapping, corresponding channels are already provided in the winding spool. Furthermore, are plastic or in the circumferential direction Steel strips 52 are provided, which continue to give the container stability.

Fig. 6 shows how the material to be wound can be removed from the package without using a device. This is done by positioning the container upright so that the smaller diameter of the container points downwards. The wire 56 is then pulled up, preferably through an eyelet, not shown here.

In the same way, it is also possible to pull off the finished container on the inside. With the internal trigger, however, in order to take full advantage of the double cone effect, the container is set up so that the part with the larger diameter of the container points downwards. It is rotated by 180 ° compared to the illustration in FIG. 6. Such an internal trigger is shown in FIG. 10, the wire 95 being pulled off the center 96 here.

FIG. 7 shows how the container according to FIG. 5 is removed using a device. In the cardboard core 10 of the container, a pull-off device 60 is inserted, which consists of a core 61 and a rotatable disk 62, which has a circular strip 63 on its outer circumference. The trigger plate 62 is preferably designed to be rotatable. The take-off then takes place via this disc, in which the strand-like material is drawn through an eyelet 65 arranged in the axis of the container, which is connected to the take-off device in a manner not shown here.

As can be seen from FIG. 7, the individual turns are drawn off one after the other, with each subsequent turn in this area of the container having a larger diameter than the turn underneath. This prevents the windings from slipping downward, and the strand-like material cannot get tangled during the withdrawal, in particular when the withdrawal process is at a standstill.

It should be emphasized again that the external withdrawal of the container is the preferred form of withdrawal for the containers according to the method according to the invention, but it is of course also possible and is also within the scope of the present invention to remove the wire from the inside according to the needs of the customer .

FIG. 8 shows how two containers produced by the method according to the invention are connected to one another in order to have a transition from a first container 70 to a second container 71 without loss of time.

FIG. 9 shows how several of the containers produced by the method according to the invention are made available for transport. As can be seen, the containers 90 can be provided on a pallet 91 for transport without any further aids. In order to give the container sufficient stability, strapping 92 is again provided, as already described.

In this method, as shown in FIG. 8, the outward end of the wire 12 is connected to the outward end of the wire 26. As soon as the first spool 70 has been unwound, the unwinding process continues with the second container 71. A third or fourth container can also be connected in the same way.

Claims (24)

1. Method for making a self-supporting package from continuous material, such as for example wire, insulated on non-insulated stranded conductors, glass fibres and the like, in which the continuous material is wound in layers on a winding bobbin of substantially conical shape, the layers being inclined with respect to the longitudinal axis of the winding bobbin and in which a laying device is used, which moves approximately parallel to the axial direction, in which method first of all a first winding layer with a predetermined quantity N₁ of turns is applied to the winding bobbin, which is less than the total number N_max of the quantity of turns to be applied at the maximum to the winding bobbin at the selected winding pitch, whereupon the laying device is reversed in its direction of movement and the continuous material is wound back to the starting point of the winding process and whereupon further winding layers are applied, which have a quantity of N_x turns, which in each case are greater than the quantity of turns N_x-1 of the preceding layer wound in the same direction, until the maximum number of turns N_max is reached, characterised in that the winding process begins on the side of the winding core with the smallest diameter and that the number of turns N_x₋₁, N_x, N_x+1 of the successive layers (L_x-1, L_x, L_x+1 ) wound in the same direction as the first layer increases respectively by a constant winding factor Δ N.
2. Method according to Claim 1, characterised in that the winding bobbin rotates during the winding process.
3. Method according to Claim 1, characterised in that the winding bobbin is stationary during the winding process and the laying device moves around the winding bobbin.
4. Method according to one of Claims 1 to 3, characterised in that after reaching the maximum number of turns N_max, parallel layers are applied.
5. Method according to Claim 4, characterised in that after reaching the maximum diameter of the package, layers with decreasing number of turns are wound, so that a substantially cylindrical package results.
6. Method according to at least one of Claims 1 to 5, characterised in that the winding factor Δ N, i.e. the difference in the numbers of turns between two successive winding layers wound in the same direction, is between 2 and 6.
7. Method according to Claim 6, characterised in that the inner surface line of the package, which corresponds to the cone angle of the winding bobbin, is kept between 12° and 16°.
8. Method according to at least one of Claims 1 to 5, characterised in that the winding factor Δ N lies between 6 and 12.
9. Method according to Claim 8, characterised in that the inner surface line of the package, which corresponds to the cone angle of the winding bobbin, is kept between close to 0° and 12°.
10. Method according to at least one of Claims 1 to 9, characterised in that the winding pitch, i.e. the distance between two adjacent turns, amounts to approximately between 1.5 to 2.5 times the diameter of the winding material.
11. Method according to at least one of Claims 1 to 10, characterised in that before the beginning of the winding operation, a casing is placed on the winding bobbin, which is adapted to the contour of the winding bobbin and which remains in the package after the removal of the winding bobbin.
12. Package characterised in that it is produced by a method according to at least one of Claims 1 to 11.
13. Package according to Claim 12, which contains a plurality of layers consisting of a plurality of individual turns, characterised in that both layers which extend parallel to the cone angle of the winding bobbin as well as layers which extend at an acute angle with respect to this cone angle, exist.
14. Package according to Claim 12 or 13, characterised in that the acute angle, which the layers adopt with respect to the cone angle, is greater than half the opening angle of the cone.
15. Package according to at least one of Claims 12 to 14, characterised in that the continuous material is wound with a twist.
16. Package according to at least one of Claims 12 to 14, characterised in that the continuous material is wound without a twist.
17. Package according to at least one of Claims 12 to 16, characterised in that the package comprises a cardboard core (10).
18. Package according to at least one of Claims 12 to 17, characterised in that the package is held in its initial state by peripheral bands (92).
19. Package according to at least one of Claims 12 to 18, characterised in that several individual parts of a continuous material, for example several individual thin wires are wound jointly.
20. Apparatus for carrying out the method according to at least one of Claims 1 to 11, with a conical winding core (1) provided with flanges, on which a first and a second flange (3,4) are located and a laying device (21), which moves approximately parallel to the axial direction, this laying device being controlled so that at least one first winding layer with a predetermined quantity N₁ of turns is applied to the winding bobbin, which is smaller than the total number N_max of the quantity of turns to be applied at maximum to the winding bobbin with a given winding pitch, whereupon the laying device is reversed in its direction of movement and the continuous material is wound back to the starting point of the winding process and whereupon further winding layers are applied, which have a quantity of N_x turns, which is respectively greater than the quantity of turns N_x-1 of the preceding layer wound in the same direction, until the maximum number of turns N_max is reached, characterised in that at the beginning of the winding process, the laying device (21) is located on the side of the winding core (1) with the smallest diameter, that counting devices are provided, which count the quantity of turns N_x , which are wound within one layer on the winding core (1), that a comparator is provided, which produces an output signal, as soon as a predetermined quantity N_x of turns is reached, this signal having the effect that the direction of movement of the laying device is reversed, that an adder is provided, which, as long as the maximum number of turns N_max is not reached, whenever the laying device (21) reaches its initial position at the smallest diameter of the winding core, adds a constant winding factor Δ N to the last selected quantity of turns N_x and thus fixes the new initial value N_x+1 for the next winding layer.
21. Apparatus according to Claim 20, characterised in that the counting devices are constructed as pulse counting devices, which receive a predetermined number of pulses at the time of each rotation of the winding bobbin or of the laying device.
22. Apparatus according to Claim 20 or 21, characterised in that provided in the winding core (1) are channels which are partly open towards the winding, which channels are distributed in the peripheral direction and extend parallel to the surface line of the winding core (1).
23. Apparatus according to at least one of Claims 20 to 22, characterised in that the axis of the winding core (1) is arranged vertically during the winding process.
24. Apparatus according to at least one of Claims 20 to 22, characterised in that the axis of the winding core (1) is arranged horizontally during the winding process.

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