CN204434844U - For the manufacture of the device of group at least two section beams of for weaving process - Google Patents

Abstract

The utility model relates to a device for manufacturing a group of at least two sectioned warp beams used in the weaving process. Here the yarn from the yarn source is wound onto the section warping beam core. It is desirable to be able to cost-effectively manufacture a set of beams. It is provided for this that the yarn is wound onto the warping cylinder (6) of the warping device (7) before being wound onto the section warp beam core (10) and is then reformed onto the section warp beam on the core (10).

Description

Apparatus for manufacturing a set of at least two section warp beams for use in a weaving process

technical field

The utility model relates to a method for manufacturing a group of at least two section warp beams (Teilkettbaum) for the weaving process (Wirkprozess), in which method yarns are wound on the section warp beam cores (Teilkettbaumkern )superior.

Furthermore, the invention relates to a device for producing a set of at least two section warp beams for the weaving process, with a yarn source and a winding device with a Housing and drive for the shaft core.

Background technique

In order to manufacture warp knitted fabrics it is necessary to provide warp threads. The yarn formed from this warp thread is then formed into loops by means of a weaving tool (Wirkwerkzeug, sometimes called looping tool). The fabric produced here is drawn and wound.

Often the warp threads are not provided on a single warp beam having approximately the width of the finished fabric, but rather by two or more section warp beams having a significantly smaller width. Sectional warp beams having a width of up to 42 inches are common in warp knitting. Typically the width of a section warp beam is only 21 inches.

In the case of such small widths it is possible to produce the section warp beams in the so-called "direct warping method", ie to wrap all the threads of the section warp beams at the same time. These yarns are drawn from bobbins (Spules), which are provided in correspondingly large creels. However, large creels also entail enormous costs in production and operation. Furthermore, generally correspondingly large building parts are required, which in turn entails correspondingly high costs.

Utility model content

The object of the present invention is to manufacture section warp beams cost-effectively.

In a method of the type mentioned at the outset, this object is achieved in that the yarn is wound onto the warping cylinder of the warping device before being wound onto the section warping core and is reformed afterwards (umbäumen, sometimes called the inverted axis) to the section warping axis core.

In this way the section warping is combined with the generation of section warping beams. In section warping, groups of yarns, also called "tapes", are wound on warping cylinders in desired lengths. If the desired length of the warp is achieved, the belt is offset by the width of the belt and the winding process is restarted. Since significantly fewer threads are wound simultaneously in this section warping, a correspondingly smaller creel is also sufficient, so that the costs for the creel can also be kept low.

Preferably, the layer thickness variation is obtained when reforming a first section warp beam and is stored and replicated when reforming a subsequent section warp beam. When fabrics are produced in warp knitting machines, the section warp beams are arranged together and stretched on one shaft, so that the section warp beams must rotate in the same way. If it is now taken into consideration that the layer thickness variation is the same on all section beams, then the risk of stress differences occurring between the different section beams during the withdrawal of the yarn sheets from the section beams is relatively small. Such stress differentials may adversely affect the quality of the manufactured fabric. In principle, the layer thickness variation mirrors the winding process. In the simplest case, the thickness of the section warp beam increases, recording the number of revolutions of the section warp beam when winding the first section warp beam. It is then ensured that the thickness increase per number of revolutions of the section warp beams is the same when winding the subsequent section warp beams. This ensures that all section beams exhibit the same behavior when unwinding.

Preferably, sheet stress is influenced to replicate layer thickness variations. This can be achieved, for example, by braking or accelerating the warping cylinder during withdrawal, depending on whether higher or lower yarn stresses are desired.

Preferably, the yarn is wound onto the warping cylinder in tape form, wherein the warping layer thickness variation is acquired and stored when winding the first tape of the first section warp beam, and is replicated when winding subsequent tapes The warp layer thickness varies. It is known to "replicate" changes in warp layer thickness or turns for individual warping processes. However, it goes one step further in the current method. The structure of the first band is used not only for duplicating the subsequent bands of a warp beam, but also for the structure of the subsequent bands of all partial warp beams belonging to a group. This ensures that the turns formed on the warping cylinder already have the same structure for all section warper beams. This later results in a better quality for the section warp beam.

Preferably, a thickness measuring device is used to obtain the layer thickness change and is also used to obtain the warp layer thickness change. Only a single thickness measuring device is therefore required, so that the additional costs required for detecting the layer thickness variation and for adjusting the layer thickness variation on the section warping beam can be kept low.

It is preferred here to use an optical thickness measuring device which has a directional-variable measuring beam. For example, an optical thickness measuring device of this type can be formed by a "laser". The laser must then be simply swiveled when transitioning from warping to reforming.

In a device of the type mentioned at the outset, this object is achieved in that a warping device is arranged between the yarn source and the winding device.

As already explained above in connection with the method, the process for producing the segmented warp beams can be divided into two parts. First, in the warping unit, coils are produced on the warping cylinders, which have the width of the later section warping beams. In the section warping process this coil can be produced by simultaneously wrapping a so-called "tape" of the yarn group with the desired length of the warp and after completion of the tape offset by the width of the tape and rewrapped. the desired length. This process is repeated until the desired width of the section warp beam has been achieved. Subsequently, it can be reformed onto a section warp beam and the same process repeated for the next section warp beam.

Preferably, the winding device has a layer thickness monitoring device which registers the layer thickness change of the first partial warp beam and a layer thickness control device which reproduces this layer thickness change when winding subsequent partial warp beams. It can thus be said that the first section warp beam is "duplicated" with respect to the winding variation of the first section warp beam. If the section warp beams have all been wound in the same way when winding up, the section warp beams also exhibit the same behavior when unwinding. This advantageously has the effect that the threads drawn from the section warp beams all have the same thread tension. Stress differentials that could impair the quality of the fabric produced during weaving are avoided.

Preferably, the warping device has means for obtaining and recording the warping layer variation of the first belt and a warping layer thickness adjustment device for replicating the warping layer variation of the first belt when winding subsequent belts. All straps can thus be wound in the same way. The winding process of the first tape is replicated not only for subsequent tapes of the same section warp beam, but also for subsequently wound tapes of other section warp beams. It can thus be ensured in a simple manner that the coils wound in the warping device already have the same structure. If then also the same type of layer thickness variation can also be produced in all section warp beams when reforming the same type of coils, then all section warp beams of a group can be used together later in the weaving process All section beams in the process are equipped with the same type of winding structure.

Preferably, the device for obtaining changes in the warp layer and the layer thickness monitoring device have a common thickness measuring device. The fact that the warping device and the winding device are not used for wrapping at the same time is thus utilized, but the yarn is wound up in the warping device in a first step and the yarn is rewound in a subsequent step in time. into the winding device. Accordingly, the thickness measuring device is used alternately in the two processes. This keeps costs low.

Preferably, the thickness-measuring device is designed as an optical thickness-measuring device with a directional-variable measuring beam. The measuring beam can be directed either at the warping device or at the winding device, so that the same measuring device can be used for warping and for reforming.

Preferably, the winding device has a yarn stress regulator. The yarn stress regulator can be used to match the layer thickness variation in the second and further section warp beams to the layer thickness variation of the first section warp beam of a group of section warp beams.

Description of drawings

Describe the utility model according to preferred embodiment below in conjunction with drawing. in:

Figure 1 shows a device for producing a set of at least two section warp beams in a first method step,

Figure 2 shows the device in the second method step, and

Figure 3 shows a very schematic view of the warping device together with the winding device.

Detailed ways

A device 1 for producing a group of at least two section warp beams for a weaving process has a creel 2 as a yarn source. A plurality of bobbins 3 are arranged in the creel 2 . A yarn 4 can be drawn from each bobbin 3 . The yarns are combined by means of devices known per se into a belt 5 , ie a yarn group, and are then wound on a warping cylinder 6 of a warping device 7 . The warper 7 is configured as a conical warper, ie the warping cylinder 6 is provided with a conical section 8 . Correspondingly, the yarn 4 can be wound on the warping cylinder 6 in the section warping method. First the first tape 5 is wound, precisely with the desired length for the later warp threads. The warping cylinder 6 rotates here. The warping cylinder 6 and the belt 5 are offset laterally by a small distance with each revolution of the warping cylinder 6 , so that the belt 5 moves upward along the conical section 8 during winding. If the tape 5 has been wound with the desired length, the tape 5 is offset by the width of the tape 5 away from the tapered section 8 and rewound with the desired length. In this case, the structure of the formed coil is monitored with the first belt 5 and recorded, that is to say the increase in the thickness of the coil on the warping cylinder 6 with each revolution of the warping cylinder 6 is obtained. . For reasons of simplicity, this is referred to as "warp thickness variation".

After the warp layer thickness variation for the first tape 5 has been obtained and stored, the next tape 5 is wound in the same way. The warping layer thickness variation can be influenced in different ways. One possibility consists in varying the tension of the threads 4 of the belt 5 . Another possibility is to apply pressure rollers to the laps formed on the warping cylinder 6 . The goal is to wrap all strips 5 with the same warp layer thickness variation.

Sectional warping is interrupted when a warp thread of the desired length and desired width for the section warp beam is wound onto the warp cylinder 6 .

As can be seen in FIG. 2 , a winding device 9 is arranged on the side of the warping device 7 facing away from the creel 2 . In this winding device 9 there is a section warping beam 10 , which is rotatably mounted in a receptacle 11 . A drive, not shown in detail, is provided to rotate the section warping beam core 10 .

The section beam core 10 has a width of about 21 inches, up to 42 inches.

If the section warp core 10 is rotated, the section warp core 10 draws warp threads 12 from the coils 13 which have previously been formed on the warp cylinder 6 . In a similar manner as before when wrapping the tape, a change in the layer thickness on the section warping beam 10 is now obtained during the so-called reforming process, i.e. a thickness increase per revolution of the section warping beam 10 . Layer thickness changes are stored.

If the first section warp beam has been completed in this way, the process is repeated, that is to say first the coils are produced from successively wound strips 5 on the circumference of the warping cylinder 6 . Here, however, the warping layer thickness of the first strip of the first partial warping beam varies in order to form the individual coil sections of the coil.

During reforming, the layer thickness variation on the partial warp beam core 10 is recovered and the layer thickness variation of the first partial warp beam is reproduced.

It can thus be achieved that all section warp beams have practically the same structure.

Each section warp beam is homogeneous in itself, since all strips 5 have been wound with the same warp layer thickness variation. The section warp beams are also uniform with respect to each other, since all tapes for all section warp beams have been wound with the same warp layer thickness variation. Furthermore, the section warp beams also have the same structure after reforming, since the layer thickness variation of the first section warp beams has been copied, so to speak, to the subsequent section warp beams.

If the section warp beams of a group of section warp beams are then introduced into the warp knitting machine, the section warp beams can be tensioned against one another in a rotationally fixed manner or can be arranged on a common shaft. Nevertheless, when the warp threads are drawn from these section warp beams, practically no stress differences occur which adversely affect the appearance of the fabric.

FIG. 3 schematically shows the possibility of how to obtain and monitor changes in the warping layer thickness of a belt wound onto the warping cylinder 6 . Furthermore, it can be seen how the layer thickness variation on the section warping beam core can be detected and monitored.

A thickness measuring device 13 is provided which preferably operates optically, for example with a laser beam 14 which is directed at the circumference of the warping cylinder 6 . Furthermore, a tachometer 15 is provided, which detects the number of revolutions of the warping cylinder 6 . The thickness variations of the warped layers and the number of turns are stored in a common processing device 16 . A warping layer thickness variation is thus obtained for the first belt 5 which is wound onto the warping cylinder 6 .

Then for the belt 5 that is wound onto the warping cylinder 6 subsequently, the handling device 16 influences the yarn stress regulator 17, with which the yarn stress regulator 17 can realize that the warping layer thickness variation of the first wound belt 5 can be is copied onto the subsequently wound tape 5.

The thickness measuring device 13 can be swiveled, as indicated by the dashed lines, so that its beam 14 can also be directed onto the section warping beam core 10 . The section warping beam core 10 is also connected to a revolution counter 15 , which detects the number of revolutions of the section warping beam core 10 . The information from the measuring device 13 and the information on the number of revolutions performed are fed to a processing device 16 which acquires and stores the layer thickness variation for the first section warp beam. For the subsequent section warp beams, the handling device 16 influences the yarn stress regulator 18 for the section warp beam core 10 so that all the first section warp beams of a group of section warp beams can be wound with the same layer thickness variation. A section warp beam after a section warp beam.

The yarn stress regulators 17 , 18 are only shown schematically here. The thread stress regulators 17 , 18 can also be supplemented or replaced by rollers which rest against the coils formed on the warping cylinder 6 or on the section warping beam core 10 and can apply pressure. The yarn stress can be influenced by braking the yarn or by driving the warping cylinder 6 or the section beam core 10 more strongly.

Claims (6)

1. A device (1) for manufacturing a group of at least two section warp beams for the weaving process, the device has a yarn source (2) and a winding device (9), the winding device (9 ) has a receptacle (11) and a drive for a section warping core (10), characterized in that a warping device is arranged between the yarn source (2) and the winding device (9) (7). 2. Device according to claim 1, characterized in that the winding device (9) has: a layer thickness monitoring device which records the layer thickness variation of the first section warp beam; and the layer thickness A regulating device which replicates said layer thickness variation when winding a subsequent section warp beam. 3. The device according to claim 2, characterized in that the warping device (7) has means for obtaining and recording the warping layer variation of the first belt (5) and a warping layer thickness adjustment device, The warping layer thickness regulating device replicates the warping layer variation of said first belt (5) when winding a subsequent belt (5). 4. The device according to claim 3, characterized in that the device for obtaining the warping layer variation and the layer thickness monitoring device have a common thickness measuring device (13). 5 . The device according to claim 4 , characterized in that the thickness measuring device ( 13 ) is designed as an optical thickness measuring device with a directionally variable measuring beam ( 14 ). 6. Device according to any one of claims 1 to 5, characterized in that the winding device (9) has a yarn stress regulator (19).