EP3430187A1

EP3430187A1 - Textile machine having uniform thread tension

Info

Publication number: EP3430187A1
Application number: EP17716134.6A
Authority: EP
Inventors: Marcel WOHLLEB; Dietmar Tränkle; Joachim KLEINER; Zoran RAIC
Original assignee: Sipra Patententwicklungs und Beteiligungs GmbH
Current assignee: Sipra Patententwicklungs und Beteiligungs GmbH
Priority date: 2016-03-14
Filing date: 2017-03-13
Publication date: 2019-01-23
Also published as: WO2017157871A1; TWM601250U; JP3224779U; CN210506700U; TW201736656A

Abstract

The invention relates to a textile-processing device, having a thread-processing unit (4) for processing a thread (F) that is under tension with varying thread consumption and having a thread-providing apparatus (3) for providing the thread for the thread-processing unit. In said textile-processing device, an air-flow-producing apparatus (1), which is arranged on a transport path of the thread extending from the thread-providing apparatus to the thread-processing unit, produces an air flow acting on the thread and having a flow direction that has a direction component opposite the thread transport direction and/or a direction component perpendicular to the thread transport direction in order to thereby keep the tension of the thread as constant as possible in the section of the transport path of the thread between the air-flow-producing apparatus and the thread-processing unit.

Description

Textile machine with uniform thread tension Description

The invention relates to a textile machine and to a corresponding textile processing method in which one or more threads under tension are processed. In particular, the invention relates to textile machines, such as mattress knitting machines, in which the tensioned thread is processed with varying consumption.

In thread-processing textile machines, fluctuations in thread tension can cause inaccuracies or errors in processing, which in turn lead to defects in the fabric being processed. Reducing the feed rate of the yarn in the machine and the resulting processing speed may mitigate this problem; however, such a reduction is generally undesirable because it ultimately reduces the output of the machine.

A major cause of variations in yarn tension may be that the decrease in the yarn varies on the processing side. Typical examples are here with Jacquardtechnik working textile machines, in particular round or flat knitting machines with jacquard technique. In such a knitting machine, the yarn consumption varies depending on the knitted jacquard pattern: the consumption drops, shoots more thread for a short time (already due to the inertia of the thread or the feeder supplying the thread feeder). This reduces the thread tension. Under certain circumstances, the excess thread can form a loop, which due to vibration, the knitting point in a high speed, in a sense, whip-like, can achieve (so-called whip effect). There, the na- del the thread no longer, so that it comes to errors in the knit fabric produced knitwear. The faster the machine works, the more serious the problem.

Circular knitting machines, preferably mattress knitting machines, have a multiplicity of knitting systems which knit the front and the back of the mattress cover fabric with their cylindrical and rib needles. In addition, weft threads can be introduced and trapped in the knitted fabric at the knitting systems. The front side of the mattress cover fabric is often provided with varying and / or complex patterns, which can be accomplished by means of electronic jacquard control of the cylinder needles. The back side is generally simpler or not patterned so that the rib needles can each serve to support one of two knitting systems while being mechanically pre-selected or jacquard-controlled in the subsequent one. In the case of irregular interaction of the cylinder and rib needles selected individually by the jacquard control (so-called EE selection), speed factors as from about 450 (corresponding to about 12 revolutions per minute with an exemplary cylinder diameter of 38 inches) are already critical with regard to the occurrence of whip effects. With single needle selection of only the cylindrical needles (so-called E-selection), the critical speed factor is about 750 (which corresponds to about 20 revolutions per minute in the example case). In machines (such as the so-called mini-jacquard machines) in which the needle selection is performed completely mechanically, the critical speed factors are about 1000 or higher.

In conventional knitting machines, these problems are alleviated by providing the feeders with yarn brakes and yarn feelers, which then (possibly mechanically or electronically controlled) can adjust the yarn tension even with varying yarn consumption. lend should be kept constant. However, even such equipped dispensers can compensate for a sudden loss of voltage only with a certain time delay, which however can continue to be problematic, especially at high processing and feeding speeds, since whip effects can then continue to occur.

Other known approaches provide improved thread guides, with which should be prevented that the thread jumps with decreasing thread tension from the thread guide; see for example the document EP 1 939 340 A1. Also, mechanical vibration dampers in the course of the thread are known, for example from the document DE 297 03 01 1 U. But even these approaches are at high processing and delivery speeds to their limits.

We are therefore looking for a solution that ensures the highest possible thread tension even at high speeds. In particular, such a solution is intended to make textile processing at high speed possible, even with varying yarn consumption, such as in jacquard-controlled knitting machines, in such a way that, despite high speed rejects can be avoided in the knitwear produced, so that a high productivity of Machine is received.

The textile processing device defined in patent claim 1 and the corresponding textile processing method likewise defined in the patent claims solve the above problem by blowing air in one direction onto the thread in the thread run, which is completely or partially opposite or perpendicular to the thread running direction. The dependent claims describe preferred embodiments of the invention.

The air flow can be generated in particular by an air nozzle. For example, such an air nozzle can be used in the textile machine. order that the thread passes longitudinally therethrough. In this case, the thread and the air within the air nozzle are in opposite directions. However, the air nozzle or another device generating the air flow can also be arranged such that the direction of the air flow of the thread running direction is only partially opposite in the sense that a directional component of the air flow is opposite to the thread running direction. The air flow direction can also run perpendicular to the thread running direction.

An air flow opposite the thread causes the thread on the thread processing side in the thread running direction down the air flow device tightens. Any loops or loops of the thread resulting from the excess thread remain on the thread feed side in the thread running direction upward of the air flow device, while a uniform thread tension can be ensured for the thread processing even at high speed.

A corresponding air flow device with an air nozzle can also be designed in a way that allows the direction of the air flow to be reversed. This has the advantage that the thread can then be more easily inserted into the air nozzle before the textile machine is taken up or resumed thanks to the resulting suction effect.

When the yarn course direction and the air flow direction are parallel or antiparallel to each other, the air flow device must be arranged so that the thread is transported through the air nozzle to thereby be exposed to the counter-current air flow. Due to the compressed air connection behind the nozzle, a further deflection of the thread between the air nozzle and the knitting point or thread guide hole to the knitting point may be necessary. To Provide the compressed air connection, necessarily common thread and air flow channel and the other Fadenum- steering is therefore required a certain distance from the knitting point.

Therefore, it may be advantageous to blow the air onto the yarn in a direction substantially perpendicular to the yarn advancing direction. In this case, the undesirable whip effects closer to the knitting point can be prevented; Namely, these are caused, in particular in jacquard-controlled knitting machines, typically by a suddenly reduced thread requirement at the knitting point and then propagate from there counter to the thread running direction.

The vertical air flow can be opposite to the opposite

Advantage of a better power transmission to the thread. If the thread has a smooth surface, with tangential friction force transmission from the air flow to the oncoming thread, a larger amount of compressed air is required to keep the thread evenly taut in case of voltage drop

A transverse air flow acting on the thread, which runs at least partially perpendicular to the yarn transport direction, can therefore ensure a constant yarn tension at high processing speeds and largely independent of surface and material properties of the yarn and effectively reduce whip effects at the knitting point, without the arrangement of the machine elements along to complicate the thread course overly. The emergence or propagation of whip effects can already be prevented directly at the knitting point or at least close to it. Particularly in textile processing at high speed and varying yarn consumption, such as in jacquard-controlled knitting machines, it is thus possible to avoid scrap in the produced knitwear despite high processing speed and to ensure high productivity of the machine. The transverse air flow can be generated with an air nozzle arranged on one side of the transport path of the thread. On the opposite side of the nozzle, a loop receptacle for receiving the thread loop resulting from a voltage drop of the thread can be provided. This loop receptacle can be formed as a slot-shaped opening in an air nozzle with respect to the transport path of the thread opposite side wall (wherein such opening may also have a different shape and may be, for example, round, oval, rectangular or square). The air nozzle and the loop receptacle can be designed as separate machine components from each other; or they may both be parts of an integrally formed air flow device.

It is advantageous to provide the air nozzle as close as possible to the textile processing station, in particular shortly before (with respect to the yarn advancing direction) of the textile processing station. Thus, the air nozzle may be arranged in front of the thread guide hole leading to the textile processing parts, or at least in front of the preceding last thread guide or thread deflection element on the thread transport path. It is also conceivable to provide the air nozzle immediately in front of the textile processing station, so that the thread runs without further deflection to the processing point. In the direction of yarn flow opposite direction of air flow, it has proved to be particularly advantageous to arrange the air nozzle 20 mm or less, in particular 15 mm or less, before the last thread guide device, as has been shown that in this way the voltage behind the air nozzle (on the processing side) can be kept particularly well at a uniform level. A distance of about 10 mm has proven particularly useful.

When the direction of air flow is transverse to the direction of yarn flow, the air nozzle can be supplied with compressed air in an unproblematic manner, without resulting in valuable space in the course between the air nozzle and the processing. would be lost. It has proven particularly advantageous to provide the air nozzle or the center of the loop receptacle at a distance of less than 5% of the needle cylinder diameter to the textile processing station. A distance of about 3 cm with a needle cylinder diameter of 38 inches (96.5 cm) has proven to be particularly useful. A cross-flow nozzle consumes less compressed air while still maintaining stable and reliable thread tension.

The position of the air nozzle can also be designed to be displaceable along the yarn transport path, for example by being fastened to a rail and being able to be moved thereon. The air nozzle can also be provided pivotably, in particular with regard to improved handling or to allow access to the thread guide or the knitting area. The displacement (and / or pivoting) of the air nozzle can then be done manually or automatically controlled. Since the whip effect and the formation of loops are at least partially a vibration-related phenomenon that can vary with speed, nature and base tension of the thread as well as with the distances of the thread guide elements, can be with a position adjustable air nozzle particularly well depending on the circumstances optimal result in terms of Uniformity of thread tension obtained behind the air nozzle.

In the positionability of the filament nozzle more degrees of freedom can be provided so that the air nozzle not only moved along the yarn transport path but also positioned in the direction perpendicular to the yarn transport path level and can be pivoted in their orientation. For this purpose, various types of air nozzle holders are conceivable that provide such displacement and Verschwenkungsmöglichkeiten. In this case, the exact direction of air ejection can be adjustable or controllable, from one to the thread running direction vertical direction up to one in or against the thread running direction.

In addition, when the air nozzle is positioned or pivoted out of the yarn transport path, it may effectively act as another yarn guide member by being configured to deflect the yarn within the air nozzle.

The air discharge of the air nozzle can be constant; but it can also be manually adjustable or controlled automatically. Both static and dynamic controls are possible here. For example, the control of the air ejection may be tuned with the control of the jacquard pattern processing. If multiple air nozzles are provided within a textile machine, the air ejection for the air nozzles can be controlled jointly or individually.

Instead of through an air nozzle, the air flow can also be guided by tubes with a constant or varying diameter of the thread. In principle, a fluid other than air can also be blown onto the thread, for example another gas or a gas mixture in which a means for surface treatment, dyeing or impregnation of the thread is atomized.

Finally, the air nozzle of the present invention can be applied to various types of textile machines that process a thread under a certain tension. These are, for example knitting, knitting, weaving or sewing machines or machines for rewinding or further transporting a thread.

Mattress knitting machines with a high speed factor (ie, high circumferential speed of the needle cylinder) have proven to be a particularly advantageous application example. Such machines have a variety of knitting systems with corresponding knitting points, each paired with Knit the cylinder and rib needles on the front and back of the mattress cover fabric. On the front of the fabric often complex or varying knitting patterns are desired, so that here is a pattern-dependent interplay of cylinder and Rippnadeln used. The cylinder needles are electronically selected individually by jacquard control (for E and EE selection). For the back side of the mattress reference, which is generally simpler or not patterned, a simpler knitting technique is sufficient so that the rib needles selected mechanically (E-selection) or electronically (EE-selected) on each second knitting system maximally Concentration can remain. In addition, the introduction of a weft thread in the fabric of the mattress fabric at each corresponding knitting system pair is also conceivable.

The irregular pattern-dependent interaction of the cylinder and rib needles in such a mattress knitting machine, in which both are actively involved in the knitting process, can, at high speed factors, cause the occurrence of whip effects to be increasingly observed. The resulting large fluctuations in the thread tension lead to considerable impairment of the knitting processes, which ultimately can only be controlled with a reduction of the speed factor. For example, in a mattress knitting machine with a needle cylinder of 38 inches and electronic jacquard selection, a speed factor of 760 (equivalent to 20 revolutions per minute) is critical only on the cylinder. With jacquard selection on the cylinder and on the dial, the critical speed factor is already 456 (equivalent to 12 turns per minute).

The present invention makes it possible to maintain the knitting quality of such a mattress knitting machine even at high speed factors (above the above critical values). For this it may already be sufficient to provide the air nozzles according to the invention on every other knitting system, namely, exactly on the knitting systems, where due to the pattern-dependent interplay of cylinder and Rippnadeln the yarn consumption varies in particular. On the knitting systems, where the Rippnadeln are predominantly in the concentricity, the thread consumption is more uniform, so that the air jets are not necessarily needed here.

The invention will be explained in more detail with reference to the drawings. Showing:

Figure 1 is a side view of a knitting machine according to the invention;

FIG. 2 shows a perspective view of the region of the air nozzle, the thread guide and the knitting needles of the knitting machine according to a first exemplary embodiment;

Figure 3 is another perspective view of the same area of the knitting machine;

Figure 4 is a perspective view of the portion of the air nozzle and the yarn guide of the knitting machine;

Figure 5 is a sectional view of the air nozzle according to the first embodiment;

Figure 6 is a perspective view of the air nozzle;

FIG. 7 shows a perspective view of the air nozzle together with the air nozzle holder and

8 shows another perspective view of the air nozzle together with the air nozzle holder according to the first embodiment.

9 shows a perspective view of the air nozzle according to the invention according to a second embodiment;

Figure 10 is a side view of the air nozzle according to the second embodiment;

Figure 1 1 is a perspective view of a knitting system with the air nozzle and cylinder and Rippnadeln in operation. Figure 12 shows a snapshot of the needle positions at a knitting point with knitting cylinder and Rippnadeln;

FIG. 13 shows a snapshot of the needle positions at a knitting point with knitting cylinder needles and round ribs remaining in the concentricity; and

Figure 14 is a perspective view of a pair of knitting systems of a mattress knitting machine with weft feeder according to the second embodiment.

Hereinafter, with reference to the drawings, jacquard circular knitting machines will be explained as examples of textile processing apparatuses and methods according to the present invention.

In a circular knitting machine, yarns from yarn feeding devices are fed to a rotating knitting tool carrier, whose knitting tools then process the yarns as knitting elements at the knitting points associated with the respective yarns. The processing of the thread takes place under tension, so that in particular in Jacquard knitting machines with varying yarn consumption during processing positive yarn feeding devices or feeders are used, which provide the thread without slippage.

Figure 1 shows the transport path of the thread F in a Jacquard circular knitting machine according to the invention from the feeder 3, which removes the thread from the thread spool and caches on his thread storage 3d, one or more thread guide elements 5 and finally a thread feed bore of a thread guide to the knitting point. At the knitting point, the thread is then processed by the arranged on a rotating carrier knitting tools for stitch formation. In the present exemplary embodiment, it is horizontal on an ner Rippscheibe and vertically arranged on a needle cylinder knitting needles.

On the one hand, the processing of the yarn at the knitting point requires the most uniform possible tension; On the other hand, however, in a jacquard knitting machine, depending on the selected jacquard pattern, the yarn consumption at the knitting point varies. The purpose of a constant or at least uniform yarn tension, which is a demanding task, especially with varying yarn consumption, serve in the exemplary embodiment of the feeder 3 and the air nozzle 1.

The feeder 3 is provided with a yarn brake 3a and yarn running sensors 3b,

3c to regulate the thread tension and not to let too much thread nachschießen even with suddenly decreasing thread consumption. At high feed and processing speeds, however, the feeder reaches its limits; due to its inertia, in particular that of its rotating yarn storage wheel, a sudden drop in yarn consumption can cause too much thread to shoot. The consequence of this is a momentary loss of thread tension and then, under certain circumstances, the formation of loops running up to the knitting point, which ultimately lead to knitting errors.

In order to obtain a uniform yarn tension even under such circumstances and thus to ensure reliable processing even at high speed, in a first embodiment of the invention, an air nozzle 1 is provided, which is further down in the thread running direction in front of the knitting point. As shown in FIGS. 2 to 4, this air nozzle 1 is attached to a holder 2 provided for this purpose.

The air nozzle 1 of the first embodiment is shown in more detail in FIGS. 5 and 6. It has an air inlet opening 1 c and an air outlet opening 1 a, which also serves as a thread inlet opening. The thread F passes through the air nozzle through a straight thread channel from the thread inlet opening 1 a to a likewise provided thread outlet opening 1 b. The air is guided in the air nozzle 1 from the air inlet opening 1 c in an air flow channel, which then bends into the thread channel, so that the part of the thread channel from this inflection to the Luftauslass- and Fadeneinlauflauföffnung serves equally as Luftströmungs- and thread channel , In the middle of this common channel part of the thread F is guided in the opposite direction to the air flow, as shown by the corresponding arrows in Figure 5. As a result of friction on the surface of the thread which encounters it, the air flow exerts a force directed counter to the direction of transport of the thread onto the thread.

If, for example, a decrease in the yarn consumption at the knitting point causes a sudden loss of thread tension which can not be compensated for quickly enough by the yarn brake of the feeder, the air nozzle ensures that the excess thread on the thread feed side of the air nozzle 1 (ie on the side of the thread inlet opening 1 a) remains. On the yarn processing side of the air nozzle 1 (that is, on the side of the yarn discharge opening 1b), a yarn tension sufficient for reliable knitting processing is maintained by the frictional force exerted on the yarn by the air flow of the air nozzle. The amount of thread tension maintained can be adjusted by the strength of the air flow as well as the design and positioning of the air nozzle so that it is as uniform as possible and sufficient for the appropriate processing.

As shown in Figure 5, the diameter of the common channel portion for thread and air flow tapers to Fadeneinlauf- and air outlet opening 1 a, so as to increase the air flow velocity and thus the frictional force on the thread at the opening. But it is also bar, the diameter of the air flow passage in the air nozzle to leave constant (or even widen), if the air nozzle can thereby obtain the thread tension to the desired extent. In addition, in this embodiment, other nozzle shapes are conceivable or even an open fan, which blow the air so on the thread or make that on the thread surface directed against the threadline friction force is exerted (with a positive direction component opposite the thread running direction) ,

FIGS. 7 and 8 show the attachment of the air nozzle 1 to the air nozzle holder 2. The mounting of the air nozzle shown there by means of a rotatable and screw-fixable rod and two metal sheets, which are provided with oblong holes and are likewise fixed with screws, permits a free and flexible pivoting and positioning of the air nozzle not only along the thread running direction but also in the plane perpendicular thereto. The holder shown in Figures 7 and 8 is to be understood only by way of example: other configurations of the brackets, which optionally full or limited positioning, for example, only along the thread trajectory, allow are conceivable, as well as a holder in which the air nozzle in one fixed and unchangeable position.

On its way from the feeder 3 to the knitting point, the thread can also be guided over one or more thread guide or deflection elements 5 changing the course of the thread before it enters the thread feed bore 6 of the thread guide. In this embodiment, such a thread guide element 5 is arranged between the air nozzle 1 and the thread supply bore 6 to the knitting point. Such a thread guide element may be part of the yarn guide or be attached independently of it. It has proved to be advantageous for the air nozzle 1 and the last such thread guide element 5 in the yarn threading direction to have a To arrange spacing, for example 10 mm, to each other. However, the air nozzle can also, for example, when it is moved out of the original thread path and the thread changes its direction of travel when crossing the air nozzle, serve itself as the sole or as an additional thread guide element.

Another conceivable function of a correspondingly controllable air nozzle in this embodiment may also be the reversibility of the air flow. This would have the advantage that at the thread inlet opening a suction effect can be formed, which facilitates the manual insertion of a thread when receiving or resuming the operation of the knitting machine.

In a second exemplary embodiment, which will be described below with reference to FIGS. 9 to 14, an air nozzle 1 is provided together with a loop receptacle, which are respectively arranged in front of the knitting point in the thread running direction, also for the purpose of maintaining a uniform thread tension and thus ensuring reliable processing even at high speed.

Figures 9 and 10 show the air nozzle 1 in a perspective and in a side view. The thread passes through the air nozzle through a straight thread channel from the thread inlet opening 1 a to a likewise provided thread outlet opening 1 b (see Figure 10). The air nozzle 1 has perpendicular to the thread channel an air inlet opening 1 c (see Figure 10) and this opposite a slot-shaped loop receptacle 1 d, which also serves as an air outlet on. By friction on the surface of the passing thread, the air flow exerts a force directed perpendicular to the direction of transport of the thread on the thread.

Occurs now, for example, by a decrease in the thread consumption at the knitting point, a sudden loss of thread tension, which can not be compensated quickly enough by the yarn brake of the feeder, Thus, the air nozzle ensures that the excess thread forms a loop opposite the air nozzle in the loop receptacle 1 d. On the yarn processing side of the air nozzle 1 (ie, on the side of the yarn discharge opening 1b), a yarn tension sufficient for reliable knitting processing is maintained by the frictional force exerted on the yarn by the air flow of the air nozzle. The amount of thread tension maintained can be adjusted by the strength of the air flow as well as by the design and positioning of the air nozzle and the loop holder so that it is as uniform as possible and sufficient for the appropriate processing. Because the air flow hits the thread perpendicularly, the force ultimately transferred to the thread by the air flow is less dependent on the material and surface properties of the thread than in the case where the air flow is opposite to the thread running direction.

The thread can also be performed in this embodiment on its way from Supplier 3 to the knitting point through one or more the thread running direction changing Fadenführungs- or deflecting elements 5 before it enters the yarn feed bore of the yarn guide. However, it has proved to be advantageous to provide the air nozzle 1 with the smallest possible distance, for example less than 5% of the needle cylinder diameter, for example 3 cm at a diameter of 38 inches (96.5 cm), to the knitting point.

The air flow direction with respect to the thread running direction may also vary in this embodiment. For example, this can be set to a different angle of 90 ° to the thread running direction.

Both in the first and in the second embodiment, the air supply of the air nozzle can be made controllable, so that the air flow can be adjusted according to the respective requirements, for example can be determined by the nature, the feed rate and the base tension of the thread as well as the thread guide within the knitting machine. It is also possible to control the air supply of the air nozzle in coordination with the jacquard control of the knit stitch by, for example, the air flow is automatically increased, if due to the jacquard control a decrease in the thread consumption is foreseeable. In this way, the air nozzle can provide a voltage compensation adapted to the current need at all times.

Circular knitting machines generally have a large number of knitting stations, each with its own thread feeders, of which only one is shown here by way of example in the figures. In this case, the thread feeds of all or even only one of the knitting points can be equipped with the air nozzle described above in both embodiments. The air supply of the air nozzles as well as the control of the air flow rate and the positioning of the air nozzles can be provided individually or jointly for the different knitting points.

Of particular interest here are circular knitting machines suitable for double-jersey knitting with a rotating dial in addition to the rotating needle cylinder. Figure 1 1 shows a knitting system at a knitting point of such a machine (here with the air nozzle according to the second embodiment of the invention). The interplay of the vertically arranged cylinder needles 7 and the horizontal Rippnadeln 8 determines the current thread consumption. If the needles, for example only the cylinder needles (E-selection) or both the cylinder and the knurling needles (EE-selection), are individually selected electronically to produce patterns in the jacquard knit fabric, then the current yarn consumption will vary considerably. In the event of a sudden decrease in yarn consumption, the air flow from the air nozzle 1 ensures that the excess thread in the Loop recording 1 d forms a loop, while an excessive decrease in the thread tension at the knitting point is prevented or at least mitigated.

When knitting mattresses, the front of the fabric is often patterned while the structure of the fabric on the back is kept simple. In a corresponding knitting machine for mattress cover fabrics, therefore, at least the cylinder needles are selected with jacquard technique with regard to the patterning on the front (for example, with electronic Einzelelnadelauswahl), while the electronically or mechanically selected Rippnadeln remain at every other knitting predominantly in the concentricity. Figure 12 shows a snapshot of the positions of the cylinder needles 7 and the Rippnadeln 8 at such a knitting point: the cylinder needles are selected individually and also the Rippnadeln participate in the knitting process (either also by electronic see Einzelelnadelauswahl or controlled by mechanical preselection). Due to the pattern-dependent interplay of the cylinder and Rippnadeln the yarn consumption varies considerably on these systems. The provision of air nozzles according to the invention (for example, those of the first or the second embodiment) leads here to significant improvements in terms of maintaining the thread tension.

On the other hand, the knitting operation on the knitting systems, where the rib needles are predominantly in the concentricity, is simpler and more uniform. FIG. 13 shows a corresponding snapshot of the needle positions on such a system: the cylinder needles knit here in unison, while the rib needles remain in the concentricity. Fluctuations in yarn consumption are lower here. An equipment of these knitting systems with the air nozzles according to the invention (and corresponding air supply lines) is no longer absolutely necessary. Figure 14 shows a pair of knitting systems of a mattress knitting machine according to the invention, of which the right is equipped with an air nozzle 1 (here according to the second embodiment), while the left has no such air nozzle. In addition, a weft thread S is fed between the two knitting systems, which - as is often the case with mattresses - is inserted into the knitted fabric at the knitting point or between the knitting points.

The above-described advantages in the implementation of the present invention in a mattress knitting machine also apply to other knitting machines having a plurality of knitting systems in which the processing of the front side and the back side places different demands on the adjustment of thread tension fluctuation.

The above embodiment describes a jacquard circular knitting machine. However, it will be appreciated that the air nozzle described above may also be used in other textile machines in which a thread (or a plurality of threads) is processed under tension or even transported. The maintenance provided by the air nozzle and improved uniformity of yarn tension is also in textile machines with constant yarn consumption advantage; However, these advantages are particularly pronounced when thread tension losses due to varying yarn consumption can be compensated with the aid of the air nozzle. Examples of textile machines in which the invention can be implemented are knitting, knitting, weaving or sewing machines as well as machines for rewinding or further transporting a thread.

A particularly preferred embodiment of the present invention relates to a mattress knitting machine with electronic feeder and 60 knitting systems (knitting points), each of which is equipped with an air nozzle and loop holder according to the second embodiment is. With a needle cylinder diameter of 38 inches (96.5 cm) and a peripheral speed of 30 rpm, the result is a speed factor of 1 140. On all systems, the cylinder needles are individually selected electronically and the rib needles mechanically selected (E-selection). While the respective systems without air nozzle only use rib needles for support and have weft feeds, both the jacquard-controlled cylinder needles and the rib needles are involved in the knitting process in the adjacent systems. These systems are therefore equipped with air nozzle and loop holder. Due to the high speed, high acceleration values can be observed on the thread. The air nozzles and loops of the present invention are found to be particularly effective in avoiding whip effects and ensure reliable and efficient operation of the machine. LIST OF REFERENCE NUMBERS

F thread

1 air nozzle

1 a thread inlet opening

1 b thread outlet opening

1 c air inlet opening

1 d loop recording

2 air nozzle holder

3 Supplier

3a thread brake

3b thread inlet sensor

3c thread outlet sensor

3d thread storage wheel

4 knitting tools Thread guide element Thread feed hole Cylinder needles

dial needles

weft

Claims

claims

1 . Textile processing device with

a thread processing unit for processing a tension under tension (F) with varying thread consumption,

a thread supply device (3) for providing the thread for the yarn processing unit and

an air flow generating device (1) which is arranged on one of the yarn supply device to the yarn processing unit extending transport path of the thread and is adapted to produce an air stream acting on the thread with a flow direction, the direction of the yarn transport direction opposite direction component and / or a to The direction of yarn transport direction perpendicular direction component, in order to keep the tension of the yarn in the portion of the transport path of the yarn between the air flow generating device and the yarn processing unit as constant as possible.

2. textile processing device according to claim 1,

wherein the flow direction of the air flow generated by the air flow generating device (1) has a direction component opposite to the yarn transport direction and is preferably substantially parallel and opposite to the yarn transport direction.

3. textile processing device according to claim 1 or 2,

wherein the air flow generating means concentrically around the

Transporting the thread (F) arranged around the air nozzle (1), wherein the air flow through a nozzle opening (1 a) is ejected, through which the thread is guided during its transport into the nozzle interior.

4. textile processing device according to claim 3,

wherein the air nozzle (1) further comprises a further opening (1 b), through which the thread (F) is transported out of the nozzle interior on its transport path, and an air supply opening (1 c) for supplying air.

5. textile processing device according to one of the preceding claims,

wherein the air flow generating means (1) is formed so that the direction of the air flow can be reversed.

6. textile processing device according to claim 1,

wherein the flow direction of the air flow generated by the air flow generating means (1) has a direction perpendicular to the yarn transport direction direction component and preferably substantially perpendicular to the yarn transport direction, thereby to decrease in the tension of the yarn in the portion of the transport path between the air flow generating device and the Thread processing unit laterally to the yarn transport direction to form a thread loop.

The textile processing apparatus according to claim 6, wherein the airflow generation means comprises:

a on one side of the transport path of the thread (F) arranged air nozzle (1) for generating the air flow and

a arranged on the opposite side of the transport path of the thread loop receptacle (1 d) for receiving the thread loop resulting from a drop in tension of the thread.

8. textile processing device according to claim 7,

the loop receptacle (1 d) being an opening in a side wall opposite the airway (1) with respect to the transport path of the thread (F), the opening being preferably slot-shaped, oval, round, rectangular or square, and wherein the air flow generating means with air nozzle (1) and loop receptacle (1 d) is preferably formed in one piece.

9. textile processing apparatus according to any one of claims 3 to 8, further comprising

an air nozzle holder (2) on which the air nozzle (1) is mounted in such a way that it is displaceable in different spatial directions and is pivotable in its spatial orientation.

10. Textile processing device according to one of the preceding claims,

wherein the air flow generating means (1) is slidably disposed along the transport path of the thread (F).

1 1. A textile processing apparatus according to any one of the preceding claims, further comprising

at least one thread guide or thread deflection element (5) on the transport path of the thread (F) between the thread supply device (3) and the thread processing unit,

wherein the air flow generating means is arranged either in front of or behind the last with respect to the yarn transport direction Fadenführungs- or Fadenumlenkelement on the transport path of the thread.

12. Textile processing device according to claim 1 1,

wherein the air flow generating means (2) has a distance of 20 mm or less, preferably 15 mm or less, particularly preferably about 10 mm, to the last thread guide or Fadenumlenkele- element (5) on the transport path of the thread (F).

13. A textile processing apparatus according to any one of the preceding claims, further comprising an air nozzle controller, which is adapted to control the air flow of the air flow generating means, preferably to control in coordination with or in response to the control of the textile processing.

14. Textile processing device according to one of the preceding claims,

wherein the yarn supply device is a feeder (3) with its own yarn brake (3a) and / or yarn tension regulation device (3b, 3c).

15. Textile processing device according to one of the preceding claims, which is a circular knitting machine, preferably a mattress knitting machine for knitting mattress bezugsstoff running circular knitting machine is.

16. Circular knitting machine according to claim 15 having a rotating needle cylinder and a plurality of knitting systems arranged around the needle cylinder,

wherein on all knitting systems or only on some of the knitting systems, preferably on each second knitting system, an air flow generating device is provided.

17. Circular knitting machine according to claim 16,

wherein the needles (7) of the needle cylinder on the knitting systems equipped with air flow generating means (1) are either electronically selected individually by jacquard technique or mechanically preset.

18. Circular knitting machine according to claim 17,

wherein the needles (7) of the needle cylinder on the knitting systems not equipped with air flow generating means are also selected electronically individually or mechanically preset by means of jacquard technology either.

19. Circular knitting machine according to claim 17 or 18, further comprising a ribbed (8) supporting rotating dial,

wherein the Rippnadeln the dial to the air flow generating device (1) equipped knitting systems either also by Jacquard electronic individually or mechanically preset are selected.

20. Circular knitting machine according to one of claims 17 to 19 further comprising a Rippnadeln (8) supporting rotating dial,

wherein the Ripp needles of the Rippscheibe remain on the not equipped with air flow generating device knitting systems in the concentricity.

21. Circular knitting machine according to one of claims 15 to 20, further comprising a weft feeder for feeding a weft thread (S) to be inserted into the knitted fabric.

22. Circular knitting machine according to one of claims 19 to 21, for a processing speed with a speed factor of at least 400, preferably at least 500 and more preferably at least 600, in the case of single electronic needle selection on the needle cylinder and the dial, at least 700, preferably at least 800 and especially preferably at least 900, in the case of electronic single needle selection only on the needle cylinder and at least 1000, preferably 1 100 and particularly preferably at least 1200, in the case of mechanically preset needle selection on the needle cylinder and the dial is designed.

23. Textile processing device according to one of claims 1 to 14, which is a knitting, knitting, weaving or sewing machine or a machine for rewinding or further transporting a thread (F).

24. textile processing method comprising the following steps:

Transporting a tensioned thread (F) from one

Yarn feeding device to a yarn processing unit; and

Processing the yarn with varying yarn consumption at the yarn processing unit,

wherein an air flow is blown onto the thread on its from the thread supplying device to the thread processing unit extending transport path, wherein the air flow has a flow direction having a direction opposite to the yarn transport direction direction component and / or ne ne to the yarn transport direction directional component, in order to the tension of the thread to keep the thread processing unit as constant as possible.

25. textile processing method according to claim 24, wherein the flow direction of the air flow blown onto the thread has a direction component opposite to the thread transport direction and preferably runs essentially parallel and opposite to the thread transport direction.

26. textile processing method according to claim 24,

wherein the flow direction of the air flow blown on the thread has a direction perpendicular to the yarn transport direction direction component and preferably substantially perpendicular to the Fadentransportrich- direction, thereby forming a thread loop laterally to the yarn transport direction at a drop in the tension of the thread at the yarn processing unit.

27. textile processing method according to any one of claims 24 to 26,

wherein a plurality of yarns of corresponding plural knitting systems arranged around a rotating needle cylinder are processed into a knit fabric,

wherein on all knitting systems or only on some of the knitting systems, preferably on each second knitting system, in each case a stream of air is blown onto the corresponding thread.

28. textile processing method according to claim 27,

the needles (7) of the needle cylinder on the knitting systems being selected electronically individually or mechanically pre-set either by jacquard technique, the type of yarn selection being applied to all knitting systems where air flow is applied to the yarns and to all knitting systems where no air flow is blown on the threads is equal.

29. textile processing method according to claim 28,

wherein rib needles of a rotating dial are selected electronically individually or mechanically preset by means of jacquard technology at each knitting system, wherein the rib needles on the knitting systems, where no air flow is blown onto the filaments, preferably remain in concentricity.

30. textile processing method according to claim 27 to 29,

wherein at each knitting system fed a weft and in the

Knitted fabric is inserted.

31. Textile processing method according to claim 29 or 30 having a speed corresponding to a processing speed of at least 400, preferably at least 500 and more preferably at least 600, in the case of electronic single needle selection on the needle cylinder and the dial, at least 700, preferably at least 800 and more preferably at least 900, in the case electronic single needle selection only on the needle cylinder and at least 1000, preferably 1 100 and more preferably at least 1200, in the case of mechanically preset needle selection on the needle cylinder and on the dial.