WO2009033697A1 - Device for the production of fancy yarn - Google Patents

Abstract

The invention relates to a device (1) for the production of fancy yarn during the texturizing of yarn by creating flames by way of short-term yarn transfer, having a motor-driven linear carrier (4) that can be moved away from the grain (35), wherein the carrier (4) has a thread guide (9) in order to create a yarn under-delivery by gripping a thread (2) of the yarn by way of the thread guide (9) and by lateral deflection of the yarn from the grain (35) thereof. For this purpose, trigger means (10) are provided, which are configured to release the thread (2) from the thread guide (9) at a deflection point positioned laterally from the grain (35) of the thread (2) in order to create the yarn delivery by means of abrupt termination of the deflection of the yarn. The trigger means (10) form a ramp, wherein the ramp is positioned such that the thread (2) can be pushed onto the ramp in the region of the deflection point by means of the thread guide (9), wherein the thread (2) may be lifted out of and/or lifted out above the thread guide (9) by pushing the same on for the release thereof. The device functions in a manner that is independent of the thread tension.

Description

 Device for producing effect yarns

The invention relates to a device for producing effect yarns (flame aggregate) in the texturing of yarn by generating flames by short-term Garnüberlieferung, with a motor driven linearly movable away from the yarn path carrier, wherein the driver a

Has yarn guide to produce by gripping the yarn with the yarn guide and lateral deflection of the yarn from the yarn path, a Garnunterlieferung; and a yarn processing machine having such a device and a texturing unit, e.g. with an air texturing nozzle (air texturing machine).

When air texturing filament yarns, usually in the fully stretched state (FDY, Fuji Drawn Yarn), by means of a swirl nozzle (Lufttexturierdüse) imparted a lumpiness. At least two yarns are connected with each other. It is at least a so-called core yarn and at least one so-called effect yarn, which is arranged by the air texturing around the core yarn around. If this loft changes in the course of the thread, it is called a fantasy yarn, otherwise a so-called textured yarn. The core yarn determines the strength of the fantasy yarn. The effect yarn determines the tactile properties of the fantasy yarn, eg its bulkiness. The bulk of the fancy yarn is further determined by the relative speeds at which the yarns enter the air-texturing die. The more effect yarn per length of coregarn enters the air-texturing nozzle, ie the faster the effect yarn runs into the air-texturing nozzle relative to the core yarn, the fluffier the yarn produced becomes. In air texturing, it is known to vary the bulk of the yarn produced. For this purpose, the amount of yarn provided at the inlet of the air-texturing nozzle is varied per unit of time, ie the entry speed of the effect yarn is varied. Devices for this purpose are known, for example, from EP 1 544 333 A1 or EP 1277860 A1. In principle, a yarn excess (area of a yarn overfeed) and a yarn shortage (area of a yarn underdelivery) are alternately provided for a short time at the entrance of the air-texturing nozzle, relative to a constant running-in speed. This yarn excess leads to a thickening of the yarn produced at the point on the thread where the excess yarn was present, ie there, the thread has a greater bulkiness. The thickenings thus produced are called flames.

In the devices of EP 1 544 333 A1 and EP 1277860 A1, the yarn excess is provided by means of a linearly reciprocating linearly perpendicular to the yarn path of the effect yarn

Thread deflection mechanism with a driver, the effect yarn alternately stretched and relaxed. During clamping, the entry speed of the fancy yarn into the air-texturing nozzle is slowed down, in order to increase again when relaxing. In these devices, the yarn is constantly guided during the reciprocating movement of a thread guide of the driver. Characterized that the mass of the driver is constantly accelerated by reversing the direction of movement of the driver, the production of very short flames limits.

Another generic device is disclosed in US 3,025,563. In this device, a driver is mounted on a traversing element, wherein the traction element is set to rotate around deflections for motor drive of the driver. An angled thread guide fastened to the driver deflects the thread from its thread run until the thread reaches an upper thread as a result of the thread tension rising during the deflection Edge of the thread guide slips, whereby the thread is released and snaps back into the threadline. The length of the deflection (Auslenklänge) of the thread from the yarn path is determined by a necessary to release thread tension. The Auslenklänge is therefore directly related to the thread tension and the geometry of the executed as a curved pencil thread guide. A specification of a defined deflection length is therefore only conditionally possible, so that a barre effect can occur in the case of tissue woven from an effect yarn produced with this device. Barre effect refers to a faulty stiffness in fabrics made of chemical fibers.

The invention has for its object to provide an apparatus for producing flames in the air texturing of yarns, which avoids the disadvantages of the prior art and with the particular very short flames are generated.

This object is solved by the device of the independent claim. The dependent claims represent preferred embodiments of the invention.

In a device according to the invention for producing effect yarns in the texturing of yarn by generating flames by short-term yarn delivery is a motor driven linear away from the yarn path, ie substantially rectilinear, preferably perpendicular to the yarn path, movable driver available. This driver has a yarn guide to produce by Garn, ie also only detecting, a yarn of the yarn with the yarn guide and lateral deflection of the yarn from the yarn path, a Garnunterlieferung. According to the invention release means are provided which are adapted to the thread at a deflection point lying laterally from the thread run of the thread release the thread guide to produce the Garnüberlieferung by abrupt termination of the deflection of the yarn.

In this case, the release means form a ramp, wherein the ramp is positioned such that the thread can be pushed onto the ramp in the region of the deflection point by means of the thread guide. The ramp is understood to mean a surface which is oblique to the direction of movement of the driver. The thread can be lifted out of the thread guide by being pushed on to release it and / or can be lifted away via the thread guide. The yarn guide is thereby moved by the driver relative to the triggering means, i. the ramp, moving. That the ramp is an additional component to the thread guide, which is independently positioned or positionable by the thread guide.

In this way, the thread can be released in a very simple way independent of the thread tension. The triggering means may e.g. simply be rigidly mounted as a rigid part in the region of the deflection point or else be electromechanically adjustable in order to produce flames of different sizes, e.g. in a periodically repeating deflection cycle of the thread in the effect yarn manufacturing process. The length of the lateral deflection of the thread from its threadline is detached from the thread tension of the thread. The Auslenklänge is therefore independent of the thread tension of the auszulenkenden thread and can be adjusted exactly by the position of the ramp.

The inventive device is in front of a texturing unit a

Gambearbeitungsmaschine, in particular a Lufttexturierdüse an air texturing machine, mounted in the yarn path at least one of the effect yarns. By means of the driver, the thread of the filament yarn is stretched by the lateral deflection and then released much more quickly by releasing by means of the release means. As a result, at the entrance of the air-texturing nozzle, for example, a brief excess of yarn occurs, which leads to a stronger texturing, ie to form a relatively increased to the remaining yarn bulkiness of the yarn, ie a so-called flame leads. The flame length and the flame stroke, which are determined by the length of the yarn, which is additionally supplied during the phase of the short yarn excess of eg air-texturing, determined by the duration of the deflection and the amount of deflection of the yarn from the yarn path. The flame stroke is the thickness of a flame. The recoil of the thread after its release makes it possible to achieve a yarn overfeed with a large excess of yarn in a very short time (transfer duration). The transmission period is not limited by limiting factors of movement of a device part of the flame unit. It can be produced in a simple manner so very voluminous and short flames. The size of the yarn excess is determined by the length of the extension of the yarn path of the yarn by the deflection. It thus results from the difference in length of the yarn path of the yarn with complete deflection at the deflection point to the length of the yarn path without deflection. With the flame unit according to the invention can be achieved in a simple manner, a very large difference in length. With the device according to the invention, the production parameters of such flames can be easily adjusted. The length of the normal textured yarn, ie the distance between the flames, is determined by the frequency of deflection by means of the driver and / or the speed with which the yarn enters the air-texturing nozzle. The device according to the invention has a very simple construction, which leads to a very low susceptibility to failure of the device, low cost and to a reduction of thread breaks in the area of the device.

Particularly preferably, the ramp is controlled by a trigger positioner for varying the position of the deflection point controlled by a control unit displaced. The ramp is eg electromechanical, in particular throughout the ongoing yarn manufacturing process, relocatable. Trained as a ramp release means are thus preferably electromechanically adjustable in their distance from the yarn path. The deflection can be carried out periodically, so that a deflection cycle of different distances of successive deflection points is achieved controlled to the yarn path. Again, an independence of the length of the deflection of the thread at the deflection of the thread tension is given. That is, the release of the thread from the thread guide depends solely on the current position of the ramp and not on the thread tension of the thread. The control unit may be arranged to be freely programmable to vary the frequency of the deflection, ie the deflection cycle, so that the deflections of the thread from its threadline upon release of the thread from one to the other deflection cycle can be greatly altered. The deflection point can be freely selected and set for each individual deflection, ie each flame to be produced on the effect yarn. The thread of the yarn can be deflected and ejected differently at each deflection cycle, ie be released from the thread guide.

Preferably, the driver is mounted on a, preferably formed by a rope or a belt, traversing element, wherein the preferred controlled motor drive of the driver, the traversing element is set up to rotate around deflections. The structure of the traversing element thus corresponds to a belt drive. In this way, a very large deflection can be achieved with a simple structure. If the traversing element completely rotates in one direction, ie, the driver also completely rotates, the direction of movement of the drive need not be reversed in order to produce successive deflections of the thread. The number of deflections and thus the number of flames that can be generated per yarn length is then proportional to the rotational frequency of the traversing element. Of the However, driver can also reciprocate, as is the case, for example, in the devices of EP 1 544 333 A1 and EP 1277860 A1.

When the yarn guide is formed by two yarn guide edges on the driver, wherein the release means for releasing the yarn between the

To engage thread guide edges, a particularly safe release of the thread is ensured by the thread guide.

If a controller is provided, set up to control a motor drive of the driver so that flames predetermined or im

Substantially random size and / or at a predetermined or substantially random distance on the yarn, the occurrence of patterns in the processed, e.g. knitted or woven yarn can be avoided. Since the distance between two flames is determined by the rotational speed of the drive, the flames can be so variably spaced. Varying may e.g. be performed according to a predetermined function or randomly by a program control of an electronic engine control, which makes possible strong changes of the flames per deflection cycle, ie the cycle of a variation of the position of the deflection point by means of displacement of the ramp.

In a yarn processing machine according to the invention having a texturing unit, e.g. an air-texturing nozzle, and a device according to the invention for producing flames, the device according to the invention is arranged in the yarn path of a yarn to be processed in the texturing unit in front of the texturing unit.

The device according to the invention can be dimensioned so small that the device can be arranged within a protective housing of the air-texturing nozzle. The device can in the sound and splash water protection housing the Lufttexturierdüse known air texturing machines are installed. The resulting short distance between the device according to the invention and the air-texturing nozzle leads to better system dynamics of the air-texturing nozzle, ie to a more stable running of the yarn during yarn production.

The invention will be explained in more detail using an exemplary embodiment with reference to the drawings.

Figures Ia to Ic show an embodiment of an inventive

Flash unit;

FIG. 2 shows the carrier of the flame unit from FIGS. 1 in a perspective view;

FIG. 3 shows the arrangement of a flame unit according to the invention in a yarn processing machine according to the invention.

The figures of the drawings show the subject matter of the invention in a highly schematic manner and are not to scale. The individual components of the article according to the invention are shown so that their structure can be well shown.

In the figures Ia to Ic is an embodiment of a flame unit 1 according to the invention and its arrangement in a plane perpendicular to the yarn path of the yarn to be textured, shown schematically. The figures show the process of lateral deflection of a yarn 2 of the yarn from the yarn path for generating a flame during texturing of the yarn. The flame unit 1 has a driver 4 which is mounted on a cable 6 or a belt of a traversing element. The cable 6, or the belt, is guided in a manner similar to a belt drive by two deflections 8 designed as wheels. At least one of the wheels is by means of a in Figure 1 Not shown electric motor driven, so that the traversing element rotates driven with the driver 4 in the direction indicated by arrows.

The driver 4 has a yarn guide 9, by means of which, by gripping the yarn 2 during rotation of the driver 4, the yarn is linearly movable away from the yarn path, i. the thread 2 is laterally deflectable, whereby a Garnunterlieferung can be generated. This deflection of the thread 2 from the yarn path is shown in Figure Ib. The thread 2 in its original threadline is shown as a circle point with a white core. The yarn guide 9 is formed by the right in the figure edge of the driver 4. The lateral deflection of the thread 2 is symbolized by a dashed arrow in FIG. The driver 4 thus starts to produce a Garnüberlieferung from the position shown in Figure Ia in the direction of the position shown in Figure Ib. In between he comes with the current yarn, i. with the thread running laterally past a yarn-speed of a texturing process on the flame unit 1, in contact and engages or grips it with its lateral deflection in the direction of the release means 10 (trigger).

The trigger 10 forms a ramp which is positioned such that the thread 2 can be pushed onto the ramp in the region of a deflection point by means of the thread guide 9. As a result, the yarn, as shown in FIG. 1c, is lifted off the trigger 10 via the edge of the driver 4 forming the yarn guide 9, thereby elastically releasing the yarn into its yarn path present before deflection, ie into the original position shown in FIG. can snap back. The latter is symbolized in FIG. 1c by a dashed arrow. By rewinding, so the deflection of the yarn is stopped abruptly and produces the transmission of the yarn. The ramp is therefore not the driver along with the thread guide. 9 is moved, but is positioned stationary or is controlled by a trigger positioner 50 positioned so, for example, back and forth by varying the distance of the ramp from the yarn path movable. The trigger positioning device 50 is shown symbolically in FIGS. 1a and 1b by a double arrow.

Finally, the driver 4 is moved back to its position shown in FIG. 1a in order subsequently to repeat the deflection process. This can be done by reversing the direction of movement of the traversing element. However, the traversing element with the carrier 4 preferably simply revolves around the deflections, so that the rotational movement of the drive does not have to be reversed.

In Figure 2, the driver 4 of the flame unit of Figures 1 is shown in a perspective view. The driver 4 has a thread guide, which is formed by one edge 13,14 (thread guide edge) of two triangular projections on the driver 4. The ramp of the trigger shown in Figure 1 can thus between the thread guide edges

13,14 engage to lift the thread to its release on the thread guide 9 of the driver.

FIG. 3 shows the arrangement of a flame unit 1 according to the invention in a yarn processing machine according to the invention with an air-texturing nozzle 30. The arranged in a protective housing 32 Lufttexturierdüse 30 is arranged in the yarn path 35 of the yarn after the flame unit 1. The thread running direction of the yarn is symbolized by an arrowhead. The flame unit 1 according to the invention can also be arranged inside the protective housing 32. The motor 40 of the flame unit 1 drives one of the deflectors 8 designed as wheels in such a way that on a rope 6, or a belt mounted driver 4 in the direction of the arrow shown can be moved perpendicular to the yarn path 35, so that the yarn during a movement of the driver 4, linearly away from the yarn path 35, is deflected laterally. After the driver 4 has reached the trigger 10 of the flame unit 1 during its movement, the yarn is released by the trigger 10 at a trigger point and can snap back into the yarn path 35 shown in the figure.

The ramped trigger 10 is attached to a trigger positioner which has an electric motor 52 to drive the ramp e.g. is connected via a steel strip 51 to the controlled displacement. The triggering means are thus electromechanically adjustable so that in deflection cycles the Auslenklänge, i. the distance of the trigger point to the threadline, can be varied. In this case, the frequency of the deflection in a control module can be freely programmable and vary per deflection cycle. The ramp serving as a thread ejector is thus, e.g. Similar to a band gripper of a weaving machine, via the steel belt 51 connected to the electric motor 52 moves.

Proposed is a device 1 for producing fancy yarns in texturing yarn by generating flames by short term ones

Garnüberlieferung, with a motor driven linearly movable from the yarn path 35 driver 4, wherein the driver 4 has a yarn guide 9 to produce by grasping a yarn 2 of the yarn with the yarn guide 9 and lateral deflection of the yarn from the yarn path 35 a Garnunterlieferung. In this case, release means 10 are provided, adapted to release the yarn 2 at a laterally from the yarn path 35 of the yarn 2 deflection point from the yarn guide 9 to produce the Garnüberlieferung by abrupt termination of the deflection of the yarn.

The release means 10 form a ramp, wherein the ramp is positioned such that the thread 2 in the region of the deflection point by means of the thread guide. 9 can be pushed onto the ramp, wherein the thread 2 can be lifted out of the thread guide 9 by being pushed on to release it and / or can be lifted away via the thread guide 9. The device works detached from the thread tension.

The invention is not limited to the embodiments given above. Rather, a number of variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution.

Claims

claims 1. Device (1) for producing effect yarns during texturing of yarn by generating flames by short-term yarn transfer, with a motor driven linearly from the yarn path (35) movable driver (4), wherein the driver (4) a yarn guide (9) characterized in that by gripping a thread (2) of the yarn with the yarn guide (9) and laterally deflecting the yarn from the yarn path (35) to produce a Garnunterlieferung, characterized in that Trigger means (10) are provided, adapted to release the thread (2) at a laterally from the yarn path (35) of the thread (2) lying deflection point of the yarn guide (9) to produce the Garnüberlieferung by abrupt termination of the deflection of the yarn, characterized in that the release means (10) form a ramp, wherein the ramp is positioned such that the thread (2) in the region of the deflection point by means of the thread guide (9) can be pushed onto the ramp, wherein the thread (2) through the Sliding to its release from the thread guide (9) lifted out and / or over the thread guide (9) can be lifted away. 2. Device according to claim 1, characterized in that the ramp by means of a trigger positioner (50) for varying the Position of the deflection point controlled by a control unit is displaced. 3. Device according to one of claims 1 to 2, characterized in that the driver (4) is mounted on a, preferably by a cable (6) or a belt trained, traversing element, wherein the preferably controlled motor drive (35) of the driver (4) the Traversing element is set up to run around deflections (8). 4. Device according to one of claims 1 to 3, characterized in that the yarn guide (9) of two Fadenführungskaπten (13,14) on the driver (4) is formed, wherein the release means (10) are arranged for engagement between the thread guide edges (13,14) for releasing the thread (2). 5. Device according to one of claims 1 to 5, characterized in that a controller is provided, set up a motor drive (40) of the driver (4) to control such that flames of predetermined or substantially random size and / or with predetermined or essentially random spacing on the yarn. 6. yarn processing machine with a texturing unit (30) and a device (1) according to one of the preceding claims, wherein the device (1) in the yarn path (35) of a texturing unit (30) to be processed yarn in front of the texturing unit (30) is arranged , A yarn processing machine according to claim 6, characterized in that the texturing unit comprises an air-texturing nozzle (30), preferably wherein the apparatus is disposed within a protective housing (32) of the air-texturing nozzle (30).