Device for texturing yarn

Abstract

The present invention relates to a device for texturing yarn, wherein the device has a texturing nozzle (2) and an impact element (9). The texturing nozzle (2) has a nozzle inlet (3) and a nozzle outlet (4), which is connected to the nozzle inlet (3) by means of a nozzle bore (5), and a compressed air connection (7), which is connected to the nozzle bore (5). The impact element (9) is located at a distance (8) opposite the nozzle outlet (4), and the texturing nozzle (2) and the impact element (9) are arranged in a common texturing axis (1). The impact element (9) has a concave impact surface (10) directed towards the nozzle outlet (4) of the texturing nozzle (2) and an impact element outlet (18) opposite the impact surface (10). The impact surface (10) is connected to the impact element outlet (18) by an impact element bore (13).

Description

[0001] Device for texturing yarn

[0002] The present invention relates to a device for texturing yarn. The texturing of at least one continuous yarn consisting of a plurality of filaments is carried out using a nozzle pressurized with compressed air, a so-called texturing nozzle. The pressurization of the yarn with compressed air causes the filaments to swirl, forming loops within the individual filaments. These loops interlock due to the swirling action, thus altering the previously smooth structure of the yarn. The yarn passes through the texturing device at a production speed of 500 m / min or more. The compressed air is introduced into the texturing nozzle at a pressure of up to 12 bar, resulting in high energy consumption.Texturing alters or improves the properties of the garment, such as elasticity, volume, increased moisture absorption, better moisture transport, better air retention, reduced gloss, or a more pleasant feel or better wearing comfort.

[0003] From CH 618 221 A, a texturing device is known with a texturing nozzle equipped with a yarn feed channel and a subsequent vortex chamber. At least one channel, directed radially towards an axis of the yarn feed channel and serving to supply compressed air, opens into the vortex chamber. A coaxially conically shaped yarn exit channel connects to the vortex chamber. A guide element engages in the yarn exit channel. An annular gap forms between the guide element and a wall of the yarn exit channel. After exiting the texturing nozzle, the textured yarn passing through the annular gap is drawn off radially over an edge of the yarn exit channel with respect to the axis of the yarn feed channel. EP 0 088 254 A2 proposes an improvement of this texturing nozzle, essentially through a novel design of the yarn guide channel and / or the exit opening of the yarn guide channel.However, the use of the annular gap-forming guide element is retained. The radial yarn take-off after passing through the annular gap is also maintained. A further development of the texturing nozzle, in particular the shape of the yarn guide channel, is disclosed in DE 196 05 675 A1. This aims to increase the intensity of the texturing by achieving several times the speed of sound in the yarn guide channel. An increase in production speeds should also be achieved. This proposed design of the texturing nozzle also features a guide element or impact element in the trumpet-shaped outlet opening of the yarn guide channel. Furthermore, EP 2 628 830 A1 discloses a texturing device with a plurality of known texturing nozzles in combination with a variation of the impact element.Unlike DE 196 05 675 A1, the impact body does not engage in the exit opening of the yarn guide channel, but is located downstream of it.

[0004] A disadvantage of the texturing nozzle designs known from the aforementioned prior art is the deflection of the textured yarn around the edge of the exit opening, resulting in a radial pull-off of the textured yarn. This right-angled deflection of the yarn along the edge of the exit opening, which acts as a yarn guide, not only leads to increased wear of the texturing nozzle but can also cause individual wraps to splay out, particularly due to a central impact of a convex or concave surface of the guide or impact body followed by a radial pull-off. Another disadvantage of the known impact body design is that the airflow from the texturing nozzle is obstructed, thus reducing the tensile force on the yarn. Furthermore, this obstruction results in a strong reverse flow velocity out of the texturing nozzle, reducing the amount of water added to improve the process.

[0005] JP 2001 140 137 A discloses a further texturing device with a texturing nozzle and an impactor. The texturing nozzle has a cylindrical yarn guide channel with a compressed air inlet into the yarn guide channel. No special shape for an outlet opening of the yarn guide channel is provided on one exit side of the texturing nozzle. Accordingly, the impactor is spaced apart from the outlet of the yarn guide channel from the texturing nozzle. The space between the texturing nozzle and the impactor must be used instead of a correspondingly shaped outlet opening to achieve loop formation of the chamois to be textured. The textured yarn is then guided through the impactor, since radial extraction of the yarn is not possible due to the large distance between the texturing nozzle and the impactor and the insufficient texturing before reaching the impactor.One surface of the impact body, facing away from the texturing nozzle, is convex, which corresponds to the design of impact bodies according to the prior art and, according to known disclosures, enables a high production speed. Disadvantages of the disclosed design include the difficulty in controlling the uniformity of the texturing and the formation of splays due to the generation of loops in the open space between the texturing nozzle and the impact body.

[0006] It has now been shown that, for yarns textured with the devices described above, their stability—that is, the preservation of the yarn properties both during and after the processing—is an important criterion for the applicability of such textured yarns. Furthermore, the degree and uniformity of the mixing of the individual filaments of the textured yarn is also essential for achieving a uniform structure and appearance in goods manufactured from the yarn.

[0007] The object of the present invention is therefore to provide a device for texturing yarn which enables uniform swirling and loop formation at a high production speed while avoiding damage or spreading of individual loops.

[0008] The problem is solved by a device with the features of the independent claim. A device for texturing yarn is proposed, comprising a texturing nozzle and an impact element. The texturing nozzle has a nozzle inlet and a nozzle outlet connected to the nozzle inlet by a nozzle bore, and a compressed air connection connected to the nozzle bore. The impact element is located at a distance opposite the nozzle outlet, and the texturing nozzle and the impact element are arranged on a common texturing axis. The impact element has a concavely shaped impact surface directed towards the nozzle outlet of the texturing nozzle and an impact element outlet opposite the impact surface, the impact surface being connected to the impact element outlet by an impact element bore.The texturing nozzle and impact element are arranged sequentially along the texturing axis, ensuring that the yarn remains stationary between the nozzle and impact element. The yarn, consisting of numerous filaments, is fed into the inlet of the texturing nozzle and passes through the nozzle bore to the outlet. Compressed air is introduced into the nozzle bore, causing the individual filaments to swirl. At the nozzle outlet, the air introduced through the compressed air connection reaches supersonic speeds, generating the aerodynamic effects necessary for texturing. Various designs for the texturing nozzle are known in the prior art; however, the impact element positioned downstream of the texturing nozzle is essential to the device.The yarn exiting the texturing nozzle, along with the compressed air introduced into the nozzle, strikes the concavely shaped impact surface and is thereby guided into the impact element bore. Due to the placement of the impact element bore within the impact surface, the yarn is not subjected to a significant change in direction after impact; it exits the impact surface through the impact element bore in the direction of the texturing axis. The impact element bore also reduces back pressure at the nozzle outlet of the texturing nozzle, thus minimizing backflow. This guidance of the yarn and air has been shown to result in a more uniform texturing and improved integration of formed loops into the yarn body.

[0009] Advantageously, the nozzle orifice of the texturing nozzle and the impact element orifice are arranged along the texturing axis. One axis of the impact element orifice runs precisely along the texturing axis, thus completely preventing any change in the yarn's direction. This has been shown to achieve a texture in the yarn that is at least 10% stronger.

[0010] Advantageously, the impact surface incorporates numerous openings, located between the impact surface and the outlet of the impact element. These openings prevent some of the compressed air from entering the impact element bore, diverting it away from the yarn body. Furthermore, the openings reduce the back pressure at the nozzle outlet of the texturing nozzle, thereby improving the tensile force generated by the airflow. The openings can be configured in various shapes, such as circular, rectangular, or slotted.It has been shown that by partially diverting the compressed air, shaping the impact surface concavely, and subsequently guiding the yarn through the impact element bore, the production speed can be increased by more than 15% without any loss in texture or quality of the textured game. Production speeds of more than 1000 m / min were achieved with an increase in texture intensity compared to conventional methods. If the production speed is predetermined by upstream or downstream process elements, or if the texture intensity is predetermined by a desired product, the device according to the invention can achieve lower energy consumption by reducing the pressure of the supplied compressed air or by reducing the flow rate, for example, by reducing the size of the openings of the compressed air connection in the nozzle bore of the texturing nozzle.

[0011] Preferably, the impact surface openings are in the form of through-holes leading from the impact surface into a groove circumferentially surrounding the impact element. In this design, it is considerably easier to route the impact surface openings from the impact surface through the impact element into the surrounding environment. The simplicity of through-holes in the manufacture of the impact element offers design advantages. The through-holes are particularly preferably arranged perpendicular to the impact surface. This perpendicular arrangement of the through-holes, or impact surface openings, ensures optimal airflow from the texturing nozzle onto the impact surface of the impact element. The number and arrangement of the through-holes in the impact surface depend on the properties of the yarn being processed.It has been shown that a symmetrical arrangement of six through-holes in the impact surface, each located midway between the impact element bore and an outer edge of the impact surface, can be used for most textured materials. Through-holes with a diameter 10% to 50% smaller than the diameter of the impact element bore were used. It has been found that when texturing a fine textured material, a large number of impact surface openings with a small cross-section are advantageous, while when texturing a coarse textured material, a smaller number of impact surface openings with a larger cross-section are more beneficial. Textured materials with a yarn count range of 10 decitex to 4,000 decitex are used, preferably made of polyester or polyamide (PA6.6).

[0012] Furthermore, it is advantageous if the distance between the impact element and the texturing nozzle is less than 1.5 mm. Some of the entrained air escapes through an annular gap between the texturing nozzle and the impact element. If the distance between the nozzle outlet of the texturing nozzle and the impact element is too great, the texturing effect achieved through supersonic speed, and necessary for texturing, is lost before the air reaches the impact surface.

[0013] Preferably, the nozzle outlet has a funnel- or trumpet-shaped cross-section that widens in a direction away from the nozzle bore, with a nozzle outlet diameter of [missing information]. The concavely shaped impact surface has an impact surface diameter at an end facing the texturing nozzle that is equal to or smaller than the nozzle outlet diameter of the texturing nozzle located at a distance from the impact element. The trumpet-shaped widening cross-section of the nozzle outlet is known from the prior art and has led to an increase in the intensity or strength of the texturing compared to cylindrical or continuously conical nozzle outlet shapes.If the baffle diameter is larger than the nozzle outlet diameter, an undesirable deflection of the air layer adhering to the outer wall of the trumpet-shaped nozzle outlet occurs, resulting in air vortices in the baffle area that negatively impact the texturing. Advantageously, the concave baffle has a depth of 0.1 to 0.25 times its diameter. If the depth is too large relative to the diameter, the baffle becomes almost hemispherical. The flow conditions in the baffle area would be so severely affected that a positive flow of compressed air into the baffle bore, which enhances texturing, could no longer be maintained. It has been shown that a baffle bore diameter of 0.2 to 0.4 times the diameter of the baffle is advantageous.Good results were achieved when using a texturing nozzle with a nozzle bore diameter of 2.0 mm with an impact element with an impact surface diameter of 8 mm, an impact surface depth of 1.3 mm and an impact element bore diameter of 2.5 mm for texturing yarn with T500 decitex made of polyamide (PA6.6).

[0014] Preferably, the impact element bore has a larger cross-section at the impact element exit than in the impact surface. This can be achieved, for example, by a conical impact element bore that opens towards the impact element exit or by a stepped impact element bore. The increased cross-section towards the impact element exit regulates pressure loss within the impact element bore and also prevents high friction of the chamfer against the wall of the impact element bore, thus avoiding damage to the yarn. Particularly preferably, the cross-section of the impact element bore at the impact element exit is 1.5 to 2.5 times larger than the cross-section of the impact element bore in the impact surface. In a further embodiment, a ceramic eyelet is used at the impact element exit, which, due to the surface properties of the ceramic, also reduces friction between the chamfer and the wall of the impact element bore.

[0015] It is further proposed that the texturing nozzle has a holder with a mounting axis for attaching the impact element. Because the texturing nozzle is equipped with a holder for the impact element, the impact element can be directly connected to the texturing nozzle via the holder. This ensures optimal alignment of the impact element along the texturing axis. Preferably, the holder is detachably connected to the texturing nozzle, allowing for replacement of the texturing nozzle if necessary. Replacement of the texturing nozzle may be necessary due to wear or when changing products. The impact element is attached to the holder, or vice versa, for example, with screws or a clip fastener, which allows for tool-free replacement of the texturing nozzle or the impact element.

[0016] Advantageously, the impact element is equipped with a mounting arm that is pivotably attached to the holder around the holder's axis. With this design, the mounting arm and the impact element can be pivoted away from the texturing axis. This allows the device to be used as a simple texturing nozzle without a downstream impact element. Depending on the starting material and the final product, the impact element may or may not be used; no separate assembly or disassembly of the impact element is required. For necessary cleaning, the impact element can be pivoted out of the yarn path and then returned to its operating position. Similarly, the impact element can be pivoted away from the texturing axis for threading.

[0017] Preferably, a locking device or stop is provided on the holder or mounting arm, so that when the impact element pivots around the holder axis, it reaches the texturing axis. For example, when the impact element pivots into the texturing axis, a projection on the mounting arm engages in a corresponding recess in the holder as soon as the operating position is reached, i.e., when the impact element is positioned on the texturing axis. This engagement ensures that the impact element can be precisely pivoted into the operating position and that the locking device provides a secure position for the impact element. Releasing the impact element from the texturing axis requires a corresponding force, thus preventing any operational misalignment of the impact element.Other designs for locking devices are known from the prior art, such as the use of a ball which is pressed into a recess when the operating position is reached, or an asymmetrical pivoting movement in which the mounting arm falls into the operating position after overcoming the asymmetry through the pivoting movement. Alternatively, a stop is also possible. The impact element is pivoted until it reaches the stop. To prevent subsequent operational adjustment of the impact element's position, the impact element can, for example, be held against the stop by a spring or fixed to the stop by a magnet.

[0018] As an alternative to attaching the impact element to a holder on the nozzle, the impact element is held directly on the nozzle by a fastener. The distance between the nozzle and the impact element is adjustable by means of an intermediate piece or a projection on the impact element or on the nozzle. The nozzle and the impact element each have a corresponding flange. The two flanges are connected to each other by fasteners such as screws or quick-release fasteners. To adjust the distance between the nozzle and the impact element, corresponding projections are provided on one of the two flanges. These projections do not extend around the entire flange in order to avoid obstructing the annular gap between the nozzle and the impact surface, which is a desired result of the distance adjustment.The use of an intermediate piece has the advantage that by replacing the intermediate piece the distance between the texturing nozzle and the impact element can be changed without having to replace the texturing nozzle or the impact element with a molded flange.

[0019] As another alternative connection between the texturing nozzle and the impact element, a housing can be provided into which the texturing nozzle is inserted from one side and the impact element from the opposite side. The texturing nozzle and the impact element are, for example, provided with an external thread and are screwed into the housing. The distance between the texturing nozzle and the impact element can be adjusted by means of a spacer ring, which is integrally formed on the housing and inserted between the texturing nozzle and the impact element. Further advantages of the invention are described in the following exemplary embodiment. The following are shown:

[0020] Figure 1 shows a schematic representation of a first embodiment of a device according to the invention;

[0021] Figure 2 shows a schematic representation of a second embodiment of a device according to the invention;

[0022] Figure 3a shows a schematic representation of another embodiment of an impact element;

[0023] Figure 3b is a schematic sectional view at point XX according to Figure 3a;

[0024] Figure 4a shows a schematic representation of another embodiment of impact surface openings of an impact element;

[0025] Figure 4b shows a schematic representation of another embodiment of impact surface openings of an impact element;

[0026] Figure 5a shows a schematic representation of another embodiment of an impact element;

[0027] Figure 5b is a schematic sectional view at location YY according to Figure 5a;

[0028] Figure 6 shows a schematic representation of another embodiment of an impact element;

[0029] Figure 7a shows a schematic representation of a third embodiment of a device according to the invention;

[0030] Figure 7b is a schematic sectional view at point ZZ according to Figure 7a and

[0031] Figure 8 shows a schematic representation of a fourth embodiment of a device according to the invention.

[0032] Figure 1 shows a schematic representation of a first embodiment of a device with a texturing nozzle 2 and an impact element 9, which are arranged in a common texturing axis 1. The texturing nozzle 2 has a nozzle inlet 3, a nozzle outlet 4, and a nozzle bore 5 connecting the nozzle inlet 3 to the nozzle outlet 4. A compressed air connection 7 is also provided, which opens into the nozzle bore 5. Opposite the nozzle outlet 4 of the texturing nozzle 2, at a distance 8, is the impact element 9, which has a concave impact surface 10 on one side facing the texturing nozzle 2. The impact surface 10 is connected via an impact element bore 13 to an impact element outlet 18 facing away from the texturing nozzle 2. The impact element bore 13 has a bore axis 15 which deviates from the text sub-axis 1 in its course from the impact surface 10 to the impact element exit 18.The impact surface 10 is arranged asymmetrically to the texturing axis 1 in its concave shape according to the course of the bore axis 15.

[0033] Figure 2 shows a schematic representation of a second embodiment of a device with a texturing nozzle 2 and an impact element 9, which are arranged in a common texturing axis 1. The texturing nozzle 2 has a nozzle inlet 3, a nozzle outlet 4 with a nozzle outlet diameter 6, and a nozzle bore 5 connecting the nozzle inlet 3 to the nozzle outlet 4. A compressed air connection 7 is also provided, which opens into the nozzle bore 5. Opposite the nozzle outlet 4 of the texturing nozzle 2, at a distance 8, is the impact element 9, which has a concave impact surface 10 on one side facing the texturing nozzle 2. The impact surface 10 is connected via an impact element bore 13 with a bore diameter 14 to an impact element outlet 18 facing away from the texturing nozzle 2. The impact element bore 13 has a bore axis 15.In contrast to the embodiment shown in Figure 1, the bore axis 15 of the impact element bore 13 is aligned with the texturing axis 1, and the impact surface 10 is designed with a concave shape that is symmetrical to the texturing axis 1. The impact surface 10 has an impact surface diameter 11 and an impact surface depth 12.

[0034] Figure 3a shows a schematic representation of another embodiment of an impact element 9, and Figure 3b shows a schematic sectional view at position XX according to Figure 3a. The impact element 9 has an impact surface 10 with an impact surface diameter 11 and an impact surface depth 12. The impact surface 10 is connected to an impact element outlet 18 via an impact element bore 13. The impact element bore 13 runs in a bore axis 15 arranged perpendicular to the impact surface 10 and has a bore diameter 14. The impact element outlet 18 is located on a side of the impact element 9 opposite the impact surface 10. Several impact surface openings 16 are arranged in the impact surface 10; three circular impact surface openings 16 are shown here by way of example. The impact surface openings 16 lead from the impact surface 10 through the impact element 9 to the outside into the surroundings of the impact element 9.

[0035] Figures 4a and 4b show schematic representations of further embodiments of the impact surface openings 16 of the impact element 9. Shown are the impact element bore 13, centrally located in the impact surface 10, and a plurality of impact surface openings 16, which extend from the impact surface 10 through the impact element 9 to the outside into the surrounding area of ​​the impact element 9. Figure 4a shows four symmetrically arranged impact surface openings 16, each with a kidney-shaped cross-section. Figure 4b shows eight impact surface openings 16 with a hexagonal cross-section.

[0036] Figure 5a shows a schematic representation of another embodiment of an impact element 9, and Figure 5b shows a schematic sectional view at position YY according to Figure 5a. The impact element 9 has an impact surface 10 with an impact surface diameter 11 and an impact surface depth 12. The impact surface 10 is connected to an impact element outlet 18 via an impact element bore 13. The impact element bore 13 runs in a bore axis 15 arranged perpendicular to the impact surface 10 and has a bore diameter 14. The impact element outlet 18 is located on a side of the impact element 9 opposite the impact surface 10. Several impact surface openings in the form of through holes 17 are arranged in the impact surface 10; twelve through holes 17 arranged symmetrically around the impact element bore 13 in the impact surface 10 are shown by way of example.The through holes 17 lead from the impact surface 10 through the impact element 9 into a groove 19 circumferentially around the impact element 9. The circumferential groove 19 makes it possible to arrange the through holes 17 perpendicular to the impact surface 10.

[0037] Figure 6 shows a schematic representation of another embodiment of an impact element 9. The impact element 9 has an impact surface 10 with an impact surface diameter 11 and an impact surface depth 12. The impact surface 10 is connected to an impact element outlet 18 via an impact element bore 13 arranged centrally in the impact surface 10. The impact element bore 13 runs in a bore axis 15 arranged perpendicular to the impact surface 10 and is designed as a stepped bore. The impact element bore 13 is shown, which, in its course from the impact surface 10 to the impact element outlet 18, has a first diameter at the beginning and a second diameter at the end, the second diameter being larger than the first diameter. The impact element outlet 18 is located on a side of the impact element 9 opposite the impact surface 10. Several through-holes 17 are arranged in the impact surface 10.The through holes 17 lead from the impact surface 10 through the impact element 9 into a groove 19 that surrounds the impact element 9. The through holes 17 are arranged perpendicular to the impact surface 10.

[0038] Figure 7a shows a schematic representation of a third embodiment of a device according to the invention, and Figure 7b shows a schematic sectional view at position ZZ according to Figure 7a. A texturing nozzle 2 and an impact element 9 are arranged one behind the other in a texturing axis 1. The impact element 9 has an impact surface 10 opposite the texturing nozzle 2, with an impact element bore 13 arranged centrally in the impact surface 10 and impact element openings 16 arranged symmetrically around the impact element bore 13. A holder 20 with a holder axis 21 is attached to the texturing nozzle 2. The holder axis 21 is shown in Figure 7a by way of example parallel to the texturing axis 1. The impact element 9 is held on a mounting arm 22, which is rotatably attached to the holder axis 21. A stop 23 is provided on the holder 21.A pivoting movement 24 pivots the impact element 9 out of the texturing axis 1 (the pivoted position is shown with dashed lines in Figure 7b). In the pivoted position, the position of the impact element 9 is determined by the stop 23. The impact element 9, with its mounting arm 22, can only be pivoted as far as the stop 23. In the illustrated embodiment, the stop 23 engages in a recess in the mounting arm 22, thereby locking the stop 23 into the mounting arm 22 and thus securing the pivoted position of the impact element 9. Figure 8 shows a schematic representation of a fourth embodiment of a device according to the invention. A texturing nozzle 2 and an impact element 9 are arranged one behind the other in a texturing axis 1.The texturing nozzle 2 has a nozzle inlet 3, a nozzle outlet 4 with a nozzle outlet diameter 6, and a nozzle bore 5 connecting the nozzle inlet 3 to the nozzle outlet 4. A compressed air connection 7 is also provided, which opens into the nozzle bore 5. Opposite the nozzle outlet 4 of the texturing nozzle 2, at a distance 8, is the impact element 9, which has a concave impact surface 10 on one side facing the texturing nozzle 2. The impact surface 10 is connected via an impact element bore 13 with a bore diameter 14 to an impact element outlet 18 facing away from the texturing nozzle 2. Several through-holes 17 are arranged in the impact surface 10, which lead from the impact surface 10 through the impact element 9 into a groove 19 circumferentially around the impact element 9. The texturing nozzle 2 and the impact element 9 are each provided with a flange 25 and 26 at their respective opposite ends.The flange 25 of the texturing nozzle 2 and the flange 26 of the impact element 9 are connected by fasteners 27. The fasteners 27 are shown in Figure 8 as an example of a screw connection. To adjust a distance 8 between the texturing nozzle 2 and the impact element 9, a plurality of projections 29 on the flange 25 of the texturing nozzle 2 are shown above the texturing axis 1. Alternatively, intermediate pieces 28 are shown below the texturing axis 1 between the flange 25 of the texturing nozzle 2 and the flange 26 of the impact element 9.

[0039] The present invention is not limited to the embodiments illustrated and described. Modifications within the scope of the claims are possible, as is a combination of the features, even if these are illustrated and described in different embodiments. List of reference numerals

[0040] 1 Texturing axis

[0041] 2 Texturing nozzle

[0042] 3 Nozzle inlet

[0043] 4 Nozzle outlet

[0044] 5 nozzle bore

[0045] 6 nozzle outlet diameters

[0046] 7 Compressed air connection

[0047] 8 distance

[0048] 9 Impact element

[0049] 10 Impact area

[0050] 11 Impact surface diameter

[0051] 12 Impact surface depth

[0052] 13 Impact element bore

[0053] 14 bore diameters

[0054] 15 Bore axis

[0055] 16 Impact surface opening

[0056] 17 Through-hole

[0057] 18 Impact element exit

[0058] 19 Nut

[0059] 20 holders

[0060] 21 Holder axle

[0061] 22 Mounting arm

[0062] 23 attacks

[0063] 24 swivel movement

[0064] 25 Flange Texturing Nozzle

[0065] 26 Flange impact element

[0066] 27 Fastening element

[0067] 28 Intermediate piece

[0068] 29 lead

Claims

Patent claims 1. Device for texturing yarn, wherein the device comprises a texturing nozzle (2) and an impact element (9), and wherein the texturing nozzle (2) has a nozzle inlet (3) and a nozzle outlet (4) connected to the nozzle inlet (3) by a nozzle bore (5) and a compressed air connection (7) connected to the nozzle bore (5), and wherein the impact element (9) is located opposite the nozzle outlet (4) at a distance (8) and the texturing nozzle (2) and the impact element (9) are arranged in a common texturing axis (1), characterized in that the impact element (9) has a concavely shaped impact surface (10) directed towards the nozzle outlet (4) of the texturing nozzle (2) and an impact element outlet (18) opposite the impact surface (10), wherein the impact surface (10) is connected to the impact element outlet (18) by an impact element bore (13).

2. Device according to claim 1 , characterized in that the nozzle bore (5) of the texturing nozzle (2) and the impact element bore (13) are arranged in the texturing axis (1 ).

3. Device according to claim 1 or 2, characterized in that a plurality of impact surface openings (16) are provided in the impact surface (10), which are led out of the impact element (9) between the impact surface (10) and the impact element exit (18).

4. Device according to claim 3, characterized in that the impact surface openings (16) in the form of through holes (17) are guided from the impact surface (10) into a groove (19) circumferentially around the impact element (9).

5. Device according to claim 4, characterized in that the through holes (17) are arranged perpendicular to the impact surface (10).

6. Device according to at least one of the preceding claims, characterized in that the distance (8) between the impact element (9) and the text nozzle (2) is less than 1.5 mm.

7. Device according to at least one of the preceding claims, characterized in that the nozzle outlet (4) has a funnel- or trumpet-shaped cross-section that widens in a direction away from the nozzle bore (5) and has a nozzle outlet diameter (6) and the concavely shaped impact surface (10) has an impact surface diameter (11) at an end directed towards the texturing nozzle (2) which is equal to or smaller than the nozzle outlet diameter (6) of the texturing nozzle (2) located at a distance (8) from the impact element (9).

8. Device according to at least one of the preceding claims, characterized in that the concavely shaped impact surface (10) has an impact surface depth (12) of 0.1 to 0.25 of the impact surface diameter (11 ).

9. Device according to claim 8, characterized in that the impact element bore (13) has a bore diameter (14) of 0.2 to 0.4 of the impact surface diameter (11 ).

10. Device according to at least one of the preceding claims, characterized in that the impact element bore (13) in the impact element outlet (18) has a larger cross-section than in the impact surface (10).

11. Device according to claim 10, characterized in that the cross-section of the impact element bore (13) in the impact element outlet (18) is 1.5 times to 2.5 times the cross-section of the impact element bore (13) in the impact surface (10).

12. Device according to at least one of the preceding claims, characterized in that the text nozzle (2) has a holder (20) with a holder axis (21) for attaching the impact element (9).

13. Device according to claim 12, characterized in that the impact element (9) is provided with a fastening arm (22) which is attached to the holder (20) around the The holder axle (21) is pivotably mounted.

14. Device according to claim 12 or 13, characterized in that a locking device or a stop (23) is provided on the holder (20) or on the mounting arm (22), such that when the impact element (9) pivots (24) about the holder axis (21), the impact element (9) reaches the lower axis (2).

15. Device according to at least one of claims 1 to 11, characterized in that the impact element (9) is held on the text nozzle (2) by a fastening element (27), wherein the distance (8) between the text nozzle (2) and the impact element (9) is adjustable by an intermediate piece (28) or a projection (29) on the impact element (9) or on the text nozzle (2).

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