EP1795633A2 - Open-end spinning device with an exchangeable twist congesting element - Google Patents

Abstract

An open end spinning assembly has a rotor housing with a cap closure. The cap incorporates an interchangeable duct plate adapter through which pass both the fiber feed and the discharging yarn. The yarn discharges through a jet and a twist accumulation element with an essentially central yarn outlet. The twist accumulation element is inserted directly within the duct plate adapter. In the direction of discharge (B), the twist accumulation element (117) is the last yarn guide component joined to the lid closure (2). Further claimed are a duct plate adapter, a twist accumulation element, a yarn discharge jet and a commensurate aggregate unit assembled from these parts.

Description

The invention relates to an open-end spinning device with a lid closing a rotor housing, wherein a Faserzuspeisung and a Garnabzug done by a lid mounted in the exchangeable Kanalplattenadapter, and the Garnabzug via a Garnabzugsdüse and at least one downstream and easily replaceable twist accumulation element with a substantially centric Garnabzugsöffnung he follows.

The invention further relates to a channel plate adapter, a twist dam element and a Garnabzugsdüse and a separate assembly of these components for such an open-end spinning device.

It has long been known to use spinning rotors with different diameters in open-end spinning devices. In order to be able to adapt the fiber feed to the different diameters, channel plate adapter are known, for example from the DE 199 34 893 A1 which are easily inserted into the lid of the rotor housing and which contain an end portion of a fiber feed channel. The outer contour of the channel plate adapter and the mouth of the fiber feed channel are each adapted to the associated spinning rotor. In addition, the Garnabzug done by a mounted in the channel plate adapter Garnabzugsdüse.

From the DE 199 34 893 A1 , of which the invention in the preamble emanates, also a Garnabzugsdüse downstream swirl damper is known. The swirl-blocking element consists essentially of a short thread withdrawal tube with a substantially centric Garnabzugsöffnung, which widens in a funnel shape toward the end. In the area in which the yarn to be deflected, the funnel-shaped Garnabzugsöffnung the twist accumulation element touched, an insert is provided. The spin damper element is received by a receptacle in the cover of the rotor housing and fixed by a clip device, whereby it is easily replaceable. As a result, depending on the requirement, twist-blocking elements with different swirl-jamming effect can be used.

The known design has the disadvantage that the distance between Garnabzugsdüse and twist accumulation element can not be shortened. It has been found that the distance between the deflection of the yarn at the draw-off nozzle and the subsequent deflection at the twist-blocking element influences the quality of the spun yarn, and that by reducing this distance quality improvements in the yarn can be achieved. However, due to the configuration of the known twist-blocking element as a thread withdrawal tube and its reception in the cover of the rotor housing, it is not possible to achieve a sufficient shortening of this distance.

Furthermore, the known design has the disadvantage that the channel plate adapter with Garnabzugsdüse and the twist accumulation element can not be replaced together. In practice, it often happens that in a batch change a spinning rotor with a different diameter and an associated new channel plate adapter should be used in the open-end spinning device. In this case, although the newly inserted channel plate adapter can be equipped in advance with the right Garnabzugsdüse and then use together with it in the open-end spinning device, but the twist baffle must always be replaced separately. This leads in particular to modern open-end spinning machines, which can have over 250 spinning positions, to relatively high downtime during a conversion.

In addition, in the known embodiment, a Garnabzugsdüse described in the means for securing the Garnabzugsdüse in a channel plate adapter are provided, which are actuated by insertion of a twist dam element. In a recess in the channel plate adapter, an elastic element is arranged, which surrounds the Garnabzugsdüse and which deforms when inserting the swirl damper element in a cover of the rotor housing this elastic element and thereby fix the Garnabzugsdüse. This embodiment has the disadvantage that the Garnabzugsdüse can move unintentionally when inserting the twist accumulation element and then not sitting in the correct position during the subsequent spinning process.

From the non-generic DE 196 24 537 A1 For example, a channel plate adapter is known for use with particularly small diameter spinning rotors having two permanently attached inserts as a yarn draw nozzle and a twist blocking element. Although the changeover time during a lot change is small, this design has the disadvantage that the yarn take-off nozzle and the twist blocking element are not easily exchangeable on the channel plate adapter. Each time a completely new channel plate adapter is required for each different surface structure Garnabzugsdüse and / or twist damper element, which represents an unreasonable high cost in the variety of surface structures known today, for example, with ridges, depressions or notches, since the entire channel plate adapter is a complex to produce and thus represents an expensive component.

The open-end spinning device of DE 196 24 537 A1 also has the disadvantage that the Garnabzugsöffnung is already curved in the twist accumulation element, the subsequent Garnabzug but not in this direction continues. As a result, the yarn must be deflected once again over an edge when entering a downstream of the twist accumulation thread withdrawal tube. The twist accumulation element is arranged downstream of the yarn withdrawal tube yet another guide element, which may adversely affect the yarn properties. In addition, threading a yarn end at a Piecing process made difficult by the multiple changes in direction in the Garnabzugsöffnung.

From the also not generic German Offenlegungsschrift DE 21 31 861 there is known an open-end spinning device without a replaceable channel plate adapter. In this open-end spinning device, a twist-blocking element is inserted directly into the cover of the rotor housing, which has a blind-hole-like yarn withdrawal opening, in the end region of which the thread to be withdrawn is deflected by 90 °. This embodiment has the disadvantage that threading a yarn end in a piecing after a yarn breakage can only be done under extreme expense and can not be performed virtually automated.

Furthermore, from the German Offenlegungsschrift DE 21 31 861 a Garnabzugsdüse known which has as a means for fastening a thread. The Garnabzugsdüse is connected via the thread with a twist dam element, which is inserted into a rotor housing closing a lid of the open-end spinning device. The swirl-blocking element is fastened with a separate means for fastening, which is designed as a threaded pin acting radially on the swirl-blocking element. When tightening this set screw can be pushed away radially in not quite accurate guidance of the swirl damper, whereby the attached to the swirl damper Garnabzugsdüse is moved in position to the spinning rotor. A yarn take-off nozzle eccentrically arranged with respect to the axis of the spinning rotor may cause irregularities in the spun yarn.

The invention is based on the object to improve the known design and to avoid the disadvantages mentioned.

The object is achieved in the open-end spinning device, characterized in that the twist accumulation element can be used directly in the channel plate adapter.

In the channel plate adapter, the twist blocking element, the Garnabzugsdüse and the assembly of these components, the object is achieved by the features of the independent claims.

Due to the easily replaceable swirl-accumulation element, which is received directly by the channel plate adapter, it becomes possible on the one hand to realize very small distances between the first yarn deflection on the yarn draw-off nozzle and the second yarn deflection on the twist-blocking element. As a result, minimum distances in the range of less than 10 mm to about 20 mm are possible, which allow a very high yarn quality. Furthermore, as well as the well-known large distances in areas of 40 to 80 mm are also possible by a correspondingly long design of the twist dam element. Large distances may be required if increased spin stability is required.

On the other hand, it is possible to provide a separately preassembled assembly for the fiber feed and the yarn take-off, in which a channel plate adapter outside the open-end spinning device with a corresponding Garnabzugsdüse and a corresponding twist accumulation element is finished assembled. Preferably, the channel plate adapter has a part of a fiber feed channel. In a batch change on the spinning machine, the existing assembly of the channel plate adapter is exchanged for the already pre-assembled new assembly of another channel plate adapter, thereby minimizing the downtime of the machine during conversion.

As a result, the open-end spinning device has an extremely high level of flexibility, which is particularly important today, especially with regard to ever widening fields of application.

In an embodiment of the invention is advantageous if the assembly has means for securing the spin damper and Garnabzugsdüse.

These means for fastening are particularly advantageous a bayonet closure, but can also be a thread, which can then preferably be designed as a thread with a large pitch and under certain circumstances also more continuous. Furthermore, it may be advantageous for the receptacle of the swirl-blocking element to be substantially cylindrical.

In a particularly advantageous embodiment, it is provided that a means for fastening, for example, a bayonet lock, at the same time fixes the twist baffle element and the Garnabzugsdüse in the channel plate adapter. In this case, it may additionally be provided that an exchangeable vortex insert is fixed between the Garnabzugsdüse and the twist dam. As a result, a particularly simple interchangeability of Garnabzugsdüse and swirl insert and optionally vertebral insert is guaranteed, since only one attachment must be solved. It is also prevented that the Garnabzugsdüse, which is located inside the rotor housing during operation and is not visible from the outside, unnoticed shifts in position or even dissolves, as inevitably in such a case, the spin damper would also solve. Since the swirl damper is located on the outside of the rotor housing, a no longer properly attached swirl damper by the operator immediately recognizable. It is thus avoided that the open-end spinning device unnoticed generates yarn of reduced quality.

It can be advantageous that the receiving of the swirl-blocking element is assigned an element for preventing rotation, for example a projection, cam or pin, which interacts with a corresponding recess, groove or bore on the channel plate adapter. Preferably, the element is arranged to prevent rotation in the region of the substantially cylindrical receptacle. The twist-blocking element or at least its base body can be produced very cheaply as an injection-molded part.

If the means for attaching the Garnabzugsdüse are simultaneously means for fixing the also insertable into the channel plate adapter swirl damper, practically Garnabzugsdüse and swirl-blocking element can be directly connected to each other and thus are both in a defined position. It can be provided that the means for attaching no longer act directly on the channel plate adapter, but rather that the Garnabzugsdüse and the twist accumulation element are clamped together against the channel plate adapter. It may be advantageous in this case that the means for fixing is positively, as this is ensured in any case a permanently effective operation.

It can also be advantageous for the twist blocking element or the yarn withdrawal nozzle to be displaceable in the axial direction of the yarn removal opening, and for a spring element to be provided which loads the twist blocking element or the yarn withdrawal nozzle in the axial direction of the yarn removal opening. In particular, in combination with means for fastening, which simultaneously fix the twist accumulation element and the Garnabzugsdüse, an advantageous variant can be realized in which the position of the end face of the Garnabzugsdüse is changed by washers, while still the distance between the first Garnumlenkung on the Garnabzugsdüse and the second yarn deflection remains constant at the swirl damper. In an embodiment, it can be provided that the means for fastening can be unlocked by a displacement of the twist blocking element in the axial direction of the yarn withdrawal opening.

It is advantageous if the twist blocking element has a deflection radius of between 3 and 50 mm, preferably between 6 and 28 mm, at the funnel-shaped widening of its yarn withdrawal opening, wherein the different deflection radii are preferably positioned such that the free cross section of the yarn withdrawal opening does not change. Advantageously, the deflection radius is attached to an insert inserted into a base body of the twist blocking element. The insert can be segmented and similar to the DE 199 34 893 A1 known, only cover the area in which the yarn is running. However, the insert can also be rotationally symmetrical and cover the entire funnel-shaped region of the twist blocking element. Such inserts are easy to produce and can be attached, for example, by gluing in a simple manner in the body. In addition, it may be possible to use inserts on the swirl baffle which were originally intended for yarn take-off nozzles. This can reduce the variety of parts in the inserts.

The region of the deflection radius of the twist blocking element deflecting the yarn from the direction of the rotor axis preferably has a wear-resistant surface which can be smooth or with surface structures such as elevations, depressions, ribs, notches or spirals in a manner known per se. The different surface structures can serve to change the twist-blocking effect and to adapt it to the respective requirements for the yarn to be spun, so that a good spinning stability can be achieved with the desired yarn quality.

If the means for attaching the swirl damper or the Garnabzugsdüse include a bayonet closure, then the term "bayonet lock" is understood to be attached to the Garnabzugsdüse at least a portion of a bayonet fitting, which can cooperate with a second mounted on the spin dam member part. This view is analogous to the conditions in a designed as a threaded means for fastening, since it is of course also attached only either an internal thread or an external thread on the spin damper or Garnabzugsdüse.

A channel plate adapter, which is particularly well suited for a separately pre-assembled fiber feed and take-off assembly, includes a cylindrical guide surface for a yarn take-off die, which is on the same side of the channel plate adapter as the exit port of a fiber channel is arranged. In addition, the channel plate adapter includes a substantially cylindrical receiver for a swirl damper member disposed on the side of the channel plate adapter opposite the cylindrical guide surface for a yarn take-off nozzle. Preferably, the diameter of the receptacle for the swirl-blocking element is greater than the diameter of the guide surface for the Garnabzugsdüse. As a result, the channel plate adapter can also be used in conjunction with very small spinning rotors.

A yarn take-off die, which is particularly well suited for a separately pre-assembled fiber feed and take-down assembly, includes a cylindrical guide surface for guiding in insertion into the channel plate adapter. The Garnabzugsdüse can be in one piece, or for example consist of a nozzle holder with a nozzle insert. An annular abutment surface is provided on the Garnabzugsdüse, which is arranged parallel to the end face of the Garnabzugsdüse and with which the Garnabzugsdüse rests against the channel plate adapter. It is advantageous if the means for attaching the Garnabzugsdüse on the - viewed in Garnabzugsrichtung - downstream end of Garnabzugsdüse are attached. This makes it possible to achieve a particularly compact design. It is provided that the annular contact surface is arranged in the region of the end face of the cylindrical guide surface, and that the means for fixing in the region of the annular contact surface opposite end of the cylindrical guide surface are arranged.

The Garnabzugsdüsen used in the open-end spinning machines available today on the market have a length of about 18 mm. As already mentioned, they are held by permanent magnets in the channel plate adapter. If means are provided for fastening the Garnabzugsdüse, which are at the same time means for securing the swirl-blocking element, it is advantageous that the length of the Garnabzugsdüse is greater than 18 mm, preferably 19 to 24 mm. Below this is the entire length of Garnabzugsdüse to be understood, which also includes the means for fixing. Such an increased length of the yarn take-off nozzle makes it possible to attach the means for fixing the yarn take-up nozzle outside the very narrow front region of the channel plate adapter.

It is advantageous if the swirl-blocking element or the yarn-drawing nozzle to a large extent consists of a good heat-conductive material, for example aluminum or its alloys. Particularly advantageously, the twist baffle element or the Garnabzugsdüse on a thermal conductivity of more than 150 W / mK (watts per meter and Kelvin). Due to its high thermal conductivity, the heat generated by the deflection of the yarn is well dissipated and thermal yarn damage is avoided at high yarn take-off speeds.

Further advantages and features of the invention will become apparent from the following description of some embodiments.

Figur 1

eine teilweise geschnittene Seitenansicht einer Offenend-Spinnvorrichtung im Bereich eines Kanalplattenadapters,

Figur 2

eine Ansicht ähnlich Figur 1 auf eine Variante des Kanalplattenadapters,

Figur 3

eine Ansicht ähnlich Figur 1 auf eine Variante mit einem zusätzlichen Wirbeleinsatz,

Figur 4

eine Teilansicht auf eine Variante eines Drallstauelementes nach Figur 2.

Show it:

FIG. 1

2 a partially sectioned side view of an open-end spinning device in the region of a channel plate adapter,

FIG. 2

1 is a view similar to FIG. 1 of a variant of the channel plate adapter,

FIG. 3

a view similar to Figure 1 on a variant with an additional vertebral insert,

FIG. 4

a partial view of a variant of a spin dam element of Figure 2.

FIG. 1 shows a spinning rotor 1 of an open-end spinning device in a rotor housing 3 closed by a cover 2. The spinning rotor 1 consists in a known manner of a rotor plate 4 and a shaft 5 which is mounted and driven in a manner not shown.

In operation, the rotor plate 4 runs in a likewise known manner in a negative pressure chamber 6, which is formed by the rotor housing 3. The rotor housing 3 is closed during operation with a cover 2 which can be moved away for maintenance purposes. A ring seal 7 ensures the seal between the cover 2 and the rotor housing. 3

On the cover 2, which is often referred to as a channel plate, a substantially rotationally symmetrical trained channel plate adapter 8 is arranged as a replaceable extension, which protrudes partially into the interior of the rotor cup 4. In this cover 2, a portion 9 of a Faserzuführkanals 10 is arranged, which extends from an opening roller, not shown, to the rotor cup 4. The fiber feed channel 10 is shown in dashed lines, since it does not run in the plane of the drawing. With the arrow A, the fiber transport direction is referred to, wherein the fiber transport itself takes place in a known manner with the aid of the installed negative pressure. The end of the fiber feed channel 10 facing the rotor cup 4 is arranged in the channel plate adapter 8. Its outlet opening 11 projects into the interior of the rotor cup 4 and is located opposite a fiber sliding surface 12 of the rotor cup 4 at a small distance. The goal of the channel plate adapter 8 is to adapt the end region of the fiber feed channel 10 with its outlet opening 11 in particular to different diameters of the rotor cup 4. The channel plate adapter 8 is attached in a manner not shown, but in a manner known per se easily detachable on the cover 2.

The fiber sliding surface 12 widens conically to a fiber collecting groove 13, where the fibers fed to the fiber sliding surface 12 in a known manner slide and collect there to form a fiber ring, from where they are known in the art Way are shown as dotted line yarn 14 withdrawn. The spun yarn 14 is first drawn off in a plane lying approximately perpendicular to the shaft 5 of the spinning rotor 1 and then deflected by a Garnabzugsdüse 115 in a coaxial with the shaft 5 Garnabzugskanal 16. Subsequently, the yarn 14 is deflected at a twist dam element 117 again and deducted direction B and fed to a pair of withdrawal rollers, not shown, and a downstream winding device. For the yarn quality, it is advantageous if the yarn 14 is no longer deflected by further stationary yarn guide elements after the swirl-blocking element 117. In particular, no exhaust tube surrounding the yarn 14 should be present. Advantageously, the swirl-blocking element 117 is the last yarn guide element for the yarn 14 connected to the cover 2 (viewed in the drawing-off direction B).

The leg of the yarn 14 projecting from an end face 18 of the yarn draw-off nozzle 115 into the fiber collecting groove 13, as a result of the rotation of the spinning rotor 1, runs at high speed in the normal plane in the manner of a crank and produces a true rotation in the yarn 14. In addition, a false twist occurs in the yarn 14 due to a rolling movement of the yarn applied to the Garnabzugsdüse 115 occurring in the crank-like circulation. It is now the task of the twist blocking element 117 to accumulate the highest possible rotation in the initial region of the yarn 14. In particular, in the projecting into the fiber collecting groove 13 end of the yarn 14 as high a rotation is required to ensure good yarn formation.

The Garnabzugsdüse 115 for the embodiment of Figure 1 can be designed in any desired per se. However, a Garnabzugsdüse 115 has proven with a nozzle holder 119, in which at least one nozzle insert 20 is inserted. The nozzle holder 119 is inserted into the channel plate adapter 8 and is secured against slipping out by at least one permanent magnet 21. The nozzle insert 20 can be known per se Be provided with different structures and surfaces manner. In addition, the nozzle insert 20 may be formed in several parts in a manner not shown, so that, for example, still a vortex insert is provided.

The swirl-blocking element 117 has a substantially cylindrical receptacle 22 which can be inserted directly into the channel plate adapter 8. Furthermore, means 123 for fastening the swirl-blocking element 117 are provided on the swirl-blocking element 117. In the case shown, the means 123 is designed for fastening as a bayonet closure. Alternatively, however, a single or multi-start thread can be provided on the receptacle 22.

In a so-called bayonet lock, a pin 124 is attached to the swirl dam member 117, which can cooperate with a groove 125 in the channel plate adapter 8. By rotation of the swirl blocking element 117 about its central axis, the pin 124 can be brought into a position corresponding to the groove 125, in which the swirl-blocking element 117 can be removed from the channel plate adapter 8. The insertion of a new twist blocking element 117 takes place in reverse order by the pin 124 is inserted into the groove 125 and then rotated. The advantage of the bayonet closure is that the opening and closing takes place simply and quickly, since the swirl-blocking element 117 only needs to be rotated by a small angle. In an embodiment, it is possible to provide two or more pins 124, each with an associated groove 125 distributed uniformly on the circumference of the receptacle 22 of the twist dam element 117.

The swirl-blocking element 117 has a substantially centric yarn take-off opening 26 which continues the yarn take-off passage 16 coaxially. The Garnabzugsöffnung 26 has to deflect the yarn 14 a funnel-shaped extension 27 with a deflection radius R. It may be advantageous to the Garnabzugsöffnung 26 and the funnel-shaped extension 27 with the deflection radius R in an insert 28 to be arranged, which is used in a main body 129 of the swirl dam member 117. The insert 28 may consist of a wear-resistant material and is advantageously formed rotationally symmetrical or segment-shaped. It may even be advantageous here to use an identically designed nozzle insert 20 from the Garnabzugsdüse 115 as an insert 28 for the swirl dam member 117. In addition to this multi-part design of the twist dam element 117, of course, a one-piece design can be provided in a manner not shown.

To change the properties of the spun yarn 14, it is now provided that the distance X of the deflection radius R from the end face 18 of the Garnabzugsdüse 115 is variable. The reference point should be the center of the deflection radius R. It is advantageous if the deflection radius R kink-free connects to the Garnabzugskanal 16. However, this is not essential. It is particularly advantageous if the swirl-blocking element 117 has a deflection radius R between 3 and 50 mm, preferably between 6 and 28 mm, and if the distance X of the deflection radius R from the end face 18 is between 9 and 80 mm, preferably between 18 and 42 mm, lies.

FIG. 2 shows a variant in which a means 223 for fastening simultaneously fixes the twist-blocking element 217 and the yarn-removal nozzle 215 in the channel plate adapter 8. The means 223 for fixing the swirl-blocking element 217 is designed as a bayonet closure cooperating with the yarn-drawing nozzle 215. In this case, a pin 224 is provided on the nozzle holder 219 of the Garnabzugsdüse 215, which can be positioned for releasing the connection by turning the Garnabzugsdüse 215 to a mounted in the base body 229 of the spin dam 217 groove 225. Alternatively, the fastening means 223 can, of course, be designed as a thread again, for example in the swirl-blocking element 217 Internal thread and the Garnabzugsdüse 215 an external thread is provided.

In this type of direct connection of Garnabzugsdüse 215 and twist blocking element 217, it is advantageous to attach to one of the two components, an anti-rotation element. If this anti-twist element 30 is mounted on the swirl-blocking element 217 in the region of the receptacle 22, then the swirl-blocking element 217 can not rotate during the rotation of the yarn-drawing nozzle 215 for the purpose of tightening or loosening the fastening means 223, which facilitates handling during assembly and Disassembly simplified.

In order for the Garnabzugsdüse 215 is rotatable and also displaceable in the axial direction of Garnabzugskanals 16, the Garnabzugsdüse 215 is received on a cylindrical guide surface 34 in the channel plate adapter 8. The Garnabzugsdüse 215 is located with an annular bearing surface 35 which is arranged coaxially to the cylindrical guide surface 34 and parallel to the end face 18, on the channel plate adapter 8 at. The cylindrical guide surface 34 advantageously has a diameter between 5 and 7 mm, so that the projecting into the spinning rotor 1 region of the channel plate adapter 8 can be made as small as possible and the open-end spinning device is also suitable for spinning rotors 1 small diameter.

The twist blocking element 217 is likewise displaceable in the axial direction of the yarn withdrawal opening 26 in the channel plate adapter 8, but can not be rotated because of the element 30 for preventing rotation. A spring element 36 is provided, which loads the twist-blocking element 217 defined in the axial direction of the yarn withdrawal opening 26 and presses the twist-blocking element 217 in the yarn withdrawal direction B. The spring element 36 may be, for example, a coil spring or a rubber element.

By connecting the swirl-blocking member 217 and the yarn-drawing nozzle 215 via the fastening means 223, the yarn-drawing nozzle 215 is also loaded by the spring member 36 in the yarn drawing direction B. The Garnabzugsdüse 215 is pulled with the annular abutment surface 35 against the channel plate adapter 8 and is safe there.

To change the position of the end face 18 with respect to the fiber collecting groove, it is known to insert washers between Garnabzugsdüse 215 and channel plate adapter 8 in the region of the annular abutment surface 35. An advantage of the axial displaceability of the swirl dam 217 and yarn take-off nozzle 215 is that when using washers, the distance X from the end face 18 of the Garnabzugsdüse 215 remains constant to the deflection radius R of the swirl dam 217.

Due to the limited space in the protruding into the spinning rotor 1 area of the channel plate adapter 8, in which yes the Garnöffnung 215 and the outlet opening 11 and a part of the Faserzuführkanals 10 must be accommodated, it is advantageous that the means 223 for fixing as far as possible downstream of the take-off direction B are arranged. The distance between the annular contact surface 35 and the means 223 for fastening can be at least 10 mm, preferably also more than 15 mm. In order that the means 223 for fixing the Garnabzugsdüse 215 is not in the confined area of the channel plate adapter 8, it is advantageous that the Garnabzugsdüse 215 has a length L of more than 18 mm. The length L is defined from the end face 18 to the end of the Garnabzugsdüse 215 in the region of the means 223 for fixing the Garnabzugsdüse 215.

Also for reasons of space, it is advantageous that the twist dam 217 surrounds the Garnabzugsdüse 215 as shown from the outside. The side facing away from the spinning rotor 1 of the channel plate adapter 8 no longer has to protrude into the spinning rotor 1 and therefore can easily larger be interpreted. In order to achieve a stable connection of the twist blocking element 217 with the Garnabzugsdüse 215 by the means 223 for fastening, the diameter of the substantially cylindrical receptacle 22 is advantageously about two to three times as large as the diameter of the cylindrical guide surface 34.

In a variant, not shown, it may be provided that the means 223 for fastening by a displacement of the twist dam 217 in the axial direction of the Garnabzugsöffnung 26 are unlocked. In this case, as means 223 for fastening, for example, radially movable spring tongues can be provided, which engage around the pin 224. The spring tongues can be moved radially outward by the axial displacement of the twist dam element 223 and release the pin 224. For this purpose, the spring tongues may be assigned a conical surface.

In the embodiment shown in FIG. 3, interchangeable eddy insert 31 is interposed between the yarn take-off nozzle 315 and the swirl damper 317 and is individually interchangeable between the yarn take-off nozzle 315 and the swirl damper 317 when the yarn take-off nozzle 315 and swirl damper 317 are secured by the means 323 for attachment to the machine Channel plate adapter 8 are connected. The means 323 for fixing is analogous to Figure 2 as a bayonet with at least one attached to the nozzle holder 319 pin 324 and attached to the base 329 groove 325 running and braces the swirl damper 317 with the Garnabzugsdüse 315. The swirl damper 317 is associated with a spring element 36 which loads the swirl-blocking element 317 defined in the axial direction of the yarn take-off opening 26 and allows the use of washers on the annular abutment surface 35 of the Garnabzugsdüse 315 without changing the distance X. Again, the means 323 for attaching course, again be a thread.

The receptacle 22 of the swirl element 317 again associated with an element 30 for preventing rotation. In order for the swirl insert 31 to be defined in a defined manner between the yarn take-off nozzle 315 and the swirl-blocking element 317, an elastic element 32, for example a rubber ring in the form of an O-ring, can be provided. Furthermore, extensions 33 may be provided on the base body 329, against which the vortex insert 31 rests. As a result, the insert 28 of the twist dam element 317 is not loaded with the clamping forces. In an analogous manner, the vortex insert 31 could also be supported directly on the nozzle holder 319.

FIG. 4 shows a variant of a twist-blocking element 217 according to FIG. 2 in side view and front view. The means 223 for fastening and the receptacle 22 in the channel plate adapter 8 take place as already described in FIG. In contrast to the rotationally symmetrical insert 28 in FIG. 2, in the variant according to FIG. 4, a segment-shaped insert 428 is provided in a base body 229 of the twist blocking element 217. The segment-shaped insert 428 covers in the example shown only half of the Garnabzugsöffnung 26 and the funnel-shaped extension 27 from. The production of the insert 428 is cheaper by the smaller size. Depending on the run of the spun yarn 14, the insert 428 may even cover a smaller circle segment, for example only a quarter circle.

With reference to FIGS. 2 to 4, it is expressly pointed out that the same components are provided with the same reference numerals as in FIG. 1 and reference is therefore made to the description there. All components with the same reference numerals, even those with other design, have the same function with respect to the yarn production, therefore, can be dispensed with a repeated description. In particular, the description of the characteristics of the deflection radius R and the distance X of course also apply to the embodiments of Figures 2, 3 and 4.

By the embodiments of the twist accumulation elements 117, 217, 317 shown in FIGS. 1 to 4, in addition to particularly variable spacings X - in particular small distances X of less than 25 mm - it is also possible to realize assemblies for the fiber feed and the yarn take-off of an open-end spinning device, which can be replaced with only a small machine downtime. The assemblies consist essentially of the channel plate adapter 8, in which all the yarn take-off in spinning technology important components, in particular Garnabzugsdüse 115, 215, 315 and twist accumulation element 117, 217, 317, can be pre-assembled.

Claims (30)

An open-end spinning device with a cover (2) closing a rotor housing (3), wherein a fiber feed and a yarn take-off take place through a replaceable channel plate adapter (8) mounted in the cover (2), and wherein the yarn take-off is fed through a yarn take-off nozzle (115; 215; 315 ) and at least one downstream and easily replaceable swirl-accumulation element (117; 217; 317) having a substantially centric yarn-removal opening (26), characterized in that swirl-stagnation element (117; 217; 317) can be inserted directly into the channel-plate adapter (8). An open-end spinning device according to claim 1, characterized in that the swirl-blocking element (117; 217; 317) is the last yarn guide element connected to the cover (2) in the take-off direction (B). An assembly for the fiber feed and the yarn take-off of an open-end spinning device with a channel plate adapter (8) and an easily replaceable yarn take-off nozzle (115; 215; 315), characterized in that the channel plate adapter (8) has an easily exchangeable swirl-blocking element (117; 217; 317) with a substantially centric Garnabzugsöffnung (26). An assembly according to claim 3, characterized in that means (123; 223; 323; 21) are provided for fixing to the swirl-stagnation element (117; 217; 317) and the yarn take-off nozzle (115; 215; 315). An assembly according to claim 4, characterized in that said means (223; 323) for fixing fix at the same time the swirl-stagnation element (217; 317) and the yarn take-off nozzle (215; 315) in the channel plate adapter (8). An assembly according to any one of claims 3 to 5, characterized in that the swirl-blocking element (217; 317) is displaceable in the axial direction of the Garnabzugsöffnung (26), and that a spring element (36) is provided which defines the swirl-blocking element (217; 317) loaded in the axial direction of the Garnabzugsöffnung (26). An assembly according to any one of claims 3 to 6, characterized in that the means (223) for fixing by a displacement of the twist accumulation element (217) in the axial direction of the Garnabzugsöffnung (26) are unlocked. Assembly according to one of claims 3 to 7, characterized in that the Garnabzugsdüse is displaceable together with the twist accumulation element (217; 317) in the axial direction of the Garnabzugsöffnung (26), wherein the distance (X) of a deflection radius (R) of the twist accumulation element (217th 317) from the end face (18) of the Garnabzugsdüse (215; 315) remains constant during a displacement. An assembly according to any one of claims 3 to 8, characterized in that the distance (X) of a deflection radius (R) of the twist blocking element (117; 217; 317) from the end face (18) of the Garnabzugsdüse (115; 215; 315) between 9 and 80 mm, preferably between 18 and 42 mm. Assembly according to one of claims 3 to 9, characterized in that between the Garnabzugsdüse (315) and the Spin dam element (317) an exchangeable vortex insert (31) is fixed. A channel plate adapter (8) for an open-end spinning apparatus having a fiber feed channel (10) having an exit opening (11) and a cylindrical guide surface (34) for a yarn draw nozzle (115; 215; 315) located on the same side of the channel plate adapter (11). 8) as the outlet opening (11) of the Faserzuführkanals (10) is arranged, characterized in that the channel plate adapter (8) has a substantially cylindrical receptacle (22) for a swirl accumulation element (117; 217; 317), which on the cylindrical Guide surface (34) opposite side of the channel plate adapter (8) is arranged. Channel plate adapter according to claim 11, characterized in that an element (30) for preventing rotation in the region of the substantially cylindrical receptacle (22) is arranged. Channel plate adapter according to claim 11 or 12, characterized in that the diameter of the substantially cylindrical receptacle (22) is greater than, in particular about two to three times as large as, the diameter of the cylindrical guide surface (34). A yarn take-off nozzle for insertion into a channel plate adapter (8) of an open-end spinning device, wherein easily releasable means (223; 323) are provided for attachment to the yarn take-off nozzle (215; 315), characterized in that the means (223; Garnabzugsdüse (215; 315) at the same time means (223; 323) for fixing a also in the channel plate adapter (8) can be used twist accumulation element (217; 317) are. Yarn withdrawal nozzle having an end face (18) and a yarn withdrawal channel (16) arranged perpendicular thereto, with an annular abutment surface (35) arranged parallel to the end face (18), with a cylindrical guide surface (34) concentric with the yarn withdrawal channel (16). in that the annular contact surface (35) is arranged in the region of the end face (16) of the cylindrical guide surface (34), and in that the means (223; 323) are arranged for fastening in the region of the annular contact surface (35) opposite the end of the cylindrical guide surface (34). A yarn take-off nozzle according to claim 14 or 15, characterized in that the yarn take-off nozzle (215; 315) has at least one nozzle insert (20) inserted into a nozzle holder (219; 319) and in that the means (223; 323) for fixing the yarn take-off nozzle (215 315) are arranged on the nozzle holder (219; 319). Yarn withdrawal nozzle according to one of claims 14 to 16, characterized in that the means (223; 323) for fixing the Garnabzugsdüse (215; 315) include a thread. Yarn withdrawal nozzle according to one of claims 14 to 16, characterized in that the means (223; 323) for fastening comprises at least one pin (224; 324) of a bayonet closure. Garnabzugsdüse according to one of claims 14 to 18, characterized in that the cylindrical guide surface (34) has a diameter between 5 and 7 mm. Garnabzugsdüse according to one of claims 14 to 19, characterized in that the distance between the annular abutment surface (35) and the means (223; 323) for fixing at least 10 mm, in particular at least 15 mm. Thread take-off nozzle according to one of Claims 14 to 20, characterized in that the length (L) of the yarn take-off nozzle (215; 315) is greater than 18 mm. Twist blocking element (117; 217; 317) for the yarn take-off of an open-end spinning device with a substantially centric yarn withdrawal opening (26) and with a receptacle (22) which can be inserted and removed easily into the open-end spinning device, characterized in that the receptacle (22) can be used directly in a channel plate adapter (8) of the open-end spinning device. A swirl-blocking element (117; 217; 317) according to claim 22, characterized in that the receptacle (22) is substantially cylindrical. A twist-blocking element (217; 317) according to claim 22 or 23, characterized in that the receptacle (22) contains an element (30) for preventing rotation. A twist blocking element (217) for the yarn withdrawal of an open-end spinning device, comprising a substantially centric yarn withdrawal opening (26) with a substantially cylindrical receptacle (22) and an element for preventing rotation, characterized in that the element (30) for preventing rotation in the area the substantially cylindrical receptacle (22) is arranged. The swirl-blocking element (117; 217; 317) according to one of claims 22 to 25, characterized in that the receptacle (22) is attached to a base body (129; 229; 329) of the swirl-blocking element (117; 217; 317) which comprises at least one Insert (28, 428) contains. The swirl-blocking element (117, 217, 317) according to claim 26, characterized in that the insert (28) is substantially rotationally symmetrical. The swirl-blocking element (117, 217, 317) according to claim 26, characterized in that the insert (428) is segment-shaped. The swirl-blocking element (117; 217; 317) according to one of claims 22 to 28, characterized in that the swirl-blocking element (117; 217; 317) has a deflection radius (R) between 3 and 50 mm, preferably between 6 and 28 mm. The swirl-blocking element (117; 217; 317) according to any one of claims 23 to 29, characterized in that the substantially cylindrical receptacle (22) has a diameter between 15 and 25 mm, in particular about 18 mm.

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