JPH026635A - Open end spinning apparatus and method - Google Patents

Abstract

PURPOSE: To obtain an open-end spinning device applicable in a simple method for different rotors and rotor diameters, in which there are two sections in the longitudinal direction of a second part of a fiber feed tubular path in a rotor cap and these center lines have an obuse angle. CONSTITUTION: A fiber feed tubular path 4 have a first part 40 formed in an open-end cilinder housing 6 and a second part 41 in a rotor cap 3. The second part is bisected in the longitudinal direction, the center lines of sections 410 and 411 have an abuse angle α. By changing the angle, without changing the direction of a fiber feed tubular path part in the rotor cap, a device is applicable for different rotor sizes and shapes.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to an open cylinder housing, an exchangeable spinning rotor, a rotor lid belonging to the spinning rotor and a sectioned cylinder extending from the opening cylinder housing to the rotor lid. An open-end spinning device comprising a fiber supply conduit, comprising:
The first part of the fiber supply pipe is located in the opening cylinder hanging, the second part of which relates to a device that is cast into the rotor lid, as well as a method of manufacturing such a device.

(Prior Art) In order to separate the fiber supply line and thus to make the spinning rotor accessible for maintenance and replacement purposes, the part of the fiber supply line in front of the spinning rotor is swung together with a lid to separate the spinning rotor. It is known to be able to separate it from the rotor (DE-A-2033226). The part of the fiber feed line in the rotor tube is then already conical for fluidics reasons so that the rotor lid and the fiber feed line can be produced by casting or die casting without any problems.

Furthermore, it is known that different spinning rotors can be used in the spinning device and that the rotor cover should also be adapted accordingly (DE-OS 21 30 582). For certain rotor sizes, the second part of the fiber supply conduit must be placed at an angle with respect to the first part of the fiber supply conduit, so that the fibers can successfully enter the spinning rotor. Must not be. This type of configuration imposes severe structural constraints on the spinning apparatus with respect to the relative positioning of the spinning rotor and opening cylinder housing, the size of the rotor, etc., and also presents disadvantages in fluidics.

OBJECTS OF THE INVENTION It is therefore an object of the invention to provide an open-end spinning device and a method that allows adaptation to different rotors and rotor diameters in a simple manner without changing the arrangement of the rotor housing and opening cylinder. That's true.

DESCRIPTION OF THE INVENTION This problem is solved according to the invention in that the second section of the fiber supply conduit has two longitudinal sections whose center lines form an obtuse angle. By corresponding selection of this angle, an adaptation to different rotor sizes and shapes can be achieved without changing the direction of fiber feed into the fiber feed line section located in the rotor lid. This angle is then still so small that the transport of the fibers is essentially not adversely affected;
Rotors of various shapes and sizes can be used without changing the relative arrangement of the spinning rotor and the opening cylinder, and various fibers of different lengths can be spun with the same open-end spinning device, providing great flexibility. will be achieved. When the fiber length is changed, not only the spinning rotor but also the rotor lid must be replaced.

According to the invention, both longitudinal sections are separated from the first section so that the rotor cover can be manufactured by the casting or gitast method irrespective of the bent shape of the section of the fiber supply conduit in the rotor cover. They are at their smallest cross-sectional area at the point of transition to the two sections and are arranged to widen towards their mutually opposite ends. This type of construction presupposes that the fiber supply conduit can be created using a split core and that the section of box 2 can therefore be placed at an angle with the first section if necessary. to do. For intermediate-sized rotors, the portion within the rotor lid can then optionally have a straight shape.

At the transition point between the first and second sections, it is advantageous if at the transition point the diameter of the first section is equal to The sections are smaller than those prepared.

In another form of the subject of the invention, the first longitudinal section of the second part of the fiber supply conduit is arranged so that the first longitudinal section of the second part of the fiber supply conduit is connected to the first part of the fiber supply conduit and the first section of its second part. and the transition angle between the first section and the second section are essentially the same magnitude, the second section being within the spinning rotor. The fibers are oriented corresponding to the desired direction of feeding into the fibers.

A rotor lid of this type provides a gentle fiber transport and, moreover, can be manufactured in a simple manner by casting or die-casting.

In order to be able to adapt the fiber feed direction into the spinning rotor in an optimal manner to different rotor diameters, the transition angle between the first and second parts of the fiber feed line and the fiber feed line may be advantageously adjusted. The transition angles between the first and second sections of the second portion of the second section of the second section of the second section are provided in different planes.

In known rotor lids manufactured by casting or die-casting methods, it is possible to pull out the fiber supply conduit portion inside the rotor lid in the opposite direction to the fiber transport direction after the core has been cast from the rotor lid. In order to ensure this, it was necessary to stretch the film to a greater or lesser extent. The inlet aperture of the second part of the fiber supply conduit is therefore made large to ensure that the fibers can reach into the second part even in the case of an angular arrangement with respect to the first part of the fiber supply conduit. had to be done.

In this way, due to the unavoidable expansion of the pipe cross-sectional area at the point where the first and second sections of the fiber supply pipe are divided, the airflow is decelerated and the fibers also lose their parallelism to some extent. To avoid this disadvantage, it is advantageous in a refinement of the object of the invention that the inlet of the first longitudinal section of the second part of the fiber supply line has a cross-sectional area essentially equal to that of the first longitudinal section of the fiber supply line. It is prepared to match the cross-sectional area of the exit of part 1. Despite the advantage that the air flow is not slowed down between the opening cylinder housing and the spinning rotor inlet, which can be achieved in this way, the advantage remains that the rotor lid can be produced in a simple manner by casting or die-casting. .

In order to achieve this advantage that the airflow is never slowed down from the moment it leaves between the opening cylinder and the peripheral wall of the opening cylinder housing in which it is housed until the moment it reaches the interior of the spinning rotor, the present invention Advantageously, in a further form of the subject matter, the inlet cross-section of the first part of the fiber supply conduit also essentially consists solely of the free space between the opening cylinder and its hanging immediately before the inlet of the fiber supply conduit. It is prepared so that the cross-sectional area is the same as that of the

In order to produce an open-end spinning device of this kind with a spinning rotor that is interchangeable with spinning rotors of different sizes and/or shapes, the invention provides that two cores are inserted into a mold and their end faces are pressed against each other. The cores are sized so that they have a minimum cross-sectional area in the area of their mutual contact, and the cores are prepared to be drawn out of the fiber supply conduit in opposite directions after casting is completed. be. The division of the core is such that the fiber supply pipe is now divided into two sections in the length direction within the rotor tube, and the second section is divided into two sections depending on its shape and/or length.
Alternatively, it is assumed that the rotor lid differs in its arrangement from the first section of this fiber supply conduit. Thereby, this second section can be shaped or oriented in comparison to the first section in such a way that it cannot be pulled out of the rotor lid in a direction opposite to the direction of subsequent fiber transport with a one-piece core.

As mentioned above, it is possible in all cases to convey the fibers in a straight line from the opening cylinder to the inner wall of the loaf when changing the spinning rotor to one with a smaller or larger diameter without changing the arrangement of the opening cylinder and spinning rotor. isn't it. In order to accommodate this difference in rotor diameter, the invention provides for the casting process to position both cores with respect to each other such that their center lines form an obtuse angle. In this way, an obtusely curved fiber supply conduit section is formed in the rotor lid, allowing the fibers to reach the spinning rotor in the desired direction.

In order to draw and orient the fibers reaching the second part of the fiber supply conduit in the transport direction, in particular a first section of the length of the fiber supply conduit on the later inlet side is formed. The core has a tapered cross-sectional area. Since the fibers cannot be rapidly accelerated into the air channel carrying them, a further form of the invention provides, in particular, a core forming the second section on the discharge side from the rear in the length of the fiber supply conduit. The idea is to essentially have a shape with a constant cross-sectional area. The fibers are thus given the opportunity to be accelerated to the speed of the air carrying them before reaching the fiber collection surface of the spinning rotor.

In principle, the air flow carrying the fibers strives to have as little deflection as possible and thus not to adversely affect the fiber orientation. For this reason, in a further version of the method according to the invention, it is advantageous to form the outlet side of the fiber feed line later, when a deflection is unavoidable. The cores for the second section of the section of the fiber supply conduit 2 are oriented correspondingly to the direction of subsequent fiber feed into the spinning rotor, while the cores for the second section of the section of the fiber supply conduit 2 are oriented correspondingly to the longitudinal direction of the second section of the fiber supply conduit. The segmentation cores are designed such that the angle between the center lines of both cores is essentially the same as the direction in which the fibers are later fed into the first section of the fiber supply line during operation. Second
and the centerline of the first section of the portion. In this way, the necessary deflection is divided into two locations, each of which is small and does not have an interfering effect on the fiber transport.

The invention makes it possible in a simple manner that the fiber supply conduit in the rotor lid can also be formed by casting and die-casting when it does not extend in a straight line but has a bent shape. In this way, even when a plurality of spinning rotors of different diameters or shapes are to be used in the spinning apparatus, the same rotor lid can be used at low cost. Complex fitting of tubes into the rotor lid is eliminated. This eliminates possible sources of defects during this adaptation.

The various embodiments will be explained in more detail with reference to the drawings below: FIG. 5 shows an open-end spinning device with a spinning rotor 1 mounted in a housing 2 in the usual manner.

The housing 2 is made by casting or die-casting and is covered by a rotor lid 3, which is also made by casting or die-casting, and which contains the fiber supply line 4 as well as the threading thread 5. The fiber supply line 4 includes a first part 4o formed in the open cylinder housing 6 and a second part 41 located in the rotor lid 3.

In the opening cylinder housing 6 there is an opening cylinder 60, upstream of which there is a cotton feeding device 61, which in the illustrated embodiment has a cotton feeding cylinder 610 and an associated elastic coating. It consists of a supply tank 611, which is a feeder.

During the spinning operation, the fiber strip 7 is fed into an opening cylinder 60 in a known manner, and is opened into fibers by the opening cylinder 6°, and in this form is fed into the spinning rotor 1, where the fibers 70 are It is spread out in the form of a fiber ring (not shown), which is continuously fed into the end of the yarn 71, which in turn leaves the spinning rotor 1 through the yarn guide tube 5.

The quality of the yarn 71 mainly depends on the properties of the fibers 70 collected in the fiber collecting grooves of the spinning rotor 1. The fiber is therefore subjected to a fiber drawing process while it is conveyed from the opening cylinder 60 to the spinning rotor 1. Since the portion 40 of the fiber supply conduit 4 located within the opening cylinder housing is relatively short, fiber drawing is essentially limited to the fiber supply conduit 4.
This is done in the second part 41 of .

For reasons explained in more detail below, the second portion 41 of the fiber supply conduit 4 is divided into two longitudinal sections 410 and 411, both of which are located within the rotor lid 3. The first section 410 tapers in the direction of fiber transport (see arrow P). The air flow carrying the fibers is thus accelerated, which in turn accelerates the fibers 70 suspended therein, thereby also elongating the fibers and aligning them in parallel. But fiber 70
has a large inertia compared to air and cannot reach the same velocity as the carrier air flow within this section 410. For this reason, the second section 411 following the conical first section is essentially cylindrical. In this second section 411 the air flow does not significantly change its velocity, while in the section 411 of the fibers 70 it undergoes additional acceleration. The fiber 70 then has the opportunity to settle into its position while adapting to the air velocity.

FIG. 1 shows a section 41 of a conventional fiber supply line 40. As shown in FIG.

As can be seen, the second section 411 is an extension of the first section 410. In this case, a core 8 can be inserted into the mold during production using the casting or die-casting process, the core extending over the entire length of the section 41 of the fiber supply line 4 and being oriented in the direction opposite to the subsequent direction of fiber transport. A second part 41 of the fiber supply line 4 in the rotor lid 3, opposite to the arrow P
It can be pulled out completely. For this purpose, this second section 4I of the fiber supply conduit 4 has a diameter d on the inlet side but a first
is larger than the diameter d2 at the transition point from section 410 to second section 411.

The diameter d2 is also the diameter d at the outlet of the fiber supply line 4 from the rotor lid 3, ie at the outlet end of the section 411 of the rabbit 2.
Greater than 3.

FIG. 2 shows the structure of another known fiber supply conduit, in which the second section 411 also has a center line M of the first section 410 relative to a center line M2 of the second section 411. When the first section 410 is arranged at an angle, it is also in a plane with respect to the first section 410. Here again, the section 4 of the fiber supply line 4
It is possible to use a core 80 that extends over the entire length of the core 80. This is because there will be no problem in pulling it out from the cast rotor lid 3 later.

The portion 41 of the fiber supply conduit 4 shown in FIG.
The structure of the second part is significantly different from that of the second part. As is exaggerated in this figure, it is true that the first division 4
The diameter d of the inlet end of 10 is from the first section 410 to the second section 410.
is larger than the diameter d2 at the transition point S2 to the section 411 of the cylinder 2, while the diameter d3 at the exit of the section 411 of the tube 2 is also larger than the diameter d2. Moreover, not only are the center lines M and M2 of both sections 410411 disposed at an obtuse angle to each other, but the second section 411 as a whole has a peripheral wall of the second section 411 with respect to the first section 410. No longer the first
is not arranged on an extension of the circumferential wall of the section 410 and does not extend into the section 41 of the fiber supply conduit 4. The one-piece cores 8 to 80 used according to FIGS. 1 and 2 cannot therefore be pulled out of the rotor lid 3 at all; in this type of configuration of the fiber supply line 4, the one-piece cores 8 to 80 (FIG. 1) or 80 (Fig. 2) cannot be used.

For the casting of the fiber feed line according to FIG.
Two cores 81 (for the first section 410) and 82 (for the second section 411) are provided. These cores are inserted into a mold (not shown) for the casting process with their swinging ends 810 and 820 in contact with each other.

The cores 81 and 82 have a minimum cross-sectional area in their contact area, ie at the transition point from the first section 410 to the second section 411, which corresponds to the diameter d2. After production of the casting, i.e. the cast rotor lid 3, the cores 81 and 82 are pulled out of the section 41 of the fiber supply line 4 in mutually opposite directions.

If flash is generated at the transition point S2 at this time, it can be removed by polishing, sandblasting, or the like. In order to facilitate this removal, as shown in FIG.
It can be prepared to be 5. This thing is-
In the fiber supply conduit 4 which is completed by easily removing the flash using a burr, it is ensured that no flash protrudes into the fiber passage.

Figures 1 to 3 show the three main diameters d, , d2 and d3.
is the indication. In the sense of the invention, these diameters are in each case understood to be cross-sections which may deviate from a circle. What is important is simply that the dimension perpendicular to the longitudinal direction in the area of the cross-section characterized by the diameter d1 is greater than the corresponding dimension in the area of the cross-section characterized by the diameter d2. The same applies equally to the cross section characterized by diameters d2 and d3. In practice, in the area of the inlet cross-section characterized by dl, the portion 41 is essentially an elongated cross-section of rectangular or other shape, while the diameter d2
It was introduced that the cross section in the range of and d3 is circular.

In open-end spinning apparatuses suitable for using spinning rotors 1 of varying shapes and diameters, the mutual arrangement of the opening cylinder housing 6 and the housing 2 of the spinning rotor 1 is usually an intermediate one. The size of the rotor is chosen such that the fiber supply conduit 4 can assume an essentially elongated shape. In this way, the fibers are transferred to the opening cylinder 6.
After leaving 0, it reaches the inside of the spinning rotor 1 through a linear path. Depending on the shape or diameter of the rotor, it is necessary to vary the fiber transport path in order to achieve an optimal delivery of the fibers 70 to the inner circumferential wall of the spinning rotor 1.

However, the arrangement of the housing 2 of the spinning rotor 1 and the opening cylinder housing 6 cannot be changed. In addition to the spinning rotor 1 and the rotor lid 3, which must be adapted anyway to the selected spinning rotor 1, the opening cylinder housing 6 is now also replaced so that the parts 40 and 41 can take on a new stretched shape. It would be pointless to do so. This is further explained by the fact that the protrusion 30 of the rotor lid 3 protruding into the spinning rotor 1 does not result in the fiber supply line 4 in the stretched position modified in this way when the rotor is small in size. It's impossible.

As shown in FIG.
10, 411 within the rotor lid 3, there is a second part 41 of the fiber supply line 4, which is arranged differently depending on the size and shape of the chosen rotor. The section 411 of the box 2 is then optimally adapted to the spinning rotor 1 so that the fibers 70 are placed in the desired direction and in the desired position on the spinning rotor 1.
The orientation is such that it reaches the inner circumferential wall of. For this reason, both categories 4
10,411, whose center lines M1 and M2 are obtuse angle α
(FIGS. 3 and 4) to T (FIG. 6). Correspondingly, for casting, both cores 81 and 82 must also be inserted into a mold (not shown).

The first section 410 is designed as a connecting section between the first section 40 of the fiber supply line 4 and the second section 411 of its second section 41, in which case the fibers 70 are The orientation is such that the deflection experienced in the path from the cotton cylinder hanging 6 to the spinning rotor 1 is as small as possible. The necessary fiber transfer path diversions are therefore required between the first section and the second section of the fiber supply line 4 on the one hand, and between the first section and the second section of the second section of the fiber supply line 4 on the other hand. It is divided into two transition points S1 and S2 (see FIG. 4) between the two sections. Transition point S1 from the first part 40 to the second part 41 of the fiber supply conduit 4 and its second part 41
The angles β and α are entered at the transition point S2 from the first section 410 to the second section 411. Fiber supply pipe 4
The angle β between the center line M of the first section 40 of the second section 410 and the center line M1 of the first section 410 of the second section is in this case essentially the angle β between the center line M of the first section 40 of the second section 410 of Divisions 410 and 4
is chosen to be the same magnitude as the angle α between the center lines M1 and M2 of 11. For this purpose, a core 82 for the second section 411 is inserted in preparation for the casting or die-casting process.
are oriented according to the direction in which the fibers 70 arrive into the spinning loaf 1 during the subsequent spinning operation, and the division 41 of one method 1 is
The cores 81 for 0 are such that the angle α between their center lines M1 and M2 is such that the fibers 70 are transferred from the first part 40 of the fiber supply line 4 to its second part 41 during subsequent operation. The direction of arrival (center line M) and the first section 410 of the second part 41
is oriented so that the angle β between the center line M and the center line M of

However, as a comparison of FIGS. 5 and 6 shows, the conventional fiber supply conduit 4 is not simply bent in a single plane. Therefore, when replacing the spinning rotor 1 with one having a different diameter, it is also necessary to bend the fiber supply conduit in the second plane. This is necessary in order to make the feeding direction of the fibers 70 as parallel as possible to the direction of rotation of the spinning rotor 1 (see arrow R). Again, between the first part 40 and the second part of the fiber supply conduit 4 and the first part of the second part 41 thereof.
The angle δ between the section 410 and the second section 411 and T
It is true that the are chosen to be as large as possible. In practice, this would result in bending of the fiber supply conduit 4 in two different planes resulting in other angular quantities from the angles β and δ and α and T, but this is for simple illustration reasons. Not shown.

Also, in order to accommodate these different fiber transport directions, the transition between the first section 40 and the second section 41 of the fiber supply conduit 4 is realized by turning in different planes at the beginning and end of the fiber supply conduit. The angle β to δ is the second part 41
It may be necessary for the transition angle α to T between the two sections 410° 411 to lie in a different plane.

In FIGS. 5 and 6, in each case, solid lines indicate the arrangement of the fiber supply lines 4 for a rotor of intermediate size, while dashed lines indicate the fiber supply lines 4 for a spinning rotor 1 of large diameter, and dashed lines indicate the fiber supply lines 4. This represents the fiber supply line 4 for the spinning rotor 1 with a small diameter.

As shown in FIG. 5, the transition point S between the first section 40 and the second section 41 of the fiber supply conduit is located at the opening cylinder.
It is formed by a separation point between the housing 6 and the rotor cover 3. The fiber 70 is attached to this opening cylinder/hanging 6.
The diameter d of the inlet of the first section 410 of the second part 41 of the fiber supply line 4 must therefore be (
The cross-sectional area (cross-sectional area) of the outlet end of the first portion 40 is
d4) must be slightly larger than d4).

At the level of conventionally known technology, the second
Due to the necessity of giving the section 41 essentially an elongated shape, the inlet cross-sectional area d1 of its second section 41 often has to be significantly larger than the outlet cross-sectional area d of its first section 40. It was not, but now the cross-sectional area (diameter) a
+ can be essentially the same size as the cross-sectional area (diameter) d4. This has a favorable influence on fiber orientation. This is because the velocity of the airflow as a transport medium for the fibers 70 is not significantly affected.

For this reason, as shown in FIG. The cross-sectional area of the free space between them is essentially the same size as Q.

The above description shows that the device can be modified in various ways, in particular by replacing features with equivalent features or by other combinations. Therefore, the image portion 40 of the fiber supply conduit.
The angle β, T between 41 can be chosen as required, and the mutual arrangement of the two sections 410, 411 of the second part 41 of the fiber supply line can likewise be selected. Individual sections 40 of the fiber supply conduit
and 41 can also have various shapes. The second section 411 has a different length compared to the first section, and in that case is enlarged to a greater or lesser extent, and the core 82 is
can be made into a form that can be extracted from this. In order to avoid a negative influence on the airflow velocity, it is advantageous to choose the enlargement of the section 411 as small as possible so that it remains substantially unaffected on the airflow velocity. The core 82 for the second section 411 is shaped for this purpose in such a way that, although it has an essentially constant cross-sectional area, it is still possible to withdraw the core 82 from the section 411 without difficulty.

In principle, it is possible to manufacture the rotor M3 in which the section 41 of the fiber supply line 4 located therein is bent in any manner. For example, the conical section 410 is manufactured by casting, and is optionally shaped accordingly. The insert for forming section 410 can be cast and section 411 can be made by drilling. In the embodiment described above, the section 41 of the fiber supply line 4 in the rotor lid 3 is cast in its entirety. This is because this is particularly advantageous in manufacturing.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a known fiber supply conduit, FIG. 2 is a schematic sectional view of another conventional conventionally shaped fiber supply conduit, and FIG. 3 is a structure of a fiber supply conduit according to the present invention. FIG. 4 is a schematic cross-sectional view of the entire fiber supply line from the open cotton cylinder housing to the rotor lid; FIG. FIG. 6 is a schematic cross-sectional view of an open-end spinning device constructed in accordance with the present invention in relation to various rotor diameters. DESCRIPTION OF SYMBOLS 1... Spinning rotor, 2... Housing, 3... Rotor lid, 30... Loaf lid protrusion, 4... Fiber supply conduit, 40... First part, 41...・Second part, 410...First division of the second part, 411...
・Second division, 5... Thread drawing tube, 6... Cotton opening cylinder housing, 60... Cotton opening cylinder, 61...
- Cotton feeding device, 610... Cotton feeding cylinder, 611...
Cotton feeding tank, 7... Fiber belt, 70... Fiber, 71...
Thread, 8, 80... Core, 81... Core (for the first division), 82... Core (L for the second division) 810...
End face of core 81, 820... End face of core 82, d,...
d2. d3. d4. d5゜d6...Diameter, M, M,,
M3...center line, S,, S2...transition point, α, β
, γ, δ...transition angle.

Claims (11)

[Claims] (1) An open-end spinning device comprising an opening cylinder housing, a replaceable spinning rotor, a rotor lid associated with the spinning rotor, and a segmented fiber supply line extending from the opening cylinder housing to the rotor lid, The first part of the fiber supply conduit is in the open cotton cylinder housing, the second part of which is located in the fiber supply conduit (4) inside the rotor lid (3) in a device cast into the rotor lid. Second
There are two sections (410, 411) in the length direction, and their center lines (M_1, M_2) are obtuse angles (α, γ)
An open-end spinning device characterized by: (2) an open-end spinning device comprising an opening cylinder housing, a replaceable spinning rotor, a rotor lid associated with the spinning rotor, and a segmented fiber supply conduit extending from the opening cylinder housing to the rotor lid; In particular, the device according to claim 1, wherein the first part of the fiber supply conduit is in the opening cylinder housing and the second part is cast in the rotor lid. 4
10, 411) have a minimum cross-sectional area (d_2) at the transition point (S_2) from the first section (410) to the second section (411), and expand toward the ends that are separated from each other. An open-end spinning device characterized by: (3) Transition point (S
_2), the cross-sectional area (d_
Claim (2) characterized in that 5) is smaller.
The device described. (4) The first longitudinal section (410) of the second portion (41) of the fiber supply conduit (4) is connected to the first portion (40) of the fiber supply conduit (4) and the fiber supply conduit (4). The fiber angles (β, δ) of the second portion (41) of the conduit (4) with the first longitudinal section (410) and the first longitudinal section (410) and the second longitudinal section (410) The second section (411) is oriented such that the transition angles (α, γ) between the second section (411) and the first section (411) are essentially the same magnitude; Claim (1) characterized in that the fibers are oriented according to a desired fiber feeding direction.
) to (3). (5) The first and second portions (40
, 41) and between the first and second longitudinal sections (410, 4) of the second portion (41) of the fiber feed channel (4).
4. Device according to claim 4, characterized in that the transition angles (β, δ; α, γ) between 11) lie in different planes. (6) The inlet of the first longitudinal section (410) of the second part (41) of the fiber supply conduit (4) has a cross-sectional area (d
One of claims (1) to (5), characterized in that _1) essentially corresponds to the cross-sectional area (d_4) of the outlet of the first part (40) of the fiber supply conduit (4). The device described in. (7) The entrance cross-sectional area (Q_2) of the first portion (40) of the fiber supply pipe (4) is the same as that of the opening cylinder (60) immediately before the entrance opening of the fiber supply pipe (4). Claim (1) characterized in that it has essentially the same size as the cross-sectional area (Q_1) of the free space between it and the cylinder housing (6).
) to (6). (8) A method for manufacturing an open-end spinning device equipped with a rotor lid according to any one of claims (1) to (6), wherein the fiber supply pipe is formed in a mold for a rotor lid prior to casting. In the case where cores are inserted into a mold and pulled out from the fiber supply pipe after casting, two cores are inserted into a mold with their end surfaces in contact with each other, and the size of the cores is determined by their size. The method is characterized in that the respective minimum cross-sectional areas are determined in the area of mutual contact, and the cores are withdrawn from the fiber supply conduit in mutually opposite directions after the end of casting. (9) A method according to claim (8), characterized in that both cores are arranged such that their center lines form an obtuse angle with respect to each other. (10) The core forming the second longitudinal section of the fiber supply conduit has an essentially constant cross-sectional shape. Method. (11) The cores for the second longitudinal section are oriented according to the direction of fiber feed into the subsequent spinning rotor, while the cores for the first longitudinal section are aligned with both cores. The angle between the centerline is later in the direction in which the fibers are fed into the first section of the fiber supply conduit during operation and the center of the first segment in the lengthwise direction of the second section of the fiber supply conduit. Claims characterized in that:
9) or the method described in (10).