JP2000226742A - Apparatus for producing twined yarn and fiber feding tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for producing a twined yarn containing a compactly formed spinning and twining device. SOLUTION: This apparatus has a double yarn twining spindle A having at least two spinning rotors provided in a balloon of a yarn generated with a twining process for producing individual yarn to be twined and the spinning rotor is fed with a fiber material separated through a fiber feeding tube 8 from a fiber material separating unit 3. The twined yarn is produced by an integrated and combined spinning and twining process. A fiber material separating device B is arranged at least partially below the double yarn spindle A and adjacent each spindle is mutually arranged in relatively closed with each other. Each fiber feeding tube 8 has an arc-like region in a part of its length and a ratio of a direction changing angle (α) to a radius of curvature (r) of a center line of the tube (α/r) is in a range of 2.5-3.5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention comprises a double twisted yarn spindle having at least two spinning rotors for producing individual yarns to be twisted disposed within a balloon of yarns formed by a twisting process. An integrated spinning and twisting process for producing a twisted yarn,
The present invention relates to an apparatus in which decomposed fiber material is supplied to these spinning rotors through respective associated fiber supply tubes connected to a fiber material decomposition unit.

[0002]

BACKGROUND OF THE INVENTION As disclosed in German Patent Publication 43 31 801 C1, in such a device the decomposed fiber material is placed in a double-twisted spindle in order to produce two spun yarns. It is supplied to two mounted open-end spinning rotors. The two rotors of this document have essentially the function of a supply bobbin of a conventional double twist spindle, which would otherwise be provided. That is,
The individual spun yarns produced with these two spinning rotors are further processed and twisted in the same manner as they are withdrawn from the two supply bobbins in the form of yarn.

German Patent Publication 43 07 296 C1 discloses a fluid medium, such as a decomposed fibrous material, which is conveyed by airflow from its diametrically facing position into a space defined by a yarn balloon created by the spinning process. Discloses a conventional double-twisted spindle provided with a. German Patent Publication 37 34 544 C2 relates to a supply channel provided between a fiber material splitting unit and an open-end spinning rotor. This supply channel has a shape slightly offset from the straight line by a slight angle. The first longitudinal section of the channel tapers in the direction of fiber transport so that the air carrying the fiber is accelerated to accelerate the fibers suspended therein, such that the fibers are stretched and aligned in parallel. ing. Because the fibers have a greater inertia than air, the fibers cannot reach the same velocity in the first longitudinal section as the air flowing therethrough. For this reason, downstream of this conically tapering first longitudinal section is connected to a substantially cylindrical longitudinal section at an obtuse angle, in which the air has its velocity Does not substantially change, but the fibers are post-accelerated. The fibers have the opportunity to stabilize their attitude during this adjustment to the speed of the air. The fiber supply channel is configured so that the fibers are not as biased as possible as a whole on the path from the fiber material decomposition unit to the spinning unit.

[0004]

SUMMARY OF THE INVENTION The present invention provides for as many integrated and combined spinning and twisting as possible, each with a required fiber material disintegration unit, for a predetermined machine length. It is an object of the present invention to provide an apparatus for manufacturing a twisted yarn capable of maintaining a space in which the apparatus can be mounted, and a fiber supply tube suitable for use in the apparatus.

[0005]

As a solution to achieve this object, an apparatus having the features of claim 1 is provided. Further embodiments of the invention are disclosed in the dependent claims. Of particular importance are the features or combinations thereof set forth in each of claims 5 to 8, which ensures a reliable supply of the fiber material to the spinning rotor. Due to the curved shape of the fiber supply tube, the width of the fibrous material decomposer each having two decomposition units can be reduced.

[0006] The present invention also relates to a curved fiber supply tube for fiber material conveyed through the fiber supply tube by suction airflow. In order to ensure that the fibers are transported undisturbed between closely spaced fiber material processing units, a tube having the features of claim 10 has been proposed. With reference to the attached drawings,
Hereinafter, the present invention will be described in more detail.

[0007]

FIG. 1 is a detailed view of a double twisting spindle A as part of a combined double twisting machine. The double twist spindle A is represented by its outer housing 2. The center axis of the twisted spindle of this outer housing 2 is inclined relative to the vertical by 68 ° to 78 °, preferably 72 °, with respect to the partially represented frame 1. Due to this inclined arrangement of the double twist spindle, its action and the lid of the outer housing 2.
Service work after removing 1 becomes easier, and the height of the whole machine becomes lower.

On the upstream side of the double twisting spindle A,
A fiber material decomposer B comprising two schematically represented fiber material decomposer units 3 is arranged in which the fiber sliver FB coming from the sliver can 5 is supplied by a conventional supply roller 4. Downstream of these two supply rollers 4, a fiber material decomposition roller 7 is arranged.
The disassembly roller 7 for the disassembly unit 3 on the left is schematically shown in the figure.

In the housing 6 of the fiber material decomposition apparatus B,
Two drive motors are arranged, one motor operating two supply rollers 4 and the other motor operating two disassembly rollers 7. As shown in FIG. 2, each of the disassembling units 3 supplies the fiber to the open-end spinning rotor 9 installed inside the double-twisted spindle A so as to supply the opened or decomposed fiber material. The tube 8 is connected to the housing 2 of the double twist spindle A. Only one of these two spinning rotors 9 arranged axially symmetrically on the double twisting spindle, ie the left-hand spinning rotor 9, is shown.

This double-twist spindle A with an integrated spinning rotor 9, shown only partially in FIG. 2, is of the conventional combined spinning and processing type disclosed in German Patent Publication 43 31 801 C1. It is a twist system. In the known combined spinning and twisting process employing a double twisting spindle, the basic idea is that the fiber material supplied through the rotating balloon of the twisting spindle consists of at least two spun yarns. That it is used directly to produce The fiber material is supplied on the one hand to the spinning rotor so that it does not disturb the fiber balloon, and on the other hand the fiber material is supplied as a separate stream and the space formed by the yarn balloon is a plurality of open end spinning rotor features. Is enough space to accommodate the spinning device. The spun yarn removed from the spinning rotor is both guided via a hollow spindle shaft and a yarn balloon. Therefore, these two spinning rotors and their driving mechanism are installed in the space occupied by the supply bobbin in the conventional double twisting method.

Referring to FIG. 2, for each spinning rotor 9,
The fiber material is introduced into the spindle through the envelope formed by the yarn balloon or the yarn guide tube 10a corresponding to this yarn balloon. These two spinning rotors 9 are driven by an electric motor in a direction opposite to the direction of rotation of the spindle rotor of the double twisting spindle. The spun yarns f1 and f2 are taken upward from each spinning rotor and introduced into the hollow shaft 10 of the double twisted spindle. The yarn guided downward through this hollow spindle shaft 10 is then further conveyed radially outward through a conventional yarn guide channel (not shown) and along the yarn guide rotating with the spindle rotor. Can be turned upwards. The thread is then transported to the center eye 2.2 of the center point of the lid 2.1 of the housing 2 and the center eye
2.2, it is guided successively to the take-out device 12 via the direction-changing roller 11 located therefrom, and from there to the conventional yarn winding device C.

Instead of the yarn guide channel 10a, the yarn balloon may be guided along a known balloon restricting means of a double twist yarn spindle. In this known spinning and twisting process, either the yarn forming the ballooning or the yarn guide tube 10a, at its upper part,
Once in each revolution, the fiber stream supplied through each fiber supply tube 8 is encountered. This fiber material is supplied directly into the spinning rotor 9 via a fiber material supply channel 13 connected to the fiber supply tube 8.

The supply of cracked fiber material to the open-end spinning rotor 9 according to German Patent Publication 43 31 801 C1 is via a vacuum tube extending in the region of the hollow spindle shaft and having its outer end connected to a vacuum source. This is done by the vacuum generated in the region of the spinning rotor. An air channel is connected to the interior of the vacuum tube and the air channel is configured such that it creates a pressure gradient in the fiber feed tube of the spinning rotor. This pressure gradient is formed in the fiber supply direction, so that the fiber supply to the spinning rotor is performed smoothly.

In this regard, it should be noted that the present invention is not tied to the concept and construction of the combined or integrated spinning and twisting apparatus, but rather to the outer housing 2 of the double twisted spindle A. And is exclusively concerned with the related concept of the supply of fibrous material into the space enclosed by the. The concept is essentially that the fiber material decomposer B is used in tight spaces so that a reliable supply of the fiber material to the spinning rotor in the double-twist spindle and easy access to the double-twist spindle are achieved. To be linked to each double twisted yarn spindle A. But,
It is also desired that the fibrous material cracking device comprise only a minimal number of drive elements.

The best access to the double twist spindles is to incline each double twist spindle A with respect to the vertical by a certain angle and remove the cover 2.1 of the housing so that the interior of the double twist spindle is substantially inside. It is to be able to access directly. By inclining the double twisting spindle, a space for mounting the fiber material decomposing device B is formed below the device, and the two disassembling units 3 of the device B are arranged in the diametrical direction of the outer housing 2 of the double twisting spindle A. Are connected by a fiber supply tube 8 at a position facing the. For this purpose, these two fiber feeding tubes 8 have a turning angle α of 95 to 105 ° and a radius of curvature r of a size of 30 to 40 mm passing through the center line of the tubes.
And a curved section having: In order to optimally align the fibers flowing through the fiber supply tube 8, the fiber supply tube preferably has an inner diameter of 8 mm at the beginning of the curve and 6 mm at the end in this arcuate region. This reduction in diameter is linear or continuous.

Due to the dimensions of such a fiber feed tube 8, especially in the arc-shaped region, the negative effects of turbulence and secondary flows occurring in the curved part, in particular in the inner curved region, during the transport of the fibrous material are substantial. Disappears.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a double-twist spindle incorporating a spinning rotor.

FIG. 2 is a detailed broken view showing a part of the double twisting spindle of FIG. 1;

FIG. 3 is a sectional view showing a fiber supply tube used in the present invention.

[Explanation of symbols]

 2 ... Housing 3 ... Disassembly unit 4 ... Supply roller 8 ... Supply tube 9 ... Spinning rotor

Continued on the front page (72) Inventor Karl-Joseph Brookmanns Germany, 47877 Billich, Jacob-Krebs-Strase 80 (72) Inventor Ingo Hiltz Germany, 41747 Vielsen, Gross-Brichstrasse 40 a (72) Inventor Laurant Kreis, Germany, 47918 Tennis Forst, Linkstrasse 8 (72) Inventor Stephane Cloth, Germany, 41951 Vielsen, Erlenbeek 24 (72) Inventor Guido Spicus, Germany, Karlstedt, Tsai Sikhbake 3

Claims (14)

[Claims] 1. A twin-twist spindle having at least two spinning rotors for producing individual yarns to be twisted installed in a balloon of yarns formed by a twisting process, the spinning rotor being provided with Is supplied with decomposed fiber material through the respective fiber supply tube, said fiber supply tube being cut off only in the region of the yarn balloon or yarn guide tube (10a) and connected to the fiber material decomposition unit. An apparatus for producing a twisted yarn by an integrated and combined spinning and twisting process, wherein the fiber material decomposition unit (3)
Is combined with a fiber material decomposer (B) having a common drive element for both fiber material decomposer units (3), said fiber material decomposer at least partially of the double-twisted spindle (A). An apparatus characterized by being disposed below. 2. The double-twisted spindle (A) is arranged at a central portion above the fiber material supply device (B), and its central axis is inclined with respect to a vertical line. Item 10. The apparatus according to Item 1. 3. The double-twisted spindle (A) according to claim 2, wherein the central axis of the double-twisted spindle (A) is arranged at an inclination angle of 68 to 76 °, preferably 72 ° with respect to a vertical line. apparatus. 4. The double-twisted spindle (A) has a lid (2.
It has an outer housing (2) with 1), which lid has a central opening (2.2) and on its outside a turning roller (1).
4. The device according to claim 1, wherein the device supports (1). 5. The fiber supply tube (8) is curved in an arc over a part of its length, and the turning angle α is 95 ° or more.
The ratio α / r is in the range of 105 ° and the ratio α / r to the radius of curvature (r) of the center line of the fiber supply tube is 2.5 to 3.5. An apparatus according to claim 1. 6. The device according to claim 5, wherein the turning angle α is within 98.8 °. 7. The apparatus according to claim 5, wherein a radius of curvature (r) with respect to a center line of the fiber supply tube is in a range of 30 to 40 mm, preferably 35 mm. 8. The apparatus according to claim 6, wherein the inner diameter of the fiber supply tube at the curved portion is continuously reduced from 8 mm to 6 mm. 9. Two spinning rotors (9) are axially symmetrically arranged with respect to a central axis of the double twisting spindle (A),
9. The fiber feed tube according to claim 1, wherein the fiber supply tube is connected to a portion of the outer housing of the double-twisted spindle which faces diametrically. 10. The described device. 10. A fiber supply tube for conveying decomposed fiber material by a compressed air flow or a suction air flow, the fiber supply tube having an arcuate portion over a part of its length,
The turning angle α of the curvature is in the range of 95 ° to 105 °,
A fiber supply tube, wherein the ratio α / r is in the range of 2.5 to 3.6 with respect to the radius of curvature (r) of the center line of the fiber supply tube. 11. The fiber supply tube according to claim 10, wherein the radius of curvature (r) has a size of 30 to 40 mm. 12. The fiber supply tube according to claim 11, wherein the radius of curvature (r) has a size of 35 mm. 13. The bending angle, that is, the turning angle α is 98.
The fiber supply tube according to claim 10, which is within 8 °. 14. The fiber supply tube according to claim 10, wherein the inner diameter of the curved region continuously decreases from 8 mm to 6 mm.