JP4319858B2 - Thread guide and thread guide support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a yarn guide for guiding a traveling synthetic yarn, and is provided with a spiral guide section that forms a guide eye, and preferably a straight fixed section. , In which the fixed section is firmly connected to the guide section. A yarn guide support used to guide a plurality of yarns traveling in parallel and having a plurality of yarn guides arranged on the same plane with a pitch interval A therebetween, the yarn guide support Are each of the type formed by a spirally configured guide section forming a guide eye and preferably a straight fixed section rigidly connected to the guide section.
[0002]
[Prior art]
In order to guide the yarn, a yarn guide is used in an apparatus for manufacturing or processing the yarn, for example a melt spinning machine. Thereby, a predetermined guide track of the yarn can be maintained from one processing stage to the next processing stage. In this case, a thread guide known as a pig tail-shaped thread guide is generally used because of its shape. Such a thread guide is formed into a spirally configured guide section that forms a guide eye for the thread and a fixed section that extends substantially straight. Such a yarn guide is known, for example, from German Offenlegungsschrift 3,520,864. In this case, the guide section and the fixed section are formed from round wire members.
[0003]
When guiding a plurality of yarns running in parallel, there is often a desire to achieve as small a yarn spacing as possible between each yarn. When using known thread guides, however, in order to maintain a small thread guide width, the problem arises that the guide section has only a relatively small radius of curvature to guide the thread inside the eye. To do. Therefore, a high surface load with a correspondingly high friction is created on the yarn guide, and this high friction causes local heating and thus yarn damage. Another disadvantage is that the guide section basically has little strength.
[0004]
[Patent Document 1]
German Patent Application Publication No. 3520864 Specification
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to improve such a thread guide so as to form a guide eye having a contact surface as large as possible, and at the same time, slightly enlarge the outside of the thread guide.
[0006]
Another problem of the present invention is that a guide eye formed on a yarn guide in a yarn guide support body having a plurality of yarn guides realizes a minimum yarn interval while maintaining an ideal size yarn contact. Is to do so.
[0007]
[Means for Solving the Problems]
According to the yarn guide of the present invention that solves this problem, the guide section has an asymmetric profile cross section with a curved portion only on one side facing the guide eye.
[0008]
As a result, the maximum contact surface for guiding the yarn is generated in the range of the yarn eye. Based on the asymmetric profile cross-section, the side of the guide section opposite the guide eye may be arbitrarily formed or have a shape adapted to the periphery. In this case, however, care must be taken so that the thread guide for passing the thread through the thread eye is not damaged. The curvature of the guide section on the side facing the guide eye is preferably formed to be greater than 2 mm, so that a sufficient contact surface is formed to guide the yarn.
[0009]
A particularly advantageous production is when the profile cross section is formed in a semicircular or semi-elliptical shape. This allows a helical deformation of the guide section to be formed in a simple manner while maintaining the necessary curvature within the guide eye. The guide section is in this case preferably made of ceramic or made of a ceramic-coated support material.
[0010]
According to the yarn guide support body having a plurality of yarn guides according to the present invention that solves this problem, the guide section of the yarn guide is asymmetric with a curved portion having a radius of curvature on the side facing the yarn guide eye. The distance between two adjacent yarn guides is smaller than 4 times the radius of curvature of the curved portion.
[0011]
【The invention's effect】
Thereby, the yarn can be guided at a narrow pitch provided by the yarn guide support. Thus, it is possible to reduce yarn friction, especially when guiding the yarn in a spinning device, and at the same time to maintain a slight pitch, advantageously less than 15 mm. Reduced yarn friction has a direct effect on improving yarn quality in such processes.
[0012]
Advantageous further configurations are described in the dependent claims.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of a yarn guide according to the invention, and FIG. 2 shows an embodiment of a yarn guide support according to the invention.
[0014]
FIG. 1 shows a view of a yarn guide according to the invention from various directions. 1.1 is a side view of the yarn guide, FIG. 1.2 is a plan view, and FIG. 1.3 is a cross-sectional view. The following description applies to all drawings unless a clear association is made for one of the drawings.
[0015]
The yarn guide according to the invention is formed in a fixed section 4 and a guide section 3. The fixed section 4 and the guide section 3 are firmly connected to each other. The fixed section 4 is formed straight, preferably in the form of a hollow cylinder. The guide section 3 forms a guide eye 5 in a spiral shape. The free end of this guide section 3 is aligned in the direction of the fixed section 4. As shown in FIG. 1.3, the guide section 3 is configured with an asymmetric profile cross section 8. In this case, the profile cross section 8 is basically formed by the curved portion 7 on one side surface of the guide section 3 and by the flat portion 10 on the correspondingly disposed side surface. In this embodiment, the radius of curvature R of the curved portion 7 is selected such that the profile cross section (Profilquerschnitt) 8 has a substantially semicircular shape. In this case, the side surface of the guide section 3 with the curved portion 7 forms a contact surface inside the guide eye 5. The side of the guide section 3 with the flat part 10 is thus visible on the outside.
[0016]
In order to guide the yarn, the yarn is first passed through the guide section 3 formed in a spiral and then guided along the bend 7 in the guide eye 5. In FIG. 1.3, the thread is indicated by 9.
[0017]
In one embodiment, the curved portion is formed with a radius of curvature of 3 mm. The flat portion 10 provided on the correspondingly arranged side surface of the guide section 3 gave a thread guide width of about 7 mm, in which case the diameter of the guide eye 5 was about 1 mm. Guide section 3 was manufactured from a ceramic material.
[0018]
In the embodiment shown in FIG. 1, the fixed section 4 has a round cross section compared to the guide section 3. However, the thread guide is advantageously configured in such a way that both the guide section 3 and the fixed section 4 have an asymmetric profile cross section. In order to maintain as large a contact surface as possible for guiding the yarn, the profile cross section has a particularly semi-elliptical shape. However, in this case, the curved portion provided on one side surface of the guide section 3 is formed unevenly, whereby the curved portion 7 is constituted by, for example, two different radii of curvature, and the yarn is introduced into the guide eye 5. It is also possible to maintain the yarn lead-out differently.
[0019]
FIG. 2 shows a plurality of schematic views of the yarn guide support according to the invention. FIG. 2.1 shows a plan view of the yarn guide support, and FIG. 2.2 shows a cross-sectional view of the yarn guide support.
[0020]
The following description applies to both drawings unless one of the drawings is clearly linked. In this embodiment, the yarn guide support 2 supports three yarn guides 1.1, 1.2, and 1.3 arranged adjacent to each other. The yarn guides 1.1, 1.2, and 1.3 are respectively formed in the same manner as the embodiment of the yarn guide shown in FIG. As far as this is concerned, it is related to the above explanation.
[0021]
The yarn guides 1.1, 1.2, 1.3 are arranged on the yarn guide support 2 with a pitch interval A. In this case, the side surfaces of the guide section 3 with the flat portion 10 are arranged directly facing each other. The pitch interval A is a ratio with respect to the curvature radius of the curved portion 7 provided in the guide section 3 of the yarn guides 1.1, 1.2, and 1.3. The pitch interval A is more than four times the curvature radius R. Selected to be smaller. By maintaining the ratio A <4R, the bending portion 7 forms the yarn guides 1.1, 1.2, and 1.3, and the contact surface for guiding the yarn has sufficient strength at the minimum yarn pitch. And friction stability. Therefore, such a thread guide support can advantageously be used in a POY / FDY device with 10 or 12 laps, and a small thread spacing is achieved. This makes it possible to use inexpensive units that do not protrude long to process and process the yarn. Further, since the yarn friction inside the yarn guide is reduced, good spun yarn quality can be obtained with a melt spinning machine.
[Brief description of the drawings]
FIG. 1.1 is a side view of a yarn guide according to the present invention, FIG. 1.2 is a plan view of the yarn guide according to the present invention, and FIG. 1.3 is a cross-sectional view of the yarn guide according to the present invention. It is.
FIG. 2.1 is a plan view of a yarn guide support according to the present invention, and FIG. 2.2 is a cross-sectional view of the yarn guide support according to the present invention.
[Explanation of symbols]
1 thread guide, 2 thread guide support, 3 guide section, 4 fixed section, 5 guide eye, 7 curved section, 8 profile cross section,
9 threads, 10 flats, A spacing, R radius of curvature

Claims (4)

  A yarn guide for guiding the traveling synthetic yarn, provided with a guide section (3) configured in a spiral to form a guide eye (5), preferably a straight fixed section (4) In which the fixed section (4) is firmly connected to the guide section (3), the one side of the guide section (3) facing the guide eye (5) Only has a semicircular or semi-elliptical profile cross section (8) with a curved portion (7) with as large a contact surface as possible, said curved portion (7) having a radius of curvature greater than 2 mm A yarn guide characterized by comprising:   2. The yarn guide according to claim 1, wherein the guide section (3) is made of ceramic or coated with ceramic. A plurality of yarn guides (1.1, 1.2, 1.3) used to guide a plurality of yarns traveling in parallel and arranged on the same plane while maintaining a pitch interval (A) to each other are provided. A thread guide support, the thread guide support being rigidly coupled to the guide section (3), each of which is formed in a spiral form forming a guide eye (5), and to the guide section (3) The guide section (3) of the thread guide (1.1, 1.2, 1.3) is preferably of the type formed by a straight fixed section (4), the thread guide eye (5). A semicircular or semi-elliptical profile cross section (8) with a curved portion (7) having a radius of curvature (R) on the side facing the curved portion (7), the curved portion (7) being 2 mm It has a radius of curvature larger than the yarn guide pitch (a) of curvature and a half Less than 4 times the (R) (A <4R), wherein the yarn guide support used to guide the plurality of yarns running parallel to. Guide section (3) is made of ceramic or are ceramic coating, the yarn guide support according to claim 3 Symbol placement of the yarn guide (1.1, 1.2, 1.3).

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