JP2004003101A - Yarn guide and yarn guide-supporting body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn guide for guiding a traveling synthetic yarn, installed with a guide partition 3 constituted spirally for forming a guide eye 5, advantageously installed with a straight fixed partition 4, in the form of firmly bonding the fixed partition 4 with the guide partition 3, forming a guide eye equipped with a large contact surface as large as possible and at the same time limitting the expansion of the outside of the yarn guide as little. <P>SOLUTION: This yarn guide is provided by forming the guide partition 3 to have an asymmetric profile cross section 8 equipped with a curved part 7 at one side surface facing to the guide eye 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is a yarn guide for guiding a traveling synthetic yarn, in which a spirally formed guide section forming a guide eye is provided, advantageously a straight fixing section is provided. , Wherein the fixed section is rigidly connected to the guide section. A yarn guide support provided with a plurality of yarn guides used for guiding a plurality of yarns traveling in parallel and arranged on the same plane with a pitch interval A therebetween, wherein the yarn guide support is provided. Each of which is formed by a helically configured guide section forming a guide eye and an advantageously straight fixed section rigidly connected to the guide section.
[0002]
[Prior art]
To guide the yarn, a yarn guide is used in an apparatus for producing or processing the yarn, for example a melt spinning machine. This allows the predetermined guide path of the yarn to be maintained from one processing stage to the next. In this case, a yarn guide, known in particular from its shape as a pig tail yarn guide, is generally used. Such a thread guide is formed into a spirally shaped guide section forming a guide eye for the thread and a substantially straightened fixed section. Such a thread guide is known, for example, from DE-A 35 20 864. 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 the smallest possible yarn spacing between each yarn. With the known thread guides, however, the problem arises that in order to maintain a small thread guide width, the guide section has only a relatively small radius of curvature for guiding the thread inside the eye. I do. Therefore, a high surface load with a correspondingly high friction is produced in the yarn guide, which causes local heating and thus yarn damage. Another disadvantage is that the guide sections have essentially little strength.
[0004]
[Patent Document 1]
German Patent Application DE 35 20 864 A1
[Problems to be solved by the invention]
It is an object of the present invention to improve such a thread guide so as to form a guide eye with as large a contact surface as possible, while at the same time minimizing the outside expansion of the thread guide.
[0006]
Another object of the present invention is to provide a yarn guide support having a plurality of yarn guides, wherein a guide eye formed on the yarn guide realizes a minimum yarn interval while maintaining a yarn contact of an ideal size. Is to do so.
[0007]
[Means for Solving the Problems]
According to the yarn guide of the invention, which solves this problem, the guide section has an asymmetric profile cross section with a bend only on one side facing the guide eye.
[0008]
This creates a maximum contact surface for guiding the yarn in the area of the yarn eye. Due to the asymmetrical 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, care must be taken not to damage the thread guide for passing the thread through the thread eye. The curvature provided on the side of the guide section facing the guide eye is advantageously formed to be greater than 2 mm, so that a sufficient contact surface for guiding the yarn is formed.
[0009]
It is particularly advantageous if the profile cross section has a semicircular or semielliptical shape. In this way, a helical deformation of the guide section can be formed in a simple manner, while maintaining the required curvature in the area of the guide eye. The guide section is in this case preferably made of ceramic or of a ceramic-coated support material.
[0010]
According to the yarn guide support having a plurality of yarn guides of the present invention which solves this problem, the guide section of the yarn guide has an asymmetrical shape having a curved portion having a radius of curvature on a side surface facing the yarn guide eye. The distance between two adjacent yarn guides is formed to be smaller than four times the radius of curvature of the curved portion.
[0011]
【The invention's effect】
This allows the yarn to be guided at the narrow pitch provided by the yarn guide support. It is thus possible to reduce the 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. The reduced yarn friction has a direct effect on improving the yarn quality in such a process.
[0012]
Further advantageous configurations are set out in the dependent claims.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of the yarn guide according to the invention, and FIG. 2 shows an embodiment of the yarn guide support according to the invention.
[0014]
FIG. 1 shows views of the thread guide according to the invention from various directions. FIG. 1.1 shows a side view of the yarn guide, FIG. 1.2 shows a plan view, and FIG. 1.3 shows a cross sectional view. The following description applies to all drawings, unless a clear association is made with one of the drawings.
[0015]
The thread 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 fixing 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 ends of this guide section 3 are aligned in the direction of the fixed section 4. As shown in FIG. 1.3, the guide section 3 has an asymmetrical profile cross section 8. This profile cross section 8 is in this case basically formed on one side of the guide section 3 by a curved portion 7 and on the correspondingly arranged side by a flattened portion 10. In this embodiment, the radius of curvature R of the bend 7 is selected in such a way that the profile cross section 8 has a substantially semicircular shape. The side of the guide section 3 provided with the bend 7 forms the internal contact surface of the guide eye 5 in this case. The side of the guide section 3 with the flattened part 10 is therefore visible to the outside.
[0016]
To guide the thread, the thread is first passed through a spirally formed guide section 3 and guided along a curve 7 in a guide eye 5. In FIG. 1.3, the yarn is designated by the reference numeral 9.
[0017]
In one embodiment, the curved portion is formed with a radius of curvature of 3 mm. The flat section 10 provided on the correspondingly arranged side of the guide section 3 provided 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 made of a ceramic material.
[0018]
In the embodiment shown in FIG. 1, the fixing section 4 has a round cross section compared to the guide section 3. However, the yarn guide is preferably designed 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 the largest possible contact area for guiding the yarn, the profile cross section has a particularly semi-elliptical shape. In this case, however, the curved portion provided on one side of the guide section 3 is formed unequally, so that the curved portion 7 is constituted, for example, by two different radii of curvature, and the yarn introduction in the guide eye 5 It is also possible to keep the thread and the thread lead-out different.
[0019]
FIG. 2 shows several schematic views of a thread guide support according to the invention. FIG. 2.1 shows a plan view of the thread guide support, and FIG. 2.2 shows a sectional view of the thread guide support.
[0020]
Unless explicitly associated with one of the figures, the following description applies to both figures. The thread guide support 2 supports in this embodiment three thread guides 1.1, 1.2, 1.3 arranged adjacent to one another. The thread guides 1.1, 1.2, 1.3 are each formed identically to the previously described embodiment of the thread guide of FIG. To this extent, 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 part 10 are arranged directly opposite one another. The pitch interval A is a ratio of the curvature radius of the curved portion 7 provided in the guide section 3 of the yarn guide 1.1, 1.2, 1.3 to the pitch interval A, which is greater than four times the radius of curvature R. It has been chosen to be smaller. By maintaining the ratio A <4R, the contact surface for guiding the yarn formed on the yarn guides 1.1, 1.2, 1.3 by the curved portion 7 has sufficient strength at the minimum yarn pitch. And frictional stability. Therefore, such a yarn guide support can advantageously be used in a POY / FDY device with 10 or 12 laps, and a small thread spacing is realized. This allows the use of low-cost 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 the melt spinning machine.
[Brief description of the drawings]
1 is a side view of a thread guide according to the invention, FIG. 1.2 is a plan view of the thread guide according to the invention, and FIG. 1.3 is a cross-sectional view of the thread guide according to the 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 thread, 10 flat part, A interval, R radius of curvature

Claims (8)

A thread guide for guiding a running synthetic thread, which is provided with a spirally arranged guide section (3) forming a guide eye (5), preferably a straight fixed section (4). And wherein the fixed section (4) is rigidly connected to the guide section (3), the guide section (3) having one side facing the guide eye (5) A yarn guide characterized by having an asymmetrical profile cross section (8) with only a bend (7). 2. The thread guide according to claim 1, wherein the bend has a radius of curvature of more than 2 mm. 3. The yarn guide according to claim 1, wherein the profile cross section has a semicircular or semielliptical shape. 4. The yarn guide as claimed in claim 1, wherein the guide section (3) is made of ceramic or is ceramic-coated. A plurality of yarn guides (1.1, 1.2, 1.3) which are used to guide a plurality of yarns traveling in parallel and which are arranged on the same plane with a pitch interval (A) therebetween are provided. A thread guide support, wherein the thread guide support is helically configured to form a guide eye (5), and is rigidly connected to the guide section (3). In the form advantageously formed by a straight fixing section (4), the guide section (3) of the thread guide (1.1, 1.2, 1.3) is provided with a thread guide eye (5). Has an asymmetrical profile cross section (8) with a bend (7) having a radius of curvature (R) on the side facing the side, and the pitch spacing (A) of the thread guides is such that the radius of curvature (R) Driving in parallel, characterized in that it is smaller than 4 times (A <4R) Yarn guide support to be used to guide the plurality of yarns. 6. The yarn guide carrier according to claim 5, wherein the radius of curvature (R) of the curved portion (7) of the guide section (3) is preferably greater than 2 mm. 7. The yarn guide carrier according to claim 5, wherein the profile cross section of the guide section has a semicircular or semielliptical shape. The guide section (3) of the thread guide (1.1, 1.2, 1.3) is made of ceramic or is ceramic-coated. A yarn guide support according to any one of claims 5 to 7.

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