JP2003292242A - False-twisting string winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding method eliminating untwilled thread at the time of winding false-twisting string, and obtaining the false-twisting string having excellent reeling property. <P>SOLUTION: In the winding method winding while changing winding width within a fixed period by a simultaneously starting/stopping drawing false- twisting machine, if assuming that a difference between the maximum width Xa and a minimum width Xb of the winding width within the fixed period is breaking Lx, the breaking amount Lx is gradually increased between a winding start and a winding end, and the shape of change in traverse width within the fixed period has a similar figure between shapes within any fixed period. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a false twisted textured yarn, and in particular, there is no traverse that tends to occur when the thickness of the yarn layer of the package is thin, and unwinding trouble that becomes a problem when the yarn layer is thick. The present invention relates to a method for winding a false-twisted textured yarn into an excellent package with no twist.

[0002]

2. Description of the Related Art Conventionally, as described in JP-A-58-78955, JP-A-2-110080, etc., in order to prevent unraveling of the end face of a package at the time of winding and to improve unwinding property. There is a winding method called end face collapse in which the winding width is changed with the winding time at a constant cycle. However, if the difference between the winding widths in a fixed cycle is L,
When L is constant, there is a problem in unwindability from the middle layer to the outer layer of the package when L is small, and there is a problem in that the L is increased in the innermost layer of the package, which makes it extremely difficult to satisfy both. Met. As a measure against the above, Japanese Patent Application Laid-Open No. 58-78955 discloses a method of changing L from the beginning of winding to the end of winding. However, the traverse width collapses from the end face collapse to the longest width or from the longest width to the end face collapse. It was disadvantageous for the drop because the trajectory of the movement changed rapidly.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and obtains a false twisted yarn excellent in traverse drop and unwinding property which are possessed during the winding of the conventional false twisted yarn described above. The task is to provide a method.

[0004]

[Means for Solving the Problems] The above-mentioned problem is a method of winding while changing the winding width within a constant cycle by a simultaneous false start / drawing false twisting machine, and the maximum width of the winding width within a constant cycle ( When the difference between Xa) and the shortest width (Xb) is defined as the collapse amount Lx, the collapse amount L between the winding start and the winding end.
This can be achieved by a method for winding a false twisted yarn, wherein x is gradually increased and the shape of the trajectory of the change in the traverse width within a fixed cycle is similar between shapes within an arbitrary fixed cycle.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

A general method for producing the false twisted textured yarn of the present invention is shown in FIG. The undrawn yarn 1 is drawn between the feed rollers 2 and 6, and at the same time, the heating device 3 and the cooling device 4 are passed to perform false twisting by the false twisting device 5. After that, the package 10 is obtained by the surface drive method that follows the rotation of the drive roller 9 by the reciprocating motion of the traverse guide 8 with the guide 7 as a fulcrum. When winding the package, the device of the winding portion is shown in FIG.

[0007] By moving the winding width variable rod 11 which is controlled for a fixed time to the left and right, the angle of the traverse guide 12 is forcibly changed so that the winding width is changed at a fixed cycle. FIG. 3 shows the breakage of the end face. Here, the winding width is changed at a constant cycle in order to prevent the edges of the both ends of the false twisted yarn package from being raised. It is known that a large edge on both ends of the package is advantageous for the cross-cutting that occurs in the false twisted yarn inner layer portion, but is disadvantageous for the releasing property of the surface layer portion.

Here, the greatest feature of the present invention is that, as shown in FIG. 4, the collapse amount Lx, which is the difference between the longest width and the shortest width of the winding width in a constant cycle, is gradually increased from the beginning to the end of winding,
And the shape of the trajectory of the change in traverse width within a certain period is
It is necessary that the shapes are similar to each other within an arbitrary fixed cycle, and by reducing the collapse amount Lx at the beginning of winding, the winding density of both end surfaces of the package inner layer portion rises, which is advantageous for traversing. Moreover, by increasing the collapse amount Lx toward the end of winding, it becomes possible to satisfy both unwinding properties. In addition, by making the shape of the trajectory of the actual traverse width similar between the shapes within an arbitrary fixed period, the traverse width in the package inner layer portion where Lx is small changes from the time when the end face collapses to the longest width or the longest width to the end face. The trajectories at the time of collapsing become gentle, which prevents abrupt changes in the traverse width and prevents the traverse from falling. The thickness of the winding layer of the false twisted yarn at the beginning of winding is K0, and the thickness of the winding layer at the end of winding is K.
When m is set, K0 to an arbitrary winding thickness K1 and an arbitrary winding thickness K2 to Km are set as constant collapse amounts, and K1
It is preferable to gradually increase the amount of collapse from K2 to K2 to form the package.

Further, the thickness K1 of the winding layer of the package is
10% or more and 30% or less of Km is effective against the trouble of the inner layer of the package, and more preferably 15% or more and 25%. L1 from K0 to K1 is 2% of Xa
A value of 6% or more is effective for trapping, and more preferably X
It is 3% or more and 5% or less of a. When L1 is less than 2% of Xa, when the yarn of the innermost layer of the package is woven or knitted and then dyed, the yarn density on both end faces is excessively increased, and streaks are likely to occur due to friction with the drive rollers, which is not preferable. Next, the thickness K2 of the thread layer is 50% or more of Km and 80
% Or less is advantageous for the unwinding property of the middle layer and thereafter, and preferably 5
5% or more and 65% or less is good. L2 after K2 is
6% or more and 16% or less of Xa is effective for unwinding, and more preferably 7% or more and 12% or less of Xa. If it is more than 16%, the change in the winding tension is too large due to the large change in the winding width, and the yarn talmi occurs during winding, making it difficult to stably wind. The method can be applied to any yarn as long as it is a false twisted yarn, and the same effect can be obtained.

[0010]

EXAMPLES The present invention will be described in detail below with reference to examples.
In the examples, the visual confirmation of the twill drop, the unwinding test at 1200 m / min, the dyeing streak by the tubular knitting of the innermost layer of the package, and the check of the yarn tarmi at the time of winding are as follows. The number of N was 50 in each level.

1. Visual confirmation of cross-cutting It was judged by the number of packages having one or more cross-cuts on one end surface. In addition, ◯ was passed.

◯: There is no twill drop in all packages.
Or two or less packages with one or more twill drops.

Δ: 3 or more and 5 or less packages with one or more twill on one end surface.

X: Six or more packages having one or more twill drops on one end surface.

2. Unwinding test at 1200 m / min. Judgment was made by the number of yarn breakages occurring when the winding package was unwound at each level N = 10. In addition, ◯ was passed.

○: No thread breakage ×: One or more thread breaks 3. Dyeing streaks with tubular knitting on the innermost layer of the package The dyed tubular knitted fabrics of all the packages were visually confirmed.

◯: No streak-like deeply dyed portion ×: There is streak-like deeply dyed portion 4. Confirmation of yarn talmi at the time of winding When the drawing false twisting machines were started simultaneously, the yarn talmi before the winding portion was visually confirmed.

Good: No thread lumps are generated.

X: Thread lumps are generated.

Example 1 Polyester false twisted yarn 167dtex-48 filament yarn was wound around a paper tube by a surface drive method by rotating a drive roller. The paper tube has a total length of 290 m
m, an outer diameter of 65 mm was used. Processing speed is 800m
/ Min, maximum winding width of 245 mm, 400 cpm, winding angle of 16 °, taper angle of 0 ° in straight winding so that the thickness of the yarn layer at the end of winding is 8.5 cm. It was carried out with a thread. The conditions for gradually increasing the collapse amount when winding are K1: 1.5 cm, K2: 5.0.
cm, L1: 12.0 mm, L2: 20.0 mm,
The collapsed shape of the end face was gradually increased with a similar shape. The visual confirmation of twill drop, the unwinding test at 1200 m / min, the dyeing streak by the tubular knitting dyeing of the innermost layer of the package, and the confirmation of the yarn tarmi at the time of winding all passed the above-mentioned evaluation methods, and excellent results were obtained. It was

Example 2 Winding was carried out in the same manner as in Example 1 except that K1: 0.0 cm and K2: 8.5 cm. Visual confirmation of twill drop, 1
All of the unwinding test at 200 m / min, the dyeing streaks by the tubular knitting of the innermost layer of the package, and the confirmation of the yarn tarumi at the time of winding were passed by the above-described evaluation methods, and excellent results were obtained.

COMPARATIVE EXAMPLE 1 Winding was carried out in the same manner as in Example 2 except that the amount of breakage of the end face was constant and L1: 20.0 mm. Although there was no problem in the unwinding test at 1200 m / min, the dyeing streaks in the innermost layer of the package by the tubular knitting, and the yarn tarmi check at the time of winding, there were 5 twilled packages.

Comparative Example 2 The amount of end face collapse was gradually reduced to K1: 1.5 cm, L1: 20.
It was wound in the same manner as in Example 1 except that the length was 0 mm and L2 was 12.0 mm. Although there was no problem in checking the dyeing streaks in the innermost layer of the package with the tubular knitting, and the thread tarmi when winding, there was one thread break in each of the two packages when unwinding at 1200 m / min, Falling 4
Occurred individually.

Comparative Example 3 Example 1 except that the shape of the end face collapse was changed to a different shape.
It was wound in the same way as. Although there was no problem in the unwinding test at 1200 m / min, the dyeing streaks in the innermost layer of the package by the tubular knitting, and the yarn lumpiness confirmation at the time of winding, there were three twill drops. The results obtained above are shown in Table 1.

[0025]

[Table 1]

[0026]

As described above, according to the method of the present invention, it is possible to obtain a drawn false-twisted yarn which prevents twill drop and has good unwinding property.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view illustrating a method for producing a false twist textured yarn.

FIG. 2 is a schematic explanatory view illustrating an end surface breaking mechanism.

FIG. 3 is a schematic explanatory view illustrating an end face breaking mechanism that changes a winding width at a constant cycle.

FIG. 4 is a schematic explanatory view illustrating a winding condition of the present invention.

[Explanation of symbols]

1. Undrawn yarn 2. Feed roller 3. Heating device 4. Cooling system 5. False twisting device 6. Feed roller 7. Winding fulcrum guide 8. Traverse guide 9. Drive roller 10. package 11. Variable winding width rod 12. Traverse guide 13. Maximum winding width Xa in a fixed cycle 14. Shortest winding width Xb in a fixed cycle 15. Traverse locus 16. Constant cycle to change winding width

Claims (4)

[Claims] 1. A method for winding a winding start-twisting machine of a simultaneous start-stop system while changing the winding width within a fixed cycle, wherein the maximum width (Xa) and the shortest width (Xb) of the winding width within a fixed cycle are used. When the difference is defined as the collapse amount Lx, the collapse amount Lx is gradually increased from the beginning to the end of the winding, and the shape of the trajectory of the change in the traverse width within a certain cycle is similar between shapes within an arbitrary constant cycle. A method for winding a false twist textured yarn, characterized in that 2. The thickness of the winding layer at the beginning of winding the drawn false twisted yarn is K0,
When the thickness of the winding layer at the end of winding is Km, the thickness K0 to the thickness K1 of the arbitrary winding layer and the thickness K2 to Km of the arbitrary winding layer
The method for winding a false twisted yarn according to claim 1, wherein the amount of breakage is constant and the amount of breakage between K1 and K2 is gradually increased. K0 <K1 <K2 <Km 3. The method for winding a false twisted yarn according to claim 2, wherein K1, K2 and Km have the following relationship. Km × 0.10 ≦ K1 ≦ Km × 0.30 Km × 0.50 ≦ K2 ≦ Km × 0.80 4. A maximum winding width Xa of a package within a fixed period,
L1 and L2 are the collapse amounts when the thicknesses K1 and K2 are arbitrary.
The method for winding a false twisted yarn according to claim 2 or 3, wherein L1 and L2 have the following relationship. Xa × 0.02 ≦ L1 <Xa × 0.06 Xa × 0.06 ≦ L2 ≦ Xa × 0.16