JPH0592870A - Cone shape package for spun yarn - Google Patents

Abstract

PURPOSE:To provide a core-shape package nearly constant in release tension during high speed release in either large or small case of the package diameter and almost free from the generation of latching and sloughing. CONSTITUTION:In a package 4 wound with spun yarn into a core shape, the tapered angle of one yarn around the folded point 1 of yarn 5 at the large diameter side end face of the package 4 is made smaller than that of the other yarn, and the yarn is wound more tightly in the vicinity (F) of the large diameter part than in the vicinity (E) of the small diameter part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package in which yarn is wound in a cone shape. More specifically, it relates to a cone-shaped package that can be unrolled at high speed.

[0002]

2. Description of the Related Art With the recent increase in the speed of loom and warper, the packages used in these machines are designed to reduce the yarn breakage due to the occurrence of latching and sluffing by 12 ° or 10 °. It was wound at an average twill angle. However, a recent ultra-high-speed loom, for example, an air jet loom with a weft unwinding speed of 1500 m / min has been developed and put into practical use. If a package wound at a conventional average twill angle of 12 ° or 10 ° (hereinafter referred to as a conventional package) is used as the weft yarn package of these ultra high-speed loom, the yarn diameter becomes smaller as the package diameter becomes smaller. Since the unwinding tension increases, the length measurement roller changes the length measurement amount depending on whether the package warp is large or small and the yarn length is not uniform. In other words, if the package diameter is smaller than when it is large, the length measurement amount will be short, so the amount of waste will be set to a large amount, which will increase the economic loss and will also stop sideways such as show topics. Increase. Further, the increase in unwinding tension increases the number of yarn breakage stops, lowering productivity and lowering product quality. In addition, the conventional package has problems that the number of stops increases due to yarn breakage due to frequent occurrence of latching and sluffing, and productivity is lowered and product quality is lowered. In recent high-speed warping machines, machines with a winding speed of 1000 m / min have been put into practical use. When conventional packages are used for these warping machines, the warp of the package becomes small during rewinding. Accordingly, the unwinding tension is increased, the winding tensions of the outer layer yarn and the inner layer yarn wound around the warp beam are different, and the yarn length of three warp beams is wound around one package. If it is assumed that the tension of the yarn in the first warp beam and the tension of the yarn in the third warp beam are different, that is, the winding of the yarn in the warp beam and for each warp beam is different. The tension is different. When this warping beam is glued with a gluing machine, there are problems such as warp yarn breakage and poor opening at high speed opening because the amount of thread glued in the warping beam and for each warping beam is different.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned various problems, and the unwinding tension at the time of high-speed unwinding is substantially constant even when the warp of the package is large or small, and the latching and the sluffing are performed. The purpose of the present invention is to provide a cone-shaped package in which the occurrence of

[0004]

SUMMARY OF THE INVENTION The present invention relates to a package in which spun yarn is wound in a cone shape, and the yarn traverse angle of one of the yarns before and after the turning point of the yarn on the large diameter side end face of the package is set to the other. The above-mentioned various problems have been solved by a cone-shaped package of spun yarn, which is characterized in that it is made smaller than the traverse angle of the yarn and that the vicinity of the large diameter portion is wound more tightly than the vicinity of the small diameter portion.

That is, according to the present invention, one of the yarns having a length of 160 mm before and after the turning point of the yarn on the end surface of the large diameter side of the package has a traverse angle in the range of 5 ° 30 'to 8 °. The average traverse angle of the thread wound from the turnaround point of the thread on the small diameter side end surface of the package to the turnaround point of the thread on the large diameter side end surface and the thread from the turnaround point of the large diameter side end surface to the small diameter side end surface The difference from the average traverse angle of the yarn wound up to the turning point of 3 is in the range of 3 ° to 7 ° 30 ', and in the vicinity of the large diameter portion of 50 mm from the large diameter side end surface of the package toward the small diameter side. The average winding hardness is smaller than the end face on the small diameter side.
From the average winding hardness near the small diameter part for 50 mm toward the large diameter side,
A cone-shaped package of spun yarn, characterized in that it is wound tightly in the range of 9 ° to 14 ° and wound so as not to become harder than 75 ° or more. The traverse angle of 5 ° 30 ′ to 8 ° specified by the present invention is the turning point (1) of the thread on the end face on the large diameter side shown in FIG. 1 and the thread length of 160 mm from this turning point (1).
Is an angle (θ) formed by a line (A) passing through the point (2) and a line (B) perpendicular to the longitudinal direction of the bobbin (3).

The average traverse angle of the present invention means the winding width L of the package, the package diameter D at the position (G) where the winding width L is divided into two, and the yarn reaches from one end of the winding width L to the other end. It can be obtained by the following equation from the values obtained by measuring the number of windings P up to that time.

[0007]

[Formula 1]

Because, in the present invention, since the package has a cone shape, the twill of the wound yarn becomes a curve, and when the twill angle is obtained, it can be obtained only by an average value between specific values.

The average winding hardness of the present invention means that a specific interval of 50 mm is 5
It is the average value measured at mm intervals. The above-mentioned winding hardness is a value indicated by a pointer by pressing a measuring portion of a rubber hardness meter defined by Japanese Industrial Standards (JISK6301) against the side surface of the package.

[0010]

In the present invention, by reducing only the traverse angle of either the front or rear of the turning point of the end face on the large diameter side, the traverse angle of the yarn in the same portion of the conventional package can be made much smaller. Due to this small traverse angle, the unwinding tension at the time of high-speed unwinding is almost constant even when the package diameter is large or small, and the occurrence of latching and sluffing near the large diameter portion can be prevented.

With such a function, when the traverse angle becomes smaller, the winding density becomes denser and the winding hardness becomes larger. Therefore, when the outer layer of the package is tightened, the lower layer yarn of the inner layer floats up and the entanglement with the upper layer yarn occurs. Therefore, it is considered that the unwinding tension hardly increases even when the package diameter becomes small during unwinding.

Further, the yarn with a small traverse angle is tightly wound toward the inner layer of the package as compared with the yarn with a large traverse angle, and tends to be unwound from the large diameter side to the small diameter side. It is considered that since the unwinding force is large, the unwinding resistance of the yarn becomes large, and the twill is not disturbed even if fluffing, yarn entanglement, etc. occur, which does not lead to latching or sluffing.

The most desirable traverse angle of either one of the yarns having a length of 160 mm before and after the turning point of the yarn on the large-diameter side end surface of the package varies depending on the yarn type and the number, but is usually 5
30 ° to 8 ° is desirable.

In detail, in the case of cotton yarn, Ne (UK count) 20 to Ne40 is 7 ° 30 ', Ne41 to Ne16.
0 is most preferably 6 ° 20 ', and Ne160 or more is most preferably 5 ° 40'. The most preferred values for other types of spun yarn are also close to those for cotton wool.

Further, the average traverse angle of the thread wound from the turnaround point of the thread on the small diameter side end face of the package to the turnaround point of the thread on the large diameter side end face, and from the turnaround point of the thread on the large diameter side end face to the small diameter side end face. The difference from the average traverse angle of the thread wound up to the turning point of the thread is 3 ° ~
A range of 7 ° 30 'is desirable.

In detail, in the case of cotton yarn, Ne20 to Ne
40 is 4 ° 40 ', Ne41 to Ne160 are 3 ° 10',
Most preferably, Ne of 160 or more is 7 ° 10 '. The most preferred values for other types of spun yarn are also close to those for cotton wool.

The package of the present invention is not limited to the use of woven weft yarns, but can be applied to various uses such as woven warp yarns and knitting machines.

The package of the present invention has an unwinding speed of 1 / min.
The effect becomes remarkable when the length is 200 m or more.

[0019]

EXAMPLES The present invention will be described below with reference to examples.

Polyester / cotton blended yarn Ne45 1 per minute
5 ° 5 with a maximum diameter of 285 mm at a winding tension of 20 g
The package was wound on a 7'cone and the unwinding test was performed on these packages at an unwinding speed of 1500 m / min and an unwinding distance of 400 mm. As a result, the number of yarn breakages of the package of the present invention was 0, which is a very good result as compared with other comparative examples. Met. The characteristics of the package used in this test are shown in Table 1, the winding tension values for each package diameter during the test are shown in Table 2, and the test results are shown in Table 3.

[0021]

[Table 1]

A: The traverse angle of the thread (5) having a length of 160 mm before and after the turning point (1) of the thread on the end surface of the large diameter side B: Large from the turning point of the thread on the end surface of the small diameter side of the package (4) From the mean traverse angle of the yarn (5) wound up to the turning point (1) of the thread (5) on the radial end surface and the turning point (1) of the thread (5) on the large diameter end surface, Difference from the average traverse angle of the thread (5) wound up to the turning point of 5) C: Average winding around the large diameter portion (F) of 50 mm from the end surface of the large diameter side of the package (4) toward the small diameter side. Difference obtained by subtracting the average winding hardness in the vicinity of the small diameter part (E) for 50 mm from the end surface on the smaller diameter side to the larger diameter side than the hardness

[0023]

[Table 2]

D: Package diameter measured during unwinding (m
m) Note) In Comparative Example (2), it is impossible to rewind due to yarn breakage due to frequent sluffing and latching when the package outer diameter is 88 mm.

[0025]

[Table 3]

E: Maximum tension during unwinding F: Minimum tension during unwinding G: Difference between maximum tension and minimum tension during unwinding H: Number of yarn breakages due to latching and sluffing during unwinding I: Overall evaluation

[0027]

The package of the present invention, when unwinding at high speed,
Whether the package diameter is large or small, the unwinding tension is almost constant, so high-productivity and high-quality products can be obtained in the subsequent process, and there is almost no yarn breakage due to latching or sluffing. Productivity and quality products are obtained.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a form of a cone-shaped package according to the present invention.

[Explanation of symbols]

 1 The turning point of the thread on the end surface of the large diameter side 2 The point 160 mm from the turning point of the end surface of the large diameter side 3 Winding bobbin 4 Package 5 Straight line passing through threads A 1 and 2 B The line perpendicular to the longitudinal direction of bobbin 3 θ Angle between straight line A and straight line E Near small diameter area F Near large diameter area G Length of winding width L divided into two parts L Winding width L

Claims (1)

[Claims] 1. A cone-shaped package of spun yarn, comprising:
The turning point of the thread on the end of the large diameter side Length before or after either 16
A 0 mm thread is wound at a traverse angle in the range of 5 ° 30 'to 8 °, and the average traverse angle of the yarn wound from the turning point of the thread on the small diameter side end surface to the turning point of the thread on the large diameter side end surface is large. There is a difference of 3 ° to 7 ° 30 'from the average traverse angle of the thread wound from the turnaround point of the thread on the diameter side end face to the turnaround point of the thread on the small diameter side end face, and it is directed toward the smaller diameter side from the large diameter side end face. The average winding hardness in the vicinity of the large diameter portion of 50 mm is tightly wound in the range of 9 ° to 14 ° from the average winding hardness in the vicinity of the small diameter portion of 50 mm toward the large diameter side from the end surface of the small diameter side. A cone-shaped package of spun yarn that is wound so that it does not become harder than ゜.