JPS63303134A - Production of covering spun yarn - Google Patents

Abstract

PURPOSE:To stably obtain covering spun yarn without end breakage, by removing fly waste attached to the surface of continuous yarn ballooned by rotation of a hollow spindle by a balloon breaker having uneven surface. CONSTITUTION:A balloon breaker 17 having uneven surface is stopped at a position wherein the balloon breaker is brought into contact with continuous yarn 13 to form a ballooning 18 occurring by rotation of a spindle 3 and fly waste attached to the continuous yarn with ballooning of the continuous yarn is removed by the balloon breaker so that the fly waste is prevented from accumulating to become fly waste lump.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing covered spun yarn using a hollow spindle.

More specifically, the present invention relates to a novel covering spinning method that eliminates problems caused by fluff during the spinning process and improves operability and product quality.

[Prior art] Conventionally, short fiber bundles are drafted to form a fleece, the fleece is supplied to a hollow part of a rotating hollow spindle, and a continuous yarn is unwound from a package arranged around the outer periphery of the hollow spindle. A spindle spinning method is known in which a continuous yarn is guided around a hollow spindle and wound around the outside of the fleece.

In this spinning method, there is a phenomenon in which some of the short fibers of the fleece sent out from the draft device are scattered and easily adhere to the yarn ballooning at the tip of the hollow spindle. When the 'El fibers adhere to the balloon in this way, the continuous filament wraps around the tip of the hollow spindle, causing the balloon to collapse, which causes abnormal tension to be generated and the continuous filament to be cut. There was a problem in that this caused a problem in that the operability was significantly reduced.

In addition, even if the continuous thread does not break, if abnormal tension occurs in the continuous thread, the number of windings in the tensioned part may decrease, the part may become thinner, or a lump of fluff may form. This has the disadvantage that it becomes entangled and generates slabs, which significantly deteriorates the quality of the filament.

In order to solve this inconvenience, an obstacle (hereinafter referred to as a balloon breaker) is brought into contact with the balloon to temporarily collapse the balloon, and the flying fluff (scattering) attached to the continuous thread material being ballooned is removed. A method has been taken to remove the short fibers) by winding them into a covering spun yarn.

However, because this balloon breaker usually uses a metal wire with a smooth surface, it has a weak impact resistance to collapse the balloon, and is not able to remove the attached fluff in 1 minute. is the current situation.

[Problems to be Solved by the Invention] The purpose of the present invention is to improve the deficiencies of the above-mentioned conventional methods, and to make the fly fluff adhering to the continuous yarn material being ballooned grow and accumulate into large fluff clumps. By quickly winding up the fluff into the covering spun yarn and removing it each time it occurs, stable operations can be performed without yarn breakage, and covering spun yarn with excellent yarn quality can be produced. The purpose of this invention is to provide a novel covering spinning method.

[Means for Solving the Problems] The covering spinning method of the present invention has the following configuration in order to achieve the above-mentioned object.

That is, a short fiber bundle is drafted to form a fleece, the fleece is guided into the hollow part of a rotating hollow spindle, and the continuous yarn wound around the outer periphery of the hollow spindle is unwound and the hollow part of the hollow spindle is unwound. In the method for manufacturing a covered spun yarn, the continuous yarn is wound around the fleece, wherein the continuous yarn is ballooned by the rotation of the hollow spindle, and the continuous yarn has a substantially uneven surface. This is a method for producing a covered spun yarn, characterized in that fly fluff adhering to the continuous yarn is removed by bringing a breaker into contact with the continuous yarn.

[Function] Hereinafter, the method for producing a covered spun yarn of the present invention will be described in more detail.

A feature of the present invention is that a balloon breaker having a substantially uneven surface is brought into intermittently into contact with a continuous filament that is ballooned by the rotation of a hollow spindle. In the method of the present invention, the ballooning of the continuous yarn is broken by contact with such a balloon breaker, and according to the observations and findings of the present inventors,
Based on the presence of irregularities on the surface of the balloon breaker, minute vibration phenomena and tension fluctuation phenomena are caused in the filament,
This works as an active action to encourage the removal of the fly fluff adhering to the ballooned continuous yarn material, and quickly winds up the fly fluff into the covering spun yarn. This makes it possible to remove the particles by preventing them from growing and depositing.

Of course, according to this method, the fly fluff before it grows large is quickly removed and rolled into the spun yarn, so there is a problem of extreme deterioration of yarn quality due to winding up of large fly fluff. From this point of view, it can be said to be the best.

FIG. 1 is a schematic sectional view schematically showing an example of a covering spinning frame that can be used in carrying out the method of the present invention. As shown in the figure, the covering spinning frame 1 includes a draft mechanism 2, a hollow spindle 3, a delivery roller 4,
The winding mechanism 5 is the main part thereof. A back roller 6 of the draft mechanism 2 is driven by a drive source (not shown).
The roving 7 supplied to the shaft is drafted through an apron 8 and a front roller 9, and is supplied as a fleece 10 from the front roller 9 to a hollow part 11 of a hollow spindle.

The hollow spindle 3 is driven by a belt 12 driven by a drive source (not shown), and on the outer periphery of the hollow spindle is a flanged bobbin 1 in which a continuous thread 13 is a package.
4, and the flanged bobbin 14 is locked to the hollow spindle 3 so as to rotate together with the hollow spindle 3.

The continuous thread material 13 wound around the flanged bobbin 14 is supplied to the hollow part 11 of the hollow spindle 3, and is fed to the front drawer 9.
The outer periphery of the fleece 10 supplied from
The package 16 is wound up through the winding mechanism 5.

The balloon breaker 17 is locked at a position where it comes into contact with the continuous yarn 13 forming the ballooning 18 generated by the rotation of the spindle 3, and as the continuous yarn balloons, the balloon breaker 17 intermittently connects the yarn and the balloon. The structure is such that it makes contact with the breaker.

FIG. 2 is a plan view showing a specific example of the balloon breaker shown in FIG. 1.

In Figure 2, <A) is a rod-shaped body with a thin metal wire wound around it in a spiral shape, (B) is a rod-shaped body with protrusions randomly provided on its surface, and (C) is a rod-shaped body with protrusions randomly wound on its surface. (D> indicates a rod-shaped body with a smooth surface that has been used conventionally, and (A) -
The one shown in (C) is an example of a balloon breaker that can be used in the method of the present invention.

That is, when the balloon breaker made of a rod-shaped body with a circular cross section and a smooth plane as shown in FIG. Although it involves the action of applying an impact to the material 13 to change the shape of the ballooning and temporarily collapse the ballooning, it is not possible to efficiently and satisfactorily remove the fly fluff attached to the continuous yarn material by winding it into the covering spun yarn. On the other hand, the balloon breakers having the shapes shown in FIGS. 2(A) to (C) that can be used in the method of the present invention have substantially uneven surfaces (
As mentioned above, this type of valve is characterized by
By using a balloon breaker, the ballooning collapses, and due to the presence of irregularities on the surface of the balloon breaker, minute vibration phenomena and tension fluctuation phenomena are generated in the continuous thread, which causes the ballooning to collapse. It acts as an active action to encourage the removal of fly fluff adhering to a continuous yarn object, and can efficiently and quickly remove the fly fluff adhering to a continuous yarn object by winding it into the covering spun yarn. I'm here because I can.

FIG. 3 is a front view schematically showing various aspects during covering spinning.

FIG. 3(A) shows a normal ballooning state in a covering spinning machine when no balloon breaker is used.

Figure 3 (B) shows a state in which when the spinning machine is operated without using a balloon breaker, the fluff 22 is caught on the ballooning continuous thread material and the thread material is about to wind around the hollow spindle. shows. In this state, thread breakage is likely to occur.

FIG. 3(C) shows a state in which the balloon is collapsed using a balloon breaker, resulting in an irregular balloon shape.

FIG. 4 is a schematic diagram showing the relationship between the twisting direction of the spiral unevenness and the rotational direction of the hollow spindle, that is, the moving direction of the continuous filament when the balloon breaker of the embodiment shown in FIG. 2(A) is used. It is a diagram.

In addition, in FIG. 4 (A>), a balloon breaker 17 in which a metal wire 20 is spirally wound around a rod-shaped body 19 in the S direction is positioned behind the hollow spindle, and the continuous yarn material 1 is
3 shows a state in which the balloon moves in the direction of arrow 21 while forming a balloon. Figure 4 (B) shows metal! It is the same as FIG. 4(B) except that the winding direction of 20 is set to 7 directions. Both exhibit excellent air volume removal effects, but according to the various findings of the present inventors, when the balloon breaker is constructed so that the inclination of the metal wire 20 and the continuous yarn material 13 passing through it match. has a stronger impact effect on the continuous yarn material,
The micro-imaging phenomenon and micro-tension fluctuation phenomenon excited thereby are also strong, and it seems that the effects of the present invention can be obtained even more highly.

On the other hand, the occurrence of fluff is more likely to occur as the spinning speed is higher or the entanglement of the fibers that make up the sliver used is lower (thicker, shorter, and with less shrinkage). ) shows a tendency to increase. If the occurrence of fluff increases, troubles during spinning will increase. Therefore, unless a highly efficient balloon breaker is used, stable operation will not be possible.

[Example] A sliver obtained by blending 50% by weight of 40-denier 30IrIIr1 staples of polybutylene terephthalate and 50% by weight of 3-denier 20m staples of polyethylene terephthalate was used as the short fiber, while a continuous yarn material 28 made of polyvinyl alcohol fiber as
A multifilament yarn with a denier of 9 filaments was used.

The covering spinning machine shown in Figure 1 produces a spinning count of 16.
The hollow spindle rotation speed was set to 8.S, so that the twist number was 600 T/m. OOOrpm and 1°20Orpm,
Covering spinning was performed using balloon breakers (A> and (D>) shown in FIG. 2, and the state of yarn breakage and the number of slabs were investigated.

The results obtained are shown in Table 1.

As is clear from the results in Table 1, in the present invention, the balloon breaker with an uneven surface exhibits superior values in both the number of thread breaks and the number of slabs compared to the comparative example.

Note that 12. in the comparative example. OOOrpm is at a level that is considered impossible to produce in industry.

On the other hand, the method according to the present invention has shown significant progress in terms of yarn quality and operability, especially in 12. OOO rpm operation is also possible and productivity can be improved.

[Effects of the Invention] By having the above-described configuration, the present invention achieves the following excellent effects.

(1) According to the present invention, fly fluff does not grow and accumulate, is quickly rolled into the covering spun yarn, and is efficiently removed, resulting in less yarn breakage and significantly improved operability.

(2) Since there is less inclusion of large fluff, slubs are less likely to occur and yarn quality is improved.

(3) Since yarn breakage is small and the quality is high, it is possible to increase the speed, and productivity can be improved from this point as well.

[Brief explanation of drawings]

FIG. 1 is a sectional view schematically showing an example of a covering spinning machine used in the present invention. FIG. 2 is a plan view showing a specific example of the balloon breaker shown in FIG. 1. FIG. 3 is a schematic diagram schematically showing various states during covering spinning. FIG. 4 shows the twisting direction of the spiral unevenness when the balloon breaker of the embodiment shown in FIG. 2 (A>) is used;
FIG. 3 is a schematic diagram showing the relationship between the rotating direction of the spandles, that is, the moving direction of the continuous yarn material. 1: Covering spinning machine 2 Draft mechanism 3: Hollow spindle 4: Delivery roller 5: Winding mechanism
6: Bank roller 7: Roving 8: Apron 9: Front roller 10: Fleece 11: Hollow part of hollow spindle 12: Belt 13: Continuous yarn 14: Flammed bobbin 15: Covering spun yarn 16: Package
17: Balloon breaker 18: Ballooning 1
9: Rod-shaped body 20: Metal wire 21: Arrow indicating the direction of movement of the continuous filament 22: Wind cotton

Claims (1)

[Claims] (1) Draft a short fiber bundle to form a fleece, guide the fleece into the hollow part of a rotating hollow spindle, and unwind the continuous yarn wound around the outer periphery of the hollow spindle. In the method for manufacturing a covered spun yarn, the continuous yarn is guided to a portion and wound around the fleece, wherein the continuous yarn is ballooned by the rotation of the hollow spindle, and the continuous yarn has substantially irregularities on the surface. A method for producing covered spun yarn, which comprises bringing a balloon breaker into contact with the continuous yarn to remove fluff adhering to the continuous yarn.