JP2001089945A - Method for producing core yarn and apparatus for producing core yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always and stably secure a state in which a stretchable filament yarn to be a core is situated in the center and completely covered with external layer fibers. SOLUTION: Drafted rovings 30A and 30B are twisted and taken up in a parallel state through a collector 16 by front rollers 12-1 and 12-2. A core yarn 34 is mixed through a snail wireshaped guide member 40 from the back side of the front rolleers 12-1 and 12-2 in the rovings 30A and 30B. Since the guide member 40 is fixed on the collector 16, the guide member 40 follows to the collector 16 even when slightly swung on right and left and the supply of the core yarn 34 to the center of the roving 30A and 30B is kept. The state in which the core yarn 34 is completely surrounded with the external layer fibers can always be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a core yarn comprising a core made of a stretchy synthetic filament yarn such as spandex covered with an outer layer fiber such as wool fiber or cotton fiber. is there.

[0002]

2. Description of the Related Art A core yarn comprising a stretchable filament yarn such as spandex as a core and a natural fiber such as wool or cotton as an outer layer is intended to produce a yarn having both the stretchability of spandex and the softness of natural fibers. . In order to manufacture such a core yarn, in a spinning process, a spandex filament is combined with a roving (roving) in a draft at an inlet of a front roller, and twisted and wound. That is, in a normal spinning machine, there is provided a collector for guiding the drafted roving yarn to the front roller at the inlet side of the front roller, and the stretchable filament yarn is mixed with the roving yarn by being supplied to the front roller at the collector. It has become so.

[0003]

However, according to the simple technique of mixing the stretchable filament yarn serving as the core with the roving yarn in the draft at the site of the collector as in the prior art, the stretchable filament yarn serving as the core cannot be used. It has been difficult to stably obtain a core yarn of the intended structure completely covered by hair or cotton fibers as the outer layer. That is, as shown in FIG. 1A, it is necessary that the core (stretchable filament yarn) is located at the center and is completely covered by the outer layer fiber. However, the conventional method does not have a positive means for controlling the stretchable filament yarn serving as the core so that it always comes to the center of the outer layer fiber. For this reason, since the filament yarn is supplied off center, the core fiber may frequently appear in the outer layer as shown in FIG. Such a core yarn becomes a defect in a post-process, and is likely to cause complaints and returns from users. In other words, since the core fiber is exposed to the outer layer, only that portion is visible at the stage of knitting or weaving, which can be a defect of a knitted fabric or a woven fabric. It can be.

The present invention has been made in view of the above-described problems of the prior art, and always and stably maintains a state in which a stretchable filament yarn serving as a core is located at the center and is completely covered by an outer layer fiber. The purpose is to be able to secure.

[0005]

According to the first aspect of the present invention, while supplying the roving as the outer layer fiber to the draft part of the spinning machine, the filament fiber is combined with the roving from the entrance of the front roller in the draft part. In the method for producing a core yarn in which the filament fiber as the core is covered by the outer layer fiber by supplying the raw fiber, a plurality of roving yarns are supplied to the draft part in parallel with the supply of the filament fiber. Providing a filament yarn guiding as always performed at an intermediate position between a plurality of roving yarns in a draft.

According to the operation of the first invention, a plurality of roving yarns are supplied in parallel to the draft part, and a filament fiber serving as a core is always supplied to an intermediate position between the plurality of roving yarns supplied in parallel. I will guide you. Therefore, there is an effect that a state in which the core filament fiber is completely covered at the center of the outer layer fiber can be constantly and stably obtained. Therefore, the filament fibers serving as the core do not appear in the outer layer, and the occurrence of knitting or weaving defects and spots in the subsequent steps can be almost completely suppressed.

According to the second aspect of the present invention, the draft part for drafting the roving yarn as the outer layer fiber and the inlet of the front roller in the draft part are provided, and the roving yarn in the draft converges toward the front roller. · Consisting of a collector for guiding, supply means for supplying filament fibers from the entrance of the front roller in the draft part so as to be combined with roving in the draft, and twisting and winding means for fibers from the front roller. In the core yarn manufacturing apparatus, the collector has a groove width in which a plurality of roving yarns can be supplied to the front roller while maintaining a parallel state thereof,
Further, there is provided a core yarn manufacturing apparatus, wherein a guide member for guiding the filament fibers from the supply means to a front roller to be supplied to an intermediate position between a plurality of rovings is attached to a collector.

According to the operation of the second invention, the plurality of roving yarns in the draft are twisted and wound by the front roller while maintaining the parallel state in the collector. A guide member for guiding the core filament fibers is attached to the collector. Therefore, even if there is a movement of the collector (sway to the left and right), the guide member always moves integrally therewith, so that the positional relationship of the filament fibers at the intermediate position between the plurality of rovings is always maintained. Therefore, it is possible to constantly and stably obtain a state in which the core filament fiber is completely covered in the center of the outer layer fiber.
In the second aspect, the configuration as a solution is a very simple configuration in which the guide member is fixed to the collector, and has the effect of achieving the intended purpose at low cost.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention in a draft part of a spinning machine in carding spinning will be described below. In FIG. 2, the draft part of the spinning machine includes a back roller pair 10, a front roller pair 12, and an apron pair 14. The back roller pair 10 includes a bottom roller 10-1 and a top roller 10-2, the front roller pair 12 includes a bottom roller 12-1 and a top roller 12-2, and the apron pair 14 includes a bottom apron 14-1. Top apron 14-2. Front bottom roller 12-1
A collector 16 is provided in the vicinity of the front roller pair 12, and the collector 16 functions as a guide for guiding the roving yarn being drafted to the front roller pair 12. As is well known, the collector 16 is pivotally attached to a wire-like holder 18 (see FIG. 4) extending toward the front roller pair 12 from the tip of a cradle (not shown) serving as a frame of the bottom apron 14-1.

The number of rotations of the front roller pair 12 with respect to the number of rotations of the back roller pair 10 is a predetermined ratio (draft ratio), and the roving from the back roller pair 10 to the front roller pair 12 is drafted. The thinned roving yarn is sent out from the front roller pair 12 and travels from the snail wire 20 through the traveler 22 to the paper tube 24 on the spindle.
It is wound while being twisted to form a cup 26.

A creel (not shown) is provided with a roving bobbin. As shown in FIG.
It is provided two by two as in 8B. Roving bobbin 28 for each weight
A little twisted roving (shino) 30A, 30B unwound from A, 28B is supplied in parallel to the drafting device. Therefore, the back roller pair 10 and the front roller pair 1
A draft of a predetermined ratio is received while maintaining a parallel state between the two. During drafting, the rovings 30A, 30B are sandwiched between the upper and lower apron pairs 14, the floating fibers are controlled, and receive a uniform draft. The rovings 30A, 30B pass through the guide grooves 16-1 of the collector 16 (FIG. 4). The rollers are supplied to the front roller pair 12 while maintaining a parallel state. In other words,
The guide groove 16-1 of the collector 16 (FIG. 4) has a width capable of supplying the rovings 30A and 30B in a substantially separated state in parallel.

The rovings 30A, 3 coming out of the front roller pair 12
OB is initially individually twisted by the rotation of the spindle, but converges in a tapered shape, eventually becoming one thread. In this method, two roving yarns are supplied in parallel for each spindle, and after drafting, they are converged to one yarn by twisting.
Commonwealth Scientific Industrial Research Organi
sation (CSIRO) is a patent based silospan (CSIROSPUN) based on a patent and has the same count and number of twists as compared to a normal roving-drafted and twisted one. It is said that there is an advantage that the abrasion resistance is higher and the fuzz is suppressed below.

According to the present invention, in the above-mentioned silospan method, a synthetic fiber stretchable filament (such as spandex) serving as a core (core) yarn is introduced at an intermediate position between the parallel roving yarns 30A and 30B during drafting. By controlling the supply of the core yarn so that the supply state of the core yarn to the intermediate position between 30B does not collapse, the position of the core yarn in the middle of the outer layer fiber is always secured. Next, the supply of the core yarn will be described. A core yarn made of a synthetic fiber stretchable filament such as spandex is wound around the bobbin 32 (FIG. 2) of the core yarn, and the core yarn 34 fed from the bobbin 32 is wound. Is the supply roller 36 and the guide roller 3
8 and mixed with the roving yarn at the front roller pair 12 via the snare wire-shaped guide member 40. The core yarn 34 is pulled at a constant draft ratio of, for example, 1.5, and the core yarn 34 is roasted under a predetermined tension.
0B.

As shown in FIG. 4, the guide member 40 is attached to the collector 16 (the guide member 40 is shown in FIG. 2).
See also). That is, the guide member 40 has a snail wire shape as shown in the figure, but its lower end is inserted into a hole formed in the collector 16 and fixed by an adhesive or the like.

During the spinning process, the fibers in the draft region (the region between the back roller pair 10 and the front roller pair 12) receive the draft while guiding the front roller pair 12 while being guided by the groove 16-1 of the collector 16. It is wound while being twisted into a yarn tube. The collector 16 is simply inserted freely into the tip of a wire-like holder 18 extending from the cradle of the lower apron. For this reason, during the manufacturing process, the position of the collector 16 is not exactly determined and constantly delicately swings right and left due to the influence of machine vibration and yarn vibration during the manufacturing process. Thus, the core yarn 34 from the guide roller 38 (attached to the frame of the spinning machine).
If the core yarn 34 is mixed with the roving yarns 30A, 30B from the collector 16 as it is, the position of the collector 16 is constantly delicately oscillated. Direction is indicated by an arrow F in FIG. 4), and the core yarn 3
4 cannot always be supplied, and the supply position of the core yarn 34 to the roving yarns 30A and 30B deviates from the center to the end, so that the end position in the cross section of the twisted and wound yarn occupies the core yarn. Become. The distribution of the core yarn in the twisted and wound yarn in this case is shown in (b) of FIG. 1, and the core yarn is in a state of coming out to the outer layer. At the portion where the core yarn has come to the outer layer, the yarn has a shiny appearance, and the possibility of surface defects after weaving or dyeing increases.

On the other hand, in the present invention, a snail wire-shaped guide member 40 for finally guiding the core yarn 34 is directly attached to the collector 16. Therefore, even if the collector 16 moves left and right as shown by the arrow F, the guide member 40 also moves in the direction of the arrow F in synchronization with this movement of the collector 16. Therefore, the roving 30A guided by the collector 16,
The position where the core yarn 34 joins the 30B is the collector 16
Is always the center between the rovings 30A, 30B regardless of the left and right runout F. Therefore, as shown in FIG.
The core yarn always occupies the position of the center end in the cross section of the wound yarn. On the outlet side, twists are gradually added to the rovings (worsted yarns) on both sides as shown in FIG. Therefore, the core yarn occupies the core (middle) of the outer layer yarn (worsted yarn), does not appear on the surface layer, and does not appear as a weaving defect or a coloring defect. Therefore, it is possible to produce a highly marketable yarn as a core yarn.

[Brief description of the drawings]

FIG. 1 shows a sectional structure of a core yarn according to the present invention (a).
FIG. 7 is a cross-sectional view showing a comparison between the present invention and a conventional technique (b).

FIG. 2 is a schematic side view of a spinning apparatus according to the present invention.

FIG. 3 is a schematic plan view of a spinning apparatus according to the present invention.

FIG. 4 is a schematic perspective view from the back of a front roller in the spinning machine of the present invention.

FIG. 5 is a schematic perspective view from the front of a front roller in the spinning machine of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Back roller pair 12 ... Front roller pair 14 ... Apron pair 16 ... Collector 16-1 ... Guide groove 20 ... Snail wire 22 ... Traveler 24 ... Paper tube 26 ... Cup 28A, 28B ... Roving bobbin 30A, 30B ... Roving yarn (Shino) 32 ... core thread bobbin 34 ... core thread 36 ... supply roller 40 ... guide member

Claims (2)

[Claims] 1. A filament fiber as a core is supplied to a draft part of a spinning machine while a filament fiber is supplied from a front roller in the draft part so as to be combined with the roving yarn. In the method for producing a core yarn covered by the above, the supply of the roving to the draft part is performed in parallel, and the supply of the filament fiber is always performed at an intermediate position between the plurality of rovings in the draft. A method for producing a core yarn, comprising guiding filament fibers as performed. 2. A draft part for drafting a roving yarn serving as an outer layer fiber, a collector provided at an entrance of a front roller in the draft part, for converging and guiding the roving yarn toward the front roller, and a filament. In a core yarn manufacturing apparatus comprising a supply means for supplying fibers so as to be combined with a roving in a draft from a front roller in a draft part, and a twisting and winding means for fibers from a front roller, the collector has a roving yarn. The plurality of filaments have a groove width that can be supplied to the front roller while maintaining the parallel state, and guide the filament fibers from the supply means to the front roller to supply the filament fibers to an intermediate position between the plurality of rovings. A core yarn manufacturing device, wherein a guide member is attached to a collector.