JPH0219519A - Production of composite yarn - Google Patents

Abstract

PURPOSE:To obtain a composite yarn having single yarn-like feeling and uniform appearance by feeding plural crude yarns to back rollers to draft the yarn, sending out the drafted yarn at definite intervals from front rollers and uniting, twisting and winding all fleeces. CONSTITUTION:Plurality of crude yarns A and B are fed at definite intervals in parallel from back rollers 1 and drafted through apron rollers 2 so as to become a prescribed thickness between front rollers 3. Then the drafted crude yarn is sent out from the above-mentioned front rollers 3 in such separated state that interval L between opposite inside ends of the both is 1-4mm and then fleeces are put together and twisted within the range of 5-7 twist coefficient (English cotton count) to provide the aimed yarn having high cohesion force and reduced fluff.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing composite yarns for use in various clothing and other products using spinning equipment.

BACKGROUND ART Conventionally, as a method for producing composite yarn using a spinning device, there is a method of simultaneously supplying filaments and staple fiber bundles.
For example, a method in which opened filaments are fed between the front roller and apron of a spinning machine, overlapped with drafted short fiber fleece, heated, and sown
There is also a method (Japanese Unexamined Patent Publication No. 25253/1989) in which long fiber staples and long fiber staples are simultaneously fed and spun.

Problems to be Solved by the Invention However, in the composite of filaments and short fiber bundles, there is a problem that the filaments have high rigidity and the resulting composite yarns are hard and have a hard texture when made into a 1M4 woven fabric. In addition, in the composite double yarn of long fiber staple and long fiber staple,
In order to prevent only a single yarn from being spun when one yarn breaks during spinning, the propagation of twist is stopped intermittently to force the other yarn to break to generate twist strength. Since the yarn is cut when it is weak, and twist fluctuations occur constantly during spinning, the twist of the resulting composite yarn varies greatly in some parts, resulting in changes in texture, texture, and appearance. becomes non-uniform.

The present invention solves the above-mentioned problems, and aims to provide a method for manufacturing a composite yarn that can obtain a composite yarn with a single yarn-like texture and uniform appearance.

Means for Solving the Problems In order to solve the above-mentioned problems, the method for manufacturing composite yarn of the present invention includes feeding a plurality of rovings to the back roller of a spinning device at predetermined intervals, drafting them, and After each fleece is sent out from the roller with a distance of 1 to 4 meters between the opposing inner edges, all the fleeces are heated and rolled to a twist coefficient (English cotton count) in the range of 5 to 7. It is characterized by taking.

In the above method, if the distance between the opposing inner ends of the plurality of fleeces sent out from the front roller is less than 11 m, each fleece sent out from the front roller is first twisted, and the resulting composite yarn has a cross-twisted yarn shape. gone,
The binding force also decreases, making it necessary to glue the warp threads during fiber production, and on the other hand, if the spacing exceeds 4 threads, the fleece will slip through during spinning, resulting in many thread breakages and making spinning difficult. Also, the twist coefficient (K=t
/F1-, t...Number of twists/in, s...English cotton count)
If the value is less than 5, each fleece will be first twisted, and the cohesive force of the composite yarn will be reduced, making it impossible to weave without glue. Weavability during weaving decreases. In addition, if the diameter of the threading part of the Snell wire used during spinning is 411 m1 or more, the propagation of the twist caused by the rotation of the spindle will be improved, and the binding force will also be improved.

Effect With the above-mentioned structure, each of the seven wreaths sent out from the front roller is first twisted to obtain a uniform composite yarn in the form of intertwisted yarns, which can be used as warp yarns without sizing during weaving.

Embodiment The method for producing a composite yarn of the present invention is based on a conventional method for producing a composite yarn of the present invention, which is equipped with a back roller 1, an apron roller 2, a front roller 3, a snell wire 4, a winding wood tube 5, a ring 6, and a traveler 7, as shown in FIG. using spinning equipment. That is, for example, two rovings A.

B is supplied in parallel from the back roller 1 at a predetermined interval, and is drafted to a predetermined thickness between the apron roller 2 and the front roller 3, and then the front roller as shown in FIG. After sending out two fleeces a and b from 3 so that the distance between their opposing inner edges is in the range of 1 to 4 mm, both fleeces a and b
are passed through the Snell wire 4, passed through the traveler 7, and wound onto the winding woodwind 5 while being heated with a twist coefficient in the range of 5 to 7. Figure 3 shows a state in which three rovings are supplied to the spinning device and heated as three fleeces a, b, and c from the front roller 3, and in this case, two adjacent fleeces a
and the distance between the opposing inner ends of b and C is 1 to 411
11 range and send it out.

Next, a specific embodiment of the present invention using the spinning apparatus shown in FIG. 1 will be described.

Example 1 Two cotton rovings A and B (170 gelens/3 yards)
The back roller 1 of the spinning machine shown in FIG.
44 times the draft between the front roller 3 via the apron roller 2, and the spacing between the opposing inner edges of fleeces a and b from the front roller 3 to 1.2 and 3.4.
rva, and each wire was passed through a Snell wire 4 having a four-fin diameter shown in FIG. 4, heated at a twist coefficient of 6, and a 30-count composite yarn Y was wound onto a winding wood tube 5. Using each of the obtained composite yarns Y, a plain weave woven fabric without glue and having a weave density of 100 threads/inch in the warp and 75 threads/inch in the weft was woven. Table 1 shows the results of evaluation of yarn breakage and weavability during spinning of these composite yarns.

As Comparative Example 1, the distance between the opposing inner ends of two fleeces a and b sent out from the front roller 3 was set to 0.0.
A composite yarn was spun under the same conditions as in Example 1 above, except that the length was 5.5 m, and a plain weave was woven. The evaluation results of yarn breakage and weavability in this case are also shown in Table 1.

Table 1 (Note) 1) Spun yarn breakage (400 spindles per hour) 20...
・5 end grooves, Δ...5 to 10, X...10
Main super heavy 2) Weavability: ○...Good, Δ...Slightly poor, X...Poor, 1st
As is clear from the results listed in the table, two fleece a
, b from the front roller 3, when the distance between the inner ends was 1 to 4 IfiI in Example 1, the binding force was increased, the spun yarn breakage was small, the fluff was also small, and the weavability was good. Ta.

Example 2 Two cotton rovings similar to those in Example 1 were used, and two yarns were sent out from the front roller 3 using the spinning device shown in FIG.
A 30-count composite yarn Y was prepared under the same conditions as in Example 1, except that the distance between the opposing inner ends of the fleeces a and b was 2 circles, and the twist coefficient was changed to 5.6.7. I spun it out. Using the obtained composite yarn Y, a plain woven fabric was woven without glue under the same conditions as in Example 1, and the weavability at that time was evaluated. The results are shown in Table 2.

As Comparative Example 2, a composite yarn was spun under the same conditions as in Example 2 except that the twist coefficients were 3.4 and 8. A plain woven fabric was woven using the obtained composite yarn in the same manner as in Example 2, and its weavability was evaluated. The results are also shown in Table 2.

As is clear from the results shown in Table 2, when the twist coefficient was 5 to 7 as in this example, there was little fuzz, and the binding force was large, and the weavability was good. When the twist coefficient of Comparative Example 2 is 3 or 4, the first twist is applied to each fleece. Vibrations occur, and workability during warping of unsealed warp threads is poor.
Weaving performance is poor due to frequent thread breakage during weaving.

Effects of the Invention As described above, in the composite yarn manufacturing method of the present invention, a plurality of roving yarns are supplied to the back roller of a spinning device at predetermined intervals and drafted, and each fleece is opposed from the front roller. After sending the fleece out with the inner ends spaced apart by 1 to 4 cities, the entire fleece is heated and wound up with a twist coefficient in the range of 5 to 7, resulting in less yarn breakage and good spinning quality. The resulting composite system also has high cohesiveness, has little fuzz, can be woven without sizing, and can be used as warp threads, yielding woven fabrics with good appearance and feel.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a spinning device used in a method for manufacturing composite yarn according to an embodiment of the present invention, and Fig. 2 is a diagram showing a state in which two pieces of fleece are sent out from the front roller of the spinning device. Fig. 3 is a schematic front view of the main part showing the state when three pieces of fleece are sent out from the front roller of the spinning device, and Fig. 4 is a schematic plan view of the Snell wire of the spinning device. It is. 1... Back roller, 3... Front roller, 5...
... Winding woodwind, A, B... roving, a, b, c... fleece, Y... composite yarn. Agent Yoshihiro Morimoto Figure 1 Figure 4

Claims (1)

[Claims] 1. A plurality of rovings were supplied to the back roller of the spinning device at predetermined intervals and drafted, and each fleece was sent out from the front roller with the opposing inner ends spaced apart by 1 to 4 mm. Thereafter, the entire fleece is heated and wound to a twist coefficient (English cotton count) in the range of 5 to 7.