JPS58104226A - Production of fancy yarn - Google Patents

Abstract

PURPOSE:A bundle of short-cut fibers with false-twisting snarls is covered with a covering yarn to produce fancy yarns with a great variety of yarn forms. CONSTITUTION:The bundle of short-cut fibers 2 from the front rollers 1, 1' in the spinning frame is fed to the rotary hollow spindle 3 at a overfeed of 40-130%. False-twisting snarls are formed on the bundle between the front rollers 1, 1' and the spindle 3 and the bundle 2 is covered with the covering yarn 5. The lengths L1, L2 at the snarl covering part A1, A2 become longer as the overfeed rate becomes larger, on the contrary, the pitch B between the snarl covering parts becomes shorter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing fancy yarn by complex processing.

Conventionally, as a method for manufacturing fancy yarn by composite processing, a method of spinning spun yarn or filament yarn into short fiber bundles has been disclosed in Japanese Patent Publication No. 47-38016. This method has the disadvantage that only a composite yarn with little change in yarn form can be obtained by simply winding yarn or spun yarn.

The present invention solves the drawbacks of such conventional methods and provides a simple method for producing fancy yarn having a wide variety of yarn forms. When producing fancy yarn by covering a covering yarn short fiber bundle unwound from a bobbin mounted on the hollow spindle by supplying it from a roller to a rotating hollow spindle, the short fiber bundle is fed by the front roller of a spinning machine. A false twist snarl is generated in the short fiber bundle between the rotating hollow spindle and the spinning frame 70/troller by the rotational force of the rotating hollow spindle as an overfeed of 40 to 130 degrees, and the short fiber bundle is twisted with the covering yarn. The manufacturing method of Fancy Yare 7 is characterized by covering together with twisted snarl.

The present invention will be described in detail below with reference to the drawings. Figure 111 is a partially longitudinal side view showing an example of an apparatus used for carrying out the present invention, and in the same figure, the 70 controller (1) of a spinning machine (
1') The spun short fiber bundle (2) is given a false twist by the rotation of the rotating hollow spindle (3), and at the same time is untwisted from the bobbin (4) attached to the rotating hollow spindle (3). The covering yarn (5) is covered by K and is guided into the hollow spindle and passed through the take-up roller (5).
6) It is pulled by (6') and wound up by a winding roller (7)K.

In this process, the spinning machine front roller (1) (1'
) and the take-up roller (6X6'), the false twist between the tip of the low hollow spindle (3) and the spinning machine Frondronilla (1) (1') develops, and the amount corresponds to the overfeed amount. After the false-twisted snarl is generated by the traveling short fiber bundle (2) K, the short fiber bundle in which the false-twisted snarl is generated by the covering yarn (5) released from the bobbin (4) attached to the hollow spindle (3). After covering (2) with false twisted snarl.

Inside the rotating hollow spindle (3), take-up roller (6) (6
') and is wound up by a winding roller (7) to complete the process.

In this case, if the overfeed rate of short fiber bundles by the front roller of the spinning machine is less than 40%, the length of the false twisted snarls that appear will be short, and the snarls will stand upright from between the pitches of the covering yarn (5) after covering. However, by setting the overfeed rate to 40% or more, the false-twisted snarls become long (9), so that the generated false-twisted snarls can be covered with the covering yarn (5) together with the short fiber bundle. The upper limit of the overfeed rate was 180% in terms of shape after various studies were performed up to 180 inches.
Although it is possible at an overfeed rate of 130%
If the overfeed rate exceeds 40, the occurrence of false twist snarls will be low, and the probability of causing slack in the short fiber bundle (2) and the trouble of yarn breakage will be high. It is necessary that it is 130% or less.

Figure 2 shows a side view of the yarn obtained by the present invention, showing the snarl covering part (A) of the staple fiber bundle (2).
l) - (A length Ll), (LD is spinning machine 70 controller (1) (1') and take-up roller (6) (6')
The overfeed rate is regulated by the overfeed rate.

The pitch (B) between the snarl covering parts becomes shorter due to the reverse pressure.

In addition, the spinning machine front roller (1) in the manufacturing method of the present invention
) (1') and the rotating hollow spindle (3) is preferably less than twice the length of the longest single fiber in the short fiber bundle from the point of view of process stability, to more reliably stabilize the snarl covering form. Therefore, it is desirable to set K to a distance of 1 times or less. Further, in order to fix the temporary combustion snarl, it is also possible to introduce another fixing thread onto the hollow spindle.

According to the method of the present invention as described above, fancy yarns having unevenness with a clear transition difference between thick and thin portions can be stably produced without using special low-productivity machines such as design twisting yarns. It has a remarkable industrial effect in that it can be produced efficiently.

Example 1 Acrylic fiber 8d×152×100 was prepared using the apparatus shown in Fig. 1.
2000 or
Polyester multifilament 15 wound on a bobbin mounted on a hollow spindle rotating at a rotational speed of pm
0d/30f Pick-up speed 90 while covering K ψ
When taken at m/min, the length between the steel covers was 7.
A slubby fancy yarn having a range of 5 to 210 dragons was obtained.

Example 2 Acrylic fibers 8 dX 152 10 d
4 17m sliver consisting of 0% 'Y 15x after drafting 200Or with an overfeed rate of 120Is
Polyester multifilamen wound around a bobbin mounted on a hollow spindle rotating at a rotational speed of pm)
Take-up speed 60 while covering with 150d/30f
When taken at m/min, the length of the snarl covering part was 17 to 32 mm, and the length between the steel coverings was 15 to 4.
A slubby fancy yarn with a range of 0 m was obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view showing an example of a device used to carry out the present invention i, and FIG. 2 is a side view showing an example of fancy yarn obtained by the present invention. In Figures 1 and 2, (1) and (1') are spinning machine 70 controllers, (2) are short fiber bundles, (3) are rotating hollow spindles, (4) are bobbins, and (5) are covering yarns. , (6) (6') is the take-up roller, (7) is the take-up roller, (AI), (AI) is the snarl covering part. (B), is the pitch part between steel coverings = (Ll
)(Lt) is the Snarl covering length.

Claims (1)

[Claims] A short fiber bundle is supplied from the front roller of a spinning machine to a rotating hollow spindle, and the short fiber bundle is unwound from a bobbin mounted on the hollow spindle for two rotations, and the short fiber bundle is covered to form a fancy yarn. When manufacturing, the short fiber bundle is supplied by the spinning machine 70 controller with an overfeed of 40 to 130 degrees and the rotational force of the rotating hollow spindle is applied (therefore, the short fiber bundle is false twisted at the threshold between the rotating hollow spindle and the spinning machine 70 controller) Generate a snarl. A fancy yarn technique characterized by covering short fiber bundles together with false-twisted snarls using covering yarn.