JP2000212865A - Production of bulky yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bulky yarn having soft touch feeling free from torque and having good productivity by imparting strength to fine fiber bundle without almost applying twist to fleece of the fine fiber bundle. SOLUTION: Fleece 4 of fiber bundle drafted in fine spinning process for forming yarn from roving and made fine is subjected to false twist by a hollow spindle 14 and a V-shaped guide 16 to afford a yarn and the yarn is led to a small-diameter cylindrical knitting machine and knitted to provide a bulky chain-like yarn 33. As for the yarn, when the yarn is stretched in the longitudinal direction, abrasion resistance arises between non-twist yarns constituting chains and strength of the yarn is generated without causing slip of fiber and non-twist fiber bundle is folded in the longitudinal direction of the yarn to form loops.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a yarn from a roving yarn in a spinning process of a spinning process.

[0002]

2. Description of the Related Art Generally, a roving yarn 1 is drafted by a drafting device 2 and a fleece 4 of a fiber bundle thinner than a front roller 3 as shown in FIG.
The fleece 4 of the fine fiber bundle
Is wound up on the bobbin 8 via the traveler 7. At this time, a thin fiber bundle fleece 4 is twisted by a traveler 7 rotating on a ring 6 to form a strong thread 9 and wound around a bobbin 8.

[0003]

The yarn produced by the above-described method has a high fiber strength because the fibers in the fleece of the thin fiber bundle are given a twisting friction and the yarn is strong. The texture is harder than the fleece of the bundle and torque is generated in the yarn. When the winding bobbin becomes full, the bobbin needs to be replaced each time, and the productivity is low. SUMMARY OF THE INVENTION An object of the present invention is to create a yarn shape that is soft, bulky, torqueless, and has good productivity by imparting strength to the fiber bundle without adding twist to a thin fiber bundle fleece.

[0004]

According to the first aspect of the present invention, a roving yarn is drafted by a drafting device, and a fleece of a fine fiber bundle is false-twisted once to be converged into a thread shape. A small-diameter cylindrical knitting machine is supplied to a knitting needle through a rotating yarn guide, knits a fleece of this fine fiber bundle, creates a chain-like yarn, and then manufactures the yarn while directly winding it on a winder.

According to the first aspect of the present invention, the finished yarn is formed by knitting a substantially non-twisted yarn into a chain-like yarn. When the yarn is pulled, friction occurs between the yarns constituting the chain-like yarn. ,
Since the fiber bundle does not slip and strong strength is generated in the yarn, weaving and knitting in the subsequent process is possible, and the completed chain yarn is soft because it is virtually twisted, and the constituent untwisted yarn is Since it bends to form a loop and is connected to each other in the vertical direction, it becomes a bulky chain-like yarn. The small-diameter cylindrical knitting machine has a configuration in which the yarn end rotates and the needle hook does not rotate, and thus the completed chain-like yarn can be wound directly onto a winder without generating torque, thereby increasing the productivity.

According to a second aspect of the present invention, when the filament yarn is produced by the method of the first aspect, the filament yarn is supplied as a core yarn at a lower speed than the fleece of a fine fiber bundle.

According to the second aspect of the present invention, the fleece of the fine fiber bundle and the filament yarn are simultaneously knitted,
At the same time as increasing the tenacity of the chain yarn, it is possible to feed the fleece of the fine fiber bundle at a speed lower than that of the filament yarn, thereby giving more bulkiness.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS.

The roving yarn 1 wound on the bobbin 10 is stretched by a draft device 2 to form a fleece 4 of a fine fiber bundle, which is spun from a front roller. The configuration is such that the roving yarn 1 guided to the back roller 11, the middle roller 12, and the front roller 3 is drawn out of the bobbin 10 with the rotation of the back roller 11, and the speed of the back roller 11, the middle roller 12, and the front roller 3 is sequentially increased. As a result, the fiber fleece 4 is thinned out and becomes a fiber bundle 4 thinner than the front roller 3.

The fleece 4 of the fine fiber bundle is formed in the hole 1 of the hollow spindle 14 prepared immediately after the front roller 3.
5, once wound around a V-shaped guide 16 for giving false twist to the fleece 4 of the fine fiber bundle, a motor 20, a shaft 21, a pulley 18, a belt 19, a pulley 17.
Causes the hollow spindle 14 to rotate, and V
The rotation of the character guide 16 twists the fleece 4 of the thin fiber bundle and generates tensile strength.

The fleece 4 of the thin fiber bundle that has exited the V-shaped guide 16 is a thread guide 1 attached to a small-diameter cylindrical knitting machine 27.
The yarn guide 13 is guided by the motor 3, and the motor 20 rotates the shaft 21, the pulley 26, the belt 25, the pulley 24, and the guide bar 23 to rotate on a concentric circle with the cylinder 28 of the tubular knitting machine 27. The fleece 4 of the bundle is hooked on the hook 39 of the needle 22.

The fleece 4 of the thin fiber bundle wound around the hook 39 is guided to the pull-out roller 29 through the cylinder 28 of the tubular knitting machine 27, and the needle 22 is connected to the upper and lower cams 31 and 32 attached to the case 35. The needle 22 moves up and down by the rotation of the pulley 24 by rotation of the pulley 24, and the fleece 4 is knitted into a chain-like thread 33.

The knitted chain-like yarn 33 is wound on a winding bobbin 36 by a drum 30 via a draw-out roller 29.

In the above description, one needle 22 is attached to the cylinder 28.
This is an explanation of the case where the needle is fully mounted. In the case of two needles, a chain-like thread as shown in FIG. 8 is formed.

Next, a second embodiment of the present invention will be described. In the first embodiment, the filament yarn 37 is guided to the yarn guide 13 via the delivery roller 34 via the guide roller 38 provided between the front roller 3 and the hollow spindle 14, and the speed of the delivery roller 34 is controlled by the front roller 3. By setting the filament yarn 37 to a speed lower than the speed of the fine fiber bundle fleece 4 by lowering the speed, the fleece 4
In a state in which the fleece and the filament of the fine fiber bundle are knitted together in a state where the fibers are over-fed, a chain-like yarn, FIG.
To manufacture.

In the second embodiment, the strength of the chain yarn is increased, and at the same time, as shown in FIG.
The fleece 4 of a non-twisted thin fiber bundle is over-fed with respect to 7, and the bulkiness is further increased.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a manufacturing apparatus illustrating a method for manufacturing a special yarn according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a false twist portion.

FIG. 3 is an enlarged view of the tubular knitting machine.

FIG. 4 is a sectional view of a single needle of the tubular knitting machine.

FIG. 5 is a cross-sectional view of the two needles of the tubular knitting machine.

FIG. 6 is a cross-sectional view of a manufacturing apparatus for explaining a method of manufacturing a special yarn according to a second embodiment of the present invention.

FIG. 7 shows a finished thread shape with a single needle according to the first embodiment of the present invention.

FIG. 8 shows a finished thread shape with two needles according to the first embodiment of the present invention.

FIG. 9 shows a finished thread shape with a single needle according to the second embodiment of the present invention.

FIG. 10 is a sectional view of a spinning process in a conventional spinning process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof 2 Draft device 4 Fleece of fine fiber bundle 14 Hollow spindle 16 V-shaped guide 22 Needle 27 Tube knitting machine 38 Guide

Claims (2)

[Claims] In the spinning process of spinning, a roving yarn is drafted by a drafting device, and a fleece of a fine fiber bundle spun from a front roller is false-twisted so as to converge into a single thread. A method for producing a bulky yarn, wherein a chain-like yarn is produced by a small-diameter cylindrical knitting machine having 1 to 6 needles. 2. A process according to claim 1, wherein the filament yarn is introduced as a core yarn at a speed lower than the fleece speed of the fine fiber bundle.