JPS5881642A - Production of slub yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a slub yarn, and more particularly to a method for producing a slub yarn in which a slub portion is prominently exposed with respect to a core yarn, and the portion where the slub portion is generated is random with respect to the core yarn.

Yarns are known in which bulkiness is imparted by overfeeding and winding a second yarn around a running yarn. This thread is processed with a fluid turbulence nozzle that supplies the running main thread, which can also be called the core thread, with a second thread in an aligned manner and entangles it, giving it bulkiness. However, if you look at the state where the second thread is entangled with the first thread, the bulky part due to the second thread being entangled is not clearly separated from other parts, and the bulk becomes smaller in the part where it is. It is bulky in some parts and its boundaries are unclear.

In view of this point, the method of the present invention uses a fluid turbulence nozzle so that the slab portion and other portions can be clearly and randomly exposed when making the slab yarn. be.

An example of an apparatus for carrying out the method according to the invention for producing a slub yarn 20 with a slub section 21 will now be described with reference to the drawings.

Reference numeral 1 denotes a fluid turbulent flow nozzle, which has a yarn passageway and a fluid jetting nozzle intersecting the yarn passageway inside, and jets pressurized gas jetted from the fluid jetting nozzle to the yarn that has entered the yarn passageway. This causes entanglement of threads. A pair of take-out rolls 2 are placed on the yarn outlet side of the fluid turbulence nozzle 1, and a rotating drum 4 is placed next to the take-out rolls 2, on which a package 3 of treated yarn is placed.
will be established. Reference numeral 6 denotes a feed roll, which constitutes one system for drawing out the yarn 6 constituting a part of the core yarn from the bobbin 7 and supplying it to the fluid turbulence nozzle 1.

Another series is the series of threads 8 that make up the slab portion 21. The group system 8 is drawn out from the bobbin 9, fed by either the low-speed feed roll 1o or the high-speed feed roll 11, and sent to the air sucker set nozzle 1. To give an example of the feed rate of the low-speed feed roll 10 and the high-speed feed roll 11, the low-speed feed roll 1o is set at 15 to 30% compared to the take-out roll 2, which is the same as that of the feed roll 6, and the high-speed feed roll 11 is set to overfeed. The rate shall be 80-100%. The air sucker set nozzle 12 is a yarn sending means configured to suction and take out the yarn by ejecting jet force gas in the traveling direction of the yarn passing through the yarn passing hole, and includes the feed roll 10 or 11 and the air sucker set. The yarn can be fed to the fluid turbulence nozzle 1 by completely eliminating the slack in the yarn between the nozzle 12 and the nozzle 12. 13 is a reciprocating thread guide.

The yarn 7 pulled out from the bobbin 7 is nipped by the feed roll 6 and fed to the fluid turbulence nozzle 1 at an overfeed rate of about 15 to 30% with respect to the circumferential speed of the take-out roll 2.

On the other hand, the thread 7 pulled out from the bobbin 9 is distributed to the left and right at appropriate time intervals by a reciprocating guide 13.

Each time the thread guide 13 moves from side to side, the feed roll 1
Move between o or 11 nips. In the case of the low-speed foot roll 1o, the overfeed rate is 15 to 30% with respect to the take-out roll 2, and the high-speed feed roll 11
In this case, the overfeed rate is 80 to 100%, and when the yarn 8 is fed by the low-speed overfeed roll 1o, the yarn 6 and the yarn 8 are fed to the fluid turbulence nozzle 1 at the same feeding rate. In order to achieve this, they are appropriately mixed within the same nozzle 1 to form an integral core portion 22. Then, when the guide 13 feeds the yarn 8 to the nip point of the high-speed feed roll 11, the yarn 8 is fed at an overfeed rate of 80 to 100%, but this excess yarn is immediately transferred to the air sucker. The fluid is sucked by a set of nozzles 12 and fed into the fluid turbulence nozzle 1 . The excess threads therefore quickly become entangled with the threads 6 in the fluid turbulence nozzle 1 and form a slab portion 21. Therefore, the yarn 8 is
The longer the overfeeding time, the longer the length of the slab portion 21 formed on the yarn e. In addition, by reciprocating the guide 13 and changing the timing of changing the overfeed rate of the yarn 8, the position where the slab portion 21 is generated in the yarn 6 changes, and the position where the slab portion 21 is generated and its size are as follows. It changes depending on the reciprocating period of the guide 13.

Therefore, this period can be extracted using a cam or the like, or the at-random operation can be stored in a computer, and it can be extracted electrically and reciprocated.

In the above, it is preferable that the air sucker set nozzle 12 is provided very close to the fluid turbulence nozzle 1.

This is because the excessively fed yarn 8 sucked by the air sucker set nozzle 12 is immediately wound around the yarn 6 by the fluid turbulence nozzle 1, causing the slab portion 21 and other yarns to be wound. The distinction between the two parts is clear. Then, the yarn fed by the low-speed feed roll 1o enters the fluid turbulence nozzle 1 at the same yarn feeding speed as the yarn 6, so at that time, both yarns become entwined with each other in the same nozzle and become one piece. A slab-like part does not appear.

As described above, the method of the present invention supplies the first series of yarns consisting of the yarns 6 with the second series of yarns having an increased or the same overfeed rate, thereby reducing the overfeeding with an increased overfeed rate. If there is, immediately feed the family system to the fluid turbulence nozzle 1 so that it is wrapped around the first series of threads,
Since the envelope portion is the slab 21, the slab portion 21
is more pronounced compared to other parts, and even in the event of overfeed, the yarn feeding to the high speed feed ruler 11 and the low speed feed ruler 1o is rapidly switched at random by the yarn guide 13, so that the yarn The slab appearance position and length on 6 can be irregular.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an apparatus for carrying out the method of the invention, and FIG. 2 is a perspective view of a slab yarn. 1... Fluid turbulence nozzle 2... Take-out roll 6.
・・Feed roll 6.8・! 10-...Low speed feed roll 11...High speed feed roll
12...Air sucker set nozzle 13...Thread guide patent applicant Murata Machinery Co., Ltd. Patent attorney Masaru Ohno, Kaneko Ohno, Yanosuke Daisuke

Claims (1)

[Claims] A first series of yarns is fed to the fluid turbulence nozzle at an overfeed rate slightly higher than its withdrawal speed, and a second series of yarns is fed at a rate equal to the overfeed rate of the first series of yarns. When the yarn is combined with the first series of yarns through an air sucker set nozzle and fed to a fluid turbulence nozzle, and when the yarn is fed through an air sucker set nozzle at a feed rate higher than the overfeed rate of the first series yarn. When the threads of the first series are combined and fed to the fluid turbulence nozzle, and when the threads of the first series are fed to the fluid turbulence nozzle, the threads of the first series are 2
A method for producing a slub yarn, characterized by forming a slub by entangling and enveloping yarns of the above series. .