JPS5966527A - Yarn ending in bundle-binding spinning machine - Google Patents

Abstract

PURPOSE:In a bundle-binding spinning machine, yarn ending is carried out by overlapping the yarn end and the fiber bundle to be spun in a specific length to increase yarn ending performance and give a connected yarn with a small knot. CONSTITUTION:In a bundle-binding spinning machine where the bundle A is fed from the drafting zone in the draft machine 2, introduced into the false twisting path 11 in the false-twisting nozzle 3, twisted by the air flow jetted from the hole 12 to form the spun yarn B and the yarn is wound up around the bobbin to form a package P, yarn ending is carried out by overlapping the yarn end on the package side and the end of the fiber bundle in a length L which is calculated by the equation (where l is average fiber length of the bundle) and introducing the overlapped yarn into the twisting path 11 in the nozzle 3 to effect interlace connection by turbulence flow. Thus, the yarn ending performance is improved and further a yarn with a small-sized knot is obtained.

Description

[Detailed description of the invention] The present invention relates to a yarn splicing method in binding spinning ^j1.

More specifically, the present invention relates to a yarn splicing method that produces a spliced portion having a strength comparable to that of a yarn tube or light in bundle spinning.
, , - In binding spinning, in which the ribbon-shaped KR#lI8 bundles spun directly from the draft device are introduced into the air false twisting nozzle while maintaining their continuity, and a vortex is applied to form a binding yarn, 1. The structure of the yarn is different from that of conventional ring-sheath spinning.The almost parallel untwisted core fibers/bundles in the center are tightly wound and restrained by the fibers on the outer periphery, so it is simply a bow! If you just tear it off, the structure of the end of the thread will be delicate.
The ideal distribution as shown in FIG. 1(b) is not obtained, but is shown in FIG. 1(a). This results in an uneven distribution. Therefore, when performing yarn splicing, the so-called sgelizing method of yarn splicing, in which the fibers on the yarn end side are intertwined with the fibers on the east side of the fibers and integrated, has a low success rate and has not yet been put into practical use.

The inventors of the present invention have conducted various studies in order to solve the drawbacks of the conventional steaming technology, and as a result, the length of the yarn end to be overlapped at the time of yarn splicing and the unheated fiber end is within an appropriate range. He discovered that the success rate of yarn splicing can be improved and that the threads that are not conspicuous in the splicing tube can be eliminated, and the present invention has been completed.

That is, the present invention provides a binding spinning device in which a fiber bundle spun from a draft device is introduced into a heating passage of an air false twisting nozzle, heated, and formed into a binding yarn with a number of turns, 9 times. , for thread splicing.

In this case, a yarn splicing method in a binding spinning device L=0 characterized in that the □ pack ° - side yarn end and bundle part are overlapped in the draft area by a length determined by the following formula: .87~3. Ot where t is intended to provide the average fiber length of the fiber bundle.

The present invention will be explained in more detail below with reference to the accompanying drawings.

For example, as shown in FIG.
, air false twist nozzle 3, draw-off roller 4, 4', Qihua Tsujiloaf 5N'L=! A device equipped with an arm 10 that supports a drafting gobin is used, and in particular, the rollers 6, 7, and 8 on the tonneau side that constitute the drafting device 2 are individually deformed by pressure means such as an air cylinder. It is pressed by the tom roller and can be released and released from the bottom roller as necessary. Moreover, yl
,”)Muro-2,,6,',,7',,8'
are separately connected to electromagnetic clutches (not shown).
The electromagnetic clutch is connected to the drive shaft via the electromagnetic clutch, and can be individually stopped and restarted as required by an operating signal to the electromagnetic clutch.

The fiber bundle A is provided to a drafting device i, receives a draft of a desired magnification, and is sent out as a ribbon-like fiber from a front roller 6.6', passing through a false twisting nozzle 3 and passing through a heating passage 11. The tapered roller 5U receives the heating effect of the vortex flow generated by the air flow that is introduced into the interior of the passageway 11 and is injected from the air injection hole 12 provided around the passage 11, and becomes the binding thread B. yJ? It is wound up into a bottle and formed into a package P.

When a yarn breakage occurs in the bundling spinning device having the above-mentioned structure, this is detected by a detection means (not shown) provided in a part of the yarn spinning path, and the signal causes the supply of air to the false twisting nozzle to be stopped. In addition, the electromagnetic clutch associated with the pack roller 8' and the middle row 27' of the thread trimming spindle is activated, and the pack rollers 8, 8', the middle roller 7.7', and the apron 7a wound thereon are activated.
, 7'a stops rotating. But front row 26
, 6' continue their slow rotation, they are cut while slipping from the soft clamping of the fiber expanding apron 7a, a7/a, and the separated portions are discharged from the draft zone.

On the other hand, the delicate bundle stops after positioning its tip within the gripping area of the apron 7a #7'a by a distance S from the nip point of the front roller. The distance S has a substantially constant value in accordance with the average fiber length t of the fiber bundle, and the fiber A fabric at the tip has a tapered shape as shown in FIG. 1(b).

At this point, the front is Tom 4-26′ IL! The first rotation is stopped, and at the same time, the pressure on the front top roller 6 is released, and the space between the two rollers 6 and 6' is I? J l'il.

On the other hand, the package PI is opened by the taper lug roller 5 in response to the thread trimming detection signal G'+, and the known rewinding roller 24 comes into contact with this and is reversed. The yarn end is captured and conveyed to the outlet 3aiC of the false twisting nozzle 3. A known suction pipe 26 is waiting at the inlet 3b of the false twisting nozzle 3.
Intake air is applied through the heating passage 11 to heat the yarn end through the heating passage 1.
1, and after being inserted and suctioned, it passes between the separated front rollers 6 and 6', and is pulled upward from between the front top roller 6 and the apron 7a, and waits. At the standby position, the suction pipe 26 is connected from the front roller nip point to the front roller nip point.
The length of the thread reaching the tip is set equal to a predetermined distance described later. (Fig. 3) Next, the middle roller 7' and the pack row 28' start operating, and the tip of the fiber bundle held between the aprons 7a * 7'a moves over the distance S and reaches the front. When the roller 6.6 moves forward to position 1 corresponding to the nip point of the 6', the 70 controller 6 is re-pressurized and the tom roller 6'
engage. At the same time, the yarn end held by the suction tube 26 is cut by a known cutter 27 provided near the standby position of the suction tube 26, and the supply of air into the air false twist nozzle 3 is completely resumed.

This series of operations is automatically performed via electromagnetic, relay circuits, etc. that operate sequentially with time delays determined experimentally in advance according to the spinning speed of the device, the fiber length of the spun fiber bundle, etc. It can be done.

By the diagonal upward operation, the yarn end on the package side and the tip of the fiber bundle are overlapped with each other with overlapping lengths just before entering the front roller. One person's clothes are inside, heated by the vortex and Δ0
They are intertwined and joined together.

Here, the superposition length Ll-! L=0.8A to 3.0 with respect to the average fiber length t of the fibers constituting the fiber bundle. As is clear from the graph in Fig. 4, which shows the relationship between the yarn splicing failure rate and the yarn splicing failure rate, which must be within the range of Undesirable. Possible reasons for this are as follows.

1. If L is less than 0.8, the number of constituent fibers for 1211 overlaps is too small and the fibers cannot withstand the tension during splicing and are cut.

2. L is 3. When O4 is exceeded, the thickness of the tiL yarn increases, its mass increases, and when it rotates in the heating passage due to the vortex, the centrifugal force becomes excessive and the inner circumferential wall of the false twisting nozzle becomes large. The collision is severe and the binding effect is insufficient, leading to thread breakage.

Also, even if the thread splicing is successful, if the thread length is 0.8t, the seam will be thin, and if the thread length is 3.0t, the thick thread will be long, which will cause problems in terms of product quality. .

Furthermore, the condition of the yarn end on the package side is that when it is cut perpendicular to the yarn axis using shearing force such as scissors, the distribution of i# is better when it is cut by rubbing it with a rough surface such as sandpaper or matrix. Since the arrangement is tapered and spread, the entanglement with the tips of the fiber bundles is good, and there is no sudden change in thickness at the seam, which is very nice.

Note that FIG. 5 schematically shows how the thickness of the stitch changes depending on the overlapping length of the yarn end and the tip of the bundle. In the figure, the solid line in the overlapping portion shows the case where the yarn end is loosened into a tapered line shape by the above-mentioned rubbing, and the two-dot chain line shows the case where it is cut perpendicular to the yarn axis.

As detailed above, according to the present invention, when splicing the yarn in the bundle spinning device, the package side yarn end and the fiber bundle tip are folded to a length of J square in the draft zone. The splicing success rate t and jl are the same as above for M, and the spun yarn is spliced 1. Evenly high quality can be obtained in 111 minutes.

In addition, as a yarn splicing operation, in 1 of this specification, the yarn end on the package side is fed backward through the false twisting nozzle, past the nip point of the front row 2, and the yarn end is turned into a fiber bundle at 1j11 in front of the apron. However, the method of the present invention is not limited to this. For example, the n and jl fiber bundle tips are stopped between the pack roller and the apron, and the package side yarn ends are moved beyond the apron into the draft zone. You can also leave it on standby and press the stand in the soft pressure area of the apron.
In this case, the high-magnification draft between the front roller and the apron will improve the quality of the K-seam area. It is also possible to provide a slit 7 along the heating path on the back side, and in this case, i'e
Since the yarn end once gripped on the surface of the yarn can be conveyed to the standby position without releasing the grip, the yarn splicing success rate can be further improved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the fiber distribution at the end of the cut yarn. (,) shows a typical case of a binding yarn, and (b) shows a case of uniform distribution. FIG. 2 is an explanatory view showing a state during spinning of a binding and spinning device that implements the method of the present invention, and FIG. 3 is an explanatory view showing a yarn splicing operation thereof. FIG. 4 is a graph showing the distance between the yarn end and the east end of the fiber during yarn splicing: the relationship between the length and the yarn splicing failure rate, and FIG. 5 is a schematic diagram showing the thickness of the seam portion. 2...Draft device, 3...Air false twist nozzle, 5.
...Take-up roller, 24...@Return roller, 2
5... Thread catcher, 26... Vacuum purchase, 27...
・Cutter, A... Sushipa (a! Fiber bundle, B... Thread, P... Package. Figure 1 (a) Henko L (bl Distortion \ Figure 2 Figure 3 Figure 4) % 0.8J2 3.0 bristles □ Tip overlap length Figure 5

Claims (1)

[Scope of Claims] (1) The fiber bundle spun from the draft area of the drafting device is introduced into the heating passage of the air false twisting nozzle, heated, and twisted and twisted so as to be wound and formed into a package. , a binding spinning device W, characterized in that, when splicing the yarn, the cage side yarn end and the fiber east end are overlapped within the draft area by a length determined by the following formula.
41 Yarn splicing method in device iM・
・ , 4. =o,,s'4. ~3, Ot, where t is the average fiber length of the fiber bundle