JPS6075620A - Air false twisting nozzle for bundled spinning - Google Patents

Abstract

PURPOSE:To avoid the disturbance of a fiber bundle, by making the distance between the peripheral surface of one of rolls in a pair of delivery rolls and the end of a flat inlet opening of an air false twisting nozzle different form the distance between the peripheral surface of the other of rolls in the delivery rolls and the end of a flat inlet opening. CONSTITUTION:An air false twisting nozzle 4 has a flat inlet opening (4a) extendedly present in the shaft direction of front rolls 3 and 3'. The distance (g) between the peripheral surface of a bottom front roll 3 having flutes provided thereon and the end (4aa) of the flat inlet opening (4a) is greater than the distance (g') between the peripheral surface of the top front roll 3' and the end (4ab) of the flat inlet opening (4a). The air stream accompanying the front rolls 3 and 3' is rectified, and the aimed uniform regular bundled spun yarns are obtained.

Description

[Detailed description of the invention] Technical field The present invention relates to an air heating nozzle for bundle spinning.

More specifically, the present invention relates to an air heating nozzle for bundle spinning that heats a fiber bundle with an air flow and winds free fibers around the surface of the fiber bundle to form a bundle spun yarn.

Description of the Prior Art An air heating spinning device includes a draft mechanism consisting of a plurality of pairs of draft rollers, and an air heating nozzle is provided downstream of and close to the front roller of the draft mechanism. Untwisted ribbon-like I being fed out
The IA fiber bundle is introduced into an air heating nozzle, heated by an air stream, and the free fibers are wound around the fiber bundle to form a spun yarn.It is possible to spin at high speeds of 1001I1 or more per minute, and has attracted attention in recent years. .

However, when spinning at such a high speed, an airflow is generated that accompanies the high-speed rotating Freon 1 to roller, and this accompanying airflow disturbs the fiber bundle (fleece) supplied from the nip point between Freon 1 and the roller. be done.

If the fiber bundle is disturbed by the accompanying air current, a sufficiently uniform and regular bound spun yarn cannot be produced even if the fiber bundle is heated and untwisted using a conventional air heating nozzle.

Purpose of the Invention The present invention rectifies the accompanying airflow accompanying a front roller rotating at high speed to prevent the 11 fiber bundles from being disturbed by the accompanying airflow when heating the fiber bundle with an air heating nozzle, and to uniformly
Another object of the present invention is to provide an air heating nozzle that can produce regular bound spun yarn.

Structure of the Invention The present invention provides a front roller that is disposed downstream of a pair of l-fiber delivery rollers (front rollers) and close to the circumferential surface of the delivery rollers, and that is flattened along the axial direction of the delivery rollers. In an air heating nozzle for binding spinning having a flat inlet opening, the distance between the curved surface of one of the pair of delivery rollers and the end of the flat entrance opening is set such that the distance between the circumferential surface of the other delivery roller and the flat end IIN greater than the distance between the end of the inlet opening
The above-mentioned object is achieved by an air heating nozzle for bundle spinning which is capable of heating the free fibers generated at both ends of the bundle without disturbing them.

In a preferred embodiment of the present invention, jetties extending in the circumferential direction of the delivery roller are formed at both ends of the inlet opening having the larger distance (as viewed in the axial direction of the delivery roller) to further enhance the rectifying effect. I'm trying to increase it.

Furthermore, by making the top surface of this jetty arc-shaped along the circumferential surface of the roller, the top surface of the jetty can be brought sufficiently close to the peripheral surface of the fiber bundle delivery roller, and from the side of the air heating nozzle. It is possible to prevent the accompanying airflow from flowing into the inlet of the air heating nozzle, and further prevent disturbance of the 1liN bundle.

In the above case, by increasing the gap between the roller circumferential surface having a larger distance and the nozzle tip surface connected to the flat inlet as the distance from the end of the flat inlet opening increases, the gap can be increased. It is possible to reduce the collision area between the air flow sucked into the air heating nozzle and the air flow accompanying the AN bundle delivery roller, thereby reducing the degree of turbulence and further preventing disturbance of the fiber bundle. .

Further, it is preferable that the roller having a longer distance is a bottom roller having a flute carved on its circumferential surface.

DESCRIPTION OF THE EMBODIMENTS The present invention will now be described in detail with reference to the drawings, which illustrate preferred embodiments of the invention.

FIG. 1 is a side view showing the spinning state of the binding spinning device according to the present invention. In FIG. 1, the draft mechanism includes a back roller 1.1', a middle apron 2.2', and a front roller 3.3. ′.

An air heating nozzle 4 is provided downstream of the front roller 3.3' and in the vicinity of the front roller 3.3'. A dust box 10 is installed downstream of the air heating nozzle 4, that is, on the upper side in FIG.

Fleece F back roller 1.1', middle apron 2
．． 2' and a front roller 3.3', the fiber bundle is drafted to a predetermined magnification into a ribbon-like fiber bundle, heated by an air heating nozzle 4, untwisted to form a bound spun yarn, and drawn out. It is wound onto a bobbin B as a package P via a roller 5.5' and a traversing drum 6.

Next, referring to FIG. 2, the first part of the air heating nozzle of the present invention will be explained.
An example will be explained.

The pair of front rollers 3 and 3' mentioned above are the fiber bundle delivery rollers of the present invention, and the bottom roller 3 has a flute carved on its surface, and the bottom roller 3 has a top roller 3.
′ is set opposite. An air heating nozzle 4 is arranged downstream of the front roller 3.3', close to the curve of the front roller 3.3'. The air heating nozzle 4 has a flat inlet opening 4a extending in the axial direction of the front roller 3.3'.

Among the front rollers 3.3', the fluted peripheral surface of the bottom roller 3 and the end 4aa of the flat inlet opening 4a
The distance Q between the top front roller 3' and the end 4ab of the flat inlet opening 4a is the distance II! tg'
It's bigger. In addition, 1.5111' ≦ Q
It is preferable to set it as ≦3.50'.

In addition, on the tip end surface of the air heating nozzle 4 facing the bottom front roller 3', as shown in FIGS. A pair of jetties 4b extending in the circumferential direction of the front roller 3.3' are formed at both end positions.

As described above, by making the distance between the ends 4aa, 4ab of the inlet opening 4a of the air heating nozzle 4 and the roller 3.3' larger than the other, the air heating nozzle 4 is moved from the inlet to the yarn path. A greater amount of airflow will be drawn through one gap (ie, the larger gap). Therefore, this air flow causes a wide m traveling through the inlet opening 4a.
The fiber bundle is inserted into one side of the flat entrance aperture 4a (i.e.
This means that it is forced to move while pressing against the side with the smaller gap. As a result, the free mm at both ends of the fiber bundle is less disturbed by the front roller 3.3', and the same effect as increasing the number of free fibers occurs, thus producing a good bound spun yarn. can.

In this case, if a large amount of air is sucked in in the axial direction of the bottom front row 53, which has a large gap with the air heating nozzle 4, there is a risk that the free fibers at both ends of the m-reflection may be disturbed. However, in the embodiment described above, the jetties 4b are formed at both ends (as viewed in the axial direction) of the inlet opening 4a on the tip surface of the air heating nozzle 4 facing the bottom front roller 3, so that the intake air in the axial direction is This suppresses the flow and further enhances the rectification effect.

In addition, ff1l with the end of the inlet opening of the air heating nozzle 4
The roller for which l is large is preferably a metal roller, as shown in this embodiment, and is preferably a bottom roller with flutes carved on the roller surface. This is compared to the top roller, which is usually made of rubber and has a smooth surface.
This is because the effects of the present invention are noticeable because the accompanying airflow is generated intensely.

In another embodiment shown in FIG.
QsO+ is increased with increasing distance from the flat inlet aperture end 4aa. With this configuration, the bottom front roller 3 and the air heating nozzle 4
The area with the smallest cross-sectional area extends in the circumferential direction of the front roller 3 1, and the air flow passing through the gap and flowing in opposite directions to the air heating nozzle 4 and the air flow that accompanies the bottom front roller 3. The region of collision with the airflow (ie, the minimum cross-sectional area) can be reduced, the degree of turbulence can be reduced, and disturbance of the fiber bundle can be prevented.

Furthermore, as in the embodiments shown in FIGS. 2 and 6, the top surface of the jetty 4b is shaped like an arc along the circumferential surface of the bottom front roller 3, so that the top surface of the jetty 4b is aligned with the circumferential surface of the bottom front roller 3. It can be placed sufficiently close to the surface of the air heating nozzle 4, preventing the accompanying airflow from flowing into the inlet opening of the air heating nozzle 4 from the side of the air heating nozzle 4, further preventing disturbance of the fiber bundle, and providing a good bound spun yarn. can be manufactured.

Further, as shown in FIG. 6, the yarn path inside the air heating nozzle 4 is bent by an angle θ to bring the lllN bundle into contact with the inner wall surface of the yarn path of the air heating nozzle 4, and the front roller 3
．． Even if the twisting in the 3' direction is prevented to some extent and the reduction of free fibers in the fiber bundle in the front row 53.3' due to the twisting is reduced, a good bound spun yarn can be produced. good.

In this case, the bending angle θ should be at most 80". If this value is exceeded, the twisting effect of the air heating nozzle will be insufficient;
It becomes impossible to obtain good binding thread.

Effects of the Invention According to the present invention, it is possible to rectify the accompanying airflow accompanying the high-speed rotating front aperture to prevent the m-return from being disturbed by the accompanying airflow when heating the fiber bundle with the air heating nozzle.
Uniform and regular bound spun yarn can be produced.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the spinning state of the binding spinning device according to the present invention, FIG. 2 is an enlarged partially sectional side view of the front roller and air heating nozzle shown in FIG. 1, and FIG. 3 is the side view shown in FIG. 2. ■■
The arrow view, Figure 4 is the ■ arrow view of Figure 2, Figures 5 and 6.
The figures are sectional views of other embodiments of the invention. 3...Bottom front roller, 3'...Top front roller, 4...Air heating nozzle, 4a...Inlet opening, 4b...
... Jetty, 4aa14ab ... End of inlet opening Ω ... Larger distance, u' ... Smaller distance Figure 5 Figure 6 Patent Application No. 184174 2, Title of the Invention Figure 2 of the air heating nozzle for binding and spinning is attached] Replace with Figure 2 of the drawing.

Claims (1)

[Claims] 1. Disposed downstream of a pair of fiber bundle delivery rollers, close to the circumferential surface of the delivery rollers, and having a flat inlet opening along the axial direction of the delivery rollers. In the air heating nozzle for bundle spinning, the distance between the peripheral surface of one of the pair of delivery rollers and the end of the flat entrance opening is determined by the distance between the peripheral surface of the other delivery roller and the end of the flat entrance opening. An air heating nozzle for bundled spinning, characterized in that the distance between the air heating nozzle and the end of the air heating nozzle is greater than the distance between the two ends of the air heating nozzle. 2. The bundle spinning device according to claim 1, wherein jetties extending in the circumferential direction of the delivery roller are formed at both ends of the inlet opening having the larger distance when viewed in the axial direction of the delivery roller. Air heating nozzle. 3. The air heating nozzle for bound spinning according to claim 2, wherein the top surface of the jetty has an arc shape along the circumferential surface of the O-ra. 4. The circumferential surface of the roller with the larger distance connects to the flat entrance opening/the tip of the roller 1WI11! The air heating nozzle for bundle spinning according to any one of claims 1 to 3, wherein the air heating nozzle increases as the distance from the end of the flat inlet opening increases. 5. The air heating nozzle for bundle spinning according to any one of claims 1 to 4, wherein a flute is carved on the peripheral surface of the roller having the larger distance.