JP3210752B2 - Yarn fluid treatment nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for spraying a fluid onto a multifilament yarn to impart entanglement and convergence to the yarn.

[0002]

2. Description of the Related Art In semi-synthetic and synthetic fibers, it is possible to prevent breakage of filaments and irregularities in winding shape in the raw yarn manufacturing process, and fuzziness and poor quality due to poor yarn convergence in various processes such as twisting, warping, sizing and knitting. In order to
Interlacing technology is widely introduced today. Also,
For fibers excellent in composite suitability with other fibers, such as acetate fibers, many mixed filament yarns have been developed and marketed, and as a method of interlacing these mixed filament yarns, an interlacing technique is indispensable. It has become something.

In general, this interlacing technique is performed by using a fluid processing nozzle provided with a fluid ejection hole so as to be substantially orthogonal to a yarn path through which the yarn travels. By causing a plurality of swirling airflows in opposite directions in the yarn path hole by acting on the air fluid, the filaments are entangled with each other to give the yarn a convergence. Therefore, various interlaced nozzles have been proposed so far in order to perform this function more effectively. For example, 50-1
No. 632 proposes a method in which two fluid introduction pipes are opened with respect to the yarn passage against the side wall of the yarn passage, and the outlet cross-sectional area of the yarn passage is smaller than the entrance side. . Further, Japanese Patent Publication No. 3-61772 discloses that two fluid injection holes are opened at positions facing each other in the same cross section of the yarn passage hole, and the cross-sectional area of the fluid injection hole and the cross-sectional area of the yarn passage hole are specified. Thus, a method of increasing the number of confounds without increasing the pressure of the fluid ejection is disclosed.

[0004]

The interlace nozzle is based on the action of the fluid injected into the yarn path hole.
This jet fluid is basically divided into a component that works in the cross section direction of the yarn path and a component that works in the longitudinal direction of the yarn path, and the former forms a swirling flow in the direction opposite to the cross section direction, and entangles the yarn. , But the latter is said to contribute little to the entanglement of the yarn.

[0005] When the fluid processing nozzle is originally applied to a continuous process such as a spinning process, a running yarn is added to a yarn path hole in addition to a thread path hole and a fluid injection hole that are components related to entanglement. It is necessary to provide a slit to be introduced over the entire yarn path hole.

[0006] However, in recent years, there has been a demand for dense mixed filament yarns having extremely high entanglement.
The present invention has been made in view of the above circumstances, and aims to provide a device that can efficiently utilize a jet fluid, ensure higher entanglement performance, and can be used safely even in a continuous process.

[0007]

That is, the gist of the present invention is that the cross section of the thread hole is circular, and the fluid ejection hole is opened perpendicular to the center axis of the thread hole. In the fluid processing nozzle , the ratio of the diameter of the thread path hole at the portion where the fluid ejection hole is open to the diameter of the thread path hole on the entrance side and the exit side of the thread path hole of the fluid processing nozzle (fluid injection hole opening Thread hole
Diameter / diameter of the yarn path hole on the entering side and the yarn path at the opening of the fluid injection hole
Pore size / yarn path hole outlet side yarn path pore diameter) is a yarn fluid processing nozzle, characterized in that 1.2-1.8.

Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows an example of the present invention, and FIGS. 2 and 3 show AA ′ sectional view and BB ′ sectional view of FIG. 1, respectively.
FIG. 5 shows another example of the present invention. FIG. 6 is a model diagram of the fluid near the fluid injection hole.
1 to 6, reference numeral 1 denotes a yarn introduction slit, 2 denotes a fluid ejection hole, and 3 denotes a yarn path hole.

In general, in a fluid processing nozzle , a compressed fluid injected from a fluid injection hole collides with a wall opposite the injection hole,
Some forms conflicting swirling flow to the yarn path hole cross-sectional direction as shown in FIG. 6, but some Continue along the yarn path hole Roh
It is discharged outside the chisel . Therefore it is possible to enhance the treatment effect by whether to reduce this latter component squid <br/>, also how to use.

In the present invention, specifically, FIGS.
As shown in the figure, the diameter of the yarn pathFluid processing nozzle
ofThread introduction hole entry sideas well asLarger than the exit hole diameter, and
By taking a shape that slightly inflates the center,
This facilitates the formation of swirling flow and effectively performs confounding.
You. This effect is almost the same even when there are multiple fluid injection holes.
It is. However, if this bulge is too large,
The circulation is weakened and the effect is reduced. Therefore, the present invention
In, the yarn path diameter of the portion where the fluid ejection hole is open
And the diameter of the thread hole diameter on the entrance side and the thread hole exit side(Flow
Yarn path hole diameter of the body injection hole opening / thread path hole diameter on the side with the yarn path hole and
Fluid hole diameter at the opening of the fluid injection hole / diameter of the thread hole on the exit side of the thread hole)
Is an essential condition to be 1.2 to 1.8.

When the present invention is applied to a continuous process such as a spinning process, it is preferable to provide a slit for introducing the running yarn into the yarn path hole over the entire yarn path hole. However, when there is a slit, the swirling flow is weakened, the number of entanglements tends to decrease, and the yarn tends to jump out of the slit.
Therefore, when a slit for introducing a yarn is provided in these fluid processing nozzles , it is desirable that the slit should match the direction of the flow of the injected fluid with the direction of the introduction of the yarn as much as possible, and as shown in FIG. It is preferable to provide a slit for introducing the yarn path perpendicular to the fluid ejection hole on a surface tangent to the yarn path hole at the opening to the yarn path hole. By providing a slit in such a portion, escape of the ejected fluid from the slit can be suppressed, a decrease in the number of entanglements can be suppressed, and a yarn can be prevented from jumping out of the slit. Further, the width of the slit is preferably as narrow as possible, and is preferably about 0.2 mm or less.

[0012]

The present invention will be described in detail with reference to the following examples. [Example 1-3, Comparative Example 1-4] Cellulose triacetate filament 55d / 15f
Immediately before the winding in the spinning process, the ratio (hole diameter) of the yarn fluid processing nozzle <the diameter of the yarn passage hole at the portion where the fluid ejection hole is opened and the yarn passage hole diameter at the entrance side and the exit side of the yarn passage hole Ratio of the fluid injection hole to the yarn path hole, and a yarn path slit perpendicular to the fluid injection hole on the surface tangent to the line path. Nozzle > was installed and combined with the 30d / 12f drawn yarn of the polyester filament, and the compressed air pressure and running yarn jumping out of the nozzle during fluid treatment and the level of entanglement between filaments were examined. The slit width of each of the devices used for the study was 0.2 mm. The results are shown in Table 1.

[0013]

[Table 1]

[Comparative Example 5] As Comparative Example 5, fluid treatment was performed using a slit arranged in a plane perpendicular to the central axis of the fluid jet and passing through the central axis of the yarn path hole. The slit width of the device used for the study was 0.2 mm.

As a result, in Comparative Example 5, when the air pressure exceeds 1.5 kg / cm ² , a phenomenon that the yarn sometimes jumps out of the slit is observed, and when the air pressure exceeds 2.0 kg / cm ² , it is difficult to perform a stable treatment. Become. On the other hand, in Examples 1 to 3 and Comparative Examples 1 to 3, the running yarn did not jump out to the high processing pressure range, and stable processing was possible. However, in Comparative Examples 3 and 4, in which the hole diameter ratio exceeds 1.9, the swollen flow is weakened because the bulge portion of the thread hole is too large, and the number of entanglements is slightly reduced. On the other hand, Comparative Examples 1 and 2 having a hole diameter ratio of less than 1.2
In this case, the swollen flow was weakened because the swollen portion was too small, and the number of confounds decreased. Therefore, yarn fluid treatment nose
If the pore diameter ratio is not in the range of 1.2 to 1.8, it will be understood that the dense entanglement aimed at by the present invention cannot be obtained.

FIG. 7 shows Example 2 and Comparative Examples 1 and 5.
5 is a graph showing the results of comparing the confounding performances using the. In the drawing, a shows a nozzle (Example 2) which is a study example of the present invention, b shows Comparative Example 1 having a different thread hole shape, and c shows Comparative Example 5 having a different slit position. Comparative Example 1 has an air pressure of 5 kg
It can be seen that stable processing can be performed up to / cm ^2, but the confounding level is low. Further, the triacetate / polyester composite yarn obtained in the examples of the present invention was rich in bulkiness due to high entanglement, and the woven or knitted product was rich and voluminous.

[0017]

According to the present invention, in a continuous process such as a spinning process, even when removing equipment as needed or changing a combination material, it can be performed without any trouble on the yarn during continuous spinning. A great improvement in the confounding performance can be expected as compared with the related art, and the effect is great, for example, it is possible to manufacture advanced materials.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line A-A 'in FIG.

FIG. 3 is a sectional view taken along line B-B 'in FIG.

4 and 5 are diagrams showing another embodiment of the present invention.

FIG. 6 is a model diagram of a fluid near a fluid ejection hole according to the present invention.

FIG. 7 is a graph showing the examination results of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yarn introduction slit 2 Fluid ejection hole 3 Yarn path hole

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D02J 1/00-13/00

Claims (2)

(57) [Claims] 1. A fluid processing nozzle in which a cross-sectional shape of a thread passage hole is circular and a fluid ejection hole is opened perpendicular to a center axis of the thread passage hole. The ratio of the diameter of the thread passage hole of the portion to the diameter of the thread passage hole on the inlet side and the exit side of the thread passage hole of the fluid processing nozzle (the thread passage hole at the opening of the fluid injection hole)
Diameter / diameter of the yarn path hole on the entering side and the yarn path at the opening of the fluid injection hole
Pore size / yarn path hole outlet side yarn path pore size) is, yarn fluid processing nozzle, characterized in that 1.2-1.8. 2. The yarn fluid according to claim 1, wherein a slit for introducing a yarn path perpendicular to the fluid injection hole is provided on a surface tangent to the yarn path hole at an opening portion of the fluid injection hole to the yarn path hole. Processing nozzle .