JPS6023326Y2 - Yarn processing nozzle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a yarn processing nozzle used for texturing multifilament yarn, and particularly relates to a yarn processing nozzle that is used to texture at least one, preferably two or more multifilament yarns. The present invention relates to a nozzle for processing yarn suitable for efficiently and uniformly applying it.

Conventionally, as a device for imparting loops or entanglements to multifilament yarn, as seen in Japanese Patent Publication No. 35-1673, etc., a flow of air or compressible fluid is rapidly ejected from a restricted space to generate fluid. Yarn processing nozzles are widely known that create a disturbed zone and feed the multifilament yarn to be treated into this stream, opening it into individual filaments and imparting loops and entanglements.

Furthermore, various yarn processing nozzles have been proposed that improve the basic structure of the yarn processing nozzle and provide loops and entanglements to multifilament yarns more quickly and economically.

However, according to these conventional yarn processing nozzles, the flow rate of fluid consumed during high-speed processing is large, and when tension is applied to the obtained yarn in the direction of the yarn axis, loops and entanglements are weakly formed. There are drawbacks such as loops and tangles easily coming undone, making it difficult to efficiently produce bulky yarn.

An object of the present invention is to provide a yarn processing nozzle that is different from conventional yarn processing nozzles and is suitable for efficiently and strongly imparting loops and entanglements to multifilament yarns at high speed.

The present invention has the following configuration in order to achieve this objective.

That is, the present invention provides a space formed by two conical side surfaces arranged concentrically with a small gap between them, at least one fluid injection hole opened at the bottom of the space, and the above-mentioned fluid injection hole on the yarn exit side. In a yarn processing nozzle configured to include a yarn exit passageway opening at the top of the conical side surface and a yarn entrance passageway 16 opening at the top of the conical sidewall on the yarn entrance side, the yarn entrance passageway is not divided. Moreover, the only ridge 19 eccentric to the central axis of the conical side surface is provided in the yarn entrance passage 16, leaving a cylindrical space 20 at the tip thereof. This is a yarn processing nozzle.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a longitudinal sectional view of a yarn processing nozzle according to the present invention.

In the figure, a housing 1 has a hole 2 passing through its center.

The housing 1 is provided with at least one fluid injection hole 3 for introducing compressed fluid into the hole 2 .

A pipe 4 connected to a high-pressure fluid supply source (not shown) is screwed into the fluid injection hole 3 .

A yarn outlet passage 5 is provided in the center of the member 7 fitted on the yarn outlet side of the hole 2 of the housing 1, and the yarn outlet passage 5 has a narrow cylindrical narrow portion 27 on the yarn entrance side. It opens on the conical side on the thread entrance side, and opens on the other side towards the thread exit side (
It is gradually expanding (toward the left side of the figure).

The spread angle α is preferably 4 to 10 degrees.

Although the shape of the yarn exit passage 5 is not limited to that shown in the figure, the shape shown in the figure is preferable.

This is to ensure that the loop is stably fixed to the thread obtained by increasing the velocity of the flow jetting out from the guide 8.

In order to prevent wear caused by the multifilament yarn, a guide 8 made of a wear-resistant material such as ceramic is preferably provided at the yarn exit end of the yarn exit passage 5, as shown in the figure.

For the same reason, it is preferable that the narrow overflow portion 27 is also subjected to a hardening treatment or replaced with another wear-resistant material to prevent wear caused by the multifilament yarn.

A screw 10 is provided inside the peripheral portion 9 of the member 7, and the screw 10 is screwed into a screw 11 provided around the housing 1.

12 is a stop ring for fixing the member 7 at the adjusted position.

Numerals 13 and 21 are ring seals that prevent fluid from escaping.

In addition, although the member 7 is molded integrally with the peripheral part 9 in the figure, it is not separately fixed thereto.

Alternatively, the peripheral portion 9 may be omitted and the portion of the member 7 that fits into the hole 2 may be screwed into the hole 2.

The needle portion 14 is inserted tightly or screwed into the hole 2, and its tip is connected to the conical side surface 1 on the thread entrance side.
3.

The conical side surfaces 6 and 15 are arranged concentrically with a small gap between them to form a space 22.

The needle portion 14 may be molded integrally with the housing 1.

The thread entrance passage 16 is provided at the center of the needle portion 14 and has a space 20 and a crest 19 at its tip.

Note that the yarn entrance passage 16 is not divided, unlike that shown in Japanese Utility Model Publication No. 55-12078.

A vortex is formed in the cylindrical space 20 and in front of it (a part of the space 22), and most of the vortex is formed particularly in the cylindrical space 20, as shown in FIG.

When fluid is injected from the fluid injection hole 3 into the space 22 at high speed, two vortex flows 25 and 26 are formed, but the velocity of the fluid injected into the space 22 is different from that on the fluid injection hole side and on the opposite side. However, when one fluid injection hole 3 is provided at the top as shown in the figure, the upper vortex 2 of the vortices formed in the space 20
6 is larger than the vortex 25 at the bottom 1, and therefore the boundary portion thereof is biased toward the side opposite to the fluid injection hole 3.

The boundary portion has the greatest ability to disrupt fiber opening.

Since the depth I of the cylindrical space 20 greatly contributes to the formation of such a vortex, it is preferably 173 to 2 times the inner diameter of the yarn entrance passage 16.

The throttle hole 19' of the throttle part 19 is provided on the side opposite to the fluid injection hole 3, and has the function of ensuring that the yarn path follows the boundary portion.

The eccentric distance β between the center of the conical side surfaces 6, 15 and the center of the embroidered hole 19' is 0.02 to 0.4 times the inner diameter of the thread entrance passage 16, and the inner diameter of the throttle hole 19' is larger than the thread entrance passage. It is preferable to make the inner diameter 0.2 to 0.8 times the inner diameter of No. 16 in order to increase the opening disturbance ability.

Note that the difference in velocity of the fluid passing through the space 22 is caused by fluid injection from only one direction as shown in the figure, but in order to increase this difference in velocity, the fluid passage 29 is created only in one direction as shown in FIG. Attach a ring 28 having a
It is sufficient if it is tilted in the direction of .

Next, the operation of the present invention will be explained.

One or more multifilament yarns (not shown) are fed from the guide 17 at the right end into the yarn inlet passage 16 in an overfeed state, and reach the constriction section 19 where they are eccentrically arranged in a cylindrical shape with respect to the center of the conical side surfaces 6, 15. You will be guided to the space 20 of

At this time, one or more multifilament yarns exiting the constriction section 19 are instantaneously opened and disturbed, resulting in displacement between the individual filaments, forming loops, and entangled yarns passing through the yarn exit path. 5 and are led outside.

Here, after processing the yarn processing nozzle of the present invention shown in Fig. 1 and a nozzle having no space 20 at the tip (other conditions being the same) with various air pressures in the apparatus shown in Fig. 3, Subsequently, the tension σ1o when the film was pulled by 10% was measured using a commercially available tension tester.

Each nozzle was provided between the 10th and 20th la.

The results are shown in FIG. As is clear from this figure, the tension σ□ is higher when the yarn processing nozzle of the present invention is used.

It can be said that a symmetrical and strong loop with few spots is formed.

In the figure, the circle mark indicates the nozzle of the present invention, and the mark indicates a nozzle without the space 20.

The test conditions are as follows. Test conditions Material: Polyester multifilament yarn (15/4
8f) Processing speed: 400m/rrvn (20th-ra) ■-
V Overfeed: 1,000 25% (''■1xlQQ)
σ1o is the thread tension when 10% tension is applied between the 20th and 30th la (?x I QQ).

V□, V2. V3 is the 10th-ra R1, the 20th-ra R2,
30th - Hail the surface speed of R3.

The present invention has the remarkable ability to guide the multifilament yarn to the boundary with the best fluid disturbance ability, and to process the yarn with uniform and strong loops with few spots at high speed and with a small fluid flow rate. It has a great effect.

[Brief explanation of the drawing]

The figures relate to the present invention; FIG. 1 is a longitudinal cross-sectional view of a yarn processing nozzle according to the present invention, and FIG. 2 is an enlarged longitudinal cross-sectional view of the vicinity of the needle portion. Figure 3 is a schematic side view of the test device, Figure 4 is the thread tension σ1o
It is a graph showing the relationship between and air pressure. 3... Fluid injection hole, 6... Conical side surface on the yarn exit side, 15... Conical side surface on the yarn inlet side,
16... Thread entrance passage, 19... Throttle section.

Claims (1)

[Scope of utility model registration request] A space formed by two conical side surfaces arranged concentrically with a small distance from each other, at least one fluid injection hole opened at the bottom of the space, and at the top of the conical side surface on the yarn exit side. In a yarn processing nozzle configured to include a yarn exit passage that opens and a yarn entrance passage that opens at the top of the conical side surface on the yarn entrance side, the yarn entrance passage is not divided and the conical side surface A yarn processing nozzle characterized in that a sole ridged portion 19 eccentric to the central axis of the yarn inlet passage 16 is provided within the yarn inlet passage 16 with a cylindrical space 20 at the tip thereof. .