JPS6038696Y2 - Bulky processing nozzle - Google Patents

Description

[Detailed description of the invention] The present invention relates to a bulky processing nozzle used for texturing multifilament yarn, and is suitable for efficiently and uniformly imparting loops and entanglements to multifilament yarn. Regarding processing nozzles.

Conventionally, devices for imparting loops or entanglements to multifilament yarns have been used to disrupt the flow of air or compressible fluid by quickly ejecting it from a restricted space, as seen in Japanese Patent Publication No. 35-1673. Bulking nozzles are widely known which create a zone and feed the multifilament yarn to be treated into this stream to open it into individual filaments and impart loops and entanglements.

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

However, according to these conventional bulk 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 weak, resulting in disadvantages such as the loops and entanglements that are formed being easy to unravel. It has been difficult to efficiently produce bulky yarn.

An object of the present invention is to provide a bulky processing nozzle that is different from conventional bulky processing nozzles and is suitable for efficiently and quickly imparting strong loops and entanglements.

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 bulk processing nozzle configured to include a yarn exit passage that opens at the top of the conical side surface and a yarn inlet passage that opens at the top of the conical side surface on the yarn inlet side, the only constricted portion is located at the yarn inlet. A main passage 16' is provided in the yarn entrance passage leaving a cylindrical space 20 at the tip of the passage, and is connected to the guide 17 of the yarn entrance passage 16. This is a bulky processing nozzle characterized by being eccentrically provided on almost opposite sides.

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

FIG. 1 is a longitudinal sectional view of a bulk 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 opening at the bottom of the space 22 for introducing compressed fluid into the hole 2.

In order to increase the difference in flow velocity of the fluid passing through the space 22, the second
It is preferable to make the fluid injection hole 3 inclined as shown in the figure.

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

A thread exit passage 5 is provided in the center of the member 7 fitted on the thread exit side of the hole 2 of the housing 1, and the thread exit passage 5 has a thin cylindrical narrow portion 27 on the thread exit side. It opens in the conical side surface 6 on the yarn exit side, and gradually widens toward the yarn exit side (leftward in the drawing).

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 yarn obtained by increasing the velocity of the flow ejected from the girder and 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 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 in the figure it is molded integrally with the peripheral part 9 of the member 7, it is not limited to being separately formed.

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.
5.

Concentrically arranged conical side surfaces 6 and 15 are arranged with a slight gap between them, forming a space 22.

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

The main passage 16' which is connected to the guide 17 of the yarn entrance passage 16 is
It is provided eccentrically with respect to the yarn exit passage in the needled part 14 on the opposite side to the fluid injection hole 3.

The yarn entrance passage 16 has a cylindrical space 20 and a constricted portion 19 at its tip.

The eccentricity β between the yarn exit passage 5 and the main passage 16' of the yarn entrance passage 16 connected to the guide 17 is preferably 0.02 to 0.4 times the maximum inner diameter of the cylindrical space 20.

Note that the reason why the fiber is eccentrically placed on the opposite side of the fluid injection hole 3 is to further enhance the fiber opening disturbance effect.

The inner diameter of the portion 16' of the thread inlet passage 16 is a cylindrical space 20.
must be smaller than the maximum inner diameter of

The inner diameter of the aperture hole 19' of the aperture part 19 is preferably 0.2 to 0.8 times the inner diameter of the portion 16', and the aperture part 19 is located slightly inside the tip of the second part 14 to form a space 20. The distance 1 from the tip of the needle part 14 to the constricted part 19 is preferably 1 to 2 times the maximum inner diameter of the space 20.

Further, it is preferable that the throttle hole 19' is positioned eccentrically with respect to the yarn exit passage 5.

Preferably, the aperture hole 19' is provided concentrically with respect to the portion 16'.

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

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. In contrast, when the fluid injection hole 3 is provided at the top as shown in the figure, the vortex 26 at the top is larger than the turbulent flow 25 at the bottom, and therefore the boundary part is a fluid injection hole. It is biased to the side opposite to hole 3.

This boundary portion has the greatest opening disturbance ability.

Therefore, in order to efficiently disturb the multifilament yarn, it is preferable to guide the yarn along the boundary portion.

17 is a guide, 18 is a mounting screw hole, 23 is a bottom, 24
is a cylindrical part.

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

One or more multifilament yarns (not shown) are fed in an overfeed state from the right end guide 17 to a portion 16' of the yarn inlet passage 16 provided eccentrically on the opposite side of the fluid injection hole 3, and are It reaches the section 19 and is supplied to the cylindrical space 20.

At this time, one or more multifilament yarns exiting the constriction section 19 are instantaneously opened and disturbed, resulting in misalignment between individual filaments, forming loops, and entangled yarns passing through the yarn exit passage. 5 and is 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, when the yarn processing nozzle of the present invention is used, the tension σ1° is greater, and therefore it can be said that a symmetrical and strong loop with less unevenness 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 (150d/
48f) Machining speed: 400m, /min (20th-ra) ■-
■ Overfeed: 1,25% (〒X100) Furthermore, σ1
o is the thread tension when 10% V-■ is pulled between the 20th and 30th la (3V32X100).

■1. V2. ■3 is 10th-Ra R1, 20th-Ra R2
, 30th - Show the surface speed of R3.

The present invention has the remarkable effect of guiding the multifilament yarn to the position where the fluid disturbance ability is greatest, and making it possible to process yarn with uniform and strong loops with little unevenness at high speed with a small fluid flow rate. It is played.

[Brief explanation of drawings]

The figures relate to the present invention; FIG. 1 is a vertical cross-sectional view of a bulky processing nozzle according to the present invention, and FIG. 2 is an enlarged vertical 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 gap between them, at least one fluid injection hole opened at the bottom of the space, and at the top of the conical side on the yarn exit side. In a bulk processing nozzle that includes 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 only constriction part has a space 20 at the tip of the yarn entrance passage. A main passage 16', which is provided in the yarn entrance passage and is connected to the guide 17 of the yarn entrance passage 16, is eccentrically provided on a side substantially opposite to the fluid injection hole with respect to the yarn exit passage. A nozzle for bulk processing featuring the following.