JPS5911700B2 - Yarn processing method - Google Patents

Description

Detailed Description of the Invention The present invention applies a high-speed fluid in the same direction as the traveling direction of the yarn to the running yarn to give curls, loops, entanglements, etc. to the individual single fibers that make up the yarn, thereby producing a casual high school graduate. This invention relates to a novel yarn processing method for

Conventionally, as a device for obtaining umbrella high school graduation by applying a high-speed fluid to a running thread, Japanese Patent Publication No. 38-2828,
US Pat. No. 3,545,057 and the like are known.

However, these devices do not sufficiently fix the curls and loops formed on individual filaments to the whole thread, and as a result, these loops and curls are removed even when the treated thread is handled under relatively low tension. etc. disappear, so knitted fabrics using these yarns have the disadvantage that they cannot exhibit the expected bulkiness.

Therefore, as a concrete solution to this drawback, a baffle plate is placed at a position opposite to the orifice opening which is the yarn outlet of the above-mentioned yarn processing device, and the yarn is made to collide with the baffle plate together with a high-speed fluid to form yarn. A device designed to strengthen the entanglement between individual single fibers is known, for example, from Japanese Patent Application Laid-Open No. 49-87845.

However, with this device, it has not been possible to obtain yarn that can be used to make knitted fabrics that maintain sufficient bulk.

The purpose of the present invention is to improve the deficiencies of the prior art as described above, and to provide a novel yarn processing method for obtaining an excellent bulky high school graduate that has excellent bulkiness and stably maintains its bulkiness. That is.

In order to achieve the above object, the present invention has the following configuration.

That is, the yarn is applied to a fluid injection nozzle that is equipped with a yarn passage formed by arranging a yarn inlet, a yarn processing chamber, and a yarn outlet in this order, and a fluid introduction part for introducing pressurized fluid into the yarn treatment chamber. A pressurized fluid is simultaneously supplied to eject the yarn together with the high-speed fluid from the yarn outlet of the fluid injection nozzle, and while forming a bending point in the yarn, the yarn is taken up in a direction approximately perpendicular to the flow of the high-speed fluid and placed under the umbrella. In the yarn processing method for high school graduates, a fixed guide is installed near the bending point of the yarn facing the end face of the fluid jet nozzle and close to the yarn outlet without covering the opening of the yarn outlet, The surface facing the nozzle end surface is used as a thread guide surface, and the thread guide surface guides the thread ejected from the thread outlet and passed through a bent state, so that the eye light is drawn in a direction approximately perpendicular to the flow of the high-speed fluid. This yarn processing method is characterized by the following.

The present invention will be described in detail below using the drawings.

FIG. 1 is a sectional view showing an example of a yarn processing device applied to the present invention, and FIG. 2 is a partially enlarged view of FIG. 1.

1 and 2, a yarn processing device A applied to the present invention has a fluid jet nozzle B and a fixed guide 12 as its main parts.

The fluid injection nozzle B has a nozzle body 1. It consists of a needle 4 and a fluid introduction tube 9.

A needle 4 having an elongated hole 3 is inserted into the cavity 24 of the nozzle body 1 with the thread entrance 2 on the outside, and the end of the needle is connected to a tapered part at the back of the cavity 24 of the nozzle body 1. It faces the throat part 5 with a space therebetween.

A portion of this taper forms a yarn processing chamber 8.

Continuing from one throat portion 5, a trumpet-shaped orifice 6 serving as a yarn outlet opens into a nozzle end face 7.

On the other hand, the nozzle body 1 has a fluid inlet pipe 9 which communicates with the cavity 24 at the outer periphery of the needle 4 for introducing pressurized fluid into the yarn processing chamber 8.
is attached, and the pressurized fluid supplied from this fluid introduction pipe is supplied to the yarn processing chamber 8 at high speed through the fluid hole 10 of the needle 4.

On the other hand, the fixed guide 12 is disposed facing the nozzle end face 7 without covering the opening of the orifice 6.

When the device is now supplied with pressurized fluid and the thread 11 is fed through the thread inlet 2, the eye light is guided through the elongated hole 3 of the needle 4 into the thread processing chamber 8.

The behavior of the yarn 11 received in the yarn processing chamber 8 is that it comes into contact with a high-speed fluid that is introduced from the fluid introduction tube 9, passes through the fluid hole 10, and flows in an annular shape, and the single fibers constituting the yarn 11 are opened by the action of the fluid. The fluid is ejected to the outside through the orifice 6 while being disturbed and agitated, along with high-speed fluid.

The treated yarn ejected together with this high-speed fluid is pulled out along the fixed guide 12 in a direction perpendicular to the ejected flow, and the pulled out yarn is taken up by a known take-off device (not shown).

In this process, the yarn changes direction at the bending point 13.
will occur.

In the vicinity of this bending point 13, the yarn generates vibrations with a very short period, and as a result, these vibrations give many loops and curls to the single fibers that make up the yarn, and strengthen them to prevent them from collapsing. (It is thought that Casa High School graduates with excellent stability can be obtained because of the intertwining.

The fluid injection nozzle used in the present invention is not limited to the structure shown in FIG. 1, but any fluid injection nozzle having a structure that applies high-speed fluid to the running yarn and ejects the yarn together with the high-speed fluid can be used effectively. Can be used.

FIG. 3 is a sectional view of a fluid injection nozzle having a structure different from that shown in FIG. 2, and the difference from that shown in FIG.
The point is that the pressurized fluid supplied to the needle 4 is configured to be supplied almost uniformly from the outer periphery of the needle 4.

This structure can be used to implement the present invention in the same way as the one shown in FIG.

The characteristics of the present invention are as follows:
In contrast, the jammer plates known in Japanese Patent Application Laid-open No. 50-160547 cover the area including the upper part of the jet of high-speed fluid. The thread is brought into contact with the fixed guide 12 in a free state near the bending point, is bent there, and the single fibers constituting the thread are moved freely and vigorously near this bending point. .

As a result, as shown later, an even stronger loop,
Crimp, entanglement, etc. are added to the thread.

The fixed guide 12 used in the present invention has the bending point 13
The thread 11 separates from the flow of the high-speed fluid in the vicinity of and moves along the thread guide surface 14 of the fixed guide 12 in a direction perpendicular to the direction of the flow of the high-speed fluid, that is, in a direction parallel to the nozzle end surface 7. It is arranged as follows.

FIG. 4 shows an example of the shape of the fixed guide 12, with A showing a front view and B showing a cross section along the line X-Ga.

In FIG. 4, reference numeral 1 has the simplest shape, and it is actually fixed with a gap between it and the nozzle end surface 7 to allow the thread 11 to pass through.

Therefore, when the fixed guide 12 of this embodiment is used, it is possible to prevent the thread from moving along with it in the direction of the fluid flow, but it is relatively unstable on the nozzle end face 7.

In order to improve this point, if grooves 15 are provided as shown in ii and iii, the running of the thread 11 will be further stabilized.

In addition, a structure such as 111 (in which the arm 16 protrudes in front of the groove 15) provides even better stability.

As shown in FIG. 4, the thread guide surface 14 of the fixed guide 12
is finished with a suitable curved surface so that the thread 11 can be pulled out smoothly without resistance, and its surface roughness is determined by the type of thread to be processed, the material of the guide, etc.

Furthermore, since the portion of the fixed guide 12 that comes into contact with the yarn 11 is small, the portion that comes into contact with the yarn may be subjected to surface hardening treatment, or that portion may be made of a wear-resistant material (for example, ceramics, cemented carbide, etc.). It can also be made into a shape that allows for partial replacement.

FIG. 5 is a perspective view showing an example of a yarn processing device applied to the present invention.

In the device shown in FIG. 5, the fixed guide 12 is movable in the direction perpendicular to and parallel to the end face of the jet nozzle in the yarn processing device.

The fixed guide 12 is slidable in the longitudinal direction of the bar 17 and is fixed by a set screw 18.

The bar 19 is slidable on the block 21 by a screw mechanism with the feed ring 20, and the bar 19 is located at the same position as the ring 200.
It is determined by the rotation angle and is rotatable about its own central axis Y as the rotation center.

The fixing screw 22 is for fixing the bar 19 to the block 21.

The block 21 is fixed to a block 23 fixed to the nozzle body 1 of the fluid injection nozzle of the yarn processing device so as to be movable in the flow direction of the high-speed fluid injected from the orifice 6.

When threading, the fixed guide 12 is moved around the central axis Y of the bar 19 to the end surface 7 of the fluid jet nozzle in the thread processing device.
The position is then fixed using the fixing screw 22.

After threading the fluid jet nozzle B, the fixing screw 22 is loosened, and the bar 17 is rotated in the opposite direction to that described above so that it is approximately parallel to the end surface 7 of the fluid jet nozzle.

The position of the fixed guide 12 with respect to the yarn traveling direction can be adjusted by rotating the feed ring 200, and the fixed guide 12 can be adjusted in a direction parallel to the nozzle end surface 7 and perpendicular to the yarn traveling direction.
This is possible by sliding it along the bar 17 and by using the set screw 18.

After the optimum position for yarn processing with respect to the nozzle end surface 7 of the fixed guide 12 is determined, the position of the fixed guide 12 is fixed by the fixing screw 22 and the set screw 18.

Further, the pressurized fluid used in the present invention is usually compressed air at room temperature.

However, don't limit yourself to this (other gases can also be used effectively).

Thermoplastic threads are used, and in order to increase the bulk and stability of the fabric, heated compressed air or steam, as well as air containing water droplets, is used.

In this case, water droplets may be added during the process of supplying the compressed air, or wet yarn may be supplied.

Examples will be described below.

Example 1 The yarn processing device is the one shown in Fig. 1 (needle diameter 0.51 mm, throat 5 diameter 1.78 mm, orifice 60 exit diameter 2.5 mm).
-1 fluid hole 10 diameter of 2.78 mm) was used.

The fixed guide 12 used is of the form shown in FIG. 4 111, and the arm 16 has a height of 1.5# and a length of 2. Oyrm, groove 15 width 1.0mm, depth 0.5rIr! Using the one from IL,
The origin is when the line connecting both ends of the arm 16 touches the circumference of the opening at the nozzle end face of the orifice 6, and the fixed guide 12
The direction away from the opening edge of the orifice 6 of the yarn processing device was defined as the (+) side, and the fixed guide was moved in Xtran to perform yarn processing.

Measure the tension when the resulting yarn is wound back at a constant speed,
As a result, the graph shown in FIG. 6 was obtained.

The fluid used is compressed air, which is 5 Kyla! A polyester yarn having a pressure of 1507' and 72 filaments was fed from a supply roller to a yarn processing device at a speed of 300 m/min while spraying water droplets onto the yarn.
The thread is taken up by a take-up roller at a speed of 237 m/min.
It was wound up at a speed of n, and the tension of this winding was measured.

The obtained results are shown as a graph in FIG.

The reason why the tension fluctuates over a seven constant range in the graph is due to the traverse motion during winding.

Note that the tension when the fixed guide 12 was not used was 10 g or less.

Also, when X (-1.5rrvn), the yarn could not be blown up.

In this example, it was found that there was a peak near X = 0.5 am.

A high winding tension indicates that the loops and slack in the treated yarn are stable.

Example 2 Using the yarn processing device of Example 1, the compressed air was 6 Kg/cA (G)
Stapling yarn, supply, and take-up 2 winding conditions are the same, fixed guide 1
The two shapes were compared.

As a result, the winding tension shown in Table 1 was obtained.

However, in Example 1, X = 0.5 rran.

At X=0 of the fixed guide No. 1, the circumference of the opening of the orifice 6 and the projection of the tip of the fixed guide 12 onto the nozzle end surface were in contact with each other.

Example 3 Using the apparatus of Example 1, no fixed guide, 111 fixed guide (X = 0.5 rrvn) and JP-A-4
A comparative experiment was conducted on three types of baffle plates that cover the entire opening surface of an orifice shown in Nos. 9-87845.

The experimental conditions were the same as in Example 2, but in this example, the yarn was processed by adjusting the winding speed so that the winding tension was 11 to 15 g = constant swing width.

The processed thread is commercially available in Mo by Fluff Counter (Toshiku Co., Ltd.).
del DT-104 type) was run under a tension of 20 g and a tension of 50 g, and the number of fuzz present in a certain length was measured.

The number of fuzz counted by the fuzz counter is crimps and curls.

and is proportional to the number of loops.

The experimental results are shown in Table 2, assuming that the number of fuzz is 100 when the yarn is processed under a tension of 20 g without a fixed guide.

As is clear from the results of this experiment (it can be seen that the one using the fixed guide has more fuzz, that is, more loops and slack, than the one using the jammer plate).

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a device applied to the present invention, and FIG. 2 is a partially enlarged view of FIG. 1. FIG. 3 is a cross-sectional view illustrating a device applied to the present invention using a fluid ejection nozzle having a structure different from that in FIG. 1. FIG. 4 is a front view and a sectional view illustrating the shape of a fixed guide used in the present invention. FIG. 5 is a perspective view showing an example of a device applied to the present invention. FIG. 6 is a graph showing the relationship between the position of the fixed guide and the properties of the treated yarn. A: Yarn processing device, B: Fluid injection nozzle, 1: Nozzle body, 2: Yarn inlet, 6: Orifice, 7: Nozzle end face, 8:
Yarn processing chamber, 11: yarn, 12: fixed guide, 14: yarn guide surface.

Claims (1)

[Claims] 1. Yarn and pressure are applied to a fluid injection nozzle equipped with a yarn passage formed by arranging a yarn inlet, a yarn processing chamber, and a yarn outlet in this order, and a fluid introduction part for introducing pressurized fluid into the yarn treatment chamber. The fluid is simultaneously supplied and the yarn is ejected from the yarn outlet of the fluid injection nozzle along with the high-speed fluid, and while forming a bending point in the yarn, the yarn is pulled in a direction almost perpendicular to the flow of the high-speed fluid. In the yarn processing method, a fixed guide is installed near the bending point of the yarn facing the end face of the fluid injection nozzle and close to the yarn outlet without covering the opening of the yarn outlet, and the nozzle of the fixed guide The surface facing the end surface is used as a thread guide surface, and the thread that is ejected from the thread outlet and has passed through a bent state is guided by the thread guide surface, so that the eye light is drawn in a direction approximately perpendicular to the flow of the high-speed fluid. A yarn processing method characterized by: