JPS62177250A - Air interlacing nozzle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a nozzle for fluid processing of yarn. The object of the present invention is to form a loop in the yarn using fluid, that is, air, or to simultaneously form an interlock.
In addition, it is an object of the present invention to provide a nozzle which is stable at high speed and has a fluid efficiency of 2 tons in terms of formation.

(Prior Art) A technique for forming a loop in a yarn, or a nozzle, is generally called taslan processing or taslan processing and has been known for a long time. This loop forming nozzle can be roughly divided into two types.

One is a type in which fluid acts on the yarn from the surroundings within the yarn guide hole. Japanese Patent Publication No. 52-21446-Sho 56-12342
9th grade belongs to this type. This type of nozzle has a complicated nozzle structure and requires complicated adjustments in practical use. Therefore, during production, the nozzle is likely to cause variations and unevenness between the spindles. In addition, the yarn shape produced is excellent for loops, but there is almost no interlock.
It is characterized by very poor production. The other type is a type in which the high-speed flow from the nozzle hole acts directly on the yarn within the yarn guide hole, and is disclosed in Japanese Patent Application Laid-Open No. 54-68436 and 54-68436.
8-104239 belongs to this category. This type has a simple nozzle structure, does not require adjustment in practical use, is easy to handle, and has high stability between spindles. In addition, the yarn form that is produced is strong and has interlocks as well as loops. This type of nozzle is particularly effective when processing non-twisted yarn with sindartaslan. In other words, the generated loops generally unravel when tension is applied to the yarn and tend to approach the yarn form before processing, but the yarns generated with this type have strong interlocks and very few loops fall out. The nozzle of the present invention belongs to this type.

(Problem to be solved by the invention) In general, there are many ways to make loop formation stable and efficient at high speed, but what is extremely important is how the conditions should be during loop formation. The following three points are essential requirements. Loop formation is generally performed immediately after or after exiting the thread guide hole. The requirements at this time are: ■ The fluid acting on the yarn must have a high energy density. ■ The yarn must maintain a stable position within the yarn guide hole and at the exit of the yarn guide hole. ■ The yarn must not be twisted (false twisted) or extremely twisted. This is not uncommon.

A simple way to increase the energy density of a fluid is to increase the source pressure of the fluid used, but this is not an excellent method when fluid efficiency is an issue, and it also increases production costs. This is not a desirable thing. Higher speed under the same conditions such as the same amount of fluid used and the same pressure, or thicker denier (
It is important to be able to generate loops of monofilament yarns.

Therefore, the fluid that acts on the yarn must have a higher energy density and be selective, and the nozzle must be devised to achieve this. Further, a general fluid nozzle has a property that when a yarn is guided, it is easily twisted (false-twisted). Twisting is an extremely inconvenient phenomenon in taslan processing and loop generation. At the same time, in terms of fluid efficiency, part of the inflow energy is consumed in twisting, which is undesirable. Rough twisting of the yarn is a phenomenon in which the yarn position within the yarn guide hole is unstable and constantly changes its position. This means that even if there is a strong or weak flow in the flow within the thread guiding hole, the thread is subjected to the effect of the averaged energy, which does not provide good fluid efficiency. Therefore, it is important that the position of the yarn is stable (constant) within the yarn guiding hole, that the yarn is not twisted, and that it is constantly subjected to the action of a powerful fluid. On the other hand, as a nozzle, it is essential to achieve all of these events simultaneously in a certain individual.

The present invention has been made as a result of careful consideration of such event requirements, and as a result has achieved a nozzle that is stable at high speed and has excellent fluid efficiency.

(Means for solving the problem) Figure 1 schematically shows the nozzle structure of the present invention.
A) is a front view, and (B) is a side sectional view. 1 is the thread guide hole, and L+ and Lz indicate the front path length and rear path length, respectively.

Further, A and B indicate the width and height of the cross section of the thread guide hole. 2 is a nozzle hole, D is its diameter and 0 is the injection angle. 3 is a thread, which enters from the entrance of the thread guide hole and exits from the exit of the thread guide hole, as shown in the figure. Loop generation is performed at or near the exit of the thread guide hole. The fluid enters through the nozzle hole and flows mainly in front of the thread guide hole, and the liquid flows out from the rear.

The main features of the nozzle of the present invention are as follows. One is that the thread guide hole has a rectangular shape and its width is smaller than the nozzle hole diameter. This is an extremely unique structure not found in conventional nozzles. The second method is how to take out the yarn from the exit of the yarn guide hole. In the conventional nozzle, the yarn was taken out by bending the yarn path from the outlet of the yarn guide hole as shown in FIG. In other words, conventional nozzles have been able to generate loops by bending the yarn path. In the nozzle of the present invention, it is possible to perform not only the conventional "bending removal 1" but also the windsock removal 1 which takes out the yarn without bending it, and sufficient loop generation can be achieved. It shows that it is durable, stable, and has excellent fluid efficiency.

This shows that not only are the single fibers or threads thin, but also thick fibers, which are conventionally difficult to form, have a strong loop forming ability, and their performance is dramatic. Three are features related to production equipment or processes. The nozzle of the present invention has the advantage that the yarn path can be placed on the line, and that the equipment can be made compact and the operation can be simplified. The fourth is the way the fluid flows. In the nozzle of the present invention, a powerful fluid with high energy density constantly flows through the front path length 7 (the "LA" side in Figure 1 (a+). In other words, the nozzle of the present invention has the feature that the yarn path of the yarn is constant, and the phenomenon or property that the yarn is not twisted (false twist) or is difficult to twist. It appears as.

In addition, since the thread path is constant, the nozzle of the present invention not only has excellent fluid efficiency but also has a strong loop generation ability.

These features or phenomena are closely related to the nozzle structure and are brought about as the sum of each structural factor. The nozzle structure of the present invention and the involvement of structural factors will be described below.

First, the sizes of the thread guide holes and nozzle holes will be explained.

The width of the thread guiding hole is smaller than the nozzle hole diameter, and if its cross-sectional area is 8 tl-SD, then (Sd/8o) is 1.3
~2.0 is appropriate. Roughly detailed [7] When the area outside the nozzle hole cross-sectional area and the thread guide hole width is 8, (8
/SD) is preferably 005 to () or 4. At least these two conditions obtain the features and events of the present invention. Nozzle flow is important to obtain quality.

This is important in order to avoid excessive twisting in the yarn and a significant decrease in loop generation ability.

The angle between the thread guide hole and the nozzle hole (spray angle) is preferably 20 to 70 degrees to obtain the above-mentioned features and phenomena. This is achieved due to the relationship between the sizes of the thread guide hole and the nozzle hole as described above, and more specifically, the substantially long path length in front of the thread guide hole is also a relevant structural factor. In particular, the front path length is highly involved. The appropriate region for obtaining the above phenomenon or feature is g, 3 (D/sinθ
) to 15(L)/sin θ). If L+ is too short, the front path length flow is likely to be influenced by the exit of the thread guide hole, and if it is too long, the influence of the wall of the thread guide hole is large and the flow tends to be uniform. The degree of involvement in the latter part is smaller than that in the first part. Usually o, 3 (D/sin θ) ~ 5
0 (D/sinθ). The nozzle of the present invention achieves its features and phenomena as a summation of each structural factor as described above.

FIG. 2 is a cross-sectional shape showing another example of the thread guide hole according to the present invention. In the figure (a), the upper part has an oblique shape, in the figure (b) it has a semicircular shape, and in the figure (C) it has a semicircular shape in the upper and lower parts.

Figure @3 is another example of the nozzle hole according to the present invention, and has a rectangular cross section. In this case as well, it is important that the width A of the thread guide hole is smaller than the length Dw of the nozzle hole in the thread guide hole width direction. In these cases as well, it is important to satisfy the above structural relationship. However, if the nozzle hole is rectangular, Dw=Ll is applicable. Further, although FIG. 4 shows an example of a nozzle in which a widening hole 4 is added to the thread guide hole of the present invention, a nozzle having a fine hole in place of the widening hole may also be used.

(Example) Next, details of the present invention will be explained with reference to Examples and Comparative Examples.

Table 1 summarizes these.

Also, Figure @5 shows an embodiment of loop generation using the nozzle of the present invention. BOlHl are both supply rollers. When the side yarn core yarn is fed at different speeds, both are used at the same time, which is commonly called double taslan processing. In addition, there is only one supply system, and only B+ is used, which is commonly called single taslan processing. B2 is the take-up roller, N
is a nozzle, and W is a water application device. G is a guide,
It is used as shown in the dotted line in the figure when bending. Note that the solid line indicates the case of "1 windswept - 1 takeaway. (3)" is the thread.

The following margin example 1 is a thick denier double taslan material with a "windsock". Examples 2 and 3 are both single taslan processing, with "windsock removal" and "bending fit", respectively, and in these Examples 1 to 3, no twist occurs in the yarn and sufficient loop formation is achieved. be. Comparative Example 1 has a thread guide hole width larger than the nozzle diameter and is not a nozzle of the present invention. With this nozzle, the yarn was often twisted at the entrance of the yarn guide hole, making it difficult to pass the yarn through the nozzle. Comparative example 2 is (Sd/So) = 2
．． 83, which is not the nozzle of the present invention. In this case, the yarn passes through the nozzle, and although there are some loops that are slightly larger, most of the yarn just becomes bulky in the form of a single fiber. Example 4 is a nozzle of the present invention, and has good loop formation. Comparative example 3 is θ
= 80°, the nozzle of the present invention generates some combustion at the inlet of the -4 yarn hole, and has poor loop generation ability, and winds and cuts the yarn around B+ or B20-. As described above, it can be seen that the nozzle of the present invention is excellent.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the nozzle structure of the present invention, in which (a) is a front view and (b) is a side sectional view. 1 is a thread guide hole, and Ll and R2 indicate the front path length and the rear path length, respectively. A and B indicate the width and height of the thread guide hole. 2 is a nozzle hole, and D indicates its diameter. 3 is a thread. FIG. 2 shows another example of the cross section of the thread guide hole according to the present invention, where ta>
(b) has a semicircular shape, and (e) both the upper and lower portions have a semicircular shape. Figure @3 shows another example of the nozzle hole according to the present invention in a rectangular cross section. Dw is the length of the side following the thread guide hole width direction. , FIG. 4 shows another example of the nozzle of the present invention, which has a flared tube (4) at the entrance of the thread guide hole. FIG. 5 is a diagram showing an embodiment of loop generation using the nozzle of the present invention, in which BOlf (+ is a supply roller, R2 is a take-up reroller,
N is a nozzle, G is a guide, and W is a water application device.

Claims (1)

[Claims] In an entangled nozzle consisting of a thread guiding hole having a rectangular cross-sectional shape and a nozzle hole for injecting fluid, the ratio Sd/S_D of the thread guiding hole cross-sectional area Sd to the nozzle hole cross-sectional area S_D is 1.3 to 2.
0, the diameter of the nozzle hole is larger than the width of the thread guide hole, and the jet angle θ of the nozzle hole with respect to the thread guide hole is 20 to 70 degrees.