JPS5912776B2 - Yarn fluid treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn fluid treatment device that sprays a jet of fluid onto a traveling yarn to treat the yarn with fluid.

Among fluid treatment devices for yarn, a device for jetting high-speed fluid onto a running yarn to entangle the constituent single fibers of the yarn with each other is disclosed in Japanese Patent Publication No. 36-12230.
It is well known from publications such as No.

1 and 2 are cross-sectional views showing the structure of the above-mentioned known device.

FIGS. 2a and 2b illustrate the AA cross section in FIG. 1.

As shown in FIGS. 1 and 2, the yarn processing device 1 has a hollow yarn treatment area 2 in a housing 4, and a fluid injection nozzle 3 is opened in the yarn treatment area 2. It has a structure that introduces the jet flow F into the yarn processing area 2.

The running yarn 5 is then sprayed with a jet stream F to entangle the single fibers constituting the running yarn 5 with each other, thereby imparting cohesiveness to the running yarn.

As mentioned above, in conventionally known filamentous fluid treatment devices, the cross-sectional shape in a plane perpendicular to the traveling direction of the filament running in the filament treatment area is circular as shown in Figure 2, or as shown in Figure 3a. The jet F introduced into the yarn treatment area 2 collides with the inner wall 6 surrounding the yarn treatment area, and then flows along the inner wall. It is thought that the vortex is generated by the vortices.

FIGS. 4a and 4b are model diagrams for explaining the generation of the vortices Fa and Fb described above.

In an ideal state, the two vortices Fa and Fb generated in the yarn treatment area by the jet flow introduced into the yarn treatment area 2 by the fluid injection nozzle 3 are symmetrical.

However, in order to maintain this ideal state, the circularity of the cross section of the yarn processing area 2, the eccentricity of the center of the fluid injection nozzle 3 and the yarn processing area 2, the circularity of the fluid injection nozzle 3, etc. must be within a certain range. It is necessary to have an accuracy within

In reality, the above requirements cannot be satisfied, which causes variations in the performance of yarn entanglement processing devices.

For example, as shown in FIG. 2, the presence of threads running in the thread processing area 2 causes disturbance to the jet flow F, and thus Fa and Fb tend to become asymmetrical.

The filament 5 is also a vortex Fa. Since it is moved along the inner wall 6 of the filamentous treatment by Fb, it is given a rotational motion.

Therefore, the yarn is given a false twist, which restricts the movement of the individual single fibers constituting the running yarn, causing a truly inconvenient phenomenon in which these single fibers become intertwined with each other.

As shown in Fig. 3, in the case of an embodiment in which the fluid jet nozzles 3 that open in the thread processing area 2 having a circular cross section are located at opposite positions, the axes of the two facing fluid jet nozzles overlap each other. If they do not match, the above-mentioned disadvantages will become even more pronounced.

As shown in FIGS. 3a and 3b, when the cross-sectional shape of the thread treatment 2 is an ellipse or an ellipse, basically the same phenomenon as described above occurs.

The purpose of the present invention is to eliminate the above-mentioned defects of the prior art, to efficiently apply a jet stream to the traveling yarn without causing false twist to the traveling yarn, and to achieve satisfactory fluid treatment of the yarn with low energy consumption. It is an object of the present invention to provide a novel yarn fluid treatment device.

The present invention has the following configuration to achieve the above object.

That is, the yarn is run through a yarn processing area that is a cavity surrounded by a wall and open at both ends, and fluid is ejected from the wall of the yarn processing area into the yarn processing area through a fluid injection nozzle. In the fluid treatment device for yarn, the yarn treatment area is surrounded by three planes parallel to the traveling direction of the yarn, and the yarn treatment area is surrounded by three planes parallel to the traveling direction of the yarn. A cross section taken along a plane perpendicular to the direction of travel is an isosceles triangle, and a fluid injection nozzle that opens into the yarn processing area is provided at the apex corner sandwiched by the two equilateral sides of the triangle, and the axis of the nozzle is The present invention is characterized by a yarn fluid processing device arranged so as to be perpendicular to the side with respect to the apex angle.

. The present invention will be further explained in detail with reference to the drawings.

FIG. 5 is a cross-sectional view showing the main parts of a yarn fluid treatment device according to an embodiment of the present invention.

In FIG. 5, the yarn processing area 2 consists of a cavity whose cross section is in the form of an isosceles triangle and surrounded by three planes indicated by line segments 5a, 5b, and 5c.

The line segments 6as6b have equal lengths, and a fluid injection nozzle 3 opens at the apex corner between these line segments, and the other end of the fluid injection nozzle 3 is connected to a fluid supply source (not shown). ing.

The running thread 5 is moving in a direction perpendicular to the plane of the paper,
When the jet flow F is supplied from the fluid injection nozzle 3, the jet flow causes the yarn 5 to move onto a plane 6C that forms a part of the inner wall of the yarn processing area 2.
Being pressed down on top.

The jet flow F colliding with the plane 6C of the yarn processing area 2 generates two vortices Fa and Fb.

The running thread 5 is swept along either the left or right side of the plane 6c by the vortex Fa or Fb, moves along the plane 6a or 6b, is caught by the jet flow F, and returns to the plane 6C. The jet F is reliably crossed at a fast cycle while repeating reciprocating motion on the plane 6C in such a manner that it is pressed against the surface of the plane 6C, thereby efficiently intertwining the jet F.

As shown in FIG. 5, the cross section of the thread processing area 2 is made into an isosceles triangle so that the thread pressed against the thread 6C by the jet flow F will be moved left and right with approximately equal probability.

If it is biased to either side, there is an increased chance that the running yarn will undergo false twist in the yarn processing area.

FIG. 6 shows another embodiment of the device according to the present invention, which differs from FIG. 5 in that fluid injection nozzles 3 and 3' are provided facing each other and ejecting fluid.

The jet flow F1 from the fluid injection nozzle 3 is the fluid injection nozzle 3'.
It is stronger than the jet F2 injected from the jet F2.

Therefore, as a result, the running yarn 5 is pressed against the plane 6c, but the degree of pressing is weaker than in the example shown in FIG.

Therefore, there is a degree of freedom in the movement of the threads, and the interlacing effect can be further promoted.

FIG. 7 is a sectional view showing another embodiment of the device according to the present invention.

In FIG. 7, a yarn guiding slit 7 communicating with the outside is provided in the yarn processing area 2.

This slit is provided at a position that coincides with the line of action of the jet stream F.

A jet is always ejected on this line of action, and once the yarn is guided into the light treatment area, it does not fly out to the outside in a steady state, and the flow of the jet in the yarn treatment area is not significantly obstructed. This is taken into consideration.

This slit for guiding the yarn is not necessary when the yarn speed is low, but at a high speed of 500 m/min or more, actual operation becomes extremely difficult without this slit.

FIG. 8 is a longitudinal cross-sectional view of a fluid treatment device according to an embodiment of the present invention.

In the devices illustrated in FIGS. 5 to 7, the axes of the fluid injection nozzles are arranged perpendicularly to the wall surface onto which the fluid is sprayed, but the device according to the present invention is limited to this embodiment. Instead, as shown in FIG. 8, the axis of the fluid jet nozzle 3 may be inclined at an angle θ with respect to the wall surface 6c onto which the fluid jetted from the fluid jet nozzle 3 is sprayed.

Alternatively, θ may be an acute angle or an obtuse angle. In this case, it is sufficient that the projection of the fluid jet nozzle 3 onto a plane perpendicular to the direction in which the thread travels divides the line segment, which is the projection of the wall surface, into three equal parts.

Furthermore, it is also possible to use a plurality of yarn processing and treatment devices having different θ values arranged in series in the yarn traveling direction.

Since the seventh aspect of the present invention has the above configuration, the following effects are achieved.

First, the yarn entanglement processing device according to the present invention arranges three planes so that the cross-sectional shape forms an isosceles triangle,
These planes constitute the inner wall surface of the yarn processing area,
In addition, since a fluid injection nozzle is provided at the apex angle sandwiched by the isosceles, and the jetting direction of the nozzle is orthogonal to the side to the apex angle, the running yarn does not exhibit any rotational action. The degree of freedom of each single fiber constituting the running yarn is not restricted, and entanglement by the jet stream can be carried out without waste.

Secondly, because the cross-section of the yarn processing area is triangular, there is no area for the running yarn to accumulate compared to those with other polygonal cross-sections such as quadrilaterals, and as a result of the running yarn crossing the jet frequently, it becomes entangled. Since this is reliably carried out during a short cycle, the homogeneity of the yarn can be further improved.

In addition to the above-mentioned effects, the device according to the present invention can process yarns with a stronger degree of entanglement with the same amount of energy compared to conventional devices, and with lower energy consumption if the yarn has the same degree of entanglement effect. It has different functions and effects, such as:

Furthermore, if the structure is as shown in Fig. 8, the jet flow itself has a yarn feeding function as well as an entangling effect, so yarn feeding in an overfeed state is possible, and it can also be applied to the production of umbrella-guiding yarns. Become.

Next, examples of the present invention will be described.

The experiment was conducted using the apparatus shown in FIG.

The raw yarn 9 is supplied to the yarn entangling device 1 by a supply roller 10, passes through a take-up roller 11, and is wound up by a winder 12.

Yarn guides 13 and 1 are provided before and after the processing device 1 so that running yarn can be stably supplied to the yarn processing area of the processing device 1.
3' is installed.

Here, the distance between the thread guides 13 and 13' is Lmrn,
shall be.

FIG. 10 is a diagram schematically showing an apparatus for measuring the degree of entanglement described above.

The measurement procedure is as follows: (1) Multifilament yarn 14 is hung on movable pulley 15.

(2) The fixed needle 17 is inserted between the fibers constituting the multifilament yarn 14 substantially at right angles to the yarn axis direction.

(3) Fix the fixed needle 17 in the state of (2) to the wall.

(4) Multifilament yarn・Load 18 on both ends of 14
．． Attach 19.

(5) Attach the auxiliary load 20 to either side of the load 18 or 19.

(6) The scale plate 1 fixed to the wall shows the position of the pointer 21 fixed to the pulley 15 after the thread 14 moves against the fixed needle 17 due to the auxiliary load and the rotation of the movable pulley 15 stops.
6 Read on the scale above.

(7) Next, change the attachment of the auxiliary load 20 to one of the loads.

(8) Similarly to (6), after the movement and rotation have stopped, read the position of the pointer 21 on the scale on the scale plate 16.

The total distance traveled by the thread from the scale read in (6) and the scale read in this section! (CrrL) is obtained and the measurement is completed.

Perform this measurement n times and find the average value CF=10077-
indicates the degree of confounding.

That is, (1) In the case of measuring a yarn that has never been crimped, the load 1B, 19 is the denier number
2) When measuring crimped yarn, the load is 18.
19 is the denier number X O, 4g, and the auxiliary load 20 is (Te'
= 4/number of filaments)g.

FIG. 11 shows a conventional device used to compare the effects of the embodiments of the present invention.

This is a conventional device shown in FIG. 2 with a yarn guiding slit 7 added thereto.

Example 1 Nylon 70 denier, 24 filament, drawn yarn, yarn speed 600 m/min, bulge distance L = 200 mm, tension before entering the nozzle 6 g, supply air pressure 3 kg/crliG 1 Example of the present invention was compared with the conventional device It shows high entangling performance despite the low flow rate.

Example 2 Polyester 150 denier, 48 filaments, false twisted yarn, yarn speed 400 m/min, distance between guides @ L = 30 mm.

The nozzle was filled with 3g of pressure, and the air supply pressure was 3 to 9/iG.

[Brief explanation of the drawing]

Figure 1 shows the main parts of the conventional device, and is a sectional view taken along a plane that includes the line through which the running yarn passes.
Figures a, b and Figures 3 a, b illustrate the AA cross section in Figure 1. FIG. 4 is a model diagram for explaining the behavior of the jet flow introduced into the yarn processing area of the conventional apparatus. FIG. 5, FIG. 6, and FIG. 7 show the main parts of the device according to the present invention, and are illustrative cross-sectional views taken along a plane parallel to the line through which the running yarn passes. FIG. 8 is a longitudinal sectional view showing an example of the device according to the present invention. FIG. 9 is a schematic diagram showing the structure of the experimental apparatus used in the example. FIG. 10 is a schematic diagram showing the structure of a device for measuring the degree of entanglement. FIG. 11 is a cross-sectional view of a conventional device used as a comparative example in the examples, taken along a plane perpendicular to the line through which the running yarn passes. 1: Yarn fluid treatment device, 2: Yarn treatment area, 3: Fluid injection nozzle, 4: Housing, 5: Yarn, 6 Inner wall of two yarn treatment area,
7: Slit for guiding thread. 87-

Claims (1)

[Claims] 1. The yarn is run through a yarn processing area consisting of a cavity surrounded by a wall and open at both ends, and a fluid is ejected from the wall of the yarn processing area into the yarn processing area via a fluid injection nozzle. In a yarn fluid treatment device for treating running yarn, the yarn treatment area is surrounded by three planes parallel to the yarn traveling direction, and the yarn treatment area is surrounded by three planes parallel to the yarn traveling direction. A cross section cut along a vertical plane is an isosceles triangle, and a fluid injection nozzle that opens to the yarn processing area is provided at the apex corner sandwiched by two equilateral sides of the triangle,
A fluid processing device for yarn, characterized in that the axis of the nozzle is arranged to be perpendicular to the side relative to the apex angle.