JPS6235496B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid processing device that increases the bulk of a yarn, which is an aggregate of a large number of single fibers, by exposing it to the agitation effect of a fluid.

It is a well-known technique to increase the bulk of the yarn as a whole by forming loops or entanglements in single fibers through a disturbance action in a fluid turbulence region, and many methods and devices for this purpose have been proposed.

A typical device is disclosed, for example, in Japanese Patent Publication No. 38-2828.

According to the publication, the yarn enters the nozzle body from the yarn inlet (mouth) at one end of the nozzle body (housing) through the threading part of a pipe-shaped yarn needle facing the center, and is also pressurized. The fluid enters the nozzle body through the fluid inlet (conduit) located approximately at the center of the nozzle body at right angles to the nozzle body, and advances while wrapping the threading section of the yarn needle from all sides, and enters the yarn processing section (disturbance zone). Arrive. An example of a device is disclosed in which yarn and fluid are ejected through a yarn outlet (outlet conduit) of a nozzle body (orifice block) to generate a large number of loops. Such conventional devices have the disadvantage that a large number of loops are generated and the speed at which the yarn is bulked is too slow to bulk up the yarn on an industrial scale.

Conventionally, as a device to compensate for this drawback, for example, a device that makes the threading part and the yarn processing part of the yarn needle eccentric (Japanese Patent Publication No. 44-6158), or a device that attaches an edge to the fluid passage surface at the tip of the yarn needle, A device (US Pat. No. 3,545,057) has been proposed in which a fluid passage is restricted by this edge portion.

However, although these devices can achieve a certain degree of improvement in the speed of bulking the yarn compared to conventional methods, it is not necessarily sufficient to increase the speed even higher from an industrial standpoint.

Furthermore, the occurrence of loops in the longitudinal direction of the yarn was uneven, and coarse loops were produced, making it impossible to expect a knitted fabric of high quality.

The present invention aims to solve the drawbacks of these conventional devices.

That is, the first object of the present invention is to provide a fluid treatment device that can generate loops in threads at an extremely high speed and with extremely high fluid utilization efficiency compared to conventional devices, thereby imparting bulkiness to the yarn. It is in.

Furthermore, the second object of the present invention is to provide a bulky yarn in which loops occur extremely uniformly in the length direction of the yarn, and furthermore, the sizes of the generated loops are made extremely uniform, thereby making it possible to produce a high-quality knitted fabric. An object of the present invention is to provide a fluid treatment device capable of manufacturing.

These objects of the present invention include a yarn inlet, a yarn processing section,
It consists of a yarn passage formed by arranging yarn outlets in this order and a fluid injection nozzle equipped with a fluid introduction part for introducing pressurized fluid into the yarn processing part, and the yarn passing through the yarn passage is pressurized. In a fluid treatment device for bulking yarn by applying fluid, a fluid is formed on a nozzle end surface on the yarn exit side of the fluid jet nozzle, with one end connected to the yarn exit and the other end extending to the outer periphery of the nozzle end surface. This is accomplished by a processing device.

Next, the present invention will be explained in detail with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 is a longitudinal sectional view of a fluid treatment device according to the present invention. FIG. 2 is a front view of FIG. 1. Third
The figure is a side view of FIG. 1. FIG. 4 is a partially enlarged view showing the state of the yarn near the yarn exit in FIG. 1. In FIGS. 1 to 3, the fluid injection nozzle consists of a nozzle body 21, a yarn needle 22, and a fluid inlet 27.

A yarn needle 22 having an elongated threading hole 25 is inserted into the cavity 26 of the nozzle body 21 with the yarn entrance 23 on the outside, and the end of the yarn needle is inserted into the tapered part at the back of the cavity 26 of the nozzle body 21. It faces the throat portion 29 provided continuously with a distance therebetween. The space between this tapered part and the tip of the yarn needle 22 is the yarn processing section 2.
It is 8. Continuing from the throat portion 29, an open-ended yarn outlet 24 opens into the nozzle end face 31.

The nozzle body 21 is provided with a fluid introduction port 27 that connects with the cavity 26.
The pressurized fluid supplied from 7 passes through the cavity 26 and reaches the yarn processing section 28.

In such a fluid injection nozzle, the yarn guide groove 30, which is a feature of the present invention, is formed as a groove on the nozzle end surface 31 on the yarn exit side, one end of which is connected to the yarn exit 24, and the other end of which extends to the outer periphery of the nozzle end surface 31. It is provided. Now, when pressurized fluid is supplied to this fluid processing device and yarn is supplied from the yarn inlet 23, the yarn passes through the elongated threading hole 25 of the yarn needle 22 and is guided to the yarn processing section 28. Yarn 3 received by yarn processing section 28
3. When the fluid comes in contact with the pressurized fluid introduced from the fluid inlet 27, the single fibers constituting the yarn are opened and agitated by the turbulent action of the fluid, passing through the throat 29 and flowing with high-speed fluid from the yarn outlet 24. It is ejected with.

The yarn ejected together with this high-speed fluid flows into the yarn guide groove 3.
The jet stream is drawn out along the direction perpendicular to the jet stream. In this process a bending point 32 is created as the thread changes direction. In the vicinity of this bending point 32, the yarn generates vibrations with a very short period, and this vibration results in many loops and entanglements in the single fibers constituting the yarn, resulting in a bulky yarn. In addition, as mentioned above, the yarn ejected from the nozzle is connected to the yarn guide groove 30.
When using the fluid ejecting device of the present invention to feed the yarn along the nozzle exit, it is preferable to provide a yarn guide (not shown) in the extending direction of the yarn guide groove 30 to regulate the yarn path after the nozzle exit. In the vicinity of the bending point 32 the thread exhibits a rooster tail shape. Stabilizing the shape and position of the rooster tail of the yarn in the vicinity of the bending point 32 provides many loops and entanglements, makes it strong, and also allows the loops to occur uniformly in the lengthwise direction of the yarn. This is effective in producing bulky yarn with less unevenness in size.
Conventional fluid injection nozzles are insufficient in forming strong loops due to variations in the shape and position of the rooster tail, in forming loops uniformly in the length direction, and in making the loops uniform in size. It was hot. On the other hand, in the present invention, by providing a yarn guide groove on the nozzle end face on the yarn exit side of the fluid injection nozzle, it is possible to extremely minimize fluctuations in the shape and position of the rooster tail of the yarn near the bending point. It is possible to generate loops and entanglements in the yarn with extremely high fluid utilization efficiency compared to conventional devices, and to impart bulkiness to the yarn at an extremely high speed. Furthermore, loops are generated extremely uniformly in the length direction of the yarn, and a bulky yarn in which the size of the generated loops is extremely uniform can be obtained.

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

Although FIG. 3 shows a thread guide groove having a semicircular cross section, the present invention is not limited to this. U-shaped, V
It may also indicate a cross-sectional shape such as a character shape.

The apparatus of the present invention can be used to add loops to yarns made of filaments or staples of any natural or regenerated or semi-synthetic or synthetic fibers and to bulk them up.
Furthermore, the device of the present invention can be used regardless of the cross-sectional shape of the single fiber and the fineness of the single fiber, and can be used without being limited to the fineness of the filament yarn or the count of the spun yarn.

The fluid used in the apparatus of the present invention is generally air or saturated steam, but is not limited thereto.

When using the apparatus of the invention, yarn is over-fed into the apparatus, the rate of over-feed depending on the properties of the yarn being processed and the quality of the product obtained. When providing bulkiness by combining two or more types of yarns, it is also possible to process an arbitrary number of yarns by supplying the remaining yarns in excess.

Example 1 The diameter of the tip of the threading hole of the yarn needle is
0.5mmφ, throat diameter 1.8mmφ, thread exit diameter
The first one is 2.4mmφ and the thread guide groove (semicircular shape) is 1.0mmφ.
A polyester filament yarn of 150 denier and 60 filaments was processed using the apparatus of the present invention shown in Figures 2 and 3 and, for comparison, an apparatus having the same dimensions as the apparatus of the present invention, except that no yarn guide groove was present. A bulky yarn with many loops was obtained.

At this time, the fluid is 4.0Kg/cm ² (G) 138N/min
The filament yarn was thoroughly watered using compressed air before processing.

At this time, the device of the present invention having a thread guide groove is 281
When the filament yarn was fed into the device at a speed of m/min and the bulky yarn was taken out from the device at a speed of 225 m/min, a bulky yarn with strong loops and entanglements and excellent bulk and uniformity was obtained. I was able to do that. On the other hand, in a device without a yarn guide groove, in order to obtain a bulky yarn that has the same strong loops and entanglements and excellent bulkiness as the device of the present invention which has a yarn guide groove, it is necessary to The filament yarn is fed into the device at a speed of 108 min, and the bulky yarn is delivered from the device at a speed of 108 min.
It had to be removed at a speed of m/min. Furthermore, the uniformity of the yarn was inferior to that of the bulky yarn obtained using the apparatus of the present invention having a yarn guide groove. In addition
The bulkiness of the bulky yarn obtained when the filament yarn is fed into the device at a speed of 135 m/min or higher is:
The bulkiness was extremely inferior to that of the bulky yarn obtained with the apparatus of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a fluid treatment device according to the present invention. FIG. 2 is a front view of FIG. 1. Third
The figure is a side view of FIG. 1. FIG. 4 is a partially enlarged view showing the state of the yarn near the yarn exit in FIG. 1. 21: Nozzle body, 22: Yarn needle, 2
3: Thread inlet, 24: Thread outlet, 25: Threading hole, 2
6: Cavity part, 27: Fluid introduction port, 28: Yarn processing part, 29: Throat part, 30: Yarn guide groove, 31: Nozzle end face, 32: Bend point (Rooster tail), 3
3: Thread.

Claims (1)

[Claims] 1 Consists of a yarn passage formed by arranging a yarn inlet, a yarn processing section, and a yarn exit in this order, and a fluid injection nozzle equipped with a fluid introduction section for introducing pressurized fluid into the yarn processing section, and In a fluid treatment device that applies the pressurized fluid to the yarn passing through to increase the bulk of the yarn, there is provided a nozzle end surface on the yarn exit side of the fluid injection nozzle, one end of which is connected to the yarn exit and the other end of which is connected to the outer periphery of the nozzle end surface. 1. A fluid processing device characterized by forming an elongated thread guide groove.