JPS6040526B2 - Yarn processing equipment - Google Patents

Description

Detailed Description of the Invention The present invention is a yarn processing device that applies high-speed fluid to a running multifilament yarn to impart crimps, loops, entanglements, etc. to each single fiber of the multifilament yarn to create a bulky yarn. Regarding the improvement of

Conventionally, high-speed fluid is applied to running yarn to create numerous loops.
Yarn processing devices for obtaining entangled basket yarns are known from Japanese Patent Publication No. 38-2828 and U.S. Patent No. 3,545,057, but the yarns obtained by these devices are relatively thin. Even when treated under low tension, loops and crimps disappear, and when processed into a knitted fabric, it does not maintain the expected bulkiness. In order to improve these defects, the loops and crimps applied to the yarn are used to make the yarn ejected from an orifice collide with a jamming plate to strengthen the mutual entanglement of the single fibers. A device that strengthens the confounding was developed in Tokusei in 1977.
Although this device has been proposed in Japanese Patent No. 187845, it has not yet been possible to obtain a satisfactory high basket yarn.
The present inventors have improved the above-mentioned device and have developed a new device in which a guide different from the collision plate is provided near the yarn exit, and the traveling direction of the yarn is changed through the yarn guide surface of the guide. It was proposed in Buta No. 52-74454 (see Special Publication No. 54-11352).

Figure 1 is a sectional view showing the structure of the entrusted device;
This figure is an enlarged view of the vicinity of the yarn exit of the apparatus shown in FIG. 1. In FIG. 1, a fluid injection nozzle 1 includes a thread inlet 5 in a hollow portion 4 of a nozzle body 3, into which a needle 7 having an elongated hole 6 is inserted.

The tip of the needle 7 is provided at the tip of the hollow portion 4, located within the conical thread processing chamber 8, and is fixed opposite to the throat portion 9 of the orifice 12. The orifice 12 has a throat 9 that is aligned with or slightly eccentric to the axis of the elongated hole 6 provided in the needle 7. Following this throat 9, there is a trumpet-shaped passage 10, the tip of which serves as the yarn outlet 11. The nozzle end face 13 has an open □ shape. A fluid introduction pipe 14 is connected to the hollow portion 4 of the nozzle body 3 for introducing pressurized fluid into the yarn processing chamber 8 from the outside. When pressurized fluid is introduced into the fluid injection nozzle 1 having the above-described structure and the running yarn 15 is supplied from the yarn inlet 5, the yarn passes through the elongated hole 6 of the needle 7 and is guided to the yarn processing chamber 8.

The pressurized fluid introduced from the fluid introduction pipe 14 flows into the yarn processing chamber 8 through the hollow portion 4 at high speed (hereinafter simply referred to as high-speed fluid). Due to the action of this high-speed fluid, the entire single wire constituting the yarn 15 is untwisted and disturbed, and is jetted out from the yarn outlet 11 through the orifice 12 with the high-speed fluid. Immediately after the yarn ejected together with this high-speed fluid exits the yarn outlet 11 that is closed to the nozzle end face 13, it separates from the high-speed fluid in a direction approximately perpendicular to the flow direction of the high-speed fluid and is drawn out. The thread becomes a high basket thread 17 in which loops and the like are formed, and is taken off by a known take-off device (not shown). During this process, a bending point 16 occurs, as shown in FIG. 2, where the thread changes direction. By regulating the thread path of the thread immediately after the bending point 16 by the thread guide surface 18 of the fixed guide 2 provided without covering the closed end of the thread outlet, compared to a conventional device in which the fixed guide 2 is not provided,
In the vicinity of the bending surface 16, the thread vibrates more violently. As a result, more crimps, loops, or tangles occur in the constituent single fibers of the running yarn, and these loops become strongly entangled with each other, resulting in the above-mentioned Japanese Patent Laid-Open No. 49-87.
It is possible to obtain a bulky yarn that has bulkiness that could not be obtained with the device No. 845, and whose bulkiness is stably maintained. FIG. 3 is a cross-sectional view showing a fluid injection nozzle in a different manner from that in FIG. It is characterized by a structure in which a fluid hole 20 is provided in the collar 19 and the flow of fluid supplied from the fluid introduction pipe 14 to the yarn processing chamber 8 is limited. In addition, as a fluid injection nozzle, a high-speed fluid is applied to the running yarn,
The fixed guide 2 is not limited to the above structure and can be effectively used as long as it has a structure that allows the running yarn to be ejected together with the high-speed fluid. FIG. 4 is a sectional view showing an example of the fixed guide 2 described above.

A bulky yarn manufacturing apparatus in which a fixed guide 2 having the structure shown in FIG. 4 is combined with the above-mentioned fluid injection nozzle has a guide surface 21 having a length L parallel to and facing the flow of high-speed fluid on the downstream side in the flow direction of the high-speed fluid. exists and the guide surface 21 is fixed closer to the ejected fluid side than the above-mentioned appropriate guide position, the bending point 16 of the yarn ejected from the yarn exit orifice together with the high-speed fluid will be at a high speed, as shown in FIG. The yarn blows up along the guide surface 21 along the flow of the fluid, making the yarn processing state unstable. Yarn processed under such conditions will have many coarse loops formed, resulting in poor yarn quality. The mentioned phenomenon is that it is extremely difficult to adjust the positional relationship between the fluid jet nozzle 1 and the fixed guide 2 in each individual device, and a slight difference in adjustment has a large effect on yarn quality. This causes a large difference in the quality of yarn between spindles.

The present invention eliminates the deficiencies of the conventional technology, uses a known fluid injection nozzle, and specifies the shape of the fixed guide described above, thereby making it easy to adjust the positions of the fluid injection nozzle 1 and the fixed guide 2. It is an object of the present invention to provide a novel yarn processing device for producing a yarn with excellent stiffness resistance and high stiffness stability. The present invention has the following configuration to achieve the above object.

That is, it consists of a yarn passage formed by arranging a yarn inlet, a yarn processing chamber, and a yarn outlet in this order, and a fluid injection nozzle equipped with a fluid introduction section for introducing pressurized fluid into the yarn treatment chamber. In the yarn processing device for applying the pressurized fluid to the yarn passing through the passage to impart crimps, loops, entanglements, etc. to all the single fibers constituting the yarn to form a bulky yarn, the end face of the fluid jet nozzle A fixed guide is attached opposite to the thread outlet and close to the thread outlet, and a thread guide surface is formed on the side facing the nozzle end surface of the fixed guide, and the traveling direction of the thread spouted from the thread outlet is guided by the thread guide surface. The flow of the high-speed fluid is caused to change in a direction substantially perpendicular to the flow of the high-speed fluid, and the fixed guide includes a peripheral edge of the yarn exit end face of the fluid jet nozzle on the side that is caused to change in the perpendicular direction, and a peripheral edge of the high-speed fluid of the fixed guide. A surface along the flow of the fixed guide is installed so that it substantially coincides with a direction along the flow of the high-speed fluid, and a surface downstream of the surface of the fixed guide along the flow of the high-speed fluid; This yarn processing device is characterized in that it is formed so as to be separated from the flow of the high-speed fluid with respect to the traveling direction of the high-speed fluid to such an extent that the flow of the fluid ejected from the yarn outlet does not come into direct contact with the flow of the fluid.

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

FIG. 5 shows an example of the shape of the fixed guide used in the present invention, and FIG. 5 shows a small front view, and 'b' shows a cross-sectional view taken along the line X-X' of 'a'.

The fixed guide shown in FIG. 5 differs from the fixed guide shown in FIG. It is placed away from the flow of fluid.

FIG. 8 is a cross-sectional view showing a running state when the basket high thread is processed to be bulky using the apparatus for manufacturing basket high thread using the fixed guide having the shape shown in FIG. As shown in FIG. 8, if the yarn 15 is supplied with the tip of the fixed guide 2 facing near the yarn outlet 11 of the fluid jet/zulu, the traveling yarn will bend at a bending point 16 at the point where it contacts the tip of the guide 2. The fibers formed on the downstream side of the ejected fluid from the tip of the fixed guide are regulated by the guide surface 21 without being spouted up along the guide surface 21. It can vibrate freely without any friction, and compared to the guide shape shown in FIG. 4, there are fewer coarse loops and the yarn quality is uniform.

The inclination angle of the guide surface 21 shown in Fig. 5 is determined by taking into consideration various requirements such as the material to be used and the bulk height of the bulky yarn, but as will be made clear in the examples, it should be between 00 and 600. is good.

FIG. 6 shows a side view of the fixed guide 2 having a different shape from that in FIG. 5, and a sectional view taken along the line XX shown in the side view.

The pin-shaped fixed guide shown in Fig. 6 also has pins D and d.
By appropriately selecting the denier of the thread, the fifth
It exhibits the same effect as the fixed guide having the shape shown in the figure. 9 and 10 illustrate an apparatus using the fixed guide shown in FIG. 6.

Furthermore, as shown in Fig. 9, a configuration in which a plurality of pin-shaped fixed guides are arranged to increase the winding angle of the thread is suitable for obtaining a more stable basket thread than a single fixed guide. ing.

Furthermore, as shown in FIG. 10, it is also possible to pull out the thread after passing through the fixed guide 2 in the flow direction of the high-speed fluid.

Further, in the fixed guide 2 used in the present invention, the portion that comes into contact with the running yarn may be finished to reduce frictional resistance with the yarn, or a wear-resistant material may be used in necessary portions.

Particularly, corners of the guide 2 that constantly come into contact with the thread are rounded to prevent damage to the thread. Further, the pressurized fluid used in the present invention is usually compressed air at room temperature.

However, without being particular about this, in addition to heated compressed air, steam, etc., air containing water droplets can also be used to increase the stability of the bulky yarn. In this case, water droplets may be added during the process of supplying the compressed air, or wet yarn may be supplied. As stated above, since the yarn processing device according to the present invention has the above configuration, it has the following characteristics.

First, in the device according to the present invention, as is clear from a comparison of FIGS. 7 and 8, the guide surface 21 of the fixed guide 2 does not come into direct contact with the flow of high-speed fluid ejected from the yarn outlet 11. The running yarn is not blown up as shown in FIG. 7, and the traveling yarn is bent at the tip of the fixed guide 2 as shown in FIG. 8, so that bulky yarn can be stably produced.

In addition, as shown in Figure 7, since the running yarn is in contact with the guide surface and does not move, the individual single fibers that make up the running yarn have a high degree of freedom to move around freely due to the high-speed fluid flow. Due to the action of the vibration and turbulence of the fluid flow, loops, crimps, entanglements, etc. applied to the running yarn can be entangled and firmly fixed.
Therefore, the bulky yarn obtained by the apparatus according to the present invention has a high bulkiness stability and can maintain an appropriate bulkiness expected for knitting and weaving machines. Example 1 The fixed guide has the shape shown in Fig. 5, and the inclination angle of the guide surface is different 8 = 900,7
Five types were produced: 50,600, 4y, and 00.

The main dimensions other than 8 are inside groove 28 W = 1 fence, depth h = 0.
5 ribs and the height of the groove tip H = 1 side from the horizontal 150
The yarn guide 18 is provided with an inclination of .

The corner of the tip of the guide is rounded. The material is hardwood with chrome satin plating. Note that FIG. 11 is a cross-sectional view showing a guide shape with an inclination angle a=oo, and in this example, the guide surface length L=0.5 side was used.

On the other hand, the fluid injection nozzle has the shape shown in FIG.
78 side, the diameter 2.5 side of the yarn outlet 11, and the diameter 2.78 side of the fluid hole 20 were used.

FIG. 12 is a schematic diagram showing the relative position of the fluid jet nozzle and the fixed guide 2, in which the tip of the guide 2 faces the circumferential hole of the yarn outlet 11 which is connected to the nozzle end surface 13 of the fluid jet nozzle 1 (the guide The point where the perpendicular line drawn from the tip of Nozzle 2 to the nozzle end surface 13 touches the circumference of the yarn outlet was set as the origin, the direction in which the bent yarn travels was set as 10, and the bulky yarn was manufactured with the guide moved by X skin. .

Other manufacturing conditions are as follows.

The high-speed fluid used was compressed air with a pressure of 5K9/G (G), and a 150 denier, 72 filament polyester yarn was sprayed at 30 h/min from the supply roller to the fluid jet nozzle to spray water droplets onto the running yarn. )
The yarn was fed and taken up by a take-up roller at a rate of 20 plates/min, and the yarn pulled out from the take-up roller was wound up at a winding tension of 15 terres.

The number of coarse loops present within a certain length of the obtained thread was counted using a photoelectric pickup.

After each guide, measure the loops of bulky yarn obtained when changing the distance from 0 skin to 2 legs, based on the number of coarse loops at guide distance x = 1, The number of coarse loops is expressed as a percentage.

The results obtained are shown in FIG. In this embodiment, the inclination angle of the guide surface shown by the broken line in FIG. 13 is 8:9.
00,750 has a large increase in coarse loops on the x=0.5 side and x=0 side, or the thread blows up and cannot be processed. It can be seen that there are few changes in the coarse loop in Japan.

Example 2 In the pin type guide shown in FIG. 6, the flea D=2 side, d=
In the case where two pieces of one leg were arranged side by side as shown in FIG. 9, thread quality almost the same as that of one with a guide surface angle of 8=600 was obtained.

As shown above, the guide shape according to the present invention has less influence on the thread quality due to the guide position than the conventional guide shape.
It is possible to obtain bulky yarn with stable quality.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a conventional device, and FIG. 2 is an enlarged view of the vicinity of the yarn exit in FIG. FIG. 3 is a sectional view showing a fluid injection nozzle in a different form from that of FIG. FIG. 4 shows the shape of a guide of a conventional device, with a being a front view and b being a sectional view. 5 and 6 show the shape of the guide used in the device according to the present invention, in which a is a front view and b is a sectional view. FIG. 7 is a sectional view illustrating the yarn processing state in the subordinate device, and FIG. 8 is a sectional view illustrating the yarn processing state by the device according to the present invention. 9 and 10 are cross-sectional views illustrating an embodiment of an apparatus according to the present invention using a guide having the shape shown in FIG. 6. FIG. 11 shows the inclination angle 8 of the guide surface in Example 1.
FIG. 12 is a cross-sectional view showing the guide shape when =00, and is a schematic view showing the positional relationship between the nozzle 1 and the guide 2 in Example 1. FIG. 13 is a graph showing the quality characteristics of the bulky yarn obtained in Example 1. 1: fluid injection nozzle, 2: guide, 3: nozzle body, 5: yarn inlet, 7: needle, 8: yarn processing chamber, 11: yarn outlet, 16: bending point,
18: Thread guide surface, 21: Guide surface, 28: Book. Figure/Key Z Figure 3 Figure 4 ? Figure 5: Crowded Figure: Figure 8: Curtain'0 Figure: Crowded Figure: Saddle'Z: Crowded Figure

Claims (1)

[Claims] 1 Consisting of a yarn passage formed by arranging a yarn inlet, a yarn processing chamber, and a yarn outlet in this order, and a fluid injection nozzle equipped with a fluid introduction part for introducing pressurized fluid into the yarn treatment chamber, the yarn passage In a yarn processing device in which the pressurized sulfur is applied to the yarn passing through the yarn to impart crimps, loops, entanglements, etc. to the single fibers constituting the yarn to form a bulky yarn, the end surface of the fluid jet nozzle is A fixed guide is installed opposite and close to the yarn outlet, a yarn guide surface is formed on the side facing the nozzle end surface of the fixed guide, and the yarn guide surface moves the yarn ejected from the yarn outlet at a high speed. The fixed guide is adapted to transform the fluid flow in a direction substantially perpendicular to the fluid flow.
A peripheral edge of the yarn exit end face of the fluid injection nozzle on the side that is converted to the perpendicular direction and a surface of the fixed guide on the side along the flow of the high-speed fluid substantially coincide with the direction along the flow of the high-speed fluid. The downstream surface of the fixed guide along the flow of the high-speed fluid is attached to the direction of travel of the high-speed fluid to the extent that the flow of fluid ejected from the yarn outlet does not directly contact the downstream surface of the fixed guide along the flow of the high-speed fluid. A yarn processing device characterized in that it is formed so as to move away from the flow of high-speed fluid.