JPS5926686B2 - Yarn twisting device and yarn twisting method using the device - Google Patents

Description

Detailed Description of the Invention The present invention introduces high-speed airflow generated by the self-rotation of the false-twisting spinner into the inner tube of the spinner through a nozzle or slit (hereinafter referred to as air introduction hole) provided in a part of the spinner. A false twisting spinner device for false twisting filament yarns, manufacturing intertwined yarns, or manufacturing bulky yarns by causing the high-speed air turbulence to collide with filament yarns passing through the inner tube, and a yarn twisting method using the device. It is related to.

Air jet processing uses the turbulent flow effect of compressed air to give filament yarn bulk, or high-speed airflow impinges on the filament system passing through pores in the axial or non-axial direction to give twist to the filament yarn. Alternatively, methods of entangling filament yarns have already been proposed and are widely known.

However, since each of these air-based processing uses compressed air, the equipment and operation costs for the air source required for processing are enormous, and due to cost obstacles, it is not possible to use it except in special fields. The reality is that it has not yet been widely used.

The purpose of the present invention is to overcome the equipment and commercial difficulties associated with the use of compressed air as described above, to generate a high-speed air flow by utilizing the self-rotating action of spinner rotation, and to process filament yarn by using this. That is.

That is, the first feature of the present invention is to provide a false twisting spinner for achieving the above object, and the second feature is to provide a novel compounded spinner by using the spinner. An object of the present invention is to provide a yarn twisting method.

The present invention is achieved by providing an air introduction hole in a part of the spinner body for introducing air around the spinner into the inner tube, and the hole opens in the direction of rotation of the spinner, and , is located at a tangential position of the inner tube, and generates a swirling air flow in the spinner inner tube in a direction opposite to the spinner rotation direction by introducing surrounding air into the inner tube through the nozzle as the spinner rotates; The spinner is characterized by air jet treatment by impinging a flow of air transversely on the filament passing through the inner tube of the spinner.

Further, the present invention uses the above-mentioned spinner and balloons the filament yarn by a swirling air flow introduced from the air introduction hole to at least partially transform the filament yarn.
That is, it is characterized by intermittent or continuous contact with the inner tube wall of the spinner, and simultaneously applying an air jet process using a swirling air flow and an internal friction process to the filament yarn.

Hereinafter, specific embodiments of the present invention will be further described in detail based on the accompanying drawings. The attached drawings 1 to 8 are external or sectional views showing the structure of the false twisting spinner according to the present invention. 1 is the spinner inner tube, 2 is the spinner outer wall,
Reference numerals 3 and 3' indicate nozzles as an example of air introduction holes for introducing air, and 4 and 4' indicate orifice portions of each nozzle with respect to the spinner inner tube 1.

In each of the above figures, the nozzle opens in the spinner rotation direction from the tangential position of the spinner inner tube 1,
The opening is further enlarged in the spinner rotation direction toward the open end of the spinner outer wall.

In this case, if the angle of the opening leading to the outer wall of the spinner is too small, the effect of introducing air will be small.
° is preferred.

Moreover, it is advantageous to construct the opening so that it is gradually widened, that is, as shown in FIG. 1.

FIG. 2 shows a case in which the angle from the orifices 4, 4' to the opening end of the outer wall in the above description is about 60 degrees.

Further, the opening angle of the nozzle at the opening in FIG. 4A, FIGS. 5 to 7, and FIG. 8 is about 30 to 45 degrees.

On the other hand, FIG. 4 shows a case where the opening angle is 90 degrees.

In this spinner, the outer wall simply serves as a partition plate in the nozzle portion.

Note that the nozzles are not limited to the case where they are arranged symmetrically in one stage as shown in Fig. 1, but are spread over multiple stages as shown in Figs. Although the number is four, an appropriate number can be provided.

Also, each nozzle does not necessarily have to have the same opening angle,
Nozzles with different opening angles can be used together as appropriate.

Further, as shown in FIG. 7, it is also possible to change the direction of inclination of the nozzle toward the orifice as appropriate, and this can also be done at any time depending on each case.

The above design modifications are due to the fact that the swirling air flow velocity and number of swirls in the inner tube involve many factors, and therefore are not easy to measure.

As a result of repeated various experiments, the present inventor found that the total air flow rate relative to the spinner inner tube volume is limited by the spinner shape including nozzle dimensions, etc., and as a result, even if the number of nozzles is increased, there is a limit unique to the shape of each spinner. It was found that the flow velocity is high.

Therefore, the present invention does not require any limitations on the nozzle shape, the number of nozzles, or the nozzle diameter relative to the inner pipe diameter.

In principle, in the spinner according to the present invention, the air flow rate can be easily adjusted by changing the spinner rotation speed. The ratio of flow rates and pressures can also be varied.

It can be said that this ability is extremely tolerant of the characteristics of the filament yarn to be processed.

In other words, by adjusting the settings during processing of the filament yarn to be processed, especially the overfeed rate, heating tension, and untwisting ability, it is possible to process yarns of different deniers with the same spinner. It is.

Next, to explain the mode of processing using the spinner, similar to the false twisting process in a conventional false twisting machine,
It is sent from the feed roller, passes through the spinner inner tube via a heating device, and is heated and untwisted in the process of being taken up by the take-up roller. Air is introduced and the high-velocity air swirl created within the spinner inner tube imparts twist to the passing filament yarn by impinging non-axially on the filament yarn.

At this time, when processing is performed by applying a relatively large overfeed to the filament yarn to be sent, ballooning occurs in the filament yarn around the spinner nozzle portion.

At this time, by finely adjusting the overfeed rate, if the ballooned filament yarn is brought into contact with the spinner inner tube wall intermittently or continuously, the rotation direction of the spinner and the swirling air flow inside the spinner inner tube can be changed. Since the directions are opposite to each other, the filament yarn that performs ballooning while rotating in the same direction as the swirling air flow will be twisted violently in the opposite direction at the moment it contacts the inner tube wall of the spinner. Air jets and rotation due to internal friction are simultaneously combined to create a completely new twisted yarn configuration.

It is noteworthy that in this composite processing, a high-quality interlace yarn was obtained by using a spinner whose inner tube had a non-circular cross section.

Another feature of the above-mentioned processing method of the present invention is that the overfeed rate is not the same as that of conventionally known air jet processing.

Conventionally, the most common overfeed rate for the air jet method that has been proposed is 15% to 25%, but when performing false twisting using the spinner of the present invention, the appropriate overfeed rate has been determined from experiments. Results showed that an overfeed rate of 2% to 6% was good.

When this overfeed rate was further increased, it was 18%~
The upper limit is 20%, but when I lowered it to about 1.5%, processing was possible.

Incidentally, 4.0 at 1.5-18% overfeed
~18% overfeed: medium to strong twist, ■, 5 to 5
If the overfeed rate is less than 1%, the yarn will be lightly twisted, and if the overfeed rate is less than 1%, it will not be possible to process it at all, but if the feed rate is increased (continued), a spring yarn for untwisted yarn can be obtained.

Note that the above overfeed rate ignores differences in the spinner inner tube diameter and the number of nozzles, as well as the thickness of the filament yarn.

The filament yarns subjected to the false twisting process using the spinner according to the present invention have various characteristics different from those obtained by the conventional false twisting process.

First of all, it is always accompanied by a snarl.

The snarl in this case is different from the snarl that occurs during general soft twisting, and is a result of the processing process, so it can be said to be spun-like.

In addition, the yarn is a high-quality yarn that has a protruding end with curling, has a large bulkiness, and has a novel texture.

The aforementioned snarls occur both during thin twisting and strong twisting, but in lightly twisted ones they tend to disappear under a relatively small load, whereas during strong twisting the snarls are relatively firmly fixed and disappear under load. is hardly seen.

In addition, although the above explanation has been given for the case where the air introduction hole is a nozzle, the air introduction hole is not limited to a nozzle, and may be in the shape of a slit having an appropriate length in the longitudinal direction. The shape is the same as the illustrated example, and the same features as described above can be obtained.

Each of the spinners described above and shown in the drawings has an air introduction hole formed in the spinner body. For example, in FIG. 2, the orifice portions 4, 4
The spinner body extends up to the outer end, and the spinner outer wall 2 including the openings of the nozzles 3 and 3' was created as an additional member separate from the spinner body and covered the spinner body at the center and its outer periphery. The yarn twisting device of the present invention may be constituted by both of the additional members, and this can also achieve the same object as described above.

Next, examples of the present invention will be presented to further clarify the present invention.

Example 1 A 75-denier, 36-filament polyester yarn was used as a raw material and false-twisted under the following conditions.

Delivery roller speed 192m/min Overfeed rate 4.2% Heating tension
24g untwisting tension
361 spinner rotation speed 40000 O
rpm spinner nozzle number 2 nozzle orifice diameter 0.3mr/L
φ spinner inner tube diameter 1.4 mmφ The yarn processed under the above conditions was a high quality processed yarn that was extremely bulky with many slacks due to the constituent filaments along the longitudinal direction.

Example 2 As in Example 1, 75 denier, 36 filament polyester yarn was used, and the spinner rotation speed was 40,000 Or
False twisting was performed at pm under the following conditions.

Delivery roller speed 190m/min Overfeed rate 5.2% Heating tension
20 g untwisting tension
35 Number of Gesviner nozzles
2 nozzle orifice diameter 0.2mm
φ Spinner inner tube diameter: 1.3 mmφ The false twisted yarn obtained under the above conditions was an extremely thinly twisted yarn.

This is probably because the orifice diameter was too small and the flow velocity was high (but the flow pressure of the swirling air flow was insufficient by applying torque to the filament thread).

Example 3 A polyester yarn of 150 denier and 30 filaments was subjected to false twisting at a spinner rotation speed of 400,000'pm under the following conditions.

Delivery roller speed 285 m7 minutes Overfeed rate 5.3% heating tension
19 Gu untwisting tension
38′? Number of spinner nozzles
4 Nozzle orifice diameter: 0.6 mmφ Spinner inner tube diameter: L4 mmφ The obtained processed yarn is more twisted than normal false twisted processed yarn, but considering the delivery speed during false twisting using a normal spinner, this implementation is suitable. The delivery speed of the example was actually as high as 78% or more, and the processed yarn could be used satisfactorily.

Example 4 75 denier, 36 filament polyester yarn and 1
A polyester yarn of 50 denier and 30 filaments was intertwined and processed at a spinner rotation speed of 40,000 rpm according to the following conditions.

Terriberry roller speed 167 m7 minutes Overfeed rate 4.0% heating tension
46 Gu untwisting tension
65 Number of Gesviner nozzles
6 Nozzle orifice diameter: 0.3 mmφ Spinner inner tube diameter: 1.4 mmφ In the above processing, the overfeed rate was reduced and settings were made so that only interlacing could be performed, and the resulting processed yarn had intermittent entangled portions in the longitudinal direction. It was a conspicuously interlaced yarn.

Example 5 A 75-denier, 36-filament polyester yarn was used, and the spinner rotation speed was 40,000 as in each of the previous examples.
Interlace processing was performed using Orpm under the following conditions.

Delivery roller speed 131 m7 minutes Overfeed rate 11.5% heating tension
4. Untwisting tension
9 Number of Gesviner nozzles
2. Nozzle orifice diameter: 0.5 mmφ Spinner inner tube diameter: Non-circular cross section The processed yarn obtained has an appearance completely different from that of the above-mentioned examples,
The yarn had parts that were tied together intermittently in the longitudinal direction.

The bound parts are firmly bound, with an average pitch of about 4.4 mm at 50 locations, and the number of bulges is 1.
It was 05-123 pcs/m.

As is clear from the above examples, the apparatus and yarn twisting method of the present invention can easily produce a variety of processed yarns, and is a completely different method from the conventionally known air jet method. , it is possible to obtain processed yarns having a variety of novel textures.

[Brief explanation of drawings]

Fig. 1 is an external view showing an example of a spinner for false twisting according to the present invention, Fig. 2 is a sectional view taken along line A-A' in Fig. 1, Fig. 3 is an external view of the spinner for false twisting, and Fig. 4 B. Each side of the chewing machine in the Y-Y cross section in FIG. 3 is shown. Figure 5 A 2 is the x-x' sectional view and Z-Z sectional view in Figure 3, and Figure 6 A is the same (x in Figure 3
-x' cross-sectional view and other examples of the z-zm plane are shown. Fig. 7 is a cross-sectional view and a line diagram showing various inclinations of the nozzle and orifice, and Fig. 8 is an external view showing another example of the spinner for false twisting, and lines BB' and C. -C line sectional view. 1...Spinner inner tube, 2...Spinner outer wall, 3゜3'...Nozzle, 4,4'...
...Orifice part.

Claims (1)

[Scope of Claims] 1. An air introduction hole is provided that penetrates the inner tube of the spinner from the outer wall of the spinner for false twisting and introduces the air around the spinner into the inner tube of the spinner due to the self-rotation action of the spinner, and the introduction hole is inserted into the inner tube of the spinner. Opens in the spinner rotation direction from the pipe tangent position,
The yarn twisting device is characterized in that the open end of the outer wall of the spinner further opens at an angle of 45 to 90 degrees toward the direction of rotation of the spinner. 2. The yarn twisting device according to claim 1, wherein the air introduction hole is a nozzle provided in the main body of the spinner. 3. The yarn twisting device according to claim 1, wherein the air introduction hole is a slit provided in the main body of the spinner. 4. The yarn twisting device according to claim 1, wherein the air introduction hole is provided in an additional member that is fitted around the outer periphery of the spinner body and forms the outer wall of the spinner. 5. It has an air introduction hole that communicates with the spinner inner wall from the spinner outer wall, the introduction hole opens in the spinner rotation direction from a tangential position of the spinner inner tube, and the open end of the spinner outer wall further extends 45 to 90 mm in the spinner rotation direction. °Using an open false twisting spinner, the spinner's self-rotating action generates a high-speed air swirling flow within the spinner inner tube, causing the swirling flow to impinge on the filament in a non-axial direction, and furthermore, the swirling flow This causes ballooning of the filament yarn passing through the spinner, causing the filament yarn to come into contact with the inner tube wall of the spinner at least partially. A yarn twisting method characterized by combining contact friction processing at the same time.