JPS597813B2 - Method and device for producing spun yarn-like yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for producing a spun yarn-like yarn having the texture and appearance of a spun yarn, which has a continuous multifilament yarn as a component, and more specifically relates to To provide a method and apparatus for producing a spun yarn-like yarn having slight unevenness and bulkiness covered by a large number of loops by entangling continuous multifilament yarn around a core yarn in multiple layers by the action of It is.

Various methods and apparatuses have been proposed so far for producing spun yarn-like yarns by converging multifilament yarns into a loop shape using the action of fluid.

For example, a continuous multifilament yarn may be passed through a region of high velocity turbulent fluid to randomly create loops, tangles or entanglements.

This is one of the well-known representative methods called the so-called Taslan method.

This method can produce yarns that look similar to spun yarns, but since twisting is essential to fix the protruding loops on the surface, the yarns also have poor bulk, making them less bulky than spun yarns. This method has the disadvantages that it feels harder than the conventional method, and high pressure air is required, so the air flow rate is large, and the processing speed is relatively low, which increases the manufacturing cost. This was disadvantageous in practical terms.

Another method is to supply the fibers sent out with a high-speed airflow into a swirling airflow tube and take them along the axis of the tube and in the opposite direction to the direction in which the swirling airflow is discharged from the tube (Japanese Patent Publication No. 47-36225 ), but the yarn produced by this method has extremely low strength and brittleness, making it impractical.

Another method is to supply one or more continuous multifilament yarns with a high-speed airflow into a swirling airflow chamber, wrap the yarn around a core yarn running in the axial direction in the chamber, and take it off at a speed slower than the feeding speed of the yarn (U.S. Pat. No. 3041812 and Japanese Patent Publication No. 49-24177), however, the entanglement of the yarn obtained by this method is very poor, and when the yarn is squeezed in the subsequent process, such as knitting and weaving, the threads become loose. This yarn could not be used as a clothing yarn because it slipped loosely on the core yarn, resulting in a slab-like shape, or jammed in the guide, causing yarn breakage.

In order to solve this problem, the present inventor has developed a technique for creating a substantially untwisted continuous multi-layer yarn for the core yarn which is first twisted by a fluid twisting element and then runs along the tenon axis in the fluid twisting chamber. After the filament yarn is injected together with a high-speed fluid into the fluid twisting chamber in the tangential direction of the yarn path at a speed of three times or more of the core yarn running speed to merge with the core yarn, the fluid twisting is performed. We proposed a method for producing spun yarn-like yarn that is intertwined with elements.

By this method, the above-mentioned drawbacks of the tenon can be solved, and it has become possible to easily produce a spun yarn-like yarn having the texture and appearance of a spun yarn, which has a continuous multifilament yarn as a constituent element. The present invention was achieved as a result of efforts to reduce thread unevenness and improve the entanglement of threads.

That is, the present invention provides a substantially untwisted continuous core yarn that is twisted by the fluid twisting element on the upstream side of the fluid twisting element and runs in the tenon shaft center of the five fluid twisting chambers. A thread made of multifilament yarn is injected along with a fluid along the tangential direction of the thread path into the fluid damping chamber at a speed that is more than three times the running speed of the core thread, and the thread is opened at the bottom of the thread injection hole. After being temporarily retained in a small chamber having a porous bottom with a porosity of 45% or less and 0% or more, it is merged with the core yarn, and then passed through the fluid twisting element to untwist the core yarn. A method for producing a spun yarn-like yarn characterized by intertwining a filament with the core yarn, and an apparatus suitable for carrying out this method include a core in which a fluid twisting chamber and a fluid twisting element run. They are arranged in order along the traveling direction of the yarn, and the fluid stirring chamber has a yarn injection hole curved in the tangential direction of the yarn passage, and the bottom of the yarn injection hole has an aperture ratio of 45% or less. This is an apparatus for producing spun yarn-like yarn characterized by forming a small chamber having a bottom surface with a porous surface of 0% or more.

Next, the present invention will be further explained in detail using the drawings.

FIG. 1 is a perspective view of the manufacturing apparatus of the present invention, FIG.
The figure is a horizontal sectional view of one or two examples of the fluid swell chamber along line 1 in Fig. 1, and Fig. 4 is a vertical sectional view of the fluid swell chamber along line IV-It/ in Fig. 1. , FIG. 5 is a longitudinal sectional view of the fluid twisting element taken along line 1-V in FIG.

FIG. 6 is a longitudinal sectional view of an integrated fluid twisting chamber and fluid twisting element.

In FIG. 1, a thread 2 consisting of a substantially untwisted continuous multifilament thread drawn from a suitable package 1 is actively fed out by a feed roller 4 through a guide 3 and below the feed roller 4. The fluid is supplied along with the fluid stream through the thread injection hole 22 in the tangential direction of the thread passage 28 of the fluid damping chamber 6 by the ejector 5 provided in the
The thread is temporarily retained in a small chamber 27 provided at the bottom of the thread injection hole 22.

On the other hand, the core yarn 8 is taken out from the package 7 and guided through the guide 9.
The yarn is sent out by the supply roller 10, twisted by the fluid twisting element 11, and passed through the core introduction hole 15 provided at the center of the tenon on the upper surface of the fluid twisting chamber 6. When passing approximately the axial center, the thread 2 retained at the bottom of the thread injection hole 22 is wrapped around it and pulled out from the lower surface of the fluid stirring chamber 6 to become an entangled thread 19.
Subsequently, it passes through the fluid twisting element 11 to become a yarn 25 with dramatically improved yarn unevenness and entanglement, which is then actively sent out by the delivery roller 12, passes through the guide 26, and is driven to the surface by the drive drum 13. It is wrapped in a package 24.

The obtained yarn has a large number of loops of the constituent filaments of the yarn 2 around the core yarn 8, and is tightly entwined in multiple layers, giving it a warm spun yarn style with mild unevenness and bulkiness. It has a very natural feel, a very natural appearance, and excellent performance in handling in post-processes.

The yarn 2 used here is preferably a substantially untwisted continuous multifilament yarn, with a twist count of 50 T/
If the filament exceeds M or has been subjected to a high degree of fluid entanglement treatment, the filaments will not be separated sufficiently from each other.
It is not suitable for use because it covers the core thread 8 and forms a large number of delicate loops of monofilament units, and it is difficult to obtain a slightly firm intertwined state with irregularities.

However, if it is a substantially untwisted multifilament yarn, yarns of the same or different luster, color tone, dyeability, shrinkability, cross-sectional shape and other properties, different fineness or number of constituent filaments may be used as necessary. There is no problem even if one or two or more threads are tied together or twisted together.

On the other hand, the core yarn 8 is not particularly limited as long as it is generally used for clothing, and may include continuous multifilament yarn,
Bulky processed yarns, spun yarns, or one or more yarns of the same type or with different properties similar to those of the filament yarn 2 may be combined, but yarns with a significantly high elongation rate such as elastic yarns are not suitable. be.

In this processing method, the supply roller 10 for the core yarn 8 is
Although not necessarily required, it is preferable to use it in order to obtain good operability and stability of the yarn quality.

When used, the feeding speed of the supply roller 10 is faster than the take-up speed of the delivery roller 12, that is, the core yarn 8 must be fed to the twisting region in a slightly overfeed state.

In the present invention, the core yarn 8 must be highly twisted by the fluid twisting element 11, and in order to obtain this twisting effect, it is required to suppress the tension of the core yarn 8 in the twisting region to a low level. This is because that.

However, excessive overfeed causes sagging or ballooning in the twisting region, making the operation unstable, so a range of about 0 to 10%, particularly 1 to 4%, is preferable.

The core thread 8 that is twisted under low tension and runs in this way is
The fluid is injected along with the fluid flow in the tangential direction of the thread passage 28 of the fluid damping chamber 6 at a speed more than three times the supply speed of the core thread 8 in the fluid dampening chamber 6 , and the thread at the bottom of the thread injection hole 22 is injected. It comes into contact with the thread 2 temporarily retained in the small chamber 27 and is pulled out from the fluid stirring chamber 6 while wrapping it around it.

Here, the thread injection hole 22 is provided in a tangential direction to the inner wall of the fluid stirring chamber 6, and the bottom thereof forms a small chamber 27, so that the winding unevenness of the thread 2 with respect to the core thread 8 can be prevented. This is essential in order to reduce the The yarn unevenness of the obtained spun yarn-like yarn is reduced when the rotational direction of the swirling flow accompanied by the generated turbulent flow and the rotational direction in which the fluid twisting element 11 rotates the core yarn 8 are in an opposite relationship to each other. It is in good condition.

However, even in the forward direction, a yarn of good quality that can be used for practical purposes can be obtained, so there is no particular limitation.

Here, the function of the small chamber 27 at the bottom of the thread injection hole 22 is to inject the fluid together with the fluid into the fluid damping chamber 6 at a high speed of 3 times or more, preferably 4 to 10 times, the traveling speed of the core thread 8. It is presumed that one of the threads 2 is held there, the speed is reduced, and a fiber opening effect is given, and then the threads 2 are entangled with the core thread 8.

Here, in order to enhance the effect of the small chamber 27 at the bottom of the thread injection hole 22, the axis of the thread injection hole 22 is preferably located outside the wall on the side of the fluid stirring chamber.

That is, as shown in FIG.
If the half meridian is R1 and the radius of the thread injection hole 22 is r, and the length of the perpendicular drawn from the center of the fluid stirring chamber 6 to the axis of the thread injection hole 22 is L, then R<L. <R0r is a preferable range.

That is, even if a small chamber 27 is formed at the bottom of the string injection hole 22 when L is smaller than or equal to R, the fluid stringing chamber 6
Since the area of the opening to
This is because the small chamber 27 does not perform its function because the fluid is guided directly into the fluid stirring chamber 6 without being retained in the fluid chamber 6 .

Further, if L is larger than Rr, the thread injection hole 22 does not open into the fluid damping chamber 6.

Therefore, the small chamber 2 in which the thread 2 is made at the bottom of the thread injection hole 22
7, the area of the opening of the thread injection hole 22 to the fluid stirring chamber 6 is reduced to some extent, and the thread injection hole 22 is connected to the fluid passage 20 of the ejector 5. Therefore, it is desirable that the area of the opening be the same as or slightly equal to the cross-sectional area of the fluid passage 20 so as not to impede the suction effect of the ejector 5.

Furthermore, in order to enhance the retention effect of the thread 2 in the small chamber 27,
As shown in FIG. 3, the bottom surface of the small chamber 27 is a porous surface 30, and
At the same time, it is preferable that a part of the fluid injected by the ejector 5 is discharged to the outside of the fluid sumpling chamber 6 through the porous surface 30 and a fluid discharge passage 29 provided beyond the porous surface 30.

By providing this porous surface 30, the threads 2 are smoothly guided into the small chambers 27 and retained in the small chambers 27 by the discharged fluid flow, and the opening effect is also enhanced.

However, if the porosity of the porous surface 30 of the small chamber 27 becomes too large, most of the high-speed fluid flow injected together with the thread 2 is concentratedly discharged to the outside of the fluid stirring chamber 6 through the porous surface 30. As a result, the thread 2 is strongly pressed against the porous surface 30, and the swirling flow within the fluid stirring chamber 6 disappears, causing the thread 2 to
This is undesirable as the threads begin to move irregularly, resulting in severe thread unevenness and thread breakage.

Therefore, the porosity (total opening area/bottom area) of the porous surface 30 is kept below 45% and above 0%.

preferable. The range is 10-40%.

In addition, the volume of the small chamber 27 varies depending on the denier of the thread 2, the number of filaments, the ease with which it is opened, the number of doublings (the ratio of feeding speed of the thread to the core thread), etc., but it is used for normal clothing purposes. When using 30 to 75D as the filament yarn, it seems preferable to use about 5 to 2 omr1.

The ejector 5 injected into the fluid stirring chamber 6 in this way
By skillfully utilizing the high-speed fluid flow to enhance the effect of the small chambers 27, the unevenness of the threads 2 being twisted is reduced and the entanglement property is further improved.

However, if the bottom of the small chamber 27 is a porous surface 30 as shown in FIG. However, if the bottom surface of the small chamber 27 is not a porous surface, as shown in FIG. Fluid discharge hole 1
6 and the outlet hole 18, etc., and are discharged to the outside.

At this time, the total area of the openings that contribute to discharge that open on the core yarn inlet surface 14 of the fluid stirring chamber 6 is set to be larger than the opening area of the yarn drawing-out surface 17, so that the core yarn injected into the fluid stirring chamber 6 is The threads 2 are guided by the discharged fluid flow so that they are densely present in the upper part of the fluid stirring chamber 6, and the length of the core thread introduction hole 15 is set to a length sufficient to prevent the threads 2 from being ejected. Increasing the chance of contact between the yarn 2 and the rotating core yarn 8 is an important factor in improving yarn quality.

However, depending on the flow rate of the fluid injected into the fluid stirring chamber d, it is not necessarily necessary to make the opening area of the core thread inlet surface 14 of the fluid damping chamber 6 larger than that of the thread drawing surface 17. .

Needless to say, the total opening area that can be discharged must be larger than the opening area of the thread injection hole 22 to the fluid stirring chamber 6 so as not to impede the suction effect of the thread 2 by the ejector 5. Must be.

As mentioned above, in this processing method, the bottom of the thread injection hole 22 provided in the tangential direction to the fluid stirring chamber 6 becomes the small chamber 2.
By forming a T and temporarily retaining the threads 2 there, it is possible to reduce thread unevenness, but the entanglement effect of only the fluid threading chamber 6 is still insufficient, and the method of the present invention does not aim to achieve this goal. In order to obtain a high degree of entanglement, after being pulled out from the fluid twisting chamber 6, the entangled yarn 19 is immediately untwisted by the fluid twisting element 11 and at the same time by the swirling action of the fluid. The result is a spun yarn-like yarn with a uniform appearance and a high degree of entanglement that could not be achieved even with the above methods, and which is easy to handle in post-processing steps, is bulky, and has a warm feel.

Moreover, if the ratio of the supply speed of the core yarn 2 to the supply speed of the core yarn 8 (the number of doublings) is set in a small range of 3 times or more, especially 4 to 10 times, a high degree of entanglement is not lost and a sufficient degree of entanglement is maintained. Because of the ironing resistance, the present invention not only allows the yarn to be obtained to have a fine denier, but also greatly contributes to improving productivity and reducing costs.

The fluid twisting element 11 used here may be configured separately or integrally with the fluid twisting chamber 6, but the fluid twisting element 11 can be configured to pass through the yarn path due to the swirling action of high-speed fluid. There is no particular restriction as long as the structure is such that it can exert a turning force on the yarn, but it is usually preferable that the fluid injection hole 23 is opened in the tangential direction with respect to the yarn passage.

The fluid to be used is not particularly limited, but it is most practical to use air, which is easy to handle in terms of environmental hygiene and safety.

After the fluid injected into the fluid twisting element 11 imparts a turning force to the yarn, it is discharged through the yarn passage, but in the method of the present invention, the direction of the discharged fluid flow is as follows:
It is preferable that the direction is mainly directed toward the fluid stirring chamber 6, that is, in the direction opposite to the traveling direction of the yarn.

An example of the fluid twisting element 11 is shown in FIG. 5, in which a fluid injection hole 23 is opened in a yarn passage 31, and a constriction portion 33 is provided immediately after the fluid injection hole 23 when viewed from the yarn running direction. The more the core yarn 8 and the filament yarn 2 are intertwined, the more the loops protruding from the periphery of the resulting yarn will be smaller and denser.

However, on the contrary, when the yarn is discharged along the traveling direction of the yarn, even when the yarn is discharged evenly through the yarn passage 31 without directionality, the effect is less than in the case described above. Even if the yarn is inferior, a thread that can withstand use can be obtained.

The fluid twisting chamber 6 and the fluid twisting element 11 used to produce the spun yarn-like yarn of the present invention may be in separate forms or integrated as shown in FIG. .

An example of an integrated structure is shown in FIG. 6, in which a fluid twisting chamber 6 and a fluid twisting element 11 are arranged at appropriate intervals at both ends of a porous cylinder 34. There is a joint part 35.3 in order to make it fit freely for convenient threading.
It is better to make 6.

What is important in this device is to ensure that the fluid discharged from the fluid twisting chamber 6 and the fluid twisting element 11 does not interfere with the functions of both, and for this purpose, the porous cylinder 34 has a sufficient opening area. In particular, the starting end 3 of the yarn passage 31 of the fluid twisting element 11
It is preferable that the shape of 7 is flared upward to facilitate discharge from the opening 38 of the porous cylinder 34.

In addition, the inner diameter of the porous cylinder 34 is determined by the inner diameter of the fluid twisting chamber 6 and the fluid twisting chamber 6, since the thread in which the loop of the thread 2 is loosely wound around the core thread 8 runs while rotating. Element 1
It is better to set the diameter to be larger than the diameter of the thread passage in step 1.

There is no particular limit to the length of the porous cylinder 34, but a length of about 10 to 30R is commonly used for yarns used for clothing, and the openings 38 are not limited to circular shapes to ensure sufficient drainage. If this is done, other shapes such as vertically or horizontally long slits may also be used to achieve good results.

Although the fluid twisting chamber 6 and the fluid twisting element 11 are arranged on a vertical line in FIG. 6, the present invention is not limited to this, and some bending of the yarn path is allowed.

As described above, since the present invention does not have any rotating parts other than rollers, it is easy to apply the present invention by attaching it to a conventional machine and increase added value. For example, by installing it in a drawing machine, This is a useful invention that can be easily applied, such as by using a highly oriented undrawn yarn called an undrawn yarn or semi-drawn yarn as the drawn yarn 2, and then immediately intertwining it with a core yarn 8 prepared in advance after drawing it.

Example Using the manufacturing apparatus shown in FIG. 1, polyester multifilament yarn 100D-24f was used as the core yarn,
A spun yarn-like yarn was processed using polyester multifilament yarn 50D-24f with a T/M original yarn twist as a filament yarn.

At that time, the results using various fluid pumping chambers with different specifications are shown in the attached table, but the common condition is that the fluid pumping chamber diameter is 37H.
IIlφ, height 5 shoes, core thread introduction hole length 13 71! , The inner diameter of the core yarn introduction hole is 1.27taφ, the area ratio of the upper and lower discharge holes of the fluid straining chamber is ■, and the fluid used is high-pressure air, which is common to the fluid twisting element, and the pressure when injected into the fluid straining chamber is 1wcIr
As the LG1 fluid twisting element, one of the type shown in Fig. 5 was used, and the air pressure used was ``S'/crlt G, the core thread supply speed was 82.4 rn/yttin, and the core thread supply speed was 50.
Processing was carried out at 0 mA, a core yarn overfeed rate of +3%, and a winding speed of 80 m/vtin.

The operability in the table is × (unable to process yarn), △ (unstable),
The thread unevenness of the obtained thread was evaluated as ○ (stable), and the unevenness of the obtained thread was evaluated using the Worcester Evenness Tester (B manufactured by Zellweger, Switzerland).
The entanglement property was measured using a double-type tethering force tester (manufactured by Maeda Seiki Co., Ltd.), and a sample suspended with a load of 30 da/piece was tested for 10
After arranging the threads in parallel and repeating them 100 times at a bending angle of 145°, the frayed threads were classified into the following four ranks.

As shown in the table, sample number 2 is a sample in which approximately 10 cells are provided at the bottom of the thread injection hole using the method of the present invention, and the resulting yarn has no cells in terms of yarn unevenness and entanglement. It can be seen that this is clearly improved compared to the example No. 1.

In addition, sample numbers 3, 6, and 9.10 compare the porosity when the bottom of the chamber is made porous. As the porosity increases, thread unevenness and entanglement improve, but Open area ratio 2
It shows that it gradually decreases after peaking at 7%, and when it exceeds 45%, it becomes impossible to operate.

In other words, making the bottom surface porous is effective in enhancing the effects of the present invention, but it is preferable to keep it within an appropriate range.

Sample numbers 3 and 4.5 are compared when the distance between the axis of the thread injection hole and the axis of the fluid stirring chamber is changed, but the axis of the thread injection hole is on the side surface of the fluid stirring chamber. Sample No. 4, in which the results matched, had a very large opening area to the fluid stirring chamber and was difficult to operate.

However, as the thread injection hole is moved to the outside of the fluid damping chamber, the opening area to the fluid damping chamber becomes smaller, and the function of the small chamber is exerted.

In addition, samples Nos. 7 and 8, in which the direction in which the threads were injected into the fluid stirring chamber matched (in order) with the direction of rotation of the core thread, had worse thread unevenness than those in Samples Nos. 5 and 6, which had the opposite direction. However, the entanglement property is clearly improved compared to sample number 1, which does not have cells.

Sample Nos. 11 and 12 were samples in which the volume of the small chamber was changed, but if the volume was about 5A and 15 md, it showed a very preferable thread quality.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a manufacturing apparatus for carrying out the present invention, FIG. 2 is a horizontal cross-sectional view of the fluid stirring chamber along the line ■-■ in FIG. 1, and FIG. 3 is a diagram showing another example. 4 is a vertical sectional view of the fluid twisting chamber along the line IV-IV in FIG. 1, and FIG. 5 is a vertical sectional view of the fluid twisting element along the line ■-■ in FIG. 1. , FIG. 6 is a longitudinal sectional view when the fluid twisting chamber and the fluid twisting element are integrated. 2... Ushiito, 5... Egictor, 6
...Fluid stirring chamber, 8... Core yarn, 11.
...Fluid twisting element, 14... Core thread inlet surface, 15... Core thread introduction hole, 16... Fluid discharge hole, 17... ... Yarn pull-out surface, 18...
- Thread exit hole, 19...Tangled thread, 20...
・Fluid passage, 21... ...Fine thread guide hole, 22...
・・・・Shiri injection hole, 26・・Guide, 27・
...Small room, 28...Thread passage, 29...
... Fluid discharge passage, 30 ... Porous surface, 31.
... Thread passage, 32 ... Fluid injection hole, 33
・・・・・・Aperture part, 34 ・・・Porous cylinder,
35, 36... Connecting portion, 37... Starting end of yarn passage of fluid twisting element, 38... Opening.

Claims (1)

[Scope of Claims] 1. The core yarn, which is twisted by a fluid twisting element and runs approximately at the axial center of the fluid twisting chamber, is made of a substantially untwisted continuous multifilament yarn. The fluid is injected into the fluid stirring chamber in the tangential direction of the yarn passage at a speed that is more than three times the core yarn supply speed, and the opening rate at the bottom of the yarn injection hole is 45%.
After temporarily staying in a small chamber having a bottom surface with a porous surface of 0% or more, the core yarn is merged with the core yarn, passed through the fluid twisting element, and the core yarn is untwisted. A method for producing spun yarn-like yarn, which is characterized by intertwining filaments with yarn. 2. A fluid twisting chamber having a thread injection hole opened tangentially to the thread passage and a fluid twisting element are arranged in order along the thread passage in the traveling direction of the running core thread. An apparatus for producing spun yarn-like yarn, characterized in that the bottom of the yarn injection hole forms a small chamber having a porous bottom surface with a porosity of 45% or less and 0% or more.