JPS5932571B2 - Device to bulk up yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for increasing the bulk of a yarn, which is an aggregate of a large number of single yarns, 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 creating loops or entanglements in single yarns through a disturbance action in a turbulent region of fluid, and many methods and devices for this purpose have been proposed so far.

A typical device is, for example, a cylindrical device through which thread and fluid pass simultaneously (for example, Japanese Patent Publication No. 38-2828).

Generally, the thread enters the housing from one end of the device through a centrally directed pipe-like threading section, and the pressurized fluid enters the housing through a fluid inlet at right angles to the housing, approximately in the center of the housing. It moves forward while enveloping the threading section from all sides, and reaches the fluid disturbance chamber.

At the outlet end of the housing there is a thread treatment section through which the thread and fluid passes to treat the ejected thread with the fluid and generate a large number of loops.

Conventional devices like this generate many loops,
The disadvantage is that 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, a device (Japanese Patent Publication No. 44-6158
) or a device (USP 354
5057) has been proposed.

However, in the former device that eccentrically sets the threading part and the fluid disturbance chamber, the adjustment of the degree of eccentricity is extremely delicate, and it is difficult to adjust and assemble the threading part and the fluid disturbance chamber to the optimum position. The disadvantage is that it takes a long time to adjust.

Furthermore, it is necessary to adjust the characteristics of each weight to obtain a homogeneous thread, but in reality this adjustment is extremely difficult.

Furthermore, although the latter device in which a fluid passage is restricted at the edge of the needle has been able to achieve an improvement in the speed of bulking the yarn compared to the conventional method, it has not always been sufficient from an industrial standpoint.

The present invention aims to overcome all of these drawbacks of conventional devices.

That is, the first object of the present invention is to provide a bulking device that can impart bulkiness to a yarn by creating loops in the yarn at an extremely high speed and with extremely high fluid utilization efficiency compared to conventional devices. be.

A second object of the present invention is to provide an apparatus in which the assembly work can be completed extremely easily when the parts are assembled to form a completed apparatus.

The object of the present invention is to provide a pipe-shaped pipe having a hole extending from one end to the other end, the outer periphery of the end of the thread on the exit side is tapered, and at least one of the tapered ends is tapered. A threading part that partially has a concave part, a thread processing part that is located on the thread exit side of the core threading part and consists of a tapered conical fluid disturbance chamber, a cylindrical or open-ended thread, and a fluid ejection mechanism. , and at least within a range that includes the threading portion and the thread processing portion and is surrounded by each extension line connecting both edges of the concave portion of the tapered tip of the threading portion and the central axis of the threading portion. This is achieved by a thread bulking device characterized in that it includes three parts of the housing, which are provided with a portion of a narrow fluid passage.

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

In FIG. 1, a pipe-shaped threading section 1 has a thread inlet 4 at one end and a thread outlet 5 at the other end, and is penetrated by a hole 12. There is a tip 7 and a recess 6 in a part thereof.

On the thread exit 5 side of the threading section 1, there is a thread processing section 2 consisting of a tapered conical fluid disturbance chamber 10, a cylindrical passage extending from the fluid disturbance chamber 10, and an open-tip thread and fluid ejection mechanism 11. The threading part 1 and the thread processing part 2 are assembled by being completely enclosed in the housing 3 and fixed with screws.

The fluid enters the housing from the inlet 8, is supplied through the narrow fluid passage 9 to the fluid disturbance chamber 10, and after disturbing the thread exiting from the thread outlet 5 of the threading section 1, the fluid and thread are ejected. The thread is discharged from the mechanism 11 to the outside of the apparatus together with the thread.

Here, "the recess in the tapered tip of the threading part" refers to a semicircular groove bored in the tapered tip, a U-shaped groove,
It means a notch such as a letter-shaped groove, and "at least a part" means a groove that penetrates from the thick part to the thin part of the tapered tip, or a groove that opens only on the thick part side. This term refers to all types of grooves, such as those with grooves that are open only in the narrow part, or those that have no open end of the groove in the image area.

Although FIGS. 1 and 2 show a semicircular groove shape as the recess, FIGS. 3 to 8 show other forms of the recess.

3, 5, and 7 are sectional views of the main parts of the tapered tip, and FIGS. 4, 6, and 8 are sectional views of the tapered tip, respectively.
FIG. 7 is a front view of FIG. 7;

In FIGS. 3 and 4, the semicircular recess 6 starts from the thick part at the base of the tapered tip 7 of the threading section 1 and ends at approximately the center of the tapered tip, and FIG. 6 shows a ■-shaped recess 6 penetrating from the thick base of the tapered tip 7 to the tapered part, and in FIGS. 7 and 8, a semicircular recess 6 is shown. It is applied along the circumferential direction approximately at the center of the tapered tip.

If there are multiple recesses, the outermost end of the recess (2
It is necessary that the angle formed by the line segment connecting the central axis of the threading section (the center of the exit of the thread) to the center axis of the threading section (the center of the exit of the thread) is within 120 degrees, preferably within 90 degrees.

This will be explained as follows using FIG. 9, which shows a projected view of the tapered tip of the threading portion 1 in the device of the present invention in which a plurality of recesses 6 are provided.

Now, suppose there are two concave parts 6, and there are 6a, 6a,
Marked 6 b, with each outermost edge marked 6'
a, 6'b, and connect these and the central axis 5c of the threading part (also the center of the thread outlet 5) with straight lines X and Y, and let the angle between them be θ. , preferably within 90°.

Also, when the two recesses 6a and 6b are in contact, the outer edges 6'a and 6'b corresponding to 6a and 6b are connected to the central axis 5c of the threading part according to the above. The angle θ between the obtained straight lines X and Y is set in the above range.

As a result of detailed studies by the present inventors, it has been found that when the recesses are unevenly distributed in a range where θ is wider than 120°, the amount of loops generated is small, and the amount of loops generated is uneven in the longitudinal direction of the yarn.

Furthermore, since the loops have a weak entanglement strength and have the disadvantage that when the thread is stretched, the loops disappear or the number of loops decreases, it is preferable that θ is within 120°.

Furthermore, if the positions of the recesses are unevenly distributed within a range of 900 mm, looseness will occur uniformly in the length direction of the yarn, and the shape of the loop, especially the distribution of the thickness of the loop, can be made as desired by setting the conditions. It has the feature that a yarn with a distribution of loop sizes can be obtained.

The length of the threading portion 1 and the diameter of the hole bored in the center are not particularly limited, and the diameter of the hole at the thread exit 5 at the tip is preferably as small as possible.

In addition, the outer diameter of the threading part is not particularly limited, but it is necessary that the tip has a tapered tip, and the apex angle of the tapered tip in a longitudinal cross-sectional view is 20° to 90°.
° is preferred.

Although the size of the housing 3 and the diameter of the fluid inlet 8 are not particularly limited, dimensions that cause a small decrease in royal force at the fluid inlet 8 are preferred.

The shape of the narrow fluid passage 9 is not particularly limited.

By the way, "corresponding to the position of the concave portion of the tapered tip of the threading section" as stated in the present invention means that the fluid passage is in direct contact with the threading section in the transverse direction of the threading section. or without contacting the threading part... Even if a fluid passage is provided in the housing, both edges of the tapered tip of the threading part and the threading part means that a fluid passage or a group of passages are unevenly distributed within the range surrounded by each extension line connecting the central axis of the fluid passage.

In the present invention, the outlet of the narrow fluid passage 9 needs to be biased to one side on the outer periphery of the threading section 1, and is located at a position where the concave portion of the tapered tip of the threading section 1 exists. It is necessary to be located biased towards the corresponding surroundings.

That is, the thread outlet 5 of the threading part 1, the tapered tip 7
The positional relationship between the recess 6 and the narrow fluid passage 9 can be better understood from the sectional view taken along line A--A in FIG. 1, ie, FIG. 2.

In other words, the narrow fluid passage 9 opens toward the periphery corresponding to the position where the recess provided at the tapered tip of the threading portion 1 exists.

Also, the outlet of the narrow fluid passage 9 and the thread outlet 5 of the threading section 1
Although the distance from each outlet to the tip is not limited, the distance E from each outlet to a line perpendicular to the central axis of the threading portion 1 is preferably 5 to 20 m, and particularly preferably 8 to 15+++ m.

By the way, in the case where only one narrow fluid passage 9 is provided, if the four tapered tip portions 6 of the threading portion 1 are positioned on the side where the narrow fluid passage is provided, uneven distribution will inevitably occur. become.

On the other hand, even if there are a plurality of narrow fluid passages 20, they must be unevenly distributed around the position corresponding to the position where the concave portion of the tapered tip of the threading portion 1 exists, It is necessary that the angle formed by the line segment connecting the center point of the fluid passage and the axis of the threading portion be within 120°, preferably within 1 to 90°.

This will be explained as follows with reference to FIG. 10, which shows a cross section corresponding to the section B-A in FIG. 1 in the device of the present invention in which a plurality of narrow fluid passages 9 are provided.

Assume now that there are three narrow fluid passages 9, and these are marked with symbols 9a, 9b, and 9c, and the center points 9'a and 9'c of the fluid passages 9a and 9c, which are located on the outside, respectively. and the central axis 5d of the threading section 1 (which is also the center of the thread outlet 5) are connected by straight lines X' and Y' and the angle they make is θ', then this θ' is within 120°, preferably The angle should be within 90°.

Also, when the narrow fluid passages 20a, 20b, and 20c are continuous and become one fluid passage with a long and narrow cross section, the center corresponding to 9'a, 9'c and the thread threading The angle θ' formed by the straight lines x/ and y/ obtained by connecting the central axis 5d of portion 1 is defined as the above range.

As a result of detailed study by the present inventors, we found that when the outlet of the fluid passage is unevenly distributed in a range where θ' is wider than 120°, the number of loops generated is small, and the number of loops generated is uneven in the direction of the length of the yarn. Easy to occur.

Furthermore, since the loops have a weak entanglement strength and tend to disappear or the number of loops decreases when the yarn is stretched, θ' must be within 120°.

By the way, if the exits of the passages are unevenly distributed within a range of 90 degrees, loops will occur uniformly in the length σ direction of the yarn, and the shape of the loops, especially those with a small distribution of sizes, can be formed as desired depending on the condition setting. It has the feature that a yarn with a distribution of loop sizes can be obtained.

In addition, the cross-sectional area of the narrow fluid passage 9 (if there are multiple fluid passages 9, the total cross-sectional area)
It is preferably 0.5 to 9 times the cross-sectional area at the smallest part.

The fluid disturbance chamber 10 of the yarn processing section 2 needs to have a tapered conical shape as shown in FIG. 1, and its apex angle is 20° to 9.
0° is preferred 8 Furthermore, the yarn and fluid ejection mechanism 11 of the yarn processing section 2 must be cylindrical or open-ended, and the apex angle thereof is preferably 00 to 30°.

The apparatus of the present invention can be used to add loops to spun yarns made of filaments or stables made of any natural fibers, regenerated fibers, semi-synthetic fibers, 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, saturated steam, or superheated steam, but is not limited thereto.

When using the apparatus of the invention, yarn is over-fed into the apparatus, but the rate of over-feed depends on the characteristics of the yarn being processed and the quality of the product obtained.

When bulkiness is imparted by combining two or more types of yarns, processing can also be carried out by supplying an excess of the remaining number of yarns to an arbitrary number of yarns.

Although the morphology and various properties of the yarn produced by the apparatus of the present invention also depend on the amount and velocity of the fluid, the rate at which the yarn can be processed, the type and properties of the fibers, the dimensions of the various parts of the apparatus are of paramount importance.

Among them, the outer diameter of the straight part of the threading section 1, the outer diameter of the tip, the apex angle of the tapered tip 7 of the threading section 1, the size of the recess 6 formed in the tapered tip 7, and the thread processing section 2. The apex angle of the fluid disturbance chamber 10 and the inner diameter of the narrowest part of the fluid ejection mechanism 11 are important factors, and the fineness is 30 to 300D.
When processing polyester multifilament yarn or nylon multifilament yarn for clothing to make it bulky,
Preferable dimensions of each part of the device are as follows, for example.

Regarding the threading part 1, the outer diameter of the straight part is 5 to 20 mm.The outer diameter of the tip is 3 to 8 mm.
.

, 5-3. . (In case of 1 piece of diameter) Vertical angle of fluid disturbance chamber regarding thread processing section 2: 30-80° Inner diameter of narrowest part: 1.0-4. Ornm d> Therefore, in the device of the invention, the dynamic pressure of the fluid on one side of the threading section 1 can be made significantly higher compared to the other side, with the result that the thread exit 5 of the threading section 1 The thread that comes out of the thread is extremely bent toward the side where the concave part 6 of the tapered tip 7 of the threading part 1 and the narrow fluid passage 9 are present, and the thread is opened and separated into single filaments (which is strong for the thread). Since torque and vibration are generated, bulk can be imparted at extremely high speeds.

Furthermore, since the bias in the injection of fluid into the fluid disturbance chamber 10 is determined by the relative positional relationship between the recess 6 located at the tapered tip 7 of the threading section 1 and the narrow fluid passage 9, You can easily find the optimal positional relationship between the two without having to make subtle adjustments to the positional relationship with processing part 2! 2J, it is extremely easy to assemble.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a bulking device according to the present invention. FIG. 2 is a cross-sectional view taken along line A--A in FIG. 3, 5, and 7 are longitudinal sectional views of main parts of the tapered tip of the threading portion 1, showing other aspects of the present invention. FIGS. 4, 6, and 8 are front views of FIGS. 3, 5, and 7. FIG. 9 is a projected view of the threading portion 1 viewed from the thread exit direction when a plurality of recesses are present in the present invention. Figure 10 shows Figure 1 A- when there are multiple fluid passages.
FIG. 1...Threading part, 2...Thread processing part, 3...Housing, 4...Thread entrance, 5...Thread outlet, 6... recess, 7.
...Tapered tip, 8 ... Fluid inlet, 9 ... Narrow fluid passage, 10 ... Fluid disturbance chamber, 11 ... Thread and fluid ejection mechanism, 1
2...hole.

Claims (1)

[Claims] 1 A pipe-shaped pipe with a hole extending from one end to the other, the outer periphery of the end of the thread on the exit side is tapered, and at least a part of the tapered end has a recess. a threading section, a thread processing section located on the thread outlet side of the threading section and consisting of a tapered conical fluid disturbance chamber, a cylindrical or open-ended thread, and a fluid ejection mechanism; and the threading section. and the thread processing portion, and at least a portion of a narrow fluid passage within a range surrounded by each extension line connecting both edges of the concave portion of the tapered tip of the threading portion and the central axis of the threading portion. 1. A device for bulking yarn, comprising three parts of a housing.