JPH0153364B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of the Invention> The present invention relates to a method and apparatus for manufacturing slab yarn. More particularly, the present invention relates to improvements in methods and apparatus for producing slab yarns utilizing fluid nozzles, particularly turbulent flow nozzles.

<Prior art> A slub yarn in which thickness is varied in the longitudinal direction by changing the amount of supply of one or more yarns to a turbulent nozzle is disclosed in Japanese Patent Publication No. 13020/1973.
It is known from Japanese Patent Publication No. 48-30023.

According to these methods, parts having bulkiness that is larger than the apparent size (effect part) and parts having bulkiness smaller than this (ground part) are alternately provided, and there are many variations in appearance and texture. A slub yarn is obtained. However, the characteristics of such slab yarns are significantly affected by the processing speed, and generally, at processing speeds of 90 m/min or less, the reproducibility is
The above yarn is obtained. On the other hand, the processing speed is 100
m/min, it becomes virtually impossible to obtain the desired slub yarn. The reason for this is that in the above method, the intermittent overfeed state necessary to obtain the effect part is replaced by an instantaneous speed increase by an electromagnetic clutch (Japanese Patent Publication No. 13020/1973) or by a rotating cut-off to increase speed by an electromagnetic clutch. Since the transmission is transmitted to the cam and the cam creates an intermittent overfeed state of the yarn through the reciprocating hook (Japanese Patent Publication No. 48-30023), it is particularly suitable for high-speed machining of 150 m/min or higher. In this case, the constant speed supply of yarn and the intermittent overfeed state cannot be stably induced. Especially the latter Tokkosho
In the method described in Publication No. 48-30023, at the moment when the yarn is over-fed intermittently, as shown in Figure 5 of the same publication, the hook suddenly falls down along the notch, so the yarn is damaged before and after the hook. This has the disadvantage that the amount of overfeed is difficult to absorb smoothly because it sag all at once. Furthermore, the most preferable shape of the slab part is a spindle-shaped one, and for this purpose, it is ideal that the overfeed amount increases step by step, but in the method shown in FIG. It is difficult to obtain spindle-shaped slabs at high speeds because of this.

<Object of the invention> The object of the invention is to stabilize the constant speed supply of yarn to the turbulent flow nozzle and the supply state by intermittent overfeed even when the processing speed is increased compared to the conventional one, and to produce high quality slub yarn. An object of the present invention is to provide a method and apparatus for manufacturing a slab yarn that enables manufacturing.

<Structure of the Invention> As a result of intensive research in order to achieve the above object, the present inventors brought a rotating body capable of deflecting the yarn path into direct contact with the yarn in a constant overfeed state between two rollers. The above-mentioned overfeed is absorbed (yarn accumulation) and released (intermittent overfeed state) during one rotation of the rotating body, and the former is linearly absorbed and the latter is released like a quadratic curve. By doing so, we succeeded in solving the problems associated with high-speed machining mentioned above.

Thus, according to the present invention, the yarn is supplied to the turbulent flow nozzle while overfeeding the yarn between the two rollers due to the peripheral speed difference between the rollers, and the yarn is further fed in a direction substantially perpendicular to the direction of travel of the yarn. When the rotating body is brought into direct contact with a rotating body that causes deflection, and the overfeed is absorbed and released during one rotation of the rotating body, the absorption and release of the overfeed by the rotating body is rotated. Angle ratio of 3:1 to 17:1
Slab yarn production and supply roller, a rotating body on which the yarn runs in direct contact with the outer circumferential surface of the roller and deflects the yarn path;
In a slab yarn manufacturing apparatus comprising a turbulent flow nozzle and a take-up roller that rotates at a circumferential angle lower than that of the supply roller, the deflection rotating body is a disc-shaped rotating body having a notch, and is arranged at a constant circumferential angle. On the other hand, it consists of a circumferential part Rf in which the amount of increase in radius increases linearly and a circumferential part Ru in which the amount of decrease in radius increases in a quadratic curve, and the circumferential angle ratio of Rf and Ru is 3:1 ~ A slab yarn manufacturing apparatus is provided which includes a deflection rotor for a yarn path having a ratio of 17:1.

The present invention will be explained below with reference to the accompanying drawings. In FIG. 1, 1 is a yarn package, 2 is a yarn package,
3 is a supply roller, 4 and 5 are thread path fixed guides, 6
is a disc-shaped guide that has a notch and deflects the thread path;
7 is a rotating shaft, 8 is a turbulent flow nozzle as shown in Japanese Patent Publication No. 34-8969, 9 is a take-up roller whose circumferential speed is lower than that of the supply roller 3, 10 is a slab yarn, and 11 is a winding package. .

In this process, the yarn 2 is fed to the supply roller 3
A constant overfeed state (usually 8% to 25%...preset overfeed amount) is maintained between the roller and the take-up roller 9, but if this state continues steadily, a uniform bulk is created in the longitudinal direction. Bulky yarn (Taslan yarn) is obtained. However, in the present invention, the disk-shaped guide 6 is provided upstream of the turbulent flow nozzle 9, and the amount of yarn 2 supplied to the turbulent flow nozzle 9 is intermittently changed, and the amount of supply is stably changed. , to obtain a well-balanced slub yarn.

Here, as the plan view of the disc-shaped guide 6 is shown in FIG. 2, a circle (indicated by a broken line) with a center O and a radius R is a deformed disc having a notch 12 as shown by a solid line. This is what I did. The feature of this disc guide 6 is that when the straight line distance from the center (rotation center) O to any point on the circumference (hereinafter referred to as radius) is γ, the value of γ is From the valley 13 of the cut portion 12 to the apex 1 along the direction of arrow A
Rf increases linearly up to point 4, decreases like a quadratic curve from point 14 to valley 12, and the amount of decrease increases as it approaches valley 12. It is. However, it goes without saying that the shape of this valley may be of various shapes, from a deep valley as shown in the drawing to a gentle valley. FIG. 3 is a developed view of the disc guide 6 in FIG. 2, and from the valley 12 to the apex 14, γ _is
increases linearly with R. Then, from the point 14 toward the valley 12, R→γ decreases by ₁ , and at this time, the initial decrease in γ is small (between 14 and 15 along arrow A), but from the middle there is a sharp quadratic curve. target decrease (arrow A
15 and 13).

Next, we will discuss changes in the supply amount due to this disk.

Now, when the yarn 2 is traveling linearly between the yarn path fixed guides 4 and 5, the yarn is brought into contact with the valley 12 of the disc guide 6. When the disc guide 6 is then rotated counterclockwise, the yarn path is deflected in response to an increase in γ ₁ →R, and the degree of deflection is maximum at the apex 14. In other words, during this period, the amount of overfeed is absorbed between the supply roller 3 and the take-up roller 9 in the form of deflection of the yarn path (formation of slack due to accumulation of yarn), and the amount of overfeed to the turbulent nozzle is The amount of overfeed will be below the set overfeed amount. Next, the disk guide 6 rotates, and the vertex 1
4 → At valley 12, the degree of deflection of the yarn begins to decrease (overfeed starts), but at that time, the amount of decrease in γ is gradual at first, but becomes rapid from the middle, so the amount of overfeed gradually increases. It increases rapidly from the middle. In this way, when the disc guide 6 is continuously rotated, the above-mentioned state is repeated every rotation, and after the turbulence nozzle 9, a thin part...the ground part (small overfeed) and a thick part...the effect part (large overfeed). A so-called slub yarn is obtained having alternating .

Here, in the disk guide 6, the low overfeed amount is kept constant due to the linear increase of γ from γ ₁ →R, and a well-balanced ground portion is obtained, and on the other hand, γ
When reducing from R to γ, changing the amount of decrease from a small amount (small amount of overfeed) to a large amount of decrease (large amount of overfeed) will smooth the absorption of overfeed by the turbulent flow nozzle 6 and reduce the effect part. It was found that this method is effective in obtaining a so-called spindle-shaped slab, which is thin at the ends and thick at the center. For this purpose, it is necessary to absorb and release overfeed reliably and smoothly during one revolution of the rotating disk, but this requires adjusting the rotation angle ratio (θ ₁ /θ ₂ or θ 2 in Figure 1). Circumference length Rf corresponding to θ ₁ and circumference length corresponding to θ ₂
The ratio of Ru (Rf/Ru) contributes, especially θ ₁ /θ ₂
It is effective to have a ratio of 3:1 to 17:1, preferably 4:1 to 11:1. Less than 3:1 (θ ₂ >90°)
In this case, the absorption of overfeed, that is, the amount of yarn storage is not sufficient, and on the other hand, if it exceeds 17:1 (θ ₂ <
20°) - and it becomes difficult to overfeed the accumulated yarn (release the accumulated overfeed).

FIG. 4 shows a preferred embodiment of the present invention, in which a thread 2' is used as a core thread and the thread 2 is threaded thereon. In this embodiment, the yarn 2' is normally fed to the turbulent nozzle 8 with a constant low overfeed amount (7% or less), while the yarn 2' is fed with an overfeed amount while the yarn is stored by the disk guide 6. By maintaining almost the same level as that of yarn 2', the ground part where both yarn 2' and yarn 2 are mixed and intertwined under low overfeed, and the yarn over-fed to yarn 2' are removed. An effect portion in which the strips 2 are curled and has minute loops is obtained. Here, the yarn 2' is supplied with a constant low overfeed and exists as a core thread or tension retainer of the slub yarn, thereby ensuring the shape stability of the slub yarn as a whole.

Furthermore, instead of forming one slab in one rotation of the disk, a plurality of Rf and Ru may be formed in one disk.
In that case, multiple slabs can be made with one rotation of the disk, and by changing the ratio of Rf and Ru or R, various slabs can be made with one disk.

In the present invention, the material of the disc-shaped guide is not particularly limited, but aluminum alloy, stainless steel, plastic stick, etc. are suitable. Also, its dimensions are γ ₁ from 10 mm
70mm, R should be selected from the range of 50mm to 200mm.
The processing speed of this disc guide is 100m/
Min or more, it is generally sufficient to rotate within the range of 20 to 300 rpm, and there is no need to use a steady rotation speed.By changing the rotation speed appropriately, the period, thickness, and length of the slab can be It can bring about change.

Furthermore, there are no particular restrictions on the threads 2 and 2'.
Any of spun yarn, filament yarn, processed yarn thereof, etc. may be employed.

<Actions and Effects of the Invention> The actions and effects of the present invention are summarized as follows.

Since the yarn is brought into direct contact with the outer circumferential surface of the disc guide, overfeed can be absorbed and released reliably, and this effect is particularly effective in high-speed machining.

Since overfeed is absorbed linearly, a low overfeed supply rate to the turbulent flow nozzle is maintained constant, and a beautiful ground portion is formed.

When releasing the absorbed overfeed, the release amount (overfeed amount) is increased in stages, so the yarn is smoothly supplied (sucked) to the turbulent flow nozzle and a spindle-shaped slab is obtained. .

Since it is disk-shaped, various combinations such as the time ratio of slack formation and slack release, the rate of increase in slack formation, and the speed of release can be easily implemented.

Therefore, the obtained slub yarn consists of a ground part with no unevenness in thickness and an effect part that shows a natural appearance, and such slub yarn can be obtained at more than twice the processing speed of conventional methods, and the economic effect is extremely large. There is something.

On the other hand, in the feeding method disclosed in Japanese Patent Publication No. 48-30023 mentioned above, the yarn is passed through the hole of the hook guide S, so that the yarn is likely to get caught at high speeds. However, in this method, as shown in FIG. 5, the absorbed overfeed is released all at once by the hook guide S falling into the notch opening of the cam (θ=0 in the present invention). ) Therefore, during high-speed processing, yarn is easily absorbed (suctioned) into the nozzle, which tends to cause yarn breakage due to yarn clogging.

<Examples> Example 1 Using the process shown in FIG. 4, a slab yarn was obtained under the following conditions.

a Raw yarn used ●Yarn 2...Polyester false twisted yarn 100de/
48fil. ●Yarn 2'...Polyester false twisted yarn
100de/48fil.b Processing conditions ●Setting overfeed amount of yarn 2...12.5% ●Setting overfeed amount of yarn 2'...4.0% ●Disc-shaped guide 6...Material R=120mm (Fig. 2) γ ₁ = 42mm (Fig. 2) Increase rate of γ (Fig. 3) Rotation speed = 60r.pm ●Turbulent flow nozzle...●Nozzle described in Japanese Patent Publication No. 47-42068 ●Pneumatic pressure 6.0Kg/cm ²・G ●Processing speed ( Take-up roller)...150m/min c Processing result ●Slab yarn ●Ground part...Yarn 2 and 2' are mixed evenly, with no ground cracks or uneven thickness ●Effect part...Spindle-shaped slab form with minute particles on the surface - Processed yarn breakage: No yarn breakage even during day and night operation <Example> Example 2 Slab yarn was obtained using the process shown in Figure 4 under the following conditions.

a Raw yarn used ●Yarn 2...Polyester filament
50de/24fil. ●Yarn 2'...Cationic dye dyeable polyester filament yarn 50de/24fil.b Processing conditions ●Setting overfeed amount for yarn 2...9.5% ●Setting overfeed amount for yarn 2'...2.0% ●Disc guide 6...Material R=120mm (Fig. 2) γ ₁ = 42mm (Fig. 2) Increase rate of γ (Fig. 3) Rotation speed=54r.pm ●Turbulent flow nozzle...●Special Publication No. 47-42068 Nozzle as described ●Pneumatic pressure 6.0Kg/cm ²・G ●Processing speed (take-up roller)...175m/min c Processing result ●Slab yarn ●Gland part...Yarn 2 and 2' are uniformly mixed, causing cracks in the ground and thick No flaws ●Effect part: Spindle-shaped slab form with minute slabs on the surface ●Processed yarn breakage: No yarn breakage even after two days of day and night operation

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the basic steps of the present invention, and FIGS. 2 and 3 are one example of a disc-shaped guide used in the present invention.
A plan view showing an example (Fig. 2) and its developed view, No. 4
The figure is a schematic diagram showing another aspect of the present invention. 6... Disc-shaped guide, 8... Turbulent flow nozzle, γ...
...The straight line distance from the center of rotation O to any point on the outer periphery (on the circumference) of the disc-shaped guide, Rf (θ ₁ )...γ
The outer periphery (rotation angle) where Ru increases linearly, Ru
(θ ₂ )...The outer peripheral edge (rotation angle) where γ decreases in a quadratic curve.

Claims (1)

[Claims] 1. Overfeeding the yarn between two rollers due to the peripheral speed difference between the rollers and supplying the yarn to the turbulent flow nozzle, and furthermore, feeding the yarn in a direction substantially perpendicular to its traveling direction. When the rotating body is brought into direct contact with a rotating body that causes deflection, and the overfeed is absorbed and released during one rotation of the rotating body, the absorption and release of the overfeed by the rotating body is rotated. A method for producing slab yarn, characterized in that the angular ratio is between 3:1 and 17:1. 2. In a slab yarn manufacturing device comprising a supply roller, a rotating body on which the yarn runs in direct contact with the outer circumferential surface and deflects the yarn path, a turbulent flow nozzle, and a take-up roller that rotates at a peripheral speed lower than that of the supply roller, the deflection rotation As a body, it is a disc-shaped rotating body having a notch, and the circumferential part Rf exhibits a linear increase in radius for a constant circumferential angle, and the circle in which the radius decreases increases in a quadratic curve. It consists of a circumference Ru, and the circumferential angle ratio of Rf and Ru is 3:1 ~
A slab yarn manufacturing device equipped with a yarn path deflection rotating body with a ratio of 17:1.