JPS6151463A - Yarn take-up device - Google Patents

Abstract

PURPOSE:To prevent a yarn in running from being shaken and thereby prevent the yarn from being entangled by providing a concomitant flow moderating member in close vicinity to a region of producing a concomitant air flow on a peripheral surface of a godet roller in the captioned yarn take-up device for high speed spinning having said godet roller arranged therein. CONSTITUTION:In a high speed spinning yarn take-up device M, a yarn 3 discharged from a spinneret is cooled by cold air, and oiled in the course of advancement thereof froma spin tube 1 to an oiling roller 2. Thereafter, the yarn is adapted to pass through first and second godet rollers 4, 5 and traversed through a traverse mechanism 6, and in succession wound on a bobbin B rotated by a friction roller 7 as a package 8. Hereupon, lamellar moderating members 10 are respectively provided on the take-up device M in close vicinity to a region of producing concomitant air flow or the respective godet rollers 4, 5. Each of the moderating member 10 is formed to have substantially the same width or slightly wider as that L of each of the rollers so as to be able to cover substantially the whole region of the godet rollers 4, 5 widthwise thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a yarn take-up device for high-speed spinning which is provided with a godet roller, and particularly to a yarn take-up device for high-speed spinning that is provided with a godet roller, and in particular to a device for preventing the running yarn from wobbling caused by the high-speed rotation of the godet roller. The present invention relates to a yarn take-up device that can prevent entanglement and yarn breakage between running yarns and reduce power consumption.

[Conventional technology]

When producing synthetic fibers, P obtained by high-speed spinning
A production system in which OY is supplied as yarn for drawing and false twisting is becoming established. In particular, the production volume of POY is increasing because thermoplastic synthetic fibers such as polyester and polyamide have a high degree of orientation through high-speed spinning, and yarns with little change over time can be produced. In the production of such POY, in order to ensure stable quality and productivity, it is essential to stabilize the running of the yarn running at high speed.

FIG. 7 shows an example of a winding portion of a conventional high-speed spinning take-off device. Yarn 3 discharged from a spinneret (not shown)
After being cooled by cold air at the bottom of the spinneret, it is discharged from the bottom of the spin tube 1 and transferred to the take-up device M installed on the floor F.
The oil is applied by the oiling roller 2.

and the lower first godet roller 4. The second godet roller 5 is then passed through the second godet roller 5 provided at the stop position on the side of the first godet roller 4, is traversed by the traverse mechanism 6 below, and is placed as a package 8 on the bobbin B which is driven and rotated by the friction roller 7. It is wound up. The first godet roller 4 and the second godet roller 5 each rotate in the direction of the arrow as shown in the figure to run the yarn 3 on their circumferential surfaces, but at the same time, accompanying air is generated on their circumferential surfaces due to the high speed rotation of the godet rollers. The flow collides with the running yarn 3, causing the yarn to sway. If the yarn sways excessively, the yarns will become entangled with each other between running yarns, causing yarn breakage, and will also induce yarn sway on the oiling roller 2, causing uneven oiling to the yarns 3. As a result, operability will be reduced. As a preventive measure against such a situation, a yarn take-up method without a godet roller was sometimes used for high-speed spinning.

However, this method has the essential drawback of yarn unevenness due to the reciprocating drive of the traverse mechanism 6, and therefore, as a yarn take-up device for high-speed spinning, a method of taking the yarn through a godet roller is still the mainstream. It has reached this point.

[Problems to be Solved by the Invention] By the way, as one measure to prevent yarn sway, a method has been considered in which a guide roller 9 is provided on the yarn entry side of the first Godet roller 4 to restrict yarn sway, but Since yarn damage is likely to occur when the yarn 3 repeatedly separates from and comes into contact with the guide 9, it is not preferable to provide a regulating guide for yarns that run at high speed. At that point, the roller width should be increased to widen the thread spacing.
Attempts have been made to trap the yarn so that it does not become entangled with adjacent yarns even if the yarn sways. If the spacing between yarns is widened, entanglement is less likely to occur. However, as a means of increasing productivity, in recent years, as a means of rationalizing equipment, equipment for spinning take-off equipment has been considered in the direction of dividing the spun yarn into as many parts as possible and winding them. It is said that the methods described above are also ineffective as a means of solving the problem.

An investigation of the accompanying air flow generated by a high-speed rotating Godets (o-ra) reveals the following.

That is, FIGS. 8(a) and 8(b) show the first godet roller 4.
FIG. 8(a) is a schematic diagram showing the distribution of accompanying airflow generated on the zero circumferential surface, and FIG. 8(a) shows the rotation direction of the first godet roller 4 and the eighth
Figure (b) shows the wind speed distribution with respect to the traveling direction of the yarn 3 entering the roller. For example, the first godet roller 4 rotates in the direction of the arrow at a circumferential speed of 4200 m/min, and as shown by the broken line, a strong wind of about 12 m/sec is applied to the circumferential surface of the first godet roller 4, which has a substantially perfect circular wind speed distribution, which is the same as that of the godet roller. It's blowing in the direction of rotation. When this strong wind blows against the yarn 3 on the entry side of the first Godet roller 4, the wind speed distribution becomes as shown by the broken line in the graph of FIG. 8(b), colliding with the yarn 3 and causing the yarn to sway. Become. That is, the vertical axis in FIG. 8(b) shows the yarn 3 entering toward the contact point O with the first godet roller 4. This accompanying flow hardly acts on the yarn 3b leaving the first godet roller 4, but it acts particularly strongly on the yarn 3 on the entry side, and the stronger the accompanying flow, the more the stability of the running yarn is disturbed. As a result, the yarn swing on the Godet roller also increases accordingly. Incidentally, attempts have been made to prevent yarn wrapping during high-speed spinning, as shown in FIG. 9, for example. That is, FIG. 9 shows a yarn take-up device for high-speed spinning shown in Japanese Patent Publication No. 55-7588.
A separating plate 11 is provided along the second godet roller 5 between the two and the second godet roller 5 to prevent the yarn 3 running on the yarn running path from being wrapped around the second godet roller 5. However, the separating plate 11 originally reduces the influence of the wind in the negative pressure region caused by the 50 rotations of the second godet roller 5 when the yarn tension directly under the spin tube 1 decreases, so that the yarn is transferred to the second godet roller 5. Since the purpose is to act as a shielding plate to prevent threads from wrapping around the threads, it is completely useless for preventing the yarn from swinging around the godet roller when an air entrainment flow occurs.

[Means for solving problems]

The present invention has been made in view of the above-mentioned circumstances, and is intended to prevent the running yarn from shaking caused by the high-speed rotation of the godet roller in a yarn take-up device for high-speed spinning that is provided with a godet roller. It is an object of the present invention to provide a yarn take-off device which can prevent entanglement between running yarns and cause yarn breakage, and can reduce power consumption.

The configuration of the present invention that achieves the above object is that, in a yarn take-up device for high-speed spinning, which is provided with a godet roller, the accompanying air flow generation area on the circumferential surface of the row 2 generated by the high-speed rotation of the godet roller is provided. The gist of the present invention is that the accompanying flow mitigating member is provided so as to cover almost the entire area of the godet roller in the width direction.

[Effect]

During the production of synthetic fibers, a substantially perfect circular high-speed accompanying air flow is constantly generated on the circumferential surface of the godet roller of the yarn take-up device for high-speed spinning, which covers the circumferential surface due to the high-speed rotation of the roller. Since the apparatus of the present invention is provided with an accompanying flow mitigation member that partially blocks the accompanying air flow in proximity to the accompanying air flow generation area on the circumferential surface of the godet roller, the thread running on the circumferential surface of the godet roller passes through the entrained air flow area. It is possible to reduce the influence of the wind during running as much as possible, preventing the running yarn from shaking.
This prevents entanglement between running yarns and the occurrence of yarn breakage, allowing for smooth outer yarn take-up force.

〔Example〕

FIG. 1 is a front view showing a high-speed spinning take-off device according to the present invention;
FIG. 2 is an enlarged front view of the same main part, and FIG. 3 is a side view of the same. The yarn 3 discharged from the spinneret (not shown) is cooled by cold air at the lower part of the spinneret, travels from the spin tube 1 to the oiling roller 2, coats it with oil, and then passes to the first godet roller 4 below. Then the first godet roller 4
The package 8 is passed through a second godet roller 5 provided at an upper position on the side thereof, is traversed by a traverse mechanism 6 below the second godet roller 5, and is wound as a package 8 onto a bobbin B driven and rotated by a friction roller 7. The configuration of the take-up device M is similar to the conventional device shown in FIG. The first godet roller 4 and the second godet roller 5 each rotate in the direction of the arrow as shown in the figure, and run the thread 3 on their circumferential surfaces at high speed.

In FIG. 1, relaxation members 10, 10 are provided on the take-off device M adjacent to the accompanying airflow generating areas of the first godet roller 4 and the second godet roller 5, respectively. As shown enlarged in FIGS. 2 and 3, this embodiment shows a plate-shaped relaxation member 10 as the relaxation member 10, but the relaxation member 10 is not limited to a plate-like shape. The shape of the member is not limited as long as it can be relaxed. The relaxation member 10 has a width that is approximately the same as the width of the godet roller or is slightly wider than the godet roller so that it can cover almost the entire area in the width direction of the godet roller.
A is provided. On the other hand, a cylindrical pivot member 10b is fitted in a corresponding position on the take-up device M, and the shaft portion 10
It is constructed so that a can be inserted into it, pivoted so as to be rotatable, and fixed in place. Furthermore, if a gap of several cylinders is provided between the curved surface of the godet roller and the relaxation member 10 during installation, it is possible to prevent damage when the thread wraps around the circumferential surface of the godet roller. Also, when the wound yarn collides with the relaxation member 10, the impact causes the relaxation member 10 to move in the direction of arrow Y.
It is desirable that the shaft portion 10a and the pivot member 10b be fixed in a safe structure so that they can be reversed in the direction.

Figure 4 is a schematic diagram showing the distribution of accompanying airflow generated at the surface of the godet roller with the relaxation member attached, and Figure 4(a)
4(b) shows the direction of rotation of the first godet roller 40, FIG. 4(b) shows the traveling direction of the yarn entering the first godet roller, and FIG. 4(c) shows the wind speed distribution in the width direction of the first godet roller. For example, if the relaxation member 10 is not provided on the rotation of the first godet roller 4 that rotates at a circumferential speed of 4200 m/min, the rotation speed will be approximately 12 m/min as shown by the broken line in FIG. 4(a).
The distribution of strong winds that used to blow approximately in a perfect circle at that point changes to a distribution similar to a solid line by providing the relaxation member 10. That is, by providing the relaxation member 10, the yarn 3 entering the first godet roller 4 is not blown by strong wind. The vertical axis in FIG. 4(b) shows the yarn 3 entering toward the contact point 0 with the first godet roller 4, but the wind speed that the yarn 3 receives is about several meters per second, and the broken line It can be seen that the wind speed experienced by the entering yarn 3 is significantly different from the wind speed when the relaxation member is not provided as shown in FIG. It has been confirmed that as a result, the swinging of the yarn 3 is extremely reduced. In other words, when the relaxation member 10 was not provided, the yarn swayed horizontally in the direction of travel with a width of 2 to 3 mm or more, but now the yarn sways with a width of 1 mm or less, to the point where there is almost no yarn sway. Diminished. As a result, tangles between yarns on the godet roller were eliminated, leading to a reduction in the number of yarn breakages. For example, a relaxation member having a height of 150 nm was attached to a godet roller having a diameter of 200 mm with a gap of 5 mm between the godet roller and the relaxation member. In this state, when the circumferential speed of the godet roller was set to 4300 m/min and the polyamide fiber thread of 30D/10f was divided into eight parts and run, each thread was able to run with a sway width of 1 mm or less, and the thread on the godet roller was run. There was no occurrence of tangles between the rows, and no occurrence of yarn breakage due to yarn shaking.

As a result, the number of thread breakages per spinner per day was 0.08
The number of yarns could be reduced from 0.06 to 0.06, and the yarn could be taken off smoothly. Figure 5 shows the length L of the Godet roller.
This figure shows the results of measurements regarding the relationship between the power consumption and the power consumption. In the case where no relaxation member is provided, the power consumption is high because the accompanying air flow around the godet roller is also rotated. -Although the length of the godet roller was required to be 180 mm to cause the yarn to sway, by providing the relaxation member, the required length of the godet roller is 140 mm, which is sufficient, and the power consumption is also reduced as shown by the dashed-dotted line.

FIG. 6 shows an example in which the relaxation members 10 are provided at two locations on the circumference of the godet roller. Due to space constraints, the relaxation members 10 can be attached at up to four locations on the circumference of the godet roller. It has been confirmed that as the number of relaxation members 10 increases, the yarn sway tends to decrease significantly.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to prevent the running yarn from swinging caused by the high-speed rotation of the godet roller, thereby preventing entanglement between the running yarns and occurrence of yarn breakage, and power consumption. It was possible to provide a yarn take-off device that can reduce the amount of yarn.

[Brief explanation of the drawing]

Fig. 1 is a front view of a high-speed spinning take-off device according to the present invention;
The figure is an enlarged front view of the same main part, Figure 3 is a side view of the same, Figure 4 (a
) is a schematic front view showing the distribution of the air entrainment flow generated in the phase of the godet roller, Fig. 4(b) is a schematic side view showing the distribution of the air entrainment flow, and Fig. 5 shows the relationship between the length of the godet roller and the power consumption. A graph showing the relationship, FIG. 6 is a perspective view showing another embodiment, FIG. 7 is a front view showing the conventional device, and FIG. 8 shows the distribution of air accompanying flow generated on the circumferential surface of the godet roller. The schematic diagram and FIG. 9 are front views showing another conventional device. 1... Spin tube 2... Oiling roller 3
... Yarn 4 ... First Godet roller 5
...Second Godet roller 6・-) ;ly Perth 41J 7...Friction roller 8...Package 10...Relaxation member F...Floor M...Take-up device B...Bobbin Σ m- ÷ Mock procedural amendment (spontaneous) October 17, 1980 1, Indication of the case 1982 Patent Application No. 169735 2, Name of the invention Yarn pulling device 3, Person making the amendment Relationship to the case Patent application Person: 2-2-8 Dojimahama, Kita-ku, Osaka (316) Toyobo Co., Ltd. Representative: Chatani Department 4, Agent: Shinko Building (1), 2-3-7 Dojima, Kita-ku, Osaka 530 Correct the specified parts of the book according to the attached errata. (2) Replace Figure 5 with the attached sheet. Figure 5 O No mitigation material L (mn) Procedural amendment (method) % formula % 1. Indication Patent Application No. 169735 of 1982 2, Name of the invention Yarn take-up device 3, Relationship with the case of the person making the amendment Patent applicant 2-2-8 Dojimahama, Kita-ku, Osaka (316) Representative of Toyobo Co., Ltd. Person: Shujibe Chatani 4, Agent: Shinko Building, 2-3-7 Dojima, Kita-ku, Osaka 530 January 29, 1985 (shipment date) 6. Detailed description of the invention in the specification to be amended ” and “Brief Description of Drawings” columns and Drawing 7, contents of amendment (1) “Line direction...” in lines 2-3 of page 10 of the specification.
・Correct 4200J to the following sentence. ``Graph showing the wind speed distribution in the row direction, Figure 4 (c) is the first
Plan view of the godet roller seen from one side, Figure 4(d)
is a graph showing the wind speed distribution in the traveling direction of the yarn entering the first godet roller. For example, 4200J (2) "Air accompanying flow..." in the first line of page 13.
Figure 5 is corrected to the following sentence. [ is a graph showing the wind speed distribution in the traveling direction, Fig. 4(c) is a plan view of the first godet roller seen from above, Fig. 4(d)
) is a graph showing the wind speed distribution in the traveling direction of the yarn entering the first godet roller, and Fig.
)” will be added. Fig. 4 (C) Fig. 5 ○, -1 No relaxation member 140' 160 180 L (mn) Fig. 4 (d) Fig. 6

Claims (1)

[Claims] In a yarn take-up device for high-speed spinning, which is provided with a godet roller, an entrained air flow mitigation member is placed close to the entrained air flow generation area on the circumferential surface of the roller, which is generated by the high speed rotation of the godet roller, so that the entrained air flow reducing member is placed in the vicinity of the width of the godet roller. A yarn take-up device characterized in that it is provided so as to cover almost the entire area in a direction.