JPH10167570A - Spun yarn drawing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely suck and discharge a spun yarn filament at cut-off of yarn at the same receiving speed as that of normal operation by providing an aspirator with cutter on the lower stream of a receiving roller and on the upper stream of 3 drawing roller. SOLUTION: An aspirator with cutter 6A of 6B is provided on the lower stream of a receiving roller 8 and the upper stream of a drawing roller 9. When cutoff of yarn is generated in a winder 14, no passing of a yarn filament Y is detected by a yarn detector 13 provided directly on the winder 14, the aspirator with cutter 6A or 6B is operated, and suction of the yarn filament Y is begun simultaneously with cut-off of the yarn filament Y. By the aspirator with cutter 6A or 6B, suction of the yarn filament Y is carried out after the yarn filament Y is passed through the receiving roller 8, hence the receiving speed of the yarn filament Y becomes the same speed of the receiving speed as that of normal operation, and the receiving speed is not changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning and stretching apparatus for spinning and winding synthetic fibers such as polyester and nylon, and more particularly, to an apparatus provided with an aspirator with a cutter for use at the time of thread breakage. is there.

[0002]

2. Description of the Related Art A spinning and drawing apparatus for spinning and winding a synthetic fiber such as polyester or nylon is shown in FIG. 1. First, a yarn spun from a spinneret 1 and passed through a heating cylinder 2. After the strip Y is cooled by the cooling device 3, the oil agent is applied by the oiling roller 5, and the oil is applied by the take-off roller 8.
Subsequently, the film is stretched by a stretching roller 9, stretched and relaxed by rollers 10 and 11, and then wound up by a winder 14.

In such a spinning and stretching apparatus, when a yarn is cut due to a switching failure in the winder 14 or the like, if the supply of the yarn is not stopped, the take-up roller 8, the drawing roller 9, the rollers 10, 11 In addition, a large amount of yarn is wound around the winder 14, which causes a failure. For this reason, the aspirator 6 with a cutter is usually installed upstream of the take-up roller 8 so as to discharge the yarn when the switching failure in the winder 14 or the yarn breakage occurs.

When a yarn break occurs in the winder 14, the yarn detector 13 detects this, and the yarn
The aspirator 6 with a cutter installed upstream of the device operates. The aspirator 6 with a cutter is arranged such that after the compressed air flows through the aspirator portion, the cutter is operated to cut the yarn, and the yarn spun from the upstream in the aspirator portion to ensure the suction of the running yarn. Aspirate the thread and discharge.

As described above, when the yarn spun from the upstream is sucked and discharged by the aspirator, the running speed of the yarn at this time and the take-up speed when the yarn is wound on various rollers and a winder during normal operation. Will be different. Normally, the traveling speed when the yarn is sucked and discharged by the aspirator is higher than the take-up speed taken by the take-up roller.

When the speed of the yarn changes, the accompanying airflow of the yarn also changes, and the ambient temperature near the spinneret changes. As a result, the yarn immediately after threading to resume operation is
There are problems such as unevenness in quality and thread breakage. In order to avoid this problem, the yarn immediately after being wound on the take-up roller is not wound up as a product, but the yarn speed is kept constant, the ambient temperature around the spinneret is stabilized, and then winding is performed. However, there is a problem that it takes time until normal operation, and the amount of loss increases.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and greatly changes the speed of the yarn spun from the spinneret when the yarn is cut due to a failure in switching the winder or the like. The present invention aims to provide a spinning and drawing apparatus capable of reliably performing suction and discharge of a yarn by an aspirator, performing a yarn hooking operation with good workability, and obtaining a stable product immediately after the yarn hooking. It is a technical issue.

[0008]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have reached the present invention. In other words, the present invention provides a spinning and stretching apparatus that cools a melt-spun yarn, applies an oil agent, takes it up with a take-up roller, subsequently draws it with a draw roller, and winds the yarn, downstream of the take-up roller and The present invention provides a spinning / drawing apparatus characterized in that an aspirator with a cutter is provided upstream of a drawing roller.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of the spinning and stretching apparatus of the present invention, FIG. 2 is a partially enlarged view of the vicinity of a take-off roller in FIG. 1, and FIG. 3 is provided in the spinning and stretching apparatus in FIG. It is a perspective view showing one embodiment of an aspirator with a cutter. The present invention relates to a spinning and stretching apparatus that cools a melt-spun yarn Y, applies an oil agent, takes it up with a take-up roller 8, stretches it with a draw roller 9, and winds it with a winder 14, downstream of the take-up roller 8. And an aspirator with cutter 6A or 6B provided upstream of the stretching roller 9.

In the apparatus of the present invention, it is necessary to provide an aspirator with a cutter downstream of the take-up roller 8 and upstream of the stretching roller 9. If there are a plurality of stretching rollers, the aspirator is provided upstream of the first stretching roller. Either 6A or 6B is provided. The aspirator with cutter 6A is provided immediately downstream of the separation roller 7A of the take-up roller 8 and between the separation roller 7B. The aspirator with cutter 6B is provided at a position downstream of the separate roller 7B.

In this apparatus, a yarn Y spun from a spinneret 1 passes through a heating cylinder 2 and is cooled by a yarn cooling device 3 and then oiled by an oiling roller 5 to be applied.
It is picked up by a pick-up roller 8. Then, it is stretched by the stretching roller 9 via the separate rollers 7A and 7B. Subsequently, between the stretching roller 9 and the roller 10, the roller 10 and the roller 11
After being stretched or relaxed between them, it passes through a turn guide roller 12 and is wound up by a winder 14.

When a yarn break occurs in the winder 14, the yarn detector 13 installed immediately above the winder 14 detects that no yarn has passed, and the aspirator 6 with a cutter is used.
A or 6B operates to start the suction of the yarn simultaneously with the cutting of the yarn. The aspirators 6A and 6B with cutters cut the yarn and, at the same time, suck the yarn Y spun from the spinneret 1 through the take-off roller 8 and discharge it when the yarn breaks.

As described above, the aspirator with cutter 6A
Or 6B, after the yarn Y has passed the take-up roller 8,
Since the suction is performed, the take-up speed of the yarn Y is the same as the speed of the take-up roller 8 during the normal operation, and there is no change in the take-up speed. Therefore, there is no change in the accompanying airflow, the ambient temperature in the vicinity of the spinneret is kept constant, and even when the operation is resumed by performing the yarn hooking, it is possible to immediately wind the yarn as a product, It is possible to reduce the amount of yarn that causes loss.

Regarding the position where the aspirator with a cutter is provided, if the distance from the take-up roller 8 becomes too long,
Since it is close to the drawing roller 9 and tension is applied to the yarn and cutting and suctioning of the yarn may not be performed well, it is preferable to provide the yarn downstream of the take-up roller 8 and at a position close to the take-up roller 8. Therefore, it is preferable to provide the cutter aspirator 6A rather than the cutter aspirator 6B.

Further, in the spinning and stretching apparatus of the present invention,
Preferably, an aspirator 6C with a cutter is provided below the oiling roller 5 and in front of the take-up roller 8, and a thread winding detection sensor 15 is provided on the take-up roller 8. That is,
If the aspirator 6A or 6B with a cutter does not sufficiently suction the yarn Y when the yarn breaks, the take-up roller 8 is wound. Therefore, a yarn winding detection sensor 15 is provided to cope with such a case. If detects the winding, activates the aspirator 6C with the cutter,
It is preferable that the yarn is cut, sucked, and discharged. When the aspirator 6C with the cutter operates, the spun yarn Y is mainly transferred to the aspirator 6 with the cutter.
Since the suction is performed at C, the aspirator with cutter 6A or 6B may not be operated.

The aspirator with a cutter has a structure as shown in FIG.
(Moving blade), 20 (fixed blade), suction port 1 for suctioning yarn
7. It has an air pipe 18 for enabling suction at the suction port 17, and a yarn discharging pipe 16 for discharging the drawn yarn. Then, as shown in FIG. 3A, during normal operation of the spinning and drawing apparatus, the yarn Y passes through the front surface of the suction port 17 and passes through the holes 21 provided in the cutters 19 and 20. I have. Then, when the yarn detector 13 detects the yarn breakage and the aspirator with the cutter operates, air flows through the air pipe 18 and the yarn Y starts to be sucked at the suction port 17 and moves as shown in FIG. Cutter 19, a blade
Moves around the hole 21 to cut the yarn. The suctioned yarn is discharged from the yarn discharging pipe 16 and stored in a waste basket or bag.

When the yarn is hooked, the suction gun is brought into contact with the yarn Y sucked by such an aspirator with a cutter, suctioned by the suction gun, and the operation of the aspirator section is stopped. Hang and wind it around the winder.

[0018]

Next, the present invention will be described in detail with reference to examples. Example 1 The spinning and stretching apparatus shown in FIG. 1 was used and provided with the aspirator with cutter shown in FIG. 3 at 6A and 6C. First, intrinsic viscosity [η] (measured at a temperature of 20 ° C. using an equal weight mixture of phenol and ethane tetrachloride as a solvent).
Polyethylene terephthalate of 1.12 is discharged from a die having a hole diameter of 0.55 mm and 192 holes at a discharge rate of 330 g / min and a spinning temperature of 300 ° C.
Then, the mixture was cooled and solidified through a heating tube at 380 ° C., and an oil agent was applied to the yarn by a roller-type oil agent application device. continue
545 m / min of the take-up roller 8
(Room temperature) Pre-stretching at 1.005 times between stretching roller 9 (room temperature), stretching at 5.60 times between stretching roller 9 and roller 10 (temperature 200 ° C), 0.980 between roller 10 and roller 11 (temperature 170 ° C)
After relaxation at double, it was wound up on a winder 14. Then, the yarn being wound on the winder 14 is forcibly cut, and the yarn is suctioned and discharged by the aspirator 6A with a cutter for 30 minutes. Then, the yarn is wound around each roller and the winder using a suction gun, and the winding is performed. Resumed. The aspirator with cutter 6C did not operate because the cutting and suction of the yarn with the aspirator with cutter 6A could be performed reliably. The time required for threading was approximately 4 minutes, and this was repeated 5 times. The number of fluffs generated at 100,000 m at the beginning of winding of the re-started yarn was counted with a warper (measured for 5 times, Average). As a result, the number of fluff was 0.

Comparative Example 1 As shown in FIG. 4, the same procedure as in Example 1 was carried out, except that a spinning and stretching apparatus provided with a cutter-equipped aspirator 6 only upstream of the take-up roller 8 was used. As a result, the number of fluff was 16.

[0020]

The spinning and drawing apparatus of the present invention can reliably perform the suction and discharge of the spun yarn at the same take-off speed as in the normal operation when the yarn breakage occurs. There is no change in the spinning atmosphere temperature, and it is possible to obtain a product with good workability and stable quality immediately after threading.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a spinning and stretching apparatus of the present invention.

FIG. 2 is a partially enlarged view in the vicinity of a take-off roller of FIG.

3 is a perspective view showing an embodiment of an aspirator with a cutter provided in the spinning and drawing apparatus of FIG. 1; FIG. 3 (a) shows a state during normal operation of the spinning and drawing apparatus without operating;
(B) shows a state in which a thread break is detected and activated.

FIG. 4 is a schematic view showing one embodiment of a conventional spinning and stretching apparatus.

[Explanation of symbols]

 6 Aspirator with cutter 8 Take-up roller 9 Stretching roller 10, 11 Roller 13 Yarn detector 14 Winder

Claims (1)

[Claims] 1. A spinning and stretching apparatus for cooling a melt-spun yarn, applying an oil agent, taking up the yarn with a take-up roller, subsequently drawing with a drawing roller, and winding the yarn, downstream of the take-up roller and drawing. A spinning and stretching device comprising an aspirator with a cutter provided upstream of a roller.