JP2672859B2 - Individual type yarn breakage processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an individual type yarn breakage processing device which is attached to a melt spinning device for synthetic fibers.

[Conventional technology]

Conventionally, in melt spinning of thermoplastic synthetic polymers such as polyamide and polyester, cooling air is blown to the yarn spun from a spinneret, and after cooling and solidification, oil is fed and wound by an oil feeding device. .

In recent years, a method of simultaneously treating a plurality of yarns with a single cooling chimney or a winding machine has been adopted to improve productivity. On the other hand, the frequency of yarn breakage tends to increase due to the increase in spinning speed, the production of high-value-added yarn, and the like, and maintaining the yield and the basic unit has become an important issue.

In the case of multiple yarn spinning in which a plurality of yarns are spun at the same time, if one yarn among the yarns breaks, the yarns spread to the adjacent yarns and the production loss increases.

Japanese Unexamined Patent Publication No. 50-136413 proposes a yarn breakage processing device for a plurality of yarns provided with a yarn breakage detector, a yarn suction device, and a yarn cutting device.

However, this proposal is a method of pulling a plurality of yarns to one place when a yarn breakage occurs and cutting and sucking all the yarns at once, and does not contribute to the improvement of the yield and the basic unit at all.

On the other hand, Japanese Laid-Open Patent Publication No. 61-127576 discloses a device for providing a yarn winding detector, a cutting device, a take-up device, and a yarn cutting detector for each yarn, and performing a yarn cutting process for each yarn. It is disclosed.
However, in this device, the cutting device and the take-up device are provided relatively close to each other on the same yarn path, and therefore, in high-speed spinning having a relatively high spinning tension or a spinning device having many yarn paths, the take-up fails and eventually In many cases, all yarns were broken.

Further, in the prior art, since it is possible to detect the yarn breakage only in the yarn unit, the single fiber cut of the multi-fiber yarn occurs in advance, and the cut single fiber falls near the cooling chimney and the other yarns are cut. It was not effective even in the case of a phenomenon in which running was interrupted and the yarn was broken.

[Problems to be solved by the invention]

The object of the present invention is to eliminate the above-mentioned problems of the prior art, and in yarn breakage in multi-yarn spinning, by reliably suctioning only the yarn in which the yarn breakage occurs, other yarns can be used up to the full penetration time. The purpose is to continue spinning and minimize loss due to yarn breakage. Further, regarding single fiber breakage, the number of times of yarn breakage can be reduced by processing before the yarn breakage.

[Means for solving the problem]

That is, the individual type yarn breakage processing device according to the first invention is
A plurality of synthetic fibers are cooled and solidified by a single cooling chimney, oiled by an oil supply device, and then a take-up device performs a take-up process. The same number of yarn breakage detectors as the number of yarns are installed between them, and the same number of yarn cutting devices as the number of yarns is provided near the cooling chimney near the oil supply device or the first convergence point. On the other hand, one suction aspirator is provided downstream of the cooling air.

A second invention is characterized in that the single fiber breakage detector according to the invention is arranged at a position close to the suction aspirator of the device according to the first invention.

〔Example〕

Hereinafter, embodiments of the individual type yarn breakage processing device of the present invention will be described with reference to the drawings.

FIG. 1 is a side view for explaining the individual type yarn breakage processing device according to the first invention, in which the oil supply device or the first convergence point in the vicinity of the cooling chimney 2 is directly below the spinneret 1. The number of thread cutting devices 4 is provided at a position close to 5 as many as the number of yarns.

Any thread cutting device may be used as long as it can cut a thread, and known or commercially available products can be applied as they are.

The installation location is preferably close to the oil supply device or the first convergence point 5, and more preferably immediately above the oil supply device or the first convergence point. When it is located below and separates from the oil supply device or the first convergence point, the yarn cut between them falls on the yarn paths and parts in the surroundings and causes suction failure. If it is too high, the traveling yarn bundle diameter becomes large and the opening of the yarn cutting device must be made large, so special measures are required. In addition, there is a drawback in that it is difficult to determine the yarn running position due to the influence of yarn shaking.

One suction aspirator 6 is provided for each cooling chimney 1 in the lee of the cooling air blown from the filter 3 of the cooling chimney 2. According to the present invention, since the cut yarns are sucked down by free fall, the suction aspirator does not need a specially assisted suction force. Therefore, the suction aspirator to be used may be a known one, but preferably has a wide mouth, and more preferably, the suction port modified into a rectangular shape or an elliptical shape in parallel with the blowing surface of the cooling chimney is a thread cut. Widen the freedom of the position where the strip falls.
When two or more suction aspirators are installed for one cooling chimney, a bridge phenomenon occurs in which two or more suction aspirators attract the same yarn, and finally clogging becomes impossible, which is not preferable.

Between the godeye rolls 9 and 10 and the winder 12, a yarn breakage detector 11
Is provided. A commercially available yarn breakage detector can be directly applied to this yarn breakage detector. In particular, the photoelectric yarn breakage detector is preferable in that non-contact detection is possible.

FIG. 2 is a side view for explaining the individual type yarn breakage processing device according to the second invention. In this device, the single fiber breakage detector 15 is shown.
This single fiber breakage detector is installed as shown in FIG.
A commercially available photoelectric switch of the photoelectric tube type is arranged at a distance that covers almost the entire width of the cooling chimney and is installed close to the suction aspirator. A structure in which the occurrence of single fiber breakage may be detected by dropping the cut single fiber by free fall and passing or staying in the sensing area of the photoelectric switch. The higher the sensitivity of the photoelectric switch, the earlier it becomes possible to detect single fiber breakage, but since malfunctions due to low molecular weight substances and thread waste in the vicinity increase, malfunctions will occur using a sequencer or timer. It is preferable to use prevention together.

Also, depending on the brand of the yarn, cold air conditions, etc., it may come into contact with the adjacent running yarn at the time of free fall, or the free fall position may be separated from the suction aspirator. 14 can also be used.

The guide plate 14 may be a flat plate such as an aluminum plate, and a notch or the like may be formed according to the situation around the mounting position. The mounting angle must be such that the cut threads or filaments slide off naturally. The upper end is preferably above the oil supply device, and when it is below the oil supply device, the mist of oil contaminates the cut yarn to make it difficult to slip.

An example of the vertical partition plate 16 is shown in FIG. This vertical partition plate is installed for the purpose of preventing the cut yarns from coming into contact with the adjacent running yarns when they naturally fall, but they are installed under the intervals of the spinneret, spinning conditions, cold air conditions, etc. It should be installed only when necessary. When installing, it is necessary to consider the workability of cleaning the spinneret surface and threading work as well as the function of preventing the yarns from coming into contact with each other.

(Operation)

In carrying out the present invention, as shown in FIG. 2, first, the thermoplastic synthetic polymer discharged from the spinneret 1 was cooled and solidified by the cold air blown from the cooling chimney 2, and was refueled by the refueling device 5. It is wound up by a winder after passing through the later Gode rolls 9 and 10.

When one of the plurality of yarns breaks during winding, the yarn break detector 11 first detects the break.

Almost at the same time as the detection, the yarn cutting device 4 for the corresponding yarn and the suction aspirator are activated. At this time, at the same time, an alarm notifies the operator of the occurrence of the yarn breakage. The yarns cut by the yarn cutting device fall by free fall while being pushed downwind by the cold air. The yarn that has fallen near the suction aspirator via the guide plate is sucked into the suction aspirator,
The other yarn is continuously wound until a predetermined full penetration time.

When single fiber breakage occurs, the broken single fiber falls near the single fiber breakage detector 15 due to cold air and free fall. Simultaneously with the detection by the single fiber breakage detector, the suction aspirator is operated to suck the falling single fiber, and the operator is notified of the occurrence of single fiber breakage by an alarm. Then, the operator may insert and return.

〔The invention's effect〕

The present invention can remarkably increase the suction success rate by adopting a means of sucking the place where the yarn, which has been broken, is dropped by cold air and natural fall when the yarn is broken in multi-yarn spinning. It has become possible.

As a matter of course, if the suction success rate is increased, the production yield is increased by relieving the yarn breakage of other yarns. The effect is greater as the number of yarns to be wound on the same equipment increases and the brand and the condition in which the number of yarn breakages increases.

Further, one suction aspirator may be installed for each cooling chimney, and since a strong suction force is not required, compressed air can be reduced, which is economically advantageous.

By disposing a single fiber break detector in the second invention, it is possible to perform suction processing of single fiber break, but in this case as well as in the first invention, it sucks where it falls by cold air and natural fall. It became possible by adopting the means of doing.

It is possible to prevent yarn breakage by performing suction processing for breaking single fibers. This is because it is possible to directly insert the sucked monofilament into the running yarn, so that the thread attaching work such as at the time of breaking the thread can be completely omitted. This has the effect of reducing the downtime of the equipment as well as the work time.

As a result, in addition to improving yield, it is easy to maintain and manage product quality by reducing the amount of work, and the number of machine interruptions is reduced, facilitating the operation of automated machinery such as auto doffer, etc. It has a remarkable effect.

[Brief description of the drawings]

FIG. 1 is a side view for explaining an individual type yarn breakage processing apparatus showing an embodiment of the first invention, and FIG. 2 is a side view for explaining an individual type yarn breakage processing apparatus showing an embodiment of the second invention. 3 is a front view near the cooling chimney in FIG. 2, FIG. 4 is a vertical partition plate,
FIG. 5 is a perspective view showing an example of a single fiber breakage detector. 1: Spinneret, 2: Cooling chimney, 3: Filter, 4: Thread cutter, 5: Oiling device or first convergence point, 6: Suction aspirator,
7: Waste thread box, 8: Spinning cylinder, 9, 10: Gode roll, 11: Thread break detector, 12: Winder touch roll, 13: Package being wound, 14: Guide plate, 15: Single fiber break Detector, 16: Vertical partition plate, 17: Light emitting part, 18: Light receiving part, 19: Cut single fiber.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-9416 (JP, A) Sekikai Shou 60-32372 (JP, U) JP-B Sho-51-17304 (JP, B2) SUN-KOKAI 61- 32932 (JP, Y2)

Claims (2)

(57) [Claims] Claim: What is claimed is: 1. A plurality of synthetic fibers, which are cooled and solidified by one cooling chimney, oiled by an oil supply device, and then taken up by a take-up device. The same number of yarn breakage detectors as the number of yarns are provided between the machine and the godeye roll, and the same number of yarn breakers as the number of yarns is provided near the cooling chimney near the oil supply device or the first convergence point. An individual type yarn breakage processing device in which one suction aspirator is provided leeward of the cooling air with respect to the base cooling chimney. 2. A yarn breakage treatment device of a spinning take-up device in which a plurality of synthetic fibers are cooled and solidified by a single cooling chimney, oil is fed by an oil feeding device, and then a take-up device carries out spinning take-up. The same number of yarn breakage detectors as the number of yarns are provided between the machine and the godeye roll, and the same number of yarn breakers as the number of yarns is provided near the cooling chimney near the oil supply device or the first convergence point. An individual type yarn breakage processing device in which one suction aspirator is provided leeward of cooling air with respect to a base cooling chimney, and a single fiber breakage detector is disposed in a position close to the suction aspirator.