JP3418947B2 - Method and apparatus for treating cut yarn in melt spinning cylinder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a yarn in a melt-spinning barrel of a thermoplastic polymer, and more specifically, when a melt-spun yarn is cut, it is continuously spun. The present invention relates to a method for treating a cut yarn and an apparatus for the same, which enables smooth treatment of the yarn and does not require skill to restart winding of the yarn.

[0002]

2. Description of the Related Art Generally, in a spinning cylinder for melt spinning a thermoplastic polymer such as polyester, polyamide, polyolefin, polyvinyl, etc., a cooling air flow region such as air or an inert gas is formed below the spinneret. The polymer discharged from the spinneret is cooled and solidified to form a yarn. However, when using such a melt spinning tube, uniform solidification cannot be achieved and a uniform yarn cannot be obtained unless the cooling airflow acts uniformly on the spinning yarn.

On the other hand, recently, the increase in spinning tension due to air resistance has become a major obstacle with the increase in spinning speed. As a countermeasure against this, Japanese Utility Model Publication 1-26775 and Japanese Utility Model Publication No. 58-113779. As described in the publication, etc., the yarns are bundled by metering oil at a position closer to the spinneret surface than before,
It has been attempted to suppress an increase in spinning tension due to an increase in air resistance due to an increase in speed, and for this reason, it is often used to install an oil supplement mechanism in the melt spinning cylinder.

[0004]

However, in the spinning using the melt spinning tube, when the number of holes in the spinneret is relatively large and the spinning is fine denier, the cooling air flow acts uniformly. It is difficult to do so, and the spinning yarn is shaken by the vibration of the semi-solidified portion of the dissolved polymer (usually referred to as resonance) to make the spinning yarn unstable, and sometimes the yarn is cut. In such a case, in the melt-spinning cylinder with a built-in oil replenishment mechanism, the continuously spun yarn is entangled with the oil replenishment mechanism, which significantly impairs the post-processing work and restores a predetermined number of divided fibers. Doing this is a fairly difficult task.

The present invention was invented for the purpose of solving the above problems, and even in a melt spinning cylinder having a built-in oil replenishing mechanism, post-processing can be easily and accurately carried out when the spun yarn is cut. The present invention aims to provide a processing method and apparatus capable of reducing the labor of workers and improve the processing speed.

[0006]

In order to solve the above problems, the present invention comprises the following means. That is, claim 1
The invention described in (1) is a method for solving the above-mentioned problems, in which a spinneret, a nozzle of an oiling mechanism, a thread guide of an oiling mechanism, and a thermoplastic winding mechanism in which a yarn winding mechanism is sequentially provided from the upper part to the lower part in the cylinder. In the combined melt spinning tube, when the spinning yarn is cut, both the shutter on the rear wall side and the front shutter on the front wall side that cover the upper part of the oiling mechanism are extended, and the yarn between the spinneret and the nozzle is extended. The first step of completely blocking the running path almost horizontally, and rotating the front shutter from the operating position to the avoidance position, maintaining the rear shutter in the horizontal operating position, and continuously flowing down the spun yarn in front of it. In the second step, the fiber separating guide provided on the rear shutter is advanced toward the front wall, and the continuously spun yarn is divided into a predetermined number and inserted into a predetermined number of guide grooves provided at the tip thereof. Third process and front wall Rotate the upright yarn putting plate at a sideward retracted position to an operating position in a substantially horizontal direction, move its tip between the nozzle of the oiling mechanism and the yarn guide, and bring it into contact with a continuously flowing spun yarn. The fourth which moves horizontally and divides into a predetermined number and inserts into the thread guide
After performing the process, moving the yarn insertion plate to the avoiding position, retracting the fiber separating guide, and moving the rear shutter to the avoiding position, the spinning yarn that continuously flows down is spun into the spinneret, the nozzle of the oiling mechanism, and the oiling mechanism. The method of processing a cut yarn is characterized in that the fifth step of sequentially passing through the yarn guide of the above, and the above five steps are sequentially performed.

The invention according to claim 2 is an invention of an apparatus for carrying out the processing method, which is rotatably supported by an A support shaft near a front wall of the melt spinning tube and has a lower end hanging down. The front shutter that can be moved between two positions, the avoidance position in the state and the actuation position in the horizontal state, and the pivotal support on the B support shaft near the rear wall so that the upper end is upright and the actuation in the horizontal state. The rear shutter, which is movable in two positions, and the avoidance position, which is rotatably supported by the C support shaft that moves up and down along the front wall, and whose surface is in an upright state, and then horizontally rotates. It consists of three parts, a thread-placing plate that can be moved into two positions, an operating position that allows the tip to advance between the nozzle of the oiling mechanism and the thread guide.
To fully close the spun yarn path by the front and rear shutters, half-close the spun yarn path by the rear shutter, and fully open the spun yarn path by avoiding the front and rear shutters and the yarn insertion plate. It is characterized by being configured.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an explanatory view showing an example of an apparatus for carrying out the method of the present invention, and FIGS. 2 to 6 are explanatory views showing operating states of respective constituent members in respective steps of the method of the present invention. The apparatus shown in FIG. 1 shows the main part of the apparatus of the present invention provided below the spinneret in a conventionally known melt spinning tube. First, the structure of the apparatus will be described.

As shown in FIG. 1, an apparatus for carrying out the method of the present invention comprises a front shutter 4 rotatably mounted on an A support shaft 3 provided in the vicinity of a front wall 2 of a melt spinning tube 1, and the same tube 1. Back wall 5
A rear shutter 7 rotatably mounted on a B support shaft 6 provided in the vicinity, and a C support shaft 8 which moves up and down along a vertical axis or a vertical groove (neither is shown) provided on the front wall 2. It is composed of three members of a thread putting plate 9 which is mounted as possible.

The front shutter 4 is made of a flat plate having a predetermined area, and its base 10 is rotatably mounted on the A support shaft 3 and has its lower end suspended by a driving force of an air cylinder (not shown) or the like. It is possible to move to two states, an avoidance position that is in a state and an operating position that is in a horizontal state.

Similarly, the rear shutter 7 is also made of a flat plate having a predetermined area, and its base 11 is rotatably mounted on the B support shaft 6 and its upper end is driven by a driving force of an air cylinder (not shown) or the like. Can be moved to two states, an avoidance position where the is upright and an operating position where the is horizontal.

However, when the front shutter 4 and the rear shutter 7 move from their respective avoiding positions to their operating positions and extend horizontally, the tip portions 12 and 13 thereof are uneven so that they can be integrally connected. It is formed in a shape that can be fitted.

A fiber separating guide 15 that reciprocates toward the front wall 2 is installed below the rear shutter 7 that covers the upper part of the oiling mechanism 14 when it moves to the operating position. At the tip, which is the working surface of the fiber splitting guide 15, there are a number of guide grooves corresponding to the number of spinning fibers of the melt spun yarn, that is, in the shape shown in FIG.
Four 6 are formed.

Next, the structure of the thread insertion plate 9 which is the core of the present invention will be described. As described above, the thread insertion plate 9 is rotatably supported by the C support shaft 8 that moves up and down along the front wall 2, and the surface 17 thereof is in the upright position (a solid line). Then, the surface 17 is rotated rightward in the horizontal direction as shown in FIG. 1 from that position, and the tip end 18 thereof is moved to two positions of an operating position (shown by a dotted line) for advancing between the nozzle 19 of the oiling mechanism and the yarn guide 20. It has a structure that allows it.

The thread putting plate 9 is moved to the operating position by manually moving the lifting handle 21 from the lower position to the upper position. That is, as the C support shaft 8 rises, the surface 17 is swiveled to the right and fixed to the center of the back side of the surface 17 of the A lever 2.
2, the thread insertion plate 9 is avoided by the interlocking action of the B lever 24 connected to the A lever 22 via the D support shaft 23 and the fixed shaft 25 rotatably supporting the base portion of the B lever 24. It is possible to move from the position to the operating position shown by the dotted line.

The method of the present invention is carried out by using the apparatus having the above-mentioned structure. Next, the process will be specifically described. During the normal operation during continuous spinning shown in FIG. 2, all of the front shutter 4, the rear shutter 7, and the yarn insertion plate 9 are in the avoidance position described above. That is, the front shutter 4 is in the hanging state, the rear shutter 7 is in the upright state, and the surface 17 of the thread insertion plate 9 is in the vertical state. The spun yarn Y continuously discharged from the uppermost spinneret (not shown) of the melt-spinning barrel 1 comes into contact with the nozzle 19 of the oiling mechanism via the space area in the barrel, and then passes through the yarn guide 20 to move downward. Is continuously wound around the yarn winding mechanism (not shown). When the spun yarn Y is cut during such normal operation, the following yarn treatment is carried out.

First step: Simultaneously with the yarn cutting, both the front shutter 4 and the rear shutter 7 are rotated from the avoiding position to the operating position via a drive mechanism (not shown) such as an air cylinder, As described above, the yarn running path between the spinneret and the nozzle 19 of the oiling mechanism is blocked substantially horizontally. In such a state, the continuously discharged spun yarn Y does not fall to the lower part of the spinning tube and is accumulated on the front and rear shutters 4 and 7.

Second step: removing the accumulated yarn,
The front shutter 4 is moved from the operating position to the avoidance position to bring each member into the state shown in FIG. That is, the front shutter 4 is in the avoiding position, the rear shutter 7 is in the operating position in which the fiber separating guide 15 is retracted and is in a horizontal state, and the yarn inserting plate 9 is in the avoiding position. Thereafter, the spun yarn Y is continuously dropped into the space in front of the rear shutter 7.

Third step ... Then, manually by the worker,
As shown in FIG. 5, the fiber-splitting guide 15 provided at the lower portion of the rear shutter 7 is advanced toward the front wall 2 side, and a predetermined number of guide grooves 16 provided at the tip of the fiber-splitting yarn Y are continuously fed down. Divide into the number of fibers and insert. The spun yarn Y after insertion passes through the route shown in FIG.

Fourth step ... Next, as shown in FIG. 6, the surface 17 of the thread putting plate 9 in the retracted position is rotated clockwise as the handle 21 is raised, and the B lever about the fixed shaft 25 is rotated. In cooperation with the rocking of 24, the spun yarn Y is pressed toward the oiling mechanism 14 side by the tip 18. The guide groove 1 of the fiber separating guide 15 is previously formed on the tip 18 of the thread insertion plate 9.
A groove for thread guide 26 shown in FIG. 7 corresponding to the number of six is formed, and when the thread inserting plate 9 is rotated to press the spun yarn Y horizontally and from top to bottom, a predetermined amount The spun yarns Y having the same number of fibers are guided and inserted into the yarn guides 20 which are fish tail guides.

Fifth step ... Then, the thread insertion plate 9 is returned to its original position, the C support shaft 8 is lowered to move these mechanisms to the avoidance position, and the fiber separating guide 1 provided below the rear shutter 7.
5 and the rear shutter 7 is rotated to the avoidance position as a whole to return to the configuration shown in FIG. 2, and one cycle of the processing method is completed. After the processing of the cut yarn is completed, the winding by the yarn winding mechanism is restarted, and the spun yarn Y is continuously discharged.
As shown in FIG. 2, the yarn sequentially passes through a spinneret (not shown), a nozzle 19 of the oiling mechanism, and a yarn guide 20 of the oiling mechanism.

The method for treating a cut yarn according to the present invention is carried out as in the above process. In the first process, the yarn running path is entirely closed, so that even if a temporary processing delay occurs, a problem due to the discharged yarn occurs. In the second to fourth steps, the yarn running path is semi-closed, especially while the upper surface of the oiling mechanism is completely protected, the spun yarn is separated and the yarn is introduced into the oiling mechanism. Since it is carried out, harshness due to the discharged yarn can be eliminated and the yarn can be accurately guided to the yarn guide.

[0023]

As described above, according to the method and apparatus of the present invention, even in a melt spinning tube having an oiling mechanism inside, the shutter device is fully closed, half-opened, and fully opened, and the three-step operation is performed. It is possible to easily insert the spun yarn into the yarn guide and abut the replenishing means to the yarn guide due to the interaction of the yarn inserting plate operations performed in the half-opened state. Can be completely bred.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an entire apparatus for carrying out the method of the present invention.

FIG. 2 is an explanatory diagram showing the movement of each mechanism during normal operation.

FIG. 3 is an explanatory diagram showing the movement of each mechanism in the first process.

FIG. 4 is an explanatory view showing the movement of each mechanism in the second process.

FIG. 5 is an explanatory view showing the movement of each mechanism in the third process.

FIG. 6 is an explanatory view showing the movement of each mechanism in the fourth and fifth steps.

FIG. 7 is a perspective view showing a thread insertion plate.

FIG. 8 is a perspective view showing a fiber separation guide.

[Explanation of symbols]

1 Melt spinning tube 2 front wall 4 front shutter 5 rear wall 7 Rear shutter 9 thread insertion board 14 Oiling mechanism 19 nozzles 20 Thread guide

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-55-22065 (JP, A) JP-A-55-71807 (JP, A) JP-A-52-140617 (JP, A) JP-A 51- 105412 (JP, A) Actual development Sho 52-120715 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) D01D 1/00-13/02

Claims (2)

(57) [Claims] 1. A spinneret from the upper part of the cylinder to the lower part,
Nozzle of oiling mechanism, thread guide of oiling mechanism,
In a thermoplastic polymer melt spinning tube in which a yarn winding mechanism is sequentially provided, when the spinning yarn is cut, both the rear shutter on the rear wall and the front shutter on the front wall covering the upper part of the oiling mechanism are closed. The first step of extending and closing the yarn running path between the spinneret and the nozzle substantially horizontally, and rotating the front shutter from the operating position to the avoiding position and setting the rear shutter to the horizontal operating position. The second process of continuously maintaining and spun down the spun yarn in front of it, and advancing the fiber separation guide provided in the rear shutter toward the front wall, and continuously flowing down into a predetermined number of guide grooves provided at its tip. The third step of dividing the spun yarn into a predetermined number and inserting it, and rotating the upright yarn putting plate at a retracted position near the front wall to a substantially horizontal operating position, the tip of which is the nozzle of the oiling mechanism. And move it between the thread guides 4th step of contacting the spun yarn continuously flowing down into the yarn guide, moving it horizontally and inserting it into the yarn guide by dividing it into a predetermined number, and moving the yarn inserting plate to the avoiding position, After retreating and moving the rear shutter to the avoidance position, the spinning yarn that continuously flows down is spun into the spinneret,
A method for treating a cut yarn in a melt spinning tube, which comprises sequentially performing a fifth step of sequentially passing through a nozzle of an oiling mechanism and a yarn guide of the oiling mechanism, and the above five steps. 2. The spinneret from the upper part of the cylinder to the lower part,
A processing device for a cutting yarn provided in a melt spinning cylinder 1 in which a nozzle 19 of an oiling mechanism, a yarn guide 20 of the oiling mechanism, and a yarn winding mechanism are sequentially arranged, and an A spindle 3 near a front wall.
A front shutter 4 which is rotatably pivotally supported on the lower end and is movable in two positions, namely, an avoiding position in which the lower end is in a hanging state and an operating position in a horizontal state.
And a rear shutter 7 that is rotatably supported by a B support shaft 6 near the rear wall, and has an upper end that can be moved between two positions, an avoiding position in an upright state and an operating position in a horizontal state, and a vertical shutter along the front wall. Moving C
There are two states, an avoiding position in which the surface is rotatably supported by the support shaft 8 and the surface is in an upright state, and an operating position in which the surface is horizontally avoided and its tip is advanced between the nozzle 19 and the thread guide 20 of the oiling mechanism. The movable yarn insertion plate 9 is composed of three members. The front shutter 4 and the rear shutter 7 fully close the spun yarn path, the rear shutter 7 partially closes the spun yarn path, and the front and rear shutters 4, 7. And a device for treating cut yarns in a melt spinning tube, which is configured so that the spinning yarn path can be fully opened by avoiding the yarn insertion plate 9.