JPH06158416A - Spinning device - Google Patents

Abstract

PURPOSE:To obtain a spinning device capable of stably supplying a finishing oil without bumping and freezing of the finishing oil in a spinning device having an atmosphere under reduced pressure in the interior of a spinning cylinder. CONSTITUTION:A spinning device consists of a spinneret part 10, a spinning cylinder 30 connected to the spinneret part, a pressure reducing means 40 linked to the spinning cylinder and a taking-up means 60. The bottom of the spinning cylinder 30 is equipped with a thread handling area of yarn Y which is made of plural yarn guides 17-22 having a narrow passage hole of the yarn Y and has fixed length L, a finishing oil supplying part 50 for providing the thread handling area L with a finishing oil and the finishing oil is supplied to the finishing oil supplying part by a finishing oil supplying means 50A. A pressure adjusting chamber 23 provided with the finishing oil supplying part 50 has degree of vacuum of <=2.6X10<3>Pa to atmosphere pressure and the degree of vacuum is confirmed by a vacuum meter 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention melt-spins a yarn inside a spinning cylinder whose internal pressure is lower than that of the external atmosphere, cools and solidifies the yarn inside the spinning cylinder, and then externally spins it under atmospheric pressure. The present invention relates to improvement of a spinning device for drawing.

[0002]

2. Description of the Related Art In the production of synthetic fibers, as is well known, an oil agent is applied to spun yarns for the purpose of improving their sizing property, smoothness, antistatic property and the like. As this oil agent, usually, an oil component consisting of a sizing agent, a leveling agent, and an antistatic agent is used.
An aqueous emulsion type containing about 1 to 30% by weight is used.

Japanese Patent Publication No. 4-5766 discloses a melt spinning apparatus for so-called vacuum spinning, which can apply such an oil agent to a yarn running in a spinning cylinder whose inside is kept under reduced pressure. The one described in the publication is known. In this spinning device, a spinneret, a spinning cylinder, a godet roller, and a winder are provided in this order, and a vacuum pump for making a reduced pressure atmosphere inside is connected to the spinning cylinder.
A seal guide, which is a narrow slit-shaped yarn passage, is provided in the lower portion thereof. And in this publication,
When the yarn spun from the spinneret is wound around the winder through the inside of the spinning cylinder that has been decompressed by a vacuum pump, the seal guide and the Gode roller, it is proposed that the seal guide supplies oil to the yarn. ing.

On the other hand, Japanese Laid-Open Patent Publication No. 62-15315 also discloses a spinning apparatus in which the inside of the spinning tube is kept in a depressurized state and an oil agent applying device is provided inside the spinning tube immediately before the seal guide. There is.

[0005]

However, in the above-mentioned conventional apparatus, when the degree of vacuum in the spinning cylinder becomes high and the saturation pressure of the oil agent is approached, the air dissolved in the oil agent becomes bubbles and bumps together with the oil agent. For this reason, the oil agent supplied from the oil agent supply hole is ejected so as to be scattered from the oil agent supply hole, resulting in poor adhesion to the yarn. Further, the oil agent discharged from the oil agent supply hole is evaporated and cooled because the inside of the spinning cylinder is in a depressurized state, and is frozen. As a result, the quality of the oil agent component is changed, which may cause yarn breakage. Furthermore, since the evaporated oil agent expands,
This may cause a significant deterioration in the operability of the entire spinning device, such as a marked decrease in the suction capacity of the vacuum pump connected to the spinning cylinder.

Therefore, there is a measure to install an oil agent applying device that causes bumping, freezing, alteration, etc. of the above oil agent outside the spinning tube. However, in this case, when the thread is pulled out from the thread outlet of the bottom of the spinning tube. In addition, there is a drawback in that a high quality yarn cannot be manufactured due to abrasion of the seal guide. Therefore, the refueling guide must be provided inside the spinning tube.

The present invention solves the above-mentioned drawbacks of the conventional device,
An object of the present invention is to provide a spinning device capable of stably applying an oil agent to a yarn passing through the inside of the spinning tube by preventing bumping and freezing of the oil agent inside the spinning tube.

[0008]

In order to solve the above-mentioned problems, a spinning device according to the present invention has a spinneret part for spinning a molten synthetic resin as a yarn from a discharge hole, and a periphery of the spinneret part. And a spinning tube that surrounds the spun yarn and surrounds the spun yarn, a decompression unit that communicates with the spinning tube and causes the decompression atmosphere in the spinning tube, and spun from the spinneret part. In a spinning device comprising: a take-up means for taking a yarn through the inside of the spinning cylinder at a predetermined speed,
(A) A yarn outlet having a fixed length along the running direction of the spun yarn and a narrow yarn path through which the yarn can pass, formed in the lower part of the spinning tube. And (b) an oil agent supply section connected to the oil agent supply means is provided in the middle of the yarn path of the yarn outlet section.

In this case, it is preferable that the oil agent supply section is provided at a position where the degree of vacuum is 2.6 × 10 ³ Pa or more and less than atmospheric pressure. The reason is that the saturation pressure of water at 20 ° C. is 2.6 × 10 ³ Pa, so that water, which is a main component of an aqueous emulsion often used as an oil agent for vacuum spinning, does not cause boiling or freezing. This is because it may be provided at a position under a certain pressure condition.

The contents of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a typical embodiment of a spinning device according to the present invention, and FIG. 2 is a sectional view of the yarn path seal portion 15 shown in FIG. 3 is a longitudinal sectional view of another embodiment of the yarn path seal portion 15, and FIG.
FIG. 4 is a cross-sectional view of the thread guide seal portion shown in FIG. 3, taken along the line BB.

In the figure, 10 is a spinneret portion for spinning a molten polymer extruded from an extruder (not shown) as a yarn Y, in which a spinneret 1 having a large number of discharge holes 2 is integrated with a spinning pack 3. Is fixed on the pack holder 5 in the spin block 4 via a metal seal 6 made of aluminum.

Reference numeral 30 denotes a spinning tube for cooling and solidifying the spun yarn Y, and a barrel portion 30A having therein a spinning chamber S having a long circular cross section extending along the running direction of the yarn Y, and a spinning tube. Three
And a yarn outlet 30B serving as an outlet for the yarn Y. The upper flange 7 of the body portion 30A is fixed to the flange 5a of the pack holder 5 with a bolt 8 via a rubber O-ring 9. Spinning tube 30
From the lower surface of the discharge hole 2 of the spinneret 1 to the spinning chamber S
The length up to the bottom of the nozzle is such that it can surround the lower surface of the discharge hole 2 to at least the solidification point of the spun yarn Y.

On the right side surface of the body portion 30A, a vacuum gauge with a contact 55 for indicating the degree of vacuum of the spinning chamber S and a vacuum pump 12 for making the atmosphere in the spinning chamber S a high vacuum are respectively pipes 55.
a, 12a, the vacuum pump 12 is connected to the controller 1 so that the vacuum gauge 55 maintains a desired degree of vacuum.
It is controlled by 1. That is, with these members, the depressurizing means 40 that creates a depressurized atmosphere inside the spinning tube.
Are configured.

In the yarn outlet 30B, the upper flange 15a of the casing 15 is fixed to the lower flange 5b of the spinning tube 7 with a bolt 13 via a rubber O-ring 14.
In order to prevent outside air from entering the spinning chamber S, the lower portion of the yarn outlet 30B is narrow enough to allow the yarn Y to pass along the traveling direction of the yarn Y, as shown in FIG. Yarn guides 17 to 22 having yarn passage holes 17a to 22a of inner diameter d
Are fixed to the plurality of casings 15 at regular intervals, and pressure regulating chambers 23 to 27 having a predetermined space volume are provided between the yarn guides. In other words, the upper end of the yarn guide 17 to the lower end of the yarn guide 22 forms a yarn path (length L) of the yarn outlet portion 30B, and outside air enters the spinning chamber S at this yarn path. Effectively prevent. In this case, the yarn path length L depends on the internal atmosphere of the spinning chamber S, but is 10 to 100.
It is preferably about 0 mm. The yarn outlet 30B is
In this embodiment, the yarn guides 17 to 22 having six stages and the five pressure adjusting chambers 23 to 27 interposed therebetween are provided, but the present invention is not limited to this mode, and is provided in multiple stages. Then, the labyrinth effect enables spinning under a higher vacuum. However, if the number is too large, the chances of the yarn Y coming into contact with the yarn guide increase, which is not preferable, and the yarn Y
In order to effectively prevent scratching, thread breakage, etc., and to spin a high quality yarn, about 1 to 20 stages, more preferably 3 to 10 stages.
It is better to make a tier. In addition, the yarn Y spun from the spinneret 1
In order to make it easier to hook the yarn onto the take-up means 60, each yarn guide is provided with a slit 19b in the yarn passage hole 19a as shown in FIG. The lid 16 can be opened and closed with the hinge 29a as a fulcrum. The packing 28 is fixed to the joint surface of the thread guide seal lid 16, and when the thread guide seal lid 16 is closed and locked by the tightening tool 29b as shown in the drawing, only the yarn passage holes 18a and 19a are formed. Opening pressure regulation chamber 2
4 are formed. The yarn guide 1
The shapes of 7 to 22 do not have to be limited to those in which a circular thread passage hole and a rectangular slit are connected as in the present embodiment example, and for example, an elliptical shape, a rectangular shape, a square shape,
It goes without saying that any shape can be selected, such as a triangle or only slits. The material of the yarn guide is preferably made of ceramic, for example, in order to minimize damage to the yarn. That is, the yarn outlet portion 30B is designed to be able to open the yarn path seal lid 16 at the time of yarn hooking and simultaneously hook the yarn on all yarn guides.

Reference numeral 50 denotes an oil agent supply section for applying an oil agent to the yarn Y, which is provided in the pressure adjusting chamber 23 at the uppermost stage in the present embodiment, and has an oil supply pump 33, an oil agent tank 34, and a flexible hose 31a. , And is connected to the oil agent supply means 50A including the pipe 33a. In this embodiment, the oil agent supply unit 50 is a nozzle type oil supply guide 31 having an oil agent supply hole 31b inside, and the yarn contacting portion at the tip has a semicircular cross section in the yarn traveling direction. It is fixed by an O-ring 32 mounted inside the inner wall surface of the casing 15 while being in contact with Y. The O-ring 32 also has a role of sealing so as to prevent outside air from entering the pressure adjusting chamber 23. Although the cross-sectional shape of the oil agent supply hole 31b in the direction orthogonal to the central axis is circular in this embodiment, it is rectangular depending on the number of yarns Y of the yarn Y passing through the pressure adjusting chamber 23, the yarn bundle outer diameter, and the like. It can also have a cross-section or other cross-sectional shape. When a plurality of yarns Y are spun in parallel from the spinneret, yarn guides may be provided adjacent to each other by a corresponding number of yarns. A known positive displacement pump such as a gear pump or a diaphragm pump can be used as the oil supply pump 33, but the gear pump is preferable because the gear pump can supply the discharge amount of the oil agent with high accuracy. Although not shown, the oil pump 33 may be electrically connected to the vacuum gauge 35 and may be interlocked so as to be operable only when the inside of the pressure adjusting chamber 23 has a predetermined vacuum degree. Alternatively, the oil tank 34 may be provided with an upper limit switch and a lower limit switch for the oil level, so that the oil tank 34 can be operated in conjunction with the switches.

The refueling guide 31 may be installed at a position where the oil agent does not cause bumping, freezing, or the like in the yarn path L of the yarn outlet 30B. Although it depends on the physical properties such as boiling point and freezing point of the oil, if it is provided at a position where the degree of vacuum is 2.6 × 10 ³ Pa or more and less than the atmospheric pressure, it is possible to avoid bumping and freezing of most of the commonly used oil agents. it can. In this case, if the physical properties of the oil agent are within the range of the above-mentioned pressure conditions, abrasion and yarn breakage caused by contact of a large number of yarn guides with the spun yarn running in the yarn path without lubrication In order to avoid such problems, it is preferable that the refueling guide is installed at a position as close to the spinning chamber S as possible as shown in FIG. With respect to the position of the lubrication guide provided with such conditions, the differential pressure between the degree of vacuum inside the spinning chamber S and the atmospheric pressure, which is required from the spinning conditions, and the yarn path length L are known in advance. The position can be easily known by obtaining the pressure gradient between the yarn paths L. Further, for example, as shown in FIG. 1, the casing 15 is provided with the refueling guide mounting holes 51 and the vacuum gauge mounting holes 52 in the number corresponding to each pressure adjusting chamber.
And the thread guide seal lid 16 are respectively provided, the depressurizing means 40 is actually operated, and the refueling guide 31 and the vacuum gauge 35 are replaced with the respective mounting holes 51 and 52 to search for the position of the oil agent supply section that meets the above conditions. However, after the mounting position is determined, the remaining mounting holes may be sealed with the blind plugs 53 and 54, respectively. Note that the number of refueling guides installed is not limited to one as in the present embodiment, and a plurality of refueling guides may be provided in the running direction of the yarn within the above pressure conditions to provide a more uniform and reliable application of the oil agent. May be performed.

FIGS. 3 and 4 show an example of an embodiment in which the yarn outlet portion 30B and the oil agent supply portion 50 of FIGS. 1 and 2 are different from each other. FIG. 3 is a longitudinal sectional view thereof, and FIG. BB of 3
FIG.

As shown in the figure, in the yarn outlet section 30B of this embodiment, a cylindrical member 42 is formed at the bottom of the spinning tube 30 of FIG. 1, and a cylindrical plug is formed below the cylindrical member 42. Four
3 mounting holes 42a are formed, and at a distance E from the bottom of the spinning chamber S, a pressure detecting hole 42b opening to the mounting hole 42a is formed.
Is equipped with a vacuum gauge 4
7 is fixed by a pipe 47a. The cylindrical plug 43 includes a plug portion 43a having a circular cross section that is fitted to the cylindrical member 42,
It is composed of a flange 43b fixed to the bottom of the cylindrical member by a bolt 45. The plug portion 43a is processed so that the outer diameter of the plug portion 43a is equal to the inner diameter of the mounting hole 42a of the cylindrical member, and the left side surface has a rectangular cross section or a square shape as shown so that the yarn Y can pass therethrough. A slit 44, which is a yarn path of the yarn Y having a narrow cross-sectional shape such as a triangle or an ellipse, is formed along the traveling direction of the yarn Y. In addition, the slit 4 facing the pressure detection hole 42b.
An oil supply passage 46 communicates with the position 4 and the other end is connected to the oil supply pump 33 and the oil supply tank 34. The distance E is set to 2.6 × 10 ³ Pa when the pointer of the vacuum gauge 47 is set as a preferable position of the oil agent supply unit as described above.
It is a position above the atmospheric pressure and is obtained by calculation from the differential pressure between the degree of vacuum inside the spinning chamber S and the atmospheric pressure, and the yarn path length.

According to such an embodiment, as in the apparatus of the embodiment shown in FIGS. 1 and 2, the yarn Y running from the oil tank 34 through the oil supply pump 33 through the oil supply passage 46 in the slit 44 is formed. In addition to being able to apply an oil agent without causing bumping or freezing, the slit 44 can prevent the outside air from entering the spinning chamber S, and, compared with the device of the embodiment example of FIG. 1 and FIG. There is an advantage that the structure of the line exit portion 30B becomes very simple. Moreover, the cylindrical plug 43 can be easily inserted into and removed from the mounting hole 42a of the cylindrical member 42. Therefore, if a plurality of slits 44 having different cross-sectional areas are prepared, the spun diameter of the yarn Y and the spinning It is possible to quickly respond to changes in the outer diameter of the yarn bundle due to changes in the number of yarns.

Returning to FIG. 1 again, 60 below the yarn outlet 30B is a take-out means for pulling the yarn Y out of the yarn outlet 30B, and a pair of them are forcibly rotated by appropriate driving means. The take-up tension of the yarn Y is detected by the tension detector 38 provided in the yarn path between the cordee rollers 37 and the winder 41, and the controller 39 takes up the take-up package. It is configured so that the tension is constant.

Next, the operation of the apparatus of the above embodiment will be described.

First, in order to thread the yarn Y spun from the spinneret 1 onto the winder 41, the yarn seal lid 16 at the lower end of the spinning tube 30 is opened, and the yarn Y drawn out from the spinneret 1 is not shown. Each slit 17 while collecting with a suction gun
The yarn passage holes 17 of the yarn guides 17 to 22 from b to 22b
a to 22a and close the thread guide seal lid 16.
When the threading work is completed, operate the vacuum pump 12,
The desired reduced pressure atmosphere inside the spinning chamber S that has been input to the controller 11 in advance is reached. When the spinning chamber reaches a predetermined vacuum degree, the vacuum degree in the pressure adjusting chamber 23 is confirmed with a vacuum gauge 35. If the scale of the vacuum gauge indicates 2.6 × 10 ³ Pa or more and less than atmospheric pressure, lubrication is performed. The pump 33 is operated to apply the oil agent from the oil supply guide 31 to the spun yarn Y. The yarn Y to which the oil agent is applied passes through the yarn guides 17 to 22, passes through the Godie rolls 36 and 37, and is wound around the winder 41 with a predetermined take-up tension. In this case, in the pressure regulation chamber 23,
Since the oil agent has a degree of vacuum that does not cause bumping or freezing, stable application of the oil agent is performed inside the pressure adjusting chamber, and subsequent rubbing by the yarn guides 18 to 22 is prevented. Further, at the yarn outlet 30B at the lower part of the spinning tube, the inner diameter d of the yarn passage holes 17a to 22a of each yarn guide is set to a narrow inner diameter through which the yarn Y passes, so that the spinning chamber S is externally supplied. Effectively prevent outside air from entering inside.

[0024]

[Embodiment] In the apparatus shown in FIG.
The inner diameter d of the thread passage hole of 1.0 is set to 1.0 mm, and the vacuum pump 1
As two, using two oil-rotation type pumping speeds of 1200 L / min, the degree of vacuum inside the spinning chamber S is set to 900 Pa,
Check the degree of vacuum in the pressure regulation chamber 23 with a vacuum gauge 35 to obtain 4.4 ×
It was maintained at 10 ⁴ Pa. Then, the polyester yarn Y is spun from the spinneret 1, and the take-up speeds of the Gode rolls 36 and 37 and the winder 41 are both set to 3000 m / min, and 5
A yarn Y of 0 denier 24 filaments was wound as a winding package.

As the oil agent, an aqueous emulsion type woven / knitting oil agent having the following composition and concentration was used.

[Concentration] 10% [Composition] Octyl stearate 50% Mineral oil 10% POE (n) Olate 15% POE (n) Hardened castor oil ether 20% Alkyl sulfonate Na 5% In the yarn exit 30B of the spinning machine. As a result, a stable oil agent can be applied without causing ejection failure or freezing, and the yarn Y drawn from the yarn outlet 30B by the take-up means 60 is of high quality with no scratches or yarn breakage.

[0027]

Comparative Example On the other hand, when the discharge amount of the vacuum pump 12 was gradually increased by a command from the controller 11 and the yarn Y taken by the take-up means 60 was examined, the yarn Y was found.
Bubbles are attached to the inside of the pressure regulation chamber 23, and the degree of vacuum inside the pressure regulation chamber 23 at this time is confirmed with a vacuum gauge 35.
It was found that air bubbles were generated from the oil agent when the pressure reached 0 ³ Pa.

Further, the vacuum pump 12 was controlled to gradually increase the degree of vacuum inside the pressure adjusting chamber 23. As the degree of vacuum became higher, the taken-up yarn Y contained a frozen oil solution. It was found to adhere. Along with this phenomenon, the spun yarn was cut into single yarns at the yarn outlet portion 30B, and stable spinning could not be performed.

[0029]

EFFECT OF THE INVENTION The spinning device according to the present invention has the above-described structure, and in particular, a narrow yarn path having a fixed length along the traveling direction of the spun yarn at the lower part of the spinning tube and through which the yarn can pass. In addition to providing the yarn outlet part in which the yarn is formed, the oil agent supplying part connected to the oil agent supplying means is provided in the middle of the yarn path of the yarn outlet part, so that the inside of the spinning cylinder is maintained in a high vacuum atmosphere. In this state, bumping, freezing, etc. of the oil agent inside the spinning tube can be prevented, and stable application of the oil agent can be performed.

As a result, a high quality yarn free from scratches and yarn breakage can be spun with high production efficiency.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a typical embodiment of a spinning device according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of the yarn path seal portion shown in FIG.

FIG. 3 is a vertical cross-sectional view of an embodiment example different from the yarn outlet portion and the oil agent supply portion shown in FIGS. 1 and 2.

FIG. 4 is a sectional view of the thread guide seal portion shown in FIG. 3, taken along the line BB.

[Explanation of symbols]

 1 …… Spinner 2 …… Discharge hole 3 …… Spinning pack 4 …… Spin block 5 …… Pack holder 10 …… Spiper section 11, 39 …… Controller 12 …… Vacuum pump 15 …… Casing 16 …… Yarn path seal Lid 17 to 22 ...... Thread guide 23 to 27 ...... Pressure adjusting chamber 30 ...... Spinning cylinder 30A ...... Body 30B ...... Thread exit 31 ...... Oil supply guide 33 ...... Oil supply pump 34 ...... Oil tank 35 , 55 ...... Vacuum gauge 36, 37 ...... Godie roll 38 ...... Tension detector 40 ...... Decompression means 42 ...... Cylindrical member 43 ...... Cylindrical plug 44 ...... Slit 46 ...... Oil supply passage 50 ...... Lubricant supply part 60 ...... Collecting means d …… Polar diameter L …… Yarn path length S …… Spinning chamber Y …… Yarn

Claims (2)

[Claims] 1. A spinneret portion for spinning a molten synthetic resin as a yarn from a discharge hole; a spinning cylinder surrounding the spinneret portion and surrounding the spun yarn yarn; A decompressing unit that communicates with the spinning cylinder to bring the interior of the spinning cylinder into a decompressed atmosphere, and a take-up unit that draws the yarn spun from the spinneret at a predetermined speed through the spinning cylinder. In the spinning device, (a) a narrow yarn path is formed in the lower part of the spinning tube, the yarn path having a constant length along the traveling direction of the spun yarn and allowing the yarn to pass through. And (b) an oil agent supply section connected to an oil agent supply means is provided in the middle of the yarn path of the yarn exit section. 2. The spinning device according to claim 1, wherein the installation position of the oil agent supply unit is a position where the degree of vacuum is 2.6 × 10 ³ Pa or more and less than atmospheric pressure.