JP3376319B2 - Apparatus for spinning polymer fibers and method for spinning the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polymer fiber having a very poor spinnability from a spinneret or a problem in spinnability when performing special spinning or spinning ultrafine yarn. The present invention relates to a spinning device and a spinning method for the same fiber, which can be suitably applied to spinning, and can correct a spinning spindle that has a discharge failure during spinning, ensure spinnability, and stably and industrially. The present invention relates to a polymer fiber spinning apparatus capable of producing polymer fibers and a spinning method thereof.

[0002]

2. Description of the Related Art Generally, in producing polymer fibers,
A plurality of polymer fibers are spun at one time by a spinning device equipped with a plurality of spinning spindles to be industrially produced. At this time, a metering pump is separately connected to each spinning spindle, and a fixed amount of molten polymer or spinning dope is supplied to each spinning spindle. Further, the molten polymer or spinning stock solution spun from each spinning spindle is passed through a gas or solution to be solidified, or the solvent of the spinning stock solution is removed and dried, and then the obtained polymer fiber is wound into a roll. It is wound up by.

In the production process of this polymer fiber, in order to make the quality of each polymer fiber spun from a plurality of spinning spindles constant, the spun amount of the molten polymer or spinning dope from each spinning spindle is the same. Need to The amount of spinning from the spinning spindle is controlled by a metering pump. Therefore, by connecting a plurality of metering pumps connected to each spinning spindle to a common drive shaft, the plurality of metering pumps can be driven by the same rotation, and the same amount of molten polymer or The spinning solution is supplied.

Further, in order to stably produce polymer fibers, it is extremely important to secure the initial spinnability of the molten polymer or the spinning dope from the spinneret. That is, the discharge amount and the discharge direction per unit time from the discharge holes formed in the same spinneret are made constant, and moreover, the discharge amount among a large number of discharge holes in one spinneret is kept more uniform. As a result, spinning stability and yarn quality are ensured.

By the way, there is a need for polymer fibers in recent years.
Are highly diversified and high-grade, and in order to market polymer fiber materials that meet the needs of consumers and are accepted by consumers, it is not possible to deal only with the characteristics of fibers derived from polymer matrix. Is the current situation. for that reason,
In addition to the texture and function derived from the polymer matrix, it is essential to add new and differentiated textures and special functions to polymer fibers by various methods. Many new materials are on the market.

However, in producing such a new material, many materials which have been difficult to cope with with the conventional spinning apparatus have been developed. For example, in the case of multi-thread, which is a typical fiber material having a differentiated texture, in general, the number of discharge holes formed in one spinneret is increased and It is essential to reduce the diameter of the discharge holes. Due to such porosity and small pore size, the spinning stock solution is misaligned in the discharge direction from each discharge hole, or a uniform discharge amount is not discharged from all the discharge holes, and the spinning stock solution is not discharged. Poor spinability, such as the presence of holes, occurs.

Regarding the spinnability, basically, the viscosity, the concentration, the quality of the spinning dope and the specifications of the spinneret (particularly the diameter of the discharge hole and the shape from the inlet side to the outlet side of the spinning dope in the discharge hole), etc. It is known that it is extremely effective to set a high discharge condition, that is, to discharge the spinning dope at a high speed. Therefore, when spinning polymer fibers having a problem of spinnability, spinning under this high discharge condition is generally adopted.

However, when a multi-thread is spun under a high discharge condition by using the above-described porous spinneret having a small pore size, the yarn quality such as elongation and strength of the polymer fiber is also an extreme value. In some cases, the obtained polymer fiber has a problem in practical use, such as poor passability in the post-process. Therefore, in the case of multi-thread, there is a strong tendency to decrease the spinning speed from the viewpoint of securing the yarn quality, but this slowing of the spinning speed secures the yarn quality, while promoting the deterioration of the spinnability. In addition, there is a problem that productivity is lowered.

Therefore, in producing multi-threaded yarns, it is common to increase the spinning spindles in order to compensate for the decrease in productivity that accompanies the reduction in spinning speed. In order to increase the spinning time and spinning time, and to maintain the spinning property, measures such as increasing the frequency of washing the spinneret are taken. Therefore, the equipment cost increases by increasing the spinning spindle and the spinneret, the labor cost increases by extending the spinning work time, and the spinneret cleaning frequency increases from the equipment of the spinneret. The number of removing and assembling operations increases, and the time and cost loss in the manufacturing process also increases. Therefore, the above-mentioned measures are, as a result, a major factor that significantly increases the manufacturing cost.

Therefore, in the conventional spinning device, the spinning speed of the drive shaft of the metering pump is set higher than the specified spinning speed at the time of production at which spinning can be performed at the initial stage of spinning, and spinning is performed to improve spinnability. A method has been adopted in which, after stabilizing, the rotation speed is reduced to the specified rotation speed, the speed is set again, and spinning is performed. However, when troubles such as defective discharge or quality abnormality of the spinning dope from the spinneret after switching to production conditions occur, the spinning spindle with the defective discharge is corrected, or the spinneret is individually replaced. When performing the procedure, it is a condition under which the treatment is difficult to perform, that is, the correction or spinning work is performed in a state in which the drive shaft of the metering pump is rotated at a specified rotation speed.
The work is complicated and time-consuming, and there is a concern that the yield and the yarn quality may deteriorate.

Therefore, a plurality of metering pumps are connected to one common drive shaft to drive the plurality of pumps simultaneously and at the same time, and further, the spinning spindle correction and the spinneret replacement operation are individually performed at the time of production. Spinning apparatuses that can be used are disclosed, for example, in Japanese Utility Model Publication No. 54-2250 and Japanese Patent Publication No. 59-47407.

In the driving device for a metering pump in the spinning device disclosed in Japanese Utility Model Publication No. 54-2250, each of the plurality of metering pumps has a drive shaft, and the plurality of drive shafts have a common main shaft. The rotational force is transmitted from the drive shaft, and the drive shaft is rotationally driven. Further, apart from the main shaft, a chain wheel that is rotationally driven at a lower speed than the main shaft by another driving means is arranged on each drive shaft. Sliding between the chain wheel and the main shaft, and selectively located at any one of the connecting position with the main shaft, the connecting position with the chain wheel, or the non-connecting position between the two. A gear that transmits the drive to the drive shaft is arranged.

In a spinning apparatus equipped with such a gear and a chain wheel, for example, when a defect occurs in one spinning spindle, the connection between the spinning spindle and the drive shaft of the metering pump and the main spindle is disconnected by the spinning spindle. It is possible to correct or replace the spinning spindle by stopping the supply of the spinning dope to the spindle. At this time, the spinning stock solution remaining in the metering pump may have its temperature lowered and its viscosity increased. Therefore, when starting the supply of the spinning dope again, if the drive shaft of the metering pump is connected to the main shaft and suddenly rotated at high speed, the viscous resistance of the remaining spinning dope is high, which may damage the metering pump. There is. Therefore, first, the chain wheel that is rotating at a low speed and the drive shaft are connected by a gear to prevent damage to the metering pump due to excessive torque.

Further, the spinning device disclosed in Japanese Patent Laid-Open No. 59-47407 employs a pendulum type metering pump having a pump gear that can move on a pendulum type trajectory around a fulcrum. The pump gear is connected to any one of a drive gear provided on one drive shaft that is a main drive source and a drive gear provided on the other drive shaft that is rotating at a low speed,
The drive is transmitted to the metering pump.

Even in the same spinning device, when discharge failure occurs in any of the spinning spindles, the gear of the metering pump to the spinning spindle having the failure is connected to the other drive gear which is driven at a low speed. However, the treatment can be performed after reducing the supply amount of the spinning dope. It should be noted that the apparatus has an effect of preventing deterioration and coagulation of the stock solution in the process by continuing to supply the stock solution for spinning during treatment of the defective spinning spindle.

[0016]

However, in all of the spinning devices disclosed in the above publications, the main drive shaft that rotates at a specified rotation speed during production and the rotation speed that is lower than that of the main drive shaft. It is driven by at least two power sources that are separate from the other drive means. Therefore, when driving the low-speed rotation driving means, inevitably a large amount of power energy is required for the other driving means, and the cost therefor also increases. Further, in any of the publications, the rotation speed is lower than the specified rotation speed, and therefore, when spinning the ultrafine fibers corresponding to the above-mentioned mulching, sufficient spinnability at the initial stage of spinning cannot be ensured. There is also a problem.

The present invention has been made to solve the above-mentioned conventional problems, and it is possible to easily correct only a spinning spindle which has failed in spinning during spinning of a polymer fiber, and to make it porous and small in diameter. Even when using the prepared spinneret, it is possible to maintain the spinnability at each spinneret and to spin from a large number of discharge holes in a predetermined direction and at a uniform discharge rate, making polymer fibers industrial. It is an object of the present invention to provide a spinning device for polymer fibers that can be stably produced at low cost and a spinning method thereof.

[0018]

In order to achieve the above object, the invention according to claim 1 of the present invention comprises a plurality of spinning spindles and a plurality of spinning spindles connected to each spinning spindle for supplying a spinning dope to the spinning spindles. A metering pump, a single main drive shaft that commonly drives a plurality of the metering pumps at a specified rotation speed during production, and a single auxiliary drive that drives the metering pumps at a rotation speed different from the specified rotation speed. And a shaft, wherein the metering pump is a spinning device for polymer fibers, comprising a connection switching unit selectively connected to the drive of either the main drive shaft or the auxiliary drive shaft,
The main drive shaft and the auxiliary drive shaft by a single power source,
Each is driven and rotated at the required number of revolutions, and
The auxiliary drive shaft is connected via a relay drive shaft by a connecting mechanism.
A clutch mechanism connected to and arranged at the end of the relay drive shaft
The relay drive shaft and the auxiliary drive shaft can be contacted and separated via
The main constitution is a spinning machine for polymer fibers, which is characterized by

In the spinning device, the main drive shaft and the sub drive shaft having different rotational speeds can be driven and rotated by a single power source, so that the power energy can be reduced as compared with the case where they are driven by separate power sources. be able to. Further, the metering pump is selectively connected to the drive of either the main drive shaft or the sub drive shaft having different rotational speeds by a connection switching unit. Therefore, for example, when the auxiliary drive shaft is rotated at a higher speed than the main drive shaft, if a problem such as discharge failure occurs in any of the spinning spindles during production, the auxiliary drive that rotates the metering pump at a high speed. After the shaft is switched to improve the spinnability, the drive of the main drive shaft is switched again, so that the ejection failure can be easily corrected.
Alternatively, even after performing individual spinneret replacements on any of the spinning spindles, the spinning spindle can be driven at high speed to perform spinning under high discharge conditions at the initial spinning stage when the metering pump of the spinning spindle is started up. A more uniform spinnability from a large number of discharge holes can be secured, and polymer fibers can be stably and industrially spun out.

Further, the main drive shaft and the sub drive shaft are
It is possible to connect and disconnect via a latch mechanism, so unnecessary
In this case, the rotation of the auxiliary drive shaft can be stopped,
It is possible to further reduce the force energy.

The invention according to claim 2 of the present application
The drive shaft and the auxiliary drive shaft are connected to each other via a speed change device.
There is. As the speed change means, for example, the main drive shaft and the front
The sprocket and chain used to connect with the auxiliary drive shaft.
There is a coupling mechanism that uses a chain and a coupling gear. Well
Also, by changing the use of the sprockets and gears,
The rotation speed of the auxiliary drive shaft with respect to the main drive shaft is changed as appropriate.
It is possible to change.

Further, in the invention according to claim 3 of the present invention, the main constitution is a spinning method for polymer fibers, which is characterized in that the above-mentioned spinning apparatus is used for spinning polymer fibers.
That is , the sub-driving shaft is rotated at a higher speed than the main driving shaft, the metering pump is driven by the sub-driving shaft in the initial stage of spinning of polymer fibers, and the metering pump is driven by the main driving shaft during steady production. Driven by. In this case, particularly in the early stage of spinning when the spinnability deteriorates, the supply amount of the spinning dope is increased to increase the pressure of the spinning dope and the discharge amount is increased, so that all of the many ejection holes of the spinneret are It is possible to secure the spinnability by uniformly discharging the spinning dope in a prescribed direction.

In the invention according to claim 4 of the present application, the rotational speed of the auxiliary drive shaft is set to 1.5 to 4.0 times the specified rotational speed. The rotation speed of the auxiliary drive shaft is 1.5 times the specified rotation speed.
If it is at least twice, it is suitable for raising the spinning draft to judge the spinnability, and it is possible to prevent the spinning stock solution from being deteriorated and coagulated, which is preferable. Further, when the rotation speed of the auxiliary drive shaft is 4.0 times or less than the specified rotation speed, from the viewpoint of the load pressure, the metering pump, the spinneret and the like are not excessively burdened, and they are There is no risk of damage, so there is no practical problem.

The polymer fiber spinning apparatus and the spinning method thereof according to the present invention are particularly small in the discharge hole diameter of the spinneret, such as cellulose acetate fiber, and have a high magnification in the spinning step and the subsequent steps. When applied to a polymer fiber that cannot be stretched, it effectively exhibits the above-mentioned effects, and is particularly suitable for spinning a polymer fiber employing a spinneret having a pore size of 30 μmφ or less. Of course, the present invention is also applicable to polymer fibers, such as polyester fibers, which have a relatively large discharge hole diameter in the spinneret and which can be stretched at a high ratio in the spinning process or the subsequent process.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A polymer fiber spinning apparatus which is a preferred embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic view showing a main part of the present invention in the spinning device. The spinning apparatus 1 includes a plurality of spinning spindles (not shown), and each spinning spindle is connected with a metering pump 2 for supplying a spinning stock solution to the spinning spindle. Further, a plurality of metering pumps 2, 2, ... Connected to the respective spinning spindles are fixed to the frame 3 of the spinning apparatus 1 at a predetermined interval. The metering pump 2 has a connection switching unit 2a which is selectively connected between the two drive shafts 4 and 5 for driving either a main drive shaft 4 or a sub drive shaft 5 which will be described later.

Further, in the frame 3 of the spinning device 1,
A single main drive shaft 4 and a single sub-drive shaft 5 are rotatably supported in parallel with each other. The main drive shaft 4
Actuators 4a and 5a for transmitting rotations of the shafts 4 and 5 to the metering pump 2 to drive the metering pump 2 are provided to the auxiliary driving shaft 5 and the auxiliary driving shaft 5, respectively. The two operating parts 4 are provided at the same intervals as the intervals, that is, corresponding to each of the plurality of connection switching parts 2a.
a and 5a are arranged. Therefore, each metering pump 2 is driven separately by connecting its connection switching unit 2a to either one of the two operating units 4a and 5a arranged in each connection switching unit 2a. This connection switching unit 2
A conventionally known mechanism can be adopted for the mechanism of a and the operating portions 4a and 5a, and a separate connecting mechanism for both, and is not particularly limited. For example, the connection switching unit 2a and the operating units 4a and 5a may be coupled with each other by a connecting gear, and the connection switching unit 2a may be operated manually with an operating member such as a lever or by using an appropriate means. It may be movable between the two actuating parts 4a and 5a.

One end of the main drive shaft 4 is connected to a continuously variable speed type motor 7 by a connecting mechanism 6 using a chain 6a and sprockets 6b and 6c, and the main drive shaft 4 reduces the yarn quality. It is driven to rotate at a specified number of revolutions, which allows spinning without spinning. On the other end side of the main drive shaft 4, a relay drive shaft 8 is provided between the main drive shaft 4 and the sub drive shaft 5.

The main drive shaft 4 and the relay drive shaft 8 are connected by a connecting mechanism 9 using a chain 9a and sprockets 9b and 9c. The sprocket 9b arranged at the end of the main drive shaft 4 has a larger diameter than the sprocket 9c of the relay drive shaft 8, and a connecting mechanism including two sprockets 9b and 9c having different diameters. Reference numeral 9 constitutes the shifting means of the present invention. By the speed change device 9, the rotation of the main drive shaft 4 is transmitted to the relay drive shaft 8 by increasing the rotation speed thereof, and the relay drive shaft 8 is rotated at a higher speed than the main drive shaft 4.

The relay drive shaft 8 and the auxiliary drive shaft 5 are provided with a chain 10a and two sprockets 1 having the same diameter.
0b, 10 are connected by the connecting mechanism 10 using a c, rotation of the relay drive shaft 8 is transmitted to the auxiliary drive shaft 5 without changing its rotational speed. As described above, the rotational drive of the main drive shaft 4 is transmitted to the sub drive shaft 5 through the relay drive shaft 8 while changing the rotation speed thereof, that is, the sub drive shaft 5 is also transferred to the main drive shaft 5. It is rotationally driven by a motor 7, which is the same power source as the drive shaft 4. Therefore, in the spinning device 1, two different drive shafts 4,
Since 5 is driven by a single power source, the power energy can be significantly reduced as compared with a conventional spinning device that requires a separate power source, and the manufacturing cost can be kept low.

The relay drive shaft 8 has a sprocket 10b for coupling with the auxiliary drive shaft 5, and the relay drive shaft 8 also.
Of the relay drive shaft 8 and the auxiliary drive shaft 5 can be brought into contact with or separated from each other by operating the clutch mechanism 11 with the operation lever 11a. it can. Therefore, the drive rotation of the auxiliary drive shaft 5 can be stopped except when necessary.

When polymer fibers are spun using the above spinning device, the motor 7 is operated with the connection switching portion 2a of the total metering pump 2 being connected to the operating portion 4a of the main drive shaft 4. The rotational drive of the main drive shaft 4 is increased to a specified rotation speed, and the metering pump 2 is driven at the specified rotation speed. At the initial stage of spinning, the spinning direction of the stock solution for spinning from the spinneret of the spinning device 1 and the amount of discharge from each discharge hole are not constant, resulting in poor spinnability. Therefore, the clutch mechanism 11 is connected to rotate the sub drive shaft 5 at a speed higher than the specified rotation speed, and the connection of the connection switching unit 2a is switched to the operation unit 5a of the sub drive shaft 5 to perform the quantitative determination. The pump 2 is rotationally driven at a rotation speed higher than the specified rotation speed. As described above, the metering pump 2 is driven to rotate at a high speed and is spun under a high discharge condition, whereby the discharge direction of the spinning dope from the spinneret is set in a prescribed direction, and the discharge amount from all discharge holes is also constant. , The normal spinnability is secured. Thereafter, the connection of the connection switching unit 2a is switched to the operating unit 4a of the main drive shaft 4 again, and the metering pump 2 is driven at the specified rotation speed to ensure normal spinnability and yarn quality. The polymer fibers can be spun in good condition. In addition, the connection of the connection switching unit 2a is connected to the main drive shaft 4
After switching to the operating portion 4a of the clutch mechanism 1
1 is cut to stop the rotational drive of the auxiliary drive shaft 5.

Further, in the spinning step, when the spinning performance of the spinning dope from the spinning spindle connected to any of the metering pumps 2 is deteriorated, the connection switching section 2a of the metering pump 2 is connected.
By individually switching only to the actuating part 5a of the sub-driving shaft 5 and driving the metering pump 2 at a rotation speed higher than the specified rotation speed to perform spinning under high discharge conditions, the spinning performance is improved again. After the spinning, the operation portion 4a of the main drive shaft 4 is switched again to continue spinning at a specified rotation speed that does not reduce the yarn quality. In this way, if the spinnability deteriorates even a little, the spinnability can be easily improved immediately, and further, in order to prevent the spinnability from deteriorating, it is rotated at a high speed every certain usage time. By switching the number and spinning under high discharge conditions, it is not necessary to frequently wash the spinneret as in the conventional case, and the manufacturing efficiency can be significantly improved.

In the connecting mechanism 9 arranged between the main drive shaft 4 and the relay drive shaft 8 in this embodiment, a plurality of sprockets having different diameters are provided on the main drive shaft 4 or the relay drive shaft 8. And the chain 9a can be interchanged between a plurality of sprockets using a known means.
The rotation speed of the relay drive shaft 8 can be changed to another stage.

Further, the main drive shaft 4 and the sub drive shaft 5,
The coupling with the relay drive shaft 8 is not limited to the coupling mechanism using the chain and the sprocket, and a coupling gear may be adopted. Further, the rotational speed of the sub drive shaft 5 is further connected by appropriately changing the diameters of the sprockets 9b and 9c of the speed changing means 9 arranged between the main drive shaft 4 and the relay drive shaft 8. When the gear for use is used, it can be easily changed to various values by appropriately changing the specifications. The rotation speed of the sub drive shaft 5 is set in a range that does not cause any practical problem in consideration of the strength of the spinneret, and the rotation speed of the sub drive shaft 5 is the rotation speed of the main drive shaft 4, that is, the specified value. The rotation speed is preferably 0.5 to 4.0 times.

Further, in the present embodiment, the connecting mechanism 9 arranged between the main drive shaft 4 and the relay drive shaft 8 is used as the speed changing means, but it is arranged between the relay drive shaft 8 and the auxiliary drive shaft 5. in connection mechanism 10 that is, the by a smaller diameter than the sprocket 10 c side of the diameter of the side of the auxiliary drive shaft 5 sprocket 10b the relay drive shaft 8, it is also possible to change the rotational speed.

Thus, the relay drive shaft 8 and the auxiliary drive shaft 5
When the coupling mechanism 10 disposed between the clutch mechanism 11 and the clutch mechanism 11 is used as a speed changing means for changing the rotation speed to a high speed, a further coupling mechanism is disposed on the other side, and in the coupling mechanism, the auxiliary drive is used. The diameter of the sprocket on the side of the shaft 5 may be set larger than that of the sprocket on the side of the relay drive shaft 8, and the sub drive shaft 5 may be rotationally driven at a rotational speed lower than that of the main drive shaft. At this time, it is preferable that the clutch mechanism 11 can be selectively connected between the coupling mechanism 10 that changes the rotation speed to a high rotation speed and the coupling mechanism that changes the rotation speed to a low rotation speed. In this case, if repair processing such as changing the spinneret is required on any of the spinning spindles, rotate it at a low speed to process it, and then rotate it at a high speed to perform spinning again. It is possible to secure the property.

[0037]

EXAMPLES Preferred examples of the present invention will be given below.
A specific description will be made in comparison with a comparative example. In the example, the spinning apparatus 1 according to the preferred embodiment of the present invention described above is used,
Cellulose triacetate fibers were spun as polymer fibers by the spinning method of the present invention. At this time, in the initial stage of spinning, the metering pump 2 is driven at a speed higher than the specified rotation speed by the auxiliary drive shaft 5 to ensure the spinnability, and then the main drive shaft 4 reduces the rotation speed to the specified rotation speed to remove the polymer fibers. Spun out. Moreover, in the comparative example, the same cellulose triacetate fiber was spun under the usual production conditions using the conventional spinning device.

In both Examples and Comparative Examples, as the spinning dope, cellulose triacetate having an average acetylation degree of 61.6% was dissolved in a mixed solvent of methylene chloride / methanol (= 91/9) to give a solid content concentration of 21. The one prepared by adjusting to 0.0% by weight is used.

Under the same conditions (scale, period, running conditions) with respect to the spinnability and spinning stability during spinning, and the yarn quality (elongation) and post-process passability of the obtained fiber. The results are shown in Table 1. -Spinnability: Basically, the spinning solution is normally discharged from all the discharge holes of the spinneret in a predetermined direction. In principle, if the spinneret cannot be discharged normally, the spinneret is replaced. The average value of the number of spinnerets used for spinning with the spinning spindle No. 1 (the number of spinnerets used / spindle weight) was shown as a criterion for evaluating the spinnability. -Spinning stability: Full tube yield (%)-Yarn quality (elongation): It is the average value of the data measured using Orientec ASC-A5YM. Post-process passability: ◯ is good, Δ is slightly bad, and x is bad.

"Example 1" The discharge hole diameter is 0.024 mm.
While interlacing at a winding speed of 500 m / min, using a spinneret with a discharge hole having a cross-sectional shape of φ and the discharge hole of O, and a length of the cylindrical capillary portion of 0.010 mm. The above spinning dope was spun by a dry spinning method to test-spun 84 dtex, 75 filaments of cellulose triacetate fiber composed of monofilaments having an average fineness of 1.1 dtex. At this time, the main drive shaft is rotated at a specified rotation speed, the auxiliary drive shaft is driven to rotate at a high speed at 1.5 times the specified rotation speed, and the metering pump is rotated at a high speed in the initial stage of spinning. Driven by a shaft and spinning at a discharge rate as high as 1.5 times the production condition, and then after the spinning performance stabilizes, the metering pump drive is switched to the main drive shaft to achieve the discharge amount of the production condition. It spun out. At this time, the spinnability and spinning stability were both good. In addition, the yarn quality and the post-process passability of the obtained fiber were good.

[Example 2] The discharge hole diameter is 0.022 mm.
While interlacing at a winding speed of 300 m / min, using a spinneret with a discharge hole having a cross-sectional shape of φ and the discharge hole of O and a cylindrical capillary portion having a length of 0.010 mm. Then, the above spinning solution was spun by a dry spinning method, and a cellulose triacetate fiber having 66 dtex and 80 filaments composed of single fibers having an average fineness of 0.83 dtex was trial-spun. At this time, the main drive shaft is rotated at the specified rotation speed, and the auxiliary drive shaft is rotated at the specified rotation speed of 3.
It is driven at a high speed at 0 times the rotational speed, and in the initial stage of spinning, the metering pump is driven by the auxiliary drive shaft that rotates at a high speed.
The spinning rate was doubled, and then, after the spinning rate became stable, the drive of the metering pump was switched to the main drive shaft, and the spinning rate was controlled under the production conditions. At this time, the spinnability and spinning stability were both good. In addition, the yarn quality and the post-process passability of the obtained fiber were good.

"Comparative Example 1" Using the same spinneret as in Example 1, the above spinning dope was spun at the discharge rate of the production conditions from the initial spinning stage, while performing interlacing at a winding speed of 500 m / min. By the dry spinning method, the average fineness is 1.
An 84 dtex, 75 filament cellulose triacetate fiber composed of 1 dtex single fiber was trial-spun. At this time, the spinnability was extremely poor, and the spinning stability was a situation in which there were many yarn breakages at the beginning and it was not a stable spinning, but the yarn quality of the obtained fiber was slightly low The passability was good.

"Comparative Example 2" Using the same spinneret as in Example 2, the above spinning dope was spun from the initial stage of spinning at a discharge rate of production conditions, and interlaced at a winding speed of 300 m / min. , The average fineness of 0.
A 66 dtex, 80 filament cellulose triacetate fiber composed of 83 dtex monofilaments was trial spun. Both the spinnability and spinning stability were extremely poor and the spinning was unstable. In addition, the quality of the obtained fiber was poor and the post-process passability was also poor.

[0044]

[Table 1]

[0045]

The polymer fiber spinning apparatus of the present invention is provided with a main drive shaft and a sub drive shaft that rotate at different rotational speeds, and a metering pump can be connected to either drive. When polymer fibers are spun by the spinning method of the present invention using such a spinning device, for example, the main drive shaft is driven at a rotational speed that can secure the yarn quality, and the sub drive shaft is faster than the main drive shaft. When the spinning performance is poor, such as in the initial stage of spinning, the metering pump is connected to a sub-driving shaft that rotates at high speed to ensure the required spinning performance, and then the main driving shaft is switched to Spinning is possible while maintaining the quality. Therefore, it becomes possible to spin ultrafine polymer fibers, which have been impossible to spin up to now, and the polymer fibers can be stably and industrially produced. Further, since the main drive shaft and the auxiliary drive shaft are driven by a single power source, it is possible to reduce power energy as compared with the case where they are driven by separate power sources, and a low cost polymer Can provide fibers.

[Brief description of drawings]

FIG. 1 is a schematic view of a spinning device for polymer fibers according to a preferred embodiment of the present invention.

[Explanation of reference numerals] 1 spinning device 2 metering pump 2a connection switching unit 3 frame 4 main drive shaft 4a operating unit 5 auxiliary drive shaft 5a operating unit 6 connection mechanism 6a chains 6b and 6c sprocket 7 motor 8 relay drive shaft 9 connection mechanism ( Transmission means 9a Chains 9b, 9c Sprocket 10 Coupling mechanism 10a Chains 10b , 10c Sprocket 11 Clutch mechanism 11a Operating lever

Continuation of the front page (56) References JP-A-59-47407 (JP, A) JP-B 13-18332 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) D01D 1 / 06-1/09

Claims (4)

(57) [Claims] 1. A plurality of spinning spindles, a plurality of metering pumps connected to each spinning spindle for supplying a spinning dope to the spinning spindles, and a plurality of said metering pumps commonly driven at a prescribed rotation speed during production. A single main drive shaft and a single auxiliary drive shaft for driving the metering pump at a rotational speed different from the specified rotational speed, wherein the metering pump is either the main drive shaft or the auxiliary drive shaft. A spinning device for polymer fibers comprising a connection switching portion selectively connected to the drive of, wherein the main drive shaft and the sub drive shaft are provided by a single power source,
Each of them is driven and rotated at a required number of rotations, and the main drive shaft and the sub drive shaft are relayed by a connecting mechanism.
Is connected via a drive shaft and is arranged at the end of the relay drive shaft.
The relay drive shaft and the auxiliary drive shaft via a clutch mechanism
A spinning device for polymer fibers, characterized in that and can be separated from each other . 2. The spinning device according to claim 1, wherein the main drive shaft and the sub drive shaft are connected via a speed change device. 3. The spinning device according to claim 1 or 2, wherein the sub drive shaft is rotated at a higher speed than the main drive shaft, and the metering pump is set to the sub drive shaft at an initial stage of spinning of polymer fibers. And spinning the polymer fiber by driving the metering pump by the main drive shaft during steady production. 4. The spinning method according to claim 3, wherein the rotation speed of the auxiliary drive shaft is set to 1.5 to 4.0 times the specified rotation speed.