JP2000282319A - Melt spinning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a melt spinning apparatus capable of extremely reducing the required machining accuracy of each spinning nozzle of a cap, and enabling fibers obtained by arbitrarily combining every single filament having different shapes and thicknesses to be produced by installing a polymer-distributing member having a specific structure at the upstream side of the cap having a plurality of spinning nozzles. SOLUTION: A polymer-distributing member 3 having polymer passages 4 regulating the amounts of polymer flowing into each spinning nozzles 2 so as to correspond to each of the nozzles 2 is installed in the upstream side of a cap having a plurality of the spinning nozzles 2. Each of the polymer passages 4 of the polymer-distributing member 3 has a resistance of the flow-passage larger than, preferably twice or more of that of the corresponding spinning nozzle 2. The polymer-distributing member 3 is composed of a porous material consisting of a sintered body of a metal powder, and each of the polymer passages 4 is formed in the porous material. The polymer-distributing member 3 is arranged so as to come into contact with a cap 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melt spinning apparatus, and more particularly to a melt spinning apparatus capable of suitably controlling the flow rate of a polymer discharged from a large number of spinning holes of a die for each spinning hole.

[0002]

2. Description of the Related Art Generally, in the spinning of synthetic fibers, a plurality of single yarns spun from each of the spinning holes of the die and taken out are formed as multifilament yarns using a die having a large number of spinning holes. ing. The multifilament yarn is used for weaving as it is, or cut to an appropriate length, spun, and used for weaving. A breaker plate, which is usually a perforated plate, is arranged on the upstream side of the spinneret in the polymer flow direction, and a wire mesh or a filter is arranged on the upstream side. This breaker plate generally receives a filter located on the upstream side of the breaker plate, and increases the back pressure by the breaker plate to equalize the discharge amount of each spinning hole.
It is responsible for protecting the base against excessive pressure.

[0003]

However, the structure of the conventional general melt spinning apparatus as described above basically has the following problems.

[0004] Since a large number of holes formed in the breaker plate do not correspond one-to-one with the respective spinning holes formed in the die, they flow into the respective spinning holes through the breaker plate. The inflow amount of the polymer varies more or less due to the variation in the shape of the flow path leading to the spinning hole. Therefore, with such a conventional structure, it is basically difficult to equalize the amount of polymer flowing into each spinning hole and, consequently, the amount of polymer discharged from each spinning hole, or to regulate it to a desired flow rate.

In the conventional melt spinning apparatus, since the resistance of each spinning hole of the die is much larger than the resistance of each hole of the breaker plate, the discharge amount from each spinning hole is reduced. In order to achieve uniformity or to regulate the discharge amount to a desired value, extremely high processing accuracy of the spinning hole has been required. For this reason, the processing cost of the die has been extremely high.

Further, in a spinneret having a large number of spinning holes requiring high processing costs, the specifications of the spinning hole (for example, the diameter [thickness of a single yarn to be spun] and the shape [for a single yarn having a circular cross section] Holes, holes for irregularly shaped yarns, and holes for hollow fibers]) cannot be easily changed, and it is necessary to replace the base itself, and extremely expensive operation is required.

SUMMARY OF THE INVENTION In view of the above situation, it is an object of the present invention to make it possible to reduce the processing accuracy of a spinning hole of a die and to control a desired polymer inflow amount into each spinning hole of the die. In addition, the present invention provides a low-cost, melt-spinning apparatus capable of meeting a variety of production demands, in which each single yarn spun from each spinning hole can be easily made uniform or intentionally different. Is to do.

[0008]

In order to solve the above-mentioned problems, a melt spinning apparatus according to the present invention is provided on an upstream side of a spinneret having a plurality of spinning holes, so as to correspond to each spinning hole. And a polymer distribution member provided with a polymer flow path for regulating the polymer inflow amount.

In this melt spinning apparatus, it is preferable that each polymer flow path of the polymer distribution member has a flow path resistance larger than the flow resistance of the corresponding spinning hole, and particularly the flow resistance of the corresponding spinning hole. It is preferable to have a passage resistance of twice or more. By providing a significant difference in the flow path resistance in this way, the resistance of the polymer flow path of the polymer distribution member occupies a large weight and becomes dominant with respect to the total resistance in the polymer flow direction. The flow path allows the amount of polymer flowing into each spinning hole to be regulated more accurately, and the accuracy difference between each spinning hole is not so effective against variations in flow path resistance, so that the processing accuracy of the spinning hole can be reduced. Become.

[0010] The polymer distribution member can be composed of, for example, a porous material, and has a desired flow resistance in the porous material, and can form polymer flow paths substantially isolated from each other. The porous material can be composed of, for example, a sintered body, particularly a sintered body of metal powder (for example, a sintered body of stainless steel powder). Also, as the polymer distribution member,
It may be composed of a wire mesh, and each polymer channel may be formed in the wire mesh.

Each polymer flow path of such a polymer distribution member can have a gel crushing or gel capturing function. In particular, in the case of a polymer distribution member made of a sintered body of a metal powder, it is possible to impart a substantially complete gel crushing or gel trapping function to each polymer flow path having a desired resistance formed in the sintered body.

In order to separate the polymer flow paths in the polymer distribution member from each other, it is possible to adopt a configuration in which another member is embedded in the polymer distribution member to form each polymer flow path. It is also possible to constitute the partition itself and separate the polymer flow paths from each other by the partition itself. As a member to be embedded or a partition member, a member having a circular hole or a square hole arranged at a predetermined position, a honeycomb-shaped member, or the like can be used.

In addition, the porous material or the metal net constituting the polymer distribution member is partially compressed to give the partitioning function to the compression section, and to form polymer channels substantially separated from each other between the compression sections. You can also.

The polymer distribution member may be disposed immediately upstream of the die so as to be in direct contact with the die, and between the polymer distribution member and the die, the spinning of the die corresponding to each polymer flow path of the polymer distribution member. It is good also as a structure in which the base plate which has a communication path with a hole is interposed. In the case of the latter structure, the amount of the polymer flowing into the spinning hole of the corresponding die can also be regulated by the cooperation of each polymer flow path of the polymer distribution member and the communication path of the die upper plate.

[0015] Each polymer flow path of the polymer distribution member includes:
Since the flow rate of the polymer generally tends to be higher toward the center of the flow path, if the polymer flow path closer to the center of the polymer distribution member is formed to have a higher resistance, the polymer flows into each spinning hole of the die. The amount can be made uniform in the radial direction. The resistance of each polymer flow path of the polymer distribution member can be changed by changing the thickness of the polymer distribution member in the radial direction or by changing the density of the polymer distribution member in the radial direction.

Through each polymer flow path of the polymer distribution member,
The inflow amount of the polymer flowing into each spinning hole of the corresponding spinneret may be regulated to a substantially uniform inflow amount, or may be intentionally regulated to two or more different inflow amounts. In the case where two or more types of polymer inflow are regulated, two or more types of single yarns having different thicknesses are spun from one die, and a multifilament yarn having various textures can be freely created. Become like

Further, if the polymer distributing member and the base as described above are configured to be relatively rotatable around the central axis, by rotating the polymer distributing member, each polymer flow path of the polymer distributing member and the The corresponding relationship between each spinneret and the corresponding spinneret can be changed. Therefore, the amount of polymer flowing into each spinning hole can be varied by the relative rotation, and the combination of the thickness of each single yarn spun from each spinning hole can be freely changed.

By disposing a filter having higher filtration accuracy than the polymer distribution member on the upstream side of the polymer distribution member, the upstream filter mainly has a polymer filtering function, and the downstream polymer distribution member is provided with a filter function. In addition to the function of regulating the amount of polymer flowing into each spinning hole of the spinneret, it can also be equipped with a gel crushing or gel capturing function for the polymer that has passed through the filter. Role can be played. As the filter, for example, a metal fiber sintered body (for example, a stainless fiber sintered body) can be used.

In the melt spinning apparatus according to the present invention, the spinneret is divided into an upper spinneret and a lower spinneret in a polymer flow direction, and the spinning for determining the cross-sectional shape of each single yarn from which the lower spinneret is spun. An aperture, wherein the upper die is substantially configured as a polymer distribution member, and the upper die has a polymer flow path corresponding to each spin hole and for regulating the amount of polymer flowing into each spin hole. It can also be configured.

In this case, the upper die plays a role of measuring the polymer flow rate by the polymer flow path, and is regulated at a predetermined flow rate, and the polymer flowing into each spinning hole is supplied to each spinning hole of the lower die. From a predetermined cross-sectional shape.
In other words, the function of regulating the amount of polymer flowing into each spinning hole by each polymer flow path of the upper die and imparting the cross-sectional shape of each yarn to each spinning hole of the lower die is almost completely separated. The shape of each polymer flow path provided in the upper die may be a simple flow path shape without a filter function, but each polymer flow path has a flow path cross-sectional area smaller than the entrance of each corresponding spinning hole. It is preferable that each of the polymer flow paths is formed to have a higher resistance than each of the corresponding spinning holes.

Each of these polymer flow paths can be easily formed by a nozzle tip mounted in each mounting hole formed in the upper die.

It is preferable that a filter is arranged upstream of the upper base. As the configuration of the filter itself, for example, a metal fiber sintered body can be used as in the above-described embodiment.

Further, in the melt spinning apparatus according to the present invention, it is possible to secure a larger space on the upstream side of the die in the housing of the melt spinning apparatus than in the conventional apparatus. For example, a disk filter (for example, a laminate of a plurality of disk filters) can be accommodated. The use of a disc filter also enables the accuracy of filtration to be further improved.

The spinning holes in the melt spinning apparatus according to the present invention can be formed by directly drilling holes in the spinneret body, but each spinning hole is formed by a nozzle tip mounted in each mounting hole formed in the spinneret. It can also be configured. In particular, in the case of a two-stage die structure of an upper die and a lower die, each spinning hole is formed by a nozzle tip attached to each mounting hole formed in the lower die, and around the upper part of the nozzle tip. An annular space may be formed between the lower base and the annular base, and the annular spaces may be connected to each other through a heat medium passage. The ratio L / L of the length and diameter of the polymer flow channel in the melt spinning apparatus according to the present invention is used.
D is preferably 5 or more. This large L
/ D, a relatively large diameter (for example,
Even if the diameter is about 0.2 mm), the polymer flow path can be provided with a large resistance to provide a desired flow control function, and the relatively large diameter facilitates the processing of the polymer flow path. Is done.

As described above, in the melt spinning apparatus according to the present invention, by providing the polymer distribution member having the polymer flow path for controlling the polymer inflow amount corresponding to each spinning hole, the individual spinning hole is provided. The desired polymer inflow can be controlled, and it becomes very easy to make the individual yarns spun from the respective spinning holes uniform or intentionally different.

In addition, since the amount of polymer flowing into each spinning hole is dominantly controlled by the polymer distribution member on the upstream side, each spinning hole of the die has a very high processing accuracy due to the regulation of the polymer flow rate. It is no longer required, and the manufacturing cost of the base is significantly reduced. Since the polymer distribution member can be manufactured much cheaper than the die, the cost of the whole melt spinning apparatus is greatly reduced.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a melt spinning apparatus according to one embodiment of the present invention. In the drawing, reference numeral 1 denotes a spinneret having a plurality of spinning holes 2, and a polymer distribution member 3 is provided upstream of the spinneret 1 in the polymer flow direction so as to directly contact the upper surface of the spinneret 1 in this embodiment. I have. In the present embodiment, the polymer distribution member 3 is made of a porous material, in particular, a sintered body of metal powder.
The polymer distribution member 3 is formed with a polymer flow path 4 corresponding to each of the spinning holes 2 for regulating the amount of polymer flowing into each of the spinning holes 2 to a predetermined flow rate. However, the polymer distribution member 3 can be made of, for example, a wire mesh, and in this case, the polymer flow path 4 can be similarly formed.

In the present embodiment, each polymer flow path 4 is formed by partially compressing the polymer distribution member 3 so as to increase the density of the compressed portion and substantially forming the partition wall portion 5 so as to form the polymer flow path 4. They are separated from each other. The formation of the partition 5 prevents the polymer from slipping between the polymer flow paths 4 in the polymer distribution member 3. Partial compression of the polymer distribution member 3 for forming the partition wall portion 5 may be performed at the stage of molding the polymer distribution member 3, and using the tightening with the die 1, around the upper end of each spinning hole 2. May be compressed.

In the present embodiment, the upper end of each spinning hole 2 is formed in a shape that is expanded upward in a trumpet shape, and the lower end is narrowed as a discharge hole 6 to a small diameter.
The cross-sectional shape of the discharge hole 6 can be any shape such as a circle, a triangle, a quadrangle, another polygon, and a discharge hole shape for a hollow fiber.

Each polymer flow path 4 in the polymer distribution member 3 has a flow resistance greater than the flow resistance of the corresponding spinning hole 2, and in particular, is higher than the discharge hole 6 of the corresponding spinning hole 2. It has a large flow resistance. Preferably, 2
It has a channel resistance that has a significant difference of more than twice.

In the melt spinning apparatus configured as described above, the polymer flowing from the upstream side is distributed and flows into each polymer flow path 4 of the polymer distribution member 3. Since the polymer that has flowed into each polymer flow path 4 is prevented from sliding in the polymer distribution member 3 by the partition wall 5, it passes through each polymer flow path 4 while maintaining the distribution state at the time of flow. Into each of the spinning holes 2. That is, the individual polymer flow paths 4 and the individual spinning holes 2 correspond one-to-one, and the amount of polymer distributed to each of the predetermined inflow amounts flows into each of the spinning holes 2 as it is.

The polymer that has flowed into each spinning hole 2 is spun out from each discharge hole 6 as a single yarn. At this time, each discharge hole 6
Since the flow resistance in each polymer flow path 4 is higher than the flow resistance in the above, the distribution amount of the polymer sent from the upstream side depends on the flow resistance of each polymer flow path 4 due to the pressure loss. Determined dominantly. That is, the polymer distribution is substantially determined by each polymer flow path 4 of the polymer distribution member 3, and once determined, the distribution state is maintained, and the inflow into each spinning hole 2 and each spinning hole 2 Since the discharge from the discharge holes 6 is performed, the final discharge amount from each of the discharge holes 6 is regulated by each of the polymer flow paths 4 of the polymer distribution member 3. Therefore, in order to control the discharge amount from each of the discharge holes 6, the spinning holes 2, particularly the discharge holes 6
It is no longer necessary to process the yarn with high precision, and even when the processing accuracy of the spinning hole 2 is relaxed, it is possible to control the amount of polymer actually discharged for each single yarn to a desired amount. .

As a result, by controlling the polymer flow rate (polymer distribution amount) of each polymer flow path 4 to a desired flow rate, the spinning amount from each spinning hole 2 can be controlled to a desired discharge amount. Can be. Therefore, it is possible to spin a multifilament yarn in which each single yarn is controlled to a desired thickness or the like. The control of the thickness of each single yarn can be uniform or can be intentionally varied freely.
In the latter case, it is possible to freely produce multifilament yarns having various feelings.

In the above embodiment, the case where the spinning hole 2 is formed directly on the die 1 has been described.
The present invention is also applicable to a die of a type in which a nozzle tip for forming each spinning hole is embedded.

For example, as shown in FIG. 2, a base 15 having a communication path 15 between the base 11 and the polymer distribution member 12 for communicating with each of the polymer channels 13 of the polymer distribution member 12 and the corresponding spinning hole 14 of the base 11. A structure in which the upper plate 16 is interposed can be used. Each spinning hole 14 is formed in a nozzle tip 18 mounted in each mounting hole 17 of the die 11. The material of the nozzle tip 18 is not particularly limited, but can be made of, for example, ceramic. With such a configuration,
Each nozzle tip 18 can be formed separately from the main body of the base 11, and if they are mounted so as to be embedded in the base 11, a desired base 11 is completed.

In this embodiment, in particular, a seal ring 19 (for example, a silver ring or an aluminum ring) is provided on the upper shoulder of the nozzle tip 18 mounted in each mounting hole 17 of the base 11.
This portion can be sealed by pressing and deforming it with the base plate 16.
That is, the base plate 16 is formed by the communication path 15
The polymer distributed from each polymer flow path 13 of the polymer distribution member 12 is surely guided to the corresponding spinning hole 2, and each nozzle tip 18 is pressed and fixed.
9 has a function of pressing and deforming 9 to seal the portion.

Also in such a melt spinning apparatus, in the polymer distribution member 12, the polymer sent from the upstream side is distributed to each polymer channel 13, and the distributed polymers are separated from each other in the polymer distribution member 12. In this state, the fluid flows into the corresponding individual spinning holes 14 through the communication portions 15. Since the distribution state of the polymer distribution member 12 to the respective polymer flow paths 13 is maintained as it is and finally discharged from the individual spinning holes 14, the thickness of each single yarn spun from each of the spinning holes 14 is also accurately determined. It is controlled to the thickness of. Further, since the flow path resistance of each polymer flow path 13 is larger than the flow path resistance of the corresponding spinning hole 14, the polymer distribution member 12 becomes dominant with respect to distribution, and the desired distribution is accurately obtained at the stage of the polymer distribution member 12. It is distributed in the amount of the polymer, so that each spinning hole 14 does not need to have such a high processing accuracy.

FIG. 3 shows a melt spinning apparatus according to still another embodiment of the present invention. In this embodiment,
A filter 22 is further provided upstream of the polymer distribution member 21. The filter 22 has higher filtration accuracy than the polymer distribution member 21, and is made of, for example, a metal fiber sintered body (for example, a stainless steel sintered body).

Each polymer flow path 24 is formed in the polymer distribution member 21 by a partition wall 23 formed by compression (in this embodiment, compression formed in advance from above). In the present embodiment, each polymer flow path 24 is formed such that the closer the polymer flow path 24 to the center of the polymer distribution member 21 is, the higher the resistance is. In this embodiment, the resistance difference is given by a change in density due to a change in the thickness of the polymer flow path 24 of the polymer distribution member 21. That is, FIG.
As shown schematically, the polymer distribution member 21 is formed such that, as viewed in cross section, the thickness becomes smaller as it approaches the center 25 as a whole and increases as it approaches the outer peripheral side.

The communication passage 2 is located downstream of the polymer distribution member 21.
A base 30 having a spinning hole 29 formed by a nozzle tip 28 is arranged downstream of the base plate 27 having the base 6. In the present embodiment, sealing materials 32 and 33 (seal rings) are provided at the upper end and the middle step of the nozzle tip 28 with respect to the mounting hole 31 of the base 30, respectively, and the sealing materials 32 and 33 are pressed. Each part is sealed by deformation. The outer peripheral portion of the base plate 27 and the base 3
Between the outer peripheral portions 0, fitting structures 34 that fit each other are provided.

In the melt-spinning apparatus thus configured, a high-precision filter 22 is disposed upstream of the polymer distribution member 21 so that the filter 22 can exhibit high filtration performance and capture foreign matter. . The gel that is not crushed by the filter 22 is supplied to the downstream polymer distribution member 21.
By the respective polymer flow paths 24, particularly the respective polymer flow paths 24 formed by the metal powder sintered body, the crushing can be performed almost completely, the functions of the respective parts can be separated, and the respective parts can exhibit the most desirable functions. .

By increasing the density of each polymer flow path 24 toward the center of the polymer distribution member 21, the flow resistance of each polymer flow path 24 can be increased toward the center of the polymer distribution member 21. In general, it becomes possible to make the flow rate distribution of the polymer that is more likely to flow toward the center substantially uniform or a desired flow rate distribution.

This flow rate distribution can be corrected by changing the thickness of the polymer distribution member 21 by changing the thickness of the polymer distribution member 21 as described above. The system may be changed in the radial direction of the polymer distribution member 21 to change the flow path length of the polymer flow path 24, or a combination of both methods is also possible. Other operations and effects are similar to those of the above-described embodiment.

FIG. 5 shows a melt spinning apparatus according to still another embodiment of the present invention. In the present embodiment, in particular, the cross-sectional shape of the communication passage 42 of the base plate 41 is changed, and each of the polymer passages 44 of the polymer distribution member 43 and the corresponding communication passage 42 cooperate with each other. The amount of polymer flowing into each of the spinning holes 46 of the base 45 is regulated. In the present embodiment, the resistance of the flow path from each polymer flow path 44 to the spinning hole 46, which is controlled as a result of the above-described regulation, is adjusted by the base 45 (the base plate 41 or the polymer distribution member 4).
3) is set to be higher toward the center and lower toward the outer periphery, so that the amount of polymer discharged from each of the spinning holes 46 is made uniform or has a desired radial distribution. Is set. More specifically, the communication passage 42 of the base plate 41 is formed so as to be closer to the straight pipe shape toward the center side so that the communication passage 42 of the base plate 41 is located more radially outwardly and opens upwardly in a trumpet shape. ing. Other configurations are in accordance with the embodiment shown in FIG. 3, and the corresponding members and parts are denoted by the same reference numerals as those in FIG.

In the melt spinning apparatus configured as described above, each of the polymer flow paths 44 of the polymer distribution member 43 is formed substantially uniformly, and from each of the polymer flow paths 44 to each of the spinning holes 46 through each of the communication paths 42. The role of the communication passage 42 can be made to play the role of equalizing the flow rate of the polymer to be flowed in or regulating and distributing the flow rate to the desired flow rate with higher accuracy. Since the base plate 41 can be processed more easily than the polymer distribution member 43, it is possible to facilitate the manufacture of the entire apparatus. Other operations and effects are similar to those of the above-described embodiment.

FIG. 6 shows a melt spinning apparatus according to still another embodiment. In the present embodiment, a partition member 52 separate from the material constituting the polymer distribution member 51 is mounted or embedded in the polymer distribution member 51,
The polymer distribution member 51 is constituted as a whole. In the present embodiment, the partition member 52 separates the polymer channels 54 from each other together with the partition 53 formed by compressing the constituent material (for example, a sintered metal powder) of the polymer distribution member 51. The partition member 52 can be composed of, for example, a honeycomb plate 55 as shown in FIG. 7 and a perforated plate 57 having a large number of circular holes 56 as shown in FIG.

In the embodiment shown in FIG. 6, the polymer distribution member 51
On the downstream side of the base plate 5 with the shape of the communication passage 58 changed
9 is a nozzle tip 6 having a spinning hole 60 downstream thereof.
A base 63, which is fixed in the mounting hole 62, is disposed. The fixing and sealing of the nozzle tip 61 are performed using sealing materials 64 and 65.

In such a melt spinning apparatus, the partition member 52 composed of the honeycomb plate 55 and the like is provided with the polymer distribution member 5.
By being provided in one, each polymer flow path 54 is separated more reliably. Further, even though the cross-sectional shape of each polymer flow path 54 separated by the partition member 52 is uniform,
By changing the cross-sectional shape of each communication path 58, the amount of polymer flowing into each corresponding spinning hole 60 can be regulated to a desired amount.

For example, as shown in FIG.
The cross-sectional area of the upper end of the three types of communication holes 58 of large, medium and small
a, 58b, 58c, and each communication passage 58a, 58
If b and 58c are arranged in a desired state, single yarns having different thicknesses are simultaneously spun in the desired arrangement state.
Other operations and effects are similar to those of the above-described embodiment.

Further, with respect to each polymer flow path of the polymer distribution member, it is also possible to constitute a polymer flow path such that the amount of polymer flowing into each of two or more kinds of spinning holes can be achieved. Each of the polymer flow paths can be arranged arbitrarily, or the same type of polymer flow path can be set in each area.

As shown in FIG. 10, for example, as shown in FIG. 10, each circular hole of the porous plate 61 constituting the partition member of the polymer distribution member is divided into three types of large, medium and small circular holes 62a. , 62b, 62c, and each circular hole 62a, 6
2b and 62c can be arranged in each of the fan-shaped regions 63a, 63b and 63c.

The perforated plate 61 as a partition member as described above
By using the polymer distributing member provided with the above, single yarns having different thicknesses can be simultaneously spun from the spinning holes of the die in accordance with the respective regions 63a, 63b and 63c.

Each of the regions 63a, 63b, 63c
In response to this, for example, as shown in FIG. 11, if the cross-sectional shapes of the discharge holes of the respective spinning holes of the die 64 are made different, a single yarn having a circular cross section is supplied from the spinning hole 65a having the discharge hole of a circular cross section. A single yarn having a square cross section can be spun from a spinning hole 65b having a discharge hole having a square cross section, and a single yarn having a triangular cross section can be spun from a spinning hole 65c having a discharge hole having a triangular cross section.
Moreover, it is possible to change the thickness of the single yarn in each cross section.

In the above configuration, if the polymer distributing member and the base 64 are made rotatable relative to each other, it is possible to freely change the amount of the polymer flowing into the spinning hole of each sectional shape by the relative rotation. it can.

The arrangement of the spinning holes of each shape in the die can be freely set. For example, as shown in FIG. 12, a spinneret 73 in which spinning holes 71 having a circular cross section and spinning holes 72 having a triangular cross section can be substantially arranged at random. Alternatively, as shown in FIG. 13, a spinning hole 8 for forming a hollow fiber is formed at the center.
1. A spinneret 84 in which a spinning hole 82 having a square cross section and a spinning hole 83 having a triangular cross section are arranged around the spinning hole 82. In this manner, the spinning holes for spinning a single yarn having a circular cross section, and the spinning holes for spinning a single yarn for forming a triangle, a quadrangle, a polygon, and a hollow fiber can be freely arranged. With regard to the above, the polymer inflow amount can be regulated by the polymer distribution member.

In the present invention, the fitting and fixing structure of the base plate and the base, or the fitting and fixing structure in the case where the polymer distributing member and the base are arranged so as to be in direct contact with each other, are constituted as shown in FIG. 14, for example. Is preferred. In FIG. 14, a cap upper plate 92 provided on the upper surface side of the cap 91 has a structure in which the outer peripheral portion is fitted. That is, the outer peripheral step 92a of the upper base plate 92 is fitted into the outer peripheral flange 91a of the base 91.

According to this structure, the base plate 92 can be easily detached from the base 91 by cooling and slightly contracting the base. Further, since substantially no thermal load is required to be applied to the base 91 at the time of attachment / detachment, even if, for example, the spinning hole is formed of a ceramic nozzle tip and the base of the base is made of metal, the thermal expansion difference (or thermal Excessive stress due to shrinkage difference) can be prevented.

FIG. 15 shows a melt spinning apparatus according to still another embodiment of the present invention. In the present embodiment, the base 101 has a divided structure of the upper base 102 and the lower base 103 in the polymer flow direction.
It is configured substantially as a polymer distribution member as referred to in the present invention. The upper base 102 and the lower base 103 are fitted to each other at a fitting portion 104 and are integrally assembled. In this embodiment, a plurality of mounting holes 105 are formed in the upper base 102, and a nozzle chip 107 (for example, a ceramic nozzle chip) having a polymer flow path 106 is mounted and fixed in each of the mounting holes 105. ing. In this embodiment, the lower base 103 has a plurality of mounting holes 10.
A nozzle tip 110 (for example, a ceramic nozzle tip) having a spinning hole 109 is mounted and fixed in each mounting hole 108.

Each nozzle tip 107 and each nozzle tip 1
10 corresponds one-to-one, and each polymer channel 106 and each spinning hole 109 correspond one-to-one. Each polymer channel 1
Numeral 06 has a flow path cross-sectional area smaller than the flow path cross-sectional area at the entrance of the corresponding spinning hole 109, and has a higher resistance than the spinning hole 109 as an individual polymer flow path 106.

That is, in this embodiment, each nozzle tip 107, particularly its polymer channel 106, regulates the amount of polymer flowing into the corresponding spinning hole 109, and
It has a function of measuring, and each nozzle tip 110, especially the spinning hole 109, especially the discharge port at the tip of the spinning hole 109 has a function of determining the cross-sectional shape of each single yarn to be spun, Substantially completely functionally separated.

Also in such an embodiment, it becomes possible to control the desired amount of polymer flowing into each of the spinning holes 109, and to make each single yarn spun from each of the spinning holes 109 uniform. In addition, it is possible to make the intentional difference very easily. Moreover, each spinning hole 109
Is controlled dominantly by the polymer flow path 106 in the upper base 102 on the upstream side.
Not so high processing accuracy is required for each spinning hole 109 of the lower die 103 due to the regulation of the polymer flow rate. The processing on the side of the polymer flow path 106 may simply be processing of a hole having a circular or square cross section, and high processing accuracy is not required for each of the spinning holes 109. Therefore, the manufacturing cost of the entire die 101 is significantly reduced. The cost of the entire spinning device is greatly reduced.

In this embodiment, a filter can be provided on the upstream side of the base in the same manner as shown in FIGS.

The melt spinning apparatus according to the present invention has a function separating structure of a polymer distribution member (upper die) for regulating the polymer flow rate and a spinning hole for regulating the cross-sectional shape of each single yarn. These parts in the device can be made smaller than conventional devices. Therefore, when an existing housing is used as the housing of the melt-spinning apparatus, an extra space is created in the housing, and even in the case of a new design, it is easy to secure the space in the housing. As a result, it is possible to employ a filter provided on the upstream side, which has been conventionally difficult to install.

For example, it is possible to employ a disk filter as a filter provided in the housing. If the disk filter is employed, high-precision filtration and a gel crushing function which cannot be obtained with the conventional apparatus can be provided. It is also possible to have

For example, as shown in FIG. 16, a polymer flow path
Is disposed, and a filter 116 made of a sintered body for crushing or trapping gel is disposed thereon, and a plurality of disk filters 117 are disposed upstream thereof. Can be adopted. The filter 116 may be omitted, and the disk filter 117 itself may have a gel crushing or gel capturing function. In the present embodiment, a plurality of disk filters 117 are stacked around a support 119 having a flange 118, and are fastened from above by a fastening nut 120 via a flange 121. The polymer is supplied from above through the columns 119, flows into the disk filter 117, and is filtered by the disk filter 117.
It flows out of the part into the housing 111. Flange 1
If the holes 18 and 121 have a porous structure (for example, a structure having a through hole 123 as shown),
3, the polymer after filtration can flow out into the housing 111, so that the polymer flows out into the housing 111 more easily and smoothly.
It is possible to prevent a dead space or the like in which the polymer stays in 1 from occurring. The filtered polymer flows into the polymer distribution member 113 from inside the housing 111 through the filter 116.

As described above, the adoption and installation of the disc filter 117, which is difficult to adopt in the conventional apparatus, becomes possible in the space of the housing.

Further, in a melt spinning apparatus having the above-described two-staged spinneret structure, a structure as shown in FIGS. In the structure shown in FIGS. 17 and 18, an annular space 134 is formed between the mounting hole 133 of the lower die 132 of the die 131 and the upper outer periphery of the nozzle tip 110 having the spinning hole 109, as compared with the structure shown in FIG. , Communication passage 1 in which annular spaces 134 are appropriately arranged
35. In this communication passage 135,
The heat medium inlet and / or outlet passage 136 communicates with the heat medium, and the heat medium flows along the communication passage 135 and the annular space 1 along the path.
34 is circulated. Therefore, the communication passage 135 constitutes a heat medium passage referred to in the present invention. By allowing the heat medium to pass through such a heat medium passage, it becomes possible to equalize the temperature of the polymer that passes through the nozzle tip 110 and, consequently, the spinning hole 109. Therefore, for example, even when the polymer generates heat due to high resistance in the polymer flow path on the upstream side, the temperature of the polymer discharged from the spinning hole 109 is controlled to a desired temperature by the flow of the heat medium. In addition, it is possible to make the temperature uniform.
The arrangement of the communication passages 135 may be appropriately arranged vertically and horizontally as exemplified in FIG. Other configurations, operations, and effects conform to the embodiment shown in FIG.

[0068]

As described above, according to the melt spinning apparatus of the present invention, a polymer distribution member having polymer flow paths separated from each other is provided, and the amount of polymer flowing into each spinning hole of the die is controlled. Since the individual spinning holes can be regulated, it can be set substantially freely, even if the yarn has a uniform thickness or a yarn whose thickness is intentionally changed. Can be simultaneously spun from the base. Therefore, it is possible to easily produce a multifilament obtained by arbitrarily combining single yarns having virtually any shape and thickness.

Further, since the polymer flow rate for each single yarn can be controlled by the polymer distribution member, the required processing accuracy for each spinning hole of the spinneret can be greatly relaxed, and the cost of the entire melt spinning apparatus can be greatly reduced. Can be.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a melt spinning apparatus according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a melt spinning apparatus according to another embodiment of the present invention.

FIG. 3 is a partial longitudinal sectional view of a melt spinning apparatus according to still another embodiment of the present invention.

FIG. 4 is a schematic side view when the thickness of the polymer distribution member is changed.

FIG. 5 is a partial longitudinal sectional view of a melt spinning apparatus according to still another embodiment of the present invention.

FIG. 6 is a partial longitudinal sectional view of a melt spinning apparatus according to still another embodiment of the present invention.

FIG. 7 is a partial plan view showing an example of a partition member in the apparatus of FIG.

FIG. 8 is a partial plan view showing another example of the partition member in the apparatus shown in FIG. 6;

FIG. 9 is a partial plan view showing an example of a combination of a partition member and a communication passage of a base plate in the apparatus of FIG. 6;

FIG. 10 is a plan view showing another example of the partition member.

FIG. 11 is a schematic plan view showing an example of a base.

FIG. 12 is a schematic plan view showing another example of the base.

FIG. 13 is a schematic plan view showing still another example of the base.

FIG. 14 is an exploded perspective view showing an example of a fitting and fixing structure of the base and the base plate.

FIG. 15 is a partial longitudinal sectional view of a melt spinning apparatus according to still another embodiment of the present invention.

FIG. 16 is a longitudinal sectional view of a melt spinning apparatus according to still another embodiment of the present invention.

FIG. 17 is a longitudinal sectional view of a melt spinning apparatus according to still another embodiment of the present invention.

18 is an enlarged partial perspective view of the device of FIG.

[Explanation of symbols]

1, 11, 30, 45, 63, 64, 73, 84, 9
1,115 base 2,14,29,46,60,65a, 65b, 65
c, 71, 72, 81, 82, 83, 109, 114
Spinning holes 3, 12, 21, 43, 51, 113 polymer distribution members 4, 13, 24, 44, 54, 106, 112 polymer flow paths 5, 23, 53 partition walls 6 discharge holes 15, 26, 42, 58; 58a, 58b, 58c Communication passages 16, 27, 41, 59, 92 Upper base plate 17, 31, 62, 108 Mounting holes 18, 28, 61, 110 Nozzle tips 19, 32, 33, 64, 65 Seal ring (seal) 22, 116 Filter 25 Center 34 Fitting structure 52 Partition member 55 Honeycomb plate 56, 62a, 62b, 62c Circular hole 57, 61 Perforated plate 63a, 63b, 63c Area 91a Outer flange 92a Outer step 101, 131 Base 102 Upper base 103, 132 Lower base 104 Fitting part 105, 133 Mounting hole 107 Nozzle tip 111 Housing Group 117 Disc filter 118, 121 Flange 119 Support 120 Tightening nut 122 Spacer 134 Annular space 135 Communication passage (Heat medium passage) 136 Heat medium inlet and / or outlet passage

Claims (30)

[Claims] 1. An upstream side of a spinneret having a plurality of spinning holes,
A melt spinning apparatus, comprising: a polymer distribution member provided with a polymer flow path that regulates the amount of polymer flowing into each of the spinning holes corresponding to each of the spinning holes. 2. Each polymer flow path of the polymer distribution member has a flow path resistance greater than a flow resistance of a corresponding spinning hole.
The melt spinning device according to claim 1. 3. Each of the polymer channels of the polymer distribution member has a channel resistance of at least twice the channel resistance of the corresponding spinning hole.
The melt spinning device according to claim 2. 4. The melt spinning apparatus according to claim 1, wherein the polymer distribution member is made of a porous material, and each of the polymer channels is formed in the porous material. 5. The melt spinning apparatus according to claim 4, wherein the porous material is made of a sintered body. 6. The melt-spinning apparatus according to claim 5, wherein the sintered body comprises a sintered body of a metal powder. 7. The melt-spinning apparatus according to claim 1, wherein the polymer distribution member is made of a wire mesh, and each polymer flow path is formed in the wire mesh. 8. The melt spinning apparatus according to claim 1, wherein each polymer channel has a gel crushing or gel capturing function. 9. The polymer distribution member according to claim 1, wherein each of the polymer flow passages of the polymer distribution member is separated from each other by a partition member embedded in the polymer distribution member or forming the polymer distribution member itself. A melt spinning apparatus according to any one of the above. 10. The polymer distribution member according to claim 4, wherein each of the polymer flow paths of the polymer distribution member is substantially separated from each other by partially compressing a porous material or a wire mesh constituting the polymer distribution member. The melt spinning device according to any one of the above. 11. The melt spinning apparatus according to claim 1, wherein the polymer distribution member is arranged so as to be in contact with the die. 12. A base plate having a communication path between each polymer flow path of the polymer distribution member and a corresponding spinning hole of the base is interposed between the polymer distribution member and the base. The melt-spinning apparatus according to any one of claims 10 to 13. 13. The melt-spinning apparatus according to claim 12, wherein the amount of the polymer flowing into the spinning hole of the corresponding die is regulated by the cooperation of each polymer flow path of the polymer distribution member and the communication path of the die upper plate. . 14. The melt-spinning according to claim 1, wherein each of the polymer flow paths of the polymer distribution member is formed so that the resistance of the polymer flow path closer to the center of the polymer distribution member becomes higher. apparatus. 15. The melt-spinning apparatus according to claim 14, wherein a change in resistance of each polymer flow path of the polymer distribution member is provided by a change in thickness of the polymer distribution member. 16. The melt-spinning apparatus according to claim 14, wherein a change in resistance of each polymer flow path of the polymer distribution member is given by a change in density of the polymer distribution member. 17. The melt spinning apparatus according to claim 1, wherein the amount of polymer flowing into each spinning hole is regulated to a substantially uniform amount by each polymer flow path of the polymer distribution member. . 18. The melt spinning apparatus according to claim 1, wherein the amount of polymer flowing into each spinning hole is regulated to two or more types of inflows by each polymer flow channel of the polymer distribution member. 19. The apparatus according to claim 1, wherein the polymer distribution member and the base are configured to be relatively rotatable about a central axis.
The melt spinning device according to any one of the above. 20. The melt spinning apparatus according to claim 19, wherein the amount of polymer flowing into each spinning hole is variable by relative rotation between the polymer distribution member and the die. 21. The melt-spinning apparatus according to claim 1, wherein a filter having higher filtration accuracy than the polymer distribution member is disposed upstream of the polymer distribution member. 22. A filter comprising a sintered metal fiber,
The melt spinning device according to claim 21. 23. A spinneret having a split structure of an upper spinneret and a lower spinneret in a polymer flow direction, having a spinning hole for determining a cross-sectional shape of each yarn from which the lower spinneret is spun, and wherein the upper spinneret is substantially 4. The method according to claim 1, wherein the upper die has a polymer flow path for regulating the amount of polymer flowing into each of the spinning holes corresponding to each of the spinning holes. The melt spinning apparatus according to claim 1. 24. The melt-spinning apparatus according to claim 23, wherein each polymer channel formed in the upper die has a channel cross-sectional area smaller than an entrance of each corresponding spinning hole. 25. The melt spinning apparatus according to claim 23, wherein each polymer flow path is formed by a nozzle tip mounted in each mounting hole formed in the upper die. 26. The melt-spinning apparatus according to claim 23, wherein a filter is arranged upstream of the upper die. 27. The melt-spinning apparatus according to claim 1, wherein a disk filter housed in a housing of the melt-spinning apparatus is provided upstream of the spinneret. 28. The melt-spinning apparatus according to claim 1, wherein each spinning hole is formed by a nozzle tip attached to each mounting hole formed in the die. 29. Each of the spinning holes is formed by a nozzle tip attached to each mounting hole formed in the lower die, and an annular space is formed around the upper portion of the nozzle tip with the lower die. 27. The melt-spinning apparatus according to claim 23, wherein the annular spaces are communicated with each other by a heat medium passage. 30. The melt spinning apparatus according to claim 1, wherein the ratio L / D of the length and the diameter of the polymer flow path is 5 or more.