KR100607551B1 - Melt spinning device - Google Patents

Abstract

Provides a melt spinning value for spinning a multifilament yarn having excellent uniformity without thickness variation.

A plurality of radiation packs 2 are mounted to the pack housing 33 internally installed in the radiation beam 1 so that the radiation packs 2 are arranged in a row, and a unitary cooling air supply common to the plurality of radiation packs 2 is provided below. In the melt spinning apparatus provided with the box 15 and the thread-cooling cylinder 44 which consists of cylindrical filters 8 and 9 in correspondence with each said spinning pack in the inside of this cooling wind supply box 15, The upper and lower portions of the thread cooling tube 44 are sealed with the first sealing mechanisms 21 and 22 with respect to the upper plate and the lower plate of the cooling wind supply box 15, and the upper portion of the thread cooling tube 44 is also sealed. The lower surface of the pack housing 33 is sealed by the second sealing mechanism 20 via the spacers 5 and 35.

Description

Melt Spinning Equipment {MELT SPINNING DEVICE}

1 is a schematic cross-sectional view showing an embodiment of the melt spinning apparatus of the present invention.

FIG. 2 is an enlarged view of a portion indicated by arrow P in FIG. 1.

FIG. 3 is a top view showing partly broken view as seen from X-X ray in FIG. 1. FIG.

4 is a top view corresponding to FIG. 3 according to another embodiment of the present invention.

Fig. 5 is a schematic perspective view of the yarn cooling cylinder in the melt spinning apparatus of the present invention.

6 is a schematic diagram illustrating a porous plate used in a cooling wind supply path of a melt spinning apparatus of the present invention.

It is a schematic sectional drawing which shows the principal part of other embodiment of this invention.

8 is a schematic cross-sectional view showing the main parts of still another embodiment of the present invention.

It is a schematic sectional drawing which shows the principal part of further another embodiment of this invention.

TECHNICAL FIELD The present invention relates to a melt spinning apparatus, and more particularly, to a melt spinning apparatus for enabling microfine multifilament yarns to be spinable as yarns of excellent uniformity without thickness variation.

In general, melt spinning of a thermoplastic polymer is supplied to a spinning pack with a molten polymer melted by an extruder, discharged as a multifilament from the spinneret of the spinning pack, and a cooling wind is blown onto it to solidify the yarn. However, the greater the number of multifilaments being released, the more difficult it is to cool each filament uniformly in the longitudinal direction and to each other, resulting in a cooling deviation, or the filaments contacting each other under a spinneret or having a thickness variation. There is a problem.

Particularly, when the single yarn fineness is 0.55 dtex or less and 0.33 dtex or less, the microfilament becomes more susceptible to internal deformation in each filament, and more susceptible to the influence of the accompanying airflow and cooling wind, which tends to cause variation in thickness. do. In addition, since the number of filaments constituting the multifilament is increased by 2 to 5 times larger than that of general fiber yarns due to the fineness of single yarn fineness, the above tendency is more likely to occur.

Conventionally, as a uniform cooling method of the melt-emitting multifilament, it is known that a cylindrical spinning cooling cylinder is disposed below the spinning pack and that the cooling air blown from the upper part of the spinning cooling cylinder flows in parallel to the filament (for example, , Patent Document 1). As described in Patent Literature 2, in the case of cooling in the cooling spinning cylinder as described above, the upper end of the spinning cooling cylinder is sealed with a packing for the spinning pack, and the cooling air of the spinning cooling tub is not introduced to the adjacent spinning pack. It can be seen that the action is made more uniform, and particularly effective when melt spinning the ultrafine multifilament.

However, as in Patent Literature 2, in the configuration in which the upper end portion of the spinning cooling cylinder is sealed by directly contacting the spinning pack, there is a problem that it is difficult to completely seal for the following reasons. Therefore, external cooling wind flows into the radial cooling cylinder from the incomplete sealing point, and the airflow of the cooling wind may be disturbed, and there is a problem that a uniform cooling action is not necessarily obtained for each filament.

That is, since the radiation pack is assembled with a plurality of parts, the lower position when the radiation pack is mounted due to manufacturing error of these parts and a difference in the amount of crushing during assembly and installation of the sealing element attached to the radiation pack. It is inevitable that a difference occurs in each weight, and it is difficult to match all of them on the same plane. Therefore, the sealing part of the upper end part of a radiation cooling cylinder becomes incomplete, or the cooling wind of the adjacent radiation cooling cylinder flows in and becomes a cause of a cooling deviation. In particular, in the configuration of the cooling unit, the integrated cooling wind supply box is provided so as to span a plurality of radiation packs, and the thread-cooling box is installed inside the cooling wind supply box so as to correspond to each spinning pack. It is easy to occur.

[Patent Document 1] International Publication WO99 / 067450A

[Patent Document 2] International Publication WO01 / 79594A

An object of the present invention is to provide a melt spinning value capable of spinning a multifilament yarn having excellent uniformity without variation in thickness.

Another object of the present invention is to provide a melt spinning value which enables melt spinning of an ultrafine multifilament yarn having excellent uniformity between filaments and in the longitudinal direction, even in the case of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less.

The molten spinning device of the present invention, which achieves the above object, is mounted in a pack housing installed inside the radiation beam so as to thermally arrange a plurality of radiation packs, and is common to the plurality of radiation packs below. In the melt spinning apparatus provided with an integrated cooling wind supply box, and a thread-cooling cylinder made of a cylindrical filter so as to correspond to each of the spinning packs inside the cooling wind supply box, the upper and lower portions of the yarn cooling cylinder are The upper plate and the lower plate of the cooling wind supply box are respectively sealed with a first sealing mechanism, and the upper part of the thread-cooling cylinder is sealed by a second sealing mechanism via a spacer with respect to a lower surface of the pack housing. It is done.

Thus, after sealing the upper part and the lower part of the threaded cooling cylinder of each weight with the 1st sealing mechanism with respect to the upper board and the lower board of an integrated cooling wind supply box, the upper part of a threaded cooling cylinder is again sealed with respect to the lower surface of a pack housing. Since it is sealed by the mechanism, only the stable cooling wind which passed through the thread thread cooling cylinder can be made to flow, and a discharge multifilament can be cooled uniformly. In addition, since the upper part of the threaded cooling cylinder is not sealed to the spin pack but to the bottom of the pack housing by the second sealing mechanism, a sealing leak occurs even when the installation height of the spin pack changes due to a pack change or the like. The discharged multifilament can be cooled uniformly without fail.

The thermoplastic polymer applied to the melt spinning apparatus of the present invention is not particularly limited as long as it is a fiber-forming one, and any thermoplastic polymer can be used. For example, thermoplastic polymers, such as polyamide, polyester, and polyolefin, are mentioned.

In addition, although the melt spinning value of the present invention can radiate yarn having excellent uniformity irrespective of the single yarn fineness of the discharge yarn, the single yarn fineness is particularly effective for melt spinning of yarns of 0.55 dtex or less and 0.33 dtex or less. . In addition, the single yarn fineness is low in this way, and the filament yarn has an excellent effect on the melt spinning of an ultrafine multifilament yarn having 90 or more filaments.

EMBODIMENT OF THE INVENTION Hereinafter, the melt spinning apparatus of this invention is described in detail with reference to the specific embodiment shown in drawing.

BRIEF DESCRIPTION OF THE DRAWINGS The melt spinning value of embodiment of this invention is shown, FIG. 2 is an enlarged view of the location shown by the arrow P in FIG. 1, and FIG. 3 shows the cross section seen by the X-X line in FIG.

1 to 3, the pack housing 33 is installed inside the upper radiation beam 1, and the plurality of radiation packs 2 are arranged in the pack housing 33 in a direction orthogonal to the ground. It is stored. The spinneret 3 is assembled with each spin pack 2, and the spinneret 3 exposes a lower surface thereof. The pack housing 33 may be formed for each spinning pack, or may be an integral type having a plurality of mounting holes so as to mount a plurality of spinning packs.

The thread cooling device 6 in which cooling air is injected to the thread Y at a position 20 to 50 mm below the lower surface of the spinneret 3 below the spin pack 2 mounted on the pack housing 33 as described above. ) Is installed. The thread cooling device 6 independently has a thread cooling tank 44 for each spinning pack that surrounds the thread Y discharged from the spinneret 3 of the spinning pack 2, and the thread cooling tank It is configured to mount 44 in the cooling wind supply box 15. The outer side cooling air supply box 15 is integrally formed so as to be common to the plurality of spin packs 2, and therein is internally provided with the thread-cooling cylinder 44 provided for each spin pack 2 independently. (See Figure 3). As shown in FIG. 5, the thread cooling tube 44 is constituted by cylindrical filters 8, 9 having internal and external dual structures.

In the thread cooling device (6), between the upper plate (6b) of the cooling air supply device (15) and the lower surface of the pack housing (33), an insulating member (24) made of a heat insulating material is formed so as to surround the mounting hole of the spinning pack (2). The heat insulating member 24 keeps the lower surface of the spinneret 3 at a temperature suitable for melt spinning. In addition, the protective cover 12 of the yarn Y is detachably connected to the lower side of the yarn cooling cylinder 44 in the cooling wind supply box 15, and a lubrication device ( 11) is provided, and the oil agent is provided to the yarns Y cooled by the cooling wind in the yarns cooling cylinder 44. Further, downstream of the oil supply device 11, a winding device is provided via a transfer roller, not shown.

Further, in the thread cooling device 6, packings 21 and 22 are respectively inserted into the thread cooling tube 44 of each weight as upper and lower portions as first sealing mechanisms, so that the cooling air supply box 15 It is sealed about the upper board 6b and the lower board 6c. By the sealing of the said 1st sealing mechanism, cooling winds other than having passed through the cylindrical filters 8 and 9 of the thread cooling cylinder 44 are not prevented from flowing into the dead road 27.

Moreover, the sealing plate 5 is overlapped through the packing 39 as a spacer on the upper surface of the upper plate 6b of the cooling wind supply box 15. The sealing plate 5 overlaps a part of the packing 21 on the upper part of the thread cooling tube 44, and the upper surface of the sealing plate 5 is the pack housing by the second sealing mechanism with the packing 20 as the second sealing mechanism. It is sealed about the lower surface of (33). By the sealing of such a 2nd sealing mechanism, the cooling wind does not flow in from the outside to the slope from the upper part of the thread cooling tube 44 to the lower surface of the pack housing 33, and passes through the thread thread cooling cylinder 44 of the downstream ( Y) do not disturb. In addition, since the upper part of the threaded cooling cylinder 44 is not sealed with respect to the spinning pack 2 but with respect to the lower surface of the pack housing 33, even if the installation height of the spinning pack 2 changes by pack replacement etc. The sealing leak does not occur between the upper part of the thread cooling tube 44 and the lower surface of the pack housing 33.

The sealing plate 5 inserted as the spacer as described above serves to optimize the distance from the lower surface of the spinneret 3 to the start position of the cooling wind jet of the yarn cooling cylinder 44 by changing its thickness. . Although the distance from the lower surface of the spinneret 3 to the starting position of the cooling wind injection of the yarn cooling cylinder 44 is not specifically limited, Preferably, it is good to select according to single yarn fineness, In the case of microfiber spinning of single yarn fineness 0.55 dtex or less The range of 20-50 mm, More preferably, the range of 30-40 mm is good.

The thread cooling device 6 shown in the drawing is provided with the lifting device 13 of the hydraulic cylinder on the rear surface of the protective cover 12. This lifting device 13 lifts the thread cooling device 6 through the protective cover 12, and replaces the spinning pack 2 by lowering the thread cooling device 6, or spinnerets 3 It is possible to clean the surface. In addition, the thread cooling device 6 can be lifted in units of a plurality of spin packs 2. In addition, the airtight sealability of the yarn cooling device 6 is further improved.

The cooling wind supply box 15 of the thread cooling device 6 is connected to the cooling wind supply duct 26 through the duct 32. The porous body 7 as shown in FIG. 6 is assembled in the connection part between this duct 26 and the duct 32, and this porous body 7 equalizes the air volume of a cooling wind, and a static pressure, and cools. Cooling wind is uniformly distributed to the thread-cooling cylinder 44 of each weight in the air supply box 15 (see FIG. 3). The opening ratio of the porous body 7 is preferably 30 to 50%, and as a constituent material, materials having permeation resistance properties such as porous plates such as corrosion-resistant metals and plastics, wire mesh, and nonwoven fabrics can be used alone or in combination.

In the cooling air supply duct 26, the air volume adjusting device 14 and the expansion and contraction joint 17 are assembled, and the air volume adjusting device 14 adjusts the air volume to the thread cooling device 6 appropriately. The joint 17 prevents the lifting and lowering operation of the thread cooling device 6 by the lifting device 13.

The arrangement of the plurality of weights of the cylinder cooling cylinders 44 in the integrated cooling wind supply box 15 which is arranged to span the plurality of radiation packs 2 in the thread cooling device 6 is as shown in FIG. 3. Similarly, the arrangement of the radiation pack 2 (radiation detention 3) with respect to the radiation beam 1 is arranged in a zigzag arrangement, as shown in FIG. You may make it into. By the zigzag arrangement, the melt spinning apparatus can be made compact.

The number of thread thread cooling cylinders 44 with respect to the integrated cooling wind supply box 15 can be arbitrarily set, for example, 4,6,8,10,12,14,16. The inner and outer cylindrical filters 8 and 9 constituting the yarn cooling cylinder 44 form the outer cylindrical filter 9 by a porous plate having a porosity of 5 to 8%, and have an inner cylindrical filter 8. ) May be composed of a microporous filter having a lower porosity. In addition, it is preferable to set the length of the cylindrical filter 8 and 9 which comprises the thread cooling cylinder 44 so that the cooling air blow-out length at the time of assembling to the cooling wind supply box 15 may be in the range of 80-100 mm. Do.

Thus, when the thread loss cooling cylinder 44 comprised by the dual structure sets the pressure loss of the thread cooling cylinder to (DELTA) P (kPa), and the cooling wind flow volume per unit area to Q (ℓ / min / cm <2>), the passage resistance ((triangle | delta)) P / Q) is preferably set to be in the range of 0.02 to 0.06. In addition, in order to satisfy the passage resistance, a wire mesh or a nonwoven fabric may be sandwiched between the internal and external cylindrical filters. If the passing resistance (ΔP / Q) is lower than 0.02, the static pressure and cooling air flow in each of the yarn cooling cylinders 44 and each of the yarn cooling cylinders of each weight become uneven, and it is preferable to cool the yarns uniformly. Becomes difficult. In addition, when the passage resistance? P / Q is higher than 0.06, the pressure loss in the thread cooling tube 44 becomes large, so that the amount of air blown toward the inside of the thread cooling tube 44 is insufficient. It is difficult to perform uniform cooling. If the amount of cooling air blown into the thread cooling vessel 44 in a state where the pressure loss is large is sufficient, the process cost becomes high, which is economically disadvantageous.

7 shows the main parts of another embodiment of the melt spinning apparatus of the present invention.

Similarly to the embodiment of Figs. 1 and 2, although the configuration in which the sealing plate 5 is superimposed on the packing 21 on the upper part of the thread cooling tube 44, and the packing 20 is superimposed on the upper surface thereof is the same, the packing Instead of adhering the 20 directly to the lower surface of the pack housing 33, the sealing portion 35a of the sealing ring 35 is sealed through the sealing ring 35 having the downward annular projection 35a. The point of digging into the surface of 20) makes it firmly sealed. The sealing ring 35 also serves as a spacer. The sealing ring 35 is formed on the lower surface of the pack housing 33 so as to surround the mounting hole of the radiation pack 2, and is detachably screwed to the lower surface of the pack housing 33. The operation of digging the projection 35a into the surface of the packing 20 can be performed by raising the protective cover 12 by the elevating device 13.

Fig. 8 shows the main parts of still another embodiment of the melt reflection apparatus of the present invention.

8, the sealing ring 35 which has the downward annular projection part 35a similarly to the case of FIG. 7 is provided so that detachable screwing may be possible with respect to the lower surface of the pack housing 33. As shown in FIG. The sealing ring 35 serves as a spacer. In addition, in FIG. 7, the sealing plate 5 which overlapped with the packing 21 in the upper part of the thread | pipe cooling cylinder 44 in FIG. 7 is substituted by the annular port 37, and the liquid in the said port 37 is carried out. The metal 43 is filled as a sealing material. In addition, sealing is performed by immersing the annular projection 35a of the sealing ring 35 in the liquid metal 43. As the liquid metal, low-temperature solders, fuses, low-melting metals used for fire hydrants, high pressure gas storage safety valves, dental materials, chemical film types and the like can be used.

In the case of the present embodiment as well, the ring cover 35a of the sealing ring 35 can be immersed in the liquid metal 43 by raising the protective cover 12 by the elevating device 13.

Fig. 9 shows the main parts of still another embodiment of the melt spinning apparatus of the present invention.

In the embodiment of FIG. 9, the lower portion of the radiation pack 2 is mounted to protrude downward from the lower surface of the pack housing 33. Thus, since the lower part of the radiation pack 2 protrudes downward, the heating heater 4 is set around the said projection part, and the surface temperature of the spinneret 3 is set to predetermined temperature (within radiation temperature -10 degreeC). To be maintained. The heating heater 4 is fixed to the lower surface of the pack housing 33 via the heat insulation packing 19, and the same packing 20 as the embodiment of FIGS. 1 and 2 is attached to the lower surface of the heating heater 4. The sealing ring 5 is in contact.

EXAMPLE

Using the melt spinning values shown in Figs. 1 and 2, melt spinning was carried out while the polyethylene terephthalate was taken over at a feed rate of 2800 m / min to obtain a partially oriented unoriented yarn made of an ultrafine multifilament of 82 dtex-177f.

The obtained undrawn yarn was measured by Worcester yarn deviation manufactured by Juelbega, and the Worcester deviation U (%) was measured under general conditions, and the result was 0.7%. In addition, the Worcester deviation U (%) measured on semi-active condition was 0.3%. None of the measurements were very small and uniform.

In addition, as a result of co-stretching and twisting the partially oriented unstretched yarn, the obtained twisted yarn had no dyeing variation and the touch was good.

As described in detail above, according to the melt spinning apparatus of the present invention, after the upper and lower portions of the threaded cooling cylinders of each weight are sealed with the first sealing mechanism to the upper plate and the lower plate of the integrated cooling wind supply box, the yarn spinning is again performed. Since the upper part of the cylinder is sealed with respect to the lower surface of a pack housing by a 2nd sealing mechanism, only the stable cooling wind which passed through the thread-cooling cylinder can be made to flow, and a discharge multifilament can be cooled uniformly. In addition, since the upper part of the yarn cooling cylinder is sealed by the second sealing mechanism to the lower surface of the pack housing and not to the spinning pack, a sealing leak occurs even when the mounting height of the spinning pack is changed due to a pack replacement or the like. The discharged multifilament can be cooled uniformly without fail.

Claims (15)

In the pack housing installed inside the radiation beam, a plurality of radiation packs are mounted in a row, and an integrated cooling air supply box common to the radiation packs of the plurality of weights is installed below the inner side of the cooling wind supply box. In the melt spinning apparatus provided with a yarn cooling cylinder made of a cylindrical filter to correspond to each of the spinning packs, The upper and lower portions of the yarn cooling cylinders are sealed with a first sealing mechanism for the upper plate and the lower plate of the cooling wind supply box, and the upper portion of the yarn cooling cylinders is interposed with a spacer with respect to the lower surface of the pack housing. Melt sealing device by a second sealing mechanism. The melt spinning apparatus according to claim 1, wherein the thermal arrangement of the spinning pack is in a zigzag arrangement. The melt spinning apparatus according to claim 1, wherein the cylindrical filter is composed of at least one of a porous plate, a wire mesh, a nonwoven fabric, and a porous material. 4. The pass resistance (ΔP / Q) in the range of 0.02 to 0.06 according to claim 3, wherein the pressure loss of the yarn cooling cylinder is ΔP (kPa) and the cooling wind flow rate per unit area is Q (l / min / cm 2). Melt spinning apparatus characterized in that set to. The said 2nd sealing mechanism consists of a sealing ring which formed the downward annular projection part, and ring-shaped packing, Comprising: The said 2nd sealing mechanism comprised so that the annular projection of the said sealing ring could be pressed to the said packing. Melt spinning apparatus characterized in that. The said 2nd sealing mechanism consists of the sealing ring which formed the downward annular projection part, and the ring-shaped port which filled the liquid metal, The annular projection part of the said sealing ring is a thing as described in any one of Claims 1-4. Melt spinning apparatus characterized in that configured to be immersed in the liquid metal. The melt spinning apparatus according to any one of claims 1 to 4, wherein an annular heat insulating member is disposed between the pack housing and the cooling spinning barrel. The melt spinning apparatus according to any one of claims 1 to 4, which is melt spinning of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less. The melt spinning apparatus according to claim 5, wherein an annular heat insulating member is disposed between the pack housing and the cooling spinning barrel. The melt spinning apparatus according to claim 6, wherein an annular heat insulating member is disposed between the pack housing and the cooling spinneret. The melt spinning apparatus according to claim 5, which is melt spinning of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less. The melt spinning apparatus according to claim 6, which is melt spinning of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less. The melt spinning apparatus according to claim 7, wherein the spinning machine is melt spinning of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less. 10. The melt spinning apparatus according to claim 9, which is melt spinning of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less. The melt spinning apparatus according to claim 10, which is melt spinning of an ultrafine multifilament yarn having a single yarn fineness of 0.55 dtex or less.

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