CN111826729A - Melt spinning apparatus - Google Patents
Melt spinning apparatus Download PDFInfo
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- CN111826729A CN111826729A CN202010206180.4A CN202010206180A CN111826729A CN 111826729 A CN111826729 A CN 111826729A CN 202010206180 A CN202010206180 A CN 202010206180A CN 111826729 A CN111826729 A CN 111826729A
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- gas
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D13/00—Complete machines for producing artificial threads
- D01D13/02—Elements of machines in combination
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The present invention relates to a melt spinning apparatus which suppresses turbulence of an air flow near a filament. A melt spinning device (1) is provided with: a spinning unit (2) for spinning filaments; a cooling unit (3) for cooling the filaments; and an exhaust unit (4) having an exhaust passage (30) for sucking and exhausting gas generated from the filaments. The exhaust unit (4) has: a suction part (31) having a gas suction port; a duct (32) disposed downstream of the suction unit (31) in the gas discharge direction; an aspirator (33) which is disposed on the downstream side of the duct (32) and sucks and discharges gas; a connection pipe (34) disposed downstream of the aspirator (33) and connected to the middle of a fixed pipe (100) fixedly provided; and an inflow suppressing unit (70) that suppresses the inflow of gas from the fixed pipe (100) to the connection pipe (34).
Description
Technical Field
The invention relates to a melt spinning device.
Background
The melt spinning device described in patent document 1 spins a molten polymer as filaments from a spinneret. The spun filaments are cooled by cooling air supplied through a cooling drum disposed below the spinneret. Here, gas of a monomer as a raw material of a polymer is generated from the spun-out filament. When the gas solidifies and adheres to a spinneret, a cooling cylinder, or the like, there is a possibility that the cooling air is disturbed to cause yarn vibration, which may cause problems such as deterioration in yarn quality, yarn breakage, and equipment failure.
Therefore, the melt spinning device is configured to be able to discharge the gas. Specifically, an annular suction member having a suction port formed in a wall surface is disposed between the spinneret and the cooling cylinder. In general, a melt spinning apparatus includes an exhaust device that generates a negative pressure to suck and discharge gas through a suction port. The gas sucked by the exhaust unit flows downstream in the direction in which the gas is discharged (gas discharge direction) through a connection pipe connected to the exhaust unit.
Patent document 1: DE102013012869A1
However, in a yarn production plant, a plurality of melt spinning devices each having an exhaust device are generally provided, and a single large melt spinning apparatus is configured. In general, a plurality of connection pipes connected to a plurality of exhaust devices are arranged so as to merge with a fixed pipe fixedly installed in a production plant. That is, the connection pipe is connected to the middle portion of the fixed pipe. In such a case, for example, if the gas flow is disturbed at the point of confluence between the fixed pipe and the connection pipe, a part of the gas may flow into the connection pipe (i.e., upstream in the gas discharge direction) from the fixed pipe. If the pressure in the space on the upstream side in the gas discharge direction fluctuates due to this, the air flow is disturbed in the vicinity of the spun yarn, and the yarn may be swung, thereby deteriorating the yarn quality.
Disclosure of Invention
The purpose of the present invention is to suppress turbulence of air flow near a filament.
The melt spinning apparatus according to claim 1 is characterized by comprising: a spinning unit having a spinning nozzle for spinning filaments; a cooling unit having a cooling cylinder disposed below the spinneret and cooling the filaments spun from the spinneret; and an exhaust unit disposed between the spinning unit and the cooling unit in a traveling direction of the filament, and having an exhaust passage formed therein for sucking and discharging gas generated from the filament, the exhaust unit including: a suction section disposed between the spinneret and the cooling cylinder, and having a suction port for sucking the gas; a duct portion disposed downstream of the suction portion in a gas discharge direction in which the gas is discharged; an exhaust device disposed on a downstream side of the duct portion in the gas discharge direction, for sucking and discharging the gas; a connection pipe connected to a middle portion of a fixed pipe fixedly provided, and disposed on a downstream side of the exhaust device in the gas discharge direction; and an inflow suppressing unit for suppressing the gas from flowing from the fixed pipe to the connection pipe.
In the present invention, the connection pipe is connected to the middle portion of the fixed pipe. In such a case, the gas flow is disturbed at the point of confluence between the fixed pipe and the connection pipe, and a part of the gas may flow back from the fixed pipe to the connection pipe. As a result, the yarn tends to sway easily due to turbulence of the air flow near the yarn on the upstream side in the gas discharge direction, and there is a possibility that the yarn quality deteriorates and yarn breakage occurs. In the present invention, the inflow suppressing portion can suppress inflow of gas from the fixed pipe to the connection pipe. Thus, turbulence of the air flow near the filaments can be suppressed.
The melt spinning apparatus according to claim 2 is characterized in that, in the above-described invention 1, the exhaust device is configured to be capable of changing an output, and has a gas inflow portion for allowing the gas to flow in, at least one of the gas inflow portion and the duct portion is formed with an external gas intake port for communicating the discharge flow path with a space outside the discharge flow path, and the inflow suppressing portion includes the exhaust device and the external gas intake port.
In the present invention, the output of the exhaust device is increased, whereby the flow rate of the gas flowing through the connection pipe can be increased, and the inflow of the gas from the fixed pipe to the connection pipe can be suppressed. However, when only the output of the exhaust device is increased, there are problems as follows: the negative pressure in the space on the upstream side in the gas discharge direction from the gas discharge device becomes stronger, and the discharge speed of the gas near the filament becomes excessively high, so that the gas flow near the filament is likely to be disturbed. Therefore, as a further measure, for example, it is conceivable to provide a valve between the suction unit and the exhaust unit in the gas discharge direction to increase the flow path resistance and to suppress the gas flow rate on the upstream side to be small. However, this method has the following problems: the gas discharge flow path is narrowed by the valve, and the flow path is easily blocked when the gas alone is solidified.
Therefore, in the present invention, the outside air intake port is further formed in at least one of the gas inflow portion and the duct portion. Accordingly, when the exhaust device is operated, the external air can be taken into the exhaust flow path through the external air intake port, and therefore the suction pressure (negative pressure) can be reduced by merging the gas flowing through the exhaust flow path with the external air. Therefore, the flow velocity of the gas flowing from the upstream side in the gas discharge direction from the outside air inlet port can be reduced as compared with the case where the outside air inlet port is not formed. Therefore, even when the output of the exhaust device is strong, the exhaust flow path of the gas is not narrowed, and the increase in the exhaust speed of the gas near the filament f can be suppressed, and the turbulence of the gas flow near the filament f can be suppressed.
The melt spinning apparatus according to claim 3 is characterized in that, in the above invention 2, the exhaust unit includes an adjusting portion for adjusting an opening degree of the outside air intake port.
In the present invention, when the flow rate of the outside air taken in through the outside air intake port is to be adjusted, the flow rate can be adjusted by adjusting the opening degree of the outside air intake port by the adjusting portion.
A melt spinning apparatus according to claim 4 is characterized in that, in the above invention 3, the adjusting portion has a cover portion for covering a part of the external air intake port, and the cover portion is movable along a plane including an edge of the external air intake port, whereby an area of the part covering the external air intake port can be changed.
In the present invention, the opening degree of the outside air intake port can be easily adjusted by a simple operation of moving the cover portion along the surface including the edge of the outside air intake port.
The melt spinning apparatus according to claim 5 is characterized in that the melt spinning apparatus according to claim 3 or 4 includes a plurality of the exhaust units.
In the configuration in which a plurality of exhaust units are provided (that is, a plurality of connection pipes are connected to a fixed pipe), the optimum flow rate of the outside air taken in through the outside air intake port may differ for each exhaust unit. In such a configuration, it is particularly effective to provide the adjusting portions in the respective exhaust units as in the present invention.
A melt spinning apparatus according to claim 6 is characterized in that, in any one of the inventions 3 to 5, the spinning unit includes a1 st spinning unit and a 2 nd spinning unit different from the 1 st spinning unit, the exhaust unit includes a1 st suction portion corresponding to the 1 st spinning unit and a 2 nd suction portion corresponding to the 2 nd spinning unit as the suction portions, a1 st duct portion corresponding to the 1 st suction portion and a 2 nd duct portion corresponding to the 2 nd suction portion as the duct portions, the exhaust device includes a1 st gas inflow portion corresponding to the 1 st duct portion and a 2 nd gas inflow portion corresponding to the 2 nd duct portion as the gas inflow portions, and a1 st external gas intake port corresponding to the 1 st duct portion and the 2 nd duct portion are formed as the external gas intake port A 2 nd outside air intake port corresponding to the 2 nd gas inflow portion, wherein the 1 st adjustment portion for adjusting the opening degree of the 1 st outside air intake port and the 2 nd adjustment portion for adjusting the opening degree of the 2 nd outside air intake port are provided as the adjustment portions.
In the configuration in which the 1 st gas inflow portion and the 2 nd gas inflow portion are provided to one exhaust device, there is a possibility that the optimal flow rate of the external gas taken in through the external gas intake port may be different for each gas inflow portion. In such a configuration, the case where the 1 st adjustment unit and the 2 nd adjustment unit are provided as in the present invention is particularly effective.
The melt spinning apparatus according to claim 7 is characterized in that, in any one of the inventions 2 to 6, the external air intake port is formed in the air inflow portion of the exhaust device.
If the outside air intake port through which the discharged gas and the outside air merge is disposed in the vicinity of the suction portion in the gas discharge direction, the gas flow tends to be disturbed in the vicinity of the suction port, and the filament may tend to sway. In the present invention, the external air intake port is formed in the gas inflow portion of the exhaust device and is disposed at a position distant from the suction portion. Therefore, the air flow can be prevented from being easily disturbed near the suction port, and the yarn can be prevented from being easily swung.
A melt spinning apparatus according to claim 8 is characterized in that, in any one of the inventions 1 to 7, the inflow suppressing portion includes a wind shielding member that is disposed on a downstream side in the gas discharge direction of the connection pipe and is provided so as to extend toward an inside of the fixed pipe, and prevents the gas in the fixed pipe from flowing into the connection pipe.
In the present invention, the wind blocking member disposed to extend toward the inside of the fixed pipe prevents the gas in the fixed pipe from flowing into the connection pipe. Therefore, the reverse flow of the gas can be suppressed without accompanying or together with the output change of the exhaust device.
A melt spinning apparatus according to claim 9 is characterized in that, in any one of the inventions 1 to 8, the gas is discharged from one side to the other side in an extending direction of the fixed pipe, and the wind shielding member extends in a direction orthogonal to the extending direction or is disposed to be inclined toward the other side in the extending direction with respect to the orthogonal direction.
In the configuration in which the wind blocking member is inclined to one side in the extending direction with respect to the orthogonal direction, there is a possibility that the gas having collided with the wind blocking member flows back to one side in the extending direction, and flows into the connecting pipe again toward the other side. In the present invention, the backflow of the gas that has collided with the windshield member toward one side in the extending direction can be suppressed. Therefore, inflow of gas from the fixed pipe to the connection pipe can be effectively suppressed.
A melt spinning apparatus according to claim 10 is the melt spinning apparatus according to any one of claims 1 to 9, wherein the suction unit includes: a suction ring disposed so as to surround the filaments spun from the spinneret, the suction ring having a peripheral wall in which the suction port is formed; and a surrounding member connected to the exhaust device, disposed so as to surround the suction ring, and having an internal space through which the gas discharged from the inside of the suction ring flows.
In the present invention, a substantially closed internal space is formed by the suction ring and the surrounding member. This allows the gas to be efficiently sucked into the internal space even if the negative pressure generated by the exhaust device is weak. Therefore, even if the negative pressure slightly fluctuates, the flow velocity of the gas may greatly fluctuate, and the filament may oscillate due to disturbance of the gas flow. In such a configuration, as in the present invention, the inflow suppressing portion can suppress backflow of gas from the fixed pipe to the connection pipe, which is particularly effective.
The melt spinning apparatus according to claim 11 is characterized in that, in any one of the inventions 1 to 10, the exhaust device is an aspirator including: a water inflow part which is provided separately from the gas inflow part and is used for water inflow; and an outflow unit connected to the connection pipe and configured to allow the gas and the water to flow out.
In a configuration in which an aspirator is applied as an exhaust device, a negative pressure is generated by a secondary flow accompanying the flow of water inside the aspirator, and gas is sucked. The aspirator has an advantage that a minute negative pressure can be generated by adjusting the flow rate of water, and an advantage that the monomer can be dissolved in water and discharged.
On the other hand, since water flows into the fixed pipe through the outflow portion and the connection pipe, a large amount of water may flow into the fixed pipe, and a strong accompanying flow may be generated. When such an accompanying flow flows in a reverse flow from the fixed pipe to the connection pipe, the negative pressure may greatly vary on the upstream side in the gas discharge direction. Therefore, in order to suppress the accompanying flow flowing from the fixed pipe to the connection pipe, it is necessary to increase the amount of water flowing to the aspirator, and to increase the accompanying flow flowing from the connection pipe to the fixed pipe. On the other hand, if the accompanying flow for sucking the gas becomes strong, the negative pressure may become too strong and the filament may largely oscillate. In such a configuration, the inflow suppressing portion can suppress backflow of gas from the fixed pipe to the connection pipe as in the present invention, which is particularly effective.
Drawings
Fig. 1 is a schematic view of a melt spinning apparatus according to the present embodiment.
FIG. 2 is an enlarged view of the spinning beam and its peripheral structure.
Fig. 3 is a sectional view taken along line III-III of fig. 2.
Fig. 4 is a plan view of the suction portion and its periphery.
Fig. 5 is a cross-sectional view taken along line V-V of fig. 4.
FIG. 6 is an explanatory view showing the configuration of the aspirator and its periphery.
Fig. 7 (a) and (b) are explanatory views showing a detailed configuration of the aspirator.
Fig. 8 (a) and (b) are explanatory views showing the adjustment member.
Fig. 9 (a) and (b) are explanatory views showing changes in the opening degree of the slit.
Fig. 10 is an explanatory diagram showing an airflow in the vicinity of the slit.
Fig. 11 is an explanatory diagram showing an exhaust unit according to a modification.
Fig. 12 is an explanatory view showing an exhaust unit according to another modification.
Description of the symbols
1: a melt spinning apparatus; 2: a spinning beam (spinning unit); 2 a: a spinning beam (1 st spinning unit); 2 b: a spinning beam (2 nd spinning unit); 3: a wire cooling device (cooling unit); 4: an exhaust unit; 13: spinning spinneret; 21: a cooling cylinder; 30: a discharge flow path; 31: a suction member (suction unit); 31 a: a suction member (1 st suction part); 31 b: a suction member (2 nd suction part); 32: a duct (duct portion); 32 a: a duct (1 st duct part); 32 b: a duct (2 nd duct portion); 33: an aspirator (exhaust device); 34: a connecting pipe; 41: an enclosing member; 42: a suction ring; 46: an interior space; 51: a peripheral wall; 52: a suction port; 70: an inflow suppressing section; 72: a water inflow part; 73: a gas inflow section; 73 a: a gas inflow portion (1 st gas inflow portion); 73 b: a gas inflow portion (2 nd gas inflow portion); 74: an outflow section; 81: an external gas intake port; 81 a: an external gas intake port (No. 1 external gas intake port); 81 b: an external gas intake port (2 nd external gas intake port); 83: an adjustment member (adjustment section); 83 a: an adjustment member (1 st adjustment unit); 83 b: an adjustment member (2 nd adjustment portion); 84: a cylinder portion (cover portion); 96: a wind blocking member (inflow suppressing portion); 100: a fixed tube; f: and (3) filaments.
Detailed Description
Next, embodiments of the present invention will be explained. The directions shown in fig. 1 and 2 are defined as front-rear, left-right, and up-down directions, and the following description will be given.
(melt spinning apparatus)
First, a schematic configuration of the melt spinning apparatus 1 according to the present embodiment will be described with reference to fig. 1 to 3. Fig. 1 is a schematic view of a melt spinning apparatus 1 according to the present embodiment. Fig. 2 is an enlarged view of the spinning beam 2 and its peripheral structure, which will be described later. Fig. 3 is a sectional view taken along line III-III of fig. 2.
As shown in fig. 1, a melt spinning apparatus 1 includes a plurality of spinning beams 2 (spinning means of the present invention), a plurality of yarn cooling devices 3 (cooling means of the present invention), and a plurality of air discharge means 4. Each spinning beam 2 spins a filament f formed of a molten polymer. The yarn cooling device 3 provided corresponding to each spinning beam 2 cools the spun yarn f. The exhaust unit 4 sucks and exhausts the monomer (polymer material) gas generated from the spun and tightened filament f. In the present embodiment, one air exhaust unit 4 is provided corresponding to the two spinning beams 2 and the two yarn cooling devices 3. Specifically, an air exhaust unit 4a is provided corresponding to a spinning beam 2a (the 1 st spinning unit of the present invention), a spinning beam 2b (the 2 nd spinning unit of the present invention) different from the spinning beam 2a, and yarn cooling devices 3a and 3 b. Further, an exhaust unit 4b is provided corresponding to the spinning beams 2c and 2d and the yarn cooling devices 3c and 3 d. The gas sucked by each exhaust unit 4 is discharged through a fixed pipe 100 fixedly provided.
The spinning beam 2 is configured to spin a plurality of yarns Y made of a molten polymer. The molten polymer spun in the present embodiment is, for example, nylon 6(PA 6). As shown in fig. 2, the spinning beam 2 includes a plurality of module cases 11. A plurality of spinning modules 12 are mounted in the module housings 11, respectively. In the present embodiment, 12 spin packs 12 are mounted in 12 pack housings 11, respectively. The plurality of module housings 11 (the plurality of spinning modules 12) are arranged in 2 rows, for example, in the left-right direction, and are staggered. The molten polymer is supplied to each spinning module 12 from a pipe or the like not shown. The arrangement of the module case 11 is not limited to the above. For example, the module cases 11 may be arranged in 1 row in the left-right direction, for example. Alternatively, the module housings 11 may be arranged in 3 or more rows. In the case where the module cases 11 are arranged in a plurality of rows, the module cases 11 may be arranged in a staggered manner, or may be aligned in the left-right direction. Alternatively, the plurality of module cases 11 may not be arranged linearly, and may be arranged to form a virtual circle when viewed from the vertical direction, for example.
A spinneret 13 having a plurality of nozzles 14 is disposed at the lower end of each spinning pack 12. The spin pack 12 spins the molten polymer as filaments f from the plurality of nozzles 14 of the spin pack 13. That is, one multifilament (yarn Y) composed of a plurality of filaments f is spun from one spinning nozzle 13. Here, as described above, the monomer gas is generated from the spun-out filament f. The gas of the monomer is sucked and discharged by the gas discharge unit 4.
The yarn cooling device 3 is a device for cooling the filaments f spun from the plurality of spinning units 12. The yarn cooling device 3 is disposed below the spinning beam 2. As shown in fig. 2 and 3, the yarn cooling device 3 includes a case 20, a plurality of cooling cylinders 21 housed in the case 20, a plurality of partition cylinders 22, and the like.
As shown in fig. 2, the inner space of the case 20 is partitioned vertically by a rectifying plate 23. The rectifying plate 23 is a member formed of a material having a rectifying function such as a punching metal, and is horizontally arranged. A cooling cylinder 21 is disposed in an upper space (a space above the rectifying plate 23) of the box body 20 at a position directly below the spin pack 12. The plurality of cooling barrels 21 are arranged in a staggered manner in the left-right direction corresponding to the arrangement of the plurality of spinning modules 12 (see fig. 3). The wall of the cooling cylinder 21 is formed of a material having a flow rectification function, such as a punched metal, similarly to the flow rectification plate 23. A plurality of partition cylinders 22 are disposed in a lower space (a space below the rectifying plate 23) of the case 20 at positions directly below the plurality of cooling cylinders 21. Unlike the cooling drum 21, the wall of the partition drum 22 is formed of an air-impermeable material. The filament f passes through the internal space of the cooling cylinder 21 and the internal space of the partition cylinder 22 immediately below the spin pack 12 in this order.
A duct 25 is connected to a rear portion of a lower portion of the case 20. In the duct 25, air for cooling the filaments f is supplied into the duct 25 by a compressed air source not shown. Air is supplied into the lower space of the cabinet 20 through the duct 25. The cooling air flowing into the lower space of the case 20 is upwardly rectified by the horizontally arranged rectifying plates 23 and flows into the upper space of the case 20. The air flowing into the upper space of the casing 20 is rectified when passing through the wall of the cooling cylinder 21, and flows into the cooling cylinder 21. Thus, air is blown to the filaments f from the outside of the cooling cylinder 21 over the entire circumference thereof in the cooling cylinder 21, thereby cooling the filaments f. Further, since the wall of the partition cylinder 22 is impermeable to air, air does not flow directly into the partition cylinder 22 from the lower space of the case 20.
The air discharge unit 4 is disposed between the spinning beam 2 and the yarn cooling device 3 in the traveling direction of the filaments f. The gas discharge unit 4 sucks and discharges a monomer gas generated from the molten polymer spun from the plurality of nozzles 14 of the spinneret 13. Details will be described later.
Further, a finish yarn guide 5 for applying a finish to the yarn Y is disposed below the cooling cylinder 21 and the partition cylinder 22. The yarn Y cooled by the cooling cylinder 21 is brought into contact with the finish yarn guide 5. At this time, the finish guide 5 discharges the finish to the yarn Y and applies the finish to the yarn Y. The yarn Y to which the finish has been applied by the finish guide 5 is drawn by a drawing roller (not shown) disposed below the finish guide 5. The yarn Y is further conveyed to a winding device (not shown), and is wound around a bobbin (not shown) in the winding device.
(exhaust unit)
Next, the structure of the exhaust unit 4 will be described with reference to fig. 4 to 6. Fig. 4 is a plan view of the suction member 31 and its periphery, which will be described later. Fig. 5 is a cross-sectional view taken along line V-V of fig. 4. Fig. 6 is an explanatory diagram showing the configuration of the aspirator 33 and its surroundings, which will be described later.
The exhaust unit 4 is configured to suck and exhaust gas (hereinafter, simply referred to as gas) including monomer gas generated from the molten polymer after spinning. That is, the exhaust unit 4 is provided with an exhaust passage 30 (see fig. 1 and 4) for sucking and discharging gas. As shown in fig. 4 to 6, the exhaust unit 4 includes two suction members 31 (suction portions of the present invention), two ducts 32 (duct portions of the present invention), an aspirator 33 (exhaust device of the present invention), and a connection pipe 34 (see fig. 6). The exhaust unit 4 sucks gas from a space radially inside a plurality of suction rings 42 (described later) provided in the suction member 31 by a negative pressure generated by water flowing in the aspirator 33, and discharges the gas through the duct 32, the aspirator 33, and the connection pipe 34 (see an arrow in fig. 4). In the present embodiment, one suction member 31 is provided corresponding to one spinning beam 2 (see fig. 1). For example, a suction member 31a (suction portion 1 of the present invention) is provided corresponding to the spinning beam 2a, and a suction member 31b (suction portion 2 of the present invention) is provided corresponding to the spinning beam 2 b.
As shown in fig. 4, each suction member 31 has a surrounding member 41 and a plurality of suction rings 42. The enclosing member 41 is a member as follows: the plurality of suction rings 42 are attached so as to surround the plurality of suction rings 42, and are used to flow the gas discharged from the inside of the plurality of suction rings 42 toward the gas aspirator 33 in the direction in which the gas is discharged (gas discharge direction). The enclosing member 41 is connected to the aspirator 33 via the duct 32. The enclosing member 41 has a substantially flat shape as a whole. In the surrounding member 41, an internal space 46 is formed by two flat plates 43 and 44 arranged vertically and substantially horizontally, and a side wall 45 connecting outer peripheral portions of the flat plates 43 and 44 to each other (see fig. 5). The internal space 46 is a space that is almost closed to the space where the melt spinning apparatus 1 is installed, except for a portion where a suction port 52 described later is formed.
The surrounding member 41 includes: an enclosing portion 47 enclosing the plurality of suction rings 42; and two flow path sections 48 arranged on the gas aspirator 33 side with respect to the surrounding section 47 in the gas discharge direction (in fig. 5, the surrounding section 47 and the two flow path sections 48 are distinguished by a two-dot chain line 101). The surrounding portion 47 has a rectangular shape when viewed from above (see fig. 4). The surrounding portion 47 is disposed between the spinning beam 2 and the yarn cooling device 3 in the vertical direction (see fig. 5). The surrounding portion 47 is formed with a plurality of fitting holes 49 into which the plurality of suction rings 42 are fitted, respectively. The fitting holes 49 are arranged in the left-right direction in a staggered manner corresponding to the spinneret 13. The two flow path portions 48 are portions connected to the distal ends of the surrounding portion 47. The two flow path portions 48 are arranged in the left-right direction and each have a substantially triangular shape when viewed from above. The distal ends of the two flow path portions 48 are attached to the duct 32.
The plurality of suction rings 42 are members for discharging gas generated from the spun and tightened filaments f. As shown in fig. 5, the plurality of suction rings 42 are disposed between the spin pack 12 and the cooling cylinder 21 in the vertical direction. Each of the suction rings 42 is arranged to surround the spun-out filament f. The plurality of suction rings 42 are fitted into the plurality of fitting holes 49 of the surrounding member 41, respectively, and attached so as to be surrounded by the surrounding member 41. A plurality of suction ports 52 are formed in the circumferential wall 51 of each suction ring 42 so as to be aligned in the circumferential direction of each suction ring 42. The space inside the suction ring 42 communicates with the internal space 46 of the surrounding member 41 through the plurality of suction ports 52.
The duct 32 is configured to connect the surrounding member 41 and the aspirator 33. That is, the duct 32 is disposed on the downstream side of the surrounding member 41 in the gas discharge direction and on the upstream side of the getter 33 in the gas discharge direction. The duct 32 has two upstream portions 61 and one downstream portion 62. The tip ends (downstream ends in the gas discharge direction) of the two flow path portions 48 of the surrounding member 41 are attached to the two upstream portions 61, respectively. The two upstream portions 61 join the upstream end of the downstream portion 62. The downstream end of the downstream portion 62 in the gas discharge direction is connected to the aspirator 33. In the present embodiment, one duct 32 is provided corresponding to one suction member 31. For example, a duct 32a (1 st duct part of the present invention) is provided corresponding to the suction member 31a, and a duct 32b (2 nd duct part of the present invention) is provided corresponding to the suction member 31b (see fig. 4).
The gas aspirator 33 is a device for sucking and discharging gas. The aspirator 33 is disposed downstream of the suction member 31 and the duct 32 in the gas discharge direction. The gas aspirator 33 can generate a minute suction pressure (for example, -5Pa) by a flow accompanying the water flowing inside, and can dissolve and discharge the monomer gas into the water. The aspirator 33 can change the output by changing the flow rate condition of the water flowing inside. As shown in fig. 6, the aspirator 33 includes a main body 71, a water inflow portion 72, two gas inflow portions 73, and an outflow portion 74.
The main body 71 is a cylindrical portion extending in the vertical direction. A water inflow portion 72 for allowing water to flow in is provided at an upper portion of the main body 71. Two gas inflow portions 73 for allowing gas to flow in are provided on both left and right side surfaces of the main body 71. An outflow portion 74 for allowing water and gas to flow out is provided at a lower portion of the main body 71.
The water inflow portion 72 is provided at an upper portion of the main body 71, and is attached to a pipe 75 connected to a water source, not shown. The water inflow portion 72 is formed with a water inflow port 76 (see fig. 7 (a)) for allowing water to flow therein.
The two gas inflow portions 73 are substantially cylindrical portions provided on both left and right side surfaces of the main body 71. The two gas inflow portions 73 are respectively formed with gas inflow ports 77 (see fig. 7 (a)) for allowing gas to flow in. The two gas inflow portions 73 are connected to the suction member 31 via the ducts 32, respectively. For example, a gas inflow portion 73a (1 st gas inflow portion of the present invention) is provided corresponding to the duct 32a, and a gas inflow portion 73b (2 nd gas inflow portion of the present invention) is provided corresponding to the duct 32 b.
The outflow portion 74 is provided at the lower portion of the main body 71 and attached to the connection pipe 34. The outflow portion 74 is formed with an outflow port 78 (see fig. 7 (a)) for allowing water and gas to flow out.
The connection pipe 34 is disposed downstream of the aspirator 33 in the gas discharge direction. An outflow portion 74 of the aspirator 33 is attached to an upstream end portion of the connection pipe 34 in the gas discharge direction. The downstream end of the connection pipe 34 in the gas discharge direction is attached to the middle of the fixed pipe 100 in the extending direction of the fixed pipe 100.
As described above, in the exhaust unit 4, the exhaust passage 30 for exhausting the gas is formed by the suction member 31, the duct 32, the aspirator 33, and the connection pipe 34.
In the exhaust unit 4 having the above-described configuration, a downward accompanying flow is generated as the water entering from the water inflow portion 72 of the air aspirator 33 flows inside the main body 71 (see the two-dot chain line arrow in fig. 6). This accompanying flow generates a negative pressure in the vicinity of the suction port 52 of the suction ring 42 (see fig. 4), and sucks gas from the inside of the suction ring 42 into the internal space 46 (see fig. 4) of the surrounding member 41. Further, the gas flows into the gas inflow portion 73 of the gas aspirator 33 through the inside of the duct 32 (see the broken line arrow in fig. 6). The gas flowing into the gas inflow portion 73 flows out of the outflow portion 74 together with water, and flows into the fixed pipe 100 through the inside of the connection pipe 34. In this way, the gas is sucked and discharged by the exhaust unit 4. Further, since the internal space 46 formed by the surrounding member 41 is almost sealed as described above, even if the negative pressure generated by the aspirator 33 is weak, a strong suction force can be generated in the vicinity of the suction port 52 of the suction ring 42.
Here, as described above, the connection pipe 34 is connected to the middle portion of the fixed pipe 100. In such a case, for example, if the gas flow is disturbed at the point of confluence between the fixed pipe 100 and the connection pipe 34, a part of the gas may flow into the connection pipe 34 from the fixed pipe 100 (see the dashed-dotted arrow in fig. 6). In particular, in the configuration in which the plurality of air aspirators 33 are provided, a large amount of water may flow into the fixed pipe 100, and a large amount of water W (see fig. 6) may flow into the fixed pipe 100, thereby generating a strong accompanying flow. When such an accompanying flow flows back from the fixed pipe 100 to the connection pipe 34, the negative pressure may greatly vary on the upstream side in the gas discharge direction. Therefore, the air flow is disturbed near the spun and tightened filament f (see fig. 2), and the filament f oscillates, which may deteriorate the yarn quality.
Therefore, it is necessary to suppress the inflow of gas from the fixed pipe 100 to the connection pipe 34. For this reason, for example, it is conceivable to increase the flow rate of water flowing toward the aspirator 33 and increase the accompanying flow flowing from the connection pipe 34 toward the fixed pipe 100 (i.e., toward the downstream side in the gas discharge direction). This suppresses the inflow of the gas from the fixed pipe 100 to the connection pipe 34.
On the other hand, if such accompanying flow becomes strong, the negative pressure in the space on the upstream side in the gas discharge direction from the aspirator 33 becomes strong, and the discharge speed of the gas near the filament f becomes excessively high, and there is a possibility that the filament f greatly oscillates. Therefore, as a further measure, for example, it is conceivable to provide a valve between the suction member 31 and the aspirator 33 in the gas discharge direction to increase the flow path resistance and to suppress the flow rate of the gas to a small value. However, this method has the following problems: the gas discharge flow path 30 is narrowed by the valve, and the flow path is easily clogged when the monomer is solidified. Therefore, in the present embodiment, the exhaust unit 4 has the following configuration so as to prevent the exhaust passage 30 from being narrowed and to suppress an increase in the exhaust speed of the gas in the vicinity of the filament f even when the output of the aspirator 33 is strong (that is, the flow rate of water is large). Specifically, the exhaust unit 4 includes an inflow suppressing portion 70 (see fig. 7 (a) and (b)) for suppressing inflow of gas from the fixed pipe 100 to the connection pipe 34. The inflow suppressing unit 70 includes the above-described aspirator 33 and an external air intake port 81 described later.
(detailed construction of exhaust Unit)
The more detailed structure of the exhaust unit 4 will be described with reference to (a) and (b) in fig. 7, (a) and (b) in fig. 8, and (a) and (b) in fig. 9. Fig. 7 (a) is a cross-sectional view of the aspirator 33, which is orthogonal to the front-rear direction. Fig. 7 (b) is a perspective view of the gas inflow portion 73. Fig. 8 (a) is a front view of the aspirator 33 including an adjustment member 83 described later. Fig. 8 (b) is a perspective view of the adjustment member 83. Fig. 9 (a) is an IXa-direction view of fig. 8 (b). Fig. 9 (b) is an explanatory diagram showing a state of the adjustment member 83 after the adjustment member 83 is moved from the state shown in fig. 9 (a). In fig. 7 (a) and (b), the adjusting member 83 is not shown.
As shown in fig. 7 (a) and (b), an external air intake port 81 is formed in each gas inflow portion 73 of the getter 33. The outside air intake port 81 communicates the discharge channel 30 with a space (outside space 82) outside the discharge channel 30, and takes in outside air (air) from the outside space 82 to the discharge channel 30. The external air inlet 81 is formed in a slit shape, for example, along the circumferential direction of the gas inflow portion 73 so as to surround substantially half of the circumference of the gas inflow portion 73. The external air intake port 81 is open upward, for example. In this way, the outside air inlet 81 communicates the discharge channel 30 with the outside space 82. An external air inlet 81a (the 1 st external air inlet of the present invention) is formed corresponding to the gas inflow portion 73a, and an external air inlet 81b (the 2 nd external air inlet of the present invention) is formed corresponding to the gas inflow portion 73 b. In the present embodiment, two external air intake ports 81a and 81b are formed, respectively. The number of the external air intake ports 81 is not limited to this.
As shown in fig. 8 (a) and (b), an adjusting member 83 (adjusting portion of the present invention) is attached to each gas inflow portion 73. The adjustment member 83 is used to adjust the opening degree of the outside air intake port 81. An adjustment member 83a (the 1 st adjustment unit of the present invention) is provided corresponding to the external air inlet 81a, and an adjustment member 83b (the 2 nd adjustment unit of the present invention) is provided corresponding to the external air inlet 81 b. The adjustment member 83 has a cylinder portion 84 (cover portion of the present invention) and a knob portion 85.
The cylindrical portion 84 is a cylindrical portion and is disposed so as to surround the portion of the gas inflow portion 73 where the external gas intake port 81 is formed. The cylindrical portion 84 is formed with a slit 86 along the circumferential direction of the cylindrical portion 84 so as to surround the cylindrical portion 84 by substantially half of the circumference. The slit 86 is disposed at substantially the same position as the external air inlet 81 in the direction in which the gas inflow portion 73 extends. The cylindrical portion 84 is configured to be rotatable (i.e., movable) in the circumferential direction of the cylindrical portion 84 along a surface of the gas inflow portion 73 including the edge of the external-gas intake port 81 (i.e., the circumferential surface of the gas inflow portion 73) (see an arrow in fig. 8 (b)).
The tab portion 85 is a portion that protrudes outward in the radial direction of the tube portion 84 from a part of the tube portion 84 in the circumferential direction. The knob portion 85 has a size that can be manually held by the operator so that the operator can manually rotate the tube portion 84.
The operator can move the slit 86 of the tube portion 84 along the circumferential surface of the gas inlet 73 by rotating the tube portion 84 by pinching the knob portion 85 with a hand. This enables the opening degree of the external air inlet 81 to be adjusted by changing the positional relationship between the slit 86 and the external air inlet 81. For example, the opening degree of the external air inlet 81 when the slit 86 and the external air inlet 81 are completely overlapped (see (a) in fig. 9) is 2 times (see hatched portions in (a) and (b) in fig. 9) the opening degree of the external air inlet 81 when the slit 86 and the external air inlet 81 are overlapped at half (see (b) in fig. 9).
Further, a pressure gauge 87 (see fig. 8 (a)) for detecting the pressure of the gas is disposed near the external air inlet 81 of the gas inflow portion 73.
(gas flow near the external gas intake port)
Next, the flow of air in the vicinity of the external air intake port 81 of the gas inflow portion 73 of the exhaust unit 4 having the inflow suppressing portion 70 will be described with reference to fig. 10.
When water flows through the aspirator 33 (see the two-dot chain line arrow in fig. 10), a negative pressure is generated by the accompanying flow, and gas is sucked through the gas inflow portion 73 (see the broken line arrow in fig. 10). Here, the accompanying flow becomes stronger as the water flow amount increases, and the inflow of gas from the fixed pipe 100 (see fig. 6) to the connection pipe 34 can be suppressed. Further, the negative pressure causes the external air to be taken in from the external space 82 to the gas inflow portion 73 through the external air intake port 81 formed in the gas inflow portion 73 (see the dashed-dotted arrow in fig. 10). Thereby, in the vicinity of the external air inlet 81, the gas flowing through the discharge channel 30 merges with the external air, and the suction pressure (negative pressure) is reduced. Therefore, even if the flow rate of water flowing into the aspirator 33 is increased to increase the accompanying flow, the flow velocity of gas flowing from the upstream side in the gas discharge direction from the outside air inlet 81 can be made smaller than in the case where the outside air inlet 81 is not formed. Further, the increase in the discharge speed of the gas in the vicinity of the spun-out filament f (see fig. 2) can be suppressed. In this way, the aspirator 33 and the external air inlet 81 can suppress the inflow of air from the fixed pipe 100 to the connection pipe 34 while suppressing the filament f from easily swinging.
Further, the operator can finely adjust the flow rate of the external gas taken in through the external gas taking-in port 81 for each gas inflow portion 73 by moving the adjusting member 83 based on the detection result of the pressure gauge 87 and adjusting the opening degree of the external gas taking-in port 81. This can suppress the occurrence of variations in the gas flow velocity in the vicinity of the suction port 52 (see fig. 5) among the plurality of suction members 31 (see fig. 4). The opening degree of the outside air inlet 81 may be adjusted in advance before the melt spinning apparatus 1 is operated. That is, it is not necessary to adjust the opening degree of the outside air intake port 81 as needed during the operation of the melt spinning apparatus 1.
As described above, the inflow suppressing unit 70 suppresses the inflow of gas from the fixed pipe 100 to the connection pipe 34. Thus, turbulence of the air flow near the filament f can be suppressed.
Further, an external air intake port 81 is formed in the gas inflow portion 73. Accordingly, when the aspirator 33 is operated, the external air can be taken into the discharge channel 30 through the external air inlet 81, and therefore, the suction pressure (negative pressure) can be reduced by merging the gas flowing through the discharge channel 30 with the external air. Therefore, the flow rate of the gas flowing from the upstream side in the gas discharge direction from the outside air inlet 81 can be reduced as compared with the case where the outside air inlet 81 is not formed. Therefore, even when the output of the aspirator 33 is strong (the flow rate of water is large), the discharge flow path 30 of the gas is not narrowed, and the discharge speed of the gas near the filament f can be suppressed from increasing, and the turbulence of the gas flow near the filament f can be suppressed.
When the flow rate of the outside air taken in through the outside air intake port 81 is to be adjusted, the flow rate can be adjusted by adjusting the opening degree of the outside air intake port 81 by the adjusting member 83.
Further, the opening degree of the outside air inlet 81 can be adjusted by rotating (moving) the cylindrical portion 84 of the adjusting member 83 along the circumferential surface of the gas inflow portion 73. In this way, the opening degree of the outside air intake port 81 can be easily adjusted by a simple operation of moving the cylinder portion 84.
In the configuration in which the plurality of exhaust units 4 are provided (that is, the plurality of connection pipes 34 are connected to the fixed pipe 100), the optimum flow rate of the outside air taken in through the outside air intake port 81 may differ for each exhaust unit 4. In such a configuration, it is particularly effective to provide the adjusting member 83 in each exhaust unit 4.
In the configuration in which one getter 33 is provided with the gas inflow portion 73a and the gas inflow portion 73b, there is a possibility that the optimal flow rate of the external gas taken in through the external gas intake port 81 differs for each gas inflow portion 73. In such a configuration, it is particularly effective to provide the adjustment member 83a and the adjustment member 83 b.
The external air intake port 81 is formed in the gas inflow portion 73 of the getter 33 and is disposed at a position distant from the suction member 31. Therefore, as compared with the case where the outside air intake port 81 is disposed at a position close to the suction member 31, the occurrence of turbulence in the air flow near the filament f can be suppressed, and the filament f can be suppressed from being easily swung.
In the present embodiment, the suction ring 42 and the surrounding member 41 form a substantially closed internal space 46. This allows the gas to be efficiently sucked into the internal space 46 even if the negative pressure generated by the aspirator 33 is weak. Therefore, even if the negative pressure slightly fluctuates, the amount of air sucked may fluctuate greatly, and the filament f may oscillate due to disturbance of the air flow. In such a configuration, it is particularly effective to reduce the negative pressure in the vicinity of the filament f and suppress an increase in the gas discharge speed by taking in the external air through the external air intake port 81.
In addition, in the configuration in which the aspirator 33 is applied as a means for discharging gas, a large amount of water may flow into the fixed pipe 100 to generate a strong accompanying flow. Therefore, in order to suppress the accompanying flow flowing from the fixed pipe 100 to the connection pipe 34, it is necessary to increase the amount of water flowing to the aspirator 33 and to increase the accompanying flow flowing from the connection pipe 34 to the fixed pipe 100. In such a configuration, it is particularly effective to reduce the negative pressure in the vicinity of the filament f and suppress an increase in the gas discharge speed by taking in the external air through the external air intake port 81.
Next, a modification of the above embodiment will be described. Note that the same reference numerals are given to members having the same configurations as those of the above-described embodiment, and the description thereof will be omitted as appropriate.
(1) In the above embodiment, the external air inlet 81 extends in a slit shape along the circumferential direction of the gas inflow portion 73, but is not limited thereto. The external air inlet 81 may extend in a slit shape along the direction in which the gas inflow portion 73 extends, for example. Alternatively, the outside air inlet 81 may be a circular hole. That is, the outside air intake port 81 may have any shape.
(2) In the embodiments described above, the cylindrical portion 84 of the adjustment member 83 is rotatable along the circumferential surface of the gas inflow portion 73, but the present invention is not limited to this. For example, the cylinder portion 84 may be configured to be movable in a direction in which the gas inflow portion 73 extends.
(3) In the embodiments described above, the adjustment member 83 moves along the circumferential surface of the gas inflow portion 73 to change the opening degree of the external air inlet 81, but the present invention is not limited to this. For example, the adjustment member 83 may have a sliding member, not shown, that is slidable with respect to the slit 86. Further, the opening degree of the slit 86 itself may be changed by sliding the sliding member, and as a result, the opening degree of the outside air intake port 81 may be changed.
(4) In the embodiments described above, the external air intake port 81 is formed in the gas inflow portion 73 of the getter 33, and the adjustment member 83 for adjusting the opening degree of the external air intake port 81 is disposed so as to surround the gas inflow portion 73, but the present invention is not limited thereto. For example, as shown in fig. 11, an external air intake port 92 may be formed in the duct 91, and an external air intake port may not be formed in the gas inflow portion 94 of the getter 93. Further, the adjustment member 83 may be disposed so as to surround the duct 91. Alternatively, the outside air intake port 92 may be formed in both the gas inflow portion 94 and the duct 91. Alternatively, the outside air intake port may be formed in the flow path portion 48 of the surrounding member 41, for example. In this case, the flow path portion 48 also corresponds to the duct portion of the present invention. The surrounding portion 47 of the surrounding member 41 and the suction ring 42 correspond to a suction portion of the present invention.
(5) In the embodiments described above, the melt spinning apparatus 1 includes the plurality of air discharge units 4, but is not limited thereto. The number of the exhaust units 4 may also be one.
(6) In the embodiments described above, the gas aspirator 33 has two gas inflow portions 73, but the present invention is not limited to this. That is, the number of the gas inflow portions 73 included in one gas aspirator 33 may be one, or 3 or more.
(7) In the embodiments described above, the exhaust unit 4 has the adjustment member 83, but the present invention is not limited to this. The adjustment member 83 is not necessarily provided.
(8) In the embodiments described above, the inflow suppressing unit 70 includes the aspirator 33 and the outside air intake port 81, but other members may further function as the inflow suppressing unit. Hereinafter, description will be given with reference to fig. 12. First, as shown in fig. 12, the gas in the fixed pipe 100 flows from the left side (one side of the present invention) to the right side (the other side of the present invention) in the extending direction (the left-right direction) of the fixed pipe 100. A wind shield member 96 is disposed on the downstream side of the connection pipe 34 in the gas discharge direction so as to extend toward the inside of the fixed pipe 100. The wind shielding member 96 is a tubular body made of a hose, for example. Alternatively, the wind shielding member 96 may be formed of a metal plate. The shape of the wind shielding member 96 is not necessarily limited to a cylindrical shape, and may be, for example, a half-cylindrical shape. That is, the wind shielding member 96 may extend from at least the lower left end of the connection pipe 34 toward the inside of the fixed pipe 100. In addition, the wind shielding member 96 is disposed so as not to contact the water W flowing in the fixed pipe 100, so that the gas inside the fixed pipe 100 reliably flows in the extending direction. The gas in the fixed pipe 100 flows so as to be guided downward by the wind shielding member 96 as described above (see the arrow of the chain line in fig. 12), and the gas is prevented from flowing into the connection pipe 34. The wind shielding member 96 may extend in the vertical direction (the direction orthogonal to the present invention) orthogonal to the horizontal direction, or may be disposed so as to be inclined to the right side with respect to the vertical direction (see fig. 12), for example. Accordingly, as compared with the configuration in which the wind blocking member 96 is inclined to the left with respect to the vertical direction, the gas having collided with the wind blocking member 96 can be suppressed from flowing back to the left and then moving to the right again. Therefore, the inflow of gas from the fixed pipe 100 to the connection pipe 34 can be effectively suppressed.
In the above configuration, the outside air intake port 81 (see fig. 12) may be formed, or the outside air intake port 81 may not be formed. In other words, the wind shielding member 96 can suppress the inflow of gas from the fixed pipe 100 to the connection pipe 34 in addition to the inflow suppressing portion 70. Alternatively, the inflow of gas from the fixed pipe 100 to the connection pipe 34 may be suppressed only by the wind blocking member 96 without forming the outside air intake port 81. In such a configuration, the output of the aspirator 33 does not need to be enhanced. That is, in this case, the wind blocking member 96 corresponds to the inflow suppressing portion of the present invention.
(9) In the above-described embodiments, the suction member 31 includes the suction ring 42 arranged to surround the filament f and the surrounding member 41 to which the suction ring 42 is attached, but is not limited thereto. That is, the suction member 31 is not necessarily disposed so as to surround the filament f.
(10) In the embodiments described above, the aspirator 33 is provided as the exhaust device, but the present invention is not limited to this. A known blower or the like may be provided in addition to the aspirator 33 or in place of the aspirator 33. In addition, when a blower is provided instead of the aspirator 33, the water W does not flow inside the fixed pipe 100 (that is, only the gas flows inside the fixed pipe 100 by the suction of the blower). In such a configuration, as in the above-described embodiments, it is effective to suppress the inflow of gas from the fixed pipe 100 to the connection pipe 34.
(11) In the embodiments described above, the spinning beam 2 spins nylon 6 as a polymer, but the present invention is not limited to this. The present invention can be applied to the case where other kinds of polymers such as nylon and polyester are spun.
Claims (11)
1. A melt spinning apparatus, comprising:
a spinning unit having a spinning nozzle for spinning filaments;
a cooling unit having a cooling cylinder disposed below the spinneret and cooling the filaments spun from the spinneret; and
an exhaust unit disposed between the spinning unit and the cooling unit in a traveling direction of the filament, and having an exhaust passage for sucking and discharging gas generated from the filament,
the exhaust unit includes:
a suction section disposed between the spinneret and the cooling cylinder, and having a suction port for sucking the gas;
a duct portion disposed downstream of the suction portion in a gas discharge direction in which the gas is discharged;
an exhaust device disposed on a downstream side of the duct portion in the gas discharge direction, for sucking and discharging the gas;
a connection pipe connected to a middle portion of a fixed pipe fixedly provided, and disposed on a downstream side of the exhaust device in the gas discharge direction; and
and an inflow suppressing unit for suppressing the gas from flowing from the fixed pipe to the connection pipe.
2. The melt spinning apparatus of claim 1,
the exhaust device is configured to be capable of changing output and has a gas inflow portion for allowing the gas to flow in,
an external air intake port for communicating the discharge flow path with a space outside the discharge flow path is formed in at least one of the gas inflow portion and the duct portion,
the inflow suppressing portion includes the exhaust device and the external air intake port.
3. The melt spinning apparatus of claim 2,
the exhaust unit includes an adjustment unit for adjusting an opening degree of the external air intake port.
4. The melt spinning apparatus of claim 3,
the adjusting part has a cover part for covering a part of the external air inlet,
the cover section is movable along a plane including an edge of the external air intake port, whereby an area of a portion covering the external air intake port can be changed.
5. The melt spinning apparatus of claim 3 or 4,
the exhaust device is provided with a plurality of the exhaust units.
6. The melt spinning apparatus of any one of claims 3 to 5,
the spinning unit comprises a1 st spinning unit and a 2 nd spinning unit different from the 1 st spinning unit,
the exhaust unit has a1 st suction part corresponding to the 1 st spinning unit and a 2 nd suction part corresponding to the 2 nd spinning unit as the suction part,
the exhaust unit includes a1 st duct portion corresponding to the 1 st suction portion and a 2 nd duct portion corresponding to the 2 nd suction portion as the duct portion,
the exhaust device has a1 st gas inflow portion corresponding to the 1 st duct portion and a 2 nd gas inflow portion corresponding to the 2 nd duct portion as the gas inflow portion,
the external air intake port includes a1 st external air intake port corresponding to the 1 st duct portion and the 1 st gas inflow portion, and a 2 nd external air intake port corresponding to the 2 nd duct portion and the 2 nd gas inflow portion,
the adjustment unit includes a1 st adjustment unit for adjusting an opening degree of the 1 st outside air intake port, and a 2 nd adjustment unit for adjusting an opening degree of the 2 nd outside air intake port.
7. The melt spinning apparatus of any one of claims 2 to 6,
the external air intake port is formed in the air inflow portion of the exhaust device.
8. The melt spinning apparatus of any one of claims 1 to 7,
the inflow suppressing portion includes a wind blocking member that is disposed on a downstream side of the connecting pipe in the gas discharge direction, and is provided to extend toward an inner side of the fixed pipe, and prevents the gas in the fixed pipe from flowing into the connecting pipe.
9. The melt spinning apparatus of claim 8,
the gas is discharged from one side to the other side of the extending direction of the fixed pipe,
the wind shielding member extends along a direction orthogonal to the extending direction, or is disposed to be inclined toward the other side of the extending direction with respect to the orthogonal direction.
10. The melt spinning apparatus of any one of claims 1 to 9,
the suction part comprises:
a suction ring disposed so as to surround the filaments spun from the spinneret, the suction ring having a peripheral wall in which the suction port is formed; and
and a surrounding member connected to the exhaust device, surrounding the suction ring, and forming an inner space in which the gas discharged from the inside of the suction ring flows.
11. The melt spinning apparatus of any one of claims 1 to 10,
the exhaust device is an aspirator,
the aspirator comprises:
a water inflow part which is provided separately from the gas inflow part and is used for water inflow; and
and an outflow part connected to the connection pipe, for allowing the gas and the water to flow out.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019081480A JP7256066B2 (en) | 2019-04-23 | 2019-04-23 | Melt spinning equipment |
| JP2019-081480 | 2019-04-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111826729A true CN111826729A (en) | 2020-10-27 |
| CN111826729B CN111826729B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010206180.4A Active CN111826729B (en) | 2019-04-23 | 2020-03-23 | Melt spinning apparatus |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3730678B1 (en) |
| JP (1) | JP7256066B2 (en) |
| CN (1) | CN111826729B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411020A (en) * | 2020-11-24 | 2021-02-26 | 浙江熔聚装备科技有限公司 | Energy-saving device and non-woven fabric manufacturing equipment |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021000149A1 (en) | 2021-01-15 | 2022-07-21 | Oerlikon Textile Gmbh & Co. Kg | Device for melt spinning and cooling a freshly extruded filament sheet |
| CN115029802B (en) * | 2022-05-13 | 2023-07-04 | 杭州青云新材料股份有限公司 | Preparation system and method of high-recovery heavy denier spandex based on low plastic deformation |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7256066B2 (en) | 2023-04-11 |
| CN111826729B (en) | 2023-04-18 |
| EP3730678B1 (en) | 2021-06-09 |
| EP3730678A1 (en) | 2020-10-28 |
| JP2020176354A (en) | 2020-10-29 |
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