EP3730678A1 - Melt spinning system - Google Patents
Melt spinning system Download PDFInfo
- Publication number
- EP3730678A1 EP3730678A1 EP20165859.8A EP20165859A EP3730678A1 EP 3730678 A1 EP3730678 A1 EP 3730678A1 EP 20165859 A EP20165859 A EP 20165859A EP 3730678 A1 EP3730678 A1 EP 3730678A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- gas
- outside air
- air intake
- sucking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002074 melt spinning Methods 0.000 title claims abstract description 39
- 238000009987 spinning Methods 0.000 claims abstract description 52
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 239000002699 waste material Substances 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000011144 upstream manufacturing Methods 0.000 description 17
- 239000000178 monomer Substances 0.000 description 13
- 229920000642 polymer Polymers 0.000 description 12
- 230000003247 decreasing effect Effects 0.000 description 8
- 238000000638 solvent extraction Methods 0.000 description 7
- 230000003190 augmentative effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229920002292 Nylon 6 Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Definitions
- the present invention relates to a melt spinning system.
- a melt spinning device recited in Patent Literature 1 spins molten polymer out as filaments from a spinneret.
- the filaments spun out are cooled by cooling wind which is supplied through a cooling cylinder being provided below the spinneret.
- monomer gas is generated from the filaments immediately after being spun out.
- Monomers are raw materials of polymer.
- the gas is solidified and adheres to such as the spinneret or the cooling cylinder, etc., the quality of yarns may be deteriorated because the filaments are shaken by the disturbed cooling wind. In addition to that, problems such as yarn breakage or facility malfunction, etc., may happen.
- the melt spinning device described above is configured to be able to discharge the gas.
- a suction member which is formed suction ports in a wall surface and ring-shaped is provided between the spinneret and the cooling cylinder.
- a melt spinning device includes an exhaust device which sucks and discharges gas through the suction ports by generating negative pressure. The gas which is sucked by the exhaust device passes through a connecting pipe connected with the exhaust device. Then, the gas flows toward the downstream side in the direction in which the gas is discharged (gas discharge direction).
- melt spinning devices each of which includes an exhaust device are provided to form one large melt spinning system.
- connecting pipes each of which is connected with the exhaust device are provided to be merged with a fixed pipe which is fixedly provided in the production plant.
- the connecting pipe is connected to an intermediate part of the fixed pipe.
- An object of the present invention is to suppress airflow at around filaments from being disturbed.
- a melt spinning system includes: a spinning unit which includes a spinneret for spinning out filaments; a cooling unit which includes a cooling cylinder provided below the spinneret, the cooling unit cooling the filaments which are spun out from the spinneret; and at least one exhaust unit which is provided between the spinning unit and the cooling unit in a running direction of the filaments, the at least one exhaust unit including a waste channel for sucking and discharging gas which is generated from the filaments, the at least one exhaust unit including: a sucking unit which is provided between the spinneret and the cooling cylinder and includes a suction port for sucking the gas; a duct unit which is provided downstream of the sucking unit in the gas discharge direction in which the gas is discharged; an exhaust device which is provided downstream of the duct unit in the gas discharge direction and sucks and discharges the gas; a connecting pipe which is connected to an intermediate part of a fixed pipe which is fixedly provided, the connecting pipe being provided downstream of the exhaust device in the gas discharge
- the connecting pipe is connected to an intermediate part of the fixed pipe.
- part of the gas may flow backward into the connecting pipe from the fixed pipe. Because of this, airflow at around the filaments is disturbed on an upstream side in the gas discharge direction, and the filaments are easily shaken. As a result, the quality of yarns may be deteriorated, and yarn breakage may occur.
- the gas inflow into the connecting pipe from the fixed pipe is suppressed by the inflow suppressor. Therefore, airflow in the vicinity of the filaments is suppressed from being disturbed.
- the exhaust device is configured to be able to change output and includes a gas inlet for allowing the gas to flow in, at least one of the gas inlet and the duct unit includes an outside air intake which connects the waste channel with a space outside the waste channel, and the inflow suppressor includes the exhaust device and the outside air intake.
- the present invention by increasing an output of the exhaust device, a flow amount of the gas flowing in the connecting pipe is increased, and the gas inflow into the connecting pipe from the fixed pipe is suppressed. Meanwhile, when the output of the exhaust device is augmented simply, the negative pressure of a space upstream of the exhaust device in the gas discharge direction may be increased, with the result that the discharge speed of the gas at around the filaments may become excessive and the airflow in the vicinity of the filaments may be easily disturbed.
- the flow amount of the gas on the upstream side may be decreased.
- this method is disadvantageous in that the waste channel of the gas is narrowed by the valve, and when monomer gas is solidified, the channel tends to be clogged.
- At least one of the gas inlet and the duct unit is provided with an outside air intake. Because of this, when the exhaust device is in operation, outside air can be taken into the waste channel through the outside air intake. On this account, by merging the gas which flows in the waste channel with the outside air, the sucking pressure (the negative pressure) can be decreased. Therefore, the flow rate of the gas which flows from the upstream of the outside air intake in the gas discharge direction is decreased as compared to a case where the outside air intake is not formed.
- the melt spinning system of the second aspect is arranged such that the at least one exhaust unit further includes an adjustment unit for adjusting an opening degree of the outside air intake.
- the flow amount is adjustable by adjusting the opening degree of the outside air intake by the adjustment unit.
- the melt spinning system of the third aspect is arranged such that the adjustment unit includes a cover member for covering a part of the outside air intake, and by being moved along a surface which includes a periphery of the outside air intake, the cover member is able to change an area of a part which covers the outside air intake.
- the opening degree of the outside air intake is easily adjusted.
- the melt spinning system of the third or fourth aspect includes two or more exhaust units.
- the optimal flow amount of outside air which is taken in through the outside air intake may be different between the exhaust units.
- providing the adjustment unit at each exhaust unit as in the present invention is especially effective.
- the melt spinning system of any one of the third to fifth aspects further includes, as the spinning unit, a first spinning unit and a second spinning unit which is different from the first spinning unit, and the at least one exhaust unit further including: a first sucking unit corresponding to the first spinning unit and second sucking unit corresponding to the second spinning unit, as the sucking unit; a first duct unit corresponding to the first sucking unit and a second duct unit corresponding to the second sucking unit, as the duct unit, and the exhaust device further including: a first gas inlet corresponding to the first duct unit and a second gas inlet corresponding to the second duct unit, as the gas inlet unit, and a first outside air intake corresponding to the first duct unit and the first gas inlet and a second outside air intake corresponding to the second duct unit and the second gas inlet, as the outside air intake, and a first adjustment unit for adjusting an opening degree of the first outside air intake and a second adjustment unit for adjusting an opening degree of the second
- the optimal flow amount of outside air which is taken in through the outside air intake may be different between the gas inlets.
- providing the first adjustment unit and the second adjustment unit as the present invention is especially effective.
- the melt spinning system of any one of the second to sixth aspects is arranged such that the outside air intake is formed at the gas inlet of the exhaust device.
- the outside air intake at which the gas being discharged and outside air are merged is provided in the vicinity of the sucking unit in the gas discharge direction, airflow in the vicinity of the suction port may be easily disturbed and the filaments may be easily shaken.
- the outside air intake is formed at the gas inlet of the exhaust device to be far from the sucking unit. Therefore, the airflow in the vicinity of the suction port is suppressed from being easily disturbed, with the result that the filaments are suppressed from being easily disturbed.
- the melt spinning system of any one of the first to the seventh aspects is arranged such that the inflow suppressor includes a wind shield member which is provided downstream of the connecting pipe in the gas discharge direction and provided to extend toward inside of the fixed pipe in order to prevent the gas in the fixed pipe from flowing into the connecting pipe.
- the wind shield member which is provided to extend toward the inside of the fixed pipe, the gas in the fixed pipe is prevented from flowing into the connecting pipe. Therefore, without change of output of the exhaust device, or in addition to the change of the output of the exhaust device, the gas is prevented from flowing backward.
- the melt spinning system according to any one of the first to eighth aspects is arranged such that the gas is discharged from one side to the other side in an extending direction of the fixed pipe, and the wind shield member extends in an orthogonal direction which is orthogonal to the extending direction or is provided to lean to the other side in the extending direction relative to the orthogonal direction.
- the gas hitting the wind shield member flows backward to one side in the extending direction and flows to the other side again, with the result that the gas hitting the wind shield member may flow into the connecting pipe.
- the gas hitting the wind shield member is suppressed from flowing backward to one side in the extending direction. Therefore, the gas inflow into the connecting pipe from the fixed pipe is effectively suppressed.
- the melt spinning system of any one of the first to ninth aspects is arranged such that the sucking unit includes: a sucking ring which is provided to surround the filaments being spun out from the spinneret and includes the suction port formed in a circumferential wall; and an enclosure member which is connected to the exhaust device, is provided to surround the sucking ring, and includes an internal space in which the gas discharged from inside of the sucking ring flows.
- the sucking ring and the enclosure member form an internal space which is substantially sealed.
- the gas is efficiently sucked into the internal space. Because of this, a small variation of the negative pressure may greatly change the flow rate of the gas, with the result that the airflow may be disturbed and the filaments may be shaken.
- the following arrangement is especially effective: the gas inflow is suppressed from flowing backward into the connecting pipe from the fixed pipe by the inflow suppressor.
- the melt spinning system of any one of the first to tenth aspects is arranged such that the exhaust device is an aspirator which includes: a water inlet which is different from the gas inlet and allows water to flow in; and an outlet which is connected to the connecting pipe and allows the gas and the water to flow out.
- the exhaust device is an aspirator which includes: a water inlet which is different from the gas inlet and allows water to flow in; and an outlet which is connected to the connecting pipe and allows the gas and the water to flow out.
- the negative pressure is generated by an accompanied flow which is generated by water flowing in the aspirator, with the result that the gas is sucked.
- the aspirator has advantages that the aspirator is able to generate very low negative pressure by adjusting a flow amount of water and to discharge monomer by dissolving monomer into water.
- the following arrangement is especially effective: the gas inflow is suppressed from flowing backward into the connecting pipe from the fixed pipe by the inflow suppressor.
- Directions shown in FIG. 1 and FIG. 2 are defined as the front-rear, left-right, and up-down directions.
- FIG. 1 is a schematic representation of the melt spinning system 1 related to the present embodiment.
- FIG. 2 is an enlarged view of a spinning beam 2 described below and its surroundings.
- FIG. 3 is a cross section taken along a line III-III in FIG. 2 .
- the melt spinning system 1 includes spinning beams 2 (spinning units of the present invention), yarn coolers 3 (cooling units of the present invention), and exhaust units 4.
- Each spinning beam 2 spins out filaments f which are made of molten polymer.
- the yarn cooler 3 which is provided to correspond to each spinning beam 2 cools the filaments f spun out.
- the exhaust unit 4 sucks and discharges monomer (raw materials of polymer) gas which is generated from the filaments f immediately after being spun out.
- one exhaust unit 4 is provided.
- an exhaust unit 4a is provided to correspond to a spinning beam 2a (first spinning unit of the present invention), a spinning beam 2b (second spinning unit of the present invention) which is different from the spinning beam 2a, and yarn coolers 3a and 3b.
- an exhaust unit 4b is provided to correspond to spinning beams 2c and 2d and yarn coolers 3c and 3d. The gas which is sucked by each exhaust unit 4 is discharged through a fixed pipe 100 which is fixedly provided.
- the spinning beam 2 spins out yarns Y which are made of molten polymer.
- Molten polymer which is spun out in the present embodiment is, for example, nylon 6 (PA6).
- the spinning beam 2 includes pack housings 11. To the pack housings 11, spinning packs 12 are attached, respectively. In the present embodiment, to twelve pack housings 11, twelve spinning packs 12 are attached, respectively.
- the pack housings 11 (spinning packs 12) are, for example, staggered to form two lines along the left-right direction. Each spinning pack 12 is supplied with molten polymer from an unillustrated pipe, etc.
- the pack housings 11 are not necessarily arranged in this way. For example, the pack housings 11 may be, for example, aligned to form a line along the left-right direction.
- the pack housings 11 may be aligned to form three or more lines. Furthermore, when the pack housings 11 are arranged to form plural lines, the pack housings 11 may be staggered, or may be aligned in both the front-rear direction and the left-right direction. Moreover, the pack housings 11 may not be aligned to be rectilinear. For example, the pack housings 11 may be arranged to form a virtual circle when viewed in the up-down direction.
- each spinning pack 12 spins molten polymer out as filament f from each of the nozzles 14 of the spinneret 13.
- the spinning pack 12 spins molten polymer out as filament f from each of the nozzles 14 of the spinneret 13.
- one multi-filament yarn (yarn Y) which is formed of plural filaments f is spun out.
- monomer gas is generated as described above. The monomer gas is sucked and discharged by the exhaust unit 4.
- the yarn cooler 3 is an apparatus for cooling the filaments f which are spun out from the spinning packs 12.
- the yarn cooler 3 is provided below the spinning beam 2.
- the yarn cooler 3 includes members such as a box 20, cooling cylinders 21, and partitioning cylinders 22.
- the cylinders 21 and 22 are housed in the box 20.
- an internal space of the box 20 is partitioned into an upper space and a lower space by a flow adjustment plate 23.
- the flow adjustment plate 23 is a member which is formed of a material having flow adjustment capability such as punching metal.
- the flow adjustment plate 23 is provided horizontally.
- the cooling cylinders 21 are provided in the upper space of the box 20 (upper than the flow adjustment plate 23) and directly below the spinning packs 12.
- the cooling cylinders 21 are staggered along the left-right direction to correspond to the respective spinning packs 12 (as shown in FIG. 3 ).
- the wall of the cooling cylinder 21 is, in the same manner as the flow adjustment plate 23, formed of a material having flow adjustment capability such as punching metal, etc.
- the partitioning cylinders 22 are provided in the lower space of the box 20 (lower than the flow adjustment plate 23) and directly below the cooling cylinders 21, the partitioning cylinders 22 are provided.
- the wall of the partitioning cylinder 22 is, being different from the cooling cylinder 21, formed of an air-impermeable material.
- the filaments f pass through the internal space of the cooling cylinder 21 which is directly below the spinning pack 12 and the internal space of the partitioning cylinder 22 in order.
- a duct 25 is connected to a rear part of a lower portion of the box 20.
- air for cooling the filaments f is supplied by an unillustrated compressed air source.
- the air is supplied into the lower space of the box 20 through the duct 25.
- the cooling air which flows into the lower space of the box 20 is adjusted upward while passing through the flow adjustment plate 23 provided horizontally.
- the cooling air flows into the upper space of the box 20.
- the air which flows into the upper space of the box 20 is adjusted while passing through the wall of the cooling cylinder 21.
- the air flows into the cooling cylinder 21.
- the cooling cylinder 21 the air blows against the filaments f from the outside of the entire circumference of the cooling cylinder 21. Because of this, the filaments f are cooled.
- the wall of the partitioning cylinder 22 is air-impermeable, the air does not flow directly into the partitioning cylinder 22 from the lower space of the box 20.
- the exhaust unit 4 is provided between the spinning beam 2 and the yarn cooler 3 in the running direction of the filaments f.
- the exhaust unit 4 sucks and discharges monomer gas which is generated from molten polymer immediately after being spun out from the nozzles 14 of the spinneret 13. The details will be given later.
- an oil guide 5 is provided in order to apply oil to a yarn Y.
- the yarn Y having been cooled at the cooling cylinder 21 makes a contact.
- the oil guide 5 dispenses and applies oil to the yarn Y.
- the yarn Y to which oil is applied by the oil guide 5 is taken up by a take-up roller (unillustrated) which is provided below the oil guide 5.
- the yarn Y is sent to a winding device (unillustrated), and wound to a bobbin (unillustrated) at the winding device.
- FIG. 4 is a plan view of a suction member 31 described below and its surroundings.
- FIG. 5 is a cross section taken along a line V-V in FIG. 4 .
- FIG. 6 shows an aspirator 33 described below and its surroundings.
- the exhaust unit 4 sucks and discharges gas which includes monomer gas being generated from molten polymer immediately after being spun out (hereinafter, this gas will be simply referred to as gas).
- the exhaust unit 4 is provided with a waste channel 30 (as shown in FIG. 1 and FIG. 4 ) in order to suck and discharge the gas.
- the exhaust unit 4 includes two suction members 31 (sucking units of the present invention), two ducts 32 (duct units of the present invention), an aspirator 33 (exhaust device of the present invention), and a connecting pipe 34 (as shown in FIG. 6 ).
- one suction member 31 is provided to correspond to one spinning beam 2 (as shown in FIG. 1 ).
- a suction member 31a first sucking unit of the present invention
- a suction member 31b second sucking unit of the present invention
- each suction member 31 includes an enclosure member 41 and the sucking rings 42.
- the enclosure member 41 is a member which encloses the sucking rings 42 by being attached the sucking rings 42.
- the enclosure member 41 directs the gas which is discharged from the inside of the sucking rings 42 toward the aspirator 33 in the direction to which the gas is discharged (gas discharge direction).
- the enclosure member 41 is connected to the aspirator 33 through the duct 32.
- the enclosure member 41 is roughly flat as the entire shape.
- an internal space 46 is defined (as shown in FIG. 5 ).
- the internal space 46 is, except the part being provided with a suction port 52 described below, a space in which is substantially sealed from a space in which the melt spinning system 1 is provided.
- the enclosure member 41 includes an enclosure part 47 which encloses the sucking rings 42 and two passage parts 48 which are provided closer than the enclosure part 47 to the aspirator 33 in the gas discharge direction (as shown in FIG. 5 , the enclosure part 47 and two passage parts 48 are partitioned by a two-dot chain line 101).
- the enclosure part 47 is rectangular when viewed from above (as shown in FIG. 4 ).
- the enclosure part 47 is provided between the spinning beam 2 and the yarn cooler 3 in the up-down direction (as shown in FIG. 5 ).
- fitting holes 49 are provided so that the sucking rings 42 are fitted to the fitting holes 49, respectively.
- the fitting holes 49 are, corresponding to the spinnerets 13, staggered along the left-right direction.
- the two passage parts 48 are connected to the front end of the enclosure part 47.
- the two passage parts 48 are provided to be aligned in the left-right direction.
- Each of the two passage parts 48 has a roughly triangular shape when viewed from above.
- Each of the front end portions of the two passage parts 48 is connected to the duct 32.
- the sucking rings 42 are members for discharging the gas which is generated from the filaments f immediately after being spun out. As shown in FIG. 5 , each sucking ring 42 is provided between the spinning pack 12 and the cooling cylinder 21 in the up-down direction. Each sucking ring 42 is provided to surround the filaments f immediately after being spun out. The sucking rings 42 fit to the fitting holes 49 of the enclosure member 41, respectively. The sucking rings 42 are attached to be enclosed by the enclosure member 41. On the circumferential wall 51 of each sucking ring 42, along the circumferential direction of each sucking ring 42, the suction ports 52 are provided. Through the suction ports 52, a space inside the sucking ring 42 and the internal space 46 of the enclosure member 41 intercommunicate.
- the duct 32 connects the enclosure member 41 with the aspirator 33.
- the duct 32 is provided on the downstream of the enclosure member 41 in the gas discharge direction.
- the duct 32 is provided on the upstream of the aspirator 33 in the gas discharge direction.
- the duct 32 includes two upstream portions 61 and one downstream portion 62. To the two upstream portions 61, the front end portions (downstream end portions in the gas discharge direction) of the two passage parts 48 of the enclosure member 41 are attached, respectively.
- the two upstream portions 61 are merged with each other by being connected to an upstream end portion of the downstream portion 62.
- a downstream end portion of the downstream portion 62 in the gas discharge direction is connected to the aspirator 33.
- one duct 32 is provided to correspond to one suction member 31.
- a duct 32a first duct unit of the present invention
- a duct 32b second duct unit of the present invention
- the aspirator 33 is an apparatus for sucking and discharging the gas.
- the aspirator 33 is provided on the downstream of the suction member 31 and the duct 32 in the gas discharge direction.
- the aspirator 33 is, by an accompanied flow which is generated by water flowing in the aspirator 33, able to generate very low sucking pressure (for example, -5Pa).
- the aspirator 33 is able to discharge monomer gas by dissolving monomer gas into water.
- the aspirator 33 is able to change output by changing a condition of a flow amount of water flowing in the aspirator 33.
- the aspirator 33 includes a main body 71, a water inlet 72, two gas inlets 73, and an outlet 74.
- the main body 71 is a cylindrical part which extends in the up-down direction.
- the water inlet 72 is provided in order to allow water to flow in.
- two gas inlets 73 are provided in order to allow the gas to flow in.
- the outlet 74 is provided in order to allow the water and the gas to be discharged.
- the water inlet 72 is provided at the upper portion of the main body 71, and attached to a pipe 75 which is connected to an unillustrated water source.
- a water inflow port 76 (as shown in FIG. 7(a) ) is provided in order to allow water to flow in.
- the two gas inlets 73 are roughly cylindrical parts which are provided in both left and right side faces of the main body 71. At the two gas inlets 73, gas inflow ports 77 (as shown in FIG. 7(a) ) are provided in order to allow the gas to flow in, respectively.
- Each of the two gas inlets 73 is connected to the suction member 31 through the duct 32.
- a gas inlet 73a first gas inlet of the present invention
- a gas inlet 73b second gas inlet of the present invention
- the outlet 74 is provided at the lower portion of the main body 71, and connected to the connecting pipe 34. At the outlet 74, an outflow port 78 (as shown in FIG. 7(a) is provided in order to allow water and the gas to be discharged.
- the connecting pipe 34 is, in the gas discharge direction, provided on the downstream of the aspirator 33. To an upstream end portion of the connecting pipe 34 in the gas discharge direction, the outlet 74 of the aspirator 33 is attached. A downstream end portion of the connecting pipe 34 in the gas discharge direction is, in an extending direction of the fixed pipe 100, attached to an intermediate part of the fixed pipe 100.
- the waste channel 30 is formed of the suction member 31, the duct 32, the aspirator 33, and the connecting pipe 34 in order to allow the gas to be discharged.
- the gas which flows into the gas inlet 73 exits from the outlet 74 with water. Then, after passing through the connecting pipe 34, the gas flows into the fixed pipe 100. As a result, the gas is sucked and discharged by the exhaust unit 4.
- the internal space 46 which is defined by the enclosure member 41 is substantially sealed. Therefore, even though the negative pressure which is generated by the aspirator 33 is low, strong sucking force is generated in the vicinity of the suction port 52 of the sucking ring 42.
- the connecting pipe 34 is connected to an intermediate part of the fixed pipe 100.
- part of the gas may flow into the connecting pipe 34 from the fixed pipe 100 (see dashed line arrows in FIG. 6 ).
- a great deal of water flows into the fixed pipe 100.
- the great deal of water W (as shown in FIG. 6 ) flows into the fixed pipe 100, a strong accompanied flow may be generated.
- the negative pressure may be changed greatly on the upstream side in the gas discharge direction. Because of this, the airflow may be disturbed in the vicinity of the filaments f immediately after being spun out (as shown in FIG. 2 ). As a result, the filaments f may be shaken, and the quality of yarns may be deteriorated.
- inflow of gas into the connecting pipe 34 from the fixed pipe 100 must be suppressed.
- the flow amount of water which flows in the aspirator 33 may be increased so that an accompanied flow which flows from the connecting pipe 34 toward the fixed pipe 100 (i.e., toward the downstream side in the gas discharge direction) is augmented.
- the gas inflow into the connecting pipe 34 from the fixed pipe 100 is suppressed.
- the negative pressure in the space upstream of the aspirator 33 in the gas discharge direction may be increased, with the result that the discharge speed of the gas at around the filaments f may become excessive and the filaments f may be shaken significantly.
- the flow amount of the gas may be suppressed to be small.
- this method is disadvantageous in that the waste channel 30 of the gas is narrowed by the valve, and when monomer is solidified, the channel tends to be clogged.
- the exhaust unit 4 includes a structure described below for the purpose that, even when the output of the aspirator 33 is high (i.e., the flow amount of water is large), the discharge speed of the gas at around the filaments f is suppressed from being too high, without narrowing the waste channel 30 of the gas.
- the exhaust unit 4 includes an inflow suppressor 70 (as shown in FIGs. 7(a) and 7(b) ) in order to suppress the gas inflow into the connecting pipe 34 from the fixed pipe 100.
- the inflow suppressor 70 includes the aspirator 33 described above and an outside air intake 81 described below.
- FIG. 7(a) is a cross section of the aspirator 33. The cross section cuts the aspirator 33 at right angles in the front-rear direction.
- FIG. 7(b) is a perspective view of the gas inlet 73.
- FIG. 8 (a) is a front view of an aspirator 33 which includes an adjustment member 83 described below.
- FIG. 8(b) is a perspective view of the adjustment member 83.
- FIG. 9(a) is a view of the adjustment member, viewed along an arrow IXa in FIG. 8(b) .
- FIG. 9(b) shows a state of the adjustment member 83 after being moved from the state which is shown in the FIG. 9(a) .
- the adjustment member 83 is omitted.
- each gas inlet 73 of the aspirator 33 is provided with the outside air intake 81.
- the outside air intake 81 causes the waste channel 30 to communicate with space outside the waste channel 30 (an external space 82), and takes outside air (air) into the waste channel 30 from the external space 82.
- the outside air intake 81 is, e.g., along the circumferential direction of the gas inlet 73, formed as a slit to run an roughly halfway around the gas inlet 73.
- the outside air intake 81 opens, for example, upward. In this way, the outside air intake 81 causes the waste channel 30 to communicate with the external space 82.
- An outside air intake 81a (first outside air intake of the present invention) is provided to correspond to the gas inlet 73a.
- an outside air intake 81b (second outside air intake of the present invention) is provided to correspond to the gas inlet 73b.
- two outside air intakes 81a and two outside air intakes 81b are provided. The number of the outside air intakes 81 is not limited to this.
- the adjustment member 83 (adjustment unit of the present invention) is attached to each gas inlet 73.
- the adjustment member 83 is provided to adjust an opening degree of the outside air intake 81.
- An adjustment member 83a (first adjustment unit of the present invention) is provided to correspond to the outside air intake 81a.
- an adjustment member 83b (second adjustment unit of the present invention) is provided to correspond to the outside air intake 81b.
- the adjustment member 83 includes a cylindrical portion 84 (cover member of the present invention) and a handle 85.
- the cylindrical portion 84 is a cylindrical part which is provided to surround the part at which the outside air intake 81 of the gas inlet 73 is provided.
- the cylindrical portion 84 is, along the circumferential direction of the cylindrical portion 84, provided with a slit 86 which runs an roughly halfway around the cylindrical portion 84.
- the slit 86 is, in the direction in which the gas inlet 73 extends, provided roughly at the same place with the outside air intake 81.
- the cylindrical portion 84 is, along a plane which includes the periphery of the outside air intake 81 of the gas inlet 73 (i.e., a circumferential surface of the gas inlet 73), arranged to be rotatable (i.e., movable) in the circumferential direction of the cylindrical portion 84 (as indicated by an arrow in FIG. 8(b) ).
- the handle 85 is a protrusion part which protrudes outward in the radial direction of the cylindrical portion 84 from a part of the cylindrical portion 84 in the circumferential direction.
- the handle 85 has a size with which an operator can pinch the handle 85 by hand so that the operator can rotate the cylindrical portion 84 manually.
- the slit 86 of the cylindrical portion 84 is moved along the circumferential surface of the gas inlet 73.
- the opening degree of the outside air intake 81 is adjusted.
- the opening degree of the outside air intake 81 with which the slit 86 completely overlaps is twice as large as the opening degree of the outside air intake 81, a half of which overlaps with the slit 86 (see a hatched part in FIGs. 9(a) and 9(b) ).
- a pressure gauge 87 which detects pressure of the gas (as shown in FIG. 8(a) ) is provided.
- the adjustment member 83 As an operator moves the adjustment member 83 based on the detection result by the pressure gauge 87 so as to adjust the opening degree of the outside air intake 81, a flow amount of outside air which is taken in through the outside air intake 81 is finely adjusted at each gas inlet 73. With this, between the suction members 31 (as shown in FIG. 4 ), a variation of a flow rate in the vicinity of the suction port 52 (as shown in FIG. 5 ) is suppressed.
- the adjustment of the opening degree of the outside air intake 81 may be performed before the melt spinning system 1 is activated. In other words, when the melt spinning system 1 is in operation, the adjustment of the opening degree of the outside air intake 81 does not need to be performed at any time.
- the inflow suppressor 70 As described above, by the inflow suppressor 70, the gas inflow into the connecting pipe 34 from the fixed pipe 100 is suppressed. Therefore, airflow in the vicinity of the filaments f is suppressed from being disturbed.
- the outside air intake 81 is provided. Because of this, when the aspirator 33 is in operation, outside air can be taken into the waste channel 30 through the outside air intake 81. On this account, by merging the gas which flows in the waste channel 30 with the outside air, the sucking pressure (the negative pressure) can be decreased. Therefore, the flow rate of the gas which flows from the upstream of the outside air intake 81 in the gas discharge direction is decreased as compared to a case where the outside air intake 81 is not formed.
- the flow amount described above is adjustable by adjusting the opening degree of the outside air intake 81 by the adjustment member 83.
- the opening degree of the outside air intake 81 is adjusted. As described above, by a simple operation of moving the cylindrical portion 84, the opening degree of the outside air intake 81 is easily adjusted.
- the optimal flow amount of outside air which is taken in through the outside air intake 81 may be different between the exhaust units 4.
- providing the adjustment member 83 at each exhaust unit 4 is especially effective.
- the optimal flow amount of outside air which is taken in through the outside air intake 81 may be different between the gas inlets 73.
- providing the adjustment member 83a and the adjustment member 83b is especially effective.
- the outside air intake 81 is provided at the gas inlet 73 of the aspirator 33 to be far from the suction member 31. As a result, comparing with a case in which the outside air intake 81 is placed near the suction member 31, an airflow in the vicinity of the filaments f is suppressed from being disturbed, and the filaments f are suppressed from being easily shaken.
- the sucking ring 42 and the enclosure member 41 form the internal space 46 which is substantially sealed.
- the negative pressure which is generated by the aspirator 33 is weak, the gas is efficiently sucked into the internal space 46. Because of this, a small variation of the negative pressure may greatly change the suction quantity of the gas, with the result that the airflow may be disturbed and the filaments f may be shaken.
- the following arrangement is especially effective: the negative pressure in the vicinity of the filaments f is decreased and the discharge speed of the gas is prevented from becoming high by taking in outside air through the outside air intake 81.
- the aspirator 33 In a structure in which the aspirator 33 is used as an apparatus for discharging the gas, a great deal of water flows in the fixed pipe 100, and a strong accompanied flow may be generated. Therefore, in order to suppress the accompanied flow which flows into the connecting pipe 34 from the fixed pipe 100, an amount of water which flows in the aspirator 33 must be increased to augment the accompanied flow which flows into the fixed pipe 100 from the connecting pipe 34. In this case, the following arrangement is especially effective: the negative pressure in the vicinity of the filaments f is decreased and the discharge speed of the gas is prevented from becoming high by taking in outside air through the outside air intake 81.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
- The present invention relates to a melt spinning system.
- A melt spinning device recited in Patent Literature 1 (
DE102013012869A1 ) spins molten polymer out as filaments from a spinneret. The filaments spun out are cooled by cooling wind which is supplied through a cooling cylinder being provided below the spinneret. In this process, from the filaments immediately after being spun out, monomer gas is generated. Monomers are raw materials of polymer. When the gas is solidified and adheres to such as the spinneret or the cooling cylinder, etc., the quality of yarns may be deteriorated because the filaments are shaken by the disturbed cooling wind. In addition to that, problems such as yarn breakage or facility malfunction, etc., may happen. - Therefore, the melt spinning device described above is configured to be able to discharge the gas. To be more specific, between the spinneret and the cooling cylinder, a suction member which is formed suction ports in a wall surface and ring-shaped is provided. Typically, a melt spinning device includes an exhaust device which sucks and discharges gas through the suction ports by generating negative pressure. The gas which is sucked by the exhaust device passes through a connecting pipe connected with the exhaust device. Then, the gas flows toward the downstream side in the direction in which the gas is discharged (gas discharge direction).
- In a yarn production plant, typically, melt spinning devices each of which includes an exhaust device are provided to form one large melt spinning system. In addition to that, typically, connecting pipes each of which is connected with the exhaust device are provided to be merged with a fixed pipe which is fixedly provided in the production plant. In other words, the connecting pipe is connected to an intermediate part of the fixed pipe. In this case, for example, when airflow is disturbed at the junction of the fixed pipe and the connecting pipe, part of the gas may flow into the connecting pipe from the fixed pipe (i.e., to the upstream side in the gas discharge direction). Because of this, the pressure in a space on the upstream side in the gas discharge direction is changed. On this account, airflow is disturbed at around filaments immediately after being spun out, and the filaments are shaken. As a result, the quality of yarns may be deteriorated.
- An object of the present invention is to suppress airflow at around filaments from being disturbed.
- A melt spinning system according to a first aspect of the invention includes: a spinning unit which includes a spinneret for spinning out filaments; a cooling unit which includes a cooling cylinder provided below the spinneret, the cooling unit cooling the filaments which are spun out from the spinneret; and at least one exhaust unit which is provided between the spinning unit and the cooling unit in a running direction of the filaments, the at least one exhaust unit including a waste channel for sucking and discharging gas which is generated from the filaments, the at least one exhaust unit including: a sucking unit which is provided between the spinneret and the cooling cylinder and includes a suction port for sucking the gas; a duct unit which is provided downstream of the sucking unit in the gas discharge direction in which the gas is discharged; an exhaust device which is provided downstream of the duct unit in the gas discharge direction and sucks and discharges the gas; a connecting pipe which is connected to an intermediate part of a fixed pipe which is fixedly provided, the connecting pipe being provided downstream of the exhaust device in the gas discharge direction; and an inflow suppressor which suppresses inflow of the gas into the connecting pipe from the fixed pipe.
- In the present invention, the connecting pipe is connected to an intermediate part of the fixed pipe. In this case, when airflow is disturbed at the junction of the fixed pipe and the connecting pipe, part of the gas may flow backward into the connecting pipe from the fixed pipe. Because of this, airflow at around the filaments is disturbed on an upstream side in the gas discharge direction, and the filaments are easily shaken. As a result, the quality of yarns may be deteriorated, and yarn breakage may occur. In the present invention, the gas inflow into the connecting pipe from the fixed pipe is suppressed by the inflow suppressor. Therefore, airflow in the vicinity of the filaments is suppressed from being disturbed.
- According to a second aspect of the invention, in the melt spinning system of the first aspect, the exhaust device is configured to be able to change output and includes a gas inlet for allowing the gas to flow in, at least one of the gas inlet and the duct unit includes an outside air intake which connects the waste channel with a space outside the waste channel, and the inflow suppressor includes the exhaust device and the outside air intake.
- In the present invention, by increasing an output of the exhaust device, a flow amount of the gas flowing in the connecting pipe is increased, and the gas inflow into the connecting pipe from the fixed pipe is suppressed. Meanwhile, when the output of the exhaust device is augmented simply, the negative pressure of a space upstream of the exhaust device in the gas discharge direction may be increased, with the result that the discharge speed of the gas at around the filaments may become excessive and the airflow in the vicinity of the filaments may be easily disturbed. As a further step, for example, by providing a valve between the sucking unit and the exhaust device in the gas discharge direction in order to increase passage resistance, the flow amount of the gas on the upstream side may be decreased. However, this method is disadvantageous in that the waste channel of the gas is narrowed by the valve, and when monomer gas is solidified, the channel tends to be clogged.
- To solve this problem, in the present invention, at least one of the gas inlet and the duct unit is provided with an outside air intake. Because of this, when the exhaust device is in operation, outside air can be taken into the waste channel through the outside air intake. On this account, by merging the gas which flows in the waste channel with the outside air, the sucking pressure (the negative pressure) can be decreased. Therefore, the flow rate of the gas which flows from the upstream of the outside air intake in the gas discharge direction is decreased as compared to a case where the outside air intake is not formed. As a result, even when the output of the exhaust device is high, the discharge speed of the gas at around the filaments is suppressed from being too high and airflow in the vicinity of the filaments f is suppressed from being disturbed, without narrowing the waste channel of the gas.
- According to a third aspect of the invention, the melt spinning system of the second aspect is arranged such that the at least one exhaust unit further includes an adjustment unit for adjusting an opening degree of the outside air intake.
- In the present invention, when a flow amount of outside air which is taken in through the outside air intake needs to be adjusted, the flow amount is adjustable by adjusting the opening degree of the outside air intake by the adjustment unit.
- According to a fourth aspect of the invention, the melt spinning system of the third aspect is arranged such that the adjustment unit includes a cover member for covering a part of the outside air intake, and by being moved along a surface which includes a periphery of the outside air intake, the cover member is able to change an area of a part which covers the outside air intake.
- In the present invention, by a simple operation of moving the cover member along a surface which includes a periphery of the outside air intake, the opening degree of the outside air intake is easily adjusted.
- According to a fifth aspect of the invention, the melt spinning system of the third or fourth aspect includes two or more exhaust units.
- When the plural exhaust units are provided (i.e., plural connecting pipes are connected to a fixed pipe), the optimal flow amount of outside air which is taken in through the outside air intake may be different between the exhaust units. In this case, providing the adjustment unit at each exhaust unit as in the present invention is especially effective.
- According to a sixth aspect of the invention, the melt spinning system of any one of the third to fifth aspects further includes, as the spinning unit, a first spinning unit and a second spinning unit which is different from the first spinning unit, and the at least one exhaust unit further including: a first sucking unit corresponding to the first spinning unit and second sucking unit corresponding to the second spinning unit, as the sucking unit; a first duct unit corresponding to the first sucking unit and a second duct unit corresponding to the second sucking unit, as the duct unit, and the exhaust device further including: a first gas inlet corresponding to the first duct unit and a second gas inlet corresponding to the second duct unit, as the gas inlet unit, and a first outside air intake corresponding to the first duct unit and the first gas inlet and a second outside air intake corresponding to the second duct unit and the second gas inlet, as the outside air intake, and a first adjustment unit for adjusting an opening degree of the first outside air intake and a second adjustment unit for adjusting an opening degree of the second outside air intake being provided as the adjustment unit.
- In a structure in which the first gas inlet and the second gas inlet are provided for one exhaust device, the optimal flow amount of outside air which is taken in through the outside air intake may be different between the gas inlets. In the structure, providing the first adjustment unit and the second adjustment unit as the present invention is especially effective.
- According to a seventh aspect of the invention, the melt spinning system of any one of the second to sixth aspects is arranged such that the outside air intake is formed at the gas inlet of the exhaust device.
- When the outside air intake at which the gas being discharged and outside air are merged is provided in the vicinity of the sucking unit in the gas discharge direction, airflow in the vicinity of the suction port may be easily disturbed and the filaments may be easily shaken. In the present invention, the outside air intake is formed at the gas inlet of the exhaust device to be far from the sucking unit. Therefore, the airflow in the vicinity of the suction port is suppressed from being easily disturbed, with the result that the filaments are suppressed from being easily disturbed.
- According to an eighth aspect of the invention, the melt spinning system of any one of the first to the seventh aspects is arranged such that the inflow suppressor includes a wind shield member which is provided downstream of the connecting pipe in the gas discharge direction and provided to extend toward inside of the fixed pipe in order to prevent the gas in the fixed pipe from flowing into the connecting pipe.
- In the present invention, by the wind shield member which is provided to extend toward the inside of the fixed pipe, the gas in the fixed pipe is prevented from flowing into the connecting pipe. Therefore, without change of output of the exhaust device, or in addition to the change of the output of the exhaust device, the gas is prevented from flowing backward.
- According to a ninth aspect of the invention, the melt spinning system according to any one of the first to eighth aspects is arranged such that the gas is discharged from one side to the other side in an extending direction of the fixed pipe, and the wind shield member extends in an orthogonal direction which is orthogonal to the extending direction or is provided to lean to the other side in the extending direction relative to the orthogonal direction.
- In a structure in which the wind shield member leans to one side in the extending direction relative to the orthogonal direction, the gas hitting the wind shield member flows backward to one side in the extending direction and flows to the other side again, with the result that the gas hitting the wind shield member may flow into the connecting pipe. In the present invention, the gas hitting the wind shield member is suppressed from flowing backward to one side in the extending direction. Therefore, the gas inflow into the connecting pipe from the fixed pipe is effectively suppressed.
- According to a tenth aspect of the invention, the melt spinning system of any one of the first to ninth aspects is arranged such that the sucking unit includes: a sucking ring which is provided to surround the filaments being spun out from the spinneret and includes the suction port formed in a circumferential wall; and an enclosure member which is connected to the exhaust device, is provided to surround the sucking ring, and includes an internal space in which the gas discharged from inside of the sucking ring flows.
- In the present invention, the sucking ring and the enclosure member form an internal space which is substantially sealed. With this, even when the negative pressure which is generated by the exhaust device is weak, the gas is efficiently sucked into the internal space. Because of this, a small variation of the negative pressure may greatly change the flow rate of the gas, with the result that the airflow may be disturbed and the filaments may be shaken. In the structure, as in the present invention, the following arrangement is especially effective: the gas inflow is suppressed from flowing backward into the connecting pipe from the fixed pipe by the inflow suppressor.
- According to an eleventh aspect of the invention, the melt spinning system of any one of the first to tenth aspects is arranged such that the exhaust device is an aspirator which includes: a water inlet which is different from the gas inlet and allows water to flow in; and an outlet which is connected to the connecting pipe and allows the gas and the water to flow out.
- In a structure in which the aspirator is used as the exhaust device, the negative pressure is generated by an accompanied flow which is generated by water flowing in the aspirator, with the result that the gas is sucked. The aspirator has advantages that the aspirator is able to generate very low negative pressure by adjusting a flow amount of water and to discharge monomer by dissolving monomer into water.
- Meanwhile, into the fixed pipe, because water flows through the outlet and the connecting pipe, a strong accompanied flow may be generated by a great deal of water flowing in the fixed pipe. When such an accompanied flow flows backward into the connecting pipe from the fixed pipe, the negative pressure may be changed greatly on the upstream side in the gas discharge direction. Therefore, in order to suppress the accompanied flow which flows into the connecting pipe from the fixed pipe, an amount of water which flows in the aspirator must be increased to augment the accompanied flow which flows into the fixed pipe from the connecting pipe. Meanwhile, when the accompanied flow for sucking the gas is increased, the negative pressure may become excessive, with the result that the filaments may be shaken significantly. In the structure, as in the present invention, the following arrangement is especially effective: the gas inflow is suppressed from flowing backward into the connecting pipe from the fixed pipe by the inflow suppressor.
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FIG. 1 is a schematic representation of a melt spinning system related to the present embodiment. -
FIG. 2 is an enlarged view of a spinning beam and its surroundings. -
FIG. 3 is a cross section taken along a line III-III inFIG. 2 . -
FIG. 4 is a plan view of a sucking unit and its surroundings. -
FIG. 5 is a cross section taken along a line V-V inFIG. 4 . -
FIG. 6 shows an aspirator and its surroundings. -
FIGs. 7(a) and 7(b) show a detailed structure of the aspirator. -
FIGs. 8(a) and 8(b) show an adjustment member. -
FIGs. 9(a) and 9(b) show a change of the opening degree of a slit. -
FIG. 10 shows airflow at around a slit. -
FIG. 11 shows an exhaust unit related to a modification. -
FIG. 12 shows an exhaust unit related to another modification. - The following will describe an embodiment of the present invention. Directions shown in
FIG. 1 andFIG. 2 are defined as the front-rear, left-right, and up-down directions. - To begin with, the following will describe a schematic structure of a
melt spinning system 1 related to the present embodiment with reference toFIG. 1 to FIG. 3 .FIG. 1 is a schematic representation of themelt spinning system 1 related to the present embodiment.FIG. 2 is an enlarged view of aspinning beam 2 described below and its surroundings.FIG. 3 is a cross section taken along a line III-III inFIG. 2 . - As shown in
FIG. 1 , themelt spinning system 1 includes spinning beams 2 (spinning units of the present invention), yarn coolers 3 (cooling units of the present invention), andexhaust units 4. Eachspinning beam 2 spins out filaments f which are made of molten polymer. Theyarn cooler 3 which is provided to correspond to eachspinning beam 2 cools the filaments f spun out. Theexhaust unit 4 sucks and discharges monomer (raw materials of polymer) gas which is generated from the filaments f immediately after being spun out. In the present embodiment, corresponding to twospinning beams 2 and twoyarn coolers 3, oneexhaust unit 4 is provided. To be more specific, anexhaust unit 4a is provided to correspond to aspinning beam 2a (first spinning unit of the present invention), aspinning beam 2b (second spinning unit of the present invention) which is different from thespinning beam 2a, andyarn coolers exhaust unit 4b is provided to correspond to spinningbeams yarn coolers exhaust unit 4 is discharged through a fixedpipe 100 which is fixedly provided. - The
spinning beam 2 spins out yarns Y which are made of molten polymer. Molten polymer which is spun out in the present embodiment is, for example, nylon 6 (PA6). As shown inFIG. 2 , thespinning beam 2 includespack housings 11. To thepack housings 11, spinning packs 12 are attached, respectively. In the present embodiment, to twelvepack housings 11, twelve spinning packs 12 are attached, respectively. The pack housings 11 (spinning packs 12) are, for example, staggered to form two lines along the left-right direction. Each spinningpack 12 is supplied with molten polymer from an unillustrated pipe, etc. Thepack housings 11 are not necessarily arranged in this way. For example, thepack housings 11 may be, for example, aligned to form a line along the left-right direction. In addition to that, thepack housings 11 may be aligned to form three or more lines. Furthermore, when thepack housings 11 are arranged to form plural lines, thepack housings 11 may be staggered, or may be aligned in both the front-rear direction and the left-right direction. Moreover, thepack housings 11 may not be aligned to be rectilinear. For example, thepack housings 11 may be arranged to form a virtual circle when viewed in the up-down direction. - At the lower end portion of each spinning
pack 12, aspinneret 13 havingnozzles 14 is provided. The spinningpack 12 spins molten polymer out as filament f from each of thenozzles 14 of thespinneret 13. To put it differently, from onespinneret 13, one multi-filament yarn (yarn Y) which is formed of plural filaments f is spun out. In this process, from the filaments f immediately after being spun out, monomer gas is generated as described above. The monomer gas is sucked and discharged by theexhaust unit 4. - The
yarn cooler 3 is an apparatus for cooling the filaments f which are spun out from the spinning packs 12. Theyarn cooler 3 is provided below thespinning beam 2. As shown inFIG. 2 andFIG. 3 , theyarn cooler 3 includes members such as abox 20, coolingcylinders 21, andpartitioning cylinders 22. Thecylinders box 20. - As shown in
FIG. 2 , an internal space of thebox 20 is partitioned into an upper space and a lower space by aflow adjustment plate 23. Theflow adjustment plate 23 is a member which is formed of a material having flow adjustment capability such as punching metal. Theflow adjustment plate 23 is provided horizontally. In the upper space of the box 20 (upper than the flow adjustment plate 23) and directly below the spinning packs 12, the coolingcylinders 21 are provided. The coolingcylinders 21 are staggered along the left-right direction to correspond to the respective spinning packs 12 (as shown inFIG. 3 ). The wall of thecooling cylinder 21 is, in the same manner as theflow adjustment plate 23, formed of a material having flow adjustment capability such as punching metal, etc. In the lower space of the box 20 (lower than the flow adjustment plate 23) and directly below the coolingcylinders 21, thepartitioning cylinders 22 are provided. The wall of thepartitioning cylinder 22 is, being different from the coolingcylinder 21, formed of an air-impermeable material. The filaments f pass through the internal space of thecooling cylinder 21 which is directly below the spinningpack 12 and the internal space of thepartitioning cylinder 22 in order. - To a rear part of a lower portion of the
box 20, aduct 25 is connected. To theduct 25, air for cooling the filaments f is supplied by an unillustrated compressed air source. The air is supplied into the lower space of thebox 20 through theduct 25. The cooling air which flows into the lower space of thebox 20 is adjusted upward while passing through theflow adjustment plate 23 provided horizontally. Subsequently, the cooling air flows into the upper space of thebox 20. The air which flows into the upper space of thebox 20 is adjusted while passing through the wall of thecooling cylinder 21. Subsequently, the air flows into thecooling cylinder 21. As a result, in thecooling cylinder 21, the air blows against the filaments f from the outside of the entire circumference of thecooling cylinder 21. Because of this, the filaments f are cooled. In this regard, because the wall of thepartitioning cylinder 22 is air-impermeable, the air does not flow directly into thepartitioning cylinder 22 from the lower space of thebox 20. - The
exhaust unit 4 is provided between thespinning beam 2 and theyarn cooler 3 in the running direction of the filaments f. Theexhaust unit 4 sucks and discharges monomer gas which is generated from molten polymer immediately after being spun out from thenozzles 14 of thespinneret 13. The details will be given later. - Below the
cooling cylinder 21 and thepartitioning cylinder 22, anoil guide 5 is provided in order to apply oil to a yarn Y. With theoil guide 5, the yarn Y having been cooled at thecooling cylinder 21 makes a contact. At this stage, theoil guide 5 dispenses and applies oil to the yarn Y. The yarn Y to which oil is applied by theoil guide 5 is taken up by a take-up roller (unillustrated) which is provided below theoil guide 5. Subsequently, the yarn Y is sent to a winding device (unillustrated), and wound to a bobbin (unillustrated) at the winding device. - The structure of the
exhaust unit 4 will be described with reference toFIG. 4 to FIG. 6 .FIG. 4 is a plan view of asuction member 31 described below and its surroundings.FIG. 5 is a cross section taken along a line V-V inFIG. 4 .FIG. 6 shows anaspirator 33 described below and its surroundings. - The
exhaust unit 4 sucks and discharges gas which includes monomer gas being generated from molten polymer immediately after being spun out (hereinafter, this gas will be simply referred to as gas). In other words, theexhaust unit 4 is provided with a waste channel 30 (as shown inFIG. 1 andFIG. 4 ) in order to suck and discharge the gas. As shown inFIG. 4 to FIG. 6 , theexhaust unit 4 includes two suction members 31 (sucking units of the present invention), two ducts 32 (duct units of the present invention), an aspirator 33 (exhaust device of the present invention), and a connecting pipe 34 (as shown inFIG. 6 ). By means of negative pressure which is generated by water flowing in theaspirator 33, theexhaust unit 4 sucks the gas from spaces which are radially inside sucking rings 42 (described below) provided at thesuction member 31. By the same means, theexhaust unit 4 discharges the gas through theduct 32, theaspirator 33, and the connecting pipe 34 (see arrows inFIG. 4 ). In the present embodiment, onesuction member 31 is provided to correspond to one spinning beam 2 (as shown inFIG. 1 ). For example, asuction member 31a (first sucking unit of the present invention) is provided to correspond to thespinning beam 2a. In addition to that, asuction member 31b (second sucking unit of the present invention) is provided to correspond to thespinning beam 2b. - As shown in
FIG. 4 , eachsuction member 31 includes anenclosure member 41 and the sucking rings 42. Theenclosure member 41 is a member which encloses the suckingrings 42 by being attached the sucking rings 42. In addition to that, theenclosure member 41 directs the gas which is discharged from the inside of the suckingrings 42 toward theaspirator 33 in the direction to which the gas is discharged (gas discharge direction). Theenclosure member 41 is connected to theaspirator 33 through theduct 32. Theenclosure member 41 is roughly flat as the entire shape. In theenclosure member 41, by twoflat plates side wall 45 which connects outer peripheries of theflat plates internal space 46 is defined (as shown inFIG. 5 ). Theinternal space 46 is, except the part being provided with asuction port 52 described below, a space in which is substantially sealed from a space in which themelt spinning system 1 is provided. - The
enclosure member 41 includes anenclosure part 47 which encloses the suckingrings 42 and twopassage parts 48 which are provided closer than theenclosure part 47 to theaspirator 33 in the gas discharge direction (as shown inFIG. 5 , theenclosure part 47 and twopassage parts 48 are partitioned by a two-dot chain line 101). Theenclosure part 47 is rectangular when viewed from above (as shown inFIG. 4 ). Theenclosure part 47 is provided between thespinning beam 2 and theyarn cooler 3 in the up-down direction (as shown inFIG. 5 ). At theenclosure part 47,fitting holes 49 are provided so that the suckingrings 42 are fitted to the fitting holes 49, respectively. The fitting holes 49 are, corresponding to thespinnerets 13, staggered along the left-right direction. The twopassage parts 48 are connected to the front end of theenclosure part 47. The twopassage parts 48 are provided to be aligned in the left-right direction. Each of the twopassage parts 48 has a roughly triangular shape when viewed from above. Each of the front end portions of the twopassage parts 48 is connected to theduct 32. - The sucking rings 42 are members for discharging the gas which is generated from the filaments f immediately after being spun out. As shown in
FIG. 5 , each suckingring 42 is provided between the spinningpack 12 and thecooling cylinder 21 in the up-down direction. Each suckingring 42 is provided to surround the filaments f immediately after being spun out. The sucking rings 42 fit to the fitting holes 49 of theenclosure member 41, respectively. The sucking rings 42 are attached to be enclosed by theenclosure member 41. On thecircumferential wall 51 of each suckingring 42, along the circumferential direction of each suckingring 42, thesuction ports 52 are provided. Through thesuction ports 52, a space inside the suckingring 42 and theinternal space 46 of theenclosure member 41 intercommunicate. - The
duct 32 connects theenclosure member 41 with theaspirator 33. In other words, theduct 32 is provided on the downstream of theenclosure member 41 in the gas discharge direction. In addition to that, theduct 32 is provided on the upstream of theaspirator 33 in the gas discharge direction. Theduct 32 includes twoupstream portions 61 and onedownstream portion 62. To the twoupstream portions 61, the front end portions (downstream end portions in the gas discharge direction) of the twopassage parts 48 of theenclosure member 41 are attached, respectively. The twoupstream portions 61 are merged with each other by being connected to an upstream end portion of thedownstream portion 62. A downstream end portion of thedownstream portion 62 in the gas discharge direction is connected to theaspirator 33. In the present embodiment, oneduct 32 is provided to correspond to onesuction member 31. For example, as shown inFIG. 4 , aduct 32a (first duct unit of the present invention) is provided to correspond to thesuction member 31a. In addition to that, aduct 32b (second duct unit of the present invention) is provided to correspond to thesuction member 31b. - The
aspirator 33 is an apparatus for sucking and discharging the gas. Theaspirator 33 is provided on the downstream of thesuction member 31 and theduct 32 in the gas discharge direction. Theaspirator 33 is, by an accompanied flow which is generated by water flowing in theaspirator 33, able to generate very low sucking pressure (for example, -5Pa). Furthermore, theaspirator 33 is able to discharge monomer gas by dissolving monomer gas into water. Theaspirator 33 is able to change output by changing a condition of a flow amount of water flowing in theaspirator 33. As shown inFIG. 6 , theaspirator 33 includes amain body 71, awater inlet 72, twogas inlets 73, and anoutlet 74. - The
main body 71 is a cylindrical part which extends in the up-down direction. At an upper portion of themain body 71, thewater inlet 72 is provided in order to allow water to flow in. In both left and right side faces of themain body 71, twogas inlets 73 are provided in order to allow the gas to flow in. At a lower portion of themain body 71, theoutlet 74 is provided in order to allow the water and the gas to be discharged. - The
water inlet 72 is provided at the upper portion of themain body 71, and attached to apipe 75 which is connected to an unillustrated water source. At thewater inlet 72, a water inflow port 76 (as shown inFIG. 7(a) ) is provided in order to allow water to flow in. - The two
gas inlets 73 are roughly cylindrical parts which are provided in both left and right side faces of themain body 71. At the twogas inlets 73, gas inflow ports 77 (as shown inFIG. 7(a) ) are provided in order to allow the gas to flow in, respectively. Each of the twogas inlets 73 is connected to thesuction member 31 through theduct 32. For example, agas inlet 73a (first gas inlet of the present invention) is provided to correspond to theduct 32a. In addition to that, agas inlet 73b (second gas inlet of the present invention) is provided to correspond to theduct 32b. - The
outlet 74 is provided at the lower portion of themain body 71, and connected to the connectingpipe 34. At theoutlet 74, an outflow port 78 (as shown inFIG. 7(a) is provided in order to allow water and the gas to be discharged. - The connecting
pipe 34 is, in the gas discharge direction, provided on the downstream of theaspirator 33. To an upstream end portion of the connectingpipe 34 in the gas discharge direction, theoutlet 74 of theaspirator 33 is attached. A downstream end portion of the connectingpipe 34 in the gas discharge direction is, in an extending direction of the fixedpipe 100, attached to an intermediate part of the fixedpipe 100. - As described above, at the
exhaust unit 4, thewaste channel 30 is formed of thesuction member 31, theduct 32, theaspirator 33, and the connectingpipe 34 in order to allow the gas to be discharged. - In the
exhaust unit 4 having the structure described above, because water which enters from thewater inlet 72 of theaspirator 33 flows in the main body 71 (see two-dot chain line arrows inFIG. 6 ), a downward accompanied flow is generated. By the accompanied flow, the negative pressure is generated in the vicinity of thesuction port 52 of the sucking ring 42 (as shown inFIG. 4 ). As a result, the gas is sucked into the internal space 46 (as shown inFIG. 4 ) of theenclosure member 41 from the inside of the suckingring 42. Subsequently, the gas flows into thegas inlet 73 of theaspirator 33 through the inside of the duct 32 (see dashed line arrowsFIG. 6 ). The gas which flows into thegas inlet 73 exits from theoutlet 74 with water. Then, after passing through the connectingpipe 34, the gas flows into the fixedpipe 100. As a result, the gas is sucked and discharged by theexhaust unit 4. In this regard, as described above, theinternal space 46 which is defined by theenclosure member 41 is substantially sealed. Therefore, even though the negative pressure which is generated by theaspirator 33 is low, strong sucking force is generated in the vicinity of thesuction port 52 of the suckingring 42. - In this stage, as described above, the connecting
pipe 34 is connected to an intermediate part of the fixedpipe 100. In this case, for example, when airflow is disturbed at the junction of the fixedpipe 100 and the connectingpipe 34, part of the gas may flow into the connectingpipe 34 from the fixed pipe 100 (see dashed line arrows inFIG. 6 ). Especially, in a structure in whichplural aspirators 33 are provided, a great deal of water flows into the fixedpipe 100. Then, because the great deal of water W (as shown inFIG. 6 ) flows into the fixedpipe 100, a strong accompanied flow may be generated. When such an accompanied flow flows backward into the connectingpipe 34 from the fixedpipe 100, the negative pressure may be changed greatly on the upstream side in the gas discharge direction. Because of this, the airflow may be disturbed in the vicinity of the filaments f immediately after being spun out (as shown inFIG. 2 ). As a result, the filaments f may be shaken, and the quality of yarns may be deteriorated. - Therefore, inflow of gas into the connecting
pipe 34 from the fixedpipe 100 must be suppressed. For that reason, for example, the flow amount of water which flows in theaspirator 33 may be increased so that an accompanied flow which flows from the connectingpipe 34 toward the fixed pipe 100 (i.e., toward the downstream side in the gas discharge direction) is augmented. As a result, the gas inflow into the connectingpipe 34 from the fixedpipe 100 is suppressed. - Meanwhile, when the accompanied flow is augmented in this way, the negative pressure in the space upstream of the
aspirator 33 in the gas discharge direction may be increased, with the result that the discharge speed of the gas at around the filaments f may become excessive and the filaments f may be shaken significantly. As a further step, for example, by providing a valve between thesuction member 31 and theaspirator 33 in the gas discharge direction in order to increase passage resistance, the flow amount of the gas may be suppressed to be small. However, this method is disadvantageous in that thewaste channel 30 of the gas is narrowed by the valve, and when monomer is solidified, the channel tends to be clogged. Therefore, in the present embodiment, theexhaust unit 4 includes a structure described below for the purpose that, even when the output of theaspirator 33 is high (i.e., the flow amount of water is large), the discharge speed of the gas at around the filaments f is suppressed from being too high, without narrowing thewaste channel 30 of the gas. To be more specific, theexhaust unit 4 includes an inflow suppressor 70 (as shown inFIGs. 7(a) and 7(b) ) in order to suppress the gas inflow into the connectingpipe 34 from the fixedpipe 100. Theinflow suppressor 70 includes theaspirator 33 described above and anoutside air intake 81 described below. - The detailed structure of the
exhaust unit 4 will be described with reference toFIGs. 7(a) and 7(b) ,FIGs. 8(a) and 8(b) , andFIGs. 9(a) and 9(b) .FIG. 7(a) is a cross section of theaspirator 33. The cross section cuts theaspirator 33 at right angles in the front-rear direction.FIG. 7(b) is a perspective view of thegas inlet 73.FIG. 8 (a) is a front view of anaspirator 33 which includes anadjustment member 83 described below.FIG. 8(b) is a perspective view of theadjustment member 83.FIG. 9(a) is a view of the adjustment member, viewed along an arrow IXa inFIG. 8(b) .FIG. 9(b) shows a state of theadjustment member 83 after being moved from the state which is shown in theFIG. 9(a) . InFIGs. 7(a) and 7(b) , theadjustment member 83 is omitted. - As shown in
FIGs. 7(a) and 7(b) , eachgas inlet 73 of theaspirator 33 is provided with theoutside air intake 81. Theoutside air intake 81 causes thewaste channel 30 to communicate with space outside the waste channel 30 (an external space 82), and takes outside air (air) into thewaste channel 30 from theexternal space 82. Theoutside air intake 81 is, e.g., along the circumferential direction of thegas inlet 73, formed as a slit to run an roughly halfway around thegas inlet 73. Theoutside air intake 81 opens, for example, upward. In this way, theoutside air intake 81 causes thewaste channel 30 to communicate with theexternal space 82. Anoutside air intake 81a (first outside air intake of the present invention) is provided to correspond to thegas inlet 73a. In addition to that, anoutside air intake 81b (second outside air intake of the present invention) is provided to correspond to thegas inlet 73b. In the present embodiment, twooutside air intakes 81a and twooutside air intakes 81b are provided. The number of the outside air intakes 81 is not limited to this. - As shown in
FIGs. 8(a) and 8(b) , to eachgas inlet 73, the adjustment member 83 (adjustment unit of the present invention) is attached. Theadjustment member 83 is provided to adjust an opening degree of theoutside air intake 81. Anadjustment member 83a (first adjustment unit of the present invention) is provided to correspond to theoutside air intake 81a. In addition to that, anadjustment member 83b (second adjustment unit of the present invention) is provided to correspond to theoutside air intake 81b. Theadjustment member 83 includes a cylindrical portion 84 (cover member of the present invention) and ahandle 85. - The
cylindrical portion 84 is a cylindrical part which is provided to surround the part at which theoutside air intake 81 of thegas inlet 73 is provided. Thecylindrical portion 84 is, along the circumferential direction of thecylindrical portion 84, provided with aslit 86 which runs an roughly halfway around thecylindrical portion 84. Theslit 86 is, in the direction in which thegas inlet 73 extends, provided roughly at the same place with theoutside air intake 81. Thecylindrical portion 84 is, along a plane which includes the periphery of theoutside air intake 81 of the gas inlet 73 (i.e., a circumferential surface of the gas inlet 73), arranged to be rotatable (i.e., movable) in the circumferential direction of the cylindrical portion 84 (as indicated by an arrow inFIG. 8(b) ). - The
handle 85 is a protrusion part which protrudes outward in the radial direction of thecylindrical portion 84 from a part of thecylindrical portion 84 in the circumferential direction. Thehandle 85 has a size with which an operator can pinch thehandle 85 by hand so that the operator can rotate thecylindrical portion 84 manually. - As an operator pinches the
handle 85 by hand and rotates thecylindrical portion 84, theslit 86 of thecylindrical portion 84 is moved along the circumferential surface of thegas inlet 73. With this, by changing the positional relationship between theslit 86 and theoutside air intake 81, the opening degree of theoutside air intake 81 is adjusted. For example, the opening degree of theoutside air intake 81 with which theslit 86 completely overlaps (as shown inFIG. 9(a) ) is twice as large as the opening degree of theoutside air intake 81, a half of which overlaps with the slit 86 (see a hatched part inFIGs. 9(a) and 9(b) ). - In the vicinity of the
outside air intake 81 of thegas inlet 73, apressure gauge 87 which detects pressure of the gas (as shown inFIG. 8(a) ) is provided. - Referring to
FIG. 10 , the following will describe an airflow nearby theoutside air intake 81 of thegas inlet 73 in theexhaust unit 4 which includes theinflow suppressor 70 described above. - When water flows in the aspirator 33 (as indicated by two-dot chain line arrows in
FIG. 10 ), negative pressure is generated by an accompanied flow. As a result, the gas is sucked through the gas inlet 73 (as indicated by broken line arrows inFIG. 10 ). In this stage, as a flow amount of water is increased, the accompanied flow described above is augmented. The gas inflow into the connectingpipe 34 from the fixed pipe 100 (as shown inFIG. 6 ) is therefore suppressed. In addition to that, by the negative pressure described above, through theoutside air intake 81 which is provided at thegas inlet 73, outside air is taken into thegas inlet 73 from the external space 82 (as indicated by dashed line arrows inFIG. 10 ). Because of this, nearby theoutside air intake 81, the gas which flows in thewaste channel 30 and the outside air are merged. As a result, sucking pressure (the negative pressure) is decreased. Therefore, even though a flow amount of water which flows in theaspirator 33 is increased and the accompanied flow is augmented, the flow rate of the gas flowing from the upstream of theoutside air intake 81 in the gas discharge direction is small as compared to a case where theoutside air intake 81 is not formed. Consequently, at around the filaments f (as shown inFIG. 2 ) immediately after being spun out, increase in the discharge speed of the gas is suppressed. In this way, by theaspirator 33 and theoutside air intake 81, while the filaments f are suppressed from being easily shaken, the gas inflow into the connectingpipe 34 from the fixedpipe 100 is suppressed. - As an operator moves the
adjustment member 83 based on the detection result by thepressure gauge 87 so as to adjust the opening degree of theoutside air intake 81, a flow amount of outside air which is taken in through theoutside air intake 81 is finely adjusted at eachgas inlet 73. With this, between the suction members 31 (as shown inFIG. 4 ), a variation of a flow rate in the vicinity of the suction port 52 (as shown inFIG. 5 ) is suppressed. In this regard, the adjustment of the opening degree of theoutside air intake 81 may be performed before themelt spinning system 1 is activated. In other words, when themelt spinning system 1 is in operation, the adjustment of the opening degree of theoutside air intake 81 does not need to be performed at any time. - As described above, by the
inflow suppressor 70, the gas inflow into the connectingpipe 34 from the fixedpipe 100 is suppressed. Therefore, airflow in the vicinity of the filaments f is suppressed from being disturbed. - At the
gas inlet 73, theoutside air intake 81 is provided. Because of this, when theaspirator 33 is in operation, outside air can be taken into thewaste channel 30 through theoutside air intake 81. On this account, by merging the gas which flows in thewaste channel 30 with the outside air, the sucking pressure (the negative pressure) can be decreased. Therefore, the flow rate of the gas which flows from the upstream of theoutside air intake 81 in the gas discharge direction is decreased as compared to a case where theoutside air intake 81 is not formed. As a result, even when the output of theaspirator 33 is high (a flow amount of water is large), the discharge speed of the gas at around the filaments f is suppressed from being too high and airflow in the vicinity of the filaments f is suppressed from being disturbed, without narrowing thewaste channel 30 of the gas. - When a flow amount of outside air which is taken in through the
outside air intake 81 needs to be adjusted, the flow amount described above is adjustable by adjusting the opening degree of theoutside air intake 81 by theadjustment member 83. - As the
cylindrical portion 84 of theadjustment member 83 is rotated (moved) along the circumferential surface of thegas inlet 73, the opening degree of theoutside air intake 81 is adjusted. As described above, by a simple operation of moving thecylindrical portion 84, the opening degree of theoutside air intake 81 is easily adjusted. - In a structure in which
plural exhaust units 4 are provided (i.e., plural connectingpipes 34 are connected to the fixed pipe 100), the optimal flow amount of outside air which is taken in through theoutside air intake 81 may be different between theexhaust units 4. In this case, providing theadjustment member 83 at eachexhaust unit 4 is especially effective. - In a structure in which a
gas inlet 73a and agas inlet 73b are provided for oneaspirator 33, the optimal flow amount of outside air which is taken in through theoutside air intake 81 may be different between thegas inlets 73. In this case, providing theadjustment member 83a and theadjustment member 83b is especially effective. - The
outside air intake 81 is provided at thegas inlet 73 of theaspirator 33 to be far from thesuction member 31. As a result, comparing with a case in which theoutside air intake 81 is placed near thesuction member 31, an airflow in the vicinity of the filaments f is suppressed from being disturbed, and the filaments f are suppressed from being easily shaken. - In the present embodiment, the sucking
ring 42 and theenclosure member 41 form theinternal space 46 which is substantially sealed. With this, when the negative pressure which is generated by theaspirator 33 is weak, the gas is efficiently sucked into theinternal space 46. Because of this, a small variation of the negative pressure may greatly change the suction quantity of the gas, with the result that the airflow may be disturbed and the filaments f may be shaken. In this case, the following arrangement is especially effective: the negative pressure in the vicinity of the filaments f is decreased and the discharge speed of the gas is prevented from becoming high by taking in outside air through theoutside air intake 81. - In a structure in which the
aspirator 33 is used as an apparatus for discharging the gas, a great deal of water flows in the fixedpipe 100, and a strong accompanied flow may be generated. Therefore, in order to suppress the accompanied flow which flows into the connectingpipe 34 from the fixedpipe 100, an amount of water which flows in theaspirator 33 must be increased to augment the accompanied flow which flows into the fixedpipe 100 from the connectingpipe 34. In this case, the following arrangement is especially effective: the negative pressure in the vicinity of the filaments f is decreased and the discharge speed of the gas is prevented from becoming high by taking in outside air through theoutside air intake 81. - The following will describe modifications of the above-described embodiment. The members which are identical with those in the above-described embodiment will be denoted by the same reference numerals, and the explanations thereof are not repeated.
- (1) In the embodiment described above, the
outside air intake 81 extends as a slit along the circumferential direction of thegas inlet 73. However, the disclosure is not limited to this. Theoutside air intake 81 may, e.g., extend as a slit along the direction in which thegas inlet 73 extends. Alternatively, theoutside air intake 81 may be a round hole. In other words, theoutside air intake 81 may have any kind of shape. - (2) In the embodiment described above, the
cylindrical portion 84 of theadjustment member 83 is rotatable along the circumferential surface of thegas inlet 73. However, the disclosure is not limited to this. For example, thecylindrical portion 84 may be configured to be movable in the direction in which thegas inlet 73 extends. - (3) In the embodiment described above, by being moved along the circumferential surface of the
gas inlet 73, theadjustment member 83 changes the opening degree of theoutside air intake 81. However, the disclosure is not limited to this. For example, theadjustment member 83 may include an unillustrated slidable component which is able to slide relative to theslit 86. Furthermore, the opening degree of theoutside air intake 81 may be changed by changing the opening degree of theslit 86 by sliding the slidable component. - (4) In the embodiment described above, the
outside air intake 81 is provided at thegas inlet 73 of theaspirator 33, and theadjustment member 83 for adjusting the opening degree of theoutside air intake 81 is placed to surround thegas inlet 73. However, the disclosure is not limited to these arrangements. For example, as shown inFIG. 11 , anoutside air intake 92 may be provided at aduct 91. In addition to that, at agas inlet 94 of anaspirator 93, an outside air intake may not be provided. Furthermore, theadjustment member 83 may be placed to surround theduct 91. Alternatively, theoutside air intake 92 may be provided at each of thegas inlet 94 and theduct 91. Alternatively, the outside air intake may be provided at, e.g., thepassage part 48 of theenclosure member 41. In this case, thepassage part 48 is also equivalent to a duct unit of the present invention. In addition to that, theenclosure part 47 of theenclosure member 41 and suckingring 42 are equivalent to a sucking unit of the present invention. - (5) In the embodiment described above, the
melt spinning system 1 includesplural exhaust units 4. However, the disclosure is not limited to this. The number of theexhaust units 4 may be one. - (6) In the embodiment described above, the
aspirator 33 includes twogas inlets 73. However, the disclosure is not limited to this. In other words, the number of thegas inlets 73 included in oneaspirator 33 may be one or may be three or more. - (7) In the embodiment described above, the
exhaust unit 4 includes theadjustment member 83. However, the disclosure is not limited to this. Theadjustment member 83 is not necessarily provided. - (8) In the embodiment described above, the
inflow suppressor 70 includes theaspirator 33 and theoutside air intake 81. However, another component may function as an inflow suppressor. The following explanation is given with reference toFIG. 12 . To begin with, as shown inFIG. 12 , the gas in the fixedpipe 100 flows from a left side (one side of the present invention) to a right side (the other side of the present invention) in the extending direction of the fixed pipe 100 (the left-right direction). On the downstream of the connectingpipe 34 in the gas discharge direction, awind shield member 96 which extends to the inside of the fixedpipe 100 is provided. Thewind shield member 96 is a cylindrical member which is formed of, for example, a hose. Alternatively, thewind shield member 96 may be formed of a sheet metal. A shape of thewind shield member 96 is not necessarily cylindrical. For example, the shape of thewind shield member 96 may be semi-cylindrical. In other words, thewind shield member 96 may at least extend to the inside of the fixedpipe 100 from a lower left end portion of the connectingpipe 34. In this regard, thewind shield member 96 is, so that the gas in the fixedpipe 100 flows reliably to the extending direction, provided not to contact with water W which flows in the fixedpipe 100. By thewind shield member 96 described above, the gas in the fixedpipe 100 is guided downward (as indicated by dashed line arrows inFIG. 12 ), and hence the gas is suppressed from flowing into the connectingpipe 34. Thewind shield member 96 may extend, e.g., along the up-down direction (the orthogonal direction of the present invention) which is orthogonal to the left-right direction. Alternatively, thewind shield member 96 may be placed to lean rightward relative to the up-down direction (as shown inFIG. 12 ). With this, comparing with a structure in which thewind shield member 96 leans leftward relative to the up-down direction, the gas which hits thewind shield member 96 is less likely to flow backward to the left side and then flow rightward again. Therefore, the gas inflow into the connectingpipe 34 from the fixedpipe 100 is effectively suppressed.
In the structure described above, theoutside air intake 81 may be provided (as shown inFIG. 12 ), or may not be provided. In other words, besides theinflow suppressor 70, thewind shield member 96 may also suppress the gas inflow into the connectingpipe 34 from the fixedpipe 100. Alternatively, theoutside air intake 81 may not be provided, and only thewind shield member 96 may suppress the gas inflow into the connectingpipe 34 from the fixedpipe 100. In this case, it is not necessary to enhance the output of theaspirator 33. In other words, in this case, thewind shield member 96 is equivalent to the inflow suppressor of the present invention. - (9) In the embodiment described above, the
suction member 31 includes the suckingring 42 which is provided to surround the filaments f and theenclosure member 41 to which the suckingring 42 is attached. However, the disclosure is not limited to this. In other words, thesuction member 31 is not necessarily provided to surround the filaments f. - (10) In the embodiment described above, the
aspirator 33 is provided as the exhaust device. However, the disclosure is not limited to this. In addition to theaspirator 33, or instead of theaspirator 33, for example, a known blower, etc., may be provided. In this regard, when the blower is provided instead of theaspirator 33, water W does not flow in the fixed pipe 100 (in other words, in the fixedpipe 100, only gas flows by sucking of the blower). In the structure, as the embodiment described above, it is effective to suppress the gas inflow into the connectingpipe 34 from the fixedpipe 100. - (11) In the embodiment described above, the
spinning beam 2 spins nylon 6 out as polymer. However, the disclosure is not limited to this. The present invention can be applied to cases where polymer which is made of other kind of nylon or polyester, etc., is spun out, as a matter of course.
Claims (11)
- A melt spinning system (1) comprising:a spinning unit (2) which includes a spinneret (13) for spinning out filaments (f);a cooling unit (3) which includes a cooling cylinder (21) provided below the spinneret (13), the cooling unit (3) cooling the filaments (f) which are spun out from the spinneret (13); andat least one exhaust unit (4) which is provided between the spinning unit (2) and the cooling unit (3) in a running direction of the filaments (f), the at least one exhaust unit (4) including a waste channel (30) for sucking and discharging gas which is generated from the filaments (f),the at least one exhaust unit (4) including:a sucking unit (31) which is provided between the spinneret (13) and the cooling cylinder (21) and includes a suction port (52) for sucking the gas;a duct unit (32) which is provided downstream of the sucking unit (31) in a gas discharge direction in which the gas is discharged;an exhaust device (33) which is provided downstream of the duct unit (32) in the gas discharge direction and sucks and discharges the gas;a connecting pipe (34) which is connected to an intermediate part of a fixed pipe (100) which is fixedly provided, the connecting pipe (34) being provided downstream of the exhaust device (33) in the gas discharge direction; andan inflow suppressor (70) which suppresses inflow of the gas into the connecting pipe (34) from the fixed pipe (100) .
- The melt spinning system (1) according to claim 1, wherein, the exhaust device (33) is configured to be able to change output and includes a gas inlet (73) for allowing the gas to flow in,
at least one of the gas inlet (73) and the duct unit (32) includes an outside air intake (81) which connects the waste channel (30) with a space outside the waste channel (30), and
the inflow suppressor (70) includes the exhaust device (33) and the outside air intake (81). - The melt spinning system (1) according to claim 2, wherein, the at least one exhaust unit (4) further includes an adjustment unit (83) for adjusting an opening degree of the outside air intake (81).
- The melt spinning system (1) according to claim 3, wherein, the adjustment unit (83) includes
a cover member for covering a part of the outside air intake (81), and
by being moved along a surface which includes a periphery of the outside air intake (81), the cover member is able to change an area of a part which covers the outside air intake (81). - The melt spinning system (1) according to claim 3 or 4, comprising two or more exhaust units (4).
- The melt spinning system (1) according to any one of claims 3 to 5, further comprising, as the spinning unit (2), a first spinning unit (2a) and a second spinning unit (2b) which is different from the first spinning unit (2a), and
the at least one exhaust unit (4) including:a first sucking unit (31a) corresponding to the first spinning unit (2a) and a second sucking unit (31b) corresponding to the second spinning unit (2b), as the sucking unit (31);a first duct unit (32a) corresponding to the first sucking unit (31a) and a second duct unit (32b) corresponding to the second sucking unit (31b), as the duct unit (32), andthe exhaust device (33) further including: a first gas inlet (73a) corresponding to the first duct unit (32a) and a second gas inlet (73b) corresponding to the second duct unit (32b), as the gas inlet unit (73), anda first outside air intake (81a) corresponding to the first duct unit (32a) and the first gas inlet (73a) and a second outside air intake (81b) corresponding to the second duct unit (32b) and the second gas inlet (73b), as the outside air intake (81), anda first adjustment unit (83a) for adjusting an opening degree of the first outside air intake (81a) and a second adjustment unit (83b) for adjusting an opening degree of the second outside air intake (81b) being provided as the adjustment unit (83). - The melt spinning system (1) according to any one of claims 2 to 6, wherein, the outside air intake (81) is formed at the gas inlet (73) of the exhaust device (33).
- The melt spinning system (1) according to any one of claims 1 to 7, wherein, the inflow suppressor (70) includes
a wind shield member (96) which is provided downstream of the connecting pipe (34) in the gas discharge direction and provided to extend toward inside of the fixed pipe (100) in order to prevent the gas in the fixed pipe (100) from flowing into the connecting pipe (34). - The melt spinning system (1) according to claim 8, wherein, the gas is discharged from one side to the other side in an extending direction of the fixed pipe (100), and
the wind shield member (96)
extends in an orthogonal direction which is orthogonal to the extending direction or is placed to lean to the other side in the extending direction relative to the orthogonal direction. - The melt spinning system (1) according to any one of claims 1 to 9, wherein, the sucking unit(31) includes:a sucking ring (42) which is provided to surround the filaments (f) being spun out from the spinneret (13) and includes the suction port (52) formed in a circumferential wall; andan enclosure member (41) which is connected to the exhaust device (33), is provided to surround the sucking ring (42), and includes an internal space in which the gas discharged from inside of the sucking ring (42) flows.
- The melt spinning system (1) according to any one of claims 1 to 10, wherein, the exhaust device (33) is an aspirator (33) which includes:a water inlet (72) which is different from the gas inlet (73) and allows water to flow in; andan outlet (74) which is connected to the connecting pipe (34) and allows the gas and the water to flow out.
Applications Claiming Priority (1)
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JP2019081480A JP7256066B2 (en) | 2019-04-23 | 2019-04-23 | Melt spinning equipment |
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CN112411020B (en) * | 2020-11-24 | 2024-07-09 | 浙江熔聚装备科技有限公司 | Energy-saving device and non-woven fabric manufacturing equipment |
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DE102021000149A1 (en) | 2021-01-15 | 2022-07-21 | Oerlikon Textile Gmbh & Co. Kg | Device for melt spinning and cooling a freshly extruded filament sheet |
CN115029802A (en) * | 2022-05-13 | 2022-09-09 | 杭州青云新材料股份有限公司 | Preparation system and method based on low-plastic-deformation high-recovery coarse denier spandex |
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 |
Also Published As
Publication number | Publication date |
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CN111826729A (en) | 2020-10-27 |
JP7256066B2 (en) | 2023-04-11 |
JP2020176354A (en) | 2020-10-29 |
CN111826729B (en) | 2023-04-18 |
EP3730678B1 (en) | 2021-06-09 |
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