JP7681237B2 - Spinning Equipment - Google Patents

Description

This disclosure relates to a spinning device.

The electrospinning device (spinning device) disclosed in Patent Document 1 is a device that spins ultrafine fibers from a spinning solution and continuously forms a fiber aggregate made of ultrafine fibers. The storage tank of the electrospinning device is composed of a tube extending along an axis. The storage tank has multiple spinning holes spaced at regular intervals from each other in the direction along the axis.

JP 2020-084387 A

Conventional spinning devices have a problem in that the amount of spinning solution discharged from each spinning hole is not uniform, resulting in non-uniform basis weight of the fiber aggregate.
The present disclosure has been made in view of the above-mentioned circumstances, and has an object to make the basis weight of a fiber assembly uniform. The present disclosure can be realized in the following form.

A cylindrical nozzle head in which a spinning electrode is disposed and a spinning solution is filled, and a plurality of spinning holes are formed at predetermined intervals;
a collector electrode disposed at a location remote from the nozzle head;
a strip-shaped collection member disposed on the nozzle head side of the collector electrode,
A spinning apparatus in which a voltage is applied between the spinning electrode and the collector electrode, so that a jet of the charged spinning solution is sprayed toward the collector electrode and collected as a fiber aggregate by the collecting member,
The nozzle head is a plurality of nozzle heads,
The plurality of nozzle heads are arranged such that a longitudinal direction of each of the nozzle heads faces a width direction of the collection member and the nozzle heads are aligned in the width direction of the collection member.

According to this disclosure, it is possible to make the basis weight of the fiber aggregate uniform.

FIG. 1 is a schematic diagram of a spinning device according to the first embodiment. FIG. 2 is a partial configuration diagram of the spinning apparatus as seen from a different direction than that of FIG. FIG. 3 is a plan view of the nozzle head as viewed from the collection member side. FIG. 4 is a cross-sectional view of the nozzle head.

Here, a preferred example of the present disclosure is given.
A spinning device in which the nozzle heads arranged to be aligned in the width direction of the collection member are shifted by a predetermined interval from each other in the front-rear direction of the collection member.
A spinning apparatus in which, for each of the nozzle heads arranged in a line in the width direction of the collection member, a group of the nozzle heads arranged to cross the width direction of the collection member once is defined as one group, and there are a plurality of groups in total.
A spinning apparatus, wherein the nozzle heads are arranged in a staggered manner.
A spinning apparatus including supply units for supplying the spinning solution to both ends of the nozzle head.

<Embodiment 1>
In this embodiment, the present disclosure is applied to a spinning apparatus 10. Hereinafter, the spinning apparatus 10 of this embodiment will be described with reference to Figs. 1 to 4. Figs. 1 and 2 are diagrams showing a schematic configuration of the spinning apparatus 10. Fig. 3 is a diagram showing an example of the arrangement of the nozzle head 20 in the spinning apparatus 10. Fig. 4 is a cross-sectional view of the nozzle head 20.

(Configuration of spinning device)
1 and 2 is configured as an electrospinning device. The spinning device 10 is a device that spins ultrafine fibers from a spinning solution 31 and continuously forms a fiber aggregate 14 made of the ultrafine fibers, such as a nonwoven fabric.

The spinning solution 31 uses a resin material that forms ultrafine fibers as a solute, and this solute is dissolved or dispersed in a volatile solvent. As the solute, for example, synthetic resins such as polyacrylonitrile (PAN), polypropylene (PP), and polyethylene (PE) are used. As the solvent, for example, compounds such as N,N-dimethylacetamide (DMA), N,N-dimethylformamide (DMF), and tetrahydrofuran (THF) are used.

As shown in Figures 1 to 3, the spinning device 10 includes a nozzle head 20, a collector electrode 17, a collection member 11, tanks 41 and 45, pumps 43 and 47, and a power source 44.

The nozzle head 20 is a member for spraying the stored spinning solution 31 to the outside. When the spinning device 10 is operated, the inside of the nozzle head 20 is filled with the spinning solution 31. The nozzle head 20 is cylindrical and has a shape that is long in one direction (the Y-axis direction in each figure). The total length of the nozzle head 20 is, for example, 450 mm or more. There is no particular upper limit to the total length of the nozzle head 20, but it is, for example, 1200 mm or less.

The nozzle head 20 has a plurality of spinning holes 36 formed at a predetermined interval along the longitudinal direction of the nozzle head 20. The spinning holes 36 are holes for spraying the spinning liquid 31. The spinning holes 36 open to the side of the nozzle head 20. The longer the overall length of the nozzle head 20 and the greater the number of spinning holes 36, the greater the variation in pressure loss of the spinning liquid 31 toward each spinning hole 36. For this reason, the technology of the present disclosure is effective in suppressing the variation in pressure loss of the spinning liquid 31 toward each spinning hole 36. In addition, in each figure, the nozzle head 20 is depicted generally with the dimensions of each part of the nozzle head 20 and the number of spinning holes 36 changed.

As shown in FIG. 4, the nozzle head 20 includes a solution tank 30 and a spinning electrode (supply electrode) 50. The solution tank 30 is for storing the amount of spinning solution 31 required for spinning. The solution tank 30 is composed of a cylindrical tube that extends linearly along the central axis (axis line L1). The solution tank 30 is formed of, for example, a solvent-resistant resin. The solvent-resistant resin is, for example, a synthetic resin such as a fluororesin (PTFE).

The solution tank 30 includes an inner tube 32 and an outer tube 33. The outer tube 33 is a circular tube that extends linearly along the axis L1. The outer diameter of the outer tube 33 is, for example, 10 mm. The space between the outer peripheral surface of the inner tube 32 and the inner peripheral surface of the outer tube 33 is a storage space 35 in which the spinning solution 31 is stored. A spinning hole 36 is provided at the top of the outer tube 33.

The radiation hole 36 is circular in plan view. The diameter of the radiation hole 36 is preferably 0.5 mm to 2.0 mm, for example, 1.0 mm. The radiation hole 36 is provided at the highest part (top) of the upper part of the outer tube 33. The radiation holes 36 are provided at multiple locations spaced apart at regular intervals in the direction along the axis L1. The distance between adjacent radiation holes 36 is preferably 5 mm to 20 mm, for example, 10 mm. The distance between adjacent radiation holes 36 is the distance between the centers of each radiation hole 36. The multiple radiation holes 36 are arranged in a row along the axis L1.

The inner tube 32 is a tube that supplies the spinning solution 31 to the storage space 35. The inner tube 32 is a circular tube that extends linearly along the axis L1. The diameter of the inner tube 32 is smaller than the diameter of the outer tube 33. The inner tube 32 is inserted into the outer tube 33 so as to be coaxial with the outer tube 33 (coaxial with the axis L1).

A circular inner hole 37 is provided at the top of the inner tube 32. The inner hole 37 is a hole that supplies the spinning solution 31 from the inside of the inner tube 32 to the outside. The inner holes 37 are provided at multiple locations spaced apart at regular intervals (e.g., 10 mm intervals) in the direction along the axis L1. The multiple inner holes 37 are arranged in a row along the axis L1. The inner holes 37 are provided at positions that are included in the cut surface when the nozzle head 20 is cut on a plane that includes the spinning holes 36 and the axis L1.

As shown in FIG. 4, the nozzle head 20 has supply ports 61 and 62 at both ends, through which the spinning solution 31 is supplied. The supply ports 61 and 62 are openings through which the spinning solution 31 is supplied. Specifically, the supply ports 61 and 62 are provided in such a manner that both ends of the inner tube 32 protrude from both ends of the outer tube 33 and open toward both sides in the axial direction. Both ends of the outer tube 33 are blocked by disk-shaped members having through holes 34. The supply ports 61 and 62 are connected to the pipes 42 and 46, respectively. When connected to the supply ports 61 and 62, the pipes 42 and 46 extend along the axis L1 from the connection portion with the nozzle head 20. The connection mode of the pipes 42 and 46 is not particularly limited, but the pipe 42 is connected to the supply port 61 at one end in the Y-axis direction, and the pipe 46 of a system separate from the supply port 61 at one end is connected to the supply port 62 at the other end.

The spinning electrode 50 is formed of a conductive material such as a metal. The spinning electrode 50 is, for example, a stainless steel wire. The wire diameter of the spinning electrode 50 is, for example, 0.9 mm. As shown in FIG. 4, the spinning electrode 50 is composed of a wire (wire-shaped member) having a diameter smaller than the inner diameter of the inner tube 32. In the solution tank 30, the entire spinning electrode 50 is immersed in the spinning solution 31. That is, the entire outer surface of the spinning electrode 50 is in contact with the spinning solution 31 in the storage space 35.

The spinning electrode 50 has a spiral shape (coil shape) extending along the axis L1 of the solution tank 30 in the solution tank 30. The spinning electrode 50 is wound in a circular shape when viewed from the axis L1 direction. The length of the spinning electrode 50 is longer than the length of the central axis of the solution tank 30 (the length along the axis L1 between both ends of the solution tank 30). Therefore, the spinning electrode 50 can have a larger contact area with the spinning solution 31 than a configuration (linear configuration) having the same length as the length of the central axis of the solution tank 30 (the length along the axis L1 between both ends of the solution tank 30). In addition, the efficiency of imparting charge from the spinning electrode 50 to the spinning solution 31 can be improved. Although not shown, the spinning electrode 50 is connected to a wiring connected to the power source 44 via a through hole provided at one end of the outer tube 33 (the right end in FIG. 4), for example.

As shown in FIG. 4, the spinning hole 36 is provided in the solution tank 30 at a position including the top 51 (a position surrounding the top 51) that appears when the spinning electrode 50 is cut on a plane including the axis L1. For example, the top 51 appears when the spinning electrode 50 is cut on a plane that includes the axis L1 and is parallel to the vertical direction. Since the top 51 is exposed from the spinning hole 36, the spinning solution 31 in an electrically charged state is more easily sprayed directly from the spinning hole 36. In other words, the spinning solution 31 is more easily sprayed in an electrically charged state.

As shown in FIG. 1, the collector electrode 17 is disposed between the delivery roller 12 and the take-up roller 15. The collector electrode 17 is formed of a conductive material such as metal. The collector electrode 17 is formed in a flat plate shape extending in the width direction of the collection member 11 (left and right direction in FIG. 2). The collector electrode 17 is in contact with or close to the upper surface of the collection member 11. The collection member 11 is disposed along the surface of the collector electrode 17 on the spinning electrode 50 (see FIG. 4) side (nozzle head 20 side).

The collection member 11 is in the form of a strip and is disposed on the nozzle head 20 side of the collector electrode 17. In the collection member 11, the direction perpendicular to the width direction (Y-axis direction in each figure) (X-axis direction in each figure) is the front-rear direction. The collection member 11 is formed of a flexible material, for example, a collection cloth such as a nonwoven fabric. The collection member 11 is wound around the delivery roller 12 to form a roll 13. The collection member 11 is horizontally positioned between the delivery roller 12 and the take-up roller 15, and while being sent in the X-axis direction, a fiber aggregate 14 is layered on the lower surface. The collection member 11 with the fiber aggregate 14 layered thereon is taken up by the take-up roller 15 to form a roll 16. When the fiber aggregate 14 is used, the collection member 11 with the layered fiber aggregate 14 is pulled out from the roll 16, and the fiber aggregate 14 is peeled off from the collection member 11.

As shown in FIG. 3, the spinning solution 31 is stored inside the tanks 41 and 45. The tank 41 and the solution tank 30 are connected by a pipe 42. The tank 45 and the solution tank 30 are connected by a pipe 46.

The pumps 43 and 47 are disposed midway along the pipes 42 and 46, and supply the spinning solution 31 in the tanks 41 and 45 into the solution tank 30. The pumps 43 and 47 are, for example, plunger pumps, and are capable of adjusting the flow rate of the spinning solution 31. The pumps 43 and 47 are adjusted so that the flow rate of the spinning solution 31 at the supply port 61 and the flow rate of the spinning solution 31 at the supply port 62 in one nozzle head 20 are approximately uniform. The pumps 43 and 47 correspond to a supply unit that supplies the spinning solution 31 to both ends of the nozzle head 20.

The power supply 44 is composed of a DC power supply. The positive electrode of the power supply 44 is connected to the spinning electrode 50, and the negative electrode is connected to the collector electrode 17.

Next, the arrangement of the nozzle heads 20 will be described. FIG. 3 is a plan view of the nozzle heads 20 as seen from the side of the collection member 11. The Y-axis direction in FIG. 3 corresponds to the width direction of the collection member 11. The spinning device 10 is equipped with multiple nozzle heads 20.

The multiple nozzle heads 20 are arranged with the longitudinal direction of each nozzle head 20 facing the width direction of the collection member 11. The multiple nozzle heads 20 are arranged in a plane that is approximately parallel to the collection member 11. The multiple nozzle heads 20 are arranged below the collection member 11 with the spinning holes 36 facing upward. The multiple nozzle heads 20 are attached to the stage 21 to form a unit 22.

The nozzle heads 20 are arranged so that each nozzle head 20 is aligned in the width direction of the collection member 11. The spinning device 10 is configured so that one nozzle head is not arranged to cross the width direction of the collection member 11 once, but rather a set of nozzle heads divided into multiple parts is arranged to cross the width direction of the collection member 11 once. In FIG. 3, a set of nozzle heads 20 arranged to cross the width direction of the collection member 11 once is referred to as nozzle head groups 20A, 20B, 20C, and 20D. For each nozzle head 20 arranged to be aligned in the width direction of the collection member 11, if a set of nozzle heads 20 arranged to cross the width direction of the collection member 11 once is taken as one set, there are multiple sets in total. In this embodiment, there are four nozzle head groups 20A to 20D. Each nozzle head group 20A to 20D is arranged at approximately equal intervals in the front-rear direction of the collection member 11.

The nozzle heads 20 are arranged on both sides of the widthwise center of the collection member 11. Specifically, four of the eight nozzle heads 20 are arranged on one side of the widthwise center of the collection member 11 (upper side in FIG. 3). Four of the eight nozzle heads 20 are arranged on the other side of the widthwise center of the collection member 11 (lower side in FIG. 3). With this configuration, when the fiber aggregate 14 is folded at the widthwise center, the area of the fiber aggregate 14 that overlaps with the gap between the upper nozzle head 20 in FIG. 3 and the lower nozzle head 20 in FIG. 3 and is likely to cause unevenness in basis weight can be set as the folding position.

The nozzle heads 20 arranged in a line in the width direction of the collection member 11 are arranged at a predetermined interval in the front-rear direction (X-axis direction) of the collection member 11. The interval at which each nozzle head 20 is offset in the X-axis direction is not particularly limited, but is, for example, equal to or greater than the outer diameter of the nozzle head 20 and equal to or less than 30 mm. The multiple nozzle heads 20 are arranged in a staggered manner. Specifically, the nozzle head 20 arranged on the upper side of FIG. 3 and the nozzle head 20 arranged on the lower side of FIG. 3 are arranged in a staggered manner.

(Method for producing fiber assembly)
A method for producing a fiber aggregate 14 will be described with reference to Figures 1 and 2. The spinning device 10 is operated, and the collecting member 11 is sent from the delivery roller 12 to the take-up roller 15 at a constant speed while being in contact with or close to the lower surface of the collector electrode 17. The pumps 43 and 47 are also operated to supply the spinning solution 31 to both ends of the nozzle head 20. Specifically, the spinning solution 31 in the tanks 41 and 45 is supplied from the supply ports 61 and 62 into the inner tube 32 as shown by the arrows in Figure 4. The spinning solution 31 supplied into the inner tube 32 flows into the storage space 35 from the inner hole 37 of the inner tube 32 and fills the storage space 35. As a result, the spinning solution 31 is uniformly applied to the spinning electrode 50.

Furthermore, a voltage is applied between the spinning electrode 50 and the collector electrode 17. In detail, the spinning electrode 50 is set as a positive electrode, and the collector electrode 17 is set as a negative electrode, and a voltage is applied between the two electrodes from the power source 44. As a result, the entire spinning solution 31 in the solution tank 30 is positively charged. The spinning solution 31 is charged so that the charge distribution around the spinning electrode 50 is uniform in the circumferential direction.

The spinning solution 31 is sprayed from each of the multiple spinning holes 36 in the nozzle head 20. Electric charges are induced and accumulated on the surface of the spinning solution 31 exposed in the spinning holes 36. These charges repel each other, and this repulsive force opposes the surface tension of the spinning solution 31. The spinning solution 31 is attracted by an electrostatic force (Coulomb force) acting along the electric field lines toward the collector electrode 17. When the electrostatic force overcomes the surface tension of the spinning solution 31, the charged spinning solution 31 begins to spray from the multiple spinning holes 36. Then, jets 38 of the charged spinning solution 31 are sprayed simultaneously from the multiple spinning holes 36 toward the collector electrode 17.

In this embodiment, the nozzle head 20 is reciprocated in the longitudinal direction of the nozzle head 20 (the direction of the hollow arrow in FIG. 3) while the spinning solution 31 is sprayed from the multiple spinning holes 36. The width of the reciprocating movement is preferably 100% to 200% of the spacing between the multiple spinning holes 36, for example, 10 mm to 20 mm. By reciprocating the entire unit 22 in the direction of the hollow arrow in FIG. 3, the multiple nozzle heads 20 can be reciprocated in the same manner.

The fibers sprayed toward the collector electrode 17 are split and collected as a fiber aggregate 14 by the collection member 11. Because the surface area of each jet 38 is large compared to its volume, the solvent in the jet 38 evaporates efficiently. This evaporation also reduces the volume of the jet, increasing the charge density. This increases the repulsive force of the charged spinning solution 31, causing each jet 38 to split into even thinner jets. Through this process, ultrafine fibers are spun, and a fiber aggregate 14 made of ultrafine fibers is collected on the lower surface of the collection member 11.

(Action and Effect)
Next, the effects of this embodiment will be described. In the spinning device 10 of this embodiment, the multiple nozzle heads 20 are arranged so that the longitudinal direction of each nozzle head 20 faces the width direction of the collection member 11 and the nozzle heads 20 are aligned in the width direction of the collection member 11. With this configuration, the discharge amount for each spinning hole 36 can be made uniform compared to a configuration in which one nozzle head is arranged to cross the width direction of the collection member 11 once. Therefore, the basis weight of the fiber aggregate 14 can be made uniform.

The following is a detailed explanation based on a demonstration experiment. First, a nozzle head of a comparative example was prepared by arranging one nozzle head in the width direction of the collection member 11, so that the collection member 11 could be crossed once. Next, two nozzle heads 20 were arranged in the width direction of the collection member 11, so that the collection member 11 could be crossed once. The length of the nozzle head 20 of the embodiment was about half the length of the nozzle head of the comparative example. The spinning solution 31 was supplied to both ends of the nozzle head of the comparative example and the nozzle head 20 of the embodiment, and the discharge amount of the spinning solution 31 from each spinning hole 36 was measured. The supply amount of the spinning solution 31 was adjusted so that it was an amount suitable for spinning when the discharge amount from each spinning hole 36 was averaged. In both the nozzle head of the comparative example and the nozzle head 20 of the embodiment, the discharge amount from the spinning hole 36 located at the end side was the largest, and the discharge amount from the spinning hole 36 located in the center was the smallest. The difference between the maximum and minimum values of the discharge amount of the spinning solution 31 in the nozzle head 20 of the embodiment was smaller than the difference between the maximum and minimum values of the discharge amount of the spinning solution 31 in the nozzle head of the comparative example. In this way, it was found that the discharge amount for each spinning hole 36 can be made uniform by arranging each nozzle head 20 so that they are aligned in the width direction of the collection member 11. This is presumably because the variation in the pressure loss of the spinning solution 31 toward each spinning hole 36 can be suppressed by shortening the nozzle head 20.

In the spinning device 10 of this embodiment, the nozzle heads 20 are arranged in a line in the width direction of the collection member 11, and are arranged at a predetermined interval in the front-rear direction of the collection member 11. Furthermore, the multiple nozzle heads 20 are arranged in a staggered manner. With this configuration, the nozzle heads 20 arranged in the width direction of the collection member 11 are less likely to interfere with each other. In addition, the pipes 42, 46, etc. connected to the nozzle heads 20 can be easily handled.

In the spinning device 10 of this embodiment, there are multiple sets of nozzle heads 20 arranged in a line in the width direction of the collection member 11, with each set being a collection of nozzle heads 20 arranged to cross the width direction of the collection member 11 once. With this configuration, the fibers spun by each set of nozzle heads 20 are stacked, thereby suppressing unevenness in the joints of the fiber aggregate 14.

The spinning device 10 of this embodiment is equipped with pumps 43, 47 that supply the spinning liquid 31 to both ends of the nozzle head 20. Therefore, the discharge amount for each spinning hole 36 can be made more uniform compared to a configuration in which the spinning liquid 31 is supplied from only one end of the nozzle head.

<Other embodiments>
The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope.
(1) The nozzle unit may be in a shape other than a cylindrical shape, such as a rectangular tube. The number and arrangement of the nozzle heads can also be changed as appropriate. For example, only one nozzle head may be arranged in the X-axis direction in FIG. 3. Three or more nozzle heads may be arranged in the Y-axis direction in FIG. 3.
(2) In a configuration in which a plurality of nozzle heads are arranged in the Y-axis direction, each nozzle head may be arranged as follows. For the nozzle heads adjacent to each other in the Y-axis direction in FIG. 3, the distance between the radiation holes located at the most opposite sides may be approximately the same as the distance between the radiation holes in each nozzle head in the Y-axis direction. According to this configuration, in the fiber aggregate, unevenness in the basis weight of the spun fiber aggregate is unlikely to occur at the portion overlapping the gap between the nozzle heads adjacent to each other in the Y-axis direction. In addition, the nozzle heads adjacent to each other in the Y-axis direction may have partially overlapping solution tanks in the X-axis direction as long as the radiation holes do not overlap each other in the X-axis direction. In addition, the nozzle heads adjacent to each other in the Y-axis direction do not need to be shifted in the X-axis direction as long as the piping and the like can be handled. That is, the nozzle heads adjacent to each other in the Y-axis direction may be arranged with their positions in the X-axis direction aligned.
(3) The plurality of radiation holes may be arranged in a zigzag pattern on both sides of the axis L1. The pitch of the radiation holes may not be constant. The pitch of the spiral shape of the spinning electrode may not be constant, but it is preferable that it is consistent with the pitch of the radiation holes. The size, position, and pitch of the holes in the inner tube can also be changed as appropriate.
(4) The shape, size, and position of the supply port can be changed as appropriate. The supply port may be open on the side surface of the nozzle head at both ends of the nozzle head. The spinning solution may be supplied from one pump to each of the supply ports provided at both ends of the nozzle head. The supply port may be provided only on one end side of the nozzle head.
(5) The storage space between the inner tube and the outer tube may be filled with a porous body. With this configuration, the porous body acts as a resistance to the flow of the spinning solution from the inner hole of the inner tube toward the spinning hole of the outer tube. Therefore, the variation in pressure loss of the spinning solution toward each spinning hole can be suppressed.
(6) In the spinning method, the nozzle head does not need to be moved back and forth when the spinning solution is sprayed from each of the multiple spinning holes.

The foregoing examples are merely illustrative and are not to be construed as limiting the invention. While the invention has been described with reference to exemplary embodiments, it is understood that the words used in describing and illustrating the invention are descriptive and exemplary rather than limiting. As detailed herein, changes may be made within the scope of the appended claims without departing from the scope or spirit of the invention in its form. While the detailed description of the invention has referred to specific structures, materials and embodiments, it is not intended that the invention be limited to those disclosed herein, but rather that the invention extends to all functionally equivalent structures, methods and uses within the scope of the appended claims.

REFERENCE SIGNS LIST 10: Spinning device 11: Collection member 14: Fiber assembly 17: Collector electrode 20: Nozzle head 31: Spinning liquid 36: Spinning hole 43, 47: Pump (supply section)
50...spinning electrode 61, 62...supply port

Claims (4)

A cylindrical nozzle head in which a spinning electrode is disposed and a spinning solution is filled, and a plurality of spinning holes are formed at predetermined intervals;
a collector electrode disposed at a location remote from the nozzle head;
a strip-shaped collection member disposed on the nozzle head side of the collector electrode,
A spinning apparatus in which a voltage is applied between the spinning electrode and the collector electrode, so that a jet of the charged spinning solution is sprayed toward the collector electrode and collected as a fiber aggregate by the collecting member,
The nozzle head is a plurality of nozzle heads,
the plurality of nozzle heads are arranged such that a longitudinal direction of each of the nozzle heads is oriented in a width direction of the collection member and the nozzle heads are aligned in the width direction of the collection member ,
A spinning apparatus comprising a supply unit for supplying the spinning solution to both end sides of the nozzle head . The spinning device according to claim 1, wherein the nozzle heads arranged in a line in the width direction of the collection member are offset by a predetermined distance in the front-rear direction of the collection member. The spinning device according to claim 1 or 2, wherein, for each of the nozzle heads arranged in a line in the width direction of the collection member, when a group of the nozzle heads arranged to cross the width direction of the collection member once is defined as one group, there are a plurality of groups in total. The spinning device according to any one of claims 1 to 3, wherein the nozzle heads are arranged in a staggered manner.

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