WO2003078718A1

WO2003078718A1 - Needle blade roll for quasi-cotton producing device

Info

Publication number: WO2003078718A1
Application number: PCT/JP2003/003385
Authority: WO
Inventors: Tokumatsu Ohto; Katsutoshi Yamamoto; Isao Ohgami
Original assignee: Daikin Industries, Ltd.
Priority date: 2002-03-20
Filing date: 2003-03-19
Publication date: 2003-09-25
Also published as: CN1643203A; US20050153820A1; EP1486603A1; CN100381627C; EP1486603A4; JP2003278071A

Abstract

A needle blade roll (12) comprising a roll main body (13), and a number of needle blades (14) set in the peripheral surface of the roll main body for forming short fibers from a raw material that can be formed into quasi-cotton by a quasi-cotton producing device, wherein the needle blades (14) are inclined such that their front ends are positioned forwardly of the direction of rotation of the roll main body (13) with respect to the radial line. This makes it possible to produce quasi-cotton in which short fibers are longer than in the prior art, the short fibers being fully intertwined with each other.

Description

Itoda 針 Needle blade for artificial cotton production equipment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle blade needle for forming pseudo fibers from a material capable of forming pseudo cotton in a pseudo cotton manufacturing apparatus for manufacturing pseudo cotton by accumulating a large number of short fibers. Background art

Conventionally, as shown in Fig. 11, this kind of artificial cotton production equipment has been used to produce a large number (innumerable) of short fibers with a fiber length of 1 to 20 Omm from a fiber material (101) such as yarn or sliver. (102) is formed, and the short fibers (102) are run by running the belt (103) and the like while accumulating on a stacking surface member such as a mesh belt (103) and an interleaf paper (not shown). In addition, it is configured to continuously produce pseudo cotton (see, for example, Japanese Patent Application Laid-Open No. 9-93277). The fiber material (101) may be any material that can form pseudo cotton, and various materials including synthetic resin are used.

In the artificial cotton manufacturing apparatus (100), as a means for forming short fibers (102) from the fiber material (101), a large number of needle blades (105) are generally implanted on the outer peripheral surface of the roll body (104). A needle blade roll (106) is used. The needle blade roll (106) is mounted in a cylindrical casing (107) in which a supply port of the fiber material (101) and a discharge port of the short fiber (102) are formed separately in the circumferential direction. The casing (107) has an exhaust outlet opening in a wind tunnel (108) to be taken in from below. Further, a mesh belt (103) and a feeding mechanism (not shown) are arranged below the wind tunnel (108).

In this device (100), the needle blade (106) is rotated at a high speed while feeding the fiber material (101) through a slight gap between the needle blade roll (106) and the casing (107). A number of short fibers (102) are formed and dispersed in the wind tunnel (108). The short fibers (102) dispersed in the wind tunnel (108) are entangled with each other and accumulated on the conveyor belt (10 ³ ) to produce pseudo cotton. One solution—

By the way, in the conventional needle blade roll (106), the needle blade (105) is arranged along the radial direction on the circumferential surface of the roll body (104), or the tip rotates with respect to the radial direction. It is inclined so as to be located rearward in the direction. In other words, the needle blade (105) is arranged at right angles to the circumferential surface of the roll body (104) or inclined backward.

However, when the conventional needle blade roll (106) configured as described above is used, the short fiber (102) formed from the fiber material (101) tends to be too short. For this reason, when many short fibers (102) are accumulated on the upper surface of the mesh belt (103) or the like, there is a possibility that the short fibers (102) may not easily become entangled with each other. The reason that the short fibers (102) are shortened in the above configuration is that the needle blades (105) are sufficiently bitten into the fiber material (101) while the material (101) is subdivided to form long short fibers (102). This is probably because the biting is insufficient and the cutting action of the needle blade (105) on the fiber material (101) in the casing (107) becomes stronger.

The present invention has been made in view of such a problem, and an object of the present invention is to improve a needle blade roll so that short fibers can be formed longer than in the past, whereby the short fibers Is to be able to produce pseudo cotton entangled with + minutes. Disclosure of the invention

In the present invention, the needle blade (14) of the needle blade roll is inclined forward in the rotation direction with respect to the circumferential surface of the roll body (13).

Specifically, the invention according to claim 1 forms a large number of short fibers (3) having a fiber length of l mm or more and 200 mm or less from a raw material (2) capable of forming pseudo cotton, and In a pseudo cotton producing apparatus (1) for producing pseudo cotton by accumulating fibers (3), a cylindrical casing (11) is formed so as to form a large number of the short fibers (3) from the raw material (2). It is assumed that the needle blade roll is rotatably mounted in parentheses.

The needle blade roll includes a roll body (13) and a large number of needle blades (14) implanted on a peripheral surface thereof, and the needle blade (14) is adapted to a diameter of the roll body (13). On the other hand, the tip should be inclined so that it is located forward of the roll body (13) in the rotation direction. 3 Features.

According to the first aspect of the present invention, when the material (2) is fed through a gap between the needle blade roll and the casing (11), a large number of short-circuits can be obtained by rotating the needle blade roll at high speed. Fibers (3) are formed. In addition, pseudo cotton is produced by dispersing the short fibers (3) in, for example, a wind tunnel and accumulating them on a conveyor belt while entangled.

Since the tip of the needle blade (14) is inclined with respect to the diameter line of the roll body (13) such that the tip is located forward in the rotation direction of the roll body (13), the needle blade with respect to the material (2) is rotated. The biting time of (14) becomes sufficient, the cutting action is weakened, and the tendency that the short fibers (3) formed from the material (2) become too short is eliminated. As a result, the short fibers (3) are formed to have a longer dimension than before, and when a large number of short fibers (3) are accumulated to produce pseudo cotton, the short fibers (3) are sufficiently entangled with each other. Occurs.

The invention according to claim 2 is the needle blade roll according to claim 1, wherein the inclination angle 0 of the needle blade (14) with respect to the diameter line of the roll body (13) is 5 ° ≤ 0 ≤ 30. It is characterized in that the needle blade (14) is implanted in the roll body (13) so as to fall within the range described above. In the invention according to claim 2, when the inclination angle of the needle blade (14) with respect to the diameter line of the roll body (13) is smaller than 0 force S5 °, the needle blade (14) with respect to the material (2) is While the cutting action is strengthened and the short fibers (3) tend to be shortened, the cutting action is weakened, whereas if the angle 0 is larger than 30 °, the needle blade roll tends to idle. The idling does not occur.

According to a third aspect of the present invention, in the needle blade roll according to the first or second aspect, the needle blade (14) is spirally arranged on the peripheral surface of the roll body (13). It is characterized by

According to the third aspect of the present invention, by arranging the needle blades (14) in a spiral shape, the phase of each needle blade (14) is shifted with respect to the feed direction of the material (2). Thus, the action of subdividing the material (2) into the short fibers (3) occurs uniformly throughout the needle blade roll.

The invention according to claim 4 is the needle blade roll according to claim 1 or 2, wherein the tip of the needle blade (14) of the mouth body (13) and the inner peripheral surface of the casing (11) are provided. Gap C is 5 It is characterized in that 0 μm ≤ C ≤ 500 μm.

In the invention of claim 4, if the gap C becomes smaller than the lower limit of the above range, the fiber may be clogged and the needle blade needle (12) may stop, whereas this possibility is reduced. If the gap C is larger than the upper limit of the above-mentioned range, the needle blade roll (12) is likely to idle, but does not occur.

Further, the inventions according to claims 5 to 11 respectively specify the material of the material (2).

Specifically, the invention according to claim 5 is the invention according to claim 1, wherein the material (2) capable of forming the pseudo cotton of the pseudo cotton manufacturing device (1) is made of synthetic resin, yarn, or sliver. It is characterized by being composed of at least one selected species. That is, the material (2) may be one of these three materials, or may be a combination of two or more.

The invention according to claim 6 is characterized in that, in the invention according to claim 1, the material (2) capable of forming the pseudo-cotton of the pseudo-cotton manufacturing apparatus (1) is a synthetic resin. The invention according to claim 7 is the invention according to claim 5 or 6, characterized in that the synthetic resin is composed of a fluororesin.

Further, in the invention according to claim 8, in the invention according to claim 7, the fluororesin is composed of a polytetrafluoroethylene and / or an ethylene-tetrafluoroethylene-based copolymer. It is characterized by.

The invention according to claim 9 is the invention according to claim 8, wherein the polytetrafluoroethylene and / or the ethylene-tetrafluoroethylene copolymer is constituted by a uniaxially stretched product. .

The invention according to claim 10 is characterized in that, in the invention according to claim 5, the yarn is made of glass fiber or carbon fiber.

Further, the invention according to claim 11 is characterized in that, in the invention according to claim 5, the sliver is composed of aramide, polyimide, wool, and natural fibers.

One effect one

According to the invention described in claim 1, the needle blade (14) of the needle blade roll is connected to the roll body (13). The material (2) that can form pseudo-cotton is formed between the needle blade and the casing (11) by inclining forward in the rotation direction with respect to the radial direction on the circumferential surface. When the material is fed through the gap C, the biting of the needle blade (14) to the material (2) becomes sufficient, and the short fibers (3) are formed with a longer dimension than before. Therefore, when a large number of short fibers (3) are accumulated to produce a pseudo cotton, the short fibers (3) are sufficiently entangled with each other, so that the strength of the pseudo cotton can be increased.

According to the invention of claim 2, the inclination angle 0 of the needle blade (14) with respect to the diameter line of the needle blade roll is 5. The needle blade (14) is implanted in the roll body (13) so that the range is ≤ S ≤ 30 °. Therefore, if the angle 6 is smaller than 5 °, the bite of the needle blade (14) against the material (2) is weak and the fiber tends to be short, and if 0 is larger than 30 °, the needle blade roll is set. However, such a problem can be prevented.

According to the third aspect of the present invention, since the needle blades () are spirally arranged, the phases of the needle blades (14) are shifted with respect to the feed direction of the material (2). Therefore, the subdivision performed by the needle blade (14) on the material (2) can be made more uniform. According to the invention of claim 4, the gap between the tip of the needle blade (14) of the roll body (13) and the inner peripheral surface of the casing (11) is 50 / m≤C50. When the gap C is smaller than the lower limit of the range, the fiber may be clogged and the needle blade roll (12) may stop, but the risk is reduced. If the gap C is larger than the upper limit of the above range, the needle blade roll (12) is likely to idle, but it is possible to prevent the idle rotation. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing the overall configuration of a pseudo cotton manufacturing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is an axial cross-sectional view of the roll unit.

FIG. 3 is a cross-sectional view perpendicular to the axis of the roll unit.

FIG. 4 is a partially enlarged cross-sectional view of the needle blade roll.

FIG. 5 is an external view of the needle blade roll.

Figure 6 is an enlarged sectional view of the wind tunnel and its surroundings. T JP03 / 03385

6 FIG. 7 is a sectional view taken along the line VII-VII of FIG.

FIG. 8 is a diagram showing the air flow in the upper part of the wind tunnel.

FIG. 9 is an enlarged view of a wind tunnel and its peripheral portion in a first modification of the first embodiment.

FIG. 10 is a diagram showing the air flow in the upper part of the wind tunnel in the second modification of the first embodiment.

FIG. 11 is a schematic structural diagram of a conventional artificial cotton manufacturing apparatus. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Overall configuration>

FIG. 1 is a perspective view showing the overall configuration of the artificial cotton manufacturing apparatus (1). This device (1) forms a large number (innumerable) of short fibers (3) from a material capable of forming pseudo cotton (hereinafter referred to as a fiber material) (2), and converts the short fibers (3) into a slip paper (20). ) Is run on the paper substrate while accumulating on a paper base material called), so that pseudo cotton is continuously produced.

This artificial cotton manufacturing device (1) is a staple unit (10) that forms a large number of short fibers (3) from a fiber material (2), and the short fibers (3) are accumulated below a roll unit (10). (20) as a stacking surface member, a wind tunnel (30) that communicates from the roll unit (10) to above the interleaf (20), and is sucked from below the interleaf (20). ) Is continuously provided in the direction of the plane. In addition, the artificial cotton manufacturing apparatus (10) includes, as other components, a material supply mechanism (50) for supplying the fiber material (2) to the roll unit (10), and a forcing below the interleaf paper (20). It has an exhaust mechanism (60) for taking in air from the wind tunnel (30) by exhaust air, and a winding mechanism (70) for manufactured pseudo cotton.

Material supply mechanism>

The material supply mechanism (50) supplies the fiber material (2) formed into a yarn or a sliver to the staple unit (10). The material supply mechanism (50) includes a plurality of pobins (51) on which the fiber material (2) is wound and a guide roll for guiding the plurality of fiber materials (2) to a roll tub (10). (52, 53) and up and down so as to sandwich these fiber materials (2) (54, 55). The nip rolls (54, 55) are configured to be pressed against each other, and perform an operation of pushing the fiber material (2) into the mouth unit (10) by being rotationally driven.

As the fiber material (2), at least one selected from synthetic resin, yarn, and sliver can be used. Among them, a fluororesin can be used as the synthetic resin, and polytetrafluoroethylene (PTFE) and / or an ethylene-tetrafluoroethylene copolymer (ETFE) is used as the fluororesin. be able to. The PTFE and / or ETFE can be composed of a uniaxially stretched product. The thickness of the fiber material (2) is about 30 / m.

As the fiber material (2), all may be PTFE fibers, or some may be PTFE fibers and the rest may be other fibers. That is, the bobbins (51) of the PTFE fiber and the bobbins (51) of other fibers may be used in combination. In addition, ethylene-tetrafluoroethylene copolymer (ETFE) fiber may be used instead of PTFE fiber. In that case, all fiber materials may be ETFE fiber, or some of the fiber material may be used. ETFE fibers may be used, and the rest may be other fibers.

Examples of the other fibers include yarns made of glass fibers or carbon fibers, aramide, polyimide, wool, and slivers made of natural fibers. Of these, natural fibers are used as slivers.For cotton and wool, one fiber is less than 10 cm at most, and the fibers are lightly twisted in the same direction so that they can be handled continuously. This is because it is treated as a bundle of slivers (slivers). In addition, aramido polyimide is used as a sliver because it has the highest strength among synthetic fibers, so it is necessary to cut it into short fibers of about 50 mm in advance and finish it as a sliver. This is because it is preferable for reducing the load on the steel and for uniform stirring. On the other hand, industrial fibers such as glass fiber and carbon fiber are supplied to the device as continuous yarn.

In addition, the above-mentioned other fibers will be described in more detail including the above-mentioned examples. One or two types of inorganic fibers, heat-resistant synthetic fibers, polyolefin-based fibers, polyester-based fibers, or natural fibers can be used. These can be mixed and used. Among them, examples of the inorganic fibers include the carbon fibers and glass fibers, metal fibers, asbestos, and rock wool. Examples of the metal fiber include stainless steel fiber, copper fiber, and steel fiber.

Examples of the heat-resistant synthetic fiber include, for example, polyphenylene sulfide (PPS) fiber, the polyimide (PI) fiber, the aramide fiber (para-based aramide fiber, meta-based aramide fiber), and phenol-based fiber. , Polyarylate fibers, carbonized fibers, or fluorine-containing resin fibers. Examples of the fluorinated resin fiber include tetrafluoroethylene-perfluoro (alkylbutyl ether) copolymer (PFA) fiber, tetrafluoroethylene-hexafluoropropylene copolymer (FEP) fiber, Polyvinyl fluoride (PVF) fiber, polyvinylidene-denfluoride (PV dF) fiber, polychlorinated trifluoroethylene (PCTFE) fiber, or ethylene monochlorinated trifluoroethylene copolymer (ECTFE) fiber Can be.

Furthermore, examples of the polyolefin-based fibers include polyethylene fibers, polypropylene fibers, nylon fibers, and urethane fibers. Examples of the polyester-based fibers include polyethylene terephthalate fibers and polybutylene terephthalate fibers. Further, examples of the natural fibers include yarn, cotton, cashmere, angora, silk, hemp, pulp and the like.

<Mouth-to-knowledge>

The roll cut (10) forms a cylindrical casing (11) and a short fiber (3) as shown in FIG. 2 which is an axial sectional view and FIG. 3 which is a sectional view perpendicular to the axis. And a needle blade (12) housed in the casing (11) as a needle member. In the casing (11), a supply port (11a) for the fiber material (2) and a discharge port (lib) for the short fiber (3) are formed separately in the circumferential direction. The needle blade roll (12) includes a roll body (13) and a number of needle blades (14) implanted on the peripheral surface thereof. ) Are dimensioned so as to form a minute gap with the inner peripheral surface of the). The roll unit (10) subdivides the fiber material (2) supplied from the supply port (11a) by rotation of the needle blade roll ² ) to form short fibers ( ³ ), and the discharge port (11). l ib) To be discharged. The needle blade (14) is omitted in FIG. 2 and only a part is shown in FIG.

The casing (11) is provided with an upper casing (11c) and a lower casing (Lid), and the upper casing (11c) and the lower casing (11d) are respectively provided on the upper side of one cylindrical tube. It constitutes the part and the lower part. In addition, the supply port (11a) is formed on the left side of FIG. 3 and the discharge port (lib) is formed on the right side of the cylindrical tube.

The roll body (13) of the needle blade roll (12) includes an outer cylinder (13a) and an inner cylinder (13b), a shaft (13c) that is a central axis of the rotation, an outer cylinder (13a) and an inner cylinder. (13b) and an annular plate (13d) for connecting the shaft (13c), and these are integrated to form a roll body (13).

Bearing plates (11e, llf) are attached to both ends of the upper casing (11c) and the lower casing (11d). Each bearing plate (lie, llf) has a ball bearing (15, 15) fitted with the shaft (13c) and rotatably supporting the needle blade needle (12). I have. The bearing plates (l le, l lf) are equipped with retainers (16a, 16b) for retaining the ball bearings (15, 15). A bearing nut (17) is attached to the shaft (13c) on the assembly side (left side in the figure) of the roll unit (10). A pulley (18) is attached to one end of the shaft (13c), and the needle blade roll (12) is rotated by belt driving.

The needle blade (14) of the needle blade roll (12) is implanted in the outer cylinder (13a) of the roll body (13) as shown in detail in FIG. The needle blade (14) is inclined forward with respect to the diameter line of the roll body (13) such that the tip is located forward in the rotation direction of the roll body (13). Specifically, the inclination angle の of the needle blade (14) with respect to the diameter line of the roll body (13) is in a range of 5 ° ≤ 0 ≤ 30 °, and is preferably set to θ == 20 °. . The lower limit of the angle range is determined because the needle blade () becomes less likely to bite into the fiber when the inclination angle is smaller than the lower limit, and the upper limit is set when the inclination angle is larger than that. 12) is determined based on the fact that the casing (11) 內 is idle.

The needle blades (14) are equally spaced at a pitch of 4 ° in the circumferential direction of the roll body (13). That is, the needle blade (14) is arranged at a position on the circumference of the roll body (13) that is equally divided by 90. Further, the needle blade (14) is shown in FIG. As described above, they are continuously arranged in a spiral shape at a predetermined fine helix angle β on the peripheral surface of the roll body (13).

The inner cylinder (13b) is formed of an iron tube. The needle blade ⁴ ) is made of a steel material. Furthermore, a brass tube is used for the outer cylinder (13a) as a material that satisfies the workability and difficulty of implanting the needle blade (14).

The needle blade (14) has, for example, a base with a diameter of 0.9 mm, a total length of 9 mm, and a thin conical shape as shown in FIG. 4 or a cylindrical shape (not shown) with a sharp tip only. Things are used. The needle blade roll (12) is formed, for example, to have a diameter of 10 Omm and an axial length of 20 Omm at the tip of the needle blade (14). The outer diameter of the outer cylinder (13a) is, for example, 93 mm, and the protrusion of the needle blade (14) in the radial direction of the needle blade roll (12) is set to 3.5 mm.

And, with respect to the needle blade roll (12) having such dimensions, the casing (11) has a gap formed between its inner peripheral surface and the tip of the needle blade (14) as C (FIG. 4), 50 m ≤ C ≤ 500 / im, preferably C = 200 m. The lower limit of the above range is determined because if the gap C becomes smaller than this, there is a possibility that the fiber may be clogged and the needle blade roll (12) may stop, and the upper limit is larger than the gap C. And the needle blade roll (12) are idle.

In the above configuration, assuming that the radius of the outer cylinder (13a) is R and the protrusion of the needle blade (14) is L, L ZR = 3.5 / 46.5 = 0.075, but the protrusion L May be changed in the range of 2.0 to 5.0, and LZR may be set in the range of 2.0 / 46.5 ≤ L / R ≤ 5.0 / 46.5. This is because if the LZR is smaller than the lower limit of the above range, the needle blade knurl (12) will idle and crumble in the casing (11), and if it is larger than the upper limit, the needle blade (14) may be broken. It is.

The needle blade roll (12) has a rotation speed of 5000 to: L 0000 min- ¹ . By rotating the needle blade roll (12) having the above-described dimensions in the casing (U) at such a high speed, the wire diameter is about 12 μm on average from the fiber material (2). A number of short fibers (3) having a length of about 16 mm are formed.

The above dimensional configuration and the like are merely examples, and may be appropriately changed according to the device configuration and the like. It is possible. In addition, the short fibers (3) may be formed to have different fiber lengths depending on the wire diameter and the material, etc., and the fiber length may be generally in the range of 1 to 20 mm.

In this embodiment, an interleaf paper (20) is used as an accumulation surface member for accumulating the short fibers (3) discharged from the discharge port (lib) of the casing (11) below the roll unit (10). ing. The interleaf paper (20) is a breathable paper base material that is supplied from the interleaf roll (21) to the device (1), and is used as a winding mechanism after producing pseudo cotton on its surface. Collected on the take-up roll (70).

In this embodiment, the take-up roll (70) is configured as a drive roll, the interleaf roll (21) is configured as a driven roll, and between the interleaf roll (21) and the take-up roll (70), A plurality of Ep-rolls (41) are provided on the upper surface side, and a traveling guide conveyor (43) is provided on the lower surface side by an endless mesh belt (42). A feed mechanism (40) for causing the feed is provided.

In the example shown in the figure, five nip rolls (41) are arranged so as to be in pressure contact with each other. These nip rolls (41) are turned upside down along the surface of the four nip rolls (41) from the bottom to the interleaf paper (20) 1 on which a large number of short fibers (3) are accumulated. It is configured to pass between the nip rolls (41) in order from the bottom. The slip sheet that has passed through the top roll (41) is recovered by the take-up roll (70) via the guide rolls (4, 5). -The traveling guide conveyor (43) is configured to continuously rotate the endless mesh velvet (42) on the track by five rollers (44). Of the five rollers (44), for example, one is a drive roller, three are driven rollers, and the other is a tensioned roller. The travel guide Dokonbea (4 ³⁾ is an endless Messi Yuberuto (42) is configured to guide the interleaf sheet (20) while traveling at the same speed as the interleaf sheet (20).

FIG. 6 is an enlarged cross-sectional view of the wind tunnel (30) and its surroundings, and FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. In FIG. 6, the traveling guide conveyor (43) is simplified. The wind tunnel (30) and the exhaust mechanism (60) are disposed vertically above and below the interleaf paper (20) and the nestless mesh belt (42), and substantially communicate with each other. The wind tunnel (30) consists of a front plate (30a) located on the side of the slip sheet (20), a back plate (30b) facing the front plate (30a), and a front plate (30a) and a back plate (30b). The cross section is formed almost rectangular from the side plates (30c, 30d) connected to the ends (FIG. 1 omits the front side plate (30d)). The exhaust mechanism (60) has a duct (61) whose upper end has an opening shape facing the lower end of the wind tunnel (30), and is forced out of the wind tunnel (30) by an exhaust fan (not shown). Inhales and creates a downward airflow in the wind tunnel (30).

At the lower end of the wind tunnel (30), rollers (31a, 31b) that rotate in contact with the slip sheet (20) are provided on the front plate (30a) side and the back plate (30b) side. The roller (31a) on the front panel (30a) has a function to prevent outside air from entering the wind tunnel (30), and the roller (31b) on the rear panel (30b) prevents outside air from entering. In addition, it has the function of pressing the accumulated short fibers (3) on the slip paper (20). A rectifying grid (62) is provided in an opening at the upper end of the duct (61) of the exhaust mechanism (60).

The roll unit (10) is fixed to an upper end portion of the front plate (30a) of the wind tunnel (30), and an outlet (lib) of the roll unit (10) is provided inside the wind tunnel (30). It is open. The back plate (30b) of the wind tunnel (30) is formed of a plate material that is thinner and larger in height than the front plate (30a), and extends from the lower end to slightly below the upper end of the front plate (30a). Is parallel to the front plate (30a), and the portion above it is inclined away from the front plate (30a).

The wind tunnel (30) is provided with a short fiber stirring plate (32) for uniformly dispersing a large number of short fibers (3) discharged from the roll unit (10) in the wind tunnel (30). The short fiber stir plate (32) is a member having a width corresponding to the inner dimensions of the left and right side plates (30c, 30d) of the wind tunnel (30), and both ends are fixed to the side plates (30c, 30d). ing.

The short fiber stirring plate (32) is formed in a “T” shape with a flat cross section from the substrate portion (33) and the vortex flow forming plate (34) fixed to the lower surface side. The short fiber stir plate (32) is arranged obliquely in the wind tunnel (30), and is located between the upper end (33b) and the lower end (33a) of the substrate (33). (34) is located. The short fiber stirring plate (32) has a lower end portion (33a) of the substrate portion (33) close to the back plate (30b) of the wind tunnel (30). PT / JP03 / 03385

13, the upper end (33b) is located above the roll unit (10), and the tip (34a) of the vortex flow forming plate (34) is close to the upper casing (11c) of the roll unit (10). In this arrangement, the tip (34a) of the vortex flow forming plate (34) is located above the lower end (33a) of the substrate (33).

The short fiber stirring plate (32) defines a main flow path on the back plate (30b) side and a sub flow path on the front plate (30a) side in the wind tunnel (30).

Operation>

Next, the operation of the artificial cotton manufacturing apparatus (1) will be described.

First, in the material supply mechanism (50), a plurality of fiber materials (2) including PTFE fibers, ETFE fibers, or other fibers together with these fibers (2) Force S, and guide rolls (52, 53) from each bobbin (51) ) And nip rolls (54, 55) to the roll unit (10). The fiber material (2) is pushed into the casing (11) from the supply port (11a) of the casing (11), and is discharged between the lower casing (lid) and the needle blade roll (12) through the discharge port (lib). It flows toward.

The film thickness (about 30 wm) of the PTFE or ETFE fiber material (2) is determined by the gap C (50 to 500 / x ra) between the casing (11) and the needle blade roll (12). Small enough to the space between adjacent needle blades (14), but small enough for the space between adjacent needle blades (14). The short fiber (3) has a wire diameter of about 12 m and an average length of about 16 ram. At this time, the nip rolls (54, 55) rotate at a low speed and the needle blade roll (12) rotates at a high speed. The viscous stirring causes the short fibers (3) after cutting to slightly shrink.

The short fibers (3) are blown into the wind tunnel (30). Inside the wind tunnel (30), a downward air flow is generated by the forced exhaust by the exhaust mechanism (60), and the short fibers (3) ride on this air flow and are dispersed in the wind tunnel (30). While stacking on the surface of the slip sheet (20).

Here, the air sucked from above the wind tunnel (30) flows to the short fiber agitating plate (32) on the back plate (30b) side, and on the front plate (30a) side (roll unit (10) side). Assuming that is the sub-flow path, the gas passes through the throttle in both the main flow path and the sub-flow path. In addition, since air always passes through the throttles at two places, the negative pressure downstream of the throttles becomes greater than before, and 85

14 A relatively strong jet is generated at the exit. The short fibers (3) are uniformly stirred in the wind tunnel (30) by the interaction of the jets generated at the two places. The generation of a strong jet is caused by the fact that the vortex forming plate (34) intersects with the air flow in the sub-flow path and the air flow bends. This also has the effect of increasing the ventilation resistance during the period.

Downstream of the throttle on the sub flow path side, as shown in Fig. 8, the air blown by the needle blade roll (12) rotating at high speed and the jet from this throttle act as shown by the air flow. A vortex is generated. The vortex flow circulates from below the vortex flow forming plate ( ³ ) along the substrate portion ( ³³ ), and merges with the airflow from the sub-flow path soon. Therefore, the vortex flow forming plate (34) and the substrate portion ( since the lower surface side of 33) not stay air, short fibers (3) without residence, no troubles such as adhesion. also, short fibers ⁽³ a stirring effect by the vortex) in the wind tunnel ⁽³ 0) in Disperse more evenly.

Further, upward blow air is generated at the outlet (lib) of the roll unit (10), but the short fiber (3) rises due to the strong jet generated from the restriction of the sub-flow path as described above. It is not blown out of the aircraft by airflow.

The large number of short fibers (3) dispersed in the wind tunnel (30) in this way are transported in the flow of air, and when they reach the surface of the slip sheet (20), they are sucked from the exhaust mechanism (60). They are entangled and accumulate under the action of force. When the slip sheet (20) flows from the slip sheet roll (20) to the take-up roll (70), the short fibers (3) accumulated on the surface of the slip sheet (20) become nip rolls (41). To form pseudo cotton. The short fibers may be welded by heating at the time of press bonding with the nip roll (41). In addition, the manufactured artificial cotton is used by peeling off the slip paper at the time of use.

Effects of the embodiment>

In this embodiment, the distal end of the lower end of the substrate portion (33) of the short fiber stirring plate (32) (33a) is close to the wind tunnel ⁽³ 0) of the back plate (30b), the swirl plate (33) (34a) is arranged close to the mouth-to-runit (10), and the air passes through the two throttles and the air flow bends on the sub-flow channel side to increase the negative pressure in the wind tunnel (30), Since a strong jet is formed at the outlet of each throttle in the channel and the sub-channel, the short fibers (3) can be uniformly stirred by the interaction of the jets at the two places. Therefore, the short fibers (3) in the wind tunnel (30) Since variation (bias) can be suppressed, pseudo cotton with a uniform basis weight can be manufactured. Further, on the side of the sub flow path, the short fibers (3) can be prevented from staying near the wall surface or adhering to the wall surface due to the vortex generated by the action of the jet air and the air discharged from the roll unit (10). Furthermore, the upward flow in the wind tunnel (30) is suppressed by the jet flow on the roll unit (10) side, so that the short fibers (3) do not scatter outside the machine.

In addition, since the short fiber stirring plate (32) is arranged so that the end (33a) on the opposite side to the mouth unit (10) becomes lower, if the inclination is changed, the main flow path side and the sub flow path side are changed. The air flow can be adjusted, and the strength of the jet and vortex can be easily adjusted. With respect to the needle blade roll (12), if the needle blade (14) is inclined at right angles (along the radial direction) or backward in the rotational direction with respect to the circumferential surface of the roll body (13), the inside of the casing (11) will be reduced. The cutting action of the needle blade (14) on the fiber material (2) is likely to be strong, and the short fibers (3) formed from the fiber material (2) may be short, and the short fibers (3) may not be easily entangled with each other. However, in the present embodiment, the needle blade (14) is tilted so that the tip is positioned forward of the needle blade hole (12) in the rotation direction with respect to the diameter line of the needle body (13). In addition, the biting time of the needle blade (14) on the fiber material (2) becomes longer, and the tendency of the short fiber (3) to become shorter is eliminated. Therefore, since the short fibers (3) can be formed to have relatively long dimensions, when a large number of short fibers (3) are accumulated to produce a pseudo-cotton, the short fibers (3) are sufficiently entangled with each other. Thus, it becomes possible to produce pseudo cotton excellent in strength.

Modified Example of Embodiment>

(Modification 1)

FIG. 9 shows a first modification of the embodiment. In this example, the roll unit (10) is fixed to the back plate (30b) with the front and rear directions of the wind tunnel (30) reversed from those of the above-described embodiment. The back plate (30b) is configured by inverting the same members as the front plate (30a) of the embodiment in the front and rear directions (left and right in the figure), and the front plate (30a) is configured by the back plate (30b) of the embodiment. ) Is configured by reversing the same member as before and after. The short fiber stir plate (32) is also arranged symmetrically with the above embodiment, but the end (33a) of the roll unit (10) on the facing surface (30a) side is the end of the roll unit (10) side. The arrangement is lower than the tip (34a) of the vortex flow forming plate (34), which is the same as the above-described example.

Other configurations, functions and effects are the same as those of the embodiment. Five

16

(Modification 2)

FIG. 10 shows a second modification of the embodiment. In this example, regarding the casing (11) of the roll unit (10), the discharge port (lib) is configured to be wider toward the upper casing (11c). At the end of the upper casing (11c) on the discharge port (lib) side, a second vortex flow forming plate (llg) is fixed substantially parallel to the front plate (30a) of the wind tunnel (30). That is, in the second modified example, the second vortex flow forming plate (Ilg) is provided above the roll unit (10) below the air inlet (30e) of the wind tunnel (30).

When the outlet (lib) of the casing (11) is widened in this way, even if the short fiber (3) is entangled with the needle blade (14), the short fiber (3) is discharged into the wind tunnel (30). It will be easier. On the other hand, if the outlet (lib) is simply widened, the short fibers (3) released from the upper part of the outlet (lib) may flow out of the machine. The eddy current forming plate (llg) is provided and the eddy current forming plate (llg) is located above the roll unit (10) below the air inlet (30e) of the wind tunnel (30). After the short fiber (3) is wound into the vortex generated on the side of the wind tunnel (30) of the second vortex flow forming plate (11 g), the short fiber (3) is further placed on the air flow in the sub-flow path to enter the wind tunnel (30). Since it can be returned, the short fibers (3) can be prevented from scattering outside the machine. Industrial applicability

INDUSTRIAL APPLICABILITY As described above, the present invention is useful for a needle blade roll of a pseudo cotton manufacturing device.

Claims

The scope of the claims

1. Pseudo-cotton production in which a number of short fibers (1) to 20 Omm in length (3) are formed from a material (2) capable of forming pseudo-cotton and the short fibers (3) are accumulated to produce pseudo-cotton. In the apparatus (1), a needle blade roll rotatably mounted in a cylindrical casing (11) so as to form a large number of the short fibers (3) from the material (2),

It has a roll body (13) and a number of needle blades (14) implanted on its peripheral surface, and the needle blade (14) has a tip with respect to the diameter of the mouth body (13). A needle blade roll characterized by being inclined so as to be positioned forward in the rotation direction of the main body (13).

2. The needle blade (14) is implanted in the roll body (13) in such a manner that an inclination angle 0 with respect to a diameter line of the roll body (13) is in a range of 5 ° ≤ 0≤30 °. Needle described in item 1.

3. The needle blade needle according to claim 1, wherein the needle blade (14) is spirally arranged on the peripheral surface of the roll body (13).

4. The gap C between the tip of the needle blade (14) of the mouth body (13) and the inner peripheral surface of the casing (11) is 50 / 2ΐη≤Ο≤500ζm. Needle blade described in 1 or 2 above.

5. The material for forming a pseudo cotton of the pseudo cotton production device (1), wherein the material (2) capable of forming the pseudo cotton is made of at least one selected from synthetic resin, yarn, and sliver. Of the needle blade.

6. The needle blade roll according to claim 1, wherein the material (2) capable of forming the pseudo cotton of the pseudo cotton production device (1) is a synthetic resin.

7. The method according to claim 5, wherein the synthetic resin is composed of a fluororesin. Is the needle blade roll described in 6.

8. The tl "blade blade according to claim 7, wherein the fluororesin is composed of polytetrafluoroethylene and / or an ethylene-tetrafluoroethylene copolymer.

9. The needle blade according to claim 8, wherein the polytetrafluoroethylene and / or ethylene-tetrafluoroethylene-based copolymer is constituted by a uniaxially stretched product.

10. The needle blade needle according to claim 5, wherein the yarn is made of glass fiber or carbon fiber.

The needle blade roll according to claim ⁵ , wherein the sliver is made of aramide, polyimide, wool, or natural fiber.