Inline dispersion device

Abstract

To provide an in-line dispersion apparatus which includes a homogenizer capable of increasing a controlling width of a shear force to an object to be treated during a process.SOLUTION: An in-line dispersion apparatus includes a homogenizer having a stator 7 and a rotor 8 having a coaxially-arranged axial line and a movement mechanism which relatively moves the stator 7 and the rotor 8 in the direction of the axial line. A stator opposite surface 9 of a stator tooth part 7b of the stator 7 and a rotor opposite surface 10 of a rotor tooth part 8b of the rotor 8 which are relatively opposite to each other via radial direction clearance C are formed in such a shape that a radial direction clearance C is changed in accordance with the relative movement in a direction of the axial line of the stator 7 and the rotor 8 and the radial direction clearance C can be variably adjusted by movement mechanism.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an in-line dispersion device used for processes such as mixing, emulsifying, dispersing, and defoaming viscous liquids and powders in the manufacturing processes of pharmaceuticals, cosmetics, fine chemicals, batteries, foods, and the like.

Background Art

[0002] In the manufacturing processes of pharmaceuticals, cosmetics, fine chemicals, batteries, foods, and the like, there are dispersion devices used for processes such as mixing, emulsifying, dispersing, and defoaming viscous liquids and powders, and there is a type that is installed in the middle of a pipe (hereinafter referred to as an in-line dispersion device). As this in-line dispersion device, there is known one provided with a stator and a rotor whose axes are coaxially arranged, and a homogenizer that sucks, disperses, and extrudes an object to be processed by the turbulence effect accompanying the rotation of the rotor (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, as disclosed in Patent Document 1, in this type of in-line dispersion device, the stator has a stator base portion and stator tooth portions formed along the circumferential direction of the stator base portion and extending from the stator base portion to one side in the direction of the axis. Further, the rotor has a rotor base portion and rotor tooth portions formed along the circumferential direction of the rotor base portion, extending from the rotor base portion to the other side in the axial direction, and combined with the stator tooth portions via a radial clearance.

[0005] The object to be processed is subjected to a shearing force by the stator tooth portion and the rotor tooth portion, and the shearing force is controlled by the clearance between the stator tooth portion and the rotor tooth portion (particularly, the radial clearance) and the rotational speed of the rotor.

[0006] However, when changing the clearance between the stator tooth portion and the rotor tooth portion, it is necessary to once stop the in-line dispersing device and perform disassembly and assembly. Therefore, during the process, the shearing force is controlled only by the rotational speed of the rotor, and the control range is small. Accordingly, a situation occurs where it is not possible to sufficiently cope with a change in the shearing force during the process.

[0007] In view of the above circumstances, the technical problem of the present invention is to provide an in-line dispersing device provided with a homogenizer capable of increasing the control range of the shearing force applied to the object to be processed during the process.

Means for Solving the Problems

[0008] The in-line dispersion device according to the present invention devised to solve the above problems includes a casing, a stator and a rotor disposed inside the casing with their axes coaxially arranged, a homogenizer that sucks, disperses, and extrudes the object to be processed due to the turbulence effect accompanying the rotation of the rotor, a supply unit for supplying the object to be processed from the outside to the inside of the casing, and a discharge unit for discharging the object to be processed from the inside to the outside of the casing. The object to be processed supplied into the casing through the supply unit is sucked, dispersed, and extruded by the homogenizer and discharged to the outside of the casing through the discharge unit. The in-line dispersion device is characterized in that a moving mechanism for relatively moving the stator and the rotor of the homogenizer in the axial direction is provided. The stator has a stator base and stator tooth portions formed along the circumferential direction of the stator base and extending from the stator base to one side in the axial direction. The rotor has a rotor base and rotor tooth portions formed along the circumferential direction of the rotor base and extending from the rotor base to the other side in the axial direction, and the rotor tooth portions are combined with the stator tooth portions through a radial clearance. The opposing surfaces of the stator tooth portions and the rotor tooth portions facing each other through the radial clearance are formed in a shape such that the radial clearance changes according to the relative movement of the stator and the rotor in the axial direction, and the radial clearance is variable and adjustable by the moving mechanism.

[0009] According to this configuration, by relatively moving the stator and the rotor in the axial direction, the radial clearance between the stator tooth portion and the rotor tooth portion can be variably adjusted. It is possible to relatively move the stator and the rotor in the axial direction even during the process. Therefore, even during the process, the radial clearance between the stator tooth portion and the rotor tooth portion can be variably adjusted. For this reason, even during the process, the shearing force applied to the object to be processed can be variably adjusted. As a result, the shearing force during the process can be controlled by the radial clearance between the stator tooth portion and the rotor tooth portion, and it is possible to increase the control range compared to the conventional case where it is controlled only by the rotational speed of the rotor. That is, according to the in-line dispersing device of the present invention, it is possible to provide an in-line dispersing device provided with a homogenizer capable of increasing the control range of the shearing force applied to the object to be processed during the process.

[0010] Further, by variably adjusting the radial clearance between the stator tooth portion and the rotor tooth portion, the resistance when the object to be processed enters the homogenizer can be variably adjusted, and the flow rate of the object to be processed per unit time (processing flow rate) can be variably adjusted. Therefore, during the process, the processing flow rate of the object to be processed can be variably adjusted.

[0011] Also, in the cleaning process, by increasing the radial clearance between the stator tooth portion and the rotor tooth portion and passing the cleaning liquid through the rotation of the rotor to clean the stator and the rotor, the cleanability of the stator and the rotor can be improved. As a result, it is possible to eliminate the need for disassembling and cleaning the stator and the rotor.

[0012] Moreover, it is possible to always adjust the radial clearance between the stator tooth portion and the rotor tooth portion according to the degree of wear of the stator and the rotor.

[0013] In the above configuration, the stator may be arranged slidably in the axial direction with respect to the inner periphery of the casing.

[0014] With this configuration, a structure for relatively moving the stator and the rotor in the axial direction can be easily obtained.

[0015] In the above configuration, the supply unit may have a supply path that penetrates the stator along the axis.

[0016] With this configuration, it is possible to smoothly supply the object to be processed into the homogenizer through the supply path that penetrates the stator.

[0017] In the above configuration, at least one of the opposing surfaces of the stator tooth portion and the rotor tooth portion may be formed as an inclined surface that is inclined so as to gradually displace toward the side of the side surface opposite to the opposing surface of the tooth portion toward the tip side of the tooth portion in a cross section including the axis.

[0018] With this configuration, it is possible to easily obtain an opposing surface having a shape in which the radial clearance between the stator tooth portion and the rotor tooth portion changes according to the relative movement in the axial direction of the stator and the rotor.

[0019] In the above configuration, the opposing surfaces of both the stator tooth portion and the rotor tooth portion may be formed on the inclined surface.

[0020] In the above configuration, in a cross section including the axis, the inclined surface may be linear.

[0021] In the above configuration, in a cross section including the axis, the stator tooth portion and the rotor tooth portion may each have a line-symmetric shape with a straight line parallel to the axis as the axis of symmetry.

Advantages of the Invention

[0022] According to the present invention, it is possible to provide an in-line dispersion device including a homogenizer capable of increasing the control range of the shearing force applied to the object to be processed during the process.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

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Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0024] Based on FIGS. 1 to 11, the in-line dispersing device 1 according to an embodiment of the present invention will be described. As shown in FIGS. 1 and 2, the in-line dispersing device 1 includes a casing 2, a homogenizer 3, a supply unit 4, a discharge unit 5, and a moving mechanism 6 as main components.

[0025] The homogenizer 3 is disposed inside the casing 2 and has a stator 7 and a rotor 8 arranged such that their axes are the same axis A. Further, the homogenizer 3 sucks in, disperses, and extrudes the object to be processed due to the turbulence effect accompanying the rotation of the rotor 8.

[0026] The supply unit 4 is a part for supplying the object to be processed from the outside to the inside of the casing 2, and the discharge unit 5 is a part for discharging the object to be processed from the inside to the outside of the casing 2. The moving mechanism 6 relatively moves the stator 7 and the rotor 8 of the homogenizer 3 in the direction of the axis A.

[0027] In this embodiment, the direction of the axis A is along the lateral direction (horizontal direction), but it is not limited thereto. For example, the direction of the axis A may be along the vertical direction. Further, in the following description, one side in the direction of the axis A is the right side in FIGS. 1 and 2, and the other side in the direction of the axis A is the left side in FIGS. 1 and 2.

[0028] As shown in FIG. 1, a supply pipe P1 is connected to the supply unit 4 of the in-line dispersing device 1, and a discharge pipe P2 is connected to the discharge unit 5 of the in-line dispersing device 1.

[0029] As shown by the white arrow in FIG. 2, in the in-line dispersing device 1, the object to be processed supplied into the inside of the casing 2 through the supply unit 4 is sucked in by the homogenizer 3, dispersed, extruded, and discharged to the outside of the casing 2 through the discharge unit 5.

[0030] As shown in FIGS. 4 to 7, the stator 7 has a columnar stator base 7a and two stator tooth portions 7b that are continuously formed along the circumferential direction of the stator base 7a and extend from the stator base 7a to one side in the direction of the axis A. The stator tooth portions 7b have stator side surfaces 7c on the outer peripheral side and the inner peripheral side. In the stator tooth portions 7b, stator through holes 7d penetrating in the radial direction are formed at equal intervals in the circumferential direction. The stator through holes 7d are in the shape of a long hole inclined with respect to the direction of the axis A when viewed along the penetrating direction. The shapes, dimensions, numbers, and circumferential positions of the stator through holes 7d are the same in the two stator tooth portions 7b.

[0031] Also, as shown in FIGS. 1 and 2, one part of the stator base 7a of the stator 7 in the direction of the axis A is disposed inside the casing 2, and the other part in the direction of the axis A is disposed outside the casing 2. The supply unit 4 is provided on the stator base 7a of the stator 7 and has a supply path R for the object to be processed that penetrates the stator 7 along the axis A. This supply path R is constituted by the internal space of a through hole formed along the axis A in the stator base 7a of the stator 7.

[0032] Also, the stator base 7a of the stator 7 is slidably disposed with respect to the inner periphery of the casing 2 in the direction of the axis A. More specifically, as shown in FIG. 2, a seal member S1 is disposed on the inner peripheral side of the peripheral wall portion 2a on the other side in the direction of the axis A in the casing 2, and the outer peripheral surface of the stator base 7a slides in contact with the seal member S1.

[0033] As shown in FIGS. 8 to 11, the rotor 8 has a disk-shaped rotor base 8a and one rotor tooth portion 8b that is continuously formed along the circumferential direction of the rotor base 8a and extends from the rotor base 8a to the other side in the direction of the axis A. The rotor tooth portion 8b has rotor side surfaces 8c on the outer peripheral side and the inner peripheral side. In the rotor tooth portion 8b, rotor through holes 8d penetrating in the radial direction are formed at equal intervals in the circumferential direction. The rotor through holes 8d have an elongated hole shape extending along the axis A when viewed along the penetration direction. The number of the rotor through holes 8d is the same as the number of the stator through holes 7d of one stator tooth portion 7b.

[0034] On the inner peripheral side of the rotor tooth portion 8b of the rotor 8, a plurality of blade portions 8e extending from the rotor base portion 8a to the other side in the direction of the axis A are formed. As shown in FIG. 9, when viewed from the other side in the direction of the axis A, the blade portions 8e have a shape that gradually displaces toward one side in the circumferential direction of the rotor base portion 8a toward the outer peripheral side. Further, a boss portion 8f extending to the other side in the direction of the axis A is formed at the center of the rotor base portion 8a. The inner peripheral end of the blade portion 8e is spaced apart from the boss portion 8f by a predetermined distance in the radial direction. Also, a shaft portion 8g extending to one side in the direction of the axis A is formed at the center of the rotor base portion 8a.

[0035] As shown in FIG. 3, the rotor tooth portion 8b of the rotor 8 is combined with the stator tooth portion 7b of the stator 7 via a radial clearance C. The stator side surface 7c of the stator tooth portion 7b (hereinafter referred to as the stator facing surface 9) and the rotor side surface 8c of the rotor tooth portion 8b (hereinafter referred to as the rotor facing surface 10) facing each other via the radial clearance C are formed in a shape in which the radial clearance C changes according to the relative movement of the stator 7 and the rotor 8 in the direction of the axis A. Therefore, by relatively moving the stator 7 and the rotor 8 in the direction of the axis A by the moving mechanism 6, the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b can be variably adjusted.

[0036] Note that the inner peripheral side stator side surface 7c of the inner peripheral side stator tooth portion 7b and the outer peripheral side end surface 8h of the blade portion 8e of the rotor 8 also face each other via a predetermined radial clearance.

[0037] The stator facing surface 9 of the stator tooth portion 7b is formed as an inclined surface that is inclined so as to gradually displace toward the side of the stator side surface 7c on the side opposite to the stator facing surface 9 in the stator tooth portion 7b toward the tip side of the stator tooth portion 7b in a cross section including the axis A. In a cross section including the axis A, this inclined surface is linear.

[0038] Also, in a cross section including the axis A, the stator tooth portion 7b has a line-symmetric shape with a straight line L parallel to the axis A as the axis of symmetry.

[0039] In this embodiment, both the rotor side surface 8c of the rotor tooth portion 8b serve as the rotor opposing surface 10. One of the rotor opposing surfaces 10 of the rotor tooth portion 8b is formed as an inclined surface that is inclined so as to gradually displace toward the side of the rotor side surface 8c (the other rotor opposing surface 10) on the side opposite to the rotor opposing surface 10 in the rotor tooth portion 8b toward the tip side of the rotor tooth portion 8b in a cross section including the axis A. In the cross section including the axis A, this inclined surface is linear.

[0040] Also, in the cross section including the axis A, the rotor tooth portion 8b has a line-symmetric shape with a straight line L parallel to the axis A as the axis of symmetry.

[0041] Note that in the cross section including the axis A, the inclined surface of the rotor opposing surface 10 and the inclined surface of the stator opposing surface 9 are parallel. In other words, in the cross section including the axis A, the inclination angle of the inclined surface of the rotor opposing surface 10 with respect to the axis A and the inclination angle of the inclined surface of the stator opposing surface 9 with respect to the axis A are the same. For this reason, the radial clearance C between the rotor opposing surface 10 and the stator opposing surface 9 is uniform in the direction of the axis A. This does not change even if the stator 7 and the rotor 8 are relatively moved in the direction of the axis A.

[0042] In this embodiment, the position of the rotor 8 in the direction of the axis A is fixed, and the moving mechanism 6 moves the stator 7 in the direction of the axis A with respect to the rotor 8. As shown in FIG. 1, the moving mechanism 6 includes a feed screw mechanism 6a and a moving motor 6b. A flange portion 7e is provided on the other side in the direction of the axis A on the outer peripheral surface of the stator base portion 7a of the stator 7, and a mounting portion 7f extending to the outer periphery is provided in a part of the circumferential direction of the flange portion 7e, and the nut portion of the feed screw mechanism 6a is attached to this mounting portion 7f. The rotation axis of the screw shaft of the feed screw mechanism 6a is parallel to the axis A. The rotational driving force of the moving motor 6b is converted by the feed screw mechanism 6a into a driving force for moving the stator 7 along the direction of the axis A. The movement of the stator 7 along the direction of the axis A is performed, for example, in units of 0.1 mm.

[0043] Note that the supply pipe P1 connected to the supply unit 4 is flexible. As the stator 7 moves by the moving mechanism 6, the degree of bending of the supply pipe P1 changes, thereby allowing the movement of the stator 7 by the moving mechanism 6.

[0044] With the shaft portion 8g of the rotor 8 inserted into the end portion of the rotary drive shaft 11, the rotor 8 is fixed to the rotary drive shaft 11. The rotor 8 rotates integrally with the rotary drive shaft 11. A rotary driving force is input to the rotary drive shaft 11 from a rotary driving motor 12 disposed on one side in the direction of its axis A.

[0045] Note that the rotary drive shaft 11 is disposed coaxially with the rotor 8. Further, the rotary drive shaft 11 is disposed inside the casing 2 and is rotatably supported by the casing 2 via a bearing 11a. The internal space of the casing 2 where the rotor 8 is disposed is partitioned by a seal portion S2 from the internal space of the casing 2 where most of the rotary drive shaft 11 is disposed.

[0046] Further, the casing 2 is fixed to the rotary driving motor 12, and the rotary driving motor 12 is fixed to a support base (not shown). Also, the moving motor 6b is fixed to the support base to which the rotary driving motor 12 is fixed.

[0047] During the operation of the in-line dispersing device 1, due to the turbulence effect accompanying the rotation of the rotor 8 of the homogenizer 3, the object to be processed supplied from the supply pipe P1 through the supply unit 4 is sucked into the homogenizer 3, and further, by centrifugal force, it is pushed out from the stator through holes 7d of the stator tooth portion 7b and the rotor through holes 8d of the rotor tooth portion 8b. At this time, the object to be processed is dispersed by the shearing action of the stator tooth portion 7b and the rotor tooth portion 8b. Then, the dispersed object to be processed is discharged to the discharge pipe P2 through the discharge unit 5.

[0048] In the in-line dispersing device 1 configured as described above, the following effects can be achieved.

[0049] By relatively moving the stator 7 and the rotor 8 in the direction of the axis A, the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b can be variably adjusted. Moving the stator 7 and the rotor 8 relatively in the direction of the axis A is possible even during the process. Therefore, even during the process, the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b can be variably adjusted. For this reason, even during the process, the shearing force applied to the object to be processed can be variably adjusted. As a result, the shearing force during the process can be controlled by the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b, and the control range can be made larger than in the conventional case where it is controlled only by the rotational speed of the rotor 8. That is, according to the in-line dispersing device 1 according to the present embodiment, it is possible to provide an in-line dispersing device provided with a homogenizer capable of increasing the control range of the shearing force applied to the object to be processed during the process.

[0050] Also, by variably adjusting the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b, the resistance when the object to be processed enters the homogenizer 3 can be variably adjusted, and the flow rate of the object to be processed per unit time (processing flow rate) can be variably adjusted. Therefore, during the process, the processing flow rate of the object to be processed can be variably adjusted.

[0051] Also, in the cleaning process, by increasing the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b and passing the cleaning liquid through the rotation of the rotor 8 to clean the stator 7 and the rotor 8, the cleanability of the stator 7 and the rotor 8 can be enhanced. As a result, it is possible to eliminate the need for disassembling and cleaning the stator 7 and the rotor 8.

[0052] Also, it is possible to always adjust the radial clearance C between the stator tooth portion 7b and the rotor tooth portion 8b according to the degree of wear of the stator 7 and the rotor 8.

[0053] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of its technical idea. For example, in the above embodiment, the supply unit 4 was provided on the stator 7, but the present invention is not limited to this. For example, as shown in FIG. 12, the entire annular stator 7 may be disposed inside the casing 2, and the supply unit 4 may be provided on the end wall portion 2b of the casing 2. In this case, one end of the rod-shaped member 6c slidably inserted through the end wall portion 2b of the casing 2 is fixed to the stator base portion 7a of the stator 7, and the other end is fixed to the annular connecting portion 6d. An attachment portion 6e extending to the outer peripheral side is provided in a part of the circumferential direction of the connecting portion 6d, and a nut portion (not shown) of the feed screw mechanism 6a is fixed to the attachment portion 6e.

[0054] Further, in the above embodiment, in the cross section including the axis A, both the stator facing surface 9 of the stator tooth portion 7b and the rotor facing surface 10 of the rotor tooth portion 8b were formed as inclined surfaces inclined with respect to the axis A. However, the stator facing surface 9 of the stator tooth portion 7b and the rotor facing surface 10 of the rotor tooth portion 8b may be formed in a shape in which the radial clearance C changes according to the relative movement in the direction of the axis A of the stator 7 and the rotor 8. For example, as shown in FIG. 13(A), one (the rotor facing surface 10 in the illustrated example) may be formed to be parallel to the axis A in the cross section including the axis A. Further, as shown in FIG. 13(B), both the stator facing surface 9 of the stator tooth portion 7b and the rotor facing surface 10 of the rotor tooth portion 8b may be provided by forming annular grooves 9b and 10b having a U shape in the cross section including the axis A on surfaces 9a and 10a that are straight lines parallel to the axis A in the cross section including the axis A.

[0055] Also, in the above embodiment, the feed screw mechanism 6a was used for the moving mechanism 6, but a mechanism for relatively moving the stator 7 and the rotor 8 in the direction of the axis A may be used. For example, a cylinder mechanism or the like may be used.

[0056] Also, in the above-described embodiment, the moving mechanism 6 did not move the stator 7 in the direction of the axis A with respect to the rotor 8 based on specific information, but the moving mechanism 6 may move the stator 7 in the direction of the axis A with respect to the rotor 8 based on specific information. For example, based on the torque value of the rotor 8, the moving mechanism 6 may move the stator 7 in the direction of the axis A with respect to the rotor 8 so as to variably adjust the radial clearance C.

[0057] Also, in the above-described embodiment, the stator through-hole 7d of the stator 7 had an elongated hole shape inclined with respect to the direction of the axis A when viewed along the penetration direction, but may have an elongated hole shape extending along the direction of the axis A when viewed along the penetration direction. Further, in the above-described embodiment, the rotor through-hole 8d of the rotor 8 had an elongated hole shape extending along the direction of the axis A when viewed along the penetration direction, but may have an elongated hole shape inclined with respect to the direction of the axis A when viewed along the penetration direction.

[0058] Also, in the above-described embodiment, the stator tooth portions 7b were continuously formed along the circumferential direction of the stator base portion 7a, but the stator tooth portions 7b may be intermittently formed along the circumferential direction of the stator base portion 7a. Further, in the above-described embodiment, the rotor tooth portions 8b were also continuously formed along the circumferential direction of the rotor base portion 8a, but the rotor tooth portions 8b may also be intermittently formed along the circumferential direction of the rotor base portion 8a.

Explanation of Reference Numerals

[0059] 1 In-line dispersion device 2 Casing 3 Homogenizer 4 Supply section 5 Discharge section 6 Moving mechanism 7 Stator 7a Stator base portion 7b Stator tooth portion 7c Stator side surface 8 Rotor 8a Rotor base portion 8b Rotor tooth portion 8c Rotor side surface 9 Stator facing surface 10 Rotor facing surface Axis A Clearance in the C radial direction Straight line parallel to the L axis R Supply path

Claims

1. An in-line dispersing device comprising a casing, a stator and a rotor disposed inside the casing with their axes coaxially arranged, a homogenizer that sucks in, disperses, and extrudes the object to be processed due to the turbulence effect accompanying the rotation of the rotor, a supply unit for supplying the object to be processed from the outside to the inside of the casing, and a discharge unit for discharging the object to be processed from the inside to the outside of the casing, wherein the object to be processed supplied into the casing through the supply unit is sucked in, dispersed, and extruded by the homogenizer and discharged to the outside of the casing through the discharge unit, a moving mechanism is provided for relatively moving the stator and the rotor of the homogenizer in the axial direction, the stator has a stator base portion and stator tooth portions formed along the circumferential direction of the stator base portion and extending from the stator base portion to one side in the axial direction, and the rotor has a rotor base portion and rotor tooth portions formed along the circumferential direction of the rotor base portion and extending from the rotor base portion to the other side in the axial direction, and the rotor tooth portions are combined with the stator tooth portions via a radial clearance, the opposing surfaces of the stator tooth portions and the rotor tooth portions facing each other through the radial clearance are formed in a shape such that the radial clearance changes according to the relative movement of the stator and the rotor in the axial direction, and the radial clearance is variable and adjustable by the moving mechanism, the stator is slidably disposed in the axial direction with respect to the inner circumference of the casing and is moved in the axial direction with respect to the rotor by the moving mechanism, the supply unit is provided on the stator base portion and has a supply path penetrating the stator along the axis, and a supply pipe that can be bent is connected to the supply unit. The in-line dispersing device is characterized by this.

2. The in-line dispersing device according to claim 1, wherein at least one of the opposing surfaces of the stator tooth portions and the rotor tooth portions is formed as an inclined surface that is inclined so as to gradually displace toward the side of the surface opposite to the opposing surface of the tooth portion toward the tip side of the tooth portion in a cross section including the axis.

3. The in-line dispersing device according to claim 2, wherein the opposing surfaces of both the stator tooth portions and the rotor tooth portions are formed as the inclined surfaces.

4. The in-line dispersion device according to claim 2 or 3, wherein in a cross section including the axis, the inclined surface is linear.

5. The in-line dispersion device according to any one of claims 2 to 4, wherein in a cross section including the axis, the stator tooth portion and the rotor tooth portion each have a line-symmetric shape with a straight line parallel to the axis as the axis of symmetry.

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