Spheroidization device

Abstract

To provide a powder spheroidizing device which can produce spheroidized fine particles while maintaining material crushing effects.SOLUTION: A spheroidizing device 1 has a liner 3 where a large number of crushing grooves 21 are formed on its inner peripheral surface, and a rotor 4 where a large number of crushing grooves 22 are formed on its outer peripheral surface. The crushing grooves 21 and 22 of the liner 3 and the rotor 4 have the same cross-sectional shape. Each of the crushing grooves 21 and 22 has a round part 23 having an arcuate bottom surface, and an inclination part 24 extending in a circumferential direction. Radial openings 25a and 25b extending in a tangential direction are formed on both ends of the round part 23. The inclination part 24 includes a slope 26 arranged on the side of the round part 23, and a horizontal surface 27 which is arranged on the side of the adjacent crushing grooves 21 and 22 continuous to the slope 26. The spheroidizing device 1 draws a powder raw material to the crushing grooves 21 and 22 by a swirl flow generated in the round part 23, and rolls the drawn powder raw material in the round part 23 and the inclined part 24 and produces spherical fine particles.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a pulverizer for obtaining fine powders such as toner for electrostatic charge image development, negative electrode materials for secondary batteries, powder coatings, etc., and particularly to a powder spheroidizing apparatus suitable for spheroidizing fine powder particles.

Background Art

[0002] Conventionally, for resin fine powders such as toner for electrostatic charge image development and fluororesin powder, along with demands for higher image quality in copying etc. and higher performance of dry lubricants etc., finer powder particle diameters have been demanded. In view of such demands, the applicant of the present application has created (Patent Document 1) and commercialized a pulverizer that can pulverize a pulverized product to a particle diameter below the conventional pulverization limit while having a small pulverization power.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, in recent years, for fine powders such as toner, spheroidization of fine powder particles has been demanded for minimizing the specific surface area and improving fluidity and filling properties. Also, in negative electrode materials for secondary batteries, spheroidization of particles has been demanded for the purpose of improving the filling property (bulk density) in order to increase the amount of particles filled in a certain volume. At that time, even in the pulverizer of Patent Document 1, fine powder that is considerably spheroidized with a narrow particle size distribution is obtained, but the demand for spheroidization has become stricter year by year, and an apparatus capable of further spheroidization has been demanded.

[0005] An object of the present invention is to provide a powder spheroidizing apparatus capable of producing more spheroidized fine powder particles while maintaining the material pulverization effect as a pulverizer.

Means for Solving the Problems

[0006] The present invention provides a powder spheroidizing apparatus comprising: a liner formed in a hollow cylindrical shape and having numerous grinding grooves formed on its inner circumferential surface; and a rotor concentrically disposed inside the liner with a gap between them and having numerous grinding grooves formed on its outer circumferential surface, wherein the grinding grooves of the liner and the rotor have the same cross-sectional shape, and each of the grinding grooves has an arc-shaped bottom surface. Radial openings extending in the arc-tangential direction are formed at both ends. A rounded portion and provided on one end of the arc of the rounded portion in the circumferential direction of the liner and the rotor. It is formed and extends to a size larger than the radius Rg of the rounded portion, and the vortex generated within the rounded portion causes the powder drawn into the grinding groove to roll. It has an inclined section, The radial opening has one end that is continuously connected to the inclined portion, and the other end that extends to the circumferential surface of the liner and the rotor and forms an opening edge that becomes the top of the grinding groove. The inclined portion has a slope that is located on the rounded portion side and is continuously connected to one end of the radial opening, and a horizontal plane that is located on the adjacent grinding groove side and has one end that is continuously connected to the opening edge of the adjacent grinding groove and the other end that is continuously connected to the slope. The horizontal plane is arranged along a straight line L connecting adjacent tops, and the slope is inclined at an angle θ3 with respect to the straight line L in the radial direction of the liner and the rotor from the horizontal plane. It is characterized by the following:

[0007] In this invention, grinding grooves are formed on the circumferential surfaces of the liner and rotor, and rounded and inclined portions are provided in these grinding grooves. As a result, rolling of the powder raw material (material to be processed) occurs and is promoted in the grinding grooves, resulting in grinding and corner removal of the powder raw material particles and a rounding effect of the particles. Through the synergistic effect of these, fine powder particles with rounded edges are produced.

[0008] In the aforementioned spheroidizing apparatus, A connection portion Y between the radial opening and the inclined portion is provided radially outward of the liner or radially inward of the rotor than the straight line L in the grinding groove, and the inclined portion bends at the connection portion Y toward the radially outward of the liner or radially inward of the rotor from the arc tangential direction of the round portion and extends along the circumferential direction. You can do that.

[0009] In the aforementioned spheroidizing apparatus, The groove pitch P between adjacent top portions Z in the aforementioned grinding groove is set to 5.0 to 15 mm, making the groove pitch P larger than that of conventional grinders. You can.

[0010] The radius of the rounded portion may be set to 0.5 mm to 1.5 mm, preferably 0.8 mm to 1.2 mm, more preferably 1.0 mm; the opening angle θ1 at both ends of the radial opening may be set to 25° to 45°, preferably 30° to 40°, more preferably 35°; and the angle θ2 between the radial opening and the inclined portion of the adjacent grinding groove may be set to 70° to 90°, preferably 75° to 85°, more preferably 80°.

[0011] At the edge of the opening, the radial opening and the inclined portion of the adjacent grinding groove may be connected by a curved surface, or one end of the radial opening and the inclined portion may be connected by a curved surface.

[0012] The slope is relative to the straight line L. The surface may be inclined at an angle θ3 of 5° to 20°, preferably 5° to 15°, and more preferably 10°. Alternatively, the inclined surface and the horizontal surface may be connected by a curved surface. [Effects of the Invention]

[0013] According to the spheroidizing apparatus of the present invention, grinding grooves are formed on the circumferential surfaces of the liner and rotor of the spheroidizing apparatus, and rounded and inclined portions are provided in these grinding grooves. This allows for the generation and promotion of rolling of the powder raw material in the grinding grooves. Therefore, the spheroidizing apparatus makes it possible to grind and remove the edges of the powder raw material, and further spheroidization of the generated fine powder particles is achieved. [Brief explanation of the drawing]

[0014] [Figure 1] This is a cross-sectional view showing the overall configuration of a spheroidizing device, which is one embodiment of the present invention. [Figure 2] This is a partial cross-sectional view along line AA in Figure 1. [Figure 3] This is an explanatory diagram showing the structure of the grinding grooves. [Figure 4] This is an explanatory diagram illustrating the pulverization and spheroidization process of powdered raw materials in the spheroidization apparatus according to the present invention. [Figure 5] Table 1 shows micrographs of the examples and comparative examples. [Modes for carrying out the invention]

[0015] Hereinafter, embodiments of the present invention will be described. FIG. 1 is a cross-sectional view showing the overall configuration of a powder spheroidizing apparatus (hereinafter abbreviated as the spheroidizing apparatus) according to an embodiment of the present invention. As shown in FIG. 1, the spheroidizing apparatus 1 includes a cylindrical outer box 2, a hollow cylindrical liner (stator) 3 (inner diameter radius R1) fixed inside the outer box 2, and a rotor (rotor) 4 (outer diameter radius R2) rotatably accommodated inside the liner 3. The rotor 4 is attached to a rotating shaft 5 arranged on the center line O of the liner 3 via a key 6 and a nut 7. The rotating shaft 5 is arranged concentrically with the liner 3 and is rotatably supported by bearings 8a and 8b arranged at both axial ends of the outer box 2. A pulley 9 is fixed to the end of the rotating shaft 5, and the rotating shaft 5 and the rotor 4 are integrally rotated at high speed by a belt (not shown).

[0016] A gap G is formed between the liner 3 and the rotor 4, and a pulverizing chamber 11 for pulverizing the powder raw material is formed. The pulverizing chamber 11 communicates with an inlet 12 provided on one end side (left side in FIG. 1) of the outer box 2 and an outlet 13 provided on the other end side, respectively. The powder raw material introduced from the inlet 12 is pulverized and refined in the pulverizing chamber 11 and discharged outside the machine from the outlet 13. The fine powder particles discharged outside the machine are conveyed together with the air sucked from the outlet 13 side by a blower and separated into fine powder and air by a cyclone (not shown). Thereafter, the fine powder particles are collected in a product tank under the cyclone, and the air is discharged into the atmosphere after minute dust is removed by a dust collector (bag filter).

[0017] In the spheroidizing device 1, a large number of pulverizing grooves 21 and 22 extending parallel to the center line O are provided on the inner peripheral surface of the liner 3 and the outer peripheral surface of the rotor 4, respectively. FIG. 2 is a partial cross-sectional view taken along the line A-A in FIG. 1. The pulverizing grooves 21 and 22 are continuously formed at a predetermined pitch P over the entire circumference of the inner peripheral surface of the liner 3 and the outer peripheral surface of the rotor 4. As shown in FIG. 2, the pulverizing groove 21 on the liner 3 side and the pulverizing groove 22 on the rotor 4 side are arranged in a state of being opposed to each other in the radial direction within the pulverizing chamber 11. The pulverizing grooves 21 and 22 are opposed to each other with a gap G = R1 - R2 = 2.0 to 1.0 mm, where R1 is the inner diameter radius of the liner 3 and R2 is the outer diameter radius of the rotor 4. Depending on the specifications of the spheroidizing device 1, R1 is appropriately set to 125 mm to 400 mm (diameter 250 to 800 mm), and R2 is appropriately set to 124 mm to 399 mm (diameter 248 mm to 798 mm).

[0018] FIG. 3 is an explanatory view showing the configuration of the pulverizing groove 22. Since the opposing pulverizing groove 21 has the same cross-sectional shape and dimensions as the pulverizing groove 22, only the pulverizing groove 22 on the rotor 4 side will be described here. As shown in FIG. 3, the pulverizing groove 22a (22) includes a round portion 23 (radius Rg = 1.0 mm) having an arcuate bottom surface and an inclined portion 24 formed at one end of the arc of the round portion 23 (left side in FIG. 3: rear side in the rotor rotation direction, the same applies hereinafter) and extending in the circumferential direction. In the spheroidizing device 1 according to the present invention, the powder raw material is drawn into the pulverizing groove 22 by the vortex generated in the round portion 23, and is rolled and rounded by the round portion 23 and the inclined portion 24 to generate spherical fine powder particles.

[0019] At both circumferential ends of the rounded section 23, radial openings 25a and 25b are provided, extending tangentially from both ends of the rounded section and opening radially outward in the rotor radial direction. Here, the opening angle θ1 at both ends of the radial openings 25 is formed to be 35°. The inclined section 24 is composed of a slope 26 and a horizontal surface 27, which are continuously connected at a connection part X. The right side of the slope 26 in Figure 3 (the other end side: the front side in the rotor rotation direction, and so on), that is, the side not connected to the horizontal surface 27, is continuously connected to one end of the radial opening 25a at a connection part Y. The horizontal surface 27 extends circumferentially from the connection part X, is the boundary with the adjacent crushing groove 22b, and reaches the groove top Z, which is the opening edge 28 of the crushing groove 22b.

[0020] At the groove top Z, the horizontal surface 27 of the inclined section 24 is connected to the radial opening 25b (other end side) of the adjacent grinding groove 22b. Here, the angle θ2 between the horizontal surface 27 and the radial opening 25b is formed to be 80°. The distance between the groove top Z and the bottom 23a of the rounded section 23, i.e., the depth S of the grinding groove 22, is 2.2 mm. On the other hand, the distance between adjacent groove tops Z is the pitch P between the grinding grooves 22, which is the sum of the length La of the horizontal surface 27 and the distance Lb between the connecting section X and the groove top Z of the grinding groove 22a. Here, La is set to 2 mm and Lb to 8.3 mm, so the pitch P between the grinding grooves 22 is 10.3 mm.

[0021] Furthermore, the horizontal plane 27 is positioned along a straight line L connecting the groove tops Z of adjacent grinding grooves 22. The inclined surface 26 slopes from the horizontal plane 27 toward the connection Y, and here it extends while inclining toward the center of the rotor 4 (downward from the straight line L in Figure 3) at θ3 = 10° with respect to the straight line L. In the case of the grinding grooves 22, conversely, it slopes toward the radially outward direction of the liner 3 from the horizontal plane 27.

[0022] In the spheroidizing device 1, such grinding grooves 21 and 22 are formed continuously and at the same pitch P on the entire outer circumference of the rotor 4 and the entire inner circumference of the liner 3, thereby grinding and spheroidizing the powder raw material. Figure 4 is an explanatory diagram showing the grinding and spheroidizing action of the powder raw material in the spheroidizing device 1 according to the present invention.

[0023] Here, when the rotor 4 rotates at a constant speed in the spheroidizing device 1, an airflow AF is generated in the gap G between the liner 3 and the rotor 4. As shown in Figure 4, this airflow AF flows along the shape of the grinding grooves 21 and 22, and the airflow AF that crosses the groove tops Z is drawn into the rounded section 23 of the grinding grooves 21 and 22 by the negative pressure generated on the adjacent rounded section 23 side. The air drawn into the rounded section 23 has the property of flowing along its shape, and as a result, a vortex flow VF is generated within the rounded section 23. The rotational speed of the vortex flow VF changes in proportion to the rotational speed of the rotor 4. Therefore, the speed of the vortex flow VF can be controlled by the rotational speed of the rotor 4, and the particle size of the generated fine powder particles and the spheroidizing effect can also be adjusted by the rotor rotational speed.

[0024] In the spheroidizing device 1, a group of powdered raw material particles of a certain size flow in from the inlet 12 along with air. The particles PM that flow into the machine along with the air during operation are drawn into the grinding grooves 21 and 22 along the airflow AF, due to the so-called Coanda effect, and come into contact with the groove surface. The particles PM that flow into the grinding grooves 21 and 22 come into contact with the round section 23 and are given rotational motion by the vortex flow VF generated within the grinding grooves 21 and 22. As the rotor 4 rotates, the particles PM in the round section 23 rotate on their own axis due to the vortex flow VF and are accelerated by centrifugal force, moving towards the inclined section 24, and rolling on the inclined surface 26 and the horizontal surface 27.

[0025] Particles PM that reach the edge of the horizontal plane 27 are drawn into the adjacent grinding grooves 21 and 22. In other words, the particles PM are rotated again by the vortex VF of the rounded section 23 and accelerated by centrifugal force. They then move along the inclined section 24, rolling towards the next groove top Z. This operation is continuously repeated as the rotor 4 rotates, and the particles PM are ground by the grinding grooves 21 and 22, gradually removing their edges. At the same time, an effect is also applied that comprehensively rounds up multiple particles PM.

[0026] In this case, the pulverizer in Patent Document 1 finely grinds particles by causing them to collide with each other in a high-speed vortex generated in a valley-shaped round section. However, the spheroidizing device 1 according to the present invention has a larger pitch P of the grinding grooves 21 and 22 compared to the device in Patent Document 1, and furthermore, long inclined sections 24 are provided between adjacent grooves. As a result, in the spheroidizing device 1, the particles PM come into contact with the inclined sections 24 on the rotating rotor surface and their edges are worn down as they roll, promoting not only fine grinding of the particles PM but also spheroidization.

[0027] Thus, in the spheroidizing device 1, the pitch P of the grinding grooves 21 and 22 is made large, and furthermore, rounded sections 23 and inclined sections 24 are provided in the grinding grooves 21 and 22, which causes and promotes particle rolling, resulting not only in the grinding and corner removal of particle PM, but also in the action of rounding up multiple particle PMs together. As these actions work synergistically, rounded particles with their corners removed, and spherical fine powder particles in which multiple particles are comprehensively rounded up are produced in the spheroidizing device 1, further spheroidizing the fine powder particles. In addition, since the spheroidizing device 1 applies the above action to the particle PM many times in a row by rotating the rotor 4 at high speed, the powder raw material can be ground and spheroidized in a short time, and unlike batch type processing where the machine is sealed for a certain period of time for processing, continuous grinding and spheroidizing processing is possible.

[0028] The present invention is not limited to the embodiments described above, and it goes without saying that various modifications are possible without departing from the spirit of the invention. The various dimensions mentioned above are merely examples of embodiments, and the present invention is not limited to these numerical values. They can be appropriately changed depending on the physical properties, particle size, and quantity of the raw materials and products. According to the inventor's experiments, for example, the radius Rg of the round portion 23 can be set in the range of 0.5 mm to 1.5 mm, preferably 0.8 mm to 1.2 mm, and the angle θ1 can be set in the range of 25° to 45°, preferably 30° to 40°, the angle θ2 in the range of 70° to 90°, preferably 75° to 85°, and the angle θ3 in the range of 5° to 20°, preferably 5° to 15°, by appropriate combinations (excluding those that cannot be geometrically combined). Furthermore, the pitch P of the grinding grooves 21 and 22 can also be changed. For example, the pitch P can be halved and the number of grooves can be doubled. In that case, in the spheroidizing device 1, the groove pitch P is larger than in conventional grinders due to the provision of the inclined portion 24. For example, the groove pitch, which was conventionally about 3 mm, can be set to about 5.0 to 15 mm depending on the device specifications.

[0029] In addition, it is possible to omit the horizontal surface 27 in the inclined portion 24 and have only the slope 26, or to omit the radial openings 25a and 25b at both ends of the rounded portion 23 and directly connect the rounded portion 23 and the inclined portion 24, or to adopt a configuration in which the rounded portion 23 extends all the way to the opening edge portion 28. Furthermore, in the above embodiment, the connecting portions X and Y and the groove top portion Z have angular edge structures, but these may also be made into an arc-shaped R shape.

[0030] On the other hand, this machine also has a crushing effect, producing fine particles with small particle size at high rotation speeds and coarser particle size at low rotation speeds. Furthermore, the particle size and spheroidizing effect of the produced fine particles can be adjusted by changing the clearance width (gap G dimension) between the liner 3 and the rotor 4. In addition, the spheroidizing device 1 according to the present invention can be water-cooled by providing a refrigerant passage in the rotor, as described in Utility Model Registration No. 3140509. Moreover, depending on the material and properties of the raw material, applying a sudden force all at once may actually destroy the particles. In such cases, depending on the situation, multiple machines may be connected and the particles may be continuously processed while applying the spheroidizing action multiple times. [Examples]

[0031] Next, we will describe examples of pulverization using the spheroidizing apparatus according to the present invention. The pulverization test results for the aforementioned spheroidizing apparatus 1 (Figures 1-4) are shown in Table 1 in comparison with those of a conventional pulverizer (Patent Document 1). In addition, particle microscope images (3000x magnification) of the examples and comparative examples are shown in Figure 5.

[0032] [Table 1]

[0033] Table 1 focuses on "bulk density (loose tap)," one of the evaluation criteria for spheroidization. The apparatus in each example and comparative example has the same inner and outer diameter of the grinding chamber, and Table 1 shows experimental examples using apparatus of the same size. In this case, the higher the bulk density value, the better the packing efficiency in a given volume, and the higher the evaluation, with the "tap" value being used as the standard for bulk density. The results in the table correspond to Example 1 and Comparative Example 1 (Example 1), and Example 2 and Comparative Example 2 (Example 2), comparing the processing results using materials of the same substance (natural graphite) with equivalent particle size. Example 3 is the result of evaluating the performance of the apparatus of the present invention alone using the same material as Example 1. Note that although the materials in Example 1 and Example 2 are the same substance, "graphite," they are treated as different materials because they originate from different places.

[0034] As can be seen from the experimental results in Table 1, the spheroidizing device 1 according to the present invention produces a higher bulk density for both loose and tapped material than conventional grinders. Specifically, the loose and tapped material density, which was 0.2057 and 0.3962 in the conventional machine, became 0.2429 and 0.4998 (Example 1) in the spheroidizing device 1, and similarly, the density, which was 0.2092 and 0.4262, became 0.2571 and 0.5174 (Example 2), showing that the spheroidizing device 1 yielded better results in both cases. Furthermore, although Example 3 is a standalone result, the particle size and peripheral speed were kept at the same level as Comparative Examples 1 and 2, and even in this case, the device of the present invention produced processed material with a better bulk density. In fact, the micrographs shown in Figure 5 also show that each example has a higher degree of sphericity compared to the comparative examples, confirming the effectiveness of the spheroidizing device according to the present invention. [Industrial applicability]

[0035] The manufacturing method of the present invention can be applied not only to toners for electrostatic image developing, but also to the spherification of electrode materials for lithium-ion secondary batteries, photocatalysts, cosmetics, food products, and various other fine particles. [Explanation of symbols]

[0036] 1 Spheronizing device 2 Outer box 3 Raina 4 rotors 5 rotations 6 keys 7 nuts 8a, 8b bearings 9 Pulley 11. Grinding Chamber 12 Entrance 13 Exit 21. Grinding groove (liner side) 22. Grinding groove (rotor side) 22a Grinding groove 22b Grinding groove 23 Round Section 23a Bottom 24 Slope 25 Radiation aperture 25a radiating aperture 25b Radiating aperture 26 Slopes 27 horizontal plane 28 Opening edge AF airflow G gap La horizontal plane length Lb Distance between connection point X and groove top Z O center line P pitch PM particles R1 Liner inner diameter radius R2 Rotor outer diameter radius Rg (Rounded section radius) S Grinding groove depth VF vortex X - Connection between the slope and the horizontal plane Y-slope and connection point on one end of the radial opening Z groove parietal θ1 Radiation aperture opening angle θ2 Angle between the radiating aperture and the inclined section θ3 Slope inclination angle

Claims

1. A powder spheroidizing apparatus comprising a liner formed in a hollow cylindrical shape with numerous grinding grooves formed on its inner circumferential surface, and a rotor concentrically disposed inside the liner with a gap between them, with numerous grinding grooves formed on its outer circumferential surface, The grinding grooves of the liner and rotor have the same cross-sectional shape. Each of the aforementioned grinding grooves has a rounded portion having an arc-shaped bottom surface and radial openings extending in the tangential direction of the arc at both ends, and an inclined portion provided on one end of the arc of the rounded portion, extending along the circumferential direction of the liner and the rotor to a size larger than the radius Rg of the rounded portion, and causing the powder drawn into the grinding groove to roll due to the vortex flow generated within the rounded portion. The radial opening is continuously connected to the inclined portion at one end, and the other end extends to the circumferential surface of the liner and the rotor, forming an opening edge that becomes the top Z of the crushing groove. The inclined portion has a slope that is positioned on the rounded portion side and continuously connected to one end of the radial opening, and a horizontal surface that is positioned on the adjacent grinding groove side, with one end continuously connected to the opening edge of the adjacent grinding groove and the other end continuously connected to the slope. The horizontal plane is arranged along a straight line L connecting adjacent head portions Z, The spheroidizing device is characterized in that the slope is inclined at an angle θ3 with respect to the straight line L from the horizontal plane toward the radial direction of the liner and the rotor.

2. In the spheroidizing apparatus according to Claim 1, The grinding groove has a connection portion Y between the radial opening and the inclined portion located radially outward from the liner or radially inward from the rotor than the straight line L. The spherical shaping device is characterized in that the inclined portion bends at the connection portion Y from the arc tangential direction of the round portion toward the radially outward side of the liner or the radially inward side of the rotor and extends along the circumferential direction.

3. In the spheroidizing apparatus according to Claim 1, The spheroidizing device is characterized in that the crushing grooves are formed with a groove pitch P between adjacent top portions Z of 5.0 to 15 mm.

4. In the spheroidizing apparatus according to claim 1, A spheroidizing device characterized in that the radius of the rounded portion is 0.5 mm to 1.5 mm, preferably 0.8 to 1.2 mm, and more preferably 1.0 mm.

5. In the spheroidizing apparatus according to claim 1, A spheroidizing device characterized in that the opening angle θ1 at both ends of the radiating opening is 25° to 45°, preferably 30° to 40°, and more preferably 35°.

6. In the spheroidizing apparatus according to claim 1, A spheroidizing apparatus characterized in that, at the opening edge, the angle θ2 between the radial opening and the inclined portion of the adjacent grinding groove is 70° to 90°, preferably 75° to 85°, and more preferably 80°.

7. In the spheroidizing apparatus according to claim 1, A spheroidizing apparatus characterized in that, at the opening edge, the radial opening and the inclined portion of the adjacent crushing groove are connected by a curved surface.

8. In the spheroidizing apparatus according to claim 1, A spheroidizing device characterized in that one end of the radiating opening and the inclined portion are connected by a curved surface.

9. In the spheroidizing apparatus according to claim 1, A spheroidizing device characterized in that the inclination angle θ3 of the slope with respect to the straight line L is 5° to 20°, preferably 5° to 15°, more preferably 10°.

10. In the spheroidizing apparatus according to claim 1, A spherification device characterized in that the aforementioned slope and the aforementioned horizontal surface are connected by a curved surface.

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