Jet mill device

Abstract

A jet mill device has: a hollow chamber for pulverizing objects to be pulverized into fine powder, the hollow chamber having an inner surface formed of a material having a hardness higher than that of the objects to be pulverized; and an airflow-generating section that generates a swirling airflow in the hollow chamber. The objects to be pulverized put into the hollow chamber are caused to swirl by the air flow generated by the airflow-generating section, the objects to be pulverized collide with each other, and the objects to be pulverized collide with the inner surface of the hollow chamber, thereby being turned into a fine powder. Even objects to be pulverized that have a high hardness can be pulverized.

Description

Technical Field

[0001] The present invention relates to a jet mill device for pulverizing a material to be pulverized into fine powder.

Background Art

[0002] As a conventional fine pulverization device, in a fine pulverization device in which a rotating body is housed in a casing having an opening formed therein, and a material to be pulverized is introduced into the casing from a cylindrical body and the material to be pulverized is pulverized into fine powder by the rotation of the rotating body, the rotating body includes a rotating blade and a rotating plate having an opening formed at the center portion, and is supported by a support frame attached to the rotation drive shaft of a drive motor with a predetermined interval in the rotation center axis direction, and a gap communicating from the opening at the center portion to the outer peripheral edge portion is formed between the rotating blade and the rotating plate. A fine pulverization device is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a conventional fine pulverization device, when trying to pulverize a material to be pulverized having high hardness and a large particle size, the rotating blades or the rotating plate may be damaged by the high-hardness material to be pulverized, or the inner surface of the casing may be scraped by the high-hardness material to be pulverized and mixed into the fine powder of the product.

[0005] An object of the present invention is to provide a jet mill device capable of pulverizing even a material to be pulverized having high hardness.

Means for Solving the Problems

[0006] A jet mill device according to one aspect of the present invention is a cavity chamber for pulverizing a material to be pulverized into fine powder, the cavity chamber having an inner surface formed of a material harder than the hardness of the material to be pulverized, and an air flow generating unit for generating an air flow that swirls within the cavity chamber, wherein the material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit and collides with the inner surface of the cavity chamber to be made into fine powder.

[0007] In the jet mill device described above, it may further have a rotating body having a flat plate-shaped rotor that rotates within the cavity chamber, the surface of the flat plate-shaped rotor being formed of a material harder than the hardness of the material to be pulverized, and the material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit and collides with the inner surface of the cavity chamber and the surface of the flat plate-shaped rotor to be made into fine powder.

[0008] In the jet mill device described above, the rotating body may be formed by alternately laminating the flat plate-shaped rotor and spacers, and the diameter of the spacers may be smaller than the diameter of the flat plate-shaped rotor.

[0009] In the jet mill device described above, a plurality of notches may be formed on the outer periphery of the flat plate-shaped rotor of the rotating body.

[0010] In the jet mill device described above, a plurality of stages of the cavity chamber and the air flow generating unit may be laminated via a partition plate, and the partition plate may have an opening for guiding the fine powder pulverized in the lower-stage cavity chamber to the upper-stage cavity chamber.

[0011] In the above-described jet mill device, at least three or more of the cavity chambers and the air flow generating section are stacked via the partition plate, and the opening of the partition plate provided between the cavity chamber and the air flow generating section of the first stage and the cavity chamber and the air flow generating section of the second stage is smaller than the opening of the partition plate provided between the cavity chamber and the air flow generating section of the second stage and the cavity chamber and the air flow generating section of the third stage.

[0012] In the above-described jet mill device, the cross-section of the lower cavity chamber may be a polygon with six or more sides, and the cross-section of the upper cavity chamber may be a polygon with less than six sides.

[0013] In the above-described jet mill device, the upper cavity chamber may be composed of a plurality of small cavity chambers, and the partition plate may have a plurality of openings for guiding the fine powder pulverized in the lower cavity chamber to the plurality of small cavity chambers in the upper stage.

[0014] In the above-described jet mill device, a diamond electrodeposited layer formed by diamond electrodeposition may be formed on the inner surface of the cavity chamber or the surface of the flat rotor.

[0015] A pulverization method according to an aspect of the present invention is a pulverization method for pulverizing an object to be pulverized into fine powder by a jet mill device having a cavity chamber for pulverizing the object to be pulverized into fine powder, the inner surface of which is formed of a material harder than the hardness of the object to be pulverized, and an air flow generating section for generating an air flow swirling in the cavity chamber, wherein the object to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating section, collides with each other, and the object to be pulverized collides with the inner surface of the cavity chamber, thereby being pulverized into fine powder.

[0016] In the above-described pulverization method, the jet mill device is a rotating body having a flat rotor that rotates in the cavity chamber, and further has a rotating body formed of a material whose surface of the flat rotor is harder than the hardness of the material to be pulverized. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, and collides with the inner surface of the cavity chamber and the surface of the flat rotor to be made into fine powder.

[0017] In the above-described pulverization method, the rotating body of the jet mill device is formed by alternately laminating the flat rotor and the spacer. The diameter of the spacer is smaller than the diameter of the flat rotor. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, and collides with the upper surface, outer peripheral surface, and lower surface of the laminated flat rotor to be made into fine powder.

[0018] In the above-described pulverization method, a plurality of notches are formed on the outer periphery of the flat rotor of the rotating body of the jet mill device. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, and collides with the plurality of notches on the outer periphery of the flat rotor to be made into fine powder.

[0019] In the above-described pulverization method, in the jet mill device, the plurality of stages of the cavity chambers and the air flow generation unit are laminated via a partition plate. The partition plate has an opening for guiding the fine powder pulverized in the lower cavity chamber to the upper cavity chamber. The material to be pulverized is introduced into the lower cavity chamber. The material to be pulverized introduced into the lower cavity chamber is swirled by the air flow generated by the lower air flow generation unit, collides with each other, and collides with the inner surface of the cavity chamber to be made into fine powder. The fine powder pulverized in the lower cavity chamber is guided to the upper cavity chamber through the opening of the partition plate. The material to be pulverized guided into the upper cavity chamber is swirled by the air flow generated by the upper air flow generation unit, collides with each other, and collides with the inner surface of the cavity chamber to be made into even finer powder.

[0020] In the above-described pulverization method, the upper cavity chamber of the jet mill device is composed of a plurality of small cavity chambers. The partition plate has a plurality of openings for guiding the fine powder pulverized in the lower cavity chamber to the plurality of small cavity chambers in the upper stage. The fine powder pulverized in the lower cavity chamber is guided to the plurality of small cavity chambers in the upper cavity chamber through the plurality of openings of the partition plate. The material to be pulverized guided into the plurality of small cavity chambers in the upper cavity chamber is swirled by the air flow generated by the upper air flow generation unit, collides with each other, and collides with the inner surface of the cavity chamber to be made into even finer powder.

[0021] In the above-described pulverization method, a diamond electrodeposited layer formed by diamond electrodeposition processing is formed on the inner surface of the cavity chamber of the jet mill device or the surface of the flat rotor. The material to be pulverized introduced into the cavity chamber may be made into fine powder by colliding with the diamond electrodeposited layer formed on the inner surface of the cavity chamber or the surface of the flat rotor.

Advantages of the Invention

[0022] As described above, according to the present invention, there is provided a cavity chamber for pulverizing a material to be pulverized into fine powder, the cavity chamber having an inner surface formed of a material harder than the hardness of the material to be pulverized, and an air flow generating unit for generating a swirling air flow in the cavity chamber. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit and collides with the inner surface of the cavity chamber to be pulverized into fine powder. Therefore, even a material to be pulverized with high hardness can be pulverized.

Brief Description of the Drawings

[0023]

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[0024] [First Embodiment] The jet mill apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 9.

[0025] (Configuration of Jet Mill Apparatus) The configuration of the jet mill apparatus according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a view showing the appearance of the jet mill apparatus according to the present embodiment, FIG. 1(a) is a plan view of the jet mill apparatus, and FIG. 1(b) is a front view of the jet mill apparatus. FIG. 2 is a view showing the main part of the jet mill apparatus according to the present embodiment, FIG. 2(a) is a cross-sectional view of the main part of the jet mill apparatus, and FIG. 2(b) is a longitudinal sectional view of the main part of the jet mill apparatus.

[0026] The jet mill apparatus 10 of the present embodiment includes a rectangular parallelepiped base portion 20, a cylindrical pulverizing portion 30 provided on the base portion 20 for pulverizing an object to be pulverized into fine powder, and an input / output portion 50 provided on the pulverizing portion 30 for inputting the object to be pulverized into the pulverizing portion 30 and outputting the pulverized fine powder from the pulverizing portion 30.

[0027] Inside the pulverizing section 30, a cavity chamber 31 where the material to be pulverized is pulverized is provided. The input / output section 50 inputs the material to be pulverized into the cavity chamber 31 of the pulverizing section 30 and takes out the pulverized fine powder from the cavity chamber 31 of the pulverizing section 30.

[0028] (Base section) The base section of the jet mill device according to this embodiment will be described with reference to Fig. 1(b).

[0029] At the lower part of the base section 20, a compressed air tank 22 for sending compressed air into the cavity chamber 31 of the pulverizing section 30 is provided. A compressed air connection port 24 is formed at the center of the lower part of the compressed air tank 22. A compressor (not shown) for generating compressed air is connected to the compressed air connection port 24. A plurality of compressed air feed pipes 26 for connecting the compressed air tank 22 of the base section 20 and the cavity chamber 31 of the pulverizing section 30 are provided. In Fig. 1(b), the illustration of the compressed air feed pipe 26 is omitted.

[0030] The compressed air generated by a compressor (not shown) is sent from the compressed air connection port 24 to the compressed air tank 22 and then sent to the cavity chamber 31 of the pulverizing section 30 through the compressed air feed pipe 26.

[0031] A rotary drive motor 28 is provided at the upper part of the base section 20. The rotary drive motor 28 rotates a flat rotor laminate 32 inside the pulverizing section 30, which will be described later.

[0032] (Pulverizing section: Flat rotor laminate (rotating body)) The flat rotor laminate of the jet mill device according to this embodiment will be described with reference to Figs. 2, 3, and 4. Fig. 2 is a diagram showing the main part of the jet mill device according to this embodiment, Fig. 2(a) is a cross-sectional view of the main part of the jet mill device, and Fig. 2(b) is a longitudinal sectional view of the main part of the jet mill device. Fig. 3 is a diagram showing the flat rotor of the jet mill device according to this embodiment, and Fig. 4 is a diagram showing the spacer ring of the jet mill device according to this embodiment.

[0033] A flat plate-shaped rotor laminate 32 is provided at the center of the cavity chamber 31 of the crushing section 30. The flat plate-shaped rotor laminate 32 is formed by alternately laminating flat plate-shaped rotors 34 and spacer rings 36. As a result, a plurality of the flat plate-shaped rotors 34 are laminated with a predetermined interval, which is the thickness of the spacer ring 36, therebetween.

[0034] The flat plate-shaped rotor 34 is shown in FIG. 3. FIG. 3(a) is a plan view of the flat plate-shaped rotor 34, and FIG. 3(b) is a cross-sectional view taken along line A-A of the flat plate-shaped rotor 34.

[0035] The flat plate-shaped rotor 34 has a disc shape, and a through hole 34a through which the rotating shaft of the driving motor 28 for rotation passes is formed at the center. The diameter of the flat plate-shaped rotor 34 is, for example, 240 mm. The thickness of the flat plate-shaped rotor 34 is, for example, 18 mm. The material of the flat plate-shaped rotor 34 is, for example, S45C (carbon steel material). The diameter of the through hole 34a is, for example, 25 mm.

[0036] Diamond electroplating is performed on all regions of the flat plate-shaped rotor 34 except for the circular central region 34b where the spacer ring 36 contacts, and a diamond electroplated layer 34d is formed on the surface of that region.

[0037] The diameter of the central region 34b is, for example, 125 mm. Six through holes 34c for laminating with the spacer ring 36 are formed in the central region 34b. The diameter of the through hole 34c is, for example, 8 mm.

[0038] The flat plate-shaped rotor 34 is characterized in that diamond electroplating is performed on all regions except the central region 34b and a diamond electroplated layer 34d is formed.

[0039] Diamond electroplating is a process applied to, for example, diamond electroplated tools. For example, as shown in Fig. 3(c), diamond abrasive grains or CBN abrasive grains 35c are fixed to a nickel plating layer 35b by electroplating on a base metal (parent material) 35a. CBN is a substance with hardness second only to diamond and is a compound composed of boron and nitrogen called cubic Boron Nitride.

[0040] The base metal (parent material) 35a of the flat rotor 34 in this embodiment is, for example, S45C (carbon steel material), and diamond abrasive grains or CBN abrasive grains 35c are fixed to a nickel plating layer 35b by, for example, nickel plating. The thickness of the nickel plating layer 35b is, for example, 50 μm, and the particle size of the diamond abrasive grains or CBN abrasive grains 35c is, for example, 100 μm. The density of the diamond abrasive grains or CBN abrasive grains 35c is, for example, 100 grains / mm 2 is.

[0041] The diamond electroplated layer 34d is composed of a plating layer 35b and diamond abrasive grains or CBN abrasive grains 35c as shown in Fig. 3(c).

[0042] The spacer ring 36 is shown in Fig. 4. Fig. 4(a) is a plan view of the spacer ring 36, and Fig. 4(b) is a cross-sectional view taken along line A-A of the spacer ring 36.

[0043] The spacer ring 36 is disc-shaped, and a through hole 36a through which the rotation shaft of the drive motor 28 for rotation passes is formed in the center. The diameter of the spacer ring 36 is, for example, 120 mm. The thickness of the spacer ring 36 is, for example, 10 mm. The material of the spacer ring 36 is, for example, SUS316 (stainless steel). The diameter of the through hole 36a is, for example, 25 mm.

[0044] Six through holes 36c for laminating in the central region 34b of the flat rotor 34 are formed in the spacer ring 36. The diameter of the through hole 36c is, for example, 8 mm.

[0045] The flat plate-shaped rotors 34 shown in FIG. 3 and the spacer rings 36 shown in FIG. 4 are alternately laminated to form a flat plate-shaped rotor laminate 32. The six through-holes 34c of the flat plate-shaped rotor 34 and the six through-holes 36c of the spacer ring 36 are aligned, and rods (not shown) are respectively passed through the six aligned through-holes 34c, 36c, and tightened from the upper and lower ends of the rods (not shown) to form a rigid flat plate-shaped rotor laminate 32.

[0046] In the present embodiment, for example, as shown in FIG. 2(b), eight flat plate-shaped rotors 34 and nine spacer rings 36 are alternately laminated to form a flat plate-shaped rotor laminate 32.

[0047] The rotating shaft of the driving motor 28 for rotation is passed through the through-holes 34a, 36a of the flat plate-shaped rotor laminate 32, and the flat plate-shaped rotor laminate 32 is placed in the cavity chamber 31 of the pulverizing section 30 as shown in FIG. 2(b).

[0048] (Pulverizing section: Fixed ring laminate (air flow generating section)) The fixed ring laminate of the jet mill apparatus according to the present embodiment will be described with reference to FIGS. 5, 6, 7, 8, and 9. FIG. 5 is a view showing the underplate of the jet mill apparatus according to the present embodiment. FIG. 6 is a view showing the under guide ring of the jet mill apparatus according to the present embodiment. FIG. 7 is a view showing the jet ring of the jet mill apparatus according to the present embodiment. FIG. 8 is a view showing the guide ring of the jet mill apparatus according to the present embodiment. FIG. 9 is a view showing the diamond electroplated plate of the jet mill apparatus according to the present embodiment.

[0049] A fixed ring laminate 40 is provided around the flat plate-shaped rotor laminate 32 at the center of the cavity chamber 31 of the pulverizing section 30. The fixed ring laminate 40 defines a cavity chamber 31 which is a pulverizing space for pulverizing the object to be pulverized.

[0050] The fixed ring laminate 40 is composed of an underplate guide ring 42A that surrounds an underplate 42 provided at the bottom of the cavity chamber 31 of the pulverizing section 30, an under guide ring 43 provided on the underplate guide ring 42A, a jet ring 44 provided on the under guide ring 43, and a guide ring 46 laminated on the jet ring 44. A plurality of diamond electroplated plates 48 are laid on the side wall of the cavity chamber 31 formed by the under guide ring 43, the jet ring 44, and the guide ring 46.

[0051] The underplate 42 is shown in Fig. 5. Fig. 5(a) is a plan view of the underplate 42, and Figs. 5(b) and 5(c) are cross-sectional views of the underplate 42 taken along the line A-A.

[0052] Note that the bottom of the cavity chamber 31 of the pulverizing section 30 is composed of two parts (the underplate 42 and the underplate guide ring 42A) such that the outer periphery of the underplate 42 is surrounded by the underplate guide ring 42A. By making the underplate 42 replaceable, the diamond particle size at the bottom of the cavity chamber 31 can be easily changed.

[0053] The underplate 42 is a circular plate with an opening 42a formed at the center. In the region 42c outside the opening 42a of the underplate 42, diamond electroplating is performed, and as shown in Fig. 5(c), a diamond electroplated layer 42b is formed on the surface of the region 42c. Six screw holes 42d are formed in the outermost peripheral region of the underplate 42.

[0054] The diamond electroplating is, as described with reference to Fig. 3(c), for example, the processing applied to a diamond electroplating tool. The diamond electroplated layer 42b is also composed of a plating layer 35b and diamond abrasive grains or CBN abrasive grains 35c as shown in Fig. 3(c).

[0055] The under-guide ring 43 is shown in Fig. 6. Fig. 6(a) is a plan view of the under-guide ring 43, and Fig. 6(b) is a sectional view taken along line A-A of the under-guide ring 43.

[0056] The under-guide ring 43 is composed of a donut-shaped under-guide ring body 43a. Diamond electroplating is applied to the inner surface of the under-guide ring body 43a, and a diamond electroplated layer 43b is formed on the inner surface. Six through holes 43d are formed in the outermost peripheral region of the under-guide ring 43.

[0057] The diamond electroplating process is, as described with reference to Fig. 3(c), for example, a process applied to a diamond electroplating tool. The diamond electroplated layer 43b is also composed of a plating layer 35b and diamond abrasive grains or CBN abrasive grains 35c as shown in Fig. 3(c).

[0058] In order to stack the jet ring 44 on the under-guide ring 43 in a correctly fitted position, a recess 43c is formed on the upper surface of the under-guide ring body 43a.

[0059] A plurality of through holes 43d are formed in the under-guide ring 43 for stacking the jet ring 44 on the donut-shaped under-guide ring body 43a.

[0060] The jet ring 44 is shown in Fig. 7. Fig. 7(a) is a plan view of the jet ring 44, and Fig. 7(b) is a sectional view taken along line A-A of the jet ring 44.

[0061] A plurality of injection nozzles 44b are provided on the donut-shaped jet ring body 44a of the jet ring 44. For example, in Fig. 7(a), twelve injection nozzles 44b are provided at intervals of about 30 degrees. The plurality of injection nozzles 44b generate a swirling air flow in the cavity chamber 31.

[0062] The injection nozzle 44b has an injection port 44c with a diameter of, for example, 1.0 mm and a length of 20.0 mm. The injection port 44c of the injection nozzle 44b is inclined, for example, 30 degrees to the right from a straight line passing through the center of the jet ring body 44a. The air injected from the injection port 44c of the injection nozzle 44b generates a counterclockwise swirling flow in the cavity chamber 31.

[0063] When the inclination of the injection port 44c of the injection nozzle 44b is indicated by the angle θ from the straight line passing through the center of the jet ring body 44a, it is desirable that the angle θ be within the range of about 30 degrees to about 60 degrees. Fig. 7(a) shows the case where the inclination angle θ of the injection port 44c of all the injection nozzles 44b is 60 degrees. When the inclination angle θ of the injection port 44c of the injection nozzle 44b is 30 degrees, the inclination is as shown by the rightmost injection nozzle 44b in Fig. 7(a).

[0064] In order to fit and stack the jet ring 44 in the correct position when stacking, a convex portion 44e is formed on the lower surface of the jet ring body 44a. During stacking, the convex portion 44e of the jet ring 44 located above fits with the concave portion 43c of the under-guide ring 43 located below.

[0065] A plurality of through holes 44d for stacking the guide ring 46 are formed in the donut-shaped jet ring body 44a of the jet ring 44.

[0066] The guide ring 46 is shown in Fig. 8. Fig. 8(a) is a plan view of the guide ring 46, and Fig. 8(b) is a cross-sectional view taken along line A-A of the guide ring 46.

[0067] The guide ring 46 consists of a donut-shaped guide ring body 46a. In order to fit and stack the guide ring 46 in the correct position when stacking, a concave portion 46b is formed on the upper surface of the guide ring body 46a, and a convex portion 46c is formed on the lower surface. During stacking, the convex portion 46c of the guide ring 46 located above fits with the concave portion 46b of the guide ring 46 located below.

[0068] The guide ring 46 is formed with a plurality of through holes 46d for laminating the guide ring 46 on the donut-shaped guide ring body 46a.

[0069] To form the fixed ring laminate 40, the under guide ring 43 is laminated on the underplate guide ring 42A surrounding the underplate 42, the jet ring 44 is laminated on the under guide ring 43, the guide ring 46 is laminated on the jet ring 44, the guide ring 46 is laminated on the guide ring 46, and this is repeated to laminate a plurality of guide rings 46.

[0070] In this way, the cavity chamber 31 is formed by the under guide ring 43, the jet ring 44, and the plurality of guide rings 46.

[0071] In this embodiment, the diamond electroplated plate 48 is spread over the entire side wall of the cavity chamber 31 formed in this way like tiles.

[0072] The diamond electroplated plate 48 consists of a rectangular plate body 48a. The plate body 48a has a rectangular shape with a width of 70 mm and a length of 200 mm, for example, and a thickness of 8 mm.

[0073] As shown in Fig. 9(c), diamond electroplating is performed on both sides of the diamond electroplated plate 48. In this embodiment, diamond electroplating with different grain sizes is performed on both sides of the diamond electroplated plate 48 to form the diamond electroplated layer 48b and the diamond electroplated layer 48c.

[0074] The diamond electroplating is, as described with reference to Fig. 3(c), for example, the processing applied to the diamond electroplating tool. The diamond electroplated layer 48b and the diamond electroplated layer 48c are also composed of a plating layer 35b and diamond abrasive grains or CBN abrasive grains 35c as shown in Fig. 3(c).

[0075] In the diamond electroplated layer 48b on one surface of the diamond electroplated plate 48, the thickness of the nickel plating layer 35b is, for example, 50 μm, and the particle size of the diamond abrasive grains or CBN abrasive grains 35c is, for example, 100 μm. The density of the diamond abrasive grains or CBN abrasive grains 35c is, for example, 100 grains / mm 2 is.

[0076] In the diamond electroplated layer 48c on the other surface of the diamond electroplated plate 48, the thickness of the nickel plating layer 35b is, for example, 25 μm, and the particle size of the diamond abrasive grains or CBN abrasive grains 35c is, for example, 50 μm. The density of the diamond abrasive grains or CBN abrasive grains 35c is, for example, 400 grains / mm 2 is.

[0077] Note that in this embodiment, the diamond electroplated plates 48 are spread like tiles on the entire side wall of the cavity chamber 31. However, without using the diamond electroplated plates 48, the inner wall surface of the guide ring 46 may be processed with a diamond electroplated layer.

[0078] (Input / output section) The input / output section 50 of the jet mill device according to this embodiment will be described with reference to FIGS. 1 and 2.

[0079] As shown in FIG. 1, on the pulverizing section 30, there is provided an input / output section 50 that inputs the material to be pulverized into the cavity chamber 31 of the pulverizing section 30 and outputs the pulverized fine powder from the cavity chamber 31 of the pulverizing section 30.

[0080] The input / output section 50 is provided with a raw material input pipe 52 for charging the material to be pulverized into the cavity chamber 31 of the pulverizing section 30 and a fine powder discharge port 54 for discharging the pulverized fine powder.

[0081] A mesh section 56 is provided at the connection portion between the fine powder discharge port 54 and the cavity chamber 31 of the pulverizing section 30. The mesh section 56 is formed with a predetermined density. Thereby, fine powder pulverized to a particle size below a predetermined density can be taken out to the outside.

[0082] (Operation of the jet mill device) The operation of the jet mill device according to this embodiment will be described.

[0083] First, an air compressor (not shown) that generates compressed air is operated, and the compressed air in the compressed air tank 22 is sent through the compressed air connection port 24. The compressed air is sent to the pulverizing section 30 through the compressed air supply pipe 26, and is ejected from a plurality of injection nozzles 44b provided in the jet ring 44 that constitutes the fixed ring laminate 40, generating a swirling air flow in the cavity chamber 31.

[0084] At the same time, the rotary drive motor 28 of the base portion 20 is driven to rotate the flat rotor laminate 32 in the pulverizing section 30 at high speed. The rotation direction of the flat rotor laminate 32 is the same as the swirling direction of the swirling air flow in the cavity chamber 31 by the plurality of injection nozzles 44b.

[0085] The reason for setting the rotation direction of the flat rotor laminate 32 to be the same as the swirling direction of the swirling air flow in the cavity chamber 31 is as follows. First, by setting them in the same direction, the speed of the swirling flow is amplified. Second, by setting them in the same direction, the impact on the diamond increases. Third, since the speed of the swirling flow is amplified, the material to be pulverized (particles) contacts the diamond electrodeposited layer efficiently. Fourth, by setting them in the same direction, particles with a large particle diameter tend to move downward, and particles with a small particle diameter tend to move upward.

[0086] Next, the material to be pulverized is introduced into the cavity chamber 31 of the pulverizing section 30 from the raw material input pipe 52 of the input / output section 50. The introduced material to be pulverized swirls in the cavity chamber 31 along the swirling flow formed in the cavity chamber 31. The swirling material to be pulverized collides with the underplate 42, under guide ring 43, diamond electrodeposited plate 48 on the side wall of the cavity chamber 31, or the flat rotor 34 of the flat rotor laminate 32 in the cavity chamber 31, or collides with each other among the materials to be pulverized, and is pulverized into fine powder.

[0087] Even if the material to be pulverized has high hardness, the flat-plate rotor laminate 32 is formed by laminating flat-plate rotors 34, and since a diamond electrodeposited layer 34d is formed in a region other than the central region 34b of the flat-plate rotor 34, the flat-plate rotor 34 will not be damaged even if the material to be pulverized collides with it.

[0088] Also, a diamond electrodeposited layer 42b is formed on the surface of the region 42c of the underplate 42 where the material to be pulverized collides, a diamond electrodeposited layer 43b is formed on the inner surface of the under guide ring body 43a where the material to be pulverized collides, a diamond electrodeposited layer 48b or a diamond electrodeposited layer 48c is formed on the surface of the diamond electrodeposited plate 48 where the material to be pulverized collides, and a diamond electrodeposited layer 34d is formed in a region other than the central region 34b of the flat-plate rotor 34 where the material to be pulverized collides. Therefore, even if the material to be pulverized collides, the diamond electrodeposited layers 42b, 43b, 48b, 48c will not be scraped off and mixed into the fine powder of the product.

[0089] The pulverized fine powder rides on the swirling flow and swirls at high speed in the cavity chamber 31, rising in the cavity chamber 31 like a tornado. Among the swirling and rising fine powder, the fine powder with a particle size finer than the density of the mesh portion 56 provided at the connection portion with the cavity chamber 31 passes through the mesh portion 56 and is discharged to the outside from the fine powder discharge port 54, and is recovered as the fine powder of the product.

[0090] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0091] [Second Embodiment] The jet mill device according to the second embodiment of the present invention will be described with reference to FIGS. 10 to 12.

[0092] The jet mill device of this embodiment is an improvement of the rotor and jet ring in the jet mill device of the first embodiment of the present invention. Other configurations are the same as those of the jet mill device of the first embodiment of the present invention.

[0093] (Grinding section: Rotor (rotating body)) The rotor of the jet mill device according to this embodiment will be described with reference to FIG. 10.

[0094] The flat rotor 37 for forming the rotor of this embodiment is shown in FIG. 10. FIG. 10(a) is a plan view of the flat rotor 37, and FIG. 10(b) is a cross-sectional view taken along line A-A of the flat rotor 37.

[0095] The flat rotor 37 is substantially circular, and a through hole 37a through which the rotating shaft of the driving motor 28 for rotation passes is formed at the center, and six through holes 37e for attaching the spacer ring 36 as shown in FIG. 4 are formed around it. The flat rotor 37 and the spacer ring 36 are alternately laminated to form a flat rotor laminate 38 similar to the flat rotor laminate 32.

[0096] The flat rotor 37 of this embodiment is characterized in that notches are formed on the outer periphery. The outer periphery of the flat rotor 37 is alternately formed with a flat portion 37b and a notch portion 37c, and notches are formed at 12 locations on the entire outer periphery, and the cross section has a shape like a shuriken. The depth of the notch portion 37c is, for example, 10 mm.

[0097] A diamond electrodeposited layer 37d is formed on the surfaces of the flat portion 37b and the notch portion 37c. The diamond electrodeposited layer 37d is composed of a plating layer 35b and diamond abrasive grains or CBN abrasive grains 35c as shown in FIG. 3(c).

[0098] Since the diamond electrodeposited layer 37d is formed over the entire outer peripheral surface of the flat rotor laminate 38 formed by laminating the flat rotors 37, the wear resistance is improved. When the flat rotor laminate 38 rotates at high speed, the notch portion 37c formed on the outer periphery of each flat rotor 37 of the flat rotor laminate 38 amplifies the speed of the swirling flow in the cavity chamber 31 of the grinding section 30. The material to be ground swirling due to the swirling flow collides with the notch portion 37c of each flat rotor 37 of the flat rotor laminate 38 and is also ground by the impact.

[0099] Note that instead of the flat rotor laminate 38 in which the flat rotors 37 and the spacer rings 36 are alternately laminated, it may be a columnar rotating body that is columnar as a whole and has notches formed on its outer periphery.

[0100] (Crushing section: Jet ring (air flow generation section)) The jet ring of the jet mill device according to the present embodiment will be described with reference to FIG. 11. FIG. 11 is a cross-sectional view of the jet ring of the jet mill device according to the present embodiment.

[0101] The jet ring 45 of the present embodiment is characterized in that, as shown in FIG. 11, its inner surface is not circular but, for example, a dodecahedron shape.

[0102] The jet ring 45 is shown in FIG. 11. FIG. 11(a) is a plan view of the jet ring 45, and FIG. 11(b) is a cross-sectional view taken along line A-A of the jet ring 45.

[0103] The jet ring 45 is provided with a plurality of injection nozzles 45b on a donut-shaped jet ring body 45a. For example, in FIG. 11(a), 12 injection nozzles 45b are provided at intervals of about 30 degrees. A swirling air flow is generated in the cavity chamber 31 by the plurality of injection nozzles 45b.

[0104] The injection nozzle 45b has, for example, an injection port 45c with a diameter of 1.0 mm and a length of 20.0 mm. The injection port 45c of the injection nozzle 45b is inclined, for example, 30 degrees to the right from a straight line passing through the center of the jet ring body 45a. The air injected from the injection port 45c of the injection nozzle 45b generates a counterclockwise swirling flow in the cavity chamber 31.

[0105] When the inclination of the injection port 45c of the injection nozzle 45b is indicated by an angle θ from a straight line passing through the center of the jet ring body 45a, it is desirable that the angle θ is within the range of about 30 degrees to about 60 degrees. FIG. 11(a) shows the case where the inclination angle θ of the injection port 45c of all the injection nozzles 45b is 30 degrees.

[0106] In order to stack the jet rings 45 in a correct position and stack them, a convex portion 45g is formed on the lower surface of the jet ring body 45a. During stacking, the convex portion 45g of the jet ring 45 located above fits into the concave portion 43c of the under guide ring 43 located below.

[0107] The jet ring 45 is formed with a plurality of through holes 45d for stacking the guide ring 46 on the donut-shaped jet ring body 45a.

[0108] The jet ring 45 of the present embodiment has an icosahedral shape whose inner surface is composed of 12 flat portions 45e. A diamond electrodeposited layer 45f is formed on the surface of the flat portion 45e of the jet ring 45. The diamond electrodeposited layer 45f is composed of a plating layer 35b and diamond abrasive grains or CBN abrasive grains 35c as shown in Fig. 3(c).

[0109] Since the diamond electrodeposited layer 45f is formed over the entire inner surface of the jet ring 45, the wear resistance is improved. The material to be pulverized that swirls due to the swirling flow in the cavity chamber 31 of the pulverizing section 30 collides with the icosahedron on the inner surface of the jet ring 45 and is also pulverized by the impact.

[0110] (Operation of the jet mill device) The operation of the jet mill device according to the present embodiment will be described.

[0111] First, an air compressor (not shown) that generates compressed air is operated, and compressed air is ejected from a plurality of injection nozzles 45b provided in the jet ring 45 to generate a swirling air flow in the cavity chamber 31.

[0112] The main part of the jet mill device according to the present embodiment is shown in Fig. 12. A flat rotor laminate 38 in which the flat rotor 37 shown in Fig. 10 is laminated in the cavity chamber 31 in the jet ring 45 shown in Fig. 11 is housed.

[0113] Drive the rotation drive motor 28 of the base portion 20 to rotate the flat rotor laminate 38 in the cavity chamber 31 of the pulverizing portion 30 at high speed. The rotation direction of the flat rotor laminate 38 is the same as the swirling direction of the air flow swirling in the cavity chamber 31 by the plurality of injection nozzles 45b of the jet ring 45.

[0114] The reason for setting the rotation direction of the flat rotor laminate 38 to be the same as the swirling direction of the air flow swirling in the cavity chamber 31 is as follows. First, by making them the same direction, the speed of the swirling flow is amplified. Second, by making them the same direction, the impact on the diamond increases. Third, since the speed of the swirling flow is amplified, the material to be pulverized (particles) efficiently contacts the diamond electrodeposited layer. Fourth, by making them the same direction, particles with a large particle diameter tend to move downward, and particles with a small particle diameter tend to move upward.

[0115] The straight-through air jetted from the jet orifice 45c of the injection nozzle 45b of the jet ring 45 attracts the material to be pulverized and collides with the flat surface portion 37b of the flat rotor laminate 38. Since the flat rotor laminate 38 is rotating, the collision angle of the straight-through air against the flat surface portion 37b is constantly changing. Therefore, the direction of the air reflected by the flat surface portion 37b of the flat rotor laminate 38 also constantly changes and collides with the flat surface portion 45e of the dodecahedron of the jet ring 45. Thereby, the material to be pulverized carried by the air is efficiently pulverized into fine powder.

[0116] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0117] [Third Embodiment] The jet mill device according to the third embodiment of the present invention will be described with reference to FIG. 13. FIG. 13 is a longitudinal sectional view of the jet mill device 110 of this embodiment.

[0118] (Configuration of Jet Mill Device) The jet mill device 110 of this embodiment includes a base portion 120, a cylindrical pulverizing portion 130 provided on the base portion 120 for pulverizing the material to be pulverized into fine powder, and an input / output portion 150 provided on the pulverizing portion 130 for inputting the material to be pulverized into the pulverizing portion 130 and outputting the pulverized fine powder from the pulverizing portion 130.

[0119] Inside the pulverizing portion 130, a cavity chamber 140 where the pulverization process of the material to be pulverized is performed is provided. The input / output portion 150 inputs the material to be pulverized into the cavity chamber 140 of the pulverizing portion 130 and takes out the pulverized fine powder from the cavity chamber 140 of the pulverizing portion 130.

[0120] (Base portion) In the base portion 120 of the jet mill device according to this embodiment, a compressed air tank (not shown) for sending compressed air into the cavity chamber 140 of the pulverizing portion 130 is provided. A compressed air connection port 124 is formed in the compressed air tank (not shown). A compressor (not shown) for generating compressed air is connected to the compressed air connection port 124.

[0121] The compressed air generated by the compressor (not shown) is sent from the compressed air connection port 124 to the pulverizing portion 130.

[0122] (Pulverizing portion (air flow generating portion)) The pulverizing portion 130 of the jet mill device according to this embodiment is composed of an underplate 131 provided at the bottom of the cavity chamber 140, a jet ring 132 provided on the underplate 131, and a partition plate 133 provided on the jet ring 132.

[0123] The jet ring 132 has the same configuration as the jet ring 44 of the first embodiment shown in FIG. 7. A plurality of injection nozzles 132b are provided on the donut-shaped jet ring body 132a of the jet ring 132. For example, in FIG. 7(a), 12 injection nozzles 132b are provided at intervals of about 30 degrees. A swirling air flow is generated in the cavity chamber 140 by the plurality of injection nozzles 132b.

[0124] The shape and arrangement of the injection nozzle 132b are the same as those of the injection nozzle 44b of the jet ring 44 in the first embodiment shown in FIG. 7.

[0125] Such a jet ring 132 is sandwiched between the underplate 131 and the partition plate 133 to form a cavity chamber 140 in the pulverizing section 130.

[0126] An opening 133a is formed at the center of the partition plate 133. The diameter of the opening 133a is R1. Through the opening 133a with a diameter of R1 in the partition plate 133, the material to be pulverized is input from the input / output section 150 into the pulverizing section 130, and the pulverized fine powder is output from the pulverizing section 130 to the input / output section 150.

[0127] Diamond electroplating is performed on all regions of the inner surface of the cavity chamber 140 in the pulverizing section 130, and a diamond electroplated layer 132c is formed on the surface of that region.

[0128] (Input / Output Section) As shown in FIG. 13, an input / output section 150 for inputting the material to be pulverized into the cavity chamber 140 of the pulverizing section 130 and outputting the pulverized fine powder from the cavity chamber 140 of the pulverizing section 130 is provided on the pulverizing section 130.

[0129] The input / output section 150 is provided with a raw material input pipe 152 for injecting the material to be pulverized into the cavity chamber 140 of the pulverizing section 130 and a fine powder discharge port 154 for discharging the pulverized fine powder. The raw material input pipe 152 passes through the opening 133a at the center of the partition plate 133 of the pulverizing section 130, and its lower end reaches into the cavity chamber 140.

[0130] Although a mesh for allowing only fine powder with a particle size finer than a predetermined particle size to pass through is not provided at the connection portion between the input / output section 150 and the cavity chamber 140, the opening 133a with a diameter of R1 at the center of the partition plate 133 serves that function.

[0131] When the pulverized fine powder in the cavity chamber 140 of the pulverizing section 130 is rapidly rotated by the swirling air flow, the particle size distribution of the fine powder in the cavity chamber 140 becomes a distribution where the central part is fine and the periphery is coarse, that is, a distribution where the particle diameter of the central fine powder is small and the particle diameter of the peripheral fine powder is large.

[0132] Since the fine powder is output from the cavity chamber 140 to the input / output section 150 through the opening 133a with a diameter R1 at the center of the partition plate 133, in the input / output section 150, based on the particle size distribution of the fine powder in the cavity chamber 140, only the fine particle size within the range of the opening 133a with a diameter R1, that is, the fine powder with a small particle diameter, is discharged from the fine powder discharge port 54 to the outside and recovered as the fine powder as a product.

[0133] (Operation of the jet mill device) The operation of the jet mill device according to this embodiment will be described.

[0134] First, operate a compressor (not shown) that generates compressed air, and send the compressed air of a compressed air tank (not shown) through the compressed air connection port 124. The compressed air is sent to the pulverizing section 130 and ejected from a plurality of injection nozzles 132b provided in the jet ring 132 to generate a swirling air flow in the cavity chamber 140.

[0135] Next, feed the material to be pulverized from the raw material input pipe 152 of the input / output section 150 into the cavity chamber 140 of the pulverizing section 130. The fed material to be pulverized rides on the swirling flow formed in the cavity chamber 140 and swirls inside the cavity chamber 140. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 132c formed on the inner surface of the cavity chamber 140 of the pulverizing section 130 or by colliding with each other.

[0136] Since the diamond electrodeposited layer 132c is formed on the inner surface of the cavity chamber 140 where the material to be pulverized collides, even if the material to be pulverized collides, the diamond electrodeposited layer 132c will not be scraped off and mixed into the fine powder of the product.

[0137] The pulverized fine powder rides on the swirling flow and swirls rapidly inside the cavity chamber 140, rising within the cavity chamber 140. The swirling and rising fine powder passes through the opening 133a at the center of the partition plate 133 and is discharged to the outside from the fine powder discharge port 154, and is recovered as the fine powder as a product.

[0138] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0139] [Fourth Embodiment] The jet mill device according to a modification of the fourth embodiment of the present invention will be described with reference to FIG. 14. The jet mill device of this embodiment is an improvement of the shape of the cavity chamber of the pulverizing section in the jet mill device of the third embodiment of the present invention. Other configurations are the same as those of the jet mill device of the third embodiment of the present invention.

[0140] (Configuration of Jet Mill Device) The jet mill device 110 of this embodiment includes a base portion 120, a cylindrical pulverizing section 130 provided on the base portion 120 for pulverizing the object to be pulverized into fine powder, and an input / output section 150 provided on the pulverizing section 130 for inputting the object to be pulverized into the pulverizing section 130 and outputting the pulverized fine powder from the pulverizing section 130.

[0141] A cavity chamber 140 where the pulverization process of the object to be pulverized is performed is provided inside the pulverizing section 130. The input / output section 150 inputs the object to be pulverized into the cavity chamber 140 of the pulverizing section 130 and takes out the pulverized fine powder from the cavity chamber 140 of the pulverizing section 130.

[0142] (Pulverizing Section (Air Flow Generation Section)) The pulverizing section 130 of the jet mill device according to this embodiment is composed of an underplate 131 provided at the bottom, a jet ring 132 provided on the underplate 131, and a partition plate 133 provided on the jet ring 132.

[0143] The upper surface of the underplate 131 in this embodiment is not flat, but has a mortar bowl shape in which the center is the lowest and the periphery farther from the center is higher, as shown in FIG. 14. The lower surface of the partition plate 133 is not flat, but has an inverted mortar bowl shape in which the center is the lowest and the periphery farther from the center is higher, symmetrically to the upper surface of the underplate 131, as shown in FIG. 14.

[0144] Therefore, the cavity chamber 140 of the pulverization section 130 defined by the upper surface of the underplate 131 and the lower surface of the partition plate 133 has a so-called abacus ball shape in which the center is thick and the periphery is thin, as shown in FIG. 14.

[0145] The position of the thinnest part of the abacus ball-shaped cavity chamber 140 is configured to coincide with the positions of the plurality of injection nozzles 132b in the jet ring 132. Air from the plurality of injection nozzles 132b is injected into the so-called abacus ball-shaped cavity chamber 140. The plurality of injection nozzles 132b form a swirling air flow in the cavity chamber 140.

[0146] Also in this embodiment, as shown in FIG. 14, diamond electroplating is performed on all regions of the inner surface of the cavity chamber 140 of the pulverization section 130, and a diamond electroplated layer 132c is formed on the surface of that region.

[0147] (Operation of the jet mill device) The operation of the jet mill device according to this embodiment will be described.

[0148] First, an air compressor (not shown) that generates compressed air is operated, and the compressed air in a compressed air tank (not shown) is sent through the compressed air connection port 124. The compressed air is sent to the pulverization section 130 and ejected from the plurality of injection nozzles 132b provided in the jet ring 132 to generate a swirling air flow in the abacus ball-shaped cavity chamber 140.

[0149] Next, the material to be pulverized is introduced from the raw material input pipe 152 of the input / output unit 150 into the cavity chamber 140 of the pulverizing unit 130. The introduced material to be pulverized swirls within the cavity chamber 140 along the swirling flow formed within the cavity chamber 140 having an abacus ball shape. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 132c formed on the inner surface of the abacus ball-shaped cavity chamber 140 of the pulverizing unit 130 or by colliding with other materials to be pulverized.

[0150] Since the diamond electrodeposited layer 132c is formed on the inner surface of the abacus ball-shaped cavity chamber 140 where the material to be pulverized collides, even if the material to be pulverized collides, the diamond electrodeposited layer 132c will not be scraped off and mixed into the fine powder of the product.

[0151] The pulverized fine powder swirls at high speed within the abacus ball-shaped cavity chamber 140 along the swirling flow and rises within the cavity chamber 140. The swirling and rising fine powder passes through the opening 133a at the center of the partition plate 133 and is discharged to the outside from the fine powder discharge port 154, and is recovered as the fine powder as a product.

[0152] In this embodiment, since the cavity chamber 140 has an abacus ball shape, the following effects are obtained. First, since the cavity chamber 140 has an abacus ball shape, the swirling flow can be accelerated by reducing the cavity volume compared to a cylindrical shape. Also, since the cavity chamber 140 has an abacus ball shape, the angle of high-speed injection from the jet nozzle and the wall surface angle can be made the same, and the swirling flow can be accelerated. Furthermore, since the cavity chamber 140 has an abacus ball shape, along with the acceleration of the swirling flow, the collision distance to the wall surface becomes shorter, the collision energy is amplified, and finer pulverization becomes possible.

[0153] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0154] [Fifth Embodiment] The jet mill device according to the fifth embodiment of the present invention will be described with reference to FIG. 15.

[0155] In the jet mill device 110 of the present embodiment, unlike the jet mill device 110 according to the fourth embodiment of the present invention, a diamond electrodeposited layer 132c is not formed on the inner surface of the cavity chamber 140 where the material to be pulverized collides. Other configurations are the same as those of the jet mill device 110 according to the fourth embodiment of the present invention.

[0156] In the jet mill device 110 of the present embodiment, the inner surface of the cavity chamber 140 is formed of a material having a higher hardness than the material to be pulverized.

[0157] Alternatively, in the jet mill device 110 of the present embodiment, it is used only for the pulverization treatment of the material to be pulverized having a hardness lower than the hardness of the material on the inner surface of the cavity chamber 140.

[0158] [Sixth Embodiment] The jet mill device according to the sixth embodiment of the present invention will be described with reference to FIGS. 16 and 17. FIG. 16 is a longitudinal sectional view of the jet mill device 110 of the present embodiment.

[0159] (Configuration of Jet Mill Device) The jet mill device 110 of the present embodiment includes a base portion 120, a cylindrical pulverizing portion 130 provided on the base portion 120 for pulverizing the material to be pulverized into fine powder, and an input / output portion 150 provided on the pulverizing portion 130 for inputting the material to be pulverized into the pulverizing portion 130 and outputting the pulverized fine powder from the pulverizing portion 130.

[0160] In the pulverizing portion 130, cavity chambers 141, 142, and 143 for performing the pulverization treatment of the material to be pulverized are provided. The input / output portion 150 inputs the material to be pulverized into the cavity chamber 141 of the pulverizing portion 130 and takes out the pulverized fine powder from the cavity chamber 143 of the pulverizing portion 130.

[0161] (Base Portion) In the base portion 120 of the jet mill device according to this embodiment, a compressed air tank (not shown) for sending compressed air into the cavity chamber 140 of the pulverizing portion 130 is provided. A compressed air connection port 124 is formed in the compressed air tank (not shown). A compressor (not shown) for generating compressed air is connected to the compressed air connection port 124.

[0162] The compressed air generated by the compressor (not shown) is sent from the compressed air connection port 124 to the pulverizing portion 130.

[0163] (Pulverizing portion (air flow generation portion)) The pulverizing portion 130 of the jet mill device according to this embodiment includes an underplate 131 provided at the bottom of the cavity chamber 141, a jet ring 132 provided on the underplate 131, a partition plate 133 provided on the jet ring 132, a jet ring 134 provided on the partition plate 133, a partition plate 135 provided on the jet ring 134, a jet ring 136 provided on the partition plate 135, and a partition plate 137 provided on the jet ring 136.

[0164] The jet rings 132, 134, and 136 have the same configuration as the jet ring 44 of the first embodiment shown in FIG. 7. A plurality of injection nozzles 132b, 134b, and 136b are provided on the donut-shaped jet ring bodies 132a, 134a, and 136a of the jet rings 132, 134, and 136, respectively. For example, in FIG. 7(a), 12 injection nozzles 132b, 134b, and 136b are provided at intervals of about 30 degrees. The plurality of injection nozzles 132b, 134b, and 136b generate swirling air flows in the cavity chambers 141, 142, and 143.

[0165] The shapes and arrangements of the injection nozzles 132b, 134b, and 136b are the same as those of the injection nozzle 44b of the jet ring 44 of the first embodiment shown in FIG. 7.

[0166] The jet ring 132 is sandwiched between the underplate 131 and the partition plate 133 to form a cavity chamber 141 in the pulverizing section 130. The jet ring 134 is sandwiched between the partition plate 133 and the partition plate 135 to form a cavity chamber 142 in the pulverizing section 130. The jet ring 136 is sandwiched between the partition plate 135 and the partition plate 137 to form a cavity chamber 143 in the pulverizing section 130.

[0167] An opening 133a is formed in the center of the partition plate 133. The diameter of the opening 133a is R1. An opening 135a is formed in the center of the partition plate 135. The diameter of the opening 135a is R2. An opening 137a is formed in the center of the partition plate 137. The diameter of the opening 137a is R3. The diameter R2 is larger than the diameter R1, and the diameter R3 is larger than the diameter R2.

[0168] Through the opening 133a with a diameter of R1 in the partition plate 133, the fine powder in the cavity chamber 141 moves into the cavity chamber 142. Through the opening 135a with a diameter of R2 in the partition plate 135, the fine powder in the cavity chamber 142 moves into the cavity chamber 143. Through the opening 137a with a diameter of R3 in the partition plate 137, the fine powder in the cavity chamber 144 is output to the input / output section 150.

[0169] (Input / Output Section) As shown in FIG. 16, an input / output section 150 is provided on the pulverizing section 130 to input the material to be pulverized into the cavity chamber 140 of the pulverizing section 130 and output the pulverized fine powder from the cavity chamber 140 of the pulverizing section 130.

[0170] The input / output section 150 is provided with a raw material input pipe 152 for inputting the material to be pulverized into the cavity chamber 140 of the pulverizing section 130 and a fine powder discharge port 154 for discharging the pulverized fine powder. The raw material input pipe 152 penetrates through the openings 133a, 135a, and 137a at the centers of the partition plates 133, 135, and 137 of the pulverizing section 130, and its lower end reaches into the cavity chamber 141.

[0171] Although a mesh for allowing only fine powder having a particle size finer than a predetermined particle size to pass therethrough is not provided at the connection portion between the input / output unit 150 and the cavity chamber 140, the openings 133a, 135a, 137a with diameters R1, R2, R3 at the centers of the partition plates 133, 135, 137 perform that function.

[0172] When the pulverized fine powder in the cavity chambers 141, 142, 143 of the pulverizing unit 130 is rapidly swirled by the air flow swirling therein, Figure 17(b) As shown in, the particle size distribution of the fine powder in the cavity chambers 141, 142, 143 is a distribution where the center is fine and the periphery is coarse, that is, a distribution GS1, GS2, GS3 where the particle diameter of the fine powder at the center is small and the particle diameter of the fine powder at the periphery is large.

[0173] Since the fine powder in the cavity chamber 141 moves from the cavity chamber 141 to the cavity chamber 142 through the opening 133a with diameter R1 at the center of the partition plate 133, in the cavity chamber 142, based on the particle size distribution GS1 of the fine powder in the cavity chamber 141, only the fine powder with a fine particle size within the range of the opening 133a with diameter R1, that is, the fine powder with a small particle diameter, moves into the cavity chamber 142.

[0174] Since the fine powder in the cavity chamber 142 moves from the cavity chamber 142 to the cavity chamber 143 through the opening 135a with diameter R2 at the center of the partition plate 135, in the cavity chamber 143, based on the particle size distribution GS2 of the fine powder in the cavity chamber 142, only the fine powder with a fine particle size within the range of the opening 135a with diameter R2, that is, the fine powder with a small particle diameter, moves into the cavity chamber 143.

[0175] Since the fine powder in the cavity chamber 143 is output from the cavity chamber 143 to the input / output unit 150 through the opening 137a with diameter R3 at the center of the partition plate 137, in the input / output unit 150, based on the particle size distribution GS3 of the fine powder in the cavity chamber 143, only the fine powder with a fine particle size within the range of the opening 137a with diameter R3, that is, the fine powder with a small particle diameter, is discharged to the outside from the fine powder discharge port 54 and recovered as the fine powder as a product.

[0176] (Operation of the jet mill device) The operation of the jet mill device according to this embodiment will be described with reference to FIG. 17.

[0177] First, an air compressor (not shown) that generates compressed air is operated, and the compressed air is sent into a compressed air tank (not shown) through the compressed air connection port 124. The compressed air is sent to the pulverizing section 130 and ejected from a plurality of injection nozzles 132b, 134b, 136b provided in the jet rings 132, 134, 136 to generate swirling airflows in the cavity chambers 141, 142, 143.

[0178] Next, the material to be pulverized is introduced into the cavity chamber 141 of the pulverizing section 130 through the raw material input pipe 152 of the input / output section 150. The introduced material to be pulverized rides on the swirling flow formed in the cavity chamber 141 and swirls inside the cavity chamber 141. The swirling material to be pulverized collides with the diamond electrodeposited layer 132c formed on the inner surface of the cavity chamber 141 of the pulverizing section 130 or collides with other materials to be pulverized, and is pulverized into fine powder.

[0179] Subsequently, the fine powder that has moved into the cavity chamber 142 rides on the swirling flow formed in the cavity chamber 142 and swirls inside the cavity chamber 142. The swirling material to be pulverized collides with the diamond electrodeposited layer 134c formed on the inner surface of the cavity chamber 142 of the pulverizing section 130 or collides with other materials to be pulverized, and is pulverized into fine powder.

[0180] Subsequently, the fine powder that has moved into the cavity chamber 143 rides on the swirling flow formed in the cavity chamber 143 and swirls inside the cavity chamber 143. The swirling material to be pulverized collides with the diamond electrodeposited layer 136c formed on the inner surface of the cavity chamber 143 of the pulverizing section 130 or collides with other materials to be pulverized, and is pulverized into fine powder.

[0181] Since the diamond electrodeposited layers 132c, 134c, 136c are formed on the inner surfaces of the cavity chambers 141, 142, 143 where the material to be pulverized collides, even if the material to be pulverized collides, the diamond electrodeposited layers 132c, 134c, 136c will not be worn away and mixed into the fine pulverization of the product.

[0182] Finally, the pulverized fine powder swirls rapidly along with the swirling flow in the cavity chamber 143 and rises within the cavity chamber 143. The swirling and rising fine powder passes through the opening 137a at the center of the partition plate 137 and is discharged to the outside from the fine powder discharge port 154, and is recovered as the fine powder as a product.

[0183] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0184] In addition, the shapes of the cavity chambers 141, 142, and 143 in the jet mill device according to the sixth embodiment of the present invention may be a so-called abacus ball shape in which the center is thick and the periphery is thin as shown in FIG. 14, like the cavity chamber 140 in the jet mill device according to the fourth embodiment of the present invention.

[0185] [Seventh Embodiment] The jet mill device according to the seventh embodiment of the present invention will be described with reference to FIG. 18.

[0186] In the jet mill device 110 of the present embodiment, different from the jet mill device 110 according to the sixth embodiment of the present invention, diamond electrodeposited layers 132c, 134c, and 136c are not formed on the inner surfaces of the cavity chambers 141, 142, and 143 where the material to be pulverized collides. Other configurations are the same as those of the jet mill device 110 according to Sixth Embodiment the present invention.

[0187] In the jet mill device 110 of the present embodiment, the inner surfaces of the cavity chambers 141, 142, and 143 are formed of a material having a higher hardness than the material to be pulverized.

[0188] Alternatively, in the jet mill device 110 of the present embodiment, it is only used for the pulverization treatment of the material to be pulverized having a hardness lower than the hardness of the material on the inner surfaces of the cavity chambers 141, 142, and 143.

[0189] In addition, the shapes of the cavity chambers 141, 142, and 143 in the jet mill device according to the seventh embodiment of the present invention may be a so-called abacus ball shape in which the center is thick and the periphery is thin, as shown in FIG. 14, like the cavity chamber 140 in the jet mill device according to the fourth embodiment of the present invention.

[0190] [Eighth Embodiment] The jet mill device according to the eighth embodiment of the present invention will be described with reference to FIGS. 19 to 25. FIG. 19 is a longitudinal sectional view of the jet mill device 210 of the present embodiment.

[0191] (Configuration of Jet Mill Device) The jet mill device 210 of the present embodiment includes a base portion 220, a cylindrical pulverizing portion 230 provided on the base portion 220 for pulverizing an object to be pulverized into fine powder, and an input / output portion 250 provided on the pulverizing portion 230 for inputting the object to be pulverized into the pulverizing portion 230 and outputting the pulverized fine powder from the pulverizing portion 230.

[0192] A plurality of cavity chambers 245, 246, 247, and 248 in which the pulverization process of the object to be pulverized is performed are provided in the pulverizing portion 230. The input / output portion 250 inputs the object to be pulverized into the lowermost cavity chamber 245 of the pulverizing portion 230 and takes out the pulverized fine powder from the uppermost cavity chamber 248 of the pulverizing portion 230.

[0193] (Base Portion) A compressed air tank (not shown) for sending compressed air into the cavity chambers 245, 246, 247, and 248 of the pulverizing portion 230 is provided in the base portion 220 of the jet mill device 210 according to the present embodiment. A compressed air connection port 224 is formed in the compressed air tank (not shown). A compressor (not shown) for generating compressed air is connected to the compressed air connection port 224.

[0194] The compressed air generated by the compressor (not shown) is sent from the compressed air connection port 224 to the pulverizing portion 230.

[0195] (Pulverizing Portion: Basic Structure (Air Flow Generation Portion)) At the bottom of the pulverizing section 230 of the jet mill device 210 according to the present embodiment, an underplate 231 is provided.

[0196] On the underplate 231, a first jet ring 232 for forming the first-stage cavity chamber 245 is provided. A diamond electrodeposited layer 245d is formed on the inner wall of the cavity chamber 245.

[0197] On the first jet ring 232, a first partition plate 233 is provided. On the first partition plate 233, a second partition plate 234 is provided. On the second partition plate 234, a second jet ring 235 for forming the second-stage cavity chamber 246 is provided. A diamond electrodeposited layer 246d is formed on the inner wall of the cavity chamber 246.

[0198] On the second jet ring 235, a first partition plate 236 is provided. On the first partition plate 236, a second partition plate 237 is provided. On the second partition plate 237, a second jet ring 238 for forming the third-stage cavity chamber 247 is provided. A diamond electrodeposited layer 247d is formed on the inner wall of the cavity chamber 247.

[0199] On the second jet ring 238, a first partition plate 239 is provided. On the first partition plate 239, a second partition plate 240 is provided. On the second partition plate 240, a second jet ring 241 for forming the fourth-stage cavity chamber 248 is provided. A diamond electrodeposited layer 248d is formed on the inner wall of the cavity chamber 248.

[0200] At the top of the pulverizing section 230 on the second jet ring 241, a top plate 242 is provided.

[0201] (Pulverizing section: Jet ring) Figure 20 shows the first jet ring 232 and the second jet rings 235, 238, 241 of the jet mill device 210 according to the present embodiment. In the present embodiment, the structure of the first jet ring 232 for forming the first-stage cavity chamber 245 of the pulverizing section 230 is different from that of the second jet rings 235, 238, 241 for forming the second-stage to fourth-stage cavity chambers 246, 247, 248 of the pulverizing section 230.

[0202] The first jet ring 232 is shown in Fig. 20(a). In the first jet ring 232, a plurality of injection nozzles 232b for injecting air are provided in a donut-shaped jet ring body 232a. The outer periphery of the jet ring body 232a is circular, and the inner periphery is hexagonal. A plurality of through holes 232d for lamination are formed in the outer peripheral portion of the jet ring body 232a. The first-stage cavity chamber 245 is defined by the hexagonal opening 232e of the jet ring body 232a.

[0203] Injection nozzles 232b are provided on each side of the hexagonal opening 232e of the jet ring body 232a. An injection port 232c for injecting air is formed at the tip of the injection nozzle 232b. The injection nozzle 232b is attached in such a direction that the air injected from the injection port 232c does not intersect with each other and hits approximately the center of the adjacent sides of the hexagonal opening 232e. That is, the position of the injection port 232c of the injection nozzle 232b is offset from the center of each side of the hexagonal opening 232e, and the air injection direction is directed to a position offset from the center of the adjacent sides of the hexagonal opening 232e. A large swirling air flow is generated in the cavity chamber 245 defined by the hexagonal opening 232e of the jet ring body 232a by the plurality of injection nozzles 232b provided in this way. As shown in Fig. 20(a), a large swirling flow that swirls to the left is generated in the cavity chamber 245 defined by the hexagonal opening 232e.

[0204] The second jet ring 235 (238, 241) is shown in Fig. 20(b). In the second jet ring 235, a plurality of injection nozzles 235b for injecting air are provided in a donut-shaped jet ring body 235a. The outer circumference of the jet ring body 235a is circular, and the inner circumference is triangular. A plurality of through holes 235d for lamination are formed in the outer peripheral portion of the jet ring body 235a. The triangular openings 235e of the jet ring body 235a define the second-stage, third-stage, and fourth-stage cavity chambers 246, 247, and 248.

[0205] Injection nozzles 235b are provided on each side of the triangular opening 235e of the jet ring body 235a. An injection port 235c for injecting air is formed at the tip of the injection nozzle 235b. The injection nozzle 235b is attached in such a direction that the air injected from the injection port 235c does not intersect with each other and hits almost the center of the adjacent side of the triangular opening 235e. That is, the position of the injection port 235c of the injection nozzle 235b is offset from the center of each side of the triangular opening 235e, and the air injection direction is directed to a position offset from the center of the adjacent side of the triangular opening 235e. The plurality of injection nozzles 235b provided in this way generate a swirling air flow in the cavity chambers 246, 247, and 248. As shown in Fig. 20(b), a large swirling flow that swirls to the left is generated in the cavity chambers 246, 247, and 248 defined by the triangular opening 235e.

[0206] The opening 232e of the first jet ring 232 is preferably a polygon with six or more sides, giving priority to the function of efficiently sucking the material to be pulverized.

[0207] The opening 235e of the second jet ring 235 (238, 240) is preferably a polygon with less than six sides, giving priority to the function of causing the material to be pulverized to hit the wall surface.

[0208] (Pulverizing section: Partition plate) Figures 21 and 22 show the first partition plate 233 (236, 239) and the second partition plate 234 (237, 240) of the present embodiment. Fig. 21(a) is a plan view of the first partition plate 233 (236, 239), and Fig. 21(b) is a cross-sectional view of the first partition plate 233 (236, 239). Fig. 22(a) is a plan view of the second partition plate 234 (237, 240), and Fig. 22(b) is a cross-sectional view of the second partition plate 234 (237, 240).

[0209] The first partition plate 233 and the second partition plate 234 guide the fine particles swirling in the first-stage cavity chamber 245 to the second-stage cavity chamber 246. The first partition plate 236 and the second partition plate 237 guide the fine particles swirling in the second-stage cavity chamber 246 to the third-stage cavity chamber 247. The first partition plate 239 and the second partition plate 240 guide the fine particles swirling in the third-stage cavity chamber 247 to the fourth-stage cavity chamber 248.

[0210] The outer periphery of the partition plate body 233a of the first partition plate 233 (236, 239) is circular, and a plurality of through holes 233d for lamination are formed in the outer peripheral portion of the partition plate body 233a. A through hole 233c is formed at the center of the partition plate body 233a. Three guiding grooves 233e extending outward from the central through hole 233c are formed in the partition plate body 233a.

[0211] The outer periphery of the partition plate body 234a of the second partition plate 234 (237, 241) is circular, and a plurality of through holes 234d for lamination are formed in the outer peripheral portion of the partition plate body 234a. A through hole 234c is formed at the center of the partition plate body 234a. Three supply ports 234e are formed at positions outside from the central through hole 233c in the partition plate body 234a. The positions of the three supply ports 234e of the second partition plate 234 coincide with the positions of the ends of the three guiding grooves 233e of the first partition plate 233, respectively.

[0212] By laminating the first partition plate 233 and the second partition plate 234, a guiding path for fine particles that is continuous from the guiding groove 233e to the supply port 234e is formed.

[0213] (Crushing section: swirling flow in the cavity chambers after the second stage) Regarding the swirling flow in the cavity chambers 246, 247, and 248 after the second stage of the crushing section 230 in the jet mill device 210 according to the present embodiment, it will be described with reference to FIG. 23.

[0214] FIG. 23 is a diagram in which the second jet ring 235 that forms the cavity chamber 246 of the second stage and the second partition plate 234 that supplies fine particles to the cavity chamber 246 of the second stage are superimposed.

[0215] As shown in FIG. 23, the three supply ports 234e of the second partition plate 234 are located near the respective vertices of the triangular opening 235e of the second jet ring 235. The second jet ring 235 has three injection nozzles 235b provided on each side of the triangular opening 235e. The second jet ring 235 has the injection nozzles 235b provided such that their air injection directions face the adjacent sides of the triangular opening 235e and pass through the inside of the triangular opening 235e from the supply port 234e of the second partition plate 234.

[0216] The second jet ring 235 has injection nozzles 235b provided on each side of the triangular opening 235e, so a high-speed swirling flow is generated in the triangular cavity chamber 246.

[0217] Since the positions of the injection ports 235c of the injection nozzles 235b are offset from the centers of the respective sides of the triangular opening 235e and the air injection directions are directed to positions offset from the centers of the adjacent sides of the triangular opening 235e, the fine particles swirling due to the swirling flow continuously collide with the wall surface of the cavity chamber 246.

[0218] Since the three supply ports 234e of the second partition plate 234 are located near the respective vertices of the triangular opening 235e of the second jet ring 235, the fine particles from the first-stage cavity chamber 245 in the lower stage are not directly supplied to the center of the second-stage cavity chamber 246.

[0219] Thus, there are the following advantages. First, by supplying to the corners of the triangle from the first stage to the second stage, the supply flow rate can be reduced to 1 / 3. Also, due to the three jet nozzles within the triangle of the second stage, a large and powerful main swirling flow is generated in contact with each side, and since it is surrounded by two sides of the triangle, a counter-rotating swirling flow is generated near the opening 235e, enabling more efficient wall impingement and also promoting particle-particle collisions.

[0220] Due to the high-speed and large swirling flow in the triangular cavity chamber 246, small swirling flows are generated near the three supply ports 234e of the second partition plate 234.

[0221] Due to the small swirling flows near the three supply ports 234e of the second partition plate 234, the fine particles continuously collide with the wall surface of the cavity chamber 246, and due to the large swirling flow in the center of the cavity chamber 246, the fine particles continuously collide with the wall surface of the cavity chamber 246.

[0222] Similarly, in the third-stage and fourth-stage cavity chambers 247 and 248 after the second stage, a large swirling flow in the center and three small swirling flows are generated, causing the fine particles to collide with the wall surfaces of the cavity chambers 247 and 248, thereby further refining the fine particles.

[0223] (Grinding section: Swirling flow in the first-stage cavity chamber and swirling flows in the cavity chambers after the second stage) The swirling flow in the first-stage cavity chamber 245 and the swirling flows in the cavity chambers 246, 247, and 248 of the grinding section 230 in the jet mill device 210 according to the present embodiment will be described with reference to FIG. 24.

[0224] FIG. 24 is a diagram showing a superposition of a first jet ring 232 that forms a first-stage cavity chamber 245, a first partition plate 233 provided on the first jet ring 232, a second partition plate 234 provided on the first partition plate 233, and a second jet ring 235 that forms a second-stage cavity chamber 246.

[0225] Each vertex of the triangular opening 235e of the second jet ring 235 is located at the center of three sides of the hexagonal opening 232e of the first jet ring 232.

[0226] The three guiding grooves 233e of the first partition plate 233 are formed in regions extending from the center of the triangular opening 235e of the second jet ring 235 toward the three vertices.

[0227] The three supply ports 234e of the second partition plate 234 are located near each vertex of the triangular opening 235e of the second jet ring 235 and near the three sides within the hexagonal opening 232e of the first jet ring 232.

[0228] As a result, a swirling flow as shown in FIG. 24 is generated in the first-stage cavity chamber 245 defined by the opening 232e of the first jet ring 232 and the second-stage cavity chamber 246 defined by the opening 235e of the second jet ring 235.

[0229] In the first-stage cavity chamber 245 formed by the opening 232e of the first jet ring 232, a large swirling flow along the outer edge of the hexagonal opening 232e is generated by injection nozzles 232b provided on each side of the hexagonal opening 232e.

[0230] In the second-stage cavity chamber 246 formed by the opening 235e of the second jet ring 235, as also shown in FIG. 23, a large swirling flow in the triangular cavity chamber 246 and a small swirling flow near the three supply ports 234e of the second partition plate 234 are generated.

[0231] The swirling flow in the second-stage cavity chamber 246 has a smaller swirling flow diameter than the swirling flow in the first-stage cavity chamber 245, so it is more suitable for higher speeds and finer particle sizes.

[0232] (Basic Principle of Jet Mill Grinding) The basic principle of jet mill grinding will be described with reference to Fig. 25.

[0233] The basic principle of jet mill grinding is to refine particles by the collision of particles. However, it has been found that when the refined particles become smaller than a predetermined particle size, the grinding efficiency decreases sharply only by the collision of particles, and ultimately further refinement becomes impossible.

[0234] As shown in Fig. 25, this is presumably because the particles float in the cavity chamber along with the swirling flow, so even if the particles collide with each other, the collision energy escapes in the same direction as the swirling flow, and the particles cannot be ground.

[0235] Therefore, in the present invention, the particles are actively made to collide with the inner wall surface of the cavity chamber, and the particles are ground by this collision. As a result, it has become possible to refine particles at the nano-size level, which was impossible in the past.

[0236] (Input / Output Section) As shown in Fig. 19, on the grinding section 230, there is provided an input / output section 250 for inputting the material to be ground into the first-stage cavity chamber 245 of the grinding section 230 and outputting the ground fine powder from the fourth-stage cavity chamber 248 of the grinding section 230.

[0237] The input / output unit 250 is provided with a raw material input pipe 252 for introducing the material to be pulverized into the first-stage cavity chamber 245 of the pulverizing unit 230, and a fine powder discharge port 254 for discharging the fine powder pulverized from the fourth-stage cavity chamber 248. The raw material input pipe 252 penetrates through the through holes 233c, 234c, 236c, 237c, 239c, and 240c at the centers of the first partition plate 233, the second partition plate 234, the first partition plate 236, the second partition plate 237, the first partition plate 239, and the second partition plate 240 of the pulverizing unit 230, and its lower end reaches into the first-stage cavity chamber 245. Thereby, the raw material is supplied to the pulverizing unit 230.

[0238] (Operation of the jet mill device) The operation of the jet mill device according to this embodiment will be described with reference to FIG. 19.

[0239] First, an air compressor (not shown) that generates compressed air is operated, and the compressed air of a compressed air tank (not shown) is sent in through the compressed air connection port 224. The compressed air is sent to the pulverizing unit 230 and ejected from a plurality of injection nozzles 232b, 235b, 238b, and 241b provided in the first jet ring 232, the second jet rings 235, 238, and 241 to generate swirling airflows in the cavity chambers 245, 246, 247, and 248.

[0240] Next, the material to be pulverized is introduced into the first-stage cavity chamber 245 of the pulverizing unit 230 from the raw material input pipe 252 of the input / output unit 250.

[0241] The introduced material to be pulverized rides on the swirling flow formed in the cavity chamber 245 and swirls inside the cavity chamber 245. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 245d formed on the inner surface of the cavity chamber 245 of the pulverizing unit 230 or by colliding with other materials to be pulverized.

[0242] When the pulverized fine powder in the first-stage cavity chamber 245 is rapidly rotated by the swirling air flow as indicated by the arrow, the particle size distribution of the fine powder in the cavity chamber 245 becomes a distribution with a fine center and a coarse periphery, that is, a distribution in which the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0243] The fine powder in the first-stage cavity chamber 245 is guided by the grooves and openings formed in the first partition plate 233 and the second partition plate 234 as indicated by the arrow and is supplied to the second-stage cavity chamber 246.

[0244] Subsequently, the fine powder supplied to the second-stage cavity chamber 246 swirls inside the cavity chamber 246 along the swirling flow formed inside the cavity chamber 246. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 246d formed on the inner surface of the cavity chamber 246 of the pulverizing section 230 or by colliding with each other among the materials to be pulverized.

[0245] When the pulverized fine powder in the second-stage cavity chamber 246 is rapidly rotated by the swirling air flow as indicated by the arrow, the particle size distribution of the fine powder in the cavity chamber 246 becomes a distribution with a fine center and a coarse periphery, that is, a distribution in which the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0246] The fine powder in the second-stage cavity chamber 246 is guided by the grooves and openings formed in the first partition plate 236 and the second partition plate 237 as indicated by the arrow and is supplied to the third-stage cavity chamber 247.

[0247] Subsequently, the fine powder supplied to the third-stage cavity chamber 247 swirls inside the cavity chamber 247 along the swirling flow formed inside the cavity chamber 247. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 247d formed on the inner surface of the cavity chamber 247 of the pulverizing section 230 or by colliding with each other among the materials to be pulverized.

[0248] When the pulverized fine powder in the third-stage cavity chamber 247 is rapidly rotated by the swirling air flow as indicated by the arrow, the particle size distribution of the fine powder in the cavity chamber 247 becomes a distribution where the center is fine and the periphery is coarse, that is, a distribution where the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0249] The fine powder in the third-stage cavity chamber 247 is guided by the grooves and openings formed in the first partition plate 239 and the second partition plate 240 as indicated by the arrow and supplied to the fourth-stage cavity chamber 248.

[0250] Subsequently, the fine powder supplied to the fourth-stage cavity chamber 248 swirls inside the cavity chamber 248 along the swirling flow formed inside the cavity chamber 248. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 248d formed on the inner surface of the cavity chamber 248 of the pulverizing section 230 or by colliding with each other.

[0251] When the pulverized fine powder in the fourth-stage cavity chamber 248 is rapidly rotated by the swirling air flow as indicated by the arrow, the particle size distribution of the fine powder in the cavity chamber 248 becomes a distribution where the center is fine and the periphery is coarse, that is, a distribution where the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0252] The fine powder in the fourth-stage cavity chamber 248 is output to the input / output section 250 from the opening at the center of the top plate 242 as indicated by the arrow. Only the fine powder with a small particle diameter is discharged to the outside from the fine powder discharge port 254 and recovered as the fine powder as a product.

[0253] Since the diamond electrodeposited layers 245d, 246d, 247d, 248d are formed on the inner surfaces of the cavity chambers 245, 246, 247, 248 where the material to be pulverized collides, even if the material to be pulverized collides, the diamond electrodeposited layers 245d, 246d, 247d, 248d will not be worn away and mixed into the fine pulverization of the product.

[0254] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0255] [Embodiment 9] The jet mill device according to the ninth embodiment of the present invention will be described with reference to FIGS. 26 to 33. FIG. 26 is a longitudinal sectional view of the jet mill device 310 of the present embodiment.

[0256] (Configuration of Jet Mill Device) The jet mill device 310 of the present embodiment includes a base portion 320, a cylindrical pulverizing portion 330 provided on the base portion 320 for pulverizing an object to be pulverized into fine powder, and an input / output portion 350 provided on the pulverizing portion 330 for inputting the object to be pulverized into the pulverizing portion 330 and outputting the pulverized fine powder from the pulverizing portion 330.

[0257] Inside the pulverizing portion 330, a plurality of cavity chambers 345, 346, 347, 348 where the pulverization process of the object to be pulverized is performed are provided. The input / output portion 350 inputs the object to be pulverized into the lowermost cavity chamber 345 of the pulverizing portion 330 and takes out the pulverized fine powder from the uppermost cavity chamber 348 of the pulverizing portion 330.

[0258] (Base Portion) The base portion 320 of the jet mill device 310 according to the present embodiment is provided with a compressed air tank (not shown) for sending compressed air into the cavity chambers 345, 346, 347, 348 of the pulverizing portion 330. A compressed air connection port 324 is formed in the compressed air tank (not shown). A compressor (not shown) for generating compressed air is connected to the compressed air connection port 324.

[0259] The compressed air generated by the compressor (not shown) is sent from the compressed air connection port 324 to the pulverizing portion 330.

[0260] (Pulverizing Portion: Basic Structure (Air Flow Generation Portion)) An underplate 331 is provided at the bottom of the pulverizing portion 330 of the jet mill device 310 according to the present embodiment.

[0261] On the underplate 331, a first jet ring 332 for forming the first-stage cavity chamber 345 is provided. A diamond electrodeposited layer 345d is formed on the inner wall of the cavity chamber 345.

[0262] A first partition plate 333 is provided on the first jet ring 332, a second partition plate 334 is provided on the first partition plate 333, and a second jet ring 335 for forming the second-stage cavity chamber 346 is provided on the second partition plate 334. A diamond electrodeposited layer 346d is formed on the inner wall of the cavity chamber 346.

[0263] A third partition plate 336 is provided on the second jet ring 335, a fourth partition plate 337 is provided on the third partition plate 336, and a second jet ring 338 for forming the third-stage cavity chamber 347 is provided on the fourth partition plate 337. A diamond electrodeposited layer 347d is formed on the inner wall of the cavity chamber 347.

[0264] A third partition plate 339 is provided on the second jet ring 338, a fourth partition plate 340 is provided on the third partition plate 339, and a second jet ring 341 for forming the fourth-stage cavity chamber 348 is provided on the fourth partition plate 340. A diamond electrodeposited layer 348d is formed on the inner wall of the cavity chamber 348.

[0265] A top plate 342 is provided at the top of the pulverizing section 330 on the second jet ring 341.

[0266] (Pulverizing section: Jet ring) Fig. 27 shows the first jet ring 332 and the second jet rings 335, 338, 341 of the jet mill device 310 according to the present embodiment. In the present embodiment, the structure of the first jet ring 332 for forming the first-stage cavity chamber 345 of the pulverizing section 330 is different from that of the second jet rings 335, 338, 341 for forming the second-stage to fourth-stage cavity chambers 346, 347, 348 of the pulverizing section 330.

[0267] The first jet ring 332 is shown in Fig. 27(a). In the first jet ring 332, a plurality of injection nozzles 332b for injecting air are provided in a donut-shaped jet ring body 332a. The outer periphery of the jet ring body 332a is circular, and the inner periphery is hexagonal. A plurality of through holes 332d for lamination are formed in the outer peripheral portion of the jet ring body 332a. The hexagonal opening 332e of the jet ring body 332a defines the first-stage cavity chamber 345.

[0268] Injection nozzles 332b are provided on each side of the hexagonal opening 332e of the jet ring body 332a. An injection port 332c for injecting air is formed at the tip of the injection nozzle 332b. The injection nozzle 332b is attached in such a direction that the air injected from its injection port 332c does not intersect with each other and hits approximately the center of the adjacent sides of the hexagonal opening 332e. That is, the position of the injection port 332c of the injection nozzle 332b is offset from the center of each side of the hexagonal opening 332e, and the air injection direction is directed to a position offset from the center of the adjacent sides of the hexagonal opening 332e. The plurality of injection nozzles 332b provided in this way generate a large swirling air flow in the cavity chamber 345. As shown in Fig. 27(a), a large swirling flow that swirls leftward is generated in the cavity chamber 345 defined by the hexagonal opening 332e.

[0269] The second jet ring 335 (338, 341) is shown in Fig. 27(b). In the second jet ring 335, a plurality of injection nozzles 335b for injecting air are provided in a donut-shaped jet ring body 335a. The outer periphery of the jet ring body 335a is circular, and six triangular openings 335e are formed inside. A plurality of through holes 335d for lamination are formed in the outer peripheral portion of the jet ring body 335a. The six triangular openings 335e of the jet ring body 335a define six second-stage, third-stage, and fourth-stage cavity chambers 346, 347, and 348.

[0270] Six injection nozzles 335b are respectively provided in six triangular openings 335e of the jet ring body 335a. An injection port 335c for injecting air is formed at the tip of the injection nozzle 335b. The injection nozzle 335b is provided on the outer peripheral side of the triangular opening 335e and is attached so that the air injection direction hits the adjacent side of the triangular opening 335e. The injection nozzle 335b thus provided generates a swirling air flow in the cavity chambers 346, 347, 348 defined by the triangular opening 335e. As shown in FIG. 27(b), a large counterclockwise swirling flow is generated at the center of the triangular cavity chambers 346, 347, 348 defined by the triangular opening 335e, and small clockwise swirling flows are generated at the three corners of the triangular cavity chambers 346, 347, 348.

[0271] The opening 332e of the first jet ring 332 is preferably a polygon with six or more sides, giving priority to the function of efficiently sucking the material to be pulverized.

[0272] The opening 335e of the second jet ring 335 (338, 341) is preferably a polygon with less than six sides, giving priority to the function of making the material to be pulverized hit the wall surface.

[0273] (Pulverizing section: partition plate, top plate) FIGS. 28 to 32 show the first partition plate 333, the second partition plate 334, the third partition plates 336, 339, the fourth partition plates 337, 340, and the top plate 342 of the present embodiment.

[0274] Fig. 28(a) is a plan view of the first partition plate 333, and Fig. 28(b) is a cross-sectional view of the first partition plate 333. Fig. 29(a) is a plan view of the second partition plate 334, and Fig. 29(b) is a cross-sectional view of the second partition plate 334. Fig. 30(a) is a plan view of the third partition plates 336 and 339, and Fig. 30(b) is a cross-sectional view of the third partition plates 336 and 339. Fig. 31(a) is a plan view of the fourth partition plates 337 and 340, and Fig. 31(b) is a cross-sectional view of the fourth partition plates 337 and 340. Fig. 32(a) is a plan view of the top plate 342, and Fig. 32(b) is a cross-sectional view of the top plate 342.

[0275] The first partition plate 333 and the second partition plate 334 guide the fine particles swirling in the first-stage cavity chamber 345 to the second-stage cavity chamber 346. The third partition plate 336 and the fourth partition plate 337 guide the fine particles swirling in the second-stage cavity chamber 346 to the third-stage cavity chamber 347. The third partition plate 339 and the fourth partition plate 340 guide the fine particles swirling in the third-stage cavity chamber 347 to the fourth-stage cavity chamber 348. The top plate 342 guides the fine particles swirling in the fourth-stage cavity chamber 348 to the input / output section 350.

[0276] The outer periphery of the partition plate main body 333a of the first partition plate 333 is circular, and a plurality of through holes 333d for lamination are formed in the outer peripheral portion of the partition plate main body 333a. A through hole 333c is formed at the center of the partition plate main body 333a. Six guiding grooves 333e extending outward from the central through hole 333c are formed in the partition plate main body 333a.

[0277] The outer periphery of the partition plate body 334a of the second partition plate 334 is circular, and a plurality of through holes 334d for lamination are formed in the outer peripheral portion of the partition plate body 334a. A through hole 334c is formed in the center of the partition plate body 334a. Six supply ports 334e are formed in the partition plate body 334a at positions outward from the central through hole 334c. The positions of the six supply ports 334e of the second partition plate 334 respectively coincide with the positions of the ends of the six guiding grooves 333e of the first partition plate 333.

[0278] By laminating the first partition plate 333 and the second partition plate 334, a guiding path for fine particles that is continuous from the guiding groove 333e to the supply port 334e is formed.

[0279] The outer periphery of the partition plate body 336a of the third partition plate 336 (339) is circular, and a plurality of through holes 336d for lamination are formed in the outer peripheral portion of the partition plate body 336a. A through hole 336c is formed in the center of the partition plate body 336a. Six guiding grooves 336e are formed in the partition plate body 336a at positions outward from the central through hole 336c.

[0280] The outer periphery of the partition plate body 337a of the fourth partition plate 337 (340) is circular, and a plurality of through holes 337d for lamination are formed in the outer peripheral portion of the partition plate body 337a. A through hole 337c is formed in the center of the partition plate body 337a. Six supply ports 334e are formed in the partition plate body 337a at positions outward from the central through hole 337c. The positions of the six supply ports 337e of the fourth partition plate 337 respectively coincide with the positions of the ends of the six guiding grooves 336e of the third partition plate 336.

[0281] By laminating the third partition plate 336 and the fourth partition plate 337, a guiding path for fine particles that is continuous from the guiding groove 336e to the supply port 337e is formed.

[0282] The outer periphery of the top plate body 342a of the top plate 342 is circular, and a plurality of through holes 342d for lamination are formed in the outer peripheral portion of the top plate body 342a. A through hole 342c is formed at the center of the top plate body 342a. Six guide grooves 342e extending outward from the central through hole 342c are formed in the top plate body 342a. The positions of the ends of the six guide grooves 342e of the top plate 342 coincide with the positions of the six triangular openings 341e of the second jet ring 341.

[0283] (Grinding section: swirling flow in the first-stage cavity chamber and swirling flow in the cavity chambers from the second stage onward) Regarding the swirling flow in the first-stage cavity chamber 345 of the grinding section 330 and the swirling flows in the cavity chambers 346, 347, and 348 from the second stage onward in the jet mill device 310 according to the present embodiment, an explanation will be given with reference to FIG. 33.

[0284] FIG. 33 is a diagram in which the first jet ring 332 forming the first-stage cavity chamber 345, the first partition plate 333 provided on the first jet ring 332, the second partition plate 334 provided on the first partition plate 333, the second jet ring 335 forming the second-stage cavity chamber 346, the third partition plate 336 provided on the second jet ring 335, and the fourth partition plate 337 provided on the third partition plate 336 are superimposed.

[0285] The six triangular openings 335e of the second jet ring 335 are located near the six sides of the hexagonal opening 332e of the first jet ring 332.

[0286] The six guide grooves 333e of the first partition plate 333 are formed in regions leading to the vertices of the six triangular openings 335e of the second jet ring 335.

[0287] The six supply ports 334e of the second partition plate 334 are located at the ends of the six guide grooves 333e of the first partition plate 333.

[0288] As a result, a large swirling flow is generated in the first-stage cavity chamber 345 defined by the opening 332e of the first jet ring 332, and relatively small swirling flows are respectively generated in the six second-stage cavity chambers 346 defined by the openings 335e of the second jet ring 335.

[0289] The six guide grooves 336e of the third partition plate 336 are formed in the regions of the six triangular openings 335e of the second jet ring 335.

[0290] The six supply ports 337e of the fourth partition plate 337 are located at the ends of the six guide grooves 336e of the third partition plate 336.

[0291] As a result, relatively small high-speed swirling flows are respectively generated in the six third-stage cavity chambers 346 defined by the openings 338e of the second jet ring 338.

[0292] The six guide grooves 339e of the third partition plate 339 are formed in the regions of the six triangular openings 338e of the second jet ring 338.

[0293] The six supply ports 340e of the fourth partition plate 340 are located at the ends of the six guide grooves 339e of the third partition plate 339.

[0294] As a result, relatively small and even higher-speed swirling flows are respectively generated in the six fourth-stage cavity chambers 346 defined by the openings 341e of the second jet ring 341.

[0295] (Input / Output Section) As shown in FIG. 26, an input / output section 350 is provided on the pulverizing section 330 to input the material to be pulverized into the first-stage cavity chamber 345 of the pulverizing section 330 and output the pulverized fine powder from the fourth-stage cavity chamber 348 of the pulverizing section 330.

[0296] The input / output unit 350 is provided with a raw material input pipe 352 for introducing the material to be pulverized into the first cavity chamber 345 of the pulverizing unit 330, and a fine powder discharge port 354 for discharging the fine powder pulverized from the fourth cavity chamber 348. The raw material input pipe 352 penetrates through the through holes 333c, 334c, 336c, 337c, 339c, 340c at the centers of the first partition plate 333, the second partition plate 334, the third partition plate 336, the fourth partition plate 337, the third partition plate 339, and the fourth partition plate 340 of the pulverizing unit 330, and its lower end reaches into the first cavity chamber 345. Thereby, the raw material is supplied to the pulverizing unit 330.

[0297] (Operation of the jet mill device) The operation of the jet mill device according to this embodiment will be described with reference to FIG. 26.

[0298] First, an air compressor (not shown) that generates compressed air is operated, and the compressed air in a compressed air tank (not shown) is sent through the compressed air connection port 324. The compressed air is sent to the pulverizing unit 330, and is ejected from a plurality of injection nozzles 333b, 335b, 338b, 341b provided in the first jet ring 332, the second jet rings 335, 338, 341 to generate swirling air flows in the cavity chambers 345, 346, 347, 348.

[0299] Next, the material to be pulverized is introduced into the first cavity chamber 345 of the pulverizing unit 330 from the raw material input pipe 352 of the input / output unit 350.

[0300] The introduced material to be pulverized rides on the swirling flow formed in the cavity chamber 345 and swirls within the cavity chamber 345. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 345d formed on the inner surface of the cavity chamber 345 of the pulverizing unit 330 or by colliding with other materials to be pulverized.

[0301] When the pulverized fine powder in the cavity chamber 345 of the first stage is rapidly rotated by the swirling air flow, the particle size distribution of the fine powder in the cavity chamber 345 becomes a distribution with a fine center and a coarse periphery, that is, a distribution in which the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0302] The fine powder in the cavity chamber 345 of the first stage is guided by the grooves and openings formed in the first partition plate 333 and the second partition plate 334 and supplied to the cavity chamber 346 of the second stage.

[0303] Subsequently, the fine powder supplied to the cavity chamber 346 of the second stage swirls in the cavity chamber 346 along the swirling flow formed in the cavity chamber 346. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 346d formed on the inner surface of the cavity chamber 346 of the pulverizing section 330 or by colliding with the materials to be pulverized with each other.

[0304] When the pulverized fine powder in the cavity chamber 346 of the second stage is rapidly rotated by the swirling air flow, the particle size distribution of the fine powder in the cavity chamber 346 becomes a distribution with a fine center and a coarse periphery, that is, a distribution in which the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0305] The fine powder in the cavity chamber 346 of the second stage is guided by the grooves and openings formed in the third partition plate 336 and the fourth partition plate 337 as shown by the arrows and supplied to the cavity chamber 347 of the third stage.

[0306] Subsequently, the fine powder supplied to the cavity chamber 347 of the third stage swirls in the cavity chamber 347 along the swirling flow formed in the cavity chamber 347. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 347d formed on the inner surface of the cavity chamber 347 of the pulverizing section 330 or by colliding with the materials to be pulverized with each other.

[0307] When the pulverized fine powder in the cavity chamber 347 of the third stage is rapidly rotated by the swirling air flow, the particle size distribution of the fine powder in the cavity chamber 347 becomes a distribution with a fine center and a coarse periphery, that is, a distribution in which the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0308] The fine powder in the cavity chamber 347 of the third stage is guided by the grooves and openings formed in the third partition plate 339 and the fourth partition plate 340 and supplied to the cavity chamber 348 of the fourth stage.

[0309] Subsequently, the fine powder supplied to the cavity chamber 348 of the fourth stage swirls inside the cavity chamber 348 along the swirling flow formed inside the cavity chamber 348. The swirling material to be pulverized is pulverized into fine powder by colliding with the diamond electrodeposited layer 348d formed on the inner surface of the cavity chamber 348 of the pulverizing section 330 or by colliding with each other.

[0310] When the pulverized fine powder in the cavity chamber 348 of the fourth stage is rapidly rotated by the swirling air flow as shown by the arrow, the particle size distribution of the fine powder in the cavity chamber 348 becomes a distribution with a fine center and a coarse periphery, that is, a distribution in which the particle diameter of the fine powder in the center is small and the particle diameter of the fine powder in the periphery is large.

[0311] The fine powder in the cavity chamber 348 of the fourth stage is guided by the groove of the top plate 342 and output to the input / output section 350 from the central opening. Only the fine powder with a small particle diameter is discharged to the outside from the fine powder discharge port 354 and recovered as the fine powder as a product.

[0312] Since the diamond electrodeposited layers 345d, 346d, 347d, and 348d are formed on the inner surfaces of the cavity chambers 345, 346, 347, and 348 where the material to be pulverized collides, even if the material to be pulverized collides, the diamond electrodeposited layers 345d, 346d, 347d, and 348d will not be worn away and mixed into the fine pulverization of the product.

[0313] Thus, according to this embodiment, a jet mill device excellent in abrasion resistance by powder can be realized.

[0314] [Modification] The present invention is not limited to the above embodiments and can be variously modified.

[0315] For example, although the pulverizing section in this embodiment is cylindrical, it may have other shapes, such as spherical, hemispherical, conical, or spindle-shaped.

[0316] The number, installation position, installation angle of the injection nozzles, the number, installation position, installation angle of the protrusions, the number of layers of various laminates, etc. in this embodiment are not limited to the examples described in this embodiment.

Explanation of Reference Numerals

[0317] 10…Jet mill device 20…Base part 22…Compressed air tank 24…Compressed air connection port 26…Compressed air supply pipe 28…Drive motor for rotation 30…Pulverizing section 31…Hollow chamber 32…Flat plate-shaped rotor laminate 34…Flat plate-shaped rotor 34a…Through hole 34b…Central region 34c…Through hole 34d…Diamond electrodeposited layer 35a…Base metal (parent material) 35b…Plating layer 35b…Nickel plating layer 35c…CBN abrasive grains 36…Spacer ring 36a…Through hole 36c…Through hole 37…Flat plate-shaped rotor 37a…Through hole 37b…Flat surface part 37c…Notch 37d…Diamond electrodeposited layer 38…Flat plate-shaped rotor laminate 40…Fixed ring laminate 42…Underplate 42A... Underplate guiding ring 42a... Opening 42b... Diamond electroplated layer 42c... Region 42d... Screw hole 43... Under guiding ring 43a... Under guiding ring body 43b... Diamond electroplated layer 43c... Recess 43d... Through hole 44... Jet ring 44a... Jet ring body 44b... Injection nozzle 44c... Injection port 44d... Through hole 44e... Protrusion 45... Jet ring 45a... Jet ring body 45b... Injection nozzle 45c... Injection port 45d... Through hole 45e... Flat part 45f... Diamond electroplated layer 45g... Protrusion 46... Guiding ring 46a... Guiding ring body 46b... Recess 46c... Protrusion 46d... Through hole 48... Diamond electroplated plate 48a... Plate body 48b... Diamond electroplated layer 48c... Diamond electroplated layer 50... Input / output part 52... Raw material input pipe 54... Fine powder discharge port 56... Mesh part 110... Jet mill device 120... Base part 124... Compressed air connection port 130... Crushing part 131... Underplate 132, 134, 136... Jet ring 132a... Jet ring body 132b… Injection nozzle 132c… Diamond electroplated layer 133, 135, 137… Partition plate 133a, 135a, 137a… Opening 140, 141, 143, 144… Cavity chamber 150… Input / output part 152… Raw material input pipe 154… Fine powder discharge port 210… Jet mill device 220… Base part 224… Compressed air connection port 230… Grinding part 231… Underplate 232… First jet ring 232a… Jet ring body 232b… Injection nozzle 232c… Injection port 232d… Through hole 232e… Opening 233, 236, 239… First partition plate 233a… Partition plate body 233c… Through hole 233d… Through hole 233e… Induction groove 234, 237, 240… Second partition plate 234a… Partition plate body 234c… Through hole 234d… Through hole 234e… Supply port 235, 238, 241… Second jet ring 235a… Jet ring body 235b… Injection nozzle 235c… Injection port 235d… Through hole 235e… Opening 242… Top plate 245, 246, 247, 248… Cavity chamber 245d, 246d, 247d, 248d… Diamond electroplated layer 250… Input / output part 252… Raw material input pipe 254…Micro powder discharge port 310…Jet mill device 320…Base part 324…Compressed air connection port 330…Grinding part 331…Underplate 332, 333…First jet ring 332a, 333a…Jet ring body 332b, 333b…Injection nozzle 332 c… Injection port 332d, 333d…Through hole 332e…Opening 333…First partition plate 333a…Partition plate body 333c…Through hole 333d …Through hole 333e…Induction groove 334, 337…Second partition plate 334a…Partition plate body 334c…Through hole 334d…Through hole 334e…Supply port 335, 338…Second jet ring 335a…Jet ring body 335b…Injection nozzle 335c…Injection port 335d…Through hole 335e…Opening 336, 339…Third partition plate 336a…Partition plate body 336c…Through hole 336d…Through hole 336e…Induction groove 337, 340…Fourth partition plate 337a…Partition plate body 337a…Supply port 337c…Through hole 337d…Through hole 337e…Supply port 342…Top plate 342a…Top plate body 342c…Through hole 342d…Through hole 342e…Induction groove 345, 346, 347, 348…Hollow chamber 345d, 346d, 347d, 348d…Diamond electroplated layer 350…Input / output section 352…Raw material input pipe 354…Fine powder discharge port

Industrial applicability

[0318] The present invention can be used in the field of pulverizing materials to be pulverized to produce fine powders.

Claims

1. A cavity chamber for pulverizing a material to be pulverized into fine powder, the cavity chamber having an inner surface formed of a material harder than the hardness of the material to be pulverized, An air flow generating unit for generating a swirling air flow in the cavity chamber, A rotating body having a flat plate-shaped rotor that rotates in the cavity chamber, the rotating body having a surface of the flat plate-shaped rotor formed of a material harder than the hardness of the material to be pulverized, A flat surface portion and a notch portion are alternately formed on the outer periphery of the flat plate-shaped rotor of the rotating body, and a plurality of notches are formed on the entire outer periphery. The notch surface of the notch portion is perpendicular to the rotation direction of the flat plate-shaped rotor, The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit and collides with the notch surface of the notch portion formed on the inner surface of the cavity chamber and the outer periphery of the flat plate-shaped rotor, and is pulverized into fine powder A jet mill device characterized by the above.

2. In the jet mill device according to Claim 1, The rotating body is formed by alternately laminating the flat plate-shaped rotor and a spacer, and the diameter of the spacer is smaller than the diameter of the flat plate-shaped rotor A jet mill device characterized by the above.

3. A cavity chamber for pulverizing a material to be pulverized into fine powder, the cavity chamber having an inner surface formed of a material harder than the hardness of the material to be pulverized, An air flow generating unit for generating a swirling air flow in the cavity chamber, and At least three or more stages of the cavity chamber and the air flow generating unit are laminated via a partition plate. The second-stage cavity chamber and the air flow generating unit are laminated via the partition plate above the first-stage cavity chamber and the air flow generating unit, and the third-stage cavity chamber and the air flow generating unit are laminated via the partition plate above the second-stage cavity chamber and the air flow generating unit, The partition plate has an opening for guiding the fine powder pulverized in the lower-stage cavity chamber to the upper-stage cavity chamber, The outer diameters of the cavity chambers in the first stage, the cavity chambers in the second stage, and the cavity chambers in the third stage are the same. The opening of the partition plate provided between the cavity chamber in the first stage and the air flow generating section and between the cavity chamber in the second stage and the air flow generating section is smaller than the opening of the partition plate provided between the cavity chamber in the second stage and the air flow generating section and between the cavity chamber in the third stage and the air flow generating section. The opening of the partition plate provided between the cavity chamber in the second stage and the air flow generating section and between the cavity chamber in the third stage and the air flow generating section is smaller than the opening above the cavity chamber in the third stage and the air flow generating section. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating section and collides with the inner surface of the cavity chamber to be made into fine powder. A jet mill device characterized by the above.

4. A cavity chamber for pulverizing a material to be pulverized into fine powder, comprising a cavity chamber whose inner surface is formed of a material harder than the hardness of the material to be pulverized, and an air flow generating section for generating a swirling air flow in the cavity chamber. A plurality of stages of the cavity chambers and the air flow generating section are laminated via a partition plate. The partition plate has an opening for guiding the fine powder pulverized in the lower cavity chamber to the upper cavity chamber. The cross section of the lower cavity chamber is a polygon with six or more sides, and the cross section of the upper cavity chamber is a polygon with less than six sides. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating section and collides with the inner surface of the cavity chamber to be made into fine powder. A jet mill device characterized by the above.

5. A cavity chamber for pulverizing a material to be pulverized into fine powder, comprising a cavity chamber whose inner surface is formed of a material harder than the hardness of the material to be pulverized, and an air flow generating section for generating a swirling air flow in the cavity chamber. The plurality of stages of the cavity chambers and the air flow generating unit are stacked via a partition plate. The partition plate has an opening for guiding the fine powder pulverized in the lower cavity chamber to the upper cavity chamber. The upper cavity chamber is composed of a plurality of small cavity chambers. The partition plate has a plurality of openings for guiding the fine powder pulverized in the lower cavity chamber to the plurality of small cavity chambers in the upper part. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit and collides with the inner surface of the cavity chamber to be made into fine powder. A jet mill device characterized by the above.

6. In the jet mill device according to claim 1 or 2, A diamond electrodeposited layer formed by diamond electrodeposition processing is formed on the surface of the flat plate rotor. A jet mill device characterized by the above.

7. In the jet mill device according to any one of claims 1 to 6, A diamond electrodeposited layer formed by diamond electrodeposition processing is formed on the inner surface of the cavity chamber. A jet mill device characterized by the above.

8. A cavity chamber for pulverizing a material to be pulverized into fine powder, a cavity chamber whose inner surface is formed of a material harder than the hardness of the material to be pulverized, an air flow generating unit for generating a swirling air flow in the cavity chamber, and a rotating body having a flat plate rotor rotating in the cavity chamber, wherein the surface of the flat plate rotor is formed of a material harder than the hardness of the material to be pulverized. A pulverizing method for pulverizing the material to be pulverized into fine powder by a jet mill device in which a flat surface portion and a notch portion are alternately formed on the outer periphery of the flat plate rotor of the rotating body, a plurality of notches are formed on the entire outer periphery, and the notch surface of the notch portion is perpendicular to the rotation direction of the flat plate rotor. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, and collides with the notch surfaces of the notches formed on the inner surface of the cavity chamber and the outer periphery of the flat rotor, thereby being made into fine powder. A pulverization method characterized by this.

9. In the pulverization method according to claim 8, The rotating body is formed by alternately laminating the flat rotor and the spacer, and the diameter of the spacer is smaller than the diameter of the flat rotor. A pulverization method characterized by this.

10. A cavity chamber for pulverizing a material to be pulverized into fine powder, comprising a cavity chamber whose inner surface is formed of a material harder than the hardness of the material to be pulverized, and an air flow generating unit for generating an air flow that swirls in the cavity chamber, wherein at least three or more stages of the cavity chamber and the air flow generating unit are laminated via a partition plate, the second-stage cavity chamber and the air flow generating unit are laminated via the partition plate above the first-stage cavity chamber and the air flow generating unit, and the third-stage cavity chamber and the air flow generating unit are laminated via the partition plate above the second-stage cavity chamber and the air flow generating unit. The partition plate has an opening for guiding the fine powder pulverized in the lower-stage cavity chamber to the upper-stage cavity chamber. The outer diameters of the first-stage cavity chamber, the second-stage cavity chamber, and the third-stage cavity chamber are the same. The opening of the partition plate provided between the first-stage cavity chamber and the air flow generating unit and the second-stage cavity chamber and the air flow generating unit is smaller than the opening of the partition plate provided between the second-stage cavity chamber and the air flow generating unit and the third-stage cavity chamber and the air flow generating unit. The opening of the partition plate provided between the second-stage cavity chamber and the air flow generating unit and the third-stage cavity chamber and the air flow generating unit is smaller than the opening above the third-stage cavity chamber and the air flow generating unit. A pulverization method for pulverizing the material to be pulverized into fine powder by a jet mill device, The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, collides with each other, and the material to be pulverized collides with the inner surface of the cavity chamber, thereby being made into fine powder. A pulverization method characterized by the following.

11. A jet mill device for pulverizing a material to be pulverized into fine powder, comprising: a cavity chamber in which the inner surface is formed of a material harder than the hardness of the material to be pulverized; and an air flow generating unit for generating a swirling air flow in the cavity chamber. A plurality of stages of the cavity chamber and the air flow generating unit are laminated via a partition plate. The partition plate has an opening for guiding the fine powder pulverized in the lower cavity chamber to the upper cavity chamber. The cross section of the lower cavity chamber is a polygon with six or more sides, and the cross section of the upper cavity chamber is a polygon with less than six sides. The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, collides with the inner surface of the cavity chamber, and is pulverized into fine powder. A pulverization method for pulverizing the material to be pulverized into fine powder, The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, collides with each other, and collides with the inner surface of the cavity chamber, thereby being pulverized into fine powder. A pulverization method characterized by the following.

12. A jet mill device for pulverizing a material to be pulverized into fine powder, comprising: a cavity chamber in which the inner surface is formed of a material harder than the hardness of the material to be pulverized; and an air flow generating unit for generating a swirling air flow in the cavity chamber. A plurality of stages of the cavity chamber and the air flow generating unit are laminated via a partition plate. The partition plate has an opening for guiding the fine powder pulverized in the lower cavity chamber to the upper cavity chamber. The upper cavity chamber is composed of a plurality of small cavity chambers. The partition plate has a plurality of openings for guiding the fine powder pulverized in the lower cavity chamber to the plurality of small cavity chambers in the upper cavity chamber. A pulverization method for pulverizing the material to be pulverized into fine powder, The material to be pulverized introduced into the cavity chamber is swirled by the air flow generated by the air flow generating unit, collides with each other, and collides with the inner surface of the cavity chamber, thereby being pulverized into fine powder. A pulverization method characterized by the following.

13. In the pulverization method according to Claim 8 or 9, a diamond electrodeposited layer formed by diamond electrodeposition is formed on the surface of the flat rotor of the jet mill device, the material to be pulverized introduced into the cavity chamber is pulverized into fine powder by colliding with the diamond electrodeposited layer formed on the surface of the flat rotor, which is a characteristic of the pulverization method.

14. In the pulverization method according to any one of Claims 8 to 13, a diamond electrodeposited layer formed by diamond electrodeposition is formed on the inner surface of the cavity chamber of the jet mill device, the material to be pulverized introduced into the cavity chamber is pulverized into fine powder by colliding with the diamond electrodeposited layer formed on the inner surface of the cavity chamber, which is a characteristic of the pulverization method.

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