JP2014205100A - Agitation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agitation device capable of dispersing particles to be dispersed and mixed with excellent dispersibility.SOLUTION: The agitation device comprises: a storage tank for storing particles to be dispersed and mixed; and a rotary wing 70 disposed on a bottom of the storage tank so as to rotate freely. The rotary wing 70 comprises: a hub part 71 positioned on a central part when it rotates at the bottom of the storage tank; and plural blades 72 disposed in a radially projecting state from the hub part 71. The blades 72 are twisted to an orthogonal direction orthogonal with respect to an extension direction where a square column extends.

Description

  The present invention relates to a stirring device.

  2. Description of the Related Art Conventionally, as a stirring device that disperses, mixes, and granulates particles contained in drugs, foods, and the like in addition to a resin composition, for example, those described in Patent Document 1 are known.

  This stirring device has a configuration in which a rotating shaft protrudes into the storage tank from the bottom surface of a storage tank that stores particles, and a rotating blade is provided at the tip of the rotating shaft.

In the stirring device having such a configuration, by rotating the rotating shaft, the rotating blade provided at the tip of the rotating device rotates, and the centrifugal force generated by the rotation of the rotating blade causes the particles to move outward (radius) from the rotating shaft. And is lifted up by the ascending force of the rotor blades.
Due to the centrifugal force and upward force acting on the particles due to the rotation of the rotor blades, a curved flow (swirl flow) flowing in a spiral shape is formed in the particles in the storage tank. Are dispersed and mixed.

  However, when two or more kinds of particles having different weights are contained in the particles to be dispersed and mixed, due to the difference in weights, a difference occurs in centrifugal force and ascending force acting on the particles, As a result, particles with a light weight tend to stay on the rotating shaft side and particles with a heavy weight on the side of the storage tank. Therefore, particles with different weights can be dispersed and mixed with excellent dispersibility. There is a problem that can not be.

JP 2002-253945 A

  An object of the present invention is to provide a stirring device capable of dispersing particles to be dispersed and mixed with excellent dispersibility.

Such an object is achieved by the present invention described in the following (1) to (4).
(1) A stirrer having a storage tank for storing particles to be dispersed and mixed, and a rotary blade disposed rotatably at the bottom of the storage tank,
The rotary blade includes a hub portion located at the center when rotating at the bottom of the storage tank, and a plurality of blade portions provided radially projecting from the hub portion,
The stirrer characterized in that the blade part is twisted in an orthogonal direction orthogonal to an extending direction in which the prism is extended.

  (2) The stirring device according to (1), wherein the blade portion is a quadrangular prism twisted in the orthogonal direction.

  (3) The stirrer according to (1) or (2), wherein the blade portion has a regular prism twisted in the orthogonal direction.

  (4) The stirring device according to any one of (1) to (3), wherein the blade portion is disposed in the hub portion along a bottom surface of the storage tank.

  According to the present invention, since the blade portion included in the rotating blade is twisted in the orthogonal direction orthogonal to the extending direction in which the prism extends, the stirring device including the rotating blade has excellent particles. It can be dispersed with dispersibility.

It is a longitudinal cross-sectional view which shows 1st Embodiment of the stirring apparatus of this invention. It is a perspective view of the rotary blade with which the stirring apparatus shown in FIG. 1 is provided. It is the elements on larger scale which expanded the fixing location of a rotary blade partially in the stirring apparatus shown in FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the stirring apparatus of this invention. It is a perspective view of the rotary blade with which the stirring apparatus of a comparative example is provided. It is a graph which shows the relationship between stirring time [sec] and the number ratio [%] of SUS in the stirring apparatus of an Example and a comparative example.

  Hereinafter, the stirring device of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

  The stirring device of the present invention includes a storage tank that stores particles to be dispersed and mixed, and a rotary blade that is rotatably arranged at the bottom of the storage tank. A hub portion located at the center when rotating at the bottom portion, and a plurality of blade portions that project radially from the hub portion, the blade portions being orthogonal to the extending direction in which the prisms extend It is characterized by being twisted in the direction.

  Here, when the rotor blades rotate, the centrifugal force acts on the particles stored in the storage tank by the plurality of blade parts that protrude radially from the hub part. A curvilinear flow (convection) flowing in a spiral curve is formed.

  At this time, in the conventional agitation device, among the particles stored in the storage tank, those having a light weight tend to stay on the hub portion side, and those having a heavy weight tend to stay on the side surface side of the storage tank. Has a problem that it cannot be dispersed and mixed with excellent dispersibility.

  On the other hand, in this invention, it is set as the thing of the structure twisted by the orthogonal | vertical direction orthogonal to the extending | stretching direction where a prism extends | stretches a blade | wing part. By making the blade part have such a configuration, for particles staying on the hub part side, a force directed to the side surface side of the storage tank is applied, and for particles staying on the side surface side of the storage tank, Since a force toward the hub portion can be applied, particles having different weights stored in the storage tank can be dispersed and mixed with excellent dispersibility.

<Agitator>
<< First Embodiment >>
FIG. 1 is a longitudinal sectional view showing a first embodiment of the stirring device of the present invention, FIG. 2 is a perspective view of a rotor blade provided in the stirring device shown in FIG. 1 (FIG. 2A is a perspective view of the rotor blade). 2 (b) is a partially enlarged perspective view in which the region surrounded by the two-dot chain line shown in FIG. 2 (a) is partially enlarged. FIG. 3 shows the fixing of the rotor blades in the stirring device shown in FIG. It is the partial expansion longitudinal cross-sectional view which expanded the location partially. In the following description, for convenience of explanation, the upper side in FIGS. 1 to 3 is referred to as “upper” and the lower side is referred to as “lower”.

  An agitation device 100 shown in FIG. 1 includes an outer box 10 for storing each member, a storage tank 30 for storing particles (powder) to be dispersed and mixed, and a particle supply unit 20 for supplying particles to the storage tank 30. , A rotary blade (first rotary blade) 70 rotatably disposed at the bottom of the storage tank 30, a drive unit (first drive unit) 80 that rotates the rotary blade 70, and controls the operation of these units. And a control unit 15.

  The outer box 10 forms a casing of the stirring device 100 that houses each member constituting the stirring device 100.

  The outer box 10 is made of, for example, metal or synthetic resin, and is open on the upper surface thereof.

  Moreover, the leg part 11 for supporting the outer box 10 on a floor is provided in the bottom part of the outer box 10 in the edge part at equal intervals, respectively. In addition, at least one of the plurality of leg portions 11 is configured by a screw leg whose height can be changed, and the outer box 10, that is, the stirring device 100 is kept horizontal by rotating a screw included in the screw leg. .

  The storage tank 30 is disposed inside the outer box 10, stores particles (powder) to be dispersed and mixed, and the storage tank 30 is rotated by rotation of the rotary blade 70 disposed at the bottom of the storage tank 30. The particles are uniformly dispersed and mixed.

  In the present embodiment, the storage tank 30 has a single tank configuration, and is opened by the opening 12 provided on the upper surface thereof, the lower half has a bottomed cylindrical shape, and the upper half has an inner diameter. Has a funnel-like shape that gradually decreases toward the upper side. In such a state, the storage tank 30 is provided with a support column 35 and a support column 37 provided in the storage tank 30 and the outer box 10 respectively, and a support plate 36 to which the support columns 35 and 37 are connected at both ends. And supported by the inner wall of the outer box 10.

  In addition, on the bottom surface 33 of the storage tank 30, a rotating blade 70 for generating a curvilinear flow that flows in a spiral curve is disposed in the particles stored in the storage tank 30, and in the present invention, Although the configuration of the rotary blade 70 is characteristic, the description thereof will be given later.

  Further, an insertion hole 31 for inserting the rotation shaft 90 is provided at the center of the bottom surface 33 of the storage tank 30, and the rotor blade 70 is connected to the tip of the rotation shaft 90 inserted through the insertion hole 31. Yes.

The drive unit 80 is disposed outside the bottom surface side of the storage tank 30 and rotates the rotary blade 70.
The drive unit 80 is connected to a rotary shaft (first rotary shaft) 90 extending downward along the axis from the center of the rotary blade 70, and is connected to the lower end of the rotary shaft 90. The rotating blade 70 is rotated through the rotating shaft 90 by rotating the motor 81.

  Furthermore, the rotating shaft 90 includes a screw hole 98 formed at the tip thereof. Further, as will be described later, the rotary blade 70 includes a hub portion 71 and a blade portion 72. The hub portion 71 is fixed to the first member 73 having a cylindrical shape by screwing on the distal end side thereof. And a second member 74 having a conical shape. In the rotary shaft 90 and the rotary blade 70 having such a configuration, the screw screw 98 is screwed into the screw hole 98 while being inserted into the insertion hole 76 formed in the center of the first member 73. A rotating shaft 90 is fixed to the wing 70. That is, the rotary blade 70 and the rotary shaft 90 are connected.

  By fixing the rotary shaft 90 to the rotary blade 70 as described above, the rotary blade 70 can be rotated on the bottom surface 33 of the storage tank 30 by rotating the rotary shaft 90. Further, the rotary blade 70 is detached from the rotary shaft 90 by removing the set screw 75 from the screw hole 98 using a screwdriver or the like.

  Through this, the particle supply unit 20 supplies particles into the storage tank 30, and before the curved blade flow is generated in the resin composition by the rotation of the rotary blade 70, that is, before the rotation of the rotary blade 70. The particles are supplied to the storage tank 30.

  The particle supply unit 20 has a lid 41 provided so as to close the opening 12 of the storage tank 30 that opens on the upper surface of the outer box 10. The lid portion 41 is coupled to the upper surface of the outer box 10 via a hinge portion, and is thereby provided in the opening portion 12 so as to be freely opened and closed. The lid 41 may be opened and closed manually or automatically by the operation of the control unit 15.

  When the lid 41 is opened, particles are supplied into the storage tank 30 through the opening 12.

  Further, an annular sealing material 13 is provided at the edge of the opening 12, and the upper surface side of the sealing material 13 comes into contact with the bottom surface side of the lid 41 when the lid 41 is closed. A sealed space 14 that is sealed by the storage tank 30 and the lid portion 41 is formed. Even if the rotary blade 70 accommodated in the inside is rotated by the sealing material 13 being deformed and pressed toward the bottom surface side of the lid 41 by such a sealed space 14, the sealing performance is maintained.

  The control unit 15 is provided at the upper part of the outer box 10 and is configured by combining, for example, a CPU, a memory, and the like. The operation of each part of 100 is controlled. Thereby, supply of the particles to be dispersed / mixed to the storage tank 30 and dispersion / mixing of the particles in the storage tank 30 are performed.

  As described above, the present invention is characterized in the configuration of the rotary blade 70 disposed on the bottom surface 33 of the storage tank 30.

  That is, the rotary blade 70 includes a hub portion 71 located at the center when rotating at the bottom of the storage tank 30, and a plurality of blade portions 72 provided radially projecting from the hub portion 71. Is twisted in an orthogonal direction orthogonal to the extending direction in which the prisms extend.

  The hub portion 71 supports the plurality of blade portions 72 and transmits the output from the rotating shaft 90 to the blade portions 72.

  In the present embodiment, as shown in FIG. 3, the hub portion 71 includes a first member 73 having a cylindrical shape located on the lower side and a second member 74 having a conical shape located on the upper side. These are configured and fixed (joined) by screwing a male screw formed below the first member 73 and a female screw formed below the second member 74.

  The blade portion 72 is provided in a plurality (three in the present embodiment) projecting radially from the hub portion 71, and the blades 72 are centrifugally separated into particles stored in the storage tank 30 by the rotation of the rotating shaft 90 connected to the hub portion 71. It is for applying force. Then, by the action of the centrifugal force, a curved flow that flows in a spiral shape is formed in the particles in the storage tank 30.

  In this embodiment, the blade portion 72 that forms such a curved flow is orthogonal to the extending direction (X-axis direction in FIG. 2) in which the quadrangular prism extends (Z-axis direction in FIG. 2). It is twisted by.

  By thus twisting the quadrangular column in the orthogonal direction, the four side surfaces constituting the quadrangular column each constitute an inclined surface inclined with respect to the extension axis (center axis) of the quadrangular column.

  Therefore, when the rotary blade 70 is rotated, as shown in FIG. 2B, among the particles staying on the hub portion 71 side, the particles in the storage tank 30 are in contact with the side surfaces (inclined surfaces) of the quadrangular columns. A force directed toward the side surface can be applied, and further, a force directed toward the hub portion 71 is applied to the particles staying on the side surface of the storage tank 30 that are in contact with the side surface of the quadrangular column. Can do. Therefore, the lighter one of the particles tends to stay on the hub portion 71 side, and the heavier one of the particles tends to stay on the side surface of the storage tank 30, but this tendency can be reliably suppressed or prevented. Therefore, particles having different weights stored in the storage tank 30 can be dispersed and mixed with excellent dispersibility. That is, the particles stored in the storage tank 30 can be uniformly dispersed and mixed.

  The side surfaces (inclined surfaces) of the quadrangular prisms may be either concave surfaces or flat surfaces, but are preferably configured with concave surfaces. By making the side surface of the quadrangular prism concave, it is possible to accurately suppress or prevent the particles captured by this side surface (concave surface) from separating from the side surface due to the rotation of the blade portion 72. Therefore, the particles staying on the hub portion 71 side can be reliably moved to the side surface side of the storage tank 30, and the particles staying on the side surface side of the storage tank 30 can be reliably moved to the hub portion 71 side. it can.

  Moreover, the blade | wing part 72 is arrange | positioned by the side surface of the 1st member 73 of the hub part 71 so that the bottom face 33 of the storage tank 30 may be followed. Thereby, since a curvilinear flow can be formed in the particles from the bottom surface 33 of the storage tank 30, the particles can be dispersed and mixed with better dispersibility.

  Further, the blade portion 72 has a twist angle of 180 ° for twisting the quadrangular prism in the orthogonal direction, and this twist angle is preferably 90 ° or more and 360 ° or less, 120 ° or more and 180 °. The following is more preferable. By setting the twist angle within such a range, a concave surface curved toward the stretching axis can be reliably formed, and the concave surface is inclined at an appropriate angle with respect to the stretching axis. Therefore, the particles can be dispersed and mixed with better dispersibility.

  In the present specification, “twist angle” refers to a base of one side surface constituting a quadrangular column when the quadrangular column is twisted in the orthogonal direction and viewed from the extending direction (axial direction). It means the angle formed by one side of the end side and one side of the tip side.

  In addition, the diameter of the particles having the maximum particle size among the particles stored in the storage tank 30 is A [mm], and the length of the longest one of the four sides of the quadrilateral formed in the vertical cross section in the orthogonal direction is B [ mm], it is preferable to satisfy the relationship 1 <B / A, and it is more preferable to satisfy the relationship 1.5 <B / A <100,000. By setting B / A within such a range, the particles in contact with the blade portion 72 can be reliably captured by the inclined surface formed by twisting the square column. Therefore, a force toward the side surface of the storage tank 30 can be applied to the particles that stay on the side of the quadrangular column among the particles staying on the hub portion 71 side, and further, the particles stay on the side surface side of the storage tank 30. A force toward the hub portion 71 can be applied to the particles that come into contact with the side surfaces of the quadrangular prism.

  The constituent material of the rotor blade 70 is not particularly limited. For example, various resin materials and various metal materials are used. Specifically, polyolefins such as polyethylene and polypropylene, cyclic polyolefins, modified polyolefins, polyvinyl chloride, polyamides are used. , Polyimide, polyamideimide, polycarbonate, acrylic resin, resin material such as acrylonitrile-styrene copolymer (AS resin), cemented carbide, aluminum or aluminum alloy, SUS201, SUS301, SUS304, SUS316, SUS420, SUS403, etc. Examples thereof include metal materials such as stainless steel, titanium, and titanium alloys, and a combination of one or more of these materials can be suitably used.

  When the rotor blade 70 is made of a metal material, the surface thereof is surface-treated with a ceramic material such as aluminum nitride, boron nitride, alumina, silicon nitride alumina, hydroxyapatite, or zirconia. Also good.

  Next, a method of dispersing and mixing particles (powder) using the above-described stirring device 100 will be described below. That is, the operation of the stirring device 100 will be described.

<1> First, the lid 41 is opened, and particles (powder) are supplied into the storage tank 30 through the opening 12.
That is, the particles are supplied into the storage tank 30 through the particle supply unit 20.

  As this particle, each particle may be composed of the same constituent material, or two or more kinds of particles composed of different constituent materials are included, and each particle is composed of different constituent materials. May be included. When each particle is composed of the same constituent material, each particle is composed of a different constituent material for the purpose of dispersing and mixing particles having different particle sizes with a uniform particle size distribution. In the case of including particles, the particles are dispersed and mixed using the stirring device 100 for the purpose of uniformly dispersing and mixing particles having different constituent materials. The reason why the particles cannot be uniformly dispersed / mixed may be that the weight, shape, size, etc. of each particle are different. The weight of each particle is different because the particle diameter is different, the specific gravity of the constituent material of the particle is different, and the like.

  Further, the constituent material of the particles is not particularly limited. For example, silicates such as talc, calcined clay, unfired clay, mica, glass, titanium oxide, alumina, fused spherical silica, fused crushed silica, crystalline silica, etc. Oxides such as silica powder, carbonates such as calcium carbonate, magnesium carbonate, hydrotalcite, hydroxides such as aluminum hydroxide, magnesium hydroxide, calcium hydroxide, sulfuric acid such as barium sulfate, calcium sulfate, calcium sulfite Inorganic materials such as salts or sulfites, borates such as zinc borate, barium metaborate, aluminum borate, calcium borate, sodium borate, nitrides such as aluminum nitride, boron nitride, silicon nitride, aluminum Or aluminum alloy, SUS201, SUS301, SUS304, SUS 16, stainless steel such as SUS420 and SUS403, metal material such as titanium or titanium alloy, polyethylene resin, polycarbonate resin, polymethylmethacrylate resin, polyimide resin, polysulfone resin, polyferylene sulfide resin, polyetheretherketone resin, polyacetal Resin, liquid crystal polymer resin, polybutylene terephthalate resin, polytetrafluoroethylene resin, epoxy resin, phenoxy resin, silicone resin, oxetane resin, phenol resin, (meth) acrylate resin, polyester resin (unsaturated polyester resin), diallyl phthalate resin Resin materials such as maleimide resin and bismaleimide-triazine resin, and ceramic materials such as alumina and hydroxyapatite. That.

<2> Next, the lid 41 is closed, and the rotating blade 70 is rotated in this state.
That is, the control unit 15 controls the operation of the driving unit 80 to rotate the rotating shaft 90, and the rotating blade 70 connected to the rotating shaft 90 is rotated on the bottom surface 33 of the storage tank 30 by this rotation.

  Due to the rotation of the rotary blade 70, the blade portion 72 protruding from the hub portion 71 rotates, and due to this, centrifugal force acts on the particles stored in the storage tank 30, so that the particles in the storage tank 30 are affected. A curvilinear flow (spiral flow) flowing in a curvilinear curve is formed.

  Further, the blade portion 72 is twisted in an orthogonal direction orthogonal to the extending direction in which the quadrangular column extends, and thus contacts the side surface of the quadrangular column among the particles staying on the hub portion 71 side. A force toward the side surface of the storage tank 30 can be applied to what is to be stored. Further, among the particles staying on the side surface side of the storage tank 30, a hub that contacts the side surface of the quadrangular column is used. A force toward the portion 71 side can be applied. Therefore, it is possible to reliably suppress or prevent particles having a light weight from staying on the hub portion 71 side and particles having a heavy weight from staying on the side surface side of the storage tank 30. The particles having different weights stored in can be dispersed and mixed with excellent dispersibility.

  The rotational speed of the rotary blade 70 is slightly different depending on the kind of particles to be dispersed and mixed, but is preferably about 10 to 5000 rpm, and more preferably about 50 to 3000 rpm. Thereby, particles with different weights stored in the storage tank 30 can be dispersed and mixed with better dispersibility. In addition, in the stirring apparatus of this invention, since a blade | wing part is twisted in the said orthogonal direction as above-mentioned, particle | grains can be disperse | distributed and mixed highly efficiently. Accordingly, since the particles can be dispersed and mixed even at a relatively low rotational speed, that is, in a mild condition as in the above range, the particles may be worn out or the particles may be melted (powder melting) ) Can be accurately suppressed or prevented.

<3> Next, after the dispersion in the resin composition is completed, the rotation of the rotary blade 70 is stopped, and then the lid 41 is opened, and the dispersed and mixed particles are taken out from the inside of the storage tank 30.

  Through the above steps, uniformly dispersed and mixed particles can be obtained.

  In the present embodiment, the blade portion 72 provided to protrude from the hub portion 71 is one in which the lengths of the sides of the longitudinal section in the orthogonal direction are adjacent and different square pillars are twisted in the orthogonal direction. Although a case has been described, the present invention is not limited to such a case, and the blade portion 72 may be, for example, a regular rectangular column having the same length of each side of the longitudinal section in the orthogonal direction twisted in the orthogonal direction. Alternatively, a polygonal column different from the quadrangular column may be twisted in the orthogonal direction.

  However, as in the present embodiment, the blade 72 has the rectangular column twisted in the orthogonal direction, so that the length of each side of the longitudinal section in the orthogonal direction can be reduced by the side surface of the rectangular column. Can be easily set to a size large enough to capture Therefore, it is possible to reliably apply a force toward the side surface (side wall) of the storage tank 30 to particles that contact the side surface of the quadrangular column among the particles staying on the hub portion 71 side. Of the particles staying on the side surface of each of the particles, the force that contacts the side surface of the quadrangular column can be reliably applied to the force toward the hub portion 71 side.

  Further, as in the present embodiment, the blade portion 72 has a regular prism twisted in the orthogonal direction so that the length of each side of the longitudinal section in the orthogonal direction has a uniform size. Can be. Therefore, the force toward the side surface of the storage tank 30 can be made to uniformly act on the particles staying on the hub portion 71 side that come into contact with each side surface of the regular prism. For the particles staying on the side that come into contact with the side surfaces of the regular prism, the force toward the hub portion 71 can be applied uniformly.

  Moreover, in this embodiment, although the blade | wing part 72 demonstrated the case where a square pole was twisted by the fixed twist angle in the said orthogonal direction, it is not limited to such a case, The blade | wing part 72 is, for example, The twist angle may be large on the base end (hub portion 71) side, and the twist angle may be small on the tip end (side surface of the storage tank 30). The twist angle may be small on the base end (hub portion 71) side, and the twist angle may be large on the distal end (side surface of the storage tank 30) side.

  Furthermore, in this embodiment, the case where particles (powder) are dispersed and mixed using the stirrer 100 has been described. However, the present invention is not limited to this, and the stirrer 100 is used for granulating particles (powder). You can also.

  In this case, in the step <1> among the steps <1> to <3>, the particles can be granulated by supplying the particles to be granulated and the binder into the storage tank 30.

  Although it does not specifically limit as particle | grains which should be granulated, For example, the inorganic material mentioned above, a resin material, a ceramic material, etc. are mentioned. In addition, one kind of particles composed of the same material may be granulated, or two or more kinds of particles composed of different materials may be mixed and granulated.

  The binder is not particularly limited. For example, polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), zinc stearate, lithium stearate, calcium stearate, ethylene bisstearamide, ethylene vinyl copolymer, paraffin, Examples thereof include wax, sodium alginate, agar, gum arabic, resin, sucrose, and the like, and one or more of these can be used in combination. The binder may be either solid or liquid when supplied to the inside of the storage tank 30. Further, when the binder is solid, it may be in powder form. Good.

  In addition, the compounding quantity of a binder is although it does not specifically limit, Usually, it is preferably set in the range of 5 to 30 weight% with respect to the mixture of particle | grains and a binder.

<< Second Embodiment >>
Hereinafter, 2nd Embodiment of the stirring apparatus of this invention is described.

  FIG. 4 is a longitudinal sectional view showing a second embodiment of the stirring device of the present invention. In the following description, for convenience of explanation, the upper side in FIG. 4 is referred to as “upper” and the lower side is referred to as “lower”.

  Hereinafter, the stirring device 100 illustrated in FIG. 4 will be described, but the description will focus on differences from the stirring device 100 illustrated in FIG. 1, and description of similar matters will be omitted.

  In addition to the rotating blade (first rotating blade) 70 that rotates at the bottom of the storage tank 30, the stirring device 100 illustrated in FIG. 4 further includes a second rotating blade 77 that is rotatably disposed above the rotating blade. Except this, it is the same as the stirring apparatus 100 shown in FIG.

  That is, in the present embodiment, the second rotary blade 77 is symmetrically with respect to the hub portion 71 of the rotary blade 70 so as not to contact the upper portion of the rotary blade (first rotary blade) 70. Each of the four is arranged in the storage tank 30. The four second rotary blades 77 arranged symmetrically are arranged in a direction perpendicular to the blade portion 72 of the rotary blade 70, and 2 of these are located on the hub portion 71 side. The two pieces and the two pieces located on the side surface side of the storage tank 30 are arranged so as to face each other.

  Such a second rotary blade 77 is rotated by the operation of the second drive unit connected thereto. This rotation makes it possible to generate a turbulent flow in the upper part of the curvilinear flow that flows in a curvilinear curve generated by the rotation of the rotary blade 70, and thus the flow of the curvilinear flow is complicated. As a result, the curvilinear flow breaks away from the monotonous spiral shape, and as a result, the movement inside the particles becomes complicated, so that the particles are dispersed and mixed with better dispersibility.

  Further, the second drive unit 85 that rotates the second rotary blade 77 is disposed outside the side surface of the storage tank 30.

  The second drive unit 85 extends from the center of the second rotary blade 77 in the left-right direction along the axis, and the second rotary shaft has both ends fixed on the side surfaces of the storage tank 30. 95 and a second motor 86 that is connected to the base end (left end portion) of the second rotation shaft 95 and rotates the second rotation shaft 95 around the second rotation shaft 95. By rotating 86, the rotary blade 70 is rotated via the second rotation shaft 95.

  In addition, the second driving unit 85 includes a support column 87 and a support column 89 provided in the storage tank 30 and the outer box 10, respectively, and a support plate 88 in which the support columns 87 and 89 are connected to both ends. The inner wall of the outer box 10 is supported.

  The stirrer 100 of this embodiment having such a configuration can also be used in the same manner as the stirrer 100 of the first embodiment, and the same effect as the stirrer 100 of the first embodiment can be obtained.

  In the present embodiment, the case where eight second rotary blades 77 are provided in the storage tank 30 has been described, but the number thereof is not limited thereto. Moreover, the shape is not limited to the shape in which the tip portion is curved, and any shape may be used as long as turbulent flow can be generated in the curved flow.

  As mentioned above, although the stirring apparatus of this invention was demonstrated, this invention is not limited to these.

  For example, the configuration of each part of the stirring device of the present invention can be replaced with any one that can exhibit the same function, or can be added with any configuration.

  Specifically, in the stirring device of the present invention, a discharge port is provided near the bottom surface of the storage tank, and when the dispersed and mixed particles are taken out, the discharge port is rotated. It is also possible to push the particles into the particles and thereby take out the particles through the outlet.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to this.

<Agitator>
(Example)
As shown in FIG. 2, a stirring device provided with a rotating blade 70 as a blade portion 72 having a quadrangular prism twisted in the orthogonal direction was prepared as a stirring device of the example.

(Comparative example)
As shown in FIG. 5, the rotating blade 70 </ b> B includes a blade portion 72 </ b> B having a curved portion 73 </ b> B that curves upward at the tip and an inclined surface 74 </ b> B that scoops up particles. Prepared as.

<Powder>
As powder (particles) to be dispersed and mixed using a stirrer, alumina powder (specific gravity: 3.60, average particle size: 3.0 mm) and SUS powder (specific gravity: 7.93, average particle size) : 3.0 mm) was prepared so that the number of these powders was approximately the same.

<Dispersion and mixing of powder using stirrer>
<1> First, regarding the stirring devices of Examples and Comparative Examples, when the storage tank of the stirring device is viewed in plan view, alumina powder is disposed on the left half thereof, and SUS powder is further disposed on the right half. Arranged.

<2> Next, in the stirring devices of Examples and Comparative Examples, alumina powder and SUS powder were dispersed and mixed by rotating the rotary blades at a rotation speed of 100 rpm.

<3> Then, in the stirring devices of Examples and Comparative Examples, the midpoints of line segments connecting the center of the hub portion and the side surface of the storage tank at 30 sec, 60 sec and 300 sec after the start of rotation of the rotor blades, respectively. In the vicinity, a part of the dispersed (mixed) powder (particles) was collected.

  FIG. 6 shows the result of the number ratio [%] of the SUS powder in the powder collected as described above.

  As apparent from FIG. 6, in the stirring apparatus of the example, the number ratio of the SUS powder in the vicinity of the midpoint is about 57%, and the alumina powder and the SUS powder are dispersed and mixed almost uniformly. I found out.

  On the other hand, in the stirring device of the comparative example, the number ratio of the SUS powder in the vicinity of the midpoint is about 25%, and light alumina powder is unevenly distributed in the vicinity of the midpoint. As a result, SUS powder having a heavy weight was unevenly distributed on the side surface side of the storage tank.

DESCRIPTION OF SYMBOLS 100 Stirring apparatus 10 Outer box 11 Leg part 12 Opening part 13 Sealing material 14 Sealed space 15 Control part 20 Particle supply part 30 Reservoir 31 Insertion hole 33 Bottom face 35 Support pillar 36 Support plate 37 Support pillar 41 Cover part 70 Rotary blade 71 Hub Portion 72 blade portion 73 first member 74 second member 75 set screw 76 insertion hole 77 second rotary blade 70B rotary blade 72B blade portion 73B curved portion 74B inclined surface 80 drive portion 81 motor 85 second drive portion 86 Second motor 87 Support column 88 Support plate 89 Support column 90 Rotating shaft 95 Second rotating shaft 98 Screw hole

Claims (4)

A stirrer having a storage tank for storing particles to be dispersed and mixed, and a rotor blade rotatably disposed at the bottom of the storage tank,
The rotary blade includes a hub portion located at the center when rotating at the bottom of the storage tank, and a plurality of blade portions provided radially projecting from the hub portion,
The stirrer characterized in that the blade part is twisted in an orthogonal direction orthogonal to an extending direction in which the prism is extended.   The stirring device according to claim 1, wherein the blade portion is a quadrangular prism twisted in the orthogonal direction.   The stirrer according to claim 1 or 2, wherein the blade portion has a regular prism twisted in the orthogonal direction.   The said blade | wing part is a stirring apparatus of any one of Claim 1 thru | or 3 arrange | positioned at the said hub part along the bottom face of the said storage tank.

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