Container rotary mixer and mixing method

Abstract

To provide a container rotary mixing machine capable of precisely mixing material to be projected into a container.SOLUTION: A chopper which is attached to a container of a container rotary mixing machine includes a rotation shaft which is arranged within the container and is attached to the container, a motor which is arranged on an outer part and rotation-drives the rotation shaft, first rotary vanes which are fixed to the rotation shaft, have point symmetrical shape around the rotation shaft as a center and are located on the opposite direction side different from the rotation direction side of the rotation shaft with respect to segments elongated in radial direction of the rotation shaft and second rotation vanes which are fixed to the rotation shaft, have point-symmetrical shape with respect to the rotation shaft and are arranged between the container and the first rotation vanes. The first rotation vanes have an extrusion face which extrudes material toward an inner wall face when rotating rotation shaft as the face of the inner wall face side which is inclined so that the rotation direction back side gets close to the inner wall face around the rotation shaft attaching position of the container from the rotation direction front side of the rotation shaft.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container rotary mixer that mixes materials put into a container by rotating the container, and a mixing method using the container rotary mixer. [Background technology]

[0002] Patent Document 1 and the like describe a mixer that mixes and stirs multiple types of powders and granular materials placed in a container by rotating agitating blades attached to the container and inserted into the container.

[0003] Recently, systems have emerged that use independently transportable containers instead of piping between processes in a production line for producing a mixture of multiple types of powders and granules, allowing materials such as powders and granules to be transported in their containerized state. One known mixing method in this system is to mix multiple materials placed in a container by rotating the container itself using a container blender. In this mixing method, to improve mixing efficiency, the materials are mixed macroscopically by rotating the container itself with the container blender, and lumps of materials are crushed by a chopper attached to the container's lid or the like that closes the container's inlet, resulting in a microscopic mixture. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-199108 Summary of the Invention [Problem to be solved by the invention]

[0005] The chopper described above is composed of a motor attached to the outside of the container, a rotating shaft inserted into the container, and multiple rotating blades fixed to the rotating shaft, and the rotating shaft and rotating blades are rotated at a high speed of 1000 to 2000 rpm to crush and mix the material that hits the rotating blades. However, even if the area around the rotating blades is filled with material while the rotating shaft and rotating blades are rotating at high speed, the space formed between the rotating blades becomes hollow, and the material only comes into contact with the tip of the rotating blade, resulting in a problem in that the material cannot be efficiently crushed and mixed.

[0006] An object of the present invention is to provide a container rotary mixer that can accurately mix materials put into a container, and a mixing method using the container rotary mixer. [Means for solving the problem]

[0007] The container rotary mixer of the present invention is a container rotary mixer that mixes materials introduced into a container by rotating the container, and is equipped with a chopper attached to the container, the chopper being arranged inside the container and equipped with a rotating shaft attached to the container, a motor arranged outside the container and driving the rotating shaft to rotate, a first rotating blade fixed to the rotating shaft and having a point-symmetric shape with respect to the rotating shaft as the center and positioned on the opposite side of a line segment extending in the radial direction of the rotating shaft from the rotation direction side of the rotating shaft, and a second rotating blade fixed to the rotating shaft and having a point-symmetric shape with respect to the rotating shaft and arranged between the container and the first rotating blade, and the first rotating blade has an extrusion surface on the inner wall surface side that is inclined so that the rear side in the rotation direction of the rotating shaft approaches the inner wall surface around the rotating shaft mounting position of the container rather than the front side in the rotation direction of the rotating shaft, and extrudes the materials toward the inner wall surface when the rotating shaft is rotated.

[0008] The first rotating blade of the container rotary mixer of the present invention is characterized in that it has a winding portion which is an edge portion on the front side of the rotation direction of the rotating shaft that has an angle from the tip of the first rotating blade toward the opposite direction different from the rotation direction of the rotating shaft with respect to a line segment extending in the radial direction of the rotating shaft, and which winds up the material in a direction toward the rotating shaft when the rotating shaft is rotated.

[0009] The first rotating blade of the container rotary mixer of the present invention is characterized in that it has, at the tip of the first rotating blade, a striking surface that is exposed toward the rotation direction of the rotating shaft and strikes the material when the rotating shaft is rotated.

[0010] The first rotary blade of the container rotary mixer of the present invention is characterized in that it has a curved shape that is recessed toward the inner wall surface around the rotary shaft mounting position of the container.

[0011] The second rotary blade of the container rotary mixer of the present invention is characterized in that it does not have a surface that pushes the material toward the inner wall surface around the rotary shaft attachment position of the container when the rotary shaft is rotated.

[0012] The container rotary mixer of the present invention is characterized in that the rotation shaft extends in a direction perpendicular to the inner wall surface of the container around the rotation shaft mounting position.

[0013] The container of the container rotary mixer of the present invention is characterized in that it can be transported independently.

[0014] The container of the container rotary mixer of the present invention is characterized in that it has an inlet for introducing the material and a lid for closing the inlet, and the chopper is attached to the lid.

[0015] Furthermore, the mixing method of the present invention is a mixing method using the container rotary mixer of the present invention, which mixes materials put into the container by rotating the container, and is characterized by including: a feeding step of feeding the materials into the container; a first mixing step of mixing the materials by rotating the container; and a second mixing step of rotating the rotating shaft to extrude the materials that hit the extrusion surface of the first rotating blade toward the inner wall surface around the rotating shaft mounting position of the container, and pulverize and mix the materials that hit the first rotating blade and the second rotating blade. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a container rotary mixer that can mix materials put into a container with high precision, and a mixing method using the container rotary mixer. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing a configuration of a container rotary mixer according to an embodiment. FIG. [Figure 2] 1 is a cross-sectional view showing the configuration of an intermediate bulk container according to an embodiment of the present invention. [Figure 3] FIG. 2 is a perspective view showing a configuration of a chopper according to the embodiment. [Figure 4] FIG. 2 is a perspective view showing a configuration of a chopper according to the embodiment. [Figure 5] FIG. 2 is a front view showing the configuration of a chopper according to the embodiment. [Figure 6] FIG. 2 is a plan view showing the configuration of a chopper according to the embodiment. [Figure 7] 1 is a cross-sectional view showing the configuration of an intermediate bulk container according to an embodiment of the present invention. [Figure 8] FIG. 10 is a diagram illustrating the flow direction of material in an intermediate bulk container. [Figure 9] 4 is a graph showing a current value of a motor according to an example. DETAILED DESCRIPTION OF THE INVENTION

[0018] A container rotary mixer according to an embodiment will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of a container rotary mixer according to this embodiment. As shown in FIG. 1, a container rotary mixer 2 according to this embodiment includes a container blender 4 for rotating the container and an intermediate bulk container (IBC, hereinafter simply referred to as the container) 6 that functions as a storage container and / or a transport container. The container rotary mixer 2 is used in a mixing process in a production line that produces a mixture of multiple types of powdered or granular materials, in which materials such as powdered or granular materials are mixed in a preceding feeding process. The container rotary mixer 2 mixes materials 14 (see FIG. 2) fed into an independently transportable container 6 by rotating the container 6 itself with the container blender 4. In the following description, an XYZ Cartesian coordinate system is set as shown in FIG. 1, and the positional relationship of each component will be described with reference to this Cartesian coordinate system. The X axis is horizontal, extending left and right on the plane of FIG. 1, the Y axis is horizontal, extending perpendicular to the plane of FIG. 1, and the Z axis is vertical.

[0019] The container blender 4 includes a box 8 that houses a lifting motor (not shown), a rotary motor (not shown), a control panel (not shown), an assembly 10 for fixing the container 6, and a rotary shaft 12 for rotating the assembly 10. When a container 6 containing materials 14 is transported in the preceding material charging process, the container blender 4 fixes the container 6 to the assembly 10 and rotates the assembly 10 about the rotary shaft 12 in the direction of arrow R1 shown in FIG. 2, thereby rotating the container 6 itself and macro-mixing the materials 14 contained in the container 6. Note that FIG. 1 is a diagram showing the state in which the assembly 10 fixes the container 6.

[0020] Fig. 2 is a cross-sectional view showing the configuration of the container 6. The container 6 is a container that can be attached to and detached from the container blender 4. As shown in Fig. 2, the container 6 includes a container body 16 that stores the material 14, an inlet 18 for feeding the material 14, a lid 20 for closing the inlet 18, an outlet 22 for discharging the mixed material 14 from the container body 16, a cone valve 23 attached to the outlet 22, and a chopper 24 attached to the lid 20.

[0021] The container body 16 has a rectangular cylindrical upper portion (the +Z direction side in FIG. 2 ) and a hollow inverted truncated pyramid lower portion (the −Z direction side in FIG. 2 ) and accommodates the material 14, such as powder or granular material. The container body 16 may have other shapes. The inlet 18 is an opening formed in the upper portion (the +Z direction side in FIG. 2 ) of the container body 16, through which the material 14, such as granular powder, is introduced into the container body 16 in a material introduction step before the container 6 is attached to the container blender 4. The outlet 22 is an opening formed in the lower portion (the −Z direction side in FIG. 2 ) of the container body 16, through which the material 14 is discharged from the container body 16 in a material discharge step after the material 14 in the container 6 is mixed. The cone valve 23 is a cone-shaped valve that is pushed up from the −Z direction to the +Z direction when discharging the material 14 from the container body 16. When the cone valve 23 is pushed up, the discharge port 22 that has been closed by the cone valve 23 opens, and the material 14 in the container body 16 is discharged.

[0022] 3 and 4 are perspective views showing the configuration of the chopper 24 attached to the lid 20, FIG. 5 is a front view showing the configuration of the chopper 24, and FIG. 6 is a plan view showing the configuration of the chopper 24. The chopper 24 is a device for micro-mixing the material 14 contained in the container 6 (container body 16) by crushing lumps of the material 14. The chopper 24 includes a motor 26 (see FIGS. 2 and 7, not shown in FIGS. 3 to 6), a rotating shaft 28, three first rotating blades 30a, 30b, and 30c, and a second rotating blade 32. As shown in FIG. 2, the motor 26 is disposed outside the container 6 and drives the rotating shaft 28 to rotate in the direction of arrow R2 shown in FIGS. 2 and 6. As shown in FIG. 2, the rotating shaft 28 is disposed inside the container 6 and attached to the container 6 (lid 20). The rotating shaft 28 extends in a direction (Z direction) perpendicular to the inner wall surface 33 (the back surface of the lid 20, a surface parallel to the XY plane) around the rotating shaft attachment position of the container 6. The rotating shaft 28 is driven by the motor 26 to rotate at a peripheral speed of 6.5 to 32.7 m / s (500 to 2500 rpm).

[0023] The first rotating blades 30a to 30c are fixed to the rotary shaft 28. As shown in FIG. 6, the first rotating blade 30a has a point-symmetric shape with respect to the rotary shaft 28 as the center, and is located on the opposite side of a line segment L extending in the radial direction of the rotary shaft 28, i.e., a line segment L connecting the tip T of the first rotating blade 30a and the center C of the rotary shaft 28, which is different from the rotation direction R2 of the rotary shaft 28. The first rotating blade 30a has a surface on the inner wall surface 33 side that is inclined relative to a plane (XY plane) perpendicular to the rotary shaft 28 (Z axis) so that the rear side in the rotation direction R2 of the rotary shaft 28 approaches the inner wall surface 33 (in this embodiment, the back surface of the lid 20; hereinafter simply referred to as the inner wall surface 33) around the rotary shaft attachment position of the container 6 from the front side in the rotation direction R2 of the rotary shaft 28, and has two extrusion surfaces 34a and 35a that extrude the material 14 toward the inner wall surface 33 when the rotary shaft 28 is rotated. The extrusion surfaces 34a and 35a are the entire surfaces of the first rotating blade 30a on the inner wall surface 33 side, and the inclination of the extrusion surfaces 34a and 35a decreases from the rotation shaft 28 side of the first rotating blade 30a toward the tip T. As shown in FIG. 5, the first rotating blade 30a has a curved shape that is concave and twisted toward the inner wall surface 33. That is, each of the extrusion surfaces 34a and 35a is a curved surface that is concave toward the inner wall surface 33. Therefore, the material 14 that comes into contact with the extrusion surfaces 34a and 35a, particularly the surfaces of the extrusion surfaces 34a and 35a from the rotation shaft 28 side to the center, is not ejected to the outside of the chopper 24 but is directed toward the inner wall surface 33.

[0024] The first rotating blade 30a has two rolling-in portions 36a and 37a, which are front edge portions in the direction of rotation R2 of the rotating shaft 28 and have an angle θ from the tip T of the first rotating blade 30a toward the opposite side from the direction of rotation of the rotating shaft 28 with respect to the line segment L. The rolling-in portions 36a and 37a roll in the material 14 toward the rotating shaft 28 when the rotating shaft 28 is rotated. The rolling-in portions 36a and 37a are curved toward the opposite side from the direction of rotation of the rotating shaft 28 and form the entire front edge portion of the first rotating blade 30a in the direction of rotation R2. Therefore, the material 14 that comes into contact with the rolling-in portions 36a and 37a, particularly the front edge portions in the direction of rotation R2 from the tip T to the center of the rolling portions 36a and 37a, is not repelled outside the chopper 24, but rather moves toward the inner wall surface 33 and toward the inside of the chopper 24, i.e., the rotating shaft 28.

[0025] That is, the material 14 that comes into contact with the first rotating blade 30a is pushed toward the inner wall surface 33 and toward the inside of the chopper 24, i.e., toward the rotating shaft 28, due to the effects of gravity and the like, as well as the effects of the extrusion surfaces 34a and 35a and the wrapping portions 36a and 37a.

[0026] Furthermore, the first rotating blade 30a has striking surfaces 38a and 39a at both tip ends T that strike the material 14 when the rotary shaft 28 is rotated. The striking surfaces 38a and 39a are surfaces that intersect with the rotation direction R2 of the rotary shaft 28 and are surfaces that are exposed toward the rotation direction R2 of the rotary shaft 28. The striking surfaces 38a and 39a strike the material 14 at a surface angle that is closer to perpendicular to the material 14, effectively breaking down clumps of the material 14 that strike the striking surfaces 38a and 39a.

[0027] The configuration of the first rotating vanes 30b and 30c is the same as that of the first rotating vane 30a. That is, the first rotating vane 30b has two extrusion surfaces 34b and 35b that have the same configuration as the extrusion surfaces 34a and 35a of the first rotating vane 30a, two roll-up portions 36b and 37b that have the same configuration as the roll-up portions 36a and 37a of the first rotating vane 30a, and two striking surfaces 38b and 39b that have the same configuration as the striking surfaces 38a and 39a of the first rotating vane 30a. Similarly, the first rotating blade 30c has two extrusion surfaces 34c and 35c having the same configuration as the extrusion surfaces 34a and 35a of the first rotating blade 30a, two winding portions 36c and 37c having the same configuration as the winding portions 36a and 37a of the first rotating blade 30a, and two impact surfaces 38c and 39c having the same configuration as the impact surfaces 38a and 39a of the first rotating blade 30a.

[0028] The second rotating blade 32 is fixed to the rotating shaft 28. The second rotating blade 32 has a point-symmetrical shape with respect to the rotating shaft 28, and is disposed between the rotating shaft mounting position of the container 6 (container body 16) and the first rotating blade 30c. Furthermore, the second rotating blade 32 does not have surfaces corresponding to the extrusion surfaces 34a-34c and 35a-35c of the first rotating blades 30a-30c, i.e., surfaces that extrude the material 14 toward the inner wall surface 33 when the rotating shaft 28 is rotated.

[0029] 2, i.e., when the inlet 18 is positioned vertically upward (+Z direction) and the outlet 22 is positioned vertically downward (-Z direction) (hereinafter, this position will be referred to as the normal position), the first rotary blades 30a-30c and the second rotary blade 32, which rotate together with the rotary shaft 28, do not come into contact with the material 14, and the material 14 is not mixed. However, when the container 6 rotates around the rotary shaft 12 of the container blender 4, for example, to a position shown in FIG. 7, i.e., when the inlet 18 is positioned vertically downward (-Z direction) and the outlet 22 is positioned vertically upward (+Z direction) (hereinafter, this position will be referred to as the inverted position), and the first rotary blades 30a-30c and the second rotary blade 32, which rotate together with the rotary shaft 28, come into contact with the material 14, the material 14 is disintegrated and mixed by the rotating first rotary blades 30a-30c and second rotary blade 32.

[0030] As shown in Figure 8(A), materials mixed by the rotating blades of a conventional chopper 124 that does not have an extrusion surface, a roll-up portion, or an impact surface only flow in a direction that spreads radially around the rotation axis of the chopper 124 (arrow A1 in Figure 8(A)), leaving a cavity between the rotating blades, and materials that are far from the rotating blades remain stationary. Therefore, the materials that come into contact with the rotating blades are limited to the materials closest to the rotating blades, making it difficult to crush and mix accurately. In contrast, in the chopper 24 according to this embodiment, as shown in Fig. 8(B), the material 14 mixed by the first rotating vanes 30a-30c not only flows radially around the rotation shaft 28 of the chopper 24 (arrow A2 in Fig. 8(B)), but also flows toward the rotation shaft 28 due to the action of the extrusion surfaces 34a-34c and 35a-35c and the rolling-up portions 36a-36c and 37a-37c, and also flows toward the inner wall surface 33 around the rotation shaft attachment position of the container 6. As a result, the material 14 flows toward the inner wall surface 33 (+Z direction, arrow A3 in Fig. 8(B)), and therefore the frequency of contact with the first rotating vanes 30a-30c and the second rotating vane 32 increases compared to conventional rotating vanes. Furthermore, the first rotary vanes 30a to 30c also have striking surfaces 38a to 38c and 39a to 39c, so that they effectively strike the material 14 and effectively break up clumps of the material 14.

[0031] The material 14 that flows in the direction of arrow A3 and reaches the second rotating blade 32 does not flow in the direction of arrow A3, but rather in the direction of arrow A2, because the second rotating blade 32 does not have a surface corresponding to the extrusion surface or the entrainment portion. This allows the material 14 to be efficiently pulverized by the second rotating blade 32. This also prevents the material 14 from getting into and clogging the gap between the second rotating blade 32 and the inner wall surface 33 around the rotary shaft attachment position of the container 6.

[0032] Next, a mixing method for mixing materials 14 put into a container 6 by rotating the container 6 using the container rotary mixer 2 according to this embodiment will be described.

[0033] First, materials 14, which are multiple types of powdered or granular materials to be mixed, are placed in a container 6. The container 6 containing the materials 14 is transported to the container blender 4 and fixed to the assembly 10 of the container blender 4. Then, a control unit (not shown) that comprehensively controls each part of the container rotary mixer 2 drives a rotary motor (not shown) of the container blender 4 to rotate the rotary shaft 12, thereby rotating the assembly 10 attached to the rotary shaft 12 and the container 6 fixed to the assembly 10, thereby macro-mixing the materials 14. The control unit rotates the rotary shaft 12 and also drives a motor 26 to rotate the rotary shaft 28, thereby rotating first rotary vanes 30a-30c and second rotary vane 32 attached to the rotary shaft 28.

[0034] While the rotating shaft 12 of the container blender 4 rotates from the normal position to the reverse position, the amount of material 14 that comes into contact with the first rotating blades 30a-30c and the second rotating blade 32 gradually increases. Then, the material 14 that hits the extrusion surfaces 34a-34c and 35a-35c and the entrainment portions 36a-36c and 37a-37c of the first rotating blades 30a-30c is pushed out toward the inner wall surface 33 and entrained toward the rotating shaft 28. In addition, the material 14 hits the striking surfaces 38a-38c and 39a-39c of the first rotating blades 30a-30c and is struck. The material 14 is also pushed and caught between the first rotating vanes 30a and 30b and between the first rotating vanes 30b and 30c, and the material 14 that reaches the second rotating vane 32 is repelled to the outside of the chopper 24 by the shear force of the rotating second rotating vane 32. That is, the action of the extrusion surfaces 34a to 34c and 35a to 35c, the entrainment portions 36a to 36c and 37a to 37c, and the striking surfaces 38a to 38c and 39a to 39c of the first rotating vanes 30a to 30c increases the number of times and amount of the material 14 that comes into contact with the first rotating vanes 30a to 30c and the second rotating vane 32, and the material 14 is pulverized and micro-mixed with high efficiency and precision.

[0035] The container 6 containing the pulverized material 14 is transported to a discharge station where the material discharge process, which is the next process in the mixture production line, is carried out.

[0036] According to the container rotary mixer 2 and the method for mixing materials 14 using the same according to this embodiment, since the mixer is equipped with a chopper 24, the materials 14 put into the container 6 can be crushed and mixed with high precision and efficiency.

[0037] In the above embodiment, an example was given in which the container 6 has an inlet 18 for adding the material 14 and a lid 20 for closing the inlet 18, and the chopper 24 is attached to the lid 20, but the chopper 24 may be attached to any part of the container 6 (container body 16) other than the lid 20.

[0038] Furthermore, although the above-described embodiment includes three first rotating blades 30a-30c, one, two, or four or more first rotating blades may be provided. Furthermore, although the above-described embodiment includes one second rotating blade 32, two or more second rotating blades may be provided. The number of first rotating blades is determined by factors such as the motor load and the length of the rotating shaft. Furthermore, although the above-described embodiment includes second rotating blade 32 having a shape different from the shapes of first rotating blades 30a-30c, second rotating blades having the same shape as the first rotating blade may be provided.

[0039] Furthermore, in the above-described embodiment, multiple types of powdered or granular materials 14 are added to and mixed in container 6 before rotating container 6, but the powdered or granular materials to be mixed may be added while container 6 is rotating. Furthermore, in the above-described embodiment, multiple types of powdered or granular materials are mixed, but powdered or granular materials and liquid may be mixed. In this case, too, the liquid to be mixed may be added before or during rotation of container 6. [Example]

[0040] The material 14 was mixed using the container rotary mixer 2 according to the embodiment described above. (1) When the material 14 was mixed by attaching a conventional chopper 124 to the lid 20 instead of the chopper 24 according to the embodiment described above (Comparative Example), and (2) when the material 14 was mixed by attaching the chopper 24 according to the embodiment described above to the lid 20 (Example), the container 6 was rotated by rotating the rotating shaft 12 of the container blender 4, and the rotating blades were rotated at a peripheral speed of 26.1 m / s (rotation speed 2000 rpm) by rotating the rotating shaft of the chopper.

[0041] Note that, instead of the first rotating blades 30a to 30c, rotating blades having the same configuration as the second rotating blades 32 are attached to the rotating shaft of the conventional chopper 124. That is, four second rotating blades 32 are attached to the rotating shaft of the chopper 124. Also, the rotation angle of the rotating shaft 12 is defined as 0 degrees (360 degrees) when the container 6 is in the normal position, and as 180 degrees when the container 6 is in the reverse position.

[0042] FIG. 9 is a graph showing the current value of motor 26 from 41.2 seconds to 56.4 seconds after the start of rotation of container 6 (during four rotations of container 6). The dashed line graph in FIG. 9 shows the current value of motor 26 according to the comparative example, the solid line graph in FIG. 9 shows the current value of motor 26 according to the example, and the dashed-dotted line graph shows the rotation angle of container 6. The horizontal axis represents time, and the vertical axis represents the current value or rotation angle. According to the dashed line graph in FIG. 9 (comparative example), the current value of motor 26 peaks when the rotation angle of container 6 is approximately 180 degrees to 240 degrees, indicating that the conventional chopper 124 is under a heavy load. In other words, it can be seen that chopper 124 is doing a lot of work and is therefore in contact with the most material 14 when the rotation angle of container 6 is approximately 180 degrees to 240 degrees. 9 (Example), the current value of the motor 26 peaks when the rotation angle of the vessel 6 is between approximately 180 degrees and 240 degrees, and the peak current value in the Example is greater than the peak current value in the Comparative Example, indicating that the first rotating blades 30a to 30c and the second rotating blade 32 are subjected to a greater load. In other words, it can be seen that the chopper 24 is doing more work and is therefore in contact with the most material 14 when the rotation angle of the vessel 6 is between approximately 180 degrees and 240 degrees.

[0043] The integrated current of the motor 26 was calculated from 41.2 seconds to 56.4 seconds (during four rotations of the container 6). The integrated current was calculated by subtracting the no-load current value. The no-load current value was set to the minimum value of 6.3 A from the graph. The integrated current in the comparative example was 75.3 As, and the average integrated current per rotation was 18.8 As / r, while the integrated current in the example was 85.5 As, and the average integrated current per rotation was 21.4 As / r. That is, the integrated current value in the example was 1.14 times that of the comparative example, confirming that the chopper 24 in the example performed more work than the chopper 124 in the comparative example. That is, it was confirmed that the chopper 24 in the example came into contact with more material 14 than the chopper 124 in the comparative example, and was able to crush and mix more material 14. [Explanation of symbols]

[0044] 2...container rotary mixer, 4...container blender, 6...intermediate bulk container, 8...box, 10...assembly, 12...rotating shaft, 14...material, 16...container body, 18...inlet, 20...lid, 22...outlet, 23...cone valve, 24...chopper, 26...motor, 28...rotating shaft, 30a-30c...first rotating blade, 32...second rotating blade, 33...inner wall surface, 34a-34c, 35a-35c...pressing surface, 36a-36c, 37a-37c...winding portion, 38a-38c, 39a-39c...impact surface.

Claims

1. A container rotary mixer that mixes materials introduced into a container by rotating the container, a chopper attached to the vessel; The chopper is a rotating shaft disposed within the container and attached to the container; a motor disposed outside the container and configured to rotate the rotary shaft; a first rotary blade fixed to the rotary shaft, having a point-symmetric shape with respect to the rotary shaft as a center, and positioned on an opposite side of a line segment extending in a radial direction of the rotary shaft, the opposite side being different from the rotation direction of the rotary shaft; a second rotating blade fixed to the rotating shaft, having a point-symmetric shape with respect to the rotating shaft, and disposed between the container and the first rotating blade; the first rotating blade has an extrusion surface on the inner wall surface side that is inclined so that the rear side in the rotation direction of the rotating shaft approaches the inner wall surface around the rotating shaft mounting position of the container from the front side in the rotation direction of the rotating shaft, and extrudes the material toward the inner wall surface when the rotating shaft is rotated.

2. 2. The container rotary mixer according to claim 1, wherein the first rotating blade has a winding portion which is an edge portion on the front side of the rotation direction of the rotating shaft that is angled from the tip of the first rotating blade toward a direction opposite to the rotation direction of the rotating shaft with respect to a line segment extending in the radial direction of the rotating shaft, and which winds up the material in a direction toward the rotating shaft when the rotating shaft is rotated.

3. 3. The container rotary mixer according to claim 1, wherein the first rotary blade has, at a tip thereof, a striking surface that is exposed toward the rotation direction of the rotary shaft and strikes the material when the rotary shaft is rotated.

4. 4. The container rotary mixer according to claim 1, wherein the first rotary blade has a curved shape that is recessed toward an inner wall surface around a rotary shaft mounting position of the container.

5. The container rotary mixer according to any one of claims 1 to 4, wherein the second rotary blade does not have a surface that pushes the material toward an inner wall surface around the rotary shaft mounting position of the container when the rotary shaft is rotated.

6. The rotation axis extends in a direction perpendicular to an inner wall surface of the container around the rotation axis mounting position. The container rotary mixer according to any one of claims 1 to 5.

7. The container rotary mixer according to any one of claims 1 to 6, wherein the container is independently transportable.

8. The container has an inlet for introducing the material and a lid for closing the inlet, The container rotary mixer according to any one of claims 1 to 7, wherein the chopper is attached to the lid.

9. A mixing method using the container rotary mixer according to any one of claims 1 to 8, in which materials introduced into the container are mixed by rotating the container, a step of adding the material to the container; a first mixing step of mixing the materials by rotating the container; a second mixing step of rotating the rotary shaft to extrude the material that contacts the extrusion surface of the first rotary blade toward an inner wall surface around an attachment position of the rotary shaft of the container, and pulverizing and mixing the material that contacts the first rotary blade and the second rotary blade; Mixing methods including:

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