Mixing machine
The kneader design with an orbital shaft and annular side walls addresses yield loss by containing the processing area, enhancing efficiency and reducing contamination, suitable for both small and large material quantities.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SINTOKOGIO LTD
- Filing Date
- 2022-10-11
- Publication Date
- 2026-07-22
AI Technical Summary
Existing kneaders face a decrease in yield when processing small amounts of material due to material adhesion to mechanical structures, leading to inefficiencies and contamination.
A kneader design featuring an orbital shaft, a maller wheel, and annular side walls that surround the orbital shaft, preventing material adhesion and enhancing yield by containing the processing area, with detachable side walls for flexibility in handling different quantities.
Improves yield and processing efficiency for small amounts of material while maintaining mechanical strength, reduces contamination, and allows efficient handling of both small and large quantities without compromising mixing quality.
Smart Images
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Abstract
Description
Technical Field
[0001] The present disclosure relates to a kneader.
Background Art
[0002] There are known kneaders called muller type or wheel type (see, for example, Patent Document 1 or Non-Patent Document 1). This kneader mixes and kneads a material containing one or more kinds of powders while partially pulverizing or compounding the material. The material may contain a liquid such as a binder as an additive. In this kneader, a composite external force is applied to the material by kneading (compressive force), smearing (shearing force), and spatulating (spatula rubbing force), which are called the three elements of marring. Thereby, while crushing the aggregates of particles, other particles or a liquid such as a binder can be uniformly adhered (coated) to the particle surface. This kneader is used in a wide range of fields such as foundry sand, refractories, ferrite, building materials, ceramic raw materials, synthetic resins, abrasives, iron ore, chemical fertilizers, ceramics, battery paste, steelmaking raw materials, carbon compounds, etc. [[ID=!13]]
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Non-Patent Documents
[0004]
Non-Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] In the aforementioned mixing machine, complex mechanical structures are installed inside the mixing tank that processes the materials. Especially when processing small amounts of material, if the material adheres to the mechanical structures, a decrease in yield (recovery rate) becomes a problem.
[0006] This disclosure aims to provide a kneader capable of improving yield when processing small amounts of material. [Means for solving the problem]
[0007] A kneader according to one aspect of the present disclosure comprises a kneading tank having a bottom and sides, an orbital shaft protruding into the kneading tank from the bottom, a maller wheel disposed in the kneading tank and rotating on the bottom so as to rotate around the orbital shaft, and an annular first side wall provided on the bottom so as to surround the orbital shaft, inside the orbital trajectory of the maller wheel when viewed from the axial direction of the orbital shaft. [Effects of the Invention]
[0008] This disclosure provides a kneader capable of improving yield when processing small amounts of material. [Brief explanation of the drawing]
[0009] [Figure 1] Figure 1 is a plan view showing a kneader according to an embodiment. [Figure 2] Figure 2 is a side view showing the kneader shown in Figure 1. [Figure 3] Figure 3 is a cross-sectional view of a part of the kneader shown in Figure 1, along the line III-III. [Figure 4] Figure 4 is a cross-sectional view of a part of the kneader shown in Figure 1, along the line IV-IV. [Figure 5] Figure 5 is a cross-sectional view of the mixing tank and its side wall. [Modes for carrying out the invention]
[0010] [Summary of the embodiments of this disclosure] First, an overview of the embodiments of this disclosure will be provided.
[0011] (Clause 1) A kneader according to one aspect of the present disclosure comprises a kneading tank having a bottom and sides; an orbital shaft protruding into the kneading tank from the bottom; a maller wheel disposed in the kneading tank and rotating on the bottom so as to rotate around the orbital shaft; and an annular first side wall provided on the bottom so as to surround the orbital shaft, inside the orbital trajectory of the maller wheel when viewed in the axial direction of the orbital shaft.
[0012] In the above-described kneader, the first side wall is provided so as to surround the orbital axis, which suppresses material adhesion to the mechanical structure including the orbital axis. Therefore, the yield can be improved when processing small amounts of material.
[0013] (Clause 2) In the kneader described in Clause 1 above, the first side wall may be detachably attached to the bottom. In this case, by removing the first side wall, the processing area for processing the material can be expanded, so that even large quantities of material can be processed efficiently.
[0014] (Clause 3) In the kneader described in Clause 1 or 2 above, an annular groove may be provided at the bottom on the outside of the first side wall, surrounding the orbital axis. In this case, the groove increases the depth of the processing area, which can suppress the scattering of material outside the processing area and the mixing of foreign matter into the processing area.
[0015] (Clause 4) In the kneader described in any one of the above Clauses 1 to 3, the kneader may further include an annular second side wall provided on the bottom so as to surround the orbital path when viewed from the axial direction, on the inside of the side. In this case, since the second side wall is provided on the inside of the side, the processing area can be limited. Therefore, small amounts of material can be processed efficiently.
[0016] (Clause 5) In the kneader described in Clause 4 above, the second side wall may be detachably attached to the bottom. In this case, the processing area can be expanded by removing the second side wall, so that even large amounts of material can be processed efficiently.
[0017] (Clause 6) In the kneader described in Clause 4 or 5 above, an annular groove may be provided at the bottom, outside the first side wall and inside the second side wall, so as to surround the revolving shaft. In this case, since the depth of the processing area is increased by the groove, it is possible to suppress the scattering of the material outside the processing area and the mixing of foreign substances into the processing area.
[0018] (Clause 7) In the kneader described in Clause 6 above, the groove may have a first side surface continuous from the surface of the first side wall facing the second side wall, a second side surface continuous from the surface of the second side wall facing the first side wall, and a bottom surface connecting the first side surface and the second side surface. In this case, since the depth of the processing area is surely increased by the groove, it is possible to surely suppress the scattering of the material outside the processing area and the mixing of foreign substances into the processing area.
[0019] (Clause 8) In the kneader described in Clause 7 above, the first side surface and the second side surface may each include a curved surface portion connected to the bottom surface. In this case, the entry of the material into the corner portions in the groove is suppressed. Therefore, the yield when processing a small amount of material can be further improved.
[0020] (Clause 9) In the kneader described in any one of Clauses 4 to 8 above, the height of the second side wall may be higher than the height of the first side wall. The material is likely to scatter outward due to centrifugal force. By increasing the height of the second side wall, it is possible to effectively suppress the scattering of the material outside the processing area.
[0021] (Clause 10) In the kneader described in any one of Clauses 1 to 9 above, the bottom has a main body connected to the side portion, and a bottom plate member provided on the main body and detachably attached to the main body. The first side wall may be attached to the bottom plate member. In this case, the first side wall can be attached to the kneading tank together with the bottom plate member.
[0022] (Clause 11) In the kneader described in any one of Clauses 3, 6 to 8 above, the bottom has a main body connected to the sides and a bottom plate provided on the main body and detachably attached to the main body, and the groove may be provided in the bottom plate. In this case, the groove together with the bottom plate can be attached to the kneading tank.
[0023] [Examples of embodiments of this disclosure] Embodiments of the present invention will be described in detail below with reference to the attached drawings. In this description, the same reference numerals will be used for the same element or element having the same function, and redundant explanations will be omitted.
[0024] Referring to Figures 1 to 5, a kneader 1 according to an embodiment will be described. The kneader 1 is a maller-type or wheel-type kneader that mixes and kneads the material to be processed. The kneader 1 comprises a trolley 2, a drive unit 3, a kneading tank 4, a revolving shaft 5 (rotating drive shaft), a pair of rotating shafts 6, a pair of maller wheels 7, a support member 8, a funnel 9, a pair of pressing mechanisms 10, a first side wall 11, a second side wall 12, a first blower 13, a second blower 14, a first side wall scraper 15, a second side wall scraper 16, and a pair of maller scrapers 17.
[0025] In the diagram, the X and Y directions are horizontal, and the Z direction is vertical. The X, Y, and Z directions are mutually orthogonal axis directions in a three-dimensional Cartesian coordinate system. Note that in Figures 3 and 4, only the mixing tank 4, the first side wall 11, and the second side wall 12 are shown in cross-sectional views, while the other components are shown in side views.
[0026] The trolley 2 has four legs that extend vertically. Wheels are provided at the lower end of each leg. The trolley 2 has a mounting surface 2a on which the kneading tank 4 is placed. The drive unit 3 is located on the trolley 2. The drive unit 3 is located below the mounting surface 2a. The kneading tank 4 is placed on the mounting surface 2a. The kneading tank 4 has a bottom portion 21 and side portions 22 that form the internal space S of the kneading tank 4, and an insertion portion 23 through which the orbital shaft 5 is inserted.
[0027] The bottom portion 21 has a main body 24 connected to the side portion 22, and a bottom plate material 25 provided on the main body 24 and detachably attached to the main body 24. Both the main body 24 and the bottom plate material 25 are plate-shaped, specifically disc-shaped, and have the same outer diameter. The main body 24 and the bottom plate material 25 are stacked on top of each other so as to be in surface contact. In other words, the bottom portion 21 has a double or two-layer structure. The bottom portion 21 as a whole is plate-shaped, specifically disc-shaped. The main body 24 and the bottom plate material 25 are fixed to each other, for example, by bolts (not shown).
[0028] The bottom portion 21 is provided with an annular groove 26, specifically a circular groove, surrounding the orbital axis 5. Viewed from the Z-axis direction, the groove 26 is spaced apart from the side portion 22 and the orbital axis 5. Viewed from the Z-axis direction, the groove 26 is located outside the first side wall 11 and inside the second side wall 12. The groove 26 is provided concentrically with the inner and outer trajectories of the Muller wheel 7 as viewed from the Z-axis direction. The orbital trajectory (orbital path) of the Muller wheel 7 as viewed from the Z-axis direction has a predetermined width, with the inner trajectory being the inner edge of the orbital trajectory and the outer trajectory being the outer edge of the orbital trajectory.
[0029] In this embodiment, the groove 26 is provided in the bottom plate material 25 by carving. The groove 26 is provided in the bottom plate material 25 so as not to come into contact with the muller wheel 7. The groove 26 has a width that completely accommodates the width dimension of the muller wheel 7. The groove 26 is configured so as not to come into contact with the inner and outer raceways of the muller wheel 7 when viewed from the Z-axis direction. The depth of the groove 26 from the upper surface 25a of the bottom plate material 25 is, for example, 3 mm to 50 mm, and more preferably 5 mm to 10 mm.
[0030] As shown in Figure 5, the groove 26 has a first side surface 26a, a second side surface 26b, and a bottom surface 26c. The first side surface 26a connects the top surface 25a to the inner edge of the bottom surface 26c. The second side surface 26b connects the top surface 25a to the outer edge of the bottom surface 26c. The first side surface 26a and the second side surface 26b each include a curved portion 26d that connects to the bottom surface 26c. The bottom surface 26c connects the first side surface 26a and the second side surface 26b.
[0031] The side portion 22 is cylindrical, specifically cylindrical. The outer edge of the main body 24 is connected to the lower end of the side portion 22. In this embodiment, the outer edge of the main body 24 is connected at a position spaced apart from the lower end of the side portion 22. That is, the side portion 22 includes a portion 22a that protrudes from the main body 24 toward the mounting surface 2a. As a result, the main body 24 is held in a state of being suspended above the mounting surface 2a. A through hole 24a, to which the insertion portion 23 is connected, is provided in the central part of the main body 24. A through hole 25b having a larger diameter than the through hole 24a is provided in the central part of the bottom plate material 25.
[0032] The inner diameter of the side portion 22 is, for example, 610 mm. The height of the side portion 22 (height of the side portion 22 from the top surface 25a) is, for example, 172 mm or more and 219 mm or less. The insertion portion 23 is connected to the through hole 24a. The insertion portion 23 has an inner diameter through which the orbital axis 5 can be inserted. The insertion portion 23 protrudes from the main body 24 toward the mounting surface 2a. The lengths of the insertion portion 23 and the side portion 22 protruding from the main body 24 toward the mounting surface 2a are equal to each other. The lower end of the insertion portion 23 is in contact with the mounting surface 2a. The insertion portion 23, together with the side portion 22, supports the main body 24.
[0033] The orbital shaft 5 is inserted through the insertion section 23 and protrudes into the mixing tank 4 from the center of the bottom section 21. The axial direction of the orbital shaft 5 coincides with the Z-axis direction. The orbital shaft 5 is positioned perpendicular to the bottom section 21. The orbital shaft 5 passes through the center of the bottom section 21 and is connected to the drive unit 3. The orbital shaft 5 is rotated by the drive unit 3. A pair of rotational shafts 6 are attached to the orbital shaft 5. The pair of rotational shafts 6 are positioned perpendicular to the orbital shaft 5 and parallel to the bottom section 21. The pair of rotational shafts 6 face each other with the orbital shaft 5 in between. The pair of rotational shafts 6 are offset from each other so as not to be coaxial. In the state shown in Figure 1, the axial direction of the rotational shafts 6 coincides with the X-axis direction.
[0034] A pair of maller wheels 7 are arranged inside the mixing tank 4. Each maller wheel 7 is rotatably mounted to the end of its corresponding rotation axis 6. The pair of maller wheels 7 are positioned opposite each other via a revolving axis 5. When material is introduced into the mixing tank 4 and the revolving axis 5 is rotated by the drive unit 3, the rotation axis 6 rotates (revolves) around the revolving axis 5. As a result, the maller wheels 7 rotate (revolve) around the revolving axis 5 while being held rotatably (rotating) around the rotation axis 6 on the bottom 21.
[0035] The support member 8 extends perpendicular to the orbital axis 5 and parallel to the bottom 21. In the state shown in Figure 1, the longitudinal direction of the support member 8 coincides with the Y-axis direction. The central part of the support member 8 in the longitudinal direction is fixed to the upper end of the orbital axis 5. The funnel 9 is used to add a predetermined chemical solution to the mixing tank 4. The funnel 9 is fixed above the orbital axis 5. The funnel 9 is fixed to the central part of the support member 8 in the longitudinal direction.
[0036] Each pressing mechanism 10 is provided between the corresponding rotation axis 6 and the support member 8. A pair of pressing mechanisms 10 are arranged symmetrically around the orbital axis 5. Each pressing mechanism 10 includes a link member and a coil spring, etc., and moves the corresponding rotation axis 6 in the Z-axis direction. This causes the Muller wheel 7 to move in the Z-axis direction, applying a pressing force to the material placed on the bottom 21. The configuration of the pressing mechanism 10 is the same as in Patent Document 1, so a detailed explanation is omitted.
[0037] As shown in Figure 5, the first side wall 11 functions as a cover that extends the first side surface 26a of the groove 26. As shown in Figure 5, the second side wall 12 functions as a cover that extends the second side surface 26b of the groove 26. Together with the groove 26, the first side wall 11 and the second side wall 12 define a processing area R in which the material is mixed and kneaded. The processing area R is a part of the internal space S of the kneading tank 4. A pair of mallet wheels 7 are placed in the processing area R. The first side wall 11 and the second side wall 12 prevent the material from scattering outside the processing area R and prevent foreign matter from entering the material inside the processing area R.
[0038] The first side wall 11 is annular or cylindrical and is provided on the bottom 21. The first side wall 11 is located inside the orbital path of the Muller wheel 7 when viewed from the axial direction of the orbital axis 5. The gap (clearance) between the first side wall 11 and the inner path of the Muller wheel 7 is, for example, 3 mm to 10 mm, and in this embodiment, it is about 5 mm. The first side wall 11 is located outside the orbital axis 5 so as to surround the orbital axis 5. The first side wall 11 is spaced apart from the orbital axis 5.
[0039] The first side wall 11 has an L-shaped cross-section and includes a side portion 31 and a mounting portion 32. The side portion 31 and the mounting portion 32 are integrally formed, for example, by welding. The side portion 31 is annular or cylindrical, specifically an annular or cylindrical shape. The side portion 31 extends in the Z-axis direction and is provided perpendicular to the bottom portion 21. The height of the side portion 31 (height of the side portion 31 from the top surface 25a) is set to a height that prevents material from scattering. The height of the side portion 31 is, for example, 30 mm or more. The upper limit of the height of the side portion 31 is a height that does not interfere with the axis of rotation 6. The height of the side portion 31 is lower than the height of the side portion 22. The side portion 31 has an opposing surface 31a that faces the second side wall 12. The first side wall 11 is positioned in accordance with the position of the groove portion 26 such that the first side surface 26a of the groove portion 26 is continuous with the opposing surface 31a.
[0040] The mounting portion 32 is provided in a flange-like manner at the lower end of the side portion 31. The mounting portion 32 extends from the lower end of the side portion 31 toward the orbital axis 5 and is in surface contact with the bottom portion 21. The mounting portion 32 is attached to the bottom portion 21 by, for example, a bolt 33. In this way, the first side wall 11 is detachably attached to the bottom portion 21. In this embodiment, the mounting portion 32 is attached to the bottom plate material 25. The mounting portion 32 may also be liquid-tightly attached to the bottom plate material 25 by, for example, an O-ring (not shown).
[0041] The second side wall 12 is annular or cylindrical and is provided on the bottom portion 21. The second side wall 12 is located inside the side portion 22. When viewed from the axial direction of the orbital axis 5, the second side wall 12 is located outside the orbital axis 5, the first side wall 11, and the orbital trajectory of the Muller wheel 7. The gap (clearance) between the second side wall 12 and the outer trajectory of the Muller wheel 7 is, for example, 3 mm to 10 mm, and in this embodiment, it is about 5 mm. The second side wall 12 is spaced apart from the side portion 22.
[0042] The second side wall 12 has an L-shaped cross-section and includes a side portion 34 and a mounting portion 35. The side portion 34 and the mounting portion 35 are integrally formed, for example, by welding. The side portion 34 is annular or cylindrical, specifically an annular or cylindrical shape. The side portion 34 extends in the Z-axis direction and is provided perpendicular to the bottom portion 21. The height of the side portion 34 (height of the side portion 34 from the top surface 25a) is set to a height that prevents material from scattering. In this embodiment, the height of the side portion 34 is the same as the height of the side portion 31, for example, 30 mm or more. The side portion 34 has an opposing surface 34a that faces the first side wall 11. The second side wall 12 is positioned in accordance with the position of the groove portion 26 such that the second side surface 26b of the groove portion 26 is continuous with the opposing surface 34a.
[0043] The mounting portion 35 is provided in a flange-like manner at the lower end of the side portion 34. The mounting portion 35 extends from the lower end of the side portion 34 toward the side portion 22 and is in surface contact with the bottom portion 21. The mounting portion 35 is attached to the bottom portion 21, for example, by bolts 36. In this way, the second side wall 12 is detachably attached to the bottom portion 21. In this embodiment, the mounting portion 35 is attached to the bottom plate material 25. The mounting portion 35 may also be liquid-tightly attached to the bottom plate material 25, for example, via an O-ring (not shown).
[0044] The first plow 13 and the second plow 14 are pressed down on the bottom surface 26c by the maller wheel 7, peeling the solidified and adhered material from the bottom surface 26c, breaking it into small pieces, and redistributing it within the processing area R. The first plow 13 is configured to peel off material adhering to the inner portion of the bottom surface 26c. The second plow 14 is configured to peel off material adhering to the outer portion of the bottom surface 26c. The first plow 13 and the second plow 14 are attached to different ends of the support member 8 via arms. As the orbital axis 5 rotates, the first plow 13 and the second plow 14 rotate together with the support member 8, peeling off the material.
[0045] The first sidewall scraper 15 is configured to scrape off material adhering to the opposing surface 31a. The second sidewall scraper 16 is configured to scrape off material adhering to the opposing surface 34a. The first sidewall scraper 15 and the second sidewall scraper 16 are attached to different ends of the support member 8 via arms. In this embodiment, the first probe 13 and the second sidewall scraper 16 are attached to one end of the support member 8. The second probe 14 and the first sidewall scraper 15 are attached to the other end of the support member 8. The first sidewall scraper 15 and the second sidewall scraper 16 scrape off material while rotating together with the support member 8 as the orbital axis 5 rotates.
[0046] Each marler scraper 17 is configured to scrape off material adhering to the outer surface of the corresponding marler wheel 7. Each marler scraper 17 is fixed to a bearing of the rotation axis 6 connected to the corresponding marler wheel 7. As the marler wheel 7 rotates around the rotation axis 6, material adhering to the outer surface of the marler wheel 7 is scraped off by the marler scraper 17.
[0047] As explained above, in the kneader 1, the first side wall 11 is provided on the bottom 21 of the kneading tank 4 so as to surround the orbital axis 5. Therefore, material adhesion to the mechanical structure, including the orbital axis 5 located in the center of the kneading tank 4, is suppressed. Thus, the yield can be improved when processing small amounts of material.
[0048] Mixer 1 is particularly effective in the early stages of development when it is necessary to process small amounts of material, especially when processing expensive or hard-to-obtain materials. While simply miniaturizing the mixer is an option, miniaturizing a muller-type mixer reduces mechanical strength, leading to a decrease in mixing power, kneading power, and compounding function. Mixer 1 allows for the processing of small amounts of material with a high yield without reducing mechanical strength. Since the basic kneading capacity of the machine (compression and shear force of the muller wheel 7) does not change significantly, the quality of the mixture is less affected even with small amounts of material.
[0049] The first side wall 11 prevents foreign matter such as lubricating oil from entering the processing area R from the mechanical structure, thus preventing contamination. Although conventional kneaders also adequately prevent foreign matter from entering from the mechanical structure, the first side wall 11 physically separates the mechanical structure from the processing area R, making it easier to prevent contamination.
[0050] The first side wall 11 limits the processing area R in which the material can flow. This reduces the volume of the processing area R, thus reducing the amount of material required for processing. A practical example of a small-scale maller-type mixer is the MSG-0L manufactured by Shinto Kogyo. In this mixer, the outer diameter of the processing volume section, which corresponds to the internal space of the mixing tank, is 610 mm, and the inner diameter is 83 mm. To effectively process the material in this processing volume section, empirically, the minimum amount of material piled up must be 20 mm to 30 mm (approximately 6 L to 9 L in volume). This is because, in conventional mixers, uneven distribution of the material away from the maller wheel is unavoidable. While the uneven distribution of the material can also be resolved by the stirring action of a scraper or blower, this is time-consuming.
[0051] In the kneader 1, by bringing the first side wall 11 and the second side wall 12, which define the width of the processing area R, closer to the orbit of the maller wheel 7, the uneven distribution of material within the processing area R can be significantly suppressed. As a result, effective mixing can be performed even with a material accumulation of approximately 0.5 mm to 20 mm (approximately 0.8 L to 3 L in volume). In the kneader 1, because the material remains within the processing area R without scattering in the mixing tank 4, not only is the amount of material required for processing reduced, but the number of times the maller wheel 7 applies compressive force to the material per unit time, and the number of times shear stress is applied to the material between the maller wheel 7 and the bottom plate material 25 per unit time can be increased. In other words, the frequency with which the maller wheel 7 applies mixing force, kneading force, and compounding force to the material can be increased. As a result, processing efficiency is improved and processing time is shortened.
[0052] In the kneader 1, the first side wall 11 and the second side wall 12 are detachable from the bottom 21. Therefore, by removing the first side wall 11 and the second side wall 12, the kneader 1 can also be used for normal applications of mixing and kneading large quantities of material. In this case, the entire area of the internal space S, excluding the orbital axis 5, constitutes the processing area. Each blower and scraper is appropriately configured to suit the processing area.
[0053] In the kneader 1, the grooves 26 increase the depth of the processing area R, thereby suppressing material scattering outside the processing area R and preventing foreign matter from entering the processing area R. The first side surface 26a and the second side surface 26b of the grooves 26 include a curved portion 26d that connects to the bottom surface 26c, thereby suppressing material from getting into the corners of the grooves 26. Therefore, the yield can be further improved when processing small amounts of material. In addition, the curved portion 26d improves ease of cleaning.
[0054] In the kneader 1, the bottom 21 has a main body 24 and a bottom plate material 25, and the first side wall 11 and the second side wall 12 are attached to the bottom plate material 25. Therefore, the kneader 1 can be easily constructed by attaching the bottom plate material 25 together with the first side wall 11 and the second side wall 12 to an existing kneader.
[0055] The present invention is not necessarily limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.
[0056] If the material to be treated has strict restrictions regarding contamination, the Muller wheel 7 and bottom plate 25 can be made of abrasion-resistant material. This suppresses the wear and contamination that occurs due to the compressive and shear forces generated between the Muller wheel 7 and the bottom plate 25. In this case, the abrasion-resistant material may be metal or ceramic. Alternatively, the surfaces of the Muller wheel 7 and bottom plate 25 may be heat-treated, or coated with abrasion-resistant material such as metal, ceramic, or DLC. If necessary, the surfaces of the first blower 13, second blower 14, first sidewall scraper 15, second sidewall scraper 16, and Muller scraper 17 may also be treated in the same way.
[0057] The height of the side portion 34 may be higher than the height of the side portion 31. Due to centrifugal force, material tends to scatter outwards more easily than inwards. By raising the height of the side portion 34, the scattering of material can be effectively suppressed. Since the side portion 34 cannot interfere with the rotation axis 6, the height of the side portion 34 can be set appropriately regardless of the height position of the rotation axis 6.
[0058] In the kneader 1, the number of maller wheels 7 is not limited to one or more. The kneader 1 is equipped with a first side wall 11 and a second side wall 12, but the second side wall 12 is not required. Even in this case, the first side wall 11 prevents material from adhering to the mechanical structure. The kneader 1 is not required to have grooves 26. [Explanation of symbols]
[0059] 1... Mixer, 4... Mixing tank, 5... Orbital shaft, 7... Muller wheel, 11... First side wall, 12... Second side wall, 21... Bottom, 22... Side, 25... Bottom plate material, 26... Groove, 26a... First side, 26b... Second side, 26c... Bottom, 31a... Opposing surface, 34a... Opposing surface.
Claims
1. A kneading tank having a bottom and sides, A rotational axis protruding from the bottom into the kneading tank, A maller wheel is placed inside the mixing tank and rotates on the bottom of the tank around the orbital axis so as to be able to rotate on its own, Viewed from the axial direction of the orbital axis, the Muller wheel has an annular first side wall provided on its bottom so as to surround the orbital axis, inside the orbital trajectory of the Muller wheel, The bottom portion is provided with an annular groove on the outside of the first side wall, surrounding the orbital axis. Mixing machine.
2. A kneading tank having a bottom and sides, A rotational axis protruding from the bottom into the kneading tank, A maller wheel is placed inside the mixing tank and rotates on the bottom of the tank around the orbital axis so as to be able to rotate on its own, Viewed from the axial direction of the orbital axis, the Muller wheel has an annular first side wall provided on its bottom so as to surround the orbital axis, inside the orbital trajectory of the Muller wheel, On the inner side of the aforementioned side portion, an annular second side wall is provided on the bottom portion so as to surround the orbital path when viewed from the axial direction, Mixing machine.
3. The second side wall is detachably attached to the bottom. The kneader according to claim 2.
4. The bottom portion is provided with an annular groove that surrounds the orbital axis on the outside of the first side wall and on the inside of the second side wall. The kneader according to claim 2.
5. The groove portion is A first side surface that is continuous with the surface of the first side wall facing the second side wall, A second side surface of the second side wall that is continuous with the surface of the second side wall that faces the first side wall, Having a bottom surface connecting the first side surface and the second side surface, The kneading machine according to claim 4.
6. The first side and the second side each include a curved portion connected to the bottom surface. The kneading machine according to claim 5.
7. The height of the second side wall is greater than the height of the first side wall. The kneader according to claim 2.
8. The bottom portion comprises a main body connected to the side portion, and a bottom plate material provided on the main body and detachably attached to the main body. The first side wall is attached to the bottom plate material. A kneading machine according to any one of claims 1 to 7.
9. The bottom portion comprises a main body connected to the side portion, and a bottom plate material provided on the main body and detachably attached to the main body. The groove portion is provided in the bottom plate material. The kneading machine according to claim 1 or 4.
10. The first side wall is detachably attached to the bottom, A kneading machine according to any one of claims 1 to 7.