JP2007296498A - Agitation defoaming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitation defoaming apparatus capable of agitating a material to be agitated in a state where a container is fixed on a rotating base. <P>SOLUTION: The agitation defoaming apparatus comprises a rotary base 6 for fixing a container 10 containing a material to be agitated K on its periphery portion, a support member 3 for rotatably supporting the rotary base 6, and a first rotation driving mechanism 5 for revolving the container 10 by rotating the rotary base 6, and further comprises a shear rate generation means 7 for generating a shear rate to the material to be agitated K contained in the container 10, wherein the shear rate generation means 7 is composed of a shear rate generation portion 71 and a second rotation driving mechanism 72 for rotating and driving the shear rate generation portion 71. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stirring deaerator.

  In general, there is known a stirring and defoaming device configured to revolve on a revolution orbit while holding and revolving a container containing a material to be stirred on a container holder (see, for example, Patent Document 1).

This stirring and defoaming device is configured to rotatably support a container on a peripheral portion of a rotating base, and to revolve the container by rotating the rotating base, and to rotate the container itself on the rotating base. In this stirring and defoaming device, the material to be stirred is pressed against the inner wall of the container by the centrifugal force acting by the revolution of the container, and bubbles existing in the material to be stirred are discharged (defoamed) to the outside. In addition, due to the rotation of the container, shearing force is generated due to the difference in the moving speed of molecules of the material to be stirred (hereinafter referred to as “shearing speed”) near the inner wall of the container and away from the inner wall. However, the flow state of the material to be stirred is continuously maintained. Thereby, the whole to-be-stirred material is stirred. The larger the revolution speed, the better the defoaming action, and the higher the rotation speed, the better the stirring action.
Japanese Patent Laid-Open No. 10-43568 (paragraphs 0013 to 0023, FIG. 1)

  However, when a member (a container and a rotation axis) that rotates on a revolving track of a rotation base is disposed as in a conventional stirring and degassing device, the member (a container and a rotation axis) is greatly affected by acceleration. Therefore, it is very difficult to design the rotation mechanism.

In addition, when the influence of acceleration is taken into consideration in this way, there is a problem that the amount of material that can be stirred at a time is limited because the mass and capacity of the container cannot be increased.
Furthermore, considering the influence of acceleration in this way, there is a limit to increasing the rotation speed of the container, and a mechanism that can increase the rotation speed has been sought.

  Then, this invention is made | formed in view of an above described situation, and makes it a subject to provide the stirring deaerator which can stir to-be-stirred material in the state which fixed the container to the rotation base.

  In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention includes a rotating base in which a container for storing a material to be stirred is fixed to a peripheral portion, a support member that rotatably supports the rotating base, A first rotational drive mechanism that revolves the rotating base to revolve the container, and further includes shear speed generating means for generating a shear speed in the material to be stirred contained in the container. To do.

  According to the first aspect of the present invention, the container containing the material to be stirred is fixed to the peripheral edge of the rotation base, and the rotation base is rotated by the first rotation drive mechanism. Thereby, the container revolves, centrifugal force acts on the material to be stirred in the container, and the material to be stirred is defoamed. Further, the shearing speed generating means supported by the rotating base generates a shearing speed in the material to be stirred. Thereby, the material to be stirred is stirred. That is, conventionally, the shearing speed is generated in the material to be stirred by the inner wall of the rotating container. However, in the present invention, the shearing speed is generated by the shearing speed generating means configured separately from the container. Thereby, the material to be stirred can be stirred while the container is fixed to the rotating base.

  The invention according to claim 2 is the stirring defoaming device according to claim 1, wherein the shear speed generating means includes a shear speed generating portion having a shear flow surface provided so as to face the container, and the inside of the container. And a drive mechanism for driving the shear speed generator.

According to the second aspect of the present invention, the shear flow surface rubs against the material to be stirred in the container by driving the shearing speed generating portion (stirring member) by the drive mechanism (stirring member driving means). Generate a shear rate. Thereby, the material to be stirred can be stirred while the container is fixed to the rotating base.
As a drive mechanism for driving the shear rate generator, for example, the shear rate generator is operated to rotate, swing, or vibrate in the container (the shear rate generator is rotated relative to the container, Relative displacement).

  According to a third aspect of the present invention, in the stirring and defoaming device according to the second aspect, the drive mechanism is a second rotational drive mechanism that rotates the shear speed generating portion around an axis parallel to the inner wall of the container. It is characterized by that.

  According to the third aspect of the present invention, the shear flow surface is rubbed with the material to be stirred by rotating the shear rate generating portion by the second rotation driving mechanism, and the shear rate is generated in the material to be stirred. Thereby, the material to be stirred can be stirred while the container is fixed to the rotating base.

  The invention according to claim 4 is the stirring defoaming device according to any one of claim 2 or claim 3, wherein the shear flow surface is provided to be replaceable.

  According to the invention which concerns on Claim 4, it can replace with the shear flow surface of the shape suitable for the stirring of the to-be-stirred material according to the kind, viscosity, physical property, etc. of to-be-stirred material. Examples of the shape of the shear flow surface include a surface having a hemispherical curved surface or a planar shape in contact with the material to be stirred. Furthermore, a groove | channel and a protrusion part may be formed in the surface of a shear flow surface. According to this, since the material to be stirred can be flowed more effectively, the material to be stirred can be stirred more effectively.

  The invention according to claim 5 is the stirring and defoaming device according to any one of claims 2 to 4, wherein the shear flow surface is configured to change a height position in the container. It is characterized by.

  According to the invention of claim 5, when the container is attached to and detached from the rotating base, the height position of the shear flow surface is raised, and when the stirring process is performed, the height position of the shear flow surface is lowered and the container is lowered. Insert inside. Thereby, the container can be easily attached to and detached from the rotation base. In addition, when the stirring process is performed, the shear flow surface is positioned in the vicinity of the bottom of the container so as to contact the material to be stirred in the container. You may make it rotate a rotation base in the state located above the surface of the to-be-stirred material in a container. According to this, the to-be-stirred material (stirring material) adhering to the surface of the shear flow surface can be returned into the container by centrifugal force.

  The invention according to claim 6 is the stirring and defoaming device according to any one of claims 2 to 5, wherein the shear flow surface is provided so as to be close to the inner wall of the container. Features.

  According to the sixth aspect of the invention, in particular, even when the container sticks to the inner wall of the container by the action of centrifugal force, it is possible to generate a shear rate on the shear flow surface and stir.

  According to the stirring and defoaming device of the present invention, since the shearing speed is generated in the material to be stirred by the shearing speed generating means, the material to be stirred can be stirred while the container is fixed to the rotating base.

  In addition, as a mechanism for generating a shear rate in the material to be stirred, a mechanism for generating a shear rate is employed instead of a mechanism for rotating the container disposed on the revolution track as in the prior art. Design can be made easy.

  Furthermore, since it comprised so that a container might be fixed to a rotation base, the mass and capacity | capacitance of a container can be made larger than before. Further, the rotation of the rotation base can be made faster than before.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a longitudinal sectional view of a stirring deaerator of the present invention. Examples of the material to be stirred that is a processing target of the stirring and defoaming apparatus according to the present embodiment include solder paste, dental impression material, fats and oils, resins, pigments, various powders, and aircraft and vehicle bodies. There are composite materials such as carbon composite (epoxy resin, phenol resin, etc.), etc., but the material to be stirred is not particularly limited, and any material can be targeted.

  As shown in FIG. 1, the stirring and defoaming device 1 includes a housing 2, a support member 3 that is horizontally held inside the housing 2, a motor 4 attached to the support member 3, and a first rotation drive mechanism. 5, a rotation base 6 that is rotatably supported by the support member 3, and a shear speed generation means 7 that is supported in the vicinity of the revolution axis Y <b> 1 (see FIG. 3) of the rotation base 6.

  The housing 2 is a housing that accommodates the rotating base 6 and the like, and is formed in a rectangular parallelepiped shape. An openable / closable door portion 21 is provided on the side surface of the casing 2, and the container 10 described later can be attached to and detached from the rotation base 6 by opening the door portion 21. In addition, a detachable lid 22 is provided on the upper part, and the position of the shearing speed generating means 7 described later can be adjusted by removing the lid 22.

  The support member 3 is supported horizontally by a plurality of anti-vibration springs 9 on the side mounting portion 8 in the housing 2. A cylindrical base support portion 31 protruding upward is provided in the approximate center of the support member 3, and a bracket 32 for fixing the motor 4 in a state of being spaced from the support member 3 is attached to the lower surface side thereof. It has been.

  On the inner peripheral side of the base support portion 31, the rotary base 6 is rotatably supported via a bearing B1. The bracket 32 is formed with a through hole 32a and a cylindrical shaft member 32b protruding downward.

  The motor 4 is a drive source for the rotary base 6 and includes a motor main body 41 fixed to the lower side of the bracket 32 and a rotary shaft 42 protruding upward from the motor main body 41. The motor main body 41 drives the rotary shaft 42 to rotate. The rotating shaft 42 passes through the through hole 32 a of the bracket 32, and a tip portion thereof is located in a space between the support member 3 and the bracket 32.

  The first rotation drive mechanism 5 is a mechanism that rotates the rotation base 6 in the horizontal direction. The first pulley 51 that is directly connected to the rotation shaft 42 of the motor 4, the second pulley 52 that is directly connected to the lower portion of the rotation base 6, A belt 53 is provided between the first pulley 51 and the second pulley 52. The ratio of the radii of the first pulley 51 and the second pulley is set in accordance with the rotational speed of the motor 4 and the desired rotational speed of the rotary base 6, and is set to 1: 2, for example. As a result, the rotation of the rotation shaft 42 of the motor 4 is transmitted to the rotation base 6 via the first pulley 51, the belt 53, and the second pulley 52, and the rotation base 6 rotates at a desired number of rotations. ing. The ratio of the radii of the first pulley 51 and the second pulley 52 is not particularly limited, and can be appropriately changed according to the number of rotations of the motor 4 and a desired number of rotations of the rotation base 6.

FIG. 2 is a perspective view of the rotation base, and FIG. 3 is an enlarged cross-sectional view of a main part of a second rotation drive mechanism on the rotation base.
As shown in FIG. 2, the rotary base 6 is manufactured from, for example, an iron plate having a thickness of 15 mm in order to ensure rigidity, and has a rectangular bottom portion 60 and four side portions surrounding the bottom portion. 61, 62, 63, 64. Of these four side surfaces, the pair of side surfaces facing each other are referred to as side surfaces 61 and 62 and side surfaces 63 and 64, respectively.

  In the center of the bottom portion 60, a cylindrical rotation shaft 60a is provided so as to penetrate in the vertical direction. The above-described second pulley 52 is fixed to the lower portion of the rotation shaft 60a, and the rotation of the motor 4 (see FIG. 1) is transmitted to the second pulley 52, whereby the entire rotation base 6 rotates in the horizontal direction. To do. Further, a rectangular parallelepiped first shaft support portion 60b is provided in the vicinity of the rotation shaft 60a.

  The opposing side surface parts 61 and 62 are formed in a hexagonal shape in which both lower corners of the rectangular plate are cut out. The lower side is notched in accordance with the inclination of the side surface parts 63 and 64 where the side surface parts 61 and 62 are orthogonal to each other, and the weight is reduced by cutting out in this way. In addition, a second shaft support portion 61 a is provided on one of the side surface portions 61 and 62. The first shaft support portion 60b and the second shaft support portion 61a are located in the vicinity of the revolution axis Y1 (see FIG. 3).

  The opposing side surface parts 63 and 64 are formed in a rectangular shape, and are provided so as to incline outward by about 135 degrees with respect to the bottom part 60. Thereby, it becomes perpendicular | vertical with respect to the rotating shaft Y2 (refer FIG. 3) of the shear speed generation | occurrence | production part 71 mentioned later. One side surface portion 63 of these side surface portions 63 and 64 has a rectangular shape opening on the side surface portion 61 side orthogonal to the side surface portion 63. Fixing parts 63b and 63b having an L-shaped cross section are fixed to the opening end parts 63a and 63a of the side surface part 63, and a recess is formed by the opening end part 63a and the fixing tool 63b. The container 10 can be attached and detached between the fixture 63b and the fixture 63b.

  Here, the container 10 is formed in a bottomed cylindrical shape having an open top, and a rectangular flange 11 is welded to the outer periphery thereof. The flange 10 is fitted into a recess formed between the open end 63a and the fixture 63b, and is slid along the fixtures 63b and 63b so that the container 10 can be attached and detached.

  The shear rate generating means 7 includes a shear rate generator 71 that generates a shear rate for the material to be stirred in the container, and a second rotation drive mechanism 72 that rotationally drives the shear rate generator 71.

  The shear speed generating unit 71 is formed of, for example, metal, resin, or the like, and includes a shear flow surface 71a provided to face the container 10 and a support shaft 71b that supports the shear flow surface 71a. The

  The front end side (container 10 side) of the shear flow surface 71a is formed in a curved surface (spherical surface), and the inside thereof is hollow for weight reduction.

  The support shaft 71b is a shaft member that supports the shear flow surface 71a. As shown in FIG. 3, the support shaft 71b is rotatably supported by the second shaft support portion 61a of the rotation base 6 via a bearing B3 so as to be inclined at 45 degrees with respect to the horizontal direction. . The support shaft 71b is supported by the second shaft support portion 61a so as to be offset from the central axis X1 of the container 10 and parallel to the inner wall 10a of the container 10. As a result, the shear flow surface 71 a is disposed in the container 10 at a position close to the inner wall 10 a of the container 10. Further, a gear G6 described later is fixed to the upper end portion of the support shaft 71b. A key groove D is formed in the support shaft 71b along the axial direction, and the support shaft 71b is coupled to the gear G6 by a key (not shown) fitted in the key groove D. As a result, the support shaft 71b is slidable in the axial direction, and the rotation of the gear G6 is transmitted. Note that the slide movement of the support shaft 71b is performed manually.

  As shown in FIGS. 2 and 3, the second rotation driving mechanism 72 includes a fixed shaft 72 a inserted into the rotation shaft 60 a of the rotation base 6 and a first shaft support portion 60 b of the rotation base 6 (see FIG. 2). A first connection shaft 72b that is rotatably supported via a bearing (not shown), a second connection shaft 72c that is rotatably supported by a second shaft support portion 61a of the rotation base 6 via a bearing B4, and a gear. G1 to G6.

  As shown in FIG. 1, the fixed shaft 72a is supported on the rotary shaft 60a via a bearing B2, and the lower portion thereof is fixed to the bracket 32 by a pin P in a state of being inserted into the shaft member 32b. . Thereby, even if the rotation base 6 rotates, the fixed shaft 72a does not rotate. A gear G1 is fixed to the upper part of the fixed shaft 72a.

  As shown in FIG. 2, the first connecting shaft 72b is disposed in a direction orthogonal to the fixed shaft 72a. A gear G2 and a gear G3 are fixed to both ends of the first connection shaft 72b. The gear G2 is an orthogonal gear that meshes with the gear G1 at an axial angle of 90 °. Since the gear G2 is attached to the rotation base 6 side via the first connection shaft 72b, when the rotation base 6 is rotationally driven by the motor 4, it rotates as a planetarium gear that goes around the fixed gear G1. The rotation is transmitted to the gear G4 by the gear G3.

  As shown in FIG. 3, the second connecting shaft 72c is disposed so as to have an inclination of about 45 degrees with respect to the horizontal direction. Gears G4 and G5 are fixed to both ends of the second connecting shaft 72c. The gear G4 is an orthogonal gear that meshes with the gear G3 at an axial angle of 45 °. The gear G4 is rotated by the gear G3, and at the same time, the second connecting shaft 72c and the gear G5 rotate.

  The gear G5 is a spur gear that meshes with the gear G6. The rotation of the gear G5 is transmitted to the gear G6, whereby the support shaft 71b and the shear flow surface 71a described above rotate. That is, the second rotation drive mechanism 72 rotates the shear rate generator 71 around an axis parallel to the inner wall 10 a of the container 10. The radius ratio of each of the gears G1 to G6 is appropriately set according to the desired number of rotations of the support shaft 71b and the like.

  Next, operation | movement of the stirring deaeration apparatus 1 comprised as mentioned above is demonstrated in detail, referring drawings suitably. FIG. 4 is a diagram for explaining the operation of the stirring deaerator.

  First, as shown in FIG. 4A, the container 10 containing the material to be stirred K is set and fixed on the rotating base 6 with the support shaft 71b slid to the uppermost side. Then, as shown in FIG. 4B, the support shaft 71b is slid downward, and the support shaft 71b and the gear G6 are coupled with the shear flow surface 71a facing the inside of the container 10.

  And as shown in FIG.4 (c), by rotating the motor 4, rotation of the motor 4 is transmitted to the rotation base 6 via the 1st pulley 51, the belt 53, and the 2nd pulley 52, The rotation base 6 rotates. Thereby, the container 10 will revolve. On the other hand, when the rotary base 6 rotates, the fixed shaft 72a rotates relatively. That is, when viewed from the rotation base 6 side, the fixed shaft 72a rotates, and the rotation of the fixed shaft 72a is the gear G1, the gear G2, the first connection shaft 72b, the gear G3, the gear G4, the second connection shaft 72c, and the gear. It is transmitted to the support shaft 71b via G5 and the gear G6 (see FIG. 3). As a result, the support shaft 71b and the shear flow surface 71a rotate (spin) around the rotation axis Y2 (see FIG. 3).

  At this time, the agitated material K in the container 10 is degassed by the centrifugal force acting by the revolution of the container 10. In addition, the material to be agitated K is agitated by the shear flow surface 71a rotating (spinning) to generate a shear rate. In particular, since the shear flow surface 71a is close to the inner wall 10a of the container 10, even if the shear flow surface 71a sticks to the inner wall of the container 10 due to the action of centrifugal force, the shear flow surface 71a generates a shear velocity. , Can be stirred more effectively. Here, the “shear speed” is a movement speed (deviation) of molecules generated inside the material between the two members. The “shear speed” is generated in the liquid between two members, for example, when a liquid is filled between two members, one member is fixed, and the other member is moved.

  When the stirring process is almost completed, as shown in FIG. 4D, the support shaft 71b is slightly slid upward so that the shear flow surface 71a is slightly shifted upward in the container 10. Thereby, the height position in the container 10 of the support shaft 71b is changed. In this state, the motor 4 is driven to rotate again, the rotation base 6 is rotated, and the support shaft 71b is rotated (autorotated). Thereby, the to-be-stirred material K (stirring material) adhering to the surface of the shear flow surface 71a can be returned in the container 10 with a centrifugal force.

  Thereafter, as shown in FIG. 4E, the support shaft 71b is pulled up to remove the container 10 from the rotating base 6, and the process is completed.

According to the above, in the present embodiment, the following effects can be obtained.
According to the stirring and defoaming apparatus 1 according to the present embodiment, since the shearing speed is generated in the material to be stirred K by the shearing speed generating means 7, the stirring material K is stirred while the container 10 is fixed to the rotating base 6. can do.

  As a mechanism for generating a shearing speed in the material to be stirred K, a shearing speed generating means 7 is adopted instead of a conventional mechanism for rotating a container disposed on a revolution track, and this shearing speed generating means 7 is Since it is configured to support in the vicinity of the rotation axis of the rotation base 6 where the influence of acceleration is small, the design of the mechanism can be facilitated.

  Since it comprised so that the container 10 might be fixed to the rotation base 6, the capacity | capacitance and mass of the container 10 can also be made larger than before. For example, conventionally, due to the rotation of the container 10, the capacity of the container is 5 kg, but according to the stirring and defoaming device 1 according to the present embodiment, the capacity of the container is 100 kg to 200 kg or more. can do. Thereby, a large amount of stirring material is obtained by one process.

  Since the container 10 is configured to be fixed to the rotation base 6, the rotation speed of the rotation base 6 can be set to 10,000 rpm or more even if the influence of acceleration is taken into consideration. Thereby, the more effective defoaming of the to-be-stirred material K can be performed.

  The mass of the shear rate generator 71 can be made smaller than the total mass of the container, the material to be stirred in the container, the container storage mechanism, the rotation mechanism, and the like in the conventional stirring and defoaming apparatus. The second rotation drive mechanism 72 is configured to be disposed in the vicinity of the revolution axis Y1. Thereby, compared with the conventional stirring deaerator which rotates a container, the influence of an acceleration can be suppressed significantly and the design of a rotation mechanism becomes easy.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, It can implement with a various form.

  In the present embodiment, only one shear speed generating means 7 is provided. However, as shown in FIG. 5, two shear speed generating means 7 can be provided symmetrically about the revolution axis. According to this, the processing amount of the material to be stirred once is doubled and the rotation balance can be improved. Furthermore, three or more shear rate generating means 7 can be provided.

  In the shearing speed generating means 7, the shearing speed generating part 71 is rotated by the second rotational driving mechanism 72. However, a motor is provided in place of the second rotational driving mechanism 72, and the shearing speed generating part 71 is driven by this motor. You may comprise so that it may rotate. According to this, the shear rate can be generated in the material to be stirred K with a simple configuration.

  In the shear speed generating means 7, the shear speed generating section 71 is configured to be rotated by the second rotational drive mechanism 72. However, the shear speed generating means 7 may be any means as long as it generates the shear speed to the material K to be stirred. For example, the shear rate may be generated in the material K to be stirred by swinging or vibrating the shear rate generator 71.

  Further, due to the physical properties of the material to be stirred K, when the flow of the shearing speed generating means 7 alone does not reach the entire material to be stirred K, in addition to the shearing speed generating means 7, the shear flow surface is further increased. The swing mechanism or the swing mechanism 71a can be provided as necessary. As an example of the mechanism, after adjusting the rotational speed at an appropriate ratio from the first connecting shaft 72b that connects the gear G2 and the gear G3, a cam mechanism is provided to drive only the axial direction and upward direction. Mechanism. In the axial direction / downward direction, the support shaft 71b and the shear flow surface 71a can vibrate smoothly in the axial direction by the action of gravity and centrifugal force.

  In the shearing speed generating means 7, the tip end side of the shearing flow surface 71a is formed in a curved shape, but it may have any shape such as a planar shape. Moreover, you may form a groove | channel or a protrusion part in the surface of the shear flow surface 71a. According to this, since the material to be stirred K can be made to flow more effectively, the material to be stirred can be stirred more effectively than K.

  In the shear rate generating means 7, the shear flow surface 71a may be replaceable. According to this, the shape and the like of the shear flow surface 71a can be changed according to the type, viscosity, physical properties, and the like of the material to be stirred, so that the material to be stirred can be more effectively stirred.

  Although the slide movement of the support shaft 71b is performed manually, an automatic positioning mechanism in the axial direction may be provided and automated as necessary.

It is a longitudinal cross-sectional view of the stirring deaerator of the present invention. It is a perspective view of a rotation base. It is a principal part expanded sectional view of a 2nd rotation drive mechanism. It is a figure explaining operation | movement of a stirring defoaming apparatus. It is a longitudinal cross-sectional view of the stirring defoaming apparatus which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirring deaerator 2 Housing 3 Support member 4 Motor 5 1st rotation drive mechanism 6 Rotating base 7 Shearing speed generation means 8 Strut 9 Wire 10 Container 10a Inner wall 11 Flange 21 Door part 31 Base support part 32 Bracket 32a Through-hole 32b Shaft Member 41 Motor body 42 Rotating shaft 51 First pulley 52 Second pulley 53 Belt 60 Bottom portion 60a Rotating shaft 60b First shaft support portion 61, 62 Side surface portion 61a Second shaft support portion 63, 64 Side surface portion 63a End portion 63b Fixing tool 71 Shear velocity generating portion 71a Shear flow surface 71b Support shaft 72 Second rotation drive mechanism 72a Fixed shaft 72b First connection shaft 72c Second connection shaft K Stirred material

Claims (6)

A rotating base on which a container for containing a material to be stirred is fixed to a peripheral portion;
A support member for rotatably supporting the rotation base;
A first rotation drive mechanism for revolving the container by rotating the rotation base;
With
A stirring defoaming apparatus, further comprising a shearing speed generating means for generating a shearing speed in the material to be stirred accommodated in the container. The shear rate generating means is
A shear rate generator having a shear flow surface provided to face the container;
A drive mechanism for driving the shear rate generator in the container;
The stirring deaerator according to claim 1, comprising:   The stirring and defoaming apparatus according to claim 2, wherein the driving mechanism is a second rotation driving mechanism that rotates the shearing speed generating unit around an axis parallel to the inner wall of the container.   4. The stirring and defoaming device according to claim 2, wherein the shear flow surface is provided so as to be replaceable. 5.   The stirring defoaming device according to any one of claims 2 to 4, wherein the shear flow surface is configured to change a height position in the container.   The stirring defoaming device according to any one of claims 2 to 5, wherein the shear flow surface is provided so as to be close to an inner wall of the container.

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