JP2014004540A - Stirring defoaming apparatus, stirring defoaming method, control program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stirring defoaming apparatus which achieves a more uniform dispersion state of a material.SOLUTION: A stirring defoaming apparatus 11, in which a container 12 containing a material M is rotated while revolved around a predetermined revolution axis L1, comprises: a revolution motor 22 for revolving the container 12; a rotation motor 21 for rotating the container 12; and a control unit 23 for controlling the revolution motor 22 and the rotation motor 21 so that a magnitude F of a force, working on microvolume elements of the material M due to the revolution, and a magnitude f of a force, working on the microvolume elements of the material M due to the rotation, satisfy F<f.

Description

  The present invention relates to a stirring deaerator for stirring and defoaming a material.

  Conventionally, a configuration in which a container containing a material to be stirred (hereinafter simply referred to as “material”) is rotated while holding a container holder and revolving while rotating is known. (For example, refer to Patent Document 1).

  In such a self-revolving type stirring and defoaming device, the purpose of the revolution of the container is to move the material in the centrifugal direction by the large centrifugal force generated. On the other hand, the purpose of the rotation of the container is to generate a spiral convection in the material by a twisting torque caused by a frictional force between the inner wall of the container and the material. Specifically, the centrifugal force generated by the revolution of the container presses the material against the inner wall of the container to release the air bubbles contained in the material to the outside, and the material in the container is convected by the rotational movement of the container. It is designed to stir.

Japanese Patent No. 2711964 (issued February 10, 1998)

  However, the inventors have found that with the technique described in Patent Document 1, the behavior of the resin during stirring differs depending on the magnitude relationship between the centrifugal force due to revolution and the frictional force due to rotation. First, in order to sufficiently degas the material, it is necessary to perform a revolving motion at a high rotational speed and increase the centrifugal force. This is because the larger the force pressing the material against the inner wall of the container or the bottom of the container, the easier it is to release bubbles contained in the material to the outside. However, when the frictional force due to rotation is relatively small with respect to the centrifugal force of revolution, the material is only pressed against the inner wall of the container, and the generation of spiral convection is weakened and the stirring performance is lowered. In other words, in order to obtain sufficient stirring and defoaming performance, the inventors performed a revolving motion at a large rotational speed, and a condition in which the frictional force generated by the rotational rotation exceeds the centrifugal force generated by the rotational rotation. And obtained the knowledge that it is necessary to carry out stirring and defoaming.

  In addition, in commercial devices, the rotation speed ratio is often constant due to the simplicity of the mechanism, but at that time, the rotation speed is such that the frictional force generated by rotation rotation exceeds the centrifugal force generated by rotation rotation. The ratio cannot be increased. Therefore, it may be difficult to generate a spiral convection in the material under a high revolution speed condition.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stirring and defoaming device that makes the dispersed state of the material more uniform.

  In order to solve the above-mentioned problems, a stirring and defoaming apparatus according to the present invention is a stirring and defoaming apparatus that rotates a container containing a material while revolving around a predetermined revolution axis, and revolves the container. A revolution drive unit, a rotation drive unit for rotating the container, a magnitude F of a force acting on a minute volume element of the material accommodated in the container by revolution, and a minute amount of the material accommodated in the container by rotation. Control means for controlling the revolution drive unit and the rotation drive unit so that the magnitude f of the force acting on the volume element satisfies F <f.

  According to the above configuration, the control means is configured such that the magnitude F of the force acting on the minute volume element of the material accommodated in the container by revolution is the force acting on the minute volume element of the material accommodated in the container by rotation. The revolution drive unit and the rotation drive unit are controlled so as to revolve and rotate at a revolution speed and a rotation speed that are smaller than the size f.

  Thereby, since spiral convection is generated in the material, the dispersed state of the material can be made more uniform.

  In addition, the control means of the stirring and defoaming device includes, in a certain period, a magnitude F of a force acting on a microvolume element of the material accommodated in the container by revolution, and a material accommodated in the container by rotation. The revolving drive unit and the rotation driving unit are controlled so that the magnitude f of the force acting on the minute volume element satisfies F <f, and the material accommodated in the container by revolving in other periods The revolution F so that the magnitude F ′ of the force acting on the minute volume element and the magnitude f ′ of the force acting on the minute volume element of the material accommodated in the container by rotation satisfy F ′> f ′. It is preferable to control the driving unit and the rotation driving unit.

  According to the above configuration, in a certain period, the control means is configured such that the magnitude F of the force acting on the microvolume element of the material accommodated in the container by revolution is the microvolume element of the material accommodated in the container by rotation. The revolution drive unit and the rotation drive unit are controlled so as to revolve and rotate at a revolution speed and a rotation speed that are smaller than the magnitude f of the force acting on the motor. As a result, spiral convection occurs in the material, so that the material is uniformly dispersed.

  In another period, the control means acts on the microvolume element of the material accommodated in the container by rotation by the magnitude F ′ of the force acting on the microvolume element of the material accommodated in the container by revolution. The revolution drive unit and the rotation drive unit are controlled so as to revolve and rotate at a revolution speed and a rotation speed that are larger than the magnitude f of the force. As a result, the material is pressed against the inner wall of the container by the magnitude F ′ of the force acting on the microvolume element of the material accommodated in the container by revolution, so that the bubbles in the material can be discharged to the outside. . Therefore, sufficient defoaming of the material can be performed.

  Therefore, the stirring and defoaming apparatus can suitably perform stirring and defoaming of the material.

In the agitation deaerator, when the rotation radius is r, the area of the surface of the minute volume element of the material is S, the material viscosity is μ, the rotation angular velocity is ω ₂ , and the bulk of the material is h, the rotation The magnitude f of the force acting on the microvolume element of the material contained in the container by

It is preferable to satisfy.

  According to the above configuration, the stirring and defoaming device controls the revolution driving unit and the rotation driving unit so that f given by the above formula satisfies F <f, whereby the stirring and defoaming device Defoaming can be performed more suitably.

In the stirring and deaerator, the rotation radius is r, the area of the surface of the minute volume element of the material is S, the material viscosity is μ, the rotation angular velocity in the certain period is ω ₂ , and the rotation angular velocity in the other period is ω ₂ ′, where the volume of the material is h, the magnitude f of the force acting on the microvolume element of the material accommodated in the container by the rotation in the certain period is:

And the magnitude f ′ of the force acting on the microvolume element of the material accommodated in the container by the rotation in the other period is:

It is preferable to satisfy.

  According to the above configuration, the control means controls the revolution driving unit and the rotation driving unit so that f given by the above formula satisfies F <f in a certain period, and the above formula in the other period. By controlling the revolution drive unit and the rotation drive unit so that f ′ given by F ′ satisfies f ′> f ′, the stirring and defoaming device can more suitably perform stirring and defoaming of the material. .

  In order to solve the above-described problems, a stirring and defoaming method according to the present invention includes a revolution driving unit that revolves a container containing a material around a predetermined revolution axis, and a rotation driving unit that rotates the container. The stirring and defoaming method of the stirring and defoaming apparatus, wherein the force F acts on the microvolume element of the material accommodated in the container by revolution, and the microvolume of the material accommodated in the container by rotation. It includes a control step of controlling the revolution driving unit and the rotation driving unit so that the magnitude f of the force acting on the element satisfies F <f.

  According to the said structure, there exists an effect similar to the stirring deaeration apparatus which concerns on this invention.

  Also, a control program for operating a computer as the stirring and defoaming apparatus according to the present invention, a control program for causing the computer to function as the means, and a computer-readable record in which such a control program is recorded Media are also included in the scope of the present invention.

  The stirring and defoaming device according to the present invention is a stirring and defoaming device that rotates a container containing a material while revolving around a predetermined revolution axis, the revolving drive unit for revolving the container, and the container Rotation driving unit for rotating, magnitude F of force acting on the minute volume element of the material accommodated in the container by revolution, magnitude of force acting on the minute volume element of the material accommodated in the container by rotation and a control means for controlling the revolution drive unit and the rotation drive unit so that f satisfies F <f.

  Thereby, since spiral convection is generated in the material, the dispersed state of the material can be made more uniform.

It is a schematic block diagram of the stirring deaeration apparatus based on this embodiment. It is a conceptual diagram for demonstrating the revolution centrifugal force which the micro volume element in a material receives in this embodiment. It is a figure which shows an example of the coordinate in the cylindrical coordinate system of the material accommodated in the container. It is a figure for demonstrating an example of the flow-velocity distribution in the y-axis direction of the flow velocity of the said material when the stirring and defoaming apparatus which concerns on this embodiment performs stirring of a material. It is a figure for demonstrating an example of the flow-velocity distribution in the z-axis direction of the flow velocity of the said material when the stirring and defoaming apparatus which concerns on this embodiment performs stirring of a material. It is a figure for demonstrating an example of the direction of the vector of the revolution centrifugal force and rotational friction force which are applied to a microvolume element when the stirring deaeration apparatus which concerns on this embodiment stirs material. It is a figure which shows an example of the revolution centrifugal force and autorotation frictional force concerning a material with respect to a rotational speed when the stirring and defoaming apparatus which concerns on this embodiment performs stirring of a material. It is a flowchart which shows an example of the flow of the stirring defoaming method as a comparative example of this embodiment. It is a figure which shows the specific example of the state of material when material is stirred with the stirring defoaming method of the comparative example of this embodiment. It is the flowchart which showed an example of the flow of the stirring defoaming method by the stirring defoaming apparatus which concerns on this embodiment. It is a figure which shows the specific example of the state of the material at the time of stirring material by the stirring defoaming method by the stirring defoaming apparatus which concerns on this embodiment. It is a figure which shows chromaticity distribution of fluorescent substance resin at the time of carrying out stirring defoaming of fluorescent substance resin with the stirring defoaming method of a comparative example. It is a figure which shows chromaticity distribution of fluorescent substance resin at the time of carrying out stirring defoaming of fluorescent substance resin with the stirring defoaming method of the stirring defoaming apparatus in this embodiment.

  Embodiments to which the present invention is applied will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments. That is, all the configurations described in the following embodiments are not necessarily essential to the present invention. Moreover, this invention includes what combined the following content.

[Configuration of stirring deaerator]
First, the stirring deaerator 11 according to the present embodiment will be described with reference to FIG. The stirring defoaming device 11 is a device for stirring and defoaming an agitated defoaming material (a different material such as a liquid material or a powder material). FIG. 1 is a schematic configuration diagram of a stirring deaerator 11. As shown in FIG. 1, the stirring and defoaming device 11 includes a container 12, a container holder 13, a holder receiver 14, a pedestal 15, a rotation motor (rotation drive unit) 21, a revolution motor (revolution drive unit) 22, and a control unit ( Control means) 23. In the present embodiment, the stirring defoaming material is described as material M.

  The holder receiver 14 has a container holder 13 holding the container 12 mounted inside the holder receiver 14. The holder receiver 14 is installed on the pedestal 15.

  The revolution motor 22 is a drive motor that rotates the pedestal 15 about a revolution rotation shaft (revolution shaft) L1. When the revolution motor 22 revolves, the holder receiver 14 installed on the pedestal 15, the container holder 13 and the container 12 attached to the holder receiver 14, and the material M accommodated in the container 12 are indicated by the arrow A. Rotate (revolve) in the direction.

  The rotation motor 21 is a drive motor that rotates (rotates) the holder receiving portion 14 in the direction of arrow B around the rotation axis L2. Note that the rotation motor 21 may be configured to rotate the holder receiving portion 14 via a belt, a pulley, a bearing, or the like (not shown).

  The direction in which the rotation motor 21 rotates the holder receiving portion 14 and the direction in which the revolution motor 22 rotates the base 15 are not limited to this, and may be opposite to the direction shown in FIG. That is, the direction in which the rotating motor 21 rotates the holder receiving portion 14 and the direction in which the revolving motor 22 rotates the pedestal 15 may be opposite to each other. As described above, the stirring and defoaming device 11 having different revolution direction and rotation direction can stir the material M in the container 12 by convection generated by the revolution and rotation.

  The control unit 23 controls the rotation motor 21 and the revolution motor 22. Specifically, the rotational speeds of the rotation motor 21 and the revolution motor 22 are controlled.

  Further, as shown in FIG. 1, in this embodiment, the revolution rotation axis L1 and the rotation rotation axis L2 are configured to be parallel, but the revolution rotation axis L1 and the rotation rotation axis L2 are parallel. It is not limited to that.

  In this embodiment, examples of the stirring and defoaming device used as the stirring and defoaming device 11 include V-mini300 manufactured by EME, ARV-310 manufactured by Shinky, and the like.

[About the stirring deaeration method of the stirring deaerator]
In the stirring and defoaming method of the stirring and degassing apparatus 11 in this embodiment, the behavior of the material M (resin) during stirring differs depending on the magnitude relationship between the centrifugal force due to revolution and the frictional force due to rotation. First, the force received by the material M due to revolution and rotation will be described below. Here, in order to simplify the description, the force received by the material M is represented by the force received by the microvolume element in the material M. In this description, M indicates the entire material, and a microvolume element (for example, a volume element for one particle) in the material M is a microvolume element 71 and the mass of the microvolume element 71 is m. Here, the minute volume element 71 is assumed to be a cube.

  In addition, although the stirring defoaming apparatus 11 demonstrates as an example the structure by which the revolution rotating shaft L1 and the rotation rotating shaft L2 are parallel as shown in FIG. 1, the revolution rotating shaft L1 and the rotating rotating shaft L2 are not parallel. The theory described below also holds true for the stirring deaerator.

(Revolving centrifugal force)
First, the force (revolving centrifugal force) applied to the material M by revolution will be described with reference to FIG. FIG. 2 is a conceptual diagram for explaining the revolving centrifugal force received by the microvolume element in the material according to the present embodiment. In FIG. 2, R represents the revolution radius, ω ₁ represents the revolution angular velocity, F represents the centrifugal force (revolution centrifugal force) acting on the minute volume element 71, and 31 represents the direction vector of the force of the revolution centrifugal force F.

The revolution centrifugal force F received by the minute volume element 71 in the material M by revolution can be expressed by the following equation (1) using the revolution radius R, the mass m, and the revolution angular velocity ω ₁ .

  The direction of the revolving centrifugal force F is the revolving centrifugal direction as indicated by a vector 31 in FIG.

(Rotational friction force)
The force (spinning frictional force) received by the material M due to rotation will be described with reference to FIGS. In obtaining the rotational friction force, first, the flow rate of the material M will be described with reference to FIG. FIG. 3 is a diagram illustrating an example of coordinates in the cylindrical coordinate system of the material accommodated in the container. In the present embodiment, the container 12 is assumed to be cylindrical, but the shape of the container 12 is not limited to this.

  As shown in FIG. 3, the rotation center on the inner bottom surface (hereinafter simply referred to as the bottom surface) of the container 12 is the origin 41, the height direction of the container 12 from the rotation center (the direction of the rotation axis L2) is the z axis, The radial direction from the center of rotation is taken as the y-axis. A direction perpendicular to the two axes (y axis and z axis) is defined as an x axis.

  The container 12 contains a material M, and the height (bulk) of the material M is h. Further, the radius (spinning radius) of the bottom surface of the container 12 is r. In addition, in the yz plane in the material M, an area where both the y coordinate and the z coordinate are positive values is defined as a plane 42. Further, a line segment parallel to the y axis in the plane 42 is a line segment 43, and a contact point between the line segment 43 and the inner side surface of the container 12 (hereinafter referred to as an inner wall) is a contact 44, and the line segment 43 and the z axis are Let the intersection be an intersection 45. Here, when the line segment 43 is a line segment that satisfies z = z, the coordinates of the contact point 44 can be expressed as (0, r, z), and the coordinates of the intersection 45 can be expressed as (0, 0, z).

  Further, a line segment parallel to the z-axis in the plane 42 is a line segment 46, a contact point between the line segment 46 and the bottom surface (y-axis) of the container 12 is a contact point 47, and the line segment 46 and the surface of the material M (z = h). The intersection point with the surface to be filled is defined as an intersection point 48. Here, when the line segment 46 is a line segment that satisfies y = y, the coordinates of the contact point 47 can be expressed as (0, y, 0), and the coordinates of the intersection point 48 can be expressed as (0, y, h).

  If the intersection of the line segment 43 and the line segment 46 is an intersection point 49, the coordinates of the intersection point 49 can be represented by (0, y, z).

Further, the velocity (flow velocity) of the material M at the intersection 49 (coordinates (0, y, z)) during stirring is defined as u _x (0, y, z). It is assumed that the coordinates of the minute volume element 71 of the material M are (0, r, 0).

Here, the flow velocity u _x (0, y, z) at the intersection 49 of the plane 42 of the material M is equal to the flow velocity u _x (y) of the material M on the line segment 43 at y = y and the line segment at z = z. Suppose that it is represented by the sum of the flow velocity u _x (z) of the material M on 46.

  With reference to FIG. 4, what kind of flow velocity distribution is generated in the material M on the line segment 43 in the plane 42 will be described. FIG. 4 is a diagram for explaining the flow velocity distribution in the y-axis direction of the flow velocity of the material M when the stirring and defoaming device 11 according to the present embodiment stirs the material M.

  In FIG. 4, the inner wall of the container 12 is described as the inner wall 51. As described above, the line segment 43 is a line segment parallel to the y-axis in the plane 42, the contact 44 is a contact point between the line segment 43 and the inner wall 51 of the container 12, and the intersection 45 is a line segment 43 and This is the intersection with the z-axis. The coordinates of the contact 44 are (0, r, z), and the coordinates of the intersection 45 are (0, 0, z).

Further, the rotational peripheral speed of the inner wall 51 of the container 12 can be represented by rω ₂ using the radius r of the bottom surface of the container 12 and the rotational angular speed ω ₂ .

When stirring defoaming device 11 performs agitation of the material M, assuming the contact 45 is a rotation center with respect to the radial direction, the flow velocity u _x of the material M to indicate a power function (flow velocity distribution) as shown in FIG. 4 Then, the flow velocity u _x (y) of the material M on the line segment 43 at y = y can be expressed by the following equation (2).

When the stirring and defoaming device 11 stirs the material M, the material M located at the contact 44 that is a contact between the inner wall 51 of the container 12 and the line segment 43 causes the inner wall 51 of the container 12 to be frictional with the inner wall 51. It moves to be dragged by. Therefore, when y = r, the line segment 43 above (i.e., the contact 44) material M located, when the rotational angular velocity and omega _2, considered to move at a flow rate expressed by the following equation (3).

That is, the material M located on the line segment 43 when y = r is considered to move at half the speed of rotation peripheral speed rω _2. In addition, since the material M located at the intersection 45 that is the center of rotation does not move, when y = 0, the flow velocity of the material M located on the line segment 43 (that is, the intersection 45) is u _x = 0. .

From the simultaneous equations obtained by substituting Equation (3) and u _x = 0 into Equation (2), the following Equation (4) is obtained.

Therefore, the flow velocity u _x (y) of the material M on the line segment 43 at y = y can be expressed by the following equation (5).

  Therefore, the flow velocity distribution in the container radial direction (y-axis direction) of the flow velocity of the material M when the stirring and defoaming device 11 stirs the material M becomes a distribution as shown by a broken line in FIG.

  Next, what kind of flow velocity distribution is generated in the material M on the line segment 46 in the plane 42 will be described with reference to FIG. FIG. 5 is a diagram for explaining the flow velocity distribution in the z-axis direction of the flow velocity of the material M when the stirring and defoaming device 11 according to the present embodiment stirs the material M.

  In FIG. 5, the bottom surface of the container 12 is described as the bottom surface 61. Further, as described above, the line segment 46 is a line segment parallel to the z-axis in the plane 42, the contact point 47 is a contact point between the line segment 46 and the bottom surface 61 of the container 12, and the intersection point 48 is This is the intersection with the surface of the material M (the surface satisfying z = h). The coordinates of the contact 47 are (0, y, 0), and the coordinates of the intersection 48 are (0, y, h).

In addition, the rotational peripheral speed of the bottom surface 61 of the container 12 can be expressed by yω ₂ using the rotational angular speed ω ₂ .

When stirring defoaming device 11 performs agitation of the material M, of the vessel 12 from the contact 47 with respect to the height direction (z axis direction), power function, such as flow rate u _x of the material M is shown in FIG. 5 (flow velocity distribution ), The flow velocity u _x (z) of the material M on the line segment 46 at z = z can be expressed by the following equation (6).

When the stirring deaerator 11 stirs the material M, the material M located at the contact 47 that is a contact between the bottom surface 61 of the container 12 and the line segment 46 moves so as to be dragged to the bottom surface 61 of the container 12. Therefore, when z = 0, the upper segment 46 (i.e., the contact 47) material M located, when the rotational angular velocity and omega _2, considered to move at a flow rate expressed by the following equation (7).

That is, when z = 0, the material M located on the line segment 46 is considered to move at a speed half the rotation speed yω ₂ of the bottom surface 61 of the container 12. Further, it is assumed that the flow velocity of the material M located at the intersection 48 that is the material surface is zero. That is, when z = h, the flow velocity of the material M located on the line segment 46 (that is, the intersection point 48) is u _x = 0.

From the simultaneous equations obtained by substituting equation (7) and u _x = 0 into equation (6), the following equations (8) and (9) are obtained.

Therefore, the flow velocity u _x (z) of the material M on the line segment 46 at z = z can be expressed by the following formula (10).

  Therefore, the flow rate distribution in the container height direction (z-axis direction) of the flow rate of the material M when the stirring deaerator 11 stirs the material M has a distribution as shown by a broken line in FIG.

At the time of stirring, the flow velocity u _x (0, y, z) of the material M at the intersection 49 (coordinate (0, y, z)) in FIG. 3 is the sum of u _x (y) and u _x (z). Therefore, the following expression (11) is obtained.

Therefore, the flow velocity distribution (velocity gradient) in the respective axial directions of u _x (0, y, z) is expressed by the following equations (12) and (13).

Here, when the material M is a viscous fluid, viscosity appears when the material M flows with relative motion between adjacent layers, and an action to average the flow velocity distribution generated in the material M is performed. Effect. The frictional stress τ _x generated at this coordinate (0, y, z) can be expressed by the following equation (14).

Next, let f be the force (spinning frictional force) received by the minute volume element 71 in the material M shown in FIG. When the contact area of the minute volume element 71 in the direction of the inner wall 51 (y-axis direction) of the container 12 is S ₁ and the contact area of the container 12 in the direction of the bottom surface 61 (z-axis direction) is S ₂ , the rotational friction force f is the friction. Using the stress τ _x and the material viscosity μ, it is expressed by the following equation (15).

Here, since the coordinates of the minute volume element 71 are (0, r, 0), the force (rotational friction force) f received by the minute volume element 71 in the material M is the area S ( Here, since the minute volume element 71 is assumed to be a cube, it is expressed by the following equation (16) using S = S ₁ = S ₂ ).

  In the above formula, A and B both represent constants.

(Relationship between revolving centrifugal force and rotational centrifugal force)
From the above, FIG. 6 shows the forces (revolving centrifugal force F and rotational friction force f) received by the microvolume element 71 when the stirring and defoaming device 11 revolves the container 12. FIG. 6 is a diagram for explaining an example of the vector directions of the revolving centrifugal force F and the rotational friction force f applied to the minute volume element 71 when the stirring deaerator 11 according to the present embodiment stirs the material M. It is.

  In FIG. 6, the angle formed by the y-axis and the tangent of a circle of radius (revolution radius) R is θ. As shown in FIG. 6, the revolution centrifugal force F applied to the minute volume element 71 works as a force that pushes the minute volume element 71 down in the revolution centrifugal direction. On the other hand, the rotational frictional force f applied to the minute volume element 71 works as a force for turning the minute volume element 71 to generate convection. The position θ of the minute volume element 71, that is, the angle θ formed by the straight line (y axis, line segment 43) connecting the minute volume element 71 and the center of rotation and the tangent of the circle of radius (revolution radius) R is (π / 2). ) <Θ <(3π / 2), the vector of the revolution centrifugal force F and the vector of the rotational friction force f are opposite to each other. In particular, when θ = π, the vector of the revolution centrifugal force F and the vector of the rotational friction force f are opposite to each other.

  At this time, if F> f, the minute volume element 71 is pushed back by F and cannot advance to the range of θ> π, so that it is considered that spiral convection does not occur. Thus, the behavior of the material M at the time of stirring differs depending on the magnitude relationship between the centrifugal force due to revolution (revolving centrifugal force) and the frictional force due to rotation (rotational frictional force).

  FIG. 7 is a graph showing the magnitude relationship between the magnitude of the force due to revolution with respect to the rotation speed and the magnitude of the force due to rotation. FIG. 7 shows the magnitude F of the revolving centrifugal force (force due to revolution) and the rotational friction force (force due to rotation) applied to the microvolume element 71 with respect to the rotation speed when the stirring deaerator 11 stirs the material M. It is a figure which shows an example of the magnitude | size f. In addition, the stirring and defoaming apparatus 11 used in FIG. 7 has a constant revolution speed ratio (spinning rotation speed: revolution rotation speed) (1: 2). In FIG. 7, the horizontal axis represents the rotation speed, and the vertical axis represents the magnitude of the force applied to the material M. Here, since the flow of the material M is assumed to be a non-Newtonian flow (a pseudoplastic fluid), the viscosity of the material M decreases as the rotation speed (rotation speed) of the rotation increases.

  As shown in FIG. 7, the magnitude relationship between the magnitude F of the force due to revolution and the magnitude f of the force due to rotation is switched with a certain revolution speed (Brpm in FIG. 7) as a threshold value. In other words, the speed region in which the revolution speed in FIG. 7 is greater than 0 rpm and less than B rpm (the revolution speed is greater than 0 rpm and less than B ′ rpm) is the area where the rotational friction force is dominant, and the revolution in FIG. The speed region where the rotational speed is higher than B rpm (the rotational rotational speed is higher than B ′ rpm) is a region where the revolution centrifugal force is dominant.

(About stirring defoaming method)
Next, the stirring defoaming method of the stirring defoaming apparatus 11 will be specifically described. In addition, below, after first explaining the stirring defoaming method as a comparative example, the stirring defoaming method in the stirring defoaming apparatus 11 of this embodiment is demonstrated. In addition, in the stirring and defoaming method as in the comparative example, in order to sufficiently degas the material M, the stirring and defoaming is often performed at a high rotation speed. That is, there are many cases where the revolving centrifugal force is a dominant region (that is, a region where F> f in FIG. 7). Therefore, in the stirring and defoaming method of the comparative example, it is assumed that stirring and defoaming is performed in a region where the revolution centrifugal force is dominant (in FIG. 7, the revolution speed is higher than Brpm).

<Comparative example>
First, with reference to FIG. 8 and FIG. 9, the stirring defoaming method which concerns on the comparative example of this embodiment is demonstrated. FIG. 8 is a flowchart showing an example of a flow of a stirring and defoaming method as a comparative example.

  As shown in FIG. 8, the stirring and defoaming method in the comparative example is performed by the following steps S81 and S82.

  Step S81: The container 12 containing the material M is held by the container holder 13.

  Step S82: The stirring deaerator 11 is operated to rotate the container holder 13 while revolving.

  FIG. 9 is a diagram illustrating a specific example of the state of the material M when the material M is stirred by the stirring and defoaming method of the comparative example. As shown in FIG. 9, in the stirring and defoaming method of the comparative example, since the stirring and defoaming is performed in a region where the revolution centrifugal force is dominant (that is, a region where F> f), the material M is in the centrifugal direction. The shape is such that it is pressed and stuck to the container 12.

  Therefore, it can be seen that, in the stirring and defoaming method of the comparative example, the material M is pressed against the inner wall 51 of the container 12, and the generation of convection becomes weak and does not reach a uniform dispersion state.

<Agitation defoaming method in the agitation deaerator 11>
Next, with reference to FIG. 10 and FIG. 11, the stirring defoaming method in the stirring defoaming apparatus 11 of this embodiment is demonstrated. FIG. 10 is a flowchart showing an example of the flow of the stirring and defoaming method in the present embodiment.

  As shown in FIG. 10, the stirring and defoaming method in the stirring and defoaming apparatus 11 of the present embodiment is performed by the following steps.

  Step S111: The container 12 containing the material M is held by the container holder 13.

  Step S112: The stirring deaerator 11 is operated to rotate the container holder 13 while revolving. Specifically, the control unit 23 of the stirring and defoaming device 11 rotates the rotation motor 21 and the revolution motor 22 in a region where the revolution centrifugal force is dominant (that is, a speed satisfying F> f).

  Step S113: The stirring deaerator 11 is operated to rotate the container holder 13 while revolving at a revolution speed smaller than that of Step S112. Specifically, the control unit 23 of the stirring and defoaming device 11 rotates the rotation motor 21 and the revolution motor 22 in a region where the rotation friction force is dominant (that is, a speed satisfying F <f) (control process). .

  FIG. 11 is a diagram illustrating a specific example of the state of the material M when the material M is stirred by the stirring and defoaming method using the stirring and defoaming device 11. First, in step S112, since the control unit 23 operates the rotation motor 21 and the revolution motor 22 at a speed satisfying F> f, the material M is pressed in the centrifugal direction as shown in FIG. Thereafter, since the control unit 23 operates the rotation motor 21 and the revolution motor 22 at a speed satisfying F <f, the material M has a shape in which spiral convection is generated as shown in FIG.

The threshold value (Brpm in FIG. 7) is, for example, the ratio between the rotation radius r and the revolution radius R, the ratio between the rotation angular velocity ω ₂ and the revolution angular velocity ω ₁ , the material viscosity μ, the material volume h, It changes depending on the inclination of the rotation axis.

  In Step S112 described above, when the revolution speed is increased in order to sufficiently degas the material M, the magnitude relationship between the magnitude F of the force due to revolution and the magnitude f of the force due to rotation as shown in FIG. The centrifugal force of revolution shows the dominant behavior. Therefore, the material M is sufficiently degassed by being pressed against the inner wall 51 of the container 12.

  Thereafter, in step S113, by rotating and revolving at a rotational speed smaller than the revolution speed in step S112, specifically, the speed at which the rotational friction force is dominant, as shown in FIG. Due to the magnitude relationship with the force f due to rotation, the frictional force of rotation shows a dominant behavior. Therefore, since the stirring deaerator 11 can generate a spiral convection in the material M to promote stirring, the stirring state of the material M can be advanced to uniform dispersion.

  In addition, although step S112 and step S113 mentioned above may be reverse, it is more preferable to perform step S112 before step S113.

<Experimental results according to this embodiment>
Next, experimental results according to this embodiment will be described. The present inventors stir and degas the material (phosphor resin) by the stirring and defoaming method shown in FIG. 8 and the stirring and defoaming method of the stirring and defoaming apparatus 11 according to this embodiment, The chromaticity of the LED package coated with the foamed phosphor resin was measured. The phosphor resin was accommodated in the container 12 in the order of phosphor, silicone resin main component, and silicone resin curing agent. The silicone resin has a viscosity of about 500 cP at room temperature, and the stirring and defoaming apparatus used has a rotation / revolution speed ratio of 1: 2.

  FIG. 12 is a diagram showing the chromaticity distribution of the phosphor resin when the phosphor resin is stirred and defoamed by the stirring and defoaming method shown in FIG. FIG. 13 is a diagram showing the chromaticity distribution of the phosphor resin when the phosphor resin is stirred and defoamed by the stirring and defoaming method of the stirring and defoaming device 11 in the present embodiment. 12 and 13, the horizontal axis indicates the application order (application amount (droplet)), and the vertical axis indicates the chromaticity y. Each chromaticity point is obtained by measuring and plotting the chromaticity of an LED package formed by applying a phosphor resin stirred using each method for each application amount.

  If stirring and defoaming is not sufficient, the phosphor concentration distribution in the phosphor resin varies. Therefore, when stirring and defoaming is not sufficient, the chromaticity distribution of the LED package varies.

  As shown in FIG. 12, it can be seen that the chromaticity distribution of the LED package varies. In the stirring and defoaming method shown in FIG. 8, as shown in FIG. 9, the phosphor resin is pressed against the inner wall 51 of the container 12, and the generation of spiral convection is weakened. As a result, it is considered that the phosphor resin was not stirred until it was uniformly dispersed, and the chromaticity y of the LED package coated with the phosphor resin varied.

  On the other hand, as shown in FIG. 13, in the stirring defoaming method according to the present embodiment, it can be seen that the variation in chromaticity y is greatly suppressed. In the stirring and defoaming method in the present embodiment, since rotation is performed at a rotation speed at which the frictional force of rotation is dominant as shown in FIG. 7, the phosphor resin has a spiral shape as shown in FIG. Convection occurred. As a result, the phosphor resin was agitated and the agitation progressed to a uniformly dispersed state. Therefore, it is considered that the variation in chromaticity y is reduced.

  In addition, in this embodiment, although the stirring and defoaming apparatus whose auto-revolution rotation speed is a predetermined ratio (for example, 1: 2) is used, this invention is not limited to this. The stirring and defoaming device 11 in the present invention may be a stirring and defoaming device in which the revolution speed ratio is not constant.

  As described above, the stirring and defoaming device 11 according to the present embodiment is a stirring and defoaming device that rotates the container 12 containing the material M while revolving around a predetermined revolution axis (revolution rotation axis L1). The stirring and defoaming device 11 includes a revolving motor 22 for revolving the container 12, a revolving motor 21 for revolving the container 12, and a magnitude F of a force acting on a micro volume element of the material M accommodated in the container 12 by revolving. The control unit 23 that controls the revolution motor 22 and the rotation motor 21 so that the magnitude f of the force acting on the minute volume element of the material M accommodated in the container 12 by rotation satisfies F <f. I have.

  According to the above configuration, the control unit 23 causes the magnitude F of the force acting on the minute volume element of the material M accommodated in the container 12 by revolution to act on the minute volume element of the material M accommodated in the container 12 by rotation. The revolving motor 22 and the revolving motor 21 are controlled so as to revolve and revolve at a revolving speed and a revolving speed that are smaller than the magnitude f of the force.

  Thereby, since spiral convection is generated in the material M, the dispersion state of the material M can be made more uniform.

  In addition, the control unit 23 of the stirring and defoaming apparatus 11 according to the present embodiment is accommodated in the container 12 by rotation and the force F acting on the minute volume element of the material accommodated in the container 12 by revolution. The revolving motor 22 and the rotating motor 21 are controlled so that the force f acting on the minute volume element of the selected material satisfies F <f, and in other periods, the minute volume element of the material M accommodated in the container 12 by revolution. The revolution motor 22 and the rotation motor 21 are controlled so that the force F ′ acting on the rotation force F ′ and the force f ′ acting on the minute volume element of the material M accommodated in the container 12 by rotation satisfy F ′> f ′.

  According to the above configuration, in a certain period, the control unit 23 causes the magnitude F of the force acting on the minute volume element of the material M accommodated in the container 12 by revolution to be adjusted in the material M accommodated in the container 12 by rotation. The revolving motor 22 and the revolving motor 21 are controlled so as to revolve and revolve at a revolving speed and a revolving speed that are smaller than the magnitude f of the force acting on the minute volume element. As a result, spiral convection occurs in the material M, so that the material is uniformly dispersed.

  In another period, the control unit 23 determines that the magnitude F ′ of the force acting on the minute volume element of the material M accommodated in the container 12 by revolution is the minute volume of the material M accommodated in the container 12 by rotation. The revolving motor 22 and the revolving motor 21 are controlled so as to revolve and revolve at a revolving speed and a revolving speed that are larger than the magnitude f of the force acting on the element. Thereby, since the material M is pressed against the inner wall of the container 12 by the magnitude F ′ of the force acting on the minute volume element of the material M accommodated in the container 12 by revolution, the bubbles in the material M are released to the outside. can do. Therefore, sufficient defoaming of the material M can be performed.

  Therefore, the stirring and defoaming device 11 can suitably perform stirring and defoaming of the material M.

In order to control the revolution motor 22 and the rotation motor 21 so as to satisfy F <f described above, it is generally necessary to take various parameters into consideration. According to the knowledge obtained by the present inventor, mass m, revolution radius R, revolution radius r, revolution angular velocity ω ₁ , revolution angular velocity ω ₂ , material viscosity μ, material viscosity μ, so that F <f is satisfied. The bulk h of the material in the container 12 may be selected.

In particular, the present inventor, for example, in the stirring deaerator 11 having a revolution radius R = 180 mm, a revolution radius r = 30 mm, and a revolution revolution speed ratio = 1: 2, the material density is 1.11 g / cm ³ , the material viscosity. In the case of μ = 500 mPa · s and the volume h of the material = 20 mm, it was found that the material can be more suitably stirred if the revolution speed is 600 rpm or less (rotational speed 300 rpm or less).

In other words, when the revolution radius R = 180 mm, the revolution radius r = 30 mm, and the revolution revolution speed ratio 1: 2, the material density is 1.11 g / cm by controlling the revolution revolution speed to be 600 rpm or less. ^3. It can be particularly preferably used when the material viscosity μ = 500 mPa · s and the material volume h = 20 mm.

  Moreover, when performing sufficient stirring defoaming by the stirring defoaming method in a comparative example, it is possible to lengthen stirring defoaming time. However, when the stirring and defoaming time becomes long, the temperature of the material in the container may change due to the influence of frictional heat generated by the stirring and defoaming or the heat generated by the stirring and defoaming device itself. When the temperature of a material changes, the physical properties of the material may change. Along with this, viscosity, agitation state, amount and size of bubbles, dispersion of filler, hot life (pot life) that will be the quality standard of the finished state May have a significant impact on

  However, according to the stirring and defoaming method of the stirring and defoaming device 11 in the present embodiment, the control unit 23 rotates with the magnitude F of the force acting on the microvolume element of the material M accommodated in the container 12 by revolution. The material is agitated by controlling the revolution motor 22 and the rotation motor 21 so that the magnitude f of the force acting on the minute volume element of the material M accommodated in the container 12 satisfies F <f. . Moreover, the magnitude F ′ of the force acting on the minute volume element of the material M accommodated in the container 12 by the revolution of the control unit 23 is the force acting on the minute volume element of the material M accommodated in the container 12 by the rotation. By controlling the revolving motor 22 and the revolving motor 21 so as to revolve and revolve at a revolving speed and a revolving speed that are larger than the size f ′, the material M is defoamed.

  As described above, the rotational speed of rotation and / or revolution when the material M is defoamed is different from the rotational speed of rotation and / or revolution when the material M is stirred, so that the rotational speed is the same. As compared with the case where rotation and revolution are performed, sufficient defoaming and stirring can be performed in a short time.

(About programs and recording media)
Moreover, each block of the stirring deaerator 11 described above may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the stirring deaerator 11, a CPU (central processing unit) that executes a command of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM (random access memory) that expands the program And a storage device (recording medium) such as a memory for storing the program and various data. The object of the present invention is to enable the computer to read the program code (execution format program, intermediate code program, source program) of the control program (authentication program) of the stirring and defoaming apparatus 11 which is software for realizing the above-described functions. This can also be achieved by supplying the recorded recording medium to the stirring and degassing apparatus 11 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM (registered trademark) / flash ROM.

  Moreover, the stirring deaerator 11 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR (high data rate), mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be widely used in the field of manufacturing a rotation / revolution type stirring deaerator.

DESCRIPTION OF SYMBOLS 11 Stirring deaerator 12 Container 13 Container holder 14 Holder receiving part 15 Base 21 Rotation motor (rotation drive part)
22 Revolution motor (revolution drive unit)
23 Control unit (control means)
31 Vector 41 Origin 42 Plane 43 Line segment 44 Contact point 45 Intersection point 46 Line segment 47 Contact point 48 Intersection point 49 Intersection point 51 Inner wall 61 Bottom surface 71 Small volume element L1 Revolution rotation axis L2 Rotation axis M Material

Claims (7)

A stirring and defoaming device for rotating a container containing a material while revolving around a predetermined revolution axis,
A revolution drive unit for revolving the container;
A rotation drive unit for rotating the container;
The magnitude F of the force acting on the microvolume element of the material accommodated in the container by the revolution and the magnitude f of the force acting on the microvolume element of the material accommodated in the container by the rotation are F <f A stirring and defoaming device comprising: a control unit that controls the revolution driving unit and the rotation driving unit so as to satisfy the above condition. The control means includes
In a certain period, the magnitude F of the force acting on the minute volume element of the material accommodated in the container by revolution and the magnitude f of the force acting on the minute volume element of the material accommodated in the container by rotation. , Controlling the revolution driving unit and the rotation driving unit so as to satisfy F <f,
In other periods, the magnitude F ′ of the force acting on the microvolume element of the material accommodated in the container by revolution, and the magnitude f of the force acting on the microvolume element of the material accommodated in the container by rotation. 2. The stirring and defoaming device according to claim 1, wherein the revolution driving unit and the rotation driving unit are controlled to satisfy “F”> f ′. The material accommodated in the container by the rotation when the rotation radius is r, the area of the surface of the minute volume element of the material is S, the material viscosity is μ, the rotation angular velocity is ω ₂ , and the volume of the material is h. The magnitude f of the force acting on the microvolume element of
The stirring and defoaming device according to claim 1, wherein: The rotation radius is r, the area of the surface of the microvolume element of the material is S, the material viscosity is μ, the rotation angular velocity in the certain period is ω ₂ , the rotation angular velocity in the other period is ω ₂ ′, and the volume of the material is When h, the magnitude f of the force acting on the microvolume element of the material accommodated in the container by the rotation in the certain period is:
The filling,
The magnitude f ′ of the force acting on the microvolume element of the material accommodated in the container by the rotation in the other period is:
The stirring and defoaming apparatus according to claim 2, wherein: A stirring and defoaming method of a stirring and defoaming device comprising a revolution driving unit that revolves a container containing a material around a predetermined revolution axis, and a rotation driving unit that rotates the container,
The magnitude F of the force acting on the microvolume element of the material accommodated in the container by the revolution and the magnitude f of the force acting on the microvolume element of the material accommodated in the container by the rotation are F <f A stirring and defoaming method comprising a control step of controlling the revolution driving unit and the rotation driving unit so as to satisfy the above condition.   A control program for operating a computer as the stirring and defoaming device according to any one of claims 1 to 4, wherein the computer functions as the means.   A computer-readable recording medium on which the control program according to claim 6 is recorded.