JP3729967B2 - Method for producing emulsion - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a good quality emulsion and a good quality emulsion.
[0002]
[Prior art]
An apparatus shown in FIG. 4 exists as an apparatus for producing an emulsion by stirring and mixing fluids. The stirring body 13 is provided in the casing 11 of this apparatus, and this stirring body 13 consists of the drive shaft 13a and the disc 13b attached to this drive shaft 13a. And the node member 14 is attached in the casing 11 in the form inserted between each disc 13b. The disc 13b is generally provided with a through hole 13c.
[0003]
This type of mixing apparatus performs stirring and mixing when the stirring body 13 vibrates up and down, but is characterized in that the disks 13b are made independent by the node members 14 (this book) In this specification, for convenience of explanation, this type of mixing device will be referred to as a partition stirring type mixing device). In such a partition agitation type mixing device, the mixing is performed by the vertical vibration of the disc 13b, but the space 15 between the node member 14 and the drive shaft 13a is fluidized by the vertical vibration of the stirring body 13. Mixing is also performed by coming and going.
[0004]
[Problems to be solved by the invention]
However, in the partition stirring type mixing apparatus according to the above-described conventional example, when the stirring body 13 vibrates, an excessive flow occurs in the interval 16 between the casing 11 and the disk 13b, and sufficient stirring and mixing cannot be performed. was there.
[0005]
The present invention has been made in view of the problems as described above, and its purpose is to provide a high-quality emulsion by using a partition stirring type mixing apparatus that has been improved such that an excessive flow does not occur from the periphery of the disk. Is to manufacture.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, a mixing apparatus according to claim 1 of the present application includes a cylindrical casing and a vibrating body disposed inside the casing, and the vibrating body is the casing. In the mixing device that performs mixing by vibrating relative to the casing, the vibrating body includes a drive shaft and a disk member attached to the drive shaft, and the disk is disposed in the casing. A node member extending between the members is provided, and the disk member and the node member have a plurality of through holes penetrating the disk member or the node member. Furthermore, the through hole of the disk member and the through hole of the node member are provided at positions that do not overlap each other.
[0007]
In order to provide the through hole of the disk member and the through hole of the node member so as not to overlap each other, the through hole of the node member is disposed on the inner edge side, and the through hole of the disk member is It is preferable that they are arranged on the outer edge side so that they do not overlap each other.
[0008]
According to the mixing apparatus according to the present invention having the above-described configuration, when the vibrating body vibrates, when the disk member and the node member approach or move away from each other, the through-holes provided in these members are accordingly provided. The fluid is allowed to pass through, and mixing is performed when the fluid passes through the through hole. In this case, in the mixing device according to the present invention, since the through hole of the disk member and the through hole of the node member are provided at positions that do not overlap each other, the fluid flow path in the casing becomes complicated. Favorable conditions will be provided in the formation of the emulsion. That is, the mixing force increases due to the complicated fluid flow path in the casing, and the dispersed phase of the emulsion is further refined. Therefore, the emulsion produced by the mixing apparatus according to the present invention has a finer dispersed phase as compared with the emulsion not provided in a position where the two through holes do not overlap each other. Further, as the fineness of the dispersed phase proceeds, the particle diameter of the dispersed phase particles dispersed in the continuous phase becomes uniform.
[0009]
The mixing apparatus according to the present invention is also characterized in that a taper in the same direction is provided on the peripheral edge of the disk member.
[0010]
In the case where the taper is provided, when the disk member moves in the direction in which the taper is opened, an excessive flow of fluid from the periphery of the disk member is strongly prevented. That is, when the peripheral edge of the disk member is tapered, when the disk member moves in the direction in which the taper is open, no extra flow from the periphery of the disk member occurs, and accordingly The fluid flow is concentrated in the plurality of through holes provided in the disk member. Therefore, when the vibrating body vibrates, a larger amount of fluid passes through the through-hole than when no taper is provided, and an improvement in stirring efficiency can be expected.
[0011]
In addition, by providing a taper, a natural fluid flow is generated in the mixing device. However, if the fluid is introduced in a direction opposite to the flow direction, the particle size distribution is reduced. It can also be expected that a better quality emulsion can be obtained than when not reversed.
[0012]
The emulsion obtained by the above apparatus and the method of obtaining the emulsion using the above apparatus are all included in the scope of the present invention. Further, all derivatives of this emulsion, that is, all fine particles obtained by processing this emulsion are also included in the scope of the present invention. The substance constituting the emulsion may be anything. That is, not only emulsions composed of normal water and oil (mineral oils such as paraffinic oils, edible oils such as animal oils and vegetable oils), but also biological substances such as emulsions and proteins having a silicon-based dispersed phase. An emulsion having a dispersed phase is also included.
[0013]
Examples of such fine particles include toner for copying / printing and column carriers. These processing methods include all of the processing methods usually performed by those skilled in the art, such as particle polymerization, separation and drying. In addition, it can be used for the production of pigments and paints as well as emulsions of edible, medical and cosmetics.
[0014]
For example, Japanese Patent Application Laid-Open No. 8-179552 (Japanese Patent Application No. 6-335146) discloses a toner production method. That is, for the production of toner, as in this production method, a dispersed phase formed by adding additives such as a colorant and a charge control agent into a monomer is converted into an aqueous phase (continuous phase) containing a dispersion stabilizer. Granulate by dispersing in. Then, this is set to a predetermined temperature to start the polymerization reaction. After the reaction is completed, the produced toner particles are washed, and then solid-liquid separation is performed by filtration or centrifugation. The obtained toner particles are collected and dried. In this process, when the toner particles to be granulated are produced through the emulsion according to the present invention, the particle size is appropriate, and in addition, the particle size of the dispersed phase particles of the emulsion is uniform. , Increase the yield of granulation. Further, if the particle size of the dispersed phase particles of the emulsion is uniform, the particles can be washed relatively easily, and the labor for solid-liquid separation can be reduced. In addition, ordinary emulsions contain a lot of very small particles, and this may pass through the recovery device, so that post-treatment may be very difficult, but like the emulsion according to the present invention, If the dispersed phase particles have a uniform particle size, such a situation does not occur and it is possible to contribute to environmental problems.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are diagrams showing a first embodiment of the present invention. Here, FIG. 1 is a longitudinal sectional view of the partition stirring type mixing apparatus according to the embodiment, FIG. 2 (A) is a sectional view taken along line AA in FIG. 1, and FIG. 2 (B) is a sectional view taken along line BB in FIG. It is sectional drawing. In addition, the same code | symbol is attached | subjected about the component similar to the past, and the description is abbreviate | omitted.
[0016]
As shown in FIG. 1, in the mixing apparatus according to the present invention, as in the conventional example, the disk 13b is attached to the drive shaft 13a, and the node member 14 is inserted between the disks 13b. Is mounted in the casing 11. A gap 15 is formed between the node member 14 and the drive shaft 13a.
[0017]
However, in the mixing apparatus according to the present embodiment, unlike the prior art, a through hole 13c that penetrates the disc 13b is provided on the outer edge side of the disc 13b (FIG. 2A), while penetrating the node member 14. By providing the through-hole 14c on the inner edge side of the disc 13b (FIG. 2B), the through-hole 13c of the disc 13b and the through-hole 14c of the node member 14 are provided at positions that do not overlap each other. (Claim 2). In such an aspect, there is no overlap between the through hole 13c and the through hole 14c, and the flow path is bent when the fluid passes through the through hole 13c and then passes through the through hole 14c. Compared with the case where the fluid passages are straight because the two through holes overlap each other, a complex force is applied to the fluid as much as the flow passages are bent, so that the environment for generating the emulsion is good. . Note that the positional relationship between the through-hole 13c and the through-hole 14c is not limited to the relationship that one of them is the outer edge side and the other is the inner edge side. Good.
[0018]
By the way, in the mixing apparatus which concerns on this invention, the taper 21 is provided in the peripheral part of the disk 13b (In addition, the taper 21 does not need to have roundness). When the taper 21 is provided in the disk 13b as described above, an excessive flow around the disk 13b is not generated, and stirring and mixing can be performed more effectively. Here, the excessive flow from the interval 15 is strongly prevented when the vibrating body 13 moves in the direction of (A) (that is, the direction in which the taper 21 is opened), and the through hole 13c and the interval are correspondingly increased. 16 can produce a strong flow. If a strong flow can occur in this part, the mixing efficiency can thereby be improved. For example, assuming the case where water and oil are added, without causing an excessive flow from the interval 15, by increasing the amount passing through the through-hole 13 c and increasing the flow velocity and the mutual contact area, Can promote their mixing.
[0019]
In the present invention, by providing the taper 21, a pumping action is generated in the mixing device. That is, as shown in FIG. 3, when the vibrating body 13 is driven up and down, the fluid is naturally pushed downward.
[0020]
Thus, in the present invention, by providing the taper 21, a natural fluid flow is generated in the mixing device due to the vibration of the vibrating body 13 (FIG. 3). If the fluid in the direction opposite to the direction of the fluid flow in the mixing device is introduced into the mixing device, the particle size distribution can be reduced and the quality is better than when the fluid is not reversed. An emulsion is obtained. That is, by introducing the fluid in a form against the naturally occurring flow by providing the taper 21 in the mixing device, the particle size distribution can be narrowed and an emulsion containing particles of uniform size can be produced. It is. In this embodiment, such fluid introduction is performed by the fluid introduction device 27.
[0021]
As mentioned above, although the embodiment of the mixing apparatus according to the present invention has been described, the vibration of the vibrating body 13 may be relative to the casing 11. That is, in this embodiment, the vibrating body vibrates in both apparatuses, but the casing side may be vibrated as seen in, for example, US Pat. No. 3,174,622.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a mixing apparatus according to the present invention.
2 is a cross-sectional view taken along line AA in FIG. 1 (FIG. 2A) and a cross-sectional view taken along line BB in FIG. 1 (FIG. 2B).
FIG. 3 is a view for explaining a natural flow of fluid in the mixing device generated by driving the mixing device according to the present invention.
FIG. 4 is a block diagram showing a functional configuration of a partition stirring type stirring and mixing apparatus according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Casing 13 Vibrating body 13a Shaft 13b Disc 13c, 14c Through-hole 14 Node member 21 Taper 27 Fluid introduction apparatus

Claims (3)

  A mixing device comprising a cylindrical casing and a vibrating body disposed inside the casing, wherein the vibrating body includes a drive shaft and a disk member attached to the drive shaft, and the casing A node member extending between the disk members is provided in the disk member, and the disk member and the node member have a plurality of through holes penetrating the disk member or the node member, and the circle In the mixing device, the through hole of the plate member and the through hole of the node member are provided at positions that do not overlap each other, and the vibrating body vibrates relative to the casing in the casing. To produce an emulsion by mixing two or more fluids. An emulsion is produced by mixing two or more kinds of fluids with a mixing device characterized in that a taper in the same direction is provided at the peripheral edge of the disk member in the mixing device according to claim 1. Method. The mixing device according to claim 2 , wherein two or more fluids are mixed by introducing into the mixing device a fluid having a direction opposite to a flow direction of the fluid in the mixing device caused by the vibration of the vibrating body. To produce an emulsion.

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