JPH0534752Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a mixture of a viscous (slime-like) dispersion medium and a dispersoid, such as ink, paint, magnetic paint for magnetic recording media, etc. The present invention relates to a dispersion machine for uniformly dispersing the dispersoid in a dispersion medium.

[Prior Art] A conventional dispersion machine used for the above-mentioned mixture is shown in FIGS. 4 and 5. As shown in FIG. 4, a shaft 6 rotatably driven by a motor 5 is arranged in a cylindrical container 4, and a stirring plate 7,
7 are fixed at regular intervals. As shown in FIG. 5, the stirring plates 7, 7, . . . have a groove 13 extending spirally from the center.

The container 4 has an inlet 14 at the lower part and an outlet 15 at the upper part, and a screen 20 is provided in front of the outlet 15. The mixture of dispersion medium and dispersoid is sent from the tank 2 side through the duct 12 to the pump 3, where it is given a pressure of about 0.3 to 5.0 Kg/cm ² , and is then sent through the duct 11 from the inlet 14 to the container. 4 is pressurized and introduced.

In the container 4, about 40 to 90% of the volume of the container is stored with fine granular media having a particle size of 0.5 to 3 mm. This media includes the stirring plates 7, 7...
passes through the kerf 13, but does not pass through the screen 20.

In this disperser, the mixture pressurized and introduced into the container 4 from the introduction port 14 is stirred and mixed together with the media by the rotation of the stirring plate 7, so that the dispersoid is gradually and uniformly dispersed in the dispersion medium. Spread.
Furthermore, in addition to the action of the rotation of the stirring plate 7, this mixture is pushed by the mixture fed under pressure from the inlet 14 and gradually rises inside the container. At this time, by passing the media together with the grooves 13 of the stirring plate 7, the mixture is agitated and the dispersoids are more uniformly dispersed in the dispersion medium. After the mixture is separated from the media by the screen 20, it is taken out of the container 1 from the outlet 15.

In order to perform efficient and high-capacity dispersion in this dispersing machine, it is necessary to satisfy various conditions, but in particular, the media must be almost uniformly dispersed in the mixture in the container 4. This is very important.

Conventionally, various measures have been taken to prevent the media from being unevenly distributed in a specific location in the container 4, such as appropriately selecting the specific gravity of the media relative to the mixture, the pressure at which the mixture is introduced into the container 4, etc. Measures have been taken to harmonize the number of rotations of the stirring plate 7 and the pressure at which the mixture is introduced.

However, no matter how well the conditions are adjusted for mixing and dispersion, changes in the rheological properties of the mixture tend to cause the media to settle downward in the mixture, and the media tends to be biased toward the bottom of the container.
Therefore, if the dispersing machine continues to operate, a difference in the distribution of the media inevitably arises between the upper and lower sides of the container, and this becomes larger. For this reason, the dispersion ability of the disperser gradually decreases.

Therefore, as shown in Figures 4 and 5,
A dispersion machine has also been proposed in which the inside of the container 4 is partitioned into a plurality of chambers 16 by disposing screen plates 8, 8, . 55-157321).

In this disperser, the inner circumferential sides of the screen plates 8, 8... serve as bearings 22 to rotatably support the shaft 6, and the outer circumferential sides of the screen plates 8, 8... are made of fluorine resin, neoprene, etc. synthetic resin material,
A packing 23 made of a metal material such as copper or gunmetal, or a natural resin material such as wood is tightly attached to the inner peripheral surface of the container 4.

[Problem that the invention aims to solve] However, the media placed inside the container is
They are minute particles with a particle size of 0.5 to 3 mm, and these enter between the inner circumferential side of the screen plates 8, 8... and the shaft 6 or the outer circumferential side of the screen plates 8, 8... and the inner circumferential surface of the container 4. However, there was a problem in that this part was worn away by the flowing media and broke early, making it impossible to prevent the passage of the media.

In view of the above-mentioned conventional problems, the present invention can ensure the tightness of the inner and outer peripheral portions of the screen plate over a long period of time, and can maintain the state in which the media is uniformly dispersed in the container for a long time. The purpose is to provide a possible disperser.

[Means for solving the problem] That is, in order to solve the above problem, the means adopted in the present invention is a container 4 equipped with an inlet 14 for introducing the mixture under pressure and an outlet 15 for discharging the mixture, A shaft 6 inserted into the container 4 and driven to rotate; a stirring plate 7 attached to the shaft 6 for stirring the mixture and granular media in the container 4; In a viscous mixture dispersing machine that is divided into a plurality of chambers 16 including a plate 7 and is equipped with screen plates 8, 8, which allow only the mixture to pass through and block the passage of media, among the screen plates 8, 8... a plurality of cylindrical spacers 9 whose circumferential sides are fitted to the shaft 6;
9, and cylindrical spacers 10, 10, which are fitted so that the outer peripheral sides of the screen plates 8, 8, are in contact with the inner peripheral surface of the container 4.

[Function] In the dispersion machine, the inner and outer circumferential sides of the screen plates 8, 8... are fitted into a plurality of cylindrical spacers 9, 9... fitted to the shaft 6 so as to be in contact with the inner circumferential surface of the container 4. Since the media are sandwiched by the cylindrical spacers 10, 10, etc., the media is sandwiched between the inner circumferential side of the screen plates 8, 8..., the shaft 6, or the outer circumferential side of the screen plates 8, 8, and the inner circumferential surface of the container 4. Don't get between them. Therefore, that part is not worn away by the media, and its tightness is ensured over a long period of time. Thereby, during long-term operation of the disperser, it is possible to maintain a uniformly dispersed state of the media for a long time.

[Example] Next, an example of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a cylindrical container 4 is installed on a frame 1, and a shaft 6 rotated by a motor 5 is inserted into the container 4. As shown in FIG. Stirring plates 7, 7... are fixed to this shaft 6 at regular intervals via spacers 9, 9....
As shown in FIG. 2, the stirring plates 7, 7, . . . have a groove 13 extending spirally from the center.

The container 4 is provided with an inlet 14 at the lower part and an outlet 15 at the upper part, and the mixture of the dispersion medium and the dispersoid is sent from the tank 2 side to the pump 3 via the duct 12, where the concentration of 0.3 to 5.0 A pressure of approximately Kg/cm ² is applied, and the material is pressurized and introduced into the container 4 through the introduction port 14 through the duct 11.

Furthermore, inside the container 4, a screen plate 8,
8... vertically partitions the room into a plurality of rooms 16, 16.... This point will be explained in detail with reference to the drawings.

Various configurations of the screen plate 8 are shown in FIGS. 2 and 3. The screen plate 8 shown in FIG. 2 is a disk having a large number of circular holes 8a, 8a, . . . , and the diameters of the holes 8a, 8a, . . . are set smaller than the diameter of the media. In FIG. 3a, a large number of slit-like through holes 8b, 8b, . . . are formed in a disc, and the width of the slit-like through holes 8b, 8b, . Figures b and c show the slit-shaped through holes 8b, 8b... opened concentrically, and the slit-shaped through holes 8b, 8b shifted vertically and horizontally and expanded in the same direction, respectively. .

As shown in FIGS. 1 and 2, the inner periphery of these disc-shaped screen plates 8, 8... The shaft 6 is alternately sandwiched between stirring plates 7, 7, and so on, and the tip of the shaft 6 is fixed by tightening a bolt 19.

Then, an uneven strip 21a is formed on the inner periphery of the stirring plate 7 by knurling or the like, and an uneven strip 21b matching the uneven strip 21a is formed on the shaft 6 at each interval at which the stirring plate 7 is fixed. are formed, and by meshing these, the rotation of the motor 5 is transmitted via the shaft 6 to the stirring plates 7, 7...
is transmitted to. On the other hand, the screen plate 8,
8..., these uneven lines do not mesh with each other, and the rotation of the motor 5 is not transmitted.

Further, the outer peripheral sides of the screen plates 8, 8... are spaced at the same intervals as those fixed to the shaft 6 by cylindrical spacers 10, 10... fitted in the cylindrical container 1 so as to be inscribed therein. It is being pinched. Therefore, the motor 5 causes the stirring plates 7, 7...
is rotated, but the screen plates 8, 8, . . . are not rotated and remain stationary.

The screen plates 8, 8 fixed vertically in the container 4 allow the inside of the container 4 to be controlled by each stirring plate 7,
It is divided into 7... rooms 16, 16....

[Effects of the invention] As explained above, the disperser according to the invention has the following effects:
During the operation, the media in the container 4 enters between the inner and outer circumferential portions of the screen plate 8 and the inner circumferential surfaces of the shaft 6 and the container 4, and does not abrade those portions. As a result, it is possible to maintain the function of blocking the passage of media over a long period of time, and it is possible to maintain a state in which the media are uniformly distributed.

[Brief explanation of the drawing]

Figure 1 is a piping and cross-sectional view of a disperser showing an embodiment of the present invention, Figure 2 is an exploded perspective view showing the main components of the disperser, and Figure 3 is a cross-sectional view of the disperser used in the disperser. Perspective views showing various configurations of the screen plate, No. 4
The figure is a piping/cross-sectional view of a dispersing machine showing a conventional example,
The figure is an exploded perspective view showing the main components of the disperser. 4... Container, 6... Shaft, 7... Stirring plate,
8... Screen plate, 9, 10... Spacer, 1
4...Inlet, 15...Outlet, 16...Divided room.

Claims (1)

[Scope of utility model registration request] A container 4 equipped with an inlet 14 for introducing a mixture under pressure and an outlet 15 for discharging the mixture, and a shaft 6 inserted into the container 4 and driven to rotate.
and a stirring plate 7 attached to this shaft 6 to stir the mixture in the container 4 and the granular media.
and a screen plate 8 which partitions the inside of the container 4 into a plurality of chambers 16 including the stirring plate 7 and allows only the mixture to pass through and prevents the passage of media. A cylindrical spacer fitted such that the inner circumferential side of the screen plate 8 is sandwiched by a plurality of cylindrical spacers 9, 9... fitted to the shaft 6, and the outer circumferential side of the screen plate 8 is in contact with the inner circumferential surface of the container 4. A viscous mixture dispersing machine characterized by being sandwiched by 10, 10...