JPS6253214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a dispersion device for making a solid particle suspension (hereinafter sometimes referred to as "millbase") of paint, ink, etc. into a colloid.

[Prior art]

Various types of dispersion devices such as those described above are conventionally known. For example, there is a device that mixes a large number of relatively small particles (dispersion medium) in a mill base and performs dispersion by forcibly stirring them. be. However, in such conventional dispersion equipment, forced stirring is performed by rotating a drive rotating shaft equipped with multiple disks in one direction in a closed container, so the mill base and medium flow in the same direction and are not dispersed. Efficiency is not very good. In addition, since stirring is performed in a sealed state, the internal pressure increases due to the liquid flow, and it is necessary to install a sophisticated sealing mechanism around the rotating shaft to prevent liquid leakage. It may be necessary to encapsulate or circulate a sealing liquid. Furthermore, some conventional dispersion devices separate the dispersion medium and the dispersion liquid using a screen attached around the rotating shaft, but in this type of system, the area through which the dispersion liquid passes is small and internal pressure is applied, making it difficult to disperse. Significant wear of the screen by the media.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide a dispersion device that has good dispersion efficiency, does not require a precise sealing mechanism, and has less wear on the dispersion medium separation means.

[Summary of the invention]

In order to achieve the above object, the present invention provides an apparatus for colloidally dispersing a suspension of solid particles, in which the inner surface of a dispersion container is cylindrical, and an axis of symmetry of the cylindrical shape is disposed within the container. A drive rotation shaft is provided, a flat plate disk and a screw are attached to the drive rotation shaft, a dispersion medium can be charged into a dispersion container, and a dispersion medium is placed in the dispersion container along the rotation axis. A suspension feeding section is attached to one end of the screw, and a dispersion liquid discharging section is attached to the other end, and the direction of propulsion of the screw is directed toward the suspension feeding section. Provided is a dispersion device characterized by:

[Embodiments of the invention]

Hereinafter, specific embodiments of the dispersion apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention. The inner surface of the dispersion container 1 is cylindrical, and the ratio of its inner diameter to length is, for example, about 1/4.
A rotating shaft 2 penetrates into the container 1, and the rotating shaft 2 is rotatable around an axis of symmetry of the cylindrical inner surface of the container 1. The outer diameter of the rotating shaft 2 inside the container 1 is, for example, about 1/2 of the inner diameter of the container 1. The rotating shaft 2 is driven by a driving means 3. Approximately nine disks 4 and approximately three screws 5 are attached to the rotating shaft 2 inside the container 1. These disks 4 and screws 5 are detachably attached to the rotating shaft 2, and 6 is a collar for maintaining the distance between them. The screws 5 are all propelled in the same direction. The arrangement of the disk 4 and the screw 5 can be set as appropriate, but the feeding amount of the mill base,
Considering the degree of temperature rise, degree of dispersion, etc., the arrangement as shown in FIG. 1 is preferable. Further, the ratio of the inner diameter of the container 1 to the outer diameter of the disk 4 and the screw 5 is 4/5 to 7/
8 is preferred.

Figures 2 and 3 are perspective views of the disk 4. The disc in Figure 2 has 4 to 8 holes symmetrically in the circumferential direction, and the disc in Figure 3 has no holes. It is. By using a combination of the one shown in FIG. 2 and the one shown in FIG. 3, the temperature rise inside the container 1 can be suppressed. Figures 4 and 5 are perspective views of the screw 5, and the one in Figure 4 has one continuous thread.
~2 turns are provided, and the one in Fig. 5 has 2 to 4 independent threads. 6 is a perspective view of the collar 6. FIG.

In FIG. 1, a large number of dispersion media 7 are housed inside a container 1. As the medium 7, any medium commonly used in this type of dispersion device can be used, but preferably glass beads with a relatively low density are used. The particle size of the medium 7 is, for example, 0.5
~3mm.

A mill base feeding section 8 is provided at one end of the container 1, from which the mill base is continuously supplied. A dispersion liquid discharge part 9 is provided at the other end of the container 1 . The discharge section 9 has a front chamber 9a and a rear chamber 9b.
has. The front chamber 9a is separated from the inside of the container 1 by a cylindrical perforated plate (for example, punched metal) 10. FIG. 7 shows a perspective view of the porous body 10.
The hole diameter of the perforated plate 10 is such that the passage of the medium 7 can be prevented. The front chamber 3a and the rear chamber 9b are separated by a partition wall 1.
It is divided by 1. Note that the perforated plate 10 is held at one end by the partition wall 11. A medium passage blocking body 12 is provided between the rear chamber 9b and the inside of the container 1, and the medium passage blocking body 12 is inserted through a cylindrical portion that is brought into sliding contact around a rotating shaft that passes through the inside of the rear chamber 9b. It is connected to the outside outside the rear chamber 9b, and is connected to the position adjustment means 13 by a screw.
Note that 14 is a position fixing nut connected to the screw. By operating the position adjusting means 13, the blocking body 12 is moved along the rotating shaft 2, and the distance between the blocking body 12 and the partition wall 11 can be adjusted. 15,1
Reference numeral 6 denotes a retainer for the position adjusting means 13 to come off. 17 is an O-ring provided between the blocking body 12 and the outer wall 18, and 19 is an O-ring provided between the blocking body 12 and the rotating shaft 2. The front chamber 9a and the rear chamber 9b are provided with a dispersion liquid outlet at the lower part, and a shutter 20 is attached below the outlet.

A cooling water passage 2 is provided in the cylindrical outer peripheral wall of the dispersion container 1.
1 is formed, and 22 and 23 are cooling water inlet and outlet, respectively. Further, 24 and 25 are a dispersion medium inlet and an outlet, respectively.

When using the above-mentioned dispersion device, first, an appropriate amount of dispersion medium 7 is introduced into the dispersion container 1 from the dispersion medium input port 24 (of course, the dispersion medium 7 is poured into the dispersion medium outlet 25).
), close the inlet, and close the cooling water passage 2.
The mill base is fed into the container 1 from the mill base feeding part 8 while passing cooling water through the mill base 1. At the same time, the rotating shaft 2 is rotated by the driving means 3, and the disk 4 is rotated.
and rotate the screw 5. At this time, the rotating shaft 2 is driven so that the direction of propulsion of the screw 5 is directed toward the mill base feeding section 8. Further, by operating the position adjustment means 13, a gap is formed between the medium passage blocking body 12 and the partition wall 11 to the extent that the passage of the medium can be blocked. The mill base and medium 7 in the container 1 are stirred and moved circumferentially by the disc 4 and linearly moved back towards the mill base inlet 8 by the screw 5. This action of the screw 5 acts more effectively on the medium 7 than on the mill base and thus prevents the medium 7 from proceeding towards the dispersion outlet 9 and prevents the medium 7 from entering the dispersion vessel. Make it almost uniformly distributed. Therefore,
The medium 7 is not collected and retained on the dispersion liquid discharge side, and furthermore, the relative momentum between the mill base and the medium 7 is increased, so that the dispersion efficiency is improved. Part of the dispersed liquid enters the front chamber 9a through the porous body 10, and the other part enters the rear chamber 9b through the gap between the blocking body 12 and the partition wall 11. Front room 9
The dispersion liquids in the rear chambers 9a and 9b are taken out from their respective outlets to the shutter 20 and recovered. In this device, the dispersion liquid discharge section 9 is open to external pressure, so the pressure in the container 1 near the discharge section does not increase much, and therefore the sealing mechanism in the discharge section 9 is relatively simple. That's fine. Furthermore, in this device, the dispersion liquid from the container 1 is discharged into the front chamber 9a and the rear chamber 9b through a relatively large liquid passage area, so that the medium 7 and the dispersion liquid can be smoothly separated. It can be done.

〔Effect of the invention〕

As described above, according to the dispersion device of the present invention, good dispersion efficiency can be obtained with a relatively simple mechanism.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the dispersing device of the present invention, FIGS. 2 and 3 are perspective views of the disk, and FIG.
6 and 5 are perspective views of the screw.
The figure is a perspective view of the collar, and FIG. 7 is a perspective view of the porous body. DESCRIPTION OF SYMBOLS 1... Dispersion container, 2... Rotation shaft, 4... Disk, 5... Screw, 6... Collar, 7... Dispersion medium, 8... Mill base feeding part, 9... Dispersion liquid discharge part, 9a ……Anterior chamber, 9b……Back chamber, 10……
Porous body, 11... Partition wall, 12... Medium passage blocking body, 13... Position adjustment means, 17, 19... O-ring.

Claims (1)

[Claims] 1. A device for colloidally dispersing a suspension of solid particles, wherein the inner surface of a dispersion container is cylindrical, and a drive rotation shaft is provided in the container at the axis of symmetry of the cylindrical shape. A flat disk and a screw are attached to the drive rotation shaft, and a dispersion medium can be charged into the dispersion container, and the container has a screw at one end along the rotation shaft. A suspension feeding section is attached, and a dispersion liquid discharging section is attached to the other end, and the propelling direction of the screw is directed toward the suspension feeding section. Dispersion device. 2. The dispersion device according to item 1, wherein the dispersion container has a horizontal cylindrical shape. 3 The dispersion liquid discharge part has a front chamber and a rear chamber, the front chamber is separated from the dispersion container inside thereof by a cylindrical porous body for preventing passage of the dispersion medium, and the rear chamber is connected to the rotation axis. A medium passage blocking body is disposed along the front chamber and is disposed along the partition wall between the front chamber and the rear chamber, and is capable of adjusting the size of the gap between the rear chamber and the dispersion container by moving along the rotation axis. 1. The dispersion device according to item 1, wherein the front chamber and the rear chamber are each provided with a dispersion liquid outlet.