JPH07100352A - Dispersion device - Google Patents

Abstract

PURPOSE:To provide a dispersion device enabling to mix and disperse with high accuracy and also having high producibility and a simple structure. CONSTITUTION:The device has a long flat passage from an inlet 2A toward an outlet 3A between a rotor 3 and a stator 2, and it is constituted so as to mix and disperse desired solid particles into a fluid to be dispersed passing through the flat passage with a rotating operation of the rotor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispersion device for mixing and dispersing desired solid particles in a fluid to be dispersed, such as a suspension of solid particles of paint, ink, ceramics, slurry and the like. Is.

[0002]

2. Description of the Related Art Heretofore, media-using type dispersing devices such as "ball mill", "sand mill", "centry mill" and "attritor" have been known as a manufacturing device for such paints and inks. Has been. In this device, steel balls, ceramic balls, glass beads, etc. are used as the medium, and when the fluid to be dispersed, the solid particles and the stirring blades rotate, or the container itself rotates, collision and friction are repeated. , Mixed and dispersed.

Here, the problem is "ball mill".
In other dispersion devices, usually premix (solid particles and liquid, that is, the fluid to be dispersed is stirred and mixed in advance)
, And another device for it must be provided. In addition, when the above medium is agitated, it is unavoidable that the abraded material is mixed into the fluid to be dispersed due to the abrasion of the medium itself, the inner surface of the container, or the surface of the stirring blade. Further, it takes time and cost to replace the medium and parts due to abrasion damage.

Dispersing devices such as "high speed dissolver" and "homogenizer" which do not use the above-mentioned medium are also known. In this case, the former is sheared by a high speed rotating stirring blade. Since they are mixed, a high degree of dispersion cannot be expected. In the latter case, the ultra-high speed stirring blade is passed through a highly precise clearance gap to mix and disperse by the action of shearing, cavitation, etc., so that it generates a lot of heat and is not suitable for those that deteriorate in temperature. It is not suitable for processing, long-time processing, and those requiring high dispersity.

In addition to the above, "colloid mill" and "3
The "roll mill" is known, but in the former, a premixed object to be treated (fluid to be dispersed and solid particles) is placed between the stator at the upper part of the apparatus and the rotor at the lower part. It is intended to be dropped into a configured dispersion area and to be subjected to dispersion processing. As described above, not only an apparatus for premixing is separately required, but also the time for which the object to be processed passes through the dispersion area is short. Therefore, even if this is repeated several times, the degree of dispersion does not increase so much and is not suitable for high-level dispersion. The latter is 3
Rotate the book roll in different directions at different speeds,
The premixed object is hung in the valleys between the rolls, and it mixes and disperses due to the shearing force between the rolls and the stress generated during rubbing. Skilled, dangerous to work, unmanned, not suitable for automation. In addition, since the apparatus itself is an open type, it is not suitable for an object to be treated containing a volatile component in terms of working environment and yield.

[0006]

Therefore, conventionally,
The development of an efficient dispersion device that can perform mixing and dispersion with sufficiently high accuracy without premixing and without using media such as steel balls has been awaited.

[0007]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and an object of the present invention is to provide a dispersing device having a simple structure capable of highly accurate mixing / dispersion and high productivity. is there.

[0008]

Therefore, in the present invention,
Between the rotor and the stator, or the first rotor
A second rotor which rotates in the opposite direction to the rotor and the rotor.
A long flat path from the inlet to the outlet is formed between the rotor and the rotor, and the desired solid particles are mixed / dispersed in the fluid to be dispersed passing through the flat path by the rotation operation of the rotor. It is configured to

[0009]

As described above, while the object to be treated (fluid to be dispersed and solid particles) passes between the flat paths, between the rotor and the stator, or between the rotor. By the sliding operation of, that is, the solid particles secondary agglomerated by the action of shearing force, shear stress, etc. are decomposed into primary particles or a state close to them, and mixing / dispersion of the object to be treated can be efficiently achieved.
This doesn't necessarily require a premix, and
There is also an advantage that no medium such as steel balls is used.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the illustrated embodiments. In FIG. 1, reference numeral 1 is a container for accommodating an object to be treated in which desired solid particles, for example, pigments are put in a fluid to be dispersed, in which a rotor-3 and a stage according to the present invention are contained. -T-2 is arranged at an arbitrary position where it is immersed in the object to be processed. In particular, in this embodiment, the container 1 is provided with the jacket 4 to prevent the temperature rise due to the heat generation of the contents.

The rotor 3 is disk-shaped and is attached to the lower end of a rotating shaft 9 that descends vertically into the container 1. Then, in the state where they are arranged concentrically with this,
Ta-2 is a donut disk whose upper surface is a mortar-shaped inclined surface and which has a circular entrance 2A in the center and which has a reverse mortar shape partly diverting from the entrance 2A to the lower surface. The other part of the lower surface of the rotor 3 is in surface contact with the upper surface of the disk-shaped rotor 3 or is in surface contact with the surface of the rotor 3 which is extremely close to it. The column 8 that supports the above-mentioned stator-2 is
Suspended at the top.

If necessary, the lower surface of the stator-2 may be pressed against the upper surface of the rotor-3 by the weight of the stator.

Then, the rotor 3 is rotated in the liquid to be treated in the container 1, and the solid particles are supplied thereto little by little. This corresponds to the outer peripheral portion of the rotor 3 from the inlet 2A through the flat path extending between the stator 2 and the rotor 3 and extending in the radial direction of the both. The object to be treated is rubbed up to the exit 3A. Moreover, in this embodiment, the centrifugal force generated by the rotation of the rotor-3 causes the object to be processed to be forcibly fed in the radial direction via the upper surface of the rotor-3.
In this way, the objects to be treated are allowed to flow (convection) in the container as indicated by the arrows in the drawing, while being mixed and dispersed in the flat path.

The container 1 of the above embodiment is provided with an opening / closing valve 5 for letting out the mixed / dispersed contents from the bottom. Further, a pivot shaft 6 for discharging the contents by falling may be provided.

In the embodiment shown in FIG. 2, the container 1 has a structure with casters, and the device frame 7 for rotatably supporting the rotary shaft 9 is a hydraulic means (for example, a piston / cylinder mechanism). It is possible to move up and down through 10 so that the rotor and the stator can be stopped at arbitrary positions in the container. An electric motor M is mounted on the apparatus frame 7 so that power is transmitted to the rotary shaft via a belt transmission system 7A. The column 8 is fixed to the apparatus frame 7 with a fixing nut 21 or the like. If necessary, the container 1 may be provided with a lid 22 except for a portion into which a rotor, a stator, etc. are inserted. In this case, it is possible to prevent evaporation and emission of volatile components contained in the processing liquid, and protect the working environment.

Further, in the embodiment shown in FIG. 3, the rotor-3 is supported so as to be vertically slidable on the lower end of the rotary shaft 9 (in the rotating direction, it is locked by using a key or the like). However, it is configured to be held by a holding mechanism 12 such as a coil spring. In addition, here the nut 13
Acts as a spring seat for the above spring,
A spacer 11 for regulating the thickness of the flat path is provided between the step portion of the rotary shaft 9 and the rotor-3. Further, as shown in FIGS. 3 to 5, wear-resistant steel, on the rubbing surfaces of the rotor-3 and the stator-2,
A wear-resistant material 14 such as a sintered metal or ceramic is preferably equipped. Alternatively, the thickness of the flat path may be adjusted by adjusting the height of the column 8 by adjusting the fastening of the fixing nut 21.

In the embodiment shown in FIG. 6, a groove 15 extending in the radial direction is formed at the rubbing surface of the rotor-3. The shapes and directions of these grooves are (a) to (h) in FIG. 7 (however, (b) shows the state without grooves)
Are partially shown (two planes of four divisions each). Further, in this embodiment, the groove 15 is provided only on the rotor-3 side, but it goes without saying that it may be provided on the stator-2 side or on both sides. By forming such a groove, it is possible to increase the passing amount of the object to be processed and shorten the processing time.

The embodiment shown in FIG. 8 shows a modified example in which the stators 2 and 2'are provided corresponding to the upper and lower surfaces of the rotor-3. In addition, the embodiment shown in FIG.
A modification in which the combination of 3 and the stator 2 is provided in multiple stages in the longitudinal direction of the rotary shaft 9 is shown.

Further, in the embodiment shown in FIG. 10, instead of the stator-2 of the above embodiment, a second rotor-2 "of the same shape is used.
Is coaxially mounted with the first rotor-3 and is rotatable in the opposite direction. For this purpose, the support column 8 is attached to the rotary frame 7B, and this rotary frame 7B is provided by another electric motor M'provided on the apparatus frame 7 and the gear train 1 is provided.
It is adapted to be rotationally driven via 6 and 17. The second rotor-2 may be rotated in the same direction as the first rotor-3 while changing the rotation speed.

Further, in the embodiment shown in FIG.
The blades 20 are provided on the lower surface of the rotor 3 so as to fulfill the role of stirring for ensuring the flow convection of the object to be treated in the container 1.

[0021]

The present invention has been made as described above in detail.
Between the rotor and the stator, or the first rotor
A long flat path from the inlet to the outlet is formed between the first rotor and the second rotor, and the desired fluid to be dispersed that passes through the flat path is rotated by the rotation operation of the rotor. Since the solid particles are mixed and dispersed, while the object to be treated (fluid to be dispersed and solid particles) passes between the flat paths, the rotor and the stator are mixed.
It is possible to efficiently mix and disperse the object to be processed to a high degree of dispersion by the sliding operation between the rotor and the rotor, which does not require premixing. There is also an advantage that no medium such as steel balls is used.
Further, since high-speed rotation is not required, there is no local heat generation, which is advantageous in adopting this apparatus for a temperature-degradable object. Furthermore, since it is a simple mechanism, no skill is required to control the device, and unmanned operation and automation can be easily performed.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional front view for explaining an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing the overall configuration.

FIG. 3 is a vertical cross-sectional side view illustrating the configuration of the rotor in the embodiment.

FIG. 4 is a plan view of the rotor.

FIG. 5 is a bottom view of a stator corresponding to the rotor.

FIG. 6 is a vertical cross-sectional side view illustrating the configuration of a rotor according to another embodiment.

FIG. 7 is a plan view illustrating the shape and direction of the groove in the above embodiment.

FIG. 8 is a vertical cross-sectional side view illustrating the configuration of yet another embodiment.

FIG. 9 is a vertical sectional side view which also illustrates the configuration of another embodiment.

FIG. 10 is a vertical sectional front view of another embodiment of the present invention.

FIG. 11 (1) and (2) are rotors of another embodiment.
FIG. 3 is a vertical side view and a bottom view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 container 2 stator 2A inlet 3 rotor 3A outlet 4 jacket 5 on-off valve 6 pivot shaft 7 device frame 8 column 9 rotating shaft 10 hydraulic means 11 spacer

Claims (5)

[Claims] 1. A long flat path extending from the inlet to the outlet is formed between the rotor and the stator, and the rotor is provided.
The desired solid particles are mixed / dispersed in the fluid to be dispersed that passes through the flat path by the rotating operation of. 2. The rotor and the stator are substantially in surface contact with each other or in a face-to-face relationship in which the rotor and the stator are very close to each other, and rotation of the rotor causes the fluid to be dispersed in the flat path. And configured to forcibly feed solid particles.
Dispersion device according to. 3. A groove line for the flat path is formed on at least one of the contact surface and the facing surface of the rotor and the stator. Dispersion device as described. 4. The surface pressure is applied so that the fluid to be dispersed and the solid particles in the flat path are subjected to a compression action between the rotor and the stator. The dispersion device according to claim 1. 5. A long flat path extending from the inlet to the outlet is formed between the first rotor and the second rotor rotating in the opposite direction to the rotor. Then, a dispersing device characterized in that desired solid particles are mixed and dispersed in the fluid to be dispersed which passes through the flat path by rotating the both rotors.