JPH0362449B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a media dispersion machine that enables efficient pulverization and dispersion processing.

Conventional media dispersing machines, in which the media is placed in a processing tank and a disk or the like is rotated to give motion to the media to crush and disperse the material, can cause shear stress on the material to be processed in the vicinity of the disk, etc. Although they act strongly, the force weakens when they are separated, and the distribution of shear stress is uneven.Furthermore, when miniaturized, the process in which shear stress acts becomes shorter, resulting in some inefficiencies.

In the present invention, screws are provided on the outer and inner surfaces of a cylindrical rotating body, the screws give motion to the media, and the media are moved in circulation, and the processing material is passed through the screws, thereby creating a speed difference between the media in the process. This relates to a media dispersion machine that performs pulverization and dispersion processing using shear stress generated by.

This will be explained below along with examples.

FIG. 1 shows an embodiment in which a motor is used as a drive source for a rotating body. Processing tank 1
A rotating body 2 is rotatably provided therein, and although the rotating body is formed into a cylindrical shape, it may also be formed into a polygonal cylinder such as a hexagonal cylinder or other cylindrical shape. A forward screw 3 for advancing the media and a backward screw 4 for retracting the screw 3 are formed on the outer and inner surfaces of the rotating body. In the figure, the screw direction is determined so that the outer surface is the forward screw 3 and the inner surface is the backward screw 4, taking into consideration the rotational direction of the rotating body. The sides may be used as forward screws. In addition, the screw formed on the inner surface has a larger lead than the screw formed on the outer surface, and has a larger number of threads.
It is preferable that the amount of movement of the media be approximately balanced between the inner and outer surfaces. The distance between the screw and the inner wall 5 of the processing tank, the pitch of the screw, etc. are set to appropriate sizes in consideration of the size of the media. The thread of the screw is formed into a square thread in the figure, but it can also be formed into a trapezoidal thread, serrated thread, round thread, triangular thread, etc., or it may be formed integrally with the rotating body on the threaded part. However, it may be formed in a separate cylindrical frame and attached to the rotating body, or screw-shaped wings may be made and fixed (not shown). A support cylinder 6 is inserted through the inside of the rotating body 2, and the support cylinder and the rotating body are connected by an arm 7. The arm 7 is provided so that the positions of the front and rear end surfaces are shifted and the side surfaces are inclined so as to facilitate the insertion and removal of the media when the arm 7 is rotated (dotted lines in FIG. 1 and FIG. 2). The support tube 6 is fitted onto a shaft 8 driven by a motor (not shown), and is fixed to the shaft 8 with a mounting screw 9 or the like. An outflow port 11 is formed on the outer periphery of the proximal end of the shaft 8 via a media separator 10, but the outflow port may be provided at any other suitable position. The processing tank 1 is provided with a supply port 12 for processing materials and an outlet for media (not shown), and is surrounded by a jacket for water, air, or other temperature regulating media for cooling or heating the processing materials. An inflow port 14 and an outflow port 15 are provided to allow the flow to flow to the flowchart 13.

When the rotating body 2 is rotated by the shaft 8, the media (not shown) filled in the tank are rotated.
is conveyed to the right in the figure within the narrow groove of the advancing screw 3, and the movement of the media crushes and disperses the material to be treated. This process continues continuously until the right end of the forward screw. forward screw 3
Accordingly, the media and materials sent to the right in the figure enter the inside of the rotating body 2 through the opening 16 between the arms 7, and are sent to the left by the backward screw 4. The media that has come off the backward screw 4 flows out to the left of the rotating body 2 through the opening 17 between the arms on the left side of the figure, and returns to the forward screw 3.
It circulates to the right. The treated material thus pulverized and dispersed passes through the separator 10, flows out from the outlet 11, and is sent to the next step.

Although the processing tank, rotating body, etc. described above are of horizontal type, they can also be of vertical type.

3 to 6 show embodiments in which a rotating body is directly driven by a rotating magnetic field generated by rotating a permanent magnet or by an electromagnetic coil.

In FIG. 3, an electromagnetic coil 18 is provided outside the inner wall 5 of the processing tank 1 to generate a rotationally moving magnetic field. An appropriate number of electromagnetic coils may be provided depending on the size of the rotating body 2. The entire rotating body 2, at least the portion facing the electromagnetic coil 18, is made of iron, silicon steel, amorphous metal, or other suitable conductive material so as to be rotated by the electromagnetic induction action of the electromagnetic coil. A forward screw 3 and a backward screw 4 are provided on the outer and inner surfaces of the rotating body 2, and a temperature control pipe 19 through which a temperature control medium such as a refrigerant flows is provided inside. Also provided outside the processing tank 1 are a jacket 20 for a refrigerant such as water or air for cooling the electromagnetic coil, and a jacket 21 for adjusting the temperature inside the tank. A supply port 12 for the processing material is provided on one side of the processing tank, and a supply port 12 for the processing material is provided on the other side.
An outlet 11 is formed through a separator 10, and the whole is provided in a hermetically sealed manner.

The rotating body 2 is placed in a free state in the tank, but when the electromagnetic coil 18 is excited, it begins to rotate under the effect of electromagnetic induction due to the rotationally moving magnetic field of the electromagnetic coil. Due to the rotation of the rotating body 2, the forward screw 3 and the backward screw 4,
The processing material and media (not shown) circulate along the outer and inner surfaces of the rotating body along the grooves of the screw, and the processing material is crushed and dispersed and taken out from the outlet 11.

In the above embodiment, the electromagnetic coil is provided close to the outside of the rotating body, but it can also be provided inside the rotating body.

The embodiment shown in FIG. 4 has almost the same structure as the embodiment shown in FIG.
differs in that it includes a separator 10 connected to the temperature control pipe 19.

The embodiment shown in FIG.
This device is similar to the embodiment shown in FIG. 4, except that it is provided on the same side as the outlet 11. However, in Fig. 5, the processing material, etc. is
The forward screw 3 provided on the outer surface of the rotating body 2 determines the screw direction of the forward screw 3 so that it advances to the left in the figure, and the material to be processed that reaches the left side is moved by the backward screw 4 provided on the inner surface of the rotating body 2. The screw direction is set so that it goes to the right. Further, the right edge 22 of the rotating body 2 extends inward so that the processing material flowing in from the supply port 12 does not flow directly into the outlet 11.

In the embodiments shown in FIGS. 3 to 5 above, the rotating body is
In a stationary state, the media may be in contact with the inner wall of the tank, but when it begins to rotate due to electromagnetic induction, the media enters between the screw on the outer surface and the inner wall, allowing smooth rotation. In addition, if there is a risk that the rotating body may be biased due to the difference in thrust caused by the screws provided on the outer and inner surfaces of the rotating body, the number of threads of the screws provided on the inner surface is greater than that of the screws provided on the outer surface. It is recommended to increase the surface area of the

In the embodiment shown in FIG. 6, a rotating body is rotated by a rotationally moving magnetic field, and the rotating body is supported by a magnetic bearing. That is, permanent magnets 23 are provided at both ends of the rotating body 2, and other permanent magnets 24 are provided on the temperature control pipe 19, the end plate of the processing tank 1, etc. so as to face the permanent magnets and levitate the rotating body. In this way, since the rotating body 2 is supported at a fixed position in the tank, it rotates more smoothly due to the rotating magnetic field generated by the electromagnetic coil 18, and the forward screw 3 and the backward screw 4 move the processing material and media to the rotating body. It can be circulated to the outer and inner surfaces of the container for pulverization and dispersion treatment.

The present invention is constructed as described above, and the screw gives motion to the medium and causes it to move. Therefore, the medium moves within the relatively narrow groove of the screw, and the distribution of shear stress becomes almost uniform.
In addition, since the media circulates along the screws provided on the inner and outer surfaces of the rotating body, the process of crushing and dispersing the processing material can be extended, and the size can be reduced compared to conventional ones. The filling amount can also be reduced compared to the conventional one when the filling rate is the same, and efficiency can be improved.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, in which Fig. 1 is a partially omitted sectional view of the basic media dispersion machine of the present invention, Fig. 2 is a side view of a rotating body, and Figs. 3 to 6 are a rotating body. FIG. 2 is a cross-sectional view of a medium dispersion machine of the present invention in which a rotating body is rotated by a moving magnetic field. 1... Processing tank, 2... Rotating body, 3... Forward screw, 4... Reverse screw, 18... Electromagnetic coil.

Claims (1)

[Claims] 1. A cylindrical rotating body is rotatably provided in the processing tank,
A forward screw for advancing the media and a retracting screw for retracting the media are formed on the outer and inner surfaces of the rotating body, and as the rotating body rotates, the media is circulated along the screws to the outside and inside of the rotating body, and the material is A media dispersion machine designed for pulverization and dispersion processing. 2. The rotating body is made of a conductive material, and the rotating body is rotated by electromagnetic induction by an electromagnetic coil that generates a rotationally moving magnetic field provided close to the rotating body. Media disperser. 3 The screw provided on the inner surface of the rotating body is
The medium dispersion machine according to claim 1 or 2, wherein the medium dispersion machine is formed with a reed larger than the screw provided on the outer surface. 4. The medium dispersion machine according to any one of claims 1 to 3, wherein the temperature in the processing tank is adjusted by a temperature regulating medium flowing inside the rotating body.