JPH0565214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a media dispersing machine that is capable of efficiently crushing, dispersing, etc. processing materials by circulating media.

A medium such as a ball or bead is placed in a processing tank and a disk or the like is rotated to give motion to the medium.
A media dispersion machine is used that crushes and disperses the processing material stored in a processing tank.
With conventional products, shear stress acts strongly on the material to be processed in the vicinity of the disk, etc., but the force weakens when the disk is far away, resulting in uneven distribution of shear stress, and when miniaturized, shear stress acts on the material. Some processes became shorter and less efficient.

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.

In the figure, a rotating body 2 is rotatably provided in the processing tank 1, and the rotating body is formed into a cylindrical shape, but it can also be formed into a polygonal cylinder such as a hexagonal cylinder or other cylindrical shape. . A forward screw 3 for advancing the media on the outer and inner surfaces of the rotating body;
A retracting screw 4 for retracting the screw 3 and the reverse screw is formed. 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. It is preferable that the screw formed on the inner surface has a larger lead and the number of threads than the screw formed on the outer surface so that the amount of movement of the media is almost 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.
The size is set appropriately considering the size of the media. The thread of the screw is formed into a square thread in the figure, but it can also be used as a trapezoidal thread, a sawtooth thread, or a trapezoidal thread.
It can also be formed into a round thread, triangular thread, etc.Although the threaded part is formed integrally with the rotating body, it is also possible to form it in a separate cylindrical frame and attach it to the rotating body. It is also possible to make wings and fix them (not shown).

A cylindrical partition wall 6 made of a non-magnetic material is formed inside the rotating body 2. A shaft 7 is provided inside the partition wall 6. The shaft 7 is rotatably supported by a main body 8 provided at one end of the processing tank 1 with bearings 9 and 10, and is rotated by a motor 14 via pulleys 11 and 12 and a belt 13.

The shaft 7 and the rotating body 2 are magnetically coupled by a permanent magnet. That is, a permanent magnet 19 is provided on the rotating body 2, and another permanent magnet 16 is fixed to the shaft 7. As a result, the rotating body 2 rotates as the shaft 7 rotates. Also, rotating body 2
The longitudinal positioning of the magnet is also performed by the permanent magnet. Note that the rotating body is also formed of a nonmagnetic material.

A bearing 17 made of Teflon, ceramic, etc. is provided on the outer periphery of the partition wall 6, but this bearing can also be omitted. A supply port 19 for the processing material is provided at one end of the processing tank 1, and an outlet 21 is provided at the other end through a screen 20. In addition,
A gap separator may be used instead of the scree. A jacket 22 is formed around the outer periphery of the processing tank 1, through which water, air, or other temperature regulating medium for cooling or heating the processing material flows.
The jacket is provided with an inlet 23 and an outlet 24.

When the rotating body 2 is rotated by the shaft 7, 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 along the screw groove to the right end of the advancing screw. The media and materials sent to the right in the drawing by the forward screw 3 enter the inside of the rotating body 2, and are sent to the left by the backward screw 4. The media that came off the backward screw 4,
It flows out to the left of the rotating body 2 and is circulated to the right by the forward screw 3 again. The processing material thus pulverized and dispersed is transferred to the separator 2.
0, flows out from the outlet 21, and is sent to the next process.

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

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 material to be processed can be prolonged. Since the shaft and the rotary body are magnetically coupled and rotated, the diameter of the rotary body can be increased, and the processing process using the screw can be lengthened accordingly, making it possible to downsize compared to conventional systems. Therefore, when the filling rate of the media is the same, the filling amount of the media can be reduced compared to the conventional method, and the efficiency can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a partially omitted sectional view and FIG. 2 being a side view of a rotating body. DESCRIPTION OF SYMBOLS 1... Processing tank, 2... Rotating body, 3... Forward screw, 4... Reverse screw, 7... Axis, 1
5,16...Permanent magnet.

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, a partition is formed of a non-magnetic material inside the rotating body, and a shaft is provided inside the partition, A permanent magnet is formed on the shaft and the rotating body so as to magnetically couple the shaft and the rotating body, and the rotating body is rotated by the rotation of the shaft, and the media stored in the processing tank is moved along the screw. A media dispersion machine that circulates between the outside and inside of a rotating body to crush and disperse materials.