JPH0545384Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a medium dispersion machine that uses a medium such as beads to disperse a processed material.

(Prior art and problems) A dispersing machine that rotates a disk in a processing tank to disperse the material to be processed by the medium applies centrifugal force to the mixture of the medium and the material by rotating the disk, It is thought that the material is made to flow between disks, applying shearing force to the object to be processed and dispersing it into fine particles. However, the flow of such a mixture is not uniform, causing short passes and dead spaces in the flow of the medium, making it difficult to apply a uniform shearing force throughout the treatment tank, and the treatment must be repeated several times. It was hot. Furthermore, when the media collides with the disks and walls of the processing tank, they are abraded, shortening the life of the machine, and in addition, abraded metal pieces may be mixed into the processed material, causing inconvenience.

(Issues to be solved by the invention) The purpose of the invention is to give positive movement to the medium in the processing tank to make the flow uniform, to apply a uniform shearing force to the objects to be processed, to enable efficient dispersion, and to avoid wear and tear. The aim is to provide a media dispersion machine that can be used for a long period of time.

(Means for Solving Problems) According to the present invention, the above object is to provide a rotating cylinder in the processing tank so as to form a narrow processing space between the tank wall and the outer peripheral surface of the rotating cylinder and/or the inside of the tank wall. This is achieved by a media dispersing machine characterized in that a recess is formed on the circumferential surface and the tank wall and rotary cylinder of the processing tank are made of a wear-resistant material.

(Example) This will be explained below along with examples.

Although the figure shows an embodiment in which the present invention is applied to a horizontal media dispersion machine, the present invention can also be applied to a vertical media dispersion machine. A rotary cylinder 4 is rotatably provided so as to form a narrow processing space 3 in which the object to be processed and the medium circulate. Although the rotary cylinder 4 is formed in a cylindrical shape, it may be formed in a polygonal cylinder shape such as a substantially triangular or substantially square cylinder, or an elliptical cylinder instead of a cylinder.
Preferably, the end face is formed into a conical surface 5 to guide the mixture of the object to be processed and the medium into the processing space, and the inner surface of the cylinder wall is formed with a flow path 6 through which cooling water or other temperature regulating fluid flows, and a driving It is supported on a shaft 7 (Fig. 2).

The processing tank 1 has a jacket 8 around which a temperature regulating fluid such as cooling water flows, a supply port 9 for the material to be processed is formed at one end, and a medium separation device such as a screen or a gap separator is formed at the other end. A discharge port 10 is provided via means (not shown). Media can be glass beads, ceramics, alumina, or
A medium made of zirconia, steel, or other appropriate material, and placed in an appropriate amount in the treatment tank (not shown)
is taken out from the extraction port 11.

The processing space 3 is formed to have an appropriate width depending on the size of the medium, but is formed to have a width equal to at least four mediums so as not to impede the operation of the rotary cylinder.

A concave portion extending in the axial direction is formed on the outer circumferential surface of the rotary cylinder 4 and/or the inner circumferential surface of the tank wall 2 of the processing tank to promote movement of the medium supplied to the processing space. Although facing upstanding surfaces are provided, a recess extending in the circumferential direction may be formed as described later. Although the recessed portion is formed by machining after the cylindrical rotary cylinder is made, it may also be formed by a lost wax method or other casting method. Note that it is also possible to provide a ring-shaped member having a recess formed on its surface and fit it around the outer periphery of the cylindrical body (not shown). The shape of the recessed portion can be made into various shapes. In FIGS. 1 to 3, the recess 12 is a substantially U-shaped groove extending in the axial direction, but it may also have a groove shape such as an involute tooth profile or a serration, or it may have a groove shape extending toward the center as shown in FIG. 4. It is also possible to form a substantially L-shaped cut by providing a bottom side 14 extending rearward in the rotational direction (arrow) from the base end of the side side 13. The above-mentioned recesses are provided in the axial direction at almost right angles to both end edges of the rotary cylinder, but they may be formed into oblique annular grooves that are inclined in the axial direction like the grooves of a helical gear, or they may be continuous in the axial direction. However, as shown in FIG. 5, the recesses 15 extending in the circumferential direction may be provided at appropriate intervals to be divided into a plurality of zones and formed discontinuously. In this case, the direction of the bottom side 14 of the approximately L-shaped notch as shown in FIG. It is also possible to change the values in adjacent districts.

In the above-described embodiment, the recess is provided only on the outer periphery of the rotary cylinder, but as shown in FIG. 6, the recess may be provided on both sides of the rotary cylinder and the tank wall. In the figure, the rotary cylinder 4 is provided with recesses 12 and 15 in the axial and circumferential directions so that tooth-shaped protrusions 16
... are arranged vertically and horizontally. on the other hand,
The tank wall 2 has a portion facing the protrusion 16,
A recess 17 extending in the circumferential direction is formed. In this way, the processing space 3 has a substantially uniform width in the axial direction, and its diameter intermittently widens at the portions corresponding to the projections 16.

The tank wall and rotary cylinder of the treatment tank are made of wear-resistant material. To make it from a wear-resistant material, ceramic can be attached, or the tank wall and rotary cylinder can be made of a superhard material such as tungsten carbide or ceramic. In addition, it is possible to provide a layer made of a wear-resistant material on the surface without making the entire body from such a wear-resistant material, or to use a superhard material such as tungsten carbide or ceramic on the inner surface of the tank wall and the outer surface of the rotating cylinder. Explosion type (deflagration type) thermal spraying or plasma spraying is performed to form a thermal spray coating layer 1 with an appropriate thickness, for example, 100μ or more.
8 (Figure 7).

In use, the material to be processed is supplied into the processing tank 1 from the supply port 9 at an appropriate feeding pressure by a pump (not shown), and is mixed with a medium (not shown) stored in the tank and then transferred to the processing space. 3.
Then, due to the rotation of the rotary cylinder, the medium circulates around the rotary cylinder as if in a plug flow shape, and at this time, the medium is moved to the opposing wall surface by the upright surface forming the recess formed in the wall surface forming the processing space. They actively move toward the destination, and their movement is encouraged.
Therefore, since there is no dead space and no shot path occurs, the shearing force applied by the medium to the object to be processed acts uniformly, and the object to be processed is reliably dispersed into fine particles and discharged from the discharge port.

(Effects of the invention) Since the invention is constructed as described above, the objects to be processed are subjected to almost uniform shear force from one end of the processing tank to the other, and are uniformly dispersed, resulting in extremely sharp particle size distribution. The dispersion efficiency can be improved, and since the inner surface of the tank wall and the outer surface of the rotating cylinder are made of wear-resistant material, the upright surface of the recess and the rotating cylinder that move the medium and the material to be processed in the circumferential direction can be improved. Wear on the outer surface of the machine is reduced, extending the life of the machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along line A-A in FIG. 6 and 6 are cross-sectional views of modified examples, and FIG. 7 is an enlarged cross-sectional view of a part of the rotary cylinder. 1... Processing tank, 2... Tank wall, 4... Rotating tube, 1
8...Thermal spray coating layer.

Claims (1)

[Claims for Utility Model Registration] 1. A rotating cylinder is provided in the processing tank so as to form a narrow processing space between the tank wall and the object to be processed and the medium circulating, and the outer circumferential surface of the rotating cylinder and/or the tank wall A recess is provided on the inner circumferential surface of the rotary cylinder to form an upright surface facing in the circumferential direction of the rotary cylinder, and the tank wall of the processing tank and the surface of the rotary cylinder are made of a superhard material such as tungsten carbide or ceramic. media dispersion machine. 2. The medium dispersion machine according to claim 1, wherein the superhard material is thermally sprayed on the inner surface of the tank wall of the processing tank and the outer surface of the rotating cylinder to form a thermal spray coating layer.