JPH03217253A - Rocking type dispersing/grinding device - Google Patents

Abstract

PURPOSE:To enable fitting of a large treatment vessel and to reduce the number of parts by supporting a rocking plate fitted with the treatment vessel by a plurality of pieces of eccentric axles and rotatably driving at least one piece of eccentric axle selected from among these axles. CONSTITUTION:This device is provided with a treatment vessel 4 into which the material to be treated and a dispersing or grinding medium are introduced, a rocking plate 6 fitted with the treatment vessel A and a plurality of pieces of eccentric axles 9, 13, 13' which support the rocking plate 6 and also revolve and turn it along a circular orbit. The rocking plate 6 is supported only by these eccentric axles 9, 13, 13'. At least one piece of eccentric axle 9 selected from the eccentric axles is driven. The other eccentric axles 13, 13' are followed and the rocking plate 6 is revolved along the circular orbit having radius epsilon. Thereby the material to be treated is subjected to dispersion treatment or to grinding treatment by rotary movement and turning movement of the medium. As a result, installation of the large treatment vessel is enabled and also the number of parts is reduced.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention involves rotating a processing container into which a material to be processed and a dispersing or grinding medium are charged, along a circular orbit, so that the material to be processed inside is A rocking type dispersion system that disperses or crushes
It is installed between the crushing equipment. [Prior technology] In addition to efficient pulverization of coal, water slag, silica sand, etc., this technology is particularly aimed at producing raw materials for new ceramic materials, raw materials for electronics devices, and submicron-sized substances for various fine chemistry applications. The development of fine grinding or ultrafine grinding equipment has become an important goal in various fields. On the other hand, as particles become finer, techniques for uniformly dissolving and dispersing these fine powders in liquids, and for crushing and dispersing fine powders that tend to aggregate together, are being developed in parallel with pulverization techniques.

In response to the above requirements, the direction of recent development has shifted from mills that mainly use impact force, such as transfer-type ball mills and vibration mills, to research and development of crushers that incorporate grinding. It is directed towards. The reason for this is that rotating ball mills have a critical rotational speed relative to the mill rotational speed, so it is not possible to increase the crushing capacity by changing the rotational speed, and vibration mills are expected to be used as fine pulverizers for various reasons. Currently 3
This is because it is considered that there is a wall or limit around microns.

In order to eliminate the above-mentioned limitations, planetary ball mills and horizontal cylindrical vertically rotating centrifugal mills have been proposed in which a grinding container revolves around a circular orbit in a vertical plane. In these mills, a much larger centrifugal force is generated on the balls or media themselves than on the main body, and the momentum of the balls and the relative velocity between the balls are large, causing compression by the balls and between the balls and the walls of the grinding vessel. However, in the former planetary ball mill, it is difficult to operate continuously, and there is a critical rotation speed, making it impossible to obtain sufficient satisfaction as a submicron-scale crusher. In addition, the latter type of centrifugal mill also has a critical rotational speed.Furthermore, the entire load of the mill and its centrifugal force act directly on the bearing that supports the eccentric shaft, which poses a problem and is uneconomical in terms of power. There are drawbacks such as.

Therefore, Japanese Unexamined Patent Publication No. 62-53748, No. 62-22
No. 7456, etc., proposes a horizontal rotation type crusher in which a container into which a material to be processed is charged revolves around a circular orbit on a horizontal plane.

In the crusher described in the former publication, as shown in FIG. 10, a crushing container 1' is mounted on a rotating table 5'. That is, the swivel table is supported by an elastic rod 9', and when the eccentric shaft 6' is driven by the motor 8' via the booleans 10', 10', the swivel table 5' is moved in a horizontal plane. The powder, which is being rotated around the revolution and placed in the crushing container, is crushed by the crushing force and frictional force applied by the medium. Although not shown in the figure, the lg is cut out on the side wall of the crushing container, and a screen is attached to this cutout. On the other hand, Japanese Unexamined Patent Publication No. 62-227456 discloses an improved crusher as shown in FIG. That is, a truncated conical support 11' is provided on the swivel table 5'.
The crushing container 1' is fixed by fastening means 13' in contact with the inclined surface 12' of this column and inclined at an angle α with respect to the vertical line.

[Problem B to be solved by the invention] As the reason for this is stated in the above publication, such a crusher has a smaller amount of force acting on the crushing medium than the centrifugal force caused by the gyro motion acting on the crushing container. Although this method has excellent effects in that it can increase the centrifugal force and improve the crushing efficiency, there are also problems. For example, swivel base 5
' is supported by an elastic rod 9", so it is considered difficult to apply it to a large-sized crusher due to the strength of the rod. In fact, the above publication states that the crusher is for small-capacity processing. In addition, the lot is subject to repeated bending stress during operation, which poses the problem of material fatigue.Furthermore, the swivel table 5' consists of two different types of members: one that supports it, and one that provides rotational motion. Since it is configured to revolve around different parts, it also has the drawback of increasing the number of parts and increasing costs.

Further, when processing with a vertical crusher as described above, coarse particles tend to collect in the upper part of the container, and fine crushed particles tend to collect in the lower part.

Therefore, if a screen is provided at the bottom or bottom of the container, it is possible to perform so-called continuous operation in which the material to be crushed is introduced from the top of the container and the crushed material is taken out from the bottom one after another. Since it is installed on the side of the container, it is not suitable for continuous operation. In addition, since the above-mentioned screen is formed separately from the crushing container 1' and is attached to the notch of the container 1', it takes many man-hours to install and assemble the screen, but it still reduces the strength of the screen. There are also problems with durability, etc.

The above-mentioned pulverizer, in which the pulverizing container revolves in a circular orbit, efficiently pulverizes the material to be pulverized by the sliding of the media placed in the pulverizing container or between the media and the container wall, as well as by the compressive force of the media. However, it has the disadvantage that there is a criticality in acceleration or rotational speed. That is, as the rotational speed increases, the centrifugal force also increases, but when it exceeds a certain level, the media move together due to the centrifugal force, and the movement of the media among themselves becomes small, reducing the grinding efficiency. In particular, there is no movement of the medium in the direction of gravity, resulting in a decrease in efficiency.

However, in the crusher shown in Fig. 11, the container 1' is installed at an angle α with respect to the horizontal rotating table 5', so the medium is also affected by the direction of gravity, and a decrease in the crushing efficiency is suppressed. ing. That is, as shown in FIG. 12, since the crushing container 1' is installed at an angle of α with respect to the rotating table 5', if the horizontal centrifugal effect acting on the medium is P, then the container l The component force X acting perpendicularly to the wall is X=P. cosα, and the maximum value of the component force Y in the direction of gravity on container 1' is Y=±
It becomes P sina ●cosa. In other words, a component force in the vertical direction is generated, and the medium
On the right side of the figure, it receives a downward force and is moved along the inner wall of the container. When the container turns 180 degrees, i.e. the 12th
On the left side of the diagram, the force is negative, that is, the force acts in the opposite direction, and the medium is forced to move upward.

Because a component force in the vertical direction is generated in this way, the rotating table 5'
Even if the rotation speed is increased, the medium 2 will move in the direction of gravity, and the decrease in grinding efficiency can be suppressed to some extent. However, there is a limit to the component force Y mentioned above, and there is also a limit to the number of rotations. By the way, the rotation speed of the above-mentioned crusher is 2 5 O r. p. m, and it is not possible to obtain a large centrifugal effect in the vertical direction. The reason for this is that there is no eccentricity in the component force in the vertical direction or along the wall surface, as is clear from the fact that the eccentricity ε for turning the swivel table 5' does not appear in the equation Y = Psinacosa for the component force Y. This is because it is not being used.

The present invention aims to provide a dispersion or grinding machine that solves the various problems mentioned above.

That is, an object of the present invention is to provide a rocking type dispersion/pulverization device that is equipped with a large processing container and in which a rocking plate is supported by a common component.

Another invention is a rocking dispersion system that can increase the critical rotational speed and increase the centrifugal effect to, for example, 50"G".
The purpose is to provide crushing equipment.

Another invention provides a rocking dispersion/pulverization device equipped with a screen having high strength and wear resistance, and a processing container capable of sequentially and continuously taking out the dispersed or pulverized material to be processed. The purpose is to

[Means for Solving the Problems] In order to achieve the above object, the present invention provides that a rocking plate to which a processing container is attached is supported by a plurality of eccentric shafts, and at least one of the eccentric shafts is rotated. configured to be driven.

In another invention, the plurality of eccentric shafts are configured such that their axial centers are inclined with respect to the vertical line. Furthermore, in Ike's invention, the processing vessels are stacked in single or multiple stages, and the bottom of the processing vessels is provided with a replaceable screen portion having a large number of pores with a diameter smaller than that of the dispersing or grinding medium. integrally formed.

[Operation: First, appropriate amounts of the material to be dispersed or pulverized and the medium are placed in a processing container. Then, one of the eccentric shafts is driven to revolve the rocking plate. Then, the rotational force and centrifugal force of the dispersion or grinding media apply crushing and frictional forces to the processed material, and as described in the above publication,
Dispersed or crushed. It is clear that this process can be carried out either wet or dry. By the way, according to the present invention, since the rocking plate is supported by a plurality of strong eccentric shafts, a heavy processing container can be attached thereto. In addition, the rocking plate is supported by a plurality of eccentric shafts of one type, and one of them is driven, so parts can be made common and can be provided at low cost. Further, if the eccentric shaft is provided at an angle with respect to the vertical line as in other inventions, the rotational speed of the eccentric shaft can be further increased and the crushing efficiency can be further improved.

That is, according to the present invention, even if the rotational speed is increased and the centrifugal force is increased, the crushing effect does not decrease. This is because the eccentric axis is inclined by α with respect to the vertical line, the eccentricity of the rocking plate is ε, and the centrifugal effect acting on the wall of the processing container is P, then the inclination angle α causes the medium to A maximum force of Y=±P sinα acts in the vertical direction, and Y'=±εsi is further applied due to eccentricity ε.
nα. This is because a centrifugal effect of ω2/g is added and active movement of the medium in the vertical direction is guaranteed.

However, ω: Rotational angular velocity g: Acceleration of gravity. If a screen is formed at the bottom of the processing container as in other inventions, it is closed during batch motion, and when released, continuous operation is possible. That is, the unprocessed material may be introduced from the top, and the dispersed or pulverized processed material may be sequentially discharged from the screen section. This screen portion can be attached replaceably or can be formed integrally with the processing container, and can have an appropriate thickness, high strength, and high wear resistance. Further, according to the invention in which these processing vessels are provided in multiple stages, the mixture of the object to be processed and the medium can be divided into appropriate amounts and pulverized. In addition, in an invention in which multiple stages of processing containers each having a screen section are stacked, the size of the pores of the screen and the diameter of the medium introduced into the screen are made larger in the upper stages and gradually smaller towards the lower stages. Things can be processed in a cascade fashion.

[Example] A first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

Now, referring to the figure, it can be understood at a glance that the shaking plate 6 supporting the processing container 5 is supported by three eccentric shafts 9, 13, and 13'. In other words, the swing plate whose plane is triangular is the mount frame l5.
It is supported only by three eccentric shafts bearing on the top, and is provided to revolve around a circular orbit.

The eccentric shafts 9, 13, and 13'' have the same structure, and the lower main shaft portion 130 is rotatably supported by a pair of upper and lower bearings 12, 14 that also receive loads in the thrust direction, and the upper subordinate shaft portion 131 are supported by similar bearings provided on the rocking plate 6.The eccentric shafts 9, l3 and 13' naturally support the crank part 11 which is eccentric by ε with respect to the main shaft part and the slave shaft part. A balance weight l6 is provided at the end of the crank portion.In the illustrated embodiment, an eccentric shaft 9 is driven by a motor 1 via transmission means 2 and 3. .

The processing container 4 has a bulge-like portion, and a lid 5 is provided at the upper opening of the portion, and is removably fixed to approximately the center of the oscillating plate 6 by suitable means (not shown). It has become. As will be described in detail later, when a screen portion is formed on the bottom of the processing container, the rocking plate 6 may also have an appropriate shape, for example, the processed material to be crushed can be continuously taken out from below. It is configured as follows. In this embodiment, the ratio between the diameter of the processing container 4 and the eccentricity ε is selected to be, for example, 4.5 to 8.5, and the pedestal frame 15 is mounted on the floor surface by a plurality of wk shocks HrllB. It is supported. Also in the above embodiment,
When the motor 1 is started, the eccentric shaft 9 is rotationally driven via the transmission means 2 and 3, the other eccentric shafts follow, and the rocking plate 6 revolves along a circular orbit having a radius ε. As a result, the objects to be processed, which are placed in the processing container 4 filled with a medium filling rate of, for example, 40 to 60%, will not be subjected to dispersion processing or pulverization processing due to the rotational movement and swirling movement of the medium. It's obvious.

According to this embodiment, since the swing plate 6 is supported by an eccentric shaft, a heavy processing container, that is, a large processing container can be attached. In addition, the number of parts can be reduced because both the member that supports the rocking plate and the member that gives the rocking plate its swinging motion are eccentric shafts of the same structure. Moreover, since the supporting member is an eccentric shaft, the service life is longer than that of conventional rods. Furthermore, since any eccentric shaft can be selected for the drive, there is flexibility in the arrangement of the drive motor. Next, a second embodiment of the present invention will be described with reference to FIG. According to this embodiment, although only two of the center axes 9 and 13 are shown, the plurality of eccentric axes are inclined by an angle α with respect to the vertical line C. Corresponding to this inclination, both the rocking plate 6 and the pedestal frame 15 are tilted, and a ballast mass 17 is added to the shock absorber 18 at the portion where the pedestal frame becomes higher. Since the other components are the same as those shown in FIGS. 1 and 2, they will be given the same reference numerals and will not be described repeatedly.

According to this embodiment, since the eccentric axis is inclined, a component force in the vertical direction is applied to the medium compared to that of the first embodiment. That is, as shown in FIG. 4, the rocking plate 6 and therefore the processing container 4 move vertically by 2ε sin α when performing the swinging movement. If this vertical movement is regarded as an apparent simple harmonic motion, its acceleration a is generally given by ω2x, where the displacement is X, so a=ω2εsinα. Therefore, the centrifugal effect in the vertical direction per unit mass is ω2ε sin α/g. This centrifugal effect is added to the component force P sin α generated by the eccentric axis being inclined at an angle α with respect to the vertical line C, and as a result, the movement of the medium in the direction of gravity becomes active, making it possible to increase the rotation speed. ．． In other words, this component force is 180
When rotated by a degree, the direction is reversed, and even if the rotation speed is increased to increase the centrifugal effect to, for example, 50"G", a slight vertical force acts on the medium and the object to be processed, causing the medium to become active. The movement is guaranteed and the dispersion cloud grinding efficiency is increased.

In addition, as in this embodiment, if the pedestal frame and the rocking plate are tilted according to the inclination of the eccentric axis, there is an advantage that it can be implemented by simply adding the ballast mass l7 to one of the pedestal frames in the first embodiment. .

In the third embodiment shown in FIG. 5, the eccentric shaft 9. 13 and the gantry frame l5 are inclined as in the second embodiment, but the rocking plate 6 is arranged horizontally. In this embodiment as well, the eccentric axis is inclined by an angle α with respect to the vertical line, and the eccentricity is ε, so that the equation is similar to that of the second embodiment, as shown in FIG. It is clear that the object moves in the vertical direction in a simple harmonic manner, and a component force due to the centrifugal force in the vertical direction is generated.

Although this embodiment requires eccentric shafts of two types, long and short, and cannot be standardized, it has the advantage that the processing container 4 can be mounted on a horizontal surface.

Although not shown in the drawings, it is clear that by devising the arrangement and attachment of the bearings, it is possible to incline only the eccentric shaft.

Next, an example of the processing container will be described in Section 7. 8. This will be explained with reference to FIG. The processing container 4 shown in FIG. 7 has a flask-like shape, and a screen portion 41 is physically formed in the bottom thereof. And the screen eye size is container 4
The diameter of the dispersion or grinding media is selected to be smaller than the diameter of the dispersion or grinding media to be introduced. Note that reference numeral 43 indicates a mounting plate for fixing the container to the swing plate.

When the container is shaped like a flask, the material to be processed is circulated within the container along with the medium during the pulverization process, increasing the pulverization efficiency. Of course, since the side wall of the processing container is sloped,
There is no possibility that the processed material will be scattered outside. In addition, since the screen portion 4l is provided, the upper input port 42
It is also possible to carry out so-called continuous processing in which the material to be processed is continuously inputted from the tank, the material to be processed is screened by a screen section, and then discharged downward.

An example of a similar container is also shown in Figure 8. According to this embodiment, since the cross section of the container is approximately circular, the objects to be treated and the medium can be effectively circulated within the container as shown by the arrows, allowing efficient processing. Note that elements similar to those shown in Figure 7 are given the same reference numerals. Further, although the screen portion is not shown, it is of course possible to attach it to the zero body 4 in a replaceable manner. An example in which processing containers are stacked in two stages is shown in Figure 9. In this embodiment as well, the same components as those shown in FIGS. 7 and 8 are given the same reference numerals and will not be explained repeatedly.
According to this example, by making the eye size of the lower screen 41' smaller than that of the upper screen, processing can be performed in a cascade manner.

At this time, it is also possible to increase the processing efficiency by making the diameter of the medium smaller as it goes into the lower processing container.

It is clear that in these embodiments, the screen section can be closed for batch operation.

[Effects of the Invention] As described in detail above, according to the present invention, since the rocking plate is supported by a plurality of eccentric shafts, a heavy processing container or a large processing container can be attached. In addition, the rocking plate is supported by multiple eccentric shafts of one type, and one of them is driven, so the number of parts is small and it can be provided at low cost. If the eccentric shaft is provided at an angle with respect to the vertical line as in the invention, the rotational speed can be further increased, the centrifugal force can be increased, and the crushing efficiency can be further improved.

Furthermore, if a screen is formed at the bottom of the processing container as in other inventions, it can be closed during batch operation and opened for continuous operation. Since this screen portion is formed integrally with the processing container, it has an appropriate thickness, high strength, and high wear resistance. Of course, it can also be attached replaceably to the processing container body. Further, according to the invention in which these processing vessels are provided in multiple stages, the mixture of the object to be processed and the medium can be divided into appropriate amounts and pulverized.

In addition, in an invention in which a plurality of processing containers each having a screen section are stacked, the size of the pores of the screen and the diameter of the medium to be introduced into the internal treatment are made larger in the upper stages and gradually smaller towards the lower stages. Processing products can be processed in a cascade manner.

[Brief explanation of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view showing a second embodiment of the present invention.
Fig. 4 is a schematic diagram showing the effect, and Fig. 5 is the third embodiment of the present invention.
A front view showing the embodiment, FIG. 6 is a schematic diagram showing its operation,
7th. 8. 9 is a front view showing different embodiments of the processing container, FIGS. 10 and 11 are front views showing different conventional examples, and FIG. 12 is a schematic diagram showing the operation of the conventional example shown in FIG. 4. ．． ．． Processing container, 6. ．． ．． Rocking plate, 9.
．． ．． Eccentric shaft (for driving), 13.13'. ．． ．． Eccentric shaft (for driven), 41. ．． ．． Screen part 4
Figure (0 To C Ichiji Figure 5 Figure O Figure 7 Figure 10 Figure 12 Procedure amendment (voluntary) March 1990

Claims (4)

[Claims] (1) A processing container into which the object to be processed and a dispersion or grinding medium are charged, a swing plate to which the processing container is attached, and a plurality of units that support the swing plate and revolve around it along a circular orbit. An oscillating dispersing/pulverizing device comprising an eccentric shaft, the oscillating plate being supported only by the eccentric shaft, and at least one of the eccentric shafts being driven. (2) A rocking type dispersing/pulverizing device, wherein the plurality of eccentric shafts according to claim 1 are provided at an angle with respect to a vertical line. (3) A rocking type dispersion/pulverization device, wherein the processing container according to claim 1 or 2 is a container stacked in multiple stages. (4) The processing container according to any one of claims 1 to 3 is a swingable processing container having a screen portion provided on the bottom thereof with a large number of pores having a diameter smaller than that of the dispersing or grinding medium. type dispersion/pulverization equipment.