JP2898605B2 - Processing method of particulate material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pulverizing a granular material, a method of mixing a granular material and a liquid, and a method of preparing a highly viscous slurry material, such as a pigment or paint, using a particulate material processing apparatus. The present invention relates to a method for treating a particulate material with regard to the uniform dispersion of the particles.

[0002]

2. Description of the Related Art Heretofore, a considerable number of apparatuses have been known as the above-mentioned pulverizing apparatus and various kinds of dispersing apparatuses. Among them, there is an apparatus described in Japanese Patent Application Laid-Open No. 58-17851 as an apparatus capable of pulverizing a granular material to about a submicron. The device includes a housing having a cylindrical inner surface, in which a shaft driven by a motor, a pair of drive plates fixed to the shaft, and fixed to both drive plates and parallel to the shaft. A shaft having some flexibility such as a wire rope, and a rotor assembly composed of three rollers supported on the shaft and capable of rotating freely with respect to the driving plate. Then, when the shaft is rotated by the motor, the centrifugal force generated mainly by the rotation of the rotor assembly causes the flexible shaft to bend and the respective rollers to be pressed against the inner surface of the housing. This is an apparatus that rotates in the opposite direction, and performs processing such as pulverization by sandwiching an object to be processed between each roller and the inner surface of the housing.

[0003]

A spiral groove is formed in the roller in the above-described apparatus, and the spiral groove is a mechanism for conveying the workpiece supplied on the upper drive plate downward. is there. However, when the above device is used as a crusher, as shown in FIG. 8A, a relatively large particle is formed between one convex portion 102 on the outer peripheral surface of the roller 101 and the inner peripheral surface 103 of the housing. Between the other convex portions 102 and the inner peripheral surface 103 of the housing, it is impossible to apply a compressive force, a shearing force, or the like to the particles, and the same applies to the particles in the spiral groove 104. Cannot give the power of Therefore, the outer peripheral surface 102 of the roller 101 cannot be used effectively. In addition, even if the outer diameter of the roller 101 is made uniform so that the outer peripheral surface 102 of the roller 101 comes into close contact with the inner peripheral surface 103 of the housing, and the outer peripheral surface (convex portion 102) is finished smoothly, it is long. Due to the use of time, or even in the case of short-term use when processing highly abraded workpieces,
The convex portion 102 of the roller 101 wears and changes its shape, and the entire surface cannot be used effectively.
Therefore, the object to be processed cannot be efficiently processed in a short time. The present invention has been made in view of the above problems, and has been made of a particulate material capable of effectively performing pulverization of a particulate material, mixing and dispersion of a particulate material and a liquid, and uniform dispersion of a pigment and a paint. It is an object to provide a processing method.

[0004]

According to the above object, according to the present invention, a rotating main shaft is provided upright at a center of a container having an inner peripheral surface and a bottom surface, and a fixed interval is provided in a longitudinal direction of the main shaft. At the distal end of the holding plate having a bowl-shaped projection fixed and placed, a plurality of sub-shafts are circumferentially supported at an equal distance from the main shaft, and a plurality of ring-shaped members are mounted on the sub-shaft with the sub-shaft. A suitable amount of processing is performed on a device that can be loosely fitted with a sufficient gap, provided with stirring blades at the lower part of the lower holding plate, and in which the outer peripheral surface of the ring-shaped member can contact the inner peripheral surface of the container. Put the thing in the container,
By rotating the main shaft, the outer peripheral surface of the ring-shaped member is rotated along the inner peripheral surface of the container, and by the rotation of the stirring blade and the ring-shaped member, the processed material is pressed against the inner peripheral surface of the container while being stirred. Forming a convective motion of the processed material, which is returned to the center of the container after being further raised along the inner peripheral surface, and sandwiches the processed material between the outer peripheral surface of the ring-shaped member and the inner peripheral surface of the container; The above problem was solved by repeatedly applying a compressive force and a shearing force of the ring-shaped member to the processed material. Further, the present invention has a bowl-shaped protruding portion in which a rotating main shaft is erected at the center of a container having an inner peripheral surface and a bottom surface, and is fixed at regular intervals in the longitudinal direction of the main shaft. At the distal end of the holding plate, a plurality of sub-shafts are circumferentially supported at an equal distance from the main shaft, and a plurality of ring-shaped members are loosely fitted to the sub-shaft with a sufficient gap provided between the sub-shafts and the lower shaft. A stirring blade is provided at the lower part of the side holding plate, a jamming plate is provided at the upper part of the upper holding plate, a supply port for the processed material is provided at the bottom of the container, and a discharge port is provided at the upper part of the inner peripheral surface of the container. By continuously supplying the processed material into the container from the supply port and rotating the main shaft to a device capable of contacting the outer peripheral surface of the ring member with the inner peripheral surface of the container, the ring member is rotated. Around the inner surface of the container. It is, by the rotation of the stirring blade and the ring-shaped member, pressed against the container inner peripheral surface while stirring the treated product was raised further along the inner peripheral surface,
A convective motion of the processed material returned to the center of the container is formed, and the processed material is sandwiched between the outer peripheral surface of the ring-shaped member and the inner peripheral surface of the container, and the compressed and shearing forces of the ring-shaped member are repeatedly applied to the processed material. In addition to the above, the problem is solved by continuously discharging the product from the discharge port through the space between the main shaft and the jammer plate.

[0005]

1 and 2 show an example of an apparatus for implementing the method of the present invention. This apparatus is a batch type particulate material processing apparatus. The present invention will be described in detail with reference to FIG. Reference numeral 1 denotes a cylindrical container. The container 1 has an inner peripheral surface 2 having a central axis in the longitudinal direction, and the inside of the container 1 (which becomes a processing chamber) is shown in detail in a sectional view in FIG. The rotation mechanism 3 is housed. In the rotating mechanism 3, reference numeral 4 denotes a main shaft having the same central axis as the cylindrical container 1.
Reference numerals 5, 5 'denote a pair of holding plates fixed at regular intervals in the longitudinal direction of the main shaft 4, and 6 denotes a main shaft 4
So that they are parallel to and equidistant from each other.
The sub shaft is fixed to the sub shaft. The holding plate 5, 5 '
Has a shape in which the same number of arms as the number of sub-shafts 6 protrude from a disk-shaped member. The reason why the shape of the holding plates 5, 5 'is not a simple disk but a shape having a gap between each arm in this way is that the convection of the processed material put into the container 1 ( This is because the degree of mixing can be improved, and the amount of the processed material placed on the upper holding plate 5 can be reduced as much as possible. The sub-shaft 6 is a relatively long bolt-shaped member, which is passed through a through hole provided at the tip of the arm-shaped portion of each of the holding plates 5, 5 ', and is fixed by a nut 7. A drive source such as a motor (hereinafter, not shown) is directly connected to the upper end of the main shaft 4 or a pulley is provided, and the rotation of the drive source is transmitted to the main shaft 4 via a V-belt. It has become.

Reference numeral 8 denotes a collar fitted to the sub-shaft 6 with a slight gap therebetween, and reference numeral 9 denotes a plurality of ring members rotatably provided on the collar 8. As shown in FIG. 3, the inner diameter of the ring member 9 is sufficiently larger than the outer diameter of the collar 8, and the outer surface of the ring member 9 is
It is necessary that the structure has a sufficient gap a between the inner peripheral surface of the ring-shaped member 9 and the outer peripheral surface of the collar 8 when the inner peripheral surface 2 is in contact with the inner peripheral surface 2. Also, instead of stacking the ring-shaped member 9 between the holding plates 5 and 5 'without any gap, a certain margin is provided between the upper surface of the layer of the ring-shaped member 9 and the lower surface of the upper holding plate 5. By providing a distance (about 2 to 3 sheets depending on the thickness of the ring-shaped member 9), each ring-shaped member 9 can freely move around the collar 8. As shown in FIGS. 4 and 5, the shape of the ring-shaped member 9 is a cylindrical shape having parallel upper and lower surfaces, and the upper and lower surfaces and the outer peripheral surface may be smooth, so-called a washer-like shape. Moreover, in order to promote the biting phenomenon of the powder material as required, a shape having a curved surface 9a of various shapes on the outer peripheral surface may be used. The main shaft 4, which is located below the lower holding plate 5 ', is located above the upper holding plate 5 and / or between the two holding plates 5, 5' if necessary (not shown). The main shaft 4 is provided with stirring blades 10 and 10 ′ for stirring the processed material charged in the container 1.

[0007] Reference numeral 11 denotes an upper lid having a through hole for the main shaft 4.
Is fixed to the flange portion 13 by a binding member such as a bolt or a nut. Reference numeral 14 denotes an oil seal, and reference numeral 15 denotes an oil seal holder provided with a cut-out portion for installing the oil seal 14 therein. This device is an inner peripheral surface 2 of a container 1.
Is a device that processes various materials by the compressive force, shear force, etc. of the ring-shaped member 9 rotating along the axis, so that even if the processed material is a slurry-like material, its temperature rises with the processing time. Some resins fuse together when the slurry temperature exceeds 40 ° C. Accordingly, at least the side surface of the container 1 is formed into a jacket structure 16, and a supply port 17 and a discharge port 18 for the refrigerant are provided in the jacket 16. The processed material put in the cooling device is cooled. The above-described apparatus has a structure in which the upper lid 11 is usually attached to a gantry or the like by a binding member (hereinafter, not shown), and a jack or an air cylinder connected to a lower portion of the container 1 is operated to move the container 1 up and down. Has become.

FIGS. 6 and 7 show another example of an apparatus for implementing the present invention. This apparatus is capable of continuously processing materials, and the same reference numerals are used for the same members as those in the above embodiment. In the figure, a corner portion 20 between the inner peripheral surface 2 and the bottom surface 19 of the container 1 can be curved so that the processed material put into the container 1 does not stay in the corner portion 20. Reference numeral 21 denotes a cylindrical member fitted on the inner peripheral surface 2 of the container 1. In this device, the ring-shaped member 9
Receives a centrifugal force of the rotation mechanism 3 that rotates with the rotation of the main shaft 4 and slightly slides on the inner peripheral surface 2 while strongly pressed against the inner peripheral surface 2 of the container 1. While rotating, the main shaft 4 rotates in a direction opposite to that of the main shaft 4, that is, the ring-shaped member 9 and the inner peripheral surface 2 rub against each other, sandwiching the processed material therebetween, and performing a process such as pulverization. Because it is a device, the inner peripheral surface 2 of the container 1 and
The ring-shaped member 9 may be worn. Therefore, by fitting the cylindrical member 21 to the inner peripheral surface 2, even if the cylindrical member 21 is worn, only this portion needs to be replaced, and the cylindrical member 21 can be made of a material such as ceramics or cemented carbide. Since abrasion can be prevented by using a material having abrasion, it is possible to prevent abrasion powder from being mixed into the processed material.

FIG. 9 shows the movement of the sub-shaft 6 and the ring-shaped member 9. As shown in FIG.
If the sub-shaft 6 fixed to 5 '(not shown) has a structure in which only the ring-shaped member 9 is provided, the inner peripheral surface of the ring-shaped member 9 comes into contact with the rotational movement of the ring-shaped member 9 ( The outer peripheral surface of the sub shaft 6 that slides) is locally worn. Therefore, as shown in FIG. 9 (b), a collar 8 having an inner diameter slightly larger than the outer diameter of the collar 8 is fitted to the sub-shaft 6, and a ring-shaped member 9 is rotatably provided on the collar 8. Thereby, wear of the sub shaft 6 can be prevented. On the other hand, the collar 8 rotates slightly but also with the rotation of the ring-shaped member 9, so that the contact point between the ring-shaped member 9 and the collar 8 moves. Are uniformly worn, the frequency of replacement of the collar 8 is reduced, and only this portion needs to be replaced. As in the case of the cylindrical member 21, wear can be prevented by forming the collar 8 from a wear-resistant material such as ceramics or a super-hard material, so that wear powder is prevented from being mixed into the processed material. Can be prevented. In this case, the same applies to the ring-shaped member 9,
Alternatively, it is preferable to use a similar material.

As a method of attaching the holding plates 5 and 5 'to the main shaft 4, the holding plates 5 and 5' are fixed at regular intervals in the longitudinal direction of the main shaft 4 by the main shaft collars 22 and 22 'fitted to the main shaft 4. The plates 5 and 5 ′ may be arranged, and the nut 23 may be screwed and fixed to a thread provided at the tip of the main shaft 4. In this case, key grooves (hereinafter, not shown) are provided in the main shaft 4 and the holding plates 5, 5 ', and keys are inserted and fixed in the respective key grooves, and the rotation of the main shaft 4 is suppressed. 5 '. Notches are provided at both inner ends of the main shaft collars 22 and 22 ', so that O-rings 24 and 2' are provided.
4 ', and 25, 25' respectively,
Main shaft 4 and both main shaft collars 22,2
It is possible to prevent the processed material from entering between and hardening between the main shaft 2 'and the main shaft 4 and the main shaft collars 22 and 22' from being fixed. When a wear-resistant material such as ceramics is used for the ring-shaped member 9 and a wear-resistant material is not used for the lower holding plate 5 ′, the lower holding plate 5 ′ is slid by sliding the ring-shaped member 9. It is preferable that a bush 26 having a flange made of the same or similar material as that of the ring-shaped member 9 be fitted into the hole of the lower holding plate 5 ′ because of wearing. Further, stirring blades 10 ′ and 10 may be integrally formed on the lower surface of the lower holding plate 5 ′ and the upper surface of the upper holding plate 5, respectively, and stirring blades (not shown) are provided on the main shaft collar 22. You may. Reference numeral 27 denotes a mechanism for preventing the processed material put in the container 1 from spouting out of the system from the shaft sealing portion 28 of the upper lid 11.
Is composed of a cylindrical member 29 connected to the upper lid 11 and a disk 31 having blades 30 radially arranged on both side surfaces at regular intervals. By providing a key groove (not shown) in the disk 31 and inserting and fixing a key in the key groove, the disk 31 can be rotated with the rotation of the main shaft 4.

Numeral 32 prevents scattering of the processed material and, when the present apparatus is used as a continuous processing device, prevents the processed material from being easily processed and discharged in the container 1 without being sufficiently processed. And is fixed by a connecting member 33 from the upper lid 11. The shape of the jamming plate 32 is a ring shape having a cylindrical portion protruding downward at the inner peripheral portion thereof as shown in the figure. The outer periphery of the jamming plate 32 is formed on the inner peripheral surface 2 of the container 1 as much as possible. It is preferred that they be closely attached. Further, the shape of the jammer plate 32 may be a simple ring shape in some cases. When this apparatus is used as a continuous processing apparatus, for example, a continuous wet pulverizer, a supply port 34 for the processed material is provided on the bottom surface 19 of the container 1, and the discharge port is provided at an upper portion of the inner peripheral surface 2 of the container 1. 35 are provided,
The processed material can be continuously supplied to the above-mentioned device by a pump or the like to perform a pulverizing process. Also in this device, the side surface and the bottom surface 19 of the container 1 can be the jacket structure 16. As an auxiliary means, if necessary, the main shaft 4 is made hollow as shown in FIG. 10, and a plurality of projections 36 for centering and anti-deflection are provided inside the main shaft 4 around the distal end. And a supply port 38 and a discharge port 39 for the refrigerant at the upper end of the main shaft 4.
Are continuously provided. Then, various refrigerants are continuously supplied from the supply port 38 to the space between the cylinder 37 and the main shaft 4 via the inside of the rotary joint 40, and from the inside of the cylinder 37 to the discharge port 39 via the inside of the rotary joint 40. By forming a refrigerant supply circuit for discharging the refrigerant from the main shaft 4 and cooling the main shaft 4 and the pressing plates 5 and 5 ′ connected to the main shaft 4, the processed material supplied into the container 1 can also be cooled.

Next, the method of the present invention for batch-grinding a solid substance in a wet manner using the apparatus shown in FIGS. 1 and 2 will be described. First, a raw material in the form of a slurry in which the material to be ground is dispersed in a dispersion medium such as water is prepared. Here, the ratio of the solid substance in the raw material in the form of a slurry is preferably in the range of about 5 to 50% by weight, though it depends on the physical properties such as the particle diameter, the true density and the shape of the solid substance. An appropriate amount of the prepared slurry-like raw material is put into the container 1, and the container 1 is fixed to the upper lid 11. Here, the appropriate amount of the slurry raw material varies depending on operating conditions such as the number of revolutions of the main shaft 4, but
It is about 35 to 80% by volume of the actual volume of the container 1. Before starting the operation, the cooling water is continuously supplied from the refrigerant supply port 17 to the jacket 16. Next, when the main shaft 4 is rotated at, for example, 10 m / sec as the speed of the outermost raceway surface of the ring-shaped member 9, the ring-shaped member 9 moves in the outer circumferential direction under centrifugal force. The outer peripheral surface of 9 is pressed against the inner peripheral surface 2 of the container 1 and, while slightly sliding (slip), rotates along the inner peripheral surface 2 in a direction opposite to the rotation of the main shaft 4. At this time, the slurry-like raw material charged into the container 1 receives a centrifugal force while being agitated mainly by rotation of the lower stirring blade 10 provided on the main shaft 4 and the rotation of the ring-shaped member 9, so that the inside of the container 1 It is pressed against the peripheral surface 2, rises along the inner peripheral surface 2, and then returns to the center of the container 1. In this way, the slurry-like raw material convects into the container 1 (so-called ropeless movement), and as shown in FIG. 9B, the material to be pulverized (solid substance) is brought into contact with the ring-shaped member 9 and the inner peripheral surface 2. Between them, a gap of the size of the solid material is created between them, that is, in the figure, the ring-shaped member 9 moves from the position of the dotted line to the position of the solid line, and this solid material is Pulverized under compression and shearing forces. By repeatedly receiving these actions, the solid substance is pulverized in a short time.

Since each of the ring-shaped members 9 can move independently, each of the ring-shaped members 9 has a solid material between itself and the inner peripheral surface 2 as shown in FIG. , A compressive force and a shear force can be applied to the solid substance. In addition, since a sufficient margin is provided between the layer of the ring-shaped members 9 and the upper holding plate 5, the slurry-like raw material can enter between the ring-shaped members 9, and the lubrication of the slurry-like raw material can be performed. Due to the effect, the ring-shaped members 9 can move more smoothly, and the sliding of the ring-shaped members 9 can also pulverize the solid substance that has entered between them, though slightly. Here, the speed of the outermost raceway surface of the ring-shaped member is about 5 to 20 m / sec.
It is preferably in the range of c. At a speed lower than this, the time required for pulverization becomes longer, and the compressive and shearing forces of the ring-shaped member 9 become weaker, so that effective pulverization is not performed. On the other hand, at a speed higher than this, although the compressive force and the shearing force of the ring-shaped member 9 increase, the raw material in the form of a slurry adheres to the upper lid 11 and the like unnecessarily, and in this case also, efficient pulverization is performed. Can not. After a lapse of a certain time, the operation of the motor is stopped by stopping the rotation of the motor, and after removing a fastening member that is fastening the flange portion 13 of the container 1 and the upper lid 11, a jack or an air cylinder is operated.
If the container 1 is moved downward, only the pulverized slurry remains in the container 1, and thus a pulverized substance can be easily obtained.

Next, the method of the present invention for continuously pulverizing a solid substance in a wet manner using the apparatus shown in FIGS. 6 and 7 will be described. With the rotation mechanism 3 assembled in advance, the container 1 is fixed to the upper lid 11. Cooling water is continuously supplied to the jacket 16 from the coolant supply port 17. Next, a supply port 34 for the processed material provided on the bottom surface 19 of the container 1.
When the raw material in the form of slurry, in which the material to be ground is dispersed in a dispersion medium such as water, is continuously supplied into the container 1, the liquid level of the raw material in the slurry in the container 1 gradually rises. When the amount of the slurry raw material reaches about 20 to 30% of the effective volume of the container 1 and the main shaft 4 is rotated, the ring-shaped member 9 has a centrifugal force. In response to this, the outer peripheral surface of the ring-shaped member 9 is pressed against the inner peripheral surface 2 of the container 1, and slides (slips), though slightly, along the inner peripheral surface 2 along the inner peripheral surface 2. The rotation in the direction opposite to the rotation of 4 is performed as in the case of batch grinding. At this time, the slurry-like raw material charged into the container 1 receives a centrifugal force while being stirred by the rotation of the stirring blade 10 and the ring-shaped member 9 provided mainly at the lower part of the lower holding plate 5 ′. 1 is pressed against the inner peripheral surface 2 (21), rises along the inner peripheral surface 2 (21), and returns to the center of the container 1. As in the case of batch processing, the solid substance in the slurry raw material is pulverized by receiving the compressive force and shearing force of the ring-shaped member 9, and the solid substance is pulverized in a short time by repeatedly receiving these actions. Is done.

Also during this time, since the slurry-like raw material is continuously supplied into the container 1 from the supply port 34, the liquid level rises continuously, and eventually the main shaft 4 (main shaft collar 22) and the jammer plate Between 32 and
It is continuously discharged from the discharge port 35. Here, since inertial force acts on individual solid substances in the slurry, if the viscosity of the slurry is relatively low (the concentration is low), the solid substances (particles) in the slurry are separated and large. The particles stay in the container 1 and are repeatedly subjected to the above-mentioned action, and only the fine particles are discharged together with the dispersion medium, so that the pulverized substance can be easily obtained continuously. The particle size of the pulverized product in such a continuous pulverization process is controlled mainly by the supply speed of the slurry-like raw material (residence time in the container 1). When an organic solvent is used as the dispersion medium, it is preferable to replace the inside of the container 1 with various inert gases such as nitrogen for the purpose of preventing ignition and explosion. Therefore, in the case of batch processing, the slurry-like raw material is charged into the container 1, the container 1 is fixed to the upper lid 11, and a supply port (hereinafter, not shown) of an inert gas provided on the upper lid 11 and a drain are provided. By opening the outlet and supplying the inert gas, the air in the container 1 can be replaced in a short time. Thereafter, the supply port and the discharge port are opened, the main shaft 4 is rotated, and the same processing as described above may be performed. On the other hand, in the case of continuous processing, an inert gas is continuously supplied from an inert gas supply port (not shown) provided in the upper lid 11, and the inert gas is continuously discharged from the processed material discharge port 35. After forming the supply circuit of the active gas, the raw material in a slurry state is continuously supplied from the supply port 34, and the same processing as described above may be performed. During the processing, the inert gas is continuously discharged together with the slurry from the discharge port 35 of the processed material.

Specific Example An example in which heavy calcium carbonate having an average particle diameter of about 10 μm as a raw material is wet-batch-milled using the above-described apparatus will be described. The processing apparatus used was a container having an inner diameter of 145 mm, an inner volume of 2.4 liters, eight sub-shafts, and each sub-shaft had 35 ring-shaped members having an outer diameter of 40 mm, an inner diameter of 20 mm, and a thickness of 3 mm (total of 280). ). The input amount of the slurry-like raw material in which heavy calcium carbonate is dispersed in water (the ratio of heavy calcium carbonate is 20% by weight) is 0.9 liter (the filling degree with respect to the internal volume is 38% by volume). In addition, by continuously supplying cooling water of 15 ° C. as a refrigerant to the jacket at a rate of 5 liters / min, the temperature of the slurry-like raw material during processing could be maintained at about 35 ° C. Other conditions and results are shown in Table 1 and FIG. To measure the particle size distribution of the solid substance before and after the pulverization process,
K Laser Micron Sizer (PRO-7000S,
Seisin Corporation) was used. As shown in Table 1 and FIG. 11, the solid substance could be ground to a submicron range in a very short time.

[0017]

[Table 1]

Next, another example of the ring-shaped member is shown in FIGS. As described above, when the ring-shaped members whose upper and lower surfaces shown in FIG. 4 are parallel to each other are used, a powdery raw material or a slurry-like raw material enters between the ring-shaped members, and the lubricating effect of these raw materials causes the ring-shaped members to become Although it can move smoothly, depending on the type and condition of the raw material, especially when the raw material is a slurry, the particle size of the solid is small and the concentration of the slurry is high, the slurry acts as an adhesive, Are adhered to each other and cannot be freely moved individually, as if the above-mentioned JP-A-58-178.
As in the case of the roller of the device described in JP-A-51, it may be integrated. In this case, the ring-shaped member does not rotate smoothly, and the pulverizability becomes extremely poor, and when the material of the ring-shaped member is ceramic, the ring-shaped member may be broken. In such a case, it is desirable that the upper and lower surfaces of the ring-shaped member are not parallel, and that at least one of the upper surface and the lower surface has an angle so that the contact area between the upper and lower ring-shaped members is as small as possible. For example, as shown in FIGS. 12 and 13, the thickness of the ring-shaped member may be reduced toward the outer periphery, or conversely, may be reduced toward the center as illustrated in FIGS. 14 and 15. Thus, the ring-shaped member rotates smoothly regardless of the raw material.

Next, FIGS. 16 to 18 show another example of the sub shaft and a method of fixing the sub shaft to the holding plate. When the processed material is a powder having a relatively large particle diameter and is subjected to dry processing (in the case of a powdery raw material), the processed material enters between the subshaft 6 and the collar 8 and enters the subshaft 6. The collar 8 that has adhered and has deteriorated in motion is locally worn due to sliding of the ring-shaped member 9 and is broken in a short time, and the movement of the ring-shaped member 9 is also deteriorated, resulting in extremely poor crushability. May be. The sub-shaft 60 shown in FIG. 16 is used in such a case. The sub-shaft 60 has a cylindrical projection 42 having the same central axis and a small diameter on the upper and lower surfaces of a relatively elongated cylindrical portion 41. It has a continuous shape. When ceramic is used for the ring-shaped member 9, it is preferable that the sub-shaft 60 is also made of ceramic. However, since stress concentrates on a continuous portion between the columnar portion and the protruding portion, in such a case, a diagram is used. As shown in FIG. 17, the core 43 may be made of, for example, stainless steel, and a ceramic collar 44 may be adhered to the core. FIG. 18 shows a method of fixing these sub shafts to the holding plate. In the figure, reference numerals 5 and 5 'denote upper and lower pressing plates 47 and 47', respectively.
Are upper and lower bushes, respectively. A lower portion of the upper bush 47 is provided with a concave portion 45 for rotatably supporting the projection 42 of the sub shaft 60, and a lower bush 47 'is similarly provided with a through hole 46. The reason why no recess is provided in the lower bush 47 'is to prevent the processed material from accumulating therein. For example, these bushes are provided with a thread on a part thereof, and are screwed and fixed to the tip of the holding plate. 19 and 20 are detailed views of a main part of a rotating mechanism in which the ring-shaped member shown in FIGS. 4 and 12 is attached to the subshaft having the above structure.

[0020]

As described in detail above, the method of the present invention, that is, the method of claim 1 and claim 2, finely pulverizes the granular material and mixes the granular material with the liquid. Dispersion and uniform dispersion of pigments and paints can be efficiently performed in a short time.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an apparatus used in the present invention.

FIG. 2 is a sectional view taken along line XX of the apparatus of FIG.

FIG. 3 is a detailed sectional view of a stirring mechanism of the apparatus of FIG. 1;

FIG. 4 is a view showing an example of a ring-shaped member used in the method of the present invention, wherein (a) is a front view and (b) is a perspective view.

FIG. 5 is a view showing another example of the ring-shaped member;
(A) is a front view, (b) is a perspective view.

FIG. 6 is a longitudinal sectional view of another apparatus used in the method of the present invention.

FIG. 7 is a sectional view taken along the line YY of the device of FIG. 6;

FIG. 8 is a conceptual diagram showing a processing mechanism of an apparatus, particularly a pulverizing mechanism of a solid substance, wherein (a) illustrates a processing mechanism of a conventional apparatus, and (b) illustrates a processing mechanism of an apparatus used in the method of the present invention. It is.

FIGS. 9A and 9B are explanatory views of the operation of the rotating mechanism of the apparatus used in the present invention, wherein FIG. 9A is an explanatory view of the operation of the rotating mechanism having only a sub-shaft ring-shaped member, and FIG. FIG. 9 is an explanatory view of the movement of a rotating mechanism having a structure in which the collar is fitted to the collar and the collar includes a ring-shaped member.

FIG. 10 is a detailed view of another cooling mechanism of the apparatus used in the present invention.

FIG. 11 is a graph showing a relationship between a pulverization time and an average particle diameter of a pulverized product when a solid substance is pulverized by the method of the present invention.

FIGS. 12A and 12B are views showing an example of a ring-shaped member of an apparatus used in the present invention, wherein FIG. 12A is a front view and FIG. 12B is a perspective view.

FIG. 13 is a view showing another example of the ring-shaped member;
(A) is a front view, (b) is a perspective view.

FIG. 14 is a view showing another example of the ring-shaped member;
(A) is a front view, (b) is a perspective view.

FIG. 15 is a view showing another example of the ring-shaped member;
(A) is a front view, (b) is a perspective view.

FIGS. 16A and 16B are views showing an example of a subshaft of an apparatus used in the present invention, wherein FIG. 16A is a longitudinal sectional view and FIG. 16B is a perspective view.

FIG. 17 is a longitudinal sectional view showing another example of the sub shaft.

FIG. 18 is a diagram illustrating a procedure for fixing a sub shaft of a device used in the present invention to a holding plate.

FIG. 19 is a detailed view of a main part showing an example of a rotation mechanism of the device used in the present invention, wherein (a) is a front view and (b) is a perspective view.

FIG. 20 is a detailed view of a main part showing another example of the rotation mechanism, wherein (a) is a front view and (b) is a perspective view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Inner peripheral surface 3 Rotation mechanism 4 Main shaft 5, 5 'Holding plate 6 Sub shaft 7 Nut 8 Collar 9 Ring-shaped member 10, 10' Stirrer blade 11 Top lid 12 Packing 13 Flange part 14 Oil seal 15 Oil seal holder 16 Jacket 17 Refrigerant supply port 18 Refrigerant discharge port 19 Bottom surface 20 Corner portion 21 Cylindrical member 22, 22 'Main shaft collar 23 Nut 24, 24' O-ring 25, 25 'O-ring 26, 26' Bush 27 Powder ejection Prevention mechanism 28 Shaft seal 29 Cylindrical member 30 Blade 31 Disk 32 Jammer plate 33 Connecting member 34 Supply port for processed material 35 Exit port for processed material 36 Projection 37 Cylinder 38 Refrigerant supply port 39 Refrigerant discharge port 40 Rotary joint 41 cylindrical part 42 protruding part 43 core part 44 empty 45 recess 46 through holes 47, 47 'bushing 101 roller 102 inside the projecting portion 103 peripheral surface 104 spiral groove

Claims (4)

(57) [Claims] 1. A presser having a bowl-shaped protruding portion fixedly mounted at a constant interval in a longitudinal direction of a rotating main shaft at a center of a container having an inner peripheral surface and a bottom surface. At the leading end of the plate, a plurality of sub-shafts are circumferentially supported at an equal distance from the main shaft, and a plurality of ring-shaped members are loosely fitted on the sub-shaft with a sufficient gap provided between the sub-shafts and the lower shaft. A stirrer blade is provided at the lower part of the holding plate, and an appropriate amount of the processed material is put into the container so that the outer peripheral surface of the ring-shaped member can contact the inner peripheral surface of the container, and the main shaft is rotated. Thereby, the outer peripheral surface of the ring-shaped member is rotated along the inner peripheral surface of the container, and by the rotation of the stirring blade and the ring-shaped member, the processed material is pressed against the inner peripheral surface of the container while being stirred. Raised along the circumference Thereafter, a convection motion of the processed material returned to the center of the container is formed, and the processed material is sandwiched between the outer peripheral surface of the ring-shaped member and the inner peripheral surface of the container, and the processed material is repeatedly compressed and sheared by the ring-shaped member. A method for treating a particulate material, comprising applying force. 2. A presser having a bowl-shaped protruding portion which is provided with a rotating main shaft erected at the center of a container having an inner peripheral surface and a bottom surface, and which is fixed at regular intervals in the longitudinal direction of the main shaft. At the leading end of the plate, a plurality of sub-shafts are circumferentially supported at an equal distance from the main shaft, and a plurality of ring-shaped members are loosely fitted on the sub-shaft with a sufficient gap provided between the sub-shafts and the lower shaft. A stirrer blade is provided at the lower part of the holding plate, a jammer plate is provided above the upper holding plate, a supply port of the processed material is provided at the bottom of the container, and the discharge port is provided at an upper part of the inner peripheral surface of the container. The apparatus in which the outer peripheral surface of the ring-shaped member can be in contact with the inner peripheral surface of the container, by continuously supplying the processed material into the container from the supply port and rotating the main shaft, Rotate the outer surface along the inner surface of the container. Then, by the rotation of the stirring blade and the ring-shaped member, the processed material is pressed against the inner peripheral surface of the container while being stirred, and further raised along the inner peripheral surface.
A convective motion of the processed material returned to the center of the container is formed, and the processed material is sandwiched between the outer peripheral surface of the ring-shaped member and the inner peripheral surface of the container, and the compressed and shearing forces of the ring-shaped member are repeatedly applied to the processed material. A method for treating a particulate material, comprising applying and continuously discharging a product from a discharge port through a space between a main shaft and a jammer plate. 3. The particles according to claim 1, wherein the particles are finely pulverized, mixed and dispersed with the particles and the liquid, and uniformly dispersed with a pigment or paint in the form of a slurry. Processing method for shaped materials. 4. The method for treating a particulate material according to claim 1, wherein the solid substance dispersed in the liquid is finely pulverized.