JP4540157B2 - High-pressure airflow crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a face-to-face collision type high-pressure airflow pulverizer that is used for pulverization and classification of powders and can be used at low cost for a long period of time.
[0002]
[Prior art]
2. Description of the Related Art Face-to-face collision type high-pressure airflow crushers having pulverization and classification functions have been used for various applications. For example, a high-density ceramic sintered body can be obtained by pulverizing the ceramic powder and reducing the variation in the powder diameter by the face-to-face collision type high-pressure airflow pulverizer.
[0003]
However, in the face-to-face collision type high-pressure airflow pulverizer, the powder pulverization is carried out by causing the powders to collide with each other by the high-pressure airflow. Due to this collision, the wear in the pulverizer is severe, and in particular, the blades (rod-like bodies) of the classification rotor that classifies the powder pulverized by the high-pressure airflow are severely problematic.
[0004]
In the high-pressure airflow pulverizer, it is preferable that only the powder pulverized to a predetermined particle size can be classified and conveyed.
However, in the face-to-face collision type high-pressure gas pulverizer, powder having a particle size larger than a predetermined particle size passes through the gap between the lower surface of the classification rotor and the upper end of the powder conveying means and is mixed through the opening. There was a problem.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to solve the conventional problems and achieve the following objects. That is, according to the present invention, it is possible to suitably obtain a powder having a uniform particle size by pulverization and classification, and the local consumable member can be replaced. An object of the present invention is to provide an airflow type pulverizer.
[0006]
[Means for Solving the Problems]
The high-pressure airflow pulverizer according to claim 1 is a powder having a classification rotor for classifying powder pulverized by the high-pressure airflow , and an opening for introducing the powder classified by the classification rotor and transporting the powder to the outside. it at least comprises a body conveying means, and opening is opposed below the classifying rotor, the gap between the lower surface and the opening of the classification rotor is at 0.1mm or less, the classification rotor, A rotating body that is rotatably arranged, a rod-like body that is screwed to the rotating body, and an annular body that is screwed to the rod-like body, and one end of the rod-like body has a thread structure. The other end of the rod-shaped body has a screw hole structure that can be screwed to the rotating body, and has a fastener connection structure, and the annular body has a screw hole structure that can be screwed to the rod-shaped body. It is characterized by.
[0007]
The invention according to claim 2 is the high-pressure airflow crusher according to claim 1, wherein the fastener connection structure is a groove formed at the other end, or a pair of planes formed in parallel to each other. It is characterized by that.
According to a third aspect of the present invention, in the high-pressure airflow pulverizer according to the first or second aspect, the interior is coated with a resin material having a metal impurity content of 10 ppm or less.
[0008]
In the high-pressure airflow pulverizer according to claim 1, the classification rotor classifies the powder pulverized by the high-pressure airflow. The powder conveying means conveys the powder classified by the classification rotor to the outside. At this time, the powder conveying means is provided with an opening for introducing the powder classified by the classification rotor, and the opening is arranged facing the lower side of the classification rotor. The powder classified by the classification rotor is introduced into the powder conveying means from the opening and supplied to the outside.
Further, since the gap between the lower surface of the classification rotor and the opening is 0.1 mm or less, only the powder classified to a predetermined particle size by the classification rotor is introduced from the opening.
Furthermore, the classifying rotor includes a rotating body that is rotatably arranged, a rod-like body that is screwed to the rotating body, and an annular body that is screwed to the rod-like body. Therefore, each rotary body, rod-shaped body, and annular body are detachable. For this reason, when the rod-shaped body is worn, it can be replaced by screwing the rod-shaped body in the attaching / detaching direction. As a result, it is not necessary to replace the entire classifying rotor, and the high-pressure airflow crusher can be used at low cost for a long time.
[0013]
The high-pressure air flow supply means 3 is provided opposite to the inside of the apparatus main body 20 below the introduction path 7 and can simultaneously jet the high-pressure air flow oppositely.
The classification rotor 4 is rotatably arranged above the apparatus main body 20, and the powder conveying means 5 is arranged on the lower surface of the classification rotor 4. In the powder conveying means 5, the opening 8 is arranged to face the lower surface 9 of the classification rotor 4. The gap between the opening 8 and the lower surface 9 of the classification rotor 4 is 0.1 mm or less.
The powder introduced into the powder conveying means 5 from the opening 8 is accommodated in the powder collecting container 10.
[0014]
Below, the effect | action of the high-pressure-air-flow-type grinding | pulverization apparatus 1 of this invention is demonstrated.
In the high-pressure airflow pulverizer 1, the raw material powder is supplied from the opening 6 of the raw material powder supply means 2, and the raw material powder is introduced into the apparatus main body 20 through the introduction path 7.
Although there is no restriction | limiting in particular as said raw material powder, For example, ceramic powders, such as a silicon carbide powder, are mentioned suitably.
[0015]
The raw material powder introduced into the inside of the apparatus main body 20 is accelerated by the high-pressure airflow supplied facing from the high-pressure airflow supply means 3 provided facing downward from the introduction path 7 and collides with each other. Is pulverized.
[0016]
The pulverized and pulverized powder rides on the upward flow caused by the high-pressure airflow and is conveyed to the classification rotor 4 that rotates at a high speed above the apparatus main body 20. Of the powder conveyed to the classification rotor 4 by the rotational force of the classification rotor 4, only the powder having a predetermined particle diameter passes through the classification rotor 4 and passes through the powder conveying means 5 from the opening 8. And accommodated in the powder collection container 10.
[0017]
Here, the gap between the lower surface 9 of the classifying rotor 4 and the opening 8 is required to be 0.1 mm or less.
If the gap exceeds 0.1 mm, even powder that is incompletely classified by the classification rotor 4 passes through the lower surface 9 of the classification rotor 4 and passes through the powder conveying means 5 from the opening 8. Since it is housed in the powder collection container 10, it may not be possible to obtain a powder having a uniform particle size.
[0018]
Further, the powder conveyed to the classification rotor 4 collides with the classification rotor 4 at a high speed by the high-speed rotation of the classification rotor 4. For this reason, the wear of the classifying rotor 4, particularly the rod-like body (blade pin) 11 in the classifying rotor 4 is severe.
Here, the classification rotor 4 includes a rod-shaped body (blade pin) 11, a rotating body 12, and an annular body 13 as shown in FIGS. 2 and 3. As shown in FIGS. 3 and 4, the rod-like body (blade pin) 11 is screwed on the same circumference in the outer peripheral edge of the rotating body 12, and the annular body 13 is a rod-like body as shown in FIG. 4. These are screwed into the (blade pin) 11 and can be easily removed. Therefore, even if wear occurs as described above, only the rod-like body (blade pin) 11 can be replaced, so that powder can be pulverized at low cost over a long period of time.
[0019]
As shown in FIG. 4, one end of the rod-shaped body (blade pin) 11 has a screw thread structure, and the annular body 13 has a screw hole structure that can be screwed onto the rod-shaped body (blade pin) 11.
By screwing the thread structure of one end of the rod-shaped body (blade pin) 11 and the screw hole structure of the annular body 13, the rod-shaped body (blade pin) 11 and the annular body 13 are surely secured regardless of the degree of screwing. Connected. Further, the height of the classification rotor 4 can be easily adjusted by appropriately adjusting the degree of screwing.
By having such a structure, the rod-shaped body (blade pin) 11 and the annular body 13 are more easily attached and detached, so that the worn rod-shaped body (blade pin) 11 can be replaced more efficiently, and the long-term Accordingly, it is possible to provide a high-pressure airflow type pulverizing apparatus that can pulverize powder at low cost.
In addition, since the height of the classification rotor 4 can be easily adjusted, the gap between the lower surface 9 of the classification rotor 4 and the opening 8 in the high-pressure airflow crusher 1 can be easily maintained at 0.1 mm or less. Is possible. Therefore, it is possible to obtain a powder having a uniform particle size with higher accuracy.
[0020]
It is preferable that the other end of the rod-shaped body (blade pin) 11 has a screw hole structure that can be screwed to the rotating body 12 and has a fastener connecting structure.
The screw hole structure at the other end of the rod-shaped body (blade pin) 11 is not particularly limited as long as it can be screwed onto the rotating body 12, and a known screw hole structure is preferably exemplified.
5A and 5B are schematic configuration diagrams showing an example of the other end of the rod-shaped body (blade pin) 11 having such a structure.
[0021]
5A, the other end of the rod-shaped body (blade pin) 11 has a screw hole structure 14a that can be screwed to the rotating body 12, and has a fastener (minus driver) connection structure 15a. 5B, the other end of the rod-shaped body (blade pin) 11 has a screw hole structure 14b that can be screwed into the rotating body 12, and a fastener (spanner) connection structure 15b.
By having such a structure, the rod-shaped body (blade pin) 11 and the rotating body 12 can be more easily attached and detached, so that the worn rod-shaped body (blade pin) 11 can be replaced more efficiently and for a long time. Accordingly, it is possible to provide a high-pressure airflow type pulverizing apparatus that can pulverize powder at low cost.
[0022]
The classifying rotor 4 is preferably balanced with respect to its rotation axis. There is no restriction | limiting in particular as the method of the said balance adjustment, A well-known balance adjustment method is applied suitably. By adjusting the balance in this manner, the gap between the lower surface 9 of the classifying rotor 4 and the opening 8 is preferably maintained at 0.1 mm or less over a long period of time even when the classifying rotor 4 is rotated at a high speed. It becomes possible.
[0023]
The inside of the high-pressure airflow type pulverizer 1 is preferably coated with a resin material. In particular, from the viewpoint of obtaining a high-purity powder, it is preferably coated with a resin material having a low metal impurity content. . For example, resin materials having 10 ppm or less of metallic impurities such as B, Na, Al, K, Cr, Fe, Ni, Cu, Zn, and W are preferable.
[0024]
Examples of the resin material include polyurethane rubber, polyacetal resin, ultrahigh molecular weight polyethylene resin, polycarbonate, acrylic resin, silicon rubber, and vinyl chloride resin. Among these, a polyurethane resin and a polyacetal resin are preferably used.
Although there is no restriction | limiting in particular as thickness of the said coating layer, 1-15 mm is preferable and 2-10 mm is more preferable.
[0025]
【The invention's effect】
According to the present invention, a powder having uniform particle size can be suitably obtained by pulverization and classification, and the local consumable member can be replaced. Therefore, the high pressure that can be used at low cost over a long period of time. An airflow crusher can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a high-pressure airflow crusher of the present invention.
FIG. 2 is a schematic cross-sectional view of a classification rotor.
FIG. 3 is a schematic configuration diagram of a classification rotor.
FIG. 4 is a schematic configuration diagram when each part of the classification rotor is removed.
FIG. 5 is a schematic configuration diagram showing a preferred embodiment of the other end of the rod-like body (blade pin).
[Explanation of symbols]
1: High-pressure airflow pulverizer 2: Raw material powder supply means 3: High-pressure airflow supply means 4: Classification rotor 5: Powder conveying means 6: Opening part 7: Introduction path 8: Opening part 9: Lower surface 10 of the classification rotor: Powder collection container 11: Rod-shaped body (blade pin)
12: Rotating body 14a, b: Screw hole structure 15a, b: Fastener connecting structure 20: Device main body

Claims (3)

A classification rotor of classifying the milled powder by high pressure air flow, it comprises at least, a powder conveying means having an opening for conveying to the outside by introducing classified powder by the classifying rotor, the classification The opening is arranged oppositely below the rotor , and the gap between the lower surface of the classification rotor and the opening is 0.1 mm or less,
The classification rotor includes a rotating body that is rotatably arranged, a rod-like body that is screwed to the rotating body, and an annular body that is screwed to the rod-like body ,
One end of the rod-shaped body has a thread structure,
The other end of the rod-shaped body has a screw hole structure that can be screwed into the rotating body, and a fastener connection structure,
The annular body has a screw hole structure that can be screwed into the rod-like body, and is a high-pressure airflow type pulverizer. The high-pressure airflow crusher according to claim 1, wherein the fastener connection structure is a groove formed at the other end or a pair of planes formed in parallel to each other. The high-pressure airflow type pulverizer according to claim 1 or 2, wherein the interior is coated with a resin material having a metal impurity content of 10 ppm or less.

Images