JP2000126573A - Powder processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder processing device for improving the efficiency of processing a material to be processed. SOLUTION: A powder processing device is provided with a cylindrical rotor 3 rotating around a rotating axial center X along the up and down direction and having a receiving face 6 on which a material 4 to be processed is pressed and an inner piece 5 so disposed as to be close to the receiving face 6 in the cylindrical rotating body 3, and both of the rotor and the inner piece are provided in a casing 2 with an almost cylindrical inner peripheral face 9 and the pressurizing force or shearing force is applied to the material 4 to be processed and the material is processed into a powder while the material 4 is circulated between a press space 7 clamped by the receiving face 6 and the inner piece 5 and a circulating line 10 clamped between the outer peripheral face 8 of the cylindrical rotor 3 and the inner peripheral face 9 of the casing 2 inside the casing 2 of a powder processing device. The device is rotated integrally with the cylindrical rotor 3 while being close to the inner peripheral face 9 of the casing 2, and a spiral protruded section 11 is provided on the outer peripheral face 8 of the cylindrical rotor 3 rotating around the rotating axis X.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical rotating body which is rotatable about a rotation axis along a vertical direction and has a receiving surface on its inner peripheral portion against which an object to be processed is pressed, An inner piece disposed inside the cylindrical rotating body so as to be close to the inside of a casing having a substantially cylindrical inner peripheral surface, and inside the casing, the receiving surface and the inner piece Pressing space between the pressing space and the circulation path between the outer peripheral surface of the cylindrical rotating body and the inner peripheral surface of the casing while applying a pressing force or The present invention relates to a powder processing apparatus that applies a shearing force to perform powder processing.

[0002]

2. Description of the Related Art Conventionally, as a powder processing apparatus of this kind,
For example, as shown in FIG. 4, a cylindrical rotating body 3 having a bottom 19 having a large opening is provided.
9 and is then supplied again from above through the circulation path 10 to the inside of the cylindrical rotating body 3, wherein the rotating blades 30 are disposed below the outer peripheral portion of the cylindrical rotating body 3.
Some had. The rotating blades 30 are provided at a plurality of positions along the circumferential direction of the cylindrical rotating body 3 so as to protrude outward from the position below the cylindrical wall portion 20 with respect to the rotation axis X. . In the apparatus, the workpiece 4 pushed out from the lower part of the cylindrical rotary body 3 by receiving a pressing force or the like by the receiving surface 6 and the inner piece 5 in the pressing space 7 is rotated by the rotating blade 30 to the circulation path 10. Is transported upward, and is again supplied to the internal space 31 of the cylindrical rotator 3 from above the cylindrical rotator 3.

[0003]

However, in the above-mentioned conventional apparatus, since the rotating blades 30 are provided below the cylindrical rotating body 3, the reliability of circulating the workpiece 4 is inferior as described below. There was a disadvantage. For example, when the workpiece 4 is conveyed upward by the rotating blades 30, a direct impact force by the rotating blades 30 is applied to the workpiece 4 near the rotating blades 30. Thus, the workpiece 4 is reliably transported upward. However, at a position above the circulation path 10 that is separated from the rotary blade 30,
The processing object 4 is conveyed only by the force of the upward flow formed by the rotating blades 30. Therefore, if the mass of the object 4 is large, or if the object 4 is attached to the surface of the rotary blade 30 and the transport function of the rotary blade 30 is reduced, the object 4 is Not only does the transport efficiency decrease, but there is also a risk that the workpiece 4 may flow backward from between adjacent rotating blades 30.

[0004] The rotary blade 30 is provided with a cylindrical rotary member 3.
Is formed by a plate-like piece simply protruding outward from the lower side of the cylindrical wall portion 20 of, for example, when the amount of the workpiece 4 to be put into the inside of the casing 2 is too large, etc. There is a possibility that the load acting on the blade 30 becomes excessive and the rotating blade 30 is deformed.

On the other hand, the receiving surface 6 of the cylindrical rotating body 3 applies a pressing force or the like to the workpiece 4 in cooperation with the inner piece 5, and the distance between the inner piece 5 and the receiving surface 6 is reduced. In order to keep it constant, it is necessary to have a certain strength or more so that the cylindrical rotating body 3 is not deformed. In the conventional cylindrical rotating body 3, the strength is ensured by setting the cylindrical wall portion 20 to a predetermined thickness. However, the cylindrical rotating body 3
In order to reduce the driving load, it is preferable to reduce the weight of the cylindrical rotating body 3, and in this respect, there is room for improvement in the conventional powder processing apparatus.

An object of the present invention is to provide a powder processing apparatus which can solve the above-mentioned conventional problems and can improve the processing efficiency of an object to be processed.

[0007]

Means for Solving the Problems [Structure 1] A powder processing apparatus according to the present invention rotates integrally with a cylindrical rotating body 3 while approaching an inner peripheral surface 9 of a casing 2, as described in claim 1, A helical projection (hereinafter, referred to as a rotation axis X with respect to the rotation axis X of the cylindrical rotor 3)
(Referred to as a spiral convex portion 11) on the outer peripheral surface 8 of the cylindrical rotating body 3. [Function and effect] As in this configuration, if a helical convex portion that rotates in close proximity to the inner peripheral surface of the casing is provided on the outer peripheral surface of the cylindrical rotating body, the helical protrusion is continuous with the workpiece that has entered the space. Thus, the object to be processed can be reliably circulated inside the casing by applying a conveying force. In addition, since the spiral convex portion is formed on the outer peripheral surface of the cylindrical rotating body, the cylindrical rotating body and the spiral convex portion itself can be reinforced. Therefore, it is possible to apply a stronger pressing force to the workpiece with the inner piece, and it is possible to select various operating conditions when performing powder processing.

[Structure 2] In the powder processing apparatus of the present invention, the cylindrical rotating body 3 is provided with the receiving surface 6
And the bottom wall 19, and the hole 21 is provided in the cylindrical wall 20 so that the object 4 can move from the pressing space 7 to the circulation path 10. it can. [Function and Effect] As in the present configuration, by providing a hole in the cylindrical wall portion for moving the object to be processed from the pressing space to the circulation path, the circulation of the object to be processed is promoted, and the receiving of the cylindrical rotating body is performed. It is possible to reduce the amount of the processing object deposited and fixed on the surface. Therefore, all the objects to be processed put into the casing are uniformly processed, and a product with stable quality can be obtained.

[Structure 3] In the powder processing apparatus of the present invention, the helical convex portion 11 can be constituted by a plate-like member. [Effects] In order to efficiently process the workpiece,
The object to be processed smoothly circulates between the pressing space sandwiched between the receiving surface and the inner piece and the circulation path sandwiched between the outer peripheral surface of the cylindrical rotating body and the inner peripheral surface of the casing. It is important to. For that purpose, it is desirable that the space relating to the circulation path is as large as possible. Therefore, as in the present configuration, the spiral projecting portion is formed of a plate-like member, and the volume occupied by the spiral projecting portion itself is minimized, so that the volume of the circulation path can be maximized. Further, if the plate-shaped member is used, the cylindrical rotating body can be configured to be lightweight, so that the device can be made compact.

[0010] As described above, reference numerals have been used to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

(Overview) FIG. 1 shows a powder processing apparatus according to the present invention. The apparatus of the present invention includes, for example, a casing 2 installed on a base 1 and having a substantially cylindrical inner peripheral surface, and a cylindrical rotating body 3 provided in the casing 2 and having a substantially cylindrical shape. And an inner piece 5 disposed inside the cylindrical rotary body 3 to generate a pressing force between the cylindrical rotary body 3 and the workpiece 4 to be processed. Usually, a powdery raw material is used for the object 4 to be processed, but a slurry raw material or a suspension raw material can also be used. By rotating the cylindrical rotator 3, a receiving surface 6 formed on the inner peripheral surface of the cylindrical rotator 3 and an inner piece 5 close to the receiving surface 6 are formed.
Are relatively rotated, and a pressing force or the like is applied to the workpiece 4 existing in the pressing space 7 between the receiving surface 6 and the inner piece 5 to process the powder.

With the powder processing apparatus of the present invention, for example, a so-called rough mixing process in which different materials are simply mixed, and a pressing and shearing force applied to a mixture of a plurality of raw materials to apply a different raw material to the surface of a specific raw material. The so-called precision mixing process, in which the raw materials of different types are fused and integrated, or the different raw materials are mixed in a state of being uniformly dispersed at the single particle level,
By applying a pressing force or a shearing force to a plurality of raw materials, for example, another raw material is adhered to the surface of a specific raw material having no sphere, and the specific raw material is shaped into a sphere or added to a raw material having no sphere. By applying pressure or the like, a part of the raw material can be crushed, and the raw material can be shaped into a spherical shape or the like. Note that these processes may be collectively referred to as a mechanofusion process.

After the object 4 is pushed out of the pressing space 7, it flows through a circulation path 10 sandwiched between an outer peripheral surface 8 of the cylindrical rotating body 3 and an inner peripheral surface 9 of the casing 2. Again, the pressure is supplied to the pressing space 7 from above the cylindrical rotating body 3. In the powder processing apparatus of the present invention, the cylindrical rotating body 3 is provided while being close to the inner peripheral surface 9 of the casing 2.
And the helical projection 11 with respect to the rotation axis X.
Is provided on the outer peripheral surface 8 of the cylindrical rotary member 3 to ensure the circulation of the processing object 4. This allows
The whole object to be processed 4 is efficiently processed.

(Casing) The casing 2 constituting the present apparatus is supported by a support member 12 mounted and fixed on the base 1. The inside of the casing 2 is formed in a cylindrical shape by a substantially cylindrical inner peripheral surface 9, and this space becomes a processing space 13 for processing the workpiece 4. The casing 2 includes a casing body 2a and a lid member 2b. The lid member 2b is detachable from the casing main body 2a, and has a workpiece input port 14 and an exhaust port 15 with a filter. A workpiece outlet 16 for removing the workpiece 4 after the processing is formed at a part of the bottom peripheral edge of the casing body 2a. With these configurations, it is also possible to perform the continuous processing of the workpiece 4. In addition, the bottom 2c of the casing 2 is inclined in a substantially conical shape so that the outer peripheral portion is located lower. this is,
It is possible to prevent the workpiece 4 that has moved to the bottom portion 2c of the casing 2 from entering the gap between the rotating shaft portion 17 of the tubular rotating member 3 and the bottom portion 2c, which will be described later, and hindering the rotation of the tubular rotating member 3. This is to prevent it.

The atmosphere inside the casing 2 can be appropriately changed according to the type of the workpiece 4 and the like. For example, various gases such as an inert gas and a heated gas can be introduced into the inside of the casing 2 from the processing object introduction port 14, and the inside of the casing 2 is pressurized and depressurized using a pressurization / vacuum pump or the like. It is also possible. Therefore, in the powder processing apparatus according to the present invention, for example, a seal is provided between the casing 2 and the rotating shaft portion 17 of the cylindrical rotating body 3 or between the casing 2 and the vertical fixed shaft 26 of the inner piece 5. Members 27a and 27b are provided.

A jacket 18 for adjusting the temperature of the processing space 13 is provided around the casing 2. A heating medium or a cooling medium from a separately provided tank (not shown) is circulated and supplied to the jacket 18 as needed. Of course, when it is not necessary to positively adjust the internal temperature of the casing 2, the supply of the heating medium or the like is not performed.

(Cylindrical Rotating Body) As shown in FIG. 1, a cylindrical rotating body 3 having a substantially cylindrical shape and rotatable about a vertical rotation axis X is provided inside the casing 2. I have. The cylindrical rotating body 3 includes, for example, a rotating shaft 17, a bottom 19 connected to the rotating shaft 17, and the bottom 19.
And a cylindrical wall portion 20 connected to the main body. The cylindrical wall 20 is provided with a hole 21 through which the workpiece 4 can move from the pressing space 7 to the circulation path 10. The rotating shaft 17 is rotatably mounted on the base 1 via a bearing 22. Motor 23 attached to base 1
A driving force is transmitted to a pulley 24b of the rotating shaft 17 by a driving belt 24a connected to the motor 23, and the cylindrical rotating body 3 is driven to rotate. By rotating and driving the cylindrical rotary body 3, a centrifugal force acts on the workpiece 4, and the workpiece 4 is pressed against the receiving surface 6 of the cylindrical rotary body 3.

The bottom portion 19 has a function of connecting the rotary shaft portion 17 and the cylindrical wall portion 20, a function of placing and holding the workpiece 4 and the like. The cylindrical wall 2
The inner peripheral surface of the object 0 becomes the receiving surface 6 of the object 4 to be moved outward by the centrifugal force. That is, the processing object 4 is held in the pressing space 7, and a pressing force is applied to the processing object 4 by cooperation of the receiving surface 6 and the inner piece 5 to perform the above-described various processes.

FIG. 1 or FIG.
The hole 21 is provided as shown in FIG. This hole 21 is
The receiving surface 6, that is, the cylindrical wall portion 20, is penetrated, and is provided at a total of two positions symmetrical with respect to the rotation axis X of the cylindrical wall portion 20. The hole 21 is for excluding a part of the workpiece 4 held in the pressing space 7 to the outside of the pressing space 7. The hole 21 is formed, for example, in a slit shape extending in the vertical direction. With this configuration, it is possible to remove the workpiece 4 from the rotating cylindrical rotating body 3 from any position along the vertical direction in the pressing space 7. Therefore, for example, even when the fluidity of the workpiece 4 is relatively poor and the workpiece 4 tends to adhere to substantially the entire receiving surface 6, the workpiece 4 is discharged to the circulation path 10 and pressed. The replacement of the workpiece 4 in the space 7 can be performed smoothly. As a result, various kinds of processing such as compounding of an object to be processed can be efficiently performed.

The number of the holes 21 is not limited to the above example. For example, only one hole or three or more holes may be provided. By changing the number of the holes 21, it is possible to appropriately set the discharge amount of the workpiece 4 existing in the pressing space 7. For example, as the number of the holes 21 is increased, the object 4 is more easily removed.
As a result, the pressing force applied by the inner piece 5 is weakened. That is, when handling the workpiece 4 in which the powder processing proceeds quickly, or when processing the workpiece 4 for which it is not desired to apply an excessive pressing force, the hole 21 is used.
Is preferably provided. As described above, by appropriately setting the number of the holes 21, it is possible to perform powder processing according to the characteristics of the workpiece 4.

FIG. 1 shows an example in which a bent portion 25 is provided on the upper edge of the cylindrical rotary member 3. Usually, the workpiece 4 moves downward along the receiving surface 6 under the influence of gravity. However, when the pressing force of the inner piece 5 is strong, or when the workpiece 4 is lightweight, The workpiece 4 is pushed up above the receiving surface 6. In this case, if the upward movement of the workpiece 4 is not restricted at all, the workpiece 4
The pressing force applied to the powder does not increase beyond a certain level, and the efficiency of the powder treatment is reduced. Therefore, by providing the bent portion 25 as in the present configuration, the processing object 4 can be kept in the pressing space 7, and the efficiency of powder processing is improved.

The object 4 to be processed is placed on the rotating shaft 17 between the bottom 19 of the cylindrical rotating body 3 and the bottom 2c of the casing 2 or between the rotating shaft 17 and the sealing member 27a. A vent 17a is provided to prevent clogging. The ventilation holes 17a are provided in the rotary shaft 17 so as to penetrate the inside of the rotary shaft 17 and to blow out gas between the bottom 19 of the cylindrical rotary body 3 and the bottom 2c of the casing 2. Openings are provided at a plurality of locations on the outer peripheral surface.
As the gas to be ejected, for example, various gases can be used in accordance with the internal atmosphere of the casing 2, such as normal air, nitrogen gas, and argon gas.

(Inner Piece) An inner piece 5 is provided inside the cylindrical rotating body 3 at a predetermined interval on the receiving surface 6. The inner piece 5
Is fixed to, for example, a vertical fixed shaft 26 provided so as to be coaxial with the rotation axis X of the cylindrical rotating body 3. The inner piece 5 applies a pressing force to the workpiece 4 in cooperation with the receiving surface 6. Therefore, the inner piece 5
Has a horizontal cross-sectional shape, for example, as shown in FIG. With this configuration, the inner piece 5
Since the effect of consolidating the object to be treated 4 that is to enter between the receiving surface 6 and the receiving surface 6 can be expected, it is advantageous for the compounding process and the like.

The inner piece 5 may be fixed similarly to the casing 2, or may be fixed to the vertical fixed shaft 2.
6 may be configured to be rotationally driven using some kind of driving means and positively rotated relative to the receiving surface 6.
That is, by appropriately setting the rotation direction or the rotation speed of the inner piece 5, the relative rotation speed between the inner piece 5 and the receiving surface 6 can be set more finely, and the optimum processing conditions according to the workpiece 4 can be set. Can be set.

(Spiral Convex Portion) In the powder processing apparatus of the present invention, in order to reliably circulate the workpiece 4 between the pressing space 7 and the circulation path 10 inside the casing 2, the rotation axis X The helical convex portion 11 centered on the cylindrical rotating body 3
Is provided on the outer peripheral surface 8. The helical projection 11 rotates integrally with the cylindrical rotating body 3. In this embodiment, as shown in FIGS. 1 and 2, the spiral convex portion 1 is formed by using a plate-like member.
1 is shown. Here, two plate-shaped members are wound and fixed at positions symmetrical about the rotation axis X. The rotation direction of the cylindrical rotating body 3 is determined by the circulation path 10.
Is a direction in which the workpiece 4 existing in the above is transported upward.
The hole 21 does not overlap with the spiral convex portion 11,
In addition, it is formed at a position where the spiral convex portion 11 exists immediately below the hole portion 21. As a result, the workpiece 4 extruded from the hole 21 is reliably transported above the casing 2 by the spiral projection 11.

The number of plate-like members constituting the spiral convex portion 11 is not limited to two. That is, the workpiece 4
In order to circulate in the optimum state, the mass of the workpiece 4
It is necessary to change the winding pitch and the like of the spiral convex portion 11 according to the viscosity, the rotation speed of the cylindrical rotary member 3 and the like. In this case, since the cylindrical rotating body 3 has a predetermined height dimension, the number of the spiral convex portions 11 to be mounted is changed each time.

By providing such a spiral convex portion 11, the outer peripheral surface 8 of the cylindrical rotating body 3 and the inner peripheral surface 9 of the casing 2 can be formed.
To be processed 4 existing in the circulation path 10 formed between
However, since the conveying force can be directly applied, the circulation of the processing object 4 in the casing 2 is ensured. Further, since the spiral convex portion 11 is attached to the entire outer peripheral surface 8 of the cylindrical rotary member 3, not only the cylindrical rotary member 3 but also the spiral convex portion 11 itself can be reinforced. Therefore, it is possible to apply a stronger pressing force to the workpiece 4 with the inner piece 5, and it is possible to select various operating conditions when performing the compounding process or the precision mixing process. Furthermore, as a result of the strength of the cylindrical rotating body 3 being improved, the cylindrical rotating body 3 can be made thinner, so that the load required for rotational driving can be reduced, and the powder processing apparatus can be made compact. It becomes possible.

On the other hand, in order to efficiently process the object 4, it is important that the object 4 can be smoothly circulated between the pressing space 7 and the circulation path 10. For that purpose, it is desirable that the circulation path 10 has a space as large as possible. Therefore, when the spiral convex portion 11 is formed of a plate-like member as in the present configuration, the spiral convex portion 11 having a sufficient width in the height direction of the cylindrical rotating body 3 is formed, for example. The spatial volume of the circulation path 10 can be maximized by the thickness of the convex part 11.

(Effects) As described above, according to the powder processing apparatus of the present invention, the processing object 4 is reliably circulated inside the casing 2 to improve the processing efficiency of the processing object 4, The rotating body 3 and the helical convex portion 11 can be reinforced, and the cylindrical rotating body 3 can be reduced in weight to provide a compact powder processing apparatus.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a powder processing apparatus of the present invention.

FIG. 2 is a partially cutaway side view showing details of a cylindrical rotating body.

FIG. 3 is a cross-sectional plan view showing details of a cylindrical rotating body.

FIG. 4 is a longitudinal sectional view showing a conventional powder processing apparatus.

[Explanation of symbols]

 Reference Signs List 2 casing 3 cylindrical rotating body 4 workpiece 5 inner piece 6 receiving surface 7 pressing space 8 outer peripheral surface of cylindrical rotating body 9 inner peripheral surface of casing 10 circulation path 11 spiral convex part 20 cylindrical wall part 21 cylindrical rotation Bottom hole of body X axis of rotation

Continued on the front page F term (reference) 4D067 CF05 CF11 CF21 4G078 BA05 CA01 DA09 EA05

Claims (3)

[Claims] A cylindrical rotating body rotatable about a rotation axis along a vertical direction, the cylindrical rotating body having a receiving surface against which an object to be processed is pressed on an inner peripheral portion; and the cylindrical rotating body approaching the receiving surface. An inner piece disposed inside the cylindrical rotary member, inside a casing having a substantially cylindrical inner peripheral surface, and a pressing space sandwiched between the receiving surface and the inner piece inside the casing. And applying a pressing force or a shearing force to the object to be processed while circulating the object to be processed between the outer peripheral surface of the cylindrical rotating body and the circulation path sandwiched by the inner peripheral surface of the casing. A powder processing apparatus for performing powder processing, wherein the powder processing apparatus rotates integrally with the cylindrical rotating body while approaching the inner peripheral surface of the casing, and forms a helical convex portion with respect to the rotation axis.
A powder processing device provided on an outer peripheral surface of the cylindrical rotating body. 2. The cylindrical rotator includes a cylindrical wall having the receiving surface and a bottom, and the workpiece can move from the pressing space to the circulation path on the cylindrical wall. The powder processing apparatus according to claim 1, further comprising: 3. The powder processing apparatus according to claim 1, wherein the spiral convex portion is formed of a plate-like member.