JPH0448814Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an improvement in an apparatus that crushes and grinds powder to prepare its particles, and further coats the powder.

(Prior Art) As a granulation and coating device for fine powder, there is known a device that uses a rotating body to flow and roll the powder to size it (see Utility Model Publication No. 34054/1983, etc.).

To explain this with reference to FIG. 3, a main shaft 2 is concentrically supported at the bottom of a cylindrical granulation tank 1 by a bearing housing 3 via bearings 4A and 4B so as to be freely rotatable.

A part of the main shaft 2 is connected to the granulation tank 1 together with the guide pipe 5.
The boss portion 9 of the rotary disk 8 is fitted into the corner portion 7 at the tip thereof, and is fixed together with the rotary blade 10 (granulation blade) by a nut 11. Rotating plate 8 is granulation tank 1
The rotary blade 10 rotates horizontally inside the blade, and the rotary blade 10 also rotates above this.

Located above the rotary blade 10, a slide plate 12 is suspended from the granulation tank 1 via an adjustment bolt 13 so as to be movable up and down with respect to the upper cover 4. The slide plate 12 regulates the upper limit of the flow of powder, and has an opening 15 formed in its center.

A blower blade 17 is integrally formed on the back surface of the rotary disk 8 between it and the bottom plate 16 of the granulation tank 1 . The blower blades 17 are, for example, centrifugal blades that push air outward from the center of rotation. This air passes through the gap between the outer periphery of the rotary disk 8 and the inner periphery of the granulation tank 1, and flows as an upward air flow along the inner periphery of the granulation tank 1.

A passage 19 for introducing outside air is formed in the center of the main shaft 2, and the outside air is introduced from an air inlet 20 opened at the end of the shaft to an air inlet 21 opened inside the boss portion 9, and then connected to the rotary disk 8 and the bottom plate. Lead between 16 and 16.

For example, a predetermined amount of powder to be ground and granulated is poured into the granulation tank 1 by removing the upper lid 4. When the main shaft 2 is rotated and the rotary blade 10 is rotated together with the rotary disk 8, the charged powder is blown to the outside by the centrifugal force of the rotary disk 8, and further rises along the inner circumferential wall of the granulation tank 1. , forming a fluidized bed that repeatedly falls from a position balanced with gravity. Then, this fluidized bed is sliced by a rotary blade 10 that rotates in a horizontal plane during the ascending and descending process.

As a result, the powder undergoes appropriate grinding and pulverization, and the particles are made uniform by cutting with the rotary blade 10. In addition, as the rotary disk 8 rotates, the air blower blades 17 on its lower surface send an upward airflow through the gap between the rotary disk 8 and the granulation tank 1, so that the powder is further passed from this gap 18 through the gap around the outer circumference of the main shaft 2. It can also prevent it from falling.

(Problems to be Solved by the Invention) By the way, in such a device, as described above, the introduced outside air is pushed out from the center of rotation by the blower blades 17, and the rotary disk 8 and the granulation tank 1 are This prevents the powder from falling through the gap 18 between the main shaft 2 and the outer circumference of the spindle 2, but for this reason, the powder (raw material) is constantly mixed with air, and depending on the type of material, it may be difficult to manufacture. In some cases, deterioration such as oxidation occurred in the grains.

The purpose of this invention is to provide a grinding and granulating device that can prevent the powder from deteriorating by bringing the inside of the granulation tank close to a vacuum state as needed, while also preventing the powder from falling. do.

Another object of this invention is to provide a grinding and granulating device that can also be used for coating in a vacuum atmosphere.

(Means for Solving the Problems) In order to achieve the above object, this invention includes a cylindrical granulation tank and an upper lid that airtightly closes the granulation tank, and a lid that penetrates the bottom of the granulation tank. The main shaft is rotatably attached to the main shaft, and either a rotary blade for grinding and granulation or a rotary disk for coating is selectively attached to and detachable from the main shaft, and a gap is provided between the main shaft and the bearing part. A sealing member for airtight sealing is interposed, a connector for connecting a hose from a vacuum device is provided to a manifold communicating with the inside of the granulation tank, and a plurality of baffle plates are installed along the inner circumference of the granulation tank. A fixing means is provided to detachably fix the.

(Function) When performing grinding and granulation of powder, a rotary blade consisting of a rotary inclined blade, a rotary flat blade, etc. is attached to the main shaft, and a specified amount of powder, for example, is put into the granulation tank. Close the top lid. By closing the top lid, the inside of the granulation tank becomes airtight due to the sealing member, so
In this state, by connecting the hose to the manifold and driving the vacuum equipment, the inside of the granulation tank can be brought close to a vacuum state. Therefore, it is possible to uniformly granulate the powder by repeating appropriate grinding and pulverization using the rotating blade without causing deterioration such as oxidation.

On the other hand, a rotary disk was attached to the main shaft instead of the rotary blade, and a baffle plate was fixed to the inner circumferential surface of the granulation tank, and inorganic powder and metal particles were introduced into the granulation tank, and the top lid was closed. By driving the rotary plate, the powder and metal grains collide with each other at the baffle plate portion, making it possible to use the device as a coating device for improving the metal of inorganic powder. In addition, since the main shaft end penetrates the bottom of the granulation tank and protrudes upward, the rotary blade and rotary disk can be easily replaced by opening the top cover.

(Example) Fig. 1 is a half-cut sectional view showing each example when the left half is used as a grinding and granulating device, and the right half is used as a coating device.
First, to explain an example when used as a grinding and granulating device, 30 is a cylindrical granulating tank, 31 is an upper lid that closes the upper end opening of the granulating tank, and a fulcrum seat 32 is provided at the center of the outer surface of the lid. A bolt 35 with a tightening handle 34 is freely rotatably erected via the ring ball 33. An elevating seat 36 is screwed into the threaded portion of the bolt 35, and an arm 37 is attached to the outer periphery of the elevating seat 36.
A and 37B (arranged at mutually symmetrical positions) are rotatably connected by pins 38A and 38B. Then, the upper lid 31 engages the end hook portions 39A, 39B of the arms 37A, 37B with the flange 40 on the outer periphery of the granulation tank 30, and rotates the bolt 35 with the tightening handle 34 in the direction in which the elevator seat 36 rises. Then,
The seal 41 is compressed to airtightly close the upper end opening of the granulation tank 30. 42A, 4
2B indicates a handle.

At the bottom 43 of the granulation tank 30, a main shaft 44 is concentrically connected to a bearing 46A by a bearing housing 45.
It is rotatably supported via 46B. Reference numeral 47 denotes an oil seal that prevents the lubricating oil inside the bearing housing 45 from leaking into the granulation tank 30. This oil seal 47 is assembled to the bottom of the granulation tank 30 by the bearing housing 48 together with the bearing 46A. Cylindrical stoppers 49A, 49B are fixed to the main shaft 44 at the top and bottom inside the bearing housing 45, and between the stoppers 49A, 49B and driven rings 50A, 50B, vertical vibrations of the main shaft 44 are absorbed and alleviated. Spring 51A, 51B
is interposed. 52A and 52B are seat rings,
53A and 53B are buffer rings, 54A to 54C are gaskets, and these gaskets 5 are inside the bearing housing 45 and the bearing housing 48.
4A to 54C hermetically sealed. 55A
and 55B are the main shaft 44 and driven rings 50A, 50B
Shows a seal that seals the gap between the

The upper part of the main shaft 44 protrudes into the granulation tank 30, and a rotary inclined blade 56 and a rotary flat blade 57, which are inclined by 30 degrees in the direction of rotation, are tightened with a nut 59 via a distance collar 58, Blade 5
6 rotates horizontally inside the granulation tank 30, and a rotary flat blade 57 also rotates above it. Note that the rotating flat blade 57 is formed of a band-shaped plate material, and is attached with a cutting edge perpendicular to the rotating inclined blade 56.

The main shaft 44 is connected by a set pin 63 via a coupling ring 62 to a drive shaft 61 which is rotatably supported coaxially with the main shaft 44 through a bearing 60 at a lower portion protruding from the bearing housing 45.
Rotating inclined blade 56 by the driving force of an electric motor (not shown)
And the rotating flat blade 57 is rotated at high speed.

A manifold 65 is attached to the outer wall of the granulation tank 30 and has a passage 64 that communicates with the inside of the granulation tank 30, and the passage 64 is connected to a hose 68 of a vacuum device 67 via a connector 66 as shown in FIG. It is now possible to connect. The vacuum device 67 consists of a comb filter 69, a CVB comb 70 with a built-in electromagnetic valve for controlling vacuum pressure, and a compressor (not shown), and the air inside the granulation tank 30 is discharged through the manifold 65 by driving the compressor and the electromagnetic valve. I'm starting to do that. 7
1 indicates a vacuum gauge.

When a predetermined amount of powder (raw material) to be ground and granulated is put into the granulation tank 30 and the upper lid 31 is closed as described above, the inside of the granulation tank 30 is filled with the upper lid 31.
and gaskets 54A to 54C and seals 55A,
55B etc., it is kept completely airtight. Then, if necessary depending on the raw material, vacuum equipment 6
7 to bring the inside of the granulation tank 30 close to a vacuum state.

When the main shaft 44 is rotated and the rotary flat blade 57 is rotated together with the rotary inclined blade 56, the charged powder is blown to the outside by the centrifugal force of the rotary inclined blade 56, and further along the inner circumferential wall of the granulation tank 30. It repeats the process of rising and falling from a position balanced with gravity. Then, the input powder is sliced by a rotary inclined blade 56 and a rotary flat blade 57 rotating on a horizontal plane during the ascending and descending process, and the particles are homogenized through appropriate grinding and pulverization. In this case, the input powder is ground and granulated in a near-vacuum state, so that no deterioration of the material such as oxidation occurs. In addition, the main shaft 44
Seals 55A, 5 prevent powder from falling through the gap on the outer periphery.
5B etc. will definitely prevent this.

By the way, when metal balls are mixed inside the granulation tank 30 and agitated, fine metal powder generated by the collision of the balls can be attached to the surface of the powder, and the inorganic powder can be modified into a kind of metal. However, when used as a coating device in this way, a cylindrical rotary disk 72 is attached to the main shaft 44 instead of the rotary inclined blade 56 and the rotary flat blade 57, as shown in the right half of FIG. On the other hand, granulation tank 3
It is preferable to arrange a plurality of plates 73 (baffle plates) inside the rotary disk 72 inside the rotary disk 72 . Note that numerals 74 to 81 refer to the blades 73 in the granulation tank 30.
It shows the fixing means for fixing to the inner periphery of.
A mounting bar 74 is fixed to the blade 73 and is fixed to the granulation tank 30 via a bracket 75. The bracket 75 has a bolt portion 7 protruding from the outer peripheral wall of the granulation tank 30 at a predetermined position inside the granulation tank 30.
6 with seal rings 78A and 78B interposed therebetween, and the mounting bar 74 is airtightly attached to the bracket 75 by a seal 77 with a butterfly nut 79. It is inserted in an adjustable manner and tightened with a bolt 81.

Incidentally, after the inside of the granulation tank 30 is brought into a near-vacuum state, an inert gas may be injected into the connector 66 of the manifold 65 if necessary to prevent deterioration such as oxidation of the powder.

(Effects of the invention) In summary, according to this invention, it is possible to bring the inside of the granulation tank close to a vacuum state as needed, which prevents deterioration such as oxidation of the input powder and effectively grinds and granulates it. etc. In addition, according to this invention, either the rotary blade for grinding and granulation or the rotary disk for coating can be easily replaced by opening the top cover on the main shaft penetrated through the bottom of the granulation tank. Since a plurality of baffle plates can be detachably fixed along the inner periphery of the granulation tank, there is an advantage that it can be easily used not only as a grinding granulation device but also as a coating device.

[Brief explanation of drawings]

Fig. 1 is a half-cut cross-sectional view showing an embodiment in which the left half is used as a grinding and granulating device, and the right half is used as a coating device;
The figure is a configuration diagram of a vacuum device, and FIG. 3 is a sectional view showing a conventional technique. 30... Granulation tank, 31... Top lid, 44... Main shaft, 45... Bearing housing, 54A to 54C...
...Gasket, 55A, 55B...Seal, 56
... Rotating inclined blade, 57 ... Rotating flat blade, 65 ... Manifold, 66 ... Connector, 67 ... Vacuum equipment, 72 ... Rotating disk, 73 ... Blade.

Claims (1)

[Scope of utility model registration request] It is equipped with a cylindrical granulation tank and an upper lid that airtightly closes the granulation tank, and a main shaft is freely rotatably attached to the bottom of the granulation tank, and a rotary blade or coating for grinding and granulation is attached to the main shaft. In addition, a sealing member is interposed between the main shaft and the bearing portion to airtightly seal the gap between the main shaft and the bearing portion. A powder polishing method characterized in that a connecting manifold is provided with a connector for connecting a hose from a vacuum device, and a fixing means for detachably fixing a plurality of baffle plates is provided along the inner periphery of the granulation tank. Crushing and granulation equipment.