JPH08112521A - Powder agitating mixer - Google Patents

Abstract

PURPOSE: To prevent powder from entering a bearing and also to accurately agitate and mix powder with respect to a powder agitating mixer for agitating and mixing powder charged into an agitating/mixing chamber by an agitating blade rotating at high speed. CONSTITUTION: In a powder agitating mixer for agitating and mixing powder charged into an agitating/mixing chamber 3 by rotating an agitating blade in the chamber 3 formed in a body 2, between the chamber 3 and a bearing 10, a gas introducing space 41 is installed, and also compressed air is introduced from an air pump into the space 41 to discharge powder entering the space 41 from the chamber 3 to outside the body 2 before the powder reaches the bearing 10, and the powder is prevented from entering the bearing 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder stirring and mixing apparatus, and more particularly to a powder stirring and mixing apparatus for stirring and mixing a powder body charged in a stirring and mixing chamber by a stirring blade rotating at a high speed.

[0002]

2. Description of the Related Art For example, when prototyping powder cosmetic products such as foundations, eye shadows, and blushers, and when mixing foods, coloring materials, and resins, various powder materials are mixed by using a powder stirring mixer. The powder is agitated and mixed at a predetermined mixing ratio in a powder agitation mixing apparatus to perform an agitation mixing process.

FIG. 5 shows a conventional stirring and mixing apparatus 1 for powder of this type. As shown in the figure, the powder stirring and mixing apparatus 1 (hereinafter, simply referred to as apparatus 1) is roughly divided into a device body 2, a stirring and mixing chamber 3, a water cooling chamber 4, a bearing unit 5, a rotary shaft 6, and seal members 7 and 8. , A stirring blade 9, a bearing 10 and the like. The apparatus main body 2 is, for example, a tubular member made of stainless steel, and a first partition plate 11 is arranged at a substantially central portion thereof. This first partition plate 11
The bearing unit 5 is arranged in the lower part of the bearing, and the second partition plate 12 is arranged in the lower part of the bearing unit 5.

The first partition plate 11 is fixed to the inner wall of the apparatus main body 2 by welding, for example, and the second partition plate 1 is also provided.
The inside of the device 2 is fixed to the bearing unit 5 by using the screws 14 and the bracket 15, and the outside of the device body 2 is fixed.
It is fixed to the inner wall of, for example, by welding. Furthermore, the seal member 8 and the bearing 10 are press-fitted and fixed to the center position inside the bearing unit 5, and
The seal member 7 is press-fitted and fixed to the central position inside the first partition plate 11.

The above-mentioned first and second partition plates 11 and 12
By disposing the device main body 2 in the device main body 2, the device main body 2 is divided into three rooms. Of these three chambers, the stirring and mixing chamber 3 is at the top, the water cooling chamber 4 is at the center, and the mounting chamber 13 is at the bottom. Further, each of the rooms 3, 4, and 13 is configured to be liquid-tight to each other.

The agitating and mixing chamber 3 is a chamber in which a powder material as a material for powder cosmetics is loaded and agitated and mixed. Further, the water cooling chamber 4 is provided with a cooling water inlet 1 provided in the apparatus body 2.
9 and the cooling water discharge port 20, the cooling water is introduced from the cooling water introduction port 19 into the water cooling chamber 4, and the cooled cooling water is discharged from the cooling water discharge port 20. Has been done. The mounting chamber 13 is a portion mounted on the drive device 21 described later.

On the other hand, the above-mentioned first and second partition plates 1
A rotary shaft 6 is arranged at the center position of 1, 12. The upper end of the rotating shaft 6 projects into the stirring and mixing chamber 3,
The stirring blade 9 is fixed to this protruding portion with a bolt 16. Therefore, as the rotary shaft 6 rotates, the stirring blade 9 also integrally rotates, whereby the powder material loaded in the stirring and mixing chamber 3 is stirred and mixed. Further, a lower end portion of the rotary shaft 6 is formed with a bifurcated engaging portion 6a, and is connected to a drive shaft 18 of a motor described later.

The rotary shaft 6 is rotatably supported by a bearing 10 arranged in the bearing unit 5. As the bearing 10, for example, a ball bearing is adopted. Further, a first seal member 7 is arranged at a portion of the first partition plate 11 facing the rotary shaft 6. In addition, the bearing 10 of the bearing unit 5
The second seal member 8 is provided at a position higher than the position where is provided. By disposing the first and second sealing members 7 and 8, it is configured to prevent the powder body loaded in the stirring and mixing chamber 3 from entering the bearing 10.

At the top of the apparatus main body 2, there is a stirring and mixing chamber 3
The upper lid 22 that covers the upper part of the above is arranged so as to be detachable so that the powder body loaded in the stirring and mixing chamber 3 does not scatter during stirring and mixing. Figure 6
Shows a driving device 21 to which the device 1 having the above-mentioned configuration is mounted. The drive device 21 is provided with a motor therein, and the drive shaft 18 of the motor is configured to project above the drive device 21. The upper end of the drive shaft 18 is a portion that engages with the lower end of the rotary shaft 6 described above, and is shaped to engage with a bifurcated engaging portion 6a formed at the lower end of the rotary shaft 6. The portion 18a is formed.

An annular collar portion 23 is formed on the upper portion of the drive device 21, and the collar portion 23 can be fitted into the lower portion of the mounting chamber 13. Furthermore, this collar 23
A lock claw 23a is formed on the inner surface of the main body 2, and a recess 2a is formed at a position corresponding to the lock claw 23a on the inner peripheral position of the apparatus body 2. Therefore, the lock claw 23
By mounting the device 1 on the upper part of the drive device 21 so that a is engaged with the recess 2a, the device main body 2 can be used when the device 1 is used.
Can be prevented from rotating on the drive device 21.

With the device 1 mounted on the driving device 21 as described above, the collar portion 23 of the driving device 21 is fitted into the mounting chamber 13 of the device body 2, and the engaging portions 6a and 18a are engaged with each other. By doing so, the drive shaft 18 is connected to the rotary shaft 6. The driving device 21 has a timer 2 for setting a stirring time.
4, an on / off switch 25 for starting and stopping, a speed control switch 28 for varying the rotation speed of the drive shaft 18, and the like are provided.

As described above, the stirring and mixing process of the powder body is carried out with the device 1 mounted on the upper part of the driving device 21. Specifically, first, the upper lid 22 is removed, various powders to be stirred and mixed are loaded into the stirring and mixing chamber 3, and the upper lid 22 is mounted on the upper portion of the apparatus main body 2 again. Then timer 2
Set the stirring and mixing time by operating 4 and turn on.
The off switch 25 is turned on.

As a result, the drive shaft 18 of the motor in the drive device 21 rotates, and the rotary shaft 6 connected to the drive shaft 18 via the engaging portions 18a and 6a also rotates (the rotation speed of the motor is, for example, It is said to be a high speed rotation of 10,000 rpm to 30,000 rpm). Therefore, the stirring blade 9 connected to the rotary shaft 6 also rotates, and the various powder bodies loaded in the stirring / mixing chamber 3 are stirred and mixed.

At the time of stirring and mixing, the stirring blade 9 rotates at a high speed, so that a high-speed gas flow is generated in the stirring and mixing chamber 3, and various powders are stirred and mixed on the gas flow. . Further, during stirring and mixing, as the drive shaft 18 and the rotary shaft 6 rotate, the seal parts 7, 8 and the rotary shaft 6 slide, and heat is generated in the seal parts 7, 8. When heat is generated in the seal portions 7 and 8 as described above, the seal members 7 and 8 are deteriorated by the heat, and there is a possibility that a sufficient shielding effect cannot be realized.

However, as described above, the water cooling chamber 4 is provided in the vicinity of the rotating shaft 6 so as to surround the rotating shaft 6, and the seal portions 7 and 8 are cooled by the water cooling chamber 4 and thus the seals are formed. It is possible to prevent deterioration of the members 7 and 8 due to heat. On the other hand, the seal members 7 and 8 are disposed closer to the stirring and mixing chamber 3 than the bearing 10 is disposed, and have a function to prevent the powder body that is stirred and mixed in the stirring and mixing chamber 3 from entering the bearing 10. To do. However, in order to maintain the smooth rotation of the rotary shaft 6, each seal member 7,
8 cannot be brought into close contact with the rotary shaft 6, and inevitably the gaps 26, 27 are provided between the rotary shaft 6 and the respective seal members 7, 8.
Are formed.

Therefore, the powder body that is agitated and mixed with the high-speed gas flow as described above enters the bearing 10 through the gap portions 26 and 27, and the bearing 10
The smooth bearing function of is impaired, and the rotating shaft 6 cannot rotate properly. Therefore, in the conventional device 1, 5
It is necessary to replace the bearing 10 every time the stirring and mixing process is performed 10 to 10 times, which causes a problem that the replacement work is troublesome and the cost required for maintenance increases.

The stirring and mixing apparatus 30 for powder (hereinafter, simply referred to as apparatus 30) shown in FIG. 7 was devised to solve the above problems. In the device 30 shown in FIG. 7, the same components as those of the device 1 shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted. In the powder stirring and mixing apparatus 30 shown in the figure, a space portion 31 is formed between a pair of seal members 7 and 8, a compressed air introduction port 32 is provided on the outer wall portion of the apparatus main body 2, and a first partition is provided. A communication passage 33 that connects the space portion 31 and the compressed air introduction port 32 to the position 11
Is formed. A compressed air introduction device such as a compressor (not shown) is connected to the compressed air introduction port 32, so that the compressed air is introduced into the space 31 from the compressed air introduction port 32.

The apparatus 30 having the above structure introduces compressed air into the space portion 31 from the compressed air introduction port 32 during stirring and mixing. The introduced compressed air is supplied to the seal member 7 and the rotary shaft 6.
It flows into the stirring and mixing chamber 3 through a gap portion 26 formed between and. As described above, the compressed air generates a gas flow that flows into the stirring and mixing chamber 3 from the gap portion 26, so that the flow of the powder body from the stirring and mixing chamber 3 toward the bearing 10 can be prevented, and It is possible to prevent the powder body from entering.

Further, as described above, the device 30 has a structure in which the compressed air flows into the stirring and mixing chamber 3 through the gap portion 26. Therefore, when the air is simply allowed to flow into the stirring and mixing chamber 3, the stirring and mixing chamber 3 The pressure inside will increase. For this reason, a trap 34 is provided on the upper lid 22 that covers the stirring and mixing chamber 3. A filter 35 (shown as a satin finish) is provided inside the trap 34. The filter 35 has a structure that allows air to pass through but prevents the powder body from passing through. By providing this trap 34, the inside of the stirring and mixing chamber 3 can be made to have a pressure substantially equal to the atmospheric pressure.

As described above, the apparatus 30 inevitably causes the compressed air to flow into the stirring / mixing chamber 3 so that the trap 3 is inevitable.
It is necessary to provide 4. However, when the trap 34 is provided, the powder body adheres to the filter 35 arranged in the trap 34 and the inner wall of the trap 34. When the powder bodies adhere to the inner walls of the filter 35 and the trap 34 in this way, even if the mixing amount is measured in advance and various powder bodies are loaded into the stirring / mixing chamber 3, only the amount of the powder bodies attached to the inner walls of the filter 35 and the trap 34. There is a problem in that an error occurs in the mixing amount, and it becomes impossible to properly carry out trial manufacture of a powder cosmetic product.
Further, when the amount of the powder attached to the inner wall of the filter 35 or the trap 34 increases, the powder attached to the stirring / mixing chamber 3 becomes a lump and drops into the stirring / mixing chamber 3, which also causes There was a problem that the trial manufacture could not be performed properly.

The present invention has been made in view of the above points, and provides a powder agitating and mixing apparatus capable of preventing the powder material from entering a bearing (bearing) and accurately performing the agitating and mixing process of the powder material. The purpose is to do.

[0022]

In order to solve the above problems, according to the present invention, a stirring blade is arranged on a shaft portion which is connected to a rotation driving means and which is supported by a bearing portion. In a stirring and mixing apparatus for powder, which is configured to stir and mix the powder body loaded in the stirring and mixing chamber by rotating a stirring blade in the stirring and mixing chamber formed in FIG. The gas introduction space part is provided between the chamber and the bearing part, and a gas flow generation means for generating a gas flow is provided in the gas introduction space part, and the powder body that enters the gas introduction space part from the stirring and mixing chamber is The present invention is characterized in that the powder body is discharged to the outside of the apparatus main body before reaching the bearing portion by the gas flow generated by the flow generating means.

The gas introducing space may have a gas introducing port connected to the compressed gas generating means and an exhaust port for discharging the powder material having entered the gas introducing space. Further, the gas flow generating means may be configured by a propeller attached to the shaft portion and rotating in the gas introduction space portion.

Further, the gas flow generating means may be constituted by a groove portion formed on the shaft portion.

[0025]

As described above, the gas introduction space is provided between the stirring and mixing chamber and the bearing, and the gas flow is generated in the gas introduction space by the gas flow generating means so that the gas is generated from the stirring and mixing chamber to the gas introduction space. By adopting a configuration in which the entering powder body is discharged to the outside of the main body of the apparatus before reaching the bearing portion, it is possible to reliably prevent the powder body from entering the bearing portion.

Further, since it is possible to prevent the powder body from entering the bearing portion without introducing gas into the agitating and mixing chamber, it is not necessary to provide a trap, so that the agitating and mixing process of the powder body can be performed accurately.

[0027]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a powder stirring and mixing apparatus 40 (hereinafter, simply referred to as apparatus 40) according to a first embodiment of the present invention. In the device 40, the same components as those of the devices 1 and 30 described with reference to FIGS. 4 to 6 will be denoted by the same reference numerals.

The device 40 is used when, for example, a powder cosmetic product such as a foundation, eye shadow, blusher, etc. is manufactured as a trial product. Specifically, talc, mica, titanium oxide, iron oxide pigment, etc., which are powder cosmetic product materials, are used. Is used when stirring and mixing. The particle diameter of each powder cosmetic product material is 0.02 μm to 20 μm.
This device 40 is roughly composed of the device main body 2, the agitation / mixing chamber 3, the water cooling chamber 4, the bearing unit 5, the rotary shaft 6, the seal members 7 and 8, the agitation blades 9, the bearing 10, and a gas which is a main part of the present invention. It is configured by the introduction space portion 41 and the like.

The apparatus main body 2 is, for example, a cylindrical member made of stainless steel or ceramics, and a first partition plate 11 and a second partition plate 12 are disposed inside the tubular member. Also,
A bearing unit 5 is interposed between the first partition plate 11 and the second partition plate 12. The first partition plate 11 is fixed to the inner wall of the apparatus main body 2 by, for example, welding, and the inner side of the second partition plate 12 is fixed to the bearing unit 5 using the screws 14 and the brackets 15, and the outer side is fixed. It is fixed to the inner wall of the device body 2 by welding, for example.

Further, the seal member 8 and the bearing 10 are press-fitted and fixed to the inner center position of the bearing unit 5, and the seal member 7 is press-fitted to the inner center position of the first partition plate 11. It is fixed by that. By disposing the first and second partition plates 11 and 12 in the apparatus main body 2, the apparatus main body 2 is defined into three chambers of the stirring and mixing chamber 3, the water cooling chamber 4, and the mounting chamber 13. Become. Further, each of the rooms 3, 4, and 13 is configured to be liquid-tight to each other.

The stirring / mixing chamber 3 is a chamber in which a powder material as a material for powder cosmetics is loaded and stirred and mixed. Further, the water cooling chamber 4 is provided with a cooling water inlet 1 provided in the apparatus body 2.
9 and the cooling water discharge port 20, the cooling water is introduced from the cooling water introduction port 19 into the water cooling chamber 4, and the cooled cooling water is discharged from the cooling water discharge port 20. Has been done. Further, the mounting chamber 13 is a portion mounted on the drive device 21.

On the other hand, the above-mentioned first and second partition plates 1
A rotary shaft 6 is arranged at the center position of 1, 12. A stirring blade 9 is arranged at the upper end of the rotary shaft 6 protruding into the stirring and mixing chamber 3, and a drive shaft 18 of a driving device 21 is connected to the lower end. Therefore, the rotation shaft 6 is rotated by the drive of the drive device 21, and the stirring blade 9 is also integrally rotated accordingly. As a result, the powder bodies loaded in the stirring / mixing chamber 3 are mixed by stirring.

The rotary shaft 6 is rotatably supported by a bearing 10 fixed inside the bearing unit 5. As the bearing 10, for example, a ball bearing is adopted. Also, the first partition plate 1
A first seal member 7 is provided at a portion facing the rotary shaft 6. Further, the second seal member 8 is arranged at a position higher than the position where the bearing 10 of the bearing unit 5 is arranged. These seal members 7 and 8 are
For example, oil seal, asbestos seal, felt seal, rubber seal (made of Viton, silicone, etc.), resin seal (made of Teflon, silicone, urethane, etc.)
Etc. may be applied. By disposing the first and second sealing members 7 and 8, it is configured to prevent the powder body loaded in the stirring and mixing chamber 3 from entering the bearing 10.

Further, an upper lid 22 for covering the upper part of the stirring / mixing chamber 3 is arranged on the upper part of the apparatus main body 2 so as to be detachable, so that the stirring / mixing chamber 3 is loaded at the time of stirring and mixing. The powdered material is designed not to scatter.
Since the drive device 21 has the same configuration as that shown in FIG. 5, the description of the drive device 21 will be omitted.

Next, the gas introducing space 41, which is the main part of the present invention, will be described below with reference to FIG. 2 in addition to FIG. 2 is a sectional view taken along the line AA in FIG. The gas introduction space portion 41 is a space portion formed between the pair of seal members 7 and 8, and is formed inside the first partition plate 11. In the gas introduction space 41, the compressed gas introduction passage 4 formed in the first partition plate 11 is also provided.
2 and the gas discharge passage 43 are connected. Further, in the apparatus body 2, a gas introduction port 44 connected to the compressed gas introduction passage 42 and a discharge port 4 connected to the gas discharge passage 43.
5 are arranged respectively.

As shown in FIG. 2, the positions of the gas inlet 44 and the outlet 45 are shifted from the positions of the cooling water inlet 19 and the cooling water outlet 20 by a predetermined angle. It is arranged. In this embodiment, the gas inlet 4
4 and the cooling water discharge port 20 are separated from each other, and the discharge port 45 and the cooling water introduction port 19 are separated from each other by about 30 °. As described above, the gas introduction port 44 and the discharge port 45 are arranged so that the arrangement positions of the cooling water introduction port 19 and the cooling water discharge port 20 are displaced from each other, whereby the gas introduction port 44 and the discharge port 45 are arranged. The pipes connected to the cooling water inlet 19 and the cooling water outlet 20 and the connected devices can be prevented from interfering with each other. The above-mentioned separation angle is not limited to 30 °, and it is desirable to set it to, for example, about 10 ° to 40 ° depending on the configuration of the connected device.

The gas inlet port 44 is an air pump (not shown) (eg Takatsuki Electric Co., Ltd .: SPP-15).
(GA) is connected, and compressed air is introduced from this air pump at a flow rate of 15 liters / minute (that is, the air pump functions as a gas flow generating means). The compressed air introduced into the gas introduction port 44 is introduced into the gas introduction space 41 through the compressed gas introduction passage 42.

Further, the gas introduction space 41 is connected to a discharge port 45 via a gas discharge passage 43, and the discharge port 45 is open to the atmosphere. Therefore, the gas introduction space portion 4
The compressed air introduced into No. 1 passes through the gas discharge passage 43 and is discharged from the discharge port 45 to the outside of the apparatus main body 2. Next, the operation of the device 40 having the above configuration will be described.

In order to perform the stirring and mixing process using the device 40, the device 40 is first mounted on the upper part of the driving device 21 (see FIG. 5). Subsequently, the upper lid 22 is removed, various powders to be stirred and mixed are weighed and loaded into the stirring and mixing chamber 3, and the upper lid 22 is mounted on the upper part of the apparatus main body 2 again. Then, the rotation speed of the rotary shaft 6 is set by operating the speed control switch 28, and the timer 2
Set the stirring and mixing time by operating 4 and turn on.
The off switch 25 is turned on. Further, in accordance with this, the air pump described above is also started.

As a result, the drive shaft 18 of the motor in the drive unit 21 has a predetermined rotational speed (for example, 10,000).
rpm to 30,000 rpm), and the rotary shaft 6 also rotates at high speed accordingly. Therefore, the stirring blade 9 connected to the rotary shaft 6 also rotates, and the various powder bodies loaded in the stirring / mixing chamber 3 are stirred and mixed. Further, the compressed air is supplied to the gas inlet port 44 by the activation of the air pump.
Is introduced into the gas introduction space 41 through the compressed gas introduction passage 42, and then through the gas discharge passage 43.
Is discharged to the outside of the apparatus main body 2. That is, when the air pump is activated, a flow of air from the gas introduction port 44 to the discharge port 45 via the gas introduction space 41 is generated in the apparatus main body 2.

During the stirring and mixing process, since the stirring blade 9 rotates at a high speed, a high-speed gas flow is generated in the stirring and mixing chamber 3, and various powders are stirred and mixed on the gas flow. Become. The seal members 7 and 8 are disposed closer to the stirring and mixing chamber 3 than the bearing 10 is disposed, and have a function of preventing powder particles that are stirred and mixed in the stirring and mixing chamber 3 from entering the bearing 10. However, as described above, the gaps 26 and 27 are necessarily formed between the rotary shaft 6 and the respective seal members 7 and 8 in order for the rotary shaft 6 to rotate smoothly.

Therefore, it is conceivable that the powder in the stirring and mixing chamber 3 enters the gas introducing space 41 through the gaps 26 and 27. However, since the compressed air generated by the air pump is introduced into the gas introduction space 41 through the gas introduction port 44 and the compressed gas introduction passage 42 as described above, the internal pressure in the gas introduction space 41 is large. It is higher than atmospheric pressure.

Therefore, the powder body in the stirring and mixing chamber 3 does not enter the gas introducing space 41, so that the powder body can surely be prevented from entering the bearing 10. Further, even if the powdery body enters the gas introducing space 41 through the gap 26, the invading powdery body is urged by the compressed air and the gas exhaust passage 43 and the exhaust port 45.
It is discharged to the outside of the apparatus main body 2 via. Therefore, it is possible to reliably prevent the powder body from entering the bearing 10.

As a result, it is possible to eliminate the replacement work of the bearing 10 which is conventionally required every time the stirring and mixing process is performed 5 to 10 times.
Further, since the maintenance is free in this way, the cost required for the maintenance can be reduced. On the other hand, when the pressure of the compressed air introduced into the gas introduction space 41 is high, this compressed air is not
It is conceivable that the gas flows from 1 into the stirring and mixing chamber 3 through the gap portion 26.

However, in this embodiment, the pressure of the compressed air generated by the air pump and the compressed gas introduction passage 42,
By appropriately selecting the cross-sectional area of the gas discharge passage 43,
The pressure in the gas introducing space 41 is configured to be slightly higher than the pressure in the stirring and mixing chamber 3. Specifically, the pressure in the gas introduction space 41 is equal to the pressure in the gas introduction space 4
The pressure is such that air does not flow toward the inside of the stirring / mixing chamber 3 from 1 and is a pressure that can blow the powder body that has entered the gas introducing space 41 to the outside of the apparatus main body 2. .

Therefore, it is not necessary to provide the trap 34 unlike the device 30 shown in FIG. 6, and the powder body does not adhere to the trap 34. Therefore, the measured mixing ratio of each powder body does not come up by the stirring and mixing process, and the accurate stirring and mixing process can be performed. Further, as described above, it is conceivable that the powder body enters the gas introduction space 41, but since the pressure in the gas introduction space 41 is higher than the pressure in the stirring and mixing chamber 3, the powder body entering The amount is extremely small, and the mixing ratio of the weighed powders does not occur due to the stirring and mixing process. Therefore, also by this, accurate stirring and mixing processing can be realized.

In the above-mentioned embodiment, an example in which an air pump for introducing compressed air into the gas inlet 44 is used as the gas flow generating means, but a vacuum device is connected to the outlet 45 instead of the air pump. However, the same effect can be achieved even if the air is sucked in through the exhaust port 45. FIG. 3 shows a powder stirring and mixing apparatus 50 (hereinafter, simply referred to as apparatus 50) according to a second embodiment of the present invention.
It should be noted that in the device 50 according to the second embodiment shown in the figure, the device 40 according to the first embodiment described with reference to FIGS. 1 and 2.
The same components as those in FIG.

The apparatus 40 according to the first embodiment described above has a structure in which an air pump is used as the gas flow generating means in the gas introducing space 41. However, in the configuration using the air pump, the air pump must be provided separately from the device 40, which complicates the configuration and increases the cost. Therefore, the device 40 according to the present embodiment is
The rotary shaft 6 is provided with a propeller 51 as a gas flow generating means. The propeller 51 is arranged so as to be located in the gas introduction space 41, and is configured to rotate integrally with the rotary shaft 6. Therefore,
When the drive device 21 is activated and the rotary shaft 6 rotates, the propeller 51 also rotates accordingly, and an air flow is generated in the gas introduction space 41.

As described above, the rotation speed of the rotary shaft 6 is 1
Since it is a high speed of 0000 rpm to 30000 rpm,
The flow velocity of the air generated in the gas introduction space 41 by the rotation of the propeller 51 is high, so that the compressed gas introduction passage 42,
By appropriately selecting the cross-sectional area of the gas discharge passage 43,
The pressure in the gas introduction space 41 can be increased to a desired pressure.

Therefore, also in the device 50 according to the present embodiment, it is possible to prevent the powder body in the stirring / mixing chamber 3 from entering the gas introducing space 41 as in the device 40 according to the first embodiment. Therefore, it is possible to reliably prevent the powder body from entering the bearing 10. In addition, the gap 2
Even if the powder body enters the gas introduction space 41 via 6, the invading powder body is urged by the air flow generated by the rotation of the propeller 51, and the gas discharge passage 43 and the discharge port 4 are formed.
It is discharged to the outside of the apparatus main body 2 via 5. Therefore, it is possible to reliably prevent the powder body from entering the bearing 10. FIG. 4 shows a powder stirring and mixing apparatus 60 (hereinafter, simply referred to as apparatus 60) according to a third embodiment of the present invention. In the device 60 according to the third embodiment shown in the figure, the same components as those of the device 40 according to the first embodiment described with reference to FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted. .

The device 60 according to the present embodiment is also configured to simplify the device configuration and prevent the powder body from entering the bearing 10 without using an air pump or the like. For this reason, the device 60 according to the present embodiment is characterized in that a groove 61 is formed in the rotary shaft 6 as a gas flow generating means. The groove 61 is arranged so as to be located in the gas introducing space 41. Also, the groove 6
Since 1 is directly formed on the rotary shaft 6, the groove 61 is also integrally rotated with the rotation of the rotary shaft 6. Therefore, when the drive device 21 is activated and the rotary shaft 6 rotates, the groove 61 also rotates accordingly, so that an air flow is generated in the gas introduction space 41.

As described above, the rotation speed of the rotary shaft 6 is 1
Since it is a high speed of 0000 rpm to 30000 rpm,
The flow velocity of the air generated in the gas introduction space 41 due to the rotation of the groove 61 is high, and therefore the pressure in the gas introduction space 41 is adjusted by appropriately selecting the cross-sectional areas of the compressed gas introduction passage 42 and the gas discharge passage 43. The pressure can be raised to a desired pressure.

Therefore, also in the apparatus 60 according to the present embodiment, it is possible to prevent the powder body in the stirring / mixing chamber 3 from entering the gas introducing space 41 as in the apparatus 40 according to the first embodiment. Therefore, it is possible to reliably prevent the powder body from entering the bearing 10. In addition, the gap 2
Even if the powder body enters the gas introducing space 41 via 6, the invading powder body is urged by the air flow generated by the groove 61, and is passed through the gas discharge passage 43 and the discharge port 45 of the apparatus main body 2. It is discharged to the outside. Therefore, it is possible to reliably prevent the powder body from entering the bearing 10.

[0054]

As described above, according to the present invention, the gas introducing space is provided between the stirring and mixing chamber and the bearing portion, and the gas flow generating means generates a gas flow in the gas introducing space, whereby the stirring and mixing chamber is produced. It is possible to reliably prevent the powder body from entering the bearing part by mixing the powder body entering the gas introduction space part to the outside of the main body of the device before reaching the bearing part. Since it is possible to prevent the powder body from entering the bearing portion without introducing gas into the chamber, it is not necessary to provide a trap, and therefore the powder body can be accurately stirred and mixed.

[Brief description of drawings]

FIG. 1 is a sectional view of a powder stirring and mixing apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view of a powder stirring and mixing apparatus according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a powder stirring and mixing apparatus according to a third embodiment of the present invention.

FIG. 5 is a sectional view showing an example of a conventional stirring and mixing apparatus for powder.

FIG. 6 is a perspective view for explaining a driving device to which the powder stirring and mixing device is attached.

FIG. 7 is a sectional view showing an example of a conventional stirring and mixing apparatus for powder.

[Explanation of symbols]

 2 Device Main Body 3 Stirring Mixing Room 4 Water Cooling Room 5 Bearing Unit 6 Rotating Shaft 7, 8 Sealing Member 9 Stirring Blade 10 Bearing 11 First Partition Plate 12 Second Partition Plate 13 Mounting Room 18 Drive Shaft 19 Cooling Water Inlet 20 Cooling water discharge port 21 Drive device 22 Upper lid 26,27 Gap 40, 50, 60 Device (stirring and mixing device for powder) 41 Gas introduction space 42 Compressed gas introduction passage 43 Gas discharge passage 44 Gas introduction port 45 Discharge port 51 Propeller 61 Groove

Claims (4)

[Claims] 1. A stirring blade is disposed on a shaft portion which is connected to a rotation driving means and is supported by a bearing portion, and the stirring blade is rotated in a stirring and mixing chamber formed in the apparatus main body. In a powder agitation mixing device configured to agitate and mix a powder body loaded in the agitation mixing chamber, a gas introduction space portion is provided between the agitation mixing chamber and the bearing portion arranged in the apparatus main body. And a gas flow generation means for generating a gas flow in the gas introduction space part, and the powder body entering the gas introduction space part from the stirring and mixing chamber is generated by the gas flow generation part. The powder agitating and mixing apparatus is characterized in that the powder body is discharged to the outside of the apparatus main body before reaching the bearing section. 2. The gas introducing space portion is provided with a gas introducing port connected to the compressed gas generating means, and an exhaust port for discharging the powder material that has entered the gas introducing space portion. The powder mixing and mixing apparatus according to claim 1. 3. The powder mixing and mixing apparatus according to claim 1, wherein the gas flow generating means is constituted by a propeller attached to the shaft and rotating in the gas introducing space. 4. The powder mixing and mixing apparatus according to claim 1, wherein the gas flow generating means is constituted by a groove portion formed in the shaft portion.