JPH07213887A - Discharge method of powder and granular material and its apparatus - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a method and a device for discharging minute amounts of powder and granules with high accuracy, quantitatively, and continuously without the need for manual labor of workers. Improve work efficiency. [Composition] A compressed gas is supplied into a container 3 having a nozzle 2 at its tip, and the internal pressure of the container is maintained within a certain pressure range so that powder m in the container 3 continues from the nozzle 2. Discharge quantitatively and quantitatively.

Description

Detailed Description of the Invention

[0001]

The present invention relates to foods, pharmaceuticals, paints,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder metallurgical method and an apparatus for discharging the powdery particles suitable for variously mixing various kinds of powdery particles with other main components or adding them in a trace amount.

[0002]

2. Description of the Related Art For example, in the manufacture of tablets as pharmaceuticals, it is common to go through the six steps of weighing-mixing-granulating-mixing-tabletting-inspection. In the addition work of a small amount of additive, it is added to the main ingredient in the mixing or tableting process after being precisely weighed by a precision balance at the time of measurement. Thus, in the work of precisely weighing the additive by using the precision balance, it is difficult to automate the weighing work because the amount of the additive is very small and the amount of the additive is minute. Therefore, conventionally, a worker manually weighs a trace amount of additive, and therefore, conventionally, the worker also manually adds the weighed trace amount of additive to the active ingredient. It was common.

[0003]

However, if the additive is manually added as in the above-mentioned conventional method, there is a problem that the labor burden on the worker is large and the workability is poor. In particular, since the production of pharmaceuticals is usually batch production, it is necessary to weigh out the production quantity, and the labor burden on the workers becomes more significant, so that such difficulties will be improved. It was strongly requested.

As a measure for solving the above-mentioned difficulties, for example, a volumetric quantitative supply method represented by a scraping method using a box used in a granule packing machine, a supply method by screw extrusion, etc. is adopted, It is also conceivable that the additive is quantitatively supplied to the main drug component without weighing the powder or granules as the additive. However, in such a method, a trace amount is 0.1 to 1 per pharmaceutical tablet.
It has been difficult to quantitatively supply a minute amount of the powder or granules in the order of [mg] and continuously supply the powder or granules from the viewpoint of the adhesion of the powder or granules or the overall accuracy of the machine. Therefore, when extremely high accuracy is required for the amount of addition of a trace amount of additives, such as the production of tablets, after all,
After the weighing was performed manually, the additive had to be added to the main component manually.

The present invention has been proposed in view of the above points, and provides a method and a device for discharging a minute amount of a granular material with high accuracy, quantitatively, and continuously without the manual operation of an operator. Therefore, the purpose is to increase the work efficiency of the work of adding a trace amount of additive.

[0006]

The present invention as set forth in claim 1, which is proposed to achieve the above object, supplies a compressed gas into a container having a nozzle at its tip, and the pressure in the container is kept constant. By maintaining the pressure within the pressure range, the powder or granular material in the container is continuously and quantitatively discharged from the nozzle, and the powder or granular material is discharged.

According to a second aspect of the present invention, in the structure of the first aspect, the compressed gas is supplied into the container continuously or intermittently in accordance with the physical properties of the granular material. ing.

The present invention according to claims 3 to 5 is an apparatus for carrying out the method for discharging a powder or granular material according to claim 1 or 2. That is, the present invention according to claim 3 provides a container having a space portion for accommodating the powder and granule therein and having a nozzle on the tip side, and a compression for supplying compressed gas into the container. A powdery or granular material discharge device comprising a gas source and a pressure setting means for maintaining the pressure of the compressed gas supplied from the compressed gas source into the container within a predetermined pressure range.

The present invention according to claim 4 is the above claim 3.
In the above configuration, the pressure setting means includes a pressure sensor for detecting a pressure value in the container, and a pressure sensor for maintaining the pressure value detected by the pressure sensor within a predetermined pressure range. It is composed of an automatic opening / closing valve for controlling the supply of compressed gas to.

The present invention according to claim 5 provides the above-mentioned claim 3.
Or in the configuration of 4, the powder particles for controlling the supply of the powder particles into the container from the powder particle storage hopper connected to the container in order to maintain the filling amount of the powder particles in the container at a predetermined fixed amount. The body supply control means is provided.

[0011] Claims 6 to 8 are a method of discharging a powder or granular material, which is different from the above-mentioned claims 1 and 2. That is, according to the present invention of claim 6, at least at least the porous portion of the container is vibrated in a gas flow in a state where the powdery or granular material is filled in the container having the porous portion having a large number of small holes. Thus, the method of discharging a powder or granule in which the powder or granule in the container is continuously and quantitatively discharged into the gas flow from the small holes of the porous portion.

The present invention according to claim 7 provides the above-mentioned claim 6.
In the above configuration, the means for vibrating at least the porous portion of the container is means for imparting vibration to the container by mechanical means such as hammering or a vibrator.

The present invention according to claim 8 is the above claim 7.
Unlike the above, in the configuration of the above-mentioned claim 6, the means for vibrating at least the porous portion of the container is means for making the gas flow into a pulsating flow or a pulsed jet of compressed gas.

The present invention according to claim 9 is the above-mentioned claim 6.
A device for carrying out the method for discharging a powder or granule according to the present invention according to claim 1, wherein a space for accommodating the powder or granule is formed inside, and a large number of small holes are formed at least on the tip side. And a gas flow supply means for supplying a gas flow to the position where the porous part of the container is arranged, and the porous part of the container vibrates in the gas flow to thereby Is a device for discharging a granular material, which is configured to be continuously and quantitatively discharged into the gas flow from the small holes of the porous portion.

[0015]

In the method for discharging a powder or granule according to the present invention as set forth in claim 1, the compressed gas is supplied into the container containing the powder or granule, and the inside of the container and the outside of the nozzle. Compressed gas flows out of the nozzle based on the pressure difference between
Along with this, the powder particles in the container are also discharged from the nozzle to the outside. Thus, the discharge amount of the powder or granular material can be arbitrarily set by the nozzle diameter, the nozzle length, the supply pressure of the compressed gas, etc., and the pressure in the container is made constant within a predetermined pressure range. By controlling so that it becomes possible, it is possible to discharge the powder or granular material to the outside quantitatively and continuously in minute amounts.

In the discharge method of the granular material according to the second aspect of the present invention, the compressed gas is supplied into the container continuously or intermittently, of which the compressed gas is intermittently supplied. This method is effective when the nozzle is likely to be blocked by the powder or granules. That is, since the pressure in the container in which the powder or granular material is stored decreases with time, the pressure in the container can be maintained within a certain pressure range by intermittently supplying the compressed gas. Thus, when such an intermittent supply of compressed gas is made, a pulsed pressure wave is generated in the container, which imparts an impact force or a forced vibration to the powder or granular material. Will eliminate the phenomenon that the nozzle is clogged. Incidentally, in the case of intermittent supply of compressed gas, although there is a concern that the quantitativeness of the discharge amount of the powder or granules may decrease, if the nozzle has a small diameter compared to the volume of the container, the inside of the container Even if the compressed gas is intermittently supplied to the container, the powder from the nozzle is maintained even if the compressed gas is supplied intermittently because the pressure of the compressed gas is maintained almost equal and the temporal pressure drop of the pressure in the container is minute. The discharge amount of the particles does not change so much. Therefore, it is possible to secure sufficient quantitativeness.

According to the third aspect of the present invention, there is provided a powdery or granular material discharging apparatus, wherein compressed gas is supplied from a compressed gas source into the container while the powdery or granular material is contained in the container. The compressed gas pressure can be made constant within a predetermined pressure range by the pressure setting means.
The method of discharging a powder or granular material according to the present invention described in 1) can be appropriately implemented.

In the powdery- or granular-material discharging device according to the fourth aspect of the present invention, since the pressure setting means is composed of the pressure sensor and the automatic opening / closing valve, the inside of the container is controlled by opening / closing the automatic opening / closing valve. It is of course possible to make the pressure of the container constant within a predetermined range to discharge the powdered material in a fixed amount, and also to intermittently supply the compressed gas into the container by opening and closing the automatic opening / closing valve. It is also possible to appropriately carry out the method for discharging a powder or granular material according to the present invention as set forth in claim 2.

In the discharging apparatus for powder or granular material according to the present invention as set forth in claim 5, when the powder or granular material in the container is discharged from the nozzle to reduce the filling amount of the powder or granular material in the container,
The supply control means of a predetermined powder or granular material operates to supply new powder or granular material from the powder or granular material storage hopper into the container to replenish it.
Therefore, it is possible to avoid that the entire amount of the powder or granules in the container is consumed in a short time, and a small amount of the powder or granules can be continuously discharged for a long time.

In the discharging method of the powdery or granular material according to the sixth aspect of the present invention, when the porous portion of the container is vibrated in the gas flow, the powdery or granular material in the container is caused to vibrate by the vibrating action. It is continuously and quantitatively discharged into the gas flow through the holes. Thus, the discharge amount of the powdery particles depends on conditions such as the opening diameter and number of the small holes in the porous portion, the vibration period of the porous portion, the amplitude, and the gas flow condition. By making the desired condition constant, it is possible to quantitatively and continuously discharge a small amount of powder or granular material.

In the discharge method of powdery or granular material according to the present invention, the porous portion of the container can be vibrated by the gas flow which is a pulsating flow or a pulsed jet of compressed gas. Since it is not necessary to separately provide a mechanical means for vibrating the porous portion of the device, the device configuration can be simplified.

According to a ninth aspect of the present invention, there is provided a powdery or granular material discharging device according to the present invention, wherein the powdery or granular material is contained in a container having a porous portion, and the porous portion of the container is supplied from the gas flow supply means. Since a gas flow can be supplied to the container to vibrate the porous portion of the container, the method for discharging a powder or granular material according to the present invention described in claim 6 can be appropriately implemented.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment (corresponding to claims 1 to 5)] FIG. 1 is a partially cutaway sectional front view showing a powdery or granular material discharge device A according to a first embodiment of the present invention. The discharging device A includes a container 3 formed in a shape like an injection cylinder, a powder and granular material storage hopper 4 connected to an upper portion of the container 3 via an automatic opening / closing valve 8b,
A gas compressor 1 (air compressor) as a compressed gas source for supplying a compressed gas (for example, compressed air) to the powder and granular material storage hopper 4 and the container 3, and other devices described later are provided. .

Of the above, the container 3 has a space portion 30 for accommodating the powder or granular material m therein, and the nozzle 2 having the elongated pipe portion 2a is attached to the lower end tip side thereof. Has been done. The bottom side of the container 3 is formed in a conical shape, for example, so that the powder m or m in the container 3 smoothly flows into the nozzle 2. Further, in order to prevent a phenomenon (bridge phenomenon) in which the granular material m is improperly solidified above the nozzle 2 to cause clogging (bridge phenomenon), for example, a cap-shaped or ring-shaped member (not shown) is provided at the bottom of the container 3. ) Is provided as needed.

The filling of the granular material m into the container 3 is carried out by opening the automatic opening / closing valve 8b and dropping the granular material m filled in the granular material storage hopper 4 into the container 3. Made by. On the side of the container 3, an upper limit detection sensor 9 and a lower limit detection sensor 10a for the granular material m, which are configured by a photosensor or the like for detecting the filling level of the granular material m, are provided. When the filling level of the granular material m becomes lower than that of the lower limit detection sensor 10a, the automatic opening / closing valve 8b is opened and the granular material m is replenished into the container 3. Then, after that, when the filling level of the powder or granular material m reaches the level of the upper limit detection sensor 9, the automatic opening / closing valve 8b is closed and the supply of the powder or granular material m is stopped. The opening / closing operation of the automatic opening / closing valve 8b is configured to be controlled by a separately provided controller (control panel) 12a.

Inside the powder and granular material storage hopper 4, a new powder and granular material m can be successively supplied from the pipe section 20. The supply of the granular material m into the granular material storage hopper 4 is performed, for example, when the level of the granular material m becomes lower than that of the lower limit detection sensor 10b provided at the bottom of the granular material storage hopper 4 at that time. The automatic opening / closing valve 8c provided in 20 is opened so that the new granular material m is stored in the granular material storage hopper 4.
It can be configured to be thrown in. However, instead of such a configuration, for example, when the level of the granular material m becomes lower than that of the lower limit detection sensor 10b, the automatic opening / closing valve 8a is closed and the automatic opening / closing valve 8c is opened at that time, and the inside of the container 3 and the powder are The inside of the grain storage hopper 4 may be returned to the atmospheric pressure state and an alarm may be generated. Such control can also be executed by the controller 12a.

The container 3 and the gas compressor 1 are connected to each other via a pipe 5, but the connecting position of the pipe 5 to the container 3 is above the upper limit level of the powder m in the container 3. Has been done. A pressure setter 7 and an automatic opening / closing valve 8a for keeping the pressure of the compressed air supplied from the gas compressor 1 to the container 3 side constant within a predetermined error range or an allowable range are provided in the middle of the pipe 5. Has been. This automatic opening / closing valve 8a is a pressure detection sensor 1 attached to the upper part of the container 3.
It is opened and closed under the control of the controller 12a so that the pressure value in the container 3 detected in 1 becomes a predetermined constant value. When the pressure value in the container 3 becomes lower than the predetermined pressure value, the open state is established. Then, the compressed air is supplied into the container 3. Then, when the inside of the container 3 reaches a predetermined pressure value, the container 3 is closed at that time, and the supply of the compressed air into the container 3 is controlled to be stopped.

The compressed air from the gas compressor 1 is supplied not only into the container 3 but also into the granular material storage hopper 4 through the branch pipe 6. This eliminates the pressure difference between the inside of the powder storage hopper 4 and the inside of the container 3, and when the automatic opening valve 8b is opened, the powder m in the container 3 flows back to the side of the powder storage hopper 4. This is to prevent this.

Next, an example of a method for discharging powdery or granular material according to the present invention when the above-mentioned powdery or granular material discharging apparatus A is used will be described. First, while the container 3 is filled with an appropriate amount of the granular material m, the automatic opening / closing valve 8a is opened and the compressed air is continuously supplied from the gas compressor 1 into the container 3 to Automatic opening / closing valve 8a when a predetermined constant pressure is reached
Just close. As a result, the compressed air supplied to the container 3 is exhausted from the nozzle 2 and, along with this, the granular material m is also discharged from the nozzle 2 to the outside.

The discharge amount of the powder or granular material m is quantified by setting the pressure in the container 3 to a predetermined value under the condition that the shape and dimensional conditions of each part such as the nozzle 2 are made constant. be able to. By controlling this pressure value to a desired value, it is possible to continuously and quantitatively eject a small amount of the powder m after adjusting the ejection amount of the powder m to any desired amount. When the compressed air is sequentially discharged from the nozzle 2, the container 3
Although the internal pressure value decreases, when the internal pressure value falls below a certain value, the automatic opening / closing valve 8a opens and the compressed air is replenished in the container 3, so that the internal pressure of the container 3 is maintained at a substantially constant value. As a result, it is possible to continuously carry out the quantitative minute discharge of the powder m.

Further, in the present invention, not only is compressed air continuously supplied from the gas compressor 1 into the container 3, but the automatic opening / closing valve 8a is opened / closed at regular time intervals so that the compressed air is contained in the container 3. May be supplied intermittently. By such intermittent supply of compressed air, it is possible to generate a pulsed pressure wave in the container 3 and forcibly vibrate the granular material m, so that the granular material m is inside the nozzle 2. It is possible to prevent the occurrence of clogging in the interior.

Table 1 shows the test conditions of the discharging method of the powdery or granular material according to the present embodiment. The intermittent supply of compressed gas is 50 [mse
The automatic opening / closing valve 8a was opened / closed every c], and this was repeated until the set pressure was reached.

[Table 1]

In Table 2, the test shown in Table 1 above is continuously tested for 10 minutes, and the average discharge amount per minute when the test is repeated 5 times and the variation coefficient (standard deviation ÷ average discharge amount ×) 100 [%]) is shown.

[Table 2]

Under the test conditions shown in Table 1, the nozzle 2 was not clogged. Further, when the method of discharging the compressed air was changed to either continuous or intermittent, no large change was observed in the coefficient of variation, and there was no adverse effect on the quantitativeness of discharge of the granular material. Furthermore, it was confirmed that an appropriate minute discharge amount can be quantitatively obtained by appropriately selecting the supply pressure of compressed air and the nozzle diameter.

[Second Embodiment (corresponding to Claims 6, 8 and 9)] FIG. 2 is a sectional view of a main part showing a powdery or granular material discharge device Aa according to a second embodiment of the present invention (first embodiment). The same parts as those in the first embodiment are designated by the same reference numerals, and the same applies to other drawings). This discharge device A
a is provided in a state in which it is partially inserted into the discharge pipe 16 for guiding the gas flow supplied from the gas flow supply means 18 and the short pipe portion 17 connected to the upper part of the discharge pipe 16. Container 13 and automatic opening / closing valve 8b for this container 13
It is provided with a powder and granular material storage hopper 4 and the like connected via.

Of the above, the gas flow supply means 18 is, for example, a device configured to supply compressed air in a pulsed jet state by intermittently supplying compressed air at fixed time intervals, or an air pressure. A device that supplies air in a pulsating state that changes periodically is applied.

The container 13 has a flexible soft bag-like fluorine formed at the lower end of a cylindrical container body 13 having a space 30a for accommodating the powder or granular material m therein. A filter cloth 15 made of resin (trade name: Teflon) is clamped and attached by a clamp band 14a.
The filter cloth 15 has a mesh shape corresponding to, for example, 150 mesh, and corresponds to a porous portion having a large number of small holes 15a according to the present invention. m is filled. The container 13 is mounted in a state in which the flange portion 31 attached to the outer periphery of the container 13 is placed on the flange portion 17a of the short pipe portion 17 and clamped by the clamper 32 so that the container 13 is inserted into the short pipe portion 17.
As a result, the filter cloth 15 located at the lower end of the container 13 is arranged in the discharge pipe 16.

The powder m is introduced into the container 13 in the container 13
The automatic opening / closing valve 8b is opened at the time when the filling level of the powder or granules m therein falls below the detection sensor 19, and the powder or granules m in the powder or granule storage hopper 4 falls into the container 13, The container 13 is configured to always contain a certain amount or more of the granular material m. As a result, the granular material m in the filter cloth 15 located at the bottom of the container 13
Is always in a state in which a constant granular material pressure is applied. It should be noted that the operation of charging the powder or granular material m into the container 13 as described above is automatically controlled by the controller 12b.

In the powdery or granular material discharge device Aa having the above structure, compressed air is intermittently supplied from the gas flow supply means 18 into the discharge pipe 16 at regular time intervals while the powdery or granular material m is contained in the container 13. Or a pulsating air supply to generate a gas flow in which the air pressure fluctuates in the discharge pipe 16, the filter cloth 15 is oscillated in a left-right oscillated state by this gas flow. You can Then, this filter cloth 1
The granular material m accommodated in 5 passes through a large number of small holes 15a (mesh holes) of the filter cloth 15 by the vibration operation of the filter cloth 15 and is continuously and quantitatively transferred into the discharge pipe 16 in small amounts. It will be leaked. Therefore, it is possible to continuously and quantitatively discharge a minute amount of the granular material m from the discharge pipe 16 together with the gas flow of the compressed air.

In this example, pulsating air was used as the gas flow, and the test was conducted under the conditions shown in Table 3. The evaluation method is the same as in the first embodiment.

[Table 3]

Table 4 shows the test results. In the test results, no clogging was found in the filter cloth 15, and the discharge concentration of the powdery or granular material could be arbitrarily changed by changing the pulsation cycle or discharge amount of the pulsating air. Further, even if the pulsation cycle was changed, no large variation was found in the coefficient of variation, and there was no adverse effect on the quantitativeness of ejection.

[Table 4]

[Third Embodiment (Corresponding to Claims 6, 7, and 9)] FIG. 3 is a partially cutaway sectional view of a powdery or granular material discharging device Ab according to a third embodiment of the present invention. This discharge device Ab
The basic structure of the discharging device A is shown in the second embodiment.
Although it is common to a, a vibrator 33 for applying vibration to the container 13 is attached to the container 13,
Vibration is applied to the container 13 by the operation of the vibrator 33, and the filter cloth 15 at the tip of the container 13 can be vibrated. In addition, preferably, the container 13 has a short tube portion 17
The filter cloth 15 is mounted in a flexible state with respect to the filter cloth 15 so that the filter cloth 15 vibrates with a sufficiently large amplitude by the vibration of the vibrator 33. Unlike the case of the second embodiment, as the gas flow supply means 18A for supplying the gas flow into the discharge pipe 16, a device for performing a continuous normal blow operation (air supply) without air pressure fluctuation is applied. ing.

In the discharge device Ab having the above structure, the filter cloth 15 is supplied by the gas flow generated by the gas flow supply means 18A.
Although it cannot vibrate positively, the filter cloth 15
The discharge pipe 16 is provided by the vibration applying action of the vibrator 33.
It can be vibrated in the gas flow inside. Therefore, even with such a device configuration, as in the case of the second embodiment, it is possible to continuously and quantitatively discharge the granular material m from the large number of small holes 15a of the filter cloth 15. Grain m
Can be properly guided to a predetermined position by the gas flow.

[Other Embodiments] Incidentally, the discharge device A having the above construction
In the case of b, the same effect can be obtained when a device for performing a hammering operation is provided for the container 13 instead of the vibrator 33. Further, in the present invention described in claims 6 to 9, the whole container 13 may be configured to vibrate, but the invention is not necessarily limited to this, and for example, the filter cloth 15
It is also possible to directly apply mechanical vibration to the part to partially vibrate only the portion of the filter cloth 15.

Further, in the present invention, the filter cloth 15 does not necessarily have to be formed in a bag shape, and the porous portion need not be formed by the filter cloth. For example, as shown in FIG. 4, the container 13A
A filter 15A may be provided at the bottom of the filter, and the powder m may be discharged from this filter hole. In addition to the filter 15A, for example, the container 1
A punching hole may be provided in 3A.

In each of the above-mentioned first to third embodiments, air is used as the medium of the compressed gas or gas flow, but the present invention is not limited to this, and a gas other than air (for example, an inert gas or the like). It goes without saying that) may be used. Besides, in the present invention, the specific type of the powder or granular material m is by no means limited.

[0047]

As can be understood from the above description, according to the method for discharging powdery particles according to the present invention described in claims 1, 2, and 6 to 8, the powdery particles can be manually handled by a worker. Since it is possible to accurately and quantitatively discharge a small amount of trace additive without depending on, it is possible to accurately add a trace amount to a desired main component without manually weighing a trace amount additive in various fields such as foods and pharmaceuticals. As a result, it is possible to obtain a special effect that the work efficiency of the small amount addition work can be improved.

Particularly, according to the present invention as set forth in claim 2,
When the supply of the compressed gas into the container is intermittently performed, it is preferable that the powder particles can clog the nozzle as much as possible. Further, according to the present invention described in claim 8, since the porous portion of the container can be vibrated by the gas flow, it is not necessary to employ a mechanical means such as a vibrator as the vibration imparting means, and the device configuration is simple. There is also an advantage that it can be realized.

According to the discharging apparatus for powder or granules according to the present invention as defined in claims 3 to 5 and 9, the above-mentioned method for discharging powder or granules according to the present invention can be appropriately carried out and is useful.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an example of a powdery or granular material discharge device according to the present invention.

FIG. 2 is a partially cutaway cross-sectional view showing another example of a powder or granular material discharge device according to the present invention.

FIG. 3 is a partially cutaway cross-sectional view showing another example of a powder or granular material discharge device according to the present invention.

FIG. 4 is a cross-sectional view of essential parts showing another embodiment of the container applied to the discharging device for powdery particles according to the present invention.

[Explanation of symbols]

 1 Compressed gas source 2 Nozzle 2a Pipe part 3 Container 4 Powder granule storage hopper 5 Piping 6 Branch piping 7 Pressure setting device 8a-8c Automatic opening / closing valve 9 Upper limit detection sensor 10a, 10b Lower limit detection sensor 11 Pressure detection sensor 12a, 12b Controller 13, 13A Container 14a Clamp band 15 Filter cloth (perforated part) 15a Small hole 15 Filter 16 Discharge pipe 17 Short pipe part 17a Flange part 18,18A Gas flow supply means 19 Detection sensor 20 Piping part 30,30a Space part 31 Flange part 32 Clamper 33 Vibrator m Particles A, Aa, Ab Discharge device for particles

Claims (9)

[Claims] 1. A compressed gas is supplied into a container having a nozzle at its tip, and the internal pressure of the container is maintained within a constant pressure range, so that powder particles in the container are continuously and continuously discharged from the nozzle. A method for discharging a granular material, which comprises discharging quantitatively. 2. The method for discharging a granular material according to claim 1, wherein the compressed gas is supplied into the container continuously or intermittently according to the physical properties of the granular material. 3. A container having a space portion for accommodating powder and granules therein and having a nozzle on the tip side, a compressed gas source for supplying compressed gas into the container, and the compressed gas. And a pressure setting means for maintaining the pressure of the compressed gas supplied from the source into the container within a predetermined pressure range. 4. The pressure setting means according to claim 3,
Controls the supply of compressed gas from the compressed gas source into the container to maintain the pressure value detected by this pressure sensor within the specified pressure range and the pressure sensor for detecting the pressure value inside the container. An apparatus for discharging a powder or granular material, comprising an automatic opening / closing valve. 5. The powder or granular material according to claim 3, wherein the powder or granular material is transferred from the powder or granular material storage hopper connected to the container to maintain the filling amount of the powder or granular material in the container at a predetermined fixed amount. A discharge device for powder or granular material, comprising a supply control means for powder or granular material for performing supply control. 6. A container provided with a porous part having a large number of small holes filled with a powder or granular material, and at least the porous part of the container is vibrated in a gas flow, whereby A method for discharging a powder or granular material, which comprises discharging the powder or granular material continuously and quantitatively into a gas flow from the small holes of the porous portion. 7. The powdery or granular material according to claim 6, wherein the means for vibrating at least the porous portion of the container is means for vibrating the container by mechanical means such as hammering or a vibrator. Discharge method. 8. The powdery or granular material according to claim 6, wherein the means for vibrating at least the porous portion of the container is means for making the gas flow a pulsating flow or a pulsed jet of compressed gas. Discharge method. 9. A container provided with a porous portion having a space portion for accommodating powder and granules therein and having a large number of small holes formed at least on the tip side, and a position where the porous portion of the container is arranged. A gas flow supply means for supplying a gas flow to
By vibrating the porous part of the container in the gas flow, it is configured that the powder or granular material in the container is continuously and quantitatively discharged into the gas flow from the small holes of the porous part. Discharge device for powder particles.