JPH0741082A - Device for feeding powder for powder densification - Google Patents

Abstract

PURPOSE:To obtain a device for feeding powder for powder densification, which can enhance the bulk density of raw material powder and discharge the powder smoothly without causing the bridge phenomenon of this high density powder. CONSTITUTION:A granule feed device is provided with a device body having a tapering peripheral wall 5 shaped smaller toward the lower end, at least one net body 8 arranged along the inner surface of the tapering peripheral wall 5 and elastically supported by the tapering peripheral wall 5 and at least one vibrator 9 for vibrating the net body 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder densification device for powder densification, and in particular to increase the bulk specific gravity of the powder and prevent the bridging phenomenon of the densified powder for smoothing. The present invention relates to a powder supply device for powder densification that can be taken out.

[0002]

2. Description of the Related Art Powder metallurgy industry, ceramic industry, ceramic industry, ferrite industry, resource industry, plastic industry, catalyst industry,
Color material industry, fertilizer industry, agrochemical industry, resource industry, detergent industry,
Powders are handled in various fields such as pharmaceutical industry, cosmetics, food industry, feed industry, bio-related industry and waste treatment industry.

These powders are scattered during handling and pollute the work environment, causing various industrial accidents.
It is difficult to automate and quantify the supply and packaging of powder, and it is bulky, resulting in high packaging and transportation costs and poor handling.

Further, when the powder is composed of a plurality of components, segregation easily occurs during handling due to the difference in density, shape, size, etc. of the respective components, and it must be handled with great care.

To solve these problems, it has been attempted to improve the bulk density by granulating the powder or crushing it after preforming and adjusting the particle size with a sieve.

[0006]

However, in the case of granulating powder in this way, various granulation methods, that is, grasping the characteristics of the powder material, and determining the binder in relation to the properties of the granulated product. Various methods are adopted after selecting and further determining the conditions during the granulation operation.

Concretely, for example, rolling granulation method, compression granulation method, stirring granulation method, extrusion granulation method, crushing granulation method, vacuum granulation method, melt granulation method or spray drying. A granulation method or the like is adopted, and a special device corresponding to each method is used.

[0008] However, when such a method is adopted, the powder is granulated by using the device corresponding to each method, but this not only increases the initial cost, but also makes complicated manufacturing. Since granulation is performed through the steps,
Granulation cost is high.

On the other hand, when the method of pulverizing the powder after preforming and adjusting the particle size with a sieve is adopted, the number of manufacturing steps becomes large and the manufacturing cost becomes high, and as a result of adjusting the particle size, the yield is poor. Become.

By the way, when a predetermined amount of the powder having the improved bulk density is put into a packaging material formed of paper, plastic, or the like and subdivided, generally, a hopper having a tapered peripheral wall of a taper shape is formed. Is supplied from the lower end to the packaging material through the discharge passage.

However, in this case, since the powder is supplied into the packaging material from the lower end of the hopper provided with the taper peripheral wall of the taper downward shape through the discharge passage, the space between the powders becomes smaller than a certain value, and the powders are As a result of so-called bridge phenomenon, in which powders cannot be smoothly supplied because they block each other and solidify into a convex lens shape and do not fall downward, in order to prevent this bridge phenomenon, for example, JP-B-43-145.
As disclosed in Japanese Patent Laid-Open No. 26-26, it is proposed to include a net body arranged along the inner surface of the tapered peripheral wall and elastically supported by the tapered peripheral wall, and a vibrator for vibrating the net body. .

In the bridge phenomenon preventing device disclosed in Japanese Patent Publication No. 43-14526, the taper peripheral wall is not directly elastically deformed, but the raw material powder forming the bridge is directly vibrated. Larger vibration energy can be transmitted to the raw material powder.

However, in this device, since the net body is arranged over the entire circumference along the inner surface of the taper peripheral wall of the device, the effect of breaking the bridge in the space surrounded by the net body is small and the bulk density is low. If it exceeds a certain level, a bridge may be formed in the space surrounded by the net body which is the main passage of the raw material powder.

Further, in this case, some effect can be recognized when the compressibility of the raw material powder, that is, the compressed ratio of the raw material powder before and after tapping is large, but when the compressibility of the raw material powder is low, the raw material powder is compressed. Since the bulk density of the powder has almost no change and the raw material powder is simply discharged as it is, it scatters when handling the powder, polluting the work environment and causing various industrial accidents. It is difficult to automate and quantify body supply, packaging, etc., and it has the same problems as in the above case, such as being bulky, increasing packaging costs and transportation costs, and having poor handleability.

That is, since the vibration transmission surface is formed of a thin round bar or a wire-shaped screen, the amount of vibration transmission to the powder is small, and although the flow effect can be expected to some extent, the bulk density is improved. The effect of making it possible is hardly expected, and conversely, as a result of dispersion and loosening of the powder, there is a possibility that the bulk density of the raw material powder is hardly changed and the raw material powder is simply discharged as it is.

In the present specification, the degree of compression [Chemical engineering dictionary (published by Maruzen Co., Ltd., edited by The Chemical Engineering Society)] is a value measured by the following method. Inner diameter 50 mm, volume 1
A powder is filled in a 00 ml cylindrical container through a sieve having an opening of 710 μm, and the powder is scraped on the upper surface of the cylindrical container, and the bulk density (loose apparent specific gravity) is set to A. next,
Set the tapping device (Hosokawa Micron's powder property measuring device, Powder Tester PT-N type) to drop height 18
If the bulk density (solidified apparent specific gravity) obtained by tapping the powder on the upper surface of the cup container after removing tapping for 3 minutes under the condition of 60 times / 1 minute for 3 minutes, that is, 180 times, is P , The compression degree C is a value obtained by the following equation.

C = 100 (PA) / P (%)

Further, in this apparatus, since a wire-shaped screen is laid all around the inner surface of one hopper and this screen is operated by one vibrator, uncontrollable resonance occurs and strength is weak. There is a possibility that a rupture phenomenon will occur and stable operation cannot be expected.

The present invention has been completed in view of the above technical problems, and comprises an apparatus main body having a tapered peripheral wall formed in a downward taper shape, and is arranged along the inner surface of the tapered peripheral wall. Moreover, by providing at least one net body elastically supported by the tapered peripheral wall and at least one vibrator vibrating the net body, it is possible to increase the bulk density of the raw material powder and to increase the density. It is an object of the present invention to provide a powder supply device for powder densification that can smoothly discharge the powder without causing a bridge phenomenon.

[0020]

In order to achieve the above-mentioned object, the present invention has a device main body having a tapered peripheral wall formed in a downward taper shape, and is arranged along the inner surface of the tapered peripheral wall. , And at least one vibrator that vibrates the net body, and the technical means is provided.

However, in the powder densifying device for powder densification of the present invention, when one net body and one vibrator for vibrating the net body are provided, the net body driven by the vibrator is As a result, since it is not possible to superimpose vibrations in different directions on the powder in a superimposed manner, the bulk density of the powder cannot be improved so much that it takes time to improve the bulk density of the powder. Depending on the powder,
In some cases, it may not be possible to improve the desired bulk density.

In this case, the effect is recognized especially when the raw material powder has a high compressibility, but when the raw material powder has a low compressibility, it takes time to improve the bulk density of the powder, and depending on the powder, It may not be possible to achieve the desired improvement in bulk density.

Therefore, in the present invention, in particular, there are a plurality of nets, and the plurality of nets are arranged at appropriate intervals along the inner surface of the tapered peripheral wall and are arranged so as to face in different directions. , A plurality of vibrators that are elastically supported by the tapered peripheral wall and that individually vibrate each net body, by which vibrations in different directions can be superimposedly applied to the powder. Most desirable.

The net body according to the present invention may be arranged as long as a plurality of net bodies are arranged at appropriate intervals along the inner surface of the tapered peripheral wall and face different directions.
For example, a plurality of nets may be arranged at equal intervals in the circumferential direction, or a pair or a plurality of pairs of nets may be arranged to face each other.

The material of the net body of the present invention is not particularly limited, but it is thin and the required mechanical strength is obtained.
It is preferable to use a metal having rigidity and elasticity in harmony, for example, a single metal material such as iron, nickel and cobalt, or an alloy material such as stainless steel and 13-chrome steel,
Furthermore, for example, a metal material which has been subjected to surface treatment such as surface quenching, carburizing, chrome plating, etc., which enhances wear resistance, can be used.

Further, each net in the present invention is, for example, a net formed by arranging metal wires in a grid pattern or knitting the metal wires and welding the intersections of the metal wires to each other, or a net made of a perforated metal plate. Plates can be used.

Among these, perforated metal that does not generate foreign matters such as metal fragments, welding slag powder, and welding material powder, is easy to wash or clean the mesh, and can be easily and inexpensively manufactured. It is recommended to use a mesh plate made of plates.

In the present invention, each vibrator may be configured to vibrate each net individually, for example, to vibrate each net in the direction along the peripheral wall, or the axial center of the peripheral wall. It is possible to make a linear reciprocating vibration toward, or to make each net body oscillate and vibrate toward the axial center of the peripheral wall.

Here, the vibration cycle of each vibrator may be the same or different, the vibration phase of each vibrator may be the same or different, and further, the vibration cycle and the vibration phase of each vibrator. May be synchronized, and the amplitude of each mesh may be the same or different.

By the way, in the present invention, when the powder having the improved bulk density is once taken out in the apparatus, if there is a risk that the high density powder is loosened and the bulk density is lowered, the discharge section of the apparatus main body is A screw for forcibly discharging the densified powder may be provided on the vertical axis, or a screw for forcibly transferring the densified powder in the lateral direction may be provided below the discharge portion of the apparatus main body.

[0031]

According to the present invention, there is provided an apparatus main body having a taper peripheral wall formed in a tapered shape, and at least one net body arranged along the inner surface of the taper peripheral wall and elastically supported by the taper peripheral wall. , And at least one vibrator that vibrates the net body.

However, in the powder densifying device for powder densification of the present invention, when one net and one vibrator for vibrating the net are provided, the powder bridging phenomenon is prevented. However, since only one net is driven by the vibrator, it is not possible to superimpose vibrations in different directions on the powder in a superimposed manner. As a result, depending on the powder, the bulk density of the powder can be improved to some extent. In some cases, it may be impossible to improve the bulk density of the powder, and it may not be possible to improve the desired bulk density.

Therefore, in the present invention, there are a plurality of mesh bodies, and the plurality of mesh bodies are arranged along the inner surface of the taper peripheral wall at appropriate intervals and face in different directions. When a plurality of vibrators that are elastically supported by the tapered peripheral wall and individually vibrate each net body are provided, the plurality of net bodies are driven by the vibrators and vibrate independently of each other, so the vibration directions are different. As a result, vibrations having different directions are superposedly applied to the raw material powder, and as a result, the bulk density of the powder is significantly improved.

Further, in the present invention, since it is configured in this way, even if the bulk density of the powder is remarkably increased and the mechanical balance is not broken against the vibration applied in one direction, The mechanical balance between the raw material powders is disturbed by the vibrations applied in the direction of or the vibrations applied in the composite direction in which these are superimposed, and the densified powders are smoothly discharged without forming bridges. It has the ability to do so.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A powder densification powder supply device according to an embodiment of the present invention will be specifically described below with reference to the drawings. As shown in the front view of FIG. 1, a powder densification powder supply device according to an embodiment of the present invention includes a device main body 1 and two pairs of front and rear columns 2 that support the device main body 1 at a predetermined height. , And a pair of left and right bridge breakers 3.

The apparatus body 1 has a cylindrical portion 4, a taper peripheral wall 5 having a downward tapered shape continuous to the lower end thereof, a discharge portion 6 continuous to the lower end of the tapered peripheral wall 5, and the discharge portion 6 is opened and closed. And a shutter 7.

The tapered peripheral wall 5 has a rectangular cross section,
Although it may be formed in any closed geometrical shape such as a polygon such as a hexagon and an octagon, a circle, and an ellipse, in this embodiment,
It is formed in a circular shape in order to make the flow of the raw material powder on the inner surface uniform and to discharge the raw material powder in a homogeneous state.

The axis of the tapered peripheral wall 5 may be inclined, but in this embodiment, in order to make the flow of the raw material powder on the inner surface uniform and to discharge the raw material powder in a homogeneous state. The axis is vertical.

Further, in order to maintain the homogeneity of the raw material powder discharged from the discharging part 6, the discharging part 6 is arranged coaxially with the tapered peripheral wall 5.

Further, each bridge breaker 3 has one net body 8
And a vibrator 9 that vibrates each mesh body 8. As shown in the layout diagrams of FIGS. 1 and 2, both mesh bodies 8 are arranged inside the apparatus main body 1 along the inner surface of the tapered peripheral wall 5. It is arranged at the opposite position.

The material of each mesh 8 is not particularly limited, but it is preferable to use a metal that is thin and obtains the required mechanical strength, and has rigidity and elasticity in harmony, such as iron and nickel. , Single metal materials such as cobalt, or alloy materials such as stainless steel and 13-chrome steel,
Further, for example, a metal material that has been subjected to surface treatment such as surface quenching, carburizing, chrome plating, etc. to enhance wear resistance can be used. In this embodiment, the net body 8 is made of stainless steel.

Each mesh 8 may be formed, for example, by arranging or knitting metal wires in an appropriate space in a grid pattern and knitting them, and welding the intersections thereof, but in this embodiment, metal fragments are formed. No foreign matter such as slag, welding slag powder, or welding material powder is generated,
The mesh plate 8 is formed of a perforated metal plate that can be easily and inexpensively washed and cleaned easily.

That is, as shown in the front views of FIGS. 2 and 3, each mesh member 8 has a main surface 10 formed into a fan-shaped curved surface along the inner surface of the tapered peripheral wall 5, and both end edges thereof are bent inward. The main surface 10 is provided with a large number of through holes 10a formed by punching.

The lower central portion of the main surface 10 is provided with the elastic support device 12, and the left and right side portions of the upper portion are provided with the elastic body 3.
3 are elastically supported by the tapered peripheral wall 5 and are connected to the vibrator 9.

Although the main surface 10 and the elastic supporting device 12 may be fixed to each other, in this embodiment, the net body 8 is attached to the main body 1 of the device.
The main surface 10 is connected for easy disassembly from the elastic support device 12 for easy removal and cleaning.

That is, the elastic support device 12 is elastically supported by the tapered peripheral wall 5 via the elastic body 13 fixed to the tapered peripheral wall 5, as shown in the sectional view of FIG. 4, for example. The engaging member 14 is provided.

The elastic body 13 is a truncated cone-shaped cup portion 1.
5 and a flange portion 16 that extends outward from its large-diameter end portion. The cup portion 15 is inserted into a hole 17 formed in the tapered peripheral wall 5 to project into the main body 1 of the apparatus. 16
Is fixed to the outer surface of the tapered peripheral wall 5 together with the washer 18 and the presser plate 19, so that the engaging member 14 fixed to the tip of the cup portion 15 is inwardly moved within the apparatus main body 1 by a predetermined distance from the inner surface of the tapered peripheral wall 5. I am trying to position it.

The engaging member 14 is the main surface 1 of the net body 8.
A pair of inner and outer disc-shaped brims 20 and 21 and both brims 20 that face each other with a space slightly larger than the plate thickness of 0.
And a shaft portion 22 that connects the central portions of the two.

On the other hand, as shown in FIG.
A circular hole 23 having a diameter slightly larger than that of the collar 20 and a groove 24 continuous from the upper edge of the circular hole 23 and slightly wider than the shaft portion 22 are formed in the lower center of the main surface 10 of the. The engagement hole 25 is formed.

Then, the collar 20 inside the engaging member 14 is passed through the circular hole 23, and the main surface 1 is provided between the collar portions 20 and 21.
After positioning 0, the net body 8 is lowered and the shaft portion 22 of the engaging member 14 is inserted into the groove 24 of the engaging hole 25, whereby the lower portion of the net body 8 is connected to the elastic support device 12. The mesh body 8 is elastically supported by the tapered peripheral wall 5 via the elastic body 13.

On the contrary, by pulling the net body 8 upward from this state and letting out the inner collar 20 from the circular hole 23, the lower portion of the net body 8 is disassembled from the elastic body 13 and the tapered peripheral wall 5.

As shown in FIG. 1, the vibrator 9 includes, for example, a T-shaped vibrating frame 26 arranged outside the tapered peripheral wall 5, and three connecting shafts connected to respective ends of the vibrating frame 26. 27 and 28, and an electric vibrator 31 fixed to the vibrating frame 26 and elastically supported by the tapered peripheral wall 5 via the spring 29 and the bracket 30, for example.

As shown in FIG. 4, the connecting shaft 27 connected to the lower end portion of the vibrating frame 26 penetrates the hole 16 of the tapered peripheral wall 5 and the cup portion 15 of the elastic supporting device 12 to the engaging member 14. Be connected.

The connecting shaft 28 connected to both ends of the upper portion of the vibrating frame 26 is, for example, as shown in the sectional view of FIG.
The main surface 10 of the apparatus main body 1 is connected to the upper end portion through the hole 32 of the tapered peripheral wall 5 and the hat-shaped elastic body 33 that closes the hole 32.

The tip of the connecting shaft 28 may be fixed to the net 8. In this embodiment, in order to remove the net body 8 from the apparatus main body 1 so that it can be easily cleaned, the main surface 1
0 is connected so that it can be easily disassembled from the connecting shaft 28.

That is, as shown in the sectional view of FIG. 5, one of the hinge plates 35 of the hinge 34 is provided at the inner end of the connecting shaft 28.
Is fixed to the top edge of the other butterfly plate 37, which is swingably connected to the upper edge of the butterfly plate 35 via a pin 36.
8 is rotatably supported, and the bolt 38 is screwed into the tip of the one butterfly plate 35, so that the hinge 34 can be held in a closed state.

The bolt 38 is unscrewed from the one butterfly plate 35 so that the one butterfly plate 35 of the hinge 34 receives the upper edge of the main surface 10 with the hinge 34 opened, and then the hinge 34 is removed. Closed, the tip of the bolt 38 is inserted into the insertion hole 39 formed in the main surface 10, and the one butterfly plate 3 is further inserted.
The upper edge portion of the net body 8 is connected to the connecting shaft 28 of the vibrator 9 by screwing the main surface 10 between the butterfly plates 35 and 37 by screwing the main surface 10 between them.

From this state, loosen the bolt 38,
By opening the hinge 34, the mesh plate 7 can be released from the connecting shaft 28.

As shown in FIG. 3, the main surface 1 of the net body 8 is
A stopper 40 for preventing the lateral displacement of the hinge 34 is provided on the inner side surface (which may be the outer side surface) of 0 as necessary.

The elastic body 33 has the same structure as the elastic body 13 shown in FIG. 4, and the washer 4 is attached to the outer surface of the tapered peripheral wall 5.
1 and the presser foot 42 are fixed, and the elastic body 3
The above-mentioned hinge 34 fixed to No. 3 is located inside the apparatus main body 1 by a predetermined distance from the inner surface of the tapered peripheral wall 5.

In this powder densification device for powder densification, when the vibrator 31 of both vibrators 9 is operated, the vibrating frame 26, the connecting shafts 27 and 28, and the mesh body 8 cause the spring 2 to move.
9 and the connection point of the bracket 30 as an intersection, each elastic body 1
Within the range of elastic deformation of 3.33, it vibrates in the up-down direction, the left-right direction, and the direction toward the axis of the tapered peripheral wall 5, and transmits the vibration from the left and right sides to the raw material powder forming the bridge in the tapered peripheral wall 5. To do.

If any one of the vibration period, the vibration phase, and the amplitude of the two vibrators 31 is made different, the intervals, the inclinations, etc. of the two mesh plates 7 are slightly deviated, and the force in the complicated direction is applied to the raw material powder. Act in a superimposed manner, the mechanical balance between the raw material powders is easily broken, the bridge collapses, and the densified raw material powder, that is, the raw material powder having a large bulk density is discharged through the discharge portion 6. Become so.

However, even if the vibration periods, the period phases, and the amplitudes of both the exciters 31 are the same, variations in the reaction force received by the nets 8 occur due to variations in the bulk density of the raw material powder inside, and this It is possible to break the mechanical balance between the raw material powders so as to deal with variations in reaction force.

Further, in particular, when the vibration periods of both exciters 31 are the same and the vibration phases are different by 180 degrees, the vibrations applied from both sides are multiplied by each other.
The bridge of the raw material powder can be strongly broken and the bulk density can be efficiently increased.

In the above embodiment, the main surface 10 of the net body 8 is formed into a fan-shaped curved surface, but in the present invention,
It does not prevent forming the shape of the main surface 10 into other shapes such as a square, a rectangle, a triangle, a circle, and an ellipse.

Further, in the above embodiment, the net body 8 is formed of a perforated metal plate, but in the present invention, the net members are knitted or arranged in a grid and welded to each other. The body may be used.

In addition, in the above embodiment, two nets 8 are used.
Are arranged at positions facing each other in the device body 1, but, for example, as shown in the layout diagram of FIG. 6, two nets 8 are arranged in the device body 1 in a direction in which their main surfaces 10 are orthogonal to each other. , Or the three nets 8 are separated from each other about the axis of the device body 1 as shown in the layout of FIG.
It can be placed every 0 degrees, or as shown in the layout of FIG.
It is possible to arrange the net bodies 8 in order at 90 degree intervals with the axis of the apparatus main body 1 as the center.

In this case, for example, when a screen is stretched around the entire circumference, 3 units are used for a 1000 mm diameter hopper, 4 units are used for a 1500 mm hopper, and 2000 mm are used.
In the hopper, it is possible to attach six vibrating bodies. With this structure, the vibration energy applied to the powder is several times, and the bulk density is improved in a short time.

Then, by configuring in this way,
It is extremely easy to control the vibration transmission area per one vibrating body and design enough for overall balance and strength retention so that unnecessary vibration does not occur between the vibrating body and the mesh structure and mesh support structure. Will be possible.

In the present invention, although there is a possibility that the bulk density may be loosened by loosening the high density powder when the powder having the improved bulk density is once taken out in the apparatus, the device is not shown in the drawing. A screw for forcibly discharging the densified powder may be provided on the vertical axis in the discharge part of the main body, or a screw for forcibly transferring the densified powder in the lateral direction may be provided below the discharge part of the apparatus main body. is there.

Next, the following densification experiment of the raw material powder was conducted by using the powder densification powder supply apparatus of the present invention shown in FIGS. 1 and 2.

Test 1 That is, after 320 l of magnesium stearate (manufactured by Nitto Kasei Co., Ltd., average particle size 18.55 μm, compression degree 46.2%) was put into the apparatus shown in FIGS. FIG. 9 shows the relationship between the volume change and the time when the vibrator 9 is continuously operated. In this case, it was not added while sieving, and therefore, the bulk density was measured at the stage of dynamic apparent specific gravity, that is, at the stage of being loosened apparent loose specific gravity (hereinafter the same).

Incidentally, the data shown in FIG.
The volume is obtained from the position of the magnesium stearate powder surface every predetermined time.

Test 2 In addition, in the apparatus shown in FIGS. 1 and 2, calcium carbonate (P-30 manufactured by Shiraishi Industry Co., Ltd., average particle size 7.4 μm, compression degree 2)
FIG. 10 shows the relationship between the volume change and the time when the vibrators 9 in this apparatus were continuously operated after being charged into the 38.7 l of 2.8% while being sieved.

The data shown in FIG. 10 is obtained by providing a window in the apparatus and determining the volume from the position of the calcium carbonate powder surface at every predetermined time.

Test 3 When a conventional bridging phenomenon preventing device was used to perform the same tests as in Test 1 and Test 2, the loosening phenomenon of the powder occurred and the volume change, that is, the improvement of the bulk density was almost recognized. There wasn't.

From the above results, it is confirmed that the powder densifying device for powder densification of the present invention is extremely effective in improving the bulk density of powder.

[0078]

The powder densifying device for powder densification of the present invention has a device main body having a taper peripheral wall formed in a downward taper shape, and is arranged along the inner surface of the taper peripheral wall. At least one elastically supported by the tapered peripheral wall
Since one net body and at least one vibrator for vibrating the net body are provided, the bulk density of the raw material powder can be increased and the densified powder can be produced without causing a bridge phenomenon. Therefore, it has the effect of smoothly discharging.

In the powder densifying device for powder densification of the present invention, the bridge phenomenon of powder is prevented especially when one net and one vibrator for vibrating the net are provided. However, since only one net is driven by the vibrator, it is not possible to superimpose vibrations in different directions on the powder in a superimposed manner. As a result, depending on the powder, the bulk density of the powder can be improved to some extent. In some cases, it may be impossible to improve the bulk density of the powder, and it may not be possible to improve the desired bulk density.

Therefore, in the present invention, there are a plurality of nets, and the plurality of nets are arranged along the inner surface of the taper peripheral wall at appropriate intervals and face different directions. When a plurality of vibrators that are elastically supported by the tapered peripheral wall and individually vibrate each net body are provided, the plurality of net bodies are driven by the vibrators and vibrate independently of each other, so the vibration directions are different. As a result of superposing vibrations in different directions on the raw material powder, the bulk density of the powder is remarkably improved.

In the powder supply apparatus for powder densification of the present invention, the density of powder can be increased by this apparatus alone.
This densified powder can be discharged smoothly without causing a bridge phenomenon, and since this device can improve the bulk density of the powder in this way, Since it is difficult to scatter when handling, the work environment is not polluted, and as a result, occupational accidents can be prevented as much as possible.
Further, the powder has effects such as easy supply, packaging and the like, automation, quantification and downsizing, a low packaging cost and transportation cost, and a good handleability.

Further, in the present invention, the powder is composed of a plurality of components, and even if there is a difference in density between these components, since the powder is clogged, segregation does not occur during handling, and it is easy. It is possible to handle it.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a layout view of a mesh body showing an embodiment of the present invention.

FIG. 3 is a front view of a net body suitably used in one embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of an attachment portion of a net body that is preferably used in an embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of an attachment portion of another mesh body preferably used in the present invention.

FIG. 6 is a layout view of a mesh body showing another embodiment of the present invention.

FIG. 7 is a layout view of a net body according to still another embodiment of the present invention.

FIG. 8 is a layout view of a mesh body showing still another embodiment of the present invention.

FIG. 9 is a characteristic diagram showing the relationship between the volume change of powder and time when each vibrator is continuously operated in the device of one embodiment of the present invention.

FIG. 10 is a characteristic diagram showing a relationship between a change in volume of another powder and time when each vibrator is continuously operated in the apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 1 Device main body 5 Tapered peripheral wall 8 Net body 9 Vibrator

Claims (12)

[Claims] 1. An apparatus main body having a tapered peripheral wall formed in a downward tapered shape, at least one net body arranged along an inner surface of the tapered peripheral wall and elastically supported by the tapered peripheral wall, A powder supply device for powder densification, comprising: at least one vibrator for vibrating a net body. 2. A plurality of mesh bodies, the plurality of mesh bodies being arranged at appropriate intervals along the inner surface of the tapered peripheral wall and arranged so as to face in different directions, and to the tapered peripheral wall. The powder supply device for powder densification according to claim 1, further comprising a plurality of vibrators that are elastically supported and that individually vibrate each net body. 3. The powder densification powder supply device according to claim 1, wherein the plurality of nets are arranged at equal intervals in the circumferential direction. 4. A pair or a plurality of pairs of nets are arranged to face each other in each pair.
The powder supply device for powder densification according to any one of 1. 5. The powder supplying apparatus for densifying powder according to claim 1, wherein the mesh is made of a perforated metal plate. 6. The powder densification powder supply device according to claim 1, wherein the vibrator reciprocally vibrates the net body toward the axial center of the peripheral wall. 7. The powder densification powder supply device according to claim 1, wherein the vibrator causes the net body to oscillate and vibrate toward the axial center of the peripheral wall. 8. The powder densification powder supply device according to claim 1, wherein the vibrators have different vibration cycles. 9. The powder supply apparatus for powder densification according to claim 1, wherein the vibrators have different vibration phases. 10. The powder densifying device for powder densification according to claim 1, wherein the vibration cycle and vibration phase of each vibrator are synchronized. 11. The powder densifying device according to claim 1, wherein the nets have different amplitudes. 12. The powder densification powder supply device according to claim 1, wherein the nets have the same amplitude.