JPH1111670A - Distributing device for powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To distribute powder without changing the grain size distribution of powder by arranging a spindle-shaped cone at the outlet of a powder feed pipe, locating the apex of the spindle-shaped cone at the outlet center section of the powder feed pipe, and arranging distribution destinations at the equally split positions in the peripheral direction of the bottom section periphery of the spindle-shaped cone respectively. SOLUTION: A conical cone 14 is arranged at the outlet of a powder feed pipe 11 at the center in a distribution chamber 13 in this powder distributing device 10. The apex of the conical cone 14 is located at the outlet center section of the powder feed pipe 11, and masses 12A-12D are located at four split positions in the peripheral direction of the bottom section periphery of the conical cone 14. Sharp guides 15 with a double-flow triangular cross sectional shape are provided at four boundaries between adjacent masses 12A, 12B; 12B, 12C; 12C, 12D; and 12D, 12A between the bottom section of the conical cone 14 and the inlets of the masses 12A-12D respectively. Powder is uniformly slid down on the conical cone 14 and the sharp guides 15 and is uniformly distributed to the masses 12A-12D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for distributing powder.

[0002]

2. Description of the Related Art Conventionally, as a powder distribution device,
There is one described in JP-23222. In this prior art, when distributing powder supplied from a vertically-standing powder supply pipe to a plurality of chutes below, a scraper rotating with a plurality of blades is disposed at an outlet of the powder supply pipe, and the scraper is disposed. The powder is distributed to each chute by the rotation of.

[0003]

However, the prior art has the following problems. The distribution of the powder by the scraper is to stir the powder, and there is a possibility that the powder may be crushed to change the particle size distribution.

The amount of powder distribution from the powder supply pipe to the chute side is adjusted by changing the number of revolutions of the scraper. To increase the amount of distribution, the scraper must be rotated at high speed. The change in particle size distribution due to crushing of the body may be further remarkable, and the product specification of the powder may be impaired.

An object of the present invention is to distribute powder without changing the particle size distribution of the powder.

Another object of the present invention is to adjust the amount of powder distribution without changing the particle size distribution of the powder.

[0007]

According to a first aspect of the present invention, there is provided a powder distribution apparatus for distributing powder supplied from a powder supply pipe to a plurality of distribution destinations below. The cone is placed at the outlet of the cone, the apex of the cone is facing the center of the outlet of the powder supply pipe, and the distribution destination is arranged at each of the circumferentially equally divided positions around the bottom of the cone. It is like that.

According to a second aspect of the present invention, in the first aspect of the present invention, a powder distribution amount is further adjusted by changing a distance between an outlet end of the powder supply pipe and a conical cone. It is made possible.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a powder distribution amount adjusting cylinder is further provided between the outlet end of the powder supply pipe and the conical cone. The powder distribution amount adjustment cylinder moves up and down around the outlet end of the powder supply pipe, and the amount of powder passing around the cone can be adjusted by increasing or decreasing the interval with the cone. It is intended to be.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the powder distribution amount adjusting cylinder is further divided into the same number as a plurality of distribution destinations at the lower bottom of the bottom of the conical cone.
Each of the divided cylinders can be independently slid up and down around the outlet end of the powder supply pipe.

[0011] The present invention described in claim 5 provides the invention according to claims 1-4.
In the present invention as described in 1 above, the cone-shaped cone can be vibrated.

According to the first aspect of the present invention,
Has the effect of The powder supplied from the powder supply pipe is evenly distributed around the apex of the conical cone, slides down around the conical cone, and is evenly distributed to each distribution destination below. At this time, the powder is distributed only by sliding down around the cone, and no mechanical distribution force is applied.
It is distributed without being crushed and without changing its particle size distribution.

According to the above, the structure is simplified without involving a mechanical distribution force applying device.

According to the second and third aspects of the present invention, the following operations are provided. To adjust the powder distribution amount from the powder supply pipe to the distribution destination, slide the powder distribution amount adjustment cylinder provided around the outlet end of the powder supply pipe up and down, and adjust the powder distribution amount adjustment cylinder and cone cone. This is done by increasing or decreasing the gap between the two. Therefore, there is no need to increase the mechanical distribution force to increase the distribution amount, and the powder is not crushed. Therefore, the distribution amount can be adjusted without changing the particle size distribution.

The distribution amount is unstable due to variations in the bulk specific gravity of the powder (the distribution weight changes even if the distribution volume is the same)
In such a case, the distribution amount can be stabilized by sliding the powder distribution amount adjusting cylinder or the like.

According to the present invention, there is provided the following operation. By dividing the powder distribution amount adjusting cylinder into a plurality of division cylinders, the distribution amount (distribution balance) of the powder supplied from a single powder supply pipe to each distribution destination can be adjusted.

According to the fifth aspect of the present invention, the following operations are provided. By vibrating the cone, it is possible to stabilize the flowability of the powder around the cone and to improve the distribution of the powder.

[0018]

FIG. 1 is a basic view of the present invention, FIG. 2 is a longitudinal sectional view showing a first embodiment, FIG. 3 is a perspective view showing the first embodiment, and FIG. FIG. 5 is a schematic view showing a fully opened state of the powder distribution amount adjusting cylinder, FIG. 6 is a schematic view showing a fully closed state of the powder distribution amount adjusting cylinder, and FIG. 7 is a powder distribution amount adjustment. FIG. 8 is a schematic view showing an independent adjustment state of the divided tubes, FIG. 8 is a perspective view showing a second embodiment, FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8, and FIG. 10 shows a third embodiment. FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 10, and FIG.
FIG. 13 is a longitudinal sectional view showing a fifth embodiment, and FIG. 14 is a longitudinal sectional view showing a sixth embodiment.

(First Embodiment) (FIG. 1 to FIG. 7) As shown in FIG. 1 to FIG. 4, the powder distribution device 10 continuously drops by a gravity from a powder supply pipe 11 which is set up vertically. The powder to be supplied is distributed to four
A to 12D. The outlet end of the powder supply pipe is connected to a rectangular box-shaped distribution chamber 13, and a mass 1 is provided at each of four corners inside the distribution chamber 13.
2A to 12D are provided.

The powder dispensing device 10 has a conical cone 1 at the outlet of the powder supply pipe 11 at the center of the inside of the distribution chamber 13.
4 are arranged. The apex of the conical cone 14 faces the center of the outlet of the powder supply pipe 11, and the masses 12 </ b> A to 12 </ b> D are arranged at four positions in the circumferential direction around the bottom of the conical cone 14.
Are made to correspond to each other. Between the bottom of the conical cone 14 and the entrance of the masses 12A to 12D, the adjacent mass 1
2A and 12B, 12B and 12C, 12C and 12D, 12
At each of the four boundaries between D and 12A, a sharp guide 15 with a double triangular cross section is provided. As a result, the powder supplied from the powder supply pipe 11 is
Diverges evenly around the apex of the cone 1
It slides down four turns, and further slides down guided by each sharp guide 15, and is evenly distributed to each of the masses 12A to 12D. That is, the powder is divided into triangular cross-section sharp guides 15.
Are distributed so as to match the diameters of the masses 12A to 12D. Here, from each sharp guide 15 to the square 12
Since A to 12D are slopes, all powder after sliding down distribution is surely distributed to the masses 12A to 12D.

The powder distributing device 10 has a powder distributing amount adjusting cylinder 16 between the outlet end of the powder supply pipe 11 and the conical cone 14.
Is provided. The powder distribution amount adjusting cylinder 16 has the same inner diameter as the maximum outer diameter of the conical cone 14 and slides up and down around the outlet end of the powder supply pipe 11 to increase or decrease the gap with the conical cone 14. This makes it possible to adjust the distribution amount of powder that slides down around the conical cone 14 and passes therethrough. The distribution amount (weight) from the powder supply pipe 11 to the masses 12A to 12D is:
Since the powder varies depending on the change in the bulk specific gravity of the powder, the change in the fluidity, and the like, the slide of the powder distribution amount adjusting cylinder 16 allows the powder having the desired weight to be distributed to the masses 12A to 12D. The sliding of the powder distribution amount adjusting cylinder 16 may be manual or automatic. As means for automatically sliding the powder distribution amount adjusting cylinder 16, a multi-stage cylinder, a stepping motor, a servomotor, or the like can be employed. FIG. 5 is a fully opened state in which the powder distribution amount adjusting cylinder 16 has been slid to the uppermost position.
The distribution amount (volume amount) to the masses 12A to 12D becomes maximum. FIG. 6 shows a fully closed state in which the powder distribution amount adjusting cylinder 16 is slid to the lowest position, and the distribution to the masses 12A to 12D is stopped.

The powder dispensing device 10 includes a powder dispensing amount adjusting cylinder 1.
6 are divided into four divided cylinders 1 corresponding to the respective distribution destinations 12A to 12D around the bottom of the conical cone 14.
It is divided into 6A to 16D. Then, as shown in FIG. 7, each of the divided cylinders 16A to 16D can be independently slid up and down around the outlet end of the powder supply pipe 11. Thereby, the distribution amount (distribution balance) of the powder supplied from the single powder supply pipe 11 to each of the masses 12A to 12D can be adjusted. The sliding of the divided cylinders 16A to 16D may be performed manually or automatically. As means for automatically sliding the divided cylinders 16A to 16D, a multi-stage cylinder, a stepping motor, a servomotor, or the like can be employed. FIG. 7 shows that the divided cylinders 16A and 16B are relatively high,
16D is set at a relatively low level, the distribution amount (volume amount) to the masses 12A and 12B is large, and the distribution amount (volume amount) to the masses 12C and 12D is small.

The powder distributor 10 has a vibrator 17 connected to a conical cone 14. The vibrator 17 causes the conical cone 14 to slightly vibrate when necessary, and stabilizes the powder sliding property around the conical cone 14.

Therefore, according to the present embodiment, the following operations are provided. The powder supplied from the powder supply pipe 11 is evenly distributed around the apex of the conical cone 14, slides down around the conical cone 14, and is evenly distributed to the lower masses 12A to 12D. I'm sullen. At this time, the powder is distributed only by sliding down around the conical cone 14,
Since no mechanical distribution force is applied, the particles are distributed without being crushed and without changing the particle size distribution.

As described above, the structure is simplified without involving a mechanical distribution force applying device.

From the powder supply pipe 11 to the masses 12A to 12D
The powder distribution amount is adjusted by sliding the powder distribution amount adjustment tube 16 provided around the outlet end of the powder supply pipe 11 up and down to adjust the gap between the powder distribution amount adjustment tube 16 and the conical cone 14. This is done by increasing or decreasing. Therefore, there is no need to increase the mechanical distribution force to increase the distribution amount, and the powder is not crushed, so that the particle size distribution cannot be changed,
The distribution amount is adjusted.

The distribution amount is unstable due to variations in the bulk specific gravity of the powder (the distribution weight changes even if the distribution volume is the same)
In such a case, the amount of distribution can be stabilized by sliding the powder distribution amount adjusting cylinder 16.

For example, for powder having a low bulk specific gravity, the powder distribution amount adjusting cylinder 16 is slid upward to increase the gap with the conical cone 14, thereby increasing the distribution volume and maintaining a constant distribution weight. Aim. On the other hand, with respect to powder having a large bulk specific gravity, the powder distribution amount adjusting cylinder 16 is slid downward to reduce the gap with the conical cone 14, thereby reducing the volume of distribution and maintaining a constant distribution weight.

The powder distribution amount adjusting cylinder 16 is divided into a plurality of divided cylinders 1.
With 6A to 16D, the distribution amount (distribution balance) of the powder supplied from the single powder supply pipe 11 to each of the masses 12A to 12D can be adjusted.

For example, when there is a deviation in the bulk specific gravity distribution of the powder in the cross section of the powder supply pipe 11, the divided cylinders 16 A and 16 B on the side of the region where the bulk specific gravity is light are slid upward to make contact with the conical cone 14. Increase the volume of distribution by increasing the gap,
If the divided cylinders 16C and 16D on the side of the region having a large bulk specific gravity are slid downward to reduce the distribution volume by reducing the gap with the conical cone 14, the masses 12A and 12B to which both of them are distributed. And the distribution weights to the masses 12C and 12D can be made equal to each other.

When the bulk specific gravity distribution of the powder in the cross section of the powder supply pipe 11 is uniform, one of the divided cylinders 16A,
16B is slid upward to increase the gap between the cone 12 and the mass 12A, 12B to increase the volume and weight of the distribution to the masses 12A, 12B. By reducing the gap between the two, the volume and weight of distribution to the masses 12C and 12D can be reduced, and as a result, the weight of distribution to each distribution destination can be different from each other.

By vibrating the conical cone 14, the flowability of powder falling around the conical cone 14 can be stabilized, and the distribution of powder can be improved.

(Second Embodiment) (FIGS. 8 and 9) The powder distribution device 20 of the second embodiment shown in FIGS.
The only difference from the powder distribution device 10 of the embodiment is that the powder supplied from the powder supply pipe 11 can be distributed to the two masses 12A and 12B in the distribution chamber 13.
The powder dispensing device 20 is provided with masses 12A, 12B on both sides inside the distribution chamber 13, and the adjacent masses 12A, 12B are provided between the bottom of the conical cone 14 and the entrances of the masses 12A, 12B.
A sharp guide 15 is provided at the boundary between the and the mass 12B. In addition, the powder dispensing device 20 includes a powder dispensing amount adjusting cylinder 16.
Is divided into two divided cylinders 16A and 16B corresponding to the masses 12A and 12B, respectively. A vibrator 17 is connected to the conical cone 14.

Therefore, in the powder distribution device 20, the powder supplied from the powder supply pipe 11 is
Is diverted evenly around the top of the cone, slides down around the conical cone 14, and is evenly distributed to the lower masses 12A, 12B. Then, even in the powder distribution device 20, the above-described operations (1) to (5) are exerted in the powder distribution device 10.

(Third Embodiment) (FIGS. 10 and 11) The powder distribution device 30 of the third embodiment shown in FIGS.
A pre-sorting device 31 is provided at the outlet of the powder supply pipe 11, and each of the two outlets of the pre-sorting device 31 has a distribution chamber 13 (four squares 12) of the powder distribution device 10 of the first embodiment.
A to 12D).

The pre-distribution device 31 distributes the powder supplied from the powder supply tube 11 to two distribution tubes 32A and 32B. The outlet end of the powder supply pipe 11 is connected to the distribution chamber 33, and distribution pipes 32 </ b> A and 32 </ b> B are formed on both sides of the distribution chamber 33.

The pre-sorting device 31 has a conical cone 3 at the outlet of the powder supply pipe 11 in the center of the distribution chamber 33.
4 are arranged. The apex of the conical cone 34 faces the center of the outlet of the powder supply pipe 11, and the distribution pipes 32 </ b> A, 3 </ b> A,
2B correspond to each other. Between the bottom of the conical cone 34 and the inlets of the distribution pipes 32A and 32B, a sharp guide 35 (not shown) having a two-flow triangular cross section is provided at the boundary between the adjacent distribution pipes 32A and 32B. I have. As a result, the powder supplied from the powder supply pipe 11 is evenly distributed around the apex of the conical cone 34, slides down around the conical cone 34, and is further guided by the sharp guide 35 to distribute the powder. It is equally distributed to each of 32A and 32B.

The pre-distributing device 31 is provided between the outlet end of the powder supply pipe 11 and the conical cone 34 to adjust the powder distribution amount adjusting cylinder 3.
6 are provided. The powder distribution amount adjusting cylinder 36 has the same inner diameter as the maximum outer diameter of the conical cone 34, and the powder supply pipe 1
1 slides up and down around the exit end of the
By increasing or decreasing the gap, the amount of powder that slides down around the conical cone 34 can be adjusted. Amount (weight) of distribution from powder supply pipe 11 to distribution pipes 32A and 32B
Changes due to fluctuations in the bulk density of the powder, fluctuations in the fluidity, etc., so that the powder having the desired weight can be distributed to the distribution pipes 32A and 32B by sliding the powder distribution amount adjusting cylinder 36 described above. . The sliding of the powder distribution amount adjusting cylinder 36 may be performed manually or automatically. As means for automatically sliding the powder distribution amount adjusting cylinder 36, a multi-stage cylinder, a stepping motor, a servomotor, or the like can be employed.

The pre-distribution device 31 transfers the powder distribution amount adjusting cylinder 36 to two divided cylinders 36A and 36B corresponding to the distribution pipes 32A and 32B, which are distribution destinations around the bottom of the conical cone 34, respectively. Divided. The divided cylinders 36A and 36B can be independently slid up and down around the outlet end of the powder supply pipe 11. Thereby, each distribution pipe 32 of the powder supplied from the single powder supply pipe 11 can be used.
A and 32B (distribution balance) can be adjusted. The sliding of the divided cylinders 36A and 36B may be performed manually or automatically. As means for automatically sliding the divided cylinders 36A and 36B, a multi-stage cylinder, a stepping motor, a servomotor, or the like can be used.

The pre-sorting device 31 has a vibrator 37 connected to a conical cone 34. The vibrator 37 causes the conical cone 34 to slightly vibrate when necessary, and stabilizes the powder sliding property around the conical cone 34.

However, in the powder distribution device 30, the outlet of one of the distribution tubes 32A of the pre-distribution device 31 is connected to one of the distribution chambers 13 of the powder distribution device 10 described above.
And the other one of the distribution chambers 13 of the powder distribution device 10 described above is connected to the outlet end of the other distribution tube 32B. Each distribution chamber 13 has masses 12A to 12D, a conical cone 14, a sharp guide 15, a powder distribution amount adjusting cylinder 16, split cylinders 16A to 16D, and a vibrator 17, as in the first embodiment.

Accordingly, the operation of the powder distribution device 30 is as follows. (1) The powder supplied from the powder supply pipe 11 is uniformly distributed around the apex of the conical cone 34 in the pre-sorting device 31 and slides down around the conical cone 34,
It is equally distributed to each of the lower distribution pipes 32A and 32B.

(2) The powder supplied from each of the distribution tubes 32A and 32B is
The flow is evenly distributed around the apex of the conical cone 14 and slides down around the conical cone 14, so that each lower mass 12
A to 12D are evenly distributed.

The powder distributing device 30 also has the above-mentioned operations (1) to (4) in the powder distributing device 10.

Fourth Embodiment (FIG. 12) The difference between the powder distribution device 40 of the fourth embodiment and the powder distribution device 30 of the third embodiment shown in FIG.
The only difference is that the powder chamber 13 (having two masses 12A and 12B) of the powder distribution device 20 of the second embodiment is connected to each of the two distribution pipes 32A and 32B.

Accordingly, the operation of the powder distribution device 40 is as follows. (1) The powder supplied from the powder supply pipe 11 is uniformly distributed around the apex of the conical cone 34 in the pre-sorting device 31 and slides down around the conical cone 34,
It is equally distributed to each of the lower distribution pipes 32A and 32B.

(2) The powder supplied from each of the distribution tubes 32A and 32B is
The flow is evenly distributed around the apex of the conical cone 14 and slides down around the conical cone 14, so that each lower mass 12
A and 12B are evenly distributed.

The powder distributing apparatus 40 also has the above-mentioned operations (1) to (4) in the powder distributing apparatus 10.

(Fifth Embodiment) (FIG. 13) The powder distribution device 50 of the fifth embodiment shown in FIG. 13 is different from the powder distribution device 10 of the first embodiment in that
0, the cylinder 16 for adjusting the powder distribution amount is removed, and the cone-shaped cone 14 is removed.
The distance between the outlet end of the powder supply pipe 11 and the conical cone 14 is changed by the up and down movement of the powder supply pipe 11, and the amount of powder that slides down around the conical cone 14 and passes therethrough can be adjusted.

The up and down movement of the conical cone 14 can be performed by an elevating device 51 including a multi-stage cylinder, a stepping motor, a servomotor, and the like. The conical cone 14 may be moved up and down manually.

(Sixth Embodiment) (FIG. 14) The powder dispensing device 60 of the sixth embodiment shown in FIG.
A bellows 61 is provided between the outer peripheral portion of the cylinder and the upper end of the powder distribution amount adjusting cylinder 16 so as to prevent powder leakage from the gap between the powder supply pipe 11 and the powder distribution amount adjusting cylinder 16. I did it.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design may be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, the distribution destination by the powder distribution device of the present invention is not limited to a mass, but may be a chute or the like. Further, the conical cone is not limited to a conical shape, and may be a pyramid shape. In addition, the load on the powder can be further reduced by adopting a cone having a slope of the cone surface that is sufficiently larger than the angle of repose of the powder.

[0053]

As described above, according to the present invention, the powder can be distributed without changing the particle size distribution of the powder.

Further, according to the present invention, the distribution amount of the powder can be adjusted without changing the particle size distribution of the powder.

[Brief description of the drawings]

FIG. 1 is a basic diagram of the present invention.

FIG. 2 is a longitudinal sectional view showing the first embodiment.

FIG. 3 is a perspective view showing the first embodiment.

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.

FIG. 5 is a schematic diagram showing a fully opened state of a powder distribution amount adjusting cylinder.

FIG. 6 is a schematic diagram showing a fully closed state of the powder distribution amount adjusting cylinder.

FIG. 7 is a schematic diagram showing an independent adjustment state of a divided cylinder of the powder distribution amount adjustment cylinder.

FIG. 8 is a perspective view showing a second embodiment.

FIG. 9 is a transverse sectional view taken along line IX-IX in FIG.

FIG. 10 is a longitudinal sectional view showing a third embodiment.

FIG. 11 is a transverse sectional view taken along the line XX of FIG. 10;

FIG. 12 is a cross-sectional view showing a fourth embodiment.

FIG. 13 is a longitudinal sectional view showing a fifth embodiment.

FIG. 14 is a longitudinal sectional view showing a sixth embodiment.

[Explanation of symbols]

 10, 20, 30, 40, 50, 60 Powder distribution device 11 Powder supply pipe 12A to 12D Mass (distribution destination) 14 Conical cone 16 Powder distribution amount adjusting cylinder 16A to 16D Division cylinder 17 Vibrator

Claims (5)

[Claims] 1. A powder distribution device for distributing powder supplied from a powder supply pipe to a plurality of distribution destinations below, wherein a cone having a cone shape is disposed at an outlet of the powder supply tube. A powder dispensing apparatus characterized in that the apex faces the center of the outlet of the powder supply pipe, and distribution destinations are arranged at circumferentially equally divided positions around the bottom of the conical cone. 2. The powder distribution device according to claim 1, wherein the powder distribution amount can be adjusted by changing the distance between the outlet end of the powder supply pipe and the conical cone. 3. A powder distribution amount adjusting cylinder is provided between the outlet end of the powder supply pipe and the cone, and the powder distribution amount adjusting cylinder moves up and down around the outlet end of the powder supply pipe. The powder dispensing device according to claim 1 or 2, wherein the amount of powder passing around the cone is adjusted by increasing or decreasing the distance between the cone and the cone. 4. The powder distribution amount adjusting cylinder is divided into the same number as a plurality of distribution destinations at the lower part of the bottom of the conical cone, and each divided cylinder can independently slide up and down around the outlet end of the powder supply pipe. 4. The powder distribution device according to claim 3, wherein: 5. The powder distributing apparatus according to claim 1, wherein said conical cone is capable of vibrating.