Powder feeding device

Abstract

Prevents impurities from being mixed in when supplying powder. [Solution] The powder supplying device 10 includes a storage container 20 that stores powder and has a discharge port OP22 downwardly from which the powder PD can be discharged, a conveying means for conveying the powder PD, and a discharging means for discharging the powder conveyed by the conveying means. The conveying means is disposed below the storage container 20 so as to partially overlap the discharge port OP22 of the storage container 20 in a plan view, and has a plurality of through holes TH31 each large enough to accommodate powder. The conveying means has a moving mechanism for moving the positions of the plurality of through holes TH31 in a predetermined direction. The discharging means has a discharge hole TH41 disposed below the conveying means at a position that overlaps the conveying means but does not overlap the discharge port OP22 of the storage container 20 in a plan view. The discharging means has an airflow generating means for generating an airflow from some of the plurality of through holes TH31 toward the discharge hole TH41 in a region where some of the plurality of through holes TH31 and the discharge hole TH41 overlap.

Description

[Technical Field]

[0001] The present invention relates to powder supplying technology. [Background technology]

[0002] The granular quantitative feeder device described in Patent Document 1 includes a granular material storage container, a supply means, a supply plate, a forced discharge plate, and a discharge chute.

[0003] The supply plate is a gear-shaped disk. Granules are supplied to the supply plate from the container through a supply means. The supply plate rotates to transport the granules contained between its teeth.

[0004] The forced discharge plate is a gear-shaped disk that meshes with the supply plate. The granular material conveyed by the supply plate is scraped out from between the teeth of the supply plate by the teeth of the forced discharge plate at the position where the supply plate and the forced discharge plate mesh.

[0005] The discharge chute is located below the position where the supply platen and the forced discharge platen mesh together. The scraped particles are discharged downward through the discharge chute. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7026966 specification Summary of the Invention [Problem to be solved by the invention]

[0007] However, in conventional configurations such as that of Patent Document 1, the supply plate and the forced discharge plate are interlocked, making physical contact between the supply plate and the forced discharge plate unavoidable, and this physical contact may result in impurities such as metal scraps being mixed into the particle mass.

[0008] Therefore, an object of the present invention is to suppress the inclusion of impurities in the supply of powder. [Means for solving the problem]

[0009] A powder supplying device according to one embodiment of the present invention includes a storage container that stores powder and has an outlet downwardly through which the powder can be discharged, a conveying means for conveying the powder, and an outlet means for discharging the powder conveyed by the conveying means. The conveying means is disposed below the storage container so as to partially overlap the outlet of the storage container in a plan view, and has a plurality of through holes each large enough to accommodate powder. The conveying means has a moving mechanism for moving the positions of the plurality of through holes in a predetermined direction. The outlet means has outlets disposed below the conveying means in a position that overlaps the conveying means but does not overlap the outlet of the storage container in a plan view. The outlet means has an airflow generating means for generating an airflow from some of the plurality of through holes toward the outlet in a region where some of the plurality of through holes overlap with the outlet.

[0010] In this configuration, when the powder is discharged from the conveying means through the discharging means, physical contact such as scraping is not performed, thereby suppressing the generation of impurities due to physical contact. [Effects of the Invention]

[0011] According to this invention, it is possible to suppress the inclusion of impurities in the powder supply. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is an external perspective view showing the configuration of a powder supplying device according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the configuration of the powder supplying device according to the first embodiment. [Figure 3] FIG. 3 is a top view showing the configuration of the powder supplying device according to the first embodiment. [Figure 4] FIG. 4 is a side cross-sectional view showing the configuration of the powder supplying device according to the first embodiment. [Figure 5] FIG. 5 is a top view showing an example of the state of powder transportation. [Figure 6] FIG. 6 is a diagram showing a concept for making constant the area where a plurality of through-holes overlap with the discharge hole for a predetermined period of time. [Figure 7] FIG. 7 is a plan view showing an example of a conveying board according to the second embodiment. [Figure 8] FIG. 8 is a side cross-sectional view showing the configuration of a powder supplying device according to the third embodiment. [Figure 9] FIG. 9(A) is a side cross-sectional view showing the configuration of a powder supplying device according to the fourth embodiment, and FIG. 9(B) is a plan view showing an excerpt of the powder transport area of ​​the powder supplying device according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] [First embodiment] A powder supplying device according to a first embodiment of the present invention will be described with reference to the drawings.

[0014] Fig. 1 is an external perspective view showing the configuration of a powder supplying device according to a first embodiment. Fig. 2 is an exploded perspective view showing the configuration of a powder supplying device according to the first embodiment. Fig. 3 is a top view showing the configuration of a powder supplying device according to the first embodiment. Fig. 4 is a side cross-sectional view showing the configuration of a powder supplying device according to the first embodiment.

[0015] In the present invention, "up" and "down" do not necessarily indicate a strict vertical relationship, but may also indicate a relationship with a certain degree of inclination relative to the vertical. Similarly, a planar view in the present invention is not limited to viewing a plane (horizontal plane) completely perpendicular to the vertical direction, but may also be viewed with a predetermined inclination depending on the inclination of the up-down direction relative to the vertical direction.

[0016] As shown in FIGS. 1, 2, 3, and 4, the apparatus includes a container 20, a conveying board 30, a frame 39, a discharge board 41, a nozzle 42, and an auxiliary board 50.

[0017] The storage container 20 has a substantially cylindrical shape. The storage container 20 is disposed with one end in the direction in which the axis of the cylindrical shape extends as the upper end and the other end as the lower end. The storage container 20 has a supply port OP21 for the powder PD and is provided with a discharge port OP22 for the powder PD at a portion of the lower end. Note that in FIG. 1, the supply port OP21 is formed by opening the entire upper end of the storage container 20, but is not limited to this. For example, the supply port OP21 may be formed by opening a portion of the upper end of the storage container 20, or by opening a portion of the side surface near the upper end.

[0018] As described above, the storage container 20 has a substantially cylindrical shape with a constant diameter from the upper end to the vicinity of the discharge port OP22. The diameter of the discharge port OP22 is smaller than the diameter of the main part of the cylindrical shape of the storage container 20. That is, the storage container 20 has an inclined wall whose opening shape gradually becomes smaller toward the discharge port OP22. With this configuration, the powder PD stored in the storage container 20 slides down along the wall surface of the inclined wall to the discharge port OP22. This allows the storage container 20 to reliably allow the powder PD to reach the discharge port OP22.

[0019] Stirring means 29 is disposed inside the storage container 20. The stirring means 29 has, for example, a configuration in which a plurality of blades are radially arranged when viewed from above (plan view). The plurality of blades are rotatably arranged when viewed from above. The rotation of the plurality of blades stirs the powder PD contained in the storage container 20. This allows the storage container 20 to suppress aggregation of the powder PD contained therein.

[0020] The conveying plate 30 is a circular plate and has an upper surface 301 and a lower surface 302. The upper surface 301 and the lower surface 302 are flat surfaces.

[0021] A plurality of through holes TH31 and drive holes TH32 are formed in the conveying board 30. The plurality of through holes TH31 penetrate the conveying board 30 in the thickness direction and open to the upper surface 301 and the lower surface 302. The drive hole TH32 has a shape that opens to at least the lower surface 302, and in this embodiment, it opens to the upper surface 301 and the lower surface 302. The conveying board 30 corresponds to the "main board" of the present invention.

[0022] The plurality of through holes TH31 are large enough to accommodate the powder PD. The plurality of through holes TH31 are formed in a predetermined pattern. The concept of the formation pattern of the plurality of through holes TH31 will be described later.

[0023] The drive hole TH32 is formed at the center when viewed from above of the transfer board 30. The drive hole TH32 has a shape in which the shaft SH that rotates the transfer board 30 is fitted.

[0024] The frame 39 is a flat plate and has an upper surface 391 and a lower surface 392. The frame 39 has an opening in which the transfer board 30 is housed.

[0025] The conveying platen 30 is rotatably disposed within the opening of the frame body 39. For example, an upper surface 301 of the conveying platen 30 and an upper surface 391 of the frame body 39 are flush with each other, and a lower surface 302 of the conveying platen 30 and a lower surface 392 of the frame body 39 are flush with each other.

[0026] The discharge plate 41 is a flat plate. The discharge plate 41 has an upper surface 411 and a lower surface 412. The upper surface 411 and the lower surface 412 are flat surfaces, but it is sufficient that at least the upper surface 411 is flat.

[0027] The discharge plate 41 has a discharge hole TH41 and a shaft through-hole TH42. The discharge hole TH41 and the shaft through-hole TH42 penetrate the discharge plate 41 in the thickness direction and open to the upper surface 411 and the lower surface 412.

[0028] The discharge hole TH41 has a shape that includes a predetermined area of ​​the plurality of through holes TH31 when viewed from above.

[0029] The shaft through-hole TH42 has a shape that allows the shaft SH to be inserted therethrough.

[0030] The auxiliary platen 50 is a flat plate. The auxiliary platen 50 has an upper surface 501 and a lower surface 502. The upper surface 501 and the lower surface 502 are flat surfaces, but it is sufficient that at least the lower surface 502 is flat. The auxiliary platen 50 corresponds to the "auxiliary member" of the present invention.

[0031] The auxiliary board 50 has a through hole TH51 and a through hole TH52. The through hole TH51 and the through hole TH52 penetrate the auxiliary board 50 in the thickness direction and open to the upper surface 501 and the lower surface 502.

[0032] The through-hole TH51 has the same shape as the supply port OP21 of the storage container 20 when viewed from above. The through-hole TH52 has the same shape as the discharge hole TH41 of the discharge panel 41 when viewed from above.

[0033] The flat plate member consisting of the transport board 30 and the frame body 39, the discharge board 41, and the auxiliary board 50 are stacked in the vertical direction.

[0034] More specifically, auxiliary platen 50 is disposed on the side of upper surfaces 301, 391 of the flat plate member consisting of conveying platen 30 and frame body 39. Lower surface 502 of auxiliary platen 50 abuts against upper surface 301 of conveying platen 30 and upper surface 391 of frame body 39, or faces them with a predetermined clearance (small gap).

[0035] The through hole TH51 is arranged at a position overlapping with a part of the conveying board 30 in a top view. More specifically, the through hole TH51 is arranged at a position overlapping with a part of the plurality of through holes TH31 formed in the conveying board 30.

[0036] The through hole TH52 is disposed at a position overlapping the conveying board 30 in a top view. More specifically, the through hole TH52 overlaps the conveying board 30 in an area opposite to the area of ​​the conveying board 30 where the through hole TH51 overlaps, with respect to the center position of the conveying board 30 (the position where the drive hole TH32 is formed).

[0037] The discharge platen 41 is disposed on the side of the lower surfaces 302, 392 of the flat plate member consisting of the transport platen 30 and the frame body 39. The upper surface 411 of the discharge platen 41 abuts against the lower surface 302 of the transport platen 30 and the lower surface 392 of the frame body 39.

[0038] The discharge hole TH41 overlaps with the conveying board 30 in a top view. More specifically, the discharge hole TH41 is disposed at a position overlapping with the through hole TH52 of the auxiliary board 50 via the conveying board 30 in a top view. Note that the discharge hole TH41 only needs to be disposed at a position not overlapping with at least the through hole TH51 (a position not overlapping with the storage container 20).

[0039] The shaft through-hole TH42 is disposed at a position overlapping the drive hole TH32 of the transfer board 30 in a top view.

[0040] The storage container 20 is placed on the upper surface 501 side of the auxiliary board 50. The storage container 20 is attached to the auxiliary board 50 so that the discharge outlet OP22 and the through-hole TH51 are in communication with each other. As a result, the discharge outlet OP22 of the storage container 20 overlaps with some of the through-holes TH31 of the conveying board 30 in a top view.

[0041] The nozzle 42 is tubular and is disposed on the upper surface 501 side of the auxiliary platen 50. The nozzle 42 is attached to the auxiliary platen 50 so that the hollow portion of the nozzle 42 communicates with the through-hole TH52.

[0042] A discharge pipe DT is attached to the discharge hole TH41.

[0043] With this configuration, the powder supplying device 10 supplies powder as follows: Figure 5 is a top view showing an example of the state of powder transport. In Figure 5, the auxiliary platen 50 is omitted.

[0044] The powder PD contained in the container 20 drops from the discharge port OP22 and is contained in the plurality of through-holes TH31 overlapping with the discharge port OP22.

[0045] The powder is, for example, a low activity powder containing a metal.

[0046] The conveying board 30 rotates in a top view by rotation of the shaft SH, which is a rotation mechanism. As a result, the plurality of through holes TH31 move sequentially below the discharge opening OP22. Then, the plurality of through holes TH31 that have moved below the discharge opening OP22 are sequentially filled with the powder PD.

[0047] When the conveying board 30 rotates and the plurality of through holes TH31 containing the powder PD reach a position where they overlap with the discharge holes TH41 and the through holes TH52, the powder PD falls into the discharge holes TH41. At this time, gas is supplied from the nozzle 42 to the through holes TH52. The gas that has flowed into the through holes TH52 is discharged into the discharge holes TH41 through the plurality of through holes TH31 that overlap with the through holes TH52. The discharged gas discharges the powder PD contained in the plurality of through holes TH31 into the discharge holes Th41.

[0048] In this way, the powder supplying device 10 can discharge (supply) the powder PD contained in the container 20 to the discharge hole TH41 without using physical contact such as gears as in the conventional configuration. This allows the powder supplying device 10 to suppress the generation of impurities due to physical contact and suppress the mixing of impurities when supplying the powder PD.

[0049] Furthermore, since no physical contact occurs, the powder supplying device 10 can suppress localized, instantaneous heating and temperature rise due to physical contact, and can suppress excessive reactions to the powder PD.

[0050] Furthermore, the powder supplying device 10 keeps constant the area over which the multiple through holes TH31 overlap with the discharge hole TH41 at a given time. In other words, the powder supplying device 10 keeps constant the area over which the multiple through holes TH31 pass above the discharge hole TH41 per unit time. Note that the term "constant area" here does not necessarily mean strictly constant, but also includes a state in which at least one of the multiple through holes TH31 always overlaps with the discharge hole TH41.

[0051] Specifically, the plurality of through holes TH31 are formed based on the following concept: Fig. 6 is a diagram showing a concept for making constant the area where the plurality of through holes overlap with the discharge hole for a predetermined period of time.

[0052] A circular transport zone ZN31 is set for the transport board 30. The center of the transport zone ZN31 coincides with the center of the transport board 30. The inner peripheral edge of the transport zone ZN31 coincides with the end of the discharge hole TH41 on the center side of the transport board 30. The outer peripheral edge of the transport zone ZN31 coincides with the end of the discharge hole TH41 on the outer peripheral side of the transport board 30. When the transport board 30 is rotated at a constant speed, a plurality of through holes TH31 are formed in the transport zone ZN31, and the plurality of through holes TH31 are arranged so that the area of ​​overlap between the plurality of through holes TH31 and the discharge hole TH41 is steadily approximately the same.

[0053] In this way, by arranging a plurality of through holes TH31, the powder supplying device 10 can discharge (supply) a constant amount of powder PD stably from the discharge holes TH41. In other words, the powder supplying device 10 can suppress pulsation in the supply amount of powder PD, and can supply a constant amount of powder PD over both a long time span and a short time span.

[0054] Furthermore, the auxiliary platen 50 abuts against the upper surface 301 of the conveying platen 30 or faces it with a predetermined clearance. This makes it possible to more reliably keep the amount of powder PD contained in each of the plurality of through-holes TH31 constant. Therefore, the powder supplying device 10 can more stably supply a constant amount of powder PD.

[0055] It is preferable that the gas supplied (discharged) from the nozzle 42 is an inert gas, which can prevent undesired reactions between the powder PD and the gas.

[0056] Moreover, the auxiliary platen 50 can be omitted, and even if it is omitted, the powder supplying device 10 can at least suppress the mixing of impurities when supplying the powder PD.

[0057] Such a powder supplying device 10 can be used, for example, to supply powder for forming terminal electrodes of electronic components used in the AD method. By employing the powder supplying device 10, it is possible to suppress the incorporation of impurities into the device performing the AD method and stably supply a constant amount of powder. This allows the formation of terminal electrodes of electronic components with consistent quality.

[0058] In the above-described configuration, gas is discharged from above the conveying board 30. However, it is also possible to use a suction pump or a vacuum line provided as a utility in a factory to suck gas from below the conveying board 30 and discharge the powder.

[0059] As described above, the configuration for generating airflow from some of the through-holes TH31 toward the discharge hole TH41 corresponds to the "airflow generating means" of the present invention. In addition, the suction pump and the vacuum line reduce the pressure below the conveyor board 30 relative to the pressure above, and therefore correspond to the "reduced pressure source" of the present invention.

[0060] [Second embodiment] A powder supplying device according to a second embodiment of the present invention will be described with reference to the drawings. Fig. 7 is a plan view showing an example of a conveying board according to the second embodiment.

[0061] 7, the powder supplying device according to the second embodiment differs from the powder supplying device 10 according to the first embodiment in the configuration of the conveying board 30A. Other configurations of the powder supplying device according to the second embodiment are the same as those of the powder supplying device 10, and a description of similar parts will be omitted.

[0062] The conveying board 30A is a mesh-like circular plate in which a plurality of beams are combined so as to intersect at a predetermined angle. The plurality of through-holes TH31 are holes formed in the mesh.

[0063] With this configuration, the powder supplying device according to the second embodiment can achieve the same effects as the powder supplying device 10 according to the first embodiment. Furthermore, the powder supplying device according to the second embodiment can more easily achieve a structure in which the areas of the plurality of through-holes TH31 that pass above the discharge hole TH41 per unit time are constant.

[0064] [Third embodiment] A powder supplying device according to a third embodiment of the present invention will be described with reference to the drawings. Figure 8 is a side cross-sectional view showing the configuration of the powder supplying device according to the third embodiment.

[0065] 8, the powder supplying device 10C according to the third embodiment differs from the powder supplying device 10 according to the first embodiment in that it includes a magnet 60. Other configurations of the powder supplying device 10C are the same as those of the powder supplying device 10, and therefore a description of similar parts will be omitted.

[0066] The powder PD is a paramagnetic material.

[0067] The powder supplying device 10C includes a magnet 60. The magnet 60 is disposed at a position on the discharge platen 41 where the transport platen 30 and the through-hole TH51 of the auxiliary platen 50 overlap with each other.

[0068] As a result, the powder PD is attracted by the magnet 60 and stored in the plurality of through-holes TH31 from the storage container 20. Therefore, the powder supplying device 10C can more reliably supply and store the powder PD in the plurality of through-holes TH31 from the storage container 20, thereby achieving a more stable supply of the powder PD. In this way, the magnet 60 functions as a storage assisting means that uses the physical properties of the powder PD to assist in storing the powder PD in the plurality of through-holes TH31 in the present invention.

[0069] Although not shown, it is preferable that the powder supplying device 10C is provided with a demagnetizing means between the positions where the plurality of through holes TH31 overlap with the through holes TH51 and the positions where they overlap with the discharge holes TH41. This allows the powder supplying device 10C to more reliably discharge the powder PD from the plurality of through holes TH31 to the discharge holes TH41.

[0070] The position of the magnet 60 is not limited to that shown in FIG. 8, and may be any position that can apply magnetic force when the powder PD is accommodated from the accommodation container 20 into the plurality of through-holes TH31.

[0071] [Fourth embodiment] A powder supplying device according to a fourth embodiment of the present invention will be described with reference to the drawings. Fig. 9(A) is a side cross-sectional view showing the configuration of the powder supplying device according to the fourth embodiment, and Fig. 9(B) is a plan view of the powder transport area of ​​the powder supplying device according to the fourth embodiment.

[0072] 9(A) and 9(B), a powder supplying device 10D according to the fourth embodiment differs from the powder supplying device 10 according to the first embodiment in the configurations of a conveying board 30D and a discharging board 41D. The other configurations of the powder supplying device 10D are the same as those of the powder supplying device 10, and a description of the same parts will be omitted.

[0073] The conveying board 30D is strip-shaped and tubular. The conveying board 30D has a plurality of through-holes TH31D at predetermined intervals along its length (see FIG. 9(B)). The conveying board 30D, which is tubular in side view, moves (rotates) sequentially along its length by conveyor rollers 38.

[0074] The discharge plate 41D is arranged so as to overlap a portion of the length of the carry plate 30D. The width of the discharge plate 41D is equal to or greater than the width of the carry plate 30D. The discharge plate 41D overlaps the entire width of the carry plate 30D. Note that it is sufficient that the discharge plate 41D is arranged so as to overlap at least a plurality of through holes TH31D of the carry plate 30D.

[0075] The discharge panel 41D includes a discharge hole TH41D. The discharge hole TH41D is a generally rectangular shape that is elongated in the width direction when viewed from above (plan view). Both ends of the discharge hole TH41D in the width direction are positioned outward of both ends of the through holes TH31D in the width direction. As a result, when the through holes TH31D pass above the discharge hole TH41D, both ends of the through holes TH31D in the width direction overlap the discharge hole TH41D.

[0076] The storage container 20 is disposed above the conveying board 30D. The storage container 20 is disposed upstream of the discharge hole TH41D in the conveying area of ​​the powder PD, and is disposed at a position overlapping with the discharge board 41D in a top view.

[0077] In this configuration, when the transfer board 30D rotates, the powder PD is received from the storage container 20 into the plurality of through holes TH31D, and the powder PD is discharged from the discharge holes TH41D.

[0078] This allows the powder supplying device 10D to suppress the generation of impurities due to physical contact, and to suppress the mixing of impurities when supplying the powder PD.

[0079] Furthermore, in the powder supplying device 10D, the plurality of through holes TH31D are also arranged so that the area of ​​the plurality of through holes TH31D passing above the discharge hole TH41D per unit time is constant.

[0080] Specifically, the through holes TH31D are quadrilaterals (for example, parallelograms when viewed from above) that are not parallel to and not perpendicular to the length and width directions of the conveying board 30D. In this case, the through holes TH31D are formed in a shape such that the length across which the through holes TH31D cross an imaginary line (the two-dot chain line in FIG. 9(B)) that is parallel to the width direction is always constant.

[0081] This allows the powder supplying device 10D to stably discharge (supply) a constant amount of powder PD from the discharge holes TH41D.

[0082] The powder supplying device of the present application is not limited to supplying powder for the AD method for forming terminal electrodes of electronic components as shown in the first embodiment, but can also be applied to supplying powder in the following situations.

[0083] A. Powder coating in paint ejection (printing) B. Snow-melting agent spraying C. Chemical industry: Specifically, for example, heat-generating chemical reactions that require constant reaction in a tank that requires temperature control. D. Cement and building materials industry E. 3D (three-dimensional) printing technology F. Waste treatment facilities The present specification discloses the following:

[0084] <1> a container in which powder is stored and which has a discharge port at the bottom through which the powder can be discharged; a conveying means for conveying the powder; Discharge means for discharging the powder transported by the transport means; Equipped with The conveying means is a powder supply nozzle disposed below the storage container so as to partially overlap the discharge outlet of the storage container in a plan view, and having a plurality of through holes each large enough to accommodate the powder; a moving mechanism that moves the positions of the plurality of through holes in a predetermined direction; The discharge means is a discharge hole disposed below the conveying means at a position overlapping the conveying means but not overlapping the discharge opening of the storage container in the plan view; an airflow generating means for generating an airflow from a portion of the plurality of through holes toward the discharge hole in a region where a portion of the plurality of through holes overlaps with the discharge hole; Powder feeding device.

[0085] <2> The conveying means is a main plate having the plurality of through holes; an auxiliary member disposed above the main plate at a predetermined interval and having a flat lower surface on the main plate side; Equipped with <1> The powder supplying device according to claim 1.

[0086] <3> After the powder is accommodated in the through holes, the moving mechanism moves some of the through holes so that at least one of the through holes always overlaps with the discharge hole. <1> or <2> The powder supplying device according to claim 1.

[0087] <4> The airflow generating means is a nozzle disposed above the conveying means and configured to discharge gas downward in a region where the through hole and the discharge hole overlap so as to generate an airflow from the through hole toward the discharge hole; <1> ~ <3> 10. The powder supplying device according to claim 9, wherein

[0088] <5> The airflow generating means is a pressure reduction source disposed below the conveying means and configured to discharge gas from the discharge hole so as to generate an airflow from the through hole toward the discharge hole; <1> ~ <4> 10. The powder supplying device according to claim 9, wherein

[0089] <6> A stirring means for stirring the powder contained in the container is provided. <1> ~ <5> 10. The powder supplying device according to claim 9, wherein

[0090] <7> The container has an inclined wall at the powder discharge portion, the opening of which becomes gradually smaller toward the discharge port. <1> ~ <6> 10. The powder supplying device according to claim 9, wherein

[0091] <8> a containing assisting means for assisting the containing of the powder in the plurality of through holes by utilizing physical properties of the powder; <1> ~ <7> 10. The powder supplying device according to claim 9, wherein

[0092] <9> the conveying means comprises a flat plate; The plurality of through holes are holes that penetrate the flat plate in a thickness direction. <1> ~ <8> 10. The powder supplying device according to claim 9, wherein

[0093] <10> the conveying means is a mesh plate, The plurality of through holes are holes formed by the mesh. <1> ~ <8> 10. The powder supplying device according to claim 9, wherein

[0094] <11> The conveying means is a circular plate having the plurality of through holes formed therein; a rotation mechanism that rotates the disk; Equipped with <1> ~ <10> 10. The powder supplying device according to claim 9, wherein

[0095] <12> The powder is a low activity powder containing a metal. <1> ~ <11> 10. The powder supplying device according to claim 9, wherein [Explanation of symbols]

[0096] 10, 10C, 10D: Powder feeding device 20: Containment container 29: Stirring means 30, 30A, 30D: Conveyor board 39: Frame 41, 41D: Ejection board 42: Nozzle 50: Auxiliary board 60: Magnet OP21: Supply port OP22: Outlet TH31, TH31D: Through hole TH32: Drive hole TH41, TH41D: Discharge hole TH42: Shaft through hole TH51: Through hole TH52:Through hole PD: Powder

Claims

1. a container in which powder is stored and which has a discharge port at the bottom through which the powder can be discharged; a conveying means for conveying the powder; Discharge means for discharging the powder transported by the transport means; Equipped with The conveying means is a powder discharging nozzle disposed below the storage container so as to partially overlap the discharge outlet of the storage container in a plan view, the powder discharging nozzle having a plurality of through holes each large enough to accommodate the powder; a moving mechanism that moves the positions of the plurality of through holes in a predetermined direction; The discharge means is a discharge hole disposed below the conveying means at a position overlapping the conveying means but not overlapping the discharge opening of the storage container in the plan view; an airflow generating means for generating an airflow from a portion of the plurality of through holes toward the discharge hole in a region where a portion of the plurality of through holes overlaps with the discharge hole; Powder feeding device.

2. The conveying means is a main plate having the plurality of through holes; an auxiliary member disposed above the main plate at a predetermined interval and having a flat lower surface on the main plate side; Equipped with The powder supplying device according to claim 1 .

3. After the powder is accommodated in the through holes, the moving mechanism moves some of the through holes so that at least one of the through holes always overlaps with the discharge hole. The powder supplying device according to claim 1 .

4. The airflow generating means is a nozzle disposed above the conveying means and configured to discharge gas downward in a region where the through hole and the discharge hole overlap so as to generate an airflow from the through hole toward the discharge hole; The powder supplying device according to claim 1 .

5. The airflow generating means is a pressure reduction source disposed below the conveying means and configured to discharge gas from the discharge hole so as to generate an airflow from the through hole toward the discharge hole; The powder supplying device according to claim 1 .

6. A stirring means for stirring the powder contained in the container is provided. The powder supplying device according to claim 1 .

7. The container has an inclined wall at the powder discharge portion, the opening of which becomes gradually smaller toward the discharge port. The powder supplying device according to claim 1 .

8. a containing assisting means for assisting the containing of the powder in the plurality of through holes by utilizing physical properties of the powder; The powder supplying device according to claim 1 .

9. the conveying means comprises a flat plate; The plurality of through holes are holes that penetrate the flat plate in a thickness direction. The powder supplying device according to claim 1 .

10. the conveying means is a mesh plate, The plurality of through holes are holes formed by the mesh. The powder supplying device according to claim 1 .

11. The conveying means is a circular plate having the plurality of through holes formed therein; a rotation mechanism that rotates the disk; Equipped with The powder supplying device according to claim 1 .

12. The powder is a low activity powder containing a metal. The powder supplying device according to claim 1 .

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