JP2013063850A - Powder feeder - Google Patents

Abstract

A powder supply apparatus capable of improving the quantitativeness of a powder raw material to be conveyed is provided.
In a powder supply apparatus, a first zone into which a powder raw material is introduced and a powder raw material conveyed from the first zone are compressed, and a powder raw material is discharged from a discharge port. A cylindrical barrel having two zones, and rotationally driven in the barrel to convey the powder raw material in the axial direction of the barrel from the first zone to the second zone, and in the second zone Powder that includes a screw that compresses and a plurality of dispersion members that are fixed to the barrel along the circumferential direction so as to protrude from the inner surface of the barrel toward the inner space in the second zone, and that is conveyed in the axial direction of the barrel Resistance is given to the raw material by a plurality of dispersing members to enhance the compressive action of the powder raw material, and the compressed powder raw material is brought into contact with the plurality of dispersing members to disperse the powder raw material.
[Selection] Figure 1

Description

  The present invention relates to a powder supply device that conveys and supplies a powder raw material along the axial direction of a barrel by rotationally driving a screw disposed in the barrel.

  Conventionally, various types of powder supply devices of this type are known. For example, in a conventional powder supply device, a screw material arranged in a barrel is driven to rotate, so that the powder raw material introduced into the barrel at the introduction portion is conveyed to the discharge portion along the barrel axis direction. Then, it has a configuration that is supplied to the outside of the barrel at the discharge portion (see, for example, Patent Document 1). The space between the introduction part and the discharge part in the barrel is a compression part. In this compression part, the flight distance of the screw is narrowed compared to other parts, so that the powder raw material to be conveyed is consolidated. Processing is performed.

  At the barrel end portion in the discharge portion, a plurality of dispersion blades are provided that protrude in the radial direction from the peripheral surface of the screw shaft. When the powder raw material compacted and quantified in the compression unit comes into contact with the dispersion blade that is rotationally driven together with the screw shaft, the powder raw material is dispersed and discharged from the end portion of the barrel.

Japanese Patent No. 3386326

  In recent years, the objects of powder raw materials handled by such powder supply apparatuses have been diversified, and there are cases in which powder raw materials having a high aggregating action are handled depending on characteristics and particle diameters. On the other hand, in powder supply apparatuses, it is required to supply powder raw materials while ensuring quantitativeness and uniformity with respect to powder raw materials having various characteristics.

  However, in the powder supply apparatus of Patent Document 1, a plurality of dispersion blades fixed to the peripheral surface of the screw shaft are rotated together with the screw shaft and brought into contact with the compacted powder material, whereby the powder material A configuration that disperses these is employed. In such a configuration, since the dispersion blade is rotated together with the screw shaft, a sufficient dispersion effect cannot be given to the powder raw material to be conveyed. Therefore, there is a problem that it is difficult to ensure the quantitativeness and uniformity of the powder raw material to be conveyed and supplied in the powder supply apparatus. In addition, it is difficult to ensure the quantitativeness and uniformity of the powder raw material to be conveyed and supplied unless the powder raw material to be dispersed is reliably consolidated and the bulk density between flights is uniform.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and by rotating and driving a screw disposed in the barrel, the powder is conveyed and supplied along the axial direction of the barrel. In the supply, the powder raw material is compressed in the barrel to make the bulk density uniform, and the compressed powder raw material is conveyed by increasing the uniformity of the dispersion treatment. An object of the present invention is to provide a powder supply device capable of improving the quantitativeness of the powder raw material.

  In order to achieve the above object, the present invention is configured as follows.

  According to the first aspect of the present invention, there is provided a powder supply device that conveys and supplies a powder raw material using a screw, and the screw that conveys the powder raw material in the axial direction by being driven to rotate, The screw is disposed in the space, the first raw material into which the powder raw material is introduced, and the powder raw material conveyed from the first zone is compressed by rotating the screw, and the powder raw material is discharged from the outlet. A barrel having a second zone to be discharged, and a plurality of dispersion members fixed to the barrel along the circumferential direction so as to protrude from the inner surface of the barrel toward the inner space in the second zone. The powder material conveyed in the axial direction of the barrel is given resistance by a plurality of dispersing members to enhance the compressing action of the powder material, and the compressed powder material is brought into contact with the plurality of dispersing members. Dispersing the powder material Te provides a powder supplying device.

  According to the second aspect of the present invention, in the second zone, the powder raw material dispersed by the plurality of dispersion members is rotationally driven so as to give thrust in the axial direction of the barrel, and the powder is discharged from the outlet of the barrel. The powder supply apparatus according to the first aspect, further comprising a plurality of discharge blades for discharging the body material.

  According to the third aspect of the present invention, there is provided the powder supply apparatus according to the second aspect, wherein the plurality of discharge blades are rotationally driven together with the screw by a driving device that rotationally drives the screw.

  According to the fourth aspect of the present invention, in the second zone, notches are formed in the flight along the rotational direction of the screw so as to prevent interference between the respective dispersion members and the screw, On the other hand, the powder supply apparatus according to the second aspect or the third aspect, in which a flight located downstream in the conveyance direction of the powder raw material functions as a discharge blade, is provided.

  According to the fifth aspect of the present invention, the screw is a coil screw having a helical coil flight and a rotational driving force transmission shaft fixed to an end portion on the upstream side in the conveying direction of the powder raw material in the coil flight. Yes, with a plurality of discharge vanes fixed at one end and a discharge vane shaft connected to the rotational driving force transmission shaft at the other end. The discharge vane shaft is arranged on the spiral center of the coil flight and is driven to rotate. The powder supply apparatus according to the second aspect or the third aspect, which is rotationally driven integrally with a force transmission shaft.

  According to the sixth aspect of the present invention, each dispersion blade has a surface that is inclined with respect to the axial cross section of the barrel, and is rotated into the powder raw material by the rotation of the dispersion blade. A powder supply apparatus according to any one of the second to fifth aspects, which provides a thrust toward the discharge port outward.

  According to the seventh aspect of the present invention, in any one of the first to sixth aspects, the enlarged portion in which the diameter of the barrel is enlarged in the second zone is disposed on the downstream side of the dispersion member. A powder supply apparatus is provided.

  Moreover, you may make it arrange | position a part of discharge blade | wing outside the discharge port of a barrel.

  Moreover, you may make it the dispersion | distribution member be arrange | positioned in the multiple places along the axial direction of a barrel.

  Further, the dispersion member may be a rod-like member or a plate-like member.

  According to an eighth aspect of the present invention, there is provided a powder supply apparatus for conveying and supplying a powder raw material using a screw, wherein the screw conveys the powder raw material in the axial direction by being driven to rotate, A screw is disposed in the space, and the powder raw material is conveyed by rotating the screw so that the powder raw material is introduced from the first zone and the powder raw material conveyed from the first zone is discharged from the discharge port. A barrel having a second zone, and a plurality of dispersion members fixed to the barrel along the circumferential direction so as to protrude from the inner surface of the barrel toward the inner space in the second zone, The powder raw material conveyed in the axial direction of the barrel is given resistance by a plurality of dispersion members to compress the powder raw material, and the compressed powder raw material is brought into contact with the plurality of dispersion members to powder. Dispersing the raw material, to provide a powder supply device.

  According to the ninth aspect of the present invention, in the second zone, a space in which the flight of the screw is not formed is provided adjacent to the upstream side in the transport direction of the plurality of dispersion members. A powder supply apparatus is provided.

  According to the tenth aspect of the present invention, in the second zone, the powder raw material dispersed by the plurality of dispersion members is rotationally driven so as to give thrust in the axial direction of the barrel, and the powder is discharged from the outlet of the barrel. The powder supply apparatus according to the eighth aspect or the ninth aspect, further comprising a plurality of discharge blades for discharging the body material.

  Moreover, according to another aspect of the present invention, there is provided a powder supply apparatus that conveys and supplies a powder raw material using a screw, and the screw that conveys the powder raw material in the axial direction by being rotated. The first zone in which the screw is arranged in the internal space and the powder raw material is introduced, and the powder raw material by rotating the screw so that the powder raw material conveyed from the first zone is discharged from the discharge port. A barrel having a second zone in which conveyance is performed, and in the second zone, the powder raw material conveyed in the axial direction of the barrel is given resistance to compress the powder raw material, and the compressed powder Provided is a powder supply device including a plurality of dispersion members (or discharge blades) that disperse a powder raw material by contacting the raw material.

  Further, the dispersion member (or the discharge blade) may be a flat plate having a plane orthogonal to the conveying direction of the powder raw material.

  Further, the dispersion member (or the discharge blade) may be an inclined plate having a surface inclined with respect to the transport direction, and may have a region where a plurality of inclined plates overlap each other at the root portion (center portion).

  According to the present invention, since the plurality of dispersion members fixed to the barrel along the circumferential direction are provided so as to protrude from the inner surface of the barrel toward the internal space in the second zone of the barrel, Resistance can be given to the powder raw material conveyed in the axial direction of the barrel by a plurality of dispersing members, and the compression action of the powder raw material can be enhanced. Further, the powder raw material is rotated while performing relative rotation between the powder raw material conveyed while rotating along the inner circumference of the barrel by the rotational drive of the screw and the plurality of dispersion members fixed to the barrel. The dispersion member can be brought into contact with each other, and the dispersion effect of the powder raw material can be enhanced by utilizing the relative rotation between the two. Therefore, in the powder supply device, the powder raw material is compressed in the barrel to make the bulk density uniform, and the uniformity of the dispersion treatment to the compressed powder raw material is increased. Thus, the quantitativeness and uniformity of the powder raw material conveyed and supplied can be improved.

Sectional drawing of the powder supply apparatus concerning Embodiment 1 of this invention Side view of powder supply device of embodiment 1 Schematic configuration diagram of the powder supply apparatus according to Embodiment 1 AA line sectional view in the powder supply apparatus of FIG. External view of the second screw Sectional drawing of the powder supply apparatus concerning Embodiment 2 of this invention Sectional drawing of the powder supply apparatus concerning Embodiment 3 of this invention. BB sectional view in the powder supply apparatus of FIG. CC sectional view in the powder supply apparatus of FIG. Front view of the discharge vanes (viewed along line DD in FIG. 7) Side view of discharge blade Sectional drawing of the powder supply apparatus concerning Embodiment 4 of this invention. Sectional drawing of the powder supply apparatus concerning Embodiment 5 of this invention. Sectional drawing of the powder supply apparatus concerning Embodiment 6 of this invention. Sectional drawing of the powder supply apparatus concerning Embodiment 7 of this invention. Sectional drawing of the powder supply apparatus concerning Embodiment 8 of this invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
The configuration of the powder supply apparatus according to the first embodiment of the present invention will be described with reference to the apparatus configuration diagrams shown in FIGS. 1 and 2. 1 is a cross-sectional view as seen from the front side of the powder supply apparatus, and FIG. 2 is a side view of the apparatus.

  As shown in FIGS. 1 and 2, the powder supply apparatus 1 includes a hopper 2, an agitator 3, an introduction casing 4, a screw 5, a barrel 6, and a discharge casing 7.

  In the powder supply apparatus 1 according to the first embodiment, for example, a powder or granular material having a particle size distribution of 0.1 μm to several tens of μm is handled as a powder raw material. Such powder raw materials are used in various technical fields such as fine ceramics, metal materials, polymer materials, batteries / electronic materials, composite materials, pharmaceutical materials, food materials, etc., such as electronics, energy, medicine, and food. Inorganic and organic fine powders are targeted. Moreover, the powder raw material may be a case in which a plurality of types of powder raw materials (powder materials) are mixed.

  The hopper 2 is a device that supplies powder raw material to an introduction casing 4 that is communicated in the lower portion of the drawing, with the powder raw material being introduced through an opening that opens upward in the drawing. The hopper 2 is releasably connected to the introduction casing 4. For example, the hopper 2 can be separated from the introduction casing 4 during maintenance such as cleaning.

  As described above, the introduction casing 4 is disposed below the hopper 2 and communicated with the first zone of the powder raw material in the barrel 6 so that the powder raw material can be introduced. Has a function as a storage container for the powder raw material for continuously introducing. The detailed configuration of the barrel 6 will be described later.

  The agitator 3 is an apparatus for stirring the powder raw material so that partial aggregation such as a bridge does not occur in the powder raw material introduced into the introduction casing 4. Specifically, the agitator 3 is disposed in the introduction casing 4 and is driven to rotate about a horizontal rotation axis so as to agitate the powder raw material. 4 and an agitator driving device 32 that drives the agitating member 31 to rotate. In addition, the lower surface of the stirring space 41 in the introduction casing 4 serves as a rotation locus of the stirring member 31 so that the powder raw material in the introduction casing 4 is efficiently stirred by the stirring member 31 that is rotationally driven. It is formed as a substantially circumferential surface along (see FIG. 2).

  In the introduction casing 4, a powder raw material introduction space having a substantially U-shaped cross section whose upper part communicates with the stirring space 41 is provided at a lower portion of the stirring space 41 in which the stirring member 31 of the agitator 3 is rotated. 61 is formed. In the first embodiment, a part that defines the introduction space 61 (hereinafter referred to as a barrel casing 62) is a part of the barrel 6. Further, a powder raw material transfer pipe 63 is connected to the end of the barrel casing 62 so as to communicate with the barrel casing 62. That is, in the first embodiment, the barrel 6 includes a barrel casing 62 that forms an introduction space 61 below the stirring space 41 of the introduction casing 4, and a cylindrical conveyance that extends in communication with the barrel casing 62. The tube 63 is constituted. In the first embodiment, a case where the barrel casing 62 is formed integrally with a part of the introduction casing 4 will be described as an example. However, instead of such a case, the introduction casing 4 And the barrel casing 62 may be formed as separate members.

  The barrel 6 is generally formed in a substantially cylindrical shape, and the barrel casing 62 is opened at the top so that the introduction space 61 and the stirring space 41 are communicated with each other. A screw 5 is disposed in the barrel 6. The screw 5 has a screw shaft and a flight formed on the peripheral surface of the screw shaft, and a desired clearance is secured to such an extent that the outer peripheral end of the flight does not contact the inner peripheral surface of the barrel 6. Thus, the screw 5 is rotationally driven in the barrel 6 (that is, the barrel casing 62 and the transport pipe 63).

  Specifically, the screw 5 includes a first screw 51 disposed in the barrel casing 62 and a second screw 54 coupled to the first screw 51 and disposed in the transport pipe 63. The first screw 51 has a screw shaft 52 and a flight 53 formed on the circumferential surface of the screw shaft 52, and the second screw 54 is formed on the screw shaft 55 and the circumferential surface of the screw shaft 55. Flight 56.

  An end portion 52a of the screw shaft 52 of the first screw 51 is disposed so as to penetrate the side surface in the axial direction of the barrel casing 62, and a screw drive device 57 that rotationally drives the end portion 52a of the screw shaft 52 includes: It is provided on the side surface of the barrel casing 62. The screw drive device 57 includes a drive motor 58 (see FIG. 2) and a gear box 59 that converts the driving force of the drive motor 58 into a predetermined rotation amount to drive the first screw 51 to rotate. .

  The downstream end of the conveying pipe 63 in the barrel 6 is a discharge port 63a through which the powder raw material is discharged from the barrel 6, and the discharge port 63 a communicates with the discharge casing 7. The discharge casing 7 is provided with a filter unit 71 that captures the powder raw material that has risen in the internal space.

  In addition, each component in the powder supply apparatus 1 is supported by a common base 8.

  Next, in the powder supply apparatus 1 having such a configuration, the relationship between the screw 5 and the barrel 6 will be described in detail with reference to FIG.

  As shown in FIG. 3, the barrel 6 is roughly divided into two zones in the conveying direction. Specifically, as the two zones, the first zone S1 into which the powder raw material is introduced and the powder raw material conveyed from the first zone S1 are compressed, and the powder raw material is moved out of the barrel 6. It is divided into a second zone S2 for discharging. In addition, it can be said that the second zone is a zone in which the powder raw material is generally transported in the transport pipe 63.

  The first zone S1 is mainly configured by the barrel casing 62 and the first screw 51, but may be a case where a part of the transport pipe 63 and the second screw 54 is included. In the first zone S 1, the powder raw material stirred by the agitator 3 is introduced into the introduction space 61 formed between the barrel casing 62 and the first screw 51 through the hopper 2 and the introduction casing 4. Is done. As shown in FIGS. 1 and 3, in the first zone S1, the angle of the flight 53 (the angle formed by the axial direction and the flight 53) is set to be relatively small, and the pitch of the flight 53 is ensured to be wide. Thus, the powder raw material is introduced more uniformly between the flights 53.

  The second zone S <b> 2 is mainly configured by the transport pipe 63 and the second screw 54. In the second zone S2, the conveyance pipe 63 has a narrowed shape so that the diameter of the conveyance pipe 63 on the downstream side is smaller than the upstream side in the conveyance direction. For this reason, the volume of the space formed between the second screw 54 and the inner periphery of the transport pipe 63 decreases as it goes downstream, whereby the powder raw material is compressed. By compressing the powder raw material in the second zone S2, the powder raw material between the flights 56 is consolidated, and the powder raw material being conveyed can be quantified and uniformized. In the second zone S2, the angle of the flight 56 is set to be relatively large, and the pitch of the flight 56 is set to be relatively narrow.

  The powder raw material compressed in the transport pipe 63 is quantitatively transported toward the discharge port 63a and is discharged into the discharge casing 7 from the discharge port 63a.

  In addition, a plurality of dispersion members 64 fixed to the inner surface of the transport pipe 63 are provided in the vicinity of the discharge port 63 a of the transport pipe 63 so as to protrude from the inner surface of the transport pipe 63 toward the internal space. As shown in FIG. 4, which is a cross-sectional view taken along line AA in FIG. 3, four dispersion members 64 are provided as, for example, rod-shaped members, and extend from the inner surface of the transport pipe 63 toward the center in the radial direction. Are arranged. A gap that does not contact each other is secured between the tip of the dispersion member 64 and the peripheral surface of the screw shaft 55 of the second screw 54. The dispersion member 64 is fixed to the transport pipe 63, and the second screw 54 is rotated relative to the dispersion member 64. Utilizing this relative rotation, the powder raw material compressed in the second zone S2 and the respective dispersion members 63 are brought into contact with each other, whereby a shearing force is effectively applied to the powder raw material. And the powder raw material can be uniformly dispersed.

  Further, since such a dispersion member 64 is provided in the vicinity of the discharge port 63 a of the transport pipe 63, resistance is given to the powder raw material transported in the transport pipe 63 from the plurality of dispersion members 64. be able to. By imparting such resistance, the compression action on the powder raw material can be enhanced.

  Further, as shown in the external view of the second screw 54 in FIGS. 3 and 5, at the position where the dispersion member 64 is provided in the second zone S <b> 2, in the circumferential direction (that is, the rotation direction of the second screw 54). (Noted) are formed in the flight 56 to prevent interference between the respective dispersion members 64 and the flight 56. Such a cutout 57 is preferably formed in a size that does not allow the dispersion member 64 and the flight 56 to contact each other.

  Further, in the second zone S2, the flight 58 of the second screw 54 is also formed downstream of the installation position of the dispersion member 64. By this flight 58, it is possible to apply a thrust force to advance the powder raw material dispersed by the dispersion member 64.

  An operation of conveying and supplying the powder raw material in the powder supply apparatus 1 of the first embodiment having such a configuration will be described.

  First, when a powder raw material is introduced into the hopper 2, the charged powder raw material is introduced into the introduction casing 4. In the stirring space 41 of the introduction casing 4, the stirring member 31 is rotationally driven by the agitator driving device 32 to stir the powder raw material, thereby suppressing the occurrence of partial aggregation such as a bridge. At the same time, the powder raw material is introduced into the first zone S 1 in the barrel 6.

  In the first zone S 1, the first screw 51 is disposed in the barrel casing 62, and the introduced powder raw material is introduced into the space between the flights 53 of the first screw 51. The first screw 51 is rotationally driven by a screw driving device 57, and the powder raw material introduced between the flights 53 is conveyed along the axial direction by the rotational driving of the first screw 51, and enters the second zone S2. Head to.

  In the second zone S2, the second screw 54 is rotationally driven by the screw driving device 57 together with the first screw 51. The powder raw material conveyed from the first zone S <b> 1 is moved between the flights 56 of the second screw 54 and is conveyed along the axial direction by the rotational drive of the second screw 54. In the second zone S2, the volume of the space formed between the second screw 54 and the inner periphery of the transport pipe 63 is set so as to decrease as it goes downstream. The powder raw material is compressed. Furthermore, since the plurality of dispersion members 64 are provided in the vicinity of the discharge port 63a of the transport pipe 63, the dispersion member 64 becomes a resistance, and the compressing action on the powder raw material to be transported can be enhanced. By compressing the powder raw material in this manner, the powder raw material can be arranged in a state of being compacted between the flights 56, and the bulk density of the powder raw material can be kept constant.

  On the other hand, in the second zone S <b> 2, the powder raw material is conveyed while rotating along the inner periphery of the conveying pipe 63 by the second screw 54 being driven to rotate. When the powder raw material thus conveyed comes into contact with the respective dispersion members 64 fixed to the conveyance pipe 63, the powder raw material is consolidated by the relative rotation of the powder raw material with respect to the dispersion member 64. On the other hand, a shearing force is applied from the dispersion member 64. The powder raw material consolidated by this shearing force is effectively dispersed, and the powder raw material in the consolidated state is uniformly dispersed.

  The powder raw material in the dispersed state is given a thrust to advance by the flight 58 provided on the downstream side of the dispersing member 64. Thereby, the powder raw material in a uniformly dispersed state is discharged in a quantitative and uniform state into the discharge casing 7 from the discharge port 63a.

  According to the powder supply device 1 of the first embodiment, the volume of the space formed between the second screw 54 and the inner periphery of the transport pipe 63 in the second zone S2 goes downstream. Since it is set so as to decrease, the powder raw material can be compressed together with the conveyance of the powder raw material. Further, since a plurality of dispersion members 64 are provided in the vicinity of the discharge port 63a of the transport pipe 63, resistance is given to the powder raw material to be transported by the dispersion member 64, and compression action on the powder raw material Can be increased. By compressing the powder raw material in this way, the powder raw material can be arranged in a compacted state between the flights 56, and the bulk density of the powder raw material can be kept constant in the second zone S2. Can do.

  In the second zone S <b> 2 of the barrel 6, a plurality of dispersion members 64 fixed to the transport pipe 63 are provided so as to protrude from the inner surface of the transport pipe 63 toward the internal space. Therefore, the powder raw material conveyed while rotating along the inner periphery of the conveying pipe 63 by the rotation drive of the second screw 54 is rotated relative to the respective dispersion members 64. Therefore, by bringing the powder material compressed and consolidated in the second zone S2 into contact with the dispersion member, the dispersion effect on the powder material can be enhanced by utilizing relative rotation.

  Further, since the flight 58 is provided on the downstream side of the installation position of the dispersion member 64, a propulsive force that moves forward is given to the powder raw material dispersed by the dispersion member 64, and quantitatively. It can be discharged from the discharge port 63a.

  Therefore, in the powder supply apparatus 1, the quantitativeness and uniformity of the powder raw material conveyed and supplied can be improved.

(Embodiment 2)
In addition, this invention is not limited to the said Embodiment 1, It can implement in another various aspect. For example, FIG. 6 shows the configuration of the powder supply apparatus 101 according to the second embodiment of the present invention. In FIG. 6, the same reference numerals are assigned to the same components as those in the powder supply apparatus 1 of the first embodiment, and the description thereof is omitted. Hereinafter, only differences from the powder supply apparatus 1 of the first embodiment will be described.

  As shown in FIG. 6, in the second zone S2, the powder supply apparatus 101 according to the second embodiment is provided with an enlarged portion having an enlarged barrel inner diameter at the downstream end portion of the transport pipe. This is different from the powder supply apparatus 1 of the first embodiment.

  Specifically, the downstream end of the transport pipe 163 connected to and communicated with the barrel casing 62 is formed to have a diameter larger than the diameter of the portion reduced in the second zone S2. This portion is an enlarged portion 165 having an enlarged internal volume.

  A dispersion member 64 is installed at the entrance of the enlarged portion 165. Further, in the portion of the second screw 54 arranged in the enlarged portion 165, the outer diameter of the flight 158 is enlarged more than the upstream flight 56 in accordance with the diameter of the enlarged portion 165 of the transport pipe 163. A flight notch 57 is provided between the upstream flight 56 and the downstream flight 158 to prevent interference between the dispersion member 64 and the flight.

  In this way, in the second zone S2, by providing the barrel 6 with the enlarged portion 165, a space in which the powder raw material can be agitated can be secured around the dispersion member 64 (particularly on the downstream side). The dispersion effect on the body material can be further enhanced. Therefore, in the second zone S2, the powder raw material consolidated on the upstream side of the dispersion member 64 is effectively dispersed by the dispersion member 64 in the enlarged portion 165, and the dispersed powder. The body material can be conveyed downstream by the flight 158 and discharged in a quantitative and uniform state from the discharge port 165a.

(Embodiment 3)
Next, the structure of the powder supply apparatus 201 concerning Embodiment 3 of this invention is shown in FIG. In FIG. 7, the same reference numerals are assigned to the same components as those in the powder supply device of the above-described embodiment, and the description thereof is omitted. In FIG. 7, in the powder supply apparatus 201, the configuration of the screw and the barrel is mainly illustrated.

  As shown in FIG. 7, the powder supply device 201 includes a first screw 251 disposed in the barrel casing 62 and a second screw 254 coupled to the first screw 251 and disposed in the transport pipe 263. A screw 205 configured and a barrel 206 in which the screw 205 is disposed are provided. The first screw 251 has a screw shaft 252 and a flight 253 formed on the circumferential surface of the screw shaft 252, and the second screw 254 is formed on the screw shaft 255 and the circumferential surface of the screw shaft 255. Flight 256.

  The barrel 206 includes a barrel casing 62 and a transport pipe 263 that communicates with and extends to the barrel casing 62. In the barrel 206, the first screw 251 is mainly disposed in the barrel casing 62, and this portion is the first zone S1, and the second screw 254 is mainly disposed in the transport pipe 263, and this portion is This is the second zone S2. Unlike the transport pipes of the first and second embodiments, the transport pipe 263 is formed to have a constant diameter along the transport direction without being enlarged or reduced in diameter.

  In the first zone S1, as shown in FIG. 7, the angle of the flight 253 is set to be relatively small, and the pitch of the flight 253 is ensured so that the powder material is introduced more uniformly between the flights 253. To be.

  On the other hand, in the second zone S2, the angle of the flight 256 is set larger than the angle in the first zone S1, and the pitch of the flight 256 is set narrower than the pitch in the first zone S1. In the second zone S <b> 2, the angle and pitch of the flight 256 are set as described above, whereby the powder raw material conveyed along with the rotation of the screw 205 is compressed. By compressing the powder raw material in the second zone S2, the powder raw material between the flights 256 is consolidated, and the powder raw material being conveyed can be quantified and uniformized.

  As shown in FIG. 7, a plurality of dispersion members 64 are arranged in the vicinity of the discharge port 263 a of the transport pipe 263 so as to protrude in the radial direction from the inner peripheral surface of the transport pipe 263. The plurality of dispersion members 64 are provided at a plurality of locations in the axial direction of the transport pipe 263. That is, the plurality of dispersion members 64 are provided in multiple stages in the axial direction of the transport pipe 263. For example, eight dispersion members 64 are radially arranged at equal intervals, and these eight dispersion members 64 are provided at three positions (that is, three stages) in the axial direction of the transport pipe 263, respectively. Yes. Further, the radial arrangement of the dispersion member 64 shown in FIG. 8 which is a sectional view taken along the line BB in FIG. 7 is different from the radial arrangement of the dispersion member 64 shown in FIG. 9 which is a sectional view taken along the line CC. Thus, the installation positions (circumferential positions) of the dispersion members 64 adjacent in the axial direction are set so as not to overlap each other in the axial direction. 7 shows only the attachment position of the dispersion member 64 on the inner peripheral surface of the transport pipe 263, and the specific attachment state of each dispersion member 64 is shown in FIG. 8 and FIG. Yes.

  By disposing the dispersing member 64 in this way, the powder raw material and the dispersing member 64 can be efficiently contacted, and the dispersion effect on the powder raw material can be enhanced. In addition, since the plurality of dispersion members 64 can provide resistance to the powder raw material that is transported in the transport pipe 263, the compressing action of the powder raw material can be enhanced in the transport pipe 263.

  Further, in the second screw 254, the flight 256 is not formed at a place where the dispersion member 64 is installed, and interference between the dispersion member 64 and the second screw 254 is prevented. Further, a space 265 in which no flight 256 exists is disposed between the plurality of dispersion members 64 and the downstream end portion of the second screw 254 in the transport direction of the flight 256. In this space 265, resistance can be given from the plurality of dispersion members 64 to the powder raw material conveyed by the rotational drive of the second screw 254, and the compression action can be effectively enhanced.

  As shown in FIG. 7, a plurality of discharge blades 281 for discharging the powder raw material in the discharge pipe 263 from the discharge port 263 a are provided in the discharge port 263 a of the transport pipe 263. Here, the details of the discharge blade 281 are shown in FIGS. 10A and 10B. In addition, FIG. 10A is a DD line arrow line view of FIG.

  As shown in FIGS. 7, 10 </ b> A, and 10 </ b> B, the discharge vane 281 is formed of a plate-like member, is fixed to the end of the screw shaft 255 of the second screw 254, and is radial from the circumferential surface of the screw shaft 255. It extends to. Each discharge blade 281 is formed such that the outer portion is inclined with respect to the central portion in the radial direction. Specifically, each discharge blade 281 is rotationally driven integrally with the screw shaft 255, and in a direction to apply a thrust in the conveying (discharge) direction to the surrounding powder raw material by being rotationally driven. The outer part is inclined.

  In the third embodiment, for example, eight discharge blades 281 are provided at equal intervals. Further, as shown in FIG. 10A, a part of the discharge blade 281 is located in the transport pipe 263, and the other part is located outside the transport pipe 263. More specifically, the rotational direction front end portion 281 a of each discharge blade 281 is positioned in the transport pipe 263, and the rotational direction rear end portion 281 b is positioned outside the transport pipe 263. In FIG. 10A, the rotation direction of each discharge blade 281 is the counterclockwise direction shown in the figure.

  Since the plurality of discharge blades 281 are provided in this way, and each discharge blade 281 has an inclined portion, the discharge blades can be applied to the powder material after passing through the dispersion member 64. Propulsive force in the conveying direction can be given by the inclined portion 281 and the powder raw material can be discharged stably from the discharge port 263a.

  Further, since the discharge blade 281 is fixed to the screw shaft 255 and is rotationally driven by the screw shaft 255, it is necessary to provide a dedicated drive device for rotationally driving the discharge blade 281. There is no.

  In addition, since a part of the discharge blade 281 is positioned outside the transport pipe 263, the powder raw material in the transport pipe 263 can be efficiently discharged.

  In addition, since the edge of the rotationally driven discharge blade 281 contacts the powder raw material, the dispersion effect of the powder raw material can be enhanced.

  Further, as shown in FIG. 10A, a plurality of discharge blades 281 are arranged so as to overlap in the axial direction in the vicinity of the center around the rotation center in the radial arrangement of the discharge blades 281 (particularly in the vicinity of the periphery of the screw shaft 255). . Therefore, in such overlapping regions, it is possible to provide resistance to the powder raw material being conveyed, and to obtain an effect of increasing the compression action on the powder raw material. By providing such resistance, the bulk density of the powder raw material in the space 265 can be made uniform, and the quantitativeness and uniformity of the powder supply in the powder supply apparatus 201 can be improved. Note that by changing the area of such overlapping regions, it is possible to change the resistance applied to the powder raw material and adjust the compression effect. In addition, in the discharge blade 281, the region that gives resistance to the powder raw material in this way can also be called a resistance applying region.

  According to the powder supply apparatus 201 of the third embodiment, it is possible to improve the quantitativeness and uniformity of the powder raw material conveyed and supplied.

(Embodiment 4)
Next, the structure of the powder supply apparatus 301 concerning Embodiment 4 of this invention is shown in FIG. In FIG. 11, the same components as those in the above-described embodiment of the powder supply apparatus are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 11, in the powder supply device 301, in the first screw 351 and the second screw 354 constituting the screw 305, each flight is formed in the same form (pitch, angle), This is different from the screw 205 of the third embodiment described above. The configuration other than the flight configuration is the same as that of the third embodiment.

  In this way, even if the flight is formed at a constant pitch and angle in the screw 305, resistance can be imparted to the conveyed powder raw material by the plurality of dispersion members 64. Therefore, the powder raw material can be compressed. In addition, since the space 265 formed by the flight of the second screw 354 not being formed is disposed adjacent to the upstream side of the dispersion member 64 in the transport direction, the space 265 is driven by the rotation of the second screw 354. Resistance can be effectively applied to the powder raw material conveyed inside by the respective dispersion members 64, and the powder raw material can be compressed.

(Embodiment 5)
Next, the structure of the powder supply apparatus 401 concerning Embodiment 5 of this invention is shown in FIG. In FIG. 12, the same reference numerals are assigned to the same components as those in the powder supply device of the above-described embodiment, and the description thereof is omitted.

  As shown in FIG. 12, in the powder supply apparatus 401 of the fifth embodiment, a coil screw 451 is provided as a screw. The coil screw 451 includes, for example, a coil flight 452 formed in a spiral shape having a square cross-sectional shape, and a rotational driving force transmission shaft 453 fixed to the end of the coil flight 452 on the upstream side in the conveying direction of the powder material. I have. The rotational driving force transmission shaft 453 is connected to the screw driving device 57 to transmit the rotational driving force, and thereby the coil flight 452 is rotationally driven. Note that the coil flight 452 will be described as an example having a square cross section, but other cross sectional shapes (for example, a circular cross section) may be employed.

  The plurality of discharge blades 281 installed in the discharge port 263a of the transport pipe 263 is one end (downstream) of the discharge blade shaft 282 disposed on the spiral center of the coil flight 452 (that is, the central axis of the transport pipe 263). It is fixed to the side edge. The other end (upstream end portion) of the discharge blade shaft 282 is connected to the end portion of the rotational driving force transmission shaft 453, and the discharge blade shaft 282 is rotationally driven together with the rotational driving force transmission shaft 453. It is configured as follows. The shaft diameter of the discharge blade shaft 282 is smaller than the inner diameter of the coil flight 452.

  In the powder supply device 401, the coil screw 451 is employed, so that the powder raw material having the characteristic that it easily adheres to the surface of a member such as a screw shaft due to the influence of humidity or the like is applied to the coil screw 451. Can be suppressed, and stable conveyance can be performed.

  On the other hand, in such a coil screw 451, the compression action by the screw itself is lower than that of the screw shaft 305 or the like due to the characteristics of the helical coil flight 452. However, since a plurality of dispersion members 64 are installed in the vicinity of the discharge port 263a of the transport pipe 263, resistance can be imparted to the powder raw material and the compression action can be enhanced.

  As described above, the coil screw 451 that can suppress the adhesion of the powder raw material due to the influence of humidity or the like is employed, the reduction of the compression action due to the characteristics of the coil screw 451 is compensated by the plurality of dispersion members 64, and By obtaining a dispersion effect on the body material, quantitative and uniform conveyance of the powder material can be realized.

  Further, since the discharge blade shaft 282 for rotating the discharge blade 281 is disposed inside the coil flight 452, it is possible to suppress the powder raw material from staying in the vicinity of the central axis of the transport pipe 263. It is possible to improve the quantitativeness and uniformity in the conveyance of the raw material.

(Embodiment 6)
Next, the structure of the powder supply apparatus 501 concerning Embodiment 6 of this invention is shown in FIG. In FIG. 13, the same reference numerals are assigned to the same components as those of the powder supply device of the above-described embodiment, and the description thereof is omitted.

  As shown in FIG. 13, the powder supply apparatus 501 has a configuration in which the plurality of dispersion members 64 in the powder supply apparatus 301 of Embodiment 4 in FIG. 11 are not provided.

  A plurality of discharge blades 281 are provided in the discharge port 263 a of the transport pipe 263. As shown in FIGS. 10A and 10B, the discharge blade 281 has a plurality of plate-like members arranged radially, and an outer peripheral portion thereof is inclined.

  The plurality of discharge blades 281 are arranged so as to overlap each other in the central region of the discharge port 263a. Therefore, resistance can be given to a powder raw material by the area | region where the some discharge blade | wing 281 overlaps contacting with a powder raw material. In addition, a space 282 in which no flight exists is disposed between the discharge blade 281 and the downstream end of the flight of the second screw 354. In this space 282, the powder raw material conveyed by the second screw 354 comes into contact with the plurality of discharge blades 281 so that resistance can be effectively applied to the powder raw material, Compression can be performed.

  Further, when the inclined end portions and the outer peripheral end portions of the plurality of discharge blades 281 that are driven to rotate come into contact with the powder raw material, the compressed powder raw material is dispersed. The dispersed powder material is given thrust from the discharge blade 281 and discharged from the discharge port 263a.

  Therefore, by providing a plurality of discharge blades 281 in the discharge port 263a of the transfer pipe 263, the powder raw material transferred into the space 282 can be compressed by applying resistance, and can be rotated. Dispersion can be performed on the powder raw material by bringing the inclined edge and the outer peripheral end of the discharge blade 281 into contact with the compressed powder raw material.

  In such a powder supply device 501, a compression unit based on the form of the screw 205 or the barrel 206, such as partially setting the flight interval of the screw 305 or partially reducing the diameter of the barrel 206, is provided. Without being provided, the powder raw material conveyed into the space 282 can be compressed by the plurality of discharge blades 281. Therefore, in the powder supply apparatus 501, the form of a barrel and a screw can be made into a simple form, and the powder supply apparatus 501 can be made into a simple structure.

  Since the powder raw material is compressed in the space 282, the region where the space 282 is disposed can also be called a compression zone.

  10A and 10B, the case where the plurality of discharge blades 281 are configured as inclined blades has been described as an example. However, as a flat blade that is not inclined (a flat plate having a plane orthogonal to the transport direction). good. By making the discharge vane into a flat blade, the area where the discharge vane contacts the powder raw material can be increased. Therefore, resistance can be effectively given to the powder raw material, and the compression action can be enhanced. Moreover, even if it is a case where it is set as a flat blade | wing, the dispersion | distribution effect with respect to a powder raw material can also be acquired.

  It is preferable that the discharge blade capable of exhibiting the compressing action and the dispersing action is constituted by a plate-like member having a width that is wider than the thickness. Further, in the central region (root portion) in the radial arrangement, the discharge blades are preferably arranged so as to overlap each other, and in particular, when the discharge blades are configured as inclined blades, the discharge blades It is preferable to arrange them so as to overlap each other. Moreover, the magnitude | size of the resistance given to a powder raw material can be changed by changing the area of the area | region where discharge blades overlap, and a compression effect can be adjusted.

(Embodiment 7)
Next, the structure of the powder supply apparatus 601 concerning Embodiment 7 of this invention is shown in FIG. In FIG. 14, the same components as those in the above-described embodiment of the powder supply apparatus are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 14, the powder supply apparatus 601 has a configuration in which the plurality of dispersion members 64 in the powder supply apparatus 401 of the fifth embodiment of FIG. 12 are not provided.

  In this way, the configuration of performing the compressing action and the dispersing action on the powder raw material using the plurality of discharge blades 281 can be applied to the powder supply apparatus 601 using the coil screw 451.

(Embodiment 8)
Next, FIG. 15 shows a configuration of a powder supply apparatus 701 according to the eighth embodiment of the present invention. In FIG. 15, the same components as those in the above-described embodiment of the powder supply apparatus are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 15, in the powder supply device 701, a vibration device 709 is attached to the hopper 2. The vibration device 709 is a device that prevents agglomeration such as a bridge from occurring in the powder material by directly or indirectly imparting vibration to the powder material in the hopper 2. In the powder supply device 701, when the screw 5 is rotationally driven, the vibration device 709 is driven to vibrate the powder raw material, and when the drive of the screw 5 is stopped, the vibration device 709 Operation control is performed so that driving is also stopped.

  The powder supply device 701 includes a measuring device 708 that supports the components such as the screw 5, the barrel 6, and the hopper 2 and measures the weight of the powder raw material in these components. The weighing device 708 can detect the weight of the powder raw material discharged out of the apparatus by driving the powder supply apparatus 701. Specifically, when the powder raw material is discharged from the state where the powder raw material exists up to the material level L1 in the hopper 2 and the powder raw material is reduced to the material level L2, ( By measuring the weight of the powder raw material at L1) − (weight at the time of the powder raw material L2) with the measuring device 708, the discharge amount of the powder raw material can be calculated.

  In this way, in the hopper 2, by applying vibration to the powder raw material from the vibration device 709, it is possible to prevent the powder raw material from agglomerating such as bridges and to supply the powder raw material stably. .

  In addition, the measurement of the discharge amount of the powder raw material includes a configuration in which the powder raw material discharged from the discharge casing 7 is directly measured in addition to the configuration in which the powder raw material is indirectly measured (so-called loss-in measurement) like the measuring device 708. It is also good.

  In the above description, the case where the plurality of dispersion members 64 are provided in the second zone S2 has been described as an example. However, if at least one dispersion member 64 is provided, a dispersion effect on the powder raw material can be obtained.

  The dispersion member 64 may be a plate-like member in addition to a rod-like member, and may adopt various cross-sectional shapes such as a circular shape and a triangular shape. Further, as the dispersing member 64 approaches the screw shaft 255 from the inner peripheral surface of the transport pipe 263, the cross section thereof may be narrowed. Thereby, the uniformity of the bulk density of the powder raw material that has been subjected to the dispersion treatment can be improved.

  Further, the dispersion member 64 may be a fixed form in which the dispersion member 64 is directly or indirectly fixed to the inner surface of the transport pipe 63 or the like and the second screw 54 is rotated relative to the dispersion member 64.

  Further, in the embodiment of FIG. 4 and the like, the embodiment has been described in which the four dispersion members 64 are extended from the inner surface of the transport pipe 63 toward the center in the radial direction. May be a direction inclined with respect to the radial direction. Moreover, the case where the some dispersion | distribution member 64 is integrally formed may be sufficient. For example, an annular member having a plurality of projecting portions protruding in the radial direction from the annular inner peripheral surface may be employed as the plurality of dispersing members.

  8 and FIG. 9, an example has been described in which a plurality of dispersing members 64 provided in multiple stages have the same length, but the length of the dispersing member 64 may be different depending on each stage. For example, with respect to the first stage dispersion member 64 (the stage corresponding to FIG. 8), the length of the second stage dispersion member (the stage corresponding to FIG. 9) is shortened, and the tip of the dispersion member and the screw 255 are reduced. You may enlarge the distance between the surrounding surfaces. In such a case, the uniformity of the bulk density of the powder raw material subjected to the dispersion treatment can be improved.

  Further, if the dispersion member 64 is provided on the downstream side of the second zone S2 that compresses the powder raw material, a dispersion effect on the powder raw material can be obtained. Accordingly, the hopper 2, the agitator 3, the introduction casing 4, the first zone S <b> 1 of the barrel 6, etc. can take forms other than those described above.

  Further, the screw 5 has been described as an example in which the first screw 51 having a single thread and the second screw 54 having a double thread are connected, but the screw 5 may have an integral structure. In addition, various specifications may be adopted for the number of threads. In addition, as described above, various types of screws such as a coil screw can be employed.

  Moreover, the powder supply apparatus 1 is provided with a measuring device for measuring the weight of the powder raw material in the apparatus, and the weight of the powder raw material in the apparatus is reduced by the powder raw material being transported and discharged outside the apparatus. It is good also as a powder supply apparatus which measures this and makes the amount of weight reduction quantitative.

  In the above description, the case where the powder supply device has a single-shaft configuration including one screw has been described as an example. However, a two-axis configuration including two screws may be adopted, and three or more shafts may be used. A configuration may be adopted.

  In addition, it can be made to show the effect which each has by combining suitably arbitrary embodiment of the said various embodiment.

DESCRIPTION OF SYMBOLS 1 Powder supply apparatus 2 Hopper 3 Agitator 4 Introducing casing 5 Screw 6 Barrel 7 Discharging casing 8 Common base 51 First screw 54 Second screw 62 Barrel casing 63 Conveying pipe 64 Dispersing member 281 Discharge blade

Claims (10)

A powder supply device for conveying and supplying a powder raw material using a screw,
A screw that is rotationally driven to convey the powder raw material in the axial direction;
A screw is disposed in the internal space, the powder raw material is introduced into the first zone, and the powder raw material conveyed from the first zone is compressed by rotating the screw, and the powder raw material is discharged from the outlet. A barrel comprising a second zone to be more discharged;
A plurality of dispersion members fixed to the barrel along the circumferential direction so as to protrude from the inner surface of the barrel toward the internal space in the second zone;
In the second zone, the powder raw material conveyed in the axial direction of the barrel is given resistance by a plurality of dispersion members to enhance the compression action of the powder raw material, and the compressed powder raw material is supplied to the plurality of dispersion members A powder supply device that disperses the powder raw material in contact with the powder.   In the second zone, a plurality of discharge vanes that are rotationally driven to give thrust in the axial direction of the barrel to the powder raw material dispersed by the plurality of dispersing members and discharge the powder raw material from the outlet of the barrel The powder supply apparatus according to claim 1, further comprising:   The powder supply device according to claim 2, wherein the plurality of discharge blades are rotationally driven together with the screw by a driving device that rotationally drives the screw. In the second zone, notches are formed in the flight along the rotational direction of the screw so as to prevent interference between the respective dispersion members and the screw,
The powder supply apparatus according to claim 2 or 3, wherein a flight located downstream of the dispersion member in the conveying direction of the powder material functions as a discharge blade. The screw is a coil screw having a helical coil flight and a shaft for transmitting a rotational driving force fixed to an end on the upstream side in the conveying direction of the powder raw material in the coil flight,
A plurality of discharge blades are fixed to one end, and the other end includes a discharge blade shaft connected to a rotational driving force transmission shaft,
The powder supply apparatus according to claim 2 or 3, wherein the discharge blade shaft is disposed on the spiral center of the coil flight and is rotationally driven integrally with the rotational driving force transmission shaft.   Each of the dispersion blades has a surface inclined with respect to the axial cross section of the barrel, and gives an outward thrust to the powder raw material on the inclined surface by rotation driving of the dispersion blade. The powder supply apparatus according to any one of claims 2 to 5.   The powder supply apparatus according to any one of claims 1 to 6, wherein the enlarged portion in which the diameter of the barrel is enlarged in the second zone is disposed on the downstream side of the dispersion member. A powder supply device for conveying and supplying a powder raw material using a screw,
A screw that is rotationally driven to convey the powder raw material in the axial direction;
A screw is arranged in the internal space, and the powder material is conveyed by rotating the screw so that the powder material introduced from the first zone and the powder material conveyed from the first zone are discharged from the discharge port. A barrel with a second zone in which
In the second zone, comprising a plurality of dispersion members fixed to the barrel along the circumferential direction so as to protrude from the inner surface of the barrel toward the internal space,
In the second zone, the powder raw material conveyed in the axial direction of the barrel is given resistance by a plurality of dispersing members to compress the powder raw material, and the compressed powder raw material is converted into a plurality of dispersing members. A powder feeder that disperses the powder raw material by contact.   The powder supply apparatus according to claim 8, wherein in the second zone, a space in which a flight of screws is not formed is provided adjacent to the upstream side in the conveyance direction of the plurality of dispersion members.   In the second zone, a plurality of discharge vanes that are rotationally driven to give thrust in the axial direction of the barrel to the powder raw material dispersed by the plurality of dispersing members and discharge the powder raw material from the outlet of the barrel The powder supply apparatus according to claim 8 or 9, further comprising:

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