JP6797411B2 - Rotary powder compression molding equipment - Google Patents

Rotary powder compression molding equipment Download PDF

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JP6797411B2
JP6797411B2 JP2017100883A JP2017100883A JP6797411B2 JP 6797411 B2 JP6797411 B2 JP 6797411B2 JP 2017100883 A JP2017100883 A JP 2017100883A JP 2017100883 A JP2017100883 A JP 2017100883A JP 6797411 B2 JP6797411 B2 JP 6797411B2
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powder
passage portion
mortar
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supply
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JP2018192517A (en
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陽介 富田
陽介 富田
遠藤　太郎
太郎 遠藤
長谷川　浩司
浩司 長谷川
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Powrex KK
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable

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Description

本発明は、例えば医薬品等の粉末の圧縮成形を行なう回転式粉末圧縮成形装置に関する。 The present invention relates to a rotary powder compression molding apparatus that performs compression molding of powders such as pharmaceuticals.

例えば医薬品等の粉末に対して圧縮成形を行なって錠剤等の圧縮成形体を製造する粉末圧縮成形装置（例えば打錠機等）の１種として、回転式粉末圧縮成形装置がある。 For example, there is a rotary powder compression molding apparatus as one kind of powder compression molding apparatus (for example, a tableting machine) for producing a compression molded product such as a tablet by compression molding a powder of a pharmaceutical product or the like.

この回転式粉末圧縮成形装置は、上下方向の軸線の周りに回転駆動される回転盤と、前記回転盤に所定の回転方向間隔で設けられた複数の臼孔と、前記臼孔に回転方向の所定位置で粉末を供給する粉末供給部と、前記臼孔に反対方向から挿入され、前記臼孔に供給された粉末を圧縮成形する一対の杵とを具備する。 This rotary powder compression molding apparatus includes a rotary disk that is rotationally driven around an axis in the vertical direction, a plurality of mortar holes provided in the rotary disk at predetermined rotational direction intervals, and the mortar holes in the rotational direction. It includes a powder supply unit that supplies powder at a predetermined position, and a pair of punches that are inserted into the mortar hole from the opposite direction and compress-mold the powder supplied to the mortar hole.

そして、前記粉末供給部が、粉末供給源に通じる受入口と前記臼孔に粉末を供給する供給口とが設けられ、前記受入口と前記供給口とを連通する通路部（以下、フィーダとも記す）を備える（例えば特許文献１，２参照）。 The powder supply unit is provided with a receiving port leading to the powder supply source and a supply port for supplying powder to the mortar, and a passage portion (hereinafter, also referred to as a feeder) communicating the receiving port and the supply port. ) (See, for example, Patent Documents 1 and 2).

このフィーダの種類には、例えば、粉末を撹拌する撹拌羽根を有する撹拌フィーダと、撹拌羽根を有さないオープンフィーダがある。 Types of this feeder include, for example, a stirring feeder having a stirring blade for stirring powder and an open feeder having no stirring blade.

撹拌フィーダでは、粉末の積高さに起因する粉末の重力落下と、撹拌羽根の回転による粉末の移送とによって、粉末が回転盤面上へ移動する。オープンフィーダでは、ホッパから直接回転盤面上に粉末が供給される。つまり、オープンフィーダでは、粉末原料の積高さに起因する重力落下によって、粉末が回転盤面上に移動する。 In the stirring feeder, the powder moves onto the surface of the turntable by the gravity drop of the powder due to the pile height of the powder and the transfer of the powder by the rotation of the stirring blade. In the open feeder, powder is supplied directly from the hopper onto the surface of the turntable. That is, in the open feeder, the powder moves on the surface of the turntable due to the gravity drop caused by the pile height of the powder raw material.

特許第５８３２７７５号公報Japanese Patent No. 5823775 特許第５８４７４７７号公報Japanese Patent No. 5847477

ところで、流動性が悪い粉末を圧縮成形する場合等（例えば粉末が大きな安息角を有する等の場合）では、錠剤等の圧縮成形体の重量のバラツキ（粉末の臼孔への充填バラツキ）が大きくなることがある。つまり、フィーダによる粉末の臼孔への充填性が低下することがある。 By the way, in the case of compression molding of powder having poor fluidity (for example, when the powder has a large angle of repose), the weight variation of the compression molded product such as tablets (the variation in filling the mortar of the powder) is large. May become. That is, the filler may reduce the filling property of the powder into the mortar.

本発明は、上記事情に鑑み、回転式粉末圧縮成形装置において、フィーダによる粉末の臼孔への充填性を向上させることを技術的課題とする。 In view of the above circumstances, it is a technical subject of the present invention to improve the filling property of the powder into the mortar by the feeder in the rotary powder compression molding apparatus.

上記課題を解決するために創案された本発明に係る回転式粉末圧縮成形装置は、上下方向の軸線の周りに回転駆動される回転盤と、前記回転盤に所定の回転方向間隔で設けられた複数の臼孔と、前記臼孔に回転方向の所定位置で粉末を供給する粉末供給部と、前記臼孔に反対方向から挿入され、前記臼孔に供給された粉末を圧縮成形する一対の杵とを具備し、前記粉末供給部が、粉末供給源に通じる受入口と前記臼孔に粉末を供給する供給口とが設けられ、前記受入口と前記供給口とを連通する通路部を備える回転式粉末圧縮成形装置において、前記通路部は、前記受入口から供給された粉末を前記供給口まで案内する案内面を有し、前記案内面が、前記供給口に向かって下り勾配で傾斜していることを特徴とする。 The rotary powder compression molding apparatus according to the present invention, which was devised to solve the above problems, is provided with a rotary disk that is rotationally driven around an axis in the vertical direction and a rotary disk that is rotationally driven at predetermined intervals in the rotational direction. A plurality of mortar holes, a powder supply unit that supplies powder to the mortar holes at a predetermined position in the rotational direction, and a pair of punches that are inserted into the mortar holes from opposite directions and compress-mold the powder supplied to the mortar holes. The powder supply unit is provided with a receiving port leading to the powder supply source and a supply port for supplying powder to the mortar, and is provided with a passage portion communicating the receiving port and the supply port. In the type powder compression molding apparatus, the passage portion has a guide surface for guiding the powder supplied from the receiving port to the supply port, and the guide surface is inclined downward toward the supply port. It is characterized by being.

この構成では、通路部の案内面が傾斜しているので、受入口から案内面上に供給された粉末が、案内面に沿って重力に由来した力を受ける。このため、受入口から供給された粉末が供給口まで移動することが容易である。これに伴い、受入口から供給された粉末を供給口から臼孔に供給することが容易となる。従って、圧縮成形体の重量のバラツキ（臼孔への粉末の充填バラツキ）を減少させることができる。すなわち、本発明に係る回転式粉末圧縮成形装置によれば、通路部（フィーダ）による粉末の臼孔への充填性を向上させることができる。 In this configuration, since the guide surface of the passage portion is inclined, the powder supplied from the receiving port onto the guide surface receives a force derived from gravity along the guide surface. Therefore, the powder supplied from the receiving port can easily move to the supply port. Along with this, it becomes easy to supply the powder supplied from the receiving port to the mortar through the supply port. Therefore, it is possible to reduce the variation in the weight of the compression molded product (the variation in filling the mortar with the powder). That is, according to the rotary powder compression molding apparatus according to the present invention, it is possible to improve the filling property of the powder into the mortar by the passage portion (feeder).

また、従来であれば通路部内の底面に残り易かった粉末を、供給口から排出し易くなる。更には、異方性を有する臼孔に対しても、１つの臼孔内で均一になるように充填することができる。 In addition, the powder, which conventionally tends to remain on the bottom surface of the passage portion, can be easily discharged from the supply port. Further, the anisotropic mortar can be filled uniformly in one mortar.

上記の構成において、前記通路部に、粉末を撹拌する撹拌羽根が配設されていてもよい。 In the above configuration, a stirring blade for stirring the powder may be provided in the passage portion.

この構成であれば、撹拌羽根の回転によって粉末を移動させることが可能なので、更に、受入口から供給された粉末が供給口まで移動することが容易となる。 With this configuration, the powder can be moved by the rotation of the stirring blade, so that the powder supplied from the receiving port can be easily moved to the supply port.

また、上述したように、撹拌羽根が配設されている通路部（撹拌フィーダ）では、粉末の回転盤面上への移動は、粉末の積高さに起因する粉末の重力落下と、撹拌羽根の回転による粉末の移送とによって行なわれる。しかし、従来の撹拌フィーダの底面、すなわち回転盤面近傍では、撹拌羽根の回転数が粉末の移動に対して優位に作用する。これは、従来の撹拌フィーダの底面上での粉末の臼孔への移動方向は、回転盤面に対して平行（水平方向）となるためである。従って、従来の撹拌フィーダで、粉末の臼孔への充填性を向上させるためには、撹拌羽根の回転数を増加させることが考えられるが、撹拌羽根の回転数を増加させると、圧縮成形体の硬度の低下や、圧縮成形体が錠剤の場合には、錠剤崩壊時間の遅延をもたらす可能性がある。つまり、従来の撹拌フィーダの撹拌羽根の回転数の増加は、圧縮成形体の品質に悪影響を与える可能性がある。 Further, as described above, in the passage portion (stirring feeder) in which the stirring blades are arranged, the movement of the powder onto the rotating disk surface is caused by the gravity drop of the powder due to the pile height of the powder and the stirring blades. It is carried out by the transfer of powder by rotation. However, on the bottom surface of the conventional stirring feeder, that is, in the vicinity of the rotating disk surface, the rotation speed of the stirring blade has an advantage on the movement of the powder. This is because the direction of movement of the powder on the bottom surface of the conventional stirring feeder to the mortar is parallel (horizontal direction) to the surface of the turntable. Therefore, in order to improve the filling property of the powder into the mortar with the conventional stirring feeder, it is conceivable to increase the rotation speed of the stirring blade, but if the rotation speed of the stirring blade is increased, the compression molded body If the compression molded product is a tablet, the hardness of the tablet may be reduced, and the tablet disintegration time may be delayed. That is, an increase in the number of rotations of the stirring blades of the conventional stirring feeder may adversely affect the quality of the compression molded product.

これに対し、本発明の撹拌羽根が配設されている通路部では、その案内面が、供給口に向かって下り勾配で傾斜していることにより、粉末の臼孔への充填性を向上させることが可能である。そのため、従来の撹拌フィーダとは異なり、粉末の臼孔への充填性の向上のための撹拌羽根の回転数の増加を抑制することが可能である。従って、撹拌羽根の回転数の増加による圧縮成形体の品質への悪影響を抑制することができる。 On the other hand, in the passage portion where the stirring blade of the present invention is arranged, the guide surface thereof is inclined downward toward the supply port, so that the filling property of the powder into the mortar hole is improved. It is possible. Therefore, unlike the conventional stirring feeder, it is possible to suppress an increase in the rotation speed of the stirring blade for improving the filling property of the powder into the mortar. Therefore, it is possible to suppress an adverse effect on the quality of the compression molded product due to an increase in the rotation speed of the stirring blade.

上記の構成において、前記粉末供給部は、前記粉末供給源に通じる第２の受入口が設けられ、該第２の受入口と前記通路部の前記受入口とを連通し、前記通路部の前記受入口を介して前記通路部に粉末を供給する第２の通路部を備えていてもよい。 In the above configuration, the powder supply unit is provided with a second receiving port leading to the powder supply source, and the second receiving port and the receiving port of the passage part are communicated with each other to communicate with the receiving port of the passage part. A second passage portion for supplying powder to the passage portion via the receiving port may be provided.

この構成において、前記第２の通路部に、粉末を撹拌する第２の撹拌羽根が配設されていれば、撹拌羽根の回転によって粉末を移動させることが可能なので、第２の受入口から供給された粉末が通路部の受入口まで移動することが容易となる。 In this configuration, if a second stirring blade for stirring the powder is provided in the second passage portion, the powder can be moved by the rotation of the stirring blade, so that the powder is supplied from the second receiving port. It becomes easy for the powder to move to the receiving port of the passage portion.

上記の構成において、前記案内面の水平面に対する傾斜角度が、粉末の安息角以上であってもよい。ここで、安息角の測定方法は、ＪＩＳ Ｒ９３０１−２−２（１９９９）に準拠する。 In the above configuration, the angle of inclination of the guide surface with respect to the horizontal plane may be equal to or greater than the angle of repose of the powder. Here, the method for measuring the angle of repose conforms to JIS R9301-2-2 (1999).

この構成であれば、粉末が案内面上を供給口まで移動し易くなる。 With this configuration, the powder can easily move on the guide surface to the supply port.

以上のように、本発明によれば、回転式粉末圧縮成形装置において、フィーダによる粉末の臼孔への充填性を向上させることができる。 As described above, according to the present invention, in the rotary powder compression molding apparatus, it is possible to improve the filling property of the powder into the mortar by the feeder.

本発明の実施形態に係る回転式粉末圧縮成形装置の概略断面図である。It is the schematic sectional drawing of the rotary powder compression molding apparatus which concerns on embodiment of this invention. 本発明の回転式粉末圧縮成形装置の変形例の概略断面図である。It is the schematic sectional drawing of the modification of the rotary powder compression molding apparatus of this invention.

図１は、本発明の実施形態に係る回転式粉末圧縮成形装置の概略断面図である。この回転式粉末圧縮成形装置１は、例えば医薬品等の粉末に対して圧縮成形を行なって錠剤等の圧縮成形体を製造する打錠機等である。 FIG. 1 is a schematic cross-sectional view of a rotary powder compression molding apparatus according to an embodiment of the present invention. The rotary powder compression molding apparatus 1 is, for example, a tableting machine or the like that performs compression molding on powder of a pharmaceutical product or the like to produce a compression molded product such as a tablet.

回転式粉末圧縮成形装置１は、回転盤２と、臼３と、粉末供給部４と、一対の杵（上杵５、下杵６）とを具備する。回転盤２は、上下方向の回転中心軸線Ａの周りに不図示の駆動源によって回転駆動される。臼３は、回転盤２に所定の回転方向間隔で複数設けられており、臼孔７を有する。臼孔７は、中心軸が上下方向に沿っており、回転盤２を貫通している。粉末供給部４は、回転盤２の回転方向の所定位置で、臼３の臼孔７に粉末を供給する。上杵５と下杵６は、臼３の臼孔７に反対方向から挿入され、臼３の臼孔７に供給された粉末を圧縮成形する。 The rotary powder compression molding apparatus 1 includes a turntable 2, a mortar 3, a powder supply unit 4, and a pair of punches (upper punch 5 and lower punch 6). The turntable 2 is rotationally driven around a rotation center axis A in the vertical direction by a drive source (not shown). A plurality of mortars 3 are provided on the turntable 2 at predetermined intervals in the rotation direction, and have mortar holes 7. The mortar hole 7 has a central axis along the vertical direction and penetrates the turntable 2. The powder supply unit 4 supplies powder to the mortar hole 7 of the mortar 3 at a predetermined position in the rotation direction of the turntable 2. The upper punch 5 and the lower punch 6 are inserted into the mortar hole 7 of the mortar 3 from opposite directions, and the powder supplied to the mortar hole 7 of the mortar 3 is compression-molded.

粉末供給部４は、第１通路部８と第２通路部９とを備える。第１通路部８は、粉末供給源としてのホッパ１０に通じる第１受入口８ａと臼孔７に粉末を供給する供給口８ｂとが設けられ、第１受入口８ａと供給口８ｂとを連通する。供給口８ｂの周縁部の下側には、シール部８ｃが設けられており、供給口８ｂと回転盤２との間から粉末が漏れることを抑制している。第２通路部９は、ホッパ１０にホッパ用通路１０ａ等を介して通じる第２受入口９ａが設けられ、第２受入口９ａと第１通路部８の第１受入口８ａとを連通し、第１通路部８の第１受入口８ａを介して第１通路部８に粉末を供給する。第１通路部８、第２通路部９、ホッパ１０は、臼３上から回転盤２の外周側に配設されている。 The powder supply unit 4 includes a first passage unit 8 and a second passage unit 9. The first passage portion 8 is provided with a first receiving port 8a leading to the hopper 10 as a powder supply source and a supply port 8b for supplying powder to the mortar hole 7, and communicates the first receiving port 8a and the supply port 8b. To do. A seal portion 8c is provided below the peripheral edge portion of the supply port 8b to prevent powder from leaking from between the supply port 8b and the turntable 2. The second passage portion 9 is provided with a second entrance 9a that communicates with the hopper 10 via the hopper passage 10a or the like, and communicates the second entrance 9a with the first inlet 8a of the first passage portion 8. The powder is supplied to the first passage portion 8 via the first receiving port 8a of the first passage portion 8. The first passage portion 8, the second passage portion 9, and the hopper 10 are arranged on the outer peripheral side of the turntable 2 from above the mortar 3.

第１通路部８は、第１受入口８ａから供給された粉末を供給口８ｂまで案内する案内面８ｄを有する。案内面８ｄは、第１通路部８の内側の底面であり、平面状である。案内面８ｄは、第１受入口８ａ側から供給口８ｂに向かって下り勾配で傾斜している。なお、第１通路部８の内側の上面８ｅも平面状であり、案内面８ｄと同様に傾斜している。 The first passage portion 8 has a guide surface 8d that guides the powder supplied from the first receiving port 8a to the supply port 8b. The guide surface 8d is a bottom surface inside the first passage portion 8 and is flat. The guide surface 8d is inclined downward from the first receiving port 8a side toward the supply port 8b. The upper surface 8e inside the first passage portion 8 is also flat and is inclined in the same manner as the guide surface 8d.

案内面８ｄの水平面に対する傾斜角度θは、例えば、粉末の安息角以上であるが、これに限定されず、粉末の安息角未満であってもよい。なお、案内面８ｄ上の粉末の質量をｍ、重力加速度をｇとすると、この粉末にかかる案内面８ｄに沿った重力の分力の大きさは、ｍ×ｇ×ｓｉｎθとなる。 The inclination angle θ of the guide surface 8d with respect to the horizontal plane is, for example, greater than or equal to the angle of repose of the powder, but is not limited to this, and may be less than the angle of repose of the powder. Assuming that the mass of the powder on the guide surface 8d is m and the gravitational acceleration is g, the magnitude of the component force of gravity along the guide surface 8d applied to the powder is m × g × sin θ.

第１通路部８には、粉末を撹拌する第１撹拌羽根１１が配設されている。第１撹拌羽根１１は、第１軸線Ｂの周りに不図示の駆動源により回転駆動される。図示は省略するが、第１撹拌羽根１１は、例えば、第１軸線Ｂが通る基部と、該基部から第１軸線Ｂに垂直な方向に放射状に延びる羽根部から構成される（特許文献１，２参照）。第１軸線Ｂは、案内面８ｄに対して垂直である。また、第１撹拌羽根１１の第１底面１１ａは、案内面８ｄに隙間を介して対向している。また、第１撹拌羽根１１の第１底面１１ａは、案内面８ｄに対して平行であり、案内面８ｄと同様に傾斜している。また、第１撹拌羽根１１の回転盤２の側の端部は、供給口８ｂの上方に位置する。 A first stirring blade 11 for stirring powder is provided in the first passage portion 8. The first stirring blade 11 is rotationally driven around the first axis B by a drive source (not shown). Although not shown, the first stirring blade 11 is composed of, for example, a base portion through which the first axis line B passes and a blade portion extending radially from the base portion in a direction perpendicular to the first axis line B (Patent Documents 1 and 1). 2). The first axis B is perpendicular to the guide surface 8d. Further, the first bottom surface 11a of the first stirring blade 11 faces the guide surface 8d with a gap. Further, the first bottom surface 11a of the first stirring blade 11 is parallel to the guide surface 8d and is inclined in the same manner as the guide surface 8d. Further, the end portion of the first stirring blade 11 on the rotating disk 2 side is located above the supply port 8b.

第２通路部９は、第２受入口９ａから供給された粉末が供給口８ｂまでその上を移動する内側の底面９ｂを有する。内側の底面９ｂは、平面状であり、水平面に沿っている。なお、第２通路部９の内側の上面９ｃも、平面状であり、水平面に沿っている。 The second passage 9 has an inner bottom surface 9b through which the powder supplied from the second inlet 9a travels over it to the supply port 8b. The inner bottom surface 9b is flat and runs along a horizontal plane. The upper surface 9c inside the second passage portion 9 is also flat and is along the horizontal plane.

第２通路部９には、粉末を撹拌する第２撹拌羽根１２が配設されている。第２撹拌羽根１２は、第２軸線Ｃの周りに不図示の駆動源により回転駆動される。図示は省略するが、第２撹拌羽根１２は、例えば、第２軸線Ｃが通る基部と、該基部から第２軸線Ｃに垂直な方向に放射状に延びる羽根部から構成される（特許文献１，２参照）。第２軸線Ｃは、内側の底面９ｂに対して垂直である。また、第２撹拌羽根１２の第２底面１２ａは、内側の底面９ｂに隙間を介して対向している。また、第２撹拌羽根１２の第２底面１２ａは、内側の底面９ｂに対して平行であり、水平面に沿っている。また、第２撹拌羽根１２の回転盤２の側の端部は、第１受入口８ａの上方に位置する。 A second stirring blade 12 for stirring the powder is provided in the second passage portion 9. The second stirring blade 12 is rotationally driven around the second axis C by a drive source (not shown). Although not shown, the second stirring blade 12 is composed of, for example, a base portion through which the second axis C passes and a blade portion extending radially from the base portion in a direction perpendicular to the second axis C (Patent Documents 1 and 1). 2). The second axis C is perpendicular to the inner bottom surface 9b. Further, the second bottom surface 12a of the second stirring blade 12 faces the inner bottom surface 9b with a gap. The second bottom surface 12a of the second stirring blade 12 is parallel to the inner bottom surface 9b and is along the horizontal plane. Further, the end portion of the second stirring blade 12 on the rotating disk 2 side is located above the first receiving port 8a.

次に、回転式粉末圧縮成形装置１の稼働時における粉末供給部４の動作について説明する。 Next, the operation of the powder supply unit 4 during the operation of the rotary powder compression molding apparatus 1 will be described.

最初に、ホッパ１０に、所定量の粉末が充填される。すると、ホッパ１０から第２通路部９の第２受入口９ａを介して第２通路部９内に粉末が供給される。 First, the hopper 10 is filled with a predetermined amount of powder. Then, the powder is supplied from the hopper 10 into the second passage portion 9 via the second reception port 9a of the second passage portion 9.

第２通路部９内に供給された粉末は、粉末の積高さに起因する粉末の重力落下と、第２撹拌羽根１２の回転による粉末の移送とによって、第１受入口８ａまで移動する。そして、第１受入口８ａまで移動した粉末は、第１受入口８ａから第１通路部８に供給される。 The powder supplied into the second passage portion 9 moves to the first receiving port 8a by the gravity drop of the powder due to the pile height of the powder and the transfer of the powder by the rotation of the second stirring blade 12. Then, the powder that has moved to the first receiving port 8a is supplied from the first receiving port 8a to the first passage portion 8.

第１通路部８に供給された粉末は、粉末の積高さに起因する粉末の重力落下と、第１撹拌羽根１１の回転による粉末の移送と、更に、案内面８ｄと第１撹拌羽根１１の傾斜による粉末の流動とによって、供給口８ｂまで移動する。そして、供給口８ｂまで移動した粉末は、重力の作用により、供給口８ｂの直下に位置する臼孔７に供給される。 The powder supplied to the first passage portion 8 is the gravity drop of the powder due to the pile height of the powder, the transfer of the powder by the rotation of the first stirring blade 11, and the guide surface 8d and the first stirring blade 11. Due to the flow of powder due to the inclination of, it moves to the supply port 8b. Then, the powder that has moved to the supply port 8b is supplied to the mortar hole 7 located directly below the supply port 8b by the action of gravity.

以上のように構成された本実施形態の回転式粉末圧縮成形装置１では、以下の効果を享受できる。 The rotary powder compression molding apparatus 1 of the present embodiment configured as described above can enjoy the following effects.

第１通路部８の案内面８ｄが傾斜しているので、第１受入口８ａから供給された粉末が、案内面８ｄに沿って重力に由来した力を受ける。このため、第１受入口８ａから供給された粉末が供給口８ｂまで移動することが容易である。これに伴い、第１受入口８ａから供給された粉末を供給口８ｂから臼孔７に供給することが容易となる。従って、圧縮成形体の重量のバラツキ（臼孔７への粉末の充填バラツキ）を減少させることができる。すなわち、本実施形態に係る回転式粉末圧縮成形装置１によれば、第１通路部８（フィーダ）による粉末の臼孔７への充填性を向上させることができる。 Since the guide surface 8d of the first passage portion 8 is inclined, the powder supplied from the first inlet 8a receives a force derived from gravity along the guide surface 8d. Therefore, the powder supplied from the first receiving port 8a can easily move to the supply port 8b. Along with this, the powder supplied from the first receiving port 8a can be easily supplied to the mortar hole 7 from the supply port 8b. Therefore, it is possible to reduce the variation in the weight of the compression molded product (the variation in filling the mortar hole 7 with the powder). That is, according to the rotary powder compression molding apparatus 1 according to the present embodiment, the filling property of the powder into the mortar hole 7 by the first passage portion 8 (feeder) can be improved.

また、従来であれば通路部内の底面に残り易かった粉末を、供給口８ｂから排出し易くなる。更には、異方性を有する臼孔に対しても、１つの臼孔内で均一になるように充填することができる。 In addition, the powder, which conventionally tends to remain on the bottom surface of the passage portion, can be easily discharged from the supply port 8b. Further, the anisotropic mortar can be filled uniformly in one mortar.

本発明は、上記の実施形態に限定されること無く、その技術的思想の範囲内で様々な変形が可能である。例えば、上記実施形態では、粉末供給部４は、第１通路部８と第２通路部９とを備えていたが、図２に示すように、粉末供給部４は、第１通路部８だけを備えていてもよい。この場合、図２に示すように、第１通路部８の第１受入口８ａは、ホッパ用通路１０ａ等を介さずに、直接、ホッパ１０に通じていてもよい。 The present invention is not limited to the above embodiment, and various modifications can be made within the scope of its technical idea. For example, in the above embodiment, the powder supply unit 4 includes the first passage portion 8 and the second passage portion 9, but as shown in FIG. 2, the powder supply unit 4 has only the first passage portion 8. May be provided. In this case, as shown in FIG. 2, the first receiving port 8a of the first passage portion 8 may directly communicate with the hopper 10 without passing through the hopper passage 10a or the like.

また、上記実施形態では、粉末供給部４の第１通路部８には、第１撹拌羽根１１が配設されていたが、図２に示すように、第１通路部８に、第１撹拌羽根１１が配設されていなくてもよい。 Further, in the above embodiment, the first stirring blade 11 is arranged in the first passage portion 8 of the powder supply portion 4, but as shown in FIG. 2, the first stirring portion 8 is provided with the first stirring. The blades 11 may not be arranged.

また、上記実施形態では、回転式粉末圧縮成形装置１は、中心軸が上下方向に沿った臼孔７と、上杵５及び下杵６を備えていたが、図２に示すように、中心軸が横方向に沿った臼孔７と、外周側杵１３及び内周側杵１４を備えていてもよい。この場合、回転盤２上面に開口して臼孔７に繋がる臼孔用通路１５が設けられており、供給口８ｂから臼孔７に臼孔用通路１５を介して粉末が供給される。 Further, in the above embodiment, the rotary powder compression molding apparatus 1 includes a mortar hole 7 whose central axis is along the vertical direction, and an upper punch 5 and a lower punch 6, but as shown in FIG. 2, the center A mortar hole 7 whose shaft is along the lateral direction may be provided, and an outer peripheral side punch 13 and an inner peripheral side punch 14 may be provided. In this case, a mortar passage 15 that opens on the upper surface of the turntable 2 and connects to the mortar hole 7 is provided, and powder is supplied from the supply port 8b to the mortar 7 via the mortar passage 15.

また、上記実施形態では、第１通路部８、第２通路部９、ホッパ１０は、臼３上から回転盤２の外周側に配設されていたが、図２に示すように、第１通路部８やホッパ１０は、臼３上から回転盤２の内周側に配設されていてもよい。 Further, in the above embodiment, the first passage portion 8, the second passage portion 9, and the hopper 10 are arranged on the outer peripheral side of the turntable 2 from above the mortar 3, but as shown in FIG. The passage portion 8 and the hopper 10 may be arranged on the inner peripheral side of the turntable 2 from above the mortar 3.

また、上記実施形態では、第１通路部８の案内面８ｄは、平面状であり、傾斜角度θが一定であったが、供給口８ｂに向かって下り勾配であれば、曲面状であってもよいし、また、傾斜角度が途中で変化してもよい。 Further, in the above embodiment, the guide surface 8d of the first passage portion 8 is flat and the inclination angle θ is constant, but if it is a downward slope toward the supply port 8b, it is curved. Alternatively, the tilt angle may change in the middle.

また、上記実施形態では、第２通路部９の内側の底面９ｂは、平面状であり、水平面に沿っていたが、曲面状であってもよいし、水平面に対して傾斜していてもよい。内側の底面９ｂが水平面に対して傾斜する場合には、第１受入口８ａに向かって下り勾配であることが好ましい。この時、内側の底面９ｂの傾斜角度が途中で変化してもよい。 Further, in the above embodiment, the bottom surface 9b inside the second passage portion 9 is flat and along the horizontal plane, but may be curved or inclined with respect to the horizontal plane. .. When the inner bottom surface 9b is inclined with respect to the horizontal plane, it is preferable that the inner bottom surface 9b is inclined downward toward the first receiving port 8a. At this time, the inclination angle of the inner bottom surface 9b may change on the way.

１ 回転式粉末圧縮成形装置
２ 回転盤
４ 粉末供給部
５ 上杵
６ 下杵
７ 臼孔
８ 第１通路部
８ａ 第１受入口
８ｂ 供給口
８ｄ 案内面
９ 第２通路部
９ａ 第２受入口
１０ ホッパ（粉末供給源）
１１ 第１撹拌羽根
１２ 第２撹拌羽根
１３ 外周側杵
１４ 内周側杵
Ａ 回転中心軸線
θ 傾斜角度 1 Rotary powder compression molding device 2 Rotating disk 4 Powder supply section 5 Upper punch 6 Lower punch 7 Usu hole 8 1st passage 8a 1st inlet 8b Supply port 8d Guide surface 9 2nd passage 9a 2nd inlet 10 Hopper (powder source)
11 1st stirring blade 12 2nd stirring blade 13 Outer peripheral side punch 14 Inner peripheral side punch A Rotation center axis θ Tilt angle

Claims (2)

上下方向の軸線の周りに回転駆動される回転盤と、前記回転盤に所定の回転方向間隔で設けられた複数の臼孔と、前記臼孔に回転方向の所定位置で粉末を供給する粉末供給部と、前記臼孔に反対方向から挿入され、前記臼孔に供給された粉末を圧縮成形する一対の杵とを具備し、
前記粉末供給部が、粉末供給源に通じる受入口と前記臼孔に粉末を供給する供給口とが設けられ、前記受入口と前記供給口とを連通する通路部を備える回転式粉末圧縮成形装置において、
前記通路部は、前記受入口から供給された粉末を前記供給口まで案内する案内面を有し、
前記案内面が、前記供給口に向かって下り勾配で傾斜しており、
前記通路部に、粉末を撹拌する撹拌羽根が配設されており、
前記粉末供給部は、前記粉末供給源に通じる第２の受入口が設けられ、該第２の受入口と前記通路部の前記受入口とを連通し、前記通路部の前記受入口を介して前記通路部に粉末を供給する第２の通路部を備え、
前記第２の通路部に、粉末を撹拌する第２の撹拌羽根が配設されており、
前記供給口は、前記臼孔に粉末を供給するために前記回転盤に設けられた開口部に対向しており、
前記受入口が、前記供給口に対して水平方向で離隔しており、
前記第２の通路部は、水平面に沿った平面状の内側の底面を有することを特徴とする回転式粉末圧縮成形装置。 A rotary disk that is rotationally driven around an axis in the vertical direction, a plurality of mortar holes provided in the rotary disk at predetermined rotational direction intervals, and a powder supply that supplies powder to the mortar holes at a predetermined position in the rotational direction. A portion and a pair of punches that are inserted into the mortar from the opposite direction and compress-mold the powder supplied to the mortar.
A rotary powder compression molding apparatus in which the powder supply unit is provided with a receiving port leading to a powder supply source and a supply port for supplying powder to the mortar, and is provided with a passage portion communicating the receiving port and the supply port. In
The passage portion has a guide surface for guiding the powder supplied from the receiving port to the supply port.
The guide surface is inclined downward toward the supply port .
A stirring blade for stirring the powder is provided in the passage portion.
The powder supply unit is provided with a second reception port leading to the powder supply source, communicates the second reception port with the reception port of the passage portion, and passes through the reception port of the passage portion. A second passage portion for supplying powder to the passage portion is provided.
A second stirring blade for stirring the powder is arranged in the second passage portion.
The supply port faces an opening provided in the turntable for supplying powder to the mortar.
The inlet is horizontally separated from the supply port.
The rotary powder compression molding apparatus, wherein the second passage portion has a flat inner bottom surface along a horizontal plane . 前記案内面の水平面に対する傾斜角度が、粉末の安息角以上であることを特徴とする請求項１に記載の回転式粉末圧縮成形装置。 The rotary powder compression molding apparatus according to claim 1, wherein the inclination angle of the guide surface with respect to the horizontal plane is equal to or greater than the angle of repose of the powder.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021123339B3 (en) 2021-09-09 2022-08-25 Fette Compacting Gmbh Filling device for filling cavities of a rotary press as well as rotary press and system for the continuous processing of powdery products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021123339B3 (en) 2021-09-09 2022-08-25 Fette Compacting Gmbh Filling device for filling cavities of a rotary press as well as rotary press and system for the continuous processing of powdery products

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