JP2022067416A - Rotary powder compression molding apparatus - Google Patents

Rotary powder compression molding apparatus Download PDF

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JP2022067416A
JP2022067416A JP2020176111A JP2020176111A JP2022067416A JP 2022067416 A JP2022067416 A JP 2022067416A JP 2020176111 A JP2020176111 A JP 2020176111A JP 2020176111 A JP2020176111 A JP 2020176111A JP 2022067416 A JP2022067416 A JP 2022067416A
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powder
lubricant
raw material
mixing
material powder
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JP7471647B2 (en
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浩司 長谷川
Koji Hasegawa
琢也 長門
Takuya Nagato
陽介 富田
Yosuke Tomita
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Powrex KK
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30Feeding material to presses
    • B30B15/302Feeding material in particulate or plastic state to moulding presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B11/00Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02Presses 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
    • B30B11/08Presses 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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  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Abstract

To suppress excessive mixing of a lubricant with powder to be compression-molded, without causing adverse effects such as those caused by an external lubrication technique, in a rotary powder compression molding apparatus.SOLUTION: A powder supply unit 4 provided in a rotary powder compression molding apparatus includes a hopper unit 7, a lubricant supply pipe 8, a mixing unit 12, and an introduction unit 10. A hopper unit 7 supplies raw material powder to the mixing unit 12. The lubricant supply pipe 8 supplies lubricant to the mixing unit 12. The mixing unit 12 is provided below the hopper unit 7 and the lubricant supply pipe 8. A first stirring blade 11 that stirs and mixes the raw material powder and the lubricant to make mixed powder is disposed in the mixing unit 12. The introduction unit 10 is provided below the mixing unit 12 and introduces the mixed powder made by the mixing unit 12 into a mortar hole.SELECTED DRAWING: Figure 2

Description

本発明は、粉末に圧縮成形を行なうことにより、例えば医薬品の錠剤等の圧縮成形体を製造する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 for producing a compression molded body such as a tablet of a pharmaceutical product by compression molding a powder.

粉末に対して圧縮成形を行なうことにより、例えば医薬品の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。 There is a rotary powder compression molding apparatus as one kind of powder compression molding apparatus (for example, a tablet press) for producing a compression molded body such as a pharmaceutical tablet by performing compression molding on a powder.

この回転式粉末圧縮成形装置は、上下方向に沿った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、前記回転盤の回転方向の所定位置で、粉末を前記臼孔に供給する粉末供給部と、前記臼孔に相反する方向から挿入され、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 along the vertical direction, a plurality of mortar holes provided in the rotary disk at predetermined rotational direction intervals, and rotation of the rotary disk. It comprises a powder supply unit that supplies powder to the mortar at a predetermined position in the direction, and a pair of mortars that are inserted from opposite directions to the mortar and compression-mold the powder supplied to the mortar.

ところで、従来、粉末圧縮成形装置を用いた錠剤等の圧縮成形体の製造方法は、ホッパ等から供給される滑沢剤混合後の粉末を圧縮成形し、圧縮成形体を形成する圧縮成形工程を備える(例えば、特許文献1参照)。 By the way, conventionally, in the method of manufacturing a compression molded product such as a tablet using a powder compression molding apparatus, a compression molding step of forming a compression molded product by compression molding the powder after mixing with a lubricant supplied from a hopper or the like is performed. (See, for example, Patent Document 1).

特開2019-25495号公報Japanese Unexamined Patent Publication No. 2019-25495 特開2006-334515号公報Japanese Unexamined Patent Publication No. 2006-334515

しかしながら、このような製造方法では、次のような問題があった。すなわち、粉末と滑沢剤を混合する滑沢剤混合工程において、混合時間の延長や混合時における過剰な撹拌力は、粉末の粒子表面上への滑沢剤の展延をもたらし、滑沢剤の過混合と呼ばれる状態を引き起こす。過混合状態で粉末を圧縮成形すると、圧縮成形体の硬度の低下や崩壊時間の遅延、また溶出速度の低下などをもたらす可能性がある。さらに滑沢剤混合工程の後の圧縮成形工程への粉末の輸送や圧縮成形装置の粉末充填フィーダの作用により、粉末と滑沢剤の混合状態が変化して過混合状態となり、圧縮成形体の特性に影響を与える可能性がある。したがって、このような状態では、望ましい圧縮成形体特性を実現できないケースが存在する。 However, such a manufacturing method has the following problems. That is, in the lubricant mixing step of mixing the powder and the lubricant, the extension of the mixing time and the excessive stirring force at the time of mixing bring about the spread of the lubricant on the particle surface of the powder, and the lubricant. Causes a condition called overmixing. When the powder is compression-molded in an overmixed state, the hardness of the compression-molded article may be lowered, the disintegration time may be delayed, and the elution rate may be lowered. Furthermore, due to the transport of powder to the compression molding process after the lubricant mixing step and the action of the powder filling feeder of the compression molding device, the mixed state of the powder and the lubricant changes to an overmixed state, and the compression molded product May affect characteristics. Therefore, in such a state, there are cases where the desired compression molded product characteristics cannot be realized.

滑沢剤の過混合状態を抑止する方法として、圧縮成形工程内で滑沢剤を金型(臼杵)へ噴霧する外部滑沢技術が知られている(例えば、特許文献2参照)。しかし、圧縮成形装置内で滑沢剤を噴霧することで、装置内での滑沢剤の飛散の発生や圧縮成形体に含まれる滑沢剤の量が不明瞭になるという問題が存在する。 As a method of suppressing an overmixed state of the lubricant, an external lubricant technique for spraying the lubricant onto a mold (usuki) in a compression molding process is known (see, for example, Patent Document 2). However, by spraying the lubricant in the compression molding device, there is a problem that the lubricant is scattered in the device and the amount of the lubricant contained in the compression molded product becomes unclear.

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、外部滑沢技術で生じるような弊害を起こすことなく、圧縮成形される粉末に対する滑沢剤の過混合状態を抑制することを技術的課題とする。 In view of the above circumstances, the present invention is a technique for suppressing an overmixed state of a lubricant with a powder to be compression-molded in a rotary powder compression molding apparatus without causing an adverse effect as caused by an external lubricant technique. It is an issue.

上記課題を解決するために創案された本願発明に係る回転式粉末圧縮成形装置は、上下方向に沿った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、前記回転盤の回転方向の所定位置で、原料粉末と滑沢剤との混合粉末を前記臼孔に供給する粉末供給部と、前記臼孔に相反する方向から挿入され、前記臼孔に供給された前記混合粉末を圧縮成形する一対の杵とを具備する回転式粉末圧縮成形装置において、前記粉末供給部は、前記原料粉末を供給する原料粉末供給部と、前記滑沢剤を供給する滑沢剤供給部と、前記原料粉末供給部と前記滑沢剤供給部より下方に設けられ、前記原料粉末供給部から供給された前記原料粉末と、前記滑沢剤供給部から供給された前記滑沢剤とを撹拌混合して前記混合粉末を形成する撹拌混合機構を有する混合部と、前記混合部の下方に設けられ、前記混合部で形成された前記混合粉末を前記臼孔に導入する導入部とを備え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 along the vertical direction and a rotary disk that is rotationally driven at predetermined rotational direction intervals. Insert the mixed powder of the raw material powder and the lubricant at a predetermined position in the rotation direction of the rotating disk with the plurality of ulcers formed, and the powder supply unit that supplies the mixed powder to the ulcer from the direction opposite to the ulcer. In a rotary powder compression molding apparatus including a pair of knives for compression molding the mixed powder supplied to the mill hole, the powder supply unit includes a raw material powder supply unit for supplying the raw material powder and the raw material powder supply unit. The lubricant supply unit that supplies the lubricant, the raw material powder provided below the raw material powder supply unit and the lubricant supply unit, and the raw material powder supplied from the raw material powder supply unit, and the lubricant supply unit. A mixing section having a stirring and mixing mechanism for stirring and mixing the lubricant supplied from the section to form the mixed powder, and the mixed powder provided below the mixing section and formed by the mixing section. It is characterized by including an introduction portion to be introduced into the mill hole.

この構成によれば、従来の混合工程と輸送工程を省略することができ、滑沢剤の混合は粉末供給部内のみに限定されるので、過混合が起こりにくくなる。更に、粉末積層圧がかかりにくいため過混合が起きにくくなる。また、滑沢剤は滑沢剤供給部より定量的に混合部へ供給することが可能なので、外部滑沢技術のような滑沢剤の噴霧に伴う飛散を抑止することができ、圧縮成形体の滑沢剤含有量を明確にすることができる。すなわち、本願発明に係る回転式粉末圧縮成形装置によれば、外部滑沢技術で生じるような弊害を起こすことなく、圧縮成形される粉末に対する滑沢剤の過混合状態を抑制することが可能である。 According to this configuration, the conventional mixing step and the transportation step can be omitted, and the mixing of the lubricant is limited to the inside of the powder supply section, so that overmixing is less likely to occur. Further, since the powder stacking pressure is less likely to be applied, overmixing is less likely to occur. Further, since the lubricant can be quantitatively supplied from the lubricant supply section to the mixing section, it is possible to suppress the scattering of the lubricant due to the spraying of the lubricant as in the external lubricant technique, and the compression molded product. Lubricant content can be clarified. That is, according to the rotary powder compression molding apparatus according to the present invention, it is possible to suppress the overmixed state of the lubricant with the powder to be compression molded without causing the harmful effects caused by the external lubricant technique. be.

上記の構成において、前記混合部の前記撹拌混合機構が、前記原料粉末と前記滑沢剤とを撹拌混合する撹拌羽根を有していてもよい。 In the above configuration, the stirring and mixing mechanism of the mixing unit may have a stirring blade for stirring and mixing the raw material powder and the lubricant.

この構成であれば、撹拌混合機構による混合を容易に制御することができる。 With this configuration, mixing by the stirring and mixing mechanism can be easily controlled.

上記の構成において、前記導入部に、前記混合粉末を撹拌混合する撹拌羽根が配設されていてもよい。 In the above configuration, the introduction portion may be provided with a stirring blade for stirring and mixing the mixed powder.

この構成であれば、原料粉末と滑沢剤の混合を更に行なうことができる。また、混合粉末を容易に臼穴に導入することができる。 With this configuration, the raw material powder and the lubricant can be further mixed. In addition, the mixed powder can be easily introduced into the mortar hole.

上記の構成において、前記原料粉末供給部から供給された前記原料粉末と、前記滑沢剤供給部から供給された前記滑沢剤とが共に落下する空間部が設けられていてもよい。 In the above configuration, a space portion may be provided in which the raw material powder supplied from the raw material powder supply unit and the lubricant supplied from the lubricant supply unit both fall.

この構成であれば、原料粉末と滑沢剤の落下中に、原料粉末と滑沢剤が、自然にある程度混合される。従って、落下していない(充填された)原料粉末と滑沢剤を混合部で混合する場合より、混合の効率を向上させることができる。 With this configuration, the raw powder and the lubricant are naturally mixed to some extent during the fall of the raw powder and the lubricant. Therefore, the efficiency of mixing can be improved as compared with the case where the raw material powder that has not fallen (filled) and the lubricant are mixed in the mixing section.

上記の構成において、前記混合部の上部と下部の少なくとも一方に、前記原料粉末と前記滑沢剤の流通量を調節可能なバルブが配設されていてもよい。 In the above configuration, a valve capable of adjusting the flow amount of the raw material powder and the lubricant may be arranged at least one of the upper part and the lower part of the mixing portion.

この構成であれば、バルブにより、混合部に存在する原料粉末と滑沢剤の量や、原料粉末と滑沢剤の混合部での滞在時間を調節することが可能になる。これにより、混合部での原料粉末と滑沢剤の混合度を調節することが可能になる。 With this configuration, the valve makes it possible to adjust the amount of the raw material powder and the lubricant present in the mixing portion and the staying time in the mixing portion of the raw material powder and the lubricant. This makes it possible to adjust the mixing degree of the raw material powder and the lubricant in the mixing section.

上記の構成において、前記混合部に、前記混合粉末の混合度を検知可能なセンサが設けられていてもよい。 In the above configuration, the mixing unit may be provided with a sensor capable of detecting the mixing degree of the mixed powder.

この構成であれば、センサで検知された混合度に基づいて、混合度を制御することが可能である。 With this configuration, it is possible to control the mixing degree based on the mixing degree detected by the sensor.

本発明によれば、回転式粉末圧縮成形装置において、外部滑沢技術で生じるような弊害を起こすことなく、圧縮成形される粉末に対する滑沢剤の過混合状態を抑制することができる。また、圧縮成形される粉末に対する滑沢剤の過混合状態を抑制することができるので、圧縮成形体の硬度を安定化することや、圧縮成形体の崩壊性の変化を抑制することができる。また、従来の混合工程を省略することができるので、圧縮成形体の製造プロセスの短縮化が可能である。 According to the present invention, in the rotary powder compression molding apparatus, it is possible to suppress the overmixed state of the lubricant with the powder to be compression molded without causing the harmful effects caused by the external lubricant technique. Further, since the overmixed state of the lubricant with the powder to be compression-molded can be suppressed, the hardness of the compression-molded body can be stabilized and the change in the disintegration property of the compression-molded body can be suppressed. Further, since the conventional mixing step can be omitted, the manufacturing process of the compression molded product can be shortened.

本発明の第1実施形態に係る回転式粉末圧縮成形装置を示す概略部分側面図である。It is a schematic partial side view which shows the rotary powder compression molding apparatus which concerns on 1st Embodiment of this invention. 本発明の第1実施形態に係る回転式粉末圧縮成形装置の粉末供給部を示す正面側の概略斜視図である。It is a schematic perspective view of the front side which shows the powder supply part of the rotary powder compression molding apparatus which concerns on 1st Embodiment of this invention. 本発明の第2実施形態に係る回転式粉末圧縮成形装置の粉末供給部を示す正面側の概略斜視図である。It is a schematic perspective view of the front side which shows the powder supply part of the rotary powder compression molding apparatus which concerns on 2nd Embodiment of this invention. 本発明の第3実施形態に係る回転式粉末圧縮成形装置の粉末供給部を示す正面側の概略斜視図である。It is a schematic perspective view of the front side which shows the powder supply part of the rotary powder compression molding apparatus which concerns on 3rd Embodiment of this invention. 本発明の第4実施形態に係る回転式粉末圧縮成形装置の粉末供給部を示す正面側の概略斜視図である。It is a schematic perspective view of the front side which shows the powder supply part of the rotary powder compression molding apparatus which concerns on 4th Embodiment of this invention. 本発明の変形例に係る回転式粉末圧縮成形装置の粉末供給部を示す正面側の概略斜視図である。It is a schematic perspective view of the front side which shows the powder supply part of the rotary powder compression molding apparatus which concerns on the modification of this invention.

図1は、本発明の第1実施形態に係る回転式粉末圧縮成形装置を示す概略部分側面図である。図2は、本発明の第1実施形態に係る回転式粉末圧縮成形装置の粉末供給部を示す正面側の概略斜視図である。この回転式粉末圧縮成形装置1は、原料粉末と滑沢剤の混合粉末に対して圧縮成形を行なうことにより、例えば医薬品の錠剤等の圧縮成形体を製造する打錠機等である。滑沢剤と混合される原料粉末としては、例えば医薬品の錠剤を製造する場合、主薬(主剤、有効成分)、添加剤(賦形剤、結合剤等)が挙げられる。 FIG. 1 is a schematic partial side view showing a rotary powder compression molding apparatus according to the first embodiment of the present invention. FIG. 2 is a schematic perspective view of the front side showing a powder supply unit of the rotary powder compression molding apparatus according to the first embodiment of the present invention. The rotary powder compression molding apparatus 1 is a tablet press or the like for producing a compression molded body such as a pharmaceutical tablet by performing compression molding on a mixed powder of a raw material powder and a lubricant. Examples of the raw material powder to be mixed with the lubricant include a main agent (main agent, active ingredient) and an additive (excipient, binder, etc.) in the case of producing a tablet of a pharmaceutical product.

回転式粉末圧縮成形装置1は、回転盤2と、臼孔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、上下方向に沿った回転中心軸線の周りに不図示の駆動源によって回転駆動される。臼孔3は、回転盤2に所定の回転方向間隔で複数設けられている。臼孔3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、原料粉末と滑沢剤の混合粉末を臼孔3に供給する。上杵5と下杵6は、臼孔3に相反する方向から挿入され、臼孔3に供給された混合粉末を圧縮成形する。 The rotary powder compression molding apparatus 1 includes a rotary disk 2, a mortar hole 3, a powder supply unit 4, and a pair of pestle (upper pestle 5, lower pestle 6). The turntable 2 is rotationally driven by a drive source (not shown) around a rotation center axis along the vertical direction. A plurality of mortar holes 3 are provided in the turntable 2 at predetermined rotation direction intervals. The mortar hole 3 has a central axis along the vertical direction and penetrates the turntable 2. The powder supply unit 4 supplies the mixed powder of the raw material powder and the lubricant to the mortar hole 3 at a predetermined position in the rotation direction of the turntable 2. The upper pestle 5 and the lower pestle 6 are inserted into the mortar holes 3 from opposite directions, and the mixed powder supplied to the mortar holes 3 is compression-molded.

粉末供給部4は、設置台T上に設置されている。粉末供給部4は、ホッパ部7(原料粉末供給部)と、滑沢剤供給管8(滑沢剤供給部)と、本体部9と、導入部10とを備える。 The powder supply unit 4 is installed on the installation table T. The powder supply unit 4 includes a hopper unit 7 (raw material powder supply unit), a lubricant supply pipe 8 (glidant supply unit), a main body unit 9, and an introduction unit 10.

ホッパ部7は、上下方向に沿って中心軸線が延びている管状体であり、下方に向かって漸次縮径している。滑沢剤供給管8は、横方向に沿って中心軸線が延びている管状体であり、径は均一である。本体部9は、上下方向に沿って中心軸線が延びている管状体であり、径は均一である。導入部10は、本体部9の下方に設けられた中空体であり、図示例では、外観形状が円盤状となっている。 The hopper portion 7 is a tubular body having a central axis extending in the vertical direction, and the diameter is gradually reduced downward. The lubricant supply pipe 8 is a tubular body having a central axis extending along the lateral direction, and has a uniform diameter. The main body 9 is a tubular body having a central axis extending in the vertical direction, and has a uniform diameter. The introduction portion 10 is a hollow body provided below the main body portion 9, and in the illustrated example, the external shape is a disk shape.

ホッパ部7の下端が、本体部9の上端に接続している。本体部9の外周部の上部に、滑沢剤供給管8の一端が接続している。本体部9の下端が、導入部10の上端の一部に接続している。 The lower end of the hopper portion 7 is connected to the upper end of the main body portion 9. One end of the lubricant supply pipe 8 is connected to the upper part of the outer peripheral portion of the main body portion 9. The lower end of the main body 9 is connected to a part of the upper end of the introduction portion 10.

ホッパ部7は、本体部9との接続部に形成された原料粉供給口7aを介して、本体部9に原料粉末を供給する。滑沢剤供給管8は、本体部9との接続部に形成された滑沢剤供給口8aを介して、本体部9に滑沢剤を供給する。 The hopper portion 7 supplies the raw material powder to the main body portion 9 via the raw material powder supply port 7a formed at the connection portion with the main body portion 9. The lubricant supply pipe 8 supplies the lubricant to the main body 9 via the lubricant supply port 8a formed at the connection portion with the main body 9.

本体部9において、原料粉供給口7aと滑沢剤供給口8aの下方には、ホッパ部7から供給された原料粉末と、滑沢剤供給管8から供給された滑沢剤とを撹拌混合して混合粉末を形成する第1撹拌羽根11(撹拌混合機構)が配設されている。第1撹拌羽根11は上下方向に沿った回転軸線の周りに回転する。本体部9における第1撹拌羽根11が配設されている部位が混合部12を構成する。混合部12は、ホッパ部7と滑沢剤供給管8の下方に設けられている。 In the main body 9, below the raw material powder supply port 7a and the lubricant supply port 8a, the raw material powder supplied from the hopper portion 7 and the lubricant supplied from the lubricant supply pipe 8 are stirred and mixed. A first stirring blade 11 (stirring and mixing mechanism) for forming the mixed powder is provided. The first stirring blade 11 rotates around a rotation axis along the vertical direction. The portion of the main body 9 where the first stirring blade 11 is arranged constitutes the mixing portion 12. The mixing section 12 is provided below the hopper section 7 and the lubricant supply pipe 8.

導入部10は、本体部9(混合部12)の下方に設けられている。導入部10には、本体部9との接続部に形成された接続口9aを介して、混合部12で形成された混合粉末が供給される。この供給された混合粉末は、導入部10の下部に設けられた導入口10aまで移動し、この導入口10aから、下方に位置する臼孔3に供給(導入)される。 The introduction portion 10 is provided below the main body portion 9 (mixing portion 12). The mixed powder formed in the mixing portion 12 is supplied to the introduction portion 10 via the connection port 9a formed in the connection portion with the main body portion 9. The supplied mixed powder moves to the introduction port 10a provided at the lower part of the introduction portion 10, and is supplied (introduced) from the introduction port 10a to the mortar hole 3 located below.

導入部10には、供給された混合粉末を撹拌混合する第2撹拌羽根13が複数(図示例では2つ)配設されている。また、この第2撹拌羽根13は、供給された混合粉末の導入口までの移動を促進する。第2撹拌羽根13も、上下方向に沿った回転軸線の周りに回転する。 A plurality of (two in the illustrated example) second stirring blades 13 for stirring and mixing the supplied mixed powder are arranged in the introduction unit 10. Further, the second stirring blade 13 promotes the movement of the supplied mixed powder to the introduction port. The second stirring blade 13 also rotates around a rotation axis along the vertical direction.

なお、回転式粉末圧縮成形装置1の稼働中は、ホッパ部7内には、原料粉末が常に所定量存在するようになっており、粉面Pがホッパ部7内に存在する。また、滑沢剤供給管8内には滑沢剤が常に充填されるようになっている。従って、本体部9内や導入部10内も、原料粉末、滑沢剤、それらの混合粉末がある程度充填された状態となっている。ホッパ部7への原料粉末の供給方法としては、例えば、ホッパ部7上に原料粉末を収容したコンテナを載置し、このコンテナから原料粉末を常に供給する方法、原料粉末供給経路からロータリバルブ等の定量供給機構を介して原料粉末を定量的に供給して粉面Pのレベルを一定に保つ方法等が挙げられる。 While the rotary powder compression molding apparatus 1 is in operation, a predetermined amount of raw material powder is always present in the hopper portion 7, and the powder surface P is present in the hopper portion 7. Further, the lubricant supply pipe 8 is always filled with the lubricant. Therefore, the main body 9 and the introduction 10 are also filled with the raw material powder, the lubricant, and the mixed powder thereof to some extent. As a method of supplying the raw material powder to the hopper portion 7, for example, a method of placing a container containing the raw material powder on the hopper portion 7 and constantly supplying the raw material powder from this container, a rotary valve from the raw material powder supply path, or the like. A method of quantitatively supplying the raw material powder through the quantitative supply mechanism of the above to keep the level of the powder surface P constant can be mentioned.

以上のように構成された回転式粉末圧縮成形装置1によれば、以下の効果を享受できる。 According to the rotary powder compression molding apparatus 1 configured as described above, the following effects can be enjoyed.

従来の混合工程と輸送工程を省略することができ、滑沢剤の混合は粉末供給部4内のみに限定されるので、過混合が起こりにくくなる。更に、粉末積層圧がかかりにくいため過混合が起きにくくなる。また、滑沢剤は滑沢剤供給管8より定量的に混合部12へ供給することが可能なので、外部滑沢技術のような滑沢剤の噴霧に伴う飛散を抑止することができ、圧縮成形体の滑沢剤含有量を明確にすることができる。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、外部滑沢技術で生じるような弊害を起こすことなく、圧縮成形される粉末に対する滑沢剤の過混合状態を抑制することが可能である。 Since the conventional mixing step and the transportation step can be omitted and the mixing of the lubricant is limited to the inside of the powder supply unit 4, overmixing is less likely to occur. Further, since the powder stacking pressure is less likely to be applied, overmixing is less likely to occur. Further, since the lubricant can be quantitatively supplied to the mixing unit 12 from the lubricant supply pipe 8, it is possible to suppress the scattering of the lubricant due to the spraying of the lubricant as in the external lubricant technique, and it is compressed. The lubricant content of the molded body can be clarified. That is, according to the rotary powder compression molding apparatus 1 according to the present embodiment, it is possible to suppress the overmixed state of the lubricant with the powder to be compression molded without causing the harmful effects caused by the external lubricant technique. It is possible.

次に、図3を参照して第2実施形態について説明する。 Next, the second embodiment will be described with reference to FIG.

第2実施形態では、第1実施形態のホッパ部7が存在せず、本体部9の上端の位置は第1実施形態の本体部9と比較して高くなっている。そして、本体部9の上端開口部9bには、ロータリバルブ等の定量供給機構14が配設されている。不図示の原料粉末供給経路から定量供給機構14を介して原料粉末が定量的に本体部9内に供給される。 In the second embodiment, the hopper portion 7 of the first embodiment does not exist, and the position of the upper end of the main body portion 9 is higher than that of the main body portion 9 of the first embodiment. A fixed quantity supply mechanism 14 such as a rotary valve is provided at the upper end opening 9b of the main body 9. The raw material powder is quantitatively supplied into the main body 9 from a raw material powder supply path (not shown) via the quantitative supply mechanism 14.

また、滑沢剤供給管8は、本体部9の外周部の上下方向中央よりやや上部に接続されている。滑沢剤供給口8aは、第1実施形態と比較して上方に形成されている。滑沢剤供給口8aから滑沢剤が本体部9内に定量的に供給されるように、滑沢剤供給管8内を滑沢剤が移送される。 Further, the lubricant supply pipe 8 is connected slightly above the center of the outer peripheral portion of the main body portion 9 in the vertical direction. The lubricant supply port 8a is formed upward as compared with the first embodiment. The lubricant is transferred into the lubricant supply pipe 8 so that the lubricant is quantitatively supplied into the main body 9 from the lubricant supply port 8a.

第2実施形態では、粉面Pの上下方向位置が、滑沢剤供給口8aの上下方向位置と、第1撹拌羽根11の上下方向位置との間にある。定量供給機構14から供給された原料粉末は、本体部9内を粉面Pまで落下する。そして、滑沢剤供給口8aから供給された滑沢剤は、本体部9内を粉面Pまで落下する。従って、本体部9内で、滑沢剤供給口8aの上下方向位置と粉面Pの上下方向位置の間では、原料粉末と滑沢剤とが共に落下する。換言すれば、本体部9内に、原料粉末と滑沢剤とが共に落下する空間部Fが設けられている。 In the second embodiment, the vertical position of the powder surface P is between the vertical position of the lubricant supply port 8a and the vertical position of the first stirring blade 11. The raw material powder supplied from the fixed quantity supply mechanism 14 falls in the main body 9 to the powder surface P. Then, the lubricant supplied from the lubricant supply port 8a falls inside the main body 9 to the powder surface P. Therefore, in the main body 9, the raw powder and the lubricant fall together between the vertical position of the lubricant supply port 8a and the vertical position of the powder surface P. In other words, a space portion F in which the raw material powder and the lubricant fall together is provided in the main body portion 9.

なお、第2実施形態では、本体部9における滑沢剤供給口8aの上端より上方の部位を、原料粉末供給部とし、本体部9における滑沢剤供給口8aの上端の上下方向位置の内部を原料粉末供給口とする。混合部12は、この原料粉末供給部と滑沢剤供給管8の下方に設けられている。その他の構成は、第1実施形態と同様なので、同一の構成には、同一の符号を付し、説明を省略する。 In the second embodiment, the portion above the upper end of the lubricant supply port 8a in the main body 9 is the raw material powder supply portion, and the inside of the upper end of the lubricant supply port 8a in the main body 9 is positioned in the vertical direction. Is used as a raw material powder supply port. The mixing unit 12 is provided below the raw material powder supply unit and the lubricant supply pipe 8. Since other configurations are the same as those of the first embodiment, the same configurations are designated by the same reference numerals and the description thereof will be omitted.

次に、図4を参照して第3実施形態について説明する。 Next, the third embodiment will be described with reference to FIG.

第3実施形態が、第2実施形態と異なる点は、粉面Pの上下方向位置が、第1撹拌羽根11の上下方向位置と接続口9aの上下方向位置との間にある。従って、第1撹拌羽根11は、落下中の原料粉末と滑沢剤を撹拌混合する。第3実施形態でも、本体部9内で、滑沢剤供給口8aの上下方向位置と粉面Pの上下方向位置の間では、原料粉末と滑沢剤とが共に落下する。換言すれば、本体部9内に、原料粉末と滑沢剤とが共に落下する空間部Fが設けられている。その他の構成は、第2実施形態と同様なので、同一の構成には、同一の符号を付し、説明を省略する。 The third embodiment differs from the second embodiment in that the vertical position of the powder surface P is between the vertical position of the first stirring blade 11 and the vertical position of the connection port 9a. Therefore, the first stirring blade 11 stirs and mixes the falling raw material powder and the lubricant. Also in the third embodiment, the raw material powder and the lubricant fall together in the main body 9 between the vertical position of the lubricant supply port 8a and the vertical position of the powder surface P. In other words, a space portion F in which the raw material powder and the lubricant fall together is provided in the main body portion 9. Since other configurations are the same as those of the second embodiment, the same configurations are designated by the same reference numerals and the description thereof will be omitted.

次に、図5を参照して第4実施形態について説明する。 Next, the fourth embodiment will be described with reference to FIG.

第4実施形態では、本体部9の上端部9cに、中心軸線が上下方向に対して(図で左側に)少し傾斜した原料粉末供給管15(原料粉末供給部)が接続されている。原料粉末供給管15の上端開口部15aに、定量供給機構14が配設されている。原料粉末供給管15は、下方に向かって漸次縮径している。不図示の原料粉末供給経路から定量供給機構14を介して原料粉末が定量的に原料粉末供給管15内に供給される。本体部9の上端部9cと原料粉末供給管15との接続部には、原料粉末供給管15から本体部9内に原料粉末を供給する供給口15bが形成されている。 In the fourth embodiment, the raw material powder supply pipe 15 (raw material powder supply unit) whose central axis is slightly inclined in the vertical direction (on the left side in the figure) is connected to the upper end portion 9c of the main body portion 9. A fixed quantity supply mechanism 14 is arranged at the upper end opening 15a of the raw material powder supply pipe 15. The diameter of the raw material powder supply pipe 15 is gradually reduced downward. The raw material powder is quantitatively supplied into the raw material powder supply pipe 15 from a raw material powder supply path (not shown) via the quantitative supply mechanism 14. At the connection portion between the upper end portion 9c of the main body portion 9 and the raw material powder supply pipe 15, a supply port 15b for supplying the raw material powder from the raw material powder supply pipe 15 into the main body portion 9 is formed.

また、本体部9の上端部9cには、中心軸線が上下方向に対して(図で右側に)少し傾斜した滑沢剤供給管8が接続されている。滑沢剤供給口8aから滑沢剤が本体部9内に定量的に供給されるように、滑沢剤供給管8内に滑沢剤が供給される。混合部12は、原料粉末供給管15と滑沢剤供給管8の下方に設けられている。なお、本体部9の上端部9cは、原料粉末供給管15と滑沢剤供給管8が接続されている部分以外は、閉塞されている。 Further, a lubricant supply pipe 8 whose central axis is slightly inclined in the vertical direction (to the right in the figure) is connected to the upper end portion 9c of the main body portion 9. The lubricant is supplied into the lubricant supply pipe 8 so that the lubricant is quantitatively supplied into the main body 9 from the lubricant supply port 8a. The mixing unit 12 is provided below the raw material powder supply pipe 15 and the lubricant supply pipe 8. The upper end portion 9c of the main body portion 9 is closed except for the portion where the raw material powder supply pipe 15 and the lubricant supply pipe 8 are connected.

第4実施形態では、粉面Pの上下方向位置は、本体部9の上端部9cの上下方向位置と、第1撹拌羽根11の上下方向位置の間にある。定量供給機構14から供給された原料粉末は、原料粉末供給管15、原料粉末供給口15b、本体部9を経由して粉面Pまで落下する。そして、滑沢剤供給口8aから供給された滑沢剤は、本体部9内を粉面Pまで落下する。従って、本体部9内では、原料粉末と滑沢剤とが共に落下する。換言すれば、本体部9内に、原料粉末と滑沢剤とが共に落下する空間部Fが設けられている。 In the fourth embodiment, the vertical position of the powder surface P is between the vertical position of the upper end portion 9c of the main body portion 9 and the vertical position of the first stirring blade 11. The raw material powder supplied from the fixed quantity supply mechanism 14 falls to the powder surface P via the raw material powder supply pipe 15, the raw material powder supply port 15b, and the main body 9. Then, the lubricant supplied from the lubricant supply port 8a falls inside the main body 9 to the powder surface P. Therefore, both the raw material powder and the lubricant fall in the main body 9. In other words, a space portion F in which the raw material powder and the lubricant fall together is provided in the main body portion 9.

その他の構成は、第2実施形態と同様なので、同一の構成には、同一の符号を付し、説明を省略する。 Since other configurations are the same as those of the second embodiment, the same configurations are designated by the same reference numerals and the description thereof will be omitted.

本発明は、上記実施形態に限定されるものでは無く、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、図6に示すように、混合部12の上部と下部の少なくとも一方(図示例は両方)に、原料粉末と滑沢剤の流通量を調節可能なバルブVが配設されていてもよい。また、図6に示すように、混合部12に、混合粉末の混合度を検知可能なセンサS(例えばNIR等)が設けられていてもよい。 The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the technical idea thereof. For example, as shown in FIG. 6, at least one of the upper part and the lower part (both in the illustrated example) of the mixing unit 12 may be provided with a valve V capable of adjusting the flow amount of the raw material powder and the lubricant. .. Further, as shown in FIG. 6, the mixing unit 12 may be provided with a sensor S (for example, NIR or the like) capable of detecting the mixing degree of the mixed powder.

また、上記実施形態では、導入部10に第2撹拌羽根13が2つ配設されていたが、第2撹拌羽根13は配設されていなくてもよく、また、第2撹拌羽根13は3つ以上配設されていてもよい。 Further, in the above embodiment, two second stirring blades 13 are arranged in the introduction portion 10, but the second stirring blade 13 may not be arranged, and the second stirring blade 13 may be 3 One or more may be arranged.

1 回転式粉末圧縮成形装置
2 回転盤
3 臼孔
4 粉末供給部
5 上杵
6 下杵
7 ホッパ部(原料粉供給部)
8 滑沢剤供給管(滑沢剤供給部)
9 本体部
10 導入部
11 第1撹拌羽根
12 混合部
13 第2撹拌羽根
14 定量供給機構
15 原料粉末供給管(原料粉供給部)
F 空間部
S センサ
V バルブ
1 Rotary powder compression molding device 2 Rotating disk 3 Miller hole 4 Powder supply part 5 Upper pestle 6 Lower pestle 7 Hopper part (raw material powder supply part)
8 Glidant supply pipe (Glidant supply section)
9 Main body 10 Introducing part 11 1st stirring blade 12 Mixing part 13 2nd stirring blade 14 Quantitative supply mechanism 15 Raw material powder supply pipe (raw material powder supply part)
F Space S Sensor V Valve

Claims (6)

上下方向に沿った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、前記回転盤の回転方向の所定位置で、原料粉末と滑沢剤との混合粉末を前記臼孔に供給する粉末供給部と、前記臼孔に相反する方向から挿入され、前記臼孔に供給された前記混合粉末を圧縮成形する一対の杵とを具備する回転式粉末圧縮成形装置において、
前記粉末供給部は、
前記原料粉末を供給する原料粉末供給部と、
前記滑沢剤を供給する滑沢剤供給部と、
前記原料粉末供給部と前記滑沢剤供給部より下方に設けられ、前記原料粉末供給部から供給された前記原料粉末と、前記滑沢剤供給部から供給された前記滑沢剤とを撹拌混合して前記混合粉末を形成する撹拌混合機構を有する混合部と、
前記混合部の下方に設けられ、前記混合部で形成された前記混合粉末を前記臼孔に導入する導入部とを備え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 along the vertical direction, a plurality of mortar holes provided in the rotary disk at predetermined rotational direction intervals, and raw material powder at a predetermined position in the rotational direction of the rotary disk. It is provided with a powder supply unit that supplies a mixed powder with a lubricant to the mortar, and a pair of pestle that is inserted from a direction opposite to the mortar and compression-molds the mixed powder that is inserted into the mortar and supplied to the mortar. In a rotary powder compression molding device
The powder supply unit is
The raw material powder supply unit that supplies the raw material powder and
The lubricant supply unit that supplies the lubricant and
The raw material powder provided below the raw material powder supply unit and the lubricant supply unit and supplied from the raw material powder supply unit and the lubricant supplied from the lubricant supply unit are stirred and mixed. With a mixing unit having a stirring and mixing mechanism for forming the mixed powder,
A rotary powder compression molding apparatus provided below the mixing portion and provided with an introduction portion for introducing the mixed powder formed in the mixing portion into the mortar.
前記混合部の前記撹拌混合機構が、前記原料粉末と前記滑沢剤とを撹拌混合する撹拌羽根を有す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 stirring and mixing mechanism of the mixing unit has a stirring blade for stirring and mixing the raw material powder and the lubricant. 前記導入部に、前記混合粉末を撹拌混合する撹拌羽根が配設されていることを特徴とする請求項1又は2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 or 2, wherein a stirring blade for stirring and mixing the mixed powder is provided in the introduction portion. 前記原料粉末供給部から供給された前記原料粉末と、前記滑沢剤供給部から供給された前記滑沢剤とが共に落下する空間部が設けられていることを特徴とする請求項1~3の何れか1項に記載の回転式粉末圧縮成形装置。 Claims 1 to 3 are provided with a space portion in which the raw material powder supplied from the raw material powder supply unit and the lubricant supplied from the lubricant supply unit fall together. The rotary powder compression molding apparatus according to any one of the above items. 前記混合部の上部と下部の少なくとも一方に、前記原料粉末と前記滑沢剤の流通量を調節可能なバルブが配設されたことを特徴とする請求項1~4の何れか1項に記載の回転式粉末圧縮成形装置。 The invention according to any one of claims 1 to 4, wherein a valve capable of adjusting the flow amount of the raw material powder and the lubricant is provided at least one of the upper part and the lower part of the mixing portion. Rotary powder compression molding equipment. 前記混合部に、前記混合粉末の混合度を検知可能なセンサが設けられたことを特徴とする請求項1~5の何れか1項に記載の回転式粉末圧縮成形装置。 The rotary powder compression molding apparatus according to any one of claims 1 to 5, wherein the mixing unit is provided with a sensor capable of detecting the mixing degree of the mixed powder.
JP2020176111A 2020-10-20 2020-10-20 Rotary powder compression molding equipment Active JP7471647B2 (en)

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