JP4042651B2 - Tablet manufacturing equipment - Google Patents

Tablet manufacturing equipment Download PDF

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JP4042651B2
JP4042651B2 JP2003279233A JP2003279233A JP4042651B2 JP 4042651 B2 JP4042651 B2 JP 4042651B2 JP 2003279233 A JP2003279233 A JP 2003279233A JP 2003279233 A JP2003279233 A JP 2003279233A JP 4042651 B2 JP4042651 B2 JP 4042651B2
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tablet
pressing body
molding material
molding
mold
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JP2005041160A (en
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義智 上野
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Denso Corp
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Denso Corp
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本発明は、製品成形前の加熱を無くすことができるタブレット製造装置に関する。   The present invention relates to a tablet manufacturing apparatus that can eliminate heating before product molding.

従来のタブレット製造装置は、少なくとも、タブレットの形状に凹部が形成された下型Aと、その凹部に投入した樹脂粒体(又は粉体)を圧縮してタブレットを形成する上型Bとからなる型部で構成されている。
この場合、樹脂粒体(又は粉体)の圧縮成形においては、従来、図3に示されるように、まず型部をわずかに開き加減にして樹脂粒体間のガス抜きを行いながら仮圧縮(粉体成形)を行いタブレットを仮成形する。この仮成形したタブレットを型部から取り出して加熱炉等によってタブレットを加熱する。加熱後、タブレットを再度型部に入れ、型部を完全に閉じて所定の圧力で再度の圧縮成形(製品成形)を行い、最終製品としている。
A conventional tablet manufacturing apparatus includes at least a lower mold A in which a recess is formed in the shape of a tablet, and an upper mold B that forms a tablet by compressing resin particles (or powder) charged in the recess. It consists of a mold part.
In this case, in the compression molding of the resin particles (or powder), as shown in FIG. 3, conventionally, first, the mold part is slightly opened and subtracted, and the temporary compression ( Powder molding is performed to temporarily mold the tablet. The temporarily formed tablet is taken out from the mold part and heated with a heating furnace or the like. After heating, the tablet is put into the mold part again, the mold part is completely closed, and compression molding (product molding) is performed again at a predetermined pressure to obtain a final product.

または、仮圧縮(粉体成形)したタブレットを取り出さないで、その状態のまま型部に埋め込んだヒータにより、タブレットを加熱して、加熱後に型部を完全に閉じて所定の圧力で再度の圧縮成形(製品成形)を行い、最終製品としている。   Or, do not take out the temporarily compressed (powder-molded) tablet, heat the tablet with the heater embedded in the mold as it is, completely close the mold after heating, and compress it again at the specified pressure Molding (product molding) is done to make the final product.

しかしながら、この従来のタブレットの製造においては、製品成形前のタブレットの加熱において、タブレットの表面と内部とで温度差が発生するため、タブレットの加熱に時間がかかるという問題があった。
また、タブレットの製造時に、低温加熱と上型による加圧で樹脂粒体間を密着させ、樹脂粒体間のガスを排除しているため、ガスを完全に排除することができず、製品成形時に残留ガスの抜けにより局所的に温度が上がって変色するガス焼けを起こすという問題があった。
However, in this conventional tablet production, there is a problem that it takes time to heat the tablet because a temperature difference is generated between the surface and the inside of the tablet in heating the tablet before product molding.
Also, during tablet production, the resin particles are brought into close contact with each other by low-temperature heating and pressurization with the upper mold, and the gas between the resin particles is excluded. There is a problem in that gas burns that sometimes cause discoloration due to local rise in temperature due to escape of residual gas.

本発明は、上記問題に鑑みてなされたものであり、その目的は、製品成形前の加熱を廃止でき、タブレット内のガスを完全に除去可能なタブレット製造装置を提供することである。   This invention is made | formed in view of the said problem, The objective is to provide the tablet manufacturing apparatus which can abolish the heating before product shaping | molding and can remove the gas in a tablet completely.

本発明は、前記課題を解決するための手段として、特許請求の範囲の各請求項に記載のタブレット製造装置を提供する。
請求項1に記載のタブレット製造装置は、タブレットを成形する型部に成形材を注入する樹脂供給部がスクリュー射出成形機で、型部が、円筒体と、該円筒体と共に成形材が注入される空間を形成し、成形材を上から加圧する上押圧体と、成形材を下から加圧する下押圧体とからなり、スクリュー射出成形機から空間内に成形材を注入する注入口が、円筒体の側面に穿設されていて、所定量の成形材が空間内に供給されたら、上押圧体の下端部が注入口よりも下方にまで降下して、注入口を塞ぐと共に、上押圧体と下押圧体とで空間内に充填された成形材を押圧成形するようにしたものであり、これにより、成形樹脂はスクリュー射出成形機内でスクリューにより内部まで高速に均等に加熱され、上押圧体と下押圧体とで押圧されてタブレットを所定の形状にすることにより、タブレットの内部まで均一で一定の温度に加熱され、高精度に計量されたタブレットを製造することができる。また、成形材の注入口を成形位置よりも上方に設け、上押圧体と下押圧体とでタブレットを押圧するとき、上押圧体で注入口を塞ぐようにしているので、成形材が樹脂供給部に逆流すること無く、タブレットの計量精度が良くなる。
This invention provides the tablet manufacturing apparatus as described in each claim of a claim as a means for solving the said subject.
In the tablet manufacturing apparatus according to claim 1, the resin supply unit that injects the molding material into the mold part for molding the tablet is a screw injection molding machine, the mold part is a cylindrical body, and the molding material is injected together with the cylindrical body. that space is formed, and on the pressing member for pressing from above the molding material, Ri Do and a lower pressing member for pressing the molding material from the lower injection port for injecting a molding material into the space from the screw injection molding machine, When a predetermined amount of molding material is supplied into the space, the lower end of the upper pressing body descends below the injection port to close the injection port and and the body and the lower pressing member and the molded material filled in the space obtained by the so that to press forming, by which, the molding resin is uniformly heated at a high speed to the inside by the screw in a screw injection molding machine, the upper The tablet is pressed by the pressing body and the lower pressing body. The by a predetermined shape, is heated to a constant temperature with uniform up to the inside of the tablet, it can be produced tablets are weighed on precision. Also, the injection port for the molding material is provided above the molding position, and when the tablet is pressed with the upper pressing body and the lower pressing body, the injection port is closed with the upper pressing body, so the molding material is supplied with resin. The weighing accuracy of the tablet is improved without flowing back to the part.

請求項2のタブレット製造装置は、タブレット、上押圧体及び下押圧体とをリング状にしたものであり、請求項3のタブレット製造装置は、上押圧体、下押圧体及びリング状タブレットとを内外径が等しい円筒形状にしたものである。これにより、タブレットを製造後、上押圧体で下押圧体ごとタブレットを型本体から押し出すことによりタブレットを容易に取り出すことができる。   The tablet manufacturing apparatus according to claim 2 is a ring-shaped tablet, upper pressing body, and lower pressing body, and the tablet manufacturing apparatus according to claim 3 includes an upper pressing body, a lower pressing body, and a ring tablet. It has a cylindrical shape with the same inner and outer diameters. Thereby, after manufacturing a tablet, a tablet can be easily taken out by extruding a tablet from a die body together with a lower pressing body with an upper pressing body.

以下、図面に従って本発明の実施の形態のタブレット製造装置について説明する。図1は、本発明のタブレット製造装置の全体構成を示す図である。タブレット製造装置1は、タブレット10を成形する型部2と、この型部2に成形材を注入する樹脂供給部3とから構成されている。これら型部2と樹脂供給部3とは機台に取り付けられている。   A tablet manufacturing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a tablet manufacturing apparatus according to the present invention. The tablet manufacturing apparatus 1 includes a mold unit 2 that molds the tablet 10 and a resin supply unit 3 that injects a molding material into the mold unit 2. The mold part 2 and the resin supply part 3 are attached to the machine base.

更に型部2は、ベースとなる型本体4と、成形材を上から加圧する上押圧体5と、成形材を下から加圧する下押圧体6及びこれら上押圧体5と下押圧体6の上部及び下部駆動機構50,60とからなる。型本体4は、外側の型となる円筒体41と、この円筒体41の中に同軸状に配置され、内側の型となる円柱体42とよりなり、これらは蓋体43により固定されている。円柱体42の外面と円筒体41の内面との間には、リング状の間隙が形成され、この間隙内に上押圧体5と下押圧体6とが摺動可能に収容される。間隙内の上押圧体5と下押圧体6との間には、成形材が注入される空間であるキャビティ44が形成される。即ち、キャビティ44は、円筒体41、円柱体42、上押圧体5及び下押圧体6の4者によって囲まれる空間として形成される。また、円筒体41の側面には、キャビティ44に通じ、成形材をキャビティ44内に注入する注入口41aが穿設されている。   Furthermore, the mold part 2 includes a mold main body 4 serving as a base, an upper pressing body 5 that pressurizes the molding material from above, a lower pressing body 6 that pressurizes the molding material from below, and the upper pressing body 5 and the lower pressing body 6. It consists of upper and lower drive mechanisms 50 and 60. The mold body 4 includes a cylindrical body 41 serving as an outer mold and a columnar body 42 disposed coaxially within the cylindrical body 41 and serving as an inner mold, which are fixed by a lid body 43. . A ring-shaped gap is formed between the outer surface of the columnar body 42 and the inner surface of the cylindrical body 41, and the upper pressing body 5 and the lower pressing body 6 are slidably accommodated in the gap. Between the upper pressing body 5 and the lower pressing body 6 in the gap, a cavity 44 that is a space into which a molding material is injected is formed. That is, the cavity 44 is formed as a space surrounded by the four members of the cylindrical body 41, the columnar body 42, the upper pressing body 5, and the lower pressing body 6. Further, an injection port 41 a that penetrates the cavity 44 and injects a molding material into the cavity 44 is formed in the side surface of the cylindrical body 41.

上押圧体5は、円筒形状をしていて、蓋体43を貫通する連結部材51によって上記駆動機構50に連結している。上部駆動機構50は、例えば流体圧で作動するシリンダ機構であり、これを作動することにより、上押圧体5は、円筒体41と円柱体42とで形成されるリング状の間隙内を上下に摺動する。   The upper pressing body 5 has a cylindrical shape and is connected to the drive mechanism 50 by a connecting member 51 that penetrates the lid body 43. The upper drive mechanism 50 is, for example, a cylinder mechanism that is operated by fluid pressure. By operating this, the upper pressing body 5 moves up and down in a ring-shaped gap formed by the cylindrical body 41 and the cylindrical body 42. Slide.

下押圧体6もまた、円筒形状をしており、下部駆動機構60の一部である円形部材61の上面に固着されている。この円形部材61は、その外径が円筒体41の外径と略同じであり、型本体4の下部の蓋の役割もしている。この下部駆動機構60も、例えばシリンダ機構であり、これを作動することにより、下押圧体6は、円筒体41と円柱体42とで形成されるリング状の間隙内を上下に摺動すると共に、この間隙内を出入する。したがって、上押圧体5と下押圧体6の円筒形状は、その内外径が同じである。即ち、この円筒形状は、その内径が円柱体42の外径と略同じで、その外径が円筒体41の内径と略同じである。
なお、円筒形状の下押圧体6を無くして、円形部材61のみで、蓋と下押圧体とを兼用させるようにしてもよい。
The lower pressing body 6 also has a cylindrical shape, and is fixed to the upper surface of a circular member 61 that is a part of the lower drive mechanism 60. The circular member 61 has an outer diameter that is substantially the same as the outer diameter of the cylindrical body 41, and also serves as a lid at the bottom of the mold body 4. The lower drive mechanism 60 is also a cylinder mechanism, for example. By operating the lower drive mechanism 60, the lower pressing body 6 slides up and down in a ring-shaped gap formed by the cylindrical body 41 and the columnar body 42. , Get in and out of this gap. Therefore, the inner and outer diameters of the cylindrical shapes of the upper pressing body 5 and the lower pressing body 6 are the same. That is, the cylindrical shape has an inner diameter that is substantially the same as the outer diameter of the columnar body 42, and an outer diameter that is substantially the same as the inner diameter of the cylindrical body 41.
Note that the cylindrical lower pressing body 6 may be eliminated, and only the circular member 61 may be used as the lid and the lower pressing body.

型本体4の注入口41aに臨むように樹脂供給部3が設けられている。この樹脂供給部3としてスクリュー射出成形機が使用される。スクリュー射出成形機3は、射出口31aを有する加熱筒31と、加熱筒31の内部に配置されるスクリュー32と、加熱筒31内に原成形材を供給するホッパ33とから概略構成されている。射出口31aは注入口41aに臨んでおり、ホッパ33から供給された原成形材は、回転するスクリュー32によって送られる途中で、ヒータ等を備えた加熱筒31によって加熱されて溶融し、液状となって射出口31aから注入口41aに射出され、キャビティ44内に導入される。   The resin supply unit 3 is provided so as to face the injection port 41a of the mold body 4. A screw injection molding machine is used as the resin supply unit 3. The screw injection molding machine 3 includes a heating cylinder 31 having an injection port 31a, a screw 32 disposed inside the heating cylinder 31, and a hopper 33 that supplies an original molding material into the heating cylinder 31. . The injection port 31a faces the injection port 41a, and the original molding material supplied from the hopper 33 is heated and melted by the heating cylinder 31 provided with a heater or the like while being fed by the rotating screw 32. Then, it is injected from the injection port 31 a to the injection port 41 a and introduced into the cavity 44.

次に、上記のように構成されたタブレット製造装置の作動について説明する。図2は、本発明のタブレット製造装置によるタブレットの成形加工の手順を説明する図である。まず、図2(a)樹脂供給においては、上部駆動機構50は作動前の状態であり、上押圧体5は型本体4の間隙内に所定の上昇位置に留まっている。また下押圧体6は、下部駆動機構60によって上昇位置に押し上げられ、円形部材61が型本体4の下端面に当接して蓋の役割をしており、下押圧体6は型本体4の間隙内に嵌入している。このようにして、型本体4と上押圧体5及び下押圧体6とが組み合わされた状態でキャビティ44が形成され、このキャビティ44に注入口41aが連通している。このような状態で型本体4の側面に設けた成形材の注入口41aから型部2のキャビティ44内に、スクリュー射出成形機3で溶融された所定量の成形材を供給する。   Next, the operation of the tablet manufacturing apparatus configured as described above will be described. FIG. 2 is a diagram for explaining a tablet molding process performed by the tablet manufacturing apparatus of the present invention. First, in FIG. 2A, in the resin supply, the upper drive mechanism 50 is in a state before operation, and the upper pressing body 5 remains in a predetermined ascending position in the gap of the mold body 4. The lower pressing body 6 is pushed up to the raised position by the lower drive mechanism 60, and the circular member 61 abuts on the lower end surface of the mold body 4 to act as a lid. The lower pressing body 6 is a gap between the mold bodies 4. It is inserted inside. Thus, the cavity 44 is formed in a state where the mold body 4 is combined with the upper pressing body 5 and the lower pressing body 6, and the injection port 41 a communicates with the cavity 44. In this state, a predetermined amount of the molding material melted by the screw injection molding machine 3 is supplied from the molding material injection port 41 a provided on the side surface of the mold body 4 into the cavity 44 of the mold part 2.

所定量の成形材がキャビティ44内に供給されたら、スクリュー射出成形機3からの成形材の供給を停止し、図2(b)で示すように下押圧体6をそのままの状態にしておき、上部駆動機構50を作動して上押圧体5を降下させて、上押圧体5と下押圧体6とでキャビティ44内に充填された成形材を押圧成形する。このとき、上押圧体5の下端部が型本体4の側面に形成された注入口41aより下方にまで降下して、押圧成形を行うようにする。このようにすることで、押圧成形時に成形材が注入口41aの方に逆流するのを防止でき、タブレットの計量精度が向上する。   When a predetermined amount of the molding material is supplied into the cavity 44, the supply of the molding material from the screw injection molding machine 3 is stopped, and the lower pressing body 6 is left as it is as shown in FIG. The upper driving mechanism 50 is operated to lower the upper pressing body 5, and the upper pressing body 5 and the lower pressing body 6 press-mold the molding material filled in the cavity 44. At this time, the lower end portion of the upper pressing body 5 is lowered below the injection port 41a formed on the side surface of the mold body 4, and press molding is performed. By doing in this way, it can prevent that a molding material flows backward toward the injection port 41a at the time of press molding, and the measurement precision of a tablet improves.

成形材が固化した後、図2(c)に示すように、上部及び下部駆動機構50,60を作動して、下押圧体6を下降させると共に、上押圧体5を更に下降させ、成形材を押圧成形することによって形成されたタブレット10を型本体4から押し出す。このようにして、完全に型本体4から押し出されたタブレット10は、図2(d)に示されるように、製品として取り出される。   After the molding material is solidified, as shown in FIG. 2 (c), the upper and lower drive mechanisms 50, 60 are operated to lower the lower pressing body 6 and further lower the upper pressing body 5 to form the molding material. The tablet 10 formed by pressing is extruded from the mold body 4. In this way, the tablet 10 completely pushed out from the mold body 4 is taken out as a product as shown in FIG.

このように、本発明では、樹脂供給部3であるスクリュー射出成形機でスクリュー搬送中に加熱された成形材(樹脂)を型部2に供給しているので、成形後のタブレットは内部までしっかり加熱されている。
また、上押圧体5で押し出してタブレット(成形品)を取り出すので、成形後に短時間で取り出せ、温度が低下することなく次工程(本成形工程)を行うことができるようになる。
Thus, in this invention, since the molding material (resin) heated during screw conveyance with the screw injection molding machine which is the resin supply part 3 is supplied to the type | mold part 2, the tablet after shaping | molding firmly to the inside. It is heated.
Moreover, since it extrudes with the upper press body 5 and a tablet (molded article) is taken out, it can take out in a short time after shaping | molding, and it becomes possible to perform the next process (main shaping | molding process) without the temperature falling.

以上説明したように、本発明では、樹脂供給部としてスクリュー射出成形機を採用し、またリング状のタブレットを形成する型部として、それぞれ内外径が等しい円筒形状の上押圧体と下押圧体を使用することで、製品成形前の加熱を廃止でき、タブレット内のガスを完全に除去することができる。   As described above, in the present invention, a screw injection molding machine is adopted as the resin supply part, and the cylindrical upper pressing body and the lower pressing body having the same inner and outer diameters are used as the mold parts forming the ring-shaped tablet. By using it, heating before product molding can be abolished, and the gas in the tablet can be completely removed.

本発明の実施の形態のタブレット製造装置の全体構成を示す図面である。It is drawing which shows the whole structure of the tablet manufacturing apparatus of embodiment of this invention. 本発明のタブレット製造装置によるタブレットの製造工程(a)〜(d)を説明する図である。It is a figure explaining the manufacturing process (a)-(d) of the tablet by the tablet manufacturing apparatus of this invention. 従来のタブレットの製造を説明する図である。It is a figure explaining manufacture of the conventional tablet.

符号の説明Explanation of symbols

1…タブレット製造装置
2…型部
3…樹脂供給部(スクリュー射出成形機)
31…加熱筒
31a…射出口
32…スクリュー
33…ホッパ
4…型本体
41…円筒体
41a…注入口
42…円柱体
43…蓋体
44…キャビティ
5…上押圧体
50…上部駆動機構
51…連結部材
6…下押圧体
60…下部駆動機構
61…円形部材
DESCRIPTION OF SYMBOLS 1 ... Tablet manufacturing apparatus 2 ... Mold part 3 ... Resin supply part (screw injection molding machine)
31 ... Heating cylinder 31a ... Injection port 32 ... Screw 33 ... Hopper 4 ... Mold body 41 ... Cylindrical body 41a ... Injection port 42 ... Column body 43 ... Lid 44 ... Cavity 5 ... Upper pressing body 50 ... Upper drive mechanism 51 ... Connection Member 6 ... Lower pressing body 60 ... Lower drive mechanism 61 ... Circular member

Claims (3)

タブレットを成形する型部と、この型部に成形材を注入する樹脂供給部とからなるタブレット製造装置において、
前記樹脂供給部が、スクリュー射出成形機であり、
前記型部が、円筒体と、前記円筒体と共に成形材が注入される空間を形成し、成形材を上から加圧する上押圧体と、成形材を下から加圧する下押圧体とからな
前記スクリュー射出成形機から前記空間内に成形材を注入する注入口が、前記円筒体の側面に穿設されており、
所定量の成形材が前記空間内に供給されたら、前記上押圧体の下端部が前記注入口よりも下方にまで降下して、前記注入口を塞ぐと共に、前記上押圧体と前記下押圧体とで前記空間内に充填された成形材を押圧成形することを特徴とするタブレット製造装置。
In a tablet manufacturing apparatus comprising a mold part for molding a tablet and a resin supply part for injecting a molding material into the mold part,
The resin supply unit is a screw injection molding machine;
The mold part is a cylindrical body, a space in which molding material is injected to form together with the cylindrical body, the upper pressing member for pressing from above the molding material, Ri Do and a lower pressing member for pressing the molding material from the bottom ,
An injection port for injecting a molding material into the space from the screw injection molding machine is formed in a side surface of the cylindrical body,
When a predetermined amount of the molding material is supplied into the space, the lower end portion of the upper pressing body descends below the injection port to close the injection port, and the upper pressing body and the lower pressing body. And press-molding the molding material filled in the space .
前記タブレットがリング状で、前記上押圧体と前記下押圧体とが共にリング状であることを特徴とする請求項1に記載のタブレット製造装置。   The tablet manufacturing apparatus according to claim 1, wherein the tablet is ring-shaped, and the upper pressing body and the lower pressing body are both ring-shaped. 前記上押圧体と、前記下押圧体及び前記リング状タブレットとが、その内外径が等しい円筒形状であることを特徴とする請求項2に記載のタブレット製造装置。   The tablet manufacturing apparatus according to claim 2, wherein the upper pressing body, the lower pressing body, and the ring-shaped tablet have a cylindrical shape having the same inner and outer diameters.
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