JPH069783Y2 - Discharge device of twin-screw kneader - Google Patents

Description

【考案の詳細な説明】 ［産業上の利用分野］ 本願考案は二軸混練機の排出装置、特に熱硬化性樹脂の
混練に適した同機の排出装置に係る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a discharging device of a twin-screw kneading machine, and more particularly to a discharging device of the same machine suitable for kneading a thermosetting resin.

［従来の技術］ 二軸の回転軸へ目的に応じたパドルを多数取り付け、密
閉容器（バレル）内で装入された材料を混練する二軸混
練軸は他の型式の混練機では得られなかった機能を発揮
されることが判り、樹脂，ゴム，薬品，食品など多岐に
亘ってその使用の範囲を拡げつつある。[Prior Art] A twin-screw kneading shaft in which a large number of paddles according to the purpose are attached to a two-spindle rotating shaft to knead materials charged in a closed container (barrel) cannot be obtained by other types of kneaders. It has been found that it can exert such a function, and the range of its use is expanding in various fields such as resin, rubber, chemicals, and food.

機能を目的に適合させる上で内装するパドルの形状や組
合せの重要なことは言うまでもないが、混練し終った材
料の排出部についても製品の品質に影響を与える要素が
隠されている。すなわちこの型式の混練機に好適とされ
る材料は一般には流動性の悪い流動体の様相を示すもの
が多く、円滑に外部へ排出され難いと言う課題を持つも
のが多数を占める。成分的には相当デリケートな物質で
もあるから、排出時に停滞したり不均等となったりする
と、排出口に糊着してそのまま固化したり、ゲル化して
所定の品質から外れて次工程へ向うこととなる。Needless to say, the shape and combination of the paddles to be installed in order to adapt the function to the purpose are important, but the factors that affect the quality of the product are also hidden in the discharge part of the material after kneading. That is, most of the materials suitable for this type of kneading machine generally have the appearance of a fluid having poor fluidity, and most of them have the problem of being difficult to be discharged smoothly to the outside. Since it is also a delicate substance in terms of composition, if it stagnates or becomes uneven during discharge, it will stick to the discharge port and solidify as it is, or it will gel and deviate from the prescribed quality and move to the next process. Becomes

したがってこの排出口については既に幾つかの改善や工
法が加えられていて、たとえば実公昭６３−２３１２６
号公報・第４図では排出口に着脱自在の吐出口アダプタ
ー１０１をとりつけて円筒状に取囲んで吐出口スクリュ
ー１０２によって押出された樹脂がバレル外へ漏れるの
を防止したと言う。また、実公昭５５−３２７２８号公
報・第５図では吐出口の壁面１０３を末広状とし、その
下部に突起部１０４を設け、この外周の吐出シリンダー
１０５に加熱ジャケット１０６を設けた構成によって溶
融樹脂が吐出口の壁面に付着するのを防ぎ、固化しない
ようにできたと言う。Therefore, some improvements and construction methods have already been added to this discharge port, for example, Jitsuko Sho 63-23126.
In FIG. 4 and FIG. 4, it is said that a detachable outlet adapter 101 is attached to the outlet to enclose it in a cylindrical shape to prevent the resin extruded by the outlet screw 102 from leaking out of the barrel. Further, in FIG. 5 of JP-B-55-32728, the wall surface 103 of the discharge port has a divergent shape, a protrusion 104 is provided at the lower part thereof, and a heating jacket 106 is provided on the discharge cylinder 105 at the outer periphery of the wall surface. It was said that it could be prevented from adhering to the wall surface of the discharge port and prevented from solidifying.

［考案が解決しようとする課題］ ここに揚げた二例を含め一般に、従来から使用されてき
た二軸混練機の排出装置では熱硬化性樹脂、たとえばエ
ポキシ樹脂などを主体とした混練の排出時に課題が残
る。[Problems to be solved by the invention] In general, including the two examples fried here, the discharge device of the twin-screw kneader that has been used in the past generally discharges the kneading mainly of thermosetting resin such as epoxy resin. Challenges remain.

溶融状態の熱硬化性樹脂は連続的に混練作用を受けて後
部に至り排出装置に差しかかるとき、熱のため硬化反応
が進行して流動性を失い、このためさらに硬化が進んで
開口部付近の器壁に糊着して通路を塞ぎ以後の混練作用
の進行を妨げ、滞留時間が所定以上に長引いて機内の材
料をゲル化させ、不良品を作る原因となりやすい。この
ゲル化した不良品が累積したのち脱落して正常に排出さ
れた混練材内へ落ち込むと製品１ロット全部の品位が劣
化し、管理上の大きな障害となる。本願考案は以上に述
べた課題を解決するために特に熱硬化性樹脂の混練に適
合した二軸混練機の排出装置を提供することを目的とす
る。When the thermosetting resin in the molten state is continuously subjected to the kneading action and reaches the rear part and reaches the discharge device, the curing reaction progresses due to heat and loses fluidity. It adheres to the vessel wall to block the passage and hinders the progress of the kneading action after that, and the residence time is prolonged for a predetermined time or longer to cause the material inside the machine to gel and cause defective products. If the gelled defective products accumulate and then fall off and fall into the normally discharged kneading material, the quality of one lot of the product deteriorates, which is a great obstacle to management. An object of the present invention is to provide a discharge device of a twin-screw kneader that is particularly suitable for kneading a thermosetting resin in order to solve the problems described above.

［課題を解決するための手段］ 本願考案に係る二軸混練機の排出装置は、バレル底面の
一部と、バレルの開口端が嘴状に突出して角度αをなし
て下部へ退入する傾斜部とこれに続く垂直部とよりなる
内周面と、所望の間隔をおいて立設した外周面と、内外
周面を塞ぐ底面とによって中空筒体を形成し、該中空筒
体の下底部近くに冷媒の給口を、頂部近くに冷媒の排口
をそれぞれ配設したことによって前記の課題を解決し
た。[Means for Solving the Problems] A discharging device for a twin-screw kneading machine according to the present invention has a slope in which a part of a bottom surface of a barrel and an opening end of the barrel project like a beak and make an angle α to retreat to a lower part. Forming a hollow cylindrical body by an inner peripheral surface consisting of a portion and a vertical portion following the outer peripheral surface, an outer peripheral surface erected at a desired interval, and a bottom surface closing the inner and outer peripheral surfaces, and a lower bottom portion of the hollow cylindrical body. The above-mentioned problem was solved by disposing a refrigerant supply port nearby and a refrigerant discharge port near the top.

［作用］ 第１図から第３図までは本願考案の実施例を示す図面で
ある。図に基いて本願考案の作用を示すと、二軸混練機
の本体をなすバレル１は一端に駆動機２を具え、この端
部上方に原材料の供給口３、他端下方に混練後の材料の
排出口４を有する断面だるま形の密閉容器であり、内部
の二軸に多数のパドルを固着するが、図示を省略する。[Operation] FIGS. 1 to 3 are drawings showing an embodiment of the present invention. The operation of the present invention will be described with reference to the drawings. The barrel 1 which forms the main body of the twin-screw kneader has a driving machine 2 at one end, a feed port 3 for raw material above this end, and a material after kneading below the other end. This is a closed container having a duller-shaped cross section having a discharge port 4, and a large number of paddles are fixed to the inner two shafts, but the illustration is omitted.

排出口４を形成する本願の排出装置５はバレル１の底面
の一部である５１、端部が嘴状に突出した尖端５２、こ
の尖端から角度αで下部へ退入する傾斜面５３、これに
続く垂直面５４によって内周面を形成し、バレルの開口
部１１に内嵌する外周面５５と底面５６とによって排出
口４を取囲む逃がし部（傾斜面）を具えた中空筒体５７
を形成する。The discharge device 5 of the present application forming the discharge port 4 is 51 which is a part of the bottom surface of the barrel 1, a tip 52 whose end projects like a beak, and an inclined surface 53 which retreats downward from the tip at an angle α. A hollow cylindrical body 57 having an escape portion (inclined surface) surrounding an outlet 4 by an outer peripheral surface 55 and a bottom surface 56 which are fitted into the opening 11 of the barrel.
To form.

なお実施レベルとしてはバレルの本体に着脱自在となる
ように取付フランジ５８を底部に具え、バレルの開口部
と容易に螺着するように構成した。As an implementation level, a mounting flange 58 was provided at the bottom so that it could be attached to and detached from the barrel body, and was easily screwed into the barrel opening.

中空筒体５７の下底部近くに冷媒の給口５９を設けて機
外の冷媒源と連結する一方、頂部近くに排口６０を設け
ている。A refrigerant supply port 59 is provided near the lower bottom of the hollow cylindrical body 57 to connect with a refrigerant source outside the machine, while an exhaust port 60 is provided near the top.

この図の場合では排口６０から中空筒体内を縦貫して底
部より外部に連通する排管６１を立設して手軽にまとめ
た構成をとった。供給口３から供給された熱硬化性の樹
脂Ｐはバレル１内で混練作用を受けながら進み（第３図
では左方へ）、普通の場合は固練りの流動体となって排
出口４へ達する。ここにおいて樹脂Ｐは軸方向への押圧
力から解放されるために垂直方向へ方向を変えるが、こ
こで尖端５２が丁度刃物で流動体を切り裂くように流れ
に刃を入れて裂断する。この尖端５２は常に冷媒Ｃによ
って冷却作用を受けているから、熱硬化性樹脂はバレル
内とは異なる異常な低温の金属表面に接するため、付着
することなく底面５１の開口面そのままの形状で下方へ
押し出され、角度αだけ退入した傾斜面５３や垂直面５
４にほとんど触れる機会なく排出される。In the case of this figure, a drain pipe 61 that extends vertically through the hollow cylindrical body from the drain port 60 and communicates with the outside from the bottom is installed upright to be easily assembled. The thermosetting resin P supplied from the supply port 3 advances in the barrel 1 while undergoing the kneading action (to the left in FIG. 3), and in the normal case, it becomes a solidified fluid to the discharge port 4. Reach Here, the resin P changes its direction in the vertical direction in order to be released from the pressing force in the axial direction, but here, the tip 52 just cuts the fluid just like the tip 52 cuts the fluid by the cutting tool. Since the tip 52 is constantly cooled by the refrigerant C, the thermosetting resin comes into contact with an abnormally low temperature metal surface different from the inside of the barrel. Sloped surface 53 or vertical surface 5 pushed out to and retreated by an angle α.
It is discharged with almost no chance to touch 4.

したがって理屈の上では退入角度αは特に限定する必要
はないが、経験的には２０°乃至３０°が適当であり、
余り大きすぎるとバレルの開口部１１を適当に取れば排
出口の先端が大きくなりすぎて排出装置も大きくなるの
で好ましくない。Therefore, theoretically, it is not necessary to limit the retreat angle α, but empirically, 20 ° to 30 ° is appropriate.
If it is too large, if the opening 11 of the barrel is properly taken, the tip of the discharge port becomes too large and the discharge device becomes large, which is not preferable.

この実施例では排出装置ごと全部を混練機本体から着脱
自在としているので、熱硬化性樹脂以外の材料を混練す
るときは別の排出装置と切り替えるか、又は離脱したま
まで使用してもよい。装置が角形，丸形の何れであって
もよいことは言うまでもない。In this embodiment, all the discharging devices are detachable from the main body of the kneading machine. Therefore, when kneading materials other than the thermosetting resin, they may be switched to another discharging device, or may be used while being separated. It goes without saying that the device may be either square or round.

なおエポキシ樹脂Ｐの硬化点は１６０〜１８０℃であ
り、通常の混練時での温度はほぼ１２０℃までが適当で
あるが、冷媒としては中空筒体５７内の温度が常に１５
℃以下に保つように冷水を循環すればよいことも経験的
に確められている。The curing point of the epoxy resin P is 160 to 180 ° C., and the temperature during normal kneading is appropriately up to about 120 ° C. However, the temperature inside the hollow cylindrical body 57 is always 15 as a refrigerant.
It is empirically confirmed that cold water may be circulated so as to keep the temperature below ℃.

［考案の効果］ 本願考案は以上に述べたように排出口の始端において流
動体を裂断すると同時に低温金属を介した熱伝導によっ
て裂断部表面の熱を奪うため、熱硬化性樹脂は硬化した
り付着したりすることなく均一性を保って下方へ排出さ
れ次工程の品質を一貫して保証する。[Effect of the Invention] As described above, the present invention breaks the fluid at the beginning of the discharge port, and at the same time removes heat from the surface of the broken portion by heat conduction through the low temperature metal, so that the thermosetting resin is hardened. The quality of the next process is consistently assured by discharging downward while maintaining the uniformity without sticking or adhering.

実施例特有の効果としては、着脱自在の排出装置とする
ことによって混練機自体の汎用性を具えさせ、多様な混
練材料に対応することができる。As an effect peculiar to the embodiment, the detachable discharge device makes the kneading machine itself versatile and can cope with various kneading materials.

【図面の簡単な説明】[Brief description of drawings]

第１図は本願考案実施例の斜視図、第２図は同じ実施例
の垂直断面図、第３図は第２図のＡ−Ａ断面図、第４図
と第５図は異なる従来の技術を示す垂直断面図。 １……バレル、４……排出口、５……排出装置 51……（バレルの）底面、52……尖端 53……傾斜面、54……垂直面、55……外周面 56……（排出装置の）底面、57……中空筒体 59……冷媒の給口、60……冷媒の排口 61……排管、Ｃ……冷媒、Ｐ……熱硬化性樹脂 α……中空筒体内周面の傾斜角FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a vertical sectional view of the same embodiment, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIGS. FIG. 1 ... Barrel, 4 ... Ejection port, 5 ... Ejection device 51 ... (Barrel) bottom surface, 52 ... Tip 53 ... Inclined surface, 54 ... Vertical surface, 55 ... Outer peripheral surface 56 ... ( Bottom of discharge device, 57 ... Hollow cylinder 59 ... Refrigerant supply port, 60 ... Refrigerant discharge port 61 ... Discharge pipe, C ... Refrigerant, P ... Thermosetting resin α ... Hollow cylinder Inclination angle of body circumference

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】二軸混練機の排出装置において、バレル底
面の一部と、バレルの開口端が嘴状に突出して角度αを
なして下部へ退入する傾斜部とこれに続く垂直部とより
なる内周面と、所望の間隔をおいて立設した外周面と、
内外周面を塞ぐ底面とによって中空筒体を形成し、該中
空筒体の下底部近くに冷媒の給口を、頂部近くに冷媒の
排口をそれぞれ配設したことを特徴とする二軸混練機の
排出装置。1. A discharge device of a twin-screw kneader, a part of a bottom surface of a barrel, an inclined part in which an opening end of the barrel projects like a beak and forms an angle α and retreats to a lower part, and a vertical part following the inclined part. An inner peripheral surface made of, and an outer peripheral surface erected at a desired interval,
A biaxial kneading characterized in that a hollow cylinder is formed by a bottom surface that closes the inner and outer peripheral surfaces, and a refrigerant supply port is provided near the lower bottom of the hollow cylinder and a refrigerant discharge port is provided near the top. Machine ejector. 【請求項２】請求項(1)において中空筒体がバレル本体
と脱着自在である二軸混練機の排出装置。2. A discharge device for a twin-screw kneader according to claim 1, wherein the hollow cylinder is detachable from the barrel body.