JP3553260B2 - Closed kneader - Google Patents
Closed kneader Download PDFInfo
- Publication number
- JP3553260B2 JP3553260B2 JP02526996A JP2526996A JP3553260B2 JP 3553260 B2 JP3553260 B2 JP 3553260B2 JP 02526996 A JP02526996 A JP 02526996A JP 2526996 A JP2526996 A JP 2526996A JP 3553260 B2 JP3553260 B2 JP 3553260B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- short
- long
- kneaded
- wing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
- B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
- B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
- B29B7/186—Rotors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/26—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
- B29B7/263—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors from the underside in mixers having more than one rotor and a a casing closely surrounding the rotors
- B29B7/266—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors from the underside in mixers having more than one rotor and a a casing closely surrounding the rotors using sliding doors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、ゴム、プラスチック等の混練に使用する密閉式混練機に関するものである。
【0002】
【従来の技術】
従来の密閉式混練機を図5及び図6により説明すると、6が密閉されたミキシングチャンバー、1が同ミキシングチャンバー6の内部に平行に配設された2つのロータ、2が同各ローラ1に設けた2つの長翼、3が回転方向上流側の長翼2の後方及び回転方向下流側の長翼2の後方に各ロータ1の一端部側及び他端部側を始点として設けた短翼、4が各ロータ1の回転方向、7がフローティングウェイト、8がドロップドアで、各ロータ1を逆方向に回転させる一方、ホッパー(図示せず)から投入した被混練物をフローティングウェイト7を下降させることにより、ミキシングチャンバー6内へ圧入させて混練する。
【0003】
そして混練を終了したら、ミキシングチャンバー6下部のドロップドア8を開いて、ミキシングチャンバー6外へ排出する。
【0004】
【発明が解決しようとする課題】
密閉式混練機に求められる性能は、混練品質及び生産性の向上である。これらの要求性能を向上させるためには、被混練物に対する剪断性や流動性が重要であり、特にゴムの混練においては、配合剤であるカーボンブラックやオイル等との十分な混練が必要である。
【0005】
しかし最近のゴムの高品質化に伴い、配合剤としてのオイル投入量が増加することにより、オイルが潤滑剤になって、チャンバー壁との間でゴムの滑りが生じることがある。
この場合、配合剤が十分に混練されなくて、品質が低下するとともに、スリップにより混練時間が長くなって、生産性が低下するという問題があった。
【0006】
本発明は前記の問題点に鑑み提案するものであり、その目的とする処は、混練品質、生産性を向上できる密閉式混練機を提供しようとする点にある。
【0007】
【課題を解決するための手段】
上記の目的を達成するために、本発明は、密閉されたミキシングチャンバーの内部に平行に配設されて互いが逆方向に回転する2つのロータを有し、各ロータのそれぞれに2つの長翼を設けた密閉式混練機において、前記各長翼のうち、回転方向上流側の長翼の後方にロータの両端部側を始点とする短翼を設け、回転方向下流側の長翼の後方にロータの両端部側を始点とする短翼を設けている(請求項1)。またこの密閉式混練機において、各長翼の両端部を切り欠いて、そこに被混練物の流路を形成してもよい(請求項2)。またこの密閉混練機において、各ロータの回転により被混練物をロータの両端部側からロータの内側に向かって流動させるように各短翼をロータ上に配設してもよい(請求項3)。
【0008】
【発明の実施の形態】
次に本発明の密閉式混練機を図1及び図2に示す実施形態により説明する。
図1は、同密閉式混練機のロータの第1実施形態を示す展開図、図2は、同ロータの第2実施形態を示す展開図である。
図1の6が密閉されたミキシングチャンバー、1が同ミキシングチャンバー6の内部に平行に配設された2つのロータ、2が各ロータ1に設けた2つの長翼、4が各ロータ1の回転方向である。また3A、3Bが回転方向上流側の長翼2の後方のロータ1上にロータ1の一端部側及び他端部側を始点として設けた短翼、3C、3Dが回転方向下流側の長翼2の後方に各ロータ1の一端部側及び他端部側を始点として設けた短翼である。
【0009】
なお短翼3A、3Dは、従来の短翼3の設置位置付近に設けられるが、翼数の増大に伴い、翼長さ、形状等は最適形状に調整される。また翼数の増加により、チャンバー6内空間が減少するので、投入バッチ量の低下が問題になるような場合には、図2に示すように長翼2の両端部を切り欠いて、そこに被混練物の流路を形成してもよい(請求項2参照)。
【0010】
次に前記図1及び図2に示す密閉式混練機の作用を具体的に説明する。
各長翼2のうち、回転方向上流側の長翼2の後方にロータ1の両端部側を始点とする短翼3A、3Bを設け、回転方向下流側の長翼2の後方にロータ1の両端部側を始点とする短翼3C、3Dを設けており、長翼2によりロータ1の端部の方向へ分岐した被混練物が、これらの短翼3A、3B及び3C、3Dにより、ロータ1の内側に向かい流動して、ミキシングチャンバー内部での混練作用が向上する。
【0011】
このとき、被混練物は、ロータ1が1回転する間に、長翼2及び短翼3A〜3Dにより、強力な剪断作用を周方向で少なくとも2回以上受けることになり、被混練物が短時間で分散して、混練品質、生産性が向上する。5は被混練物の流れ方向を示している。
本発明の密閉混練機の作用を確認するため、チャンバー径φ128のラボミキサーを用いて、ゴム混練試験を実施した。
【0012】
図3は、ゴムが一定品質(ここではムーニ粘度を用いて評価した)になるのに必要な混練時間を示している。図3により、本発明の密閉式混練機のロータは、従来のものに比較して混練品質が短時間で向上することが明らかであり、生産性も向上することが明らかである。
またゴムにカーボンブラックやオイル等を添加して混練する場合、通常は、図4に示すような電力の経時変化を示す。添加剤としてオイルを投入した場合、オイルが潤滑油となって、チャンバー壁との間でゴムの滑りを生じるが、このとき、電力は一旦低下した後、再び上昇するので、混練時間が長くなる等の問題が発生する。このようなオイル添加時のゴム混練試験を行った結果、本発明の密閉式混練機では、スリップ時間が従来の約50%に短縮されることが確認された。
【0013】
【発明の効果】
本発明の密閉式混練機は前記のように各長翼のうち、回転方向上流側の長翼の後方にロータの端部側を始点とする短翼を設け、回転方向下流側の長翼の後方にロータの端部側を始点とする短翼を設けており、各長翼によりロータの両端部の方向へ分岐した被混練物をこれらの短翼によりロータの内側に向かい流動させるので、ミキシングチャンバー内部での被混練物の混練作用が向上する。このとき、被混練物は、ロータが1回転する間に、長翼及び短翼により強力な剪断作用を周方向で少なくとも2回以上受けることになり、被混練物を短時間で分散できる上に、オイル投入時のスリップ時間も短縮できて、混練品質、生産性を向上できる。
【図面の簡単な説明】
【図1】本発明の密閉式混練機のロータの第1実施形態を示す展開図である。
【図2】同ロータの第2実施形態を示す展開図である。
【図3】混練品質(ムーニ粘度)と混練時間との関係を示す説明図である。
【図4】電力−時間チャート図である。
【図5】従来の密閉混練機の縦断側面図である。
【図6】同密閉式混練機のロータの展開図である。
【符号の説明】
1 ロータ
2 長翼
3A、3B 回転方向上流側の長翼2の後方に設けた短翼
3C、3D 回転方向下流側の長翼2の後方に設けた短翼
4 回転方向
5 被混練物の流れ方向
6 ミキシングチャンバー
7 フローティングウェイト
8 ドロップドア[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an internal mixer used for kneading rubber, plastic, and the like.
[0002]
[Prior art]
5 and 6, a conventional closed kneader will be described. Referring to FIG. 5,
[0003]
When the kneading is completed, the drop door 8 at the lower part of the
[0004]
[Problems to be solved by the invention]
The performance required of the closed kneader is to improve kneading quality and productivity. In order to improve these required performances, shearability and fluidity with respect to the material to be kneaded are important, and in the kneading of rubber in particular, sufficient kneading with a compounding agent such as carbon black or oil is necessary. .
[0005]
However, with the recent improvement in quality of rubber, an increase in the amount of oil added as a compounding agent causes the oil to become a lubricant, which may cause slippage of the rubber with the chamber wall.
In this case, there is a problem that the compounding agent is not sufficiently kneaded, the quality is reduced, and the kneading time is prolonged due to slip, and the productivity is reduced.
[0006]
The present invention has been made in view of the above problems, and has as its object to provide a closed kneader capable of improving kneading quality and productivity.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises two rotors arranged in parallel in a closed mixing chamber and rotating in opposite directions, each having two long blades. In the closed kneader provided with, among the long wings, short wings starting at both ends of the rotor are provided behind the long wing on the upstream side in the rotation direction, and behind the long wing on the downstream side in the rotation direction. Short wings are provided starting from both ends of the rotor (claim 1). Further, in this closed kneader, both ends of each long blade may be cut out to form a flow path for the material to be kneaded therein (claim 2). Further, in this closed kneader, each short blade may be arranged on the rotor so that the material to be kneaded flows from both ends of the rotor toward the inside of the rotor by the rotation of each rotor. .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the internal mixer according to the present invention will be described with reference to the embodiment shown in FIGS.
FIG. 1 is a development view showing a first embodiment of the rotor of the internal mixer, and FIG. 2 is a development view showing a second embodiment of the rotor.
In FIG. 1, 6 is a closed mixing chamber, 1 is two rotors arranged in parallel inside the
[0009]
The
[0010]
Next, the operation of the internal mixer shown in FIGS. 1 and 2 will be specifically described.
Of each
[0011]
At this time, the material to be kneaded receives a strong shearing action at least twice in the circumferential direction by the
In order to confirm the operation of the closed kneader of the present invention, a rubber kneading test was performed using a laboratory mixer having a chamber diameter of φ128.
[0012]
FIG. 3 shows the kneading time required for the rubber to reach a constant quality (evaluated here using Mooney viscosity). FIG. 3 clearly shows that the kneading quality of the rotor of the hermetic kneader of the present invention is improved in a shorter time than that of the conventional rotor, and that the productivity is also improved.
In addition, when carbon black, oil, or the like is added to rubber and kneaded, the power usually shows a temporal change as shown in FIG. When oil is added as an additive, the oil becomes a lubricating oil, causing rubber to slide between the chamber walls. At this time, since the power once decreases and then increases again, the kneading time becomes longer. And other problems occur. As a result of a rubber kneading test performed when such an oil was added, it was confirmed that the slip time was reduced to about 50% of the conventional kneader of the present invention.
[0013]
【The invention's effect】
The closed kneader of the present invention, as described above, among the long blades, the short blades starting from the end side of the rotor are provided behind the long blades on the upstream side in the rotation direction, and the long blades on the downstream side in the rotation direction are provided. A short wing is provided at the rear end starting from the end of the rotor, and the material to be kneaded branched toward both ends of the rotor by the long wings is caused to flow toward the inside of the rotor by these short wings. The kneading action of the material to be kneaded inside the chamber is improved. At this time, the material to be kneaded is subjected to strong shearing action by the long blades and short blades at least twice in the circumferential direction during one rotation of the rotor, and the material to be kneaded can be dispersed in a short time. Also, the slip time at the time of oil supply can be shortened, and the kneading quality and productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a development view showing a first embodiment of a rotor of an internal mixer of the present invention.
FIG. 2 is a development view showing a second embodiment of the rotor.
FIG. 3 is an explanatory diagram showing a relationship between kneading quality (Mouni viscosity) and kneading time.
FIG. 4 is a power-time chart.
FIG. 5 is a vertical sectional side view of a conventional closed kneader.
FIG. 6 is a development view of a rotor of the internal mixer.
[Explanation of symbols]
Reference Signs List 1
Claims (3)
前記各ロータには、回転方向順に、長翼、2つの短翼、長翼、2つの短翼が各々配設されているとともに、前記各々の2つの短翼のうち一方の短翼は、前記ロータの一端部を始点として設けられているとともに、他方の短翼は前記ロータの他端部を始点として設けられていることを特徴とする密閉式混練機。In a closed kneader having two rotors arranged in parallel in a sealed mixing chamber and rotating in opposite directions to each other, and each rotor is provided with two long blades,
In each of the rotors, a long wing, two short wings, a long wing, and two short wings are respectively disposed in the order of rotation, and one of the two short wings is the short wing, A closed kneader, wherein one end of the rotor is provided as a starting point, and the other short blade is provided starting from the other end of the rotor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP02526996A JP3553260B2 (en) | 1996-02-13 | 1996-02-13 | Closed kneader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP02526996A JP3553260B2 (en) | 1996-02-13 | 1996-02-13 | Closed kneader |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09216224A JPH09216224A (en) | 1997-08-19 |
JP3553260B2 true JP3553260B2 (en) | 2004-08-11 |
Family
ID=12161317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP02526996A Expired - Lifetime JP3553260B2 (en) | 1996-02-13 | 1996-02-13 | Closed kneader |
Country Status (1)
Country | Link |
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JP (1) | JP3553260B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4781725B2 (en) * | 2005-06-09 | 2011-09-28 | 三菱重工業株式会社 | Continuous kneader |
JP4568785B2 (en) * | 2009-01-19 | 2010-10-27 | 株式会社神戸製鋼所 | Kneading rotor |
JP4542605B1 (en) * | 2009-04-15 | 2010-09-15 | 株式会社神戸製鋼所 | Closed kneading machine and kneading rotor |
JP5792650B2 (en) * | 2012-01-31 | 2015-10-14 | 株式会社神戸製鋼所 | Kneading rotor and hermetic kneading machine including the same |
-
1996
- 1996-02-13 JP JP02526996A patent/JP3553260B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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JPH09216224A (en) | 1997-08-19 |
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