JP2001009830A - Continuous kneader, method for kneading, and rotor for continuous kneader - Google Patents

Continuous kneader, method for kneading, and rotor for continuous kneader

Info

Publication number
JP2001009830A
JP2001009830A JP11180420A JP18042099A JP2001009830A JP 2001009830 A JP2001009830 A JP 2001009830A JP 11180420 A JP11180420 A JP 11180420A JP 18042099 A JP18042099 A JP 18042099A JP 2001009830 A JP2001009830 A JP 2001009830A
Authority
JP
Japan
Prior art keywords
rotor
kneaded
kneading
feed
section
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.)
Granted
Application number
JP11180420A
Other languages
Japanese (ja)
Other versions
JP3365747B2 (en
Inventor
Yoshinori Kuroda
好則 黒田
Katsunori Takahashi
克典 高橋
Tatsuya Tanaka
達也 田中
Masahiko Kashiwa
▲真▼彦 柏
Shigehiro Kasai
重宏 笠井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP18042099A priority Critical patent/JP3365747B2/en
Publication of JP2001009830A publication Critical patent/JP2001009830A/en
Application granted granted Critical
Publication of JP3365747B2 publication Critical patent/JP3365747B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/582—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/465—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft each shaft comprising rotor parts of the Banbury type in addition to screw parts
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B29B7/489—Screws
    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
    • 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
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
    • B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
    • 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
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve an operating efficiency of a continuous kneader by suppressing an excess temperature rise of a material to be kneaded in association with a decrease in a treating amount as much as possible, and widening a range of the amount capable of being suitably kneaded at the same rotational speed of a rotor to a wider range. SOLUTION: In the continuous kneader comprising a chamber 2 having a supply port 13 at an upstream side end and a discharge port 15 at a downstream side end, and a rotor 4 having a feeder 18 of a material to be kneaded and a kneading unit 19 on an outer periphery and rotatably inserted into the chamber 2 in such a manner that the unit 19 has a sending blade 19A twisted in a direction for sending the material to the downstream side and a returning blade 19B disposed at the downstream side of the blade 19A and twisted in a direction for returning the material to the upstream side; a twisting angle of the blade 19B in a radial direction of the rotor is set to a smaller angle than that of the blade 19A in the radial direction of the rotor.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、プラスチックやゴ
ム等の高分子樹脂材料を混練するための連続混練機とそ
の混練方法及び連続混練機のロータに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous kneader for kneading a polymer resin material such as plastic or rubber, a kneading method thereof, and a rotor of the continuous kneader.

【０００２】[0002]

【従来の技術】上記連続混練機は、高速回転するロータ
でプラスチックやゴム材料等の被混練材料に強いせん断
作用を加えて短時間に可塑化溶融するもので、この可塑
化溶融した樹脂に各種の充填剤や添加剤を効率よく練り
込んで混合分散することで種々の品質の樹脂製品を製造
することができる。特に、ロータの軸方向両端をベアリ
ングで支持した両持ち構造の連続混練機は、ロータが先
触れしてその先端がチャンバに接触することがないので
高速度でロータを回転することができ、生産能力が高い
混練造粒設備を容易に構成できる特徴がある。2. Description of the Related Art The continuous kneading machine is a high-speed rotating rotor which applies a strong shearing action to a material to be kneaded such as plastic or rubber material to plasticize and melt in a short time. By efficiently kneading and mixing and dispersing the fillers and additives described above, resin products of various qualities can be produced. In particular, a continuous kneader having a double-supported structure in which both ends in the axial direction of the rotor are supported by bearings can rotate the rotor at a high speed because the rotor does not come in contact with the tip and the tip does not come into contact with the chamber. Has a feature that the kneading and granulating equipment having a high density can be easily configured.

【０００３】かかる両端支持タイプの連続混練機のう
ち、特にツインロータタイプの二軸連続混練機では、一
端部に材料供給口を有するチャンバ内に、被混練材料の
フィード部と混練部を外周面に有する左右一対のロータ
がその軸方向両端を支持した状態で回転自在に挿通され
ている。そして、上記ロータの混練部は、通常、被混練
材料を下流側へ送る方向に捩じれた送り翼部と、この送
り翼部の下流側に配置されかつ被混練材料を上流側へ戻
す方向に捩じれた戻し翼部とを備えている（例えば、特
公昭５８−５０５３３号公報、特公平６−４１１３５号
公報参照）。[0003] Among such continuous kneaders of both ends supporting type, in particular, in a twin-rotor type twin-screw continuous kneader, a feed portion and a kneading portion of a material to be kneaded are provided in a chamber having a material supply port at one end. Are rotatably inserted while supporting both ends in the axial direction. The kneading portion of the rotor is usually twisted in a direction in which the material to be kneaded is twisted in a direction to send the material to the downstream side, and twisted in a direction arranged downstream of the sending blade portion and in a direction to return the material to be kneaded to the upstream side. (See, for example, Japanese Patent Publication No. 58-50533 and Japanese Patent Publication No. 6-41135).

【０００４】[0004]

【発明が解決しようとする課題】上記従来の連続混練機
において、時間当たりの処理量が１０（ｔ／ｈ）を超え
るような場合には、そのイニシャルコストの安さからイ
ンダクションモータと呼ばれる固定速度のモータを使用
することが多い。しかし、従来の連続混練機では、ロー
タの混練部において被混練材料をできるだけ滞留させて
十分に混練を行うべく、戻し翼部の捩じれ角度を送り翼
部の捩じれ角度とほぼ同じに設定してあるため、同じロ
ータ回転数の下では混練部における被混練材料の処理量
が低減するほど被混練材料の昇温が激しくなって温度制
御ができなくなることがある。In the above-mentioned conventional continuous kneader, when the throughput per hour exceeds 10 (t / h), a fixed-speed motor called an induction motor is used because of its low initial cost. Often a motor is used. However, in the conventional continuous kneader, the torsion angle of the return wing is set to be substantially the same as the torsion angle of the feed wing in order to allow the material to be kneaded to stay as much as possible in the kneading portion of the rotor and to perform sufficient kneading. Therefore, at the same rotor speed, the temperature of the material to be kneaded may increase as the amount of the material to be kneaded in the kneading section decreases, and the temperature control may not be performed.

【０００５】このため、従来の連続混練機では、ゲート
装置やギアポンプ等の混練度制御手段を有する場合であ
っても、当該装置に期待される最大の処理量（以下、期
待処理量という。）の７５％程度までしか被混練材料の
処理量を落とすことができないのが通常である。従っ
て、従来の連続混練機では、複数の減速比が設定された
減速機がモータに接続されているのが通常であり、期待
処理量の７５％以下となる大幅な処理量の変更に際して
は、クラッチ機構によりその減速比を切り換えてロータ
回転数を変更するようにしている。For this reason, in a conventional continuous kneader, even if it has a kneading degree control means such as a gate device or a gear pump, the maximum processing amount expected of the apparatus (hereinafter, referred to as an expected processing amount). Normally, the processing amount of the material to be kneaded can be reduced only up to about 75%. Therefore, in the conventional continuous kneader, it is normal that a speed reducer with a plurality of reduction ratios is connected to the motor, and when a large change in the throughput becomes 75% or less of the expected throughput, The reduction ratio is switched by a clutch mechanism to change the rotor speed.

【０００６】しかるに、減速機の減速比を切り換えてロ
ータ回転数を変更するには、ロータの回転を止めてライ
ン全体を停止させる必要があり、これでは時間的ロスや
スタートロスないしスタート不良に繋がる。また、複数
の減速比を設定できる減速機は大型かつ高価であるた
め、連続混練機の設備コストが増大する原因にもなって
いる。本発明は、このような実情に鑑み、処理量の低下
に伴う被混練材料の過大な昇温をできるだけ抑えるよう
にして、同じロータ回転数の下で適切に混練できる処理
量の範囲をより広範囲にし、もって連続混練機の運転効
率を向上することを目的とする。However, in order to change the speed of the rotor by switching the reduction ratio of the speed reducer, it is necessary to stop the rotation of the rotor and stop the entire line, which leads to a time loss, a start loss or a poor start. . Further, since a speed reducer capable of setting a plurality of speed reduction ratios is large and expensive, it also causes an increase in equipment cost of the continuous kneader. The present invention has been made in view of the above-described circumstances, and in order to minimize the excessive temperature rise of the material to be kneaded due to the decrease in the amount of processing, the range of the amount of processing that can be appropriately kneaded under the same rotor speed is broadened. Accordingly, an object of the present invention is to improve the operation efficiency of the continuous kneader.

【０００７】[0007]

【課題を解決するための手段】本発明は、上記目的を達
成するために、次の技術的手段を講じた。すなわち、本
発明は、ロータの混練部において、戻し翼部のロータ径
方向に対する捩じれ角度が送り翼部のロータ径方向に対
する捩じれ角度よりも小さい値に設定されていることを
特徴としている。この場合、被混練材料がチャンバ内の
混練部で混練される際に、被混練材料が戻し翼部から受
ける戻し力の方が送り翼部から受ける送り力よりもやや
小さい状態で混練されることになるので、被混練材料が
必要以上にチャンバ内の混練部の周囲に滞留し続けるこ
とがなく、このため、被混練材料の処理量の低下に伴っ
て同材料が過度に昇温するのが有効に防止される。In order to achieve the above object, the present invention takes the following technical measures. That is, the present invention is characterized in that in the kneading portion of the rotor, the twist angle of the return blade portion in the rotor radial direction is set to a value smaller than the twist angle of the feed blade portion in the rotor radial direction. In this case, when the material to be kneaded is kneaded in the kneading section in the chamber, the material to be kneaded is kneaded in a state where the return force received from the return blade is slightly smaller than the feed force received from the feed blade. Therefore, the material to be kneaded does not stay more than necessary around the kneading portion in the chamber, and therefore, the temperature of the material to be kneaded becomes excessively high with a decrease in the throughput of the material to be kneaded. Effectively prevented.

【０００８】一方、この種の連続混練機のロータにおい
て、混練部の送り翼部のロータ径方向に対する捩じれ角
度は通常約６０度に設定されている。そこで、かかる通
常の送り翼部を有するロータについては、その下流側に
配置される戻し翼部のロータ径方向に対する捩じれ角度
を６５度よりも大きくかつ８５度よりも小さい値に設定
することにより、上記の本発明を実施することができ
る。この場合、戻し翼部の捩じれ角度を６５度よりも大
きい値に設定したのは、後述の実施例でも明らかになる
ように、戻し翼部の捩じれ角度が６５度以下の場合に
は、その捩じれ度合いが送り翼部の捩じれ度合い（６０
度）と実質的な差がなく、従来の混練部と同様に戻し翼
部による戻し力が送り翼部による送り力とほぼ同じにな
るため、処理量を低下させた場合の被混練材料の昇温を
有効に抑えることができなくなるからである。On the other hand, in a rotor of this kind of continuous kneader, the twist angle of the feed blade portion of the kneading portion with respect to the rotor radial direction is usually set to about 60 degrees. Therefore, for a rotor having such a normal feed blade, by setting the twist angle of the return blade disposed downstream thereof to the rotor radial direction to a value larger than 65 degrees and smaller than 85 degrees, The invention described above can be implemented. In this case, the torsion angle of the return wing is set to a value greater than 65 degrees, as will be apparent from the embodiment described later, when the torsion angle of the return wing is 65 degrees or less. The degree is the degree of twist of the feed wing (60
And the return force of the return blade is almost the same as the feed force of the feed blade as in the conventional kneading section. This is because the temperature cannot be effectively suppressed.

【０００９】また、戻し翼部の捩じれ角度を８５度より
も小さい値に設定したのは、戻し翼部の捩じれ角度が８
５度以上の場合には、戻し翼部の形状がロータ軸方向に
平行な平行翼に近くなるため、高生産領域において被混
練材料が下流側に素通りし易くなって可塑化不良が発生
し、被混練材料が未溶融になる恐れがあるとともに、ロ
ータに偏荷重が掛かって芯ぶれを起こす恐れがあるから
である。そして、より好ましくは戻し翼部の捩じれ角度
を７０度以上でかつ８０度以下に設定しておけば、後述
の実験例から明らかなように、同じロータ回転数の下で
被混練材料の処理量を期待処理量の半分以下に低下させ
ても、過昇温を招来せずに被混練材料を適切に混練する
ことができる。The reason why the twist angle of the return wing is set to a value smaller than 85 degrees is that the twist angle of the return wing is 8 degrees.
In the case of 5 degrees or more, since the shape of the return blade portion is close to a parallel blade parallel to the rotor axis direction, the material to be kneaded easily passes downstream in a high production area, and poor plasticization occurs. This is because the material to be kneaded may not be melted, and the rotor may be unbalanced due to an unbalanced load. More preferably, if the twist angle of the return blade is set to 70 degrees or more and 80 degrees or less, as will be apparent from an experimental example described later, the throughput of the material to be kneaded under the same rotor rotation speed is obtained. Can be appropriately kneaded without inducing excessive temperature rise even if is reduced to half or less of the expected processing amount.

【００１０】[0010]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき説明する。図１及び図２は、本発明の第一の実
施形態を示しており、この実施形態においては、各種連
続混練機のうち、２ロータ式の二軸連続混練機に本発明
を採用している。図１に示すように、この実施形態で採
用した二軸連続混練機１は装置本体としてのチャンバ２
を備え、このチャンバ２内には、長手方向略円筒状の二
連の混練室３が断面視ほぼめがね孔形状をなすように連
通して形成されている。Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first embodiment of the present invention. In this embodiment, the present invention is applied to a two-rotor twin-screw continuous kneader among various continuous kneaders. . As shown in FIG. 1, a twin-screw continuous kneader 1 employed in this embodiment includes a chamber 2 as an apparatus main body.
In the chamber 2, two kneading chambers 3 each having a substantially cylindrical shape in the longitudinal direction are formed so as to communicate with each other so as to have a substantially eyeglass hole shape in cross section.

【００１１】このチャンバ２の各混練室３内には、被混
練材料をチャンバ２の一端側（上流側、図１の右側）か
ら他端側（下流側、図１の左側）に向かってフィードし
かつその途中で同材料を混練溶融する左右一対のロータ
４，４が互いに平行にかつ回転自在に挿通されている。
この各ロータ４，４は、その軸心方向両端部がチャンバ
２の上下流両側に設けた軸受け（ベアリング）５，６，
７を介して回転自在に支持されていて、相対向する内側
が上方から下方へ移動するよう互いに異なる方向に回転
駆動される。In each kneading chamber 3 of the chamber 2, the material to be kneaded is fed from one end side (upstream side, right side in FIG. 1) of the chamber 2 to the other end side (downstream side, left side in FIG. 1). A pair of left and right rotors 4, 4 for kneading and melting the same material in the middle thereof are inserted parallel to each other and rotatably.
Each of the rotors 4, 4 has a bearing (bearing) 5, 6, whose both ends in the axial direction are provided on both the upstream and downstream sides of the chamber 2.
7, and rotatably driven in mutually different directions so that opposing inner sides move downward from above.

【００１２】チャンバ２の上流側端には、ロータ４の駆
動装置８が接続されている。この駆動装置８は、チャン
バ２の上流側端にタンデムに接続されたケーシング９
と、このケーシング９内に挿通された各ロータ４，４の
駆動軸部１０を回転自在に支持する前後一対の前記軸受
け５，６と、その駆動軸部１０の軸方向中途部に固定し
た駆動ギア１１と、を備えている。一対のロータ４，４
のうち、一方のロータ４の駆動軸部１０は、ケーシング
９の更に上流側に突出され、その突出端部が減速機付き
のモータ１２に接続されている。各ロータ４，４の駆動
ギア１１は互いに直接噛み合っており、このため、モー
タ１２で一方のロータ４を回転駆動すると、他方のロー
タ４がそれと異なる方向に回転するようになっている。A driving device 8 for the rotor 4 is connected to the upstream end of the chamber 2. The driving device 8 includes a casing 9 connected to the upstream end of the chamber 2 in tandem.
And a pair of front and rear bearings 5 and 6 for rotatably supporting the drive shafts 10 of the rotors 4 and 4 inserted into the casing 9, and a drive fixed to a halfway portion of the drive shaft 10 in the axial direction. And a gear 11. A pair of rotors 4, 4
The drive shaft 10 of one of the rotors 4 protrudes further upstream of the casing 9, and the protruding end is connected to a motor 12 with a speed reducer. The drive gears 11 of the rotors 4 and 4 are directly meshed with each other. Therefore, when one of the rotors 4 is driven to rotate by the motor 12, the other rotor 4 rotates in a different direction.

【００１３】チャンバ２の上流側端部の上面側には、ペ
レットあるいは粉末状の被混練材料を混練室３に供給す
るための供給口１３が設けられ、この供給口１３には図
外のホッパーが接続される。チャンバ２の中間部には、
供給時に巻き込まれた及び混練中に発生したガスを混練
室３内から脱気するか、または、無機質フィラー等の添
加物の後添加を行うためのベント孔１４が形成されてい
る。また、チャンバ２の下流側端部の下面側には、溶融
した混練済み材料をチャンバ２の外部に排出するための
排出口１５が設けられており、本実施形態では、この排
出口１５がロータ４の径外方向のうち下方に向かって開
口した下方排出タイプを採用している。A supply port 13 for supplying pellets or a powdery material to be kneaded to the kneading chamber 3 is provided on the upper surface side of the upstream end of the chamber 2, and the supply port 13 is provided with a hopper (not shown). Is connected. In the middle part of the chamber 2,
A vent hole 14 is formed for degassing the gas caught during the supply and generated during the kneading from the kneading chamber 3 or for performing post-addition of an additive such as an inorganic filler. A discharge port 15 for discharging the melted and kneaded material to the outside of the chamber 2 is provided on the lower surface side of the downstream end of the chamber 2. In the present embodiment, the discharge port 15 is a rotor. 4, a downward discharge type that opens downward is adopted.

【００１４】更に、チャンバ２の材料搬送方向中途部に
は、上下一対のゲート板１６をロータ４の外周部に径外
側から接近又は離反させることで被混練材料の流量を調
整するゲート装置１７が設けられており、チャンバ２内
の混練室３は、このゲート装置１７の上流側と下流側と
でタンデムに並ぶ二つの混練ステージ３Ａ，３Ｂに区分
されている。このうち、ゲート装置１７の上流側の第一
ステージ３Ａ内に挿通されているロータ４の外周面に
は、上流側から順に、供給口１３からのペレットあるい
は粉末状の被混練材料を前方へフィードするスクリュー
翼よりなる第一フィード部１８と、その粉末状の被混練
材料に強力なせん断力を加えて同材料を混練溶融する第
一混練部１９とが、それぞれ形成されている。Further, a gate device 17 that adjusts the flow rate of the material to be kneaded by moving a pair of upper and lower gate plates 16 closer to or away from the outer peripheral portion of the rotor 4 from the outside in the material transfer direction of the chamber 2 is provided. The kneading chamber 3 in the chamber 2 is divided into two kneading stages 3A and 3B arranged in tandem on the upstream side and the downstream side of the gate device 17. Of these, pellets or powdery materials to be kneaded from the supply port 13 are fed forward from the upstream side to the outer peripheral surface of the rotor 4 inserted into the first stage 3A on the upstream side of the gate device 17. A first feed section 18 composed of screw blades and a first kneading section 19 for kneading and melting the powdery material to be kneaded by applying a strong shearing force thereto are formed.

【００１５】図１及び図２に示すように、本実施形態の
第一混練部１９は、ロータ４の回転により被混練材料を
下流側へ送る方向に捩じれた送り翼部１９Ａと、同回転
により被混練材料を上流側へ戻す方向に捩じれた戻し翼
部１９Ｂと、を備えている。この戻し翼部１９Ｂは送り
翼部１９Ａの下流側に配置され、これらの翼部１９Ａ，
１９Ｂは傾斜変換点１９Ｃ（図２参照）を境にして互い
に連続するように接続されている。なお、この実施形態
では両翼部１９Ａ，１９Ｂが連続する場合を例示した
が、両翼部１９Ａ，１９Ｂは傾斜変換点１９Ｃにおいて
周方向に分断された不連続なものであってもよい。As shown in FIGS. 1 and 2, the first kneading section 19 of the present embodiment comprises a feed wing section 19A twisted in a direction for feeding the material to be kneaded downstream by rotation of the rotor 4, and A return wing portion 19B twisted in a direction to return the material to be kneaded to the upstream side. This return wing portion 19B is arranged downstream of the feed wing portion 19A, and these wing portions 19A,
Reference numerals 19B are connected to each other so as to be continuous with each other at a slope conversion point 19C (see FIG. 2). In this embodiment, the case where the two wing portions 19A and 19B are continuous is illustrated. However, the two wing portions 19A and 19B may be discontinuous in the circumferential direction at the inclination conversion point 19C.

【００１６】他方、ゲート装置１７の下流側の第二ステ
ージ３Ｂ内に挿通されているロータ４の外周面には、第
一混練部１９で溶融された材料を排出口１５側へ強制的
に搬送するスクリュー翼よりなる第二フィード部２０が
形成されているが、第二の混練部は設けられていない。
もっとも、本発明は、第二フィード部２０の下流側に位
置するロータ４の外周面に第二混練部を形成した二段練
りタイプの連続混練機や、第二フィード部２０を形成せ
ずに第二混練部だけを形成した連続混練機にも適用でき
る。On the other hand, the material melted in the first kneading section 19 is forcibly conveyed to the discharge port 15 side on the outer peripheral surface of the rotor 4 inserted into the second stage 3B downstream of the gate device 17. A second feed section 20 made of screw blades is formed, but a second kneading section is not provided.
However, the present invention provides a two-stage kneading type continuous kneader in which the second kneading unit is formed on the outer peripheral surface of the rotor 4 located on the downstream side of the second feed unit 20 without forming the second feed unit 20. The present invention can also be applied to a continuous kneader in which only the second kneading section is formed.

【００１７】なお、本実施形態のロータ４は、混練翼や
スクリュー翼が周方向に１２０度の間隔をおいて形成さ
れた三翼タイプのものが採用されている。前記排出口１
５の下側には、連結管２１を介して図外のギアポンプ
（図示せず）が接続され、このギヤポンプの排出側に
は、図外のペレタイザ（造粒装置）その他の最終加工装
置が接続される。しかして、当該二軸連続混練機１とこ
れらギアポンプ及び造粒装置とから、高分子材料の連続
混練造粒システムが構成されるようになっている。The rotor 4 of this embodiment employs a three-blade type in which kneading blades and screw blades are formed at intervals of 120 degrees in the circumferential direction. The outlet 1
5 is connected to a gear pump (not shown) via a connecting pipe 21 via a connecting pipe 21, and a discharge side of the gear pump is connected to a pelletizer (granulator) and other final processing devices (not shown). Is done. Thus, the twin-screw continuous kneader 1 and the gear pump and the granulating device constitute a continuous kneading and granulating system of a polymer material.

【００１８】図１に示すように、ロータ４の下流側端部
はビスコシール２３を介してチャンバ２を貫通して突出
されており、その突出部分は、当該チャンバ２の下流側
端面を構成する縦壁部に固定した前記下流側軸受け７に
よってチャンバ２側に回転自在に支持されている。この
ビスコシール２３は、チャンバ２の下流側端面を貫通す
るようにして設けたシール筒部と、このシール筒部内に
摺動自在に挿通されかつロータ４の下流側端部外周面に
形成した逆ねじ部とを有し、この逆ねじ部はロータ４が
回転するとそのねじ山が上流側に移動する方向に形成さ
れている。As shown in FIG. 1, the downstream end of the rotor 4 projects through the chamber 2 via a visco seal 23, and the projected portion constitutes the downstream end surface of the chamber 2. The downstream bearing 7 fixed to the vertical wall portion rotatably supports the chamber 2 side. The visco-seal 23 has a seal tube portion provided to penetrate the downstream end surface of the chamber 2, and a reverse cylindrical member slidably inserted into the seal tube portion and formed on the outer peripheral surface of the downstream end portion of the rotor 4. The reverse thread is formed in a direction in which the thread moves upstream when the rotor 4 rotates.

【００１９】このため、混練室３からシール筒部内に侵
入してきた混練済み材料は、当該逆ねじ部の逆フィード
作用により上流側に戻され、これによってロータ４の回
転摺動部における混練済み材料のシールが確保される。
また、図１に示すように、各ロータ４の下流端部の外周
面には、同ロータ４の前記第一混練部１９で混練溶融さ
れた混練済み材料をその径外方向に掻き出すための排出
部２７が形成されている。この排出部２７は、混練室３
における排出口１５が形成されているロータ軸方向範囲
と概ね同長に形成されている。For this reason, the kneaded material that has entered the sealing cylinder from the kneading chamber 3 is returned to the upstream side by the reverse feeding action of the reverse screw portion, whereby the kneaded material in the rotary sliding portion of the rotor 4 is rotated. Seal is secured.
As shown in FIG. 1, the outer peripheral surface of the downstream end of each rotor 4 has a discharge for scraping the kneaded material that has been kneaded and melted in the first kneading section 19 of the rotor 4 in a radially outward direction. A part 27 is formed. The discharge unit 27 is provided in the kneading chamber 3
Are formed to have substantially the same length as the rotor axial direction range in which the discharge port 15 is formed.

【００２０】本実施形態のロータ４では、図２（ｃ）に
示すように、当該ロータ４の第一混練部１９を構成する
送り翼部１９Ａと戻し翼部１９Ｂのうち、送り翼部１９
Ａのロータ径方向に対する捩じれ角度αは従来の場合
（図２（ｂ）の場合）と同様に６０度に設定されている
が、戻し翼部１９Ｂのロータ軸方向に対する捩じれ角度
βは、従来の６０度よりも大きい７０度以上でかつ８０
度以下の範囲になるように設定されている。また、本実
施形態のロータ４では、送り翼部１９Ａの長さＬ１は約
１．５Ｄ（Ｄはチャンバ２の内径）に設定され、戻し翼
部１９Ｂの長さＬ２は約１．０Ｄに設定されている。も
っとも、本発明はかかる長さの混練部１９だけに適用さ
れるものではなく、送り翼部１９Ａについては０．５Ｄ
〜２．０Ｄの範囲、戻し翼部１９Ｂについても０．５Ｄ
〜２．０Ｄの範囲内であれば本発明を適用することがで
きる。In the rotor 4 of the present embodiment, as shown in FIG. 2C, the feed wing portion 19A and the return wing portion 19B constituting the first kneading portion 19 of the rotor 4 are provided.
The twist angle α of A in the rotor radial direction is set to 60 degrees as in the conventional case (case of FIG. 2B), but the twist angle β of the return wing portion 19B in the rotor axial direction is 70 degrees or more and more than 60 degrees and 80
It is set to be within the range below degrees. In the rotor 4 of the present embodiment, the length L1 of the feed wing portion 19A is set to about 1.5D (D is the inner diameter of the chamber 2), and the length L2 of the return wing portion 19B is set to about 1.0D. Have been. However, the present invention is not applied only to the kneading section 19 having such a length.
~ 2.0D, 0.5D for return wing 19B
The present invention can be applied as long as it is within the range of 2.0 D.

【００２１】その理由は、送り翼部１９Ａと戻し翼部１
９Ｂがともに０．５Ｄよりも小さい場合は、混練長さが
実質上短くなり過ぎて、有効な可塑化ないし混練が行え
なくなるからである。また、送り翼部１９Ａと戻し翼部
１９Ｂがともに２．０Ｄよりも大きい場合は、混練部に
おける発熱が大きくなり過ぎ、本発明の目的である低生
産量時における樹脂温度コントロールができなくなる恐
れがあり、また、戻し翼部１９Ｂの螺旋角が大きいため
その長さが長くなるとロープ４にかかる偏荷重の度合い
が大きくなり、ロープ４の破損の原因になる可能性があ
るからである。The reason is that the feed wing section 19A and the return wing section 1
When both 9B are smaller than 0.5D, the kneading length becomes substantially too short, and effective plasticization or kneading cannot be performed. When both the feed wing portion 19A and the return wing portion 19B are larger than 2.0D, the heat generation in the kneading portion becomes too large, and there is a possibility that the resin temperature control at the time of low production which is the object of the present invention may not be possible. Also, because the spiral angle of the return wing portion 19B is large, if the length is long, the degree of the unbalanced load applied to the rope 4 increases, which may cause damage to the rope 4.

【００２２】なお、被混練材の混練品質の観点から或い
は被混練材の粘度により、送り翼部１９Ａ及び戻し翼部
１９Ｂの長さは上記範囲内で最適な長さになるように設
定することができる。上記構成に係る二軸連続混練機１
による被混練材料の混練に際しては、まず、ペレットあ
るいは粉末状の被混練材料（無機質フィラーを含んでも
よい）を供給口１３から投入する。すると、その材料
は、第一ステージ３Ａ内において、第一フィード部１８
で下流側にフィードされるとともに混練部１９のチップ
部を通過するときに大きなせん断力を受けて自己発熱に
より溶融する。The lengths of the feed wing portion 19A and the return wing portion 19B are set to be optimal within the above range from the viewpoint of the kneading quality of the kneaded material or the viscosity of the kneaded material. Can be. Biaxial continuous kneader 1 according to the above configuration
At the time of kneading the material to be kneaded, first, a pellet or powdered material to be kneaded (which may contain an inorganic filler) is introduced from the supply port 13. Then, the material is supplied to the first feed section 18 in the first stage 3A.
And melts by self-heating by receiving a large shearing force when passing through the chip portion of the kneading section 19.

【００２３】その後、溶融した被混練材料は、ゲート装
置１７で混練度（温度）調整されながら、第二ステージ
３Ｂの第二フィード部２０に至り、同フィード部２０の
スクリュー作用によって排出部２７に搬送される。そし
て、この排出部２７に到達した混練済み材料は、その排
出部２７によって下方に掻き出されてその下方に開口し
ている排出口１５からチャンバ２の外部に排出される。
このさい、本実施形態では、戻し翼部１９Ｂの捩じれ角
度βが送り翼部１９Ａの捩じれ角度α（６０度）よりも
小さくなっているので、チャンバ２内の第一混練部１９
において、戻し翼部１９Ｂによる戻し力の方が送り翼部
１９Ａによる送り力よりもやや小さい状態で被混練材料
が混練されることになる。Thereafter, the molten material to be kneaded reaches the second feed portion 20 of the second stage 3B while the kneading degree (temperature) is adjusted by the gate device 17, and the melted material to the discharge portion 27 by the screw action of the feed portion 20. Conveyed. The kneaded material that has reached the discharge portion 27 is scraped downward by the discharge portion 27 and discharged to the outside of the chamber 2 from the discharge port 15 opened below.
At this time, in the present embodiment, the twist angle β of the return wing portion 19B is smaller than the twist angle α (60 degrees) of the feed wing portion 19A.
In the above, the material to be kneaded is kneaded in a state where the return force by the return blade 19B is slightly smaller than the feed force by the feed blade 19A.

【００２４】従って、被混練材料が必要以上にチャンバ
２内の第一混練部１９の周囲に滞留し続けることがな
く、このため、被混練材料の処理量の低下に伴って同材
料が過度に昇温するのが有効に防止され、同じロータ回
転数の下において適切に混練できる被混練材料の処理量
の範囲が従来より広範囲になる。このため、本実施形態
の連続混練機１によれば、従来では減速比を変更する必
要があった大幅な処理量の減少に際してもその減速比を
変更せずに対応することができ、連続混練機１による作
業効率を向上することができる。Therefore, the material to be kneaded does not continue to stay around the first kneading portion 19 in the chamber 2 more than necessary. For this reason, the material to be kneaded becomes excessive with the decrease in the throughput of the material to be kneaded. The temperature rise is effectively prevented, and the range of the amount of the material to be kneaded that can be properly kneaded under the same rotor speed becomes wider than before. For this reason, according to the continuous kneading machine 1 of the present embodiment, it is possible to cope with a drastic reduction of the processing amount, which had conventionally required to change the reduction ratio, without changing the reduction ratio. Work efficiency by the machine 1 can be improved.

【００２５】また、同じロータ回転数の下で適切に混練
できる被混練材料の処理量の範囲が広範囲に設定できる
ため、場合によっては複数の減速比の設定やその切り換
えのためのクラッチ機構を省略することもでき、この点
で設備コストを低減できるという利点もある。図４は、
本発明の第二の実施形態を示している。この実施形態
は、ゲート装置１７を有しないタイプの二軸連続押出機
（例えば、（株）神戸製鋼所のＫＣＭやＮＣＭシリー
ズ）に本発明を採用した場合を示している。Also, since the range of the amount of the material to be kneaded which can be appropriately kneaded under the same rotation speed of the rotor can be set in a wide range, a clutch mechanism for setting a plurality of reduction ratios and switching between them can be omitted in some cases. In this respect, there is an advantage that the equipment cost can be reduced. FIG.
7 shows a second embodiment of the present invention. This embodiment shows a case where the present invention is applied to a twin-screw continuous extruder of a type having no gate device 17 (for example, KCM and NCM series of Kobe Steel Ltd.).

【００２６】このため、第一実施形態（図１）と本実施
形態（図４）とでは、前者では混練室３がゲート装置１
７で２ステージに別れているが、後者では１ステージで
ある点で相違する。また、この実施形態では、混練度合
いの調整手段として、ギアポンプではなく、排出口１５
に枢着した蓋部材３８とこの蓋部材３８を揺動させるシ
リンダ３９とからなるフラッパーオリフィス４０を採用
している。ただし、第一の実施形態の２ステージタイプ
の二軸連続混練機１（図１）に上記フラッパーオリフィ
ス４０を採用することもでき、また、本実施形態の二軸
連続混練機（図４）にギアポンプを接続することもでき
る。Therefore, in the first embodiment (FIG. 1) and the present embodiment (FIG. 4), the kneading chamber 3 is the gate device 1 in the former.
7 is divided into two stages, but the latter is different in that it is one stage. In this embodiment, as a means for adjusting the degree of kneading, not a gear pump but an outlet 15
And a flapper orifice 40 comprising a lid member 38 pivotally attached to the cylinder and a cylinder 39 for swinging the lid member 38. However, the flapper orifice 40 can be employed in the two-stage continuous kneader 1 of the first embodiment (FIG. 1), and the twin-screw continuous kneader of the present embodiment (FIG. 4). A gear pump can also be connected.

【００２７】なお、その他の基本的構造は第一の実施形
態とほぼ同様であるので、図面に同一符号を付して詳細
な構造説明を省略する。以上、本発明の各実施の形態を
説明したが、これらの実施の形態は例示的なものであっ
て限定的なものではない。本発明の技術的範囲は冒頭の
特許請求の範囲により決定され、その意味に入るすべて
の態様は本発明の範囲に含まれる。例えば、ロータ４の
翼数は一つ以上あれば足り、本発明は三翼タイプのロー
タ４に限定されるものではない。また、上記した各実施
形態では、すべて一対のロータ４が異方向回転する二軸
連続混練機１を例示しているが、本発明はロータ４の回
転方向や本数とは関係なく採用できる。Since the other basic structure is almost the same as that of the first embodiment, the same reference numerals are given to the drawings and the detailed description of the structure is omitted. Although the embodiments of the present invention have been described above, these embodiments are illustrative and not restrictive. The technical scope of the present invention is determined by the appended claims, and all embodiments falling within the meaning are included in the scope of the present invention. For example, it is sufficient that the rotor 4 has one or more blades, and the present invention is not limited to the three-wing type rotor 4. Further, in each of the embodiments described above, the twin-screw continuous kneader 1 in which the pair of rotors 4 rotate in different directions is exemplified, but the present invention can be adopted regardless of the rotation direction and the number of the rotors 4.

【００２８】すなわち、本発明は、一対のロータが同方
向に回転する二軸連続混練機や、１ロータの単軸混練押
出機及び３ロータ以上の多軸混練押出機にも採用するこ
とができる。That is, the present invention can be applied to a twin-screw continuous kneader in which a pair of rotors rotate in the same direction, a single-rotor single-screw kneading extruder, and a multi-screw kneading extruder having three or more rotors. .

【００２９】[0029]

【実施例】次に、本発明の効果を実証するための実験例
について説明する。この実験は、上記した第一の実施形
態に係る二軸連続混練機１を用いて実際に被混練材料を
試験練りし、その際、排出口１５での樹脂温度を測定す
ることによって行った。なお、この試験練りの共通条件
は次の通りである。 使用混練機 ： （株）神戸製鋼所製のＬＣＭ５０（図１） 期待処理量 ： ５０ｋｇ／ｈ ロータ回転数 ： ５００ｒｐｍ 温度の測定点 ： 図１の排出口１５ 送り翼部の捩じれ角度 ： α＝６０度 送り翼部の長さ ： １．５Ｄ 戻し翼部の長さ ： １．０Ｄ 被混練材料の材質 ： ＨＤＰＥ（ＭＩ＝０．０５） 上記共通条件の下で、送り翼部の捩じれ角度βを６０度
（従来の図２（ｂ）の場合）から、６５度、７０度、７
５度、８０度と漸次変化させて行き、そのそれぞれの捩
じれ角度βの場合において、被混練材料の生産量の変化
が樹脂温度に及ぼす影響を調査した。Next, an experimental example for verifying the effect of the present invention will be described. This experiment was carried out by actually kneading the material to be kneaded using the twin-screw continuous kneader 1 according to the first embodiment, and measuring the resin temperature at the discharge port 15 at that time. The common conditions for the test kneading are as follows. Kneading machine used: LCM50 manufactured by Kobe Steel, Ltd. (FIG. 1) Expected throughput: 50 kg / h Rotor speed: 500 rpm Measurement point of temperature: Discharge port 15 in FIG. 1 Torsion angle of feed wing: α = 60 Degree Length of feed wing: 1.5D Length of return wing: 1.0D Material of material to be kneaded: HDPE (MI = 0.05) Under the above common conditions, the twist angle β of the feed wing is calculated. From 60 degrees (in the case of the conventional FIG. 2B), 65 degrees, 70 degrees, 7 degrees
The angle was gradually changed to 5 degrees and 80 degrees, and the effect of the change in the production amount of the material to be kneaded on the resin temperature was investigated for each of the twist angles β.

【００３０】その結果が、図３のグラフである。なお、
このグラフにおいて、−◇−はβが６０度の場合、−△
−はβが６５度の場合、−▲−はβが７０度の場合、−
○−はβが７５度の場合、−●−はβが８０度の場合を
それぞれ示している。この図３の測定結果から明らかな
ように、戻し翼部１９Ｂの捩じれ角度βが従来の６０度
の場合（−◇−）やこれに近い６５度の場合（−△−）
には、生産量を２５ｋｇ／ｈ（期待処理量の５０％）ま
で落とすと、樹脂温度が３００°Ｃ以上になってＨＤＰ
Ｅの劣化の恐れが生じる温度域になってしまう。The result is a graph of FIG. In addition,
In this graph,-◇-indicates that when β is 60 degrees,-△
-Is when β is 65 degrees,-▲-is when β is 70 degrees,-
−- indicates that β is 75 degrees, and-●-indicates that β is 80 degrees. As is clear from the measurement results of FIG. 3, the torsion angle β of the return wing portion 19B is 60 degrees (-◇-) or 65 degrees (-△-) close to this.
When the production rate drops to 25 kg / h (50% of the expected processing rate), the resin temperature rises to 300 ° C.
The temperature will be in a temperature range in which E may be deteriorated.

【００３１】これに対して、戻し翼部１９Ｂの捩じれ角
度βが７０度の場合（−▲−）、７５度の場合（−○
−）、及び８０度の場合（−●−）には、生産量が約１
５〜７５ｋｇ／ｈ（期待処理量の３０〜１２５％）の広
範囲に渡って適正なＨＤＰＥの溶融温度で混練すること
ができる。以上から、送り翼部１９Ａの捩じれ角度αが
６０度に設定されている通常のロータ４の場合、戻し翼
部１９Ｂの捩じれ角度βを７０〜８０度に設定しておけ
ば、同じロータ回転数の下で被混練材料の処理量を期待
処理量の半分以下に低下させても、過昇温を招来せずに
被混練材料を適切に混練できるようになる。On the other hand, when the torsion angle β of the return wing portion 19B is 70 degrees (-▲-) and 75 degrees (-○).
-) And at 80 degrees (-●-), the production amount is about 1
Kneading can be performed at a proper HDPE melting temperature over a wide range of 5 to 75 kg / h (30 to 125% of an expected processing amount). From the above, in the case of the normal rotor 4 in which the twist angle α of the feed wing portion 19A is set to 60 degrees, if the twist angle β of the return wing portion 19B is set to 70 to 80 degrees, the same rotor rotation speed is obtained. Even if the processing amount of the material to be kneaded is reduced to half or less of the expected processing amount under the above conditions, the material to be kneaded can be appropriately kneaded without causing excessive temperature rise.

【００３２】[0032]

【発明の効果】以上説明したように、本発明によれば、
同じロータ回転数の下で適切に混練できる被混練材料の
処理量の範囲がより広範囲になるので、比較的大幅な処
理量の変更に際してもロータ回転数を変化させる必要が
なくなり、連続混練機による作業効率を向上することが
できる。As described above, according to the present invention,
Since the range of the processing amount of the material to be kneaded that can be appropriately kneaded under the same rotor rotation speed becomes wider, it is not necessary to change the rotor rotation speed even when the processing amount is changed relatively large, and the continuous kneading machine is used. Work efficiency can be improved.

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

【図１】第一の実施形態に係る二軸連続混練機の全体構
造を示す側面断面図である。FIG. 1 is a side sectional view showing an entire structure of a twin-screw continuous kneader according to a first embodiment.

【図２】（ａ）はロータの側面図、（ｂ）は従来の混練
部の展開平面図、（ｃ）は本発明の混練部の展開平面図
である。2A is a side view of a rotor, FIG. 2B is a developed plan view of a conventional kneading section, and FIG. 2C is a developed plan view of a kneading section of the present invention.

【図３】戻し翼部の捩じれ角度を変化させた場合におけ
る生産量と樹脂温度との関係を示すグラフである。FIG. 3 is a graph showing a relationship between a production amount and a resin temperature when a twist angle of a return wing is changed.

【図４】第一の実施形態に係る二軸連続混練機の全体構
造を示す側面断面図である。FIG. 4 is a side sectional view showing the entire structure of the twin-screw continuous kneader according to the first embodiment.

【符号の説明】[Explanation of symbols]

１ （二軸）連続混練機 ２ チャンバ ４ ロータ １３ 供給口 １５ 排出口 １８ （第一）フィード部 １９ （第一）混練部 １９Ａ 送り翼部 １９Ｂ 戻し翼部 α 捩じれ角度 β 捩じれ角度 Reference Signs List 1 (biaxial) continuous kneader 2 chamber 4 rotor 13 supply port 15 discharge port 18 (first) feed section 19 (first) kneading section 19A feed wing section 19B return wing section α twist angle β twist angle

───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 達也 兵庫県高砂市荒井町新浜２丁目３番１号 株式会社神戸製鋼所高砂製作所内 (72)発明者 柏 ▲真▼彦 兵庫県高砂市荒井町新浜２丁目３番１号 株式会社神戸製鋼所高砂製作所内 (72)発明者 笠井 重宏 兵庫県高砂市荒井町新浜２丁目３番１号 株式会社神戸製鋼所高砂製作所内 Ｆターム(参考） 4F201 BA01 BC01 BC02 BC12 BK13 BK14 BK40 BK46 BK52 BK54 4G078 AA03 AA10 AA26 AB01 AB06 BA01 BA07 DA09 DA28 DB03 EA10  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuya Tanaka 2-3-1 Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside Kobe Steel, Ltd. Takasago Works (72) Inventor Kashiwa ▲ Mashiko hikohiko Araimachi, Takasago City, Hyogo Prefecture No. 2-3-1, Kobe Steel Works, Ltd. Takasago Works (72) Inventor Shigehiro Kasai 2-3-1, Shinai, Araimachi, Takasago City, Hyogo Prefecture Kobe Steel Works, Takasago Works F-term (reference) 4F201 BA01 BC01 BC02 BC12 BK13 BK14 BK40 BK46 BK52 BK54 4G078 AA03 AA10 AA26 AB01 AB06 BA01 BA07 DA09 DA28 DB03 EA10

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 上流側端部に供給口（１３）を有しかつ
下流側端部に排出口（１５）を有するチャンバ（２）内
に、被混練材料のフィード部（１８）と混練部（１９）
を外周面に有するロータ（４）が回転自在に挿通され、
この混練部（１９）が、被混練材料を下流側へ送る方向
に捩じれた送り翼部（１９Ａ）と、この送り翼部（１９
Ａ）の下流側に配置されかつ被混練材料を上流側へ戻す
方向に捩じれた戻し翼部（１９Ｂ）とを備えている連続
混練機において、 前記戻し翼部（１９Ｂ）のロータ径方向に対する捩じれ
角度（β）が前記送り翼部（１９Ａ）のロータ径方向に
対する捩じれ角度（α）よりも小さい値に設定されてい
ることを特徴とする連続混練機。1. A feed section (18) for a material to be kneaded and a kneading section in a chamber (2) having a supply port (13) at an upstream end and a discharge port (15) at a downstream end. (19)
Is rotatably inserted through the rotor (4) having
The kneading section (19) includes a feed wing section (19A) twisted in a direction for feeding the material to be kneaded downstream, and a feed wing section (19A).
A) is provided downstream of (A) and has a return wing portion (19B) twisted in a direction of returning the material to be kneaded to the upstream side, wherein the return wing portion (19B) is twisted in the rotor radial direction. A continuous kneader, wherein an angle (β) is set to a value smaller than a twist angle (α) of the feed blade portion (19A) with respect to a rotor radial direction. 【請求項２】 戻し翼部（１９Ｂ）のロータ径方向に対
する捩じれ角度（β）が６５度よりも大きくかつ８５度
よりも小さい値に設定されている請求項１に記載の連続
混練機。2. The continuous kneader according to claim 1, wherein a twist angle (β) of the return blade portion (19B) with respect to the rotor radial direction is set to a value larger than 65 degrees and smaller than 85 degrees. 【請求項３】 戻し翼部（１９Ｂ）のロータ径方向に対
する捩じれ角度（β）が７０度以上でかつ８０度以下に
設定されている請求項２に記載の連続混練機。3. The continuous kneader according to claim 2, wherein the twist angle (β) of the return blade portion (19B) with respect to the radial direction of the rotor is set to 70 degrees or more and 80 degrees or less. 【請求項４】 被混練材料のフィード部（１８）と混練
部（１９）を外周面に備え、その混練部（１９）が被混
練材料を下流側へ送る方向に捩じれた送り翼部（１９
Ａ）と、この送り翼部（１９Ａ）の下流側に配置されか
つ被混練材料を上流側へ戻す方向に捩じれた戻し翼部
（１９Ｂ）とを備えている連続混練機のロータにおい
て、 前記戻し翼部（１９Ｂ）のロータ径方向に対する捩じれ
角度（β）が前記送り翼部（１９Ａ）のロータ径方向に
対する捩じれ角度（α）よりも小さい値に設定されてい
ることを特徴とする連続混練機のロータ。4. A feed blade section (19) having an outer peripheral surface provided with a feed section (18) and a kneading section (19) for a material to be kneaded, wherein the kneading section (19) is twisted in a direction for feeding the material to be kneaded downstream.
A) and a return wing portion (19B) disposed downstream of the feed wing portion (19A) and twisted in a direction of returning the material to be kneaded to the upstream side. A continuous kneader wherein a twist angle (β) of the blade (19B) with respect to the rotor radial direction is set to a value smaller than a twist angle (α) of the feed blade (19A) with respect to the rotor radial direction. Rotor. 【請求項５】 戻し翼部（１９Ｂ）のロータ径方向に対
する捩じれ角度（β）が請求項２又は３に記載の範囲に
設定されている請求項４に記載の連続混練機のロータ。5. The rotor of the continuous kneading machine according to claim 4, wherein the twist angle (β) of the return blade portion (19B) with respect to the rotor radial direction is set in the range described in claim 2 or 3. 【請求項６】 チャンバ（２）の上流側端部に設けた供
給口（１３）から供給した被混練材料を、同チャンバ
（２）内に回転自在に設けたロータ（４）のフィード部
（１８）で当該チャンバ（２）の下流側へ搬送するとと
もに、そのロータ（４）の軸方向中途部に形成されかつ
送り翼部（１９Ａ）とその下流側の戻し翼部（１９Ｂ）
とを有する混練部（１９）で前記被混練材料に剪断を加
えて混練するようにした連続混練機による混練方法にお
いて、 前記戻し翼部（１９Ｂ）による被混練材料に対する戻し
力を前記送り翼部（１９Ａ）による被混練材料に対する
送り力よりも小さくした状態で、当該被混練材料を前記
混練部（１９）において混練することを特徴とする連続
混練機による混練方法。6. A kneading material supplied from a supply port (13) provided at an upstream end of the chamber (2) is fed to a feed section (4) of a rotor (4) rotatably provided in the chamber (2). In 18), it is conveyed to the downstream side of the chamber (2), and is formed at an intermediate portion in the axial direction of the rotor (4) and has a feed wing (19A) and a return wing (19B) downstream thereof.
In a kneading method using a continuous kneader configured to apply a shear to the kneaded material in a kneading section (19) having a kneading portion, a return force to the kneaded material by the return wing portion (19B) is applied to the feed wing portion. A kneading method using a continuous kneader, wherein the material to be kneaded is kneaded in the kneading section (19) in a state where the feeding force to the material to be kneaded is reduced by (19A). 【請求項７】 戻し翼部（１９Ｂ）のロータ径方向に対
する捩じれ角度（β）を送り翼部（１９Ａ）のロータ径
方向に対する捩じれ角度（α）よりも小さくすることに
より、混練部（１９）における被混練材料に対する戻し
力をその送り力よりも小さくしている請求項６に記載の
連続混練機による混練方法。7. The kneading section (19) by making the twist angle (β) of the return blade section (19B) with respect to the rotor radial direction smaller than the twist angle (α) of the feed blade section (19A) with respect to the rotor radial direction. The kneading method using a continuous kneading machine according to claim 6, wherein the return force to the material to be kneaded in (1) is smaller than the feeding force. 【請求項８】 戻し翼部（１９Ｂ）のロータ径方向に対
する捩じれ角度（β）が請求項２又は３に記載の範囲に
設定されている請求項７に記載の連続混練機による混練
方法。8. The kneading method according to claim 7, wherein the twist angle (β) of the return blade portion (19B) with respect to the radial direction of the rotor is set in the range described in claim 2 or 3.
JP18042099A 1999-06-25 1999-06-25 Continuous kneader, its kneading method and rotor of continuous kneader Expired - Lifetime JP3365747B2 (en)

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WO2012165469A1 (en) 2011-05-30 2012-12-06 株式会社日本製鋼所 Material kneading device and material kneading method
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US7637650B2 (en) 2003-06-17 2009-12-29 Kobe Steel, Ltd. Continuous mixer and operating method thereof
WO2009057753A1 (en) * 2007-11-02 2009-05-07 Kabushiki Kaisha Kobe Seiko Sho Mechanism for regulating kneadability, extruder, continuous kneading machine, method for regulating kneadability and kneading method
JP2009113246A (en) * 2007-11-02 2009-05-28 Kobe Steel Ltd Kneading adjusting mechanism, extruder, continuous kneader and method for adjusting degree of kneading
US9463581B2 (en) 2007-11-02 2016-10-11 Kobe Steel, Ltd. Kneading degree adjusting mechanism, extruder, continuous mixer, kneading degree adjusting method, and kneading method
JP2011509197A (en) * 2008-01-03 2011-03-24 ウェンガー マニュファクチュアリング アイエヌシー． Extruder with variable intermediate barrel flow control and adjacent high strength mixing assembly
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US10576661B2 (en) 2011-05-30 2020-03-03 The Japan Steel Works, Ltd. Material kneading apparatus and material kneading method
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