JP2006341489A - Continuous kneader - Google Patents

Continuous kneader Download PDF

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JP2006341489A
JP2006341489A JP2005169362A JP2005169362A JP2006341489A JP 2006341489 A JP2006341489 A JP 2006341489A JP 2005169362 A JP2005169362 A JP 2005169362A JP 2005169362 A JP2005169362 A JP 2005169362A JP 2006341489 A JP2006341489 A JP 2006341489A
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Prior art keywords
kneading
rotor
blade
kneading apparatus
continuous
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JP4781725B2 (en
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Takashi Moribe
高司 森部
Koji Shintani
幸司 新谷
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/405—Intermeshing co-rotating screws

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous kneader which can improve kneading quality by improving shearing properties while securing an extrusion capacity for a material to be kneaded. <P>SOLUTION: In a twin-screw kneading extruder 1 comprising a kneading rotor 7 which is incorporated in a screw set 3 in a barrel 2 and applies shearing force to the material to be kneaded in the clearance between it and a chamber inner wall surface to knead the material, the rotor 7 is provided with a long blade 12 twisted continuously in the extrusion direction and one or more short blades 13a and 13b extending from the shaft end of a rotor main body 11 on the periphery of the rotor main body 11. The lengths of the short blades 13a and 13b are shorter than half of the length of the rotor main body 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ゴムやプラスチック等の物性を向上させるため、一軸（単軸）あるいは二軸混練押出機等により連続的に押出しつつ対象材料（被混練物）を混練する連続混練装置に関する。   The present invention relates to a continuous kneading apparatus for kneading a target material (a material to be kneaded) while continuously extruding it with a single screw (single screw) or a twin screw kneading extruder in order to improve physical properties such as rubber and plastic.

ゴム等の被混練物を混練する装置としては、主としてバッチ式の混練機が知られている。例えばゴムを混練する場合には、原料ゴムと配合剤等をバッチ式混練機に投入して混練するが、混練作用による発熱が過剰となるとゴム品質の劣化を招く。   As a device for kneading a material to be kneaded such as rubber, a batch-type kneader is mainly known. For example, when rubber is kneaded, raw rubber and a compounding agent are charged into a batch-type kneader and kneaded. However, excessive heat generation due to the kneading action causes deterioration of rubber quality.

そこで、現状の混練作業では、混練中の被混練物の温度を監視して、その温度が被混練物を劣化させる前の所定の温度（例えば、ゴムにおいては約１５０℃）まで上昇した時点で混練機から被混練物を排出し、その被混練物を冷却した後、再び混練機に投入するという作業を適当な回数、繰り返すようにしている。   Therefore, in the current kneading operation, the temperature of the material to be kneaded during kneading is monitored, and when the temperature rises to a predetermined temperature (for example, about 150 ° C. for rubber) before the material to be kneaded is deteriorated. The operation of discharging the material to be kneaded from the kneader, cooling the material to be kneaded, and charging it again into the kneader is repeated an appropriate number of times.

この繰り返し行われる混練工程を再練（リミル）工程と呼ぶが、本工程は多大の時間を要するので、タイヤ等の製品の生産性を低下させる要因になる。このため、被混練物の発熱量が小さく、一方良好な混練性能、分散性能を有する混練装置が要望されている。   This repeated kneading step is called a re-milling (re-milling) step, but since this step takes a lot of time, it becomes a factor of reducing the productivity of products such as tires. For this reason, there is a demand for a kneading apparatus having a small calorific value of the material to be kneaded while having good kneading performance and dispersion performance.

これに対して、下記特許文献１や特許文献２に記載された技術は、樹脂や高粘性のゴム等の被混練物を連続して混練することができる一軸及び二軸混練押出機等の連続混練装置に関するものである。   On the other hand, the techniques described in Patent Document 1 and Patent Document 2 below are continuous uniaxial and biaxial kneading extruders and the like that can continuously knead materials to be kneaded such as resin and high-viscosity rubber. The present invention relates to a kneading apparatus.

例えば、二軸混練押出機は、二本の回転シャフトの外周に、混練ロータやニーディングディスク、スクリュー等のセグメントが１個又は複数個、組み合わされて構成されたもので、これらを筒状のチャンバ内で同方向あるいは異方向に回転させることにより、連続的に供給されたゴムや樹脂等の被混練物を搬送及び混練する装置である。   For example, a twin-screw kneading extruder is configured by combining one or a plurality of segments such as a kneading rotor, a kneading disk, and a screw on the outer periphery of two rotating shafts. It is an apparatus that conveys and kneads a material to be kneaded such as rubber or resin continuously supplied by rotating in the same direction or different directions in the chamber.

この二軸混練押出機を用いて、ゴム等の混練を行う場合には、先ず、ゴムあるいは各種配合剤などを添加したゴム組成物からなる被混練物を二軸混練押出機のフィード部へ供給する。フィード部では、被混練物は軸方向の下流側にある混練部へ加熱、押出しされる。   When kneading rubber or the like using this twin-screw kneading extruder, first, a material to be kneaded made of a rubber composition to which rubber or various compounding agents are added is supplied to the feed section of the twin-screw kneading extruder. To do. In the feed section, the material to be kneaded is heated and extruded to the kneading section on the downstream side in the axial direction.

次に、混練部において、混練ロータ等により剪断力を付与されて混練される。混練ロータは、そのロータ本体の外表面に翼部を備え、この翼部の先端とチャンバ内壁面との間に形成される間隙、いわゆるチップクリアランスで被混練物に強い剪断力を付与する。   Next, in the kneading part, a shearing force is applied by a kneading rotor or the like to knead. The kneading rotor includes a blade portion on the outer surface of the rotor body, and applies a strong shearing force to the material to be kneaded through a gap formed between the tip of the blade portion and the inner wall surface of the chamber, so-called chip clearance.

そして、混練部の下流側に位置する押出部において相対向するスクリューによって混練済みの材料が次工程に搬出される。
特願２００３−３８１８８７号 特願２００４−２０６８２６号 Then, the kneaded material is carried out to the next process by the screws opposed to each other in the extruding unit located on the downstream side of the kneading unit.
Japanese Patent Application No. 2003-381887 Japanese Patent Application No. 2004-206826

しかしながら、上述した連続混練装置では、ゴム等の高粘性混練物は剪断発熱が大きく、連続混練装置の冷却性能が十分でないため高温になり、混練性能が低下してゴム品質の劣化等を招来するという虞があった。   However, in the above-described continuous kneading apparatus, a high viscosity kneaded material such as rubber has a large heat generation due to shearing, and the cooling performance of the continuous kneading apparatus is insufficient, resulting in a high temperature, resulting in a decrease in kneading performance and deterioration of rubber quality. There was a fear.

一方、温度上昇を防ぐため、回転シャフトの回転数を低下させたり、又は上述したバッチ式混練機のように、一旦ゴムを排出し再練りする等を行うと生産性が低下するという問題点がある。また、連続的に押出しつつ混練に必要な滞留時間を確保しようとすると必然的に装置の長さが大となる欠点もあった。   On the other hand, in order to prevent temperature rise, there is a problem that productivity is lowered when the number of rotations of the rotating shaft is reduced or rubber is once discharged and re-kneaded as in the batch kneader described above. is there. In addition, there is a drawback that the length of the apparatus is inevitably increased when trying to secure a residence time necessary for kneading while continuously extruding.

本発明は、上記状況に鑑みてなされたものであり、被混練物の押出し能力を確保しつつ剪断性を上げて混練品質の向上が図れる連続混練装置を提供することを目的とする。   The present invention has been made in view of the above situation, and an object of the present invention is to provide a continuous kneading apparatus capable of improving the kneading quality by increasing the shearing property while ensuring the extrusion ability of the material to be kneaded.

上記課題を解決する本発明に係る連続混練装置は、筒状のチャンバを有したバレルと、前記チャンバ内で回転することで被混練物を下流側に押し出すスクリューセットと、前記スクリューセットに組み込まれ前記チャンバ内壁面との間の間隙で剪断を付与し被混練物の混練を行う混練ロータと、を備えた連続混練装置において、前記混練ロータは、ロータ本体の外周に、押出方向へ連続的に捻れた長翼とロータ本体軸端より延びる一個以上の短翼とを備えると共に、前記短翼の長さをロータ本体の長さの１／２よりも短くしてなることを特徴とする。   A continuous kneading apparatus according to the present invention that solves the above problems is incorporated in a barrel having a cylindrical chamber, a screw set that pushes the material to be kneaded downstream by rotating in the chamber, and the screw set. And a kneading rotor for kneading the material to be kneaded by applying shear at a gap between the inner wall surface of the chamber and the kneading rotor continuously on the outer periphery of the rotor body in the extrusion direction. A twisted long blade and one or more short blades extending from the shaft end of the rotor body are provided, and the length of the short blade is shorter than ½ of the length of the rotor body.

また、前記長翼のロータ本体軸端側を切欠き、該長翼切欠き部の軸方向長さより前記短翼の長さを長くしたことを特徴とする。   Further, the long blade has a notch on the rotor body shaft end side, and the length of the short blade is made longer than the axial length of the long blade notch.

また、前記長翼のロータ本体軸線に対する捻れ角を３０〜６０°に設定したことを特徴とする。   Further, the twist angle of the long blade with respect to the rotor body axis is set to 30 to 60 °.

また、前記短翼は押出方向上流側の第１短翼と押出方向下流側の第２短翼を有し、これら第１短翼と第２短翼の少なくとも一方のロータ本体軸線に対する捻れ角を３０〜６０°に設定したことを特徴とする。   The short blade has a first short blade on the upstream side in the extrusion direction and a second short blade on the downstream side in the extrusion direction, and has a twist angle with respect to the rotor main body axis of at least one of the first short blade and the second short blade. It is characterized by being set to 30 to 60 °.

また、前記第２短翼の捻れ角を反転させたことを特徴とする。   Further, the twist angle of the second short blade is reversed.

また、前記混練ロータにおけるロータ本体外径Ｄ１と翼径Ｄ２との比であるＤ１／Ｄ２が０．３５以上であることを特徴とする。   In the kneading rotor, D1 / D2, which is a ratio of the rotor body outer diameter D1 and the blade diameter D2, is 0.35 or more.

また、前記混練ロータの上流あるいは下流側の少なくとも一方に、不連続に断面形状が変化するニーディングディスクを配置したことを特徴とする。   Further, a kneading disk having a discontinuous change in cross-sectional shape is arranged at least on the upstream side or downstream side of the kneading rotor.

また、前記ニーディングディスクは被混練物の押出能力のない中立翼を有することを特徴とする。   Further, the kneading disk has a neutral blade having no ability to extrude the material to be kneaded.

また、前記混練ロータはスクリューセット上に連続的あるいは断続的に複数個配置されることを特徴とする。   The kneading rotor may be arranged on a screw set continuously or intermittently.

また、前記混練ロータとニーディングディスクの組合せはスクリューセット上に連続的あるいは断続的に複数箇所設置されることを特徴とする。   In addition, the combination of the kneading rotor and the kneading disk may be installed on a screw set at a plurality of locations continuously or intermittently.

また、前記連続混練装置は一軸混練押出機であることを特徴とする。   The continuous kneading apparatus is a single screw kneading extruder.

また、前記連続混練装置は二軸混練押出機であることを特徴とする。   The continuous kneading apparatus is a twin-screw kneading extruder.

また、前記連続混練装置はゴム又はゴム系組成物を混練することを特徴とする。   The continuous kneader is characterized by kneading rubber or a rubber-based composition.

本発明に係る連続混練装置によれば、混練ロータは、ロータ本体の外周に、押出方向へ連続的に捻れた長翼とロータ本体軸端より延びる一個以上の短翼とを備えると共に、前記短翼の長さをロータ本体の長さの１／２よりも短くしてなるので、被混練物の押出し能力を確保しつつ剪断性を上げて混練品質の向上が図れる。   According to the continuous kneading apparatus according to the present invention, the kneading rotor includes, on the outer periphery of the rotor body, long blades continuously twisted in the extrusion direction and one or more short blades extending from the rotor body shaft end. Since the length of the blade is shorter than 1/2 of the length of the rotor body, it is possible to improve the kneading quality by increasing the shearing property while ensuring the extrusion ability of the material to be kneaded.

以下、本発明に係る連続混練装置を実施例により図面を用いて詳細に説明する。   Hereinafter, the continuous kneading apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

図１は本発明の実施例１を示す混練ロータの展開図、図２は翼捻れ角と軸方向圧力勾配との関係を示すグラフ、図３は二軸混練押出機の平断面図である。   FIG. 1 is a development view of a kneading rotor showing Example 1 of the present invention, FIG. 2 is a graph showing the relationship between blade twist angle and axial pressure gradient, and FIG. 3 is a plan sectional view of a twin-screw kneading extruder.

図３に示すように、二軸混練押出機１は、バレル２の内部に平行する一対のスクリューセット３を有する。このスクリューセット３は、ゴム又はゴム系組成物等の被混練物の供給側より、回転シャフト４の外表面にスクリュー（フィン）５を備えた押出部６（一端部）と、回転シャフト４の外表面に複数個（図示例では４個）の混練ロータ７を備えた混練部８（中間部）と、回転シャフト４の外表面にスクリュー（フィン）９を備えた押出部１０（他端部）とから構成されている。   As shown in FIG. 3, the twin-screw kneading extruder 1 has a pair of screw sets 3 parallel to the inside of the barrel 2. The screw set 3 includes an extruding portion 6 (one end portion) provided with a screw (fin) 5 on the outer surface of the rotating shaft 4 from the supply side of the material to be kneaded such as rubber or a rubber-based composition, and the rotating shaft 4. A kneading part 8 (intermediate part) provided with a plurality of (4 in the illustrated example) kneading rotors 7 on the outer surface, and an extruding part 10 (other end part) provided with screws (fins) 9 on the outer surface of the rotary shaft 4 ).

従って、二軸混練押出機１においては、押出部６の相対向するスクリュー５は、図示しないホッパから投入された被混練物を下流方向に搬送して、混練部８に供給する。この混練部８では、回転シャフト４の外表面に備えられた複数個の混練ロータ７の噛み合いによって、また、この混練ロータ７の翼部先端とバレル２の内壁面との間に発生する剪断力によって被混練物を混練する。そして、混練済みの材料は、混練部８の下流側に位置する押出部１０において相対向するスクリュー９によって次工程に搬出される。   Therefore, in the twin-screw kneading extruder 1, the opposing screws 5 of the extruding unit 6 convey the material to be kneaded introduced from a hopper (not shown) in the downstream direction and supply it to the kneading unit 8. In the kneading section 8, a shearing force generated by the meshing of the plurality of kneading rotors 7 provided on the outer surface of the rotating shaft 4 and between the blade tip of the kneading rotor 7 and the inner wall surface of the barrel 2. The material to be kneaded is kneaded. Then, the kneaded material is carried out to the next step by the screw 9 facing each other in the extrusion unit 10 located on the downstream side of the kneading unit 8.

図１に示すように、前記混練ロータ７は、ロータ本体１１の外周に、押出方向へ連続的に捻れた長翼１２とロータ本体軸端の押出方向上流側と下流側より延びる二個（一個又は三個以上でも良い）の短翼１３ａ，１３ｂとを備えると共に、これら短翼１３ａ，１３ｂの長さＬａ，Ｌｂをロータ本体の長さＬの１／２よりも短くしてなる。   As shown in FIG. 1, the kneading rotor 7 has two long blades 12 continuously twisted in the extrusion direction on the outer periphery of the rotor body 11 and two (one piece) extending from the upstream and downstream sides in the extrusion direction of the rotor body shaft end. (Or three or more blades 13a and 13b), and the lengths La and Lb of the short blades 13a and 13b are shorter than ½ of the length L of the rotor body.

また、前記長翼１２のロータ本体軸線に対する捻れ角θＬを３０〜６０°に設定すると共に、押出方向上流側の短翼（第１短翼）１３ａのロータ本体軸線に対する捻れ角θＳも３０〜６０°に設定している。尚、押出方向下流側の短翼（第２短翼）１３ｂにおいてもその捻れ角を３０〜６０°に設定しても良い。   The twist angle θL of the long blade 12 with respect to the rotor body axis is set to 30 to 60 °, and the twist angle θS of the short blade (first short blade) 13a on the upstream side in the extrusion direction with respect to the rotor body axis is also set to 30 to 60. It is set to °. Note that the twist angle of the short blade (second short blade) 13b on the downstream side in the extrusion direction may be set to 30 to 60 °.

このように構成されるため、二軸混練押出機１における混練部８においては、相対向する一対のロータ本体１１は、互いに１８０°の位相差をもって配置されているので、それらの回転時には、一方のロータ本体１１の長翼１２が他方のロータ本体１１の短翼１３ａと短翼１３ｂの間をそれらと噛み合いながら通過していくことになる。   Since it is configured in this manner, in the kneading unit 8 in the twin-screw kneading extruder 1, the pair of opposed rotor bodies 11 are arranged with a phase difference of 180 ° from each other. The long blade 12 of the rotor main body 11 passes between the short blade 13a and the short blade 13b of the other rotor main body 11 while meshing with them.

これにより、被混練物の押出し能力を確保しつつ剪断性を上げて混練品質の向上が図れる。   Thereby, it is possible to improve the kneading quality by increasing the shearing property while ensuring the extrusion capability of the material to be kneaded.

また、本実施例では、混練ロータ７における長翼１２のロータ本体軸線に対する捻れ角θＬを３０〜６０°に設定すると共に、押出方向上流側の短翼（第１短翼）１３ａのロータ本体軸線に対する捻れ角θＳも３０〜６０°に設定しているので、被混練物の温度上昇が抑制される。以下に、その理由について図３のグラフを用いて説明する。   In the present embodiment, the twist angle θL of the long blade 12 in the kneading rotor 7 with respect to the rotor body axis is set to 30 to 60 °, and the rotor body axis of the short blade (first short blade) 13a on the upstream side in the extrusion direction. Since the twist angle θS with respect to is also set to 30 to 60 °, the temperature rise of the material to be kneaded is suppressed. Hereinafter, the reason will be described with reference to the graph of FIG.

図３のグラフから明らかなように、翼捻れ角θＬ，θＳが４５°のとき最大の圧力勾配が得られ、このときに被混練物の軸方向流れが最も良好となり、配合剤の混合及び分散性も最も良好となる。そして、翼捻れ角θＬ，θＳが３０〜６０°では、必要な剪断力を維持した状態で良好な軸方向流動性が確保されることになる。このような良好な軸方向流動性が確保されれば、被混練物の温度上昇が抑制されることになる。   As is apparent from the graph of FIG. 3, the maximum pressure gradient is obtained when the blade twist angles θL and θS are 45 °. At this time, the axial flow of the material to be kneaded is the best, and the mixing and dispersion of the compounding agents are performed. The property is also the best. When the blade twist angles θL and θS are 30 to 60 °, good axial fluidity is ensured while maintaining the necessary shearing force. If such good axial fluidity is ensured, the temperature rise of the material to be kneaded will be suppressed.

尚、上記実施例において、混練ロータ７はスクリューセット４上に、一個又は複数個宛、断続的に複数箇所配置されても良い。   In the above embodiment, one or more kneading rotors 7 may be arranged intermittently at a plurality of locations on the screw set 4.

図４は本発明の実施例２を示す混練ロータの展開図である。   FIG. 4 is a development view of the kneading rotor showing Example 2 of the present invention.

これは、実施例１における混練ロータ７において、長翼１２Ａのロータ本体軸端側を切欠き、該長翼切欠き部の軸方向長さＬｃ，Ｌｄより短翼１３ａ，１３ｂの長さＬａ，Ｌｂを長くした例である。その他の構成は実施例１と同様なので、図１と同一部材には同一符号を付して重複する説明は省略する。   This is because, in the kneading rotor 7 in the first embodiment, the rotor body shaft end side of the long blade 12A is notched, and the length La of the short blades 13a and 13b is longer than the axial length Lc and Ld of the long blade notch. This is an example in which Lb is lengthened. Since the other configuration is the same as that of the first embodiment, the same members as those in FIG.

これによれば、実施例１と同様の作用・効果に加えて、長翼切欠き部にて被混練物の流れを分岐することで、長翼１２Ａでの軸方向流動性がより一層向上されるという利点がある。   According to this, in addition to the same operations and effects as in Example 1, the flow of the material to be kneaded is branched at the long blade notch, thereby further improving the axial fluidity at the long blade 12A. There is an advantage that.

図５は本発明の実施例３を示す混練ロータの展開図である。   FIG. 5 is a development view of the kneading rotor showing the third embodiment of the present invention.

これは、実施例１及び２における混練ロータ７において、押出方向下流側の短翼１３ｂの捻れ角を反転させた、つまり押出方向上流側に向けて短翼１３ｂの角度を外側に拡げた例である。その他の構成は実施例１と同様なので、図１と同一部材には同一符号を付して重複する説明は省略する。   This is an example in which the twist angle of the short blade 13b on the downstream side in the extrusion direction is reversed in the kneading rotor 7 in Examples 1 and 2, that is, the angle of the short blade 13b is expanded outward toward the upstream side in the extrusion direction. is there. Since the other configuration is the same as that of the first embodiment, the same members as those in FIG.

これによれば、実施例１と同様の作用・効果に加えて、混練ロータ７において被混練物を押し出しつつ反転させた短翼１３ｂにより混練滞留時間が増加されて、混練品質の向上がより一層図れるという利点がある。   According to this, in addition to the same operations and effects as in Example 1, the kneading residence time is increased by the short blade 13b that is inverted while extruding the material to be kneaded in the kneading rotor 7, and the kneading quality is further improved. There is an advantage that it can be planned.

図６は本発明の実施例４を示すロータ軸／翼径比とゴム温度（冷却性能）との関係を示すグラフである。   FIG. 6 is a graph showing the relationship between the rotor shaft / blade diameter ratio and the rubber temperature (cooling performance) in Example 4 of the present invention.

これは、実施例１乃至３における混練ロータ７（図１，図４及び図５参照）において、ロータ本体外径（ロータ軸）Ｄ１と翼径Ｄ２との比であるＤ１／Ｄ２が０．３５以上、好ましくは０．５以上に設定した例であり、その他の構成は実施例１乃至３と同様なので、図１，図４及び図５と同一部材には同一符号を付して重複する説明は省略する。   This is because, in the kneading rotor 7 in Examples 1 to 3 (see FIGS. 1, 4 and 5), D1 / D2, which is the ratio of the rotor body outer diameter (rotor shaft) D1 to the blade diameter D2, is 0.35. As described above, the example is preferably set to 0.5 or more, and the other configurations are the same as those in the first to third embodiments. Therefore, the same members as those in FIGS. Is omitted.

これによれば、実施例１乃至３と同様の作用・効果に加えて、混練ロータ７における冷却性能（伝熱能力）がより一層向上されるという利点がある。   According to this, in addition to the same operations and effects as in Examples 1 to 3, there is an advantage that the cooling performance (heat transfer capability) in the kneading rotor 7 is further improved.

即ち、前記Ｄ１／Ｄ２の設定により、混練ロータ７とバレル２（図３参照）との間の被混練物の厚みを伝熱能力の面から適正化でき、バレル２内部の冷却水による冷却機構の冷却作用を十分に発揮させられて混練部８（図３参照）の冷却性能が高められることから、図６に示す実験結果でも判るように、冷却時間（被混練物の滞留時間）が短くても温度低下の効果が期待でき、被混練物の材料に左右されない汎用性の高い二軸混練押出機１（図３参照）を提供することができるのである。   That is, by setting D1 / D2, the thickness of the material to be kneaded between the kneading rotor 7 and the barrel 2 (see FIG. 3) can be optimized from the viewpoint of heat transfer capability, and the cooling mechanism using cooling water inside the barrel 2 Since the cooling performance of the kneading part 8 (see FIG. 3) is enhanced and the cooling performance of the kneading part 8 (see FIG. 3) is enhanced, the cooling time (retention time of the material to be kneaded) is short as can be seen from the experimental results shown in FIG. However, the effect of lowering the temperature can be expected, and a highly versatile twin-screw kneading extruder 1 (see FIG. 3) that is not affected by the material of the material to be kneaded can be provided.

図７は本発明の実施例５を示す二軸混練押出機の平断面図である。   FIG. 7 is a plan sectional view of a twin-screw kneading extruder showing Example 5 of the present invention.

これは、実施例１乃至４における混練ロータ７（図示例では１個であるが図３のように複数個連接されていても良い）の上流側と下流側に（どちらか一方でも良い）ニーディングディスク１５Ａ，１５Ｂを配置した例であり、その他の構成は実施例１乃至４と同様なので、図３と同一部材には同一符号を付して重複する説明は省略する。   This is because the kneading rotors 7 in the first to fourth embodiments (one in the illustrated example, but a plurality of kneading rotors may be connected as shown in FIG. 3) on the upstream side and the downstream side (either one may be used). This is an example in which the ding disks 15A and 15B are arranged, and other configurations are the same as those in the first to fourth embodiments. Therefore, the same members as those in FIG.

前記ニーディングディスク１５Ａ，１５Ｂは不連続に断面形状が変化するものや被混練物の押出能力のない中立翼を有するものが選択される。   As the kneading disks 15A and 15B, those having a discontinuous change in cross-sectional shape and those having a neutral blade having no ability to extrude the material to be kneaded are selected.

これによれば、実施例１乃至４と同様の作用・効果に加えて、ニーディングディスク１５Ａ，１５Ｂによる被混練物の非送り作用や戻し作用で混練ロータ７の機能がフルに発揮され、混練部８における混練性能がより一層向上されるので、装置長さを短縮でき、省スペース化及び低コスト化が図れるという利点がある。   According to this, the function of the kneading rotor 7 is fully exhibited by the non-feeding action and the returning action of the material to be kneaded by the kneading disks 15A and 15B in addition to the actions and effects similar to those of the first to fourth embodiments. Since the kneading performance in the section 8 is further improved, there is an advantage that the apparatus length can be shortened, and space saving and cost reduction can be achieved.

尚、上記実施例において、前記混練ロータ７とニーディングディスク１５Ａ，１５Ｂの組合せは、スクリューセット４上に連続的あるいは断続的に複数箇所設置されても良い。   In the above embodiment, the combination of the kneading rotor 7 and the kneading disks 15A and 15B may be installed on the screw set 4 continuously or intermittently at a plurality of locations.

図８は本発明の実施例６を示す一軸混練押出機の平断面図である。   FIG. 8 is a plan sectional view of a single-screw kneading extruder showing Example 6 of the present invention.

これは、実施例１乃至４における混練ロータ７を一軸混練押出機に適用した例であり、その他の構成は実施例１乃至４と同様なので、図３と同一部材には同一符号を付して重複する説明は省略する。これによるも二軸混練押出機と同様の作用・効果が得られる。   This is an example in which the kneading rotor 7 in Examples 1 to 4 is applied to a single-screw kneading extruder, and the other components are the same as those in Examples 1 to 4. Therefore, the same members as those in FIG. A duplicate description is omitted. This also provides the same operation and effect as a twin-screw kneading extruder.

尚、図９は従来技術と本発明の分散度改善効果を比較したグラフである。   FIG. 9 is a graph comparing the dispersion improvement effect of the prior art and the present invention.

図中（１）は従来のスクリューのみの場合で、（２）は従来のスクリューの途中にニーディングディスクを配置した場合で、（３）はスクリューの途中に本発明の混練ロータを配置した場合で、（４）はスクリューの途中に本発明の混練ロータを配置すると共にその上流側に本発明のニーディングディスクを配置した場合で、（５）はスクリューの途中に本発明の混練ロータを配置すると共にその下流側に本発明のニーディングディスクを配置した場合で、（６）はスクリューの途中に本発明の混練ロータを配置すると共にその上流側と下流側に本発明のニーディングディスクを配置した場合である。   In the figure, (1) shows the case of a conventional screw only, (2) shows the case where a kneading disk is arranged in the middle of the conventional screw, and (3) shows the case where the kneading rotor of the present invention is arranged in the middle of the screw. (4) is the case where the kneading rotor of the present invention is disposed in the middle of the screw and the kneading disk of the present invention is disposed upstream thereof, and (5) is the kneading rotor of the present invention disposed in the middle of the screw. When the kneading disk of the present invention is arranged on the downstream side, the kneading rotor of the present invention is arranged in the middle of the screw, and the kneading disk of the present invention is arranged on the upstream side and downstream side of the kneading rotor. This is the case.

本グラフからも、本発明は従来技術よりも分散度改善効果が高いことが判る。   This graph also shows that the present invention has a higher degree of dispersion improvement than the prior art.

本発明に係る連続混練装置は、ゴムあるいは各種配合剤などを添加したゴムからなる被混練物に限らず、樹脂等からなる被混練物にも適用することができる。   The continuous kneading apparatus according to the present invention can be applied not only to a material to be kneaded made of rubber or rubber to which various compounding agents are added, but also to a material to be kneaded made of resin or the like.

本発明の実施例１を示す混練ロータの展開図である。It is an expanded view of the kneading rotor which shows Example 1 of this invention. 翼捻れ角と軸方向圧力勾配との関係を示すグラフである。It is a graph which shows the relationship between a blade twist angle and an axial direction pressure gradient. 二軸混練押出機の平断面図である。It is a plane sectional view of a twin screw kneading extruder. 本発明の実施例２を示す混練ロータの展開図である。It is an expanded view of the kneading rotor which shows Example 2 of this invention. 本発明の実施例３を示す混練ロータの展開図である。It is an expanded view of the kneading rotor which shows Example 3 of this invention. 本発明の実施例４を示すロータ軸／翼径比とゴム温度（冷却性能）との関係を示すグラフである。It is a graph which shows the relationship between the rotor shaft / blade diameter ratio and rubber temperature (cooling performance) which show Example 4 of this invention. 本発明の実施例５を示す二軸混練押出機の平断面図である。It is a plane sectional view of the twin-screw kneading extruder showing Example 5 of the present invention. 本発明の実施例６を示す一軸混練押出機の平断面図である。It is a plane sectional view of the single screw kneading extruder showing Example 6 of the present invention. 従来技術と本発明の分散度改善効果を比較したグラフである。It is the graph which compared the dispersion degree improvement effect of a prior art and this invention.

符号の説明 １ 二軸混練押出機、２ バレル、３ スクリューセット、４ 回転シャフト、５ スクリュー、６ 押出部、７ 混練ロータ、８ 混練部、９ スクリュー、１０ 押出部、１１ ロータ本体、１２ 長翼、１３ａ，１３ｂ 短翼、１５Ａ，１５Ｂ ニーディングディスク、２０ 一軸混練押出機、θＬ 長翼の捻れ角、θＳ 短翼の捻れ角、Ｌａ，Ｌｂ 短翼の長さ、Ｌｃ，Ｌｄ 長翼切欠き部の長さ、Ｄ１ ロータ本体外径、Ｄ２ 翼径。   DESCRIPTION OF SYMBOLS 1 Twin-screw kneading extruder, 2 barrel, 3 screw set, 4 rotating shaft, 5 screw, 6 extrusion part, 7 kneading rotor, 8 kneading part, 9 screw, 10 extrusion part, 11 rotor main body, 12 long blade , 13a, 13b Short blade, 15A, 15B Kneading disk, 20 Uniaxial kneading extruder, θL Long blade twist angle, θS Short blade twist angle, La, Lb Short blade length, Lc, Ld Long blade notch Part length, D1 rotor body outer diameter, D2 blade diameter.

Claims (13)

筒状のチャンバを有したバレルと、
前記チャンバ内で回転することで、被混練物を下流側に押し出すスクリューセットと、 前記スクリューセットに組み込まれ、前記チャンバ内壁面との間の間隙で剪断を付与し被混練物の混練を行う混練ロータと、
を備えた連続混練装置において、
前記混練ロータは、ロータ本体の外周に、押出方向へ連続的に捻れた長翼とロータ本体軸端より延びる一個以上の短翼とを備えると共に、前記短翼の長さをロータ本体の長さの１／２よりも短くしてなることを特徴とする連続混練装置。 A barrel with a cylindrical chamber;
A screw set that pushes the material to be kneaded downstream by rotating in the chamber, and a kneading that is incorporated in the screw set and kneads the material to be kneaded by applying shear in the gap between the chamber inner wall surface A rotor,
In a continuous kneading apparatus equipped with
The kneading rotor includes long blades continuously twisted in the extruding direction and one or more short blades extending from the rotor body shaft end on the outer periphery of the rotor body, and the length of the short blades is the length of the rotor body. A continuous kneader characterized by being shorter than 1/2 of the above. 前記長翼のロータ本体軸端側を切欠き、該長翼切欠き部の軸方向長さより前記短翼の長さを長くしたことを特徴とする請求項１記載の連続混練装置。   2. The continuous kneading apparatus according to claim 1, wherein the rotor blade shaft end side of the long blade is notched, and the length of the short blade is made longer than the axial length of the long blade notch. 前記長翼のロータ本体軸線に対する捻れ角を３０〜６０°に設定したことを特徴とする請求項１又は２記載の連続混練装置。   The continuous kneading apparatus according to claim 1 or 2, wherein a twist angle of the long blade with respect to the rotor body axis is set to 30 to 60 °. 前記短翼は押出方向上流側の第１短翼と押出方向下流側の第２短翼を有し、これら第１短翼と第２短翼の少なくとも一方のロータ本体軸線に対する捻れ角を３０〜６０°に設定したことを特徴とする請求項１，２又は３記載の連続混練装置。   The short blade has a first short blade on the upstream side in the extruding direction and a second short blade on the downstream side in the extruding direction, and the twist angle with respect to the rotor body axis of at least one of the first short blade and the second short blade is 30 to 30 degrees. 4. The continuous kneading apparatus according to claim 1, wherein the continuous kneading apparatus is set to 60 °. 前記第２短翼の捻れ角を反転させたことを特徴とする請求項４記載の連続混練装置。   The continuous kneading apparatus according to claim 4, wherein the twist angle of the second short blade is reversed. 前記混練ロータにおけるロータ本体外径Ｄ１と翼径Ｄ２との比であるＤ１／Ｄ２が０．３５以上であることを特徴とする請求項１，２，３，４又は５記載の連続混練装置。   6. The continuous kneading apparatus according to claim 1, wherein D1 / D2 which is a ratio of a rotor main body outer diameter D1 and a blade diameter D2 in the kneading rotor is 0.35 or more. 前記混練ロータの上流あるいは下流側の少なくとも一方に、不連続に断面形状が変化するニーディングディスクを配置したことを特徴とする請求項１，２，３，４，５又は６記載の連続混練装置。   7. The continuous kneading apparatus according to claim 1, wherein a kneading disk having a discontinuous change in cross-sectional shape is disposed on at least one of an upstream side or a downstream side of the kneading rotor. . 前記ニーディングディスクは被混練物の押出能力のない中立翼を有することを特徴とする請求項７記載の連続混練装置。   The continuous kneading apparatus according to claim 7, wherein the kneading disk has a neutral blade having no ability to extrude the material to be kneaded. 前記混練ロータはスクリューセット上に連続的あるいは断続的に複数個配置されることを特徴とする請求項１，２，３，４，５又は６記載の連続混練装置。   7. The continuous kneading apparatus according to claim 1, wherein a plurality of the kneading rotors are arranged on the screw set continuously or intermittently. 前記混練ロータとニーディングディスクの組合せはスクリューセット上に連続的あるいは断続的に複数箇所設置されることを特徴とする請求項７又は８記載の連続混練装置。   The continuous kneading apparatus according to claim 7 or 8, wherein a combination of the kneading rotor and the kneading disk is installed at a plurality of locations on the screw set continuously or intermittently. 前記連続混練装置は一軸混練押出機であることを特徴とする請求項１，２，３，４，５，６，７，８，９又は１０記載の連続混練装置。   The continuous kneading apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the continuous kneading apparatus is a uniaxial kneading extruder. 前記連続混練装置は二軸混練押出機であることを特徴とする請求項１，２，３，４，５，６，７，８，９又は１０記載の連続混練装置。   The continuous kneading apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the continuous kneading apparatus is a twin-screw kneading extruder. 前記連続混練装置はゴム又はゴム系組成物を混練することを特徴とする請求項１，２，３，４，５，６，７，８，９，１０，１１又は１２記載の連続混練装置。   The continuous kneading apparatus according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, wherein the continuous kneading apparatus kneads rubber or a rubber-based composition.
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WO2014103783A1 (en) * 2012-12-26 2014-07-03 株式会社ブリヂストン Kneading device

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JPH0911229A (en) * 1995-04-24 1997-01-14 Kobe Steel Ltd Hermetically closed kneading apparatus
JPH09216224A (en) * 1996-02-13 1997-08-19 Mitsubishi Heavy Ind Ltd Closed type kneader
JP2001150428A (en) * 1999-11-26 2001-06-05 Mitsubishi Heavy Ind Ltd Sealed kneader
JP2002120221A (en) * 2000-10-17 2002-04-23 Nok Corp Enclosed kneader
JP2003245534A (en) * 2002-02-21 2003-09-02 Kobe Steel Ltd Kneader for rubber or rubbery composition
JP2005059528A (en) * 2003-08-20 2005-03-10 Mitsubishi Heavy Ind Ltd Rotor for kneading

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JPH08229938A (en) * 1995-03-01 1996-09-10 Mitsubishi Heavy Ind Ltd Closed type rubber kneader
JPH0911229A (en) * 1995-04-24 1997-01-14 Kobe Steel Ltd Hermetically closed kneading apparatus
JPH09216224A (en) * 1996-02-13 1997-08-19 Mitsubishi Heavy Ind Ltd Closed type kneader
JP2001150428A (en) * 1999-11-26 2001-06-05 Mitsubishi Heavy Ind Ltd Sealed kneader
JP2002120221A (en) * 2000-10-17 2002-04-23 Nok Corp Enclosed kneader
JP2003245534A (en) * 2002-02-21 2003-09-02 Kobe Steel Ltd Kneader for rubber or rubbery composition
JP2005059528A (en) * 2003-08-20 2005-03-10 Mitsubishi Heavy Ind Ltd Rotor for kneading

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014103783A1 (en) * 2012-12-26 2014-07-03 株式会社ブリヂストン Kneading device
JP2014124589A (en) * 2012-12-26 2014-07-07 Bridgestone Corp Kneading device
CN104853835A (en) * 2012-12-26 2015-08-19 普利司通股份有限公司 Kneading device
US9687797B2 (en) 2012-12-26 2017-06-27 Bridgestone Corporation Kneading device

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