JP2011083700A - Kneader - Google Patents

Kneader Download PDF

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JP2011083700A
JP2011083700A JP2009238537A JP2009238537A JP2011083700A JP 2011083700 A JP2011083700 A JP 2011083700A JP 2009238537 A JP2009238537 A JP 2009238537A JP 2009238537 A JP2009238537 A JP 2009238537A JP 2011083700 A JP2011083700 A JP 2011083700A
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kneading
rotor
kneading rotor
bearing
vibration
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JP5164955B2 (en
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Tomonori Nakashita
智徳 中下
Koichi Honke
浩一 本家
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Kobe Steel Ltd
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Kobe Steel 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
    • B29C48/54—Screws with additional forward-feeding 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
    • B29C48/251—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments
    • B29C48/2511—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments by modelling material flow, e.g. melt interaction with screw and barrel
    • B29C48/2513—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments by modelling material flow, e.g. melt interaction with screw and barrel in the plasticising zone

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Accessories For Mixers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the vibration of a casing by reducing the bearing load produced by the inertial force caused by the excitation of a kneading rotor at the time of kneading. <P>SOLUTION: The kneader is equipped with the kneading rotor 2 provided in the casing 3, the bearings for supporting the kneading rotor 2 in a freely rotatable manner and a drive device 4 for rotationally driving the kneading rotor 2. The kneading rotor 2 is extended in its axial center direction on the side opposite to the drive device 4 and a loading member 11 for reducing the load of the bearings caused by the inertial force of the kneading rotor 2 produced at the time of kneading is provided to the extension part 10 of the kneading rotor 2. The weight of the loading member 11 is calculated corresponding to the mass of the kneading rotor 2 between the bearings. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、例えば、樹脂等の材料を混練ロータによって混練する混練機に関するものである。   The present invention relates to a kneader for kneading a material such as a resin with a kneading rotor.

従来より、混練機は混練ロータを備えており、この混練ロータは、ケーシング内に収容されて、ケーシング内に設けられた複数の軸受により回転自在に支持されている。このような混練機において、混練を行う際は、混練ロータを駆動モータの駆動力により回転させることによりケーシング内に投入された材料を混練するのが一般的である（例えば、特許文献１）。   Conventionally, a kneading machine has been provided with a kneading rotor, and this kneading rotor is housed in a casing and is rotatably supported by a plurality of bearings provided in the casing. In such a kneading machine, when kneading is performed, it is common to knead the material put into the casing by rotating the kneading rotor by the driving force of the drive motor (for example, Patent Document 1).

特開２００５−７６５８号公報JP 2005-7658 A

特許文献１などに示すような混練機では、材料を溶融しながら混練・押出しを行う性質上、混練ロータの混練部分には周期的な加振力が発生する。この加振力が小さい場合には問題がないが、混練機が大型化するにつれ、加振力も大きくなっていることが実情である。混練時における大きな加振力によって、混練ロータには一次モードの振動が発生してしまい、その振動により軸受部に多大な荷重がかかることになる。このように、混練時に大きな軸受部がかかると、加振力が外部へ伝達して、その結果、ケーシングが振動してしまうという問題がある。   In a kneading machine as shown in Patent Document 1 and the like, periodic excitation force is generated in the kneading portion of the kneading rotor due to the property of kneading and extruding while melting the material. There is no problem when this excitation force is small, but the fact is that the excitation force increases as the kneader becomes larger. Due to the large excitation force at the time of kneading, vibration of the primary mode is generated in the kneading rotor, and a great load is applied to the bearing portion due to the vibration. As described above, when a large bearing portion is applied during kneading, the excitation force is transmitted to the outside, and as a result, there is a problem that the casing vibrates.

しかしながら、特許文献１に示すような混練機においては、一次モードの振動、加振力による振動に起因してケーシングに発生する振動を抑えるという対策は未だされていないのが実情である。
本発明は、上述の問題に鑑みてなされたものであり、混練時における混練ロータの加振により生じる慣性力により発生する軸受荷重を低減させることによって、ケーシングの振動を抑えることができる混練機を提供することを目的とする。 However, in the kneading machine as shown in Patent Document 1, it is the actual situation that measures for suppressing the vibration generated in the casing due to the vibration of the primary mode and the vibration due to the excitation force have not been taken yet.
The present invention has been made in view of the above-described problems, and provides a kneader capable of suppressing casing vibration by reducing a bearing load generated by an inertial force generated by vibration of a kneading rotor during kneading. The purpose is to provide.

前記目的を達成するため、本発明は次の技術的手段を講じている。
即ち、ケーシング内に設けられた混練ロータと、この混練ロータを回転自在に支持する軸受と、前記混練ロータに回転駆動を付与する駆動装置とを備え、前記混練ロータにおいて前記駆動装置とは反対側を軸芯方向に延設し、この延設部に混練時での前記混練ロータの慣性力により発生する前記軸受の荷重を低減させる加重部材を設けた点にある。 In order to achieve the object, the present invention takes the following technical means.
That is, a kneading rotor provided in a casing, a bearing that rotatably supports the kneading rotor, and a driving device that applies a rotational drive to the kneading rotor, the kneading rotor on the side opposite to the driving device. Is extended in the axial direction, and a load member for reducing the load of the bearing generated by the inertial force of the kneading rotor at the time of kneading is provided in the extending portion.

前記加重部材の重量は、前記軸受間の混練ロータの質量に基づいて求めることが好ましい。例えば、混練ロータの回転時の挙動をシミュレーション可能なモデルにより数値計算で求めてもよいし、混練ロータの挙動を表す運動方程式を立てて、この式から求めても良い。   The weight of the weight member is preferably obtained based on the mass of the kneading rotor between the bearings. For example, the behavior during rotation of the kneading rotor may be obtained by numerical calculation using a model that can be simulated, or an equation of motion representing the behavior of the kneading rotor may be established and obtained from this equation.

本発明によれば、混練時における混練ロータの加振により生じる慣性力により発生する軸受荷重を低減させることによって、ケーシングの振動を抑えることができる。   According to the present invention, the vibration of the casing can be suppressed by reducing the bearing load generated by the inertial force generated by the vibration of the kneading rotor during kneading.

本発明の混練機の全体図である。1 is an overall view of a kneader according to the present invention. 混練ロータの振動を説明するものであって、（ａ）加重部材を設けない場合の振動、（ｂ）加重部材を設けた場合の振動を示すものである。The vibration of the kneading rotor will be described, and shows (a) vibration when no weight member is provided, and (b) vibration when a weight member is provided. ２軸混練機における振動モデルを示したものである。The vibration model in a biaxial kneader is shown. 一次モードの振動における軸受部にかかる荷重を示したものである。It shows the load applied to the bearing part in the vibration of the primary mode. 加振力と軸受加重との差を示したものである。It shows the difference between excitation force and bearing load.

以下、第１実施形態の混練機１を図面に基づき説明する。
図１に示すように、混練機１は、一対の混練ロータ２を備えた異方向回転型の２軸混練機１（以降、単に混練機１という）である。混練機１は、一対の混練ロータ２と、各混練ロータ２を支持するケーシング３と、混練ロータ２を回転駆動させる駆動装置４とを備えている。なお、説明の便宜上、図１の紙面の右側を上流側又はドライブエンド側とし、紙面の左側を下流側又はウォータエンド側とする。 Hereinafter, the kneading machine 1 of 1st Embodiment is demonstrated based on drawing.
As shown in FIG. 1, the kneading machine 1 is a bi-directional kneading machine 1 (hereinafter simply referred to as a kneading machine 1) having a pair of kneading rotors 2. The kneading machine 1 includes a pair of kneading rotors 2, a casing 3 that supports each kneading rotor 2, and a drive device 4 that rotationally drives the kneading rotor 2. For convenience of explanation, the right side of FIG. 1 is the upstream side or the drive end side, and the left side of the page is the downstream side or the water end side.

混練ロータ２は、駆動装置４からの動力により回転することによって樹脂等を混練するもので、ウォータエンド側（ＷＥ側）はケーシング３内に設けられた第１軸受部５により回転自在に支持され、ドライブエンド側（ＤＥ１、ＤＥ２）もケーシング３内に設けられた第２軸受部６及び第３軸受部７により回転自在に支持されている。なお、混練ロータ２の内部を冷却するために外部から冷却水等を供給する供給部が、混練ロータ２のウォータエンド側に設けられている。   The kneading rotor 2 kneads resin and the like by rotating with the power from the driving device 4, and the water end side (WE side) is rotatably supported by a first bearing portion 5 provided in the casing 3. The drive end side (DE1, DE2) is also rotatably supported by a second bearing portion 6 and a third bearing portion 7 provided in the casing 3. A supply unit for supplying cooling water or the like from the outside to cool the inside of the kneading rotor 2 is provided on the water end side of the kneading rotor 2.

混練ロータ２は、樹脂等を混練するためのロータ部８を有していて、当該ロータ部８は、ケーシング３内部に形成された混練室９に配置されている。第１軸受部５と第２軸受部６との距離（ＷＥ〜ＤＥ１）は、第２軸受部６と第３軸受部７との距離（ＤＥ１〜ＤＥ２）の距離よりも大きく設定されている。
このような混練機１において、駆動装置４の駆動力により混練ロータ２を回転させて混練室９の樹脂を混練したときの状態を考えると、ケーシング３や混練ロータ２の剛性等により混練ロータ２に２次モード以上の振動は発生しないようになっているが、１次モードの振動はある程度発生してしまい、その１次モードの振動がケーシング３に伝わってしまうことがある。 The kneading rotor 2 has a rotor portion 8 for kneading resin or the like, and the rotor portion 8 is disposed in a kneading chamber 9 formed inside the casing 3. The distance (WE to DE1) between the first bearing part 5 and the second bearing part 6 is set to be larger than the distance (DE1 to DE2) between the second bearing part 6 and the third bearing part 7.
In such a kneading machine 1, considering the state when the kneading rotor 2 is rotated by the driving force of the driving device 4 to knead the resin in the kneading chamber 9, the kneading rotor 2 depends on the rigidity of the casing 3 and kneading rotor 2. However, the vibration in the primary mode is not generated, but the vibration in the primary mode is generated to some extent, and the vibration in the primary mode may be transmitted to the casing 3.

そこで、本発明では、混練ロータ２のウォータエンド側において、第１軸受部５よりも外側の部分（反駆動側）を軸心方向に延設し、混練ロータ２の延設部１０に加重部材１１を設けることにより１次モードの振動がケーシングへ伝わるのを出来るだけ抑制している。
以下、本発明の混練機について詳しく説明する。 Therefore, in the present invention, on the water end side of the kneading rotor 2, a portion outside the first bearing portion 5 (reverse driving side) is extended in the axial direction, and the weighting member is provided to the extending portion 10 of the kneading rotor 2. 11 is suppressed as much as possible that the vibration of the primary mode is transmitted to the casing.
Hereinafter, the kneader of the present invention will be described in detail.

ケーシング３は、内部が空洞状に形成されて混練室９を形成する複数のバレル１２と、第１軸受部５が設けられた第１支持フレーム１３と、第２軸受部６が設けられた第２支持フレーム１４と、第３軸受部７が設けられた第３支持フレーム１５とを備えている。
各バレル１２は、ドライブエンド側からウォータエンド側に向けて順に隣接するように配置され、互いのバレル１２が連結することにより混練室９が形成されている。ドライブエンド側のバレル１２ａには、混練室９に樹脂等の材料を投入するためのホッパ１７が設けられている。ウォータエンド側に隣接するバレル１２ｂ、１２ｃ間には、混練度調整部１８が設けられている。混練度調整部１８は、混練室９の内周面と混練ロータ２との間に形成される材料の流路を開閉して材料の混練度を調整するものである。 The casing 3 has a plurality of barrels 12 that are formed in a hollow shape to form a kneading chamber 9, a first support frame 13 provided with a first bearing portion 5, and a second bearing portion 6 provided therein. 2 support frame 14 and a third support frame 15 provided with a third bearing portion 7.
Each barrel 12 is arranged so as to be adjacent in order from the drive end side to the water end side, and the kneading chamber 9 is formed by connecting the barrels 12 to each other. The barrel 12a on the drive end side is provided with a hopper 17 for feeding a material such as resin into the kneading chamber 9. A kneading degree adjusting unit 18 is provided between the barrels 12b and 12c adjacent to the water end side. The kneading degree adjusting section 18 adjusts the kneading degree of the material by opening and closing the material flow path formed between the inner peripheral surface of the kneading chamber 9 and the kneading rotor 2.

第１支持フレーム１３は、ウォータエンド側のバレル１２ｃに隣接して配置され、設置台２０に固定されている。第２支持フレーム１４は、ドライブエンド型のバレル１２ａに隣接して配置され、設置台２０に固定されている。第３支持フレーム１５は、第２支持フレーム１４に対して駆動装置４側に離間して配置され、設置台２０に固定されている。
第２支持フレーム１４と第３支持フレーム１５との間には、両者を連結する筒状の連結部材２１が設けられ、当該連結部材２１内にも混練ロータ２が設けられている。なお、第１支持フレーム１３、第２支持フレーム１４、第３支持フレーム１５、各バレル１２は同一軸芯上に配置されている。 The first support frame 13 is disposed adjacent to the barrel 12 c on the water end side and is fixed to the installation base 20. The second support frame 14 is disposed adjacent to the drive end type barrel 12 a and is fixed to the installation base 20. The third support frame 15 is disposed so as to be separated from the second support frame 14 on the drive device 4 side, and is fixed to the installation base 20.
Between the 2nd support frame 14 and the 3rd support frame 15, the cylindrical connection member 21 which connects both is provided, and the kneading rotor 2 is provided also in the said connection member 21. As shown in FIG. In addition, the 1st support frame 13, the 2nd support frame 14, the 3rd support frame 15, and each barrel 12 are arrange | positioned on the same axis.

混練ロータ２は、大別して、材料の混練や送り出しを行う混練部２２と、この混練部２２の軸方向両側に設けられた軸部２３とから構成されている。
混練部２２は、混練室９に設けられて、当該混練部２２の軸方向中央部側には樹脂を混練するロータ部８が形成され、ロータ部８の軸方向両側には樹脂を送る送り部２４が形成されている。 The kneading rotor 2 is roughly composed of a kneading part 22 for kneading and feeding out materials and shaft parts 23 provided on both sides in the axial direction of the kneading part 22.
The kneading part 22 is provided in the kneading chamber 9, the rotor part 8 for kneading the resin is formed on the axially central part side of the kneading part 22, and the feeding part for sending the resin on both axial sides of the rotor part 8 24 is formed.

混練部２２のウォータエンド側に設けられた軸部２３ａ（第１軸部ということがある）は、第１支持フレーム１３の第１軸受部５に回転自在に支持されている。図１の拡大図に示すように、第１軸部２３ａは、第１軸受部５の下流側端部から、さらに、下流側に延びたものとされていて、その延設部１０に数百ｋｇの加重部材１１が設けられている。言い換えれば、第１軸部２３ａは、第１支持フレーム１３を軸方向に貫通していて当該第１支持フレーム１３から外部に露出したものとなっており、露出した部分（延設部１０）に数百ｋｇの加重部材１１が設けられている。   A shaft portion 23 a (sometimes referred to as a first shaft portion) provided on the water end side of the kneading portion 22 is rotatably supported by the first bearing portion 5 of the first support frame 13. As shown in the enlarged view of FIG. 1, the first shaft portion 23 a extends further downstream from the downstream end portion of the first bearing portion 5, and several hundreds are provided in the extending portion 10. A weight member 11 of kg is provided. In other words, the first shaft portion 23a penetrates the first support frame 13 in the axial direction and is exposed to the outside from the first support frame 13, and is exposed to the exposed portion (extension portion 10). A load member 11 of several hundred kg is provided.

例えば、加重部材１１は、筒状に形成されて円柱状の延設部１０に嵌り込む凹部を有しており、凹部を円柱状の延設部１０に嵌め込んで固定することにより、延設部１０に加重部材１１が取り付けられるようになっている。なお、混練ロータ２（延設部１０）が回転したときを考えると、加重部材１１の重心と延設部１０の重心とは一致するように（延設部１０の軸芯と加重部材１１の軸芯とが一致するように）、延設部１０に加重部材１１が取り付けられるようになっている。また、加重部材１１は、回転時に軸芯がずれないように回転対称の形状となっている。   For example, the weight member 11 has a concave portion that is formed in a cylindrical shape and fits into the cylindrical extension portion 10, and the extension is provided by fitting the concave portion into the cylindrical extension portion 10 and fixing the concave portion. A weight member 11 is attached to the portion 10. When the kneading rotor 2 (extension portion 10) rotates, the center of gravity of the weight member 11 and the center of gravity of the extension portion 10 coincide (the axis of the extension portion 10 and the weight member 11). The weight member 11 is attached to the extended portion 10 so that the axis coincides with the axis. Further, the weight member 11 has a rotationally symmetric shape so that the axis does not shift during rotation.

混練部２２のドライブエンド側に設けられた軸部２３ｂ（第２軸部ということがある）は、第２支持フレーム１４の第２軸受部６及び第３支持フレーム１５の第３軸受部７に回転自在に支持されている。また、第２軸部２３ｂは、減速機２５を介して駆動装置４（駆動モータ）に連結され、駆動装置４の動力を混練部２２に伝達するように構成されている。   A shaft portion 23 b (sometimes referred to as a second shaft portion) provided on the drive end side of the kneading portion 22 is provided on the second bearing portion 6 of the second support frame 14 and the third bearing portion 7 of the third support frame 15. It is supported rotatably. The second shaft portion 23 b is connected to the drive device 4 (drive motor) via the speed reducer 25 and is configured to transmit the power of the drive device 4 to the kneading portion 22.

以上により、駆動装置４を駆動すると、第２軸部２３ｂに駆動装置４からの動力が伝達され、混練部２２が回転することにより樹脂等の材料を混練することができる。
図２は、混練を行ったときの混練ロータ２の振動を模したものである。
図２（ａ）に示すように、このように混練ロータ２が回転して混練室９にて材料を混練している状態では、混練ロータ２の中央部付近にて径外方向に加振力が働く。また、加振力が加わりながら混練ロータ２には慣性力Ｆが働くことから、この慣性力Ｆの影響によりウォータエンド側（ＷＥ側）の第１軸受部５、ドライブエンド側（ＤＥ１、ＤＥ２）の第２軸受部６及び第３軸受部７が振動の節となって１次モードの振動が発生する。 As described above, when the drive device 4 is driven, the power from the drive device 4 is transmitted to the second shaft portion 23b, and the kneading portion 22 rotates to knead a material such as resin.
FIG. 2 illustrates the vibration of the kneading rotor 2 when kneading is performed.
As shown in FIG. 2A, in the state where the kneading rotor 2 is rotated and the material is kneaded in the kneading chamber 9 as described above, the exciting force is exerted in the radially outward direction near the center of the kneading rotor 2. Work. Further, since the inertial force F acts on the kneading rotor 2 while applying the excitation force, the influence of the inertial force F causes the first bearing portion 5 on the water end side (WE side), the drive end side (DE1, DE2). The second bearing portion 6 and the third bearing portion 7 serve as vibration nodes, and vibration in the primary mode is generated.

このとき、混練ロータ２の加振によって生じる慣性力により、第１軸受部５に大きな荷重が掛かることになり、その結果、この第１軸受部５を介して、この力がケーシング３（第１支持フレーム１３）に伝達してしまい、第１支持フレーム１３が振動してしまう。
しかしながら、本発明では、図２（ｂ）に示すように、ウォータエンド側（ＷＥ側）の混練ロータ２側を延設して加重部材１１を設けている（ウォータエンド側の第１軸部２３ａを軸方向に延長してその延設部１０に加重部材１１を設けている）ために、加振によって生じる慣性力の影響により掛かっていた第１軸受部５への荷重が相殺され、その結果、この第１軸受部５から第１支持フレーム１３への加振力の伝達（加振の影響による振動の伝達）を抑えることができ、第１支持フレーム１３の振動を防止することができる。 At this time, a large load is applied to the first bearing portion 5 due to the inertial force generated by the vibration of the kneading rotor 2, and as a result, this force is transmitted through the first bearing portion 5 to the casing 3 (first This is transmitted to the support frame 13), and the first support frame 13 vibrates.
However, in the present invention, as shown in FIG. 2B, the weighting member 11 is provided by extending the kneading rotor 2 side on the water end side (WE side) (the first shaft portion 23a on the water end side). As a result, the load applied to the first bearing portion 5 due to the influence of the inertial force generated by the vibration is canceled out. The transmission of the excitation force from the first bearing portion 5 to the first support frame 13 (the transmission of vibration due to the influence of the vibration) can be suppressed, and the vibration of the first support frame 13 can be prevented.

混練機１において、混練ロータ２のウォータエンド側（ＷＥ側）を延設して、延設部１０に加重部材１１を設けることは、混練機１の大型化を招いたり、混練機１の停止時においては第１軸受部５の荷重が増加することになるが、本発明では、混練ロータ２が回転したときの混練ロータ２の加振によって生じる慣性力を考慮して（混練機１の運転時を考慮して）、敢えて混練ロータ２を延設した上で加振によって生じる慣性力により発生していた第１軸受部５への加重を打ち消すための加重部材１１を設けている。   In the kneading machine 1, extending the water end side (WE side) of the kneading rotor 2 and providing the weight member 11 in the extended portion 10 leads to an increase in the size of the kneading machine 1 or the stop of the kneading machine 1. In some cases, the load on the first bearing portion 5 increases, but in the present invention, the inertial force generated by the vibration of the kneading rotor 2 when the kneading rotor 2 rotates is taken into account (operation of the kneading machine 1). In consideration of the time), the weighting member 11 is provided to cancel the weighting applied to the first bearing portion 5 generated by the inertial force generated by the vibration after the kneading rotor 2 is extended.

図３は、コンピュータシュミュレーションを行うべく図１に示した混練機１（３翼の２軸混練機）をモデル化したものである。図３のモデルでは、各混練ロータ２を梁で表現している。軸受部７は、軸方向の移動と軸廻りの回転を不可能とする固定端（ＤＥ２）として表現されている。また、混練ロータ２の長さは６．３ｍであり、ＷＥ〜ＤＥ１の距離は５．１ｍ、ＤＥ１〜ＤＥ２の距離は１．２ｍである。混練ロータ２表す梁の略中央部には、加振力１００００ｋｇｆが加えられる。延設部の長さは１．０ｍであり、その延設部に０〜５００ｋｇｆの加重部材を設けている。このように表現されたモデル（方程式群）を差分法等などの数値解法により解いた。   FIG. 3 is a model of the kneader 1 shown in FIG. 1 (a three-blade biaxial kneader) for computer simulation. In the model of FIG. 3, each kneading rotor 2 is represented by a beam. The bearing portion 7 is expressed as a fixed end (DE2) that cannot move in the axial direction and cannot rotate around the shaft. The length of the kneading rotor 2 is 6.3 m, the distance from WE to DE1 is 5.1 m, and the distance from DE1 to DE2 is 1.2 m. An excitation force of 10,000 kgf is applied to the approximate center of the beam representing the kneading rotor 2. The length of the extended portion is 1.0 m, and a weight member of 0 to 500 kgf is provided in the extended portion. The model (equation group) expressed in this way was solved by a numerical solution method such as a difference method.

図４、図５は、図３のモデルを用いて混練ロータ２を加振したときの各軸受部にかかる荷重をコンピュータシュミュレーションにより求めたものである。
図４に示すように、延設部１０に加重を設けない場合（０ｋｇ）、第１軸受部５、第２軸受部６、第３軸受部７に掛かる荷重（軸受荷重）は大きいが、延設部１０に設けた加重部材１１の質量を大きくすればするほど第１軸受部５、第２軸受部６、第３軸受部７に掛かる軸受荷重が減少する傾向にある。 4 and 5 are obtained by computer simulation of the load applied to each bearing portion when the kneading rotor 2 is vibrated using the model of FIG.
As shown in FIG. 4, when no load is applied to the extended portion 10 (0 kg), the load (bearing load) applied to the first bearing portion 5, the second bearing portion 6, and the third bearing portion 7 is large. As the mass of the weight member 11 provided in the installation portion 10 is increased, the bearing load applied to the first bearing portion 5, the second bearing portion 6, and the third bearing portion 7 tends to decrease.

さて、混練機１の混練ロータ２の回転数（運転回転数）は、大凡、３６０〜１０００ｒｐｍ程度であり、図４に示すように、周波数に置き換えると、１８Ｈｚ〜４８Ｈｚ（約２０Ｈｚ〜４０Ｈｚ）である。
ここで、図４及び図５に示すように、運転回転数に対応する周波数（２０Ｈｚ〜４０Ｈｚ）に着目すると、第１軸受部５では、加重部材１１の質量が３００ｋｇ以上であると、特に、軸受荷重を抑えることができる。加重部材１１の質量が３００ｋｇであれば、加重部材１１を設けない場合（０ｋｇ）に比べ、第１軸受部５にかかる軸受加重を１／２にすることができる。なお、周波数が２０Ｈｚ〜４０Ｈｚの範囲においては、加重部材１１の質量を５００ｋｇにすると最も第１軸受部５に掛かる軸受加重を小さくすることができるが、周波数が４０Ｈｚ前後では、第１軸受部５の軸受加重が若干増えている。このことから、仮に周波数が４０Ｈｚ前後となる範囲にて混練機１を運転する場合には、加重部材１１の質量は３００ｋｇにすることが好ましい。 Now, the rotation speed (operation rotation speed) of the kneading rotor 2 of the kneading machine 1 is about 360 to 1000 rpm, and when it is replaced with a frequency as shown in FIG. 4, it is 18 Hz to 48 Hz (about 20 Hz to 40 Hz). is there.
Here, as shown in FIGS. 4 and 5, focusing on the frequency (20 Hz to 40 Hz) corresponding to the operating rotational speed, in the first bearing portion 5, when the mass of the weight member 11 is 300 kg or more, Bearing load can be suppressed. If the mass of the weight member 11 is 300 kg, the bearing load applied to the first bearing portion 5 can be halved compared to the case where the weight member 11 is not provided (0 kg). In the frequency range of 20 Hz to 40 Hz, when the weight of the weight member 11 is 500 kg, the bearing load applied to the first bearing portion 5 can be reduced most. However, when the frequency is around 40 Hz, the first bearing portion 5 is reduced. The bearing load is slightly increased. For this reason, if the kneader 1 is operated in a range where the frequency is around 40 Hz, the weight of the weight member 11 is preferably 300 kg.

本発明の混練機１によれば、ケーシング３内に設けられた混練ロータ２と、この混練ロータ２を回転自在に支持する軸受と、混練ロータ２に回転駆動を付与する駆動装置４とを備え、混練ロータ２において駆動装置４とは反対側を軸芯方向に延設し、この延設部１０に混練時での混練ロータ２の加振によって発生する慣性力により生じる第１軸受部５の荷重を低減させる加重部材１１を設けている。   According to the kneading machine 1 of the present invention, the kneading rotor 2 provided in the casing 3, a bearing that rotatably supports the kneading rotor 2, and a drive device 4 that applies rotational driving to the kneading rotor 2 are provided. The opposite side of the kneading rotor 2 from the drive device 4 extends in the axial direction, and the first bearing portion 5 is generated by the inertia force generated by the vibration of the kneading rotor 2 during kneading. A weight member 11 for reducing the load is provided.

これによれば、混練を行った際に、混練ロータ２に１次モードの振動が発生したとしても第１軸受部５に掛かる荷重が少なくなり（第１軸受部５が慣性力が略０の振動の節になる）、その結果、第１軸受部５から第１支持フレーム１３への慣性力、即ち、加振の影響による振動の伝達を抑えることができ、第１支持フレーム１３の振動を防止することができる。また、混練時における第１軸受部５にかかる荷重を抑えられるために、第１軸受部５の寿命を長くすることができる。   According to this, when kneading is performed, even if primary mode vibration is generated in the kneading rotor 2, the load applied to the first bearing portion 5 is reduced (the inertia force of the first bearing portion 5 is substantially zero). As a result, the inertial force from the first bearing portion 5 to the first support frame 13, that is, the transmission of vibration due to the influence of vibration can be suppressed, and the vibration of the first support frame 13 can be reduced. Can be prevented. Moreover, since the load concerning the 1st bearing part 5 at the time of kneading | mixing can be suppressed, the lifetime of the 1st bearing part 5 can be lengthened.

なお、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。   The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

１ 混練機
２ 混練ロータ
３ ケーシング
４ 駆動装置
５ 第１軸受部
６ 第２軸受部
７ 第３軸受部
８ 混練部
９ 混練室
１０ 延設部
１１ 加重部材
１２ バレル
１３ 第１支持フレーム
１４ 第２支持フレーム
１５ 第３支持フレーム
１７ ホッパ
１８ 混練度調整部
２０ 設置台
２１ 連結部材
２２ スクリュ部
２３ａ ウォータエンド側の軸部
２３ｂ ドライブエンド側の軸部 DESCRIPTION OF SYMBOLS 1 Kneading machine 2 Kneading rotor 3 Casing 4 Drive device 5 1st bearing part 6 2nd bearing part 7 3rd bearing part 8 Kneading part 9 Kneading chamber 10 Extension part 11 Weighting member 12 Barrel 13 1st support frame 14 2nd support Frame 15 Third support frame 17 Hopper 18 Kneading degree adjusting part 20 Installation base 21 Connecting member 22 Screw part 23a Shaft part on the water end side 23b Shaft part on the drive end side

Claims (2)

ケーシング内に設けられた混練ロータと、この混練ロータを回転自在に支持する軸受と、前記混練ロータに回転駆動を付与する駆動装置とを備えた混練機であって、
前記混練ロータにおいて前記駆動装置とは反対側を軸芯方向に延設し、この延設部に混練時に発生する前記混練ロータの慣性力による前記軸受の荷重を低減させる加重部材を設けたことを特徴とする混練機。 A kneading machine comprising a kneading rotor provided in a casing, a bearing that rotatably supports the kneading rotor, and a driving device that applies rotational driving to the kneading rotor,
In the kneading rotor, a side opposite to the driving device is extended in the axial direction, and a load member for reducing the load of the bearing due to the inertial force of the kneading rotor generated during kneading is provided in the extended portion. A kneading machine. 前記加重部材の重量は、前記軸受間の混練ロータの質量に基づいて求めることを特徴とする請求項１に記載の混練機。   The kneading machine according to claim 1, wherein the weight of the weight member is obtained based on a mass of a kneading rotor between the bearings.
JP2009238537A 2009-10-15 2009-10-15 Kneading machine Expired - Fee Related JP5164955B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014172203A (en) * 2013-03-06 2014-09-22 Kobe Steel Ltd Vibration control mechanism for twin screw extruder
JP2016028877A (en) * 2014-07-14 2016-03-03 株式会社神戸製鋼所 Method for obtaining rotor load generating in kneading rotor of kneader, rotor load calculation device, and kneader

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JPH06273254A (en) * 1993-03-18 1994-09-30 Hitachi Ltd Calculation of equivalent corrected weight of elastic rotor
JPH1051999A (en) * 1996-08-06 1998-02-20 Sumitomo Heavy Ind Ltd Geared motor adopting inner-gearing planetary gear structure
JPH10138234A (en) * 1996-11-14 1998-05-26 Kobe Steel Ltd Biaxial continuous kneading machine and its material kneading method
JP2005007658A (en) * 2003-06-17 2005-01-13 Kobe Steel Ltd Continuous kneading apparatus and its operating method
JP2005138234A (en) * 2003-11-07 2005-06-02 Sony Corp Manufacturing method for three-dimensional structure, and three-dimensional structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06273254A (en) * 1993-03-18 1994-09-30 Hitachi Ltd Calculation of equivalent corrected weight of elastic rotor
JPH1051999A (en) * 1996-08-06 1998-02-20 Sumitomo Heavy Ind Ltd Geared motor adopting inner-gearing planetary gear structure
JPH10138234A (en) * 1996-11-14 1998-05-26 Kobe Steel Ltd Biaxial continuous kneading machine and its material kneading method
JP2005007658A (en) * 2003-06-17 2005-01-13 Kobe Steel Ltd Continuous kneading apparatus and its operating method
JP2005138234A (en) * 2003-11-07 2005-06-02 Sony Corp Manufacturing method for three-dimensional structure, and three-dimensional structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014172203A (en) * 2013-03-06 2014-09-22 Kobe Steel Ltd Vibration control mechanism for twin screw extruder
JP2016028877A (en) * 2014-07-14 2016-03-03 株式会社神戸製鋼所 Method for obtaining rotor load generating in kneading rotor of kneader, rotor load calculation device, and kneader

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