JPH1128722A - Biaxially kneading extruder and screw used therefor - Google Patents
Biaxially kneading extruder and screw used thereforInfo
- Publication number
- JPH1128722A JPH1128722A JP9186594A JP18659497A JPH1128722A JP H1128722 A JPH1128722 A JP H1128722A JP 9186594 A JP9186594 A JP 9186594A JP 18659497 A JP18659497 A JP 18659497A JP H1128722 A JPH1128722 A JP H1128722A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- kneading
- feed blade
- rotor
- twin
- 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
Links
Classifications
-
- 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
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
- B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in 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
-
- 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
- B29C48/55—Screws having reverse-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
- B29C48/36—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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二軸混練押出機及
びこれに用いるスクリュに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twin screw extruder and a screw used therefor.
【０００２】[0002]
【従来の技術】熱可塑性樹脂等を連続混練する際に用い
る二軸混練押出機は、例えば図５に模式的に示すように
装置本体５１のチャンバ５２内に、互い平行して二本の
スクリュ５３（横並び状であるので図面上は手前側１本
だけが見えている）が回転可能に設けられたものであ
る。2. Description of the Related Art A twin-screw kneading extruder used for continuous kneading of a thermoplastic resin or the like includes, for example, two screws in parallel in a chamber 52 of an apparatus main body 51 as schematically shown in FIG. 53 (only one near side is visible in the drawing because it is horizontally arranged) is rotatably provided.
【０００３】装置本体５１には、その一端寄りに樹脂材
料用の供給口５５が設けられ、他端寄りに取出部５６が
設けられ、また中途部にベント口５７が設けられている
のが普通であり、これに対してスクリュ５３には、ベン
ト口５７より上流側に第１混練部５８が設けられ、また
ベント口５７より下流側に第２混練部５９が設けられて
いるものがある。The main body 51 of the apparatus is generally provided with a supply port 55 for a resin material near one end, a take-out portion 56 near the other end, and a vent port 57 halfway. On the other hand, some screws 53 have a first kneading section 58 provided upstream of the vent port 57 and a second kneading section 59 provided downstream of the vent port 57.
【０００４】ところで、樹脂材料と一緒に投入する粉体
状充填剤（フィラー）には、その傾向として微粉化、高
充填化されつつあり、このような材料は嵩比重が小さ
く、噴流性が強く、また混練後には高粘性流体化する特
性を有しているといった事情がある。そこで本出願人
は、スクリュ５３に対して、第１混練部５８より上流側
（供給口５５までの部位）に加熱圧縮部６２を設ける技
術を提案している（特願平３−２３３３０１号公報参
照：以下、先願技術と言う）。[0004] By the way, powdery fillers (fillers) to be charged together with resin materials tend to be pulverized and highly filled, and such materials have a low bulk specific gravity and a strong jet flow property. In addition, there is a situation that after the kneading, it has a property of becoming a highly viscous fluid. In view of this, the present applicant has proposed a technique in which a heating and compression unit 62 is provided on the screw 53 upstream of the first kneading unit 58 (a part up to the supply port 55) (Japanese Patent Application No. 3-233301). Reference: Hereinafter referred to as prior application technology).
【０００５】この加熱圧縮部６２は、文字通り、樹脂材
料及び充填剤（以下、「被混練物」と言う）に圧縮を加
えつつ、同時にヒータ６３によって加熱するもので、被
混練物に巻き込まれたエアや吸着揮発物等の分離を促進
すると共に、被混練物のかさ比重を大きくし、且つ軸方
向の推力を強めて、その結果として取出部５６での吐出
能力を高めるようにしている。The heating / compressing section 62 literally applies heat to the resin material and the filler (hereinafter, referred to as "kneaded material") while simultaneously heating the resin material and the filler (hereinafter referred to as "kneaded material") by the heater 63. Separation of air, adsorbed volatiles, and the like is promoted, and the bulk specific gravity of the material to be kneaded is increased, and the thrust in the axial direction is increased. As a result, the discharge capacity of the extraction unit 56 is increased.
【０００６】一方、可塑化及び混練を強める目的で、第
１混練部５８や第２混練部５９等として、順送り方向の
推力を生じる送り翼６５と、これの逆方向の推力を生じ
る戻し翼６６との双方を具備させる技術が、各種提案さ
れている（特公平１−１４６７２３号公報、特公昭６２
−３３０５８号公報、特表平８−５０３８９７号公報等
参照）。On the other hand, for the purpose of enhancing plasticization and kneading, the first kneading section 58 and the second kneading section 59 are provided with a feed blade 65 for generating a thrust in the forward direction and a return blade 66 for generating a thrust in the reverse direction. Various technologies have been proposed to provide both of them (Japanese Patent Publication No. 1-146723, Japanese Patent Publication No. Sho 62).
JP-A-33058 and JP-A-8-503897).
【０００７】[0007]
【発明が解決しようとする課題】先願技術において、加
熱圧縮部６２は、例えば第１混練部５８が有する圧縮作
用と可塑化溶融作用とのうち、圧縮作用の部分を分離独
立させるという構成によって成立させることもできる
が、十分な効果を得るには、やはりこの第１混練部５８
とは別に、加熱圧縮部６２を新設するのが好適とされ
る。In the prior art, the heating / compressing section 62 has a structure in which, for example, the compression action portion of the first kneading section 58 has a compression action portion which is separated and independent. Although it can be established, in order to obtain a sufficient effect, the first kneading section 58
Separately, it is preferable to newly provide the heating / compression unit 62.
【０００８】そのため、装置全体として軸方向へ幾らか
延長させる必要が生じ、設置面積やランニングコスト等
の面でやや難点があった。なお、この先願技術では、充
填剤として、鱗片形状で比表面積が大きいものや摩擦力
が極めて小さいものには不向きであるという一面があっ
た。一方、その他の開示技術として、第１混練部５８や
第２混練部５９等に、送り翼６５と戻し翼６６との双方
を設けるようにしたものでは、当然のことながら、被混
練物に対する推力の打ち消し作用が生じるために、特に
第１混練部５８においては被混練物に対する背圧を低下
させ、その後の送り作用や混練作用等に多大な悪影響を
及ぼすことになり、従って取出部５６での吐出能力を低
下させるという欠点に繋がっていた。For this reason, it is necessary to extend the entire device in the axial direction to some extent, and there have been some difficulties in terms of installation area, running cost, and the like. In addition, in this prior application technique, there was one aspect that it was not suitable for a filler having a scale-shaped large specific surface area or a very small frictional force as a filler. On the other hand, as another disclosed technique, both the feed blade 65 and the return blade 66 are provided in the first kneading section 58, the second kneading section 59, and the like. In particular, in the first kneading section 58, the back pressure against the material to be kneaded is reduced, and the subsequent feeding action, kneading action, and the like are greatly affected. This has led to the disadvantage of lowering the discharge performance.
【０００９】本発明は、上記事情に鑑みてなされたもの
であって、先願技術における装置延長化による不都合を
解消すると共に、不向きとなる充填剤が無いようにし、
そのうえで吐出能力を更に一層、高められるようにした
二軸混押出機及びこれに用いるスクリュを提供すること
を目的とする。The present invention has been made in view of the above circumstances, and eliminates the inconvenience of extending the apparatus in the prior application, and eliminates the use of unsuitable fillers.
It is another object of the present invention to provide a twin-screw extruder and a screw used for the twin-screw extruder, which can further increase the discharge capacity.
【００１０】[0010]
【課題を解決するための手段】本発明では、上記目的を
達成するために、次の技術的手段を講じた。即ち、本発
明に係る二軸混練押出機では、各スクリュにおいて、ベ
ント口と供給口との間に設けられる混練部のロータを、
送り翼のみによって構成するものとし、且つこの送り翼
は、ロータ直径に相当する軸方向領域でのねじり角を１
４０°以上に形成するものとしている。According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, in the twin-screw kneading extruder according to the present invention, in each screw, the rotor of the kneading section provided between the vent port and the supply port,
The feed wing shall be constituted only by a feed wing, and the feed wing has a twist angle of 1 in an axial region corresponding to the rotor diameter.
It is formed at an angle of 40 ° or more.
【００１１】このような構成であると、上記混練部の長
さ、ひいては装置全体としての軸方向長さをわざわざ延
長させなくても、この混練部における送り翼の最外周端
の面積を十分に拡大できることになる。従って、この送
り翼の最外周端とチャンバ内周面との隙間を被混練物が
通過する機会が増え、その結果、被混練物に対して剪断
発熱を高効率且つ迅速に生じさせることができることに
なる。従って、可塑化能力、即ち、吐出能力に優れたも
のとなる。With such a configuration, the area of the outermost end of the feed blade in the kneading section can be sufficiently increased without the need to lengthen the length of the kneading section and hence the axial length of the entire apparatus. It can be expanded. Therefore, the opportunity for the material to be kneaded to pass through the gap between the outermost end of the feed blade and the inner peripheral surface of the chamber increases, and as a result, shear heat generation can be efficiently and quickly generated for the material to be kneaded. become. Therefore, the plasticizing ability, that is, the ejection ability is excellent.
【００１２】ねじり角が１４０°に満たない場合では、
被混練物に対して作用する軸方向の背圧が不足し、十分
な推力を得られ難いことが原因して、満足した効果は得
られないことが実験により確かめられている。前記混練
部における送り翼の最外周端を軸方向に連続一体化して
おくことによっても、この最外周端とチャンバ内周面と
の間の隙間を被混練物が通過する機会が増えるので、被
混練物に対して十分な剪断発熱が与えられることにな
り、その結果、可塑化能力、即ち、吐出能力に優れたも
のとなる。When the torsion angle is less than 140 °,
It has been confirmed by experiments that satisfactory effects cannot be obtained due to insufficient axial back pressure acting on the material to be kneaded and insufficient thrust. By continuously integrating the outermost end of the feed blade in the kneading section in the axial direction, the opportunity for the material to be kneaded to pass through the gap between the outermost end and the inner peripheral surface of the chamber is increased. Sufficient shear heat is given to the kneaded material, and as a result, the plasticizing ability, that is, the discharging ability is excellent.
【００１３】前記混練部における送り翼のねじり角は、
部品加工が困難になるのを避けるうえで、３００°以下
に形成するのが好適である。The twist angle of the feed blade in the kneading section is as follows:
In order to avoid difficulties in processing parts, it is preferable to form the part at 300 ° or less.
【００１４】[0014]
【発明の実施の形態】以下、図面に基づいて本発明の実
施の形態を説明する。本発明に係る二軸混練押出機１
は、図３に模式的に示すように装置本体２のチャンバ３
内に、互い平行して二本のスクリュ４が同方向回転可能
に設けられ、装置本体２には、その一端寄りに供給口６
が設けられ、他端寄りに取出部７が設けられ、また中途
部にベント口８が設けられている。Embodiments of the present invention will be described below with reference to the drawings. Twin screw extruder 1 according to the present invention
Is a chamber 3 of the apparatus main body 2 as schematically shown in FIG.
In the inside, two screws 4 are provided so as to be rotatable in the same direction in parallel with each other.
Is provided, a take-out part 7 is provided near the other end, and a vent port 8 is provided halfway.
【００１５】これに対してスクリュ４には、装置本体２
のベント口８より上流側の第１混練部１０とベント口８
より下流側の第２混練部１１とが設けられ、これらの相
互間及び両端部にそれぞれフィード部１３，１４，１５
が設けられている。そして、第１混練部１０寄りの端部
が回転駆動装置（図示略）に接続されている。従って、
装置本体２の供給口６では、スクリュ４の一端寄りへ向
けて樹脂材料及び粉体状充填剤を投入可能になってお
り、装置本体２のベント口８では、スクリュ４の第１混
練部１０で被混練物から分離されたエアや吸着揮発物等
を吸引除去できるようになっており、装置本体２の取出
部７では、スクリュ４の第２混練部１１によって最終混
練された後の樹脂を吐出できるようになっている。On the other hand, the screw 4 includes the device main body 2.
Kneading section 10 upstream of vent port 8 and vent port 8
A second kneading section 11 on the further downstream side is provided, and feed sections 13, 14, and 15 are provided between and at both ends thereof.
Is provided. The end near the first kneading unit 10 is connected to a rotation driving device (not shown). Therefore,
At the supply port 6 of the apparatus main body 2, a resin material and a powdery filler can be introduced toward one end of the screw 4, and at the vent port 8 of the apparatus main body 2, the first kneading section 10 of the screw 4 Air and adsorbed volatiles separated from the material to be kneaded can be removed by suction. The resin 7 after the final kneading by the second kneading unit 11 of the screw 4 is taken out by the take-out unit 7 of the apparatus main body 2. It can be ejected.
【００１６】スクリュ４において、第１混練部１０や第
２混練部１１は、図１に示すように三角形状の三辺を外
膨れアールとした中空の断面形状を有するロータ１７
と、このロータ１７をスプライン嵌合によって保持する
中軸１８とによって構成されている。従ってロータ１７
まわりには、三等配位置に、最も突出する最外周端（以
下、「チップ部２０」と言う）が形成されていることに
なり、これらチップ部２０とチャンバ３の内周面との隙
間δで、被混練物が大きな剪断力を受けて混練されるこ
とになる。In the screw 4, the first kneading section 10 and the second kneading section 11 are, as shown in FIG. 1, a rotor 17 having a hollow cross-sectional shape having three triangular sides bulging outward.
And a center shaft 18 that holds the rotor 17 by spline fitting. Therefore, the rotor 17
Around the periphery, the most protruding outermost ends (hereinafter, referred to as “tip portions 20”) are formed at three equally spaced positions, and a gap between these tip portions 20 and the inner peripheral surface of the chamber 3 is formed. At δ, the material to be kneaded is subjected to a large shearing force and is kneaded.
【００１７】そして、第１混練部１０を構成するロータ
１７においては、図１及び図２に示すように上記チップ
部２０が、被混練物に対して順送り推力を与える方向へ
のみ捩じられることにより、送り翼２２のみが設けられ
たものとしてある。すなわち、この第１混練部１０にお
いて、順送り方向とは逆向きの推力を与える戻し翼は一
切、設けられていない。In the rotor 17 constituting the first kneading section 10, as shown in FIGS. 1 and 2, the tip section 20 is twisted only in a direction for applying a forward thrust to the material to be kneaded. Thus, only the feed wings 22 are provided. That is, in the first kneading section 10, no return wing for providing a thrust in a direction opposite to the forward feed direction is provided.
【００１８】この送り翼２２は、ロータ１７の直径Ｄに
相当する軸方向領域Ｌ1 （即ち、Ｄ＝Ｌ1 ）でのねじり
角θが１４０°以上３００°以下となるように形成され
ている。従って、第１混練部１０の全体長さとしては、
上記軸方向領域Ｌ1 の整数倍（ｎＬ1 ：ｎ＝１を含む）
とするのが好適となる。ねじり角θの上記適正範囲は、
次のようにして決定してある。The feed vane 22 is formed such that the torsion angle θ in the axial region L 1 (that is, D = L 1 ) corresponding to the diameter D of the rotor 17 is 140 ° or more and 300 ° or less. . Therefore, as the overall length of the first kneading unit 10,
An integral multiple of the axial region L 1 (nL 1: including n = 1)
It is preferable that The appropriate range of the torsion angle θ is
It is determined as follows.
【００１９】すなわち、被混練物に作用する軸方向の背
圧は、被混練物の配合比率や配合種、或いは第１混練部
１０の長さ等、各種の諸条件によって変化する。そこ
で、その低背圧時を５ｋｇ／ｃｍ2 、高背圧時を４０ｋ
ｇ／ｃｍ2 と設定して、被混練物に低背圧を付加させた
場合と高背圧を付加させた場合とで、ねじり角θと送り
量との間にどのような関係が生ずるのかを調べた。その
結果を図４に示す。That is, the axial back pressure acting on the material to be kneaded changes depending on various conditions such as the mixing ratio and the kind of the material to be kneaded, or the length of the first kneading section 10. Therefore, the low back pressure is 5 kg / cm 2 and the high back pressure is 40 k / cm 2 .
g / cm 2, and what kind of relationship occurs between the twist angle θ and the feed amount when a low back pressure and a high back pressure are applied to the material to be kneaded. Was examined. FIG. 4 shows the results.
【００２０】なお、この図４は、高背圧時においてねじ
り角θを３００°としたときの値を「１」として指数表
示したものである。この図４から明らかなように、ねじ
り角θが１４０°以下では、高背圧時において推力が殆
ど得られていないことが判る。従って、この理由によ
り、ねじり角θの適正範囲下限を１４０°に決めてい
る。In FIG. 4, the value when the torsion angle θ is 300 ° at a high back pressure is indicated as an index with the value being “1”. As is apparent from FIG. 4, when the torsion angle θ is 140 ° or less, almost no thrust is obtained at high back pressure. Therefore, for this reason, the appropriate range lower limit of the torsion angle θ is determined to be 140 °.
【００２１】また、低背圧時ではねじり角θが２００°
のときが最も高推力となり、高背圧時ではねじり角θが
３００°のときが最も高推力となっている。そのため、
この２００°〜３００°の範囲を中心として小角度側及
び大角度側へある程度の幅を持たせたいところである
が、ねじり角θが３００°を超えると部品加工が困難と
なるということがある。従って、この理由により、ねじ
り角θの適正範囲上限を３００°に決めている。When the back pressure is low, the torsion angle θ is 200 °.
Is the highest thrust, and at high back pressure, the highest thrust is when the torsion angle θ is 300 °. for that reason,
It is desired that the small angle side and the large angle side have a certain width around the range of 200 ° to 300 °, but if the torsion angle θ exceeds 300 °, it may be difficult to process parts. Therefore, for this reason, the upper limit of the appropriate range of the torsion angle θ is determined to be 300 °.
【００２２】なお、このロータ１７は、第１混練部１０
の全長にわたる一体のものとして形成するか、又は第１
混練部１０の全長を整数分割した相互連結が可能な短尺
体（例えば上記軸方向領域Ｌ1 に等しいもの）として形
成するかは、適宜変更可能である。ただ、いずれの場合
でも送り翼２２は、そのチップ部２０が第１混練部１０
の全長にわたって連続一体化するように形成しておくの
が、上記隙間δに対して被混練物の通過機会が増える点
で好適となる。The rotor 17 is provided in the first kneading section 10.
Formed as one piece over the entire length of the
Whether to form the full length of the kneading section 10 as an integer divided interconnected capable short body (e.g. equal to the axial region L 1), can be changed as appropriate. However, in any case, the feed blade 22 has the tip portion 20 that is the first kneading portion 10.
Is preferably formed in such a manner as to be continuously integrated over the entire length in that the opportunity for the kneaded material to pass through the gap δ increases.
【００２３】なお、第２混練部１１においては、例えば
図３に示したように必要に応じて送り翼２５と戻し翼２
６との双方を具備した構成にしてもよい。In the second kneading section 11, for example, as shown in FIG.
6 may be provided.
【００２４】[0024]
【実施例】上記構成を実施した二軸押出混練機１（神戸
製鋼所：機種名ＫＴＸ５９）と、図５に示した構成の従
来技術の二軸押出混練機とで、実際に樹脂材料と充填剤
とを投入してその吐出能力についての比較試験を行っ
た。その結果を表１に示す。EXAMPLE A resin material was actually filled in a twin-screw extruder kneader 1 (Kobe Steel Works, model name KTX59) having the above configuration and a conventional twin-screw extruder kneader having a configuration shown in FIG. And a comparative test was conducted on the discharge capacity of the mixture. Table 1 shows the results.
【００２５】[0025]
【表１】 [Table 1]
【００２６】いずれもスクリュ４は、片持ち構造とさ
れ、噛合・同方向回転するものであって、ロータ１７の
直径Ｄは５９ｍｍとした。また、使用樹脂はＭＩ（メル
トインデックス）が９．０のＰＰとし、充填剤にはタル
クを用いた。タルクは、鱗片形状で比表面積が大きく、
また摩擦力が極めて小さくなる特性を有している。In each case, the screw 4 has a cantilever structure, meshes and rotates in the same direction, and the diameter D of the rotor 17 is 59 mm. The resin used was PP having an MI (melt index) of 9.0, and talc was used as a filler. Talc is scale-shaped and has a large specific surface area.
Further, it has a characteristic that the frictional force becomes extremely small.
【００２７】なお、表１中において、「ベント口までの
Ｌ／Ｄ」として表示しているなかのＬは、上記した軸方
向領域Ｌ1 ではなく、図３に示すような供給口６とベン
ト口８との中心間距離である。表１から明らかなよう
に、本発明では、装置全体としての長大化を伴わず、ま
た場合によっては短小化をも可能にしたうえで、いずれ
も被混練物の吐出量を高めることができるものであっ
た。[0027] Note that in Table 1, L of among that displayed as "L / D of up to vent port", rather than axial region L 1 described above, a supply port 6, as shown in FIG. 3 Vent This is the distance between the center and the mouth 8. As is clear from Table 1, in the present invention, it is possible to increase the discharge amount of the material to be kneaded, without increasing the overall length of the apparatus and, in some cases, by shortening the apparatus. Met.
【００２８】ところで、本発明は上記各実施形態に限定
されるものではない。例えば、第１混練部１０における
送り翼２２のねじり角θは、被混練物の配合比率や配合
種、或いは第１混練部１０の長さやロータ直径Ｄ等によ
り、適正範囲内で適宜変更可能であることは言うまでも
ない。装置本体２において、ベント口８の増設やダム装
置（図示略）の付設等は可能であり、またスクリュ４に
おいても、第１混練部１０及び第２混練部１１以外に、
更に別の混練部を増設してもよい。The present invention is not limited to the above embodiments. For example, the torsion angle θ of the feed blade 22 in the first kneading unit 10 can be appropriately changed within an appropriate range depending on the mixing ratio and the mixing type of the material to be kneaded, or the length and the rotor diameter D of the first kneading unit 10. Needless to say, there is. In the device main body 2, it is possible to add a vent port 8, attach a dam device (not shown), and the like. In the screw 4, in addition to the first kneading unit 10 and the second kneading unit 11,
Still another kneading section may be added.
【００２９】ロータ１７として、一断面あたりのチップ
部２０（即ち、送り翼２２）の形成数を２以下としたり
４以上としたりすることも可能である。As the rotor 17, the number of the tip portions 20 (that is, the feed blades 22) formed per cross section can be set to 2 or less or 4 or more.
【００３０】[0030]
【発明の効果】以上の説明で明らかなように、本発明に
係る二軸混練押出機では、装置全体としての延長化を防
止しつつ、様々な特性を有する各種の充填剤を用いた場
合でも、一様に高吐出能力を実現できるようになった。As is apparent from the above description, in the twin-screw kneading extruder according to the present invention, even if various fillers having various characteristics are used while preventing the entire apparatus from being lengthened. Thus, a high discharge capability can be realized uniformly.
【図１】図３のＡ−Ａ線拡大断面図である。FIG. 1 is an enlarged cross-sectional view taken along line AA of FIG.
【図２】図１の断面部位に対応する側面図である。FIG. 2 is a side view corresponding to the cross-sectional portion of FIG.
【図３】本発明に係る二軸混練押出機を模式的に示した
側断面図である。FIG. 3 is a side sectional view schematically showing a twin-screw kneading extruder according to the present invention.
【図４】ねじり角の適正範囲を決定する根拠を示したグ
ラフである。FIG. 4 is a graph showing a basis for determining an appropriate range of a torsion angle.
【図５】従来の二軸混練押出機を模式的に示した側断面
図である。FIG. 5 is a side sectional view schematically showing a conventional twin-screw kneading extruder.
１ 二軸混練押出機 ２ 装置本体 ３ チャンバ ４ スクリュ ６ 供給口 ８ ベント口 １０ 第１混練部 １１ 第２混練部 １７ ロータ ２２ 送り翼 Ｄ ロータ直径 Ｌ1 軸方向領域 θ ねじり角REFERENCE SIGNS LIST 1 twin-screw kneading extruder 2 apparatus main body 3 chamber 4 screw 6 supply port 8 vent port 10 first kneading section 11 second kneading section 17 rotor 22 feed blade D rotor diameter L 1 axial direction area θ torsion angle
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｃ 47/76 Ｂ２９Ｃ 47/76 (72)発明者 上村 達哉 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 三宅 綱一 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──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. 6 Identification symbol FI B29C 47/76 B29C 47/76 (72) Inventor Tatsuya Uemura 2-3-1 Shinhama, Araimachi, Takasago City, Hyogo Prefecture Kobe Steel, Ltd. Inside Takasago Works (72) Inventor Tsunaichi Miyake 2-3-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside Kobe Steel Works Takasago Works
Claims (6)
い平行する二本のスクリュ（４）が同方向回転可能に設
けられ、装置本体（２）にはスクリュ（４）の一端寄り
に対応する樹脂材料及び粉体状充填剤の共通の供給口
（６）とスクリュ（４）の中途部に対応するベント口
（８）とが設けられ、各スクリュ（４）には少なくとも
ベント口（８）と供給口（６）との間に混練部（１０）
が設けられた二軸混練押出機において、 上記混練部（１０）に設けられるロータ（１７）が送り
翼（２２）のみによって構成されており、該送り翼（２
２）は、ロータ直径（Ｄ）に相当する軸方向領域
（Ｌ1 ）でのねじり角（θ）が１４０°以上に形成され
ていることを特徴とする二軸混練押出機。1. Two parallel screws (4) are provided in a chamber (3) of an apparatus main body (2) so as to be rotatable in the same direction, and the apparatus main body (2) is located near one end of the screw (4). A common supply port (6) for the resin material and the powdery filler corresponding to the above and a vent port (8) corresponding to the middle of the screw (4) are provided, and each screw (4) has at least a vent port. Kneading section (10) between (8) and supply port (6)
The rotor (17) provided in the kneading section (10) is constituted only by the feed blade (22), and the feed blade (2) is provided.
2) A twin-screw kneading extruder characterized in that a torsion angle (θ) in an axial region (L 1 ) corresponding to a rotor diameter (D) is formed to be 140 ° or more.
２）の最外周端が軸方向に連続一体化されていることを
特徴とする請求項１記載の二軸混練押出機。2. A feed blade (2) in said kneading section (10).
2. The twin-screw kneading extruder according to claim 1, wherein the outermost end of 2) is continuously integrated in the axial direction.
２）のねじり角（θ）が３００°以下に形成されている
ことを特徴とする請求項１又は請求項２記載の二軸混練
押出機。3. A feed blade (2) in said kneading section (10).
The twin-screw kneading extruder according to claim 1 or 2, wherein the twist angle (θ) of 2) is formed to be 300 ° or less.
ロータ（１７）を有する混練部（１０）を軸方向中途部
に設けている二軸混練押出機に用いるスクリュであっ
て、前記送り翼（２２）は、ロータ直径（Ｄ）に相当す
る軸方向領域（Ｌ1 ）でのねじり角（θ）が１４０°以
上に形成されていることを特徴とする二軸混練押出機に
用いるスクリュ。4. A screw used for a twin-screw kneading extruder provided with a kneading section (10) having a rotor (17) constituted only by a feed blade (22) at an intermediate portion in the axial direction, wherein the feed blade is provided. (22) A screw used for a twin-screw kneading extruder, wherein a torsion angle (θ) in an axial region (L 1 ) corresponding to a rotor diameter (D) is formed to be 140 ° or more.
２）の最外周端が軸方向に連続一体化されていることを
特徴とする請求項４記載の二軸混練押出機に用いるスク
リュ。5. A feed blade (2) in said kneading section (10).
The screw used for the twin-screw kneading extruder according to claim 4, wherein the outermost peripheral end of (2) is continuously integrated in the axial direction.
２）のねじり角（θ）が３００°以下に形成されている
ことを特徴とする請求項４又は請求項５記載の二軸混練
押出機に用いるスクリュ。6. A feed blade (2) in said kneading section (10).
The screw used for the twin-screw kneading extruder according to claim 4 or 5, wherein the torsion angle (θ) of 2) is formed to be 300 ° or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18659497A JP3471572B2 (en) | 1997-07-11 | 1997-07-11 | Twin screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18659497A JP3471572B2 (en) | 1997-07-11 | 1997-07-11 | Twin screw extruder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1128722A true JPH1128722A (en) | 1999-02-02 |
| JP3471572B2 JP3471572B2 (en) | 2003-12-02 |
Family
ID=16191291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18659497A Expired - Lifetime JP3471572B2 (en) | 1997-07-11 | 1997-07-11 | Twin screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3471572B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012111236A (en) * | 1999-04-16 | 2012-06-14 | Cabot Corp | Method and apparatus for producing and treating novel elastomer composite material |
-
1997
- 1997-07-11 JP JP18659497A patent/JP3471572B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012111236A (en) * | 1999-04-16 | 2012-06-14 | Cabot Corp | Method and apparatus for producing and treating novel elastomer composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3471572B2 (en) | 2003-12-02 |
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