JPH0655611A - Double-screw extruder for volatilizing non-thermoplastic rubber - Google Patents
Double-screw extruder for volatilizing non-thermoplastic rubberInfo
- Publication number
- JPH0655611A JPH0655611A JP4229288A JP22928892A JPH0655611A JP H0655611 A JPH0655611 A JP H0655611A JP 4229288 A JP4229288 A JP 4229288A JP 22928892 A JP22928892 A JP 22928892A JP H0655611 A JPH0655611 A JP H0655611A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic rubber
- screw extruder
- teeth
- devolatilizing
- 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.)
- Pending
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
- B29C48/395—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＳＢＲの如く高粘度の
流動性に乏しい非熱可塑性ゴム材料の脱揮を行う非熱可
塑性ゴム脱揮用二軸押出機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-thermoplastic rubber devolatilizing twin-screw extruder for devolatilizing a high-viscosity non-thermoplastic rubber material such as SBR.
【０００２】[0002]
【従来の技術】従来の脱揮用二軸押出機２６は、図５に
示すように、上面に材料を供給する供給口２５と脱揮口
２３が設けられているバレル２２内に、可変ピッチで等
しい深さの台形ネジ２４を有して軸方向に完全噛合し異
方向に回転する２本のスクリュー２１を備えている。台
形ネジ２４のピッチは、材料供給口２５では１回転当た
りの搬送容積を大きくするために広いピッチＰ１にし
て、脱揮口２３に向かうにつれて材料の圧縮混練がよく
なされるように徐々に狭くなって、脱揮口２３手前で最
も狭いピッチＰ２にしてある。そして、脱揮口２３の部
分では圧縮混練のなされた材料の圧縮を緩め脱揮するよ
うに広いピッチＰ３であり、脱揮口２３から吐出口２２
ａに向かうにつれて材料をダイス等から押し出せるよう
に徐々に再び狭いピッチＰ４となっている。2. Description of the Related Art As shown in FIG. 5, a conventional devolatilizing twin-screw extruder 26 has a variable pitch in a barrel 22 provided with a feed port 25 for feeding a material and a devolatilizing port 23 on its upper surface. 2 has a trapezoidal screw 24 having the same depth and is completely meshed in the axial direction with two screws 21 rotating in different directions. The pitch of the trapezoidal screw 24 is set to a wide pitch P1 in the material supply port 25 in order to increase the transport volume per one rotation, and gradually narrowed toward the devolatilization port 23 so that the material is well kneaded by compression. The pitch P2 is the narrowest before the devolatilization port 23. The devolatilization port 23 has a wide pitch P3 so as to loosen the compression of the material that has been compression-kneaded and volatilize, and the devolatilization port 23 to the discharge port 22.
The pitch P4 is gradually narrowed again so that the material can be extruded from a die or the like as it goes to a.
【０００３】上述のように構成されている従来の脱揮用
二軸押出機２６は、供給口２５から連続的にバレル２２
内に材料が供給される。そして、バレル２２からの熱で
材料を加熱しつつ、スクリュー２１の回転により、材料
を移動させながら剪断及び圧縮を行う。そして、脱揮口
２３でスクリュー２１に対する材料の充満度を下げ、材
料に含まれる水分やモノマー等の不要成分を真空ポンプ
等により強制的に除去して脱揮を行う。その後、材料の
送り量を調整して吐出口２３ａから定量押出する。The conventional devolatilizing twin-screw extruder 26 configured as described above continuously feeds the barrel 22 from the supply port 25.
Material is supplied inside. Then, while the material is being heated by the heat from the barrel 22, the material is moved and sheared and compressed by the rotation of the screw 21. Then, the volatilization port 23 is used to reduce the filling degree of the material into the screw 21, and unnecessary components such as water and monomers contained in the material are forcibly removed by a vacuum pump or the like for volatilization. After that, the material feed amount is adjusted and the material is quantitatively extruded from the discharge port 23a.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、材料が
ＳＢＲの如く非熱可塑性ゴムの場合には、材料の温度が
上がっても粘度が下がらず流動性に乏しいので、従来の
脱揮用二軸押出機２６のスクリュー２１では、殆ど材料
の表面更新が得られず、十分な脱揮が行われないという
問題が生じる。そこで、周面に複数のストレートの凸条
歯を有して相互に噛合係合する混練用の歯車を転用して
スクリューに挿着し、表面更新を良くすることも考えら
れる。しかし、この混練用の歯車は材料の混練度を高め
るたのに適した形状となっており、非熱可塑性ゴムの如
く流動性に乏しい材料の表面更新を高めるためのにその
まま転用することが困難な形状になっている。However, when the material is a non-thermoplastic rubber such as SBR, the viscosity does not decrease even if the temperature of the material rises and the fluidity is poor, so that the conventional twin screw extruder for devolatilization is used. With the screw 21 of the machine 26, almost no surface renewal of the material is obtained, and there is a problem that sufficient devolatilization is not performed. Therefore, it is conceivable to use a kneading gear which has a plurality of straight convex teeth on the peripheral surface and meshes with each other and inserts the kneading gear into the screw to improve the surface renewal. However, this kneading gear has a shape suitable for increasing the kneading degree of the material, and it is difficult to divert it as it is to improve the surface renewal of a material having poor fluidity such as non-thermoplastic rubber. It has a simple shape.
【０００５】本発明は、従来の技術の有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、非熱可塑性ゴム材料の十分な脱揮が行える非熱
可塑性ゴム脱揮用二軸押出機を提供しようとするもので
ある。The present invention has been made in view of the above problems of the prior art, and an object thereof is to remove a non-thermoplastic rubber capable of sufficiently devolatilizing a non-thermoplastic rubber material. It is intended to provide a twin screw extruder for volatile matter.
【０００６】[0006]
【課題を解決するための手段】上記目的を解決するため
に、本発明の非熱可塑性ゴム脱揮用二軸押出機は、脱揮
口を有するバレル内で、回転により材料を押し出す異方
向回転完全噛合２軸スクリューと、該各スクリューの前
記脱揮口の直前の位置に挿着され、周面に複数の歯を有
して相互に噛合係合する歯車とを備えてなる非熱可塑性
ゴム脱揮用二軸押出機において、前記歯車の歯を凹凸条
の歯で形成したものである。In order to solve the above-mentioned problems, a non-thermoplastic rubber devolatilizing twin-screw extruder according to the present invention has a barrel having a devolatilizing port, in which a material is extruded by rotation in different directions. Non-thermoplastic rubber comprising a completely meshing twin-screw screw, and a gear inserted into a position immediately before the devolatilization port of each screw and having a plurality of teeth on its peripheral surface and meshingly engaged with each other. In the devolatilizing twin-screw extruder, the teeth of the gear are formed by teeth of uneven lines.
【０００７】又、前記記載の非熱可塑性ゴム脱揮用二軸
押出機において、相互に噛合係合する歯車の凹凸条の歯
の凹凸の間隔がずれているものが好ましい。Further, in the above-mentioned non-thermoplastic rubber devolatilizing twin-screw extruder, it is preferable that the tooth irregularities of the concavo-convex strips of the gears meshing with each other are displaced.
【０００８】[0008]
【作用】歯車の歯を凹凸条の歯で形成すると、スクリュ
ーの回転により、条と条の間の紐状の非熱可塑性ゴム材
料を凹凸条の歯がさいの目状に細かくみじん切りし、細
分化して表面積を大きくし、表面更新をする。また、相
互に噛合係合する歯車の凹凸条の歯の凹凸の間隔をずら
すと、みじん切りが確実に行われる。[Function] When the teeth of the gear are formed by the teeth of the uneven strips, the screw-like rotation causes the string-shaped non-thermoplastic rubber material between the strips to be finely chopped into diced teeth and then subdivided. Increase the surface area and renew the surface. Further, by shifting the intervals of the concavo-convex teeth of the concavo-convex stripes of the gears that mesh with each other, fine cutting is surely performed.
【０００９】[0009]
【実施例】本発明の実施例を図面を参照しつつ説明す
る。図１は本発明の非熱可塑性ゴム脱揮用二軸押出機６
の要部を示す図であって、スクリュー２１に挿着されて
いる歯車１・２が示されている。図２は図１のＡ−Ａ断
面図であり、図３は図１のＢ−Ｂ断面図であり、図４は
図３のＣ−Ｃ断面図である。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a twin-screw extruder 6 for devolatilizing a non-thermoplastic rubber of the present invention.
FIG. 3 is a view showing a main part of FIG. 1, in which gears 1 and 2 inserted into a screw 21 are shown. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. 4 is a sectional view taken along line CC of FIG.
【００１０】図１に示すように、本発明の非熱可塑性ゴ
ム脱揮用二軸押出機６は、各スクリュー２１の脱揮口２
３の直前の位置に、相互に噛合係合する一対の歯車１・
２が挿着されている。その他の部分は図５で説明したも
のと同様である。As shown in FIG. 1, the non-thermoplastic rubber devolatilizing twin-screw extruder 6 of the present invention has a devolatilizing port 2 of each screw 21.
A pair of gears 1 meshingly engaged with each other at a position immediately before 3.
2 is inserted. Other parts are the same as those described in FIG.
【００１１】該一対の歯車１・２ははす歯歯車であっ
て、図３に示されるように、相互に噛み合う歯３と溝４
とを有している。そして、歯３は、図２に示されるよう
に、長手方向に多数の切り欠き５が設けられた凹凸条３
となっている。さらに、図４に示すように、歯車１の切
り欠き５ａと歯車２の切り欠き５ｂとは長手方向にずら
されている。The pair of gears 1 and 2 are helical gears, and as shown in FIG. 3, teeth 3 and grooves 4 which mesh with each other.
And have. Then, as shown in FIG. 2, the tooth 3 has an uneven strip 3 provided with a large number of notches 5 in the longitudinal direction.
Has become. Further, as shown in FIG. 4, the notch 5a of the gear 1 and the notch 5b of the gear 2 are displaced in the longitudinal direction.
【００１２】上述の様に、図１の歯車１，２の歯を凹凸
条３に形成すると、スクリュー２１の回転により、溝４
に紐状に溜まっている非熱可塑性ゴム材料は凹凸条３の
歯で短冊状になり更にさいの目状に細かくみじん切りさ
れ、細分化して表面積が大きくなり、著しい表面更新が
行われる。そして、この表面更新が行われる歯車１，２
に接するように、脱揮口２３が設けられているので、表
面更新に伴って発生する水分やモノマー等の不要成分が
効率よく脱揮される。また、図４のように相互に噛合係
合する歯車１，２の凹凸条の切り欠き５ａ，５ｂの間隔
をずらせるようにすると、凹凸条同士の干渉でみじん切
りが阻害される恐れもない。As described above, when the teeth of the gears 1 and 2 of FIG.
The non-thermoplastic rubber material accumulated in the form of a strip is formed into strips by the teeth of the ridges and valleys 3 and further finely chopped into dices, and the surface area is increased by subdividing, resulting in remarkable surface renewal. Then, the gears 1 and 2 on which the surface is updated
Since the devolatilizing port 23 is provided so as to come into contact with, the unnecessary components such as water and monomers generated by the surface renewal are efficiently devolatilized. Further, as shown in FIG. 4, when the gaps between the recesses and protrusions 5a and 5b of the concavo-convex strips of the gears 1 and 2 which mesh with each other are shifted, the interference between the concavo-convex strips does not hinder the fine cutting.
【００１３】尚、実施例では、歯車を一対としたが、複
数対を直列配置したものでもよい。そして、歯車の凹凸
条の歯は実施例では、はす歯状になっているが平歯状で
もよい。Although a pair of gears is used in the embodiment, a plurality of pairs of gears may be arranged in series. In addition, the teeth of the concavo-convex stripes of the gear are helical teeth in the embodiment, but may be flat teeth.
【００１４】[0014]
【発明の効果】本発明の非熱可塑性ゴム脱揮用二軸押出
機は、歯車の歯を凹凸条の歯で形成することにより、高
粘度の流動性に乏しい非熱可塑性ゴム材料をスクリュー
の回転と共にさいの目状に細かくみじん切りし細分化す
るようにして、脱揮口の直前で表面積を大きくし著しい
表面更新を行う。その結果、非熱可塑性ゴム材料の十分
な脱揮が行われる。INDUSTRIAL APPLICABILITY The non-thermoplastic rubber devolatilizing twin-screw extruder of the present invention has a high-viscosity non-thermoplastic rubber material of high viscosity, which is formed by forming the teeth of the gears with the teeth of concave and convex lines. As it rotates, it is finely chopped into diced pieces and subdivided to increase the surface area immediately before the devolatilizing port to remarkably renew the surface. As a result, the non-thermoplastic rubber material is sufficiently devolatilized.
【図１】本発明の非熱可塑性ゴム脱揮用二軸押出機の要
部を示す図である。FIG. 1 is a view showing a main part of a non-thermoplastic rubber devolatilizing twin-screw extruder of the present invention.
【図２】図１のＡ−Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】図１のＢ−Ｂ断面図である。FIG. 3 is a sectional view taken along line BB of FIG.
【図４】図３のＣ−Ｃ断面図である。FIG. 4 is a sectional view taken along line CC of FIG.
【図５】従来の非熱可塑性ゴム脱揮用二軸押出機の全体
を示す図である。FIG. 5 is a view showing an entire conventional twin-screw extruder for devolatilizing non-thermoplastic rubber.
６ 非熱可塑性ゴム脱揮用二軸押出機 １、２ 歯車 ３ 凹凸条 ２１ スクリュー ２２ バレル ２３ 脱揮口 6 Non-thermoplastic rubber devolatilizing twin-screw extruder 1, 2 Gears 3 Concavo-convex strip 21 Screw 22 Barrel 23 Devolatilizing port
Claims (2)
材料を前方に押し出す異方向回転完全噛合２軸スクリュ
ーと、該各スクリューの前記脱揮口の直前の位置に挿着
され、周面に複数の歯を有して相互に噛合係合する歯車
とを備えてなる非熱可塑性ゴム脱揮用二軸押出機におい
て、 前記歯車の歯を凹凸条の歯で形成したことを特徴とする
非熱可塑性ゴム脱揮用二軸押出機。1. In a barrel having a devolatilizing port, a counter-rotating complete meshing twin-screw screw that pushes material forward by rotation, and a peripheral surface of each screw inserted immediately before the devolatilizing port. In a twin-screw extruder for non-thermoplastic rubber devolatilization, which comprises a gear having a plurality of teeth and meshingly engaged with each other, the teeth of the gear are formed by teeth of uneven lines. Twin screw extruder for devolatilizing non-thermoplastic rubber.
軸押出機において、相互に噛合係合する歯車の凹凸条の
歯の凹凸の間隔がずれていることを特徴とする非熱可塑
性ゴム脱揮用二軸押出機。2. The non-thermoplastic rubber devolatilizing twin-screw extruder according to claim 1, wherein the tooth irregularities of the concavo-convex strips of the gears meshingly engaged with each other are displaced from each other. Twin screw extruder for devolatilizing plastic rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4229288A JPH0655611A (en) | 1992-08-04 | 1992-08-04 | Double-screw extruder for volatilizing non-thermoplastic rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4229288A JPH0655611A (en) | 1992-08-04 | 1992-08-04 | Double-screw extruder for volatilizing non-thermoplastic rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0655611A true JPH0655611A (en) | 1994-03-01 |
Family
ID=16889777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4229288A Pending JPH0655611A (en) | 1992-08-04 | 1992-08-04 | Double-screw extruder for volatilizing non-thermoplastic rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0655611A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009008451A1 (en) * | 2007-07-09 | 2009-01-15 | The Japan Steel Works, Ltd. | Melting-kneading deaeration extruder |
| JP2011042094A (en) * | 2009-08-20 | 2011-03-03 | Japan Steel Works Ltd:The | Method and apparatus for reducing volume of raw material solution containing volatile component |
| CN111516226A (en) * | 2020-04-30 | 2020-08-11 | 福建玮晟机械有限公司 | Synthetic membrane plastify film forming device |
-
1992
- 1992-08-04 JP JP4229288A patent/JPH0655611A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009008451A1 (en) * | 2007-07-09 | 2009-01-15 | The Japan Steel Works, Ltd. | Melting-kneading deaeration extruder |
| JP2009012417A (en) * | 2007-07-09 | 2009-01-22 | Japan Steel Works Ltd:The | Melting kneading volatilizing extruder |
| US8899820B2 (en) | 2007-07-09 | 2014-12-02 | The Japan Steel Works, Ltd. | Melting kneading devolatilizing extruder |
| JP2011042094A (en) * | 2009-08-20 | 2011-03-03 | Japan Steel Works Ltd:The | Method and apparatus for reducing volume of raw material solution containing volatile component |
| CN111516226A (en) * | 2020-04-30 | 2020-08-11 | 福建玮晟机械有限公司 | Synthetic membrane plastify film forming device |
| CN111516226B (en) * | 2020-04-30 | 2021-11-12 | 福建玮晟机械有限公司 | Synthetic membrane plastify film forming device |
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