JPH0299305A - Biaxial kneader - Google Patents
Biaxial kneaderInfo
- Publication number
- JPH0299305A JPH0299305A JP63253472A JP25347288A JPH0299305A JP H0299305 A JPH0299305 A JP H0299305A JP 63253472 A JP63253472 A JP 63253472A JP 25347288 A JP25347288 A JP 25347288A JP H0299305 A JPH0299305 A JP H0299305A
- Authority
- JP
- Japan
- Prior art keywords
- barrel
- resin
- valve
- screw
- kneading
- 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
- 238000004898 kneading Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 230000008602 contraction Effects 0.000 claims 1
- 239000011347 resin Substances 0.000 abstract description 50
- 229920005989 resin Polymers 0.000 abstract description 50
- 230000001965 increasing effect Effects 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
-
- 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
- B29C48/268—Throttling of the flow, e.g. for cooperating with plasticising elements or for degassing
-
- 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
- B29C48/402—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 the screws having intermeshing parts
-
- 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
- B29C48/535—Screws with thread pitch varying along the longitudinal axis
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/687—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having projections with a short length in the barrel direction, e.g. pins
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は互いに近接して平行する一対のスクリュ軸を回
転させて樹脂等の材料を混練する2軸混練機に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a two-screw kneader for kneading materials such as resins by rotating a pair of screw shafts that are close to each other and parallel to each other.
バレル内へ供給した樹脂等を、バレル内で回転するスク
リュ軸で混練する混練機は、スクリュ軸の本数によって
単軸混練機と2軸混練機とに分類され、このうちの2軸
混練機は、理想的な混練度が得られ易いところから樹脂
の混練等に広く用いられている。Kneaders that knead resin, etc. supplied into a barrel with a screw shaft rotating inside the barrel are classified into single-screw kneaders and twin-screw kneaders depending on the number of screw shafts, and among these, two-screw kneaders are It is widely used for kneading resins, etc. because it is easy to obtain an ideal kneading degree.
この2軸混練機は、内孔を眼鏡状に形成されてこの内孔
の軸方向にフランジ接合された複数個のバレルを備えて
おり、このバレルの内JL 内には、その全長にわたる
一対のスクリュ軸が互いに近接平行して回転自在に軸支
されていて、モータで互いに同方向または異方向へ回転
駆動されている。This twin-screw kneading machine is equipped with a plurality of barrels whose inner holes are formed in the shape of glasses and which are flanged in the axial direction of the inner holes. The screw shafts are rotatably supported close to each other and parallel to each other, and are driven to rotate in the same direction or in different directions by motors.
バレル1の前部には、樹脂等の材料をバレルl内へ供給
する定量フィーダが装着されており、またバレルバルブ
の押出ノズルは、一般に造粒装置に接合されている。A metering feeder for feeding materials such as resin into the barrel 1 is attached to the front part of the barrel 1, and the extrusion nozzle of the barrel valve is generally connected to a granulating device.
このように構成されていることにより、定屡フィーダで
バレルの内孔内へ樹脂を供給して加熱しながらスクリュ
軸を回転させると、溶融した樹脂は回転するスクリュ軸
によって混練されなからバレル内を先端部へ送られ、ノ
ズルから押出されて造粒装置で押出、切断されたのち、
冷却により固化してベレットとなる。With this structure, when the screw shaft is rotated while the resin is fed into the inner hole of the barrel with a constant feeder and heated, the molten resin is not kneaded by the rotating screw shaft and is mixed inside the barrel. is sent to the tip, extruded from the nozzle, extruded and cut by the granulation device, and then
Upon cooling, it solidifies and becomes a pellet.
このような2軸混練機による樹脂の混練においては、単
軸混練機のようにスクリュ軸の回転数と樹脂の吐出量と
が比例するという関係がなく、定量フィーダによる樹脂
の供給量と樹脂の吐出量とが等しいという関係にあるの
で、最適な物性を有する混練樹脂を得るためには、樹脂
の投入量や樹脂温度、スクリュ軸の回転数、スクリュの
構成、バレル内の樹脂充満度、樹脂圧力等を調整する必
要があり、これらの因子のうち、運転中に自由に選択調
整できるものが多いほど幅広い効果が期待できる。When kneading resin using such a two-screw kneader, unlike a single-screw kneader, the rotation speed of the screw shaft is not proportional to the amount of resin discharged, but the amount of resin supplied by the quantitative feeder is Therefore, in order to obtain a kneaded resin with optimal physical properties, the amount of resin input, resin temperature, rotation speed of the screw shaft, screw configuration, degree of resin filling in the barrel, resin It is necessary to adjust pressure, etc., and the more of these factors can be freely selected and adjusted during operation, the wider the effects can be expected.
そこで従来、スクリュ軸を中心軸とこの中心軸上に並列
して軸着された複数個のセグメントスクリュとで形成し
、セグメントスクリュとして、スクリュピッチの異なっ
たものや、特殊なパドルを有するものを用意して交換使
用することが行われている。この結果、バレル内樹脂の
送り速度が調整されたり、樹脂が送り戻しされたりする
ように往復したりして樹脂の充満度等が調整される。Therefore, conventionally, the screw shaft is formed by a central shaft and a plurality of segment screws mounted in parallel on this central shaft, and segment screws with different screw pitches or with special paddles are used as segment screws. They are prepared and exchanged for use. As a result, the feeding speed of the resin in the barrel is adjusted, and the resin is sent back and forth to adjust the filling degree of the resin.
しかしながら、このような従来の2軸混練機における充
満度調整では、充分な調整が期待できないばかりでなく
、調整のたびにセグメントスクリュを交換しなければな
らないので、面倒で長時間を要するという問題があった
。また、バレルの樹脂出口にスライディングゲートを設
けて開閉させ樹脂の排出量を調節することも提案されて
いるが、この場合、スクリュ軸に大きなスラスト力が作
用し、このためにスラストベアリングを設けようとして
も、2軸が近接しているのでその大きさが規制されると
いう問題があるし、またゲートの摺動部分に樹脂が侵入
してその開閉を妨げるという問題があった。However, adjusting the filling level in such conventional twin-screw kneading machines not only does not allow for sufficient adjustment, but also requires replacing the segment screws each time the adjustment is made, which is troublesome and takes a long time. there were. It has also been proposed to install a sliding gate at the resin outlet of the barrel and open and close it to adjust the amount of resin discharged, but in this case, a large thrust force will act on the screw shaft, so it is recommended to install a thrust bearing for this purpose. However, since the two shafts are close to each other, there is a problem in that their size is restricted, and there is also a problem in that resin enters the sliding part of the gate and prevents it from opening and closing.
このような課題を解決するために本発明では、スクリュ
軸の中間部で隣接するセグメントスクリュ間にこれより
も小径のバルブリングをスクリュ軸の中心軸に軸着して
介装し、このバルブリングとバルブの内孔との間の空間
部断面積を拡縮調節するように内孔横断方向に進退駆動
されるバレルパルプをバレル側のガイドブロックで支持
させて設けるとともに、このガイドブロックに外部の加
熱源と冷却源とに接続された加熱、冷却孔を穿設した。In order to solve such a problem, the present invention provides a valve ring with a smaller diameter than this, which is attached to the central axis of the screw shaft and interposed between adjacent segment screws at the middle part of the screw shaft. Barrel pulp is supported by a guide block on the barrel side and is provided with barrel pulp that is driven forward and backward in the direction across the inner hole so as to expand and contract the cross-sectional area of the space between the inner hole of the valve and the inner hole of the valve. Heating and cooling holes connected to a source and a cooling source were drilled.
定量フィーダで樹脂をバレル内へ供給し、スクリュ軸を
回転させると、樹脂は溶融、混練されてバレルの先端部
へ送られ、ノズルから押出される。When resin is fed into the barrel with a quantitative feeder and the screw shaft is rotated, the resin is melted, kneaded, sent to the tip of the barrel, and extruded from the nozzle.
バレルパルプを進退調節するとバルブリングとバレル内
孔との間の空間部の断面積が拡縮し、絞り量が変化する
ことにより樹脂の充満度が調整されて練りが強くなった
り弱くなったりする。バレルパルプを冷却すると、その
摺動部とガイドブロックとのすき間に侵入している樹脂
が固化しこのすき間からの樹脂の漏洩が防止される。ま
た、この状態から冷却を止めてバレルパルプを加熱する
と、すき間の樹脂が溶融し、バレルパルプの進退調節が
可能になる。When the barrel pulp is advanced or retreated, the cross-sectional area of the space between the valve ring and the barrel inner hole expands or contracts, and by changing the amount of squeezing, the degree of resin filling is adjusted, making the kneading stronger or weaker. When the barrel pulp is cooled, the resin that has entered the gap between the sliding part and the guide block solidifies, and leakage of the resin from this gap is prevented. Furthermore, when cooling is stopped from this state and the barrel pulp is heated, the resin in the gap melts, making it possible to adjust the advance and retreat of the barrel pulp.
第1図ないし第7図は本発明に係る2軸混練機の実施例
を示し、第1図はそのバレル中央部近傍の縦断面図、第
2図は第1図におけるパルプリング外周部近傍の拡大縦
断面図、第3図はバレルパルプとバルブリングとの一部
破断正面図、第4図は同じく平面図、第5図はガイドブ
ロックの正面図、第6図はバレルパルプの正面図、第7
図は同じく縦断面図である0図において、Iは外形を方
形状に形成されて両端部に横長長方形のフランジlaを
有する複数個のバレルであって、フランジla同士を接
合されて延設されており、その全長の前端部寄りには、
図示しない定量フィーダが装着される樹脂供給口1bが
開口されている。各バレルlは断面を眼鏡状に形成され
た内孔1cを備えており、二〇内孔1c内には、バレル
1のはゾ全長にわたる一対のスクリュ軸2が、互いに近
接。1 to 7 show an embodiment of the twin-screw kneading machine according to the present invention, FIG. 1 is a longitudinal cross-sectional view of the vicinity of the center of the barrel, and FIG. An enlarged vertical sectional view, FIG. 3 is a partially cutaway front view of the barrel pulp and valve ring, FIG. 4 is a plan view, FIG. 5 is a front view of the guide block, and FIG. 6 is a front view of the barrel pulp. 7th
In Figure 0, which is also a vertical cross-sectional view, I denotes a plurality of barrels having a rectangular outer shape and having horizontally long rectangular flanges la at both ends, and the flanges la are joined to each other and extended. Near the front end of its entire length,
A resin supply port 1b to which a quantitative feeder (not shown) is attached is open. Each barrel 1 is provided with an inner hole 1c having a spectacle-shaped cross section, and within the inner hole 1c, a pair of screw shafts 2 extending over the entire length of the barrel 1 are close to each other.
平行して回転自在に軸支されている。このスクリュ軸2
は、内孔1cの中心を貫通して回転自在に軸支された中
心軸2aと、図に符号2b、2c。They are rotatably supported in parallel. This screw shaft 2
A central shaft 2a that passes through the center of the inner hole 1c and is rotatably supported, and reference numerals 2b and 2c in the figure.
2dで示すように複数個に分割されて中心軸2a上に並
列軸着されたセグメントスクリュとで形成されており、
各セグメントスクリュ2b、2c。As shown by 2d, it is formed by segment screws that are divided into a plurality of pieces and are mounted in parallel on the central shaft 2a,
Each segment screw 2b, 2c.
2dはスクリューピッチ等の異なるものの中から選択さ
れて軸着されている。2列のスクリュ軸2は図示しない
モータにより変速装置を介して回転駆動されており、本
実施例では互いに同方向に回転している。バレルlの先
端部は、本実施例の場合、図示しない造粒装置に連結さ
れている。このように構成されていることにより、定量
フィーダで供給口1bからバレルl内へ樹脂が供給され
、スクリュ軸2が回転すると、樹脂が混練されてバレル
1内を先端部へ送られ、ノズルから造粒装置へ押出され
る。2d is selected from screws with different screw pitches, etc., and is pivotally mounted. The two rows of screw shafts 2 are rotationally driven by a motor (not shown) via a transmission, and in this embodiment, they rotate in the same direction. In this embodiment, the tip of the barrel l is connected to a granulating device (not shown). With this configuration, the resin is supplied from the supply port 1b into the barrel l by the quantitative feeder, and when the screw shaft 2 rotates, the resin is kneaded and sent inside the barrel 1 to the tip, and then from the nozzle. Extruded to granulation equipment.
スクリュ軸2の中間接合部に対応する箇所において互い
に隣接するバレルlの797218間には、全体を符号
3で示す充満度調整装置が介装されている。すなわち、
バレル1の中間部において隣接するセグメントスクリュ
2b、2c間には、これよりも小径の環状に形成された
バルブリング4が軸着されて介装されており、その外周
面とバレルlの内周1cとの間には環状の空間部5が形
成されている。6は全体をは鷲正方形の板状に形成され
て中央から上下に2分割されたバレルバルブであって、
これにはバレルlの内孔1cと相似形でこれよりも小径
の眼鏡状に形成された孔6aが設けられており、この孔
6aは、バルブリング4の外周面と接離自在に嵌合され
ている。バレルバルブ6と両側の各フランジlaとの間
には、フランジ1aと同形の板状に形成されて内孔1c
と同寸法の孔7aを有するガイドブロック7がそれぞれ
介装されていて、このガイドブロック7は短冊状に形成
された一対の案内板8とともにフランジ1aとボルトで
一体化されており、前記バレルバルブ6は、一対のガイ
ドブロック7と一対の案内板8とで形成された断面長方
形の孔9に内孔1c横断方向へ進退自在に嵌合されてい
る。孔9の上下両端開口は、短冊状に形成されてボルト
止めされたプレー)10で閉塞されていて、これら上下
のプレートlOには、内孔にねじが切られた筒状のナツ
ト11が軸受12を介して回動自在に支持されており、
各ナツトtiにはハンドル13が着脱自在に装着されて
いる。14はナツト11のねじ孔にねじ部を螺合された
ねじ軸であって、その一端のフランジ15を前記バレル
バルブ6にボルト止めされており、ハンドル13でナツ
ト11を回動させることによりねじ作用でねじ軸14が
進退し、バレルバルブ6が進退して、空間部5の断面積
が拡縮されるように構成されている。Between 797218 of barrels 1 adjacent to each other at locations corresponding to intermediate joints of screw shafts 2, a filling degree adjusting device, generally designated by reference numeral 3, is interposed. That is,
A valve ring 4 formed in an annular shape with a smaller diameter is mounted and interposed between adjacent segment screws 2b and 2c in the middle part of the barrel 1, and the outer circumferential surface of the valve ring 4 and the inner circumference of the barrel l are interposed. An annular space portion 5 is formed between the portion 1c and the portion 1c. Reference numeral 6 denotes a barrel valve which is formed into an eagle-square plate shape and is divided into upper and lower parts from the center.
This is provided with a hole 6a formed in the shape of a spectacle similar to the inner hole 1c of the barrel l and having a smaller diameter than the inner hole 1c. has been done. Between the barrel valve 6 and each flange la on both sides, an inner hole 1c is formed in a plate shape having the same shape as the flange 1a.
A guide block 7 having a hole 7a of the same size as that of the barrel valve is interposed in each case, and the guide block 7 is integrated with the flange 1a by bolts together with a pair of guide plates 8 formed in a rectangular shape. 6 is fitted into a hole 9 having a rectangular cross section formed by a pair of guide blocks 7 and a pair of guide plates 8 so as to be freely movable in a direction transverse to the inner hole 1c. The openings at both the upper and lower ends of the hole 9 are closed with plates 10 formed in the form of strips and secured with bolts, and in these upper and lower plates 10, a cylindrical nut 11 with a thread cut in the inner hole is installed to hold the bearing. It is rotatably supported via 12,
A handle 13 is detachably attached to each nut ti. Reference numeral 14 denotes a screw shaft whose threaded portion is screwed into the screw hole of the nut 11, and the flange 15 at one end thereof is bolted to the barrel valve 6. By rotating the nut 11 with the handle 13, the screw shaft can be screwed. The screw shaft 14 is moved forward and backward by the action, and the barrel valve 6 is moved forward and backward, so that the cross-sectional area of the space 5 is expanded or contracted.
さらに前記各ガイドブロック7には、加熱源と冷却源と
に接続された加熱、冷却用の孔7bが一端を栓16で閉
塞されて穿設されており、図示しないバルブを切替える
ことによりガイドブロック7が加熱されたり冷却された
りするように構成されている。Further, each guide block 7 is provided with a heating/cooling hole 7b connected to a heating source and a cooling source, the end of which is closed with a stopper 16. By switching a valve (not shown), the guide block 7 is configured to be heated or cooled.
以上のように構成された2軸混練機の動作を説明する。The operation of the two-screw kneader configured as above will be explained.
定量フィーダにより供給口1bからバレル1内へ樹脂を
供給し、モータを始動すると、変速装置を介してスクリ
ュ軸2が回転し、バレル1内の樹脂は溶融、混練されて
バレルlの先端部へ向って送られる。この樹脂はバレル
l先端のノズルから造粒装置の樹脂道路へ押出されて複
数個のノズルから溶融状態で押出され、周回するカッタ
で顆粒状に切断されたのち冷却されることにより固化し
て回収される。When resin is supplied into the barrel 1 from the supply port 1b by the quantitative feeder and the motor is started, the screw shaft 2 rotates via the transmission, and the resin in the barrel 1 is melted and kneaded and sent to the tip of the barrel l. sent towards. This resin is extruded from the nozzle at the tip of the barrel l to the resin road of the granulator, extruded in a molten state from multiple nozzles, cut into granules by a rotating cutter, and then solidified by cooling and recovered. be done.
バレルl内における樹脂の充満度等を調整する場合には
、ハンドル13をナツト11に装着して回動繰作すると
、そのねじ作用でねじ軸14が進退し、バレルバルブ6
が、両側のガイドブロック7と両側の案内板8とで囲ま
れた孔9に沿って進退する。この結果、バレルバルブ6
の孔6aによって環状空間部5の断面積が拡縮されるの
で、樹脂の充満度が調整される。充満度を上げると、ス
クリュ部分では樹脂の移動抵抗が減少して練りが弱くな
るとともに樹脂の温度が下がり、またパドル等の混練部
分では充満度を上げると練りが強くなる。When adjusting the degree of resin filling in the barrel l, the handle 13 is attached to the nut 11 and rotated repeatedly, and the threaded shaft 14 advances and retreats due to the screw action, and the barrel valve 6
moves forward and backward along a hole 9 surrounded by guide blocks 7 on both sides and guide plates 8 on both sides. As a result, barrel valve 6
Since the cross-sectional area of the annular space 5 is expanded or contracted by the holes 6a, the degree of filling of the resin is adjusted. When the degree of filling is increased, the resistance to the movement of the resin decreases in the screw portion, making the kneading weaker and the temperature of the resin lowers.In addition, when the degree of filling is increased in the kneading portion such as the paddle, the kneading becomes stronger.
調整後は摺動部であるバレルパルプ6とガイドブロック
7、案内板8とのすき間から樹脂が洩れるおそれがある
ので、ガイドブロック7の孔7bを冷却源側に切替える
と、ガイドブロック7およびその周辺部が冷却され、す
き間へ侵入した樹脂が固化してこのすき間からの樹脂の
漏洩を防止することができる。再び充満度調整を行う場
合には、孔7bを加熱源側へ切替えると、すき間内で固
化していた樹脂が溶融するので、バレルバルブ6の進退
が可能となり、調整動作を妨げることがない。After adjustment, there is a risk of resin leaking from the gaps between the sliding part of the barrel pulp 6, the guide block 7, and the guide plate 8. Therefore, if the hole 7b of the guide block 7 is switched to the cooling source side, the guide block 7 and its The surrounding area is cooled and the resin that has entered the gap solidifies, making it possible to prevent the resin from leaking through the gap. When adjusting the filling level again, when the hole 7b is switched to the heat source side, the resin solidified in the gap is melted, allowing the barrel valve 6 to move forward and backward without interfering with the adjustment operation.
なお、本実施例ではスクリュ軸2の中心軸2aを丸棒状
に形成した例を示したが、その外周にスプライン溝状の
溝を設ければ、セグメントスクリュ2b等の挿入が容易
である。Although the present embodiment shows an example in which the center shaft 2a of the screw shaft 2 is formed into a round bar shape, if a spline groove-like groove is provided on the outer periphery of the center shaft 2a, insertion of the segment screw 2b, etc. is facilitated.
以上の説明により明らかなように本発明によれば2軸混
練機において、スクリュ軸の中間部で隣接するセグメン
トスクリュ間にこれよりも小径のパルプリングをスクリ
ュ軸の中心軸に軸着して介装し、このバルブリングとパ
ルプの内孔との間の空間部断面積を拡縮調節するように
内孔横断方向に進退駆動されるバレルバルブをバレル側
のガイドブロックで支持させて設けるとともに、このガ
イドブロックに外部の加熱源と冷却源とに接続された加
熱、冷却孔を穿設したことにより、バレル内における樹
脂の充満度等の調整を、機械の運転中に混練度を見なが
らハンドルの回動繰作だけで行うか、あるいは遠隔繰作
で行うことも可能であり、作業性が大幅に向上するとと
もに、適切な調整が可能となり混練性能が向上する。ま
た調整のための摺動部周辺を冷却して樹脂を固化させる
ことができるので、樹脂の漏洩が防止できるとともに、
調整に際しては摺動部周辺を加熱して樹脂を溶融するこ
とができるので、調整動作を妨げることがない。As is clear from the above explanation, according to the present invention, in a two-screw kneading machine, a pulp ring with a smaller diameter than the segment screws is attached between adjacent segment screws in the middle part of the screw shaft. A barrel valve is supported by a guide block on the barrel side and is provided with a barrel valve that is driven forward and backward in a direction across the inner hole so as to adjust the cross-sectional area of the space between the valve ring and the inner hole of the pulp. By drilling heating and cooling holes connected to external heating and cooling sources in the guide block, adjustments such as the degree of filling of resin in the barrel can be made by turning the handle while checking the degree of kneading while the machine is running. It is possible to carry out the process only by rotary operation or by remote operation, which greatly improves work efficiency and enables appropriate adjustment, thereby improving kneading performance. In addition, since the area around the sliding part for adjustment can be cooled and the resin can be solidified, resin leakage can be prevented and
During adjustment, the area around the sliding part can be heated to melt the resin, so the adjustment operation is not hindered.
第1図ないし第7図は本発明に係る2軸混練機の実施例
を示し、第1はそのバレル中央部近傍の縦断面図、第2
図は第1図におけるパルプリング外周部近傍の拡大縦断
面図、第3図はバレルバルブとバルブリングとの一部破
断正面図、第4図は同じく平面図、第5図はガイドブロ
ックの正面図、第6図はバレルバルブの正面図、第7図
は同じく縦断面図である。
1・・・・バレル、IC・・・・内孔、2・・・・スク
リュ軸、2a・・・・中心軸、2b、2c、2d・・・
・セグメントスクリュ、3・・・・充満度調整装置、4
・・・・バレルリング、5・・・・空間部、6・・・・
バルブリング、7・・・・ガイドブロック、7b・・・
・加熱、冷却孔、11・・・・ナツト、14・・・・ね
じ軸。
第1図
特許出願人 宇部興産株式会社1 to 7 show an embodiment of the twin-screw kneading machine according to the present invention, the first is a longitudinal sectional view near the center of the barrel, and the second is a longitudinal cross-sectional view of the vicinity of the barrel center.
The figure is an enlarged vertical cross-sectional view of the vicinity of the outer circumference of the pulp ring in Figure 1, Figure 3 is a partially cutaway front view of the barrel valve and valve ring, Figure 4 is a plan view of the same, and Figure 5 is a front view of the guide block. FIG. 6 is a front view of the barrel valve, and FIG. 7 is a longitudinal cross-sectional view. 1...Barrel, IC...Inner hole, 2...Screw shaft, 2a...Center shaft, 2b, 2c, 2d...
・Segment screw, 3... Filling level adjustment device, 4
... Barrel ring, 5 ... Space part, 6 ...
Valve ring, 7...Guide block, 7b...
・Heating, cooling hole, 11...nut, 14...screw shaft. Figure 1 Patent applicant Ube Industries Co., Ltd.
Claims (1)
グメントスクリュとからなりバレルの内孔にセグメント
スクリュを嵌合させて回転する一対のスクリュ軸を備え
た2軸混練機において、前記スクリュ軸の中間部で隣接
するセグメントスクリュ間にこれよりも小径のバルブリ
ングを前記中心軸に軸着して介装し、このバルブリング
とバルブの内孔との間の空間部断面積を拡縮調節するよ
うに内孔横断方向に進退駆動されるバレルバルブをバレ
ル側のガイドブロックで支持させて設けるとともに、こ
のガイドブロックに外部の加熱源と冷却源とに接続され
た加熱、冷却孔を穿設したことを特徴とする2軸混練機
。In a two-screw kneading machine equipped with a pair of screw shafts, each consisting of a central shaft and a plurality of segment screws mounted in parallel on the central shaft, the segment screws are fitted into inner holes of a barrel to rotate, A valve ring with a smaller diameter than this is inserted between adjacent segment screws at the middle part of the screw shaft, and is attached to the central shaft, and the cross-sectional area of the space between the valve ring and the inner hole of the valve is reduced. A barrel valve that is driven forward and backward in a direction across the inner hole to adjust expansion and contraction is supported by a guide block on the barrel side, and this guide block has heating and cooling holes connected to external heating and cooling sources. A two-shaft kneading machine characterized by having a perforation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63253472A JPH0299305A (en) | 1988-10-07 | 1988-10-07 | Biaxial kneader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63253472A JPH0299305A (en) | 1988-10-07 | 1988-10-07 | Biaxial kneader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0299305A true JPH0299305A (en) | 1990-04-11 |
Family
ID=17251859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63253472A Pending JPH0299305A (en) | 1988-10-07 | 1988-10-07 | Biaxial kneader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0299305A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5603564A (en) * | 1992-12-31 | 1997-02-18 | Antogi Ag | Housing for twin worm-gear press with internal insert to reduce wear of housing |
US6238079B1 (en) | 1999-04-28 | 2001-05-29 | The Japan Steel Works, Ltd. | Kneading degree adjusting device for twin extruder |
US8079747B2 (en) * | 2005-07-12 | 2011-12-20 | Borealis Technology Oy | Counter-rotating twin screw extruder |
JP2016055575A (en) * | 2014-09-11 | 2016-04-21 | 日本ノズル株式会社 | On/off valve for molten resin, and opening/closing device and opening/closing method for molten resin flow channel |
EP2239122A4 (en) * | 2008-01-30 | 2017-10-11 | Kabushiki Kaisha Kobe Seiko Sho | Kneading degree adjusting apparatus, extruder, and continuous kneader |
US10532491B2 (en) * | 2016-09-30 | 2020-01-14 | Toyota Jidosha Kabushiki Kaisha | Twin-screw extrusion kneader with movable portions to control viscosity of electrode paste and manufacturing method for electrode paste therewith |
-
1988
- 1988-10-07 JP JP63253472A patent/JPH0299305A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5603564A (en) * | 1992-12-31 | 1997-02-18 | Antogi Ag | Housing for twin worm-gear press with internal insert to reduce wear of housing |
US6238079B1 (en) | 1999-04-28 | 2001-05-29 | The Japan Steel Works, Ltd. | Kneading degree adjusting device for twin extruder |
US8079747B2 (en) * | 2005-07-12 | 2011-12-20 | Borealis Technology Oy | Counter-rotating twin screw extruder |
EP2239122A4 (en) * | 2008-01-30 | 2017-10-11 | Kabushiki Kaisha Kobe Seiko Sho | Kneading degree adjusting apparatus, extruder, and continuous kneader |
JP2016055575A (en) * | 2014-09-11 | 2016-04-21 | 日本ノズル株式会社 | On/off valve for molten resin, and opening/closing device and opening/closing method for molten resin flow channel |
US10532491B2 (en) * | 2016-09-30 | 2020-01-14 | Toyota Jidosha Kabushiki Kaisha | Twin-screw extrusion kneader with movable portions to control viscosity of electrode paste and manufacturing method for electrode paste therewith |
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