JPH05228920A - Screw type kneader - Google Patents

Screw type kneader

Info

Publication number
JPH05228920A
JPH05228920A JP4069667A JP6966792A JPH05228920A JP H05228920 A JPH05228920 A JP H05228920A JP 4069667 A JP4069667 A JP 4069667A JP 6966792 A JP6966792 A JP 6966792A JP H05228920 A JPH05228920 A JP H05228920A
Authority
JP
Japan
Prior art keywords
screw
groove
resin material
thread
grooves
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
Application number
JP4069667A
Other languages
Japanese (ja)
Inventor
Masaya Murata
昌弥 村田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Polymer Co Ltd
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Polymer Co Ltd
Shin Etsu Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Etsu Polymer Co Ltd, Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Polymer Co Ltd
Priority to JP4069667A priority Critical patent/JPH05228920A/en
Publication of JPH05228920A publication Critical patent/JPH05228920A/en
Pending legal-status Critical Current

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
    • B29C48/397—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 a single screw
    • 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
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
    • 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
    • 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
    • B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities

Abstract

PURPOSE:To provide a screw type kneader, by which kneading properties at a high grade are acquired by quickly homogenizing a resin material and an additional matter for the resin material and which combines self-cleaning properties efficiently forwarding the homogenized resin material without leaving the resin material in a screw. CONSTITUTION:In the screw type kneader, an annular projection 7 vertical to the axis of a screw 2 is formed on its midway of a screw 2 while at least a part of a thread groove 6 on the discharge side of the screw 2 is formed in thread grooves 11 with irregular bottom face formed by mutually adjoining a large number of grooves 10 having small twist angle in the direction having larger twist angle than the grooves 10.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明はスクリュー式混練機、主
としてポリエチレン、ポリ塩化ビニル、ＡＢＳ、ポリア
ミドなどの合成樹脂あるいはこれらの樹脂に有機質また
は無機質繊維、他の合成樹脂、反応性物質、各種添加剤
等を添加したものからなる合成樹脂材料（以下、熟語を
除き単に樹脂材料とする）を、加圧下に加熱混練し、金
型やノズルを通して、射出、押出、ブローなどの各種の
成形法で成形したり、混練物を造粒またはペレット化す
るのに有用なスクリュー式混練機に関する。FIELD OF THE INVENTION The present invention relates to a screw type kneader, mainly synthetic resins such as polyethylene, polyvinyl chloride, ABS and polyamide, or organic or inorganic fibers, other synthetic resins, reactive substances and various additives to these resins. A synthetic resin material (hereinafter simply referred to as a resin material, excluding idioms) made by adding agents etc. is heated and kneaded under pressure, and is passed through various molds such as injection, extrusion, and blow through a mold or nozzle. The present invention relates to a screw-type kneader useful for molding, granulating or pelletizing a kneaded product.

【０００２】[0002]

【従来の技術】一般に、この種の混練機では途中でねじ
り角、溝深さ、条数などが変わるねじ山を備えたスクリ
ューが円筒状のシリンダー内に回転自在に設けられてい
て、機内に受け入れられた樹脂材料はシリンダー内を移
動する間に加熱され、スクリューの溝が浅い帯域を通過
するときに加圧圧縮を受けて溶融された後、シリンダー
半ばの開口部を備えたスクリューの溝が深い帯域を通過
するときに圧抜きやガラス繊維等の添加が行われ、さら
にシリンダー内をスクリューの先端方向へ送られていく
間に均一化されて、先端部より金型やノズルを介して系
外に排出されるという方法がとられている。2. Description of the Related Art Generally, in this kind of kneading machine, a screw having a screw thread whose twist angle, groove depth, number of threads, etc. changes in the middle is rotatably provided in a cylindrical cylinder. The resin material received is heated as it moves through the cylinder and is pressed and melted as the screw groove passes through the shallow zone, after which the screw groove with the mid-cylinder opening is opened. Depressurization and addition of glass fiber etc. are performed when passing through the deep zone, and it is homogenized while being sent in the direction of the tip of the screw in the cylinder, and the system is introduced from the tip through the mold and nozzle. The method is to be discharged outside.

【０００３】しかし、スクリューとシリンダー間の相対
速度による剪断効果に基づく混練作用は、非能率・不均
一な上、溶融した樹脂材料がスクリューのねじ山の背面
に付着してスクリュー内の樹脂材料を完全に押出すこと
ができず（自掃性に乏しい）、このため色替え、樹脂替
えが能率よく行われないという問題があった。前者の欠
点の除去、すなわち均一性の向上のためにスクリューの
先端に取り付ける各種の均質装置が提案され一部は実用
化されたが、樹脂材料の流れの抵抗となるため、スクリ
ュー内での残留樹脂量を増大させ、後者の欠点である自
掃性を、さらに低下させていた。However, the kneading action based on the shearing effect due to the relative speed between the screw and the cylinder is inefficient and non-uniform, and the molten resin material adheres to the back surface of the screw thread of the screw to remove the resin material in the screw. There was a problem in that it could not be completely extruded (poor self-cleaning property), so that color change and resin change were not performed efficiently. Various homogenizing devices attached to the tip of the screw to eliminate the former defect, that is, improve homogeneity, have been proposed and some have been put into practical use. The amount of resin was increased, and the self-cleaning property, which is the drawback of the latter, was further reduced.

【０００４】[0004]

【発明が解決しようとする課題】一般に、スクリューの
ねじ山のねじり角が小さくリードの小さいスクリュー
は、送り効率が高く自掃性は大きいが、溝の幅が狭くな
って押出し能力が低下するほか混練効果も小さくなる。
これに対し、ねじり角が大きいリードの大きいスクリュ
ーは、溝幅が大きく押出し量は増すが、ねじり角が大き
過ぎるとねじ山の背面に滞留を生じて著しく自掃性を損
ない押出し効率を低下させるので、結果的には押出し量
の増加もそれ程期待できない。またリードの大きいスク
リューは、混練効果は増すが、滞留のため著しい混練む
らを生ずる。Generally, a screw having a small screw thread angle and a small lead has a high feed efficiency and a large self-cleaning property, but the width of the groove becomes narrow and the extrusion capability is deteriorated. The kneading effect is also small.
On the other hand, a screw with a large lead having a large twist angle has a large groove width and an increased extrusion amount, but if the twist angle is too large, retention occurs on the back surface of the screw thread, significantly impairing self-cleaning property and lowering extrusion efficiency. Therefore, as a result, the increase in the extrusion amount cannot be expected so much. Further, a screw having a large lead increases the kneading effect, but causes considerable uneven kneading due to retention.

【０００５】押出し効率を高めて押出し量を増加させ、
自掃性を高めて無駄な材料消費を省き、原価低減と省資
源を図ると共に均質で良好な混練機能を備えた混練機の
開発は、産業上解決しなければならない重要な課題であ
る。To increase the extrusion efficiency to increase the extrusion amount,
The development of a kneading machine that enhances the self-cleaning property, reduces wasteful material consumption, reduces costs and saves resources, and has a uniform and good kneading function is an important issue to be solved industrially.

【０００６】本発明の目的は樹脂材料およびその添加物
を速やかに均質化して高度な混練性を得ると共に、この
均質化された樹脂材料をスクリューに残留させることな
く効率よく送り出す自掃性を兼ね備えたスクリュー式混
練機を提供するにある。An object of the present invention is to rapidly homogenize a resin material and its additives to obtain a high degree of kneading property, and also to have a self-cleaning property for efficiently feeding the homogenized resin material without leaving the screw on the screw. It is to provide a screw type kneader.

【０００７】[0007]

【課題を解決するための手段】本発明者は先に、スクリ
ューの一部に材料移動方向に減少する幅および／または
深さの溝を持った圧縮部を形成すると共に、これに相対
するシリンダーの内周面に、スクリューのねじ山をまた
ぐ程度の長さの凹溝を、軸方向に複数個間隔をおいて設
けることにより、スクリューで加圧され圧縮部に押し込
まれた樹脂材料を、凹溝を通じて前方へ押出して均質な
加熱と混練を行うようにした押出機（特開平3-281215号
公報）と、スクリューの一部に多数の溝状凹陥部が互い
に隣接して形成される凹凸底面を有する螺旋状の溝を設
けると共に、相対するシリンダーの内周面に、この相隣
れる溝間をまたぐ長さの凹溝を複数個、軸方向に設ける
ことにより、両者の相互作用で均質混練を図ると共に自
掃性を付与した押出機（特願平2-167334号）とを提案し
た。The present inventor has previously formed a compression portion having a groove having a width and / or depth that decreases in the material movement direction in a part of a screw and a cylinder facing the compression portion. On the inner peripheral surface of the, by providing a plurality of recessed grooves with a length that spans the screw thread of the screw at intervals in the axial direction, the resin material pressed by the screw and pushed into the compression part An extruder (Japanese Unexamined Patent Publication No. 3-281215) configured to extrude forward through a groove to perform uniform heating and kneading, and an uneven bottom surface in which a large number of groove-shaped recesses are formed adjacent to each other in a part of a screw By providing a spiral groove having a groove with a plurality of concave grooves extending in the axial direction on the inner peripheral surface of the opposing cylinder, the homogenous kneading is achieved by the interaction between the two. And extrusion with self-cleaning properties It was proposed and (Japanese Patent Application No. Hei 2-167334).

【０００８】本発明者は、とりわけ前者の押出機では均
質な加熱と捏和性が得られ、後者の押出機では優れた自
掃性と高度な混練性が得られることに着目して、さらに
研究を進めた結果、本発明に到達した。すなわち、本発
明による混練機は、スクリューの中程に、スクリューの
軸線に垂直な環状突起を設けると共に、その排出側のね
じ溝の少なくとも一部を、多数の小さいねじり角の溝が
これより大きなねじり角の方向に互いに隣接して形成さ
れる凹凸底面を有するねじ溝としたことを特徴とするも
のである。The present inventor has paid attention to the fact that the former extruder can obtain uniform heating and kneadability, and the latter extruder can obtain excellent self-cleaning property and high kneading property. As a result of conducting research, the present invention has been reached. That is, in the kneading machine according to the present invention, in the middle of the screw, an annular protrusion perpendicular to the axis of the screw is provided, and at least a part of the screw groove on the discharge side is provided with a large number of small twist angle grooves. It is characterized in that it is a thread groove having concavo-convex bottom surfaces formed adjacent to each other in the direction of the twist angle.

【０００９】この混練機は、上記の構成に加えてさら
に、環状突起および／またはその排出側のスクリュー部
分に相対するシリンダーの内周面に、少なくとも環状突
起および／またはスクリューのねじ山をまたぐ長さの凹
溝が、複数個軸方向に向けて配設されていることを好適
とするものである。In addition to the above structure, this kneading machine further has a length that crosses at least the annular projection and / or the screw thread of the screw on the inner peripheral surface of the cylinder facing the annular projection and / or the screw portion on the discharge side thereof. It is preferable that a plurality of concave grooves are provided in the axial direction.

【００１０】[0010]

【作用】本発明の混練機では、供給された樹脂材料がス
クリューの回転と共に加熱されながら加圧され、スクリ
ューの中程に設けられた軸線に垂直な環状突起の直前ま
で押し込まれて圧縮される。環状突起とシリンダーの内
周面との間には間隙が設けられているか、この間隙を欠
く代わりにシリンダーの内周面にスクリューのねじ山を
またぐ程度の長さの凹溝が設けられているか、あるいは
間隙と凹溝の両者を備えた構成となっているため、樹脂
材料はこの間隙または凹溝で分断され、剪断作用を受け
て均一に加熱され、軟化または溶融される。In the kneading machine of the present invention, the supplied resin material is pressurized while being heated as the screw rotates, and is pressed and compressed just before the annular projection perpendicular to the axis provided in the middle of the screw and compressed. .. Is there a gap between the annular protrusion and the inner peripheral surface of the cylinder, or is there a groove on the inner peripheral surface of the cylinder that spans the thread of the screw instead of lacking this gap? Alternatively, since the resin material has both the gap and the concave groove, the resin material is divided by the gap or the concave groove, uniformly heated by being subjected to the shearing action, and softened or melted.

【００１１】上記樹脂材料は環状突起を越えた後、再び
スクリューの作用を受けて前進する。排出側のスクリュ
ーの少なくとも一部、とくには先端部のねじ溝は、多数
の小さいねじり角の溝がこれより大きなねじり角の方向
に互いに隣接して形成される凹凸底面を有するねじ溝と
なっているので、必要に応じて相対するシリンダーの内
周面に設けられる、少なくともスクリューのねじ山をま
たぐ長さの凹溝との相互作用も加わって、上記の均質混
練性と自掃性の相反する２つの特性が同時に発現され、
樹脂材料は均質・迅速に混練されながら系外に排出され
る。After passing through the annular projection, the resin material is again acted upon by the action of the screw and advances. At least a part of the screw on the discharge side, in particular, the thread groove at the tip end is a thread groove having an uneven bottom surface in which a large number of grooves having a small twist angle are formed adjacent to each other in the direction of a larger twist angle. Therefore, the above-mentioned homogenous kneading property and self-cleaning property are contradictory to each other, in addition to the interaction with the groove provided at the inner peripheral surface of the opposing cylinder, which has a length at least straddling the screw thread of the screw. Two characteristics are expressed simultaneously,
The resin material is discharged to the outside of the system while being homogeneously and quickly kneaded.

【００１２】[0012]

【実施例】つぎに、本発明の具体的態様を図示したスク
リュー式単軸混練機を例として説明する。図１および図
２はそれぞれ異なる実施例に係るもので、これらの図に
おいて１は円筒状をしたシリンダー、２はこれを貫通し
て回転自在に設けられたスクリュー、３はスクリュー２
の根元に設けられた樹脂材料の供給口、４はその先端に
設けられた排出口である。EXAMPLES Next, a concrete embodiment of the present invention will be described by taking the illustrated screw type single-screw kneader as an example. 1 and 2 relate to different embodiments. In these drawings, 1 is a cylinder having a cylindrical shape, 2 is a screw rotatably provided through the cylinder, and 3 is a screw 2.
The resin material supply port 4 provided at the base of the is a discharge port provided at the tip thereof.

【００１３】スクリュー２は図示のように、ねじ山５の
ねじり角や軸のテーパーなどを変えて異なる圧縮比を与
える２つの帯域２ａ、２ｂからなっている。これらの帯
域におけるねじ山５およびねじ溝６には従来周知の形状
のものが採用されるが、加圧効果を向上するため、帯域
２ａでは２〜４程度、帯域２ｂでは 1.2〜２位の圧縮比
を設けるのが好ましい。As shown in the drawing, the screw 2 is composed of two zones 2a and 2b which give different compression ratios by changing the twist angle of the thread 5 and the taper of the shaft. Conventionally known shapes are adopted for the threads 5 and the thread grooves 6 in these zones, but in order to improve the pressurizing effect, compression of about 2 to 4 in the zone 2a and 1.2 to 2 in the zone 2b. It is preferable to provide a ratio.

【００１４】このスクリュー２はまた送り込まれる樹脂
材料の容積の変化に応じてスクリュー２の直径やねじ溝
の構造を変えてもよい。しかし、全長にわたってねじ山
５、ねじ溝６が形成されているフルフライトとするのが
よく、これにより有効長が全部活用されるほか、共廻り
による押出し量の減少を防止することができる。The screw 2 may also change the diameter of the screw 2 or the structure of the thread groove according to the change in the volume of the resin material fed. However, it is preferable to use full flight in which the screw thread 5 and the screw groove 6 are formed over the entire length, whereby the effective length can be fully utilized and the reduction of the extrusion amount due to co-rotation can be prevented.

【００１５】帯域２ａ、２ｂの境界部であるスクリュー
２の中程には、その軸線に垂直の環状突起７が設けられ
ていて、供給口３からシリンダー１内に供給されスクリ
ュー２の回転によって帯域２ａを加熱されながら移送さ
れる樹脂材料に抵抗を与えて圧縮し、樹脂材料が溶融可
塑化するのを促進する。In the middle of the screw 2 which is the boundary between the zones 2a and 2b, there is provided an annular projection 7 which is perpendicular to the axis of the zone, and is supplied from the supply port 3 into the cylinder 1 and is rotated by the screw 2. 2a gives resistance to the resin material transferred while being heated and compresses it, and promotes melting and plasticization of the resin material.

【００１６】この境界部では、図１に示すように環状突
起７がねじ山５‥‥の高さよりも低く、これに相対する
シリンダーの内周面１ａとの間に間隙８を形成している
か、図２に示すように環状突起７がねじ山５‥‥とほぼ
同じ高さをしていて、シリンダーの内周面１ａに少なく
とも環状突起７および／またはスクリューのねじ山５を
またぐ長さの長円形の凹溝９を複数個、スクリュー２の
軸線と平行に設けているか、あるいはこの両方を備えた
構成となっていて、溶融または半溶融した樹脂材料のみ
を間隙８および／または凹溝９を通して帯域２ｂ側へ導
くようにしている。At this boundary portion, as shown in FIG. 1, the annular projection 7 is lower than the height of the threads 5 ..., and forms a gap 8 between the annular projection 7 and the inner peripheral surface 1a of the cylinder. As shown in FIG. 2, the annular projection 7 has substantially the same height as the threads 5 ..., and the inner circumferential surface 1a of the cylinder has at least a length that extends over the annular projection 7 and / or the thread 5 of the screw. A plurality of oval concave grooves 9 are provided in parallel with the axis of the screw 2, or both of them are provided, and only the molten or semi-molten resin material is provided in the gap 8 and / or the concave groove 9. Through to the band 2b side.

【００１７】環状突起７がシリンダーの内周面１ａとの
間に間隙８を形成しているときは、この間隙８において
未溶融の樹脂材料を分断し、剪断作用を与えて溶融軟化
させて、帯域２ｂに送り出す作用を行う。このため、間
隙８の大きさは環状突起７の高さをねじ山５とほぼ同じ
高さにした場合と比べて２〜５倍の緩めに設定するのが
好ましい。When the annular projection 7 forms a gap 8 with the inner peripheral surface 1a of the cylinder, the unmelted resin material is divided in this gap 8 and a shearing action is applied to melt and soften the resin material. It acts to send it to the band 2b. For this reason, it is preferable that the size of the gap 8 is set to be 2 to 5 times looser than in the case where the height of the annular projection 7 is set to be substantially the same as the height of the thread 5.

【００１８】他方、凹溝９としては、図３（ａ）に示す
ようにシリンダーの内周面１ａの円周方向に多数の凹溝
を互いに間隔をおいて（あるいは互いに隣接して）軸方
向に１（または数列）スクリューの軸線と平行に配置し
たもの、図３（ｂ）に示すように軸線と平行の多数の凹
溝を互いに隣接して（あるいは間隔をおいて）、より好
ましくはスクリューのねじ５と逆方向の、螺旋状を呈す
る１または数条の溝として配置したもの、あるいは図３
（ｃ）に示すように多数の凹溝をスクリューの軸線と平
行に千鳥状に分散して配置したものなどが例示される。On the other hand, as the concave grooves 9, as shown in FIG. 3 (a), a large number of concave grooves are arranged in the circumferential direction of the inner peripheral surface 1a of the cylinder at intervals (or adjacent to each other) in the axial direction. 1 (or several rows) arranged in parallel with the axis of the screw, and as shown in FIG. 3 (b), a large number of grooves parallel to the axis are adjacent (or at intervals) to each other, more preferably the screw. Arranged as one or several grooves having a spiral shape in the direction opposite to the screw 5 of FIG.
For example, as shown in (c), a large number of concave grooves are arranged in a staggered pattern in parallel with the axis of the screw.

【００１９】しかし、この環状突起７に相対するシリン
ダーの内周面１ａに設けられる凹溝としては上記図３
（ａ）に示すものが最適であり、これによりスクリュー
の回転に伴うねじ山の位置に関係なく均一で連続した樹
脂材料の送り出しが行われる。However, the concave groove provided in the inner peripheral surface 1a of the cylinder facing the annular projection 7 is as shown in FIG.
The one shown in (a) is the most suitable, which allows the resin material to be fed out uniformly and continuously regardless of the position of the screw thread accompanying the rotation of the screw.

【００２０】これらの凹溝９の深さは溶融または半溶融
した樹脂は通れるが、未溶融樹脂は通過する間に剪断作
用を受けて溶融する程度が適当であり、例えば２mm以
下、とくには 0.3〜 0.7mm程度とするのが好ましい。ま
た、その断面形状は深さに対し幅広く丸みを帯びた半月
状に形成し、軸方向に漸次深くまた浅くなる流線形状と
するのが、自掃性を与える上で適当である。The depth of these concave grooves 9 is such that molten or semi-molten resin can pass through, but unmelted resin is subjected to a shearing action and melts during passage, for example, 2 mm or less, particularly 0.3. It is preferably about 0.7 mm. In addition, it is suitable to provide a self-cleaning property by forming the cross-sectional shape into a half-moon shape that is broadly rounded with respect to the depth and gradually becomes deeper and shallower in the axial direction.

【００２１】なお、環状突起７によりシリンダー１内を
閉塞すると共に凹溝９の深さを適当に浅くしたときは、
未溶融または軟化した樹脂材料は十分に加温されて溶融
または軟化した状態になるまで環状突起７の手前に取り
残されるので、完全に溶融した樹脂のみが凹溝９に送り
込まれることになり、結果として本混練機では異種樹脂
の均一混合・捏和・溶融をも可能にする。When the inside of the cylinder 1 is closed by the annular projection 7 and the depth of the concave groove 9 is appropriately reduced,
Since the unmelted or softened resin material is left in front of the annular projection 7 until it is sufficiently heated and melted or softened, only the completely melted resin is fed into the groove 9. As a result, this kneader enables uniform mixing, kneading and melting of different resins.

【００２２】これは溶融温度の異なる樹脂の微細化混練
（アロイ化）に高性能を発揮するもので、例えば６６ナ
イロン（融点： 265℃）、ポリエチレン（融点： 135
℃）のアロイ、あるいはウレタン（融点： 180℃）、軟
質塩化ビニル（融点： 105℃）のアロイなどが極めて容
易に混練される。This has a high performance in fine kneading (alloying) of resins having different melting temperatures, for example, 66 nylon (melting point: 265 ° C.), polyethylene (melting point: 135
(° C) alloy, urethane (melting point: 180 ° C), soft vinyl chloride (melting point: 105 ° C) alloy, etc. are kneaded very easily.

【００２３】環状突起７より排出側の帯域２ｂに相対す
るシリンダー１の内周面には、図１に示されるように、
必要に応じて前述したのと同様の長さ、配置、深さ、形
状を持つ凹溝９、好ましくは上記図３（ｂ）または
（ｃ）、とくには３（ｂ）に示されるものを数条にわた
って設けることができ、これにより移送効率の向上に寄
与する。On the inner peripheral surface of the cylinder 1 facing the zone 2b on the discharge side of the annular projection 7, as shown in FIG.
If necessary, the number of concave grooves 9 having the same length, arrangement, depth, and shape as those described above, preferably those shown in FIG. 3 (b) or (c), particularly 3 (b), can be used. It can be provided over the strips, which contributes to the improvement of transfer efficiency.

【００２４】上記図３の（ｂ）および（ｃ）に示す凹溝
９では、スクリュー２の回転につれてねじ山５の位置が
変わるので、凹溝９がスクリューのねじ山５をまたいだ
ときにのみ樹脂材料が凹溝９を通るというように、間欠
的な樹脂材料の流れを生じ、シリンダー１内では樹脂材
料の複雑な分流、合流が繰り返されることとなって、未
溶融樹脂は剪断作用を受けて溶融し、均一化された混練
が行われる。In the groove 9 shown in FIGS. 3B and 3C, the position of the screw thread 5 changes as the screw 2 rotates, so that only when the groove 9 crosses the screw thread 5 of the screw. As the resin material passes through the concave groove 9, an intermittent flow of the resin material is generated, and the complicated branching and joining of the resin material is repeated in the cylinder 1, so that the unmelted resin is subjected to the shearing action. And melted, and homogenized kneading is performed.

【００２５】さらに、排出側のスクリュー２の少なくと
も一部、好ましくは帯域２ｂの排出側に位置するスクリ
ュー２の先端部では、ねじ溝が図１、図２および図４に
示されるように、多数の小さいねじり角βの溝10、10‥
がこれより大きなねじり角γの方向に互いに隣接して形
成される凹凸底面を有する溝11となっている、帯域２ｃ
を構成している。Furthermore, at least a part of the screw 2 on the discharge side, preferably at the tip of the screw 2 located on the discharge side of the zone 2b, a large number of thread grooves are formed as shown in FIGS. 1, 2 and 4. Small twist angle β grooves 10, 10
Is a groove 11 having concave and convex bottom surfaces formed adjacent to each other in the direction of a larger twist angle γ, the zone 2c
Are configured.

【００２６】溝10‥のねじり角βは自掃性がよく、かつ
押し込み効果の大きい範囲として10〜35°を適当とし、
ねじ溝11のねじり角γは混練作用、ベント口14からの添
加物の巻き込み効果などから、これより大きい20〜45°
の範囲（ねじり角βより10〜20°大きい角度）を適当と
する。The twist angle β of the groove 10 has a good self-cleaning property, and 10 to 35 ° is suitable as a range in which the pushing effect is large,
The twist angle γ of the thread groove 11 is larger than 20 to 45 ° due to the kneading action and the effect of inclusion of the additive from the vent port 14.
The range (10 to 20 degrees larger than the twist angle β) is appropriate.

【００２７】また、溝10、10‥の底面の形状は図５に模
式的に示されるように、平面状のもの：10ａ、凹面状の
もの：10ｂ、あるいはスクリューの外周面と平行するも
の：10ｃなどとすることができるが、これらの最大の深
さはスクリュー２の他の帯域２ａ、２ｂにおけるねじ溝
６とほぼ同程度の１〜 1.5倍とし、各溝10、10間の境界
部12の深さを最大の深さの概ね 1/2以下、 1/5以上とす
るのが適当である。The shape of the bottom surface of each of the grooves 10, 10 ... Is flat: 10a, concave: 10b, or parallel to the outer peripheral surface of the screw, as schematically shown in FIG. 10c or the like, but the maximum depth of these is 1 to 1.5 times that of the thread groove 6 in the other zones 2a and 2b of the screw 2 and the boundary portion 12 between the grooves 10 and 10. It is appropriate to set the depth of the depth to about 1/2 or less and 1/5 or more of the maximum depth.

【００２８】ねじ溝11の幅はスクリュー２の他の帯域２
ａ、２ｂにおけるねじ溝６の幅と比べて１／２程度、ね
じ条数を２以上の複数とするのがよく、ねじ溝11間のね
じ山13は他の部分のねじ山５と同様の高さと幅を持つも
のとするのが適当である。The width of the thread groove 11 is the other zone 2 of the screw 2.
It is preferable that the width of the thread groove 6 in a and 2b is about 1/2, and the number of thread threads is two or more, and the thread 13 between the thread grooves 11 is the same as the thread 5 of other portions. It is appropriate to have height and width.

【００２９】このような構造になっているねじ溝11で
は、例えば溝 101に送り込まれた樹脂材料は、そのねじ
り角βが小さいので充分前進力が与えられて溝 101と 1
02の境界部12まで送られる。この部分の溝底は浅くなっ
ている上、次の溝 102とは大きなねじり角γで接してい
るため、送られてきた樹脂材料は、そこを通る間に剪断
作用を受けて溝 102へ送られるという動作を繰り返しな
がら帯域２ｃを通過して均質な混練が行われる。In the thread groove 11 having such a structure, for example, since the resin material fed into the groove 101 has a small twist angle β, a sufficient forward force is given to the resin material so that the grooves 101 and 1
It is sent to the boundary 12 of 02. Since the groove bottom of this portion is shallow and it is in contact with the next groove 102 at a large twist angle γ, the resin material sent in receives a shearing action while passing through it and is sent to the groove 102. The uniform kneading is performed by passing through the zone 2c while repeating the above-mentioned operation.

【００３０】帯域２ｃのスクリューは溝10のねじり角β
が小さいので、それ自体でも十分自掃性があり押出し能
力もあるが、この帯域に相対するシリンダーの内周面１
ａに、少なくともねじ山13をまたぐ長さの前述したのと
同様の配置、深さ、形状をした、好ましくは上記図３
（ｂ）または（ｃ）に示す配置の、凹溝９を設けること
もできる。The screw in the zone 2c has a twist angle β of the groove 10.
Since it is small, it has sufficient self-cleaning property and extrusion capacity by itself, but the inner peripheral surface 1 of the cylinder facing this zone
a has the same arrangement, depth, and shape as described above of at least the length crossing the thread 13, and preferably in FIG.
It is also possible to provide the concave groove 9 having the arrangement shown in (b) or (c).

【００３１】この場合には、溝 101と 102の境界部12ま
で送られてきた樹脂材料は、シリンダーの内周面１ａの
凹溝９に一旦移って前進した後、溝 102において元に戻
るという動作を繰り返す。このねじ溝11とシリンダー１
の凹溝９との間の移動の際に、樹脂材料の内外層が入れ
替わり、また樹脂材料に転がり回転作用を付与させて混
練が進む。同時に、樹脂材料がスクリュー２と共廻りす
るのを防ぎ、送り出し性能を高めるため、自掃性も改善
される。同様にして、シリンダー１のベント口14から投
入された添加物も転がり回転作用により急速に樹脂に包
み込まれ分散混練される。In this case, the resin material sent to the boundary portion 12 between the grooves 101 and 102 is once moved to the concave groove 9 of the inner peripheral surface 1a of the cylinder and advanced, and then returned to the original state in the groove 102. Repeat the operation. This thread groove 11 and cylinder 1
The inner and outer layers of the resin material are replaced with each other during the movement between the groove 9 and the concave groove 9, and the resin material is given a rolling effect so that the kneading proceeds. At the same time, the resin material is prevented from rotating together with the screw 2 and the delivery performance is enhanced, so that the self-cleaning property is also improved. In the same manner, the additives introduced from the vent port 14 of the cylinder 1 are rapidly wrapped in the resin by the rolling and rotating action and dispersed and kneaded.

【００３２】とくに、この凹溝９を図３（ｂ）または
（ｃ）に示す配置のものとしたときは、凹溝９の長さが
少なくとも相対するねじ山13をまたぐ長さなので、ねじ
溝11の押し込み作用でシリンダー１の凹溝９に押し込ま
れた樹脂は、同一ねじ溝 111内の溝 101より 102へ移る
だけでなく、相隣れるねじ溝 112内の溝 103へも移送さ
れ一層の分断分散が促進される。In particular, when the concave groove 9 is arranged as shown in FIG. 3B or 3C, the length of the concave groove 9 is at least such a length that it crosses the screw threads 13 facing each other. The resin pushed into the concave groove 9 of the cylinder 1 by the pushing action of 11 not only moves from the groove 101 in the same thread groove 111 to the groove 102, but also moves to the groove 103 in the adjacent thread groove 112. The fragmented dispersion is promoted.

【００３３】したがって、このような構成からなる帯域
２ｃをスクリューの先端に設けると、樹脂材料が完全に
均質化するため、均質化のためのブレーカプレートを必
要としなくなるという利点ももたらされる。Therefore, when the zone 2c having such a structure is provided at the tip of the screw, the resin material is completely homogenized, and there is an advantage that a breaker plate for homogenization is not required.

【００３４】なお、前記帯域２ｂおよび２ｃに相対する
シリンダー１には、図２に示されるように１または２以
上のベント口14、14を設けてもよく、これらにより加熱
蒸発する水分やその他の揮発分を蒸散排除したり、原料
樹脂への必要な添加剤をここより機内に供給することが
できる。さらに、これらのベント口14には着脱自在の蓋
15を設けてもよい。The cylinder 1 facing the zones 2b and 2c may be provided with one or more vent ports 14, 14 as shown in FIG. Volatile components can be removed by evaporation, and necessary additives to the raw material resin can be supplied from here. In addition, these vents 14 have removable lids.
15 may be provided.

【００３５】かくして、得られた樹脂は最後にシリンダ
ーの先端に設けられた金具、例えば図２に示すストラン
ドダイス16を通してひも状に押出し、冷却後分断して粒
状のペレットにするほか、周知の金型やノズルを通し
て、射出、押出、ブローなどの成形法によりで各種成形
品とすることができる。The resin thus obtained is finally extruded in the form of a string through a metal fitting provided at the tip of the cylinder, for example, a strand die 16 shown in FIG. 2. After cooling, it is divided into granular pellets, and well-known gold is used. Various molded articles can be formed by a molding method such as injection, extrusion, or blow through a mold or a nozzle.

【００３６】以上、一般の合成樹脂材料での適用につい
て説明したが、本発明はポリエチレン、ポリプロピレ
ン、ポリ塩化ビニル、ナイロン、ポリアセタール樹脂な
どの合成樹脂材料を、必要に応じてこれにガラス繊維、
炭素繊維、ウィスカーなどの有機または無機質繊維材料
を添加して加熱溶融したり、一方の樹脂を溶融した上で
他の樹脂を添加、急速均一に混練したり、あるいは紐状
に押出し切断してペレット化したり、常温で高粘度の各
種の生ゴムあるいはポリエステル、エポキシ樹脂などの
熱硬化性樹脂に前記有機または無機質の補強剤を添加し
て加熱溶融したり、加熱溶融された樹脂に、これと反応
する物質や相溶する樹脂を添加して急速に混練均質化し
たり、あるいは反応させて変性樹脂を得たり、また硬化
剤を添加して急速均質に混練し紐状に押出し乾燥切断し
てプリプレグとしたり、さらにはでんぷんや岩石、粘
度、セラミックなどの有機または無機質粉体に、水や油
のような液状物質を加えて可塑化したり、これらの高粘
度ないしはスラリー状物質としたりするための、スクリ
ュー式混練機として広く用いられる。Although the application of general synthetic resin materials has been described above, the present invention uses synthetic resin materials such as polyethylene, polypropylene, polyvinyl chloride, nylon, and polyacetal resin, if necessary, glass fiber,
Add organic or inorganic fiber material such as carbon fiber or whisker and heat and melt it, melt one resin and add other resin, knead rapidly and uniformly, or extrude and cut into a string shape to pellet Of various raw rubbers with high viscosity at room temperature or thermosetting resins such as polyester, epoxy resin, etc., which are added with the organic or inorganic reinforcing agent and melted by heating, or react with heat-melted resin. Add a substance or compatible resin to rapidly knead and homogenize, or react to obtain a modified resin, or add a curing agent to rapidly and homogeneously knead, extrude into a string shape, dry cut, and make a prepreg. In addition, liquid substances such as water and oil are added to organic or inorganic powders such as starch, rocks, viscosity, ceramics, etc. for plasticization, or high viscosity or slurry of these. For or a substance widely used as a screw-type kneader.

【００３７】さらに、上記説明は単軸混練機について行
ったが、勿論双軸混練機等の多軸混練機にも同様に適用
することができる。本発明による混練機は、本実施例に
記載のものに限定されるものではなく、本発明の要旨を
逸脱しない範囲内において各種各様の変形、付加を行う
ことができる。すなわち、スクリューの直径、構造、種
類、個数等、ねじ溝のねじり角、条数、深さ等、相対す
るシリンダーの形状構造、種類等、原料の供給口、ベン
ト口、溶融樹脂の排出口等の位置などを、従来周知の任
意のものに変更することができる。Furthermore, although the above description has been made with respect to a single-screw kneader, it can be similarly applied to a multi-screw kneader such as a twin-screw kneader. The kneading machine according to the present invention is not limited to the one described in the present embodiment, and various modifications and additions can be made without departing from the gist of the present invention. That is, screw diameter, structure, type, number, etc., screw groove twist angle, number of threads, depth, etc., shape and structure of opposing cylinders, raw material supply port, vent port, molten resin discharge port, etc. The position and the like can be changed to any conventionally known one.

【００３８】[0038]

【発明の効果】以上のように、本発明による混練機は、
スクリューの中程に、スクリューの軸線に垂直な環状突
起を設けると共に、その排出側のねじ溝の少なくとも一
部を、多数の小さいねじり角の溝がこれより大きなねじ
り角の方向に互いに隣接して形成される凹凸底面を有す
るねじ溝としたものであるため、 樹脂材料および添加物は共周りすることなく前進力を
与えられて混練するのでベントから溢れ出ることも少な
く、とくに添加物は投入と同時に母材との混練が始まる
ため、単なる無機質のみならず反応性物質あるいは溶融
温度の異なる樹脂、さらには液状物質を添加するのに極
めて有用である、 樹脂材料が、効率よく溶融混練されて均質化するの
で、安定した押出しが可能となり、その押出量も多く成
形加工性が大幅に向上する、 自掃性に優れているため、色替え、樹脂替えに際して
樹脂の無駄が少なく、短時間で能率的に行える、 設備的に汎用性が高く、少量生産にも適し、得られる
製品の品質も著しく良好である、などの優れた効果を奏
する。As described above, the kneading machine according to the present invention is
An annular protrusion perpendicular to the axis of the screw is provided in the middle of the screw, and at least a part of the screw groove on the discharge side is provided with a large number of grooves with small twist angles adjacent to each other in the direction of a larger twist angle. Since it is a screw groove with a concavo-convex bottom surface to be formed, the resin material and additives do not co-rotate and are mixed by being given an advancing force, so there is little overflow from the vent, especially when additives are added. Since kneading with the base material begins at the same time, it is extremely useful for adding not only inorganic substances but also reactive substances or resins with different melting temperatures, as well as liquid substances. Resin materials are efficiently melt-kneaded and homogeneous. Stable extrusion is possible, the extrusion amount is large and the molding processability is greatly improved, and it has excellent self-cleaning properties, so when changing colors or resins Waste less fat, short time performed efficiently, facilities to versatile, suitable for small production, quality of the resulting products are significantly better, excellent effects such as.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明のスクリュー式混練機の第１の実施例を
示す縦断正面図である。FIG. 1 is a vertical cross-sectional front view showing a first embodiment of a screw-type kneading machine of the present invention.

【図２】本発明のスクリュー式混練機の異なる実施例を
示す縦断正面図である。FIG. 2 is a vertical sectional front view showing another embodiment of the screw-type kneader of the present invention.

【図３】本発明のスクリュー式混練機に用いられるシリ
ンダーの内面形状を示す部分横断斜視図で、（ａ）〜
（ｃ）はそれぞれその異なる態様を示すものである。FIG. 3 is a partial cross-sectional perspective view showing the inner surface shape of a cylinder used in the screw-type kneading machine of the present invention, in which (a)-
(C) shows the different modes, respectively.

【図４】本発明のスクリュー式混練機に用いられるスク
リュ−の要部を示す拡大正面図である。FIG. 4 is an enlarged front view showing a main part of a screw used in the screw type kneader of the present invention.

【図５】図４に示した溝の異なる態様を模式的に示した
縦断面図である。5 is a vertical cross-sectional view schematically showing another aspect of the groove shown in FIG.

【符号の説明】[Explanation of symbols]

１…シリンダー、 ２…スクリュー、 ５、13…ね
じ山、６、11…ねじ溝、 ７…環状突起、 ９…
凹溝、 10…溝。1 ... Cylinder, 2 ... Screw, 5, 13 ... Thread, 6, 11 ... Thread groove, 7 ... Annular protrusion, 9 ...
Recessed groove, 10 ... groove.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】スクリューの中程に、スクリューの軸線に
垂直な環状突起を設けると共に、その排出側のねじ溝の
少なくとも一部を、多数の小さいねじり角の溝がこれよ
り大きなねじり角の方向に互いに隣接して形成される凹
凸底面を有するねじ溝としたことを特徴とするスクリュ
ー式混練機。1. An annular protrusion perpendicular to the axis of the screw is provided in the middle of the screw, and at least a part of the screw groove on the discharge side is provided with a large number of grooves having a small twist angle in the direction of a larger twist angle. A screw-type kneading machine, characterized in that a screw groove having an uneven bottom surface formed adjacent to each other is formed. 【請求項２】前記環状突起および／またはその排出側の
スクリュー部分に相対するシリンダーの内周面に、少な
くとも環状突起および／またはスクリューのねじ山をま
たぐ長さの凹溝が、複数個軸方向に向けて設けられてい
る請求項１記載のスクリュー式混練機。2. A plurality of recessed grooves each having a length at least straddling the thread of the annular projection and / or the screw are formed on the inner peripheral surface of the cylinder facing the annular projection and / or the screw portion on the discharge side thereof. The screw-type kneading machine according to claim 1, which is provided to face.
JP4069667A 1992-02-19 1992-02-19 Screw type kneader Pending JPH05228920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4069667A JPH05228920A (en) 1992-02-19 1992-02-19 Screw type kneader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4069667A JPH05228920A (en) 1992-02-19 1992-02-19 Screw type kneader

Publications (1)

Publication Number Publication Date
JPH05228920A true JPH05228920A (en) 1993-09-07

Family

ID=13409421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4069667A Pending JPH05228920A (en) 1992-02-19 1992-02-19 Screw type kneader

Country Status (1)

Country Link
JP (1) JPH05228920A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957576A (en) * 1995-06-30 1999-09-28 Sumitomo Bakelite Company Limited Screw for in-line screw type thermosetting resin injection molding machine
US6152592A (en) * 1999-02-18 2000-11-28 Klein; Ron J. Mixing devices having an array of spaced apart mixing elements for intercepting a flowing stream of material and contoured to mix constituents in the stream
US6155706A (en) * 1999-02-18 2000-12-05 Klein; Ron J. Mixing devices having an array of interleaved mixing elements for intercepting a flowing stream of material and contoured to mix constituents in the stream
US6497508B1 (en) * 2001-06-15 2002-12-24 New Castle Industries, Inc. Plasticating process, apparatus and screw with mixing
DE102020001456A1 (en) 2020-03-06 2021-09-09 Jochen Hennes Extruder with mixing zone

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957576A (en) * 1995-06-30 1999-09-28 Sumitomo Bakelite Company Limited Screw for in-line screw type thermosetting resin injection molding machine
US6152592A (en) * 1999-02-18 2000-11-28 Klein; Ron J. Mixing devices having an array of spaced apart mixing elements for intercepting a flowing stream of material and contoured to mix constituents in the stream
US6155706A (en) * 1999-02-18 2000-12-05 Klein; Ron J. Mixing devices having an array of interleaved mixing elements for intercepting a flowing stream of material and contoured to mix constituents in the stream
US6497508B1 (en) * 2001-06-15 2002-12-24 New Castle Industries, Inc. Plasticating process, apparatus and screw with mixing
DE102020001456A1 (en) 2020-03-06 2021-09-09 Jochen Hennes Extruder with mixing zone
WO2021175357A1 (en) 2020-03-06 2021-09-10 Jochen Hennes Extruder comprising at least one screw for processing a processing material
DE102020001456B4 (en) 2020-03-06 2022-07-14 Jochen Hennes Extruder with mixing zone

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