JP2005169764A - Kneader for plastic material - Google Patents

Kneader for plastic material Download PDF

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Publication number
JP2005169764A
JP2005169764A JP2003411416A JP2003411416A JP2005169764A JP 2005169764 A JP2005169764 A JP 2005169764A JP 2003411416 A JP2003411416 A JP 2003411416A JP 2003411416 A JP2003411416 A JP 2003411416A JP 2005169764 A JP2005169764 A JP 2005169764A
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JP
Japan
Prior art keywords
screw
plastic material
hopper
kneading
cylinder
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
JP2003411416A
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Japanese (ja)
Inventor
Kenichi Suzuki
賢一 鈴木
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SUZUSEI KK
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SUZUSEI KK
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Priority to JP2003411416A priority Critical patent/JP2005169764A/en
Publication of JP2005169764A publication Critical patent/JP2005169764A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—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
    • 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
    • B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
    • B29C48/60—Thread tops

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  • 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

<P>PROBLEM TO BE SOLVED: To provide a kneader for a plastic material capable of performing the kneading by excellent melt plasticization by excluding the stagnation of the feed of raw material plastic into a screw. <P>SOLUTION: The kneader 1 for the plastic material is constituted by forming a wave front like depressed surface having a shape, which is formed by excavating the surface on the leading end side of a screw flight 8 which rises at an acute angle with respect to a screw shaft 7 so as to have a chevron-shape cross section, in the predetermined radius of curvature to the part of a screw 6 near to a hopper 5. A difinite amount of the plastic material in the hopper is regularly drawn in a cylinder by the wave front like depressed surface to eliminate the stagnation of the plastic material in the hopper to largely contribute to the plasticizing kneading of the plastic material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、プラスチック原料や顔料などのプラスチック材料を加熱混練して成形に適し
た優れた可塑化物とするための混練装置に関するものである。 The present invention relates to a kneading apparatus for heating and kneading plastic materials such as plastic raw materials and pigments to obtain an excellent plasticized material suitable for molding.

一般にプラスチック材料の混練の機構は、シリンダー内のスクリューで加熱混練して熱
可塑化したプラスチック材料をダイを通して押し出して成形する押出成形機などに包含さ
れている。 In general, a mechanism for kneading a plastic material is included in an extruder for extruding and molding a plastic material that has been heat-kneaded by a screw in a cylinder and plasticized through a die.

上記のスクリュー式の押出成形機の最も一般的な機構は、単軸スクリュー型と呼ばれるもので、ホッパ口より供給部、圧縮部、計量部と呼ばれる領域があり、供給部で充分な熱量を与えて圧縮部で溶融させ、計量部で可塑化溶融したプラスチック材料の一定量を押し出すようにしており、これに用いるスクリューとしてはスクリュー羽根のピッチを一定にしてスクリュー羽根の間の溝の深さ、換言すれば、スクリュー軸の径を先端ほど大きくしたり、前記の溝の深さを一定にしてスクリュー羽根のピッチを先端ほど小さくしたり、あるいはこの両者の併用によって成形材料が先端部に送られるにしたがって次第に緊密に圧縮されて混練できるようになっている。
かゝる混練装置の他の機構として、以下に述べるものが特許文献に存在している。
特開平７−１７１８２４号公報 この特許文献１は、加熱筒壁に螺旋状のフライトを設け、加熱筒中央部の軸心方向に前記フライトと微少間隙を存して円筒状の軸を回転可能に設ける樹脂の可塑化混練装置を開示している。 特開平７−２１４６２４号公報 この特許文献２は、樹脂の逆流防止弁を備えたスクリューを有する射出成形機の混練装置を開示している。 特開平１０−２８６８２２号公報 この特許文献３には軟化点等の物性の異なる複数種類の熱可塑性材料の均一混合に、これら種類の異なる熱可塑性材料を別々に投入して加熱し、これを混練するスクリュー型混練機を開示している。 The most common mechanism of the above screw type extruder is the so-called single screw type, and there are areas called the supply section, compression section, and metering section from the hopper port, giving a sufficient amount of heat at the supply section. The plastic part melted in the compression part, and a certain amount of plastic material plasticized and melted in the metering part is extruded, and the screw used for this is a constant depth of the screw blades with a constant screw blade pitch, In other words, the diameter of the screw shaft is increased toward the tip, the pitch of the screw blades is decreased toward the tip while keeping the depth of the groove constant, or a combination thereof is used to send the molding material to the tip. Accordingly, it is gradually compressed and kneaded.
As other mechanisms of such a kneading apparatus, those described below exist in the patent literature.
In JP-A-7-171824, a spiral flight is provided on the heating cylinder wall, and the cylindrical axis can be rotated with a small gap between the flight in the axial direction of the center of the heating cylinder. An apparatus for plasticizing and kneading a resin to be provided is disclosed. JP, 7-214624, A This patent documents 2 is indicating the kneading device of the injection molding machine which has the screw provided with the backflow prevention valve of resin. Japanese Patent Laid-Open No. 10-286822 discloses that a plurality of types of thermoplastic materials having different physical properties such as a softening point are uniformly mixed and heated, and these different types of thermoplastic materials are separately heated. A screw-type kneader is disclosed.

スクリューによるプラスチック材料の混練の成否にはさまざまな要因が考えられるが、
ホッパに供給したプラスチック材料のスクリューへの食い込みのよしあしもその一つと考
えられる。
すなわち、ホッパに供給された粉末状ないし顆粒状及び液体状などのプラスチック材料は、ホッパ口からシリンダー内の供給部に流れて加熱溶融を受けながら回転するスクリューで圧縮部に送られるのであるが、スクリューの回転によってもプラスチック材料がホッパ側に跳ね返されたりして規則的に引き取られずにスクリューの実質的な空回りによって原料の送り込みが不十分となり、プラスチック材料がホッパ内に停滞するという事態が往々にして発生する。
このような事態になれば、プラスチック材料の溶融可塑化による混練は充分に行われず
に溶融不良や色ムラあるいは気泡の含有などという成形不良が製品に現れることになる。
前記特許文献に開示されている混練装置のうち、特許文献１と２の混練装置は、混練のための機構として殊更複雑な機構を開示しており、特許文献３は、軟化点等の物性の異なる複数種類の熱可塑性材料の投入口をスクリュー型混練機の別々の部位から投入するようにしているが、装置そのものには格別の特殊性がないように認められる。
本発明は前記押出成形機などに使用されている混練装置の上述した問題を解消してスクリューに簡単な機構を付加することにより容易に安定した混練が可能なプラスチック材料の混練装置を提供せんとするものである。 Various factors can be considered for the success or failure of kneading plastic materials with screws.
One of the possible reasons is that the plastic material supplied to the hopper bites into the screw.
That is, the plastic material such as powder, granules and liquid supplied to the hopper flows from the hopper port to the supply part in the cylinder and is sent to the compression part with a screw rotating while being heated and melted. There is often a situation in which the plastic material is not repelled back to the hopper side due to the rotation of the screw, and the material is not sufficiently fed due to the substantially idle rotation of the screw, and the plastic material is stagnated in the hopper. Occur.
If such a situation occurs, the plastic material is not sufficiently kneaded by melt plasticization, and molding defects such as poor melting, uneven color, and the inclusion of bubbles appear in the product.
Among the kneading devices disclosed in the above-mentioned patent documents, the kneading devices in Patent Documents 1 and 2 disclose a particularly complicated mechanism as a mechanism for kneading, and Patent Document 3 discloses physical properties such as a softening point. A plurality of different thermoplastic material inlets are introduced from different parts of the screw-type kneader, but it is recognized that the apparatus itself has no particular specialities.
The present invention provides a plastic material kneading apparatus capable of easily and stably kneading by solving the above-mentioned problems of the kneading apparatus used in the extrusion molding machine and the like and adding a simple mechanism to the screw. To do.

本発明の請求項１は、シリンダー内のスクリューでプラスチック材料を加熱溶融し混練
する装置であって、ホッパ口に近いスクリュ−の部分にスクリュー軸との間で鋭角をなし
て形成されているスクリュー羽根の断面山型に立ち上がる先端側の面を所定の曲率半径で
抉った形状の波頭状の凹陥面を形成してなることを特徴とするプラスチック材料の混練装
置である。
請求項２は、前記スクリューが、スクリュー羽根の外径とピッチが一定で、スクリュー
の基端部より先端部に向けて前記凹陥面が次第に小さくなり、先端部では断面の両側が略対称形となるように設定したものであることを特徴とする請求項１記載のプラスチック材料の混練装置である。 Claim 1 of the present invention is an apparatus for heat-melting and kneading a plastic material with a screw in a cylinder, the screw being formed at an acute angle with a screw shaft at a screw portion near the hopper opening. A plastic material kneading apparatus comprising a wave front-like concave surface having a shape in which a tip-side surface rising in a mountain-shaped section of a blade is rolled with a predetermined radius of curvature.
According to a second aspect of the present invention, in the screw, the outer diameter and pitch of the screw blades are constant, the concave surface gradually decreases from the proximal end portion of the screw toward the distal end portion, and both sides of the cross section are substantially symmetrical at the distal end portion. The plastic material kneading apparatus according to claim 1, wherein the plastic material kneading apparatus is set up as described above.

本発明のプラスチック材料の混練装置は、ホッパ口に近いスクリューの部分にスクリ
ュー軸との間で鋭角をなして形成されているスクリュー羽根の面を所定の曲率半径で抉っ
た形状として波頭状の凹陥面を形成するもので、形成された波頭状の凹陥面がホッパ内の
プラスチック材料の定量をシリンダー内に規則正しく引き入れてホッパ内における停滞を
無くすることができるもので、これによってプラスチック材料の可塑化混練を著しく有効
に行うことができる。 The plastic material kneading apparatus according to the present invention has a crest-like concave-convex shape in which the surface of a screw blade formed at an acute angle with a screw shaft at a portion of a screw near the hopper mouth is formed with a predetermined radius of curvature. It forms a surface, and the formed crest-like concave surface can regularly draw a certain amount of plastic material in the hopper into the cylinder to eliminate stagnation in the hopper, thereby plasticizing the plastic material Kneading can be performed remarkably effectively.

本発明のプラスチック材料の混練装置において、前記凹陥面はスクリュー軸との間で鋭
角をなして形成されているスクリュー羽根の断面山型に立ち上がる先端側の面に形成する
もので、この凹陥面はスクリュー羽根の頂部が庇状に張り出してあたかも波頭のような状
態を呈する。
この波頭状の凹陥面は、スクリューの回転によってこの凹陥面がホッパのプラスチック
材料を規則正しく引き入れてホッパ側への跳ね返りなどを起こすことなく、常時定量のプ
ラスチック材料をシリンダー内に供給することができるのである。
これに用いるスクリューとしては、従来から使用されているスクリュー羽根の外径とピ
ッチが一定で、スクリュー軸の径を基端部より先端部に向けて次第に大きくなるよう設定
したものが好ましい。
このような構造のスクリューに形成される前記波頭状の凹陥面に特別な制限はないが、
供給部の基端側で概ね４．０〜５．０ｍｍφ程度の曲率半径をもって抉った形状とすることが望ましい。
この凹陥面は、スクリューの基端部より先端部に向けて次第に小さくなり、先端部では
断面の両側が略対称形となるように設定するものであるが、その長さは計量部に至るまでの供給部と圧縮部の領域内に留めることが好ましい。
この混練装置は、従来の装置と同様にシリンダーの外周にプラスチック材料の溶融のた
めの所定の温度で加熱できる加熱装置を備えている。 In the plastic material kneading apparatus of the present invention, the concave surface is formed on a surface on the tip side that rises in a cross-sectional chevron shape of the screw blade formed with an acute angle with the screw shaft. The top of the screw blades protrudes like a bowl and looks like a wave front.
This crest-shaped concave surface can supply a constant amount of plastic material into the cylinder without causing the concave surface to pull in the plastic material of the hopper regularly due to the rotation of the screw and causing rebound to the hopper side. is there.
The screw used for this is preferably one in which the outer diameter and pitch of conventionally used screw blades are constant and the diameter of the screw shaft is set to gradually increase from the base end portion toward the tip end portion.
There is no particular limitation on the wave front concave surface formed in the screw of such a structure,
It is desirable to have a shape with a curvature radius of about 4.0 to 5.0 mmφ on the base end side of the supply unit.
This concave surface is set to become gradually smaller from the base end of the screw toward the tip, and the tip is set so that both sides of the cross section are substantially symmetric, but the length of the recess extends to the measuring part. It is preferable to keep in the area of the supply part and the compression part.
This kneading apparatus is provided with a heating device that can be heated at a predetermined temperature for melting the plastic material on the outer periphery of the cylinder as in the conventional apparatus.

図１は押出成形のための本発明のプラスチック材料の混練装置の一実施例を示し、混練
装置１は、基本的にはシリンダー２とこのシリンダー２に内蔵されたスクリュー６からな
っている。
シリンダー２は、筒状をなし、図の左端には装置の先端部Ｙとして口径が絞られて溶融
樹脂を射出する射出口３が形成され、右端は装置の基端部Ｘとしてスクリュー６を回転さ
せ、かつ左右に往復移動させるための図示しない駆動源に繋がっている。
シリンダー２の外周には複数の加熱用のヒーター４，４・・が取り付けられ、右端近傍
の上部には原料となるプラスチック材料を投入し保有するホッパ５が設けられている。
このシリンダー２に内蔵させるスクリュー６は、基端部Ｘより先端部Ｙに向けて次第に
径を大きくしたスクリュー軸７と、このスクリュー軸７の外周を螺旋状に囲繞して設けら
れたスクリュー羽根８からなっている。スクリュー羽根８のピッチはいずれも等しく、羽
根の径も一定である。
たとえば、スクリュー軸７の基端部Ｘ側の径が２０ｍｍφ、先端部Ｙ側の径が３０ｍｍφとして設定し、スクリュー羽根８は外径が３６ｍｍφとしてピッチの間隔を１８ｍｍに設定したものが使用される。
図２のように、スクリュー軸７との角度が鋭角で断面山型に立ち上がるスクリュー羽根
８の先端側の面、すなわち、図の角度θの部分のスクリュー羽根８の面には、４．０ｍｍ
φの曲率半径をもって抉り取った形状の凹陥面９を形成しており、この凹陥面９によって
スクリュー羽根８の頂部が先端部Ｙ側に向けて庇状に張り出してあたかも波頭のような断
面形状を呈しているものである。
因みにこの図２の断面のスクリュー６において、凹陥面９の反対側のスクリュー羽根８
の面は、８．０ｍｍφの曲率半径をもってなだらかな湾曲傾斜面１０を形成している。
なお、このような波頭状の凹陥面９は、スクリューの基端部より先端部に向けて次第に
小さくなり、先端部では断面の両側が略対称形となるように設けられ、また、後記するシリンダー２の供給部ａから圧縮部ｂまでの領域内に留めるようにして形成されている。
かゝる構造の装置１は、以下のとおり使用される。
すなわち、ホッパ５に原料となる粉末ないし顆粒及び液体などのプラスチック材料を投入し、シリンダー２のヒーター４，４・・に通電してシリンダー２を加熱し、スクリュー６を稼働してホッパ５内のプラスチック材料をシリンダー２内に送り込む。
シリンダー２内に送り込まれたプラスチック材料は、スクリュー軸７の回転によって供
給部ａから圧縮部ｂの各領域に移行し、加熱溶融・圧縮等の所定の熱履歴を受けて混練が
行われ、計量部ｃにおいて左右にピストン移動するスクリュー６のストロークによって射
出口３から溶融樹脂が押し出されて図示しない各種の成形、たとえば、射出成形、圧縮成
形、カレンダー成形等に供することができるのである。
スクリュー羽根８に形成した前記波頭状の凹陥面９は、ホッパ５からのプラスチック材
料を規則正しく受入れてホッパ側への跳ね返りなどを起こすことなく、常時定量のプラス
チック材料をシリンダー内に供給すると共に、これを供給部ａから圧縮部ｂに送り込んで
充分に混練し、計量部ｃを経て加熱溶融可塑化された理想的な溶融樹脂として前記した各
種の成形に供することができるのである。 FIG. 1 shows an embodiment of a plastic material kneading apparatus of the present invention for extrusion molding. The kneading apparatus 1 basically comprises a cylinder 2 and a screw 6 built in the cylinder 2.
The cylinder 2 has a cylindrical shape, and an injection port 3 is formed at the left end of the drawing as the tip end portion Y of the apparatus, the diameter of which is reduced to inject molten resin, and the right end rotates the screw 6 as the base end portion X of the apparatus. And a drive source (not shown) for reciprocating left and right.
A plurality of heaters 4, 4... Are attached to the outer periphery of the cylinder 2, and a hopper 5 that holds and holds a plastic material as a raw material is provided in the upper part near the right end.
The screw 6 incorporated in the cylinder 2 includes a screw shaft 7 having a diameter that gradually increases from the base end portion X toward the tip end portion Y, and screw blades 8 provided so as to spirally surround the outer periphery of the screw shaft 7. It is made up of. The pitch of the screw blades 8 is the same, and the blade diameter is also constant.
For example, the diameter of the screw shaft 7 on the base end X side is set to 20 mmφ, the diameter on the tip end Y side is set to 30 mmφ, and the screw blade 8 having an outer diameter of 36 mmφ and a pitch interval of 18 mm is used. .
As shown in FIG. 2, the surface on the tip end side of the screw blade 8 that rises in a cross-sectional mountain shape with an acute angle with the screw shaft 7, that is, the surface of the screw blade 8 at the angle θ in the figure is 4.0 mm.
A concave surface 9 having a shape with a curvature radius of φ is formed, and the top surface of the screw blade 8 protrudes in a bowl shape toward the tip Y side by the concave surface 9 so as to have a cross-sectional shape like a wave front. It is what is presented.
Incidentally, in the screw 6 having the cross section of FIG. 2, the screw blade 8 on the opposite side of the recessed surface 9.
This surface forms a gently curved inclined surface 10 with a radius of curvature of 8.0 mmφ.
In addition, such a wave-front-like concave surface 9 is gradually reduced from the base end portion of the screw toward the tip end, and is provided so that both sides of the cross section are substantially symmetrical at the tip end portion. 2 is formed so as to remain in the region from the supply part a to the compression part b.
The apparatus 1 having such a structure is used as follows.
That is, a plastic material such as powder or granules and liquid as raw materials is put into the hopper 5, the cylinder 2 is heated by energizing the heaters 4, 4... Of the cylinder 2, the screw 6 is operated, and the inside of the hopper 5 A plastic material is fed into the cylinder 2.
The plastic material fed into the cylinder 2 is transferred from the supply part a to the compression part b by the rotation of the screw shaft 7 and is kneaded by receiving a predetermined heat history such as heat melting and compression. The molten resin is pushed out from the injection port 3 by the stroke of the screw 6 that moves the piston left and right in the part c, and can be used for various moldings (not shown) such as injection molding, compression molding, and calendar molding.
The crest-shaped concave surface 9 formed on the screw blade 8 regularly receives the plastic material from the hopper 5 and constantly supplies a constant amount of plastic material into the cylinder without causing rebound to the hopper side. Can be fed from the supply part a to the compression part b, kneaded sufficiently, and subjected to the above-described various moldings as an ideal molten resin that has been heat melt plasticized via the metering part c.

本発明のプラスチッツ材料の混練装置は、ホッパ口に近いスクリューの部分にスクリュ
ー軸７との間が鋭角で断面山型に立ち上がる先端側のスクリュー羽根の面を所定の曲率半
径で抉った形状の波頭状の凹陥面を形成するというすこぶる簡単な構成により、ホッパ内
のプラスチック材料の定量を常時シリンダー内に規則正しく引き入れてホッパ内における
プラスチック材料の停滞を無くしてプラスチック材料の可塑化混練に大きく貢献すること
ができるので、利用価値のきわめて高い発明である。 The plastitz material kneading apparatus according to the present invention has a crest having a shape in which the surface of a screw blade on the tip side rising in a cross-sectional shape with an acute angle between the screw shaft 7 and a screw portion close to the hopper mouth is formed with a predetermined radius of curvature. The plastic material in the hopper is regularly drawn into the cylinder at regular intervals by the extremely simple structure of forming a concave concave surface, which contributes greatly to plasticizing and kneading the plastic material by eliminating the stagnation of the plastic material in the hopper. Therefore, it is an invention with extremely high utility value.

本発明のプラスチック材料の混練装置の構造の一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the structure of the kneading | mixing apparatus of the plastic material of this invention. 図１のプラスチック材料の混練装置のスクリューの部分拡大縦断面図である。FIG. 2 is a partially enlarged longitudinal sectional view of a screw of the plastic material kneading apparatus in FIG. 1.

符号の説明Explanation of symbols

１ プラスチック材料の混練装置
２ シリンダー
３ 射出口
４ ヒーター
５ ホッパ
６ スクリュー
７ スクリュー軸
８ スクリュー羽根
９ 波頭状の凹陥面
１０ 湾曲傾斜面
Ｘ 基端部
Ｙ 先端部
ａ 供給部
ｂ 圧縮部
ｃ 計量部 DESCRIPTION OF SYMBOLS 1 Plastic material kneading apparatus 2 Cylinder 3 Injection port 4 Heater 5 Hopper 6 Screw 7 Screw shaft 8 Screw blade 9 Crest-shaped concave surface 10 Curved inclined surface X Base end portion Y Front end portion a Supply portion b Compression portion c Metering portion

Claims (2)

シリンダー内のスクリューでプラスチック材料を加熱溶融し混練する装置であって、ホ
ッパ口に近いスクリュ−の部分にスクリュー軸との間で鋭角をなして形成されているスク
リュー羽根の断面山型に立ち上がる先端側の面を所定の曲率半径で抉った形状の波頭状の
凹陥面を形成してなることを特徴とするプラスチック材料の混練装置。 A device that heats, melts and kneads a plastic material with a screw in a cylinder and rises in a cross-sectional shape of a screw blade formed at an acute angle with the screw shaft at the screw portion near the hopper opening An apparatus for kneading a plastic material, characterized by forming a wave front-like concave surface having a shape in which a side surface is rolled with a predetermined radius of curvature. 前記スクリューが、スクリュー羽根の外径とピッチが一定で、スクリューの基端部より
先端部に向けて前記凹陥面が次第に小さくなり、先端部では断面の両側が略対称形となるように設定したものであることを特徴とする請求項１記載のプラスチック材料の混練装置。 The screw is set so that the outer diameter and pitch of the screw blade are constant, the concave surface gradually decreases from the base end of the screw toward the tip, and both sides of the cross section are substantially symmetrical at the tip. 2. The plastic material kneading apparatus according to claim 1, wherein the apparatus is a kneading apparatus.
JP2003411416A 2003-12-10 2003-12-10 Kneader for plastic material Pending JP2005169764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003411416A JP2005169764A (en) 2003-12-10 2003-12-10 Kneader for plastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003411416A JP2005169764A (en) 2003-12-10 2003-12-10 Kneader for plastic material

Publications (1)

Publication Number Publication Date
JP2005169764A true JP2005169764A (en) 2005-06-30

Family

ID=34732155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003411416A Pending JP2005169764A (en) 2003-12-10 2003-12-10 Kneader for plastic material

Country Status (1)

Country Link
JP (1) JP2005169764A (en)

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US11110638B2 (en) 2014-05-08 2021-09-07 Shibaura Machine Co., Ltd. Extruder screw having paths within the screw, extruder, and extrusion method
US11220022B2 (en) 2014-04-24 2022-01-11 Shibaura Machine Co., Ltd. Extruder screw having paths within the screw, extruder, and extrusion method
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US11224991B2 (en) 2014-04-24 2022-01-18 Shibaura Machine Co., Ltd. Extruder screw having paths within the screw, extruder, and extrusion method
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US11230033B2 (en) 2015-04-28 2022-01-25 Shibaura Machine Co., Ltd. Extruder screw including conveyance portions and paths within the conveyance portions, extruder, and extrusion method
US11229889B2 (en) 2015-04-28 2022-01-25 Shibaura Machine Co., Ltd. Extruder screw with alternately-arranged conveyance portions and extruders and extrusion methods using the extruder screw
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