JPS6151971B2 - - Google Patents

Info

Publication number
JPS6151971B2
JPS6151971B2 JP53125454A JP12545478A JPS6151971B2 JP S6151971 B2 JPS6151971 B2 JP S6151971B2 JP 53125454 A JP53125454 A JP 53125454A JP 12545478 A JP12545478 A JP 12545478A JP S6151971 B2 JPS6151971 B2 JP S6151971B2
Authority
JP
Japan
Prior art keywords
screw
groove depth
resin
outer diameter
diameter
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.)
Expired
Application number
JP53125454A
Other languages
English (en)
Other versions
JPS5551543A (en
Inventor
Isamu Tanimoto
Kuniaki Endo
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine 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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP12545478A priority Critical patent/JPS5551543A/ja
Publication of JPS5551543A publication Critical patent/JPS5551543A/ja
Publication of JPS6151971B2 publication Critical patent/JPS6151971B2/ja
Granted 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
    • B29C48/395—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
    • 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
    • B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
    • B29C48/525—Conical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 本発明はプラスチツクを加工するための少くと
も２本のスクリユが互いに噛合つて異方向回転す
る多軸押出機のスクリユに係り特にスクリユ外径
が根本部から先端部に向つてテーパ状に細くなつ
ているコニカルスクリユに関する。
コニカル形異方向回転の多軸押出機は樹脂の可
塑化がねじ山の間の剪断力により行われるため発
熱が少く、樹脂温度が低いこと、また圧縮を大き
くすることが容易で樹脂の混練が良いことから粘
度の高い樹脂、例へば硬質塩ビ樹脂の成形に有効
である。
この種押出機のスクリユは従来より、その溝深
さが全長にわたり一定のものとスクリユ外径に比
例して溝深さが変化するものとがある。
前者は溝深さｈ、スクリユ外径Ｄとした場ｈ／
Ｄはスクリユ根本部では小さく、スクリユ先端部
では大きくなる。この場合、溝深さｈはスクリユ
先端部外径D1によつて決まる、即ち前記外径D1
より溝深さｈを決定したときその谷径d1は強度的
に十分な径を保つ必要があり、所定径以下にする
ことが出来ないので溝深さh1はあまり大きく取れ
ず制限される。そのためフイード部の送りが不足
した場合にはスクリユのリードを大きくして送り
能力を大きくしなければならずねじ山数が減少
し、樹脂のバレル内での滞留時間が少くなり予熱
効果が落ちて樹脂押出量が少くなる欠点がある。
また後者の場合、スクリユ外径の大きいフイード
部では樹脂の送り能力が大きく、先端に行くに従
つて溝が浅くなり、圧縮比が大きく予熱が十分に
行われないと圧力のみ大きくなりスクリユに過大
なトルクが負荷され機械破損の原因となるばかり
か、溝深さが深いとバレルからの熱が樹脂に伝わ
りにくく予熱が不十分になり易い等の欠点があ
る。
通常第１図のように２本のスクリユが互いに噛
合いながら回転する斜軸押出機においては、スク
リユ中心角θは約２゜30′〜３゜程度であり芯間
距離Ｃは根本部C2が大きく先端部C1が最小とな
る。従つてスクリユ溝深さｈは芯間距離Ｃとスク
リユ外径Ｄとによつて決まりスクリユ外径と谷径
とのスキマがない場合はｈ＝Ｄ−Ｃとなる。
本発明は前述のような欠点を取り除き、根本部
の溝深さh2を深く、しかも先端部溝深さh1は前述
の従来例のように極端に浅くならないようh2とh1
が関連性を保ちつつ変化するようにしたものであ
り、即ち前述の２従来例の中間となるようh2＝h1
×Ｃ２／Ｃ１（0.6〜0.75）とし、h2が決定されれば、
ス クリユ外径は自動的に決定し、従来のように圧縮
が過大になる欠点を補う為C2／C1（0.6〜0.75）
にしたものである。
本発明者等はテストとして先端径D1＝56mm、
h1＝12mmのときh2＝h1×Ｃ２／Ｃ１×0.7としたスクリ
ユ により硬質塩ビパイプの成形テストを行つたとこ
ろ押出量240Kg／Ｈが得られ、これは従来の溝深
さ一定のスクリユの押出量200Kg／Ｈと比べ20％
増となつた。
【図面の簡単な説明】
第１図はコニカル押出機スクリユの説明図。第
２図は第１図における断面―図。

Claims (1)

  1. 【特許請求の範囲】 １ 互いに噛合いながら異方向回転するコニカル
    多軸押出機のスクリユにおいて、フイード部溝深
    さh2は先端部溝深さh1、芯間距離が先端部c1、根
    本部c2としたときh2＝h1×ｃ２／ｃ１（0.6〜0.75）の
    関係 にあることを特徴とするスクリユ。
JP12545478A 1978-10-12 1978-10-12 Conical multi-shaft extruder screw Granted JPS5551543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12545478A JPS5551543A (en) 1978-10-12 1978-10-12 Conical multi-shaft extruder screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12545478A JPS5551543A (en) 1978-10-12 1978-10-12 Conical multi-shaft extruder screw

Publications (2)

Publication Number Publication Date
JPS5551543A JPS5551543A (en) 1980-04-15
JPS6151971B2 true JPS6151971B2 (ja) 1986-11-11

Family

ID=14910486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12545478A Granted JPS5551543A (en) 1978-10-12 1978-10-12 Conical multi-shaft extruder screw

Country Status (1)

Country Link
JP (1) JPS5551543A (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58110226A (ja) * 1981-12-22 1983-06-30 マプラン・マシ−ネン・ウント・テクニツシエ・アンラ−ゲン・プラヌングス・ウント・フエルテイグングス・ゲゼルシヤフト・エムベ−ハ− 二重スクリユ−プレス
CA2049256A1 (en) * 1990-08-22 1992-02-23 Masao Moriyama Twin conical screw extruder
EP0744269A3 (en) * 1995-05-24 1997-09-10 American Maplan Corp Twin screw extruder
IT1282578B1 (it) * 1996-02-07 1998-03-31 Pomini Spa Procedimento e macchina per la mescolazione con laminazione in continuo di materiale termoplastico
US6609819B2 (en) * 2001-07-24 2003-08-26 Wenger Mfg Twin screw extruder with conical non-parallel converging screws
DE10359774A1 (de) * 2003-12-19 2005-07-14 Thyssenkrupp Elastomertechnik Gmbh Vorrichtung
JP4813826B2 (ja) * 2005-06-09 2011-11-09 三菱重工業株式会社 二軸フィーダ並びにこれを用いたシーティング装置及び混練システム
JP5027717B2 (ja) * 2008-04-08 2012-09-19 株式会社モリヤマ ２軸押出機
WO2011153557A1 (de) * 2010-06-09 2011-12-15 Helmuth Schulz Vorrichtung zur verarbeitung von material durch mischung und/oder plastifizierung

Also Published As

Publication number Publication date
JPS5551543A (en) 1980-04-15

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