JPS609727A - 改良型二軸混練押出機 - Google Patents

改良型二軸混練押出機

Info

Publication number
JPS609727A
JPS609727A JP58116001A JP11600183A JPS609727A JP S609727 A JPS609727 A JP S609727A JP 58116001 A JP58116001 A JP 58116001A JP 11600183 A JP11600183 A JP 11600183A JP S609727 A JPS609727 A JP S609727A
Authority
JP
Japan
Prior art keywords
screw
section
extruder
resin
kneading extruder
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.)
Granted
Application number
JP58116001A
Other languages
English (en)
Other versions
JPS6357219B2 (ja
Inventor
Nobuhisa Kobayashi
伸久 小林
Minoru Yoshida
稔 吉田
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP58116001A priority Critical patent/JPS609727A/ja
Publication of JPS609727A publication Critical patent/JPS609727A/ja
Publication of JPS6357219B2 publication Critical patent/JPS6357219B2/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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. 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
    • B29C48/25—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
    • B29C48/41—Intermeshing counter-rotating 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
    • B29C48/25—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
    • B29C48/535—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
    • B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped 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
    • B29C48/505—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
    • B29C48/76—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
    • B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
    • 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
    • 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
    • B29C48/762—Vapour stripping

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は二軸混練押出機の改善に関するものであるが、
スクリューに独自の設計を加えたものである。
合成樹脂成形用の二軸押出機のスクリューは材料供給口
たるホッパーに近い供給部、次いで混線部、更に計量化
部となっている。しかして、従来樹脂中の揮発物の脱気
のため供給部或は混線部において水を注入し、この注入
された水と高温の樹脂とを充分に混練し、樹脂中に含ま
れている揮発物を水蒸気とともに混線部前方（下流側）
に設けたベントから排出する方法が採用されている。し
かしながら、従来の押出機スクリューはスクリュー軸の
供給部及び混線部の全長に亘りスクリュー溝、即ちスク
リューフライトが設けられている。ところで、スクリュ
ー軸の回転によって樹脂去は前方（下流側）への推進力
が付与されるが、注入された水が気化し、これが一部逆
流しホラ、ａ−に迄至ることがある。
そのため樹脂原料の供給が妨げられ、また樹脂の流れが
不安定となり押出機の運転が安定せずサージング現象を
起こし、更には一旦可塑化溶融した樹脂がホッパ一部で
固化する等の欠点が存していた。
本発明は従来の押出機の上記欠点を克服することを目的
としたものである。本発明に係る二軸混練押出機は、そ
のスクリューに押出機の水注入口より上流側において、
一部スクリユーフライトを設けず、スクリュー溝外径に
等しい丸棒状の部分を設けたことを特徴とする（以下、
この部分をリカット部分という）。即ち、供給部より前
進せしめられ一部可塑化溶融した樹脂は、このリカット
部分で推進力を弱められ滞留することとなるが、その際
押出機シリンダー内面とりカット部分スクリュー軸外面
との間に形成されるドーナツ状の空間に樹脂が充満する
。
そして供給部上流側より該空間に押出された樹脂の量に
応じて、該空間より樹脂が更に前進する。しだがって、
リカット部分の該空間には一部可塑化溶融した樹脂が常
に充満している。そのだめ押出機シリンダー内面幅回転
するスクリューとの間にベアリング効果を生ずることと
なり、スクリューのかじり現象を回避できるばかりでな
く、下流側にて注入・気化した水蒸気の上流側への逆流
を防止することができる。その結果上記した従来装置の
欠点を解決することができ、押出機の運転が安定したも
のとなる。
以下、本発明の実施例につき説明する。第１図は異方向
二軸噛み合い型押出機の正断面図で　゛ある。リカット
部分８は、スクリュー供給部５と混練部６との間に、ま
た水注入口１１は混練部上原端にそれぞれ設けられてい
る。２はホッパー、６は脱気用にントで、７はスクリュ
ー計量化部である。ホッパー２に供給された樹脂原料は
供給部５にてかくはん前進せしめられ一部可塑化溶融し
、次いでリカット部分８に滞留充満し、更に混練部６、
計量化部７を経て押出される。−力水注入口１１が混線
部乙の上流端に設けてあり、注入された水は押出機内に
て気化し、樹脂中に含まれている揮発物とともに脱気ベ
ント３より排出される。本実施例によれば上記した従来
装置の欠点を回避できるが、スクリュー駆動軸に回転力
を付与する主電動機の電流値の変動をみると、従来装置
では第３図に示すように電流の振巾が大きく運転が極め
て不安定であるが、本実施例ではりカット部分のベアリ
ング効果によシミ流値の変動は第４図に示すように極め
て小さく安定している。
【図面の簡単な説明】
第１図は異方向噛み合い型押出機の正断面図、第２図は
第１図の■−■線断面図、第３図は従来装置の主電動機
の電流値の変化を示すグラフ、第４図は本発明実施例の
同変化を示すグラフである。 １・・・押出機、２・・・ホッパー、６・・・脱気用ベ
ント、５・・・スクリュー供給部、６・・・スクリュー
混練部、７・・・スクリュー計量化部、８・・・スクリ
ュ　５　− 一すカット部分、１１・・・水注入口。 　６　− 特開昭ＧＯ−９７２７（３）

Claims (1)

    【特許請求の範囲】
  1. 二軸混練押出機において、押出機水注入位置より上流側
    のスクリューの部分長に亘シ、スクリューフライトを設
    けないことを特徴とする改良型二軸混練押出機。
JP58116001A 1983-06-29 1983-06-29 改良型二軸混練押出機 Granted JPS609727A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58116001A JPS609727A (ja) 1983-06-29 1983-06-29 改良型二軸混練押出機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58116001A JPS609727A (ja) 1983-06-29 1983-06-29 改良型二軸混練押出機

Publications (2)

Publication Number Publication Date
JPS609727A true JPS609727A (ja) 1985-01-18
JPS6357219B2 JPS6357219B2 (ja) 1988-11-10

Family

ID=14676380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58116001A Granted JPS609727A (ja) 1983-06-29 1983-06-29 改良型二軸混練押出機

Country Status (1)

Country Link
JP (1) JPS609727A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223119A (ja) * 1984-04-20 1985-11-07 Hitachi Ltd ２軸方向非接触駆動形精密移動台
JPS63122114U (ja) * 1987-02-03 1988-08-09

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3023435U (ja) * 1995-10-03 1996-04-16 株式会社三裕商会 座席カバー収納ケース

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51566A (en) * 1974-06-25 1976-01-06 Japan Steel Works Ltd 2 jikubentogataoshidashiki

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51566A (en) * 1974-06-25 1976-01-06 Japan Steel Works Ltd 2 jikubentogataoshidashiki

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223119A (ja) * 1984-04-20 1985-11-07 Hitachi Ltd ２軸方向非接触駆動形精密移動台
JPS63122114U (ja) * 1987-02-03 1988-08-09

Also Published As

Publication number Publication date
JPS6357219B2 (ja) 1988-11-10

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