JPS608035A - 発泡異形押出成形法 - Google Patents

発泡異形押出成形法

Info

Publication number
JPS608035A
JPS608035A JP58115090A JP11509083A JPS608035A JP S608035 A JPS608035 A JP S608035A JP 58115090 A JP58115090 A JP 58115090A JP 11509083 A JP11509083 A JP 11509083A JP S608035 A JPS608035 A JP S608035A
Authority
JP
Japan
Prior art keywords
sizer
die
deformed
extruded
expanded product
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
JP58115090A
Other languages
English (en)
Inventor
Hiroshi Shibano
博 柴野
Tadaatsu Kasuga
春日　直温
Katsuji Ohira
大平　克次
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
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 Showa Denko KK filed Critical Showa Denko KK
Priority to JP58115090A priority Critical patent/JPS608035A/ja
Publication of JPS608035A publication Critical patent/JPS608035A/ja
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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • 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
    • B29C48/06—Rod-shaped
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (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】 本発明は円筒又は丸棒の外周に螺旋状の突起部を有する
発泡倍率０．０５〜５倍の発泡異形押出成形品の成形法
に関する。
本発明の目的は、断面が円形の丸棒又は円筒の外周に螺
旋状の突起部を有する種々の発泡異形押出成形品を得る
ことにあり、この成形品の具体的な用途としては、家具
類の足、粉体輸送用のスクリュー、掃除機吹込口の回転
ブラシ台、ケーブル類の支持体、液体輸送時のスタティ
ックミキサー、光フアイバー用スペーサー等が上げられ
る。
以下に本発明の概要を図面によって説明すると第１図の
側面図（一部所面図）において、熱可塑性樹脂と発泡剤
を混合したコンパウンドを押出機１のホッパーより投入
してダイス２より押出す。
押出された溶融樹脂は、所定の間隔をおいて配置された
サイザー３によって賦形され、冷却水槽４を経て適度に
発泡した異形成形品５は引取機６によって引取られる。
サイザー４はチェイン７を通じて駆動モーター８によっ
て回転させられる。なお成形品の突起部の螺旋角度は押
出速度とサイザーの回転速度によって任意に変えること
が可能である。
本発明における熱可塑性樹脂としては、ポリエチレン、
ポリプロピレン、ポリスチレン、ポリ塩化ビニル、ＡＢ
ＳｌＡｓ、ポリカーボネート、ナイロン等押出機により
連続的に押出可能な樹脂が挙げられ、発泡させるには、
固体発泡剤、気体発泡剤のいずれも採用でき、発泡倍率
は０．０５〜５倍好ましくは０１〜３倍であり、０．０
５倍未満では賦形が困難であシ、５倍を超えると成形品
の強度が低下して実用上問題となる。なおここにおける
発泡倍率は無発泡状態の密度を発泡後の密度で除した商
（倍）から１（倍）を差引いたものである。
円筒又は丸棒の外周に螺旋状突起部を設けるには、溶融
した発泡性熱可塑性樹脂を押出しながらダイスおよびサ
イザーを回転させることによる。
押出速度とサイザーの回転速度の比は要求される螺旋部
のピッチに応じて任意に連続的に変えることができる。
ダイスとサイザーの間隔は、成形速度、発泡倍率によっ
て異なるが、最低５闘から最大５０ｍｍであり好ましく
は１０ｍｍから３０闘である。ダイスとサイザーの間隔
が５闘未満の場合は、ダイスから出た溶融樹脂が発泡剤
によって十分カ発泡倍率に達せず、間隔が５０ｍｍを越
える場合は遅発泡状態になり押出物がサイザーにスムー
スに入り難い。
又、サイザーは吸引機構を備えることが必要であり、第
１図のように吸引孔９を設けることにより、賦形が十分
となり平滑な表面が得られる。吸引孔はサイザーの胴内
径２０ｍｍの場合に円周方向６〜８個位でよく、真空度
は０．０５〜０．５　Ｔｏｒｒが好ましく　、０．０５
Ｔｏｒｒ未満では効果が不充分であり、ｏ、ｉＩ協える
と引取抵抗が過大となる。
以下本発明の効果について述べる。
丸棒又は円筒の外周に螺旋状の突起部のついた異形成形
品を成形する場合、成形品の長さが比較的短かい場合は
射出成形によっても成形することが可能であるが、この
方法では複雑な分割金型を使用しなければならず全型代
が高価につくし、金型分割部の線が成形品に現われて外
観上好ましくない。又、成形品の断面積が大きくなると
成形に時間がかかり、成形コストが高くつく。更に長さ
が１ｍを越える様な長尺品を成形する場合、射出成形で
は無理がある。
押出成形によって螺旋状突起部のついた成形品をつくる
場合、ダイス、サイザーは固定とし、成形品を回転させ
ながら引取る方法もあるが、引取機の機構が複雑になり
高価になる。また回転速度と引取速度を独立に作動させ
る様な機構をつくることは更に高価になる可能性がある
。それに対して本発明のようにサイザーを回転させ、引
取機は通常のものを使用する方が成形品状に対する自由
度が大きいし、機械の製作価格も安価である。
本発明では、螺旋状突起部を有する異形成形品は同時に
発泡成形品であるが、ダイスとサイザーの間に間隙を設
けることにより、ダイスより押出された発泡剤入り溶融
樹脂は大気圧下で発泡を開始するので、ダイス、サイザ
ーの間隔を適宜調節することによって発泡倍率、発泡セ
ル、表面状態を調整することが可能である。また、ダイ
スとサイザーを密着させて成形する場合よりも、良好な
表面状態が得られると同時に成形速度も速くすることが
可能である。
又、螺旋状突起部の断面形状は、四角形、三角形、半円
形等、巾、高さを含めて適宜採用できる。
以上のように本発明によれば、螺旋状突起部を有する発
泡異形成形品を、形状、寸法の大きな自由度を持って、
良好な寸法精度を伴なって安価に成形できる。
以下に実施例を示して本発明をさらに詳細に説明する。
実施例 メルトフローレート４．５．！７／１０ｍｍのポリスチ
レン１００重量部に発泡剤ＡＤＯＡ（アゾジカルボンア
ミド）０．７重量部、発泡助剤酸化亜鉛０１重量部をト
ライブレンドし、バレル径４０闘の単軸押出機を用い内
径６ｍｍのオリフィス輪郭を有するダイスから押出速度
３００　ｍｍ１ｍｍ、引取速度１００ｍｍ７ｍｍで丸棒
体を溶融押出した後回転サイザーにより賦形した。
ダイスとサイザーの間隔を５０闘とし、サイザーは長さ
３００＋＋ｍで内部はテーパーなしで径１ｍｍの吸引孔
を円周方向に１列ランド３０ｍｍの位置に凹溝最深部を
含めて８個穿ち、真空度０．１　Ｔｏｒｒとした。その
サイザーを毎分２回転させて押出物を徐々に賦形し、丸
棒の胴径２０ｍｍで２条の断面三角形で底辺６ｍｍ、高
さ５ｍｍのピンチ５００１ｍの螺旋状の突起部を有する
外観の良好な発泡倍率２倍の発泡異形押出成形品を得た
。
【図面の簡単な説明】
第１図は本発明の概要を示す側面図（一部所面図）であ
る。 １　押出機、２　ダイス、３　サイザー、４−・・冷却
水槽、５　発泡した異形成形品、６・・・引取機、７　
チェイン、８・・駆動モーター、９・・・吸引孔。 特許出願人　昭和電工株式会社 代　理　人　弁理士　菊地精− 第１図

Claims (1)

    【特許請求の範囲】
  1. 円筒又は丸棒の外周に螺旋状の突起部を有する発泡倍率
    ００５〜５倍の発泡異形押出成形品を成形する際、ダイ
    スと間隔を置いて設けた吸引機構を備えたサイザーの回
    転により押出物を賦形することを特徴とする発泡異形押
    出成形法。
JP58115090A 1983-06-28 1983-06-28 発泡異形押出成形法 Pending JPS608035A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58115090A JPS608035A (ja) 1983-06-28 1983-06-28 発泡異形押出成形法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58115090A JPS608035A (ja) 1983-06-28 1983-06-28 発泡異形押出成形法

Publications (1)

Publication Number Publication Date
JPS608035A true JPS608035A (ja) 1985-01-16

Family

ID=14653948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58115090A Pending JPS608035A (ja) 1983-06-28 1983-06-28 発泡異形押出成形法

Country Status (1)

Country Link
JP (1) JPS608035A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1042112A4 (en) * 1997-12-29 2001-12-19 Owens Corning Fiberglass Corp EXTRUSION MACHINE WITH CLOSED ENCLOSURE AND METHOD THEREOF, WITH PROCESS CONTROL
WO2004006734A1 (ja) * 2002-07-16 2004-01-22 Misawa Homes Co., Ltd. 木質様成形品、製造装置及び製造方法
KR100442726B1 (ko) * 2002-03-06 2004-08-02 고재권 표면을 강화한 전선보호관의 제조방법과 이에 의해 제조한전선보호관
JP2008105374A (ja) * 2006-09-28 2008-05-08 Kohjin Co Ltd 滅菌紙

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1042112A4 (en) * 1997-12-29 2001-12-19 Owens Corning Fiberglass Corp EXTRUSION MACHINE WITH CLOSED ENCLOSURE AND METHOD THEREOF, WITH PROCESS CONTROL
KR100442726B1 (ko) * 2002-03-06 2004-08-02 고재권 표면을 강화한 전선보호관의 제조방법과 이에 의해 제조한전선보호관
WO2004006734A1 (ja) * 2002-07-16 2004-01-22 Misawa Homes Co., Ltd. 木質様成形品、製造装置及び製造方法
US8007881B2 (en) 2002-07-16 2011-08-30 Misawa Homes Co., Ltd. Wood-like molded product, manufacturing apparatus for the same, and manufacturing method of the same
JP2008105374A (ja) * 2006-09-28 2008-05-08 Kohjin Co Ltd 滅菌紙

Similar Documents

Publication Publication Date Title
US3857914A (en) Method for extruding a foamed, molded article
US3478138A (en) Method of making thermoplastic articles having non-planar surface contours
US3922328A (en) Method for making structural foam profiles
US4154563A (en) Apparatus for making structural profiles
JPH0447615B2 (ja)
US4022557A (en) Apparatus for making structural foam profiles
US6533974B1 (en) Method of forming a profile on a foam rod
US3172154A (en) Extrusion apparatus
JPS608035A (ja) 発泡異形押出成形法
US3941544A (en) Apparatus for the preparation of foamed thermoplastic extruded profiles
US3890416A (en) Method for producing a cavity or a zone of very low density in the interior of extruded profiles of foamable thermoplastics
CA2011321A1 (en) Method for producing spiral pipes with rib and apparatus therefor
US3876740A (en) Process for improving interior surface smoothness and gloss in foamed tubular extrudates by the use of extrusion die faces of novel geometry
JPS61244522A (ja) 発泡性プラスチツク材料の押出し法
JPS59164122A (ja) 発泡異形押出成形法
CA2052137A1 (en) Process and apparatus for the manufacture of a columnar body
JPS608034A (ja) 発泡異形押出成形法
JPS61209135A (ja) 熱可塑性合成樹脂製筋入フイルムの製造方法
US3966373A (en) Apparatus for the continuous extrusion of small cross-section thermoplastic foam profiles
US3976419A (en) Die restrictions to obtain smooth surfaces on foam extrudates
US3632266A (en) Continuous apparatus for extruding and forming thermoplastic articles
US3478139A (en) Method of extruding tubular webbing and cross-ribbed tubular film
JPS5465771A (en) Manufacturing device for thermoplastic synthetic resin board foam
US3829269A (en) Foam plastic loose fill packing
JPS6337231Y2 (ja)