JPH059258B2 - - Google Patents

Info

Publication number
JPH059258B2
JPH059258B2 JP27730786A JP27730786A JPH059258B2 JP H059258 B2 JPH059258 B2 JP H059258B2 JP 27730786 A JP27730786 A JP 27730786A JP 27730786 A JP27730786 A JP 27730786A JP H059258 B2 JPH059258 B2 JP H059258B2
Authority
JP
Japan
Prior art keywords
mouth
preform
stretch blow
injection
peripheral wall
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 - Fee Related
Application number
JP27730786A
Other languages
English (en)
Other versions
JPS63130330A (ja
Inventor
Katashi Aoki
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP61277307A priority Critical patent/JPS63130330A/ja
Priority to AU83273/87A priority patent/AU602380B2/en
Priority to DE3752276T priority patent/DE3752276T2/de
Priority to EP19870907675 priority patent/EP0293485B1/en
Priority to PCT/JP1987/000897 priority patent/WO1988003864A1/ja
Priority to KR1019880700855A priority patent/KR950000181B1/ko
Publication of JPS63130330A publication Critical patent/JPS63130330A/ja
Publication of JPH059258B2 publication Critical patent/JPH059258B2/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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0725—Preforms or parisons characterised by their configuration having variable wall thickness at bottom portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0771—Wide-mouth
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明はポリプロピレン、ポリアミド等の合
成樹脂を材料とする容器、びんなどの成形品の射
出延伸吹込成形に関するものである。
〔従来の技術〕
一般に射出延伸吹込成形では、射出成形した有
底プリフオームの口部を挾持固定して、他の部分
を延伸吹込成形している。
〔発明が解決しようとする問題点〕
この場合、成形品の材料樹脂が、ポリプロピレ
ンやポリアミドなどの乳白化し易い合成樹脂であ
ると、延伸吹込成形された部分は二軸配向により
透明になるが、第３図に示すように、成形品２０
の口部２１から肩部２２まで乳白化したままとな
つている。
この乳白部分２３の下縁のほとんどは、肩部２
２に不規則に表われ、このため成形品２０の外観
が損われて商品としての価値が半減する。
そこで本発明者は成形品の肩部２２に生ずる乳
白部材２３の発生原因に付いて、種々の研究を重
ねた結果、口部下側の延伸不足が原因であつて、
この部分から下方が充分に延伸された場合には、
乳白部分２３は口部２１のみとなることを見出し
たのである。
〔問題点を解決するための手段〕
この発明はポリプロピレン、ポリアミドなどの
乳白化し易い材料樹脂をもつて射出延伸吹込成形
された成形品における上記問題点を解決すること
を目的とするもである。
かかる目的によるこの発明は、口部周壁の下部
肉厚を、内側に設けた段部により他の延伸部部よ
りも厚肉となした有底のプリフオームを射出成形
し、そのプリフオームの口部を挾持固定して上記
段部より下方を延伸吹込成形することを要旨とす
る。
以下図面に示す実施例によりこの発明を詳細に
説明する。
〔実施例〕
まず第１図に示すよに、口部１の下部内側に段
部２を有する有底のプリフオーム３を射出成形し
て、口部周壁下部４の肉厚を、上記段部２により
口部１及び底部６の肉厚よりも厚肉に形成する。
上記段部２の形成はリツプ型７及び射出型８と
共にキヤビテイを形成するコア型９の下部周囲に
段部１０を設けることによつて容易に行うことが
できる。
次に第２図に示すように、上記口部１を吹込コ
ア１１の挿入をもつて段部２の位置より挾持固定
し、口部下側及び底部６を、段部２の部分から吹
込型１２のキヤビテイ底部までロツド１３により
延伸し、更にエアーの吹込をもつてキヤビテイ一
杯に膨脹して、プリフオーム３を中空の成形品１
４に成形する。
上記延伸において、最も伸長し易いところは、
他の部分より厚肉に形成された口部周壁下部４の
厚肉部分となる。
延伸される部分のうち、他の部分より厚肉に形
成された口部周壁下部４は、他の部分よりも熱保
有量が多く、延伸吹込成形に至る間に表面温度が
低下しても、その部分の肉厚を他の部分と同じく
した場合と比べて熱の損出は少なく、段部２を境
にして良く延長する。
この結果、延伸吹込成形により段部２より下方
が二軸配向され、口部１を除いて他の部分は透明
となる。また乳白部分と透明部分は図示のように
段部２があつた口部下側を境にして明確に分か
れ、乳白部分の下縁が肩部上にまで及ぶことがな
くなる。
〔発明の効果〕
この発明は上述のように、口部周壁の下部肉厚
を、内側に設けた段部により他の延伸部分よりも
厚肉に形成し、口部周壁下部の熱保有量を大きく
して延伸し易くし、これにより肩部への未配向に
よる乳白化を防止してなるものであるから、材料
樹脂がポリプロピレンやポリアミドであつても、
口部のみが乳白化した容器等を成形することがで
き、また乳白部分と透明部分とが一線を境に美麗
に生じた外観上も極めて好ましい成形品を容易に
成形することができるなどの特長を有する。
【図面の簡単な説明】
第１図及び第２図はこの発明に係る射出延伸吹
込成形法を示すもので、第１図は金型鎖線で示す
プリフオームの断面図、第２図は同じく成形品の
断面図、第３図は従来の成形法による成形品の半
部縦断面図である。 １……口部、２……段部、３……プリフオー
ム、４……口部周壁下部、６……底部、１４……
成形品。

Claims (1)

    【特許請求の範囲】
  1. １ 口部周壁の下部肉厚を、内側に設けた段部に
    より他の延伸部部よりも厚肉となした有底のプリ
    フオームを射出成形し、そのプリフオームの口部
    を挾持固定して上記段部より下方を延伸吹込成形
    することを特徴とするポリプロピレン等の射出延
    伸吹込成形法。
JP61277307A 1986-11-20 1986-11-20 ポリプロピレン等の射出延伸吹込成形法 Granted JPS63130330A (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP61277307A JPS63130330A (ja) 1986-11-20 1986-11-20 ポリプロピレン等の射出延伸吹込成形法
AU83273/87A AU602380B2 (en) 1986-11-20 1987-11-19 Injection stretching blow molding of polypropylene or the like
DE3752276T DE3752276T2 (de) 1986-11-20 1987-11-19 Spritzstreckblasformen von polypropylen oder dergleichen
EP19870907675 EP0293485B1 (en) 1986-11-20 1987-11-19 Injection stretching blow molding of polypropylene or the like
PCT/JP1987/000897 WO1988003864A1 (fr) 1986-11-20 1987-11-19 Moulage par injection-gonflage et etirage
KR1019880700855A KR950000181B1 (ko) 1986-11-20 1987-11-19 폴리프로필렌등의 사출 연신 취입 성형법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61277307A JPS63130330A (ja) 1986-11-20 1986-11-20 ポリプロピレン等の射出延伸吹込成形法

Publications (2)

Publication Number Publication Date
JPS63130330A JPS63130330A (ja) 1988-06-02
JPH059258B2 true JPH059258B2 (ja) 1993-02-04

Family

ID=17581713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61277307A Granted JPS63130330A (ja) 1986-11-20 1986-11-20 ポリプロピレン等の射出延伸吹込成形法

Country Status (6)

Country Link
EP (1) EP0293485B1 (ja)
JP (1) JPS63130330A (ja)
KR (1) KR950000181B1 (ja)
AU (1) AU602380B2 (ja)
DE (1) DE3752276T2 (ja)
WO (1) WO1988003864A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04166663A (ja) * 1990-10-31 1992-06-12 Isuzu Motors Ltd 自動変速機搭載車両の始動制御装置
JP2001121598A (ja) * 1999-10-29 2001-05-08 Aoki Technical Laboratory Inc 広口容器の延伸ブロー成形方法
US20070087214A1 (en) * 2005-10-14 2007-04-19 Portnoy Robert C Methods for stretch blow molding polymeric articles
CN102189670A (zh) * 2010-03-13 2011-09-21 台州市天雅机械模具有限公司 五加仑水桶两次拉吹的加工模具
GB2525651B (en) 2014-05-01 2018-08-08 Gr8 Eng Ltd Blow moulded container and manufacture thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU527922B2 (en) * 1977-12-23 1983-03-31 Emhart Industries Inc. Blow moulding parison
CA1184717A (en) * 1981-08-20 1985-04-02 Yoshiaki Hayashi Blow-molded bottle-shaped container of biaxially oriented polyethylene terephthalate resin and method of molding the same
JPS5836420A (ja) * 1981-08-27 1983-03-03 Yoshino Kogyosho Co Ltd 壜体成形方法
JPS5836121U (ja) * 1981-09-02 1983-03-09 株式会社吉野工業所 ２軸延伸ブロ−成形壜体成形用１次成形品
JPS5850926U (ja) * 1981-10-01 1983-04-06 株式会社吉野工業所 広口壜成形用１次成形品
AU571000B2 (en) * 1983-02-02 1988-03-31 Nissei Asb Machine Co., Ltd. Biaxial orientation of bottles
US4641758A (en) * 1983-11-22 1987-02-10 Yoshino Kogyosho Co., Ltd. Blow-molded bottle-shaped container of biaxially oriented thermoplastic synthetic resin with wide port and method of molding the same

Also Published As

Publication number Publication date
EP0293485A1 (en) 1988-12-07
JPS63130330A (ja) 1988-06-02
WO1988003864A1 (fr) 1988-06-02
AU602380B2 (en) 1990-10-11
KR950000181B1 (ko) 1995-01-11
EP0293485B1 (en) 1999-06-02
KR890700073A (ko) 1989-03-02
AU8327387A (en) 1988-06-16
DE3752276D1 (de) 1999-07-08
EP0293485A4 (en) 1989-06-26
DE3752276T2 (de) 1999-12-16

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