JPS63130330A - ポリプロピレン等の射出延伸吹込成形法 - Google Patents

ポリプロピレン等の射出延伸吹込成形法

Info

Publication number
JPS63130330A
JPS63130330A JP61277307A JP27730786A JPS63130330A JP S63130330 A JPS63130330 A JP S63130330A JP 61277307 A JP61277307 A JP 61277307A JP 27730786 A JP27730786 A JP 27730786A JP S63130330 A JPS63130330 A JP S63130330A
Authority
JP
Japan
Prior art keywords
mouth
stepped
mold
perform
blow molding
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
JP61277307A
Other languages
English (en)
Other versions
JPH059258B2 (ja
Inventor
Katashi Aoki
固 青木
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 DE3752276T priority patent/DE3752276T2/de
Priority to PCT/JP1987/000897 priority patent/WO1988003864A1/ja
Priority to AU83273/87A priority patent/AU602380B2/en
Priority to EP19870907675 priority patent/EP0293485B1/en
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
    • B29C49/08—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
    • B29C49/071—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
    • B29C49/02—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)

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】 （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
ォ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っている。
この乳白部分２３の下縁のほとんどは、９部２２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９部２２に生ずる乳白部分２
３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って、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
易い材料樹脂をもっ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分よりも厚肉となし
た有底のプリフォームを射出成形し、そのプリフォーム
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の詳細な説明する
。
〔実施例〕
まず第１図に示すように、口部１の下部内側に段部２を
有する有底のプリフォーム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の形成はリップ型７及び射出型８と共にキ１
νビティを形成するコア型９の下部周囲に段部１０を設
けることによっ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
挿入をもって段部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のキャヒテイ
底部までロッド１３により延伸し、更にエアーの吹込を
もってキレビテイ一杯に膨張して、プリフオーム３を中
空の成形品１４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より下方が二輪配
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があった０部下
側を境にして引離に分かれ、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けを大きくして延伸し易くし、こ
れにより胸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
であっても、口部のみが乳白化した容器等を成形するこ
とかでき、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
を示づもので、第１図は金型鎖線で示すプリフォームの
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。

Claims (1)

    【特許請求の範囲】
  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
    伸部分よりも厚肉となした有底のプリフォームを射出成
    形し、そのプリフォ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
DE3752276T DE3752276T2 (de) 1986-11-20 1987-11-19 Spritzstreckblasformen von polypropylen oder dergleichen
PCT/JP1987/000897 WO1988003864A1 (en) 1986-11-20 1987-11-19 Injection stretching blow molding of polypropylene or the like
AU83273/87A AU602380B2 (en) 1986-11-20 1987-11-19 Injection stretching blow molding of polypropylene or the like
EP19870907675 EP0293485B1 (en) 1986-11-20 1987-11-19 Injection stretching blow molding of polypropylene or the like
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 true JPS63130330A (ja) 1988-06-02
JPH059258B2 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)

Cited By (1)

* 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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2007046998A1 (en) * 2005-10-14 2007-04-26 Exxonmobil Chemical Patents Inc. 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
GB2547767B (en) * 2014-05-01 2019-01-09 Gr8 Eng Ltd Apparatus for forming a blow moulded container

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
JPS5836420A (ja) * 1981-08-27 1983-03-03 Yoshino Kogyosho Co Ltd 壜体成形方法
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
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

Cited By (1)

* 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

Also Published As

Publication number Publication date
WO1988003864A1 (en) 1988-06-02
DE3752276D1 (de) 1999-07-08
AU602380B2 (en) 1990-10-11
JPH059258B2 (ja) 1993-02-04
EP0293485A1 (en) 1988-12-07
KR890700073A (ko) 1989-03-02
KR950000181B1 (ko) 1995-01-11
DE3752276T2 (de) 1999-12-16
AU8327387A (en) 1988-06-16
EP0293485B1 (en) 1999-06-02
EP0293485A4 (en) 1989-06-26

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