JPH0677958B2 - 合成樹脂容器の射出吹込成形方法 - Google Patents
合成樹脂容器の射出吹込成形方法Info
- Publication number
- JPH0677958B2 JPH0677958B2 JP27429890A JP27429890A JPH0677958B2 JP H0677958 B2 JPH0677958 B2 JP H0677958B2 JP 27429890 A JP27429890 A JP 27429890A JP 27429890 A JP27429890 A JP 27429890A JP H0677958 B2 JPH0677958 B2 JP H0677958B2
- Authority
- JP
- Japan
- Prior art keywords
- neck
- mold
- injection
- molded
- preform
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/023—Neck construction
-
- 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
- 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
- B29C49/02—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
- B29C2949/072—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
- B29C2949/0723—Preforms or parisons characterised by their configuration having variable wall thickness 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
- B29C2949/07—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
- B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
- B29C2949/0732—Preforms or parisons characterised by their configuration having variable diameter 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
- B29C2949/07—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
- B29C2949/07—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
- B29C2949/0777—Tamper-evident band retaining ring
-
- 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
- B29C2949/0778—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the flange
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2001/00—Articles provided with screw threads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Ceramic Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
吹込成形する方法に関するものである。
ねじ山などを有するプリフォームを射出成形し、そのプ
リフォームを吹込金型に移して容器に吹込成形してい
る。また吹込成形は、首部を保持して行っており、した
がって成形された容器の首部は射出成形されたプリフォ
ームの首部と全く変わるところがなく、高度の成形精度
を保っている。
様々であり、吹込成形では吹込金型の設計によって、自
由に設定し得るが、首部に関しては、確実な密封性なる
機能上の観点から、射出成形による成形精度が損なわれ
てはならず、このためその殆どが射出成形された時の状
態にある。
なものとなすために、首部を上下2段に外径を変えて成
形し、それらの外側にねじ山を形成する必要がある容器
もある。
下部を、胴部とともに首部上部よりも大径に吹込成形す
ることは、外側のねじ山も壁部の延伸により影響を受
け、その形状が変化してねじ山の成形精度が損なわれる
ことから採用され難く、これまでは射出成形により大径
に成形する以外に方法がなかった。
さに等しく首部下部の肉厚が増し、プリフォームの重量
が増すので、外径の大きさに制限を受け、また首部の冷
却にも時間を要し、この冷却が吹込成形を受ける胴部以
下に影響を及ぼすことから、通常の場合よりも吹込成形
を困難となすこと等にある。
えられたものであって、その目的は、首部下部を射出成
形と延伸との両方から大径に構成することができ、また
首部上部よりも大径に成形されても、ねじ山等は射出成
形された状態を維持し、大きさにも制限を受けない新た
な合成樹脂容器の射出吹込成形方法を提供することにあ
る。
上側が首部に接続した所要高さの外壁部を、プリフォー
ムとともに首部下部の周囲に射出成形し、その外壁部と
首部上部とを除くプリフォーム全体を中空に吹込成形し
て、首部下部が射出成形による外壁部と延伸された内壁
部とからなる容器に成形してなることにある。
したことにある。
部からプリフォーム底部までが自由状態にあるので、吹
込成形により内壁部から下方が延伸膨張するとともに、
内壁部の膨張部分が、ネック型に保持された外壁部と接
して、外壁部の下部開口を閉塞し、外壁部と胴部側とを
一体化する。
はネック型、2は射出金型、3はコア型、4はプリフォ
ームである。
れており、その移送盤5または上記射出金型2のいずれ
か一方あるいは両方の上下移動により、射出金型2の上
部と型閉じする。
た上記コア型3とによって、首部6の上部6aを形成する
型面と、射出金型との嵌合により、首部上部6aより大径
で上側が首部6に接続した所要高さの外壁部6bを、首部
下部に形成する型面とを有する。
5の上方よりネック型を貫通して、コア型3を射出金型
2の中央部に挿入位置させたのち、金型底部のノズル7
から射出金型内に、ポリエチレンテレフタレートなどの
溶融樹脂を射出して、後にそのまま容器の首部となる首
部6と、その下部周囲の上記外壁部6bとを一体に有する
上記プリフォーム4を成形する。
ア型3を抜出して、プリフォーム4をネック型1ととも
に、移送盤5により吹込成形位置に移す。
8は吹込金型、9は吹込コア、10は吹込コア内の延伸ロ
ッドである。
たネック型1は、吹込金型上に移送された後に、上記移
送盤5または吹込金型8のいずれか一方あるいは両方の
上下移動により、型開状態の吹込金型8の間の上部にセ
ットされる。
底部までが吹込金型8のキャビティ中央部に位置する。
9を挿入し、延伸ロッド10を伸長するとともに、空気を
吹込むと、首部下部からプリフォーム底部までが自由状
態にあるので、外壁部6bの内側の内壁部6cから下方が、
軸方向に延伸し、また側方へ膨張する。
ック型に保持された上記外壁部6bと接して、外壁部6bの
下部開口を閉塞し、外壁部6bと胴部側とを一体化する。
すもので、首部下部は射出成形されたままの大径の上記
外壁部6bと、一部が延伸された内壁部6cとから構成さ
れ、必要に応じて射出成形されたねじ山12などは、吹込
成形時において外壁部6bが固定の状態にあることから、
外壁部とともに射出成形時の形状を保ち、後にプリフォ
ーム4を吹込成形するものでありながら高度の成形精度
を維持する。
部に接続した所要高さの外壁部を、プリフォームととも
に首部下部の周囲に射出成形し、吹込成形によりその外
壁部と内側の延伸された内壁部とから首部下部を形成す
るようにしたので、首部下部を射出成形のみにより大径
に成形する場合よりも薄肉に成形することができ、冷却
にも時間を要せず、またその径も制限を受けることがな
い。
に不変であるので、外側に成形したねじ山も成形精度を
維持し、射出成形のために開口された外壁部の下側も、
吹込成形により内壁部により閉鎖されて胴部と一体とな
るので、容器としての体裁が損なわれるというようなこ
ともない等の特長を有する。
法の1実施例を示すもので、第1図はプリフォームの射
出成形工程を説明する断面図、第2図はプリフォームの
吹込成形工程を説明する断面図、第3図は成形された容
器の半部縦断正面図である。 1……ネック型、2……射出金型 3……コア型、4……プリフォーム 5……移送盤、6……首部 6a……首部上部、6b……外壁部 6c……内壁部、7……ノズル 8……吹込金型、9……吹込コア 10……延伸ロッド、11……容器 12……外壁部のねじ山
Claims (2)
- 【請求項1】首部上部より大径で上側が首部に接続した
所要高さの外壁部を、プリフォームとともに首部下部の
周囲に射出成形し、その外壁部と首部上部とを除くプリ
フォーム全体を中空に吹込成形して、首部下部が射出成
形による外壁部と延伸された内壁部とからなる容器に成
形してなることを特徴とする合成樹脂容器の射出吹込成
形方法。 - 【請求項2】外壁部は外側にねじ山が形成されているこ
とを特徴とする請求項1記載の合成樹脂容器の射出吹込
成形方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27429890A JPH0677958B2 (ja) | 1990-10-12 | 1990-10-12 | 合成樹脂容器の射出吹込成形方法 |
EP19910402708 EP0480836A3 (en) | 1990-10-12 | 1991-10-10 | Injection blow molding method for synthetic resin containers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27429890A JPH0677958B2 (ja) | 1990-10-12 | 1990-10-12 | 合成樹脂容器の射出吹込成形方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04148915A JPH04148915A (ja) | 1992-05-21 |
JPH0677958B2 true JPH0677958B2 (ja) | 1994-10-05 |
Family
ID=17539700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27429890A Expired - Lifetime JPH0677958B2 (ja) | 1990-10-12 | 1990-10-12 | 合成樹脂容器の射出吹込成形方法 |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0480836A3 (ja) |
JP (1) | JPH0677958B2 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2267076B (en) * | 1992-04-30 | 1996-06-19 | Beeson & Sons Ltd | Method and apparatus for forming sealable containers |
GB2251844B (en) * | 1990-12-29 | 1995-07-05 | A K Tech Lab Inc | Bottle with handle |
GB2278802B (en) * | 1990-12-29 | 1995-07-12 | A K Tech Lab Inc | Method for moulding an article |
US5573143A (en) * | 1994-09-21 | 1996-11-12 | Colgate-Palmolive Company | Blow molded multi-chamber containers with dispenser/doser |
GB9524553D0 (en) * | 1995-11-30 | 1996-01-31 | Britton Charles J | Plastic lever lid tins |
US6076688A (en) * | 1996-08-09 | 2000-06-20 | Forget; Gerald L. | Hot fillable plastic bottle neck design |
US6523720B1 (en) * | 2000-06-30 | 2003-02-25 | Ocean Spray Cranberries, Inc. | Dispensing consumable liquids |
JP2002166465A (ja) * | 2000-11-29 | 2002-06-11 | Aoki Technical Laboratory Inc | 広口容器の延伸ブロー成形方法及びブロー金型 |
EP1927460A2 (en) * | 2001-07-17 | 2008-06-04 | Frontier Inc. | Biaxial stretch blow molding apparatus for wide-mouthed containers |
JP5176187B2 (ja) * | 2008-11-27 | 2013-04-03 | 株式会社吉野工業所 | 合成樹脂製プリフォーム及び2軸延伸ブロー成形壜体 |
CN107031950A (zh) * | 2017-05-04 | 2017-08-11 | 精英模具(合肥)有限公司 | 一种带有裙边的瓶体及瓶体的注塑成型方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2131344B (en) * | 1982-12-08 | 1986-04-30 | Metal Box Plc | Blow moulding bottles |
NL8702509A (nl) * | 1987-10-21 | 1989-05-16 | Packaging & Container Manufact | Voorvormling voor een houder. |
-
1990
- 1990-10-12 JP JP27429890A patent/JPH0677958B2/ja not_active Expired - Lifetime
-
1991
- 1991-10-10 EP EP19910402708 patent/EP0480836A3/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
EP0480836A3 (en) | 1993-04-14 |
JPH04148915A (ja) | 1992-05-21 |
EP0480836A2 (en) | 1992-04-15 |
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